塑料件尺寸公差及性能

1、標(biāo)準(zhǔn)塑料件尺寸公差1. 范圍本標(biāo)準(zhǔn)規(guī)定了注射、壓制、擠塑等成型的熱塑性和熱固性塑料（不包括二次加工和發(fā)泡成型的塑料件）尺寸公差、偏差、公差等級(jí)的選用、測(cè)量條件和測(cè)量方法。本標(biāo)準(zhǔn)主要適用于電子產(chǎn)品用塑料件尺寸公差，其他產(chǎn)品用塑料件尺寸公差，亦可參照米用。2. 引用標(biāo)準(zhǔn)下列標(biāo)準(zhǔn)所包含的條文，通過(guò)在標(biāo)準(zhǔn)中引用而構(gòu)成本標(biāo)準(zhǔn)的條文。在標(biāo)準(zhǔn)出版時(shí)，所示版本均為有效。所有標(biāo)準(zhǔn)都會(huì)被修訂，使用標(biāo)準(zhǔn)的各方應(yīng)探討使用下列標(biāo)準(zhǔn)最新版本的可能性。GB1800-79公差與配合總論標(biāo)準(zhǔn)公差與基本偏差GB3177-82光滑工件尺寸的檢驗(yàn)GJB4458.5-84機(jī)械制圖尺寸公差與配合注法3. 定義3.1 基本尺寸basics

2、ize設(shè)計(jì)給定的尺寸。3.2 實(shí)際尺寸actralsize通過(guò)測(cè)量所得的尺寸。3.3 尺寸公差dimensionaltolerance允許尺寸的變動(dòng)量。3.4 尺寸偏差dimensionaldeviation某一尺寸減去基本尺寸所得的代數(shù)差。3.5 塑料收縮率plasticshringkage塑料件尺寸與相應(yīng)模具尺寸之差的絕對(duì)值與相應(yīng)模具尺寸之比。3.6 徑向收縮率radialshringkage指料流方向的塑料收縮率。3.7 切向收縮率tangentialshringkage指垂直于料流方向的塑料收縮率。3.8 收縮特性值contractionchararcteristicvalue表示料流

3、方向和垂直于料流方向的塑料綜合收縮能力，以2倍徑向減去切向收縮的絕對(duì)值之差表示。3.9 受模具活動(dòng)部分影響的尺寸sizeeffectedmovablepartsofmould由模具活動(dòng)零件決定的塑料件尺寸。4公差及偏差規(guī)定4.1 尺寸公差、偏關(guān)的規(guī)定基本尺寸范圍為3至600mm?；境叽绶侄?至120mm。采用不均勻遞增數(shù)列：1401600mm,采用R20優(yōu)先數(shù)系。4.2 公差等級(jí)及數(shù)值公差等級(jí)分為10級(jí)，每一級(jí)公差數(shù)值按表1規(guī)定。4. 3偏差的規(guī)定本標(biāo)準(zhǔn)只規(guī)定公差，而基本尺寸的上下偏差，可按需要分配。例如：60mm的6級(jí)公差為0.32mm,其上下偏差可分配為：+0.300+0.20+0.42

4、+0.16600mm,60.032mm,60.012mm,60+012mm,60.016mm4 .4受模具活動(dòng)部分影響的尺寸公差受模具活動(dòng)部分影響的尺寸公差，為本標(biāo)準(zhǔn)規(guī)定的公差值與附加值之和。1、2級(jí)附加值為0.02mm：3、4級(jí)附加值為0.04mm：5至7級(jí)附加值為0.1mm：8、10級(jí)附加值為0.2mm：文案標(biāo)準(zhǔn)5 未注公差尺寸未注公差，按表1規(guī)定的710級(jí)公差選用公差等級(jí)的選用公差等級(jí)的選用，按表2規(guī)定?；境叽绻畹燃?jí)12345678910公差數(shù)值30.020.030.040.060.080.120.160.240.320.48>360.030.040.050.070.080.1

5、40.180.280.360.56>6-100.030.040.060.080.100.160.200.320.400.64>10-140.030.050.060.090.120.180.220.360.440.72>14-180.040.050.070.100.120.200.240.400.480.80>18-240.040.060.080.110.140.220.280.440.560.88>24-300.050.060.090.120.160.240.320.480.640.96>30-400.050.070.100.130.180.260.360.

