Document Type and Number:
Japanese Patent JPS6345287
Kind Code:
B2
Abstract:
PURPOSE:To permit the press molding of an expanded interior having a three- layered structure as well as prevent the loss of elasticity during the press molding period by a method in which an unexpanded resin having a desired characteristic is heated before molding and expanded inside a force by a cold press molding method. CONSTITUTION:An unexpanded thermoplastic resin sheet 3 trimmed by cutting is put into an infrared heater device 10 to heat it to the melting point of an inside base resin, whereupon the resin sheet 3 is expanded in the thickwise direction. A core member 2 is placed on the face 1a of a cold press bottom force 1, an expandible resin sheet 3 plasticized and expanded by heating is laminated on the core member 2, and a surface skin member 4 is placed on the upside of the expandible resin sheet 3. Under the condition, the top and bottom force 5 and 1 of a cold press are soon coupled with each other to deform the surface skin member 4 and the expandible resin sheet 3 by the coupling pressure along the shape of the cavity. The resin sheet 3 is solidified in the expanded state and a molding having each part of which is integrally combined is formed in the force. The resin sheet 3 is solidified by cooling under a condition that an expansion ratio corresponding to the thickness of cavity is kept, and the shape of the molding is kept correspondingly to the compression ratio.
Inventors:
NAGASHIMA TSUNEYASU
Application Number:
JP15638182A
Publication Date:
September 08, 1988
Filing Date:
September 08, 1982
Export Citation:
Assignee:
KASAI KOGYO KK
International Classes:
B29C57/00; B29C43/20; B29C44/16; B29C59/00; B29C63/00; B32B37/00; B60R13/02; B29K75/00; B29K105/04; B29L9/00; B29L31/58