The Transformation of Traditional Manual Punch Enterprises is Imminent

Every industry is divided into 28%, 20% of the enterprises occupy, 80% of the market and profits, and 80% of small enterprises, rushing to grab the remaining 2% ten.

Today, we will not talk about leading companies, but only the status quo of small companies.

Relying on the advantages of capital, the leading enterprises used automatic equipment early, eliminated the traditional manual punching machine, and resolved various disadvantages brought by rising costs by virtue of their own advantages.

Small businesses have no capital advantage and no talent advantage. Traditional hand punching machines earn meager profits from hard work.

They want to use equipment and recruit talents, but their own conditions do not allow it. Take a Minghuang manipulator as an example, a single machine is more than 30,000, and a production line needs 4-5 units, which can replace the workload of 5 people. A production line plus punches, molds, etc., is close to more than 200,000.

For small businesses, this is close to half a year or even a full year of profit. If there is any error in the equipment, it is very likely that the capital chain will break. Opportunities to expand your business.

The cost of enterprises is rising and the market tends to be saturated. In order to survive, the market is constantly conducting vicious competition, which makes the living environment of enterprises even worse.

At this time, industrial intelligence began to sprout. With strong, stable and fast productivity, a lot of labor costs were reduced, and some profit margins were freed up. Small enterprises that have freed up smart equipment have strong and stable productivity, and further squeeze has long been saturated. The supply of the market exceeds the demand, and the price will naturally drop, making the already fiercely competitive market even more red sea.

By this time, it is no longer a competition between enterprises, but a competition between enterprises representing intelligence and traditional handicraft industries.

Things must rot first and then grow by themselves. Intelligence has occupied the balance of victory since birth. Traditional handicrafts will not die out. They will have some markets, like Pinduoduo, but most enterprises with slow transformation will disappear. The market has been sublimated and can no longer accommodate so many companies.

For companies that are still relying on traditional manual punching machines, the transformation is imminent. You don’t need to be faster than the times, you must be faster than your peers, and one step behind him, he will seize your future one step ahead.

More: Can Making Machine

How Do Metal Can Making Equipment and Metal Can Sealing Equipment Work

How do metal can making equipment and metal can sealing equipment work How does the paint can sealing machine work?

(1) The sealing form of the metal container. Any two-piece can (barrel) body or three-piece can (barrel) body and the top or bottom of the joint, there is at least one.

Or two seams (except for single-piece spray cans). The only opening method that has been used on metal containers for more than a hundred years is double crimping (doubleam), can withstand the strict drop test requirements, the vat adopts triple seam (triple seam). According to the different requirements of the content, the degree of sealing after sealing can be divided into air-tight mouth (closed form that does not leak gas at the seal), liquid-tight mouth (closed form that does not leak liquid at the seal) and tightly sealed mouth (not at the seal) Closed form of leaking solid).

Metal containers have an irreplaceable position because they can store food for a long time, but they also have disadvantages, that is, leakage at the seal is easy.

Leakage, causing corruption or leakage of the contents. According to statistics from the light industry department, nearly 70% of the quality accidents of food cans in my country are caused by sealing problems, which shows the importance of metal container sealing.

(2) The structure of double crimping The double crimping is the combination of the can (barrel), the lid and the bottom, and it is a five-layer occlusal connection.

Its structure is shown in Figure 3-1. It is composed of two-layer tank (barrel) body material, three-layer tank (barrel) top and bottom cover material and sealant embedded between them. Hemming thickness (T), hemming width (W) in double hemming structure; countersunk, body hook length (BH), cover hook length (CH), overlap length (a, overlap rate), wrinkles Indexes such as degree (tightness) are the elements that constitute the double hemming.

Although the basic structure of the double hemming has not changed, there are some changes in its form, such as changing the shape of the hemming, or shifting the hemming, or reducing the size of the hemming structure. The appearance of double curling has two forms: ear-shaped and rectangular. The economical sealing method is shown in Figure 3-2. The curling is different from the common curling. It is located at the bottom of the can. This change in form does not change the basic structure of the double curling, but only changes its position. As a result of this change, 28% of the can lid material can be saved. In addition, a kind of micro-shaped crimping (Iminiscaimling) used for 206 beverage cans also only changes the size of the double crimping, without changing its basic structure, that is, the common crimping length is reduced, and the sealing performance after the change is completely possible. It satisfies the sealed storage requirements of beverage cans, and also saves lid materials and can sealing glue.

(3) The main components of the crimping mechanism and its functions The crimping mechanism is composed of three parts: the seaming chuck (seaming chuck) sealing wheel (wmtd) and the (base plate). These three parts are called the three elements of the crimping seal. ,Indispensable.

①Sealing wheel The sealing wheel is divided into one sealing wheel and two sealing wheels according to the working order. There are three forms of sealing wheel: outer plate.

Line sealing wheel, inner curve sealing wheel and inner curve sealing rail.

a. Outer curve sealing wheel The sealing surface of the outer curve sealing wheel is on the outer circle. This form of sealing wheel is easy to process, detect and manufacture.

Low cost, simple installation and adjustment. Since the sealing wheel is on the outside of the sealed can, two or four sealing wheels can be distributed on the circumference, which can complete one and two sealing processes on a curling mechanism at the same time. The sealing wheel is equipped with a centripetal thrust bearing. During the sealing process, due to the sealing force, the sealing wheel rotates freely (slave) around the installation axis.

b. The inner curve sealing wheel (less common) The sealing curve of the inner curve sealing wheel is on the inner side of the inner hole of the sealing wheel, and the optical projection method cannot be used.

