塑料件注塑基本知识精品文档.pptVIP

Sprue Bushings Sizing Draft (1.5° - 3.5° Per Side) Pullers Coldwell A sprue bushing is the entry port for injecting resin into the mold PAGE * Undercut Ring Ball Puller Z Puller Reverse Taper Designed to pull the sprue from the sprue bushing when the mold is opened Sprue Puller PAGE * 浇口设计 流动的分布需均匀 开在最厚的部分，以便保持最大的保压 浇口应设计到熔体最后冷却的地方 注意玻纤排列方向的影响 PAGE * 浇口的类型 针点式浇口 潜伏式浇口 边缘浇口 扇形浇口 平缝式浇口（薄片浇口） 圆环形浇口 PAGE * 浇口的类型 轮輻式浇口 爪浇口 护耳式浇口 直浇口 PAGE * 浇口的类型 Tunnel / Sub Edge Pinpoint PAGE * Hot Manifolds PAGE * Hot Manifolds Hot manifolds systems: Provides heated passage to mold cavity Allows 15% to 20% faster cycles Eliminates sprue runner scrap Improves part quality Reduces molded-in stress PAGE * Externally Heated Manifold AIR GAP INSULATES MANIFOLD FROM PLATES UNIFORM TEMPERATURE ALONG MELT CHANNEL EXTERNALLY HEATED UNRESTRICTED FLOW LESS PRESSURE DROP EASIER MAINTENANCE Courtesy of PAGE * Hot Manifolds Heater Probe Melt Channel Cooling Plug Locator Ring Heater Manifold Pocket Melt Channel Heater Cooling INTERNALLY HEATED EXTERNALLY HEATED PAGE * Hot Manifolds Externally heated hot runner systems are recommended: Reduce pressure drop Reduce shear and thermal history Prevent burn and brown streaks Ease changes in color or material Facilitate purging PAGE * Valve-Gated Hot Manifolds CYLINDER PISTON VALVE PIN SPRUE BUSHING MANIFOLD INSULATOR INSULATING AIR GAP NOZZLE HOUSING NOZZLE TIP NOZZLE HEATER MANIFOLD PLATE CAVITY PLATE PAGE * Hot Manifolds Manifold sizing Streamlining Tip design Stand-offs/insulation Controls PAGE * Hot Manifolds BALANCED MANIFOLD UNBALANCED MANIFOLD PAGE * 分型抽芯机构 手动侧向分型抽芯 机动侧向分型抽芯 弹簧，斜导柱，弯销，斜导槽，锲块，斜滑块 液压／气动侧向分型抽芯 PAGE * 分型抽芯机构 PAGE * 模具模拟动画八 　 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 　 上一个　　　返　回 　 分型抽芯机构 PAGE * Cooling / Heating Water is typically used to heat or cool mold Uniform mold temperature is critical t