家长会班主任发言专利名称：VACUUM MOLDING MOLD 发明人：ARANAKA HIROMASA沼泽的意思
申请号：JP21353081reviewed
申请日：19811228
accordance>大写字母歌
公开号：JPS6261377B2
嶙峋公开日：
bye bye love19871221
专利内容由知识产权出版社提供
七年级下册>foodcurity摘要：PURPOSE:To vent gas from core print parts effectively and to prevent the blow hole defects of products by providing recess in the parts for supporting the core print of a casting mold, and punching many vent holes in shielding films for air permeation facing said recess. CONSTITUTION:Recess 9 are made at the center in the supporting parts for the core print 7 of a master mold 8, and vent holes 6' are punched in the vinyl films is facing said recess 9. In the stage of inrting a core, the holes 6' remain without clod; at the same time, a core 5 can be supported firmly. The recess 9 to be made in the mold 8 are provided by providing projections 10, 10' in the middles of the side faces 7a, 7a' of the core print in the stage of manufacturing the casting mold, providing projections 11 at approximate center of a end face 7b and a bottom face 7c, transferring the same to the shielding films for air permeation 1 in the stage of suction molding, and using the core print 7 parts having no projections, 10, 10', 11' in the stage of tting the core 5.
申请人：KAWASAKI STEEL CO
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