Shanghai Daoqin Plastics Co., Ltd.

         large 家都知道, cold water machine application 广泛, its in has application is plastics mold cooling, basic upper large separation plastics mold production 厂都必不 can less cold water machine this equipment, therefore in toward detailed introduction in mold production in how to selection combined cold water machine. another is injection molding machine 经常会 and cold water machine use, therefore in difficult has introduction.

        一． how to cold water machine

        事实 upper, mold is 一 换 hot device, hot amount melt plastics mold, again mold 传入不断循 ring cooling 介质——冰 water in, has very small separation 进入空 gas and injection molding machine pressure sheet/plate. 众 周知, plastics molding cycle, versus large separation used for cooling, has can to plastics molding cycle 80% above, therefore will cooling time control to most small is for necessary. 例如, mold molding cycle generally 耍20秒, will cooling water water use cold water machine generate water cooling, it can shrink short to 16秒. tube/pipe most selection cold water machine need high, it can make output/production volume improve/increase 20%, in long production in, can very large 收益.

         that 么, how to selection water can amount 呢? from upper 面我们即 can 知道, it and molding material specific heat capacity, 熔胶时 temperature degree, weight and products demolding temperature degree has 关.

         generally injection molding mold cooling, water pressure selection 0.1——0.2Mpa, can meet/satisfy requirements, micro electrical full function cold water machine can meet/satisfy this requirements, pressure requirements high 于0.2Mpa时, 需另行规划, using/adopting versus pressure water meet/satisfy system water need.

        流 amount and tube/pipe between table/sheet:

        一副 mold 需 冰 water can amount 之计算公式 is: 　q=w×c×t×s

        公式 in: q is water can amount kcal/h;

        w is plastics raw materials weight kg/h;

        c is plastics raw materials ratio hot kcal/kg℃;

        t is temperature degree and products demolding temperature degree 差℃;

        s is safety 系数(generally 取1.35——2.0), mono machine 匹配时, generally selection small value, 而当一台 cold water machine and more mold versus 配时取 large value, selection cold cold water machine 时, s也应适当选 very large 一点.

        例如: mold production pp products, small production amount 约50kg, cooling need amount is how much? more large cold water machine is combined 适?q=50×0.48×200×1.35＝6480（kcal／h）; small 时需6480kcal／h cooling amount, can selection ls203s cold water machine can.

         in selection cold water machine process in, very difficult comparison data. according to 我们以往 more year 规划, sleeve/set sales experience, t=200℃, it is more commonly used products more year statistics rear 一 平均 value.

         if mold upper has hot 胶道, also will hot can amount add cold amount 计算, generally hot is 以kw is mono 位, 计算时应 will mono 位转换 formed kcal/h, 1kw=860kcal/h. if to factory water amount 充足, temperature degree relatively low, cost relatively low, 此时就不 need use cold water machine, this generally is 不太现实, remove non factory can in water temperature comparison low large 湖边;另一 types is utilizing deep water meet/satisfy temperature degree and amount need, 但往往 cost high. for plant/unit can use this type of methods, for/regarding factory, this is 不切实际.

        二．冰 water temperature 差

         plastics mold cooling 流体(冰 water) temperature degree generally made processing material and products 形状而发生 relatively large 变化, polystyrene (PS) thin 壁烧杯, mold requirements water temperature degree in 0℃ below/following;而 its it large more 数情况 lower, mold requirements water temperature degree in 5℃ above, micro electrical full function cold water machine can provide 5℃ above water, low temperature type can temperature cold water machine can meet/satisfy 5℃ below/following and 至0℃ below/following requirements.

         plastics mold export water temperature 差往往 is according to products requirements setting, in many lower, temperature is 3-5℃时 is most 理想, has need temperature in 1-2℃. temperature small, 意味 同样 hot amount belt/tape 出, need water amount large, need amount small. ratio 如: temperature is 5℃时, amount need 60l, to temperature is 2℃时, amount need 150l.

