Patent ID: 6576180
Filing Date: 2003-06-10
Classification: B29C,B29L

Abstract:
A process for the production of corrugated plastic tubes comprising:passing a plastic material by means of an extrusion device downwardly through at least one perpendicularly arranged injection head into a perpendicularly arranged mold section; molding corrugated plastic tubes from the plastic material in the mold section by the plastic material being caused to bear against said mold section in molding contact therewith by virtue of at least one of reduced external pressure and increased internal pressure: wherein the mold section is formed by pairs of movable mold jaws which are disposed one above the other and which are displaced repeatedly starting from an initial position in a radial direction towards each other, thereafter in the axial direction of the mold section downwardly, then radially away from each other and then axially upwardly back into said initial position again; including arranging separating planes of the mold jaws of the pairs in axially mutually superposed relationship and displacing said mold jaws in a peripheral direction relative to each other through at least one angle.