What is UHMW Compression Molding?
UHMW is a challenging material to process because of its extremely high viscosity. It does not melt and flow like typical thermoplastics, so standard injection molding is not suitable. UHMW is usually shaped by compression molding. In this process, UHMW powder is placed into a mold, compressed under very high pressure, and heated below its melting point so that the polymer chains fuse together. This method produces strong, wear-resistant components with excellent dimensional stability.
Depend on our expertise in mold design, material handling, and process optimization, we provide UHMW compression molding solutions that combine durability, precision, and cost efficiency. Our team ensures fast turnaround, tight tolerances, and consistent quality, while offering flexible production from prototypes to high-volume runs. This allows us to deliver tailored, long-lasting UHMW parts that meet the unique requirements of diverse industries.
UHMW Compression Molding Capabilities & Options
Typical process capabilities for UHMW compression-molded parts are provided below for reference. Actual values may vary depending on material type, part geometry, dimensional tolerance, and surface finish requirements for specific applications.
| Parameter | Recommended Range |
|---|---|
| Max Part Size | 3000mm * 2500mm (118 inch * 98 inch) |
| Color Options | Natural white / Black |
| Surface Finishes | Glossy / Semi-glossy / Matte / Textured Finish |
| Tolerances | ±0.05 ~ ±0.3 mm |
| Injection Molding Cost | ⭐⭐⭐⭐☆ |
UHMW Material Properties
| Property | Density | Tensile Strength | Flexural Strength | Impact Strength (Unnotched) | Heat Deflection Temp (0.45 MPa) |
|---|---|---|---|---|---|
| Value/Description | 0.93-0.94 g/cm³ | 20-40 MPa | 60-70 MPa | 70-90 kJ/m² | 90-100℃ |
- The above parameters represent the baseline performance of the materials. Actual application should be dynamically optimized based on specific working conditions.
Related Process
Advantages & Disadvantages of UHMW Compression Molding
UHMW compression molding service offers many benefits but also some constraints. Understanding them will help you decide if UHMW compression molding is right for your project.
Advantages
- Exceptional wear and abrasion resistance
- Low friction surface, ideal for sliding parts
- High impact strength and toughness
- Excellent chemical resistance
- Good dimensional stability for large parts
Disadvantages
- Limited high-temperature resistance (max ~130℃)
- Longer cycle times compared to injection molding
- Surface finish may require post-processing
Applications of Compression Molded UHMW
Industrial Machinery
- Wear pads and liners
- Conveyor rollers
- Guide rails and bushings
Automotive
- Fuel system components
- Seals and gaskets
- Sliding parts and bearings
Medical
- Prosthetic liners
- Surgical instrument components
- Biocompatible sliding surfaces
Jiangzhi UHMW Compression Molding Parts Are Guaranteed
UHMW’s high molecular weight gives it excellent wear resistance and toughness, making compression molding an ideal process for producing strong, durable parts.
UHMW offers significantly higher abrasion resistance and impact strength than standard polyethylene, making it better suited for demanding applications.
Yes, UHMW is easily machinable to tight tolerances, allowing for secondary finishing and customization.
Tolerances typically range from ±0.1mm to ±0.3mm depending on part size and complexity.
Proper mold design, controlled temperature, and balanced pressure ensure minimal warping and high dimensional stability.
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