July 2024
Intermediate to advanced
280 pages
12h 52m
English
Content preview from The Essential Handbook of Polymer Terms and Attributes
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33 Compression Molding
Compression molding is the process of molding in which a preheated polymer is placed into an open, heated mold cavity.
Compression molding was developed in the early 1900s to mold Bakelite (phenolic) molding compounds. The basic process consists of heating a thermoset resin under severe pressure within a closed mold cavity until the resin cures through a chemical reaction of crosslinking polymeric chains. Under pressure, the resin liquefies and flows, taking the shape of the mold cavity, and then hardens into the desired product. Once sufficiently cooled and strong, the part is removed from the mold. The curing reaction continues while cooling to ambient (room) conditions. Compression molding ...
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