What are the functions of tinplate inner coating?

What are the functions of tinplate inner coating?

(-) Coating purpose and requirements

Tinned plate, chrome plated and aluminum alloy thin plate made of cans are susceptible to corrosion and cause the contents to deteriorate. Therefore, most food cans require coatings inside the cans. Different food cans have different coating requirements.

  1. Purpose of coating

(1) Protein-rich aquatic products, poultry and meat cans use anti-sulfur coatings to prevent sulfidation corrosion caused by thermal decomposition of proteins, such as vulcanization spots and iron sulfide.

(2) The acidic tomato sauce and pickled cucumber adopt acid-resistant paint to prevent acid corrosion of the cans and ensure that the canned food has a certain shelf life.

(3) Certain anthocyanin-containing fruits, such as strawberries, cherries, and bayberry, use general coating material to prevent anthocyanins from corroding cans and contents from fading due to tin reduction

 

(4) Steamed fish and luncheon meat are easy to stick to the cans. The coating containing anti-sticking agent makes the contents easy to pour out and keep the shape complete and beautiful.

(6) Canned beer coating material is (spraying after weaving) to eliminate pores and prevent iron ions from dissolving, which affects the flavor and transparency of beer.

  1. Coating requirements

(1) The coating should be non-toxic after film formation, without affecting the flavor and color of the contents.

(2) After the coating film is formed, it can effectively prevent the contents from corroding the cans.

(3) The coating has good adhesion after film formation, has the required hardness, punch resistance and solder heat resistance, etc., which can meet the requirements of can making process.

(4) After sterilization of the canned product, the coating film will not change color, soften and fall off.

(5) Convenient construction, simple operation, and a good coating film can be formed after drying.

(6) The coating material and solvent price are cheap.

(7) The coating material has good storage stability.

Tips for making tinplate lids

Tips for making tinplate lids
The selection of can lids making equipment should first consider product specifications, output scale, quality requirements, followed by is equipment costs, labor costs, operating costs, plant conditions and other factors.
Generally speaking, for the production of metal covers with few specifications and varieties, large output, and high quality requirements, equipment with high production efficiency and high degree of automation should be selected, such as various types of multi-function combined machines configured as automatic production lines. Due to the small specifications, it is not necessary to change molds and debugging equipment frequently, and it is easy to take advantage of the large-scale production of high-speed automatic production lines to avoid the damage caused by the handling of semi-finished products in the semi-automatic production process. At present, more advanced lid-making equipment can be provided in China, such as corrugated plate shearing machine, double-head automatic punching machine, glue injection drying combined machine, etc. For the production of special-shaped lids with quality requirements, it is best to choose a full lids curl machine to improve the sealing quality. The small size special-shaped cover can be directly selected the automatic curl & glue lining combined machine.The large-size special-shaped cover lining machine is relatively in low production speed. So, For large-size lids lining can use multi-gun semi-automatic lining machine or automatic lining machine. The dryer can be preferred to use a vertical dryer, and its drying quality is better than that of tunnel dryer. For products with many specifications and a lack of large quantity demand, and the production of metal covers with general quality requirements, you can consider choosing multiple semi-automatic stand-alone equipment.On the one hand, you can reduce the number of mold replacements and machine adjustments.On the other hand, you can also reduce the equipment. Investment costs. The rounded edge of the special-shaped cover can be considered to use half-curl or full-curl. As far as possible, the glue injection should not use the printing glue that is facing elimination. The tunnel dryer is suitable for any size and shape of metal cover, but it covers a large area and has high energy consumption. The drying quality is not as good as the vertical dryer, and it needs manual loading and unloading. The aluminum easy-open cover has fewer varieties and specifications, but the output is extremely large, so it requires a high-speed large-scale automatic production line, which is not yet available in China. The current demand for tinplate full opening is relatively small. The production capacity of domestic production lines has reached more than 80 pieces / min. The product quality also meets the requirements for use. Compared with similar foreign products, the price is low and should be preferred.

How much do you know about tinplate cans?

(1) Classification by material

Can be divided into two major categories of steel and aluminum. The steel series mainly includes low-carbon thin steel plate, tin-plated thin steel plate, chrome-plated thin steel plate, aluminized thin steel plate, galvanized thin steel plate, etc .; the aluminum series mainly includes aluminum alloy thin plate and aluminum foil.

(2) Classification by material thickness

For plates and foils. The sheet is mainly used for manufacturing packaging containers, and the foil is mainly a component of the composite material.

