DESIGN METHOD FOR MOLD, DESIGN PROGRAM FOR MOLD, MOLD AND RESIN PRODUCT

• Main Authors: NIWA YASUHITO, TSUTSUBUCHI MASAAKI, HIROTA TOMOO
• Format: Patent
• Language: English
• Published: 04.12.2008
• Subjects: 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

PROBLEM TO BE SOLVED: To provide a design method or the like for a mold, for obtaining an optimum shape of the mold when there is variation in a flow characteristics parameter of a resin. SOLUTION: Correction coefficients S when viscosity property data of resins B-D fit viscosity property data of a resin A are respectively obtained, and correlation between MFRs and the correction coefficients S of the resins A-D is obtained. Based on the correlation, relation between a shear rate and a viscosity of a resin X is estimated in a first case that the MFR of the resin X has an arbitrary value and a second case that the MFR of the resin X becomes a sampling value. Based on the relation between the shear rate and the viscosity in the first case and the second case, injection molding analysis when using a member 50 having an arbitrary cavity thickness is performed, and a value of an evaluation function is obtained based on an analysis result thereof. By changing the cavity thickness and repeatedly executing a partial step, the cavity thickness satisfying the optimum value of the evaluation function is specified. COPYRIGHT: (C)2009,JPO&INPIT