IATF 16949 Precision CNC S136 Steel Mold Insert Core High Hardness Mirror Polished Plastic Injection Cavity Block Southeast Asian Tooling Maker
Product Spotlights
As a professional manufacturer based in Changzhou, Jiangsu, China, Changzhou Hongxinyutai Precision Mold Co., Ltd. specializes in high-precision injection mold components. With over 7 years of experience since 2017, our factory spans 1,000–3,000 square meters and employs 51–100 skilled workers. We are proud to offer the IATF 16949 Precision CNC S136 Steel Mold Insert Core — a product designed for demanding plastic injection applications. This cavity block combines extreme hardness with mirror polish, ensuring long mold life and superior part quality. Our tooling is trusted by automotive, medical, and consumer electronics clients across North America, Europe, Southeast Asia, and beyond.
The core insert is manufactured from premium S136 stainless steel, known for its excellent corrosion resistance and dimensional stability. Through precision CNC machining and heat treatment, we achieve a hardness of 48–52 HRC, which resists wear and deformation under high injection pressures. The cavity block is then meticulously polished to a mirror finish (Ra ≤ 0.01 μm), reducing friction and ensuring flawless release of molded parts. This product is ideal for producing high-gloss plastic components with tight tolerances.
Key Features & Benefits
- Material: S136 ESR stainless steel — excellent corrosion resistance and stable heat treatment response.
- Hardness: 48–52 HRC — high wear resistance for extended mold life in high-volume production.
- Surface Finish: Mirror polished to Ra ≤ 0.01 μm — reduces mold release issues and improves part surface quality.
- Precision CNC Machining: Tolerances up to ±0.005 mm — ensures consistent cavity dimensions and part interchangeability.
- IATF 16949 Certified: Our production system meets automotive quality management standards, ensuring traceability and reliability.
- Heat Treatment: Vacuum hardened and cryogenically treated for maximum dimensional stability.
- Customizable: We accept custom shapes, sizes, and cooling channel designs per your mold drawing.
- Fast Lead Time: Typical production cycle of 15–20 working days for standard sizes.
Technical Specifications
| Parameter | Value |
|---|---|
| Steel Grade | S136 (AISI 420 modified) |
| Hardness (HRC) | 48–52 (customer-requested hardness available) |
| Surface Roughness | Ra ≤ 0.01 μm (mirror finish) |
| Machining Tolerance | ±0.005 mm (typical) |
| Heat Treatment | Vacuum hardening + cryogenic treatment |
| Certification | IATF 16949:2016 |
| Max Size | Up to 500 × 500 × 300 mm (custom sizes available) |
| Application | Automotive, medical, electronics, household |
Why Choose Our Mold Insert Core?
This precision CNC S136 steel mold insert core is engineered to meet the rigorous demands of high-volume plastic injection molding. The combination of high hardness and mirror polish significantly reduces cycle time and maintenance costs. Our IATF 16949 certification ensures that every step — from raw material sourcing to final inspection — follows strict quality control procedures. We offer customizable solutions including different hardness levels, surface finishes, and cooling channel layouts to optimize your mold performance.
Whether you are a tooling shop in Southeast Asia or a global automotive tier supplier, our mirror polished cavity block provides consistent, reliable performance. We ship from Jiangsu, Shanghai, and Shenzhen ports with typical lead times of 15–20 days. Our team of 50+ experienced technicians and engineers is ready to support your project with free design advice and DFM (Design for Manufacturing) analysis.
Frequently Asked Questions
-
Q: What is the typical hardness range for this insert?
A: Standard hardness is 48–52 HRC. We can adjust the hardness between 40–56 HRC upon request to match your specific application. -
Q: Can you provide mirror polishing for complex cavity shapes?
A: Yes, our skilled polishers can achieve mirror finish (Ra ≤ 0.01 μm) on complex 3D surfaces using advanced hand-polishing and ultrasonic techniques. -
Q: Is the material supplied with a material certificate?
A: Absolutely. Each batch of S136 steel comes with a mill test certificate, and we also perform in-house spectrometric analysis for traceability. -
Q: Do you offer custom cooling channel designs?
A: Yes, we can design and machine conformal cooling channels according to your mold flow analysis requirements to improve cooling efficiency. -
Q: What is the minimum order quantity (MOQ)?
A: MOQ is 1 piece for standard sizes. For custom designs, please contact us with your drawing for a quotation. -
Q: How do you ensure the insert fits perfectly into the mold base?
A: We use coordinate measuring machines (CMM) to verify critical dimensions, and we also offer trial assembly if needed. -
Q: What is the typical lead time for a custom insert?
A: Lead time is 15–20 working days for standard sizes; complex custom inserts may take 20–25 days. Rush orders are possible. -
Q: Do you provide warranty for the mold insert core?
A: Yes, we provide a 12-month warranty against material defects and workmanship. We also offer after-sales technical support.
Contact us today to discuss your mold insert requirements. Our team is dedicated to delivering high-quality, cost-effective tooling solutions for your plastic injection projects.
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