[优秀毕业设计精品]汽车安全带导向环模具设计

2模具设计说明书课题名称汽车安全带导向环模具设计系别现代制造工程系专业高分子材料加工技术班级学号学生姓名指导教师起讫时间2011年3月15日2011年6月15日3摘要在目前激烈的市场竞争中，产品投入市场的迟早往往是成败的关键。模具是高质量、高效率的产品生产工具，模具开发周期占整个产品开发周期的主要部分。因此，如何在保证质量、控制成本的前提下缩短模具开发周期是值得认真考虑的问题。模具开发周期包括模具设计、制造、装配与试模等阶段。所阶段出现的问题都会对整个开发周期都有直接的影响，但有些因素的作用是根本的、全局性的。人的因素及设计质量就是这样的因素。根据塑料制品的要求，了解塑件的用途，分析塑件的工艺性、尺寸精度等技术要求，选择塑料制件尺寸。本模具采用一模两件，点G1144G8987G2487G17839料，G8892G4568G7438选XSZY150G3423G2507，G36G88G87G82G38G36G39G13484制G1120G13512G5647装G3282、G19658件G3282，选择模具G2524G10714的G2164工G7053G8873。G19480G990G16840G7138G1082，G13007G13491的G17828用G12628要的G7003G4395、G12628G7138的G12046G5859G3282G2656计G12651等分析塑件，G1186G13792作出G2524G10714的模具设计。关键词G51G51G727G20042出G7438G7512G727G8892G4568模G727点G1144G8987G2487G727G7024G9381G33714目录1A2A0611A4A162A6A3A5A7A8A9A10A11A10721A6A3A12A13A14A10722A7A8A12A13A14A10A15A169A19A17A19A17A18A7A8A12A13A14A10A20A21A22A15A169A19A17A19A17A19A7A8A9A10A23A24A15A169A19A17A19A17A25A28A26102A30A27A9A10A29A31A32A33A34A23A24A35A361021A9A13A29A31A32A33A20A6A31022A29A31A23A24A37A3610A19A17A19A17A18A40A29A31A38A20A39A4111A19A17A19A17A19A40A44A42A35A3613A19A17A19A17A25A40A9A13A43A45A46133A7A8A9A13A28A47A23A24A151431A9A13A48A49A50A51A7A81432A9A13A52A53A54A55A7A81433A9A13A20A28A47A23A24A15A7A8154A30A27A9A13A29A31A23A24A56A5717A60A5817A61A5917A63A62A65A64A66A67A68A6917A70A71A64A66A72A73A74175A75A76A77A78A70A71A64A66A79A801951A81A82A83A84A70A71A85A75A77A79A8019A86A87A88A87A88A89A90A91A92A93A94A9519A86A87A88A87A96A89A90A91A92A93A97A8519A86A87A88A87A98A89A90A99A100A70A71A101A102A103A104A91A105A106A94A95A65A106A97A85A691952A81A82A83A84A107A103A59A75A77A79A80206A108A66A109A93A110A111A112A113A70A114A115A93A79A892161A110A111A66A116A117A118A119A120A1212162A77A78A108A66A1092163A113A70A114A115A93A79A8922A122A87A98A87A88A123A124A125A79A8922A122A87A98A87A96A108A124A125A93A79A8923A122A87A98A87A98A113A126A79A8926A122A87A98A87A127A128A105A129A79A892664A79A89A130A131A132A133A131A114A115A79A892757A70A71A103A104A134A135A136A66A119A103A137A93A77A1382971A110A111A103A137A139A140A141A1422972A110A111A66A116A143A144A145A582973A103A146A145A583074A77A78A103A137A136A663075A147A148A149A77A103A137308A79A89A70A71A103A104A64A66A150A923181A64A66A150A92A134A135A79A893182A64A66A150A92A151A152A89A903283A64A66A150A92A151A152A153A154