Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling fluid pressure in direct contact with molding...
Patent
1989-11-16
1991-06-04
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling fluid pressure in direct contact with molding...
264 83, 264500, 264570, 264DIG50, 425812, B29C 4534, B29C 4537, B29C 4576
Patent
active
050212036
ABSTRACT:
A method for the regulation of the process conditions in a moulding tool which is intended for the production of products of natural or synthetic polymers. The moulding tool is made up of one or more moulding parts made of sintered metal with communicating pores obtained by pressing at a high pressure and sintering at a high temperature of a powdered material. The moulding part or parts have a moulding cavity, such that the pores are open toward the moulding cavity. The outer envelop surface of the moulding tool is tightened against leakage. The method includes filling the communicating pores with a liquid with a high vaporizing temperature and regulating the pressure on the liquid in the pores by means of a suitable pressure producer connected with the communicating pores in the moulding tool.
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Aberg Anders B. H.
Larsson Owe G. T.
Silbaugh Jan H.
Timm Catherine
Toolvac Engineering AB
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