ASSAB H13 Precision Mould Parts

Glide Gate Inserts / Sprue Bushes / Nozzle Tips for Hot Runner Systems

Product Overview

Our ASSAB H13 Precision Mold Parts include:

• Glide Gate Inserts

• Sprue Bushes

• Nozzle Tips

These components are critical parts of hot runner and injection mold gate systems. They directly influence:

• Melt flow stability

• Temperature control

• Sealing performance

• Gate appearance quality

• Mold service life

Manufactured from premium ASSAB H13 hot work tool steel, these parts are designed for high-temperature, high-pressure injection molding environments.

All components are produced strictly according to customer drawings (Built-to-Print / OEM manufacturing).

Why Material Matters in Hot Runner Components

Many plastic materials require extremely precise processing temperatures.

If the temperature is too high:

• Material degradation may occur

• Discoloration and burning may appear

If the temperature is too low:

• Melt flow becomes unstable

• Short shots or filling imbalance may occur

In hot runner systems, the nozzle and gate components must:

• Maintain stable heat transfer

• Withstand thermal cycling

• Resist wear from continuous melt flow

ASSAB H13 offers:

• Excellent thermal fatigue resistance

• Good thermal conductivity balance

• Strong wear resistance

• Stable hardness at elevated temperatures

Technical Specifications

Material: ASSAB H13
Hardness: 50–52 HRC
Tolerance: ±0.05 mm (critical areas tighter upon request)
Surface Roughness: Ra0.6
Axiality: 0.005 mm
Verticality: 0.005 mm
Heat Treatment: Vacuum heat-treated and stress relieved

Optional Surface Treatments:

• TiN

• TiCN

• TiAlN

• Nitriding

• Black oxide

• Other coatings upon request

Product Functions

1) Glide Gate Inserts

Used to:

• Control gate opening and closing

• Maintain sealing integrity

• Reduce gate wear

• Improve molded part appearance

Key machining focus:

• Precise gate geometry

• Smooth sealing surface

• Accurate alignment with the nozzle system

2) Sprue Bushes

Responsible for:

• Directing the melt from the injection machine to the mold

• Ensuring stable material transfer

• Preventing leakage

Key machining focus:

• Concentric bore accuracy

• Heat-resistant structural stability

• Surface finish to reduce melt adhesion

3) Nozzle Tips

Located at the end of the hot runner nozzle.

Critical functions:

• Precise melt distribution

• Stable temperature transfer

• Controlled gate formation

Key machining focus:

• Accurate tip profile

• Thermal resistance

• Wear-resistant surface finish

Engineering & Processing Focus

Hot runner components operate under:

• Continuous high temperature

• High injection pressure

• Repeated thermal expansion and contraction

Therefore, our machining control emphasizes:

• Dimensional stability

• Tight geometric tolerance

• Heat-treatment distortion control

• Surface integrity

• Uniform hardness distribution

Manufacturing Capabilities

Processing equipment includes:

• CNC machining centers

• CNC milling

• Sodick wire-cut EDM

• Surface grinding machines

• Precision drilling equipment

We also manufacture:

• Core pins

• Cavity inserts

• Ejector pins and sleeves

• Guide pillars and bushings

• Slide core units

All parts are 100% inspected before shipment.

Industries Served

These components are widely used in:

• Medical injection molds

• Packaging molds

• Bottle cap molds

• Automotive plastic parts

• Cosmetic packaging

• Electronics housings

• Aerospace components

Especially suitable for multi-cavity and high-cycle molds.

Quality Control

Inspection equipment:

• CMM

• Hardness tester

• Surface roughness tester

• Height gauge

Quality procedures:

• Raw material inspection

• In-process dimensional checks

• Final inspection

• Surface finish verification

Packaging & Delivery

Packaging:

• Anti-corrosion oil coating

• PE protective bag

• Foam + carton

• Wooden box (if required)

Delivery Time:

7–15 working days (depending on quantity and complexity)

Shipping:

• DHL

• UPS

• FedEx

• Air freight

• Sea freight

Tracking information is provided for all shipments.

Why Choose Us

• Specialized manufacturer of precision mold components

• Experienced in hot runner gate systems

• Advanced high-precision equipment

• Strict quality management

• Fast quotation within 24 hours

• Competitive pricing with OEM-level quality

• English and Japanese communication support

Drawing Formats Accepted

PDF, DWG, DXF, IGS, STEP, and other standard CAD formats.

Request a Quotation

Please provide:

• 2D / 3D drawings

• Material requirements

• Surface treatment specification

• Quantity

• Delivery timeline

Our engineering team will review your request and provide a professional quotation within 24 hours.