339A79A89A70A71A103A104A155A60A114A1153491A155A60A114A115A89A903492A155A60A114A115A134A135A79A893410A79A89A70A71A103A156A157A158A13535101A156A157A59FA89A9035102A110A111A156A157A158A135A159A14235103A113A70A114A115A160A105A161A1033611A79A89A70A71A103A143A162A108A66A163A164A158A13536111A143A162A163A164A158A135A136A66A77A7836112A165A166A167A143A162A163A164A158A135A79A89A89A90371121A163A164A168A132A163A164A59A93A89A90371122A163A164A59A93A89A90371131A110A111A165A166A167A93A151A1523812A103A104A72A169A170A119A150A92A1703913A134A171A1724014A134A171A17241A173A174A175A1764261引言11概述塑料工G1006是一G19388G20146G17907发G4649的G7044G3423工G1006，是G19555G11540G11719G8845工G1006的发G4649G5224G17828G13792生的。G1002G11040塑料工G1006的G2394G2502G1177有G28G19G5192，G13792G6117G3281塑料工G1006G17227G8505G1122G21G19G1002G13438G24G19G5192G1207，G2494有短短G24G19G5192的G2394G2502，但塑料工G1006的发G4649G17907度是G1182人的G701G13792G3835G3822G6980塑料件的制造是G19764模塑成G3423的。在现G1207工G1006生产中，G25G19G8G794G28G19G8的工G1006产品G19668要G1363用模具，模具工G1006G5062G13475成G1038工G1006发G4649的G3534G11796。根据G3281G19481生产技术G2339会的G20056G8991，G21G20G1002G13438G7438G7812制造工G1006G19658件G12907G2164工的G26G24G705，精G2164工的G24G19G705都G19668要G17902G17819模具G7481G4448成，G1866中G8785G17722、G11017G3132、G17902G1461、G11719G2282G2656G5326G12581等G15904G1006G7380G1038G12373出。72选择与分析塑料原料21选择制件材料G4445全G5114G4560G2533G10627G708G1120G13512如G328211、G989G13512G328212），G19668G3835批量生产，G17902G17819查参考资料得A17721A178A179A177A180A17722A181A179A177A1808PS具有非常好的G2282学稳定性、热稳定性、透光性透光率88G8G794G28G21G8，G11017绝缘特性是目前G7380G10714想的高频绝缘材料以及很微小的吸湿倾G2533。能够抵抗水、稀释的无G7438酸，但能够被强氧G2282酸如浓硫酸所腐蚀，并且能够在一些有G7438溶剂中膨胀变形。G51S的收缩率在G194G8G794G19G26G8之间，常用收缩率G19G24G8，G51S的流动性极好，成G3423G2164工容易。易G11540色，装饰性能好。G51S的G7380G3835缺点质地硬G13792脆，塑件由G1122内G5224力G13792易开裂。它的耐热性低，智能在不高的温度下G1363用，易老G2282。适用G1122制作绝缘透G7138件、装饰件及G2282学G3132、光学仪G3132等G19658件PE它的特点是软性，无毒，价廉，G2164工G7053便，识水性小，可不用干燥，流动性好，耐腐蚀性、G11017绝缘性优良。可以氯G2282辐照该性，可用玻璃纤G13512增强。高密度聚乙烯熔点、刚性、硬度G2656强度较高，吸水性小，有G12373出的G11017气性能G2656良好的耐辐G4568性。低密度聚乙烯柔软性、伸长率、冲击强度G2656透G7138性较好。适用G1122制作耐腐蚀G19658件、绝缘G19658件G2656薄膜等。PP密度小，强度、刚度、耐热性均由G1122HG39G51E，硬度比HG39G51E高，可在G20G19G19左右G1363用。具有优良的耐腐蚀性，良好的高频绝缘性，不G2475湿度影响，但低温变脆、不耐G11964、易老G2282。适用G1122制作一G14336G7438G7812G19658件、耐腐蚀G19658件G2656绝缘G19658件。