What is Silicone Compression Molding?
Silicone compression molding is a traditional yet highly effective method for producing durable silicone parts. We use solid silicone rubber (not LSR) and press it into precision-machined molds under heat and pressure. This allows for excellent part integrity and reliable mechanical properties.
Our expertise in compression molding ensures tight tolerances, minimal material waste, and scalable production—from prototypes to high-volume batches. We offer high-quality products at low cost with reliable, on-time delivery. Partner with us for dependable quality, cost efficiency, and a supply chain you can count on.
| Parameter | Recommended Range |
|---|---|
| Wall Thickness | 1.5 mm – 8 mm |
| Maximum Part Size | 500mm × 500mm × 500mm |
| Minimum Feature Size | 0.8 mm – 1 mm |
| Tolerances | ±0.2mm – ±0.5mm |
Silicone Rubber Material Properties
Silicone rubber is a flexible, chemically stable, and temperature-resistant elastomer ideal for demanding applications. We use high-purity, solid silicone materials with excellent electrical and sealing performance.
| Property | Density | Tensile Strength | Flexural Strength | Impact Strength (Unnotched) | Heat Deflection Temp (0.45 MPa) |
|---|---|---|---|---|---|
| Value/Description | 1.02–1.05 g/cm³ | 40 -50 MPa | 60-70 MPa | 20 -30 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 Silicone Compression Molding
Silicone compression molding service offers a cost-effective way to produce durable, heat-resistant silicone rubber parts. It’s ideal for complex shapes and small to medium runs. However, it also comes with some limitations. Let’s explore the key pros and cons of this molding process.
Advantages
- Excellent heat and cold resistance
- Superior sealing and flexibility
- Good chemical and environmental resistance
- Cost-effective for small to medium production
- Less material waste than injection molding for some part types
Disadvantages
- Longer cycle times vs injection molding
- Limited to simpler part geometries
- Not suitable for high-speed automation
- Higher manual labor cost for demolding and trimming
Applications of Compression Molded Silicone
Compression molded silicone parts are widely used across industries that demand flexibility, durability, and resistance to heat, chemicals, or weather. From automotive seals to medical-grade components, this process supports reliable performance in both standard and high-stress environments.
Medical & Healthcare
- Silicone gaskets
- Mask components
- Sealing rings in diagnostic devices
Electronics & Electrical
- Silicone keypads
- Connector seals
- Heat-resistant insulators
Industrial Equipment
- Valve seals
- Shock-absorbing pads
- Dust-proof covers
Consumer Goods
- Baby products
- Kitchenware handles and grips
- Waterproof buttons
Jiangzhi Silicone Compression Molding Parts are Guaranteed
100% satisfaction: High-performance silicone rubber mouldings with excellent resilience, precise dimensions, and stable quality – your vision, expertly molded in silicone.
Do you offer liquid silicone rubber (LSR) molding?
No, we only offer compression molding for solid silicone rubber. If you're unsure which silicone method fits your project, we’re happy to advise.
What’s the difference between compression and injection molding for silicone?
Compression molding is ideal for larger, simpler silicone parts and lower production volumes. Injection molding, on the other hand, is faster and better suited for producing complex, high-volume parts. However, for many low- to mid-volume applications, compression molding remains the more cost-effective option.
What causes flashing or defects in silicone molded parts?
Improper mold alignment, insufficient venting, or excess material can cause flash. We control all molding parameters and provide post-molding trimming to ensure clean parts.
How long does silicone compression molding take?
Tooling takes 2–4 weeks. Production time depends on part complexity and volume, usually 1–5 minutes per part cycle.
