Pressing block for die pressing thermoplastic material

Details Pressing block for die pressing thermoplastic material Pressing block for die pressing thermoplastic material

1975-11-05

1977-04-19

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Press forming apparatus having opposed press members

Including both heating and cooling means

425810, 425384, 249 80, B29D 1700, B29C 300

Patent

active

040185524

ABSTRACT:
A pressing block for a phonograph or video record press in which ducts for cooling and heating media for the die are formed by a thin layer of a porous heat-conducting material provided between two thin metal sheets and bonded thereto. The assembly is connected on its side remote from the die to a supporting element of at least partially heat-insulating material.

REFERENCES:
patent: 2510907 (1950-06-01), Renaud
patent: 3081488 (1963-03-01), Casavina et al.
patent: 3918875 (1975-11-01), Phillipson et al.
patent: 3941547 (1976-03-01), Hunyar et al.
"Polyimides," from p. 65 of book, Plastics, by Der Bois and John, 1967, Reinhold Pub. Corp., N. Y.

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