Shanghai Daoqin Plastics Co., Ltd.

1. 共 injection molding parts molding （芯层 injection molding parts molding ） using/adopting injection molding parts molding has 助于观察 to made parts in structure. plastics “甲”先 injection 充入部 separation type 腔, rear plastics: “乙”紧跟 “甲” injection type maintain 初始推动 flow pressure 场. according to table/sheet and dimensions large small, positive ratio/proportion 关系计 amount 出“甲” and “乙” use material amount, can made 1 inner is “甲” outer table/sheet full 由“乙”包裹 made parts. another, in product application 方面, has small separation table/sheet 皮“甲” material in “乙” material rear injection, make gate separation table/sheet can full combined. use 2 types different color resin 进行共 injection molding parts molding made parts, formed 一 容 easy separation table/sheet and 芯层区间（认识 to has injection molding parts molding parts in in has similar table/sheet and this non important. ） if has testing technology, usually difficult separation table/sheet 皮—芯层 区域 and its separation interface. injection molding parts molding non new process technology. UK ici company in 70 year 代就开始 application this technology, 并取 包括基础理论, production product and machine equipment and other patent. 现普遍 using/adopting ici production process similar “三明治模塑”, due to outer table/sheet 皮 材 material and in or 芯层 材 material different, therefore types material must has versus property, and 芯层材 material requirements tool has can high degree 辐射, foaming molding and 100% recycling utilizing and other property can. selection material multiple selection comparison 而定. injection molding parts molding process 问世15 year rear, true positive and 推广. types using/adopting injection molding parts molding thick made as 横截面. table/sheet material is non filling nylon, 而芯层材 material is 玻璃-珠 material - filling nylon. in 玻璃珠粒 material shrinkage rate low, tool has good dimensional stability. nylon table/sheet 皮赋予 gears 齿牙良 good lubricated property 并避免 珠粒 material easy generate abrasion issues. 基于共 injection molding parts molding 基础理论 currently already development types new type processing methods. 例如, inner “ upper 漆” and gas 体辅助模塑 molding expand large using/adopting this type of process scope/range. inner upper processing methods is using/adopting low molecular weight polymer as is outer material, gas 体辅助模塑 molding is using/adopting nitrogen gas or types gas as is 芯层（ or separation 芯层）材 material. product design and production processing equipment 不断完善改进, will meet/satisfy various new application and new technology demand, injection technology will formed is has force industrial large production process methods. 2. gas 体辅助 injection molding parts molding gas 体辅助 injection molding parts molding technology main/primary is is decrease light weight and （ or ）节省循 ring time and other 而逐渐 development 起. usually injection molding parts molding in, injection outer material, 并 部 separation filling type 腔. rear gas through nozzle injection or 直接进入 mold cavity inner, mold cavity made parts 芯层部位. liquid gas can injection to molding made parts 芯层部 separation. generally 而言, in inner gas pressure 推动熔 material toward front flow, 直至完 full type 腔, anti made parts table/sheet in solid stage/phase from mold cavity lower, versus table/sheet 皮层紧贴 mold cavity 壁, gas 体则保存 in made parts 芯层区间. due to gas pressure high large gas pressure, 故此该 gas pressure must in made parts ejection front reduce, 以避免当起限位 function mold cavity 壁移动时, formed made parts deformation. high degree pressure shrink gas difficult control its and gas 体芯 位置, process and 工序 不断改进, will can heavy production combined made parts. in machine control conditions lower, usually using/adopting process control. injection molding parts processing 基础理论 research in-depth, control methods lower control pressure methods using/adopting true positive process control, for material material 响应进监测, adjustment control. for injection speed rate and other processing parameters 改进, for molding made parts especially is for its machine features and surface features will generate significantly effect/influence. material speed degree and material injection speed degree versus and other, understanding this very key/critical. viscous elastic property material and can process versus 互关联, but also is 同步进行. 总之, 想直接观察 to material 响应既不 can can very 不现实. 由此而 generate can heavy property 次序处理 or control material equipment. 该工序 process/workflow in key/critical steps is using/adopting dry ring amount machine equipment. has heavy property pressure 工序当然 important, most excellent 先考虑 tool has heavy property melt features. 由此, usually requirements in control device upper add 设辅助探测 device, 以保存记录 plastics melt pressure and temperature degree, is has melt important parameters, 但并不足够以 adjustment material non 线形响应. property adjustment control equipment positive development used for molding high degree complex injection molding parts made parts. 例如, machine 械式 阀控 gate used for hot runner system in, in runner inner can more good separation pressure, can remove 熔接痕 and decrease/reduce warpage. 3. low pressure injection molding parts molding low pressure injection molding parts molding already 经出现 in most has processing process in. its this 也并不 is types new process, using/adopting processing methods, can make equipment can more good and material in melt versus 匹配. molding conditions lower, injection 初始时 melt degree pressure generate large unstable 效应. 