Model XJ-75 XJ-90 XJ-120 Screw Diameter (mm) 75 90 120 Length-to-Diameter Ratio 14:1 14:1 14:1 Motor Power (kW) 37 55 110 Screw Speed (rpm) 55 50 45 Production Capacity (kg/h) 80–120 100–300 300–600 Rubber hoses have a wide range of applications. Fabric-reinforced rubber hoses offer high strength and excellent flexibility, making them suitable for use as flexible pipelines for water supply, oil transport, gas delivery, and chemical processing. Hebei Shuangda Rubber & Plastic Machinery Co., Ltd. manufactures pin-type cold-feed rubber extruders that incorporate advanced technologies from British rubber machinery. These machines feature rapid heating and cooling, an advanced temperature control system, and are equipped with specialized pin-type barrel screws, enhancing material plasticization and mixing performance. When paired with hose dies, water tanks, traction units, winding systems, or cutting devices, they can produce single-layer or double-layer hoses, braided hoses, and more. The entire production line delivers stable performance and high control accuracy. Workflow of the Rubber Hose Extrusion Line 1. Rubber is processed through internal and open mixing. During this stage, raw rubber and additives are thoroughly blended, resulting in improved stability and aesthetic quality of the final hose product. 2. Extrusion by the rubber extruder. The rubber sheet produced during open mixing is formed into strip-shaped rubber strips. These strips are then fed into the rubber extruder to form the inner tube of the hose, ensuring precise dimensions. 3. Traction—serves to convey and transport the hose. 4. Braiding—after being pulled by the traction unit, the inner hose passes through a braiding machine. The braided hose is then conveyed to the next process step, where the braid density can be adjusted according to the pressure requirements of the hose. 5. Traction—this step is similar to Step 3. 6. Extrusion of the outer hose layer. Similar to Step 1, the braided inner hose enters the rubber extruder via a T-shaped die head. The finished hose blank emerges from the opposite side of the T-die. 7. Traction and automatic cutting—finished hose blanks are automatically cut to predetermined lengths. 8. Core insertion—insertion and shaping of the core. 9. High-pressure vulcanization—hoses fitted with cores are placed into a high-pressure vulcanizing tank for curing. 10. Product removal and core extraction. 11. Finished product output.

Model Length-to-Diameter Ratio Motor Power (kW) Specifications (mm) Production Capacity (kg/h) SJ-45 30:1 7.5 12–40 20 SJ-65 30:1 11 40–200 80 Applications This production line is a specialized unit for manufacturing spiral-reinforced flexible hoses, comprising two extruders, a forming machine, and a cooling tank. The hose wall features both soft and rigid spiral layers to enhance pressure resistance. These hoses exhibit excellent properties such as crush resistance, corrosion resistance, negative-pressure tolerance, bend resistance, and superior flow characteristics, making them suitable for conveying gases, liquids, and granular materials. They are widely used in industries, agriculture, construction, and water‑irrigation applications. Spiral Jacket A spiral jacket is an external protective sleeve made from polypropylene or nylon through a special manufacturing process. Typically shaped in a spiral form, it is also referred to as a spiral rubber hose protector. Spiral jackets are ideal for hydraulic hoses, providing effective protection for the internal components. In addition to enhancing aesthetics and improving restraint, they can extend the service life of the internal components by more than three years. PE carbon‑reinforced spiral‑enhanced pipes have seen rapid development in recent years and currently represent one of the best solutions for protecting power cables. Their material boasts outstanding chemical properties, including excellent insulation and voltage resistance, high toughness and corrosion resistance, and long-term durability against acid and alkali exposure, resulting in extended pipe lifespan. * Controlled by PIC or temperature control instruments. * High extrusion output with low melt temperature. * Specially designed screws ensure high efficiency and productivity. * Helical gear design featuring high hardness and low noise delivers reliable performance and long service life. * Standard DC speed control; variable-frequency drive and electromagnetic speed control options available. * Extruders can be easily swapped out to accommodate different materials.

Applications: The three-layer composite rubber sealing strip is primarily composed of a foam‑and‑solid EPDM rubber structure, with an internal metal clamp made of steel wire or steel sheet. It is mainly used on car door panels and frames, side windows, front and rear windshields, engine hoods, and trunk lids, providing functions such as waterproofing, dustproofing, sound insulation, thermal insulation, shock absorption, and decorative enhancement. Equipment Features: - Uniform vulcanization, fast curing speed, and high efficiency; - Improved product quality, reduced production costs, optimized working conditions, and environmental protection with energy savings. The rubber three‑layer composite extrusion line is mainly used to produce: steel‑core rubber sealing strips, steel‑belt shaped rubber profiles, steel‑belt reinforced rubber strips, automotive steel‑belt composite sealing strips, and foam‑plus‑solid‑plus‑steel‑belt rubber sealing strips. Applications of Composite Extruders Why use a composite extruder? Because different parts of a tire require distinct mechanical properties—such as wear resistance for the tread, flexural durability for the sidewall, and low heat buildup in certain areas—each section must be manufactured using compounds with tailored formulations. A composite extruder enables the internal co‑extrusion of these differently formulated rubber compounds, producing composite components.

Model SJ-45 SJ-65 SJ-80 SJ-90 SJ-120 Screw Diameter (mm) 45 65 80 90 120 L/D Ratio 25:1 25/28:1 25/28:1 25/28:1 25:1 Motor Power (kW) 7.5 11–15 15–18.5 18.5–22 45 Screw Speed (r/min) 30–100 30–100 30–100 30–100 30–100 Output (kg/h) 15–25 30–70 50–100 80–180 200–350 Applications: This production line is designed for manufacturing plastic pipes and profiled extrusions of various specifications, primarily producing pipes with diverse diameters and wall thicknesses used in agricultural irrigation and drainage, building water supply and drainage, and cable laying applications. It is suitable for producing pipes made from materials such as PP, PE, PS, ABS, PVC, PPC, and other resins. Specialized barrel and screw designs ensure efficient extrusion and excellent plasticization performance. Analysis of Plastic Pipe Production Lines: As an important component of chemical building materials, plastic pipes are widely favored by users due to their superior properties—hygienic, environmentally friendly, and energy-efficient. The main types include UPVC drainage pipes, UPVC water supply pipes, aluminum-plastic composite pipes, and polyethylene (PE) water supply pipes. A typical pipe production line consists of a control system, extruders, die heads, a sizing and cooling system, a haul-off unit, a planetary cutting device, and a material-receiving rack. Each production line typically includes two extruders: the primary extruder features a high‑capacity conveying sleeve and an efficient screw design, while the secondary smaller extruder is used to produce marking lines. When a plastic pipe production line malfunctions, it can result in surface roughness, internal vibration rings, or lack of vacuum—issues that directly affect product quality. Therefore, timely troubleshooting and maintenance of the production line are essential to ensure consistent product quality.