Working principle of a cold-feed rubber extruder
Time：
2017-03-27
Working principle of a cold-feed rubber extruder: The rubber compound does not require hot mixing; it is fed into the extruder at ambient temperature, yielding extrudates of various shapes. In the production process using a cold-feed extruder, the compound first passes through the feed zone, where its temperature rises, before entering the plasticization zone. In this zone, the screw typically features a master–slave thread configuration, ensuring thorough plasticization and compounding. The compound then moves to the extrusion zone, where, depending on the product’s requirements, it is subjected to a specific pressure. Finally, it exits through the die and die land, producing extrudates in a wide range of shapes. The application of cold-feed rubber extruders in China’s rubber industry.
Working principle of a cold-feed rubber extruder:
Cold‑feed rubber compounds do not require hot mixing; the compound is fed into the extruder at ambient temperature, yielding green parts of various shapes. In a production process employing a cold‑feed extruder, the compound first passes through the feed zone, where its temperature rises, before entering the plasticization zone. In this zone, the screw design typically incorporates a primary–secondary thread configuration, ensuring thorough plasticization and compounding. The compound then proceeds to the extrusion zone, where, depending on the specific requirements of the final product, it is subjected to a controlled pressure. Finally, it exits through the die and die land, forming green parts in a wide array of shapes.
Application of cold-feed rubber extruders in China’s rubber industry. In the production of radial tires, annular grooves are machined into the helical sections corresponding to the tread extrusion, composite tread extrusion, bead compound, and various profile compounds. Pins are directly inserted into these annular grooves; under the action of these pins, the rubber compound undergoes lateral movement, flow, and rotational motion. The combined effect of these three types of motion effectively disrupts the core that forms during the extrusion process. Each time this core passes over a pin, it experiences shear; with each revolution of the screw, the compound is repeatedly divided and sheared by multiple pins, enhancing kneading and accelerating its flow within the screw’s flight grooves. As a result, high‑quality mixing, kneading, and plasticization of the rubber compound can be achieved.
Related news
Shuangda
Hebei Shuangda Rubber Machinery Co., Ltd.
Tel：400-0319-386
Landline：+86-319-6017632
Email：shuangdaxiangsu@126.com
Official website：www.shuangdajx.com
Addr：Liyuantun Industrial Zone, Weixian County, Xingtai City, Hebei Province
Copyright © 2022 Hebei Shuangda Rubber Machinery Co., Ltd.