Method inspection, so processing and inspection are inconvenient and the manufacturing cost is high. At the same time, because the sealing wheel covers the lid of the can, it is impossible to complete one and two winding sealing processes on a curling mechanism at the same time, so the machine structure is more complicated, the efficiency is lower, and the cost is higher. However, the inner curve sealing wheel also has its advantages. Because the inner curve aperture of the sealing wheel is closer to the diameter of the can lid, the contact surface between the sealing wheel surface and the can lid during the rolling process is much larger than the outer curve sealing method, so the inner curve sealing wheel The sealing process is more reasonable and the quality will be higher.

The inner curve sealing wheel is the same as the outer curve sealing wheel, which is mounted on the centripetal thrust bearing. During the sealing process, the sealing wheel rotates freely around the installation shaft (driven) due to the sealing force.

c. The inner curve sealing track The inner curve sealing track is the same as the inner curve sealing wheel in that both use the inner sealing curve.

It has the advantages and disadvantages of the inner curve sealing wheel. It is also different from the inner curve sealing wheel: first, the inner curve sealing track is fixed (that is, there is no rotating movement of its own), and the track does not move can simplify the machine structure, but it also makes the difference between the two because the track does not move with the tank. Large relative sliding is inevitably produced (the sealing equipment must be suitable for a certain tank diameter range. If the middle diameter of this range can be designed to be the smallest relative sliding, the relative sliding will occur when the tank diameter changes, and it will increase with the change of the tank diameter. The relative sliding volume causes scratches on the curling surface; secondly, the inner diameter of the inner curved track is very large, which can accommodate several or more curling mechanisms at the same time.

②The pressure head (also called seaming chuck) is used to fix the position of the can body and the can lid, so that the thickness of the coil is uniform and consistent.

Keep the seal tight. At the same time, the outer circle of the indenter is a cone of 4, which functions to generate enough friction with the pressure of the tray to prevent the can lid and the sealing wheel from stagnation or stagnation due to the deformation of the metal seal during the sealing process or between the can lid and the indenter. The countersunk depth and outer diameter of the pressure head should be consistent with the countersunk degree and can diameter of the can lid. The countersunk depth of the pressure head often affects the width of the lid hook.

The indenter often needs to be prepared with the can lid to ensure good performance.

③Tray (or supporting chassis, lifting plate) The tray is used to hold the can body, hold the can body with the lid to the sealing operation station, and press the lid and the can body together, and the spring of the tray pressure head will face the can Pressure is applied to the body and the lid of the can to prevent heading of the can in the sealing process.

(4) The forming process of double curling The double curling is carried out in two steps, which are completed by one sealing wheel and two sealing wheels respectively.

As shown in Figure 3-3. First, a sealing wheel moves radially relative to the can body. The sealing force of the sealing groove of the sealing wheel and the arc edge (or straight edge) of the can lid causes the outer edge of the can lid to curl in the normal direction of the groove curve, and a sealing When the wheel moves to position 3, the preliminary shaping of the sealing crimping is completed, so that the can cover and the can body flanging mouth along its periphery will be bent into an initial joint of a certain shape and size as required. Then a sealing wheel exits the roll-sealing position. At the same time, the second sealing wheel starts to work, moves radially relative to the tank body, pushes the curling edge that has a preliminary shape, and presses it firmly until the second sealing wheel completes the curling operation at 5 o’clock, so that the tank benefits and the tank The body forms a tight seam and the last two sealing wheels return, and the sealing process ends.

(5) The feed movement of the double crimping while the first and second sealing wheels move radially along the can body, the sealing wheel moves back relative to the can body.

Rotational motion, the combination of the two motions is called the feed motion, and the radial motion of the sealing wheel per revolution of the tank is called the feed. There are two forms of rotary motion: one is that the can body rotates and the sealing wheel does not move; the other is that the can body does not rotate, and the sealing wheel rotates around the can body. These two different exercises have the same effect on the sealing process. In the process of crimping and sealing, the metal of the part of the can body that participates in crimping has undergone tensile and compression deformation. In order to meet the requirements of the quality of the sealing and crimping, the crimping process should make the metal material deform evenly, and the amount of deformation per unit time is not too large, that is, the sealing wheel is along the diameter of the can body during the rotation of the sealing wheel around the can body. The feed amount in the direction is uniform and cannot exceed a certain limit. The feed rate is small, the sealing quality is good, but it will reduce the production capacity of the equipment; the feed rate is large, the equipment production capacity is improved, but the sealing quality is reduced. Generally, the feeding movement of one sealing wheel of the sealing machine is completed in about three revolutions of the sealing wheel around the can body, and the feeding movement of the second sealing wheel is completed in two revolutions of the sealing wheel around the can body. At present, there are two common feeding methods for the sealing wheel: one is an eccentric mechanism (commonly used for sealing equipment without rotation of the can body), the sealing wheel is installed on the eccentric shaft, and the planetary gear system drives the can body to rotate Movement, in the process of the sealing wheel rotating around the can body, the eccentric shaft rotates slowly and the eccentric shaft rotates one circle, which completes the feed motion of the two curling. This feed motion is not uniform, but close to the law of cosine; another One kind is to drive the swing arm by a cam. Its motion law depends on the design of the cam. In general, the cam can be designed to move at a constant speed except for the complicated motion wheel at the starting point, ignoring the slight difference between the swing arm and the linear motion. The inlet mode of the sealing wheel of the cam-driven swing arm is relatively close to the uniform feed motion. The more special one is the orbital sealing. This type of can sealing machine adopts a vertical type. The can body is driven by the pressure head and the tray to rotate. A workstation has multiple can bodies that rotate in this way and revolve around the rotation center of the workstation together. The arc center of the guide rail is installed eccentrically, and the amount of eccentricity is the total stroke of the sealing feed.

