Joining a round polyurethane belt can be done through a few methods, depending on the type of belt and the tools available. Here are the most common methods:
Heat Welding (Preferred Method)
Required Tools
Polyurethane Round Belt Welding Kit
Detailed Steps
- Measure and Cut the Belt: First, measure the polycord belt length according to the equipment’s requirements. Use a sharp cutter to ensure both ends are cut straight, clean, and at a 90-degree angle.
- Align and fix: Put both ends of the round belt into the clamp to ensure that the belt is completely aligned, otherwise there will be deviation at the joint, affecting the use effect.
- Heating and Pressing: Adjust the hot melt machine to 250 degrees, melt the two ends of the round belt fixed on the clamp, the temperature must be within 250 degrees, otherwise it will affect the physical properties of the polyurethane, the time is usually between 10s and 30s.
- Hold and Cool: Keep the PU round belt under pressure in the clam for 3 to 5 minutes until the weld cools and solidifies. Cooling time depends on the belt’s diameter and the ambient temperature.
- Trim the Weld: Use a trimming knife to remove excess material from the joint. Ensure the joint is smooth, without bumps or burrs, to ensure smooth belt operation.
Important Tips
Maintain an appropriate heating temperature. If the urethane round belt is underheated, the weld will be weak. Overheating can burn the material and reduce the belt’s life.
Proper alignment is crucial. Ensure the belt ends remain straight and aligned throughout the process to avoid misalignment, which can affect the belt’s performance.
Mechanical Fastening (Less Common)
This method uses special clips or fasteners designed for round belts but is less common due to the risk of weakening the belt at the joint.
Cold Welding (Adhesive Bonding)
Some belts can also be joined using a specialized adhesive for polyurethane materials. This method can be slower and less common than heat welding but works in some scenarios.
Summarization
The heat welding method is generally preferred for round polyurethane belts due to its strength and durability. However, the mechanical fastening and adhesive methods can be useful in situations where heat tools are unavailable or inappropriate.
