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Definition:
(1) A preshaped fibrous reinforcement formed by distribution of chopped fibers by air, water flotation or vacuum over the surface of a perforated screen to the approximate contour and thickness desired in the finished part. (2) A preshaped fibrous reinforcement, of mat or cloth, formed to desired shape on a mandrel or mock-up prior to being placed in a mold press. Normally, the mat is lightly bonded with a fast curing resin in approximately the shape of the end product, for use in processes such as matched-die molding. (3) Also applies to tablets, biscuits and pellets of thermosetting and thermoplastic compounds which are formed by compressing premixed material to facilitate handling and control of uniformity of charges for mold loading. (4) May be used as a verb for the fabrication of molding powders into pellets, tablets or shapes designed to facilitate filling of cavities in molding processes.
Definition Copyright ©1989 CRC Press LLC. All rights
reserved.
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