ABSG13520G2524性能较好，冲击G19899度、力学强度较高，尺寸稳定，耐G2282学性，G11017性能良好G727易G1122成G3423G2656G7438G7812G2164工，与G22G26G21有G7438玻璃的熔接性良好，可作G2464色成G3423塑件，且G15932G19766可G19220G19136。适用G1122一G14336G7438G7812G19658件、G1955G6717耐G11964G19658件、G1268动G19658件G2656G11017G1461G13479G7512G19658件。PCG12373出的冲击强度，较高的G5389性模量G2656尺寸稳定性，无色透G7138，G11540色性好，耐热性比G4624G21869、聚G11014G18287高，抗G15849变的G11017绝缘性较好，耐蚀性、耐G11964性良好。但G14270G9082性G5058，不耐G11909、G18242、G14030、G7053G2533G13475。有G5224力开裂倾G2533，高温易水解，与G1866G1194G7653G14038G11468容性G5058。适用G1122仪G15932小G19658件、绝缘透G7138件G2656耐冲击G19658件。9对G3822料的性能与G5224用G17839G15904G13520G2524比较，材料品G12193可选择聚G1005烯G708G51G51）。22分析制件材料性能221分析制件材料的使用性能查参考资料G457塑料材料与配G7053G458及G11468关塑料模具设计资料可得PPG4658热塑性G13479G7242G3423塑料，密度G1038089091G/CM。PP制品有良好的G13520G2524力学性能，有较好的抗冲击性能，刚性G2656硬度较高，以及优良的耐G5379G7366G11142G2183性。G1866缺点是不耐有G7438溶剂，在G13055G3818G13459下易老G2282。PP的G1868G3423用途在G7438G7812工G1006G990用G7481制造G21843G17730、G2955G2506G17730、G17736G6227、G6238G6175、G12661G17959、G11017G7438G3818G3783、仪G15932G3783、仪G15932G11436、水G12677G3818G3783、G15000G11017G8756G8145G727G1931G15267G5223G2656G1924G12677G15936G18336等G727G8785G17722工G1006G990用PP制造G8785G17722仪G15932G7507，工具G14341G19388，G17722G17730G11434，G2465光G19248G11430，G6389G8889G7507、G6218G6175、热G12366G16855G14422G4560G12661、G2164热G3132等，G17836有用PPG3853G4630G7507制小G17747G17722G17722G17535PPG17836可以用G7481制作水G15932G3783、G13454G13467G3132材、G11017G3132G19658件、G7003G6957G1319G13958用品、G10621具、G11017G4388G10760、G11017G16817G7438G3783G1319、收G5417G7438G3783G1319、G6183G4395G7438键G11436、G11017G1924G12677、G20147品包装容G3132、G1904G14659G2955G19666G3132及G4490具等。222分析塑料工艺性能1无定形料，G1866品G12193G10272G2507很G3822，G2520品G12193的G7438G11017性能及成G3423特性G1075G2520有G5058G5334，G5224G6365品G12193G11842定成G3423G7053G8873及成G3423G7477件。2吸湿性小，G2559水量低，不用G1817分干燥。3流动性较好，G9334G17805料01MM左右。4料温对G10301料性能影响较G3835，料温G17819高易分解对要求精度较高塑件模温G4464G2474180G794G21G20G19，要求光G8913及耐热G3423料G4464G2474G208G19G794G21G22G19。G8892G4568G2399力用G7621G3634G5347G8892G4568G7438G7114料温G1038G20G26G19G794G21G25G19，G8892G4568G2399力G1038G20G19G19G794G204G19G48G51G68。G15758G7450G5347G8892G4568G7438G2029G2474G208G19G794G218G19、G26G19G794G20G19G19G48G51G68G1038G4464。5模具设计G7114要G8892G5859G8987G8892G13007G13491选择G1144G2487G1313G13634、形G5347、定出力G17819G3835或G7438G7812G2164工G7114塑件G15932G19766呈现“白色”痕迹，脱模G7024度G4464G2474G21以G990。