Method for forming multilayer sheet or multilayer film

摘要

An improved method for forming a multilayer sheet or multilayer film and an improved forming die apparatus, include making the thickness of the multilayer sheet or multilayer film uniform along the width. In the forming die apparatus, an elastic choke bar is disposed in a passage of the melted resin along the width of the passage. A plurality of bolt members are arranged to abut against the choke bar. The choke bar is pushed and pulled by each bolt member, and a part of the choke bar corresponding to the bolt member is bent with regard to the passage. Thereby, the clearance along the width of the passage can be adjusted for every bolt member.