Understanding the Tie-Bar-Less Technology in Engel Injection Molding Machines

Injection molding machines have evolved significantly over the years, with manufacturers constantly seeking ways to improve efficiency, precision, and ease of use. One notable advancement is Engel's tie-bar-less technology, which has transformed how molds fit and operate within these machines. This post explores the key features of Engel's tie-bar-less injection molding machines, focusing on the typical 18.750-inch tie bar spacing found in models like the Victory and e-victory series.

Engel tie-bar-less injection molding machine with open mold area

Understanding the Tie-Bar-Less Technology in Engel Injection Molding Machines

Traditional injection molding machines use four vertical tie bars at the corners of the mold area to hold the mold plates in place during the injection and clamping process. These tie bars limit the size of molds that can fit inside the machine and restrict access for automation equipment.

Understanding the Tie-Bar-Less Technology in Engel Injection Molding Machines - Engel’s tie-bar-less design removes these vertical bars, replacing them with a rigid platen and clamping system that maintains mold stability without the need for tie bars. This design allows:

• Larger molds to fit inside the machine

• Easier access for robotic arms and automation systems

• Improved flexibility in mold design and setup

  
  

Despite the absence of physical tie bars, these machines are still categorized by an equivalent "tie bar spacing" to maintain compatibility with existing molds and tooling standards.

The Importance of the 18.750-Inch Tie Bar Spacing

The 18.750-inch (approximately 476 mm) tie bar spacing is a common measurement for Engel's Victory and e-victory series machines, especially those with clamping forces between 80 and 110 tons (800–1000 kN). This spacing corresponds to models such as:

• Victory 330/80

• Victory 500/110

  
  

These machines use hydraulic or hybrid drives and are designed to handle technical parts with precision and reliability.

The 18.750-inch spacing serves as a reference point for mold makers and operators, ensuring molds designed for traditional tie-bar machines can be adapted or used with Engel’s tie-bar-less systems without major modifications.

Key Features of Engel Victory and e-victory Series

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Victory Series

The Victory series is a modular system designed for a wide range of technical parts. It covers clamping forces from 280 kN up to 5,000 kN, making it suitable for various industries, including automotive, packaging, and consumer goods.

Key benefits include:

• Flexible mold mounting options

• High repeatability and precision

• Energy-efficient hydraulic or hybrid drives

• Easy integration with automation systems

  
  

e-victory Series

The e-victory series combines the tie-bar-less clamping system with high-precision electric injection units. This hybrid approach is ideal for medical and technical precision parts where accuracy and cleanliness are critical.

Advantages of the e-victory series include:

• Precise control of injection speed and pressure

• Reduced energy consumption compared to fully hydraulic machines

• Compact design for space-saving installation

• Enhanced process stability for sensitive materials

  
  

Innovations in 2026 and Beyond

Engel continues to push the boundaries of injection molding technology. In late 2025 and 2026, the company introduced the victory electric series, which features a fully electric drive system for clamping forces above 1,300 kN. This series maintains the space-saving benefits of the tie-bar-less design while offering:

• Higher energy efficiency

• Quieter operation

• Faster cycle times

• Improved precision and repeatability

  
  

This innovation reflects Engel’s commitment to combining advanced mechanics with sustainable manufacturing practices.

Practical Benefits of Tie-Bar-Less Machines

Choosing a tie-bar-less injection molding machine like those in the Engel Victory or e-victory series offers several practical advantages:

• Larger Mold Capacity: Without tie bars, molds can be wider and more complex, allowing manufacturers to produce larger or multi-cavity parts.

• Simplified Automation: Robots and other automation tools can access the mold area more easily, improving production speed and reducing downtime.

• Reduced Maintenance: Fewer mechanical components in the mold area mean less wear and tear, lowering maintenance costs.

• Improved Safety: The open mold area reduces the risk of injury during mold changes and setup.

  
  

How to Choose the Right Engel Machine

When selecting an Engel injection molding machine, consider the following:

• Clamping Force Needs: Match the machine’s clamping force to the size and material of the parts you plan to produce.

• Mold Size Compatibility: Verify the tie bar spacing or equivalent dimensions to ensure your molds fit properly.

• Drive Type: Decide between hydraulic, hybrid, or fully electric drives based on your precision, energy, and budget requirements.

• Part Complexity: For highly technical or medical parts, the e-victory series with electric injection units may offer better control.

• Automation Integration: If you plan to use robotics or automated systems, tie-bar-less machines provide easier access and flexibility.

  
  

Summary

Engel’s tie-bar-less technology represents a significant step forward in injection molding machine design. The typical 18.750-inch tie bar spacing found in the Victory and e-victory series ensures compatibility with existing molds while offering the benefits of a tie-bar-less system. These machines provide larger mold capacity, easier automation, and improved precision, making them a strong choice for manufacturers producing technical and medical parts.