Molding machine and method to prevent a flask from deforming
AssigneeSintokogio, Ltd.
InventorMasamoto Naito
Life of this patent
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Abstract
A molding machine for producing a mold by applying external force of either pressurized air or mechanical compaction or both to molding sand (12) that is held in a mold space is disclosed. The mold space is defined by a master plate (9), which has a pattern (8), and a flask (7). The molding machine includes a lifter table (11) for vertically carrying the master plate (9) and the flask (7), a filling frame (4) disposed for vertical movement above the lifter table (10), and a reinforcing frame (5) disposed for vertical movement between the filling frame (4) and the lifter table (10). The reinforcing frame (5) and the flask (7) are adapted to approach each other such that the reinforcing frame (5) contacts the outer surface of the flask (7) to reinforce it.
Claims3
A molding machine that compacts molding sand by applying a mechanical external force to the molding sand comprising:
- a flask for receiving the molding, sand therein, said flask having an inclined vertical external surface;
- and
- a rigid frame having an inclined vertical inner surface corresponding to said inclined vertical external surface of said flask, said rigid frame being movable alongside said flask such that the inner surface of said rigid frame fits on the inclined vertical external surface of said flask to reinforce substantially the entire inclined vertical external surface of said flask at least when the mechanical external force is exerted on the molding sand in said flask.
Dependencies are inferred from the claim text.