Electronics Industry
Custom molded and extruded rubber and plastic parts for electronic assemblies – built to your print, or designed with you.
Rubber and plastic applications in electronics
COi Rubber manufactures custom molded and extruded rubber and plastic parts for the electronics industry. Buyers come to us when a part has to seal, insulate, cushion or protect – inside an enclosure, at a cable entry, under a button, or between a board and the world around it. We work with original equipment manufacturers and contract manufacturers, building to your print or helping you design the part from the requirement up.
Below are common rubber and plastic applications in electronic assemblies, and the materials we mold for them. Send a drawing or a sample part and we will match the compound, durometer and process to the application.
应用领域：
- Enclosure gaskets and panel seals (rubber) – keep dust, moisture and washdown out of control boxes, instrument housings and junction enclosures. Compound choice follows the ingress target and the chemicals the seal will see.
- Keypads and buttons (rubber) – molded elastomer keypads and button boots give a sealed, tactile interface for panels, instruments and handheld devices.
- Grommets and cable entry seals (rubber) – protect wire and cable where it passes through sheet metal or housings; sized to the panel thickness and cable OD.
- Connector seals (rubber) – keep mated connectors sealed against spray and humidity.
- Vibration and shock mounts (rubber or rubber-metal assemblies) – isolate boards, drives, fans and instruments from chassis vibration.
- Heat-resistant pads and insulators (rubber) – cushion and insulate near power components where sustained heat is a factor.
- Plastic housings, bezels and trim (plastic) – molded or extruded plastic components where insulation, weight or cosmetics call for polymer instead of metal.
Materials:
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Have a question? Use our contact form to receive information regarding your inquiry. You may also give us a call at (626) 965-9966.
Materials and your RFQ
Dust, moisture and heat are the enemies of electronic assemblies. Silicone keeps its properties across a wide temperature range and suits keypads, seals and insulating pads. EPDM resists weather and water for outdoor enclosures. Neoprene (CR) balances oil, ozone and weather resistance for general-purpose gaskets and boots. FKM resists chemicals and cleaning agents where enclosures see harsh washdown. Natural rubber and SBR bring resilience for mounts and bumpers.
When you request a part, tell us the temperature range, ingress target, chemical exposure and expected service life, and include the drawing or a sample part. We match the compound and durometer to that.
Design considerations for electronic parts
The right compound depends on the conditions the part will live in. The points below shape material and geometry choices for electronic applications:
- Sealing and ingress. The target level of dust and water protection drives gasket profile, compression and compound. Tell us the ingress target and whether the seal sees washdown or only occasional spray.
- Temperature and thermal cycling. Continuous and peak temperatures narrow the compound list; silicone keeps its properties across a wide temperature range, EPDM suits outdoor weathering, FKM covers chemical and heat exposure together.
- Electrical behavior. Parts near live circuits may need specific insulation properties; tell us at RFQ if the assembly is ESD-sensitive so compound selection can account for it.
- Flammability requirements. If your assembly specification calls for a flammability rating such as UL 94, include that requirement with the drawing so material selection starts from it.
- Vibration and shock. Durometer and geometry trade damping against stability; mounts for fans, drives and boards are sized from the load and the frequencies involved.
- Chemical exposure. Cleaning agents, oils and solvents rule compounds in or out – list what the part will contact.
These are engineering considerations to review together at the quoting stage, not guarantees of suitability for a specific application.
Molding and extrusion for electronics
We match the process to the part and the volume:
- Rubber molding – compression, transfer and injection molding for gaskets, seals, keypads, boots, mounts and pads, from prototype quantities through production runs.
- Plastic molding and extrusion – injection-molded housings, bezels and trim, plus extruded profiles where the cross-section is constant.
- Bonded assemblies – rubber bonded to metal or plastic inserts where the part must seal and fasten in one piece.
Send a drawing or a sample part and we will recommend the process, tooling approach and compound together.
From prototype to production
Every new part goes through first article inspection or a Level 1 PPAP (Production Part Approval Process) before production – Level 3 for automotive, Level 4 for higher-requirement projects. We provide material certifications verified in our own lab against your material requirements, plus a dimensional layout, a bubble blueprint and a signed first article form. Level 3 goes into full industry-standard PPAP documentation depth: design records, process flow, PFMEA, control plan, MSA, capability studies (CPK) and the Part Submission Warrant (PSW). Higher-requirement projects can run customer-defined Level 4 submissions where specified. Our manufacturing facility is IATF 16949 certified, with APQP and 5-Why and fishbone root-cause analysis built into our quality process. Once a part is approved, we hold the compound, durometer and tooling consistent so reorders match the approved part.
What to include in your RFQ
A complete RFQ gets a faster, more accurate quote. Include what you can from this list:
- Drawing or sample part (2D or 3D files welcome)
- Prototype and annual quantities
- Operating environment: temperature range, ingress target, chemical exposure
- Any required standard or rating (for example a flammability rating)
- Tolerance and fit requirements, including mating surfaces
- Target timeline for samples and production
Send these to sales@coirubber.com and we will respond with material and process recommendations.