Method of producing open-celled metal structures
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United States of America Patent
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Aug 27, 1991
Grant Date -
N/A
app pub date -
May 14, 1990
filing date -
May 26, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lost positive pattern comprising an open-pored plastics substrate containing pores with an average width of from one to three millimeters is used, in which, after a negative pattern has been made, the voids which it, as a core, contains are filled with metal by casting and the negative pattern is removed. The production of the negative pattern is preceded by the following method steps in which once the substrate of plastics material has been cleaned, it is wetted throughout with a keying resin film which partially dissolves the structure of its surface and in which at least one coat of an auto-crosslinking two-pack silicone is applied onto and into the whole of the substrate of plastics material to thicken the walls and/or the interlinking webs of the porous substrate of plastics material.
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