Rubber extruder The manufacturer has outlined the operating, maintenance, and servicing procedures for rubber extruders.

The operation of a rubber extruder encompasses a series of stages, including machine installation, adjustment, trial running, operation, maintenance, and repair. Its applications share commonalities with those of general-purpose machinery, particularly in the drive motor and reduction gear system; however, the extrusion system—the core working component—of a screw-type rubber extruder is distinctive. When using such an extruder, special attention should be paid to its unique characteristics.

Rubber extruder Manufacturer: Operating Procedures for Rubber Extruders

Operators must be thoroughly familiar with the structural features of the rubber extruder they are operating, particularly the screw design, the characteristics of the heating and cooling control instruments, and the die configuration and assembly. This knowledge enables them to accurately set the extrusion process parameters and operate the machine correctly.

The operating procedures for extruding different rubber products vary, but they also share certain similarities.

(1) For rubber used in extrusion molding, the raw materials must meet the required drying specifications; if necessary, additional drying is required, and the materials should be screened to remove agglomerates and mechanical impurities.

(2) Inspect the equipment’s water, electrical, and gas systems to ensure they are functioning properly; verify that water and gas lines are unobstructed and free of leaks, that the electrical system is operating normally, and that the heating system, temperature control, and all instruments are reliable. Conduct a low-speed idling test of auxiliary machinery to confirm normal operation. Start the vacuum pump on the control panel and check that it is working correctly. Lubricate all lubrication points of the equipment and promptly address any malfunctions.

(3) Install the die head and set the sleeve; select the appropriate die head specification based on the product type and dimensions, and install the die head in the following sequence.

(4) The die head shall be assembled as a single unit and installed on the rubber extruder as an integral assembly.

(5) Before assembling the head, wipe off any grease applied during storage, carefully inspect the cavity surface for dents, scratches, or rust spots, perform necessary polishing, and then apply a thin layer of silicone oil to the rotor surface.

(6) Assemble the head‑end plates in the prescribed sequence, apply high‑temperature grease to the bolt threads, and then tighten the bolts and flanges.

(7) Place the porous plate between the flanges of the die head, ensuring that the plate is securely clamped and no material overflows.

(8) When tightening the mold and Rubber extruder Before tightening the connecting flange bolts, the mold’s horizontal position should be adjusted: for square molds, horizontal alignment can be fine-tuned; for round molds, the horizontal level is set by ensuring the rubber base of the forming die is flush with the mold base.

(9) Tighten the flange bolts, tighten the head‑mounting bolts, and install the heating ring and thermocouple, ensuring that the heating ring is tightly fitted against the outer surface of the machine head.

(10) Install the adjustment sleeve and adjust it to the correct position. Verify that the main unit and the adjustment sleeve are aligned with the tractor’s centerline. After adjustment, tighten the securing bolts. Connect all water and vacuum lines to the forming sleeve, then switch on the heating power supply to evenly heat the die head and die cover. Simultaneously, open the cooling‑water inlet valves at the hopper and at the bottom of the gearbox, as well as the inlet valve for the exhaust vacuum pump. During heating, set each temperature zone to 140°C; once the temperature reaches 140°C, maintain this temperature for 30–40 minutes, then raise the temperature to the normal production setting.

That’s all for today’s explanation. Thank you for watching.