塑料件尺寸公差及性能

1、标准塑料件尺寸公差1. 范围本标准规定了注射、压制、挤塑等成型的热塑性和热固性塑料（不包括二次加工和发泡成型的塑料件）尺寸公差、偏差、公差等级的选用、测量条件和测量方法。本标准主要适用于电子产品用塑料件尺寸公差，其他产品用塑料件尺寸公差，亦可参照米用。2. 引用标准下列标准所包含的条文，通过在标准中引用而构成本标准的条文。在标准出版时，所示版本均为有效。所有标准都会被修订，使用标准的各方应探讨使用下列标准最新版本的可能性。GB1800-79公差与配合总论标准公差与基本偏差GB3177-82光滑工件尺寸的检验GJB4458.5-84机械制图尺寸公差与配合注法3. 定义3.1 基本尺寸basics

2、ize设计给定的尺寸。3.2 实际尺寸actralsize通过测量所得的尺寸。3.3 尺寸公差dimensionaltolerance允许尺寸的变动量。3.4 尺寸偏差dimensionaldeviation某一尺寸减去基本尺寸所得的代数差。3.5 塑料收缩率plasticshringkage塑料件尺寸与相应模具尺寸之差的绝对值与相应模具尺寸之比。3.6 径向收缩率radialshringkage指料流方向的塑料收缩率。3.7 切向收缩率tangentialshringkage指垂直于料流方向的塑料收缩率。3.8 收缩特性值contractionchararcteristicvalue表示料流

3、方向和垂直于料流方向的塑料综合收缩能力，以2倍径向减去切向收缩的绝对值之差表示。3.9 受模具活动部分影响的尺寸sizeeffectedmovablepartsofmould由模具活动零件决定的塑料件尺寸。4公差及偏差规定4.1 尺寸公差、偏关的规定基本尺寸范围为3至600mm。基本尺寸分段3至120mm。采用不均匀递增数列：1401600mm,采用R20优先数系。4.2 公差等级及数值公差等级分为10级，每一级公差数值按表1规定。4. 3偏差的规定本标准只规定公差，而基本尺寸的上下偏差，可按需要分配。例如：60mm的6级公差为0.32mm,其上下偏差可分配为：+0.300+0.20+0.42

4、+0.16600mm,60.032mm,60.012mm,60+012mm,60.016mm4 .4受模具活动部分影响的尺寸公差受模具活动部分影响的尺寸公差，为本标准规定的公差值与附加值之和。1、2级附加值为0.02mm：3、4级附加值为0.04mm：5至7级附加值为0.1mm：8、10级附加值为0.2mm：文案标准5 未注公差尺寸未注公差，按表1规定的710级公差选用公差等级的选用公差等级的选用，按表2规定。基本尺寸公差等级12345678910公差数值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：表中公差值用于基准孔或非基准孔时取（+）号；用于基准轴或非配合轴取（-）值,用于非配合长度取半值冠以正负（士）号文案标准材料相应的公差等级收缩特性值代号名称高精度一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%玻璃纤维增强塑料HIPS局冲击强度聚苯乙烯MF氨基塑料PBTP聚对苯酸丁二酯PC聚碳酸酯PETP聚对苯酸丁二酯PF酚醛

10、塑料PMMA聚甲基丙烯酸甲酯PPE聚苯硫醴（增强）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（软）注：1、其他材料，可按加工尺寸的稳定性，参照表2选取公差等级。2、1、2级为精密级，只有在特殊条件下才采用。3、当沿脱模方向两端尺寸均在要求时，应考虑脱模斜度对公差的影响。4、其他增强塑料的收缩特性性值，应比表2中规定的小，或由试验结果定。6 测量方法6. 1公差测量条件a.标准测量温度为20±2C；b

11、.相对湿度为（65±5）%c.待塑料件成型后24h及“后处理”后进行测量7. 2公差的测量方法公差的测量方法和量具，按GB3177勺规定。8. 公差的注法公差的注法，按GB4458.5的规定。文案标准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文案标准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文案标准MOULDSHRINKAGEANDCOEFFICIENTSOFLINEAREXPANSION文案标准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：价格低、产量大、用途广；酚醛塑料PF,氨基塑料，PVC,PE,PS,PP文案标准工程塑料：力学性能、耐磨性、耐腐蚀性、尺寸稳定性、有一定的金属特性;PA、PC、POM、ABS、PSF聚苯醴、聚氯醴增强塑料：玻璃纤维等增强材料，提高了力学性能，如抗拉强度、抗弯强度、疲劳强度、抗蠕变性、刚度和表面硬度改善了热性能，如提高了热变形温度、降低了线膨胀系数、提高了热导系数、改善了阻燃性降低了吸水性，提高了尺寸稳定性，抑制了应力开裂等但增强制品接缝强度和光泽性降低，增强力学性能、成型收缩率和线膨胀系数出现不同程度