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.