News

Trade news

Company news

FAQ

A brief introduction to silicone extruders manufactured by Hebei Shuangda.

Time：

2017-03-22

It is suitable for the efficient extrusion and continuous, rapid vulcanization of various silicone‑based profiles, including silicone tubes and strips. This silicone extrusion–vulcanization production line incorporates numerous innovative design features, with the successful application of a roller‑type automatic feeding system that significantly enhances production stability while greatly reducing reliance on manual labor. The high compression ratio and high length‑to‑diameter ratio of the screw ensure excellent extrusion density and mixing performance, yielding products with smooth inner and outer surfaces, free of bubbles, and consistent dimensional stability. Moreover, the separate structure of the screw and drive housing provides outstanding self‑cleaning capabilities. When producing compounds of different colors or platinum‑cured formulations, this setup proves particularly advantageous.

It is suitable for the efficient extrusion and continuous, rapid vulcanization of various silicone‑based profiles, including silicone tubes and strips. This silicone extrusion–vulcanization production line incorporates numerous innovative design features, with the successful application of a roller‑type automatic feeding system that significantly enhances process stability while greatly reducing reliance on manual labor. The high compression ratio and high length‑to‑diameter ratio of the screw ensure excellent extrudate density and superior mixing performance, yielding products with smooth inner and outer surfaces, no bubbles, and consistent dimensional stability. Moreover, the separate structure of the screw and drive housing provides outstanding self‑cleaning capabilities, making this line particularly advantageous when producing compounds in different colors or formulations containing platinum‑catalyzed vulcanizing agents.

The energy‑saving, high‑efficiency hot‑air calcination tunnel is constructed entirely of stainless steel. Its inner chamber features a floating‑type structure and is insulated with aluminosilicate material capable of withstanding temperatures up to 1,200°C, delivering excellent thermal insulation and heat retention. Even when the internal temperature reaches 600°C, the external surface remains at approximately 40°C. The heating elements are multi‑tube designs, achieving a thermal efficiency of up to 96% and generating both high‑temperature and radiant heat, which reduces calcination time by more than 50% compared with conventional methods. Control is implemented via SSR drive and a PID‑based pulse‑width modulation strategy, ensuring precise temperature regulation and extending the service life of the heating units. The tunnel is configured in two sections—shaping and forming—with maximum temperatures of 700°C and 550°C, respectively. This design enhances production efficiency, enabling the extrusion of thin‑walled and large‑diameter tubes with superior roundness and minimizing surface indentations. The production line’s conveyor belt is a fully imported steel belt, resistant to adhesive buildup and highly durable, equipped with gravity‑type tension rollers to maintain consistent conveyance throughout operation. All speed controllers on the line utilize closed‑loop current‑vector inverters; the software developed specifically for extrusion is characterized by its proven experience, maturity, intelligence, and stability—key strengths of this control system.