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简介
   将加热塑化的热塑性塑料通过一系列加热的压辊,使其连续成型为薄膜或片材的一种成型方法。在橡胶加工过程中,可把胶料压延成一定厚度和宽度的胶片,或在胶片上压出花纹,供下一步制品成型用。压延法也用于使织物和钢丝帘线挂胶,使胶片与胶片、胶片与挂胶织物贴合等。因此,是橡胶加工的主要工艺之一。在塑料加工中,压延法主要用于加工聚氯乙烯薄膜、片材,与织物复合制人造革、地板革、防水卷材等。
 
压延机
   常以辊筒数目及排列方式分类。辊筒数目有双辊、三辊、四辊。三 辊压延机主要用于生产片材(见彩图)。四辊可生产较薄制品,还可完成双面贴胶的操作,目前采用较为广泛。辊筒排列方式很多(图1),以倒L型和Z型用得较 多,各辊间隙均可调整。压延机的规格用辊筒外径和辊筒的工作部分长度表示。辊筒可通入蒸汽或过热水加热。通常压延机还必须和其他辅助设备组合成一条生产线 (图2)才能进行生产。辅机包括上料装置(如双辊机或挤出机)、金属检测器、引离辊、冷却装置、测厚仪、卷绕装置、切割装置等。如要求与织物复合(如贴 胶),则还要有烘布装置、预热辊、贴合装置等。
 
制品压延工艺

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MUQIANWOMENYAYANCHANGYOULIANGTAIKENILENGYAJI,LIANGTAITUIHUOLU,LIANGTAIMOCHUANGDENGSHEBEI。KENILENGYAJIJIAGONGDEHOUDUFANWEIZAI0.1mm-1.2mmZHIJIAN,YINGDUFANWEIZAI1/4H—HZHIJIAN,HOUDUGONGCHAZAI0.01mm—0.05mmZHIJIAN,GANGDAIKUANDUZAI150mm-350mmZHIJIAN,SHENGCHANNENGLIYIMEITAIJISUANDAGAIWEI400KG/H。

TUIHUOLUKESHENGCHANDEHOUDUFANWEIZAI0.10mm—1.0mmZHIJIAN,TUIHUOSUDUZAI1.0——12MIZHIJIAN,TUIHUOHOUCAILIAODEYINGDUWEI304HV160——190DU,301HV190——210DU,TUIHUOGANGDAIDEKUANDUZAI80-400MMZHIJIAN,SHENGCHANNENGLIYIMEITAIJISUANDAGAIWEI200KG/H。

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