PRODUCTION OF LAMINATE

Japanese Patent JP3190749

B2

PURPOSE: To produce a laminate with a small manhour and a high yield of a material by a method wherein a core material is molded in a pair of molds, a cavity is formed between the core material and a lower mold by a relative movement of the upper mold with the core material therein, and a foaming material is injected into the cavity for forming a skin layer cooled and set on the mold surface and a foamed layer between the skin layer and the core material.
CONSTITUTION: A second cavity 25 is formed by an upper mold 15 and a second lower mold 6. A thermoplastic resin is supplied to the cavity to be molded into a core material 26. After that, the upper mold 15 with the core material 26 therein is raised, thereafter being lowered toward a first lower mold 5 to form a first cavity 28 by the core material 26 and the first lower mold 5. A foaming material 30 is charged into the cavity 28 by injection. Next, the upper mold 15 is raised by a stroke (t) for increasing the volume of the first cavity 28. Then, the foaming material 30 is lowered in pressure to be internally foamed to be molded into a foamed layer 32. A part of the foaming material 30 in contact with the first lower mold 5 is cooled and set in unfoamed states to be molded into a hard skin layer 33.

WO/2010/004185	MOLD AND METHOD FOR MANUFACTURING AN AUTOMOBILE PART PARTIALLY COVERED IN PLASTIC
WO/1994/006670	MODULAR COMPOSITE BICYCLE FRAME

Seiji Yasui
Masanobu Kurumaji
Takeshi Nagaoka

JP31575492A

July 23, 2001

October 29, 1992

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KABUSHIKI KAISHA KOBE SEIKO SHO

B29C45/14; B29C45/16; B29C45/56; B29C45/70; B29L9/00; B29L31/58; (IPC1-7): B29C45/16; B29C45/56; B29C45/70

JP6234133A
JP1264823A

Yoshiyuki Kaji

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