Common can defects when using a can making machine

If you are working on a processing or manufacturing industry, you must have come through a can making machine. This machine is designated for making cans have different machines integrated together to form a continuous production line. The production line begins by slitting process where a plate is cut into blanks. These blanks are then used for making the can body. After the body is made, necking and beading are done. Finally, there is a seaming process that is very crucial in can production. Can seaming involve joining the bottom part of the can to the rest of the can and sometimes joining the lid with can body.

The processes of seaming involve different operations, and at every single stage, one should be careful as it affects the general shape of the can. There are single and double seaming; double seaming involves several layers mechanically interlocked together to form a seam. As much as this process is smooth, there several factors that has to be taken into considerations. These are:

  •    Conformity of the can body with the bottom or lid specification
  •    The nature of the seaming machine
  •    The condition of seaming rolls
  •    Lifter pressure and other components


A problem arises when one of these factors is not kept in check. These will result in seam defects that are very common when using a can making machine. These defects normally cause leaking of cans thus allowing the external contamination or reduce in shelf life. Here are some of the common defects in seaming:

  • Cover vee- this is a projection of a seam just below the bottom of a normal seam resembling the v-shape.
  • Cover droop- this occurs at the bottom of the seam below the double seam. It is usually a small projection.
  • Cut over-this normally happens at the top of the seam that is inside and is sharp
  • Dead head-also called spinner, it is caused by chuck spinning making the seam to be incomplete
  • Knocked down flange- this is a defect that occurs when the body and cover hook do not interlock due to a bent.
  • False seam-this is a portion of the seam that is not hooked.
  • Long body hook-this is when the body hook exceeds the required specification.
  • Long cover hook- this is when the length of the cover hook exceeds the required specification.

These and many more are some of the defects that are common when using a can making machine during the seaming process. Ensure that you keep the condition of the machine and use the correct material to avoid these common defects. 

Tips for Selecting Tin Can Making Machine

The tin can is one of the most recommended methods of packaging food and other consumer products. They are safe, secure and popular with consumers for the numerous benefits that they come with. However, if you are manufacturing large volumes of products, it would be uneconomical to buy can. Buying a tin can making machine production line is the most recommended. But how do you ensure that you have the right machine? Well, there are various factors that you need to look out for.

The modern tin can making machine extremely advanced in technology which makes the production of the tin can easy and efficient. But there are key attributes that you need to look out for in a can maker machine to ensure that you are getting the most out of your machine. Here are key tips for selecting tin can making machine:

Quality of The machine

One of the critical things that you need to consider is the quality of the machine. Just like any other industrial machines, there are various qualities in the market. But how do you tell the quality of the machine from the inferior once? It is is very easy. First, can making machines are heavy duty machines, and thus you need to consider the kind of material used for their construction. The material used must be durable and capable of withstanding wear and tear for long. It is also important to check the reputation of the consumer.

Ease of Use

The second thing that you should consider is the ease of use of the machine. You must ensure that you are investing in a machine that is easy to use and does not require a lot of technical expertise to operate. Fortunately, technology has made things easy. The modern tin can making machine has most of their functions fully automated or semi-automated. For instance, some of the tin can makers have the entire body can making fully automated. That makes it easy and cheap to run such plants since the level of expertise of the operator may be a little bit lower. Therefore, ensure that the machine you are investing comes with unrivaled ease of use features.


How much space do you have to set up a tin can making plant? Well, space is a critical factor especially if you are renting your premises. The type machine that you pick should take the smallest area possible. Fortunately, the market has everything you need. Due to the level of technological advancement in the construction of these can making machines, they have become smaller and smaller over the time. They are also extremely flexible in that you arrange them in the way that suits you space. Therefore, go for a machine with such flexibility features.


The last thing that you need to check is the cost of labor. You need to know the number of operators needed to run the entire tin can making machine production line. The lesser the number, the lower the cost and the more money you make. But the reduction in labor force must have been replaced by technology for the machine to work efficiently.

Can making machine seaming

A can making machine is made up of a series of process and machines that enable the production of cans. These processes have been integrated to ensure the whole process is smooth and quick. A can making machine can make round cans, mints cans, irregular cans and rectangular cans using a different production line. The general processes of making cans are:

  • Can body making
  • Slitting
  • Beading
  • Top curling
  • Necking
  • Seaming
  • Flanging
  • Bottom making
  • Lid making

In this article, we are giving insights on how seaming is done during the production of cans.