Factors Affecting Double Hemming

The main factors affecting double curling are as follows:

1.Appropriate sealing pressure

During the rotation of the can body, the rolling force P of the roller groove at the junction with the can lid is the combination of the radial force Pr, the axial force Pa and the tangential force Pt in three different directions. Among them, the first-pass sealing force P1 is mainly manifested as the bending deformation of the surrounding material of the can body and lid, and the second-pass sealing force P2 compression is mainly manifested as plastic deformation. The calculation of the two rolling forces is carried out through energy balance and plastic deformation. Generally, the sealing force of the second pass is 2 to 3 times that of the first pass.
  
In the actual operation process, the proper sealing force is achieved by the proper matching position relationship between the sealing roller, the indenter and the can tray (such as the adjustment of the inner and outer gaps between the roller and the indenter, etc.).
  
  
1. The appearance requirements of the tinplate barrel sealing process are mainly manifested in: (1) The double crimping should be uniform and smooth, and the surface should be free of obvious oil and damage; (2) The crimping part must not have slip seals, false rolls, and crimping cracks. , Double lines, extrusion and other defects; specifications and size requirements are mainly manifested in: (1) the curling size of different can types must meet the corresponding process size requirements; (2) the splicing length and splicing rate, tightness, and seam Cover hook complete rate.
  
The sealing structure of double crimping can be sampled by a can edge cutter, and it will be displayed on the projector.

2. Correct operation and adjustment of the operator
  
The skilled technical skills and operation level of the operator, as well as the necessary daily maintenance and maintenance are also a factor that affects the double hemming. For example, when you need to make necessary adjustments when changing the tank type or when there is an abnormality in the roll seal, correct and reasonable adjustments are also very important in addition to replacing the necessary parts. Generally, under the proper driving force of the can tray, first check the Tc value of the head edge width (2.20±0.10mm), and then visually observe the tightness of the curling edge around the can lid. Check appearance defects and various size and craft requirements. Make correct analysis and judgment for the causes of different defects before making adjustments.

3. Process size of empty cans
  
The lid hooks and can body flanging of different can shapes should meet the corresponding process requirements. For example, poor welding (>0.5mm tailing, welding cracks) before sealing, and too large or small flanging will affect the empty can. Roll seal performance.
  
4, the groove shape and material requirements of the sealing roller
  
Generally speaking, the sealing rollers of different can types have different groove shapes. Generally, the groove of the first roller is deep and narrow, and the groove of the second roller is wide and shallow. At present, the commonly used reels of domestic can sealing equipment are mostly medium carbon steel, such as 45#, 40Cr, with short service life, and the output is only limited to 200 to 300,000 cans; the commonly used reels for more advanced sealing equipment are generally 4Cr13, 9Cr18, etc. Stainless steel is made by vacuum heat treatment. It has high hardness, good wear resistance and long life. It can make about tens of millions of cans.
  
Among the three elements of sealing, the sealing roller is a vulnerable part. It should be polished or replaced with 1 000# or 1 200# water-based sandpaper in time depending on the production situation, so as not to affect the process performance of the curling and sealing.
  
5, the coating state of the sealing paint
  
The correct coating position distribution of the plastic film in the crochet side of the can lid is: about 70% in the crochet side and about 30% in the flat surface. In addition, the size of the rubber modulus must meet its own process requirements. If the amount of glue is too large, it is easy to form squeezed glue, and if the amount of glue is too small, it will not function as a sealing filler.
  
6. The correct operation and adjustment of the operator
  
The skilled technical skills and operation level of the operator, as well as the necessary daily maintenance and maintenance are also a factor that affects the double hemming. For example, when you need to make necessary adjustments when changing the tank type or when there is an abnormality in the roll seal, correct and reasonable adjustments are also very important in addition to replacing the necessary parts. Generally, under the proper driving force of the can tray, first check the Tc value of the head edge width (2.20±0.10mm), and then visually observe the tightness of the curling edge around the can lid. Check appearance defects and various size and craft requirements. Make correct analysis and judgment for the causes of different defects before making adjustments.
  
Note: (1) The size specifications are measured by anatomical experiments; (2) The first hemming is the basis and premise of the second hemming, and it is generally checked at least once a week during normal production.
  
7. The integrity of the equipment
  
The integrity of the sealing equipment directly affects the sealing performance of the sealing process, which is related to the correct operation and maintenance of the operator.

The Performance of Electroplated Tin Steel Sheet, the Trend of Tinplate in 2022

1. What is tinned steel sheet

Tin plate (hereinafter referred to as tin plate or tinplate) due to its substrate has suitable strength, excellent weldability and stamping properties, and the surface coating has good corrosion resistance and is easy to coat and print. Therefore, it is widely used Food packaging is also used in the packaging of various forms of articles such as sprays, chemicals, paints, and the manufacture of various appliances.

