top of page
Search

The Essential Guide to 90mm Nissei Screws and Their Compatible Injection Molding Machines

  • Heat Tech
  • Mar 1
  • 3 min read

www.completeplastics.com, sales@completeplastics.com, 770-417-6983. Injection molding machines rely heavily on precision components to deliver consistent, high-quality results. Among these components, the screw plays a crucial role in melting, mixing, and injecting plastic material into molds. For large-tonnage Nissei machines, the 90mm Nissei screw with an overall length of approximately 80.90 inches (about 2055mm) stands out as a key part. This guide explores the specifications, compatible machines, and technical details of this specific screw, helping operators and maintenance teams understand its importance and applications.


Close-up view of a 90mm Nissei injection molding screw lying horizontally
90mm Nissei screw with overall length of 80.90 inches

The Essential Guide to 90mm Nissei Screws and Their Compatible Injection Molding Machines


The 90mm Nissei screw is designed for large injection molding machines, where precision and durability are essential. Its overall length of 80.90 inches makes it suitable for machines requiring long screws to handle high volumes of plastic material efficiently.


Key Features


  • Diameter: 90mm

  • Overall Length: 80.90 inches (approximately 2055mm)

  • L/D Ratio: Typically 18:1, which balances melting efficiency and injection pressure

  • Material Options: High-wear materials like CPM 9V (vanadium carbide) or S90V for corrosive environments

  • Injection Capacity: Around 89.5 oz (2672 cm³) for electric models such as the Nissei NEX460III


The Essential Guide to 90mm Nissei Screws and Their Compatible Injection Molding Machines - These features ensure the screw can withstand the mechanical and thermal stresses of large-scale injection molding while maintaining consistent output.


Compatible Nissei Injection Molding Machines


This specific screw size and length are compatible with several Nissei models, particularly those designed for high-tonnage applications. Understanding which machines use this screw helps in sourcing the correct replacement parts and maintaining machine performance.


Nissei FNX460-160A Servo-Hybrid


  • Uses a 90mm "C" screw with an overall length close to 80.827 inches

  • This screw matches closely with the 80.90" length, making it ideal for this model

  • The servo-hybrid design benefits from the screw’s efficiency in melting and injection


Nissei NEX460III All-Electric


  • The 210LE injection unit on this 500-ton machine uses a 90mm screw diameter

  • Electric models like this rely on precise screw dimensions to maintain injection accuracy

  • The screw supports an injection capacity of approximately 89.5 oz, suitable for large parts


Nissei FV9000 Horizontal


  • Older large-tonnage machines (around 618 tons) also use 90mm screws

  • These machines require durable screws to handle heavy-duty production cycles

  • The 90mm screw size is a standard for maintaining consistent performance


Nissei FN460-210L


  • Inventory records from parts suppliers like Telar Corp confirm 90mm screws as standard stock for this series

  • This ensures availability and compatibility for maintenance and repairs


Technical Specifications and Material Considerations


Choosing the right screw material and specifications is critical for longevity and performance. The 90mm Nissei screw is often made from materials designed to resist wear and corrosion, extending service life.


L/D Ratio and Its Importance


The length-to-diameter (L/D) ratio of 18:1 means the screw length is 18 times its diameter. This ratio is common for screws used in large injection molding machines because it:


  • Provides sufficient melting and mixing length

  • Balances shear and heat generation

  • Supports consistent plasticizing and injection


Material Options


  • CPM 9V (Vanadium Carbide): Offers excellent wear resistance, ideal for abrasive materials

  • S90V: Suitable for corrosive environments, protecting the screw from chemical damage


Selecting the right material depends on the type of plastic processed and the operating conditions of the machine.


Injection Capacity

Feed Screw
Buy Now


For electric machines like the Nissei NEX460III, the 90mm screw supports an injection volume of about 89.5 oz (2672 cm³). This capacity allows manufacturers to produce large parts or multiple smaller parts in a single cycle, improving efficiency.


Sourcing and Maintenance Tips


When sourcing a 90mm Nissei screw, it’s important to verify the exact specifications to ensure compatibility. Suppliers like Telar Corp and Complete Plastics provide detailed inventory and technical support for these parts.


Ordering Tips


  • Confirm the overall length matches your machine’s requirements (80.90 inches or close)

  • Specify the material based on your production needs

  • Check for OEM or aftermarket options to balance cost and quality


Maintenance Advice


  • Regularly inspect screws for wear, corrosion, or damage

  • Replace screws before performance drops to avoid defects in molded parts

  • Use proper cleaning and lubrication to extend screw life


Why Choosing the Right Screw Matters


Using the correct 90mm Nissei screw ensures your injection molding machine operates efficiently and produces high-quality parts. A mismatched or worn screw can lead to inconsistent melting, poor mixing, and defects such as short shots or burn marks.


Investing in the right screw reduces downtime, lowers maintenance costs, and improves overall productivity.



 
 
 

Comments

bottom of page