Compression Molding
9/21/2010
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This is the www.maropolymeronline.com website. Links to recent articles and patents are kept here until they can added to the SPE Encyclopedia on the SPE server. (Roger D. Corneliussen, 8/20/2010)
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“A method of
molding in which the molding material, generally preheated, is first placed in
an open, heated mold cavity. The mold is closed with a top force or plug member,
pressure is applied to force the material into contact with all mold areas, and
heat and pressure are maintained until the molding material has cured. The
process employs thermosetting resins in a partially cured stage, either in the
form of granules, putty-like masses, or preforms. Compression molding is a
high-volume, high-pressure method suitable for molding complex, high-strength
fiberglass reinforcements. Advanced composite thermoplastics can also be
compression molded with unidirectional tapes, woven fabrics, randomly orientated
fiber mat or chopped strand. The advantage of compression molding is its ability
to mold large, fairly intricate parts. Compression molding produces fewer knit
lines and less fiber-length degradation than injection molding.”
CRC Press:
http://composite.about.com/library/glossary/c/bldef-c1203.htm (11/3/2008)
SPE Encyclopedia Current Awareness
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8/3/2010
7,767,127
Method for manufacturing perforated and/or two-color components, particularly
for shoes in general
Bramani of Vibram have produced perforated two color rubber sheets by
placing a rubber sheet in a mold with several cavities covered with a release
plastics. Heat and pressure are applied to fill the cavites with the rubber.
This is followed by a second sheet which is molded to the first sheet.
7/20/2010
7,758,781
Blends of high temperature resins suitable for fabrication using powdered metal
or compression molding techniques
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Roger D Corneliussen
Editor
Telephone: 610 363 9920
Fax: 610 363 9921
Email:
cornelrd@bee.net
SPE Online Encyclopedia
www.maropolymeronline.com