6、520.721.0>40-500.060.080.110.140.200.280400.560.801.2>50-650.060.090.120.160.220.320.460.640.921.4>65-800.070.100.140.190.260.380.520.761.01.6>80-1000.080.120.160.220.300.440.600.881.21.81200.090.130.180.250.340.500.681.01.412.01400.100.150.200.280.380.560.761.11.52.21600.120.160.220.310

7、.420.620.841.21.82.41800.130.180.240.340.460.680.921.41.82.72000.140.200.260.370.500.741.01.52.03.02250.150.220.280.410.560.821.11.62.23.32500.160.240.300.450.620.901.21.82.43.62800.180.260.340.500.681.01.32.02.64.03150.200.280.380.550.741.11.42.22.84.43550.220.300.420.600.821.21.62.43.24.84000.240.

8、340.460.650.901.31.82.63.65.24500.260.380.520.701.01.42.02.84.05.65000.300.420.600.801.11.62.23.24.46.45600.340.460.640.881.21.82.43.64.87.16300.380.520.720.991.32.02.73.95.47.97100.420.600.801.11.52.23.04.46.08.88000.460.640.901.21.72.53.34.96.79.89000.520.721.01.41.92.83.85.57.510.810000.600.821.2

9、1.62.23.24.36.08.512.812000.761.01.41.82.53.557101414000.881.21.62.53.04.068111616001.01.41.83.03.55.0791318注：表中公差值用于基準(zhǔn)孔或非基準(zhǔn)孔時(shí)?。?）號(hào)；用于基準(zhǔn)軸或非配合軸?。?）值,用于非配合長(zhǎng)度取半值冠以正負(fù)（士）號(hào)文案標(biāo)準(zhǔn)材料相應(yīng)的公差等級(jí)收縮特性值代號(hào)名稱高精度一M精度低精度0-1ABS苯乙烯-丁二烯-丙烯月青共聚物345AS丙烯月青-苯乙烯共聚物GRD30%玻璃纖維增強(qiáng)塑料HIPS局沖擊強(qiáng)度聚苯乙烯MF氨基塑料PBTP聚對(duì)苯酸丁二酯PC聚碳酸酯PETP聚對(duì)苯酸丁二酯PF酚醛

10、塑料PMMA聚甲基丙烯酸甲酯PPE聚苯硫醴（增強(qiáng)）PPO聚苯醛PPS聚苯WCPS聚苯乙烯PSU聚碉1-2PA聚酰胺6、66、610、9、1010456氯化聚醴PVC聚氯乙烯（硬）2-3PE聚乙烯（高密度）678POM聚甲醛PP聚丙烯3-4PE聚乙烯（低密度）8910PVC聚氯乙烯（軟）注：1、其他材料，可按加工尺寸的穩(wěn)定性，參照表2選取公差等級(jí)。2、1、2級(jí)為精密級(jí)，只有在特殊條件下才采用。3、當(dāng)沿脫模方向兩端尺寸均在要求時(shí)，應(yīng)考慮脫模斜度對(duì)公差的影響。4、其他增強(qiáng)塑料的收縮特性性值，應(yīng)比表2中規(guī)定的小，或由試驗(yàn)結(jié)果定。6 測(cè)量方法6. 1公差測(cè)量條件a.標(biāo)準(zhǔn)測(cè)量溫度為20±2C；b

