Compression Molding for Custom Silicone Parts
Controlled heat, pressure and cure cycles for durable custom components, thick sections and cost-effective production.
Request a Drawing ReviewExplore ProductsHow the Process Supports Your Part
Compression molding places a measured charge of high-consistency silicone rubber into a heated precision tool. The press closes, the material flows through the cavity, and the part cures under defined time, temperature and pressure. It is a practical route for robust geometries, larger components, fabric-reinforced parts and programs that value tooling economy.
Final feasibility, tolerance, tooling and test recommendations are confirmed after reviewing the actual drawing, material and service environment.
LSAN Silicone project evidence
LSAN Silicone supports custom silicone component development from Nanjing, China, drawing on more than 30 years of silicone manufacturing experience and a 5,000 m² production facility.
Company information last reviewed August 2026. Process claims and material declarations are supplied only when supported by the specific project documents.
Where This Capability Adds Value
Gaskets, seals and O-rings
Reviewed around geometry, material behavior, service conditions and measurable acceptance criteria.
Bellows, boots and protective covers
Reviewed around geometry, material behavior, service conditions and measurable acceptance criteria.
Vibration isolators and thick molded parts
Reviewed around geometry, material behavior, service conditions and measurable acceptance criteria.
Fabric-reinforced diaphragms
Reviewed around geometry, material behavior, service conditions and measurable acceptance criteria.
Low- to medium-volume industrial programs
Reviewed around geometry, material behavior, service conditions and measurable acceptance criteria.
Parts requiring inserts or secondary trimming
Reviewed around geometry, material behavior, service conditions and measurable acceptance criteria.
Information Our Engineers Need
Clear inputs reduce assumptions, shorten DFM review and produce a more meaningful quotation.
| Part data | 2D drawing plus STEP/STP model or a dimensioned sample |
|---|---|
| Material | HCR silicone grade, cure system and required declarations |
| Hardness | Target Shore A and acceptable range |
| Performance | Temperature, media, pressure, compression and service life |
| Appearance | Color, surface finish, flash limit and cosmetic zones |
| Volume | Prototype quantity, annual demand and order pattern |
DFM Points Reviewed Before Tooling
- Place parting lines away from sealing and visible surfaces.
- Use consistent walls and practical radii to support material flow and release.
- Define critical dimensions separately from reference dimensions.
- Call out insert preparation, bonding requirements and pull-out expectations.
- Agree on flash, gate evidence and post-cure requirements before tooling release.
Controls Defined Around Part Risk
- Incoming material identity and lot traceability
- Tool-temperature and cure-cycle control
- First-piece and in-process dimensional inspection
- Visual inspection for flash, voids, short fill and contamination
- Project-specific post-cure and functional testing
Any dimensional capability, inspection frequency or certification statement must be agreed for the actual part and material.
From Drawing Review to Repeatable Production
Drawing and requirement review
Document decisions and release the next stage only after review.
Material and molding-route recommendation
Document decisions and release the next stage only after review.
DFM, shrinkage and parting-line review
Document decisions and release the next stage only after review.
Tool design and approval
Document decisions and release the next stage only after review.
First-article molding and dimensional report
Document decisions and release the next stage only after review.
Process validation and controlled production
Document decisions and release the next stage only after review.
Industries and Application Scenarios
Medical equipment housings and seals
Material and process recommendations remain project-specific.
Aerospace environmental protection
Material and process recommendations remain project-specific.
Defense and ruggedized electronics
Material and process recommendations remain project-specific.
Robotics bellows and vibration control
Material and process recommendations remain project-specific.
Industrial valves and machinery
Material and process recommendations remain project-specific.
Food-processing equipment components
Material and process recommendations remain project-specific.
Industry references describe typical application contexts and do not imply approval for a regulated end use.
Common Questions
When is compression molding preferred?
It is often selected for HCR silicone, larger or thicker parts, reinforced structures and programs where robust tooling economics matter more than the fastest cycle time.
Can you mold complex shapes?
Yes, provided draft, undercuts, parting strategy, venting and demolding are reviewed during DFM.
Can inserts be molded in?
Metal, plastic or fabric inserts may be possible after reviewing thermal compatibility, surface preparation and mechanical retention.
Is post-curing always required?
No. The need depends on material, cure system, application and customer specification.
What is needed for a quotation?
Send a drawing or sample, material and hardness target, service conditions, annual volume and required inspection documents.
Build the Right Manufacturing Route
Send Your Drawing for Engineering Review
Tell us what the component must do, where it operates and how many parts you need. Our team will review the manufacturing route and the assumptions that need confirmation.
Recommended attachment: STEP/STP or PDF drawing with material, hardness, tolerances, service environment and annual quantity.