welding mould

Exothermic welding is a simple, high efficiency and high quality method of metal connecting. Yuxun exothermic welding uses high temperature reaction of powdered copper oxide and aluminum. The chemical equation is 2Cu2O+2Al=6Cu+Al2O3 ( the temperature can be in excess of 2500°C.) It is a method of welding copper, iron, steel and ferroalloy without outside power. In order to weld different sizes conductor, a graphite mold is needed. It is only to put the conductor need welding in the mold, dump powder into the mold, ignite the starting powder, than the reaction takes place. Open the mold when it is cold, thus the conductor connection is finished. We supply different connections and the matched mold and welding powder. Characteristics 1.Good current loading ability The welding point current loading ability is the same as conductor. 2.Good mechanical performance The connection is a molecular connection. It is a permanent connection. 3.Stable dash current resistance The test shows that in the surge of big current in short time, the conductor melts earlier than theconnection point, so it will not be damaged by surge current. 4. Good resistance to corrosion The welding point is covered by copper, it provides good resistance to corrosion. 5.Simple and safe connection Neither outside power nor facility is required. It requires very little time to finish one welding. It can be done both indoor and outdoor. 6.Free control the reaction temperature Different welding powder is provided according to the metal features, so the welding powder can be very solid. Range of application It is widely used in lightning protection and grounding and surge protection projects, equipment grounding, petrochemical projects, airport and expressway construction.