What is can seaming?

Can seaming process involve joining the lid or the bottom to the can body. At times the lid and bottom, unlike the rest of the body is made of steel as a preventing measure.  Seaming a can should be done in such a way that the final product will be leak proof. Normally this process is done mechanically by overlapping two layers to create something like a hook. Under different conditions, different parameters have to be taken into account to ensure the “hook” meets the required standards.

Under double seaming, a seam is obtained by interlocking five materials; two layers done on the can body and three in the lid. Double seaming depends on several factors that include quality of seaming machine, the condition of seaming rolls, lifter pressure and others.

The overall shape of the double seaming is usually determined by the shape of the relative position and the roll profile. During this process, the seaming machine holds the can body as the roll is rotated around. In the first instance, the roll will fold the lid when during the second instance the roll will tighten it forming a seam.

To avoid problems, you should be careful when making the first operation of folding the lid or bottom to avoid issues like leaks and wrinkles. As much as the first operation determines the shape of the final product, parameters such as relative distances, position, pressure and lifter height should also be taken into account.


Apart from making cans, seaming applications include:

  • Automotive filter
  • Capacitors
  • Drums
  • Automotive mufflers

When choosing a can making machine, it is good to take into account the shape of the cans you want for your application. These machines come in various sizes with different features. It is also good to get a machine that has processes integrated into one for quick production.  

Factors to Consider Before Using a Can Opener

Although can openers are usually simple devices to operate, there are few major safety issues that one should consider before buying one. While it is crucial for everyone, it becomes more sensitive where children and elders are involved in using them. Can making machines manufacture tins with different types of lids. Opening or closing these lids, therefore, require the aid of a can opener to retrieve the product packed inside. Below are some of the tips that you should emphasize before purchasing a can opener.

Type of edges created by the can opener

Among the major risks that people face when using can openers are the sharp edges formed after cutting open the can lid. It is more dangerous if the opened cans are at any point to be touched by little kids as they can cause serious injuries. It is therefore vital to focus on can openers that form smooth edges which often cut from below the upper rim other than cutting directly into the lid. There are also some improved models of can openers in the market that allow the removal of the lid other than cutting it. For guaranteed safety even when using openers that cut smooth edges, it is important to avoid touching the lids with bare hands as there may be some sharp endings that are not visible.

Locking mechanism

It may not seem crucial, but having a can opener that ensures a tight lock is a key safety feature. Can openers with a poor grip may easily slip off while locking the can which can cause the scrapping of your hands. It is, therefore, necessary to consider the models that create a secure lock to prevent any chance of injuring your hands. The locking mechanism is a feature that many may ignore when purchasing a can opener but it ensures safety when locking the cans. But that depends of the materials used for constructing the can. Tin cans are a nit a big problem.

Mode of turning

A good can opener should have a knob that can easily turn while using it. An opener with a knob that is hard to turn may force the user to exert a lot of pressure which may result in accidents such as slipping off and hurting from the can. An easy opener knob preserves the amount of strength used thereby avoiding arm aches. However, the strength used should also be measured depending on the material tin cans are made from.

The strength of the opener

Depending on the type of product being packed, some cans are made from a very strong material or reinforced with pressure to avoid damage. Can maker machines may also manufacture strong and tight lids that may prove difficult to open. Such lids require strong can openers to handle them properly as weak ones can break and result to safety issues such as deep cuts or scrapes. But you must ensure the material used can withstand extra force.

Can Production Line

Use of tin cans dates back to the World War II; this is where large quantities of beer were shipped to the servicemen overseas. Since then, use of can has been commonly used primarily for filling beverages and selling food products before sale. The initial cans were made of steel but over time aluminum material was incorporated that prevents the galvanic reaction between the product and the can. The manufacturing process of a tin entails several steps that integrate together to form the final item. Here are the steps involved:

Cutting the Blank

Wall ironing and two-piece drawing is a conventional method of making cans that have been employed by most companies. The first step in the tin can manufacturing process is can maker machine cutting the blanks from the metal plate. Usually, this process begins with aluminum ingot that measures about 30 inches being rolled to form a thin sheet. The next step is to cut the thin sheet into circles called blanks that will make the body and the bottom of the can. During this process, about 12 to 14 percent of the sheet is wasted, but it can be used later as a scrap.

