Manufacturing Capabilities
Silicone Compression Molding Services
High-quality custom silicone parts produced by compression molding — cost-effective tooling, wide material range, ideal for gaskets, seals, and complex silicone components.
What Is Silicone Compression Molding?
Compression molding is one of the most cost-effective and widely used processes for manufacturing silicone rubber parts. The process involves placing a pre-measured amount of silicone compound (preform) into a heated mold cavity, then closing the mold under high pressure. Heat and pressure cause the silicone to flow and fill the mold, where it cures (cross-links) into the final shape.
Compression molding is particularly well-suited for silicone because of silicone’s predictable flow and curing behavior. Parts produced this way exhibit excellent tensile strength, low compression set, and stable performance across a wide temperature range (−60°C to 230°C).
Our Compression Molding Process
We help you select the right silicone grade (durometer, color, FDA/UL rating). Custom compounding available for specialty applications.
Silicone is cut or extruded into pre-measured “preforms” matched to mold cavity volume — minimizing flash and material waste.
Preforms are loaded into the heated lower mold half; hydraulic press closes and applies 100–2,000 tons pressure.
Mold temperature held at 150–200°C. Cure time: typically 1–5 minutes per mm of wall thickness.
Parts are demolded; excess flash removed by tumbling, cryogenic deflashing, or precision trimming.
Food-contact and medical parts are post-cured in oven (200°C, 4–8 hrs) to remove volatile byproducts and stabilize dimensions.
Every batch inspected for dimensional accuracy (CMM / projector), Shore A hardness, appearance, and functional properties.
Technical Specifications
| Parameter | Capability |
|---|---|
| Max Part Size | 500 × 500 × 100 mm |
| Shore A Hardness | 10 – 80 Shore A |
| Mold Temperature | 150 – 200 °C |
| Dimensional Tolerance | ±0.15 – 0.30 mm (size dependent) |
| Tooling Lead Time | 15 – 30 days |
| Production Lead Time | 7 – 21 days |
| Color Options | Any Pantone / RAL |
| Certifications | FDA 21 CFR 177.2600 · LFGB · RoHS · REACH · UL 94 V-0 |
Typical Applications
O-rings, flat gaskets, custom seals for automotive, HVAC, industrial equipment.
FDA-grade bakeware, seals, gaskets for food-processing equipment.
Respiratory masks, tubing connectors, non-critical medical components. ISO 13485 available.
Insulators, bushings, keypads, enclosure seals, waterproof gaskets.
Kitchenware, baby products, wearable accessories, protective covers.
Grommets, vibration dampers, seals for lighting, sensors, and EV battery packs.
Why Choose Compression Molding for Silicone?
| Advantage | Detail |
|---|---|
| Low Tooling Cost | Simpler molds than injection; ideal for prototypes and medium batches. |
| No Gate Marks | Critical for sealing surfaces — no weld lines or gate scars. |
| Material Versatility | Works with all silicone hardness levels and specialty formulations (FDA, conductive, flame-retardant). |
| Large Part Capability | Can produce large parts (up to 500mm) that require impractically large injection machines. |
Design for Manufacturability (DFM) Tips
- Wall Thickness: Uniform 1.5–6 mm for even curing. Avoid sections >10 mm (risk of internal voids).
- Draft Angle: Minimum 1–3° on vertical walls; 3–5° recommended for deep cavities.
- Parting Line: Position where flash is acceptable or easily removed. Mark clearly on your drawing.
- Tolerance: Standard ±0.2 mm for small parts. See our full DFM Guide.
- Inserts: Metal or plastic inserts can be compression-overmolded. Discuss placement early.
Ready to Start Your Silicone Project?
Upload your drawing or describe your requirements — we’ll respond within 24 hours.