What Is Cap Sealing Machinery?
Cap sealing machinery is machinery that heat-seals (thermo-compresses) a container and a film to seal the contents while sealing the film.
The purpose of heat sealing is to prevent liquid leakage from the container, to prevent foreign matter from entering the container, to improve the shelf life of food products, and to add value to the product.
There are two types of cap sealing machines: semi-automatic and fully automatic.
Semi-automatic sealers are relatively small machines for small-lot production that require manual operation.
Fully automatic sealers are large machines that can be operated continuously for mass production.
Uses of Cap Sealing Machinery
Cap sealing machinery ranges from mass-production models that are incorporated into food production lines to portable models for small stores and mobile sales.
In particular, examples of food applications include tofu, prepared foods, seafood, meat, desserts, pickles, processed marine products, shellfish, etc., and nursing food.
In addition, it can also be used for air fresheners, cosmetics, and other industrial and medical applications.
Principle of Cap Sealing Machinery
In the cap sealing machinery, the container is first covered with a lid, and the sealing material is paper, paper plus aluminum vapor deposition, or resin film, which must adhere to the container.
Adhesion methods include heating, thermo-compression bonding, ultrasonic waves, etc. There are two types of sealing methods: one is to cover the seal that has been formed first, and the other is to cut the overflowing part after sealing.
The heat sealing method here, using thermo-compression, involves covering a plastic cap with a film and clamping it at a certain temperature, for a certain time, and under a certain pressure to weld the cap and the film material together with the intended strength.
The temperature, pressing time, and pressure of the metal heating plate can be controlled within a practical range, and sealing is possible with extremely high reliability.
It applies not only to a wide variety of foods but also to various contents and can be used not only for various types of container packaging but also for product prototyping.
Also, as long as a mold is available, it can be used for containers of various shapes as well as general shapes.
Furthermore, gas displacement can be performed at the time of sealing, and especially when used in combination with a gas mixer that supplies a certain ratio of carbon dioxide gas and nitrogen gas, etc., the spatial gas composition inside the container can also be controlled.