It's a cold-forming machine that creates threads on a nail (or screw/bolt blank) by pressing and rolling it between two hardened steel dies. Unlike cutting, it displaces the material to form the threads, resulting in stronger, smoother, and more precise threads.
Core Principle: The nail blank is squeezed between a moving flat die and a stationary circular die (or two flat dies). The dies have the inverse thread pattern engraved on them. Under immense pressure, the metal flows into the die cavities, forming the thread.
Parameters of Wire Nail Thread Rolling Machine
|
MODEL |
GS-100 |
|
LENGTH(mm) |
25-100(80 ALL SCREW) |
|
DIAMETER(mm) |
1.8-3.2/1.8-4.2 |
|
SPEED(PCS/MIN) |
1200 MAXIUM |
|
MAIN MACHINE POWER(Kw) |
5.5Kw/7.5Kw |
|
TOTAL POWER(Kw) |
7.5Kw/9.5kw |
|
DIMESION(mm) |
1200*1200*1400 |
|
WEIGHT(Kg) |
1400Kg |
Types of Thread Rolling Machines for Nails
Flat Die Thread Rollers:
Most common for nails.
Use one moving flat die and one stationary circular die.
Efficient for high-volume production of standard nails/screws.
Planetary (Radial) Thread Rollers:
The nail blank is held stationary.
Multiple circular dies converge radially around it to form the thread.
Excellent for precision and complex threads.
Cylindrical Die (Two-Die) Rollers:
Use two parallel cylindrical dies with the thread form.
The blank is fed between them. More common for longer bolts.
Key Considerations for Operation & Purchase
Blank Preparation: The nail blank diameter (Pitch Diameter) is critical. It must be precisely sized for the material to flow correctly.
Material: Works best with ductile metals like low-carbon steel, stainless steel, aluminum, brass.
Lubrication: High-quality thread rolling oil is essential to reduce die wear and ensure a good finish.
Die Quality & Material: Dies are made from premium tool steel (e.g., M2, D2, Powder Metallurgy steels). Their design and heat treatment are crucial for life.
Machine Specifications: Consider thread diameter range, length capacity, production speed (PPM), and power.
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