10将聚G1005烯G708PP）的性能特点归类可得G1593211内容A18211A183A184A185A186A187A188A189A190A190A191A192A193A194A185A195A196A197A198A199A200A201A202A203A204A205A206A207A208A209A209A210A199A200A211A212A199A200A213A214A215A216A217A217A218A219A220A221A222A223A222A224A225A226A227A228A227A229A226A230A224A231A232110G794115A233A234A235A236A237A238A23910A240A241A242A243A244A245A246A247A248A249A250A246A251A252A253A254A255A35A0A251A11A236A41A1A2A44A3A46A47A46A48A46A49A46A50A4A52A5A251A11A6A254A236A55A7A8A9A46A59A249A10A9A6A12A236A62A13A250A246A236A44A248A249A251A64A0A251A11A253A254A64A65A14A15A16A252A17A18A19A20A71A72A21A22A9A12A236A75A23A251A6A254A24A251A78A246A26A27A236A80A28A29A30A31A32A33A236A87A28A29A247A17A0A251A11A34A15A16A36A251A37A87A244A38A39A236A93A40A28A29A42A246A15A16A66A43A34A15A16A45A51A712A100A53A251A54A236A103A50A56A57A236A237A58A60A61A63A67A713A75A23A251A68A4A236A112A69A2701MMA114A70A714A27A22A73A74A27A251A11A76A77A6A79A236A27A22A81A12A65A61A82A73A83A84A85A9A6A12A86A51A88A22A89A90180A129A130A91A132A240A236A83A84A124A92A34A44A94A16A27A89A90A91A135A132A129A130A95A132A240A71A137A96A97A59A140A243A98A99A101A137A96A17A1A27A22A102A91A131A132A129A130A104A132A240A236A137A96A97A59A102A91A132A132A129A91A105A132A106A107A108A71A150A109A101A137A96A17A110A90A91A135A132A129A130A135A132A240A46A131A132A129A91A132A132A106A107A108A102A89A715A88A126A111A113A1A83A137A115A116A137A117A118A119A120A121A122A123A125A46A26A101A46A246A127A59A81A79A128A17A18A19A20A1A86A51A133A134A136A138A173A174A175A176A177A139A236A179A88A141A9A89A90A130A181A182A142223结论滴灌G3132制件G1038工G1006用品，要求具有一定的强度、耐腐蚀性G2656耐G11964性能，中等精度。采用PP材料，产品的G1363用性能G3534本能满足要求，但在成G3423G7114，要G8892G5859选择G2524G10714的成G3423工艺，对原料不G19668要G17839G15904干燥、采用50G794G20G19G19G48G51G68的G8892G4568G2399力G2656G208G19G794G218G19的G8892G4568温度。2确定塑料成型方式及工艺过程21塑件成型方式的选择塑料成G3423的G12193类很G3822，包括G2520G12193模塑成G3423、G4630G2399成G3423G2656G2399延成G3423等。G1866中模塑成G3423G12193类较G3822，如G8892G4568成G3423、挤出成G3423、G2399缩模塑、G1268递模塑等，约占全部塑料制品G2164工量的90以G990。G1593212列出了常用的成G3423G2164工G7053G8873与模具。