Shot Blasting
Shot blasting process – Throwing the shotblast media at a high speed of 65 to 110 m/second in a highly controlled way. It removing the contaminates on the surface with the help of the abrasive impact. The process of shotblasting is on its peak. It use compressed air for propelling the shot blast media. This method remains to clean of metal frames. The shot blast production lines (both manual and automated systems), only became possible after the introduction of the centrifugal wheel blast machines. The system of shot blasting with the centrifugal wheel has proven to be more productive than by compressed air and achieves a better and more uniform finishing of the surface.
Wire flame spray Gun Metco 12E (Metco Metalizing Gun) uses a single wire that is entered in a jet flame. The temperature is close to 10,100 K, melting the wire. The air stream from the jet atomizes the molten particles, falling them onto the substrate. The technological parameters, such as feedstock, flame spray gun gas composition, and flow rate, and energy input, play an important role in the relationship between the particles and the substrate.
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The copper spray metalizing (copper spray gun) is used for a thermal spray of copper over the surface of the substrate. The copper coating thermal spray gun is used for coating after the sandblasting process. Before the copper spray metalizing with the copper thermal spray gun surface finishing is done with the sand blasting machine.
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The zinc spray gun is used for the coating process on the surface of the substrate to prevent rust. In a zinc spray gun, zinc and zinc alloys are sprayed over the surface of the component after melting it. To melt the zinc wire and zinc wire alloys oxygen and acetylene are used with compressed air.
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The aluminum spray gun is used for the coating process with aluminum wire on the surface of the substrate to avoid the risk of rust and oxidation. Aluminum wire is sprayed in an aluminum spray gun is sprayed across the surface of the component after melting it. In this process to melt, the aluminum wire oxygen and acetylene, or sometimes LPG gas is used with compressed air. Sometimes Oxygen and acetylene melt the aluminum wire and compressed air is used to atomize the molten metal or semi-molten metal on the surface of the substrate. In aluminum spray gun rollers are used to push and pull the wire in forward and backward direction.
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There are some spare parts used in a flame spray gun and Wire comes first in the siphon plug and then in the blasting nozzle, it completely holds the wire. The siphon plug should be cleaned occasionally. Wipe out the grooves and clean out the holes with the proper size wires from the cleaning wire kit. Do not wash the o-rings with a cleaning solvent. Examine them for damage and replace them if required. Do not stretch new o-rings more than necessary. Lubricate all o-rings before reassembling the siphon plug.
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The gas flow meter is a highly accurate and reliable instrument for regulating and measuring the flow of both oxygen and fuel gas in a manual powder and wire thermal & arc spray gun. It has precision needle valves which are actuated by adjustment knobs on the front panel that controls the movement of gas through the meter. Flow unit readout is provided in both Metric (NLPM) and U.S. Customary (SCFH) units.
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