Method and apparatus for manufacturing polyurethane foam injected with strand mats
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United States of America Patent
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Aug 16, 2005
Grant Date -
Feb 20, 2003
app pub date -
Jul 2, 2002
filing date -
Jul 7, 2001
priority date (Note) -
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Abstract
A method and an apparatus for manufacturing a polyurethane foam injected with strand mats. After a polyurethane foam solution is sprayed on the strand mats, the strand mats are moved upward and downward by prominences and depressions and then intermittently pressed by a pressing device, thereby the air in the strand mats being exhausted to the outside. Therefore, the polyurethane foam solution uniformly permeates into the strand mats. As a result, the insulating effect and mechanical strength of the polyurethane foam are increased, uniform surface with no air spaces is obtained, the mechanical properties are made uniform, and shrinkage, cracking, distortion and the like are prevented under a super-low temperature such as less than -;165° C.
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