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时间:2019-09-16
《水口设定-流道长度大小确定》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、图6-4材料的流道直径图,其中,G=塑件重量(g);S=塑件厚度(mm);D’=参考直径(mm)图6-5流道长度与长度系数对于流动直径的影响最初估算的流道直径为:其中, D=流道直径(mm); W=塑件重量(g);L=流道长度(mm)。一般无法填充料之塑料的典型流道尺寸列于表6-1。表6-1无填充料之塑料的典型流道尺寸材料直径材料直径mminchmminchABS,SAN5.0-10.03/16-3/8Polycarbonate聚碳酸脂(PC)5.0-10.03/16-3/8Acetal聚缩醛树脂3.0-10.01/8-3/8Thermoplasticpolyester热塑性聚脂树
2、脂3.0-8.01/8-5/16Acetate5.0-110.3/16-7/19Thermoplasticpolyester(reinforced)补强热塑性聚脂树脂5.0-10.03/16-3/8Acrylic压克力8.0-10.05/16-3/8Polyethylene聚乙烯2.0-10.01/16-3/8Butyrate5.0-10.03/16-3/8Polyamide聚丙烯酸脂5.0-10.03/16-3/8Fluorocarbon聚氟碳树脂5.0-10.03/16-3/8Polyphenyleneoxide6.0-10.01/4-3/8Impactacrylic耐冲击压克力8
3、.0-10.05/16-1/2Polyphenylene聚丙烯5.0-10.03/16-3/8Ionomers2.0-10.03/32-3/8Polystyrene聚苯乙烯3.0-10.01/8-3/8Nylon耐隆2.0-10.01/16-3/8Polysulfone聚氟乙烯6.0-10.01/4-3/8Phenylene6.0-10.01/4-3/8Polyvinyl(plasticized)聚氯乙烯3.0-10.01/8-3/8Phenylenesulfide6.0-10.01/4-1/2PVCRigid硬质聚氯乙烯6.0-16.01/4-5/8Polyallomer异聚合物5.
4、0-10.03/16-3/8Polyurethane聚尿素树脂6.0-8.01/4-5/16每当流道有分支,其分支流道的直径应该要小于主流道的直径,因为只有较少量的熔胶会流进分支。而且,从经济观点而言,应减少流道内的的熔胶量,以减少废料。当主流分流到N个分支流道时,主流道直径(dmain)和分支流道直径(dbranch)的关系为:dmain=dbranch×N1/3表A-1常用树脂的建议熔胶温度与模具温度材料流动性质(°C/°F)熔胶温度(°C/°F)模具温度(°C/°F)顶出温度(°C/°F)名称MFRg/10min测试负荷kg测试温度C最小值建议值最大值最小值建议值最大值建议值AB
5、S3510220200/392230/446280/53625/7750/12280/17688/190PA12955275230/446255/491300/57230/8680/176110/230135/275PA61105275230/446255/491300/57270/15885/185110/230133/271PA661005275260/500280/536320/60870/15880/176110/230158/316PBT352.16250220/428250/482280/53615/6060/14080/176125/257PC201.2300260/50
6、0305/581340/64470/15895/203120/248127/261PC/ABS125240230/446265/509300/57250/12275/167100/212117/243PC/PBT465275250/482265/509280/53640/10460/14085/185125/257PE-HD152.16190180/356220/428280/53620/6840/10495/203100/212PE-LD102.16190180/356220/428280/53620/6840/10470/15880/176PEI155.00340340/64440
7、0/752440/82470/158140/284175/347191/376PET275290265/509270/518290/55480/176100/212120/248150/302PETG235260220/428255/491290/55410/5015/6030/8659/137PMMA103.8230240/464250/482280/53635/9060/14080/17685/185POM202.16190180/3562
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