Shanghai Daoqin Plastics Co., Ltd.

        1. LCP material process (liquid crystal polymer (LCP))

         focus/key point: LCP material use front dry, temperature degree 约150℃ left right, time 约4~6 small 时, remove wet rear LCP material water separation content in 0.02% below/following, maintain in -35 ℃.

         attention/notes: 建议 drying machine selection true remove wet drying machine, need use generally drying machine. true remove wet drying machine can will LCP material in water separation 抽出, generally drying machine can will material in water separation full 抽出, relatively difficult to products requirements quality.

        2. LCP material injection molding process

         molding attention/notes lower issues:

        ① using/adopting ratio/proportion back pressure make add material more 精确, stability;

        ② large products can use back pressure large, small products back pressure small;

        ③ large products if back pressure small, density versus for relatively small, surface gloss degree relatively 差;

        ④ high degree injection shot system and 自动V-P(V injection shot pressure, P holding pressure pressure)转换 function, make products precision stability, in has need lower (ratio products non precision), in mold cavity gate 处安装 pressure device, make V-P切换 more 接近实际;

        ⑥ 啤平面 products holding pressure time generally can long, 否则容 easy products warpage deformation generate force;

        ⑦ LCP material in material tube/pipe in time long or 者残留 amount more easy make LCP material 火, products surface has bubbles, generally material tube/pipe 熔胶结束3秒 inner mold opening, amount ensure in 5mm以 inner;

        ⑧ if machine again machine will waste material injection shot;

        ⑨ molding cycle 取决于 products large small, 形状, thick thin, mold structure and molding conditions. LCP material tool has good flow property, therefore filling time comparison short, crystallization molding speed degree relatively fast, therefore molding cycle comparison short.

        3. LCP material specialized injection molding machine selection overview

        必 must selection LCP material specialized injection molding machine;

         screw need use wear resistance relatively 佳 材 material manufacturing;

         screw use can anti 止逆流 structure;

         need relatively precision temperature system;

        射嘴部 separation need especially design;

         add material and injection shot system reaction need 灵敏;

         injection shot material tube/pipe amount need attention/notes combined products weight, can more or less.

        4. LCP material specialized mold process focus/key point

        ① LCP products mold design very key/critical, mold 进胶口应 using/adopting 普通开放嘴, using/adopting hot 嘴, if use hot products easy 起泡, temperature degree high easy product 火.

        ② generally mold temperature degree in 140℃ left right ﹐ upper (front) mold temperature degree high lower (rear)模, upper (front) mold temperature degree high melt flow property good easy formed cold 胶, lower (rear) mold temperature degree low products easy crystallization molding, upper (front) lower (rear) mold temperature ultra- 15 ℃.

        ③ in mold temperature selection 方面, is shrink short molding cycle, anti 止披锋, selection relatively low mold temperature; if requirements products dimensional stability high, decrease/reduce generate and short shot and other issues 时, selection relatively high mold temperature.

        5. pressure and speed degree

         most combined pressure must 取决于材 material, products 形状, mold design (especially is gate, runner, gate) and other molding conditions. is LCP无任何 product grade its melt viscosity is non low, therefore pressure ratio generally hot can property resin need low.

         molding rigid 开始时 using/adopting low pressure, rear slow slow increase pressure, this is types comparison good methods. large molding product in 15MPa-45MPa pressure lower can molding. another, LCP solid time comparison fast, therefore speed degree fast easy to good 结果.

        6. molding cycle

         molding cycle 取决于 molding product large small, 形状, thick thin, mold structure and molding conditions. positive upper 面 说 that 样LCP tool has good flow property, therefore it filling time comparison short, solid speed degree comparison fast, therefore can to relatively short molding cycle. table/sheet property molding cycle is 10秒-30秒.