Redrawing the cup

The next step in the can production line is to redraw the cup. The small cup from the initial draw is moved to the second station where a sleeve precisely holds the cup, and the lower end is punched swiftly into the cup. The punch pushes this cup against three iron rings which stretch and thins the cup walls. Drawing and ironing operation happens under continuous punch stroke and takes a short period. Then there is another punch that presses the base of the cup making it bulge inside. The lower walls and the bottom should be made slightly thicker to increase the strength.

Trimming the ears

The process of ironing and drawing can leave a slightly curved at the top. These small ripples called ears that are unavoidable. Trimming is then done at the top end of the can to make the upper walls level and straight.

Cleaning and Decoration

After obtaining a smooth and shiny outer wall, there is no need any other finishing. The can is cleaned and then printed with labels. After this, the can is then decorated, and the upper top is slightly squeezed with the necking machine. Then it is then flanged outward at the top so that it can accommodate the lid.

The Lid

A lid for the base is mostly of different material from the body. The inward bulge made at the bottom will help the can withstand pressure from the products inside. A lid should also be stronger and stiffer. The center of the top is usually stretched upward with a machine to create a rivet. The cans are then checked automatically for any leakages or cracks.

Filling and Seaming

After the can is checked, it is ready to be filled with the desired products. The can is held tightly as the beverage is poured in then the lid is added. The upper flange initially formed is then bent around and sealed.

What You Need To Know About Tin Can Making Production Line Machines

The tin can making production line machines come in various forms and types. The machines are made from top quality as well as attested raw materials to meet your requirements.

In fact, the machines have the current cutting-edge technology to enable you to stay abreast with other competitors in the market. In general, the machines are designed to skillfully provide you with a number of advantages over other types of machines.

The products are well known for their durability and high performance without any aspect of defects or malfunctioning.

Depending on the process and the different steps of the tin can making, these state of the art machines are designed uniquely to serve you in various stages.

From slitting to beading all the way to flanging and seaming, so that the final product comes out perfectly and ready for use.

That said; let’s have a glimpse of each machine and its function as we guide you through a fact-finding mission regarding tin can made from a simple sheet to a finished container.

Types of Tin Making Production Line Machines

1. Slitting or Shearing Machines

The machine is designed with the following components;

  • Feeding trolley
  • Assisting support
  • The decoiler pincher

  • The straightener

  • Slitter or cutter
  • Edging section

  • Tensional compartment
  • A recoiler section
  • Output equipment
  • Hydraulic system

The whole system is controlled by a programmable logic controller (PLC) with a computer display. This line of tin making machines improves efficiency, the quality and above all, it is cost effective.

2. Can Body Making Machines

This type of tin can making machines are manufactured from high-quality raw materials and equipped with the current advanced technology. They are popularly known for their long-lasting, corrosion free and high-performance ability.

In addition, the machines are customized in various dimensions and they are cost effective. It is, however, recommended for making industrial materials for tin cans as well as foodstuff containers.

They come with the following features:

  • Fine fish
  • Easy to maintain and operate
  • Rigid construction
  • Computer user interface
  • Quantitative control and PLC
  • Inverter for speed  control
  • Digital inverter to supply power for current compensation
  • Push feeding on both sides

3. Top Neck Curling Can Machine

The machine is a hassle free piece of technology with the best performance, low power consumption and long lasting. It is resistant to both heat and corrosion and comes with the following features:

  • High performance

  • Robust
  • Durable
  • The friendly end-user interface with a touchscreen
  • Fully automatic
  • Multi-safety design
  • Designed to be connected with the auto double seamer when necessary

4. Beading tin can making machine

This machine has a vertical design to work along with an automatic double seaming machine. The mode of operation involves the can body being transferred by the help of a timing screw and the turret to give room for the beading roller to get inside the can.

At this stage, the beads are formed as a result of pressure created between the beading roller and the fixed arc-beading rail. The machine has the following features:

  • A centralized lubrication system
  • Safety devices
  • Easy to maintain
  • Customized for various sizes
  • User-friendly interface
  • Automatic

5. Flanging tin can making machine

The machine can easily be linked together with an automatic double seamer. Its mode of operation involves transferring the tin can cylinder using the timing screw and the turret to allow the swing flanging die to make the flange.

The swinging flanging device works using two identical and symmetrical discs that squeeze the fringes of the can. On the other hand, the spin flanging uses a number of turning rollers to forcefully squeeze the can fringes.

