Hardened Steel Core Pins & Bushings | High-Precision CNC Blow Molding Tooling

Product Overview

Hardened Steel Core Pins & Bushings are high-precision CNC-machined injection mould components designed for stable, long-cycle blow molding and injection molding tooling. Manufactured by Senlan Precision on a Built-to-Print (OEM) basis, these components provide accurate alignment, controlled wear, and consistent dimensional performance under high clamping forces and continuous production conditions.

Key Features & Advantages

• Manufactured from hardened tool steels for extended service life

• Precision CNC machining ensures tight dimensional and positional tolerances

• Stable core pin–bushing fit for accurate mould alignment

• Suitable for multi-cavity and high-cycle blow molding tooling

• Controlled surface finish to reduce friction and galling

• Fully customized according to customer drawings and specifications

Applications / Industry Use

• Blow molding tooling for plastic bottles and containers

• Injection moulds for packaging and closures

• PET, PP, PE bottle and preform mould systems

• High-output multi-cavity moulds

• Precision mould assemblies requiring reliable alignment components

Mould Structure & Design Description

In blow molding and injection mould systems, core pins and bushings act as critical guiding and forming elements. Their accuracy directly affects cavity alignment, wall thickness consistency, and mould life.

Senlan Precision manufactures these parts strictly to customer-provided drawings, with design control focused on:

• Core pin straightness and concentricity

• Bushing inner diameter accuracy and surface finish

• Controlled clearance between mating components

• Repeatable positioning in multi-cavity mould layouts

This approach ensures stable mould operation and predictable maintenance intervals.

Manufacturing Capability & CNC Machining

Production is carried out using a controlled CNC machining workflow, including:

• CNC turning and milling for profile accuracy

• Precision grinding for critical diameters and fits

• Heat treatment management for hardness stability

• Final dimensional inspection of all functional features

Machining capability is supported by high-precision equipment from MAKINO and HARDINGE, enabling consistent quality and process stability for export-grade mould components.

Custom Development / OEM Cooperation Process

1. Customer submits technical drawings and requirements

2. Engineering review and manufacturability confirmation

3. Process planning for machining and heat treatment

4. CNC machining and precision finishing

5. Dimensional inspection and quality verification

6. Export packaging and shipment

All parts are supplied exclusively as OEM / Built-to-Print mould components.

Quality Control & Export Experience

• ISO-compliant quality management system

• Incoming material verification

• In-process and final dimensional inspection

• Fit and alignment checks for core pin and bushing sets

• Long-term export experience serving international mould manufacturers

Related Products

• Injection mould core pins and sleeves

• Blow mould guide pins and bushings

• Multi-cavity mould inserts

• Precision ejector pins

• Custom CNC-machined mould components

FAQ – Technical & Purchasing

Q1: Are these core pins and bushings standard parts?
No. All components are manufactured strictly according to customer drawings.

Q2: Can hardened steel be specified by grade and hardness?
Yes. Material grade and hardness range are defined based on drawing and application requirements.

Q3: Are these suitable for multi-cavity blow molding tools?
Yes. They are designed to maintain alignment and consistency in multi-cavity mould systems.

Q4: Do you support small-batch or prototype orders?
Yes. Both prototype and production quantities are supported under OEM cooperation.

Request a Quote

For pricing and lead time on Hardened Steel Core Pins & Bushings – High-Precision CNC Blow Molding Tooling, please submit your drawings or technical specifications.
Senlan Precision specializes in OEM manufacturing of precision injection and blow mould components for packaging, medical, and industrial mould applications.