COOLING METHODS FOR POLYVINYL CHRORIDE COATED CONDUIT

摘要

The present invention relates to a cooling method for molding a conduit by extruding a PVC (Polyvinyl chloride) material. More specifically, the present invention relates to the method for attaching the PVC material on the conduit during a process of molding the conduit by extruding the PVC material. According to an embodiment of the present invention, a defective rate caused by deformation of an inner PVC material is substantially reduced; convenience for a user can be significantly increased at the same time; and thus productivity can be significantly increased.