 

The development history of metal packaging materials

The application of metal packaging materials began in 1200 AD. At that time, Bohemia, Czechoslovakia produced tinplate, but its production technology was not spread until 1620, when the Grand Duke of Southern Germany obtained the technology. Metal packaging has only begun to be widely used. In the latter part of the 17th century, people began to use tinplate to make metal buckets to hold dry food. In the 18th century, people began to use food cans to store food. In 1809, a chef and confectioner Nicholas Appert in Paris invented a can storage method, that is, to put food in a wide-mouth bottle, cover it with a cork stopper, give enough temperature to heat sterilize and remove the air, then seal Method can save food for a long time without corruption. In 1810, the British Peter Durand invented the technology of storing food in tin cans using the above principle, and tin cans were born. Before the Second World War, with the improvement of rolling technology and the invention of metal can making machines, the output of tinplate increased greatly. After the Second World War, due to the shortage of tin resources, in order to save tin, people developed tin-making materials or tin-free tin-making materials. As a result, poor-thickness tinplate, low-tinplate, and tin free thin steel plate came out one after another. In the 20th century, with the improvement of aluminum metallurgy technology, the improvement of rolling technology and the appearance of aluminum foil, aluminum began to be widely used in the packaging industry.

In recent years, the can-making technology has developed rapidly. It started as a three-piece can consisting of three parts: the can body, the can bottom, and the can lid.Later, the can body and the can bottom joined together and the can lid was composed of two parts. Tablet cans. The traditional three-piece tin soldering can uses tin-lead solder to weld the seam of the can body, which consumes much tin, and the lead content in the solder can contaminate the built-in food. With the appearance of tin free thin steel plate, people have successfully developed seam welding process. The process of seam welding cans is based on contact resistance, electric heating and melting, and then applying pressure to weld the can body. Later, there emerged a bonding can, which uses organic adhesives to bond the can body seam making process. Both of these methods eliminate the pollution of lead to the food in the can, and solve the problem that the tin-free steel plate cannot be tin-welded. They are widely used in the packaging of beer and carbonated beverages. The modern and advanced three-piece can manufacturing methods mostly use the seam welding method and the bonding method. It has broad development prospects, and tin solder cans have been eliminated in advanced countries such as Europe, America, and Japan. With the widespread use of aluminum in packaging, two-piece cans have appeared. Its structural integrity is strong, easy to decorate and print, and soon occupied the beverage packaging market. However, the production of aluminum consumes a lot of electric energy and its high price limits its usage. However, with the continuous improvement of the can-making process, two-piece cans have been successfully produced using tin-plated thin steel plates and tin free thin steel plates, and automated production lines have been used in industrial production to greatly improve the efficiency of can-making( It can reach 400 cans / min; the production speed of two-piece cans can reach 800-1200 cans / min), so the application prospect of metal cans in packaging is still very optimistic.

Which materials are better for the packaging of tea tin cans?

In the tea market, tinplate cans are what consumers are most keen on, so which materials are better? We understand from the following points.

Main properties of metal packaging materials

(1) Advantages

①The metal packaging material has high strength. Therefore, the wall thickness of the packaging container can be very thin, so that the weight is light, the strength is high, and it is not easy to be damaged.

For storage and transportation, it has good protection for commodities.

②The metal packaging material has an unique luster, which is convenient for printing and decoration, and makes the appearance of the product beautiful and gorgeous. In addition, metal foil and gold-plated film are ideal trademark materials.

③Metal packaging materials have good comprehensive protection performance. Metals have low permeability to water and gas, and are opaque, which can effectively avoid harmful effects such as ultraviolet rays. It has good comprehensive performance and can maintain the quality of the goods for a long time.Some packages are valid for up to two years.

④ Metal packaging materials are rich in resources and have good processing performance. The recoverable amount of steel on the earth is 1294 × 10 ° t, ranking first, followed by aluminum, which is 68 × 10 ° t. Metal packaging materials can be processed with different methods to produce containers of different shapes and sizes.

⑤The production of metal cans has a long history and the process is relatively mature. Now it has automated production and high production efficiency.

2) Disadvantages

①Pb and As in metals and solder easily penetrate into food and contaminate food; in addition, metal ions will also affect the flavor of food.

②When the metal container uses phenolic resin as the inner wall coating, if the processing technology is improper, it will also affect the quality of the food.

