Rubber extrusion parts

Core Definition and Process Principles
Rubber extrusion is a process where the rubber compound is subjected to the extrusion force of the screw in the extruder, and through specific shaped orifices (for hollow products, a core type is also required), a continuous and automated molding process is achieved. The core feature of this process is:
Efficiency: Capable of continuous production, with a production efficiency much higher than those of molding and injection processes;
Variety: By changing the mold shape, various sectional shapes such as circular, square, irregular, and hollow can be produced;
Combinability: Through multi-machine combined extrusion, different component rubber compounds or multi-color rubber compounds can be combined and molded (such as composite tread rubber).
Typical application fields and product types
Rubber extrusion parts, with their characteristics such as sealing, shock absorption, insulation, and wear resistance, meet the core needs of many industries:
Automotive industry: Door and window sealing strips, oil delivery rubber hoses, shock absorption rubber parts, tire tread/inner tube semi-finished products;
Construction field: Door and window sealing rubber strips, building waterproofing sheets, waterstop, improving the sealing and waterproof performance of buildings;
Wires and cables: Cable sheaths, insulation layers, ensuring the safety of power transmission;
Industrial manufacturing: Rubber conveyor belts, rubber hoses (hydraulic, pneumatic), sealing gaskets, shock absorption and buffering components;
Medical/food: Medical catheters, food-grade rubber tubes, needing to meet hygiene level, non-toxic and odorless requirements.
Key performance testing and quality control
The performance of rubber extrusion parts directly affects the product's lifespan and safety. Therefore, multiple-dimensional testing is necessary to ensure compliance:
Basic performance: tensile strength, elongation at break, hardness, compressive permanent deformation (evaluating mechanical properties and elastic recovery);
Environmental adaptability: ozone resistance cracking, heat aging resistance, low-temperature resistance, weather resistance (simulating outdoor/extreme environment aging);
Special properties: oil resistance, chemical medium resistance, airtightness, wear resistance (suitable for specific application requirements);
Electrical properties (for cables): volume resistivity, dielectric strength, arc resistance (ensuring insulation safety).