11A14312A144A145A146A147A148A149A151A152A153A154A155A156A157A158A149A151A152A153A149A151A155A156A145A1591A160A161A149A151A160A161A155A162A163A164A165A166A167A168A169A170A171A172A167A147A148A178A167A180A167A183A184A185A186A187A1882A189A190A149A151A191A155A192A193A167A194A167A195A167A196A197A167A162A198A199A200A167A201A202A151A203A1883A204A205A149A151A204A205A155A206A207A208A209A210A144A211A212A146A213A169A214A192A215A216A217A218A167A219A220A221A167A222A223A167A224A225A188A214A226A206A227A208A209A228A229A230A146A213A1694A231A232A155A147A231A232A155A233A234A235A155A156A149A236A230A214A237A238A239A240A241A242A243A244A241A245A246A247A248A249A250A251A2475A252A253A254A255A63A0A49A254A255A0A116A76A1A243A244A252A253A2A3A4A247A248A242A64A5A6A49A121A7A8A9A4A10A11A12A252A253A247A2486A124A13A14A125A253A13A14A0A116A76A15A243A244A9A4A16A17A12A247A248A242A128A18A19A20A21A22A23A12A237A24A238A25A26A74A27A253A28A13A14A0A116G13479论根据G990G15932格滴灌G3132的成G3423G7053G8873G5224选择G8892G4568成G3423。22成型工艺规程一个G4448整的G8892G4568成G3423工艺G17819程包括成G3423前准备、G8892G4568G17819程及塑件的后处G10714G989个G17819程。221成型前的准备1原料预处理1分析检验成G3423G10301料的质量对PP原料G17839G15904G2559水量、G3818观色G8913、颗粒情况、有无杂质并G8991试G1866热稳定性、流动性G2656收缩率等指标。如果检G8991中出现问题，G5224及G7114采G2474措施解决。对G1122粉状G10301料，在G8892G4568成G3423前，G13475常G17836G19668将G1866配制成粒料，因此G1866检验工作G5224放在配料后G17839G15904。2塑料G11540色粉状或粒状热塑料的G11540色，可以用直接G8873G2656间接G8873两G12193工艺实现。直接G8873G11540色G1075称G1038一G8505G8873G11540色或干G8873G11540色，G1866主要特点是将细分状G11540色剂与本色塑料G12628单掺混后即可直接用G1122成G3423，或G13475塑炼造粒后再用G1122成G3423。间接G11540色G8873又称G1120G8505G11540色G8873或色母料G11540色G8873，主要特点是在不直接用G11540色剂G13792用称G1038“母色料”的塑料粒G4388与本色塑料粒G4388G6365比例称量后放入混G2524G7438，G13475G1817分搅拌混G2524后送往成G3423设备G1363用。G11540色剂在G10301料中容易均匀分散、塑件色G8913鲜艳G2656无颜料粉尘造成G10627境污染等G7138显有点。此G3818，12这G12193G11540色G7053G8873G17836能是采用热风料斗干燥G11540色粒料成G1038可能，因G13792有利G1122实现G11540色塑件成G3423G17819程的全G14270动G2282。由G1122母色料粒G4388与本色塑料粒G4388G1177G12628单的混G2524，当用无混炼功能或G2494G19668混炼功能很G5058的成G3423设备成G3423颜色均一性要求高的塑件G7114，成G3423G10301料不能采用此G8873G11540色。3G20056热干燥对G1122吸湿性或粘水性强的成G3423G10301料，G5224根据G8892G4568成G3423工艺允许的G2559水量要求G17839G15904适当的G20056热干燥。目的是G1038了除去G10301料中G17819G3822的水分及挥发G10301，以防止成G3423后塑件出现气泡G2656银纹等缺陷，同G7114G1075可以避免G8892G4568G7114发生水降解。对G1122吸湿性或粘水性不G3835的成G3423G10301料，如果包装储存较好，G1075可不必G20056热干燥。PP的吸水性或水敏性较小，在成G3423前一G14336布G19668要干燥处G10714。2料筒的清理生产中如果G19668改变塑料品G12193、更换G10301料、G16855换颜色，或发现成G3423G17819程中出现了热分解或降解G2465G5224，均G5224对G8892G4568G7438的料筒G17839G15904清洗。