B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 33/04 (2006.01) B29C 35/00 (2006.01) B29C 45/73 (2006.01) B29C 33/38 (2006.01) B29C 35/04 (2006.01) B29C 35/16 (2006.01)
Patent
CA 2105295
Method for tempering a moulding tool intended for production of products of natural or synthetic polymers, which moulding tool includes one or more moulding 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 moulding part or parts (3,4) a moulding cavity (9) has then been made, whereby preferably the outer envelope surface of the moulding 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 moulding 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 moulding tool to a desired extent.
Cette invention concerne une technique de refroidissement d'un outil de moulage destiné à la production d'articles en polymères naturels ou de synthèse, ledit outil de moulage étant composé d'une ou de plusieurs pièces (3, 4) en métal fritté poreux obtenues par compression d'une poudre à hautes pression et température, lesdites pièces (3, 4) définissant une empreinte de moulage (9) dont l'enveloppe extérieure est de préférence parfaitement étanche. La technique proposée comprend le raccordement d'une ou plusieurs canalisations, des tubes capillaires (6, 8) ou analogues, à l'enveloppe extérieure étanche et l'injection dans la masse poreuse de l'outil de moulage d'un gaz à l'état et à la température voulus pour un refroidissement rapide approprié.
Aga Akteibolag
Fetherstonhaugh & Co.
LandOfFree
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