Shanghai Daoqin Plastics Co., Ltd.

and metal 燃油箱 comparison, plastics tool has multiple advantages, quality light, 形状自由 degree large, made cycle short, use low, automotive design manufacturing and type, safety can property high, resistant impact, corrosion resistant, 不爆炸 and other. due to chemical separation structure and HDPE similar, according to versus versus principle, its has formed wet lubricating HDPE油箱 surface, expand dispersion to container internal 并渗透 to outer gas loss 失掉, this is HDPE燃油箱 disadvantages. automotive industrial technology development, environmental protection and safety requirements improve/increase, for plastics 燃油箱 retardant property can requirements 越 越 high, high retardant property already formed is automotive plastics 燃油箱 development trend. improve/increase automotive plastics 燃油箱 retardant property main/primary has types methods: fluorine 化处理, 层状掺 mixed and more 层共挤. due to fluorine 化处理 in fluorine gas need recycling 处理, has series environmental protection issues. 层状掺 mixed technology in production as 时, for extrusion machine screw mixing/compounding property can need degree, non difficult 以 握; and 层状掺 mixed plastics 燃油箱 mechanical properties low, retardant property versus for relatively but also stability. comparison lower, use more 层共挤 methods production tool has retardant property automotive plastics 燃油箱 formed is selection. from inner year new use automotive plastics 燃油箱 molding equipment 看, more 层共挤 in machine large more can this 一点. more 层共挤 in machine system formed used for automotive more plastics 燃油箱 molding more 层共挤 in machine and used for mono plastics 燃油箱 molding material in machine different is extrusion system and machine 头. more 层共挤 in machine machine and type 坯 典 type structure 如图1 示, its type has 六层. from outer separation is welding 层, recycling material 层, adhesion 层, retardant 隔层, adhesion 层, inner 层. large type in machine from to in, its basic formed more large 变化, generally 包括: extrusion machine, machine 头, clamping plant/unit, plant/unit, products plant/unit, liquid pressure 站, electrical system. generally outer equipment also 包括: mixed material system, material powder recycling system and other. large type in machine its extrusion type methods can separation is material and extrusion 式, type structure also can separation is mono or more 层. currently, inner 200 di L full industrial large more using/adopting mono material in machine made. market for automotive 燃油箱 retardant property can requirements 越 越 high, mono plastics 燃油箱 will by 淘汰, 取而代之 is more plastics 燃油箱. versus 应, more in machine in plastics blow molding automotive 燃油箱 molding equipment 占 份额 day expand large. more 层共挤 in machine and type 坯 典 type structure extrusion system more plastics 燃油箱 in machine generally has extrusion machine, separation 别塑化 extrusion 每一层. its in inner 层, welding is material, and mono 层燃油箱 use raw materials same. retardant is EVOH or PA6/66. commonly used grade: EVOH is EVAL F101A, Soarnol DT2903（Nippon Gohsei）; PA6/66 is Ultramid C35（BASF）, Durethan C38（Bayer）; adhesion is maleic anhydride grafted modified LDPE or HDPE, commonly used grade is Admer GT-5A（Mitsui）, Bynel4006（Du Pont） and other; recycling material use is type material and waste products powder material, above formed 份. 图2 JEW company extrusion machine screw design mixing/compounding parts more plastics 燃油箱 in thick degree ratio/proportion extrusion system control. extrusion machine stability extrusion property can is achieve this target/goal 基础, therefore inner 层, welding 层, recycling material 层, adhesion 层都必 must using/adopting IKV structure extrusion machine, heavy add material system 也广泛 using/adopting. easy by overlook is recycling material powder 碎状态. if powder non-uniform, extrusion pressure 会波动 very large, effect/influence to ratio/proportion 关系. therefore, recycling material by mono pelletizing again add use. recycling material in has multiple raw materials formed 份, extrusion machine need has very good mixing/compounding can force, make EVOH or PA6/66 in HDPE in small 于0.02mm micro 粒状态 uniform distribution. multiple mixing/compounding device therefore by use. mixing/compounding device, new type tensile mixing/compounding device and other by in extrusion machine and machine between. JEW company in extrusion machine screw design 如图2 示 mixing/compounding parts. machine 头 连续 extrusion more 层共挤 machine 头, its runner uniform extrusion 显 尤 is important. runner design more using/adopting type runner design. runner advantages is is mono also is more 层, in direction 均不会出现 obvious combined 缝区. its main/primary issues is 随 层数 increase more, for in machine 而言, due to upper