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Overview of the Rubber Hose Extrusion Production Process

Time：

2021-05-24

Taking EPDM rubber hoses as an example, let’s examine the production process and the equipment involved. Rubber hoses are generally categorized into two types: those with a wire reinforcement layer and those without. The size of the extruder is determined based on the hose’s diameter and wall thickness. Typically, pin‑type rubber extruders are used for producing rubber hoses because they ensure uniform mixing, increase pressure within the screw, and thereby improve product quality. The overall equipment required for manufacturing rubber hoses includes two rubber extruders—one for the inner layer and one for the outer layer. First, the inner layer is extruded: after the rubber has been milled and mixed in a kneader, the rubber compound, cut into sheets, is fed into the first extruder. The rubber is forced through the extrusion barrel to the die head, where it takes its final shape. The extruded hose then moves along a conveyor belt to the knitting machine, which forms the reinforcing mesh. Once knitted, the hose enters the T‑die of the second extruder, where the outer coating is applied, completing the basic structure of the rubber hose. The finished hose is drawn by the first traction unit into a water tank for cooling, then passes through a second water tank containing a release agent. After further traction, it proceeds to the automatic cutting equipment. Hebei Shuangda Rubber & Plastics Machinery Co., Ltd. is a modern enterprise integrating research and development, manufacturing, and sales of complete sets of extrusion machinery 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. Additionally, the company manufactures production equipment for engineering seals, automotive seals, wire and cable applications, air‑conditioning hoses, braided hoses, automotive hoses, waterstop strips, and related products.

Taking EPDM rubber hoses as an example, here’s an overview of the production process and the equipment involved. Rubber hoses are generally classified into two types: those with a wire‑reinforced core and those without. The size of the extruder is selected based on the hose’s diameter and wall thickness. Typically, pin‑type rubber extruders are used for producing rubber hoses, as they ensure uniform mixing, increase pressure within the screw, and thereby enhance product quality.

The rubber‑tube production line comprises two extruders: one produces the inner layer, and the other forms the outer layer. The process begins with extrusion of the inner tube: after open‑mill and closed‑mill compounding, the rubber is cut into sheets and fed into the first extruder, where it is forced through the extrusion barrel to the die and shaped into the desired profile. The extruded tube then travels via a conveyor on a pallet to the knitting machine; following knitting, it passes directly to the T‑die of the second extruder for extrusion of the outer sheath, completing the basic tube structure. The finished tube is drawn by the first take‑up unit into a water bath for cooling, then enters a second water bath containing a release agent, undergoes further drawing, and finally proceeds to the automatic cutting equipment.

Hebei Shuangda Rubber and Plastics Machinery Co., Ltd. is a modern enterprise that integrates 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.