Shanghai Daoqin Plastics Co., Ltd.

         issues:

         gears injection molding parts mold gas attention/notes what issues?

        回答:

         mold cavity gas methods very more, 但每一 types methods must ensure: gas in gas meanwhile, its dimensions design can anti material material 溢进槽 inner; its also need anti 止堵塞.

         therefore, from mold cavity inner surface toward mold cavity outer direction amount, long 6-12mm above gas separation, high degree need large 约0.25-0.4mm. another, gas amount more is has 害. is, if function in mold cavity separation type 面未开排 gas separation pressure very large, easy mold cavity material cold or 裂开, this is very 危险.

         remove in separation type upper for mold cavity gas outer, also can through in system material 流末端位置设排 gas 槽, and ejection 杆四周留出间隙 methods to gas 目, is gas deep degree, wide degree and selection, if 不适当, generate flash 毛刺, will effect/influence products and degree. therefore, upper 述间隙 large small anti ejection 杆四周出现 flash is 限.

         this especially attention/notes is: gears this made parts in gas 时, can can most micro small flash is 不希望 has, this type made parts most good using/adopting below/following methods gas:

        彻底清 remove runner inner gas 体;

         use degree is 200# carbon silicon abrasion material for separation type combined surface 进行喷丸处理.

         another, in system material 流末端开设排 gas 槽, main/primary is separation runner 末端位置 排 gas 槽, its wide degree and other separation runner wide degree, high degree material 而异.