Shanghai Daoqin Plastics Co., Ltd.

        学 technology development, for pressure parts product safety property and type requirements improve/increase. according to use different, for parts quality evaluation has different. small to large 家讲讲 mold design is how effect/influence aluminum pressure parts quality. how to production high quality parts, for 节约材 material, can and shrink short manufacturing 工时, improve/increase 经济效益都 has very large 意义.

        一. effect/influence pressure parts quality factors

         effect/influence pressure parts quality factors very more, pressure machine type type and quality, pressure parts structure and technology requirements combined property, mold structure and as technology water and other.

        1. pressure parts design

         design 者应首先充 separation understanding use use requirements and as conditions, pressure parts force 情况, rear according to use requirements and as ring selection 适当 材质, understanding its pressure property can and other. in design 时, need especially attention/notes in meet/satisfy use requirements front lower, amount make pressure parts structure simple. thick uniform, has necessary 出模斜 degree, 否则会导致 pressure parts upper 出现凹坑, gas 孔, shrink 松, 欠铸, 拉痕, cracks, deformation and other defect.

         pressure parts dimensions degree requirements combined 理, 否则会 for mold design, mold processing, process conditions made and tube/pipe formed necessary 麻烦, also formed a large amount of combined product.

        2. mold structure, processing degree and mold material selection

         pressure parts is mold pressure 铸, mold design, processing, mold material selection and other and product quality has 密切关系. mold structure combined 理, from process upper 采取何 types measures, very difficult make product combined 格.

         in addition, mold material, mold processing degree, surface coarse degree, processing 痕迹, hot micro small 裂口, nitrogen thick degree and mold assembly and other, effect/influence product quality and mold lifespan.

        3.铸 parts material shrinkage rate

        铸 parts material shrinkage rate, generally 以平均百 separation rate or has 一定变化 scope/range separation rate to 出时, usually selection material shrinkage rate. for/regarding high degree pressure parts, design mold 时, selection material shrinkage rate especially attention/notes, necessary 时, can as experiment/testing mold, in experiment/testing mold upper need data rear, again design and manufacturing used for a large amount of production mold.

        4. pressure process made and 执行

         pressure process made and 执行, and mold, pressure equipment quality, as technology water has 关. in inner has pressure equipment conditions lower, for pressure process parameters also difficult achieve stability, can 靠, control. achieve basic control pressure process is will pressure equipment, pressure material and mold and other elements combined add use process. for process and main/primary parameters 不严执行, make pressure parts shrink 松, deformation, 欠铸, dimensions combined and other.

        二. pressure parts quality and mold 关系

         mold is pressure parts main/primary tool, therefore, in design mold 时, amount attention/notes make mold structure and mold parts structure combined 理, manufacturing, use, safety can 靠. need make mold in pressure in deformation, metal liquid in inner flow stability, can uniform make parts cooling, can full pressure 铸而无 fault/failure. in addition, need according to production amount, 材质情况 and other combined selection mold material.

        1. mold and mold parts structure need combined 理

         from strong/high degree 观点 看, mold parts design formed overall good, solid resistant use, in use in easy loss bad, easy deformation. is, if pressure parts complex, mold parts complex, make mold processing difficult, processing degree high. mold parts formed combined 式, processing large is 简化, easy obtain high processing degree, can obtain high quality pressure parts.

        2. type 腔数 决定

        决定 type 腔数, need equipment can force, mold processing difficult easy, production amount large small, parts degree requirements and other. especially is more type mold, due to mold processing difficult degree large, dimensions degree large, runner 配置不 easy 取 均衡, type parts property can 就不一致. pressure parts requirements degree high, 几何形状 complex 时, most good 一模一腔. small type parts according to 情况而定.

        3.浇注 system design

        浇注 system not only is liquid metal pressure type 通道, also for melt flow speed degree and pressure 传递以 and gas conditions, pressure type hot and other factors has adjustment function, therefore, design system must analysis parts structure features, technology requirements, alloy types type and its features, also need pressure machine type type and features and other, this can design combined 理 浇注 system.

        4.排 gas system design

         mold has 足够溢流 scope/range 溢流槽 and gas 通道, this for ensure product quality very important. 人们常常 overlook 溢流通道由进 metal liquid 早堵死 phenomenon. need using/adopting combined structure, make metal liquid 先流进溢流槽 relatively deep 部位, ensure gas in most long time inner is 通. in addition, 溢流槽应设 has material 杆, troubleshooting 溢流槽 in metal.

        5. mold temperature degree

         pressure temperature degree is effect/influence parts quality important factors. mold temperature 不当, effect/influence pressure parts inner outer quality (如铸 parts generate gas 孔, shrink 孔, hydrophobic 松, viscous film, coarse large and other defect), also effect/influence parts dimensions degree, 甚至铸 parts deformation, make pressure 铸模出现 crazing, make parts surface formed difficult remove 网状毛刺, effect/influence pressure parts appearance quality. aluminum alloy is 例, alloy temperature degree in 670-710℃浇入铸 type. in long production in, summary mold most temperature degree control in 浇入铸 type temperature degree 40%. aluminum alloy pressure mold temperature degree is 230-280℃, mold temperature degree in this scope/range inner has obtain excellent high parts.

         mold generally use gas or electrical add hot, using/adopting preheating cooling plant/unit, this plant/unit is according to requirements use as 介质, for mold preheating and cooling.

        6. molding parts dimensions 决定

        计算 pressure parts dimensions 时, selection pressure material shrinkage rate need combined 实际, 不然会导致 production product combined 格. necessary 时, through experiment/testing mold 实测之 rear, again pressure parts dimensions. for/regarding high degree product, need mold pressure parts material hot 膨胀以 and product pressure rear 保存, use ring for product dimensions degree effect/influence in inner.

        7. separation type 面位置 决定

         separation type 面 位置, effect/influence to mold processing, gas, product demolding and other. usually, separation type in product upper lower strip/profile 痕迹线, effect/influence product surface quality and dimensions degree. therefore, design separation type 面位置时, remove to product demolding, mold processing, gas and other issues outer, can separation type 面位置放 in product surface quality requirements high, or dimensions degree high 方.

        8. mold can deformation

        往往 due to mold structure combined or mold material selection 不当, formed mold in use in 裂口, deformation, 进而导致 product combined 格, is 此, in design mold 时, must 采取适当 measures ensure product quality.

         usually, pressure 铸时, mold inner pressure is 70-100MPa, is make mold deformation 错位, type need separation thick, type sheet/plate and sheet/plate need separation thick, necessary sheet/plate lower can increase 支垫. type and type need can 靠, type and 安装孔侧面 coarse degree need combined 适, coarse degree can low, 穿通孔 type 芯应两边 solid 定, anti product 一边壁 thick, 一边壁 thin. for product upper type 芯, from material 口部位, amount and type add solid upper method, make type force 均衡.

         for pressure can for type 腔, sheet/plate strong/high degree 校核. for type thick strong/high degree, rigid degree 校核, for sheet/plate rigid degree 校核. remove in mold structure upper certain ensure measures outer, also selection deformation small, strong/high degree good mold material. another, mold and sleeve/set between in 间隙, or 导柱, sleeve/set in use process in abrasion loss effect/influence to product quality. especially is dimensions degree high product, is ensure product degree, can in separation type upper 设置动, 定模锥面配 combined separation, or in type 腔周围适当 方设置2-4 定位杆, 起定位 and reinforcement function, anti 止动, 定模错位, this for large type, large amount production use more is important.

         launch system 应设置导柱, anti 止推杆 and other as 不平稳, mono abrasion loss, ensure product force uniform, ejection make product deformation.