GB736019A - Improvements in foundry moulding boxes - Google Patents

Abstract

736,019. Flasks. RICHARDS (LEICESTER), Ltd. Aug. 10, 1953 [Aug. 20, 1952], No. . 20915/52. Class 83 (1). In a foundry moulding-box each half is made up of four separately constituted wall-forming plates, viz. a pair of side plates and a pair of end plates, the plates of each pair having symmetrical and like lateral edges so as to be interchangeable, and the lateral edges of the end plates being abutted flat against and between the opposed lateral end parts of the side plates. The walls are cast and connected by bolts 7, each side wall 1 having at each end a tongue 4 which engages with a slot 6 in the adjoining end wall 2 to positively locate the walls 1, 2 and their rims relatively to one another. The inner marginal part of each longitudinal edge of the walls is cast with an outstanding rib 8 which is machined to ensure proper seating of each box half on the other, and of the box on the base-plate on the bottom platen of the ramming &c. machine. The internal surfaces of the walls are provided with re-inforcing ribs 9, 10, which also provide a support for the sand when rammed. The increased width of rib portions 13 allows of the formation of external grooves 14 which receive wedge clamps 16. Handles 21 are secured in ears 20. The box may be made from pressed steel. In a modification the main body of the box half is formed from steel lining plates, interfitted by slot and tenon joints and clamped together by detachable fittings for, e.g. light alloy.