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Rubber Extrusion
Definition of Rubber Extrusion
A continuous manufacturing process that heats, pressurizes and forces rubber compounds through a precision-shaped die to produce long profiles with consistent cross-sections, followed by curing/vulcanization and finishing.
Different from injection molding/compression molding, extrusion is more suitable for mass-produced, infinitely long products such as sealing strips, hoses, and cable sheaths.
Advantages of Rubber Extrusion
Continuous & High-Efficiency Production
Supports long-length, mass production with stable dimensions and high consistency.
Flexible & Complex Profile Shaping
Produces various custom shapes: D-shape, P-shape, U-channel, square, hollow, sponge, and special profiles.
Excellent Sealing Performance
Good elasticity, waterproof, dustproof, sound insulation, and shock absorption.
Wide Material Compatibility
Compatible with EPDM, silicone, NBR, CR, NR and other rubber compounds for different working conditions.
Superior Weather & Aging Resistance
UV-resistant, ozone-resistant, anti-aging, long service life especially for EPDM and silicone.
Wide Temperature Resistance
Stable performance under high or low temperature environments.
Easy Installation & Processing
Can be cut, bonded, or vulcanized into rings or frames according to requirements.
Cost-Effective for Mass Production
Lower unit cost for long-run production compared with molded rubber parts.
Customizable & Versatile
Fully customizable in size, hardness, color, density and profile.
Types of Rubber Extrusion
Rubber extrusion is mainly classified according to three core dimensions: "material, process, and product form". Different classifications correspond to different application scenarios.
Classification by Rubber Material
- EPDM Rubber Extrusion: Ozone-resistant, weather-resistant, and heat-resistant, suitable for automotive seals and construction seals.
- NBR Rubber Extrusion: Oil-resistant and fuel-resistant, suitable for industrial oil-resistant hoses and seals.
- Silicone Rubber Extrusion: High and low temperature resistant, non-toxic, suitable for medical, food, and aerospace fields.
- FKM Rubber Extrusion: Chemical-resistant and high-temperature resistant, suitable for chemical industry and high-end seals.
- NR Rubber Extrusion: Good elasticity and low cost, suitable for general industrial rubber parts.
Classification by Extrusion Process
- Single Extrusion: Single material and simple process, suitable for simple solid/hollow profiles.
- Co-extrusion: Synchronous extrusion of multiple materials, suitable for composite seals and profiles.
- Foam Extrusion: Foam structure, suitable for shock-absorbing, sound-insulating and thermal insulation parts.
- Continuous Vulcanization Extrusion: Synchronous extrusion and vulcanization, suitable for mass-produced standard products.
Classification by Product Cross-Section
Solid Extrusions: Such as solid rubber strips and buffer strips.
Hollow Extrusions: Such as hollow seals and rubber hoses.
Custom Shaped Extrusions: Custom cross-sections, suitable for special scenarios.
Composite Section Extrusions: Multi-structure composite, with multiple functions.
Various classifications can be cross-used in actual production (such as EPDM foam co-extrusion), and can be selected as needed.
FAQ
Q: What is the difference between Rubber Extrusion and Rubber Molding?
A: Rubber Extrusion is suitable for mass production of long, consistent cross-section products (e.g., seals, hoses); Rubber Molding is suitable for small, complex 3D products (e.g., small gaskets, rubber parts).
Q: What industries are suitable for Rubber Extrusion products?
A: It is widely used in automotive, construction, electrical home appliances, medical, aerospace, marine and industrial machinery industries, mainly for seals, hoses, profiles and other products.
Q: What are the key factors affecting the quality of extruded rubber products?
A: The key factors include rubber material quality, die design precision, extrusion temperature/pressure control, and vulcanization parameters. Any deviation may lead to defects such as uneven cross-section and poor elasticity.
Q: How to choose the right rubber material for extrusion?
A: It depends on the application scenario’s requirements for temperature resistance, oil resistance, weather resistance and toxicity. EPDM for automotive/construction seals, NBR for oil-resistant parts, silicone for medical/food fields, and FKM for high-temperature/chemical-resistant scenarios.
Q: Is Custom Shaped Extrusion available?
A: Yes. We can provide custom-shaped extrusion services according to customers' drawings or samples, including custom cross-sections, materials and sizes to meet special application needs.
As one of the most professional rubber extrusion manufacturers and suppliers in China, we offer a wide range of products with superior quality. Please feel free to wholesale high quality rubber extrusion made in China here from our factory. Also, custom service is available.
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