Shanghai Daoqin Plastics Co., Ltd.

         this is 一 经常遇 to issues, comparison easy solution. use process 手段确实 solution 不 时, can from mold design manufacturing upper 考虑进行改进, generally is can solution.  

         tips/techniques: 出现此 type issues 时, need injection molding 一边观察 injection molding machine screw 运动行程. especially need holding pressure formed and 熔胶完 formed screw 处 位置.   

        第一 types 情况: injection molding machine screw 熔胶位置达 to setting value, injection molding holding pressure formed 时位置 is 0（残余胶 amount is 0）. can can formed causes:   

        1, 漏胶. this type of 情况, 首先应立即检查 injection molding machine has 无漏胶; injection molding machine and mold sleeve/set between combined is 否漏胶. has 漏胶, product 不满胶则 is phenomenon, troubleshooting. has in 确认无熔胶泄漏 情况 lower, 才进行 lower 面 检查.    

        当 product 不满胶, also 无胶体泄漏时, can can is amount 不够. this need increase 熔胶行程, increase amount. increase 熔胶行程 rear need 继续一边 injection molding 一边观察 screw 残余胶 amount, 熔胶行程 and product 进胶情况.  

        2, amount 不够. increase 熔胶行程 rear, product increase, 说明胶 amount 不够, need increase 熔胶行程. 当熔胶行程达 to most large rear, product still 不满胶, need more large Model/Grade injection molding machine.   

        3, 胶介子漏胶. 如随 熔胶行程 increase, injection molding product amount has versus increase, can can is injection molding machine 胶介子漏胶.  

        检查 胶介子漏胶 methods: certain injection molding ring product mold cavity inner, use 手动射胶. injection molding pressure small large, screw front amount can 判断 胶介子 漏胶情况. 手动射胶时, screw front 进, 说明 胶介子密封良 good, 不漏胶. in relatively large injection molding pressure lower, screw has less front amount, is 允许, 此时不 is 熔胶泄漏, is 熔胶受 pressure types shrinkage 致.  

        凡 is product 不满胶 情况, 首先必 must injection molding machine 炮筒, injection molding machine mold has 无漏胶 情况发生; its is injection molding machine screw front 端 胶介子 has 无漏胶. has troubleshooting this types rear, can its it 方面 判定, lower 面 判定 methods, is in troubleshooting this types rear lower, again as 累述.   

        第二 types 情况: injection molding machine screw can to setting 熔胶行程, 但达不 to setting injection molding 行程(has 残余胶 amount). this type of 情况即 is 说: in has 熔胶, 但射不进 mold cavity.   can can formed causes:  

        1, flow property 不够.

        熔胶 flow property 不够, flow retardant force large, difficult 以充填 to mold in. this type of 情况, also can can is lower causes formed:  

        a) raw materials flow property 差; 

        b)炮筒 processing temperature degree low or temperature degree has to setting value, temperature degree 显示不 true 实.  

        c) mold temperature degree low, although in flow property good, 但流入 to mold runner in rear, drop temperature fast, in mold runner in mold cavity in flow property 差, 导致充胶不满.   

        2, injection molding process parameters 设置不当.

         injection molding pressure low, 胶体不 can 克服充胶 retardant force; injection molding speed degree low, 充胶时熔胶 cooling time long, flow property reduce, 导致充胶 retardant force large; injection molding holding pressure time short, product 未充满 front 就停止充填 and other, 都会导致 product 不满胶.   

        3, 充胶通道堵塞.

         due to cold 胶, or its it material 质堵塞充胶通道而导致充不 胶, 也会导致 product 不满胶. need injection molding machine 射嘴, runner, separation runner, gate and other is 否畅通, has 堵塞则 need dry 净.  

        4, mold system has defect.

         mold system defect also separation is lower several 方面:  

        a) runner small, thin or long, increase retardant force; 

        b) runner, gate coarse has 伤痕, or has 锐角, surface coarse degree defect, effect/influence material 流不畅;

        c) cold material 井设置不当 or 未设置, cold 胶收集不完 full, runner or gate 堵塞; 

        d) gate or amount 设置不当, retardant force large injection molding pressure, 胶体充不进 mold in; e) mold gas defect or gas 位置设置不当, mold local gas product 充填不满.  

        5, product design defect.

         product structure design defect, design non-uniform, local 胶位太 thin, product filling 不满.