Understanding the 112mm Nissei Screw and Its Applications in Injection Molding
- megan15067
- Mar 4
- 4 min read
www.completeplastics.com, sales@completeplastics.com, 770-417-6983. Injection molding machines rely heavily on the precision and durability of their components. One such critical component is the screw, which plays a vital role in melting, mixing, and injecting plastic materials into molds. Among the various screw sizes used in large-capacity injection molding machines, the 112mm Nissei screw stands out for its specific applications and performance. This post explores the features, compatible machines, technical specifications, and common uses of the 112mm Nissei screw, helping professionals in manufacturing and plastics processing understand its value.
Understanding the 112mm Nissei Screw and Its Applications in Injection Molding
The 112mm Nissei screw is designed for large-tonnage injection molding machines, particularly those in the FN Series. Its diameter of 112 millimeters and total length of about 104.88 inches (approximately 2664 millimeters) make it suitable for processing large volumes of plastic material efficiently. This size is not arbitrary; it balances the need for high throughput with the mechanical strength required to handle demanding molding cycles.
Understanding the 112mm Nissei Screw and Its Applications in Injection Molding - The screw’s length and diameter contribute to its L/D ratio (length-to-diameter ratio), which typically ranges between 20:1 and 30:1 for this size class. This ratio affects the screw’s ability to melt and homogenize the plastic material before injection. A higher L/D ratio generally improves mixing and melting but requires more torque and power from the machine.
Compatible Machine Models
The 112mm screw is a standard configuration for several large-capacity Nissei injection molding machines. These machines are often used in industries that require high precision and large part sizes, such as automotive and consumer appliances. Key compatible models include:
FN-5000-50A
This model frequently uses the 112mm screw. It is designed for high-volume production and can handle a variety of thermoplastics.
FN-6000 and FN-7000 Series
These larger machines in the FN series also use bore sizes that include the 112mm specification. They are built for even higher clamping forces and larger shot sizes.
Large Hybrid Units (FVX-Ⅲ Series)
While screw lengths may vary in this series, the 112mm diameter is cataloged for Nissei’s hybrid machines. These units combine electric and hydraulic systems to improve energy efficiency and precision.
Understanding which machines use the 112mm screw helps manufacturers select the right replacement parts and optimize machine performance.
Technical Specifications of the 112mm Nissei Screw
The technical details of the 112mm Nissei screw reflect its role in heavy-duty injection molding:
Screw Diameter: 112 mm
Total Length: Approximately 104.88 inches (2664 mm)
L/D Ratio: Typically between 20:1 and 30:1
Material Options:
- CPM 9V steel, ideal for abrasive materials like glass-filled plastics
- H-13 steel, nitrided for general-purpose molding durability
These materials ensure the screw withstands wear and tear, especially when processing abrasive or high-temperature plastics. The choice of steel affects the screw’s lifespan and maintenance intervals.
Common Applications of the 112mm Nissei Screw
The 112mm screw is widely used in manufacturing large plastic parts where consistency and strength are critical. Typical applications include:
Automotive Components
Large parts such as bumpers, dashboards, and interior panels often require the capacity and precision provided by machines equipped with 112mm screws.
Consumer Appliances
Housings and structural parts for appliances like washing machines, refrigerators, and air conditioners benefit from the screw’s ability to process large shot sizes.
Industrial Parts
Components for machinery, containers, and other industrial uses often demand the durability and throughput that the 112mm screw supports.
These applications highlight the screw’s role in industries where large, complex plastic parts are standard.
Selecting the Right Screw for Your Injection Molding Needs
Choosing the correct screw size and material is crucial for efficient production. The 112mm Nissei screw offers a balance of size and strength for large machines, but factors such as the type of plastic, shot size, and cycle time also influence the decision.
Material Compatibility
Abrasive materials require screws made from wear-resistant steels like CPM 9V. For general-purpose molding, nitrided H-13 steel provides good durability.
Machine Model
Ensure the screw matches the specifications of your Nissei machine model, especially the FN series or FVX-Ⅲ hybrid units.
Production Volume
Larger screws like the 112mm size support higher shot volumes, which can improve cycle times and reduce costs per part.
Consulting with suppliers such as Complete Plastic can help identify the best screw for your specific machine and application. They offer technical support and replacement parts tailored to Nissei injection molding equipment.
Maintenance and Longevity Tips
Proper maintenance extends the life of the 112mm screw and maintains molding quality:
Regular Inspection
Check for wear, corrosion, and damage to the screw flights and tip.
Material Handling
Avoid contamination and use recommended drying and processing conditions for plastics.
Timely Replacement
Replace screws before wear affects part quality or machine performance.
Following these practices reduces downtime and improves overall production efficiency.
The 112mm Nissei screw plays a critical role in large-scale injection molding, supporting machines that produce automotive parts, appliances, and industrial components. Its size, material options, and compatibility with key Nissei models make it a reliable choice for manufacturers seeking consistent quality and high throughput. For those operating or maintaining large-capacity Nissei machines, understanding the specifications and applications of this screw helps ensure optimal performance and longevity.
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