| 摘要 |
PURPOSE:To enable to open a mold by an extraordinarily small force and extremely facilitate the mold splitting work by forming a unmber of micor-pores or cracks on a surface forming a polymer material and filling the polymer material and non-adhesive resin in said pores or cracks. CONSTITUTION:A mold 31B is made of aluminum alloy, and a hard anodized aluminum oxide layer 33 of approximately 50mum thickness is formed on tis forming face being in touch with forming resin. Said hard aluminum oxide layer 33 is provided with a number of porous micro-pores 35, and tetrafluoroethylene resin 37 is filled in said micro-pores 35, and the surface is formed in the smooth state. Said tetrafluoroethylene resin is provided with the characteristics to be hard to adhere to crosslinking polyethylene formed as a connecting section insulated body. That is, non-adhesive tetrafluoroethylene resin 37 is dispersed all over and exposed on the forming face of said mold 31B, and the adhesive properties with forming resin for the whole of forming face gets weak. |
