Custom S136 Mold Cores | Precision Inserts for Daily Packaging Plastic Parts

Product Overview

Senlan Precision supplies non-standard S136 die steel core inserts engineered for injection mold tooling used in daily packaging plastic parts. Manufactured strictly on a Built-to-Print (OEM) basis, these core inserts focus on dimensional stability, corrosion resistance, and consistent cavity performance in high-cycle, multi-cavity molds.

Key Features & Technical Advantages

• S136 stainless mold steel with high corrosion resistance

• Suitable for humid or aggressive molding environments

• Stable hardness after heat treatment for long service life

• High dimensional accuracy for complex, non-standard geometries

• Excellent surface finish after grinding, polishing, or EDM

• Designed for multi-cavity and high-output injection molds

Application Scenarios / Industry Applications

• Daily packaging plastic parts injection molds

• Bottle caps, closures, and sealing components

• High-cavity molds requiring corrosion-resistant cores

• Packaging mold refurbishment and spare parts replacement

• Injection tooling operating under continuous production cycles

Mold Structure & Design Description

The S136 core insert forms the functional cavity geometry inside the injection mold. For non-standard designs, insert geometry, venting, and mating surfaces are optimized according to customer drawings. The corrosion-resistant properties of S136 help maintain cavity integrity, reduce surface degradation, and ensure consistent part quality during long production runs.

Manufacturing Capability & CNC Machining Capacity

Senlan Precision operates a complete in-house machining workflow, including:

• MAKINO CNC machining centers (Japan)

• HARDINGE CNC lathes (USA)

• CNC milling, turning, EDM, surface and internal grinding

• Controlled vacuum heat treatment and stress relief

Typical achievable tolerances range from ±0.003 mm to ±0.01 mm, depending on insert size and structure.

Custom Development / OEM Cooperation Process

1. Drawing and technical specification review

2. Material selection and heat treatment confirmation

3. Precision CNC machining and EDM processing

4. Heat treatment and dimensional stabilization

5. Grinding, polishing, and final inspection

6. Packing and export shipment

All core inserts are produced strictly according to customer drawings or samples.

Quality Control & Export Experience

• Incoming S136 material inspection and traceability

• In-process dimensional and surface checks

• Hardness and microstructure verification after heat treatment

• Final inspection before shipment

• Stable export experience serving international mold manufacturers

Related Products Recommendation

• Mold core pins and core sleeves

• Threaded core inserts

• Ejector pins and ejector sleeves

• Multi-cavity mold spare components

FAQ – Technical & Procurement

Q1: Why is S136 suitable for packaging mold core inserts?
S136 offers excellent corrosion resistance and dimensional stability, making it suitable for high-humidity and long-cycle molding environments.

Q2: Do you manufacture strictly to drawings?
Yes. All parts are produced on a Built-to-Print (OEM) basis only.

Q3: What surface finishes are available?
Grinding, mirror polishing, EDM texture, or finishes specified on drawings.

Q4: Can these inserts be used in multi-cavity molds?
Yes. They are commonly used in high-cavity packaging molds.

Q5: Do you support small batch or trial orders?
Yes. Prototype, pilot, and mass production are all supported.

Get a Quote

For pricing and technical evaluation of non-standard S136 die steel core inserts for injection mold tooling, please contact Senlan Precision with your drawings or specifications. Our engineering team will provide a detailed OEM manufacturing solution.