1. Raw Material Preparation: High-quality PVC resin, plasticizers, stabilizers, and colorants are carefully selected and weighed according to precise formulations. This ensures the hose meets standards for flexibility, durability, and weather resistance.
2. Mixing and Plasticizing: The raw materials are added to a high-speed mixer for thorough blending, creating a uniform dry blend. This mixture is then fed into an extruder, where it undergoes heating and shearing to become a molten PVC compound with consistent viscosity.
3. Extrusion Molding: The molten PVC is pushed through a specialized die under controlled pressure, forming the inner tube of the hose. Simultaneously, a reinforcement layer (such as polyester yarn or mesh) may be embedded during this stage to enhance strength and prevent kinking.
4. Cooling and Sizing: The newly formed hose is immediately passed through a cooling water tank, which rapidly solidifies the PVC and maintains the desired dimensions. Sizing tools ensure the hose has accurate diameter and wall thickness.
5. Surface Treatment: After cooling, the hose undergoes surface polishing or coating to improve smoothness, UV resistance, and resistance to abrasion. This step also enhances the hose's appearance and ease of handling.
6. Cutting and Inspection: The continuous hose is cut into standard lengths using precision cutting equipment. Each piece undergoes strict quality inspection, including checks for leaks, cracks, dimensional accuracy, and overall performance, to ensure only qualified products leave the factory.
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