Foundry flask clamp

In combination a pair of foundry flask parts to be joined, one half of a V-shaped dove tail flange along each edge to be joined, integral with the flask, said flanges abutting one another at the edges to be joined to form a generally flat surface across the two flanges, the adjacent flanges forming a V-shaped dove tail, a generally C-shaped clamp member having two legs extending from a center line at an obtuse angle to one another and having a jaw at each end adapted to slidably engage the dove tail flange, saw jaws acting transversely on the dove tail surfaces of said flanges to urge them together and a central depending tongue on the C-shaped member beneath the center line adapted to bear on the two adjacent flanges at their juncture.