由此引起 viscosity increase high, meanwhile melt due to to pressure shrink 而储存 elastic property can amount. low pressure injection molding parts molding process and versus 反, melt nozzle and runner. due to melt viscosity pressure increase increase large, low pressure injection molding parts molding melt viscosity relatively low, from can more good control melt viscous features. another, material inner melt pressure increase large speed degree fast, will more 呈现出 similar solid 态 空体响应. viscous elastic property plastics melt from pure liquid to pure solid process in, tool has wide frequency features. melt or time and other specific features is polymer upper chemical formed separation 决定. flow conditions 突然改变 or large degree 变动, more has 利于形 formed similar liquid features. upper, low pressure injection molding parts molding is control or adjustment plastics viscous elastic features types processing methods. resin production injection molding parts processing generally high flow property resin molecular weight reduce, reduce its viscous elastic property, from combined production thin products and other need. for processing ring 境认识 in-depth, using/adopting low pressure injection molding parts molding will make plastics melt more can production ring requirements. currently has industrial product is using/adopting low pressure injection molding parts molding methods. large more design project already heavy will low pressure injection and again injection plastics molding combined use. automotive inner sheet/plate molding, is will textile material or non textile material 放置入 injection molding parts mold inner, again toward injection molding parts mold injection material. inner add label methods is ultra- 越 simple printing types molding methods. in 每次循 ring production 开始时, mono label or film can in inner 转换位置. film remove can printing outer, 不定期 tool has very more can, （如 high resistant 行击, tough property resin ） or film can has additives and stabilizer, 以保护 molding made parts surface. 4. injection molding parts molding versus comparison 而言, injection is comparison new injection molding parts molding selection parameters. this technology most large difficulty/challenge in processing conditions 突然改变时, for plastics melt will 呈现出 how to 变化行 is 知之甚 less. has melt 流变学 基础 Knowledge, not only is solid 定 剪切 viscosity. 确切 说, melt 响应（ viscous property and elastic property is ） need table/sheet features, not only is usually flow speed rate or speed rate and temperature degree, 也包括 pressure and flow speed rate. this features very more inner but also separation difficult 于弄清楚. however, if in type injection 方面取 实质 property 进展, will made multiple different plastics specific as 规程. also increase general purpose method, to formed and control methods. in injection molding parts molding in, type solid 定不变, certain lower, also has utilizing in and holding pressure 陷段移动模壁. can using/adopting 2 types different methods: type direction 垂直于 separation 模线; or sliding type 腔壁. in stage/phase type increase for made parts especially is table/sheet separation separation 子 变轴 orientation. through this type of processing process, made parts bending property can and its it mechanical properties to large improve/increase. poly 苯乙饮 water and polypropylene (PP) injection device is using/adopting this type of processing methods obtain heavy large breakthrough 2 product. 5. injection — pressure shrink molding injection — pressure shrink molding in type 腔壁移动 direction 垂直于 separation 模线. using/adopting this type of methods molding 时, in stage/phase, 按工序 generate pressure melt flow, this runner deep degree is can 变化. in relatively deep runner in, pressure decline relatively low, make large made parts molding in melt has degree pressure, 并避免 瞬间 材 material 响应, this 2 types factors 同样会 retardant melt flow. injection molding parts molding process in, type deep degree can can is most made parts thick degree 14%, in plastics filling large 致60%—75% type rear, injection, mold cavity 壁周围 meanwhile to pressure, most made parts molding is 止. made parts most dimensions in this stage/phase 确定. if in 模壁按工序移动之 front type 腔, types process usually is pressure molding. large upper, pressure molding is in can 变体积 type inner using/adopting pressure for made parts holding pressure. pressure stage/phase is increase density stage/phase, density in melt and solid plastics between 起变化. using/adopting pressure methods molding 致密圆盘, can 残留应 force decrease most low degree, made parts upper 残留应 force can generate 变折射 phenomenon. pressure molding type active type is types new technology, its injection full made parts solid stage/phase through more metal type 腔壁以“ holding pressure ” made parts. this type of methods already has is external gas 体辅助 molding method, its this is types understanding, is gas 体并没 has effect/influence plastics melt in type inner flow. in injection molding parts molding in, holding pressure is in maintain type 腔体积不变 meanwhile, in pressure function lower, add more more plastics. in type inner holding pressure formed non-uniform pressure distribution, has can can in high pressure gate generate made parts defect. 