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US 8,784,715 B2Granted
Structure of parts made from plural composite pieces and method of building those parts
AssigneeHitachi, Ltd.
InventorsKatsuhide Oohashi, Shigeo Amagi, Osamu Miyo
Life of this patent
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Abstract
A pre-molded part is formed by pre-molding an insert with a pre-molded member, and then the pre-molded part is inserted into an over-molded member composed of thermo plastic resin. After applying a heat treatment with a temperature lower than a crystalline melting point of the pre-molded part to the pre-molded part surrounding the insert, a firm contact between the insert and the resin surrounding the insert without a gap at the interface between those parts is obtained.
Claims10
A production method of a composite molded part comprising:
- providing a pre-molded member consisting essentially of thermoplastic resin having crystallinity,
- subsequently forming at least one pre-molded part by pre-molding at least one insert member consisting essentially of metal, ceramic, resin, or a combination of those materials with the pre-molded member,
- applying heat treatment to a surrounding pre-molded member of said pre-molded part at a temperature of from 130° C. to 170° C. lower than a crystalline melting point of said pre-molded part of from 220° C. to 270° C. for about one hour, and then applying an insert molding process to an over-molding member to insert said pre-molded part, which has been cooled, solidified, and molded, into the over-molding member, and
- over-molding said at least one pre-molded part with an over-molded member consisting essentially of thermoplastic resin to form the composite molded part.
1 more element
Dependencies are inferred from the claim text.