Shanghai Daoqin Plastics Co., Ltd.

machine 筒 喂 material large more using/adopting water cold, use method and 第二段筒体（ add hot ）锁定 in 一起, hot amount can from temperature degree high 筒体传导 to cold 筒体. 导致第二段筒体不 can 维持足够 temperature degree. usually, as in 第二段筒体 setting 180℃ temperature degree, is due to material hot amount loss 失, stability usually ultra- 135℃.

most simple solutions, is in material and 第二段筒体 method between, add 1～2 1 mm thick thermal insulation sheet/slice, and year more one-time thermal insulation sheet/slice, is thermal insulation sheet/slice has aging degradation and shrink toward.

large 家知道, water in ratio can more more tube/pipe hot 交换. high pressure in has high degree toward amount 交换, it 击破 边界层. 结果剧烈 流体运动引起 tube/pipe and between a large amount of hot 交换.

extrusion machine cooling ring system generally provide 20～60PSI pressure. is to 紊流, most good to 120PSI pressure. extrusion machine has cooling system parts (soft tube/pipe and 阀)都 need rise grade to 150PSI, can meet/satisfy 120PSI safety 系数. renovation formed rear processing cooling system can and 时排出 a large amount of hot.

侧喂 material usually used for filler di screw extrusion machine. many processing need very high filling amount filler, this filler also tool has very low density. most filling amount below/following factors made 约:

（1）侧喂 material 体积喂 material can force and extrusion machine screw 体积吃 material can force. 体积喂 material can force 取决于侧喂 material machine and screw screw 自由体积, and this screw speed.

if types material in testing in can to screw retardant force to material in, that this type of material material speed degree can to very good. if material machine 直接挨 主 screw 连接, that additives screw can 接受 材 material amount will to made. therefore, machine screw most good has long 螺距 螺纹元 parts, in material lower 游延伸2D～4D long degree. this will melt fast speed through material 口, make filler most large degree by screw 吃进. if machine screw design 引起任何侧喂 material 喂进材 material 堆积, that will heavy made filler material amount.

（2）允许 gas from extrusion machine 排出 排 gas can force . gas 目 就 is make gas easy 逸出, meanwhile also need filler from gas a large amount of 逸失. most good is in material upper 游开置 toward upper gas gas 口. has 时, in material machine upper 部开一 small semi 狭缝排 gas.

（3） also has its it factors need 考虑:

①喂 material machine material high degree

理想情况 lower, material screw need can can 近 安装于侧喂 material 口顶部, decrease small material high degree. if certain types 蓬松 材 material from gas in 流, that it can can 变 充满空 gas, from make it in lower rear false density large large decrease small.

②喂 material machine type type

need ensure filler material machine in device make filler 流态化. many device manufacturing design 特殊 搅拌 device used for filler material. material device 会连同 filler 一起引进空 gas extrusion machine. 一 顶部敞开 斜槽 material has 助于排 gas. false 如你 斜槽喂 material material has 一 实心 cover/cap belt/tape 一 圆 tube/pipe, and and material device is flexible 连接, that need design 一 排 gas 口.

③ material 斗斜槽 need anti-static

一 材 material due to scratch generate electrical 而引起 powder in material upper, from 而导致 powder 体饼状化. 一 简 easy solution/scheme is will material 斗斜槽接.

④ pressure shrink gas device

if material 饼持续存 in, need 一 特殊办 method. can use material 斗振动 device, is it 占空间, also need 安装. substitute/replace solution/scheme is 安装一 belt/tape gas nozzle device, in 斜槽 恰当位置 upper, in material long large front will its 吹破.

water cold extrusion machine machine 筒实际就 is hot device, has hot device 一样, water easy 于结垢而变 bad. many as attention/notes to, new extrusion machine cooling property can need ratio use 三, year extrusion machine good very more. machine has water in water inner surface, effect/influence hot efficiency. using/adopting concentrated degree acid liquid machine can 清理掉 water 垢, maintain machine good hot 效果.

gears is di screw extrusion machine 心脏. therefore need anti gears issues, use combined formed gears can more good gears.

combined formed gears 油忧点:

（1） more add slip 腻, relatively small scratch;

（2） gears, bearings and will more 持久;

（3） gears temperature degree more low, more 安静;

（4） combined formed 油不因 is machine 剪切而 loss degree;

（5） it in high temperature lower relatively high degree.

清 machine in remove extrusion machine and inner 残留 材 material, it consumption 时 拆 machine 清洗. machine material separation formed type: chemical agent and machine scratch agent. many agent meanwhile tool has chemical and scratch function. chemical agent and plastics 残渣发生 reaction make its machine surface.

machine scratch principle is from metal surface scratch and 冲刷掉残留材 material, use is scratch and methods. processing through more experiment/testing can to combined 适 清洗材 material and methods. has types 清洗材 material for has material has 清洗效果. processing need 廉价而 has 效 清洗材 material. ratio 如, in USA in many as use as is machine material, is it easy to for machine has good function.

lower introduction types relatively is has 效 清洗 agent:

（1）50%HDPE+50% silicon 藻土.

（2）HDPE+ water + 污 powder. will HDPE以 usually speed degree in melt temperature degree lower add screw. will powder use water in 桶里搅拌 formed liquid, from material slow slow add liquid. this liquid is foaming impact, scratch, screw.

搞 extrusion is machine long time. is in in, due to demand, 我们常常 need 不断切换, production 80kg product A, rear again production 200kg product B, and other and other.

（1） product amount need and machine large small versus for 应. this is 不言而喻, is many processing 者排产无 plan, use 75 machine production 500磅 mono 子, generate 300磅 waste material.

（2）写出 production product machine or machine 程序, this has 助于操 as plan time, remove about/regarding generate how much machine material 争论.

（3）帮助操 as 人员, 清洁 操 as tool in extrusion machine 周围, if frequency material, that in extrusion machine 周围搞一 工 as 台, need 东西都准备 good.

（4） research Raw Materials and formed product 流进流出操 as 现场 顺序. good make as 人员花费 relatively less force in 移动运输工 tool upper.

（5）清楚 lower product for machine 清洁程 degree requirements. false do you know lower product requirements 彻底 手工清 machine, that need time and material 糊弄清 machine.

（6） false can can, need according to decrease/reduce machine 顺序排产. this 就意味 need from shallow color to deep color. 反之, 你不 不进行 more machine.

Common as methods:

操 as 人员习惯早晨 to factory extrusion machine 开, 但却 忙 its it 事情. make extrusion machine add hot to amount 程闲置数 small 时. this will make polymer viscous to screw and machine upper, rear this polymer material will degradation and 炭化. machine method remove this material, more is machine production product, black spots will cycle property from screw and machine 筒里跑出, product, 引起客户抱怨.

positive 确 开 machine methods:

plan good what true positive need as extrusion machine, rear add hot, temperature degree to value, rear machine material.

positive 确 关 machine methods:

in machine front, most large degree in extrusion machine filling inert property polymer (如HDPE) machine 缝隙. HDPE赶走 oxygen gas, coating in metal surface, large reduce carbon oxidation material formed. in extrusion machine by “密封” rear, most good cold extrusion machine, is in gas in cold 18 small 时. cold, is has temperature degree setting is 零, full cooling water 阀. cooling water 泵, make cooling water through has 筒体部位, fast speed drop temperature. fast speed drop temperature will can polymer degradation and 炭化.