Abstract: cooling unit for use in sand molds where casting parts are obtained. The coolers consist of several modules (5) mounted on a support (4) with a certain clearance, and attached to it by a bar (7), being placed on a pallet (3) handled by robotic means and displaceable within a casting installation together with an upper pallet (1) in which the mold is placed, which is superimposed and coupled on the lower pallet (3) in the automated assembly of the mold on the cooling unit, the mold being automatically disassembled from the cooling unit after the cast part (P) is obtained. Each cooler module (5) can consist of a single part, two parts (5′) or three parts (5″), and it is mounted on the corresponding support (4) with a clearance (6) in order to absorb the expansions and contraction caused by the heat transmitted by the molten metal.

Abstract: A tubular sand molding chamber having two conventional movable walls one mounted on a piston for compacting and expelling the cake and the other pivotably mounted on a displaceable hinge arm for opening the chamber, but having side walls that are also movable is disclosed. Each movable side wall includes a plate (11) mounted on a respective plate-holder (12) that is connected to guides (13) for sliding the side wall on a fixed support (14) through the action of a respective hydraulic cylinder (15), in such a manner that the effective width of the chamber be adapted to different cake sizes, in order to minimize the consumption of sand. However, the movable end wall that are mounted on a faceplate (20) affixed to a hydraulic cylinder and pivotably mounted on the hinge arm, respectively, for the compacting and expelling the sand cake, have replaceable plate assemblies.