Stavax Steel Core Pins

Precision EDM Mold Components for Medical Needle Injection Molding

Product Overview

Our Stavax Steel Core Pins are precision mold components specially designed for medical needle, micro-tube, and cosmetic applicator injection molds.

Manufactured from Stavax ESR stainless mold steel, these core pins are processed using high-precision EDM and CNC machining to achieve:

• Micro-scale internal geometries

• Sharp transitions

• Deep cavity features

• Tight dimensional control

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

These components are widely used in high-precision medical injection molds where corrosion resistance, dimensional stability, and micro-feature accuracy are critical.

Material – Stavax ESR Stainless Mold Steel

Stavax ESR is a premium stainless mold steel known for:

• Excellent corrosion resistance

• High polishability

• Good wear resistance

• Stable hardness after heat treatment

• Clean microstructure due to ESR remelting

It is particularly suitable for:

• Medical injection molds

• Cosmetic packaging molds

• High-humidity molding environments

• Transparent or high-appearance plastic parts

Typical Applications

Our Stavax EDM core pins are used in:

• Medical needle molds

• Micro cannula molds

• Syringe component molds

• Cosmetic needle applicator molds

• Micro tube injection molds

• High-cavity precision medical tooling

These applications require extremely fine internal features and stable geometric control.

Engineering & Processing Focus

Medical needle mold components require strict control in three key areas:

1) Micro Geometry & EDM Machining

EDM (Electrical Discharge Machining) is used for:

• Micro internal cavities

• Sharp corners

• Thin wall features

• Deep narrow profiles

• High aspect ratio structures

EDM allows precision where traditional cutting tools cannot achieve the required geometry.

2) Dimensional & Geometric Accuracy

Key controlled parameters include:

• Concentricity

• Straightness

• Diameter accuracy

• Tip geometry precision

Tolerance capability:

Up to ±0.002 mm (depending on geometry)

Long and slender core pins are processed with controlled grinding and stress-relief techniques to prevent deformation.

3) Surface Integrity & Finish

Surface finishing options:

• Controlled EDM finish

• Secondary fine grinding

• Optional polishing

Surface integrity is important for:

• Smooth demolding

• Reduced material sticking

• Stable plastic flow

• Clean medical-grade molding conditions

Manufacturing Capability

Equipment includes:

• High-precision CNC turning centers

• CNC milling machines

• Sinker EDM machines

• Wire EDM systems

• Precision OD grinding machines

• CMM inspection systems

Processing workflow:

1. Material verification

2. CNC rough machining

3. EDM fine profile machining

4. Precision grinding

5. Final dimensional inspection

All processes are controlled in-house.

Quality Control

Inspection equipment:

• CMM (Coordinate Measuring Machine)

• Hardness tester

• Concentricity measurement systems

• Surface roughness tester

Quality procedures:

• Incoming material traceability

• In-process EDM dimensional verification

• Final geometric inspection

• Measurement reports available upon request

OEM / Built-to-Print Manufacturing

We support:

• Manufacturing from 2D / 3D drawings

• Reverse engineering from samples

• Prototype production

• Small batch and mass production

• Replacement mold core pins

MOQ: 1 piece
Lead time: 7–20 days depending on complexity
Drawing formats: PDF, DWG, DXF, IGS, STEP

Related Products

We also manufacture:

• Medical mold cavity inserts

• Stainless steel mold sleeves

• Micro core pins

• Multi-cavity medical mold components

• Corrosion-resistant mold spare parts

• Precision EDM mold inserts

All parts are custom manufactured according to customer requirements.

Frequently Asked Questions

Q1: Why is EDM necessary for medical needle core pins?
EDM enables accurate machining of micro features, sharp edges, and deep narrow cavities that cannot be reliably produced by conventional cutting methods.

Q2: Is Stavax suitable for medical injection molds?
Yes. Stavax ESR provides excellent corrosion resistance and dimensional stability for medical and cosmetic molding environments.

Q3: Can you control straightness for long slender pins?
Yes. Precision grinding and stress-control processes are used to maintain geometric stability.

Q4: Do you support prototype orders?
Yes. Prototype, low-volume, and mass production are all supported.

Request a Technical Quotation

Please provide:

• 2D / 3D drawings

• Material requirement

• Tolerance specification

• Surface finish requirement

• Quantity

Our engineering team will review your project and provide a detailed technical quotation within 24 hours.