DIE, EXTRUDING DIE, AND METHOD AND APPARATUS FOR DESIGNING CORE

PROBLEM TO BE SOLVED: To design a die, an extruding die, and a core by simulating a molding process on a computer, without making them on an experimental basis. SOLUTION: A variation in the shape of a molten resin when a parison is formed by extruding the molten resin through a gap between an extrud...

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Bibliographische Detailangaben
Hauptverfasser:	NISHIMINE NAOHIDE, NARISHIMA TAKESHI, KIMURA TAKESHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PERFORMING OPERATIONS PHYSICS 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:	PROBLEM TO BE SOLVED: To design a die, an extruding die, and a core by simulating a molding process on a computer, without making them on an experimental basis. SOLUTION: A variation in the shape of a molten resin when a parison is formed by extruding the molten resin through a gap between an extruding die and a core is simulated, a variation in the shape of the molten resin when the die is clamped for an extruded parison and compressed air is blown into the parison is simulated, and a heat deformation caused when an molded item obtained by curing the molten resin in the die in a state of high temperatures is taken out of the die and cooled is simulated to determine the shapes of a die and an extruding die based on the results of these simulations, thereby obtaining a molded item having a desired shape.