Shanghai Daoqin Plastics Co., Ltd.

        我们知道, runner, separation runner and gate function is will plastics melt from injection molding machine nozzle in 输送至各 type 腔. system material can powder rear again use, this is 确实, tube/pipe 如此, due to material in 就意味 injection molding machine production force reduce, is system separation material material must in injection molding machine machine 筒里塑化. relatively small parts 说, system material can can 占实际 injection amount 50 or more more 一.

        主 runner

        主流遭 can as is nozzle in mold in 延续. in mono type mold in, 主浇道直接通 toward parts gate is gate.

         mono type injection mold production force usually is runner cooling time 决定. remove for runner sleeve/set provide cooling outer, runner sleeve/set upper material most small 直径应尽 can can small, and also can 适时充满 type 腔.

        但 in has suitable 规律, is type 腔 充满 is 取决于诸 more factors.主 runner has 1.5· demolding degree. demolding degree relatively large, can make runner from runner sleeve/set easy 脱出, is runner relatively long 时会导致 its relatively large, therefore need comparison long cooling time. injection molding machine nozzle export 直径应 ratio runner sleeve/set most small small 0.5mm, this in runner 顶端不会形 formed 凹槽妨碍主 runner material 脱出.

         separation runner

         in more type mold in, plastics melt must through in mold separation type upper separation runner 注入各 type 腔. suitable for runner basic 规律同样也 suitable for separation runner 横断面. also has 一 附 add factors must 考虑, separation runner 横断面也 is its long degree 函数, is can false separation runner in pressure loss increase large less is and separation runner long degree formed positive ratio.

        而 more semi pressure loss will more large, is its 横断面 due to runner plastics melt solid decrease small, but also runner 距离越远, pressure loss more large. another runner and separation runner system loss consumption raw materials and injection molding machine amount, therefore separation runner can can design short, 横断面应尽 can can most small. separation runner long degree is mold type and type 腔 几何排列决定.

         separation runner 横断面 形状

        因圆形断面 separation runner surface most small, versus for/regarding separation runner 断面积 hot loss most less, 故应尽 can can using/adopting 圆形断面 separation runner. in 圆形断面 separation runner in 心 熔 material most rear solid 化, in holding pressure pressure function lower, plastics melt can 沿 圆形断面 separation runner in flow most long 距离. from gate (separation runner and type between 一段)应 this design, material 由圆形 or 矩形断面 separation runner in through gate type 腔.

         in runner most small 断面处, due to plastics melt flow scratch, make gate 周围钢材 local add hot, this 样, in holding pressure pressure function lower, in gate solid front, melt can in relatively long cycle inner 继续注入 type 腔, to shrink function.

        当平 slip surface and separation runner between must has 移动时, can using/adopting 圆形断面 separation runner. in this type of lower, can using/adopting semi 圆形槽 separation runner. this type of advantages is: in sheet/plate processing separation runner. however, semi 圆形槽 separation runner its rate semi and cationic 形断面 separation runner versus meanwhile, semi 圆形槽 separation runner nano raw materials need ratio separation runner more 12.5 above.