JPH0114005B

PURPOSE:To attain to prevent the warpage and deformation of a material having a shape near to a flat plate, by using materials different in a mold shrinkage factor as front surface part and back surface part forming ones. CONSTITUTION:In supplying a molding material into a mold, when a material larg...

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Bibliographische Detailangaben
1. Verfasser:	MAKI YOSHIKAZU
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To attain to prevent the warpage and deformation of a material having a shape near to a flat plate, by using materials different in a mold shrinkage factor as front surface part and back surface part forming ones. CONSTITUTION:In supplying a molding material into a mold, when a material large in a mold shrinkage factor is supplied to a lower part and one samll in a mold shrinkage factor to the upper part to perform molding, the molded product hardly generates warpage. As the resin for the molding material, an unsaturated polyester and a vinyl ester resin are used as representative ones. In order to change the mold shrinkage factor of these materials, the kind, amount and combination of a filler, a fibrous reinforcing material, a thermoplastic resin, an unsaturated polyester resin and a vinyl ester resin are changed.