Method of reducing residual stresses in thermoplastic laminates

Details Method of reducing residual stresses in thermoplastic laminates Method of reducing residual stresses in thermoplastic laminates

1991-08-02

1993-05-18

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Plural sequential shaping or molding steps on same workpiece

264346, B29C 7102

Patent

active

052119025

ABSTRACT:
A method of reducing residual stresses in a fiber reinforced thermoplastic composite laminate having at least one free edge includes the step of heating a region adjacent the free edge using a platen for a time period sufficient to form a localized melt zone of the thermoplastic in the region. The heating step is however done under a sufficient pressure to prevent delamination of the laminate. After this is done, the region is cooled for a time period and under a pressure sufficient using a platen to solidify the region and to prevent the lamination thereof.

REFERENCES:
patent: 3200182 (1965-08-01), Hechelhammer et al.
patent: 5032339 (1991-07-01), Farraye-Callahan et al.

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