The machine is designed with the following features:

  • Vertical design for easy connection to the auto double seamer machine
  • Central lubrication system( recyclable)
  • Touch screen control system
  • Variable speed control
  • Automatic
  • Designed with multi safety features

6. Seaming tin can making machine

The machines are designed in various forms to meet all applications for different operations depending on the products. Some of the common types are:

  • The semi-automatic round can seamers-designed for metals and PET cans
  • Fully automatic-For PET cans
  • Irregular can seamers-for various shapes for cans
  • Vacuum gas flush seamers-for nuts and tennis ball cans
  • Fully automatic filter seamers-designed for air filters
  • Semi-automatic filter seamers-air filter seaming


7. Lock seam can production machine

The machine is used in folding and locking seams on the circular or irregular shaped tin cans. This is possible through the use of semi-automatic foot operated pedal.

It is also designed with power press double operation mechanism for folding and locking at the same time. This is a highly accurate machine and it is built for heavy-duty operations.

Materials Used For Making Cans

Most of the cans are made from tin and aluminum materials. The reason behind the two types of metals is the fact that they are malleable. This implies that the materials can be transformed into various shapes among them, the can shape.

Another factor that is considered is that the two metals are resistant to corrosion and rust as well as being able to be recycled.

Even though the two materials are often used interchangeably, they are in fact different because they possess contrasting properties and have different manufacturing costs.

Tin cans are known to be heavier than those made of aluminum and are more long-lasting. Also, tin cans are highly resistant to the corrosive nature of some foods such as tomatoes. But aluminum cans have one major advantage such that they can be recycled.

The third category of materials can be described based on work-craft. There are flat metal raw materials that are classified according to their thickness.

They may include foil or leaf metal, sheet metal and plate metal. Perfect examples of items derived from work-craft materials are aerosol cans and milk powder cans.

Also, lock seam cans fall in this category of work-craft materials and some of the common items in this group include tea cans, chewing gun cans and many more.

The advantage of using work-craft materials is that it reduces the amount of metal fabrication thus lowering the cost of production drastically.

To wrap up, this tin can making machines are skillfully made to fulfill your desires and needs. They usually undergo vigorous quality tests at every level of their production.

This is done to achieve acceptable standards in terms of precision, abrasion, tensile strength, durability, maintenance and operation.

Moreover, these machines can be customized according to your taste and specifications for your needs.

Benefits of Metal Cans Over Plastic Cans

Historically, metal has always been used when designing parts of the needs to withstand the test of time. With the advancement of technology, some industries have tried to replace metal with plastics. Even though metal might not be the flamboyant material in packaging today, it is an indispensable product for both industries and consumers because its qualities cannot be found in any other materials. Below are some benefits of using metal cans instead of plastic cans.


Metal cans have been efficient in storage and preservation of food. They protect food from light and air, therefore, can be kept for a long time without getting spoiled. Using the tin can making machine, containers made of tin are heavier thus making them more durable and resistant to corrosive properties of acidic food.  Tin cans are often used to package food, while aluminum cans are more often used to package beverages like soda and beer. On the other hand, plastic cans have a short cycle period and therefore, less durable compared to metal cans.


Modern technology has led to a lot of advancement especially in the recycling of materials. Steel and aluminum cans are easy to recycle with no loss of quality, unlike plastics which must not be mixed. It is therefore difficult with plastics as it is impossible to tell the type of material by sight or touch. By recycling of these metal cans, it creates employment to those acquiring and selling scrap metals to the recycling facilities. It also reduces environmental damages caused by mining hence sustainable. That is not the same with plastic which loses value with every recycling.

Environmental impact

Plastic cans take a long time to decompose, and their photodegradation releases toxic chemicals into the surrounding environment. It becomes difficult for all people to adhere to the importance of recycling, therefore, increases garbage and consequently polluting the environment. Additionally, most plastic cans and bottles are thin and porous. Their quality lowers during the recycling process, meaning its value continues to decrease with reuse.

Metal cans, on the other hand, are cost-effective since one can reuse them without exhausting its value. They are also easily recycled since many of them are picked up by do-gooders and profiteers; moreover, metal cans can deteriorate through a natural process.


The raw materials that are used to make metal cans: aluminum and steel, are highly effective as opposed to plastics since they maintain their physical properties forever even after recycling into new products without losing their inherent properties. They are also sustainable as they require less energy to recycle thereby saving over 90% of energy that could have otherwise be used to manufacture cans from new materials. If you are using plastic, then you will not enjoy these benefits.