Main properties of several major types of metal packaging materials

(1) Steel

With rich steel resources and low production costs, it ranks first in metal packaging materials. The main properties of steel used as packaging materials are good comprehensive mechanical properties and certain corrosion resistance. In order to meet the requirements of comprehensive mechanical performance, the packaging steel plate mainly uses low-carbon thin steel plate, which is used to manufacture containers, ordinary steel drums, and can also be used as a strapping material, which is widely used in transportation packaging. In order to ensure the requirements of corrosion resistance, tin, chrome, aluminum, galvanization and the application of corresponding coatings can be carried out on the basis of low-carbon thin steel plates to improve their corrosion resistance. Can also be made into sales packaging containers, widely used in food, medicine and other packaging

Why do biscuits generally use tinplate cans?

People’s life and production are inseparable from packaging, because packaging has multiple functions. Why do biscuits generally use tinplate cans? Can we understand from the following aspects?

(1) Protection function. The protection function of the packaging is the most basic and the most important function. It should protect the product from damage and loss. In the circulation process of goods, the factors that cause harm to them are: environmental conditions, such as temperature, humidity, gas, radiation, microbial insects, rodents, etc., which may damage the packaging and harm the product; human factors, the goods are transported, During storage, due to careless or improper operation, the goods are damaged by shock, vibration, or fall, or they are crushed due to too many stacked layers. Therefore, according to factors such as the shape, characteristics, transportation environment, sales environment and other factors of different products, the most appropriate materials, reasonable design of packaging containers and technologies should be given to the packaging to provide sufficient protection functions to protect the safety of the products inside, and the special use of dangerous goods Packaging, pay attention to prevent its damage to the surrounding environment and people and creatures.

(2) Convenience function Modern product packaging can bring many conveniences to people, which plays an important role in improving work efficiency and quality of life. The convenient function of packaging should be reflected in the following aspects.

①Convenient production For mass-produced products, packaging should meet the needs of mechanization, specialization and automation of production enterprises, taking into account resource capacity and production costs, and increase labor productivity as much as possible.

②Convenient storage and transportation For the quality and volume (size, shape, etc.) of each packaging container, the convenient loading and unloading of various transportation vehicles should be considered for stacking; also consider that the quality of manual loading and unloading of goods generally does not exceed 40% of the worker’s weight (limited to about 20kg), etc .; at the same time, it should also consider the storage and stacking method of storage and transportation into warehouses, shops, and residences during circulation Indoor decoration and storage during the process.

③ Convenient use of suitable packaging should make consumers feel convenient when opening, using, storing and storing. Such as carton sealed with adhesive tape, cans, spray packaging, portable packaging, etc., in a concise language or icon, to explain the precautions and methods of use to consumers to facilitate the use.

④Convenient handling means that some packages have the function of repeated use. For example, the recycling of various materials, glass bottles for beer and beverages, and the recycling of packaging waste (paper packaging, wooden packaging, metal packaging, etc.) are convenient for environmental protection and conducive to resource conservation.

(3) Selling functional packaging is like a silent salesman. Good packaging can attract consumers ‘attention and stimulate consumers’ purchases. The sales function of packaging is achieved through packaging design. Excellent packaging design, with its exquisite shape, reasonable structure, eye-catching trademarks, decent text and bright colors and other artistic language, directly stimulates the purchase desire of the consumer lunch, and leads to purchase behavior. Some packaging also has potential value, such as beautiful and suitable packaging containers, which can be used to hold other items after the contents are used up. Uniquely shaped containers and beautifully printed decorations can not only increase the selling price of goods, and promote the sale of goods. At the same time, it can also be collected as an art appreciation.

 

How to choose canning machine and sealing machine?

How to choose canning machine and sealing machine?

(1) Technical requirements for selecting canning equipment

① Whether the sealed tank is an empty tank (open top tank) or a solid tank.

② The shape of the sealed can body and lid.

③ The annual output of the tank (and converted into shift output or output per minute).

④ The size range of the sealed tank (the range of tank diameter and tank height).

⑤ If it is a solid tank, you also need to know the contents and vacuum requirements.

(2) Determination of the type and main parameters of the canning equipment According to the two requirements (1) and (2). in (1), the type of equipment used can be determined.

