This machine unit adopts the specially-designed SJZ65 or SJZ80 cone twin-screw extruder, imported transducer for speed adjusting, and imported RKC temperature control instrument, featuring wide adjusting scope, high temperature control precision, and convenient and reliable operation. The auxiliary machine is made up of vacuum shaping platform, tractor, cutter, and loading rack. The equipment of large forced refrigeration device ensures the shaping effect of door plates. Crawl type tractor, by adoption of reducer motor and transducer, is featured by reasonable structure, large traction force, and stable traction. The cutter is reliable and correct in operation and high in cutting precision. The loading rack, attached with movable loading trolley and special rubber protection layer, doesn't damage any materials and is convenient for use. The auxiliary machine unit adopts PLC control or domestic famous control system, reliable and stable.