Rubber extruder Since its introduction in 1870, after more than a century of development, it has undergone three major stages: hot-feed extruders, cold-feed extruders, and pin‑type cold-feed extruders.

When using a hot-feed extruder, the rubber must be heated to the required temperature and plasticity prior to extrusion molding. Thanks to its advantages—continuous extrusion, simple operation, high production efficiency, and stable product geometry—the hot-feed extruder remains widely employed in the manufacturing of numerous products today.

The cold-feed extruder is a new type of extruder that emerged in the 1960s and began to be widely adopted in the 1970s. Its introduction has streamlined production and processing, eliminating the need for thermal refining of the feedstock.

The compounded rubber compound is fed into the extruder at room temperature, yielding rubber blanks of various shapes. In production using a cold-feed extruder, the rubber material passes through the feed zone, where its temperature rises, before entering the plasticization zone. In this zone, the screw typically features a master–auxiliary thread configuration, ensuring thorough plasticization and uniform mixing of the compound prior to its passage into the extrusion zone. Depending on the specific product requirements, the extrusion zone applies a controlled pressure to the compound, which is then forced through the die to produce rubber blanks in diverse cross-sectional shapes.

Rubber extruder Having undergone three stages of development, the modern pin‑type cold‑feed extruder not only significantly enhances extrusion performance but, thanks to its excellent plasticizing capabilities, low discharge temperature, and high output, has found widespread application in the rubber industry.

Development Prospects of Rubber Extruders

Rubber extruder It is a key piece of equipment in the rubber industry. With advances in rubber‑production technology, extrusion techniques and rubber extruders have also evolved rapidly. In the manufacturing process, rubber extruders have progressed from initial shaping extrusion to now replacing open mills for supplying rubber compounds and enabling the co‑extrusion of various rubber components. Moreover, in recent years, extrusion equipment designed specifically for producing thin films—rather than relying on calendering—has reached maturity. Clearly, rubber extruders have experienced rapid development in recent years. Domesticating advanced equipment facilitates the adoption of new machinery and technologies, elevates enterprises’ equipment standards, and boosts production growth. In particular, driven by the swift expansion of radial tire manufacturing in China and the advantages of screw‑type cold‑feed extruders, these machines enjoy significant momentum in widespread application. They have emerged as the successor to hot‑feed extruders and conventional cold‑feed extruders, opening up broad prospects for their further development and deployment.

Hebei Shuangda Rubber and Plastics Machinery Co., Ltd. primarily manufactures the following equipment: rubber composite extrusion lines and hose extrusion lines, which are widely used in the rubber industry for extruding oil‑resistant hoses, heating‑air ducts, wire‑reinforced hoses, inner tubes, and other rubber products; silicone extrusion lines, suitable for producing silicone tubes, composite silicone tubes, silicone strips, and various other silicone‑based products; butyl rubber extrusion lines, whose output is mainly employed for waterproofing and thermal insulation in crack‑seal applications and large‑scale construction projects; and PVC plastic sealing strip production lines, capable of manufacturing PVC sealing products in a wide range of specifications and dimensions.