| 摘要 |
PROBLEM TO BE SOLVED: To provide a device that controls thickness of each layer by a simple method to uniform the film thickness in the width direction of each layer, in manufacturing a multilayer film from a die by coextruding a molten resin in a feed block method.SOLUTION: A feed block of a multilayer extrusion molding device comprises a flow plate, a beak, and a die joint. The flow plate has a plurality of openings for introducing a plurality of molten resins. The beak has an inner layer passage and an outer layer passage that are passages for the plurality of molten resins introduced to the plurality of openings and a confluent passage. The inner layer passage has a rectangular cross section and the outer layer passage has a rectangular cross section and merges to the inner layer passage from the side. The confluent passage where the outer layer passage merges to the inner layer passage has a rectangular cross section. The die joint has the confluent passage and a passage that connects to a single layer die. A partition wall having a plurality of heating elements in the width direction is arranged between the inner layer passage and the outer layer passage, the temperature of the plurality of heating elements being controlled. |