If it is an empty can or a solid can sealer, whether it is a round can or a shaped can, or whether the shape of the can body and the can lid are consistent. Especially when the shape of the can body and the lid are inconsistent (such as an embossed can), the type of can sealer should be determined according to the shape of the can lid, that is, a canned can or a round can sealer, and then according to the can body The shape of the tank requires the necessary modification of the transport system of the tank body (in general, the design of the tank sealing equipment considers that the shape of the tank body and the lid are consistent, and the difference is only in the size of the tank lid) according to (3) and (4). Two requirements, determine the adaptation range and production capacity of the selected equipment (also consider the matching with the production capacity of other equipment on the production line).

  • Selection of the structure and layout type of the can sealing machine

The actual can sealing machine is usually only vertical due to the need to fill the contents. Empty can sealing machine has horizontal. The distinction between vertical and vertical can be determined according to the working attitude of the can body and the can conveying equipment of other supporting equipment.The horizontal can sealing machine often needs to raise the can body to a higher position, and then rely on gravity. The guide cage dumps the can body to a horizontal state and conveys it to the entrance of the can sealing machine. The vertical can sealing machine does not need to raise the can body, and can use a conveyor belt (or chain) to directly convey the upright can body to the can sealing machine inlet. At present, most of the high-speed can sealing machines are vertical. The vertical can sealing machine has a compact structure and is convenient for maintenance and debugging. It should be given priority when selecting. In the vertical tank sealing machine, whether to choose the sealing wheel type or the track type, the characteristics of the two should be analyzed first. The track type combined machine has a compact structure and a small footprint, but the sealing track is difficult to process, requires high accuracy, and has a high manufacturing cost. At the same time, different tank types cannot be shared. The sealing wheel is simple to process and easy to ensure accuracy.Several tank types can often share one type of sealing wheel, the manufacturing cost is low, and the maintenance and adjustment of the machine are easy and simple.As can be seen from the respective characteristics of the two, the rail type can sealing machine is more suitable Workshop space is limited, and companies that change tanks infrequently use it. In general, more sealing wheel sealing machines are used. The combination of the advantages of the two can sealing machines also has the form of a sealing wheel combined machine, but there is no such product in China. Under the same conditions, the canning machine in the rotating form of the can body should be preferentially selected.The sealing roller of this canning machine can be arbitrarily adjusted with the swing arm, so the diameter of the sealing roller remains unchanged when the tank diameter changes. This allows different tank types to share the same sealing roller. The sealing roller of the eccentric feed can sealing machine can only be adjusted slightly. When the tank type is changed, the sealing roller must be replaced. In the tank body non-rotating can sealing machine, the four sealing roller types are preferred (two for each of the first and second sealing rollers). Because there are many sealing rollers, the crimping quality is high.

(4) Selection of canning machines with different degrees of automation Generally, automatic canning equipment should be selected for large-scale production, and the quality of automatic equipment is stable.

It is not affected by human factors, and the labor intensity of workers is small, and the production capacity is large, so it is more used. For small batches and limited funds, a semi-automatic can sealer can also be used. When the output is not reached, multiple units can be used. Manual can sealing machine is generally only suitable for laboratory use, used for testing can sealing, can also use this can sealing machine to make some sample cans as trial marketing products, so that less investment can be used for market analysis first.

(5) Selection of solid tank sealing equipment In addition to the requirements of vacuum degree, whether to fill with carbon dioxide gas, etc. when selecting solid tank sealing equipment, it is also necessary to consider whether the contents will overflow during the sealing process. Whether the materials are resistant to corrosion and meet food hygiene requirements. Priority should be given to the filling and sealing machine, the reliability of such equipment should be higher than the split equipment, and the cost is lower.

(6) Selection of spray can sealing equipment Spray cans are different from empty cans, and both ends of the can body need to be sealed. So when choosing canning equipment

There are two options. One is to use a horizontal necking, flanging and sealing combined machine.This equipment can simultaneously complete the necking of the tank body and the sealing of the top and bottom cover.It has a compact structure, but its production capacity is low. 60 cans / min, double heads are 120 cans / min; the other option is to use two can sealers to crimp and seal twice, and add a can pouring device and conveying equipment between the two devices.

   Factors affecting the quality of can making

Factors affecting the quality of can making

There are many factors that affect the quality of empty tanks. The quality of materials (including all raw and auxiliary materials), the equipment status and working conditions of each process, as well as the technical level of operators and packaging and transportation have a great impact.

(1) Influence factors of empty tank preparation equipment on the quality of empty tanks. The factors that affect the quality of the cutting board mainly include the positioning accuracy when cutting the board.

