Method and apparatus for manufacturing polyurethane foam...

Details Method and apparatus for manufacturing polyurethane foam... Method and apparatus for manufacturing polyurethane foam...

2005-08-16

2005-08-16

Kuhns, Allan R. (Department: 1732)

Plastic article or earthenware shaping or treating: apparatus

With mechanical means forming or expanding pores

C425S112000, C425S373000, C425S81700C

Reexamination Certificate

active

06929459

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.

REFERENCES:
patent: 4121957 (1978-10-01), Allen
patent: 4279060 (1981-07-01), Wirth
patent: 4475271 (1984-10-01), Lovgren et al.
patent: 6265047 (2001-07-01), Chapuis et al.

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