METHOD FOR FORMING RECESS LINE OR RECESS CONTOUR ON SHEET OR TUBE PART OF PLASTIC MATERIAL OR METAL/PLASTIC MATERIAL, AND USE OF THIS METHOD IN MANUFACTURE OF FLEXIBLE TUBE VESSEL

摘要

PURPOSE: To provide a method for forming a recess line or recess contour on a sheet or tube part of a plastic material or metal/plastic multilayer material. ;CONSTITUTION: A sheet or tube part 6 is clamped between a tool 1 with one or more marking protrusions and an elastic support means 9 for obtaining a recess line or recess contour. In this method, the temperature of the sheet or tube part 6 during the clamping process is equal to or lower than 50°C and the elastic support means 9 has 70-120 of Shore D hardness. The feature of this method is that the recess line or recess contour is made by plastic deformation with elastic restoration.;COPYRIGHT: (C)1993,JPO