Principle of blister molding machine: This molding process mainly uses the vacuum suction generated by a vacuum pump to heat and soften thermoplastic plastic sheets such as PVC, PET, PETG, APTT, PP, PE, PS, etc. into various shapes of vacuum hoods, blister trays, bubble shells, etc. through a mold. The requirements for the control system of the blister machine are to ensure convenient operation, high accuracy of mechanical action and temperature control, short production time, and the greatest possible savings in mechanical power consumption under the same production conditions.