The electroplated tin plate developed on the basis of hot-dip tin plate has a production history of more than 70 years. The tin-plating production lines and total output in the world are basically stable, but developing countries have built or are building some tin-plating units one after another. China’s development is particularly obvious. In terms of varieties, secondary cold-rolled tin plate and plated plate (TFS) have been greatly developed. Japan’s coated iron (TFS surface is covered with a plastic film) has developed rapidly in recent years. The production and consumption of tinplate in developing countries is increasing rapidly, and developed countries are characterized by the development of new cans, exquisite printing, and environmental protection.
The development of tinplate in China started late, and it has mainly relied on imports for a long time, with a self-sufficiency rate of less than 50%. In the 1990s, Japan, South Korea, Taiwan and Hong Kong successively built factories in the mainland, which greatly increased the production capacity of tin plate. In particular, the two tin-plating production lines of Baosteel put into production in 1998, which increased the self-sufficiency rate of China’s tin-plated sheet to about 70%. Moreover, high-difficulty products such as K-plate and DI material were also provided domestically, which changed the K-plate required by our country. (The state of plain iron is applied to the high corrosion resistance tin plate of fruit cans> The long-term dependence on imports, the production of DI material (two-piece tin plate for beverage cans) has made Baosteel one of the few iron and steel plants in the world that can produce this product. Ranks.

Metal packaging has experienced more than 20 years of development in China’s reform and opening up, and now it has formed a complete metal including printing iron, cans (two-piece cans, three-piece cans), aerosol cans, various bottle caps, steel drums, etc. The packaging industry system has become one of the important categories of China’s packaging industry.

With the rapid development of China’s economy, the total consumption of tin plate required for metal packaging is increasing at a rate of about 10% every year. It can be expected that the demand for tin plate in China will continue to develop at a relatively high speed in the next few years.

Second, the structure of tinplate

The tinplate consists of five layers, and its cross-sectional structure and thickness are shown in Figure 2-1.

Third, the performance of tin plate

1. Material characteristics

(1) The degree of quenching and tempering (expressed by the surface Rockwell hardness HR30T) The degree of quenching and tempering represents the mechanical properties of the material. Under the same manufacturing conditions, it better represents the material performance, but in the annealing process (continuous annealing or hood type) When annealing) is different, the same quenching and tempering degree shows different strength and elongation. The thickness of the substrate is different, and there is a certain difference between the measured value and the actual value due to the anvil effect. Due to aging reasons, the degree of quenching and tempering will also change.

(2) Formability Except that the material has to withstand severe deformation during drawing and other processing, general can-making and lid-making processing can withstand tin plate. Uniform performance is required, and the grain size of the material is suitable (the tin plate is generally 7# ~ 9#). With the acceleration of the can-making speed, it is required that the material performance fluctuation is small, the thickness fluctuation is small, and the plate shape is good, otherwise it is easy to cause defects such as can jam. In order to prevent ridges in can making and tensile strain during punching, the tin plate is required to have a small strain aging effect.

(3) Directionality In addition to DI materials which have strict requirements for anisotropy, in general can-making processing, the direction requirements are not too strict. For the secondary cold-rolled tin plate, the longitudinal and transverse properties are quite different (transverse σsσb). Large, low elongation), the circumferential direction of the can body is required to be consistent with the rolling direction. When the primary cold-rolled tin-plated sheet has expanded-diameter and square-shaped tensile deformation, it is better to make the circumferential direction of the can body consistent with the rolling direction, which can reduce the occurrence of defects such as cracking and local deformation.

2. Size and shape

Thickness: The thickness tolerance is required to be small, the standard is ±8.5%, the actual requirement is much lower.

Width and length: The tolerance is required to be small, the standard is -O/+3mm, the actual requirement is much smaller.

Flatness: Large warpage, medium waves, and edge waves will affect iron printing and can making, and it is required to be within 3mm.

Pinhole: In the tin plate production process, it is detected by a pinhole instrument. The leak detection device on the canning line is also very important to prevent leaking cans from leaving the factory.

3. Surface characteristics

(1) Surface roughness The surface roughness of the substrate is obtained when it is leveled. In addition to the DI material drawing process, the roughness has an important influence, and the roughness can improve the adhesion of the tin layer and the paint layer; increase Roughness, not easy to scratch or abrasion.

(2) The amount of tin plating The thicker the tin plating layer, the fewer the pores and the higher the corrosion resistance. It is necessary to study how to obtain a tin plating layer with good continuity and high corrosion resistance with a relatively small amount of tin plating. In addition to requiring a clean surface of the original plate, the electroplating process must be controlled, and the process parameters must be stable to reduce fluctuations.

(3) The tin-iron alloy layer is reflowed to obtain the required tin-iron alloy layer, which improves the adhesion of the tin-plated layer and the corrosion resistance of the tin-plated plate. The K plate requires a higher alloy layer; the box layer is hard and hard. Brittle, too thick will reduce the welding performance, but also easy to fall off. It is necessary to control the continuity of the alloy layer and the compactness of the arrangement to produce a tin plate with high corrosion resistance.

The key of the reflow process is to complete the heating according to the desired reflow heating curve. The combination of resistance heating and induction heating provides good conditions for the control of reflow.

(4) Passivation layer Obtained by chromate passivation treatment, it can effectively inhibit the oxidation of tin, improve the coating and corrosion resistance of the tin plate, and can effectively prevent the occurrence of vulcanization spots.

According to the use and different contents, different passivation layers are required, such as food cans such as oranges, cherries, pineapples, pears and peaches and 18L bamboo shoots cans, which require high power for passivation.

(5) Coat a layer of DOS oil on the oiled surface, which acts as a lubricant to prevent scratches, abrasions, abrasions, and rust prevention. But when the oil is applied too much or unevenly, it is easy to cause “eyeholes” defects in the coating film.

