BMC材の材料流れの様相に及ぼすチャージパターンの影響について

概要

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The compression molding process using SMC or BMC has a good advantage to a mass production technology. However, concerning with the design of the die the plastic production technology for metal can not be directly transferred to the case of composite materials because several troubles appears in the products. To obtain the guide to the design of the die for composite materials, it is necessary to investigate the flow state of the materials in the die during the molding process and obtain the fundamental data. In order to characterize the now states of BMC, linear colored marks made of the same materials were buried in each lamina at a definite interval to obtain finite displacement vectors by measuring the location of marks before and after the molding process. Deformation diagrams were drawn from the state of each lamina. In this paper. the dependence of flow state of BMC on the charge pattern was considered. At first, the experiments were carried out on the materials prepressed well or not well. Nextly the effect of various charge pattern on the flow state of BMC was examined. The results indicate that the now state of BMC prepressed well shows anisotropic nature exceedingly. In the case of Charge type A a complicated flow state can be seen at the small value of charge ratio. Charge type A is possible to prevent the troubles in comparison with Charge type B.
社団法人日本材料学会の論文
1983-09-15