摘要 |
PROBLEM TO BE SOLVED: To make breaking occur in a more preferable part in a method for the breaking separation of a molded product due to ultrasonic vibration. SOLUTION: A molding condition setting method is developed by noticing such a fact that a breaking position can be estimated with considerable accuracy by investigating the residual stress of a molding completion product. When the molding conditions of the molding completion product are determined, this molding condition setting method has a step for actually forming a plurality of the molding completion products by changing the molding conditions, a step for investigating the distributions and magnitudes of the residual stresses in the vicinity of the gate parts of a plurality of the molding completion products, a step for determining molding conditions for obtaining the preferable breaking position of the boundary parts of the gate parts and the molded products on the basis of the distributions and magnitudes of the residual stresses. COPYRIGHT: (C)2004,JPO
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