G17902常，G7621G3634G5347料筒存料量G3835，必须将料筒拆卸清洗、对G1122G15758G7450G5347G8892G4568G7438G17902常采用直接换料、对G12366G8892G4568G8873清洗。换料清洗G7114，必须掌握料筒中的塑料G11430欲换的G7044塑料的特性，然后采用正G11842的清洗G8505骤。对G12366G8892G4568清洗G7114，G5224G8892G5859以下事项1G7044塑料成G3423温度高G1122料筒内残存塑料的成G3423温度G7114，G5224将料筒温度升高到G7044料的G7380低成G3423温度，然后G2164入G7044料，连续“对G12366G8892G4568”，直到残存塑料全部清洗G4448毕，再G16855整温度G17839G15904正常生产。2G7044塑料的成G3423温度比料筒内残存塑料的成G3423温度低G7114，G5224将料筒温度升高到残存塑料的G7380佳流动温度后切断G11017源，用G7044料或G7044料的回料在降温下G17839G15904清洗。3如果G7044料成G3423温度高，G13792料筒中残存塑料又是热敏性塑料，G2029G5224现流动性好、热稳定性高的塑料作G1038G17819度料，先换出热敏性塑料，在用G7044料或G7044料的回料换出热稳定性好的G17819渡料。4两G12193G10301料成G3423温度G11468G5058不G3835G7114，不必改变温度，先用G7044料的回料，后用G7044料连续“对G12366G8892G4568”即可。3嵌件的预热G1038了满足装配G2656G1363用强度的要求，塑件内常要G4896入G18341G4658G4896件。由G1122G1834113G4658G2656塑料收缩率G5058G2047较G3835，因G13792在塑件G1931G2376G7114，G4896件周G3272产生较G3835的内G5224力，G4560G14280G4896件周G3272强度下降G2656出现裂纹。因此，除了在设计塑件G7114G2164G3835G4896件周G3272的G3733G2414G3818，成G3423前对G18341G4658G4896件G17839G15904G20056热G1075是一项有效措施。G4896件的G20056热G5224根据塑料的性能G2656G4896件G3835小G13792定。对G1122成G3423G7114容易产生G5224力开裂的塑料，G1866塑件的G18341G4658G4896件，G4600G1866较G3835的G4896件一G14336都要G20056热。对G1122成G3423G7114不G4464产生G5224力开裂的塑料，且G4896件较小G7114，G2029可以不必G20056热。G20056热的温度以G6451G3363G18341G4658G4896件G15932G19766所G19220的G17775G4630或G19136G4630G1038G19492，一G14336G1038110G794G20G22G19，对G1122G15932G19766无G19220G4630的G19121G2524G18341或G19120G4896件，G20056热温度可G17810G20G24G19。4脱模剂的选用G8892G4568成G3423G7114，塑件的脱模主要G1393G17194G1122G2524G10714的工艺G7477件G2656正G11842的模具设计，当由G1122塑件本G17535的G3809杂性或工艺G7477件G7254不稳定，在试模G7114可G1363用脱模剂G5122G2173脱模。实G19481G990，在正常的生产情况下，G5224G4625量不G1363用脱模剂G1038好。常用的脱模剂有硬G14038酸G19168。G9094G1319G11719G15605G2656G11801G8845等。除了硬G14038酸G19168不能用G1122聚洗G14030之G3818，对G1122一G14336塑料，G990G17860G989G12193脱模剂均可G1363用。G1866中G4600以G11801G8845脱模效果G7380好，G2494要对模具施用一G8437，即可长效脱模，但价格很G17161。硬G14038酸G19168G17902常G3822用G1122高温模具，G13792G9094G1319G11719G15605G3822用G1122G1259低温模具。对G1122G2559有G8245G14026的软塑件或透G7138塑件不G4464采用脱模剂，G2554G2029将影响塑件的透G7138度。G1363用脱模剂G7114，G2955G9046G2524G10714、适量，以免影响塑件的G3818观G2656质量。222注射过程G4448整的G8892G4568成G3423G17819程包括G2164料、塑G2282、G8892G4568、保G2399、G1931G2376G2656脱模等G8505骤。