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 FRP Rebar Caterpillar Haul-off Machines FRP Rebar Haul off Machine 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
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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
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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
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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