注塑成型与模具知识(ppt31)-五金塑胶(编辑修改稿)

注塑成型与模具知识(ppt31)-五金塑胶(编辑修改稿)内容摘要：

sure 注射压力 Pack Pressure 保压 Clamp Tonnage 锁模力 Cushion 缓冲料垫 g Model of Amorphous Polymers Adding Heat Increases Space 外热提供空间 Between Molecular Chains 在分子链之间 Raise Temperature of Polymer T G Locked 固态 Entanglements Stiff Flow 难于流动 Easier Flow 较易流动 g Melt Temperature 熔融温度 35 30 25 20 15 10 5 0 .030 .060 .090 .120 .150 .180 .210 .240 Wall Thickness in Inches壁厚 (In) M e l t F l o w (in.) LEXAN?101 550 deg F. 101 @ 600 deg. F Increased Melt Temperature yields increased However, Too High a Melt Temperature May Cause ,过高熔融温度造成降解 g How is heat added to the polymer? 外热如何作用于高分子材料 Electrical Heat: 电加热 Heater Bands 加热带 Mechanical Heat 机械热 Screw Speed 螺杆速度 Back Pressure 背压 Injection Pressure / Speed 注射速度 /压力 g Injection Molding Barrel Unit The Reciprocating Screw (Filling) Throat Heating Coils Nozzle Hopper Screw Barrel Force, Torque From Injection Unit 料筒组件 回转式螺杆 喷嘴 螺杆 加热 料斗 加料口 料筒 来自注塑单元的力和力矩 g Drying • Drying temperature and time are an important key factor for good products in our production 在生产得到好的产品， 干燥温度和时间是一重要因素 • Good Parts 良品 Typical Lexan (PC): 典型 PC Moisture Level: Less than % 121 0 C/3 ~ 4 Hrs 水分含量小于 % 121 0 C/3 ~ 4 Hrs Drying Temperature。