胶管成型工艺
胶管生产的基本工序为混炼胶加工、帘布及帆布加工、胶管成型、硫化等。不同结构及不同骨架的胶管,其骨架层的加工方法及胶管成型设备各异。
The basic process of rubber hose production is mixing rubber processing, cord and canvas processing, rubber tube forming, vulcanization and so on. Different structure and different skeleton of the hose, its skeleton layer processing methods and hose molding equipment are different.
全胶胶管因不含骨架层,只需使用压出机压出胶管即可;夹布胶管需要使用将胶布包在内胶层上的成型机;抽吸胶管在成型时需先缠金属螺旋线后包内胶;编织及缠绕胶管需要使用专用的织物编织机或缠绕机;针织胶管需要使用针织机等。
All rubber hose without skeleton layer, just use extruder to extrude rubber hose; clip rubber hose need to use the molding machine to wrap rubber cloth on the inner rubber layer; suction rubber hose need to wrap metal spiral before wrapping glue; knitting and winding rubber hose need to use special fabric knitting machine or winding machine; knitting rubber hose need to make Use knitting machines, etc.
胶管成型方法主要以是否采用管芯,分为无芯法、和有芯法(又包括软芯法和硬芯法)。
The forming method of rubber hose is mainly divided into non-core method and core method (including soft core method and hard core method).
无芯成型
Coreless molding
胶管无芯成型,设备是挤压成型机(常用螺杆挤出机),将骨架层及外胶层直接在压出的内胶管上成型。
Coreless tube molding, equipment is extrusion molding machine (commonly used screw extruder), the skeleton layer and the outer glue layer directly in the extrusion of the inner tube molding.
胶料借助挤出螺杆的放置作用在机筒内搅拌、混合、塑化和压紧,然后向机头方向移动,最后从口型挤出的一定形状的产品,螺杆挤出机分热喂料和冷喂料两种,前者喂入经过开放式炼胶机预热的条料,后者喂入不经过热炼的胶料。
The rubber material is stirred, mixed, plasticized and pressed in the barrel by the placement of the extrusion screw, and then moves toward the nose. Finally, the product with a certain shape is extruded from the die. The screw extruder divides the heat feed into the cold feed. The former feeds the strip preheated by the open glue refiner, and the latter feeds the strip which is not heated. Glue.
有芯成型
Core forming
胶管有芯成型,是指胶管在硬芯或软芯上成型,为了保证胶管在硫化过程中处于受压状态,胶管在成型后包水布(宽10cm左右的浸水湿布卷)、绳或包铅,然后再硫化。
Core forming of rubber hose refers to the formation of rubber hose on hard core or soft core. In order to ensure that the rubber hose is under pressure during vulcanization, the rubber hose is packed with water cloth (about 10 cm wide wet cloth roll), rope or lead, and then vulcanized.
硫化可采用硫化罐直接蒸汽加热或连续硫化。短纤维胶管是将短纤维直接加入胶料中,然后压出成型,其生产工艺简单,它将逐步取代针织胶管和夹布胶管。现代胶管生产工艺趋向于高度连续化和自动化生产。采用热塑性橡胶或塑料可省去硫化工序,大大简化生产工艺过程。
Vulcanization can be done by direct steam heating or continuous vulcanization. Short fiber hose is short fiber directly into the rubber, and then extrusion molding, its production process is simple, it will gradually replace the knitted hose and cloth hose. Modern rubber hose production processes tend to be highly continuous and automated. Thermoplastic rubber or plastic can be used to save the vulcanization process and simplify the production process.