What is UHMW Compression Molding?
Our UHMW compression molding process involves placing ultra-high molecular weight polyethylene (UHMW) resin into precision molds, then applying heat and pressure to form strong, wear-resistant parts. This method ensures excellent mechanical properties, dimensional stability, and consistent quality.
With expertise in mold design, material handling, and process optimization, we deliver cost-effective and scalable UHMW compression molded parts for diverse industries. From prototypes to high-volume runs, our process guarantees tight tolerances and long-lasting performance.
| Parameter | Recommended Range |
|---|---|
| Wall Thickness | 2mm - 8mm |
| Maximum Part Size | 600mm × 600mm |
| Minimum Feature Size | 1mm - 2mm |
| Tolerances | ±0.1mm - ±0.3mm |
UHMW Material Properties
UHMW (Ultra High Molecular Weight Polyethylene) is a thermoplastic known for its extreme abrasion resistance, low friction, and excellent chemical inertness. Key properties include:
| 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.
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
UHMW compression molded parts are widely used in industries requiring durable, low-friction, and wear-resistant components. Typical applications include:
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
Precision molded UHMW parts with consistent quality, superior wear resistance, and long service life — engineered by experts and trusted by top industries.
What makes UHMW suitable for compression molding?
UHMW’s high molecular weight gives it excellent wear resistance and toughness, making compression molding an ideal process for producing strong, durable parts.
How does UHMW compare with other polyethylene grades?
UHMW offers significantly higher abrasion resistance and impact strength than standard polyethylene, making it better suited for demanding applications.
Can UHMW parts be machined after molding?
Yes, UHMW is easily machinable to tight tolerances, allowing for secondary finishing and customization.
What are typical tolerances achievable in UHMW compression molding?
Tolerances typically range from ±0.1mm to ±0.3mm depending on part size and complexity.
How do you control warping or deformation during molding?
Proper mold design, controlled temperature, and balanced pressure ensure minimal warping and high dimensional stability.
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