4. Corrosion resistance

(1) Corrosion resistance of canned plain noodles For canned food such as oranges and pineapples, plain iron is used to maintain the flavor and color of the food in the can. Most of these foods are acidic and require high corrosion resistance. The main factors related to corrosiveness are tin plate materials for can-making, types of contents, canning conditions, storage conditions, etc.

From the perspective of tin plate materials, in an acidic environment without oxygen, tin is first corroded and dissolved to protect iron. In order to improve the corrosion resistance of tin plate, strict production control is required, and high corrosion resistance plate (ie K plate) is provided to users.

(2) Corrosion resistance of painted cans In order to reduce costs and save precious tin resources, people no longer increase the corrosion resistance by adding tin coatings, but paint with lower tin coatings to improve cans. Long life; painting can also prevent sulfur-containing protein foods from sulfide blackening; flavors such as beverages, beer, etc. are sensitive to the presence of small amounts of dissolved metals, so paint cans are used.

It is necessary to ensure that the coating film is complete and free of defects. Cans no longer rely on the dissolution of tin to prevent corrosion of the substrate, and the paint layer has become the first line of defense. Someone has done a test: the shelf life of cans with defective coating films is much shorter than that of unpainted cans. Therefore, it is necessary to prevent scratches on the coating film, damage to the flanging part, or peeling of the coating film generated during the stamping of the can lid. . In order to ensure the quality of the coating film, paint is sometimes applied multiple times; for strong acid beverages, internal spraying must be carried out after the can is made to prevent rapid corrosion or even leakage of the can.

5. Finishing

Most of the tin plate needs to be coated, and the quality of the coating will directly affect the corrosion resistance of the metal can; some also need to be color printed. Finishing properties include wettability and adhesion.

(1) Wettability: The paint does not wet or has eye holes, and it concentrates on corrosion at the defective part. Compared with unpainted, it is more prone to pitting corrosion. There are many factors that affect wettability, including paint, finishing conditions and tinplate.

The main reasons caused by the tin plate are as follows:

① Too much oil or uneven oil.

② Foreign matter adheres to the surface. Machine oil, silicone resin, fine powder, moisture, etc.

③Surface condition, aging, storage temperature, etc.

(2) Adhesion When the adhesion of the coating film is not good, cracks, peeling or peeling will occur during processing and deformation.

Adhesion is also related to paint and painting process. The factors related to tin plate are as follows:

① Through passivation treatment, the oxidation of tin is inhibited and the adhesion of paint is improved. However, the storage time and the number of repeated heating and baking affect the adhesion.

②The influence of surface roughness.

③The influence of tin layer thickness.

6. Weldability

The three-piece can body and various barrels must be welded. Therefore, the quality of the weld is very important. It is required to adjust the welding parameters reasonably to obtain a smooth, dense and uniform weld to prevent concentrated corrosion and even leakage.

The base plate of tin plate is mostly low-carbon aluminum killed steel, and the welding performance is good. With the acceleration of can-making speed, stable welding performance is required. The relevant performance of tin plate must be guaranteed, mainly as follows:

①The steel is pure, with small thickness deviation and uniform hardness.

②The surface is clean, free of dust and garbage.

③The surface roughness is appropriate.

④The lower the tin-plated layer, the better the soldering performance. When the tin-plated layer is low, control the tin-iron alloy layer to ensure a certain pure tin layer.

⑤The welding parameters of tin plate with IF steel as the base plate should be controlled carefully.

More: Automatic Can Making Machine

Operation Status of China’s Metal Packaging Industry in 2021

In 2020, due to the overall decline of the entire industry due to the epidemic, the areas of aluminum beverage beer cans, milk powder cans, canned food and easy-open lids are still growing against the trend to varying degrees. Benefit from my country’s continuous implementation of the green and low-carbon cycle and the increase in beer canning rate and
the demand for materials and the increased volume of home consumption culture, the demand for two-piece cans has steadily increased, the supply-demand relationship has continued, and some foreign brands have withdrawn from the market, leading companies have merged and integrated, and the competition situation has continued to improve (CR4 reached 70%.), 2 The continuous growth of the aluminum cans and beer beverage market has been affected by the foreign epidemic, and foreign milk powder cannot be imported.In addition, milk powder is beneficial to enhance immunity and promote health. The demand for domestic milk powder has grown rapidly, which has benefited from the epidemic and unexpectedly increased. The second subdivision area of volume;

The third growth segment is canned convenience foods such as eight-treasure porridge, luncheon meat, fruits and vegetables, fish, etc. The export and domestic sales are booming. In addition, at present, there are more and more domestic cover enterprises, showing a large-scale and professional development trend head. Guangdong Yinglian and Xiamen Baofeng aluminum cover, Zhejiang Yiniao and Changhong iron cover, Wuxi Huapeng and Shandong Global’s unscrewed cover, Shanghai Ziquan crown cover, Shandong Lipeng anti-theft cover, etc., showing a stable development trend. The newly developed is more convenient, opening the aluminum full-open lid with safety edge, transparent retort-resistant easy-to-tear lid, screw-open crown lid with thread, various customized squares, horseshoes, ellipses and other personalized easy-pull (tear-off) ) Cover, greatly enriched products, prospered the market, and replaced imports, promoted and promoted the development of metal packaging. The overall development of the cover market in 2020 is relatively good, showing a growth trend and the impact of the epidemic is minimal.