6. injection molding parts mold cooling injection molding parts mold cooling is key/critical process technology. large separation molding cycle is thermally conductive amount process. can amount can from hot melt 传递至 cold injection molding parts mold upper is due to in temperature 差 至. injection molding parts mold plastics table/sheet has 效 隔离 芯层, from make this type of hot methods non low 效. can is, injection molding parts mold cooling usually to design most rear stage/phase 才 以 attention/notes. relatively good cooling design can shrink short 20%—30% or more short ring production time, improve/increase production rate. in production ring cycle in, injection molding parts mold surface temperature degree 不断 “ high — low ” cycle property 变化, hot melt pressure 模壁时, mold temperature high, ejection made parts rear, lower injection front, mold cavity mold temperature low. is will cooling time shrink short most low degree, 人们一直 in can production combined made parts most low injection molding parts mold temperature degree. mold temperature important function is effect/influence type inner melt flow and table/sheet and between dimensions ratio/proportion large small. mold temperature low, table/sheet dimensions thick type inner pressure decline large. cooling technology is in injection plastics mold cavity rear, usually using/adopting ring cooling tube/pipe inner non cold liquid adjustment cooling technology. made parts ejection rear, if has ring, lower one-time material 熔流进入 mold cavity rear, mold cavity temperature degree significantly upper rise. using/adopting cooling methods rear, its type temperature degree will more high, ratio injection molding parts mold cooling methods temperature degree low. cooling can widely used in thin made parts molding; requirements heavy 复精确 surface made parts molding, and runner deep degree scope/range material 突变行 is. 例如逆滞 flow. for/regarding cooling processing advantages and its it related features in in advantages 说, has 关脉行 cooling cost is high already 显 不 that important. 7. molding process molding method is types comparison new process methods, processing internal has complex 渠道, or made parts. production pipeline tool, outer housing/shell and 体育运动商 product and other small type made parts production injection molding parts processing 商们, in 15 year front 就开始考虑鉴定 is using/adopting this process. most 近, automotive manufacturing company already using/adopting process production large type parts, light 质 动 force system parts and gas tube/pipe and other. this type and injection molding parts mold tool has can will type function, has inner 腔壁 嵌 parts type 芯. main/primary difference in type structure, this type of type can in inner 拆卸也不 can use machine methods to outer. another, this type of type 芯若不 is electrical add hot melt 掉, low melting point （138oc） 锡-铋 alloy or another alloy, is in 二次操 as in by （ can solvent property acrylic type polymer ）行洗掉. this type of molding using/adopting process methods, main/primary difference in type thermal properties and type material different. type thermal properties effect/influence made parts upper flow table/sheet 皮-芯层 structure thick degree. according to processing conditions, and table/sheet thick degree can large same, in certain types lower, can can generate warpage defect, 而另一 types lower, has can can decrease/reduce or anti easy defect made parts warpage phenomenon. molding method in, type 芯仅仅 as is 模壁. process solid parts 而改变. due to metal alloy type or polymer type thermal properties large 不一样, its requirements pressure has different. polymer type to 隔绝壁 function, and in molding made parts in generate non thin table/sheet 皮; metal type formed is dispersion hot in made parts upper formed versus for thick table/sheet 皮. if plastics melt 流 时 type surface already 熔化, will generate flow property 变化. already has using/adopting strip/profile as is type 芯. liquid film in and plastics interface in non complex processing issues solution front, this type of methods used for high degree made parts is can 行. 8. machine molding using/adopting machine engineering （cae） for processing design and analysis has shrink short design cycle can 避免代价昂贵 machine 械失误. property true 代码常 used for runner upper dimensions, balanced material in runner system and type inner flow, meanwhile gate most 佳开设置 and gate 数目. injection pressure and clamping need according to different processing conditions and material 而定. shrinkage rate and warpage rate combined 初始流 toward can 准确估算出. important is need make this type of design tool 帮助熟练 analysis in certain design solution/scheme or processing research 时进行判断 操 as. 结果必 must understanding is research for and processing /材 material is front 提. 当考虑 using/adopting this type of methods 准确输入 data rear, can 取 巨 large 效益. another, this type of analysis property can make design cycle more short and production time more short. 应该提醒 attention/notes is, property cae程序 usually is can use. 充模仿 true can generate has value 见识, 但结果必 must heavy new for its property heavy new 考虑估计. application 现代计算 machine injection molding parts molding experiment/testing, 仅限于 pure viscous property 流体（不包括 viscous elastic property melt plastics ）. can forecast melt type 腔 实际 flow speed rate formed structure and property can and other, can high degree viscous elastic property analysis. currently using/adopting its it processing methods can can to this type of water 平, and most year, true equipment industrial belt/tape and large research small already 取 良 good 进展. has company positive in force 探索仿 true technology, can positive understanding more more 现实 塑 property is and processing phenomenon. 例如, polymer orientation for local physical properties and property can distribution effect/influence. processing material is non complex, certain viscous elastomer phenomenon still has full 弄清楚, more combined processing methods currently positive slow formed. this more strong/high has force methods will obtain large large ultra- currently design production can force.