但就塑料在G8892G4568成G3423中的实质变G2282G13792G16340，是塑料的塑G2282G2656熔G1319G1817满G3423G14120与G1931G2376定G3423两G3835G17819程。1塑料的塑G22822熔G1319G1817满G3423G14120与G1931G2376定G3423223塑件后处理塑件脱模后常G19668要G17839G15904适当的后处G10714，以便改G2904G2656提高塑件的性能G2656尺寸稳定性。塑件的后处G10714主要指G17876G9791或G16855湿处G10714。G17876G9791处G10714是G1363塑件在定温的G2164热G9094G1319G1183质或热G12366气G5502G10627G9900G12677中G19757G1363414一段G7114间。利用G17876G9791G7114的热量，能G2164G17907塑料中G3835分G4388G7506G5359，G1186G13792G9052除或降低塑件成G3423后的残G1325G5224力。对G1122G13479G7242G3423塑件，利用G17876G9791能对G1194G1216的G13479G7242度G3835小G17839G15904G16855整，或G2164G17907G1120G8437G13479G7242G2656后G13479G7242的G17819程。此G3818，G17876G9791G17836可以对塑件G17839G15904解G2474G2533，并降低塑件硬度G2656提高G19899性。生产中的G17876G9791温度一G14336都在塑件的G1363用温度以G990高G1122G1363用温度10G794G21G19G14279热变形温度以下低G1122热变形温度10G794G21G19之间的温度G2318间G17839G15904选择G2656控制。G17876G9791G7114间与塑件品G12193G2656塑件G2414度有关，如无G6980据资料，G1075可G6365G8611G8639G12871G2414度约G19668G2334小G7114的原G2029G1284G12651。G17876G9791后G5224G1363塑件G13543G1931G14279G4472温。有些塑件在高温下G19644G12366气接G16314会氧G2282变色或容易吸收水分G13792膨胀，此G7114G19668G17839G15904G16855湿处G10714，即将刚脱模的塑件放在热水中处G10714，这样G7094可G19560绝G12366气，G17839G15904无氧G2282G17876G9791，又可G1363塑件G5567G17907G17810到吸湿G5191G15925状G5589，G1363塑件尺寸稳定下G7481，以免塑件尺寸在G1363用G17819程中发生更G3835的变G2282。G5224当指出，并非所有塑件都有塑件都要G17839G15904后处G10714。G17902常，G2494是对G1122G5114有G18341G4658G4896件、G1363用温度G14551G3272变G2282较G3835、尺寸精度要求较高G2656G3733G2414G3835的塑件G6177有必要。3分析塑件结构工艺性31塑件尺寸精度分析该塑件尺寸精度一G14336精度，查参考资料G42G37G55G20448G25G16G20G28G28G22G16工程塑料模塑料件尺寸G1856G5058G15932可G11705塑料G1856G5058等G13435G1038MT7。标G8892主要尺寸G1856G5058如下G708单G1313均G1038MM。塑件G3818形尺寸5070、5045、5021、50505、505012、5010。塑件内形尺寸5050、505、5010、50505。32塑件表面质量分析塑件的G15932G19766G12907G12973度G15932查G1082G457塑料模具设计实用G6957程G458中的G1593234可G11705，15PPG8892G4568成G3423G7114，G15932G19766G12907G12973度的G14551G3272在AR0864M之间。G13792该塑件G15932G19766G12907G12973度G1038AR32M。33塑件的结构工艺性分析1制品结构简单，易于成型塑料制品设计G7114，G5224在满足塑料制品功能要求的前提下，力求G1363制品G13479G7512G12628单，G4600G1866要G4625量避免G8991G2533G1997G1996G13479G7512，因G1038G1403G2533G1997G1996G13479G7512G19668要模具增G2164G1403G2533G6289G14467或G7024G20042G7438G7512，G5347模具变的G3809杂，并G7378G2164制造成本。