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2025
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The Production Process of Automotive Silicone Hoses
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The Production Process of Automotive Silicone Hoses
In modern automotive manufacturing, silicone hoses play a crucial role as essential components. Their excellent heat resistance, high pressure resistance, and flexibility make them widely used in engine cooling systems, and air delivery applications. Unlike most silicone hoses, automotive silicone hoses are produced using hand wrapping technique，ensuring high-quality products that meet the industry's stringent durability and precision standards.
Unlike the conventional extrusion process, DIAO silicone hoses are produced using the hand-wound method allows for meticulous manufacturing and inspection of each silicone hose. The production process consists of several key stages:
Raw Material Selection
The manufacturing of DIAO silicone hoses begins with carefully chosen high-grade silicone materials. These materials must exhibit exceptional heat resistance, chemical stability, and durability to withstand extreme automotive environments. Special reinforcement layers, such as polyester or aramid fabric, are also integrated to enhance the hoses＇ strength and flexibility.
Hand-Wrapping Process
Skilled technicians meticulously wind multiple layers of silicone sheets or silicone threads onto a mold. This process ensures tight bonding and uniform wall thickness, which enhances the hose’s pressure resistance and longevity. Compared to machine-extruded hoses, the hand-wound method allows for better customization, smoother internal surfaces, and a stronger structure.
Curing & Vulcanization
Once the silicone layers are wrapped, the hose undergoes a high-temperature vulcanization process in a specialized oven. This step cross-links the silicone molecules, forming a durable three-dimensional network structure that provides outstanding elasticity, thermal resistance, and mechanical strength. Diao silicone hoses are known for their ability to withstand extreme temperatures ranging from -60°C to 250°C, making them ideal for high-performance automotive applications.
Cooling, Trimming & Finishing
After curing, the hoses are carefully cooled to stabilize their shape. They are then trimmed, cut, and customized according to specific automotive requirements, ensuring a precise fit and flawless finish.
Rigorous Quality Control & Testing
Diao silicone hose undergoes a series of strict quality checks, including:
Pressure resistance testing to ensure it can handle high engine pressures.
Heat and cold resistance testing to guarantee performance in extreme conditions.
Flexibility and durability tests to confirm long-term reliability.
Only hoses that pass these rigorous tests are approved for distribution and use in high-performance vehicles.
With a meticulous hand-wound process and premium silicone materials, Diao silicone hoses set the industry benchmark for quality, durability, and performance. Whether for standard automotive applications or high-performance racing vehicles, these hoses deliver exceptional reliability and efficiency. As the automotive industry continues to evolve, Diao silicone hoses remain at the forefront, ensuring superior performance and long-term sustainability.
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Our factory specializes in the production and supply of high quality silicone hoses, food grade silicone hoses, medical silicone hoses, fuel hoses, radiator hoses, air rubber hoses, EPDM sealing strips, spiral protective covers and silicone plates and other trucks, automotive rubber accessories (support OEM and ODM).
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Wangguanzhuang Town, Qinghe County, Xingtai City, Hebei Province,China