Shanghai Daoqin Plastics Co., Ltd.

injection molding parts molding has A grade surface light degree and add strong/high or products by is is injection molding parts molding processing injection molding parts processing 商 一 similar 幻想式 target/goal, tube/pipe is in usually injection molding parts molding and internal gas 体辅助 injection molding parts molding technology 方面做出 most large force. for/regarding more industrial products, also in improve/increase for/regarding has add strong/high or products surface milli shrink 痕凹陷 molding requirements. in thin application 方面, machine, automotive 车体侧边 molding parts, inner decoration sheet/plate and machine device and other products, for this requirements is especially key/critical property. remove thin products outer, supply 商说, external gas injection molding parts molding (EGM) in large type, sheet/plate products, cover/cap sheet/plate, machine housing/shell, table/sheet sheet/plate and and other parts molding has large force. 　　 from 1990 year 代早期开始就 has types can selection processing technology used for remedy injection molding parts molding surface material defect. types method is in injection molding parts mold by to large 约98%-99% rear, gas to products outer surface. gas from type 芯一侧进入 injection molding parts mold, toward versus for injection molding parts mold surface pressure, make key/critical requirements appearance surface injection molding parts mold 壁. types method is gas pressure method. in pressure method in, types gas 体, usually is gas, in melt injection front for injection molding parts mold increase pressure, ensure in type 腔充模 front add pressure, make melt pressure toward injection molding parts mold surface. types method function is in melt cooling ensure material combined to injection molding parts mold surface. “ it effect/influence material methods similar pressure shrink molding, ”巴顿菲尔(Battenfeld) company processing engineering and development 经理Juergen Ehritt说. 　　三 types external gas injection molding parts molding technology positive by USA company application 推广, it is USA 巴顿菲尔 company Airmold Contour process; Japan Asahi Kasei company development, Incoe company and CGI gas injection molding parts company obtain can external gas molding technology; and 由Textron automotive company through it IntelliMold system provide gas pressure process, 也即IntelliMold process. 　　 although external gas injection molding parts molding technology using/adopting very slow, supply 商宣称说∶ molding injection molding parts processing 商 兴趣 positive in growth — 因 is 客户保密 causes, this type of growth can can add 以证实. “我们 currently tool has 数以十计 has utilizing and property application, is full is patent has, ”Incoe company business development vice president John Blundy说. 　　Textron automotive company 称, it in 自己 密歇根州Troy Trim部门 has 三 商业 application using/adopting gas pressure technology. in is IntelliMold process 运转配备 24台 molding machine, it in large more ultra- 1000t, plan in year year most less has 100 system to company machine equipment upper, manufacturing 部门执行 vice president Jerry Mosingo说. in Textron automotive company year 买 该项 technology front, processing process several can already by other company, also has it development 商, 密歇根州Ann Arbor M & C processing process company. 　　CGI company and 董事Terry Pearson说, external gas 体辅助 process in Europe and has many application, and less has 一家北美 molding processing injection molding parts processing positive in is automotive application 而关注 it. CGI company is in month 间由两家 UK company — Cinpres, internal gas 体辅助 technology supply and Gas Injection company, Asahi company external gas process relatively 早期 推动者 — combined 并建立. Pearson说, Asahi Kasei company from 1990 year in 期开始发出 30 许 can 证. “几 types application positive in used for automotive parts development, that use other methods can can remove shrink 痕凹陷, ”Pearson说. 　　巴顿菲尔 company Ehritt说, it external gas processing process by 商业应 used for 北美, is detailed fine is belongs to 客户. 　　 breakthrough 　　部 parts type internal structure thick external parts thick 时, structure separation cooling relatively slow. in cooling upper this 一差异 in products inner formed internal stress, can can in products surface performance is shrink 痕, 斑点, pressure 陷, light and warpage. “当 structure separation (add strong/high or 者凸台) cooling 时, due to positive 常 体积 shrinkage, it 拉动周围 材 material, products surface material, ”Incoe company Blundy understanding 释说. 　　 internal gas 体辅助 injection molding parts molding used for solution issues, method is made formed relatively thick add strong/high 筋, rear use gas separation 充入以挤空 add strong/high 筋. this methods disadvantages can can relatively high material use amount, relatively high pressure and relatively long cooling time, this also can ensure 不出现凹陷. 　　 