What is the principle of vacuum molding machine molding1

Explain what is the principle of vacuum molding machine molding vacuum forming machine is a lot of more phyletic, in what ways do you use, effect of different prices are different, such as thick slices vacuum forming machine, vacuum packing forming machine and advertising vacuum molding machine are very different. Vacuum molding machine molding principle: vacuum forming and hot forming, the forming process is mainly generated by vacuum pump vacuum suction will soften after PVC, PET, PETG, APTT, PP, PE, PS etc hot plasticity plastic sheet after vacuum forming mould into various shapes of vacuum hood, vacuum forming trays, blister, etc. Currently on the market of the common products are: daily goods vacuum forming packaging, hardware vacuum forming packaging, automotive supplies vacuum forming packaging vacuum forming packaging, electronic products, food vacuum forming vacuum forming packaging, cosmetics packaging, computer peripheral equipment vacuum forming packaging vacuum forming packaging, toys, sports products vacuum forming package is installed, stationery vacuum forming packaging, etc. Its main structure is made up of feeding, pull up and down, the electric heating furnace, brake, the multi-function adjustable size, lower die plate, on the upper die, brake, knife switches, slicing, and match with vacuum unit, etc; Is given priority to with pneumatic device power source, its pull piece and piece USES motor, reducer, time relay, intermediate relays, trip switch of electric equipment such as automatic control system.