The three-piece beverage cans are most affected by the epidemic, and the relatively slow recovery is the aerosol cans and chemical cans. Affected by the epidemic, the three-piece beverage cans have endured the test of cliff-like decline and stagnation under the influence of team dinners, group consumption, and tourism consumption. Data show that in 2020, it will drop by more than 20% year-on-year. With the recovery of consumption after the epidemic, beverages, as basic consumption, have the strongest ability to resist risks. At present, it is the first to get out of stagnation and resume growth. The first four months of three-piece beverage cans in 2021 are basically the same as the same period in 2019. Aerosol cans belong to the modern consumer goods on the smallpox, and a large proportion of chemical cans are used for engineering construction. At present, the recovery process affected by the epidemic is inferior to beverages and food, and the pressure of competition continues to increase, which has become a real challenge in 2021. It is believed that resources will be tilted toward leading companies and will be the first to resume growth. Miscellaneous cans have slightly declined due to the epidemic, and will begin to show an increasing trend in 2021.

The influence of iron and aluminum materials on the industry continues to increase. On the one hand, with the improvement of other performance requirements such as tinplate and aluminum thinning, stretching, corrosion resistance, surface decoration, etc., the selection of metal packaging materials is biased towards enterprises in the whole industry chain; on the other hand, iron and aluminum enterprises increase the national market With the integration of production capacity and the continuous improvement of concentration, the demand for metal packaging materials for cans, lids and barrels enterprises is more inclined to solutions and their reliance has increased. The data shows that the apparent consumption of tinplate in 2020 is 510 tons (including export), a year-on-year decline. The apparent consumption of aluminum was 1.5 million tons, a year-on-year increase of 6%. It is expected that as the concentration of iron and aluminum enterprises increases in the future, the market position will become more prominent.

What Are the Characteristics of Tinplate Packaging

At present, the packaging materials in the world are none other than tinplate boxes. Why? Because it has the following three characteristics:

1. Outstanding airtightness
The barrier properties of the packaging container to air and other volatile gases are very important for the retention of nutrient components and sensory quality. Comparing with various juice packaging containers, it is confirmed that the oxygen transmission rate of the container directly affects the browning of juice and the retention of vitamin C; metal cans, glass bottles, aluminum foil laminates, and cartons with low oxygen transmission rate can retain vitamin C Better, the tinplate box is the best choice in the meantime.

2. The reduction effect of tin
The tin on the inner wall of the tinplate will interact with the oxygen remaining in the container during filling, reducing the chance of oxidation of food ingredients. The reducing effect of tin has a good retention effect on the light-colored fruit, the flavor and color of the juice. Therefore, the juice cans packed in unpainted iron cans retain very good nutrients than those packed with other packaging materials, and the browning changes slightly. , The flavor quality is better tolerated, so the shelf life is extended.

3. Opacity
In addition to the adverse effects of light on food, it can also cause changes in protein and amino acids. And vitamin C is more easily irradiated by light to make it interact with other food ingredients, resulting in a lot of loss. According to research and analysis, the loss of vitamin C in transparent glass bottled milk is 14 times higher than that of dark bottled milk. Light will also cause milk to produce oxidative odor, as well as nuclides, methionine, etc., to lose nutrient value. The opacity of the tinplate makes the vitamin C retention rate very high.

How Are Tinplate Boxes Made?

Tinplate boxes are a packaging alternative to plastic boxes. It is naturally degradable and environmentally friendly, unlike plastic boxes that pollute the environment; this tinplate box provides many new business opportunities. How are they made? How can they become additional sales tools?

Manufacturing of tinplate boxes
The main materials of tinplate boxes are steel and tin. Therefore, this material is completely natural and recyclable. Tinplate is obtained by converting iron ore into tinplate. These tin-plated iron sheets then undergo various processing techniques until the iron plates used to make tinplate boxes are obtained. The iron sheet is first plated with tin and then wound into a roll; these heavy spools are the material for making tinplate boxes, and can be shaped to the required thickness in the tinplate factory according to the needs of customers. The tinplate on the reel is ordered according to the order.

Tinplate and the environment
Tinplate boxes are products made from completely natural raw materials. Therefore it is biodegradable naturally. Its environmental friendliness is unmatched by plastics. Whether it is produced or used, plastic bags have a very negative impact on the environment. It is for this reason that regulations allow the phasing out of plastics for packaging and commercial packaging.
On the contrary, tinplate boxes are recyclable and biodegradable. Its manufacturing process is less harmful to the ecosystem, and the recyclability of tinplate boxes is very important: it is part of a benign environment because it can be remanufactured after recycling.
The last aspect is very important, because the water consumption of tinplate boxes is 6 times lower than that of plastic boxes.
Regarding environmental impact, it is ideal to use certified tinplate. The label certifies that tinplate production complies with the principles of sustainable development. Therefore, the production of tinplate can be fully integrated into ecological methods. This is not a simple demonstration, but a real consideration of the impact of human consumption on ecology and climate change. Some tinplate box manufacturing plants also benefit from the recognized low environmental impact label (ISO 14001 environmental management). These manufacturing units comply with relevant ecological management standards at all stages of tinplate box design.

Reliability and stress resistance of tinplate boxes
Tinplate boxes are also called “tinned tin boxes”. Some people think it is not as durable as most plastic bags, these are prejudices. The tinplate box actually has a good seal, good extensibility and good pressure resistance. Plastic boxes and cartons do not have these advantages. Now, especially in the holiday gift packaging industry, most gift manufacturers choose tinplate packaging boxes, because they have good metallic luster, exquisite printing, and appear to be more upscale.
The only real “weakness” of the tinplate box is that when the coating is damaged, it reacts chemically with the surrounding water and oxygen, which makes it easy to rust. But in terms of resistance to weight, it is just the opposite! Many heavy material manufacturers also choose tinplate.
The tinplate box can also be made into a form with a handle; the shape of the tinplate box tends to be decisive for the content. Some models with flat handles can support up to 15 kg of cargo. These are reusable and can be used for a considerable period of time.