And whether the cutting edge clearance is appropriate, the cutting edge is worn. The positioning accuracy of the cutting board is not enough, and the geometry of the cut piece will be inferior. For the gap of the cutting edge, if it is too small, it will be easy to damage the cutting edge. If the cutting edge is too large, it will produce burrs and affect the life of the cutting edge. The quality problems caused by the scribing are mainly the consistency of the scribing depth and the parallelism of the scribing and the edge of the sheet. The radial and axial runout of the scoring blade, the deflection of the guide rail, and the inconsistent size of the blanks will cause the above quality problems.

The quality problems that occur in scraping yellow are incomplete yellow scraping or excessive scraping, which will damage the tin plating layer, and then affect the welding quality. The main reason is the wear of the cutting edge, chipping and the pressure adjustment.

(2) Influencing factors of can body forming and welding equipment on the quality of empty cans In the can body forming and welding equipment, the quality of the plate and the quality of the copper wire, forming, conveying, welding and other processes, insulation, cooling status, etc. will affect the quality of empty tanks.

①Material quality includes the material of the tank body, cutting accuracy and the quality of the copper wire. Mainly the composition of the plate, the amount of tin plating, the degree of quenching and tempering and its uniformity, the thickness of the error surface quality and so on. Copper wire purity, wire diameter tolerance, elongation, surface quality, etc. The dimensional accuracy of the blank angle deviation, the size of the burr, etc.

②Effect of molding The effect of kneading the iron (releasing the surface tension) into a round opening will affect whether the subsequent transportation is smooth.

③ The impact of transportation is not smooth, and the finish of the contact with the tank is not high, which is easy to cause abrasions. The uneven position of the jaws can easily cause welding.

④ The influence of welding includes the adjustment of the sizing gauge itself, the size and relative position of the sizing gauge, the upper and lower welding wheels, and the Z-shaped guide rail;

Adjust the width after flattening, welding pressure and welding current, and match them.

⑤ Other factors affect the reliability of the insulation parts, the temperature and flow rate of the cooling water.

(3) The effect of supplementary coating and drying on the quality of empty cans The coating selection is not suitable, the thickness of the coating is uneven, the width is uneven, and the coating film is too thin

There is exposed iron at the coating, the weld spatter is too large, and the weld overlap is too thick, which is not conducive to repair. If the drying time is not enough, the coating is not completely cured, or the temperature rises too fast, forming air bubbles, and the drying temperature is too high, which causes the tin layer of the can body to melt and the coating film to burn, which will affect the corrosion resistance of the can body.

(4) The influence of beading and slitting on the quality of empty cans. Beading are prone to produce sharp edges, and the oxide layer and coating film at the weld seam of the tank body are broken.

Bad, the can body is scratched. The slitting machine is prone to uneven cuts, end-to-end contact, and abrasion of the tank body. The above phenomena are directly related to the accuracy of mold or tool manufacturing, wear and tear, and installation and adjustment.

(5) The effect of necking and flanging on the quality of empty cans. Necking is prone to wrinkles, uneven necking, abrasion, and difficulty in demolding. Flanging is prone to uneven width, excessive or insufficient flanging, inconsistent ends, flanging damage, cracks at the weld, etc. The main reasons for the above phenomenon are: the mold dimensional accuracy is poor or worn, there are problems with the installation and adjustment of the mold; the ends of the weld are too brittle, there are too long tongues, and the cutting size is not accurate.

(6) Factors affecting the drawing quality of two-piece cans The factors affecting the drawing quality of two-piece cans include the pressure of the blank holder ring, the radius of the fillet radius of the concave-convex die, the choice of the lubricant, the drawing coefficient, and the drawing process The pressure applied by the blank holder ring, such as the stress state of the material, must be appropriate and uniform. Excessive friction will increase the friction between the die, which will easily rupture the part; too small will cause the drawn part to lose stability and cause wrinkles. The pressure can be adjusted during drawing until it is suitable. Using reverse drawing or soft die drawing can increase the radial tensile stress and avoid wrinkling.

Tin can making machine price? China tin can making machine price in 2020?

To understand the price of canning equipment, first we need to know what specific canning equipment is required for a complete canning production line. Let us briefly understand the specific equipment.

Three-piece can production line equipment classification: Three-piece can production line manufacturing equipment is divided into cutting equipment, forming welding equipment, drying equipment, rolling equipment, slitting equipment, necking equipment, embossing molding equipment, turning equipment Side equipment, capping equipment, can sealing equipment, leak detection equipment, full internal spray equipment, drying equipment, stacking equipment, packing, etc.

