Customize Precision Polished Die Steel Mold Core Plate

For Hot Runner Plastic Injection Mold Tooling

Product Overview

Our custom precision polished die steel mold core plates are designed for hot runner plastic injection molds used in high-cycle and multi-cavity production.

The mold core plate is a critical structural component in injection mold assemblies.
It supports the core inserts, ensures alignment with cavity plates, and provides structural stability under clamping pressure and injection force.

All core plates are manufactured strictly according to customer drawings and assembly requirements.

Typical Applications

This mold core plate is widely used in:

• Hot runner injection molds

• Multi-cavity packaging molds

• Automotive plastic component molds

• Household appliance molds

• Thin-wall container molds

• Electronic product injection tooling

Suitable for both 2-plate and 3-plate mold structures.

Material Options

Common mold plate materials include:

• P20

• 1.2738

• 718

• 1.2343 / 1.2344

• S136

• Custom tool steel grades

Material selection depends on:

• Injection pressure

• Mold size

• Cycle time

• Required mold life

Heat treatment can be applied upon request.

Engineering Focus

In hot runner molds, the core plate must maintain:

• Flatness

• Parallelism

• Structural rigidity

• Accurate hot runner positioning

Performance depends on machining precision and stress control.

1) Flatness & Parallelism Control

• Precision surface grinding

• Controlled stress relief before finishing

• Final finishing after heat treatment (if required)

Ensures even clamping force distribution and stable mold alignment.

2) Hot Runner Interface Accuracy

• Accurate machining of nozzle seating areas

• Controlled depth of manifold pockets

• Precise alignment of runner channels

Critical to prevent leakage and ensure consistent melt flow.

3) Surface Polishing Quality

Polished surfaces:

• Improve sealing contact

• Reduce contamination risk

• Enhance assembly precision

Surface finishing options include fine grinding or polishing according to customer requirements.

Manufacturing Capability

Processing equipment includes:

• High-speed CNC machining centers

• Precision milling machines

• Surface grinders

• EDM and wire cutting

• CMM inspection systems

Typical machining tolerance:

• General tolerance: ±0.01 mm (depending on plate size)

• Critical features: tighter control upon request

Large plate sizes up to:

2500 mm × 2000 mm × 1500 mm

Mold Structure Integration

The mold core plate works together with:

• Cavity plates

• Back plates

• Ejector plates

• Retainer plates

• Spacer blocks

• Guide pillars and bushings

Proper machining ensures correct alignment between movable and fixed sides of the mold.

Quality Control

Each mold core plate undergoes:

• Raw material verification

• Dimensional inspection

• Flatness and parallelism measurement

• Assembly feature inspection

• Final quality check before shipment

Inspection reports can be provided if required.

OEM / Built-to-Print Manufacturing

We support:

• 2D / 3D file formats (IGS, STP, STL, X-T, etc.)

• Single plate or full mold base production

• Small batch and mass production

• Replacement plates for existing molds

All products are manufactured on a strict OEM / Built-to-Print basis.

Related Products

To complete hot runner mold assemblies, we also supply:

• Mold cavity plates

• Mold back plates

• Ejector plates and retainer plates

• Precision core inserts

• Hot runner nozzle seat inserts

• Multi-cavity mold components

All components are fully compatible with hot runner mold systems.

Technical FAQ

Q1: Can large-size core plates be machined?
Yes. We support large mold plate machining up to 2500 mm length.

Q2: Is heat treatment available?
Yes. Pre-hardened or heat-treated materials can be supplied based on requirements.

Q3: What flatness tolerance can be achieved?
Flatness depends on size and thickness. Tight tolerances can be controlled through precision grinding.

Q4: Do you manufacture according to HASCO or DME standards?
Yes. Mold plates can be produced according to international mold base standards.

Delivery & Business Terms

• MOQ: 1 piece

• Lead time: typically 7–15 days depending on size and complexity

• Shipping: DHL, FedEx, UPS, TNT, Sea freight

• Payment: T/T, L/C

Request a Quotation

To receive a technical quotation, please provide:

• 2D or 3D drawings

• Material specification

• Plate size and thickness

• Heat treatment requirement

• Application type (hot runner / multi-cavity / packaging, etc.)

• Quantity and delivery schedule

Our engineering team will review your specifications and provide a detailed manufacturing proposal.