Shanghai Daoqin Plastics Co., Ltd.

        先 看看 below/following principle

        一, high light injection molding principle

        1, mold molding for temperature degree requirements relatively high (generally is 80℃-130℃ left right), in injection molding holding pressure rear use cooling water, make mold temperature degree drop 至60-70℃. relatively high mold temperature lower holding pressure molding has 利于消 remove weld lines, flow marks, product internal stress and other defect. therefore mold in as 时需进行 add hot 处理, is anti hot amount loss 失, usually in 定模侧 add thermal insulation sheet/plate.

        2, mold cavity surface degree light 亮(generally is 镜面2 grade or more high). high light mold production product can used for machine (assembly), 无需做任何 surface treatment. therefore it for mold and plastics material requirements very high.

        3, hot runner system hot relatively more, hot 喷咀必 must belt/tape 封针且 has gas 道, through electrical magnetic and time electrical appliances and other mono control, achieve separation 时进胶, from to control 甚至消 remove 熔接痕 目, control methods complex.

        4, mold add hot methods usually has water gas (hot water) add hot and electrical hot rod (tube/pipe) add hot types. water gas (hot water) add hot methods is through temperature machine in injection molding process in to mold 输入蒸 gas (hot water), from make mold fast speed rise temperature; in injection molding rear use cold water cooling mold, make mold fast speed drop temperature. electrical add hot methods and water add hot temperature machine, in principle upper is 一样, is hot 源不一样, electrical add hot is can 源, water add hot is can 源, principle electrical add hot can loss consumption less, utilizing rate high, energy saving good. use 方便, therefore 说: if is sheet/plate (面) product also is using/adopting electrical add hot methods 实慧.

        二, mold material

        1, product surface requirements mold material can use NK80(Japan large 同);

        2, high light requirements material selection S136H(瑞典), CEANA1(Japan);

        3, NK80 can use 淬火处理;S136H应 in coarse processing rear 淬火至52 degree;CEANA1本身 tool 备42 degree need 淬火处理(建议 use 此钢材, effect/influence rear processing or 改动);

        4, Germany 葛利兹 Brand in has selection;CPM40/GEST80

        三, mold water design

        1, water using/adopting 5-6mm large small 孔径; water use 1/8 or 3/8 牙(mold 侧), 另一侧 use 3/4英 made 螺纹(老式接 method); pipe fittings material use 不锈钢 tube/pipe;现 in 我们改 formed 一进一出, separation most good is in mold inner, using/adopting can use DN25(inner outer 喇叭**接)连接, this hot can loss consumption less, **方便, 接口方便.

        2, water 道一侧离 product generally selection 5-6mm;选 large for mold rise temperature time has effect/influence, small for mold strong/high degree has effect/influence. water 道平行 product must need uniform 排布(原质 in 心15mm and other distribution) hot electrical design in water in 间, deep degree in 50mm above, most large ultra- 100mm, mold structure active 掌握. sleeve/set mold PT100 is 一配一, maintain it degree, must it to mold type 腔模仁 inner, add solid 定. use 引线连 to mold outer 侧, again to temperature machine base/seat upper.

        3, mold water 道接头必 must design in mold upper lower or rear 侧端;操 as 侧(站人一侧)不允许 has water export or water tube/pipe 排布, tube/pipe 子破裂汤伤 production 人员. 切记!

        4, mold water using/adopting separation sheet/plate design, water hot mold temperature machine system has 一进一出接口, decrease/reduce more water tube/pipe 连接, decrease/reduce hot can necessary loss consumption;且达 to ** and energy saving 目. 且波纹 tube/pipe outer table/sheet use thermal insulation tape 缠绕, to temperature and ** function.

