Rubber hose forming process

The basic rubber hose produce process include rubber mixing processing, cord and canvas processing, rubber hose molding, and vulcanization,etc. For rubber Hoses with different structures and different skeletons, their skeleton layer processing methods and hose forming equipment are different.

Since the all-rubber hose does not contain a skeleton layer, you only need to use an extruder to extrude the hose,cloth-filled rubber hose(steam hose, food grade hose,fuel rubber hose, chemical hose, large diameter hose,etc.) needs to use a molding machine that wraps the rubber cloth on the inner rubber layer, suction hose needs to be wrapped with a metal spiral when forming Backpack inner rubber,knitting and winding hoses(hydraulic hose) need to use special fabric knitting machines or winding machines,knitting hoses need to use knitting machines, etc.

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Hose molding methods are mainly divided into coreless method and cored method (including soft core method and hard core method) mainly based on whether a Tube core is used or not.

Coreless forming

This type of rubber hose is formed without core. The equipment is an extrusion molding machine (commonly used screw extruder), which directly forms the skeleton layer and the outer rubber layer on the extruded inner rubber tube.

The rubber material is stirred, mixed, plasticized and compacted in the barrel with the aid of the extrusion screw, and then moves to the direction of the machine head, and finally a product of a certain shape is extruded from the mouth, and the screw extruder divides the heat to feed the material. There are two types of cold feeding. The former is fed with strips that have been preheated by an open rubber mixing mill, and the latter is fed with rubber that has not undergone hot mixing.

Core forming

Rubber hose has a core forming, which means that rubber hose is formed on a hard core or a soft core. In order to ensure that the hose is under pressure during the vulcanization process, rubber hose is formed with water cloth (a roll of wet cloth with a width of about 10 cm), rope or lead. , And then vulcanized. Industrial hoses and hydraulic hose is use this molding process.

Vulcanization can be directly heated by steam in a vulcanizing tank or continuous vulcanization. The short fiber hose is the short fiber directly added to the rubber material, and then extruded into the molding. Its production process is simple, and it will gradually replace the knitted hose and the cloth hose. Modern hose production technology tends to be highly continuous and automated production. The use of thermoplastic rubber or plastic can eliminate the vulcanization process and simplify the production process.