Silicone tube extrusion equipment

There are many types of rubber hoses, each with its own suitable manufacturing process. Take silicone hose production, for example: the choice of extruder depends on the specific type of hose. For instance, producing a single‑layer silicone hose requires a dedicated silicone rubber extruder as the molding equipment. Because silicone rubber is soft and easy to shape, the first vulcanization step must carefully avoid surface scratches. After selecting an extruder model appropriate to the hose’s size, the material is extruded vertically from top to bottom under gravity. We design the vulcanization setup as a vertical oven; typically, a high‑stability vertical section holds the hose in shape while a horizontal vulcanization chamber applies heat to complete the curing process. If the product is small, a vertical vulcanization chamber can be used directly to finish curing the extruded hose. Some silicone hoses feature an internal layer or are made by combining two different colors of silicone. In such cases, a composite die connects two extruders to perform co‑extrusion, yielding multi‑color hoses. For hoses with an intermediate layer, two extruders are also required, but they operate in tandem: one extrudes the inner layer, which is then conveyed via a take‑up unit to the interlayer processing station—whether it involves woven fabric or steel wire reinforcement. The layered assembly is subsequently extruded with a T‑die on the second extruder to form the outer layer, completing the hose’s structure. However, this type of hose cannot be cured using conventional pressure‑free vulcanization chambers; instead, we employ a pressurized vulcanization tank. In summary, there are numerous types of rubber hoses, and it is essential to select the manufacturing process best suited to each product.

Purpose

It is suitable for the efficient extrusion of various silicone‑based profiles, including silicone tubes. The design of the silicone extruder and its feeding system have been successfully implemented, enhancing production stability and reducing the workload on operators. A screw with a high compression ratio and a high length‑to‑diameter ratio ensures excellent extrudate density and mixing performance, resulting in products with smooth inner and outer surfaces, no bubbles, and consistent dimensional stability.

Performance Characteristics of Silicone Tube Extruders

1. This machine is equipped with an AC motor and features variable-frequency speed control, offering a wide speed range, excellent adaptability to the production of silicone rubber products in various specifications, and convenient operation.

2. This machine is equipped with a hardened‑tooth‑surface rubber extruder reducer, which features low noise, high transmission torque, smooth operation, and convenient maintenance.

3. This machine employs pneumatic cylinder‑driven forced feeding, enabling the processing of multi‑layer rubber strips with dense extrusion and excellent product quality.

4. This machine is equipped with a dual-channel automatic temperature controller, ensuring minimal temperature fluctuations during heating. It allows for optimal selection of the heating temperature based on different processing requirements and automatically maintains the set temperatures of the heated barrel and die head.

5. This machine employs electric heating for the barrel and a circulating cooling system, enabling rapid cooling of the material to prevent thermal degradation.

Hebei Shuangda Rubber & Plastics Machinery Co., Ltd. is a modern enterprise integrating research and development, manufacturing, and sales of complete sets of extrusion equipment for rubber, silicone, and plastics. The company’s main products include rubber extruders, rubber hose extrusion lines, three‑layer composite sealing strip extrusion lines, silicone sealing strip production lines, plastic sealing strip production lines, plastic profile production lines, plastic pipe production lines, elastomer extruders, and other extrusion equipment, as well as production machinery for engineering seals, automotive seals, wire and cable applications, air‑conditioning hoses, braided hoses, automotive hoses, waterstop strips, and related products.