Pin-Type & Pin Barrel Cold Feed Extruders For Rubber Sheet And Tyre Tread Industry

The following is a brief introduction to pin-type cold feed extruders, covering their working principle, advantages, applications, and key technologies.

A pin-type cold feed extruder is a specialized piece of equipment primarily used in the rubber processing industry. It continuously plasticizes, mixes, and shapes room-temperature (cold) rubber compounds into finished or semi-finished products (such as profiles, hoses, and tire parts).

Unlike traditional extruders, pin-type cold feed extruders eliminate the need for preheating the rubber in an open mixing mill, significantly simplifying the production line.

2. Working Principle (Pin Barrel Principle)

Cold Feed: Strips or sheets of rubber compound at room temperature are directly fed into the feed hopper.

Pin Intervention: Rows of radial metal pins extend from the inner cylinder wall (cylinder body) and directly enter the helical gap of the rotating screw.

Powerful Shearing and Mixing: As the screw rotates, the fixed pins continuously divide, shear, and reorient the rubber flow. This achieves powerful dispersion and mixing without causing localized overheating.

Technical Specifications

4. Typical Applications

• Automotive: Weatherstrips, door seals, radiator hoses, fuel lines, brake hoses.

• Tire Manufacturing: Tread extrusions, sidewall components, apex strips.

• Industrial Products: Conveyor belt components, rubber sheets, cable jacketing, custom sealing profiles.

5. Key Variations & Features

• Venting / Vacuum Systems (Pin-Type Venting Cold Feed Extruder): Incorporates a vacuum zone along the barrel to pull out air and moisture, producing pore-free, dense rubber profiles.

• Co-extrusion Multiplex Heads: Often configured in duplex, triplex, or quadruplex setups (multiple extruders connected to one die head) for complex multi-compound products like tire treads or co-extruded automotive seals.

Why Choose Our Rubber Machinery?

• Superior Wear Resistance: The screw and sleeve are hard-faced alloy treated, and the screw undergoes a chrome-plating process, resulting in improved wear resistance and extended service life.

  Efficient Mixing: This machine uses a cold-feed method, reducing the need for heating the rubber in the mixing mill. Screw shearing and a TCU precise temperature control system further enhance rubber plasticizing.

  Robust Structural Integrity: The thick-gauge welded frame undergoes stress relief treatment to prevent deformation under high pressure.

  Energy Saving Optimization: A high-efficiency hardened gearbox and variable frequency motor, along with an intelligent drive unit, reduce overall energy consumption.

  Safety Protection: Comprehensive emergency stop devices and overload interlocks protect operators.

  One-Stop Engineering Support: Complete layout design, formulation guidance, and global installation assistance are provided.

Primary Applications

Our heavy-duty rubber manufacturing machinery and production lines are widely used in the global polymer processing and manufacturing industry. Our machines are exported to over 30 countries, including Russia, Turkey, Poland, Chile, Brazil, and Saudi Arabia, primarily for tires and rubber preforms, tire retreading, and our pin cold feeders and calenders are core equipment for high-volume compounding and fabric covering, meeting stringent safety and performance specifications. In the industrial rubber products manufacturing sector, our machinery processes a variety of elastomer products, including conveyor belts, heavy-duty hoses, bridge bearings, and specialized rubber seals. Furthermore, our equipment is widely used in recycling plants to process waste tires into high-purity recycled rubber granules and powders. By combining advanced mechanical engineering with rigorous factory testing, we are able to provide reliable, high-volume production systems that meet the demands of harsh industrial environments worldwide.

Frequently Asked Questions (FAQ)