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The rubber extruder manufacturer below outlines the operating procedures for rubber extruders.

Time：

2022-07-15

When manufacturing rubber hoses, needle-type rubber extruders are typically used as the extrusion molding equipment. In many cases, these extruders are also referred to as hose extruders; they can produce not only rubber hoses but also a wide variety of other products. There are numerous types of rubber hoses, and each requires distinct production processes and equipment. Therefore, it is essential to select the appropriate method based on the specific application and requirements.

The following explains… Rubber extruder Usage plan

Producing rubber hoses using a rubber extruder.

The production of ordinary single‑layer straight rubber hoses is straightforward: it requires only a single rubber extruder to form the hose, which is then cured in a vulcanization oven to yield an EPDM rubber hose. In contrast, manufacturing automotive hoses involves complex equipment and processes. During production, two rubber extruders are used in-line to extrude the inner layer; within the extruder barrel, the rubber is sheared, compressed, and mixed by the screw, and the inner layer is extruded through a straight die. The inner tube is then conveyed by a continuous conveyor to the braiding machine, after which two additional rubber extruders produce the outer layer.

Two extruders equipped with T‑die heads are used: the rubber hose enters the T‑die from one side, where it is co‑extruded with two types of rubber; the composite material is then discharged from the front of the T‑die. After extrusion, the product is quenched in water and cut to the specified length using a fixed‑length cutter. It is then placed on a forming mandrel and vulcanized in a curing tank to produce the desired finished product. Different rubber hoses are manufactured using distinct production processes.

Rubber extruder Usage plan

A carrier-free loose material is prepared via a specialized process, in which granules are blended with rubber raw materials and then pelletized using a rubber extruder, thereby reducing dust emissions during production and improving the working environment, while enhancing mixing uniformity, layering, and overall product quality.

After high‑content materials are compounded in a rubber extruder, they can be directly blended with the base resin and processed via extrusion or injection molding, offering convenient handling but poor dispersion, which fails to meet high‑quality requirements. Alternatively, the components can be mixed directly and then extruded into a modified compound using a twin‑screw rubber extruder—a widely adopted method that is also highly cost‑effective.

Rubber extruder temperature control system

The temperature control system uses a mold temperature controller to maintain the rubber extruder’s operating temperature within a specified range, or to sustain a constant temperature throughout the production process.

Temperature control is achieved by operating multiple units in a coordinated manner. Prior to formal production, rubber extruders are typically preheated using mold temperature controllers. As the temperature rises to a specified set point, the heated material enters the extruder’s feed system. Once inside, the heat enhances the rubber’s flowability within the screw barrel, and through the screw’s action, the extruder generates additional heat, causing the temperature to continue rising.

The higher the temperature, the more it rises; once the setpoint is reached, the temperature signal is transmitted via a sensor to the intelligent temperature-control cabinet, which then initiates cooling.

That’s all for today—thanks for watching, and see you next time!