 

  1. Empty can preparation equipment mainly includes: cutting equipment, parting equipment, coating scraping equipment

① Cutting board equipment is used to cut the large sheet of tinplate into pieces of the size required for canning or punching. Its process flow is as follows:

Feeding and cutting → finishing

② Scribing equipment is a device for scoring the uncoiling line or slitting line on the can body blank. Its role is to draw a trace of a certain depth on the cut can body material in order to separate the finished can body from the scribe line.The process is as follows:

Feeder → Single sheet feeding and feeding → marking → selection

Scribing equipment is available in automatic or semi-automatic stand-alone form, as well as in combination with can body welding and forming machines.

③ The coating layer scraping equipment is used to partially scrape the surface coating of the cut can body sheet to facilitate resistance welding (the equipment is not needed to leave the paint plate empty). The process flow is as follows:

Feeder → Single sheet feeding→ Scraping → Stacking

The price of the preparation equipment is about: USD10000-70000

 

Second, can body forming welding equipment

  • Classification of can body forming and welding equipment

The price of can body forming and welding equipment is about: USD10000-50000

 

Third, the can body embossing, expanding equipment

(1) Characteristics of embossing and expanding of the can body The embossing or expanding of the can body can be changed into various cross-section (longitudinal or cross-sectional) shapes.

This can is a fancy can. Pattern cans can be divided into two types: one type is round, which is characterized in that the shape of the mouth of the lid keeps the original shape of the round can, and the middle part of the can can be changed in shape according to user requirements, such as barrels Shape, drum shape, vase shape, square, polygon, cone, etc., this type of can is called an embossing can (shapping fancy can); another type of can is shaped, which is characterized by a non-circular lid shape, and The shape of the can body and the lid are basically the same. Common types of cans are: square, rectangular, polygonal, trapezoidal, pear (horseshoe), oblate, oval, etc. These cans are called irregular cans.

During the expanding process, the shaped cans body was slightly stretched, and the stress on the metal reached the elastic limit of the material. Before the occurrence of resistance welding, the expanding process of the shaped cans cannot withstand such a large expanding force, so the formed shape is not flat. The body of the embossed can has a large tensile force, and the stress on the metal exceeds the elastic limit of the material, and a large tensile deformation occurs. The volume of the tank body after embossing can be increased by about 20% compared with the original can body. Since the embossing can and the new-shaped shaped can both need to bear a large expanding force, only the welding seam (such as resistance welding, laser welding, etc.) can meet this expanding requirement. Because the middle section of the embossed cans has a large tensile deformation, the outer surface of the printed iron and the coating of the inner side have higher requirements to prevent damage to the printing and coating caused by this deformation. In addition to the expanding method after welding, there are also bending methods before welding. This method is often used in the can body soldering process. The can body is directly pressed into a special shape and then the can body is welded.

The price of the embossing and expanding equipment of the can body is about: USD20000-80000

 

Fourth, repair coating equipment

Repair coating equipment is a device that coats the weld with a protective layer that does not damage the contents and is resistant to corrosion. After welding, there is no tin layer at the weld.The inner and outer welds are in direct contact with the contents or the atmosphere and are susceptible to rust.Especially canned foods that have been processed at high temperatures and have long-term storage with high levels of acid and sulfur. There are more stringent requirements, so the inner and outer welds must be repainted. The recoater device consists of a cam body conveying system and a recoater system. The can body conveying system generally has two magnetic conveyor belts, which can continuously, smoothly and accurately feed the can body into and out of the coating area after welding.

The coating equipment is roughly classified as follows:

The price of recoating equipment is about: USD5000-20000

 

Five, drying equipment

The coating applied on the can body must be cured by heating to make the solvent volatilize, so that the monomers can be polymerized and the anti-corrosive performance can be obtained.

Especially for foods sterilized by high temperature, the curing requirements are higher. When curing, the temperature of the surface of the can body must not be higher than the melting point of tin, and the coating must not have blistering or scorching. The curing time must be sufficient. The drying equipment consists of a can conveying system and a heating system. The conveying system generally uses chains, steel belts or belts, etc., with the aid of magnetic adsorption, the cans body is sent into and out of the heating zone. The conveying system is divided into linear conveying and circular conveying, which saves space.

