H13 Hot Work Steel Mold Cores | Precision Inserts for Consumer Plastic Tooling

Product Overview

Senlan Precision supplies hot work die steel mold core inserts designed for injection molding tooling used in daily-use plastic products. These core inserts are manufactured on a strict Built-to-Print (OEM) basis, focusing on thermal stability, wear resistance, and dimensional consistency under long production cycles and elevated processing temperatures.

Key Features & Technical Advantages

• Hot work die steel grades suitable for high-temperature injection molding environments

• Excellent resistance to thermal fatigue and softening

• Stable hardness after heat treatment for extended mold life

• Precision CNC machining ensures tight tolerances and repeatability

• Optimized surface finish to support smooth material flow and demolding

• Compatible with single-cavity and multi-cavity mold structures

Application Scenarios / Industry Applications

• Daily-use plastic injection molds

• Bottle caps, closures, and container components

• Packaging-related plastic molding systems

• High-cavity production molds requiring thermal stability

• Replacement or maintenance mold core components

Mold Structure & Design Description

In injection molding systems, the mold core insert directly defines internal geometries and experiences repeated thermal cycling. Hot work die steel provides the required balance between strength and toughness to maintain dimensional accuracy under continuous heating and cooling. Senlan Precision manufactures core inserts to integrate precisely with existing mold bases and cavity layouts, ensuring stable performance throughout production.

Manufacturing Capability & CNC Machining Capacity

Senlan Precision is equipped with advanced machining and finishing systems:

• MAKINO high-precision CNC machining centers (Japan)

• HARDINGE CNC turning equipment (USA)

• CNC milling, turning, grinding, and EDM processes

• Controlled heat treatment to achieve consistent hardness and internal structure

Typical dimensional tolerances can be controlled within ±0.003 mm to ±0.01 mm, depending on part geometry and application requirements.

Custom Development / OEM Cooperation Process

1. Review of drawings, tolerances, and molding conditions

2. Material grade and heat treatment specification confirmation

3. Precision CNC machining and in-process inspection

4. Heat treatment and dimensional stabilization

5. Final dimensional and visual inspection

6. Export packaging and shipment

All production follows a Built-to-Print OEM workflow.

Quality Control & Export Experience

• Raw material inspection and traceability

• In-process dimensional and hardness checks

• Final inspection for critical features and tolerances

• Stable export experience supplying precision mold components to global customers

Related Products Recommendation

• Mold cavity inserts and core pins

• Precision mold sleeves and bushings

• Multi-cavity mold spare components

• Custom EDM-processed mold parts

FAQ – Technical & Procurement

Q1: Is hot work die steel suitable for injection molding applications?
Yes. It is widely used where thermal stability and resistance to heat cycling are required.

Q2: Can the core insert be customized by drawing?
Yes. All parts are produced strictly according to customer drawings or specifications.

Q3: What tolerances can be achieved?
Typical tolerances range from ±0.003 mm to ±0.01 mm, depending on design complexity.

Q4: Do you support multi-cavity mold applications?
Yes. Core inserts are suitable for both single-cavity and multi-cavity molds.

Q5: Can you supply small batches or trial orders?
Yes. Prototype, pilot, and mass production are all supported.

Get a Quote

To receive a technical evaluation and quotation for hot work die steel mold core inserts for injection molding tooling, please contact Senlan Precision with your drawings or specifications. Our engineering team will respond with a detailed manufacturing proposal.