Shanghai Daoqin Plastics Co., Ltd.

        一.浇注 system formed

        普通 runner system (Runner System), as system, or is system, is melt plastics injection shot machine 射嘴(Nozzle) to 模穴 必经通道. runner system 包括主 runner (Primary Runner), separation runner (Sub-Runner)以 and gate (Gate) and other.

        1.主 runner

        也称 as 主浇道, 注道(Sprue) or 竖浇道, is injection shot machine and mold runner sleeve/set 接触 部 separation 起算, separation runner is runner. separation is melt plastics mold rear most 先流经 部 separation.

        2. separation runner

        也称 as separation or 次浇道. mold design, can again separation is separation runner (First Runner)以 and separation runner (Secondary Runner). separation runner is runner gate 间 渡区域, can make melt plastics toward obtain 平缓转换; for/regarding more mold, meanwhile tool has uniform separation plastics to 各模穴 function.

        3. gate

        也称 is material 口, is separation runner and 模穴间 狭 small 通口, is most is short small thin separation. its function in utilizing shrink flow make plastics to accelerated 效果, high rate can make plastics flow property good (due to plastics 切变致 dilute features);黏滞 add hot rise temperature 效果也 has improves material temperature, reduce degree function.

         in molding rear, gate most solid 化封口, has anti plastics 回流, and 避免模穴 pressure decline fast, make molding product generate shrinkage function. molding rear, 则方便剪 remove, separation runner system and parts.

        4. cold material 井

        也称 as cold material 穴. in 于储存补集充填初始 stage/phase relatively cold plastics front, anti cold material 直接进入模穴, effect/influence quality or gate. cold material usually in runner 末端, separation runner long degree relatively long 时, in 末端也应开设 cold material 井.

        二.浇注 system design basic 原则

        1.模穴布置(Cavity Layout) 考虑

        1)尽 amount using/adopting balanced 式布置(BalancesLayout);

        2)模穴布置 and gate force for 称, anti mold force generate 偏载, 而发生撑模溢 material issues;

        3)模穴布置尽 can can 紧凑, shrink small mold dimensions.

        2. flow 导引 考虑

        1) can 顺利 引导熔 melt plastics 填满模穴, generate 涡流, can 顺利排 gas;

        2)尽 amount plastics positive impact relatively small type and metal parts, anti type 芯位移(Core Shift) or deformation.

        3. hot amount dispersion and pressure drop 考虑

        1) hot amount loss consumption and pressure drop small good;

        2) process/workflow need short;

        3) runner 截面积 need large;

        4)尽 amount runner and 突然改变流 toward (以圆弧角改变 direction);

        5) runner processing surface coarse degree need low;

        6) more 点进浇 can reduce pressure drop and pressure, has combined issues.

        4. flow balanced 考虑

        1)一模 more 穴(Multi-Cavity)充填时, runner need balanced, amount make plastics meanwhile 填满每一 模穴, ensure 各模穴 molding product quality property;

        2) separation runner amount using/adopting balanced 式 布置 methods (Naturally-BalancedLayout);

        3)无 method balanced 时, using/adopting balanced method balanced runner.

        5. waste material 考虑

         in can 顺利充填 meanwhile effect/influence flow and pressure loss consumption front lower, decrease small runner 体积(long degree or 截面积 large small), decrease/reduce runner waste material generate and recycling use.

        6. cold material 考虑

         in runner system upper design cold material 井(Cold SlugWell), material 槽, 以补集充填初始 stage/phase relatively cold plastics front, anti cold material 直接进入模穴, effect/influence quality.

        7.排 gas 考虑

        应顺利导引 plastics 填满模穴, make inner gas 以顺利逃逸, 以避免包封烧焦 issues.

        8. formed product quality 考虑

        1)避免发生 short 射, flash/burrs, 包封, combined 线, flow marks, 喷流, residual stress, warpage deformation, 模仁偏移 and other issues;

        2) runner system process/workflow relatively long or is more 点进浇(MultipleGating)时, due to flow balanced, holding pressure or is non-uniform shrinkage formed product warpage deformation issues add anti 止;

        3) product appearance property good, remove gate 方便, gate 痕(Gate Mark)无 loss parts appearance and application.

        9. production efficiency 考虑

        尽 can can decrease/reduce rear processing, make formed cycle shrink short, improve/increase production efficiency.

        10. ejection 点 考虑

        需考虑适当 ejection 位置, 以避免 formed product demolding deformation.

        11. use plastics 考虑

        黏 degree relatively high or L/t comparison short plastics, use long or small dimensions runner.