1. Product Overview
Our factory specializes in tailor-made Injection Mould development and TPU90 valve cover custom molding service. This valve cover component is injection molded with Shore 90A TPU raw material, paired with precision customized Injection Mould manufactured from S136 stainless mold steel at hardness HRC48-52. The Injection Mould adopts 1×16 sixteen-cavity layout, producing 16pcs valve covers per single molding shot to maximize production throughput. Mold cavity surface applies EDM machining with standard VDI20 mirror finish, equipped with professional submarine hidden gate structure plus reserved valve assembly positioning design inside the plastic part. We provide one-stop solution covering Injection Mould design, steel machining, mold trial and bulk TPU product injection molding, all finished Injection Mould undergo strict dimensional & surface inspection before shipment to secure long-term stable mass production.
2. Technical Specification Table
| Item | Detailed Parameter |
| Final Product | TPU90 Hardness Valve Cover Plastic Part |
| Molding Material | Shore 90A Thermoplastic Polyurethane(TPU90) |
| Injection Mould Cavity | 1*16 Multi Cavity Design |
| Mould Core/Cavity Steel | S136 Prehardened Stainless Steel |
| Mould Hardness | HRC 48~52 |
| Cavity Surface Treatment | EDM Machining + VDI20 Standard Mirror Finish |
| Gating System | Submarine Hidden Tunnel Gate |
| Structural Feature | Preformed Inner Structure for Valve Installation |
| Service Mode | OEM/ODM Custom Injection Mould + Molding |
![Valve Cover Injection Mould]( "Valve Cover Injection Mould")
3. Core Product & Mould Advantages
3.1 Premium S136 HRC48-52 Injection Mould
S136 stainless steel features excellent rust-proof, anti-corrosion and wear-resistant performance at HRC48-52 hardness, ideal for long-run TPU molding which generates slight corrosive volatile during injection. VDI20 mirror EDM finish delivers ultra-smooth part surface without post polishing, effectively reducing scratch, bubble and shrinkage defects on TPU valve cover.
3.2 1×16 High-Cavity Efficient Layout
Sixteen independent cavities in one set of Injection Mould, 16 finished valve covers per molding cycle, drastically shorten single production cycle and cut down unit manufacturing cost for large-volume orders, perfect for automated mass production.
3.3 Submarine Hidden Gate Design
Submarine tunnel gate auto-separates from finished part during ejection, no visible gate residue on valve cover outer surface; eliminate manual gate trimming procedure to save post-process labor cost, greatly improve product appearance consistency.
3.4 TPU90 Material Functional Benefit
Shore90 TPU owns outstanding elasticity, abrasion resistance and air tightness, making the valve cover have good buffer performance and reliable sealing effect after fitted with valve core, widely used in pneumatic & hydraulic valve assemblies.
3.5 Full Customization Available
We design whole set Injection Mould according to customers’ 2D/3D drawings or real samples, adjustable valve cover dimension, inner valve groove structure and cavity layout based on customized project requirements.
4. Application Fields of TPU90 Valve Cover
Pneumatic automation equipment valve end cap
Small hydraulic control valve sealing housing
Household appliance air pump & compressor valve accessory
Medical miniature valve protection cover
5. Custom Mould & Molding Service Process
Customer submit product drawing/sample →2. DFM feasibility analysis & Injection Mould structural design →3. CNC rough machining + EDM precision processing for S136 cavity, VDI20 mirror finishing →4. Submarine gate system & valve position structure fabrication + mould assembly →5. TPU90 trial injection & sample confirmation →6. Mass production after client sample approval
FAQ Section
Q1: What is the expected service life of this S136 VDI20 Injection Mould?
A: With regular maintenance, the S136 HRC48-52 Injection Mould can achieve over 650,000 stable molding shots for TPU90 valve cover continuous production.
Q2: Can you modify existing Injection Mould if client updates valve cover design?
A: Our in-house mold workshop provides professional mould revision service to adjust inner valve structure, outer dimension and wall thickness as updated technical drawings.
Q3: Is pre-production sample available before bulk molding?
A: Yes, free trial samples can be arranged after mould completion for your quality & dimension checking before formal mass order.
Q4: Can this 1*16 Injection Mould adapt different hardness TPU materials?
A: After fine-tuning injection parameters and minor gate optimization, the same mould can produce TPU ranging from Shore80A~95A upon our technical evaluation.
