The unit adopts special-designed SJSZ 80 Conical Double-Screw Extruder, and imported frequency converter for goverming. It also adopts imported RKC temperature controller. It has the advantages of wide adjustment range, high precision, convenient oper-ation and so on. The auxiliary parts is composed of vacuum calibration table, haul off, cutter and stackrack. The unit adopts large cooling device to ensure the shaping result of door plate. The haul off adopts imported reducer, motor and frequency converter. It has reasonable structure, large hauling force, steady hauling, etc. The cutter has the advantages of reliable and correct work, high precision of cutting, etc. The stackrack has amovable buggy and special rubber protection layer. It has the advantages of no-wearing, simple use, etc. The auxiliary parts adopt programmable controller or control system made in China, The control of the whole machine is reliable and steady.