How Custom Rubber Parts Are Made: From Drawing to Delivery
Sourcing custom-molded rubber components can be challenging. You have CAD drawings, strict performance requirements and tight timelines, and you may wonder how your design becomes finished, shippable rubber parts.
Feizhipan Sealing delivers a full end-to-end custom rubber manufacturing service. Below is the complete production process — organized in tables for quick reference — from drawing review and material selection through mold development, sampling, mass production, final QC and export delivery.
Drawing Review & Material Selection
We accept 2D PDF / DWG and 3D STEP files. Our engineers perform a DFM (Design for Manufacturability) review to check geometry, tolerances and molding risks, and suggest design optimizations that cut tooling cost and reduce defects.
| Rubber Material | Core Properties | Typical Applications |
|---|---|---|
| EPDM | Excellent UV & weather resistance | Outdoor seals, automotive exterior parts |
| Silicone | Wide temperature range, food-grade available | Food equipment, medical accessories, high-temp gaskets |
| NBR (Nitrile) | Great oil & fuel resistance | Hydraulic seals, fuel system parts |
| FKM (Viton®) | Superior heat & chemical resistance | High-performance industrial sealing |
💡 Material Guide: Need help choosing between elastomers? Read our detailed comparison: EPDM vs. Silicone vs. NBR →
Mold Development
Mold quality determines dimensional accuracy, surface finish and batch consistency. Rubber shrinkage is calculated and added into cavity dimensions during mold design.
| Mold Stage | Activities | Notes |
|---|---|---|
| Mold Design | Parting line, runner, gate, venting layout | Shrinkage factor applied |
| CNC / EDM Machining | Cavity fabrication | Precision tooling |
| Initial Trial | First test shot | Check dimension & appearance |
| Mold Revision | Adjust cavity if sample fails | Repeat trials until approved |
🔧 Looking for a mold maker? Check out our full Custom Mold Service & Prototyping Capabilities →
Sampling & Customer Approval
Samples are made for your validation before mass production. Check the following items on each sample:
| Verification Item |
|---|
| Dimensional tolerance |
| Hardness (Shore A) |
| Color matching |
| Surface condition: no flash, bubble, scratch |
| Assembly & sealing performance |
Mass Production & Quality Control
Once samples are signed off, we start volume molding with in-process quality control to guarantee batch-to-batch consistency.
| In-process QC Check |
|---|
| Key dimension inspection |
| Shore hardness test |
| Visual check: no burr, crack, deformation |
| Aging / oil immersion / temperature test (on request) |
Export & Delivery
We manage export customs, booking and shipment from Qingdao, Shanghai and Ningbo, and provide the full trade documentation required for import clearance: Commercial invoice, Packing list, Certificate of origin.
We track your cargo and send regular updates until goods safely arrive at your destination port.
Ready to Start Your Custom Rubber Project?
Send your drawing, physical sample or application requirements. Our engineering team will deliver a formal quotation within 24 hours.
Request a Quote Now →📩 Email: pengfei_liu@feizhipan.com | 🌐 Website: feizhipan.com