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SKD61 Mold Base with Copper Heat Conduction Insert
- Material: Frame: SKD61 Hot Work Tool Steel; Heat Insert: C11000 Pure Red Copper
- Hardness: SKD61 HRC 48–52; Copper HB 80–90
- Tolerance: ±0.002 mm for copper insert fitting and plate mounting surfaces
- Surface Finish: Precision ground steel frame, finely milled copper heat channel profiles
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High-Precision Engineering
Split composite structure combines the structural rigidity of SKD61 steel and ultra-high thermal conductivity of copper. The shaped copper insert fits closely to the product forming area, rapidly dissipating melt heat away from the cavity. Standardized mounting hole positions enable direct installation onto standard mold frames. Bolt-locked steel frame provides robust clamping resistance against high injection pressure, preventing copper insert deformation under molding load.
Material Performance Comparison
SKD61 Steel Frame
- Excellent thermal fatigue and impact toughness to withstand repeated mold opening/closing impact and high temperature cycling
- High structural hardness to bear clamping force and external mold assembly loads
- Stable dimensional precision with low thermal expansion to maintain overall mold plate geometry
Pure Red Copper Heat Insert
- 4–5 times higher thermal conductivity than mold steel, accelerating cavity cooling speed
- Flexible milling for complex contour matching to fit irregular product forming zones
- Fast heat equalization to eliminate hot spots that cause shrinkage, warpage and surface defects
Modular Customizable Structure
- Custom copper insert contour, layout and thickness matching product cavity shapes
- Adjustable mold base outer dimensions, bolt hole patterns and locating step sizes
- Optional surface treatments: ion nitriding for steel frame sliding faces, passivation for copper anti-oxidation
- Single-cavity and multi-cavity composite insert layouts available
Key Features & Advantages
- Fast Cycle Cooling: Copper inserts drastically shorten cooling periods, boosting hourly production output.
- Uniform Mold Temperature: Eliminates local hot spots to improve molded part dimensional consistency and appearance quality.
- Strong Structural Stability: SKD61 rigid frame protects soft copper inserts from pressure deformation.
- Composite Cost Balance: Only high-heat zones use expensive copper, lowering total mold cost vs full copper blocks.
Technical Specifications
| Parameter | Specification |
|---|---|
| Frame Material | SKD61 Hot Work Tool Steel |
| Heat Conduction Insert | C11000 High-Purity Red Copper |
| SKD61 Heat Treated Hardness | HRC 48–52 |
| Insert Fit Tolerance | ±0.002mm |
| Mold Base Flatness & Perpendicularity | ≤0.003mm |
| Surface Roughness | Ra ≤0.06μm (Steel Ground), Ra ≤0.08μm (Copper Milled) |
| Manufacturing Processes | 5-Axis CNC Milling, Hardening & Tempering, Interference Press Fitting |
| Surface Treatments | Ion Nitriding (Steel), Anti-Oxidation Passivation (Copper) |
| Customization | 100% Supported via CAD Drawings & Samples |
Applications
Automotive Manufacturing
Used for cooling optimized mold bases of automotive plastic structural parts and small aluminum die castings; fast heat dissipation supports high-volume continuous production of auto components.
Medical Production Molding
Applied in injection mold bases for rigid medical device housings and disposable fitting parts; steel frame can be upgraded to S136 when molding corrosive medical resins.
Consumer Electronics Fabrication
Deployed for thin-wall electronic housing and miniature connector mold assemblies; uniform cooling prevents thin electronic plastic shells from warping and deformation.
General Plastic Packaging
Ideal for high-speed packaging container and cap mold bases, shortened cooling cycles raise throughput for mass packaging production lines.
Industrial Precision Component Molding
Utilized for composite cooling mold plates of general industrial plastic and low-pressure metal molded parts, balancing structural strength and heat exchange efficiency.