made, runner design 会变 异常困 difficult, therefore, in relatively more 层数 情况 lower, using/adopting 心形包络 runner design, 但各层熔 combined 缝区需错开 distribution. technology development, machine runner design, achieve machine true 模拟. large type, used for design 2D, 3D, CAE soft parts already 经出现. group development 六层共挤 large type machine and 1000L储 material machine in, 就引进 Futuresoft company large type machine design analysis soft parts FLOW2000, soft parts from 2D flow, 3D flow, runner, 心形包络 runner, flow and other multiple analysis, can 模拟显示 melt in runner inner flow 时各处 temperature degree distribution, pressure distribution, force distribution, rate distribution, time, can for runner design 进行指导, most solution/scheme. using/adopting large type analysis soft parts, solution many method analysis 计算, make machine design in can 靠 理论基础之 upper, improve/increase large type machine design quality, decrease/reduce design 风险. 应该说, type large type soft parts 出现, is machine 头, design manufacturing field/area inner most important technology 进展. type thick control in machine machine type thick control is key/critical technology. type thick control separation is toward control （AWDS） and toward control （PWDS）两 types 形式. currently large type in machine upper generally tool has toward type control function, its control from 24点 to 256点 different, toward thick control function is make material according to products different ratio toward obtain different thick degree, from basic ensure most products has comparison uniform thick distribution, it is through 芯模预设 位置 as toward 运动而改变模头 开口 amount to 改变坯 thick 目. toward thick control can improvement products thick distribution, due to its type in water 平截面 inner still and other thick 圆形, for separation in certain for direction has relatively large tensile requirements products still is most 佳, therefore generate toward thick control technology. toward control technology can make extrusion type in certain requirements inner non 圆截面 变化（ generally is or 菱圆）. toward thick control and toward thick control combined function, can obtain most type 坯, can obtain more is products thick distribution. toward thick control technology development to 今天, basic upper formed types type design, types by is property ring 式, types is 口缘修形式. property ring is through electrical liquid control thin property ring in or for direction upper deformation extrusion type thick degree. it features is 无论吹 made what products, need its 口模直径不变, toward control can function. structure in main/primary issues is property ring fatigue lifespan has 限, easy loss bad, more made as new property ring parts price 昂贵. 口缘修形式改变 type thick is 靠修形口 ring upper lower achieve. and property ring structure versus ratio, it most large advantages is use lifespan long, but also need more 换, has basic machine processing can force 工 injection molding parts processing can 承担. in has design in, ring 修缘部 separation formed active block 嵌入式, more 换, decrease/reduce more cost. UK company has this technology patent 权. toward thick control technology for/regarding improve/increase large type in products quality is has methods, meanwhile it also can in ensure quality meanwhile, decrease light products quality. is add sleeve/set large type toward thick control plant/unit add use is relatively high, 以SIG company is 例, sleeve/set belt/tape 两 伺服油缸 Φ220mm直径挠 property ring toward control device, its is 20余万 Germany 马克. high 昂 费 use, made use 户广泛 selection toward thick control device, especially is large type in machine use 户. for/regarding 1000L above in machine, due to manufacturing upper difficult, equipment manufacturing injection molding parts processing generally provide toward thick control plant/unit equipment 选项. as is types substitute/replace, many use is 弥补缺 less toward control plant/unit 不足, 采取一 types simple is has methods, 即芯模修形 method. its specific as method is in tool has toward thick control function machine upper, for its 芯模 特定位置进行修形, from in toward control meanwhile, obtain in toward upper thick non 圆变化 amount. 当然, this type of need has experience, specific analysis products 情况, from 而确定修形 位置, 方位, amount and 修形 形状, generally 修形时 need attention/notes for 称. large type in machine also can used for multiple product production, outer in 空桌椅, can use in turnover box, high speed in 间隔离 sheet/plate and other. automotive upper parts can using/adopting in blow molding methods made as, base/seat 椅, tube/pipe, sheet/plate, plastics 燃油箱 add tube/pipe and other. above products using/adopting material in mechanism as. if for 燃油箱 retardant property has requirements, plastics 燃油箱 add tube/pipe using/adopting more 层共挤 in machine molding.