Apparatus and method for extruding multi layers resin molded product, pattern of layers easyly changeable with exchangeable flow guide block in nozzle

摘要

The manufacturing apparatus of a resin molded product has a feed block (12) that sets a layer configuration of the resin molded product obtained by molding a plurality of molten resins. The feed block (12) includes a feed block body (32) having a through hole (25), and a plurality of replacement blocks (33, 33a, 33b) that are removably fitted into the through hole (25) and have layer configuring passages (50) corresponding to different layer configurations. A replacement block (33a) before change is pushed out of the through hole (25) by a replacement block (33b) having a layer configuring passage (50) corresponding to a layer configuration after change, thereby changing the layer configuration. This allows an easy change of a layer configuration, and in particular, prevents degradation of resin due to heat or oxidation, and reduces time for the change and a material loss even when a significant change of the layer configuration such as a change of a layer arrangement is performed.