APPARATUS FOR PREPARING MOULDS Russian patent published in 1995 - IPC

FIELD: foundry practice. SUBSTANCE: the base plate of the apparatus, placed whereon is a flask, has an opening. The pattern plate, with the pattern attached thereto in the upside down position, rests on the flask which is free to displace horizontally over the base plate. The means of feeding and compacting the sand is secured to the lower side of the base plate, coaxially with the flask. This means is a container for the sand with an open top. The inside dimensions of the container and the size and shape of the opening in the base plate match the inside dimensions and configuration of the flask. The holding capacity of the container exceeds that of the flask. Metal bodies, e.g. balls, are uniformly distributed over the entire surface area of the container bottom, and the container is installed so as to reciprocate up and down. An air cylinder imparts vertical motion to the container, the piston end of the cylinder being connected to a compressed air receiver and the piston rod end -- to a source of compressed air and a quick-acting pressure blow off valve. EFFECT: elimination of manual labour. 3 cl, 2 dwg