S136 PET Preform Mold Components | Gate Bushings & Core Inserts

Product Overview

Senlan Precision supplies S136 gate bushing core inserts engineered for PET preform injection moulds. Manufactured strictly to customer drawings (Built-to-Print), these inserts focus on gate accuracy, wear resistance, and process stability in multi-cavity moulding. Precision machining and controlled heat treatment ensure consistent gate geometry and long service life under high-cycle production.

Key Features & Advantages

• Material: S136 stainless mould steel (as specified), suitable for corrosion-sensitive environments

• Gate precision: Tight control of gate diameter, concentricity, and surface finish

• Wear resistance: Optimized hardness and microstructure for long production runs

• Process stability: Designed for uniform flow and repeatable preform quality

• High cavity compatibility: Consistent performance across multi-cavity layouts

• OEM / Built-to-Print: Manufactured strictly to drawings and tolerance requirements

Applications / Industry Use

• PET preform injection moulds

• Bottle and container preform tooling

• Multi-cavity moulds requiring stable gate performance

• Packaging mould systems with high cycle demands

Mold Structure & Design Description

Gate bushing core inserts are installed at the melt entry point of PET preform moulds. Their geometry directly influences melt flow, gate vestige, and cycle stability. Using S136 stainless steel provides corrosion resistance and dimensional stability, while precision machining ensures accurate alignment with the cavity and hot runner or runner system interfaces.

Manufacturing Capability & CNC Machining

• Equipment: High-precision CNC machines from MAKINO (Japan) and HARDINGE (USA)

• Processes: CNC turning, milling, precision grinding, EDM (if required), polishing

• Tolerance capability: Typically ±0.002–0.005 mm on critical gate features

• Surface finish: Controlled Ra per drawing to meet gate quality requirements

• Inspection: Concentricity, roundness, gate diameter, and functional dimensions

Custom Development / OEM Workflow

1. Drawing review – Gate geometry, tolerances, and interface requirements

2. Material confirmation – S136 grade and heat treatment specification

3. Process planning – Machining, finishing, and inspection route

4. Precision manufacturing – CNC production with in-process control

5. Final inspection & delivery – Measurement report and export packaging

Quality Control & Export Experience

• Incoming material verification and traceability

• In-process dimensional checks at critical stages

• Final inspection with documented measurements

• Stable export supply for packaging and preform mould manufacturers

Related Products

• PET preform core pins and cavity inserts

• Hot runner compatible gate components

• Stainless steel mould core and cavity parts

• Built-to-print mould spare parts for multi-cavity systems

FAQ (Technical & Purchasing)

Q1: Why is S136 commonly used for gate bushing inserts?
S136 offers good corrosion resistance and dimensional stability, suitable for PET processing environments.

Q2: Can gate dimensions be matched to existing mould systems?
Yes. Inserts are produced strictly according to customer drawings to ensure full compatibility.

Q3: Are these parts suitable for high-cavity moulds?
Yes. Consistency and tight tolerances support stable performance across multi-cavity layouts.

Q4: Do you support prototype or replacement orders?
Yes. Prototype, replacement, and serial production are all supported.

Get a Quote

Provide your drawings, cavity layout, material specification, and tolerance requirements. Senlan Precision will review your S136 gate bushing core insert needs and offer a technical quotation for PET preform injection mould applications.