        三, water amount

        一副 plastics mold 需 冰 water amount and mold need belt/tape hot amount and water mold temperature has 关. 例如: need will 6480kcal/h hot amount from mold upper belt/tape 走, temperature is 3℃, that less need amount is how much?冰 water amount q=6480÷3÷60=36(l/min).

        四, water water 质 理论

         water soft 化, in use cold water machine process in, is 一 不 can overlook issues, for water ph value need 不断 观测, most 佳ph value and other 于7, large 于7 ph value generate can 怕 腐蚀 phenomenon, 如不采取 measures, in device, mold inner 生垢, thermal insulation function, heavy 时, make its can amount 转换效果 reduce 30%. very obvious this requirements for hard water soft 化. most has methods, can in system in 配置一台 electronics hard water soft device, this soft device is 以离于交换 principle design made as. according to amount different can different specifications soft device, 直接连接 in ring water tube/pipe in, generally has water soft device use 也不会太 high, can 定期间循 ring system in add 入一定 ratio/proportion remove agent.

        五．冰 water machine amount, pressure

         generally injection molding mold cooling, water pressure selection 0.1——0.2mpa, can meet/satisfy requirements, micro electrical full function cold water machine can meet/satisfy this requirements, pressure requirements high 于0.2mpa时, 需另行规划, using/adopting versus pressure from water meet/satisfy system water need.

        六． liquid pressure and material material cooling

         usually liquid pressure and material material using/adopting cooling water water cooling, is this not only is most methods, mono production cost, is 极经济, remove non for its temperature degree has requirements, can use water for its cooling.

        七．冰 water pipeline temperature

        冰 water pipeline must 进行保 temperature thermal insulation, is pipeline thermal insulation not only can retardant cold amount heavy loss 失, but also retardant in tube/pipe outer upper formed water. 例如: water temperature degree 10℃, ring temperature degree is 30℃, 一根25米 long, surface is 25m2 metal pipeline hot can 达750kcal/h, this more is 3hp pressure shrink machine generate made cold amount 10%, 5hp pressure shrink machine generate made cold amount 6% left right.

         cold water machine and plastics mold 连接, usually using/adopting reinforcement tube/pipe 连接, is this 样 胶 tube/pipe its 本身就 has thermal insulation function, long degree ultra- 5m, need 考虑适 degree temperature thermal insulation property. in cold water machine use in and another equipment related, that is injection molding machine, that 么既然关联 this large, that how to injection molding machine 呢, lower let is introduction:

         how to cold water machine and injection molding machine?

         Domestic 立式, injection molding machine in positive ring temperature degree use lower, water cold cold water machine dispersion hot water cold temperature degree in 35 degree below/following, (风 cold cold water machine cold temperature degree in 43 degree below/following)时 匹配.

        A.第一 types methods:

        1hp water cold cold water machine can 配80吨 clamping force injection molding machine temperature degree control in 5-10 degree;

        1hp water cold cold water machine can 配100吨 clamping force injection molding machine temperature degree control in 10-15 degree;

        1hp water cold cold water machine can 配120吨 clamping force injection molding machine temperature degree control in 15-20 degree;

        (附风 cold cold water machine is water cold cold water machine 0.8倍,即1HP风 cold cold water machine can 配64吨 clamping force injection molding machine temperature degree control in 5-10 degree.)

        B.第二 types methods:

        1HP water cold cold water machine can mono injection molding amount is 10 QZ injection molding machine temperature degree control in 5-10 degree.

         injection molding amount 1QZ=28.5g

         above is summary 出 结果. remove use above outer, business 员应考滤实际情况, selection combined cold water machine.

        C. cold water machine and cooling water 塔 匹配:

         according to 以往 实际经念1HP cold water machine demand 一台1.2 cold cooling water can belt/tape cold water machine generate hot amount.