Overview:
Our Custom Silicone Keypad with Plastic Key Cap for PPS Machine Manufacturing combines the flexibility and tactile response of food-grade silicone with rugged PPS plastic key caps to withstand the harsh operating environment of paper-processing equipment. The silicone substrate is produced via precision compression molding, while PPS key caps are overmolded using high-temperature injection molding for a seamless bond and outstanding chemical, heat, and wear resistance. As seasoned OEM suppliers, we deliver turnkey solutions—offering tailored key layouts, durometer grades, and color and logo integration—to meet the rigorous demands of PPS machine control panels.
Key Specifications:
| Attribute | Details |
|---|---|
| Place of Origin | Xiamen, China |
| Brand Name | OEM |
| Application | PPS Machine Control Interfaces, Industrial Automation Panels |
| Item Name | Silicone Keypad with Overmolded PPS Plastic Key Caps |
| Substrate Material | Food-Grade Silicone Rubber (30–70A Shore) |
| Key Cap Material | Polyphenylene Sulfide (PPS) Injection Molded |
| Color Options | Silicone: Custom Pantone; Key Caps: RAL/Pantone |
| Logo Integration | Laser Etching or Pad Printing on Plastic Caps |
| Sample | Available upon request (5–7 days) |
| Certifications | ISO 9001, IATF 16949 |
| Technology | Silicone Compression Molding + PPS Injection Overmolding |
| MOQ | Flexible, Based on Your Requirements |
| Lead Time | 20–30 Days |
| Temperature Resistance | Silicone: –40 °C to +200 °C; PPS Caps: –40 °C to +260 °C |
| Chemical Resistance | High (Resistant to oils, solvents, cleaning agents) |
| Electrical Performance | Insulation substrate; PPS caps support integrated conductive elements if required |
Surface & Finishing Options:
- Silicone Surface Activation: Plasma treatment to improve overmold adhesion.
- Textured Key Cap Finish: Fine matt or gloss PPS finishes via mold insert texturing.
- Overmold Masking: Selective masking for backlighting or insert windows.
- UV-Stable Colorants: Add pigments to PPS caps for long-term color retention.
Production Process:
- Design & Tooling: CAD finalization of key geometry and cap profiles; CNC and EDM fabrication of multi-shot compression and injection molds to ±0.01 mm.
- Silicone Molding: Preheat compression presses to 170–190 °C, load food-grade silicone, and cure under 15 MPa pressure.
- Demold & Trim: Eject substrates and remove flash via pneumatic trimming.
- Surface Activation: Treat silicone with corona discharge to enhance PPS bonding.
- PPS Overmolding: Inject PPS resin at 300–320 °C onto treated silicone in multi-shot molds, forming integrated key caps.
- Cooling & Ejection: Controlled cooling cycle prevents warpage; eject complete key assemblies.
- Logo & Legend Application: Laser-etch or pad-print identifiers on PPS caps.
- Final Inspection & Functional Testing: Dimensional checks (CMM), durometer tests, and lifecycle key-actuation trials.
- Packaging: Pack in ESD-safe trays or custom kits, label with part numbers and lot codes.
- Logistics Coordination: Arrange JIT or bulk shipment per customer schedule.
Quality Assurance:
Our ISO 9001 and IATF 16949-certified QA process ensures every keypad meets demanding PPS machine requirements. We perform raw material validation via FTIR and melt flow analysis; in-process dimensional verification using CMM and 3D optical projectors; durometer testing to verify silicone hardness; and tensile and adhesion tests on PPS-silicone bonds. Chemical resistance is confirmed through solvent immersion trials, while actuation life tests simulate hundreds of thousands of key presses. Fully inspected under optical comparators and hardness testers, each unit is released only after passing 100% visual and functional checks.
Our Factory:
Our state-of-the-art facility features high-precision CNC machining and mirror/conventional EDM, plus slow-speed wire EDM for complex mold details. We operate 15 rubber compression presses and two high-temperature PPS injection machines, ensuring rapid cycle times and tight tolerances. Automated AutoDryers, precision die-cutters, and high-throughput doming stations optimize throughput. Our QA engineers leverage 3D optical projectors, sealing integrity testers, Shore durometers, and elasticity gauges to uphold stringent standards, delivering reliable, long-lasting keypads for the toughest industrial environments.