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Injection Molding Foams ©

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Patentpedia Index 

3/25/2016 through 11/5/2013

1 Patent Abstracts

1 Patent Titles

2 Topics

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2 Topics

C. Foams (1 Topics) (0 Subtopics) (1 Notes ) (162 Patent Titles ) (4 Patent Abstracts ) (3/25/2016)  

D. Injection Molding Applications (1 Topics) (3 Subtopics) (1 Notes ) (101 Patent Titles )   (0 Patent Abstracts) (3/25/2016)    

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1 Notes

1. Injection Molding Foams

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1. Injection Molding Foams

“Foamed resin injection molding techniques typically employ a molten resin with dissolved gas injected into a mold cavity such that the resin foams in the mold cavity. The foaming of the resin is generally produced by using a gas that is provided in the resin under pressure and the resin is injected into the mold cavity such that the drop in pressure triggers cell nucleation and foaming. The injection of resin with a gas in its supercritical state typically creates micron-sized voids in the thermoplastic polymer upon foam molding, and thus is also referred to as microcellular injection molding. Conventional microcellular injection techniques often produced molded parts that contain surface defects, such as swirls, splays, knit lines and flow lines due to gas diffusion. Hence, conventional techniques generally have limited applications to parts that do not have aesthetic appearance requirements”

Sun. Lee and Pauken, US Patent 8,574,473 (11/5/2013)

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Copyright 2016 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen

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Roger D. Corneliussen, Editor
Professor Emeritus
Materials Engineering
Drexel University, Philadelphia, PA
Editor
Maro Publications
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Exton, PA 19341
Telephone: 610 363 1533
Email:
cornelrd@bee.net
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