METHOD FOR MANUFACTURING SPLIT CORRUGATED PIPE

摘要

PROBLEM TO BE SOLVED: To simply manufacture a split corrugated pipe of good accuracy by a series of processes including extrusion molding without deforming both end parts in the peripheral direction thereof and to dispense with a secondary processing process. SOLUTION: At first, a plain pipe 32 having a split shape is extruded from the outlet 30 having a semi-circular arc shape of a mold 28 and pressed to the molding surfaces having a corrugated shape of mold blocks 38 and 40 to mold the pipe wall of the plain pipe into a corrugated shape.