Understanding the Compatibility of 63-5mm Screws in New Britain Injection Molding Machines
- megan15067
- 5 hours ago
- 4 min read
www.completeplastics.com, sales@completeplastics.com, 770-417-6983. Injection molding machines rely heavily on the right screw size to ensure efficient plastic processing. Among these, the 63.5mm (approximately 2.75 inches) New Britain TP screw stands out as a key component in medium-to-large tonnage machines. This screw size supports a range of shot capacities and machine models, making it a versatile choice for many manufacturers. This post explores which Understanding the Compatibility of 63-5mm Screws in New Britain Injection Molding. New Britain injection molding machines use this screw, how to identify compatible models, and what applications benefit most from this configuration.
Understanding the Compatibility of 63-5mm Screws in New Britain Injection Molding
The 63.5mm TP screw is a heavy-duty component designed for the TP (Toggle-Pressure) series of New Britain injection molding machines. This screw size balances shot capacity and injection pressure, making it suitable for a variety of thermoplastic and thermoset molding applications. Its diameter allows for medium to large shot volumes, which is essential for manufacturers needing consistent output and quality.
Understanding the Compatibility of 63.5mm Screws in New Britain Injection Molding Machines - Understanding the Compatibility of 63.5mm Screws in New Britain Injection Molding Machines - This screw size is not just a random choice; it reflects the machine’s ability to handle specific shot sizes and materials. The TP series machines are known for their toggle clamp design, which provides strong clamping force and precision. The 63.5mm screw fits perfectly into this design, supporting the machine’s performance goals.
Understanding the Compatibility of 63-5mm Screws in New Britain Injection Moldin
Understanding the Compatibility of 63-5mm Screws in New Britain Injection Moldin - Several New Britain models are compatible with the 63.5mm screw, each serving different production needs. Here are the most common machines where this screw size is found:
New Britain 300 TP
This 300-ton machine often uses larger screws to achieve shot capacities between 30 and 43 cubic inches. The 63.5mm screw fits well within this range, supporting medium to large production runs.
New Britain 275
The 275-ton variant is frequently seen in industrial auctions and is part of the TP series. It uses the 63.5mm screw to balance shot size and injection pressure for a variety of molding tasks.
New Britain 500 TP
For higher output needs, the 500-ton model uses screws ranging from 2.75 to 3.5 inches. The 63.5mm screw is on the smaller end of this range but still compatible for certain configurations.
HPM/New Britain 150TP9 & 220T14
These models, produced after HPM acquired New Britain’s plastics division, typically use smaller shot units. However, the TP series design allows for barrel and screw swaps, making the 63.5mm screw a possible upgrade depending on the injection unit setup.
How to Identify the Right TP Screw for Your Machine
Identifying the correct screw size involves checking the machine’s model number and specifications. The TP designation in the model name (e.g., 300TP, 500TP) indicates the toggle clamp series, which commonly uses the 63.5mm screw or similar sizes.
Look for these key features:
TP Series Labeling
Machines with “TP” in their model number are designed for toggle clamp operation and often use the 63.5mm screw.
Manufacturer Transition
After HPM acquired New Britain’s plastics division, some machines carry the HPM/New Britain label. These machines maintain compatibility with the original TP screw sizes.
Shot Capacity and Screw Diameter
Match the shot capacity requirements with the screw diameter. The 63.5mm screw supports medium to large shot sizes, so machines with shot capacities around 9 to 43 cubic inches are good candidates.
Applications Suited for the 63.5mm TP Screw
The 63.5mm screw is versatile and supports a range of molding applications:
General Thermoplastic Molding
This screw size is ideal for molding common thermoplastics such as polypropylene, polyethylene, and ABS. It provides consistent melt flow and shot volume for parts ranging from automotive components to consumer goods.
Thermoset Molding
Some New Britain TP machines, like the Model 300-30, are dedicated thermoset molders. The 63.5mm screw supports the higher pressures and temperatures required for thermoset materials, ensuring proper curing and part quality.
Medium to Large Part Production
The screw’s size allows for efficient production of medium to large parts without sacrificing cycle time or material consistency.
Practical Tips for Using the 63.5mm TP Screw
To get the most from your 63.5mm screw, consider these practical points:
Regular Maintenance
Keep the screw and barrel clean to avoid material degradation and ensure smooth operation.
Material Compatibility
Match the screw design (flights, compression ratio) with the material being processed for optimal melt quality.
Shot Size Adjustments
Adjust shot size and injection speed based on part design and material to avoid defects like short shots or flash.
Consult Manufacturer Specs
Always refer to New Britain or HPM documentation for specific machine and screw compatibility details.
Where to Find Replacement Screws and Support
If you need a replacement 63.5mm TP screw or technical support, companies like Complete Plastics offer a range of injection molding machine parts and expert advice. Contacting them via their website or phone can help you source the right components quickly, minimizing downtime.
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