±pm$0.002mm Precision Mold Core Pins & Cavity Inserts | CNC Grinding & EDM

Product Overview

Plastic mold core pins and cavity inserts are critical functional components used in injection molds to form precise part geometry and ensure stable molding performance. Manufactured through precision CNC machining combined with grinding and EDM processes, these mold parts deliver tight tolerances, consistent surface quality, and reliable dimensional accuracy. All components are custom manufactured according to customer drawings and application requirements.

Key Features & Technical Advantages

• Precision-manufactured core pins and cavity inserts for injection molds

• CNC machining combined with grinding and EDM processes

• High dimensional accuracy for critical mold features

• Consistent surface finish for stable molding and demolding

• Suitable for high-cavity and long-run mold applications

• Reliable interchangeability for replacement mold components

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

Applications & Industries

These plastic mold core pins and cavity inserts are widely used in:

• Injection molds for packaging caps and closures

• Mold systems for bottle caps and sealing components

• Medical packaging molds and syringe-related tooling

• Precision molds requiring stable cavity-to-cavity consistency

They are especially suitable for applications requiring high precision, repeatability, and controlled surface quality.

Mold Structure & Design Description

Core pins and cavity inserts are designed as replaceable mold components integrated into the core and cavity sides of injection molds.
Key structural considerations include:

• Accurate geometry matching product design specifications

• Proper fit with surrounding mold components

• Structural strength to withstand injection pressure

• Compatibility with multi-cavity mold layouts

All parts are designed and machined strictly according to customer drawings to ensure proper assembly and reliable operation within the mold structure.

Manufacturing Capability & CNC Machining

Senlan Precision manufactures mold core pins and cavity inserts using advanced CNC machining and finishing processes.
Our production facilities are equipped with high-precision machining centers from MAKINO (Japan), HARDINGE (USA), and other internationally recognized brands, enabling:

• Machining accuracy up to ±0.002 mm

• Stable dimensional control for critical mold features

• High-quality grinding finishes for tight tolerance areas

• Precise EDM machining for complex geometries and deep features

Each process is selected based on part geometry, tolerance requirements, and functional application.

Custom Manufacturing & OEM Cooperation

We specialize in custom manufacturing and OEM cooperation, supporting:

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

• Custom material selection and heat treatment requirements

• 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 design 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

• In-process dimensional and surface checks

• Final inspection prior to shipment

• Traceable inspection records and documentation

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

Related Mold Components

• Precision mold inserts

• Mold core pins

• Cavity blocks and sleeves

• Multi-cavity mold spare parts

All related products are available on a custom manufacturing basis.

Technical FAQ

Q1: Are core pins and cavity inserts manufactured according to drawings?
Yes. All components are produced strictly according to customer-provided drawings and specifications.

Q2: Why are grinding and EDM processes used together?
Grinding ensures tight dimensional accuracy and surface quality, while EDM is used for complex geometries or deep features that cannot be machined conventionally.

Q3: What tolerance levels can be achieved?
Depending on part geometry, machining accuracy up to ±0.002 mm can be supported.

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

Request a Quotation

For pricing, lead time, or technical discussion regarding plastic mold core pins and cavity inserts with grinding and EDM processes, please provide your drawings or specifications.
Our engineering team will review your requirements and provide a professional quotation accordingly.