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718H Pre-Hardened Mold Steel Multi-Cavity Injection Mold Base Plate
This two-piece stacked mold base plate is 5-axis CNC precision machined from premium 718H pre-hardened mold steel, equipped with multi-spec cavity pin holes, full-length cooling circuit channels, standard mold mounting through holes and side positioning locking steps. It serves as the core carrier base for multi-cavity precision plastic injection molds.
- Material: 718H Pre-Hardened Mold Steel
- Hardness: HRC 28–32
- Tolerance: ±0.003 mm
- Surface Finish: Fine Precision Milled Matte Surface
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High-Precision Multi-Cavity Mold Base Engineering
Central recessed multi-cavity mounting platform with distributed stepped pin holes realizes simultaneous forming of multiple small plastic parts in one molding cycle, greatly boosting production efficiency. Horizontal full-length cooling channels run through the lower plate to form a full-perimeter uniform cooling network, eliminating local hot spots and reducing part warpage, bubbles and shrinkage defects. Perimeter positioning steps and four-corner large mounting holes are machined with ultra-tight positional tolerance, ensuring zero offset alignment after repeated mold opening and clamping operations.
Dual-layer integrated split plate structure adopts thickened rigid main body, resisting bending deformation under high injection clamping pressure to maintain stable dimensional consistency of multi-cavity finished products during long-term mass production.
Balanced Toughness 718H Pre-Hardened Mold Steel Construction
718H pre-hardened mold steel delivers comprehensive performance advantages for multi-cavity mold base plates:
- Pre-hardened delivery without secondary heat treatment, shortening mold manufacturing cycle
- Balanced hardness and impact toughness, resistant to fatigue cracking under long-cycle repeated clamping impact
- Excellent machinability for dense array of pin holes and long cooling flow channels, reducing processing cost
- Superior polishability and texture etching compatibility to support diversified surface requirements of plastic products
- Stable thermal conductivity for balanced mold temperature control across all multi-cavity zones Ideal for medium-volume mass production of small electronic parts, cosmetic fittings and miniature structural plastic components.
Custom Mold Base Engineering Support
- Custom overall plate dimensions, multi-cavity layout, pin hole distribution and cooling channel path based on customer 2D/3D CAD drawings
- Optional surface upgrades: Mirror Polishing, Chemical Texture Etching, Gas Nitriding Anti-Wear Treatment
- DFM mold flow consultation: cooling circuit optimization, cavity layout balance, shrinkage compensation design
- Fast prototype mold base sampling and large-batch mass production delivery
Key Features & Advantages
- Multi-Cavity Integrated Layout: Central dense hole platform supports multi-part synchronous molding to raise production throughput significantly.
- Full-Length Uniform Cooling Channels: Through-type horizontal cooling passages balance temperature across all cavities to cut reject rates.
- Rigid Anti-Deformation Dual-Plate Structure: Thick stacked mold base withstands high injection pressure without cavity deflection.
- Perimeter Positioning Step Design: Built-in side locating shoulders simplify mold assembly and guarantee repeatable alignment accuracy.
- Fully Customizable Cavity Layout: Adjust hole quantity, hole size and cooling channel layout to match customer unique multi-cavity molding demands.
Technical Specifications
| Parameter | Specification |
|---|---|
| Base Mold Material | 718H Pre-Hardened Mold Steel |
| Alternative Materials | P20, S136 Stainless Mold Steel, NAK80 Mirror Mold Steel |
| Hardness | HRC 28–32 (As-delivered pre-hardened) |
| Dimensional Tolerance | ±0.003mm for hole position, plate thickness & flatness |
| Flatness | ≤0.004mm per 100mm plate length |
| Machined Surface Roughness | Ra ≤1.6μm precision milled finish |
| Manufacturing Processes | 5-Axis CNC Milling, Deep Hole Drilling, Precision Deburring, Surface Grinding |
| Surface Treatments | Mirror Polishing, Texture Etching, Gas Nitriding, PVD Hard Coating |
| Customization | 100% Fully Customized via CAD Drawings & Product Samples |
Applications
Consumer Electronics Miniature Components
Used as multi-cavity mold base plates for charger pins, wireless earphone small structural shells and connector plastic fittings. Dense uniform cooling ensures consistent dimensional precision for tiny thin-wall electronic plastic parts.
Cosmetic Packaging Fittings
Applied to injection molding of cosmetic bottle caps, pump head small inserts and cosmetic tube plastic components. Multi-cavity layout improves packaging production efficiency, matte polished mold surface delivers flawless cosmetic product appearance.
Medical Disposable Plastic Parts
S136 stainless steel alternative variant meets medical hygiene standards, suitable for multi-cavity mold bases of medical instrument small plastic brackets and disposable medical consumable shells, resisting corrosion from medical plastic additives.
Household Small Plastic Parts
Ideal for daily-use plastic buttons, small appliance support feet and toy miniature structural parts. Stable rigid mold base extends service life for continuous high-volume household goods molding production.
Precision Automation Plastic Connectors
Deployed as multi-cavity mold base for sensor terminals and wiring connector plastic housings. Consistent cooling and high rigidity guarantee tight assembly tolerance for industrial precision plastic components.