        5, mold 施工孔洞(不 need 孔洞), need use 堵头堵塞, ensure gas water, methods is use copper 堵, rear again use degree add high temperature resistance 胶密封; high light mold for cooling water 道 排布 comparison 讲究(water hot mold water is use), good water 道排布 not only can large large improve/increase injection molding efficiency, but also in improvement product quality 方面也起 to important function. high light mold water not only need uniform but also must need separation (need has 足够 数 amount). this for mold rise temperature very fast; meanwhile, using/adopting add long water tube/pipe will 模芯运 water 引出而不 using/adopting 密封圈, this can anti mold long in high temperature lower as 业, make 密封圈 aging, can reduce many mold repair cost. value is, high light mold water tube/pipe must using/adopting high temperature resistance material (250℃)波纹 tube/pipe. high pressure 1.6Mpa tube/pipe, anti high temperature high pressure lower water tube/pipe 爆裂. for/regarding type product using/adopting ring water; for/regarding long strip/profile product using/adopting 平行运 water water 道. for/regarding high degree large product using/adopting water 井形式; for/regarding product using/adopting and product outer type 一至 三维运 water methods.

        四, mold thermal insulation system

        1, mold 定模镶芯 or 动模镶芯四面 need to 掏空处理;模 frame and need has 一定 间隙(视 mold material thermal expansion coefficient, mono 面1mm). anti frame 膨胀, decrease/reduce 模芯于模 frame 接触面, to make hot can loss consumption most small 化;模芯 and frame using/adopting 斜契式 or its it similar methods, front using/adopting thermal insulation obvious powder resin or its it material (如石棉 sheet/plate).

        2, frame and detailed structure, frame cooling water non important, is anti 止模仁 in hot can 传至模 frame, need in 靠近导柱位置, upper lower 排布一圈运 water.??

        3, sleeve/set 运动部位尽 can can using/adopting 石墨材 material or 者 导柱 front 端避空处理, combined need ensure 25mm long degree 就足够;

        五, mold gate design

         mold gate design need can can decrease/reduce 熔接痕, has 利于排 gas and decrease/reduce 剪切. for using/adopting water add hot temperature machine mold, gate dimensions need large and amount using/adopting large gate 进胶, in effect/influence product machine can and molding efficiency lower, gate amount shrink short its long degree, deep degree, wide degree. gate small, easy formed short shot (short 射), shrinkage 凹陷, weld lines and other appearance upper defect, molding shrinkage increase large. gate large, gate generate residual stress, 导致产口 deformation or 破裂, gate remove processing difficult and other. most good selection gate, remove non flow ratio ultra- 实际 极限. resin flow long degree 曲线图, will provide in certain 一确定 molding conditions lower material flow long degree. more gate generate weld lines and 熔接痕. remove long, narrow product, using/adopting mono gate will ensure more 一致 材 material, temperature degree, holding pressure distribution, more good combined 效果.

        六, mold gas;

        尽 can can in product versus 隔10mm is 一段, uniform distribution gas 槽, deep degree is 0.15mm; product in 间贴面也 need gas design;

        七, mold separation type combined;

        因 is high light mold temperature degree high low has very large 落差, therefore 贴面配 combined requirements relatively high, meanwhile need decrease/reduce 贴面 面积, separation type 面四周 has 10mm配 combined 就够.

        八, add hot rod (tube/pipe) high light mold design

        1, in gate upper lower need has electrical hot rod (tube/pipe), cooling water generally is 6mm(can large more good);两 water in 心距离 is 15-20mm; add hot rod product surface is 5mm, add hot rod between in 心距离 is 20mm; cooling water add hot rod 壁距离 is 6-8mm, has conditions most good and electrical hot rod 穿插排布.

        2, inner mold cavity water can use high temperature resistance 密封圈密封 or using/adopting hard methods;

        3, add hot rod is 4.92mm, mold design is 5mm, assembly add hot rod front use 5mm abrasion add hot rod 毛刺 掉.

        4, mold water using/adopting and water add hot mold separation sheet/plate design (cooling water), is electrical hot mold control system has 一进一出 water pipeline.

        九, high for product requirements

         high light mold for product structure requirements very 严格, light product for light 折射效果越敏感, surface has defect very fast by 发现, therefore how to solution sink marks issues is high light product need issues. generally product thick degree ultra- 主体胶位 thick degree 0.6mm倍便不 sink marks, or sink marks relatively small easy by 发现, can 忽略不计. for high light product 而言, this requirements 远远不够, also will product thick degree decrease small to ultra- 主体胶位 thick degree 1倍, for/regarding filament also must 做火山口式斜顶 structure.

