WO1997016295B1 - - Google Patents

Claims

Claims for suspension ^ 1 5 9 May 2007 1 5 Η (1 5 0 5. 7 7) International Bureau Accepted: 1 1 and 2 are the new claims 1 and 2 It was changed to 2. (1 i)]

 1. In order to produce a sandwich-like synthetic resin molded product comprising a core and an outer layer covering the core, the outer layer molding material is injected into the molding cavity of the mold through the gain at injection speed V 1. First step of flowing the core molding material into the outer layer molding material in the gate and in the cavity and flowing the outer layer and core molding materials into the cavity, the outer layer The molding material for core is injected while the molding material for core is injected at the injection speed V i

V! A _{second step} of injecting at a higher injection speed V ₂ and then making the injection speed of the outer layer molding material slower than the injection speed V 1 while maintaining the injection speed V ₂ ; the material, the injected by the second of said outer layer forming material in the process the final injection speed following injection speed V _3, the outer layer and molding material for the core of the double structure existing in the said gate in said Kiyabiti A third step of forming the core and the outer layer by extruding, and a method of producing a sandwich-like synthetic resin molded article, characterized by using:

 2. The method for producing a sandwich-like synthetic resin molded article according to claim 1, wherein the injection of the molding material for the outer layer and the molding material for the core into the gate is performed through a hot runner.

Captured form (Trade Number 19