Understanding the 26mm Nissei Barrel for Injection Molding Machines

www.completeplastics.com, sales@completeplastics.com, 770-417-6983. Injection molding machines rely heavily on the right barrel and screw size to deliver precise, efficient production. Among the various sizes available, the 26mm Nissei barrel stands out as a popular choice for smaller-tonnage machines. This barrel size fits a range of Nissei models and offers a balance of shot weight and injection pressure ideal for producing small, detailed parts.

This post explores the key features of the 26mm Nissei barrel, the machines that use it, and the performance you can expect. Whether you are selecting parts for maintenance or considering machine upgrades, understanding this barrel size will help you make informed decisions.

Understanding the 26mm Nissei Barrel for Injection Molding Machines

The 26mm barrel is a standard size for many of Nissei’s smaller injection molding machines, typically those with clamping forces between 20 and 80 tons. This size is especially common in machines designed for high-precision, small-part production. The barrel diameter directly affects shot size, injection pressure, and overall machine performance.

Choosing the right barrel size impacts:

• Shot weight capacity: The volume of molten plastic injected per cycle.

• Injection pressure: Higher pressures allow for finer details and better filling of molds.

• Material compatibility: Different plastics require different barrel and screw designs.

  
  

Understanding the 26mm Nissei Barrel for Injection Molding Machines - The 26mm barrel balances these factors well for small to medium production runs, especially when working with materials like polystyrene (PS) and polypropylene (PP).

Nissei Machines That Use the 26mm Barrel

Several Nissei machine series incorporate the 26mm barrel, either as a standard or optional size. Here are some common models:

PS Series (Hydraulic)

• PS20: A classic 20-ton hydraulic machine often equipped with a 26mm screw and barrel. It’s widely used for small parts manufacturing.

• PS40 / PS40E5A: These 40-ton machines usually come with 28mm or 30mm barrels, but 26mm barrels are available as high-pressure options for specialized applications.

  
  

NEX Series (All-Electric)

• NEX80III / NEX80IV: The injection units labeled "5EG" or "5E" on these 80-ton machines often use 26mm barrels. They are designed for high-precision molding where tight tolerances are critical.

• NEX30 / NEX50: Smaller all-electric models frequently use the 26mm barrel as a standard or "B" size, balancing precision and shot size.

  
  

FNX Series (Hybrid)

• FNX80III-9A: Hybrid machines with smaller injection units often utilize 26mm barrels to combine electric precision with hydraulic power.

  
  

ES Series

• ES400 / 2000-5E: Aftermarket suppliers list 26mm barrel sets specifically for these models, indicating their common use in maintenance and upgrades.

  
  

26mm Nissei injection molding barrel and screw close-up

Feed Screw

Buy Now

Typical Performance of Machines with a 26mm Barrel

When a Nissei machine uses a 26mm barrel, it generally delivers the following performance characteristics:

• Shot Weight: Approximately 1.5 to 2.3 ounces (42 to 65 grams), depending on the material and stroke length. This range suits small parts like medical components, electronics housings, and precision connectors.

• Clamping Force: Machines paired with this barrel size usually have clamping forces between 20 and 80 tons. This range supports molds with moderate complexity and size.

• Injection Pressure: The 26mm barrel supports higher injection pressures, which helps fill intricate mold cavities and maintain part quality.

• Material Suitability: Commonly used with PS and PP, but adaptable to other thermoplastics requiring precise control.

  
  

This performance profile makes the 26mm barrel ideal for manufacturers focused on small, detailed parts that demand consistent quality and repeatability.

Why Choose a 26mm Barrel for Your Injection Molding Needs?

Selecting the 26mm barrel offers several advantages:

• Precision: Smaller diameter barrels provide better control over melt flow, which is crucial for detailed parts.

• Versatility: Compatible with a wide range of Nissei machines, including hydraulic, electric, and hybrid models.

• Cost Efficiency: Smaller shot sizes reduce material waste and cycle times, lowering production costs.

• Availability: Aftermarket suppliers and manufacturers like Complete Plastics offer replacement barrels and screws, simplifying maintenance.

  
  

For businesses producing small to medium-sized parts, the 26mm barrel offers a reliable balance of performance and cost.

Maintenance and Replacement Tips

Maintaining the barrel and screw in good condition is essential for consistent molding quality. Here are some practical tips:

• Regular Inspection: Check for wear, corrosion, or damage on the barrel and screw surfaces.

• Use Quality Parts: Source barrels and screws from reputable suppliers to ensure compatibility and durability.

• Monitor Shot Weight: Changes in shot weight can indicate barrel or screw wear.

• Clean Properly: Avoid residue buildup by cleaning barrels regularly, especially when switching materials.

  
  

Complete Plastics (contact: sales@completeplastics.com, 770-417-6983) offers a range of 26mm barrels and screws tailored for Nissei machines, supporting smooth operations and quick replacements.

Summary

The 26mm Nissei barrel is a key component for many smaller-tonnage injection molding machines. It supports shot weights ideal for small, high-precision parts and fits a variety of Nissei models across hydraulic, electric, and hybrid lines. Its balance of injection pressure, shot size, and material compatibility makes it a versatile choice for manufacturers focused on quality and efficiency.