Overview

This document provides comprehensive technical specifications, configuration guidelines, and application recommendations for the (N) GB ... M series manifold nozzles with face fit design, used primarily in hot runner systems for thermoplastic injection molding.

1. Product Description and Classification

• Series: (N) GB ... M manifold nozzles
• Nozzle Type: Face fit manifold nozzles with screw-in tips
• Flow Bore Diameter: Standard 16 mm
• Nozzle Tips: Interchangeable screw-in parts allowing various tip shapes and gating types
• Gating Types: Open, Open with torpedo, Valve gate

2. Key Dimensions and Tolerances

• Critical dimensions include nozzle length (L), cut out lengths (L1, L2), head height (H), head diameter, and head ring depth.
• Dimensional tolerances comply with DIN ISO 2768-mK standards, ensuring manufacturing precision.
• Cut outs and locking pin grooves/bore dimensions are specified to prevent nozzle rotation and ensure secure installation.
• Nozzle lengths vary from approximately 48 mm to 387 mm depending on tip shape and series.

3. Heating and Electrical Specifications

• External heating supplied at 230 V AC.
• Configurations support 1 to 3 heating zones, with power ratings up to 1630 W depending on nozzle length and type.
• Thermocouples used are Fe/CuNi type, compliant with DIN 43710 standards.

4. Application and Material Compatibility

• Suitable for all common thermoplastics.
• Maximum shot weight per nozzle ranges from 1500 g to 2500 g depending on gating type and material viscosity.
• Cooling is mandatory around the nozzle tip and on the opposite side to maintain thermal stability and process consistency.

5. Nozzle Tip Shapes and Gating Types

• Open (N, K): Suitable for a wide range of thermoplastics with narrow to medium process windows.
• Open with Torpedo (T): Designed for materials with narrow to wide process windows, depending on tip shape variants (Y, U, F, P).
• Valve Gate (V): Provides precise gating control, recommended for low viscosity materials.

6. Configuration and Selection Guidelines

• Nozzle length codes correspond to specific lengths or length ranges, facilitating selection.
• Heating zones are numbered from the nozzle tip towards the head for clarity in temperature control.
• Selection requires specifying series, nozzle type, length code, tip shape, and gating type based on application needs.
• Locking pin grooves and bores are essential for securing nozzle orientation and preventing rotation.

7. Cooling and Installation Recommendations

• The nozzle tip front must always contact the plastic melt to ensure proper gating.
• Cooling channels should be designed around the nozzle tip and on the opposite side to maintain temperature stability and prevent material degradation.
• Mold plate cut outs must precisely accommodate nozzle and connection dimensions for proper fit.

8. Standards and References

• All dimensional and surface finish tolerances conform to DIN ISO 2768-mK.
• Thermocouple specifications comply with DIN 43710.
• For detailed design and application guidance, the Synventive Hot Runner Guide is the primary reference.

Summary of Critical Parameters

Additional Technical Details

• Nozzle tip shapes include L, S, V, W (versions 01 and 02), each suited for different process windows ranging from narrow to wide.
• Heater power ratings vary by length code and nozzle series, enabling segmented temperature control.
• Precise dimensional data (lengths, heights, face fit dimensions, angular parameters, radii) ensure proper mold assembly and function.
• Configuration procedure involves completing nozzle description with series, type, length code, gating type, tip shape, and heater power selection.

Global Support and Contact

Synventive offers regional technical support and sales contacts worldwide, including Australia, Brazil, Canada, China, Europe, India, Japan, and the United States, facilitating application-specific consultation and assistance.

Conclusion

The (N) GB ... M series manifold nozzles offer versatile configurations with precise dimensional control, multiple gating options, and customizable heating zones. Adherence to DIN ISO tolerances and proper cooling and installation practices are critical for optimal performance and product quality in thermoplastic injection molding applications. The document serves as a detailed reference for nozzle selection, configuration, and application, supported by Synventive’s global technical resources.