Method for manufacturing heat-curable resin molded product

A method of manufacturing a heat-curable resin molded product, such as an unsaturated polyester resin or the like, wherein concavities in the molded product generated as a result of the curing shrinkage of the resin are prevented. A central core member is first disposed within a mold, a heat-curable...

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Bibliographische Detailangaben
Hauptverfasser:	KINPARA SHIGERU, SUZUKI SENJI, OSUMI HISAYOSHI, SATO YOSHIYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A method of manufacturing a heat-curable resin molded product, such as an unsaturated polyester resin or the like, wherein concavities in the molded product generated as a result of the curing shrinkage of the resin are prevented. A central core member is first disposed within a mold, a heat-curable resin liquid is then injected into the mold and heated. The materials of the central core member and the heat-curable resin are selected such that the volume expansion of the central core member during heating of the mold corresponds to the volume shrinkage resulting from the curing of the heat-curable resin, and the expansion of the central core member is synchronized with the curing shrinkage of the heat-curable resin.