Method for integrally molding a thermoplastic laminated assembly

Details Method for integrally molding a thermoplastic laminated assembly Method for integrally molding a thermoplastic laminated assembly

1997-10-23

1999-10-19

Silbaugh, Jan H.

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

264275, 264DIG57, 425112, 425125, B26C 4514

Patent

active

059684372

ABSTRACT:
In a mold press forming process for integrally molding a resin core member and a surface skin member, prior to the step of forming the resin core member, a surface skin member is retained between an upper die half and a lower die half by a surface skin retaining frame which consists of a fixed segment and a moveable segment. The moveable segment is moved vertically relatively to the fixed segment to better adapt the surface skin member to a three-dimensional parting line between the upper and lower half dies. When mounting the surface skin member onto the surface skin retaining frame presents a planar mounting surface, the mounting work is facilitated, and automated mounting devices can be used without any problem. Because the surface skin member can be stretched to a shape which approximately conform to the final shape of the laminated assembly by virtue of the moveable segment of the surface skin retaining frame, the surface skin member is prevented from being stretched excessively in localized parts thereof. Therefore, the surface skin member is prevented from being excessively thinned, whitened or ruptured during the molding process. Residual stress in the surface skin member is also minimized so that the molded laminated assembly is made free from warping which could be caused by excessive stretching of the surface skin member during the molding process.

REFERENCES:
patent: 4570897 (1986-02-01), Von Holdt
patent: 5068065 (1991-11-01), Maus et al.
patent: 5178815 (1993-01-01), Yokote et al.
patent: 5429786 (1995-07-01), Jogan et al.
patent: 5679301 (1997-10-01), Miklas et al.

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