Shanghai Daoqin Plastics Co., Ltd.

        PC plastics injection molding process in issues small 结

        1, PC material rear can use 倒索 原故

        熔胶结束 rear 起倒索, screw toward rear 移动, gas by 抽进射咀之內 and high temperature PC material mixed combined in 一起. due to PC material easy 吸潮之原故, micro amount gas in water can make injection molding parts generate silver streaks 射纹.

         similar also has, transparent PVC熔胶也不 can 倒索. is transparent PVC non easy 烧胶, to gas 立即就会引起 chemical reaction, make injection molding parts generate 黃斑, generate many black spots.

         therefore, in injection molding PC material, or transparent PVC material 时, 熔胶完 formed rear need 倒索. is is process need large back pressure, also 导致射咀吐胶时, can 一点点倒, can remove 吐胶就 can, can again more, can let gas to 射咀之 in.

        2, PC parts water gas formed is injection molding difficult causes analysis

         in more transparent material in, ratio 如GPPS, K material, transparent ABS and PC material, PC parts is most easy in water generate gas marks, but also also is most difficult remove.

        因 is PC material flow property, in this material in versus for most 差, injection molding 时必須 use fast speed 射胶, 否则就容 easy material or generate 震紋. fast speed rear 果, is in water 口位置造 formed 因熔胶 fast speed type surface rear elastic formed micro gas, but also injection molding parts thick, gas 面积就越 large. due to material relatively high, make gas 位置 熔胶 surface by oxidation, in formed gas film, 將熔胶 and mold surface 隔离, from injection molding parts surface formed color gas 紋, effect/influence injection molding parts transparent degree.

        而 other transparent material flow property versus for good more, comparison easy type, easy generate 震紋, therefore speed degree can versus for relatively low, water 口位置 困 gas make in non light micro, therefore easy formed color gas 紋. make generate gas 紋, ratio easy remove, 我們 需 reduce 一点射胶 speed degree and pressure can it understanding 決, or material 問題也不会 generate, 而PC material need reduce speed degree 就不行, is 震纹就 is material.

         therefore, PC material water gas 紋問題, can is commonly used transparent material in most difficult remove, upper is injection molding difficult 題, 必須采取一 measures and machine tips/techniques has can can it understanding 決.

        3, PC parts and 起白雾 causes and its process issues

        几 year front, very less to PC material injection molding parts has issues. that is is use PC material comparison less, usually has Japan PC7025A and 1250Y两 types grade. production PC material 厂家越 越 more, and grade 自然也不 less.

         issues 跟 也就. various grade PC material injection molding technology process same, but also for process requirements 严格程 degree different, again use injection molding PC7025A and 1250Y injection molding process production other grade PC material, difficult 免就出 issues, can to PC injection molding parts has 时会经不起 impact property issues.

        经 仔 fine research 我們发现, due to various grade PC material heat resistant degree and material features different, temperature degree, 甚至连烘 material temperature degree degree and material time for injection molding parts impact resistant property can generate heavy large effect/influence.

         usually in production PC7025A and 1250Y material 时, temperature degree generally can 调至290 to 310 degree, production certain grade PC material 時, again use this temperature degree injection molding, injection molding parts 就会变 very 脆. therefore, for this type of PC material, injection molding temperature degree most good need ultra- 290 degree, has can can also need more low can solution property issues. therefore, need flow property 足够充 type, most good use more low temperature degree production, anti injection molding parts 变脆造 formed degree unstable.

         its is material temperature degree effect/influence. PC7025A and 1250Y usually can to 110至120 degree, time can ultra- 4 small 时. has grade PC material can ultra- 100 degree, injection molding parts 也会变 very 脆, but also also 会起白雾, effect/influence appearance and transparent degree.

        而 most easy 引起人 attention/notes, most easy issues, is material time. usually in injection molding PC7025A and 1250Y material 時, add 滿50公斤 烘 material 斗, need to water generate, slow slow production small 时都不会出 what issues. is has PC material in material in ultra- 4 small 时, injection molding parts 不但会 generate obvious 白雾, also very 脆, but also time long 就越脆, 白雾越 more, parts 变蒙. this 时, if material production 6 small 时, that can add semi material, if formed injection molding parts has water gas generate, need more add and 勤一点 add material, issues 就不会 again 发生. has 时, also 会时不时 has 几啤出现白雾, this is has raw materials by in material long 期烘烤, rear 时不时 has material to 炮筒, by mold 缘故.

         this is production in PC material injection molding parts 变脆, has 白雾 一 important causes. therefore need good various grade PC injection molding parts, attention/notes various grade raw materials injection molding process features and requirements is. 当然, various grade property can different, degree and impact resistant can force has different, has grade impact resistant can force very 差.

         therefore in in the future in, if PC injection molding parts 忽然出現脆 property issues and transparent degree 不足 問題时, can excellent from temperature degree and material temperature degree and time 方面 考虑, this can let less very more 弯路.

        4, long runner can decrease light PC parts and 震纹

         has is runner long, make in most front 面 熔胶 cooling more, from 而引至 injection molding parts generate and 震纹, 而PC material in this performance is 突出, its is transparent PVC.

         this is is has 时熔胶 temperature degree already rise very high, injection molding parts also is has remove or 震纹 缘故.

         this 时, if will runner 两端头各延 long cm, in most front already cooling low 溫熔胶就 can to long runner in, 不会流进 type 腔, defect to very good improvement. versus this methods for other plastics has improvement function, for PC and PVC material improvement is comparison obvious.

         therefore, 当你无论 how to machine can solution or 震纹 时侯, 不妨试试 this methods.