How to choose the right tinplate box?
According to the needs of you and your customers, there are many possibilities for personalized manufacturing.
What color is the tinplate box?
Usually the color of the printed image is customized. This is indeed one of the possibilities of completion. But it is far from the only one. Tinplate boxes allow all requirements in terms of color. Some models provide variations and the manufacturing process allows transparent windows to be included to make the content visible. This option is especially suitable for gift boxes. You can also choose: galvanized iron gift box, frosted iron gift box, etc.
There are various innovations in all colors, holiday prints, and appearance of tinplate gift boxes. The important thing is to make the right choice for the product you are marketing. Some products are very suitable for red sober. Other products will be more valued because of the exquisite packaging. For example, this is the case with mooncake tin boxes.

What are the options for custom tinplate boxes?
Printing the pattern of your design is a decisive and personalized option. Each tinplate box itself becomes an advertising tool. 3D laser embossing printing more unique tinplate boxes or simple printing personalized patterns: the choice is yours.
The tinplate box is marked with your brand logo and specific mark; make the most consistent decision on the type of product sold. You can include text, addresses, and phrases that represent you. The possibilities are endless. Here, you can also diversify your tinplate box packaging and adapt it to your customers.
The ideal printing method for tinplate boxes is to choose water-based ink and four-color printing process. They are recyclable and reusable, and meet environmental protection requirements. You will be able to choose the number of colors to use to achieve the level of personalization and quality you want.

More: Tin Can Making Machine

7 Ways to Reduce Packaging Costs-tinplate Boxes

The main function of packaging is to protect products from being damaged by external forces during transportation; each product is transported using packaging. Whether you have just established a new company and are looking for lower-cost packaging, or are a mature packaging box manufacturer, this article is to help you reduce the cost of custom packaging, especially how to reduce the cost of custom tinplate boxes.

1. Check the packaging dimensions of your custom tin boxes to make sure they fit the products they protect and transport.

The principle of protection applies to all products. If you are using a packaging box that requires a lot of filler (more than around), you may increase the cost of packaging. Since most tin box packaging manufacturers have more than 100 kinds of library size molds, you can find the tinplate box packaging of your own size.

2. Choose the correct tinplate box design and style.

A good rule of thumb for tinplate packaging is “the simpler, the cheaper.” If you customize the tinplate box packaging box so that it opens at the smallest size and the largest size is the deepest, this allows the smallest amount of tinplate used to produce the box and the fewer manufacturing processes; therefore, “the simpler, the cheaper.” There are many tinplate box styles available. Standard RSC-style shipping containers are the most common, but if you have a rectangular product, a custom-made tinplate box with a rectangular top cover and gong bottom structure may be more effective and can be made with less tinplate.

Make sure you use a rated (not overkill) tinplate box to transport the weight you want to pack.

There are many grades of tinplate boxes. Tinplate grades ranging from non-test grade to over food grade are common.

3. Industry knowledge is priceless; knowing when the price of tinplate rises or falls can make you better negotiate with tinplate box suppliers.

Use the Internet, social media, magazines and other resources to obtain industry news and tinplate pricing online. When the price of tinplate drops, asking for a better price will save you a lot of custom tinplate box costs. If the price of tinplate increases, your tinplate box manufacturer should notify you and allow you to pre-order before the effective price increase date.

4. Replace tinplate box manufacturers to get some competitive prices.

The Internet is very suitable for purchasing retail products, but not for industrial products. You still need to find a good local tinplate manufacturer and ask them to quote. You want to be a customer whose tinplate box salesperson knows that just mentioning a price increase will buy the price. Business relationships do exist, but friendly competitiveness can greatly help reduce packaging costs. Coupled with the introduction of a second supplier, you can provide a backup supplier and take a fresh look at your process. In many cases, the cost is saved by changing the packaging method or the size of the box.

5. Change tinplate box packaging to reduce transportation cost.

We know that this is not entirely about saving the cost of the shipping box, but if you can reduce the weight of the box by changing the packaging method, so as to reduce the single transportation cost. In addition, changing the box size to allow more products to be placed on the pallet can increase the total amount of products transported, and the entire vehicle can even reduce the shipping cost of each product.

6. A large number of customized tinplate boxes can reduce the unit price.

Most tinplate box manufacturers calculate the price in square meters per roll of tinplate. The printing of tinplate boxes requires a minimum order quantity, the more the quantity printed, the lower the unit price. The price reduction may reach 3-10%. If you want to order between 3000 and 10000 boxes, you will find that the price of 3000 can be 3-15% higher than the price of 10000 boxes.

7. On-time inventory and a blanket purchase order during the period of use.

Many packaging distributors will store your customized packaging boxes for you according to a blanket purchase order agreement, and distribute them when you need them. This will allow you to buy more quantities (usually at a lower cost) and receive boxes as needed. This should sell at a lower price and keep your cash flow and inventory constant, because you should only pay for the goods when you receive them.

More: Jiujiang Yixin Technology Can Making Machine

Why Can Tinplate Cans Be So Popular in All Major Industries?

With the advancement of science and technology and the improvement of people’s living standards, people’s vision of pursuing new things is getting higher and higher. The outer packaging of items is no longer a way of thinking that you can pack things before. People are more inclined to the quality and beauty of the outer packaging of items. In order to adapt to the changes of the times, the design of the tin can is also very novel and unique, which can meet the requirements of each business.

