What are the precautions for tire rubber during extrusion?

During the extrusion process of tire rubber, the following precautions should be taken to ensure the smooth progress of the extrusion process and the quality of the extruded product:

1、 Rubber preparation and hot refining

The parked rubber material must be fully heat refined before extrusion, usually requiring two rounds of heat refining: coarse refining and fine refining. When rough refining, add the original glue first, and then add the return glue after the glue is pressed together. After mixing evenly, send it for a second round of fine refining.

The temperature and roller spacing of rough and fine refining should be appropriately controlled to ensure the uniformity and plasticity of the rubber material.

The proportion of returned glue must not exceed the specified value, and the surface moisture must be dried before being put into the roller.

2、 Extruder temperature and preheating

The temperature of each section of the extruder should be controlled within an appropriate range, including the temperature of the body, head, mouth shape, and other parts.

Before extrusion, it is necessary to preheat the extruder head, core, and other parts to ensure smooth extrusion of the rubber material.

3、 Extrusion operation and quality control

During the extrusion process, it is necessary to continuously apply adhesive and control the thickness and width of the adhesive strip according to different specifications.

The surface of the extruded rubber strip should be smooth, flat, and free of impurities.

Regular measurement and adjustment of the extruder mouth and core support are required to ensure uniform and consistent specifications and thickness of the tire barrel.

The extruded tire tube needs to be fully cooled to avoid deformation. The surface of the cooled tire tube needs to be dried with compressed air.

4、 Storage and subsequent processing

The extruded tire tube needs to be placed flat on the workbench or louver frame according to specifications to avoid being squeezed and adhered.

The storage temperature should not be too high, and the storage time should not be too long, usually about 24 hours.

The storage area must be kept clean to avoid impurities from entering.

The subsequent processing includes fixed length cutting, joint and other operations, which need to be carried out according to the process requirements.

5、 Safety and environmental protection

During the extrusion process, attention should be paid to operational safety to avoid accidents such as burns and mechanical injuries.

Appropriate environmental measures need to be taken, such as using environmentally friendly isolation agents and reducing dust pollution.

In summary, tire rubber needs to pay attention to multiple aspects during the extrusion process, including material preparation and hot refining, extruder temperature and preheating, extrusion operation and quality control, storage and subsequent processing, as well as safety and environmental protection. The strict adherence and implementation of these precautions are important guarantees for ensuring the smooth progress of tire rubber extrusion process and the quality of extruded products.