Silicone Molding
NICE Rapid provides compression molding and LSR injection molding for silicone seals, gaskets, medical components, and flexible parts. Both processes are available with food-grade and medical-grade certifications and run in-house at our Shenzhen facility.
Compression molding suits flat and moderately complex geometries at lower tooling cost. LSR injection molding suits intricate parts requiring consistent quality, flash-free production, and biocompatible certification. Our engineers recommend the right process based on your part geometry, volume, and compliance requirements.
What Sets Us Apart
Precision Silicone Manufacturing
Two silicone molding processes in-house
compression molding and LSR injection — best process recommended for every part.
Medical & food-grade certifications
FDA 21 CFR and ISO 10993 compliant grades available for food-contact and implantable applications.
Wide shore hardness range
Shore A10 to A90 available across both processes — from ultra-soft seals to firm structural gaskets.
ISO 9001:2015 certified
shore hardness, dimensional, and visual inspection records provided on every production batch.
Our Silicone Molding Services
Compression Molding (HCR)
High-consistency silicone rubber (HCR) and other thermoset elastomers pressed in heated steel molds under hydraulic pressure. Lower tooling cost and shorter lead time. Suited to flat and moderately complex geometries — seals, gaskets, O-rings, keypads, and grommets.
LSR Injection Molding
Two-component liquid silicone rubber metered, mixed, and injected into a heated self-sealing mold. Fully automated flash-free production with consistent wall thickness and biocompatible certifications. Suited to complex, intricate parts — medical devices, wearables, precision seals, and consumer silicone products.
Our Process
STEP 1
Design Review
Submit CAD files in STEP, IGES, STL, or DXF format. Our engineers review for silicone-specific DFM: parting lines, draft angles, wall thickness, and gate location.
STEP 2
Process Selection
We recommend compression molding or LSR injection based on your part geometry, volume, tolerance requirements, and certification needs.
STEP 3
Tooling
Steel compression mold or self-sealing LSR mold CNC machined and trialed. First-article samples produced for your approval.
STEP 4
Material & Grade Selection
Silicone grade confirmed — general purpose, food-grade (FDA), medical-grade (ISO 10993), or specialty (self-lubricating, conductive, fluorosilicone).
STEP 5
Production
Parts produced to approved first-article standard. Shore hardness, dimensional, and visual inspection on every batch.
STEP 6
Post-Processing & Packing
Post-cure oven cycle for medical and food-grade parts. Deflashing, inspection, and clean-room packing available.
Silicone Grades
| Material | Key Properties | Suitable Applications |
|---|---|---|
| Silicone (HCR, Shore A 20–80) | Heat resistant to 200°C, food-grade options | Seals, keypads, infant products, kitchen accessories |
| General-Purpose LSR | Wide shore hardness range, good aging | Industrial seals, gaskets, grommets |
| Food-Grade LSR (FDA 21 CFR) | Non-toxic, taste and odor neutral | Kitchenware, baby products, food seals |
| Medical-Grade LSR (ISO 10993) | Biocompatible, sterilizable | Implantable components, surgical seals |
| High-Temperature LSR (to +230°C) | Thermally stable, UV resistant | Under-hood seals, industrial high-temp applications |
| Self-Lubricating LSR | Reduced friction surface | Moving seals, valves, catheter coatings |
| Fluorosilicone | Chemical and fuel resistant | Fuel system seals, aerospace applications |
Materials
Silicone materials are available in Shore A 10–80 across multiple grades. Medical-grade USP Class VI, FDA food-contact, and high-temperature (up to 250°C continuous) variants available.
Full material specifications are provided on the Compression Molding and LSR Molding service pages.
The Output
Compression molding tolerance: ±0.2–0.5mm, LSR injection tolerance: ±0.05–0.1mm, depending on requirements
Lead time: 2–3 weeks (compression tooling), 3–4 weeks (LSR tooling)
Batch size: 10–5,000 pieces (optimal 100–2,500 pieces)
Quality certifications: ISO 9001, FDA 21 CFR, USP Class VI, RoHS
Industries We Serve
Silicone Parts for Demanding Applications.
Share your material requirements and part geometry. Quote and process recommendation within 48 hours.