Although the price of tinplate can packaging products is a bit more expensive than other packaging products (such as plastic products, wood products, paper products, glass products, etc.), they are cost-effective, high-quality, and elegant in appearance.

As iron can packaging containers to withstand various mechanical processing during the production process, they must adapt to the requirements of factory mechanization and automated production, while at the same time having high efficiency, stable quality, low cost and meeting the requirements of modern production management. The iron cans that have undergone mechanical processing will not only have strong rigidity, but also have enhanced sealing properties. Because iron itself is opaque, iron cans are the most reliable for storing food.

There are various printing styles and shapes of tin cans. It plays an important role in promoting product sales.

Gift industry: attract customers with unique and charming appearance and exquisite patterns, especially when giving gifts, gift packaging is very important, a simple detail can reflect one’s taste, so choosing customized gift packaging will let you The products are more attractive.

Tea industry: The storage requirements of tea are very high. It must be dry and not exposed to strong light. In short, it should be stored as little as possible in contact with the air, otherwise it will easily deteriorate due to moisture absorption. The reason why many tea manufacturers use tinplate cans for tea is because tins made of tinplate are not only rigid, but also tightly sealed, which can retain the fragrance of tea for a long time and prevent the tea from contacting moisture and oxygen in the air.

Snack food industry: Tinplate snack cans come in many shapes, such as square, round, special-shaped (heart-shaped, lip-shaped, spherical, car-shaped, oval, etc.). Usually, special-shaped snack packaging cans are the most attractive. Alien shapes are relatively rare in life, and they are rare and expensive. Therefore, the use of special-shaped iron cans for snack packaging can greatly increase sales.

What Are Tin Cans Made Of?

Tinplate cans (tin cans) are considered to be one of the most popular packaging materials in the world. These small tin cans are easy to manufacture and inexpensive, and can be made in any color, shape and design. Although the names may imply different, these cans are not actually made of tin. So, what is the tin can made of?

Tin cans-what are they made of?

Although empty cans are often referred to as “tin cans,” few modern tin cans are produced entirely from tin cans. The main reason people call these empty cans “cans” can be traced back to the late 20th century. At that time, the tank was made of tin-plated steel with the purpose of combining the strength and endurance of steel with the corrosion resistance of tin.

Nowadays, generally speaking, empty tin cans are made of any thin metal. The range is from aluminum to steel or iron. Although this is not always the case, these small tin cans are usually tinned. Since the 1960s, aluminum has so far become the first choice for the production of small tin cans. The reason behind it is that it is cheaper and easier to form. As a result, the manufacturing process has become cheaper and less time-consuming than before. As we all know, aluminum has the same corrosion resistance, so it is an ideal substitute.

The reason why an empty can cannot be made entirely of tin is, in fact, tin is a very rare material. Although it is considered a “common metal” and not a “precious metal” like gold or platinum, its availability is still less than you might think. In fact, tin may also be one of the least “common” metals in there. Indeed, the number of tin mines in the world is limited. Scientists even predict that in the future, we may completely run out of tin.

For the reasons mentioned above, it would be very expensive and difficult to make anything with pure tin. This is especially true for everyday items (such as packaging materials). As of today (2018), the price of tin is US$20.61 per kilogram, while the price of aluminum is only US$2.1 per kilogram. (2018) As you can imagine, this major price difference leads to the fact that manufacturers would rather use different metals to produce tin cans. Most of the empty cans produced today are made of aluminum or other cheap alloys.

Traditional tinned cans

The only product produced by pure tin is tin foil. This material is usually used for scientific experience, but can also be used to wrap other objects, such as chocolate bars. Because tin can be squashed in a very thin sheet, it allows us to create a large amount of “plating” with only a small amount of tin. In addition to making tin foil, this coating is often used in traditional containers. It is estimated that one pound of pure tin can produce up to 12.08 square meters of tin foil or tin plating. (2018) For this reason, tin has become very popular in electroplating and is often used in pure metal cans.

In addition to the fact that tin can be easily leveled, there is another reason to use it as a plating material. Tin does not interact with oxygen-therefore, it does not rust or discolor, and it is highly resistant to corrosion.

Today, we use most of the tin in the world to produce tinplate cans. These empty cans are mainly made of tinned steel or iron. Therefore, all can only be composed of 1% or 2% tin. This forms a coating on the metal to protect it from the elements. Because of its protective function, the coating can be used for a large number of commercial items, such as tin cans and other packaging.

Tin cans are mainly used for the storage of canned food, cosmetics, medicines and candles in the form of candle jars. Ordinary metals usually react with the acids present in these substances, and then they begin to corrode. Once this happens, the can will release molecules that may contaminate the contents of the package, and it will destroy the can itself. In the past, this especially caused problems with lead packaging. As we all know, these jars leach harmful toxins out of them. However, due to the acid resistance of tinned metal cans, food, cosmetics and medicines can be stored for a longer period of time, which is completely safe. The only disadvantage of traditional tinned cans is that they are much heavier than aluminum cans.

Modern tin can

Generally speaking, tinned cans are considered the “traditional” way of producing cans. In today’s world, the vast majority of small tin cans sold are made of aluminum or different types of processed metals. Any material is suitable as long as it is easy to form and resistant to rust and corrosion. Both traditional cans and modern cans are very suitable for canning purposes and can also be recycled. Therefore, manufacturers can strip the tinplate layer and reuse the iron or steel for scrap metal.

More: Can Making Machine