How do I choose a sealing machine?

Tray sealing machines are used to package food and other products in trays with a tight seal. They are commonly used in restaurants, catering businesses, and food processing plants. When choosing a tray sealing machine, there are several factors to consider, such as the type of trays being used, the sealing method, and the production capacity.

In this article, we will discuss the different types of tray sealing machines available, their features, and how to choose the right one for your business.

What is a tray sealing machine?How does a tray sealing machine work?Types of tray sealing machinesFactors to consider when choosing a tray sealing machineConclusion

What is a tray sealing machine?

A tray sealing machine is a device used to seal food products in trays with a tight seal. The machine applies heat and pressure to the lid material, which melts and adheres to the tray, creating a vacuum seal that preserves the freshness of the food. Tray sealing machines are commonly used in the food industry to package products such as meat, poultry, seafood, fruits, vegetables, and ready-to-eat meals.

There are different types of tray sealing machines available, ranging from manual to fully automatic. Manual tray sealing machines require an operator to place the tray and the lid material, while automatic machines do this automatically and can produce a high volume of sealed trays in a short period of time.

Tray sealing machines can seal different types of trays, such as plastic, foam, or aluminum trays, and can use different sealing methods, such as heat sealing, cling film sealing, or peelable sealing. The choice of tray and sealing method depends on the type of food product being packaged and the desired shelf life.

In addition to sealing food products, tray sealing machines can also be used to package non-food products, such as medical supplies or industrial parts. The machine can be customized to use different tray sizes and sealing materials to meet the specific packaging needs of the product.

How does a tray sealing machine work?

Tray sealing machines work by applying heat and pressure to a plastic film or lid material, which seals the tray containing the product. The process typically involves the following steps:

1. Loading the tray: The operator or the machine itself loads the empty trays onto the conveyor belt or into the loading station.

2. Filling the tray: The trays are filled with the product, either manually or automatically, depending on the machine.

3. Placing the lid: A roll of plastic film or pre-cut lids is placed on top of the filled trays. The film or lid is held in place by a suction cup or vacuum system.

4. Sealing the tray: The trays are moved into the sealing station, where a heated sealing tool comes down and applies pressure to the film or lid. The heat from the tool melts the film or lid, which adheres to the tray and creates a seal.

5. Cooling the seal: The sealed trays are moved to a cooling station, where the seal is allowed to cool and solidify.

6. Cutting the film or lid: If a roll of film is used, the machine automatically cuts the film to the correct size for each tray. If pre-cut lids are used, this step is not necessary.

7. Discharging the trays: The sealed trays are moved onto the conveyor belt or into the unloading station, where they are discharged from the machine.

The entire process is typically automated and can produce a high volume of sealed trays in a short period of time. Some machines also have additional features, such as gas flushing or embossing, to extend the shelf life of the product or to add a decorative touch to the packaging.

Types of tray sealing machines

There are several types of tray sealing machines available on the market, each with its own unique features and capabilities. Here are some of the most common types:

1. Manual tray sealing machines:These machines are operated by hand and are suitable for low-volume production. The operator manually places the tray on the sealing plate, fills it with the product, and places the lid on top. The machine then applies heat and pressure to seal the tray. Manual tray sealing machines are typically less expensive than automatic machines and are easy to operate and maintain.

2. Semi-automatic tray sealing machines:These machines are a step up from manual machines and are suitable for medium-volume production. The operator manually loads the trays into the machine and the machine automatically seals them. Semi-automatic tray sealing machines are faster and more efficient than manual machines, but still require some manual labor.

3. Fully automatic tray sealing machines:These machines are designed for high-volume production and can seal thousands of trays per hour. The entire process, from loading the trays to discharging the sealed trays, is fully automated and requires minimal human intervention. Fully automatic tray sealing machines are more expensive than manual or semi-automatic machines, but they are also more efficient and can save labor costs in the long run.

4. Thermoforming tray sealing machines:These machines use a different sealing method than traditional tray sealing machines. They heat a roll of plastic film and form it into a tray shape using a mold. The product is then placed into the tray and the film is sealed on top. Thermoforming tray sealing machines are suitable for products that require a deep tray or a custom-shaped tray.

5. Skin packaging machines:These machines use a special type of plastic film that adheres tightly to the product and creates a “skin” around it. The film is heated and drawn tightly over the product, creating a vacuum seal. Skin packaging machines are suitable for products that require a longer shelf life or that need to be displayed in a retail setting.

6. MAP (Modified Atmosphere Packaging) machines:These machines use a combination of gases, such as nitrogen and carbon dioxide, to replace the air in the sealed tray. The modified atmosphere helps to preserve the freshness of the product and extend its shelf life. MAP machines are suitable for products that are sensitive to oxygen, such as meat and dairy products.

Each type of tray sealing machine has its own advantages and disadvantages, and the choice of machine will depend on the specific packaging needs of the product and the production volume. It is important to carefully evaluate the options and choose a machine that is suitable for the application and budget.

Factors to consider when choosing a tray sealing machine

When choosing a tray sealing machine, there are several factors to consider to ensure that the machine meets your packaging needs and production requirements. Here are some key factors to keep in mind:

1. Production volume:Consider the volume of product you need to package and choose a machine that can handle your production needs. For high-volume production, a fully automatic machine may be the best option, while for low to medium volume production, a semi-automatic or manual machine may be more suitable.

2. Type of product:Different types of products require different packaging methods. Consider the type of product you need to package, such as fresh or frozen, solid or liquid, and choose a machine that is suitable for your product.

3. Type of tray:Consider the type of tray you will be using, such as plastic, foam, or aluminum, and choose a machine that is compatible with your tray material. Some machines may also have the capability to form trays from a roll of film.

4. Sealing method:There are different sealing methods to choose from, such as heat sealing, cling film sealing, or peelable sealing. Consider the sealing method that is best suited for your product and packaging needs.

5. Machine size and footprint:Consider the size and footprint of the machine and ensure that it fits in your production space. Some machines may have a larger footprint or require additional space for loading and unloading trays.

6. Ease of use and maintenance:Consider the ease of use and maintenance of the machine. Choose a machine that is easy to operate and maintain, with clear instructions and minimal downtime for repairs.

7. Budget:Consider your budget and choose a machine that meets your packaging needs within your price range. Keep in mind that the initial cost of the machine is not the only factor to consider, as ongoing maintenance and operating costs should also be taken into account.

By carefully considering these factors, you can choose a tray sealing machine that meets your packaging needs and production requirements, and helps to ensure the quality and freshness of your product.

Conclusion

Tray sealing machines are an essential tool for packaging food and other products in trays with a tight seal. When choosing a tray sealing machine, it is important to consider factors such as the type of trays being used, the sealing method, and the production capacity. By selecting the right machine, businesses can improve their packaging efficiency and extend the shelf life of their products.