Method of tempering workpieces of duroplastic plastic

Details Method of tempering workpieces of duroplastic plastic Method of tempering workpieces of duroplastic plastic

1991-05-24

1992-10-27

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Disparate treatment of article subsequent to working,...

Effecting temperature change

264236, 264347, 26433122, 264346, B29C 3502, B29C 7102

Patent

active

051587327

ABSTRACT:
Method of tempering workpieces of duroplastic plastic, in particular a piston for a motor vheicle brake, provides that the workpiece is heated after the pressing or molding according to a predetermined time-dependent temperature rise for several hours and after an initial heating phase a difference from the respective glass transition temperature of 5.degree. to 40.degree. C. is observed.

REFERENCES:
patent: 2037375 (1936-04-01), Freeman
patent: 2337903 (1943-12-01), Lauck
patent: 2641801 (1953-06-01), Batchelor et al.
patent: 2913770 (1959-11-01), Beno
patent: 3029473 (1962-04-01), Greenberg
Postbaking Phenolic Parts, SPE Journal, Dec. 1968, vol. 24, Jost et al.

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