Coarse sand-blasting machine for removing residual gypsum on surface of casting

Abstract

The invention discloses a coarse sand-blasting machine for removing residual gypsum on the surface of casting. The coarse sand-blasting machine comprises a machine case, an operation table, a placing slot, a bottom tank, a water tank, a telescopic spray ring, a sand blasting device, a supercharging chamber, a pushing rod, a first fan, a guide tube, a spray nozzle, a second fan, an air tube and a spray head. The coarse sand-blasting machine has the beneficial effects that: the water tank is mounted on the top of the machine case, the telescopic spray nozzle is connected below the water tank, water is atomized and sprayed onto gravels through the telescopic spray ring, so that the gravels can be pre-wetted, and therefore, weight of the gravels is increased, gravitational acceleration when the gravels are sprayed is increased, and removal efficiency of gypsum is improved. The first fan is used for guiding air into the spray head through the guide tube, so that airflow circulation is always kept at a spray head tube opening, and therefore, the spray head tube opening is prevented from being blocked, and an injection rate of gravels is increased. A pipeline is arranged below the first fan, and air is blown into the gravels, so that the gravels are changed into a flowing state from a static state, and therefore, the spray head tube opening is prevented from being blocked.

Description

technical field [0001] The invention relates to a sandblasting machine, in particular to a coarse sandblasting machine for removing redundant gypsum on the surface of castings, which belongs to the field of impeller production. Background technique [0002] Sandblasting machine is a kind of mechanical equipment that impacts and cuts the surface of the workpiece through abrasive materials. The surface of the workpiece can be obtained with a certain degree of cleanliness and different roughness by using the sandblasting machine, so that the mechanical properties of the surface of the workpiece can be improved, thus improving the The fatigue resistance of the workpiece increases the adhesion between it and the coating, prolongs the durability of the coating film, is also conducive to the leveling and decoration of the coating, removes impurities, variegated colors and oxide layers on the surface, and at the same time makes The surface of the medium is roughened, which can elimi...

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Problems solved by technology

[0003] However, in the existing impeller production process, the coarse sandblasting machine used to remove excess gypsum on the casting surface still has certain defects in use. Because sand is used for removal, the sand outlet pipe of the sandblasting machine is extremely easy to be blocked, and the sand particles The inherent weight is less and the acceleration of gravity is less, so the efficiency of jet cleaning is lower

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