this 考虑打开 external gas injection molding parts molding 之门. remove solution surface quality issues, from can remove rear stage/phase coating as outer, external gas injection molding parts molding technology also can generate multiple processing benefits. its is shrink short or 者无需 cycle in holding pressure or 者锁模 stage/phase. “ holding pressure stage/phase less need 50% clamping force 吨数, ”巴顿菲尔 company Ehritt说. holding pressure gas pressure achieve, therefore for clamping force requirements can reduce 30% above. relatively low clamping force can can 意味 延 long injection molding parts mold lifespan, Pearson补充说. 　　 external gas injection molding parts molding is types low pressure molding methods, in thin molding most high requirements 13.79 Mpa(2000 lbf/in2) pressure remove 凹陷. types internal gas injection molding parts molding technology can can need to gas pressure, large is 6.89 to 25.51 Mpa(1000 to 3700 lbf/in2), usually injection molding parts molding need more high pressure, large is 30.34 to 68.95 Mpa(4400 to 10000 lbf/in2), but also also 未必一定 can solution issues, Pearson说. 　　 external gas can will products from type upper launch, decrease/reduce or remove 顶杆痕迹. it can molding products relatively thin, from reduce material use amount. relatively low clamping pressure and remove degree phenomenon, has production internal stress products. relatively thin thick and and injection molding parts mold improvement can belt/tape relatively fast cooling and shrink short cycle time benefits. 　　“ using/adopting external gas system to and molding processing injection molding parts processing use relatively low cost, relatively large shrinkage material, 例如PP machine 会, ”CGI company Pearson说. 　　 other methods property 　　 external gas molding technology supply 商熟知 internal gas 体辅助 molding methods. Incoe company is formed gas 体辅助 injection as injection molding parts mold parts, and 巴顿菲尔 company and CGI company toward market supply internal and external gas types process methods. therefore, it for internal gas 体辅助 injection technology property method can is is belt/tape 偏见.　　“ using/adopting internal gas injection molding parts molding, gas retardant force most small 通道, issues 也恰恰出 in that 里, ”Incoe company Blundy说. “ if in 一 区段, injection molding parts mold relatively hot or relatively cold, can can gas 体通道 expand or separation to relatively small in, formed types 指形效应. ”指形效应并 non can bad surface quality gas 体辅助 phenomenon, CGI company Pearson补充说. gas 体流流 products 时, flow 状态 任何犹豫 phenomenon can can in surface upper formed can 见 线 strip/profile, this similar in melt 充模时犹豫会形 formed 斑纹一样. internal gas 体辅助 molding can in products upper gas injection upper lower “影”迹, that gas pressure most high. gas pressure from gas 体注入口进一步 decline remove 时, can can formed or 者熔接缝. internal gas 体辅助 molding need gas and gas 孔, in products upper lower 斑点. (Hettinga equipment company internal gas 体辅助 molding system in molding rear will gas 体保留 in products in.) 　　Pearson补充说, let internal gas 体流入一 add strong/high is 一项挑战. “ if has many 　　平行 add strong/high 筋, upper can can make gas uniform to 每一根 add strong/high 筋. ” has different type formed sleeve/set injection molding parts mold can table/sheet internal gas 体辅助 molding gas 体渗透 is 否令人满意 issues. 　　 internal gas 体辅助 injection molding parts molding also need provide gas nozzle and gas plant/unit, and gas substitute/replace melt 排出溢出阀. this project in external gas technology in or is 取消, or is engineering heavy new combined injection molding parts mold in. 　　 external gas injection molding parts molding processing process excellent usually injection molding parts molding. “ usually injection molding parts molding use high pressure holding pressure and solution issues. is shrinkage, generally injection molding parts molding injection molding parts processing in type in injection relatively more material 以进行 holding pressure, is, that in products inner formed internal stress, but also can full solution issues, ”Pearson说. in certain lower, injection molding parts processing is anti 止凹陷而设置 holding pressure and time, is add long cycle time. 　　 is external gas injection molding parts molding advantages, Incoe company molding 一 645.16 cm2(100 in2) ABS/PC alloy device cover/cap 子, use usually processing methods, using/adopting or using/adopting holding pressure, and use it external gas injection molding parts molding (EGM) processing methods. in has lower, cycle time is same. Blundy说, use holding pressure method made formed products weight is 246.5 g, need 41 t clamping force, and still has 凹陷. has holding pressure stage/phase methods production products heavy 261.5g, need 125t clamping force, still has 凹陷. EGM parts heavy 246.5g, 仅需41t pressure, and has 凹陷. 　　