This device is an automatic geomembrane welding machine, also commonly known as a crawler welder or hot wedge welder. It is the core equipment used in anti-seepage projects to weld thermoplastic geomembranes such as HDPE, LDPE, and PVC.
Core Principle
It adopts the hot wedge fusion welding process:
- An internal heating wedge heats the contact surfaces of two layers of geomembrane to a molten state.
- Constant pressure is applied by rollers to fuse the molten materials together.
- After cooling, a continuous, high-strength double-track weld is formed, with a leak-test channel in the middle to facilitate subsequent air pressure testing of the weld’s tightness.
Main Features
- Integrated mechanical and electrical design, compact and lightweight, suitable for field operations.
- High temperature control accuracy; temperature and welding speed can be adjusted according to the material and thickness of the membrane.
- Built-in automatic crawling function, enabling stable welding on slopes, vertical surfaces, and even inverted positions.
- High-strength double weld structure, with an intermediate channel supporting air pressure leak detection for reliable anti-seepage performance.
Applications
Widely used in various anti-seepage projects:
- Construction of anti-seepage liners in landfills and tailings ponds.
- Welding of geomembranes for artificial lakes, reservoirs, canals, and sewage tanks.
- Welding of waterproof boards in tunnels, basements, and subway projects.
- Anti-seepage construction for aquaculture ponds, oil storage tanks, and chemical reaction tanks.
Compared with traditional hot air welding, this automatic crawler welder produces more uniform welds, offers higher construction efficiency, and is more suitable for large-area, long-distance geomembrane laying operations.
