MACHINE FOR SHAPING HOLLOW OBJECTS FROM THERMOPLASTIC SHEET Russian patent published in 1997 - IPC

FIELD: processing of polymer materials. SUBSTANCE: invention relates to manufacturing hollow objects from thin thermoplastic sheets, for example, intermediate products in production of packing containers, protective packages, etc. from sheets or films of polyvinylchloride, polypropylene, polystyrene, and others. Shaping machine additionally has pressure plate of heat-insulating material. Contact heating plate includes removable plate. Pressure plate embraces that removable plate across side surface. Contact surface of removable plate is coated with a layer of antiadhesion material. Pressure plate negligibly protrudes over the contact surface of removable plate. Area of surface of sheet under shaping is no more than area of contact surface of removable plate. Pressure plate is made of textolite. EFFECT: improved structure. 4 cl, 1 dwg