| 摘要 |
PROBLEM TO BE SOLVED: To minimize a disposal part after setting by shortening a molding cycle by a method wherein injection molding is carried out into a mini-sprue mold by using an epoxy resin composition having latent setting characteristics. SOLUTION: An epoxy resin forming a sprue 11 and a runner 12 of a manifold part always keeps a fluid state without being set, and is not taken out together with a molded product. After taking out the molded product and a minisprue part 20, the epoxy resin is successively continuously applied to injection molding. The mini sprue part 20 is a zone wherein the epoxy resin is cured, and only the mini sprue 21 which is taken out simultaneously as a set material when a set molded product is taken out is discarded. The epoxy resin has latent type setting characteristics of at least 1,000sec gel time at 70 deg.C and at least 12,000cal/mol activation energy of the reaction. |