11、.相對(duì)濕度為（65±5）%c.待塑料件成型后24h及“后處理”后進(jìn)行測(cè)量7. 2公差的測(cè)量方法公差的測(cè)量方法和量具，按GB3177勺規(guī)定。8. 公差的注法公差的注法，按GB4458.5的規(guī)定。文案標(biāo)準(zhǔn)NOMINALDIMENSIONS(mm)TOLERANCES(mm)FineCommercialUpto1Over1uptoandinc30.050.060.070.08Over3uptoandinc60.070.09Over6uptoandinc100.080.09Over10uptoandinc150.080.11Over15uptoandinc220.090.13Over22up

12、toandinc300.110.14Over30uptoandinc400.130.17Over40uptoandinc550.140.20Over55uptoandinc700.170.24Over70uptoandinc900.200.29Over90uptoandinc1200.250.35Over120uptoandinc1600.300.43Over160uptoandinc2000.360.51Over200uptoandinc2500.440.68Over250uptoandinc3150.550.85Over315uptoandinc4000.701.08Over400upto

13、andinc5000.901.38Over500uptoandinc6501.201.83Over650uptoandinc8001.502.28Over800uptoandinc10001.902.90Over1000uptoandinc12002.303.50Over1200uptoandinc14002.654.05Over1400uptoandinc16003.054.65Over1600uptoandinc18003.405.20Over1800uptoandinc20003.805.80TABLE1:DIMENSIONALTOLERANCES-GROUP1MATERIALSTABL

14、E2:DIMENSIONALTOLERANCES-GROUP2MATERIALSNOMINALDIMENSIONS(mm)TOLERANCES(mm)FineCommercialUpto1Over1uptoandinc30.060.070.080.09Over3uptoandinc60.080.10Over6uptoandinc100.080.12Over10uptoandinc150.100.14Over15uptoandinc220.110.17Over22uptoandinc300.130.20Over30uptoandinc400.150.23Over40uptoandinc550.1

15、80.27Over55uptoandinc700.210.33Over70uptoandinc900.260.41Over90uptoandinc1200.310.50Over120uptoandinc1600.380.62Over160uptoandinc2000.450.79Over200uptoandinc2500.600.95Over250uptoandinc3150.751.20Over315uptoandinc4000.981.63Over400uptoandinc5001.282.13Over500uptoandinc6501.732.88Over650uptoandinc800

16、2.183.63Over800uptoandinc10002.804.63Over1000uptoandinc12003.355.55Over1200uptoandinc14003.906.50文案標(biāo)準(zhǔn)Over1400uptoandinc16004.507.40Over1600uptoandinc18005.058.30Over1800uptoandinc20005.609.25TABLE3:DIMENSIONALTOLERANCES-GROUP3MATERIALSNOMINALDIMENSIONS(mm)TOLERANCES(mm)FineCommercialUpto1Over1uptoan

17、dinc30.070.080.100.11Over3uptoandinc60.080.12Over6uptoandinc100.100.14Over10uptoandinc150.120.17Over15uptoandinc220.140.20Over22uptoandinc300.170.24Over30uptoandinc400.190.28Over40uptoandinc550.230.34Over55uptoandinc700.280.41Over70uptoandinc900.340.51Over90uptoandinc1200.410.62Over120uptoandinc1600

18、.520.79Over160uptoandinc2000.651.00Over200uptoandinc2500.801.20Over250uptoandinc3151.001.50Over315uptoandinc4001.352.05Over400uptoandinc5001.752.65Over500uptoandinc6502.353.55Over650uptoandinc8002.954.45Over800uptoandinc10003.755.65Over1000uptoandinc12004.506.80Over1200uptoandinc14005.257.90Over1400

19、uptoandinc16006.009.05Over1600uptoandinc18006.7510.15Over1800uptoandinc20007.5011.30文案標(biāo)準(zhǔn)MOULDSHRINKAGEANDCOEFFICIENTSOFLINEAREXPANSION文案標(biāo)準(zhǔn)Note:Themouldshrinkageandcoefficientofexpansionoffibrefilledmaterialswillvaryindirectionsparallelandperpendiculartotheflow.常用材料性能MATERIALMouldpercentShrinkageCoef

