Process for producing multilayer molded article

Details Process for producing multilayer molded article Process for producing multilayer molded article

1996-09-30

1998-08-18

Ortiz, Angela

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

2643287, B29C 4564, B29C 4573

Patent

active

057955263

ABSTRACT:
A process for producing a multilayer molded article in which a skin material is laminated to the surface of a thermoplastic resin core material which comprises feeding the skin material to the cavity of a pair of female and male molds which are not closed, subsequently feeding the molten thermoplastic resin to the cavity of the molds through a resin passageway provided in the molds, clamping both molds to shape the molten resin in the cavity of the molds and then cooling the resin under pressure, characterized in that the cooling under pressure is conducted so that the temperature for feeding the molten thermoplastic resin to the cavity of the molds is in the range of from 175.degree. to 195.degree. C., the clamping pressure at completion of the shaping is in the range of from 30 to 95 kg/cm.sup.2 and the product of the clamping pressure and the pressing time is in the range of from 100 to 1,500 kg/cm.sup.2.sec.

REFERENCES:
patent: 5034076 (1991-07-01), Masui et al.
patent: 5292465 (1994-03-01), Kobayashi et al.
patent: 5352397 (1994-10-01), Hara et al.
patent: 5401457 (1995-03-01), Valyi
patent: 5453240 (1995-09-01), D'Hooren

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