The price of drying equipment is about: USD5000-15000

 

Six, can rolling, parting equipment

The function of the cans body rolling ribs and parting equipment is to roll the reinforcing ribs on the welded can body or cut the can body into two or three sections. A single rolling rib slitting machine cannot complete these two processes at the same time. If necessary, replace the rolling rib die or parting die and configure it as a rolling rib parter or parter. Some combination machines have multiple stations, which can be equipped with different molds at the same time to complete the rolling ribs, parting, flanging, sealing and other processes, the principle is the same.

The price of can body rolling and parting equipment is about: USD8000-30000

Seven, can necking, flanging equipment

(1) The necking machine reduces the diameter of the end of the can body, which can reduce the material consumption of the can lid, and is conducive to stacking storage and transportation of cans.

Beautiful shape. Necking is divided into ordinary single necking, large single necking, two necking, three necking, four necking and so on.

The necking method is divided into a rolling method and a shrinking method. The rolling method is a pure rolling with internal and external mold rotation, while radial feeding. Rolling method can be completed when necking and flanging thin iron necking at the same time, easy to wrinkle. The shrinking method is directly extruded by opening and closing the inner and outer molds with a cone, and is formed in one operation. Adopting multiple necking requirements: necking is even and smooth, no wrinkles, no oxide film and coating film are peeled off at the weld seam of the can body, there is no mechanical wiper or multiple stations for single shrinkage on the inner and outer surfaces of the can body, and a second shrinkable can , Three shrinkable cans, four shrinkable cans.

(2) Flanging machine: Flanging machine is a device that prepares the process of trauma and necking by clearing the two ends of the can body to the edge of the desired shape and size through the extrusion of the flanging die. Flanging methods are divided into crush type, rolling type, spinning type and plate edge type. The crush flanging uses a flanging die to extend from both ends, and hits the edges of the two ends of the can along the axial direction of the can body to form the flanges at both ends of the can body. Rolling flanging and rolling necking are completed in one step at the same time. The principle is the same as that of rolling necking. Spin-type flanging is divided into two types: one is the active rotation of the flanging roller, which has many forms; the other is the driven rotation of the flanging roller, and the two motion principles are the same. The flanging die is composed of a plurality of flanging rollers. The flanging die is extended from the two ends of the can body, and is fed along the axial direction of the can body while rotating. The two ends of the can body are squeezed to gradually complete the flanging. Flanging beads are arranged along the circumference according to a certain rule. The larger the diameter of the can body, the more the flanging roller are, and the deformation is uniform and slow. Therefore, the flanging quality is good, which is especially suitable for high-speed and thin-tin can body flanging. The flanging-type flanging is used for flanging of special-shaped cans. The outer mold holds the can body, and the inner mold moves from the inside to the outside to complete the flanging.

Flanging requirements: The flanging must meet the size, uniform and neat, and there must be no uneven width, excessive or insufficient flanging, cracks (especially at the weld), inward folds and off angles of the flanging, and peeling of the coating film.

The price of can necking and flanging equipment is about: USD8000-30000

The above prices are for your reference. The specific prices need to be determined according to the actual supporting conditions.

What is the price of aluminum beverage can? What is the difference between aluminum beverage can and tin can?

When it comes to packaging, people have given different connotations. In the past, people thought that packaging was the use of appliances to contain items, or the operation of wrapping and bundling items, which merely played a role of accommodating items and facilitating access. This understanding is obviously one-sided. Now people have given a broader meaning to packaging. From a systemic point of view, it links the purpose, requirements, constituent elements, functions, and practical operations of packaging to form a complete concept.

 

The use of aluminum packaging materials has a short history, but because aluminum has its own unique characteristics, it has gradually increased as a food packaging material. The amount of aluminum used in aluminum foils, tubes and containers in China accounts for 2% of aluminum production. The main properties of aluminum are light weight, non-toxic, tasteless, beautiful, good processing performance, and shiny surface. In addition, because a dense alumina film can be formed on the surface of aluminum, it can effectively isolate the contact between aluminum and oxygen, and prevent further oxidation of the aluminum surface. However, it is corrosive in acid and alkali salt media, so almost all aluminum containers are used after spraying. Its strength is lower than steel, and its production cost is higher than steel, which is about five times that of steel. Therefore, aluminum is mainly used for sales packaging. For example, aluminum cans are mainly used for packaging of aerated drinks with a certain internal pressure. A small amount is used for transportation packaging.

Please visit: www.jxblet.com  for the price of aluminum cans.

What is the difference between aluminum beverage can and tin can?

Iron cans and aluminum cans are currently widely used, each with its own advantages.Z、 However, the current market for tin cans is more popular and advantageous.

