S1304-2-2 成型ゴムと金型表面の離型性に及ぼすEBポリッシングの効果([S1304-2]微細放電加工およびその他の加工法)

抄録

In compression molding or injection molding of rubber products, small piece of rubber material sometimes remains on the metal mold surface after releasing the product because of strong adhesion of rubber to the surface. Therefore, cleaning of the metal mold surface is often needed, which makes the molding cycle time longer and the life time shorter. On the other hand, in EB polishing method developed recently, a large-area surface of metal mold can be instantly finished with small surface roughness less than 1μmRz. In addition, surface modification effect is greatly expected since thin resolidified layer is formed on the surface and the surface structure may change. In this study, the separation forces between molded rubber and metal mold surface are measured with tensile tester. The metal mold surfaces are treated by various surface coating and surface modification methods including EB polishing, in order to evaluate the releasability.