        十, high light for plastics material selection

         currently commonly used high light plastics material is HIPS and ABS+PC. as is commonly used types machine housing/shell material, tube/pipe ABS+PC 志本会 large 一, molding product in resistant impact property, surface gloss degree and hardness 方面都 ratio HIPS good, therefore in production high light product 时, usually selection is high light ABS材 material. ABS belongs to 无定形 polymer, obvious melting point. due to its grade product grade more, in plastics process in product grade different made combined process parameters, generally in 160℃ above, 270℃ below/following can molding. in molding process in, ABS heat stabilized property good, can selection scope/range relatively large, easy degradation or separation understanding. 且ABS melt viscosity in, its flow property ratio poly 本烯(PC), polycarbonate (PC) and other need good, but also melt cooling solid speed degree ratio fast, generally in 5-15秒 inner can cold solid. ABS flow property and injection temperature degree and injection pressure has 关系, its in injection pressure 稍敏感. is 此, in molding process in can can from injection pressure 入手, reduce its melt viscosity, improve/increase property can. ABS因组 separation different, water and viscous water property can 各异, its surface viscous water and water absorption in 0.2%-0.5%, has can 达0.3%-0.8% between, is to relatively is products, in molding front as drying 处理, make water amount drop 至0.1% below/following. made parts surface will 会出现 bubbles, silver streaks and other product. can plastics material need 1% metal powder improve/increase high light 效果.

        十一, mold light and maintenance

         in plastics mold processing in 说 抛 light and its it industry in requirements surface light has very large different, 严格 说: mold light 应该称 is processing. it not only for light has very high requirements and for surface degree, light slip degree and 几何精确 degree has very high standards. surface light generally requirements obtain light surface can. processing standards separation is grade: AO=Ra0.008um, A1=Ra0.016um, A3=Ra0.032um, A4=Ra0.063um, due to electrical understanding light, 流体抛 light and other methods very difficult control parts 几何精 degree, chemical light, ultra- 声波抛 light, magnetic abrasion light and other to methods surface quality also to requirements, therefore precision mold processing also is machine light is 主.

        1, machine light basic 程序, need obtain high quality light 效果, most important is need tool high quality 油石, and abrasion and other light tool and product. most important also has light as ring 境, requirements is workshop. light selection 取决于 front processing surface 状况, machine processing, electrical processing, abrasion processing and other and other.

        2, machine light generally process lower:

        一, coarse 抛, 精铣, electrical 火花, abrasion and other process rear surface can selection speed in 35000-40000rpm surface light machine or ultra- 声波研 abrasion machine 进行抛 light. commonly used methods has utilizing 直径3mm, WA#400 轮子 remove white electrical 火花层. rear is 手工油石研 abrasion, strip/profile 状油石 add as is lubricant or cooling agent. generally use is #180-#240-#400-#600-#1000. many mold manufacturing is time selection from #400开始.

        3, semi main/primary use and 煤油. 砂纸 号数依次 is: #400-#600-#800-#1000-#1200-#1500. upper #1500砂纸 use 适于淬 hard mold 钢(52HRC above), suitable for hard 钢, is this can can 会导致预 hard parts surface 烧伤.

        4, main/primary make 钻石研 abrasion 膏. usually abrasion is 9um(#1800)-6um(#3000)-um(8000). 9um 钻石研 abrasion and light can use remove #1200 and #1500号砂纸留 lower abrasion 痕. use viscous and 钻石研 abrasion 膏进行抛 light, is 1um(#14000)-1/2um(60000)-1/4um(#100000). degree requirements in 1um above (包括号1um) light process in mold light must 一 绝 for 洁净 空间. 灰尘, 烟雾, 头皮屑 and water has can can waste small as rear to high degree light surface.

        二, 1, machine light in need attention/notes issues, use 砂纸抛 light attention/notes below/following 几点;

        1, use 砂纸抛 light need utilizing soft rod or rod. in light or 球面时, use soft rod can more good combined and 球面 弧 degree. relatively hard strip/profile 像樱桃木, more suitable for surface light. strip/profile make its can and parts surface maintain combined, this can 避免木 strip/profile 锐角接触钢 parts surface formed relatively deep 划痕.

