Shanghai Daoqin Plastics Co., Ltd.

         fluorine polymer 包括FEP, PFA, ETFE, PVDF due to its excellent corrosion resistant property, high temperature resistance, flame retardant property, chemical resistance, resistant scratch property, and electrical insulation property can, currently widely used in automotive, electronics, medical and other field/area, belongs to high application areas, fluorine polymer tube/pipe (包括 pipe/tube, rod 材) due to process process complex difficult control, material property strong/high, formed products quality and output/production volume difficult 以保障, 因而国 inner market upper fluorine polymer tube/pipe products main/primary is Imported, 50% above USA.

        实际 upper, selection good Raw Materials, selection positive 确 工装 equipment, fine adjustment good extrusion process, high speed degree extrusion high degree fluorine polymer tube/pipe full is can to.

        首先 is need selection good Raw Materials, according to experience and 客户 反馈, comparison good Raw Materials supply has DUPONT DuPont, SOLVAY Solvay, Japan Daikin and other.

         more important is, selection positive 确 工装材 material, selection made extrusion equipment screw and design, add upper most process control, is high speed extrusion fluorine polymer tube/pipe key points.

        本文 main/primary introduction fluorine polymer tube/pipe high speed precision extrusion for extrusion equipment and and process requirements:

        1, 工装 equipment material selection

         and other engineering plastics versus ratio, especially is high temperature nylon, high glass fiber (GF) engineering plastics versus ratio, fluorine polymer scratch abrasion loss high, however its property abrasion loss strong/high, this is fluorine polymer extrusion process difficulty/challenge, nitrogen or tool need 2 星期就会腐蚀掉, lower 图, main/primary is 点腐蚀 and 缝隙腐蚀 abrasion loss, scratch abrasion loss very less. especially is 工装接触面, screw, material tube/pipe, method 兰, 模头, and other 部位, 结果塑化效果差, machine pressure large, formed series quality issues, formed products surface bubbles, black spots, 晶点, 凹陷, 针眼, extrusion pressure decline, speed degree decline, dimensions ultra- 出, products color 泛黄, quality stability property large decline.

         selection positive 确 工装材 material improve/increase corrosion resistant property can is fluorine polymer extrusion key points, usually 宜选镍基 alloy 钢, outer usually 选INCONEL,MONEL and HASTELLOY, inner has new 三号钢. for/regarding alloy 钢 说, due to add different separation CR鉻, MO钼, SI silicon and other 元素, corrosion resistant property and strong/high degree is for 矛盾, corrosion resistant property improve/increase belt/tape strong/high degree decline, especially is strong/high degree and resistant strong/high degree large decline.

         therefore according to different fluorine polymer different strong/high degree, selection different alloy is extrusion production 线工装材 material design key/critical, certain Brand FEP material can 选INCONEL 718.. outer very more 客户愿意 selection price relatively high INCONEL alloy causes is, in corrosion resistant standards MR-01-75 standards in, INCONEL alloy is most high standards 7 grade.

        2, screw and design

        2.1 screw design

         fluorine polymer screw usually mono and other screw separation type screw design, increase large screw pressure shrink ratio can improve/increase melt strong/high degree, decrease/reduce products cracks.

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        2.2 mixing/compounding 头

         fluorine polymer mixing/compounding generally selection SAXTON design, lower 图, can through melt flow direction, has 效 熔 melt mixed combined, increase mixing/compounding and 均化效果.

         screw and material tube/pipe is extrusion machine extrusion production core, screw material tube/pipe quality 直接关系 to product degree, output/production volume, production stability property, selection most combined screw material tube/pipe is fluorine polymer tube/pipe high speed precision extrusion production key/critical. 米拉克龙 company in USA 自己拥 has 3 家 screw material tube/pipe 厂, has more year design processing screw material tube/pipe experience.

        2.3 模头

         remove 接触面材 material (more sheet/plate, separation device, 模芯, 模唇) need selection INCONEL以 outer, is improve/increase products degree, according to fluorine polymer features, based on material elastic property modulus 进行模头 runner design and pressure shrink ratio selection very important. 米拉克龙 company in USA has 自己 模头 company, is 客户定 made extrusion 模头.

         fluorine polymer tube/pipe precision extrusion requirements has runner retardant force adjustment function, using/adopting structure can decrease/reduce toward pressure for products dimensions formed effect/influence; another, 口模间隙 自动 adjustment can ensure stability thick 公差;自动浮动 芯 rod is degree ensure.

        如同 screw material 桶一样, high temperature resistance, wear resistant loss, resistant for 模头 材 material has very high requirements, another, precision extrusion mold hot deformation requirements relatively high, for material selection, processing degree, and structure design.

        3, process control

        一 strong/high large control system in fluorine polymer tube/pipe high speed precision extrusion in can less, is control, temperature degree pressure fast speed 采样反馈, more 层共挤 同步 control, production system data 通讯集 formed, is ensure products quality and output/production volume core.

        3.1 扭矩保护

         and other tool 钢不锈钢 screw versus ratio, INCONEL screw resistant strong/high degree relatively low, in cold and screw very easy 扭断, fluorine polymer tube/pipe extrusion machine screw machine price ratio/proportion very high, control system must tool 备扭矩 载保护 function. upper 图.

        3.2 screw speed

         fluorine polymer tube/pipe high speed extrusion 时, most screw speed 应该开 to negative 荷 90%, most large degree improve/increase production rate, screw design most large speed is 100RPM, production 应该开 to 90RPM above, this can ensure production degree separation to 60米 above. this need screw design ensure.

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        3.3 more 层共挤 同步 control

         fluorine polymer due to its excellent chemical resistance, flame retardant property, high temperature resistance, corrosion resistant property can, 经常应邀 and other plastics combined, 进行共挤, heavy 任, automotive upper tube/pipe, 包括2层ETFE 5层共挤, outer also has PA12 and other, due to different material features different, difficult degree very high, for extrusion machine and 模头提出 very high requirements, especially is control system, 自动化同步 control more extrusion machine upstream and downstream equipment achieve high speed high degree extrusion.

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        3.4伺服 electrical machine and electrical optimization device

         and other extrusion application different is, fluorine polymer extrusion usually using/adopting electrical machine 驱动, is frequency electrical machine or electrical machine, this can improve/increase 驱动精 degree and control time, most improve/increase product degree. another, 考虑国 inner power/electricity supply 实际情况, in production 线配置时, electrical optimization device (Line Reactor) is necessary selection.

MILACRON Extruder

         most rear need strong/high is, fluorine polymer tube/pipe high speed precision extrusion is comprehensive system engineering, remove extrusion machine and outer, true type cooling, in amount, 牵引切割都 is precision extrusion important step/link, outer and thick in amount formed from extrusion machine, 模头, true cooling ring control system, to most products quality and output/production volume, can has in amount, high degree 公差0.02mm is can can achieve. raw materials, equipment, process and other for most products quality and output/production volume formed effect/influence, production process/workflow in step/link need 精益求精, can ensure most product quality and output/production volume. 米拉克龙 company in fluorine polymer tube/pipe high speed precision extrusion has more year experience, 欢迎垂询.

本文由米拉克龙 extrusion sales 总监刘亚卫供稿