没 has can 包治百病 灵丹妙药 　　 external gas injection molding parts molding technology is combined has injection molding parts molding injection molding parts processing 商 灵丹妙药, supply 商告诫说. Pearson说, “ has many injection molding parts molding as for products inner has 一定程 degree force is can 接受, and for products has negative effect/influence. ” 　　源自CGI company, Incoe company and 巴顿菲尔 company 消息也警告说, external gas molding 仅仅限于 need in products surface tool has high quality light degree products. “ therefore transparent products molding injection molding parts processing 商不会希望 using/adopting this processing methods, ”巴顿菲尔 company Ehritt告诫说. 　　但 is, Textron company Technical Service 经理Anthony Spalding说, it company positive in make it processing methods most 佳化以 decrease small this 一效应. company use transparent ABS material manufacturing block 无斑点 sample sheet/plate. 　　 certain supply 商也说 high pure degree (至 less 98%) nitrogen gas is it processing methods use most gas 体. in pressure gas in oxygen content relatively high 时, can can formed certain plastics melt oxidation. use nitrogen gas increase equipment and / or as cost. is, Textron company 发言人说, in use pressure shrink gas IntelliMold反 pressure method technology upper has to issues. also has, Incoe company most use 清洁, drying workshop pressure shrink gas experiment/testing it external gas injection molding parts molding process methods, for it 们 初始结果感 to 鼓舞, Blundy report 说. 　　 supply 商指出, raw materials and cycle time will separation is using/adopting this processing methods 需 许 can use, injection molding parts mold and add equipment cost. also has, certain 消息源承认, using/adopting external gas molding technology 时, cycle time decrease/reduce can can is micro small. is has utilizing, in type 腔充模 and gas 体引入 between usually has time 延迟. “你必 must to material time, let material good, make gas has can pressure, ”Blundy说. gas 体进入, holding pressure and injection molding parts mold time and usually injection molding parts molding holding pressure and time large same. 　　 molding injection molding parts mold 改进　　　　 external gas injection molding parts molding usually need in injection molding parts mold inner or in provide gas pipeline inner pressure device, and gas 体发生 device and control technology. gas injection speed degree is important, pressure is important. injection molding parts mold need increase 5% to 20% made cost. molding injection molding parts mold most key/critical is injection molding parts mold need 紧紧 密封, in injection molding parts molding maintain uniform gas pressure. key/critical is separation type 线, 顶杆销, type and gas 孔. in belt/tape has can type or other parts injection molding parts mold in, supply 商建议 in injection molding parts mold external parts upper add 一 密封 block. silicon is most usually use 密封材 material. 　　 products design for has gas 体密封做出贡献. “靠近 separation type products parameters must as 改变以建立密封, ”Incoe company Blundy说. has this 样 情况, products upper strip/profile add strong/high or 者凸台就自然 密封 gas 体, gas in add strong/high between local 区域起 function. 　　排出 gas need in injection molding parts mold upper as certain 改变. Textron company in usually injection molding parts mold inner use machine methods processing mono 独 通道连接现 has gas 孔, 通道起 to gas tube/pipe function. other system, 如Incoe company external gas injection molding parts molding, it is in injection molding parts mold inner metal more parts, let gas 体进出. “当 gas supply in 断时, gas through parts, retardant force most small 通道反 toward 流回, ”Blundy说. another, can can need 特殊 阀门 technology anti gas through hot runner nozzle 逃逸. 　　三 types external gas molding methods 　　巴顿菲尔 company Airmold Contour processing methods is company internal gas 体辅助 molding technology Airmold types 延伸. methods use types can 移动 供 gas equipment, belt/tape has 图像接触屏 control plant/unit. “我们不 control products gas 体体积, control pressure, ”Ehritt说. ring gas pressure control system 依靠一 time or melt pressure 触发信号引进并维持 type in gas pressure. gas through design formed and type inner surface versus nozzle or gas gas. 　　此 molding machine in Solvay engineering polymer company 实验室里, molding machine specifications is 500 t and 4000 t. this molding machine can is 巴顿菲尔 company toward 客户演示 use, can use 取决于 specific application. 　　CGI company has Asahi company has external gas injection molding parts molding technology can 证. 第一项 similar 于由Incoe company in 北美 区 provide technology. 第二项包括 external gas injection and add holding pressure function. “甚至 for/regarding external gas injection molding parts molding technology, has can can generate certain shrinkage. holding pressure has shrinkage 进一步 decrease/reduce, ”Pearson说. 