These are some of the major benefits of using metal packaging such as tin cans over the plastic. With glocal warming being as issue, can packages is the most eco-friendly packaing method that everyone should adopt. Metal packaging is also cheap in the longrun.

Can Manufacturing Process

require removable covers while others require some cutting. Companies use cans for various purposes including storing food for sale, holding beverages, chemicals, oil among other uses. Tin can manufacture process involves multiple processes including seaming and fabrication.

The seaming process entails joining the can body and the ends through micro-seaming. There are various steps in this process which includes flanging the body with one of the cans end getting curled, joining the curled can and the can body. A can use maker machine for seaming operation consist of the closing station, base slate, seaming chuck,  and operation rolls. A base slate supports the body of the can while the seaming chuck holds the cover on the can body, but sometimes it can act as seaming roll pressure back up.

The modern micro-seaming process incorporates all the previous seaming except when re-dimensioning and re-designing the operation rolls. When re-designing the can, the level of hardness and thickness of the metal material is adjusted to obtain the desired length and size. There is also conventional seaming where the curves are designed and re-dimension of second operation rolls.

After completion of the first seam operation, operation roll is retracted, and it can no longer contact the can end. There is a micro-seam improvement that enables a user to obtain a tin can with substantial material savings.

Can Fabrications

There are several stages in can fabrication

  • Formation of the tube and soldering the seams

  • Joining the body with the bottom end

  • Attaching labels and printing

  • Filling the content

  • Sterilization or retorting

  • Joining the body with the top end

Commonly, double seaming is usually preferred when joining the ends with the body to prevent leakage. However, this process sometimes might deform the rims.

Size and Material

Cans can be of different sizes and shapes, but the commons ones are the tuna tin and the soup tin. The walls of these cans are usually stiffened with bulges to help in resisting dents that might cause splitting of the seams. In most local dialects, all-metal cans are referred to as tin can although some are made from aluminium. Some of the cans are made using the tin-free steel, and in some parts like the UK, they produce foods that have a plastic coating to prevent acids corroding the can.

Pros and cons of Tin Can Packaging

Tin cans are some of the most recommended methods for packaging your products food, such as spices, soups, and soft drinks. They are also popular with packaging pharmaceuticals, cosmetic and other consumer products. That is because of the numerous benefits that come with tin cans over the alternative methods. In this article, we’re going to look at some of the key pros and cons of tin cans. Check out the following:


More shelf Life

Compared to most of the available options such as aluminum and steel, tin offers more shelf life. That is because the tin material does not react with the food material. For the other material such as steel and aluminum, they can easily corrode depending on the acidity of the food packaged thus destroying it. That is the reason why these containers cannot be used for the storage of soups, drinks or pharmaceuticals. But for the tin cans, they are not corrosive, and that’s why they can store food for long without it going bad.

Light Weight, Easy to Handle

The issue of weight is critical when it comes to packaging and transporting the products over a long distance. For most service providers, they charge transport fee based on the weight of the load to be shipped. So if you’re looking for ways to reduce the cost of production, then cutting on the transport would be a perfect way. Tins cans are lightweight, and thus they will help reduce the cost of production. They are also easy to hand compared to their counterparts due to this feature.

Rigid and Strong

Tin cans offer incredible flexibility in packaging due to their rigidity and strength features. These are the kind of cans that can maintain their original shape even subject to a high impact. Therefore, you will not have a problem of deformed cans which significantly reduces losses associated with return stock due to deformities. These features also enable to use various forms of transport with worrying about the state of the cans. This is also a features that sellers and customers also look for in tin cans.

Flexible Packaging

Tin cans are extremely flexible when it comes to packaging. Due to the various properties that tin material comes with such as high rigidity and strength, these cans offer high flexibility in packaging. You can arrange these cans the way you see best and can also be transported by any means of transport and still retain their original condition. That is something that may not be seen in other types of cans as they can easily deform or destroy the content inside while in transit.


Packaging Acidic Products

Packaging extremely acidic products are not possible with metallic cans. That is because metal is corrosive and thus the packaging of acidic products would cause a reaction that will definitely destroy both the product and the can. Therefore, these cans cannot be used to package acidic products. This is one of the major causes con of tin cans.