Custom Components
Rubber & Silicone Molded Parts LSR, Compression & Transfer Molding
We manufacture high‑quality elastomer components — seals, gaskets, overmolds, boots, diaphragms and custom molded parts — using LSR injection, compression and transfer molding. From medical-grade LSR to durable EPDM and FKM seals, our tooling and process controls deliver repeatable parts with traceable materials and validation testing.
- LSR injection molding for medical, food and high‑precision applications
- Compression & transfer molding for large volumes and engineered elastomers
- Insert molding, overmolding, post‑cure ovens, trim automation and clean‑room assembly
LSR Injection
High‑precision, low‑contamination molding for medical and consumer parts.
Compression & Transfer
Robust process for engineered rubbers and medium/large parts.
Trim & Assembly
Automated trimming, inspection and clean‑room assembly for regulated products.
What We Make
LSR & Liquid Silicone Molding
Automated LSR injection with metering pumps and dosing for high repeatability. Ideal for medical seals, baby‑safe parts, optical housings and high‑temperature connectors requiring biocompatible materials.
Compression & Transfer Molding
Engineered elastomers such as EPDM, NBR and FKM for automotive seals, vibration mounts and chemically resistant gaskets. Supports large cavity tooling and multi-cavity transfer systems.
Overmolding & Insert Molding
Overmolding of elastomers onto plastics/metal inserts for integrated seals, grips and electrical housings. Overmolded assemblies reduce part count and improve reliability.
LSR Injection Molding
LSR is a two‑part liquid silicone injected into temperature‑controlled molds. We run automated LSR cells with inline metering, shot‑to‑shot traceability and integrated post‑cure ovens to ensure consistent mechanical properties and low extractables for sensitive applications.
Typical LSR deliverables
- Medical‑grade LSR with traceable lot MTRs
- High cosmetic finish (glistening control, texture options)
- Automated degating and post‑cure for dimensional stability
Compression & Transfer Molding
Compression molding is effective for medium to large parts, high durometer elastomers and compounds that are not suited to injection. Transfer molding gives improved flash control and repeatability for complex geometries.
Typical use cases
- EPDM and NBR seals for automotive & HVAC
- FKM (Viton) components for chemical resistance
- Large diaphragms, gaskets and molded boots
Materials & Typical Properties
We work with a broad family of elastomers to match temperature range, chemical resistance and regulatory needs: LSR (medical grades), VMQ (silicone), EPDM, NBR, FKM, Neoprene, TPU and custom compounds.
Key material characteristics
1
Temperature Range
Silicone/LSR: -60 °C to +200 °C; FKM: up to +250 °C (application dependent)
2
Durometer
Shore A 10 — 90 typical; micro‑hardness ranges available for specific compounds
3
Compression Set
Varies by compound — we select low compression set materials for static seals
4
Chemical Resistance
FKM for fuel/chemical resistance; EPDM for weather & steam; custom compounds for specific fluids
Tooling, Cavities & Maintenance
We design tooling for minimal flash, uniform cure and consistent dimensional output. LSR molds are often made from stainless or high‑grade tool steels with polished cavities.Compression/transfer tooling is designed for heat balance and venting. We support mold PM, spare cavities and refurbishment programs to protect NPI schedules.
Tool life & maintenance
Tool maintenance plans, spare core/cavity management and refurbishment reduce downtime and protect long‑term part consistency.
Inspection, Material Certificates & Testing
We provide material MTRs, hardness (durometer) reports, tensile/tear tests, compression set measurements and visual/cosmetic inspections. For medical parts we can provide extractables/biocompatibility data where required.
Cleanroom & traceability
Cleanroom molding and assembly (ISO 7/8) available for medical and optical parts with full lot traceability and serialization when required.
Qualification & Reliability
Typical tests include accelerated aging, compression set over time, environmental exposure (salt spray, ozone), thermal cycling and functional life testing to meet customer reliability targets.
Documentation
We include test reports, FAI/PPAP packages and recommended shelf‑life and storage guidelines for molded elastomers.
Applications
Automotive & EV Components
Sealed housings, connectors, gaskets, cable boots and trim components with automotive-grade processes.
Medical & Healthcare
Biocompatible LSR parts, sterilizable plastics and clean assembly workflows.
Telecom & Consumer
Overmolded grips, keypads, gaskets and weather seals for outdoor equipment and consumer products.
Case Studies
Medical LSR Valve Seal
Automated LSR molding and post‑cure produced a Class II valve seal with biocompatible grade LSR, full lot traceability and validated extraction limits.
EV Coolant Hose Boot
EPDM molded boot with integrated gasket and overmolded flange for simple installation and long service life in under‑bonnet environments.
Frequently Asked Questions
How do I choose between LSR and silicone solid molding?
LSR is best for high repeatability, low contamination and medical/consumer parts requiring tight cosmetics. Solid silicone (compression) is suitable for lower-volume runs or compounds not available in LSR formulations.
What tolerances can you hold for molded elastomers?
Typical molded tolerances are ±0.10–0.25 mm. Critical dimensions can be tightened with post‑process machining or special tooling; specify tolerance and feature criticality during RFQ.
Do you support clean‑room molding and assembly?
Yes — ISO 7/8 cleanroom molding, post‑cure and final assembly options are available for medical and optical components with strict contamination controls.
