Shanghai Daoqin Plastics Co., Ltd.

         from 1935 year Germany machine manufacturing 商Paul Troestar production used for thermoplastic property plastics extrusion machine, 历经八十余载 light anionic, extrusion machine achieve breakthrough property 进展, more is plastics industrial development. year, 随 越 越 more plastics products by use in 人们生 active in 各方面, high energy saving extrusion machine formed is 时代 “ new 宠”.

         extrusion machine function is through will solid plastics add hot 熔化, screw compression molding rear, 并送至 lower process process. in this process in, extrusion machine add hot system good bad 显 尤 is important!

         extrusion machine add hot system structure large separation is screw, machine 筒, add hot device and gas system formed. add hot device as is extrusion machine add hot system structure separation, for/regarding extrusion product production quality and efficiency provide important function.

         in extrusion machine development process in, rear 出现 4 in add hot methods: hot add hot, electrical retardant add hot, electrical add hot, outer add hot. small to large detailed 扒一扒!

        载 hot add hot

         utilizing hot 体(如蒸汽, and other) as is add hot add hot methods is hot add hot. due to using/adopting hot different, also can separation is liquid add hot and add hot. liquid add hot use add hot 介质, in low 于200℃时 use material 油, high 于200℃时, generally using/adopting has machine solvent agent or its mixed combined material. add hot use is 蒸汽.

         disadvantages : requirements add hot system 密封良 good, 以免因 liquid 体 渗漏而 effect/influence to product quality; meanwhile also need 配备一 sleeve/set add hot ring plant/unit, this improve/increase equipment cost; use hot 体(如 has machine solvent agent)因受 hot separation understanding belt/tape has property and property; another plant/unit repair 也不方便, currently very less using/adopting.

        蒸汽 add hot its pressure very difficult 维持一定 value, 且波动也 relatively large, its temperature degree difficult to process requirements, but also also 需配备一 sleeve/set 专门 蒸汽 equipment, this for/regarding many factory is very difficult to, therefore very less using/adopting.

         electrical retardant add hot

         using/adopting electrical retardant filament add hot machine rear again hot to material material upper, machine also is tool has thick degree 筒体, therefore in machine 筒 径 toward direction upper formed relatively large temperature degree degree, 如图1 示. another, use it add hot need relatively long time. meanwhile, use sheet/slice as insulation material electrical retardant add hot device, its electrical retardant filament easy oxidation and other, make its lifespan shrink short. due to need use a large amount of sheet/slice as insulation material, add hot device cost relatively high.

图1 electrical retardant add hot device and add hot device add hot machine temperature degree degree

         in electrical retardant add hot device in, has types add hot device aluminum add hot device, its structure 如图2 示. it is will electrical retardant filament metal tube/pipe in, 并填进 oxidation powder type insulation material, rear will metal tube/pipe aluminum alloy in. although 省 云母 as is insulation material reduce production cost, is add hot temperature degree scope/range is 350～370℃. requirements more high temperature degree, need using/adopting iron or copper add hot device. in production in, frequency more add hot device increase large production cost.

图2 铸 aluminum add hot device

1—接线柱 2—钢 tube/pipe 3— electrical retardant filament

4— oxidation powder 5—铸 aluminum

         electrical add hot

         through electrical magnetic in machine inner generate electrical 涡流而 make machine hot types add hot methods. 图3 示 is types electrical add hot device principle structure 图.

图3 electrical add hot device structure principle 图

1— silicon sheet/slice 2— cooling agent (water or gas) 3— machine 筒

4— electrical 流(machine upper) 5—线圈

         this type of add hot device is in machine outer upper 隔一定 间距装 upper dry outer 面包以主线圈5 silicon sheet/slice 1. will electrical 源通入主线圈时, generate in direction magnetic force 线, and in silicon sheet/slice and machine between formed 一 封闭 magnetic ring. magnetic 通发生变化时, in 封闭回路 in generate electrical 动势, from 而引起二次感应 electrical pressure and electrical 流, in ring electrical 流, electrical 涡流. in machine in to retardant force generate hot amount.

        不足之处: add hot temperature degree 会受感应线包 insulation property can made, this for molding processing temperature degree requirements comparison high material material is combined. its is it toward dimensions large, use in large type pressure machine upper 必然会 make machine 体积庞 large, but also need a large amount of silicon sheet/slice and other material. another, it in complex machine upper 安装也不方便.

        红 outer add hot

         and upper types add hot methods versus ratio, outer add hot is in recent years development 起 一项 new add hot technology. add hot principle 如图4.

图4

        传统 add hot through 接触传导 methods hot amount to machine 筒, its in has semi hot amount dispersion to gas in;保 temperature type outer add hot 圈, hot efficiency high, toward property can will hot amount 直接转换 formed machine upper temperature degree, hot amount dispersion 发. its appearance structure 如图5, 图6, 图7.

图5

图6

图7

         Shanghai electrical equipment formed sleeve/set has company 专注于塑 machine 自动化 control year, 专注于 plastics machine efficiency improves. can provide design environmental protection, add hot high 效 保 temperature type outer add hot 圈, can according to 客户厂房实际情况 provide from to rear 完整服务.  

图8: 现场安装工 as

        经 客户 use 反馈, 我们 出如 lower comparison data:

         efficiency production, especially is full competition 时代, efficiency more is 决定一 enterprise future. electrical 专注于 plastics machine efficiency improves, enterprise development 一臂之 force!