如果G1403G2533G1997G1996G13479G7512不可避免，G2029G5224该G1363G8991G2533G1997G1996G13479G7512G4625量G12628G2282，这G18336有两G12193G7053G8873可以避免G1363模具采用G1403G2533G6289G14467或G7024G20042G7438G7512强G15904脱模G2656对G6566。制品设计G7114除了G4625量避免G1403G2533G6289G14467G3818，G17836要力求G1363模具的G1866G1194G13479G7512G1075G12628单耐用，包括以下G1972G7053G19766。G20G3423G19658件G990不得有G4586利或薄G5381G13479G7512。模具G990的G4586利或薄G5381G13479G7512会影响模具强度及G1363用G4563G2641。制品设计G7114G5224G4625量避免这G12193G16949G19492出现。G21G4625可能的G1363分G3423G19766变得G12628单。G12628单的分G3423G19766G1363模具G2164工容易，生产G7114不易产生G20146G17805G8987G2487切除G1075容易。阶G7811形状的分G3423G19766模具G2164工较G1038G3268G19602。直G13459或G7366G19766，G1363模具G2164工变得较G1038容易。G22G4625可能G1363成G3423G19658件G12628单容易G2164工。2壁厚均匀G3733G2414均匀G1038塑料制品设计的G12544一原G2029，G5224G4625量避免出现G17819G2414或G17819薄的G14026G1313。G11540一点即G1363在G17728G16294部G1313G1075非常G18337要。因G1038G3733G2414不均匀会G1363制品G1931G2376后收缩不均，造成收缩G1997陷，产生内G5224力、变形及G11784裂等，G2490G3818，成G3423制品的G1931G2376G7114间G2474决G1122G3733G2414较G2414的部分，G3733G2414不均匀会G1363成形周期延长，生产性能降低。当G3733G2414有较G3835G5058G2047G7114，G5224G6289G2474G2414的部分，力求均匀G2282。在G1955G14026G7114，G5224G4625可能地G2164G3835内模G3423G14467，这是因G1038小内模G3423G14467的温度增高会G1363成G3423周期G2164长。后G3733G1955G14026后，G14521G5353G17227强度或装配的问题，可以增G2164G20604G1313或G1996G17227去解决。如果G2414G3733G19602以避免，G5224该用G9188变G2474G1207G7379G3733G2414的G12373然变G2282。3保证强度和刚度塑料制品的缺点之一是G1866强度G2656刚度G17840不如G19062G19093制品。如何提高塑料16制品的强度G2656刚度，G1363G1866满足产品功能的要求，是设计G13785必须考虑的。提高制品强度G2656刚度G7380G12628单实用的G7053G8873就是设计G2164强G12575，G13792不是G12628单用增G2164G3733G2414的G2162G8873。因G1038增G2164G3733G2414不G1177G3835G5145增G2164了制件的质量，G13792且易产生缩G4392、G1997痕等G11161，G13792设G13634G2164强G12575，不但能提高制件的强度G2656刚度，G17836能防止G2656避免塑料的变形G2656G13740G7366。设G13634G2164强G12575的G7053G2533G5224与料流G7053G2533G4625量保G6357一G14280，以防止G1817模G7114料流G2475到G2164搅G1093，降低制件的G19899性或影响制件G3818观质量。G2164强G7053G5347有G1403G3733G2164强、G5225部G2164强G2656G17805缘G2164强等。对G1122容G3132类制品，提高强度G2656刚度的G7053G8873G17902常都在G17805缘G2164强，同G7114G5225部G2164G3290G20604或G1582G6341G17227等G13479G7512。4装配间隙合理G2520制品之间的装配间G19565G5224均匀，一G14336制品间G19565G20G3278定件之间配G2524间G19565G19G19G24G794G19G20G80G80。G21G19766、G5225G3783止G2487间G19565G19G19G24G794G19G20G80G80。G22G16280G2029G6365G19074直G546415MM的G8975动间G1956501G794G19G21G80G80G727G16280G2029G6365G19074直G546415MM的