LPI NZ delivers exothermic bonding solutions to electrical engineers throughout NZ.
By creating an alumino-thermic reaction to weld metals, we create a simple, efficient and high-quality metal connection.
What is exothermic welding?
The exothermic welding process is a method of making electrical connections of copper-to -copper or copper-to-steel in which no outside source of heat or power is required
- Granular metals (granular copper oxide and aluminum) are placed into a graphite crucible and ignited.
- The reduction of copper oxide by the aluminum (exothermic reaction) produces molten copper and aluminum oxide slag.
- The slag floats to the surface and the disk melts, allowing molten copper to flow into the weld cavity and complete the weld and it solidifies.
- The mold is removed and readied for the next weld and the process only takes seconds.