Press mould half, more especially for producing records

Details Press mould half, more especially for producing records Press mould half, more especially for producing records

1979-05-31

1981-01-20

Flint, Jr., J. Howard

Static molds

Including means within surface to confine heat exchange medium

Mold part of particular material

425410, 249 79, B29D 1700, B29C 1700

Patent

active

042458110

ABSTRACT:
A press mold half for producing records comprises a mould half having a psing surface thereon, and a channel system beneath the surface for conducting heating and cooling fluids in indirect heat transfer relationship with the surface. The channel system includes spaced apart inflow and outflow fluid collecting chambers, and a number of channels extending over given paths between the chambers, the overall cross section of the channels in regions adjacent the outflow collecting chamber is less than the smallest overall cross section of the channels over the remainder of their paths, thereby resulting in uniform heating and cooling of the material being pressed.

REFERENCES:
patent: 15608 (1923-05-01), Burroughs
patent: 1307812 (1919-06-01), Errickson
patent: 1504422 (1924-08-01), Bishop
patent: 1582704 (1926-04-01), Sylvester et al.
patent: 2501823 (1950-03-01), Leedorm
patent: 3830459 (1974-08-01), Strausfeld
patent: 3918875 (1975-11-01), Phillipson et al.
patent: 4018552 (1977-04-01), Prast et al.

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