Precision OD Grinding Mold Inserts | S136 Core Pins for Cosmetic Packaging

Product Overview

Standard tolerance OD grinding steel punch core pins from Senlan Precision are designed for injection molds used in cosmetic packaging components. Manufactured through precision CNC machining and external cylindrical grinding, these mold inserts provide stable dimensional control, consistent surface finish, and reliable performance in multi-cavity and high-repeat injection molding environments. All parts are produced strictly according to customer drawings and technical specifications.

Core Features & Technical Advantages

• Built-to-Print manufacturing based on customer-provided drawings

• Precision OD grinding for controlled diameter tolerance

• Stable straightness and concentricity for mold alignment

• Consistent surface finish suitable for cosmetic mold requirements

• Interchangeable design for multi-cavity injection mold systems

• Suitable for long-term production and routine mold maintenance

Applications & Industry Use

These steel punch core pin inserts are commonly applied in:

• Cosmetic packaging injection molds

• Bottle caps, closures, and dispensing component molds

• Precision plastic packaging molds

• Multi-cavity mold systems requiring replaceable inserts

• High-repeat injection molding operations

All applications are limited to industrial packaging and medical-related molding environments.

Mold Structure & Design Description

Steel punch core pins are functional mold inserts used to form internal or precision features in injection-molded plastic parts. Dimensional stability and surface quality are critical to ensure proper part release and consistent molding results.

Key design considerations include:

• OD tolerance compatibility with mold cavities

• Alignment accuracy within the mold structure

• Surface finish affecting demolding behavior

• Thermal and mechanical stability during injection cycles

• Ease of replacement without affecting cavity geometry

Each insert is engineered to match the customer’s mold layout and assembly requirements.

Manufacturing Capability & CNC Machining

Senlan Precision utilizes high-precision CNC machining and grinding equipment to ensure consistent quality across batches.

Manufacturing capabilities include:

• CNC turning and milling

• OD cylindrical grinding

• Tight tolerance control and dimensional repeatability

• Heat treatment upon request

• Full in-process and final inspection

Japanese and American precision machining equipment is used to support stable production quality and repeatability.

Custom Development & OEM Cooperation Process

All steel punch core pin inserts are supplied under Custom / OEM / Built-to-Print cooperation.

Standard process:

1. Drawing and tolerance review

2. Material and surface requirement confirmation

3. Precision machining and OD grinding

4. Dimensional inspection and verification

5. Packaging and export delivery

Support is available for prototype development and long-term OEM supply.

Quality Control & Export Experience

Quality control procedures include:

• Incoming material inspection

• In-process dimensional checks

• Final inspection against approved drawings

• Traceable production records

Senlan Precision has extensive experience supplying precision mold inserts to international customers with stable export logistics and documentation support.

Related Products

• Injection mold core pins and inserts

• Cosmetic packaging mold components

• Precision ejector pins and sleeves

• Custom mold spare parts

All related products are manufactured strictly according to customer drawings.

Technical FAQ

Q1: Are these core pins available in standard sizes?
No. All parts are custom manufactured according to drawings.

Q2: What OD tolerance can be achieved?
Tolerance capability is determined during drawing review and confirmed before production.

Q3: Are these inserts suitable for multi-cavity molds?
Yes. They are designed for interchangeable and multi-cavity mold systems.

Q4: Do you support long-term repeat orders?
Yes. Stable OEM supply and repeatability are supported.

Request a Quotation

For Standard Tolerance OD Grinding Steel Punch Core Pins for Injection Molds, please submit your drawings and technical requirements.
Our engineering team will review your specifications and provide a detailed quotation.