        2, use different Model/Grade 砂纸时, light direction 应变换45°-90°, front types Model/Grade 砂纸抛 light rear lower strip/profile anionic can analysis 出. in different Model/Grade 砂纸之 front, must use 100% pure 棉花沾酒精之 type liquid for light surface 进行仔 fine scratch 拭, is very small 沙砾留 in surface 都会毁 bad lower 整 抛 light as. from 砂纸抛 light formed 钻石研 abrasion light 时, this process important. in light 继续进行之 front, has pellets and 煤油都必 must by full dry 净.

        3, is scratch and 烧伤工 parts surface, in use #1200 and #1500砂纸进行抛 light must especially small 心. is has necessary add light 载荷以 and using/adopting 两步抛 light method for surface 进行抛 light. use types Model/Grade 砂纸进行抛 light 时都应沿两 different direction 进行两面三刀次抛 light, 两面三刀 direction between 每次转动45°-90°.

        三, 钻石研 abrasion light attention/notes lower 几点;

        1, this type of light must amount in relatively light pressure lower especially is light hard parts and fine abrasion light 时. in use #8000研 abrasion 膏时, commonly used is 100-200g/cm², need maintain 此载荷 精 degree very difficult to. is more easy to this 一点, can in strip/profile upper thin narrow 手柄, ratio add copper sheet/slice; or in strip/profile upper separation make its more soft. this can control light pressure, ensure mold surface pressure high.

        2, use 钻石研 abrasion light 时, not only is as surface requirements 洁净, as di 手也必 must fine dry 净.

        3, 每次抛 light time long, time short, 效果越 good. if light process long formed 点蚀.

        4, is obtain high quality light 效果, easy hot light methods and tool 都应避免. ratio 如;抛 light light, light generate hot amount very easy formed 桔皮.

        5, light process 停止时, ensure parts surface and fine remove has abrasion agent and lubricant non important, rear in surface 喷淋一层 mold anti coating.

        四, effect/influence mold light quality factors

         due to machine light main/primary also is 靠人工完 formed, therefore light technology currently also is effect/influence light quality main/primary causes. remove outer, also and mold material, light front surface 状况, hot process and other has 关. excellent 质 钢材 is obtain good light quality front conditions, if surface hardness or features upper has 差异, 往往会 generate light difficult. in types type material and gas 孔都不利于抛 light.

        一, different hardness for light process effect/influence

        二, hardness increase high make abrasion difficult increase large, light rear coarse degree decrease small. due to hardness increase high, need to relatively low coarse degree 需 抛 light time versus growth. meanwhile hardness increase high, light degree can can property versus decrease/reduce.

        三, parts surface for light process effect/influence

        钢材 in machine processing process in, surface hot amount, internal stress or its it factors loss bad, parameters 不当会 effect/influence light 效果, therefore requirements use high speed CNC精 processing, processing amount control in 0.05-0.07mm.JN electrical processing rear surface ratio machine processing or hot rear surface more difficult abrasion, therefore electrical processing front using/adopting 精规准 electrical 火花修整,否则 surface formed hard 化溥层. if electrical 火花精修规准 selection 不当, hot effect/influence deep degree most large can 达0.4mm. hard hardness ratio basic hardness high, must remove. therefore most good increase coarse abrasion processing, 彻底清 remove loss bad surface 层, formed sheet/slice coarse metal 面, is light processing provide 一 良 good 基础.

        十二, high light mold maintenance

        1, mold parts surface 平时必 must has high and other grade anti agent or use film 封贴, anti and gas 直接接触, 导致生锈;

        2, anti 止任何杂 material or 手直接 and type 腔面接触;

        3, 清洗镜面工 as, using/adopting high density 纸巾喷 upper agent upper lower light light scratch 洗, can scratch 洗;不 can use medical grade and strip/profile;不 can use **直接 in parts upper 吹, is gas tube/pipe inner material water gas 都会导至工 as surface loss bad.

        4, mold production rear or mold trial rear, must use ** mold water inner 吹净, anti mold 模仁生锈,