Overview:
Our Customized Steel Injection Molding Tooling for Plastic Toilet Seat Cover Lids is engineered for high-precision, high-volume household applications. Built from premium mold steels (P20, H13, 718, S136, etc.), the tooling is manufactured using advanced CNC machining and EDM processes, mirror-polished cavities and precision assembly to deliver tight tolerances, excellent surface finish, and long tool life. Designed for OEM production of sanitary-grade toilet seat lids, the molds support hot- or cold-runner systems, single- or multi-cavity layouts, and a variety of gate styles to match your cycle-time and cosmetic requirements. We provide full one-stop services from DFM and prototyping to trial runs, production support, and after-sales maintenance.
Key Specifications
| Item | Specification |
|---|---|
| Mold Type | Injection mold for toilet seat cover / lid |
| Mold Steel Options | P20, P20H, H13, 718, S136 (pre-hardened or hardened options) |
| Mold Base Standards | HASCO, DME, LKM, MISUMI, JIS |
| Cavity | Single or Multi-cavity (custom per drawing) |
| Runner System | Hot Runner / Cold Runner |
| Gate Types | Sub-gate, Pin-point gate, Edge gate (per cosmetic & strength needs) |
| Core/Cavity Machining | 5-axis CNC roughing/finishing; High-precision EDM (sink & wire) |
| Surface Finish | Mirror polish (Ra 0.2–0.4 µm) / Matte texture options per sample |
| Tolerance | Typical ±0.01–0.05 mm (depends on geometry) |
| Mold Life | 500,000 – 1,000,000+ shots (steel grade & treatment dependent) |
| Materials Molded | ABS, PP, PC+ABS blends, SAN, POM (customer-specified) |
| Cooling System | Conformal / baffle cooling on request for cycle optimization |
| Ejector System | Balanced ejectors / stripper plates as required |
| Finish Options | Nickel plating, Hard chrome plating, PVD multilayer, Precision polishing |
| Mold Assembly & Tryout | Full assembly, trial runs with customer resin, 1st-article samples |
| Design Tools Supported | UG (NX), PRO/E, SolidWorks, CAD |
| Lead Time | Typical 25–35 days (depending on complexity & approvals) |
| Packing | Wooden crate / foam protection / export-standard packaging |
| Certifications | ISO 9001 / IATF 16949 (factory standards) |
Surface Treatment Options
- Nickel (Electroless) Plating — Uniform corrosion protection and improved hardness for complex cavities.
- Hard Chrome Plating — High wear resistance and low friction for extended tool life in abrasive resins.
- PVD Multilayer Coatings (e.g., CrN, AlCrN) — Enhanced surface hardness, thermal stability and improved release for demanding cycles.
- Precision Polishing / Texturing — Mirror polish for glossy parts or custom textures to match part aesthetics.
Advantages of Our Mold:
- Engineered for high cosmetic quality and dimensional stability of toilet seat lids.
- Manufactured with high-grade steels and precision CNC + EDM to deliver long tool life.
- Flexible runner/gate options and cooling designs for optimized cycle times.
- Full OEM support: prototyping, FAI, PPAP/traceability, and after-sales maintenance.
One-Stop Service
We provide a complete, integrated service chain: technical DFM and mold-flow consulting, rapid prototyping, precision CNC/EDM mold fabrication, surface finishing, full mold assembly, trial runs with your production resin, certified first-article reports, tailored packaging, logistics and ongoing maintenance/support — all coordinated by a dedicated project manager to ensure on-time, on-spec delivery.
Quality Assurance
All molds undergo a comprehensive QA program: incoming steel validation and hardness checks, coordinate measuring machine (CMM) inspection of critical dimensions, surface roughness analysis, and tool-life validation. First-article inspection (FAI) reports, sample traceability, and pilot-run data (cycle time, shrinkage, warpage) are provided. We operate under ISO 9001 and IATF 16949 quality systems and use equipment such as CMMs, profilometers, Rockwell hardness testers, and 3D optical projectors to ensure dimensional accuracy and repeatability.
Our Factory:
Our advanced manufacturing facility is equipped with the latest technologies, including CNC machining, Mirror EDM, conventional EDM, and Slow-Speed Wire Cutting (WC), enabling the highest levels of precision in mold fabrication. With 15 rubber compression molding presses and 2 LSR injection molding machines, we efficiently scale production while ensuring consistent and optimal performance. To uphold industry-leading standards, we utilize state-of-the-art inspection tools such as 3D projectors, sealing testers, durometers, and elasticity gauges, all managed by our certified quality control team. Fully compliant with ISO 9001 and IATF 16949 certifications, we ensure reliable, high-performance manufacturing. Additionally, automation systems like AutoDryers, high-speed doming machines, and precision die-cutting technology further enhance productivity, precision, and product quality, maintaining consistency throughout every stage of production.
