Heat Treated SKD61 Cap Mold Inserts | Durable H13 Cores for Injection Molding

Product Overview

Senlan Precision manufactures heat-treated SKD61 mould core inserts designed for injection molds used in plastic bottle cap production. Produced strictly on a customized / OEM / Built-to-Print basis, these core inserts provide stable hardness, good thermal fatigue resistance, and reliable dimensional consistency for high-cycle cap molding applications.

Key Features & Technical Advantages

• SKD61 (H13 equivalent) tool steel, suitable for hot-working mold conditions

• Controlled vacuum or conventional heat treatment for stable hardness and toughness

• Good resistance to thermal cracking and cyclic stress

• Consistent dimensional accuracy for multi-cavity cap molds

• Compatible with surface finishing processes such as polishing or nitriding

• Manufactured strictly according to customer drawings and specifications

Application Scenarios / Industry Applications

• Plastic bottle cap injection molds

• Multi-cavity cap molds for high-volume production

• Packaging mold systems requiring stable core performance

• Mold refurbishment and replacement core inserts

• Injection molds for food-grade packaging components

Mold Structure & Design Description

SKD61 core inserts are typically installed in the core side of bottle cap molds, where they are exposed to repeated thermal cycling and mechanical load during injection molding. Proper heat treatment combined with precision machining ensures stable fit, reduced deformation, and consistent molded part quality across long production runs.

Manufacturing Capability & CNC Machining Capacity

Senlan Precision is equipped with advanced machining and finishing equipment to support high-accuracy mold components:

• MAKINO high-precision CNC machining centers (Japan)

• HARDINGE CNC lathes (USA)

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

• In-house or qualified external heat treatment control

Typical achievable tolerances range from ±0.003 mm to ±0.01 mm, depending on part geometry and technical requirements.

Custom Development / OEM Cooperation Process

1. Customer drawing and technical specification review

2. Material selection and heat treatment plan confirmation

3. CNC machining and intermediate inspection

4. Heat treatment and stress relief

5. Final precision machining and inspection

6. Packaging and export shipment

All projects follow a Built-to-Print OEM workflow without deviation from approved drawings.

Quality Control & Export Experience

• Raw material inspection and traceability

• Dimensional checks at key machining stages

• Hardness and visual inspection after heat treatment

• Final inspection before shipment

• Extensive export experience supplying mold components to international customers

Related Products Recommendation

• SKD61 mold core pins and inserts

• Threaded core inserts for bottle cap molds

• Mold cavity inserts and sleeves

• Multi-cavity mold spare parts

FAQ – Technical & Procurement

Q1: Why is SKD61 suitable for bottle cap mold core inserts?
SKD61 offers good heat resistance, toughness, and dimensional stability under repeated molding cycles.

Q2: Can hardness be specified by the customer?
Yes. Hardness ranges and heat treatment requirements are defined strictly according to drawings.

Q3: Do you support replacement cores for existing molds?
Yes. Replacement and refurbishment core inserts can be manufactured based on samples or drawings.

Q4: What tolerance levels can be achieved?
Typical tolerances range from ±0.003 mm to ±0.01 mm, depending on geometry.

Q5: Are surface treatments available?
Optional polishing or surface treatment can be applied based on application needs.

Get a Quote

For pricing, lead time, or technical evaluation of heat-treated SKD61 mould core inserts, please contact Senlan Precision with your drawings. Our engineering team will provide a detailed quotation and manufacturing assessment.