Shanghai Daoqin Plastics Co., Ltd.

        今天, industrial product and day 常消费 product 款式造 type 千变万化, 消费者希望 product design 精巧, outer 形美观, in meet/satisfy market demand front lower, production 厂家也千方百计 improve/increase production efficiency and product use lifespan, increase property and use property. 由此, di color injection molding product 应运而生. 另一方面, innovation injection shot molding and mold structure design technology 也进一步推进 di color injection molding application.

         di color injection molding brief introduction

         di color injection molding (Bi-color injection), 顾名思义, is use or above injection system, will different product types (or different color) plastics rear or meanwhile injection molding. di color injection molding machine and injection molding machine different in 于, remove has material tube/pipe outer, also need can make mold 动模(more 模-转盘式) or type parts (mono 模-转轴式) achieve machine 构. therefore, di color mold in structure design upper difficult degree and precision property requirements high 于普通 mold.

1- clamping 油缸;2-塑化 injection plant/unit;3- material 斗;4-定模;5- mold sheet/plate;6-动模

         due to made parts design and demand different, di color injection molding machine molding process methods and molding process comparison more 样化. Common type 芯旋转式 di color injection molding machine (见图1) is 例, molding process lower: 1) clamping, A raw materials 经A material tube/pipe small type in molding one-time product;2) mold opening, sheet/plate 旋转180 degree, clamping, one-time product large type in formed is parts;3)B raw materials 经B material tube/pipe large type in molding di color product, and meanwhile, steps 1)同步进行;4) mold opening ejection di color product, 动模旋转180 degree, clamping, formed one-time injection molding cycle. utilizing this technology, can improve/increase production efficiency and product design degree. 牙刷手柄, automotive inner use adjustment and other using/adopting this type of molding methods.

         di color injection molding material selection key/critical

         di color molding made parts and mold design upper has very more need attention/notes 方, if di color material is types (different color), that in material selection upper has very more precautions (见图2).

        1, types material melt temperature degree has 一定 差异. injection molding one-time material melt temperature degree need high rear injection molding material, anti 止出现“冲花” phenomenon, 即二次 injection shot 时, material melt will already molding, solid one-time product melt 化.

        2, types material must has relatively good versus property, necessary also can in upper increase 设凹槽, and other increase combined strong/high degree.

        3, di color injection molding in mold runner generally comparison long, therefore material need tool relatively good heat stabilized property and processing flow property, molding process in in runner inner time long formed degradation, generate silver streaks and and other appearance defect.

        4, design product and mold structure need 考虑两 types material between sink marks rate 差异, combined material melt temperature degree and other factors, material selection.

         di color injection molding application

         di color injection molding product large can separation is below/following types type type.

        1, product function need separation 区域透 light. automotive 开关, machine 按键, and other. material selection 方面, transparent separation generally is transparent PC, if light 区域面积 relatively large, can selection dispersion light PC, improve/increase light 区域 质感, let light more and. types material can according to different heat resistant demand, selection ABS or 者PC/ABS, as is injection shot material.

        2, provide 舒适 手感. 例如牙刷, 鼠标, tool 手柄, machine housing/shell, toys and other using/adopting soft 胶, improvement 手感. commonly used soft has TPU and TPE, hard separation material selection relatively more, ABS, PC, PC/ABS, PP and other. need according to melt temperature degree high low, molding rear 顺序.

        3, product separation electroplating, separation outer 露. Common has machine 按键, automotive inner trim parts and other, 美化造 type meanwhile can reduce cost. electroplating separation use ABS or PC/ABS, need electroplating separation use PC or other material can electroplating material.

        4, function. di color or cosmetic parts Logo, appearance meanwhile can 避免Logo or by scratch 掉.

        5, increase design 感, meanwhile improve/increase made parts surface resistant scratch, weather resistance can. automotive lamp covers, table/sheet frame, in sheet/plate, and other home appliances outer housing/shell, 开关按键灯 and other. large more made parts type is “ di 层”, inner use is belt/tape color material, table/sheet cover/cap transparent PMMA or high weather resistant PC. using/adopting this type of design can through 底层材 material color and design achieve very more 意想不 to appearance 效果.

         application separation 享

         certain Brand 空调面 sheet/plate, design is white material and transparent material di color molding, another inner white material requirements relatively high degree, light transmittance requirements is 6% left right (1.4mm). due to made parts comparison large, material selection for material processing flow property and heat stabilized property requirements relatively high. outer material selection transparent PMMA, inner material 尝试 普通PC and heat resistant ABS and other solution/scheme, 但普通PC processing flow property good, internal stress large made parts deformation; heat resistant ABS容 easy by PMMA冲 melt. most 终, through Kumho day high 亮白PC202 very good solution issues. through more 次尝试, most inner material selection Kumho day high 亮白PC202 very good solution issues.

        结语

        随 injection molding machine 械, mold and control technology water development, 伴随人们 for injection molding products quality and appearance requirements 越 越 high, di color injection molding will day 臻完善, to more add application.