Method of tempering a molding tool

Details Method of tempering a molding tool Method of tempering a molding tool

1995-04-18

1996-05-14

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

With step of cleaning, polishing, or preconditioning...

249 79, 249 80, 264102, 26432816, 425546, 425547, 425552, B29C 4573

Patent

active

055164706

ABSTRACT:
Method for tempering a molding tool intended for production of products of natural or synthetic polymers, which molding tool includes one or more molding parts (3, 4) made of sintered metal with communicating pores obtained by pressing at a high pressure and sintering at a high temperature of a powdered material, in which molding part or parts (3, 4) a molding cavity (9) has then been made, whereby preferably the outer envelope surface of the molding tool is tight. The method comprises tightly connecting one or more channels, capillary tubes (6, 8) or the like through the tight outer envelope surface to the mould material of the molding tool situated inside, which material contains a large number of small communicating pores and feeding a gas having a suitable state and a suitable temperature through the channels thereby causing a rapid tempering of the molding tool to a desired extent.

REFERENCES:
patent: 4139177 (1979-02-01), Hanning
patent: 4177238 (1979-12-01), Allen

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