The Ronen® Automatic 2 Die 2 Blow Bolt Making Machine is favored by many manufacturers. It forms the bolt blanks in two steps. The first mold forms the initial shape of the head, while the second mold completes the final shaping. There is no need to use them separately. The raw materials can be produced without continuous supervision.
The "Automatic 2 Die 2 Blow Bolt Making Machine" is a fully automatic two-mold two-blowing bolt forming machine, specifically designed for batch processing of bolt blanks. It can handle wire materials with diameters ranging from 3 to 12 millimeters, including carbon steel and stainless steel.
The Automatic 2 Die 2 Blow Bolt Making Machine is a special type of cold heading machine. It forms the bolt head by conducting two stamping processes on the wire blank in two separate dies. The first stamping begins the upsetting process in the first die, causing the metal to gather together. The second stamping completes the final formation of the bolt head shape in the second die. Compared to a single stamping machine, this two-step process can produce more complex or larger bolt heads.
The Bolt Making Machine starts with the wire from the coil. The automatic feeder guides the wire through the straightening machine to remove any bends. Then, the cutting mechanism cuts the wire into precise blanks. These blanks are immediately transferred to the first upsetting die. The consistent length of the blank is crucial for the appropriate amount of metal in the two stamping processes.
In the Automatic 2 Die 2 Blow Bolt Making Machine, the cut blanks are fed into the first die. The first punch strikes the end of the blank, extruding it into an initial shape, usually a simple conical or cylindrical form. This "pre-forming" stage gathers and redistributes the metal, making it easier to form the final head shape correctly at the next station.
| Model | Unit | RNBF-63S | RNBF-83S | RNBF-83SL | RNBF-103S | RNBF-103L | RNBF-133S | RNBF-133SL | RNBF-133L |
| Forging station | NO. | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Forging force | Kgf | 35.000 | 60.000 | 60.000 | 80.000 | 80.000 | 115.000 | 120.000 | 120.000 |
| Max.cut-off dia | mm |
∅8 |
∅10 |
∅10 |
∅12 |
∅12 |
∅15 |
∅15 |
∅15 |
| Max.cur-off length | mm | 80 | 80 | 115 | 135 | 185 | 145 | 190 | 265 |
| Output rate | pcs/min | 150-240 | 130-200 | 120-190 | 100-160 | 85-140 | 90-160 | 80-120 | 60-100 |
| P.K.O.Stroke | mm | 12 | 15 | 18 | 30 | 30 | 30 | 40 | 40 |
| K.O.Stroke | mm | 70 | 70 | 92 | 118 | 160 | 110 | 175 | 225 |
| Main ram stroke | mm | 110 | 110 | 160 | 190 | 262 | 190 | 270 | 380 |
| Main motor power | Kw | 11 | 15 | 18.5 | 22 | 22 | 30 | 37 | 37 |
| Overall dims. of cut off die | mm |
∅30x45L |
∅35x50L |
∅35x50L |
∅45x59L |
∅45x59L |
∅63x69L |
∅63x69L |
∅63x69L |
| Overall dims. of punch die | mm |
∅40x90L |
∅45x90L |
∅45x125L |
∅53x115L |
∅53x115L |
∅60x130L |
∅60x130L |
∅60x229L |
| Overall dims. of main die | mm |
∅50x85L |
∅60x85L |
∅60x130L |
∅75x135L |
∅75x185L |
∅86x135L |
∅86x190L |
∅86x305L |
| Die pitch | mm | 60 | 70 | 70 | 90 | 94 | 110 | 110 | 110 |
| Approx.weight | Ton | 6.5 | 11.5 | 12 | 15 | 19.5 | 20 | 26 | 31 |
| Applicable bolt dia | mm | 3-6 | 5-8 | 6-10 | 6-10 | 8-12.7 | 8-12.7 | 8-12.7 | 8-12.7 |
| Shank length of blank | mm | 10-65 | 10-65 | 15-90 | 15-110 | 20-152 | 20-100 | 20-160 | 50-220 |
| Overall dims | mm | 5300*2900*2300 | 6000*3100*2500 | 6500*3100*2500 | 7400*3500*2800 | 9000*3400*2900 | 7400*3500*2800 | 10000*3690*2900 | 10000*3690*3000 |
The selling points of the Automatic 2 Die 2 Blow Bolt Making Machine are its full automation and high efficiency. From feeding the material to cutting and forming, no human intervention is required. Workers only need to place the wire into the feeding rack and set the parameters. The head formation is more regular and no defects that may occur during a single extrusion will appear.