20、f.linearexpansion10-6/-1ABS0.4-0.850-110ABS-30%glassfilled0.1-0.335-50Acetal1.5-2.590-150Acetal-30%glassfilled0.5-1.535-80Acrylic0.2-0.850-90CelluloseAcetate0.3-0.880-160CelluloseAcetateButyrate0.2-0.7110-170DiallylPhthalate0.2-0.910-60EthyleneVinylAcetate0.7-1.2230-250MelamineFormaldehyde0.6-0.810-

21、50Nylon60.6-2.570-170Nylon6-30%glassfilled0.2-1.215-30Nylon660.7-2.560-110Nylon66-30%glassfilled0.2-1.215-30Nylon110.9-2.090-150Nylon11-30%glassfilled0.3-0.710-40Nylon120.3-2.090-130Nylon12-30%glassfilled0.5-1.530-70PhenolFormaldehyde0.2-1.515-30Polycarbonate0.5-0.820-70Polycarbonate-30%glassfilled0

22、.2-0.620-30Polycarbonate/ABS(Bayblend)0.4-0.770-85Polyester,laminates0.1-1.210-50Polyester,thermoplasticPolybutyleneTerephthalate1.2-2.380-180PolybutyleneTerephthalate-30%glassfilled0.2-1.530-60PolyethyleneTerephthalate1.3-1.670-150PolyethyleneTerephthalate-30%glassfilled0.2-2.020-40Polyester,thermo

23、plasticelastomer0.3-1.4140-210Polyethylene,lowdensity1.0-4.4200-250Polyethylene,highdensity1.5-3.3150-200PolyethyleneOxide-mod-(Noryl)0.5-0.760-70PolyethyleneOxide-mod-30%-glassfilled0.1-0.320-30Polypropylene1.3-2.5110-170Polypropylene-20%talcfilled0.8-1.870-110Polypropylene-20%glassfilled0.7-2.060-

24、140Polypropylene-asbestosMed0.4-1.220-40Polypropylene-rubbermodified0.8-2.050-140Polystyrene0.2-0.835-100Polyurethanethermoplasticgreaterthan50ShoreD0.8-1.8130-120equalorlessthan50ShoreD1.0-2.0150-225Polyurethane,RIM1.2-1.890-150Polyurethane,RRIM0.3-0.630-180PolyvinylChloride-rigid0.2-5.050-100Polyv

25、inylChloride-flexible0.7-5.070-250StyreneAcrylonitrile0.2-0.650-110UreaFormaldehyde0.6-1.430-50通用塑料：價(jià)格低、產(chǎn)量大、用途廣；酚醛塑料PF,氨基塑料，PVC,PE,PS,PP文案標(biāo)準(zhǔn)工程塑料：力學(xué)性能、耐磨性、耐腐蝕性、尺寸穩(wěn)定性、有一定的金屬特性;PA、PC、POM、ABS、PSF聚苯醴、聚氯醴增強(qiáng)塑料：玻璃纖維等增強(qiáng)材料，提高了力學(xué)性能，如抗拉強(qiáng)度、抗彎強(qiáng)度、疲勞強(qiáng)度、抗蠕變性、剛度和表面硬度改善了熱性能，如提高了熱變形溫度、降低了線膨脹系數(shù)、提高了熱導(dǎo)系數(shù)、改善了阻燃性降低了吸水性，提高了尺寸穩(wěn)定性，抑制了應(yīng)力開(kāi)裂等但增強(qiáng)制品接縫強(qiáng)度和光澤性降低，增強(qiáng)力學(xué)性能、成型收縮率和線膨脹系數(shù)出現(xiàn)不同程度