Custom Assab Steel Thread Cores | Precision CNC Machined Mold Tooling

Product Overview

Senlan Precision manufactures CNC-machined thread core mold tooling made from Assab die steel for injection mould applications. Designed for built-to-print production, these thread cores deliver stable dimensional accuracy, controlled concentricity, and reliable demoulding performance. They are suitable for high-volume moulds requiring consistent thread quality and long service life across packaging, medical, and industrial plastic components.

Key Features & Advantages

• Material options: Assab die steel grades selected per application (wear, corrosion, thermal stability)

• Precision CNC machining: Tight tolerance control for thread profile, pitch, and concentricity

• Stable demoulding: Optimized geometry for smooth rotation and reduced sticking

• Heat treatment ready: Vacuum hardening, tempering, nitriding, or coating available

• Built-to-Print: Fully customized dimensions and interfaces per customer drawings

• Process repeatability: Suitable for multi-cavity and high-cycle moulds

Applications / Industry Use

• Plastic bottle and container caps

• Closures and threaded packaging components

• Medical disposables with threaded features

• Technical plastic parts requiring repeatable thread accuracy

Mold Structure & Design Description

The thread core is engineered as a critical rotating or collapsible element within the injection mould. Design considerations include thread profile accuracy, core alignment, torque transfer, and wear zones. Senlan Precision machines internal and external features to ensure proper fit with sleeves, bearings, and drive mechanisms. Surface finish and edge control are managed to minimize plastic adhesion and extend maintenance intervals.

Manufacturing Capability & CNC Machining

• Equipment: High-precision CNC machining centers from Japan (MAKINO) and the USA (HARDINGE)

• Processes: CNC turning, milling, internal/external grinding, EDM (wire & sinker)

• Accuracy: Typical machining tolerance up to ±0.002 mm, subject to design

• Surface finishing: Polishing, mirror finish, nitriding, PVD/DLC coating (on request)

• Inspection: CMM, roundness, concentricity, and thread profile verification

Custom Development / OEM Workflow

1. Drawing review: Technical evaluation of customer CAD/prints

2. Material selection: Assab die steel grade matched to wear and corrosion requirements

3. Process planning: Machining route, heat treatment, and surface finish definition

4. Manufacturing: CNC machining and controlled heat treatment

5. Inspection & approval: Dimensional and functional checks prior to shipment

Quality Control & Export Experience

• Incoming material verification and traceability

• In-process and final dimensional inspection

• Hardness and surface condition validation

• Export experience serving international mould makers with consistent documentation and packaging standards

Related Products

• Precision mould core inserts for injection moulds

• Threaded core pins and collapsible cores

• Cavity inserts for cap and closure moulds

• High-precision mould spare parts (built-to-print)

FAQ (Technical & Purchasing)

Q1: Can thread cores be manufactured to non-standard thread profiles?
Yes. All thread profiles are produced strictly according to customer drawings or specifications.

Q2: What Assab steel grades are available?
Common options include corrosion-resistant and hot-work die steels; the final grade is selected based on application requirements.

Q3: Are surface treatments mandatory?
No. Surface treatments are optional and recommended based on wear, release, and maintenance considerations.

Q4: Is small-batch or prototype production supported?
Yes. Senlan Precision supports prototype, pilot, and series production.

Get a Quote

Provide your drawings, material preference, and tolerance requirements to receive a technical review and quotation from Senlan Precision. We support OEM and built-to-print manufacturing for precision injection mould tooling.