The cans are made of aluminum alloy, and the inner wall is coated with some organic coating to isolate the aluminum alloy from the beverage. During the processing, it is inevitable that the protective coating is not applied or is too thin, so that the aluminum alloy on the inner wall of the can comes into contact with the beverage. The aluminum element gradually dissolves in it, especially when the can is filled with acidic or alkaline beverages.

Canned beverages should not be used often and often, especially children with strong growth and poor elderly excretory function, it is better to drink less. Refining aluminum cans can cause pollution. Aluminum cans are passivated and cannot be dissolved by ordinary weak acids.

Aluminum cans are generally coated with a protective layer on the inner wall. Acid substances generally do not erode aluminum cans during the shelf life, but if the shelf life has passed, it may not be necessary. If it is stored for too long, an acidic substance reacts with aluminum to cause aluminum ions to enter the beverage in large quantities. Aluminum will accumulate too much in the body, which will cause Alzheimer’s disease.

What is tin can? What is the tin can price? What is the profit of tin can?

TIN CAN is also called a seam tank. It consists of a can body, a can lid, and a can bottom. The materials used are mainly tin-plated sheet steel (tinplate and chrome-plated sheet steel).

TIN CAN is widely used in the canning industry as well as in other industries such as chemical industry and daily necessities. Their structures are the same, but they are different according to the requirements of use, or the structure is appropriately deformed, or a certain structure is added with appropriate accessories. For example, metal cans used for tea, biscuits, candy, solid beverages, and metal cans containing cooking oil, liquid beverages, and chemical products, are basically the same as ordinary three-piece cans.

TIN CAN has the following functions:

(1) Protection function The protection function of the package is the most basic and important function. It should protect the product from damage and loss. In the process of circulation of goods, the factors that cause harm to them are: environmental conditions, such as temperature, humidity, gas, radiation, microorganisms, insects, rodents, etc., all of which may damage packaging and harm the product; human factors, the goods are In the process of loading, unloading and storage, due to careless or improper operation, the goods are damaged due to shock, vibration and drop, or they are crushed due to too many layers. Therefore, according to the form, characteristics, transportation environment, sales environment, and other factors of different products, the most appropriate materials, reasonable design of packaging containers and technology should be given to the packaging to protect the function, protect the safety of the products, and use dangerous goods. Special packaging, pay attention to prevent its damage to the surrounding environment and people and living things.

(2) Convenient functions: Modern product packaging can bring a lot of convenience to people, which plays an important role in improving work efficiency and quality of life. The convenient functions of packaging should be reflected in the following aspects.

 

① Convenient production: For products produced in large quantities, packaging must meet the needs of production enterprises for mechanization, specialization, and automation, taking into account resource capacity and production costs, and improving labor productivity as much as possible.

② Convenient storage and transportation. For the quality and volume (size, shape, etc.) of each packaging container, consideration should be given to the convenient loading and unloading of various transportation tools and stacking; and the quality of manual loading and unloading should generally not exceed 40% of the weight of the worker. (Limited to about 20kg), etc .; At the same time, it is necessary to consider the storage, stacking methods, shelf display effects, indoor display and storage during consumption in the warehouse, store, and house during distribution.

③ Convenient to use: Suitable packaging should make consumers feel convenient when opening, using, keeping and storing. Such as cardboard boxes, cans, spray packaging, portable packaging, etc. sealed with tape, explain the precautions and use methods to consumers in simple and concise language or illustrations for easy use.

④ Convenient handling: It means that some packages have the function of reuse. For example, turnover boxes of various materials, glass bottles for beer and beverages, and packaging waste (paper packaging, wooden packaging, metal packaging, etc.) are recycled, which is convenient for environmental protection and conducive to saving resources.

(3) Sales function: Packaging is like a silent salesman. Good packaging can attract consumers ‘attention and stimulate consumers’ desire to buy. The sales function of packaging is achieved through packaging design. Excellent packaging design, with its exquisite shapes, reasonable structure, eye-catching trademarks, decent words and bright colors, etc., directly stimulates consumers’ desire to buy and leads to purchase behavior. Some packaging also has potential value, such as beautiful and suitable packaging containers, which can also be used to hold other items after the contents are used up. Specially shaped containers and beautifully printed decorations can not only increase the price of goods, but also promote the sale of goods. It can also be used as an art connoisseur collection.

What is the tin can price? What is the profit of tin can?

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