他拒绝说明 in what lower CGI company recommendation certain types methods recommendation types methods, or is detailed 说明两 types processing methods difference. according to Pearson method, 由任何一 types processing methods made formed products difficult 以彼此 add difference. 　　CGI company types nitrogen gas injection system, can in 10.14 Mpa(1470 lbf/in2) pressure lower provide gas 体, 由安装 in injection molding parts mold and machine upper device control. 　　CGI company it processing methods use can decrease small products thick more 达50%, shrink short cycle time 达40%, injection molding parts mold pressure less can reduce 25%. 　　此 processing methods can injection molding parts mold or molding machine 发放许 can 证. use from 5000 to 20000美元不 and other, 取决于 需 injection molding parts mold or machine equipment dimensions large small. patent use use is one-time property, for injection molding parts mold has 效. CGI company provide is external gas injection molding parts molding 而进行 injection molding parts mold renovation 服务. 　　Incoe company EGM processing methods add high 达10.34 Mpa(1500 lbf/in2) nitrogen gas through injection molding parts mold type to type inner melt plastics. gas through block more metal parts, gas or has small 珠进入. gas control device need 一 自 molding machine 信号, in process or 接近结束时释放 gas 体. can according to time or screw generate. 　　如 need use EGM technology, Incoe company products 总体规划 field/area, for sleeve/set injection molding parts mold one-time property use 5000 to 15000美元. Incoe company is its gas control use control equipment 收取附 add 7500 to 9000美元, rear, molding injection molding parts processing can use other gas control device. Incoe company can in it 实验室 in 125 t and 425 t molding machine upper it EGM technology. 　　 gas pressure 　　Textron company IntelliMold external gas molding process and other methods different. 首先, in melt front, it use gas 预先充满 injection molding parts mold type 腔. 第二, type 腔充模时, it 连续测 amount control internal melt pressure, is make products density uniform. in this technology rear concept is, in usually injection molding parts molding in melt rigid 一进入 injection molding parts mold to low pressure, rear in 充模结束时 also is very high pressure. Textron company 称, 当试图 using/adopting high holding pressure for shrink 痕凹陷时, this phenomenon especially obvious. in 第一批 and most rear solid 化 材 material density between 差异本身就 is formed shrink 痕凹陷, force and warpage 之源. 　　“我们 to injection molding parts mold add 1.38Mpa(200 lbf/in2) workshop gas, it has control material 流锋并 make products from 充模开始 to 结束都 density uniform, ”Textron company Spalding understanding 释道. “反 pressure in 我们充模时包住 products, therefore 我们不 need for injection molding parts mold as degree 充模处理 or pressure shrink material. ”　　 pressure shrink gas as is force will material uniform toward type 腔壁. “ this to relatively good dimensional stability, decrease/reduce warpage, 凹陷, combined and shrinkage, ”Spalding说. 　　 another, gas pressure maintain products appearance and type surface time relatively long, anti products appearance is shrinkage 而脱离 type surface. this 样, is is holding pressure and time, can decrease/reduce cycle time to 25%, Textron company 称. 　　IntelliMold system use pressure device, 一 设 in nozzle inner, another in type inner, in 接近充模 most 远点. melt injection molding parts mold 时, by pressure shrink gas by pressure 回, from it 进入 排 gas 口排出. type in device 开始感受 gas pressure, type 腔几乎充满时, melt pressure. control device 每2 ms from 两 传感 device one-time pressure data, use has method processing this data, make type inner melt pressure to value. control device adjustment injection speed degree type inner melt pressure setting value. setting through experiment/testing or according to use processing methods experience selection. 　　设置IntelliMold processing methods use usually injection speed degree or pressure 变化曲线. has speed degree 曲线, pressure essence upper is 平坦. this type of methods by formed is make processing process for liquid viscosity, injection molding parts mold and its temperature degree, and material viscosity “ transparent ”, or 者不受 effect/influence. 　　Textron company in it 实验室 in in molding machine upper experiment/testing —Van Dorn 230 t and 350t, 一台Engel company 500t machine, and 一台HPM company 880t molding machine. Textron company in machine upper technology can 证. use according to molding dimensions active 确定. and training in can use in. Engel company and Van Dorn Demag company by can in it machine upper provide IntelliMold processing methods. 　　Textron company provide it IntelliMold processing methods types type type ∶Xtralite and Xtrasoft, front used for molding foam products, rear is types using/adopting mono machine molding di hardness, hard / soft products process methods.