In the modern mining, tunneling, and civil engineering sectors, FRP (Fiberglass Reinforced Polymer) bolts have emerged as the superior alternative to traditional steel. Their corrosion resistance, high tensile strength, and lightweight properties make them indispensable. However, producing high-quality FRP bolts requires more than just raw materials; it requires a high-precision Pultrusion Line, where the Caterpillar Haul-off Machine serves as the critical “heart” of the operation.
Why the Caterpillar Haul-off is Essential for FRP Bolts
When manufacturing composite rebar or bolts, maintaining a consistent pulling speed and force is paramount. Unlike standard profile pultrusion, FRP bolts often feature specific surface threads or ribs that must remain undamaged during the pulling process.
1. Uniform Pressure Distribution
The caterpillar design utilizes multiple rubber-coated track blocks that grip the profile over a large surface area. This ensures that the pressure is distributed evenly, preventing any structural deformation or surface micro-cracking of the fiberglass rod.
2. High Traction Force for Large Diameters
For heavy-duty mining bolts (such as Φ18mm to Φ25mm), the resistance within the heated die can be immense. Our caterpillar haul-off systems are engineered to provide a stable traction force of up to 200 kN, ensuring smooth operation even under maximum load.
3. Precision Speed Control
Equipped with Siemens PLC and high-end frequency inverters, our machines allow for micro-adjustments in pulling speed (typically ranging from 0.1 to 1.5 m/min). This precision is vital to synchronize with the resin curing time in the mold, ensuring the final product meets international ASTM or ISO standards.
Key Technical Specifications
For professional buyers evaluating equipment, performance data is the deciding factor. Below are the standard specifications for our high-performance models:
| Feature | Specification |
| Applicable Rebar Diameter | Φ10mm – Φ32mm |
| Maximum Pulling Force | 100 – 250 kN |
| Pulling Speed Range | 0.1 – 2.0 m/min |
| Effective Gripping Length | 1500mm – 3500mm |
| Control Interface | Industrial Touch Screen / PLC |
Integration with Resin Mixing Systems
The quality of an FRP bolt starts before the pultrusion die. A consistent resin matrix—often mixed with fillers like Calcium Stearate or Zinc Stearate and specific antioxidants—is crucial for smooth pulling.
Safety and Maintenance: The Industrial Standard
At Plastmixer and Prowelltec, we believe that safety is the foundation of production. Our haul-off machines are designed with:
Emergency Stop Systems: Strategically placed for instant shutdown.
Safety Guards: Transparent but high-strength covers to prevent operator contact with moving tracks.
Low-Maintenance Tracks: Quick-change rubber blocks that reduce downtime and operational costs.
Conclusion
Investing in a high-quality Caterpillar Haul-off Machine is not just an equipment purchase; it is a commitment to the quality of your GRP/FRP products.
Whether you are setting up a new mining bolt production line or upgrading an existing facility,our engineering team provides customized solutions tailored to your specific output requirements.
Looking for a quote or a technical consultation? Visit us at www.plastmixer.com or www.prowelltec.com to explore our full range of composite machinery and mixing solutions.
