Hongjie molds custom silicone (VMQ/FVMQ) components for OEM assemblies in medical, appliance, electrical and industrial equipment. Established in Shenzhen in 2001 and certified to IATF 16949:2016 and ISO13485:2016, we take projects from a drawing straight to production at our own 11,000 m² facility — no trading intermediary in between.
Liquid silicone rubber (LSR) injection molding suits tight-tolerance, high-cavity parts. Compression molding is better suited to thicker wall sections or projects where an LSR mold is not justified.
Process selection depends on wall thickness, cavity count and part geometry. See injection vs. compression molding for rubber parts for the main trade-offs.
Hongjie's roughly 150-person team supports both processes, with in-house tooling review to check manufacturability before sampling.
Standard VMQ silicone covers most cushioning, insulation and general sealing requirements. FVMQ (fluorosilicone) is used when fuel or oil exposure exceeds the resistance of standard silicone.
Hardness ranges from 20–90 Shore A. FDA- and NSF-compliant compounds are available for food-contact, appliance and medical-adjacent applications, with colors matched to the customer specification.
For regulated medical assemblies, production follows the ISO 13485:2016 quality system. This covers manufacturing controls and material compliance; device-level clearance remains the OEM’s responsibility.
| Process & Capacity | Detail |
|---|---|
| Service Temperature | −50°C to +200°C for standard VMQ grades; wider range with FVMQ |
| Cure System | Platinum (addition) cure, supporting both LSR and HCR |
| Press Tonnage | Sized to part geometry and cavity count per project |
| Cavitation | Single- to multi-cavity tooling built to order |
| Annual Capacity | Contributes to Hongjie's 50M+ parts delivered annually across all compounds |
Silicone tools are qualified against a tolerance band tied to feature size, not a single blanket figure:
| Dimension Range | Standard Tolerance | Precision Tolerance |
|---|---|---|
| 0–10 mm | ±0.10 mm | ±0.02 mm |
| 10–25 mm | ±0.15 mm | ±0.05 mm |
| 25–50 mm | ±0.20 mm | ±0.08 mm |
| 50–100 mm | ±0.25 mm | ±0.10 mm |
Production runs are monitored under statistical process control with a target Cpk above 1.33, and SPC records are available per production lot on request.
Common silicone geometries we mold:
Rubber Gasket Manufacturer, or for gaskets seated around mounting holes, Rubber Grommet Gaskets for Mounting Holes
Custom Molded Silicone Washers with 3D Profiles, or browse Custom Rubber Washers & Sealing Discs across all compounds
O-Ring options in silicone or other compounds
Non-sealing molded geometry — covers, spacers, insulating standoffs: Precision Molded Rubber options
Certified manufacturing
Certified quality system
For electrical applications
Material options
Material options
Send a 2D drawing, 3D model or physical sample for engineering review. Complex geometries can also be assessed through 3D CAD and FEA.
Functional prototypes are typically ready in 3–5 business days before tooling and production approval. Silicone rubber options are available alongside NBR, FKM and EPDM when compound selection is still under review.
Explore complementary sealing solutions from our comprehensive product catalog.
