Liquid thermal shock chamber VOF CastoJet CJK5

The CJK5 HVOF is a high pressure, high velocity thermal spray process, using liquid fuel (kerosene) and oxygen which are fed into a combustion chamber, where they are ignited and continuously combusted. The resultant hot gas at a pressure close to 1 MPa, emanates through a converging – diverging nozzle and travels through a straight section. The jet velocity at the exit of the barrel (>1000 m/s) exceeds the speed of sound. A powder feed stock is injected into the gas stream, which accelerates the powder up to 800 m/s. The stream of hot gas and powder is directed towards the surface to be coated. The powder partially melts in the stream, and deposits upon the substrate. The resulting coating consists of thin overlapping platelets, has low porosity and high bond strength. The CastoJet® Kerosene 5 - CJK5 - is the latest Castolin Eutectic development of kerosene fuelled high pressure HVOF (High-Velocity Oxy-Fuel) systems. The CJK5 developments have focused on the gun, powder feeder and operator interface. The operator interface is simple to use with a touch screen interface. The powder feeder has mass flow controlled carrier gas and closed loop motor control for reliability and repeatability of powder feed rates. The CJK5 control system is shown with the operator interface mounted onto the gas box for pictorial purposes only. In a typical installation, the gas box would be inside the spray booth. The powder feeder would either be inside or outside the spray booth. The operator interface would be outside the spray booth. The control system for the CJK5 HVOF consists of a PC with a touchscreen screen operator interface and a gas box.