Casting device for water pump shell casting

The invention discloses a casting device for a water pump shell casting. The casting device comprises a bottom plate, a first clamping plate and a second clamping plate. The bottom plate is horizontally arranged. The first clamping plate and the second clamping plate are both arranged on the top of the bottom plate. The first clamping plate and the second clamping plate each comprise two perpendicularly-arranged side plates. A V-shaped opening is formed between every two side plates. A containing cavity used for containing molding sand is jointly formed among the first clamping plate, the second clamping plate and the bottom plate. The space size of the containing cavity can be flexibly changed along with the adjustment of the position between the first clamping plate and the second clamping plate, and therefore the size of a sand box can be adjusted corresponding to water pump shell assemblies of various sizes, and the overall universality of the casting device is improved; and especially for small-size wate