Precision Injection Mold Pins | Custom Steel Insert Pins for Plastic Tooling

Product Overview

Metal Injection Molding Pins, also known as insert pins, are precision mould components used to form functional details, internal holes, slots, or structural features in plastic injection moulds. Senlan Precision manufactures custom insert pins according to customer drawings, ensuring dimensional accuracy, stable alignment, and long-term reliability in multi-cavity and high-cycle moulding environments.

Key Features & Advantages

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

• Suitable for plastic injection mould core and cavity systems

• High straightness and concentricity control

• Stable dimensional performance under repeated injection cycles

• Precision-machined surfaces for accurate mould integration

• Compatible with multi-cavity and high-output mould designs

• Material selection based on mould life and application requirements

Applications / Industry Use

• Bottle and packaging mould systems

• Screw cap and closure moulds

• Medical consumables and disposable moulds

• Multi-cavity injection moulds

• Precision insert and functional feature moulding

Mould Structure & Design Description

Metal injection molding pins are installed within mould cores or cavities to generate precise internal or external features during injection. Pin geometry, head design, and fitting tolerances are engineered to ensure accurate positioning, repeatable alignment, and smooth demoulding. Designs may include straight pins, stepped pins, threaded pins, or custom profiles according to mould structure requirements.

Manufacturing Capability & CNC Machining

Senlan Precision manufactures insert pins using high-precision CNC machining and EDM processes to achieve consistent quality and tight tolerances.

Manufacturing capabilities include:

• CNC turning for diameter accuracy and concentricity

• CNC milling for special head shapes and positioning features

• Wire EDM for complex geometries and fine details

• Precision grinding for straightness and surface finish

• Full-process inspection to ensure dimensional consistency

Production is supported by advanced machining equipment, including Japanese MAKINO and US HARDINGE machines, enabling reliable manufacturing of mould-critical components.

Custom Development / OEM Cooperation Process

1. Customer provides drawings, specifications, or samples

2. Engineering review of structure, tolerances, and materials

3. Confirmation of Built-to-Print manufacturing scope

4. CNC machining and EDM processing

5. In-process and final quality inspection

6. Export packaging and shipment

All projects are handled under custom / OEM / Built-to-Print cooperation.

Quality Control & Export Experience

• Raw material verification before machining

• In-process dimensional and tolerance inspection

• Straightness and concentricity measurement

• Final inspection prior to shipment

• Stable export supply for international mould manufacturers

Related Products

• Precision mould core pins and sleeves

• Threaded core pins for cap moulds

• Custom mould inserts and cavities

• EDM-machined mould components

• Multi-cavity mould spare parts

FAQ – Technical & Purchasing

Q1: Are these insert pins suitable for multi-cavity moulds?
Yes. They are designed for stable use in both standard and multi-cavity injection mould systems.

Q2: Can non-standard or complex pin designs be manufactured?
Yes. All pins are produced strictly according to customer drawings or technical specifications.

Q3: What tolerance levels can be achieved?
Tolerance capability depends on geometry and material, but meets the requirements of precision injection mould applications.

Q4: Do you offer standard sizes from stock?
No. Senlan Precision focuses exclusively on custom, Built-to-Print manufacturing.

Request a Quote

Please submit drawings or technical specifications to receive a quotation for Metal Injection Molding Pins / Insert Pins for Plastic Injection Moulds.
Our engineering team supports precision mould component manufacturing for packaging and medical injection moulding applications.