Vacuum packaging is a package that protects products from environmental pollution and prolongs the shelf life of foods, and improves the value and quality of products. Vacuum packaging technology originated in the 1940s. Since the successful application of polyester and polyethylene plastic films in commodity packaging in 1950, vacuum packaging machines have developed rapidly. At present, the speed of high-efficiency vacuum packaging machines has been increased from several parts per minute to dozens, and the production efficiency of thermoforming-filling-sealing machines can reach more than 500 pieces/min.
In the field of people's lives and work, a variety of plastic vacuum packaging is everywhere. Lightweight, sealed, fresh-keeping, anti-corrosion, anti-rust plastic vacuum packaging from food to medicine, knitwear, from precision product manufacturing to metal processing plants and laboratories. The application of plastic vacuum packaging is becoming more and more extensive, which promotes the development of plastic vacuum packaging machines and puts forward higher requirements. At present, the development trend of vacuum packaging technology and equipment in the world is mainly reflected in the following aspects.
Production automation: The automation of vacuum packaging machines not only improves production efficiency, but also has the advantages of safety and hygiene. The TYP-B series rotary vacuum chamber packaging machine produced by the Japanese company is a multi-station packaging machine with a relatively high degree of automation. The machine has two turntables for filling and vacuuming, and there are 6 stations for filling the turntable. The bag is filled, the material is fed, the liquid is pre-sealed, and the package is sent to the vacuum rotary table. The vacuum rotary table has 12 stations (vacuum Room), complete vacuuming and sealing, finished product output and other processes, production efficiency of up to 40 bags / min, mainly used for packaging soft canned food.
Single-machine multi-function: Multi-function on a single machine, which can easily expand the scope of use. The versatility of the stand-alone unit is done in a modular design. Through the transformation and combination of different functional modules, vacuum packaging machines suitable for different packaging materials, packaging mouths and packaging requirements are produced. The representative products are multi-station bag vacuum packaging machine produced by HESSER factory of Germany BOSCH Company. It can integrate bag, weigh, fill, vacuum, seal and other functions in one, convenient and fast.
Assembling the production line: When more and more functions are required, concentrating all functions on a single machine makes the structure very complicated and inconvenient to operate and maintain. At this time, several machines with different functions and matching efficiencies can be combined into a more complete production line to complete more complicated packaging processes. For example, the fresh fish vacuum packaging production line developed by CRACECRYOYA and ISTM in France, the textile vacuum packaging system developed by Swedish Shuhong International Co., Ltd. and the Swedish Textile Research Institute belong to this type.
Adopting new technology: In the packaging method, a large number of inflatable packaging is used instead of vacuum packaging, and the research on inflatable components, packaging materials and inflatable packaging machine is closely combined; in the control technology, more application of computer technology and microelectronic technology In the aspect of sealing, apply heat pipe and cold sealing technology; install advanced equipment directly on vacuum packaging machine, such as computer-controlled coarse-grain high-precision combination scale; apply advanced high-speed arc on rotary or vacuum packaging machine Face cam indexing machine, etc. The adoption of all these new technologies makes vacuum packaging machines more efficient and intelligent.
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