Ra0.6 High Polished Mold Core Pins

Precision Core Pins for Plastic Injection Moulded Components

Product Overview

Our Ra0.6 High Polished Mold Core Pins are precision components designed for plastic injection molds requiring:

• Smooth surface finish

• Stable dimensional accuracy

• Reliable demolding performance

• Long service life

Manufactured using high-precision CNC machining and precision grinding equipment, these core pins ensure excellent interchangeability and consistent performance in multi-cavity injection molds.

All components are produced strictly according to customer drawings (OEM / Built-to-Print).

Key Technical Specifications

Material: 1.2343 (H11 hot work tool steel)
Hardness: 43–48 HRC (custom heat treatment available)
Surface Roughness: Ra0.6 (high polished finish)
Tolerance: ±0.01 mm
Axiality: 0.005 mm
Verticality: 0.005 mm
Surface Treatment Options:

• TiN

• TiCN

• DLC

• Nitriding

• Black oxide

• Other custom coatings

Why Surface Finish Ra0.6 Matters

Core pins directly form internal features of plastic parts. Surface roughness affects:

• Demolding smoothness

• Product surface quality

• Flash and burr formation

• Wear resistance

• Mold life

Ra0.6 high polish provides:

• Reduced friction during ejection

• Lower risk of plastic sticking

• Improved cosmetic appearance

• Stable molding cycle performance

For higher cosmetic requirements, mirror polishing can be evaluated.

Engineering & Machining Focus

Precision core pins require strict geometric control.

1) Diameter & Form Grinding Accuracy

• Precision OD grinding

• Tight diameter tolerance control

• Stable concentricity

• Consistent repeatability

Close form-ground tolerance up to ±0.005 mm upon request.

2) Straightness & Axiality Control

Slender core pins require:

• Controlled machining stress

• Step-by-step grinding process

• Careful heat treatment management

This prevents bending and ensures long-term geometric stability.

3) Surface Treatment for Wear Resistance

For high-cycle molds, we offer optional coatings:

• TiN (general wear resistance)

• TiCN (higher hardness, lower friction)

• DLC (excellent lubricity and anti-adhesion)

• Nitriding (surface hardness improvement)

These treatments extend mold life and reduce maintenance frequency.

Applications

Our high polished core pins are widely used in:

• Medical injection molds

• Cosmetic packaging molds

• Bottle cap molds

• Electronic housing molds

• Precision multi-cavity packaging molds

Suitable for parts requiring smooth internal surfaces and tight dimensional control.

Manufacturing Capabilities

Processing equipment includes:

• High-precision CNC machining centers

• OD grinding machines

• ID grinding machines

• Surface grinding machines

• Sodick EDM

• Wire-cut machines

• Precision polishing equipment

We manufacture core pins, cavity pins, ejector sleeves, punches, and other precision mold components.

Quality Control

Inspection equipment:

• CMM (Coordinate Measuring Machine)

• Height gauges

• Hardness tester

• Surface roughness tester

Quality control procedures:

• Material verification

• In-process inspection

• Final dimensional inspection

• Surface roughness verification

All parts are 100% inspected before shipment.

OEM & Custom Manufacturing

We support:

• Manufacturing from 2D / 3D drawings

• Non-standard custom core pins

• Replacement mold components

• Small batch and mass production

• Confidential project handling (NDA available)

MOQ: 1 piece
Standard production time: approx. 10 working days (depending on quantity and complexity)
Sample production: approx. 7 days

Packaging & Shipping

Packaging:

• Anti-corrosion oil coating

• Carton box packaging

• Protective cushioning

Shipping methods:

• DHL

• FedEx

• TNT

• Air freight

• Sea freight

Why Choose Our Core Pins

• Specialized manufacturer of precision mold components

• Experienced technical team

• Advanced grinding capability

• Stable dimensional control

• Competitive pricing

• Fast delivery

Ordering Process

1. Submit drawings or samples

2. Technical evaluation

3. Same-day quotation (in most cases)

4. 50% deposit to start production

5. Final inspection & balance payment

6. Shipment according to customer requirements

Request a Quotation

To receive a quotation, please provide:

• 2D / 3D drawings

• Material specification

• Surface finish requirement

• Tolerance requirement

• Order quantity

Our engineering team will review your project and provide a professional response within 24 hours.