Uddeholm QRO 90 Supreme Core Pins | 46-48 HRC High-Performance Injection Mold Pins

Product Overview

QRO90 material precision mold core pins are high-performance injection molding components designed for demanding molding conditions requiring thermal stability and wear resistance. Manufactured by Senlan Precision, these injection molding pins are supplied strictly on a customized, built-to-print basis, with controlled hardness of 46–48 HRC, ensuring stable geometry, consistent cavity performance, and extended mould service life.

Core Features & Technical Advantages

• QRO90 Tool Steel Material
  Optimized for thermal fatigue resistance and dimensional stability in injection molding

• Controlled Hardness: 46–48 HRC
  Balanced wear resistance and toughness for long production cycles

• Precision CNC Machining
  Accurate diameter, concentricity, and straightness per technical drawings

• Custom / OEM Manufacturing
  All core pins produced strictly according to customer specifications

• Stable Performance in Multi-Cavity Moulds
  Supports consistent cavity formation and repeatable molding results

Application Scenarios / Industry Applications

• Plastic Injection Molding Moulds

• Bottle Cap and Closure Mould Systems

• Medical Packaging and Syringe Moulds

• High-Cycle Production Moulds

• Precision Mold Manufacturing Projects

These precision mold core pins are suitable for applications where heat resistance, dimensional accuracy, and repeatability are critical.

Mould Structure & Design Explanation

In injection molding moulds, core pins form internal features and directly influence part geometry, demolding behavior, and mould wear.
QRO90 material core pins are commonly selected for:

• Improved resistance to thermal stress during continuous molding

• Reduced deformation under repeated heating and cooling cycles

• Stable fit within mold cavities and inserts

• Extended maintenance intervals in high-volume production

Proper core pin design and material selection are essential to achieving consistent molding quality.

Manufacturing Capability & CNC Machining Capacity

Senlan Precision applies a controlled manufacturing process for precision mold core pins:

• CNC Turning & Milling for dimensional accuracy

• Precision Grinding for diameter and straightness control

• Heat Treatment to achieve 46–48 HRC hardness

• Optional EDM Processing for complex geometries

Typical capability:

• Diameter tolerance: according to drawing (±0.01 mm achievable)

• Concentricity and straightness: per application requirement

Custom Development / OEM Cooperation Process

1. Drawing Review & Technical Evaluation

2. Material & Heat Treatment Confirmation

3. Precision CNC Machining

4. In-Process and Final Quality Inspection

5. Batch Supply or Long-Term Production Support

This process supports both new mold development and replacement core pin production.

Quality Control & Export Experience

• ISO 9001 quality management system

• Material certification and hardness verification

• Dimensional inspection using calibrated measuring equipment

• Traceable production records for export projects

• Stable supply experience for international mold manufacturers

Inspection reports are available upon request.

Related Precision Mold Components (Internal Links)

• Precision Mold Core Inserts

• Injection Mold Cavities

• Mold Sliders and Guide Components

• Ejector Pins and Sleeves

• CNC Machined Mold Parts

Frequently Asked Questions (FAQ)

Q1: Are these QRO90 core pins standard parts?
A: No. All core pins are custom manufactured based on customer drawings.

Q2: Why choose QRO90 material for injection molding pins?
A: QRO90 offers good thermal fatigue resistance and dimensional stability for demanding molding conditions.

Q3: Can hardness be adjusted outside 46–48 HRC?
A: Yes, subject to technical evaluation and application requirements.

Q4: Are small batch or prototype orders supported?
A: Yes. Both prototype and production orders are accepted.

Request a Quotation

For QRO90 precision mold core pins, custom injection molding pins, or OEM mold components manufactured to drawing, please contact Senlan Precision with your technical specifications.
Our engineering team will review your requirements and provide a detailed quotation.