Premium QRO 90 Die Casting Core Pins | High-Precision EDM Ra 0.6 Finish

Product Overview

QRO 90 high pressure die casting mold core pins are precision components designed for injection and die casting mold systems requiring high thermal stability, toughness, and controlled surface finish. Manufactured using CNC machining, EDM processing, and fine polishing, these core pins achieve a surface roughness of Ra 0.6 while maintaining stable dimensional accuracy. All components are custom produced strictly according to customer drawings and technical specifications.

Key Features & Technical Advantages

• Manufactured from QRO 90 hot work tool steel

• Designed for high pressure die casting (HPDC) mold applications

• Precision EDM processing with Ra 0.6 surface finish

• Excellent resistance to thermal fatigue and heat checking

• Stable dimensional accuracy under high thermal and mechanical loads

• Consistent surface quality for reliable molding and demolding

• Fully customized / OEM / Built-to-Print manufacturing

Applications & Industries

These QRO 90 core pins are widely used in:

• Injection molds for packaging caps and closures

• Mold systems for bottle caps and sealing components

• Medical tooling and precision mold systems

• Industrial molds operating under high pressure and temperature

They are particularly suitable for applications requiring high thermal stability, smooth surface finish, and repeatable mold performance.

Mold Structure & Design Description

Core pins manufactured from QRO 90 are installed on the core side of injection and die casting molds to form internal product geometry.
Key design considerations include:

• Accurate pin diameter, straightness, and tip geometry

• EDM-machined functional areas with controlled surface roughness

• Proper fit and alignment within multi-cavity mold assemblies

• Structural strength to withstand high injection pressure

All core pins are designed and manufactured strictly according to customer drawings to ensure correct assembly and stable mold operation.

Manufacturing Capability & CNC Machining

Senlan Precision manufactures QRO 90 mold core pins using advanced CNC machining, EDM, and finishing technologies.
Our production facilities are equipped with high-precision machining centers and CNC systems from MAKINO (Japan) and HARDINGE (USA), along with precision EDM equipment, enabling:

• Accurate CNC machining for core pin geometry

• Controlled EDM processing for fine surface features

• Surface roughness control down to Ra 0.6

• Reliable repeatability across production batches

Machining routes are selected based on part geometry, surface requirements, and mold function.

Custom Manufacturing & OEM Cooperation

We specialize in custom manufacturing and OEM cooperation, supporting:

• Built-to-Print production from 2D drawings or 3D models

• Customized core pin geometry and functional features

• EDM finishing and surface quality control per specification

• Small-batch prototyping and volume production

• Long-term supply of replacement and spare mold components

Technical communication is maintained throughout the project to ensure accurate execution of customer requirements.

Quality Control & Export Experience

With over 20 years of experience in exporting precision mold components, Senlan Precision operates a structured quality control system:

• Incoming material inspection and traceability

• In-process dimensional inspection during CNC and EDM machining

• Surface roughness inspection for Ra requirements

• Final inspection prior to shipment with complete documentation

We are experienced in international technical communication, quality expectations, and export packaging standards.

Related Mold Components

• High pressure die casting mold core pins

• Mold cavity inserts

• EDM-finished mold inserts

• Multi-cavity mold spare parts

All related products are available on a custom manufacturing basis.

Technical FAQ

Q1: Are QRO 90 core pins manufactured strictly according to drawings?
Yes. All core pins are produced strictly based on customer-provided drawings and specifications.

Q2: What is the advantage of QRO 90 material for HPDC core pins?
QRO 90 offers excellent toughness, thermal stability, and resistance to heat checking, making it suitable for high-pressure mold applications.

Q3: How is Ra 0.6 surface roughness achieved?
Ra 0.6 is achieved through controlled EDM processing followed by fine surface finishing.

Q4: Can these core pins be supplied as replacement parts for existing molds?
Yes. Replacement and interchangeable core pins can be manufactured to match existing mold designs.

Request a Quotation

For pricing, lead time, or technical discussion regarding QRO 90 high pressure die casting mold core pins with Ra 0.6 EDM finish, please provide your drawings or technical specifications.
Our engineering team will review your requirements and provide a professional quotation accordingly.