IMPROVED EXTRUSION DEVICE FOR PLASTIC MATERIALS FOR USE IN CHEMICAL AND FOOD INDUSTRIES

摘要

Improved extrusion device for plastic materials for use in chemical and food industries consisting of a hollow cylinder open at one end and fitted with extrusion die at its closed end, a reciprocating power screw rod with a piston at one end, a prime mover, a variable speed mechanism and a reduction gear box therefor, wherein the means to reciprocate the power screw rod comprises of an internally threaded sleeve meshing with the profile of external threads provided on the said power screw rod mounted within a rectangular box.