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AssigneeDisa Industries A/S
InventorsPer Larsen, Christoffer Bay, Frederik Juhl Dynesen, Henrik Wegge, Torben Hansen, Jonas Højslet, Søren Erik Knudsen
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The sand moulding machine (1) includes a moulding chamber (2) formed by a chamber top wall (3), a chamber bottom wall (4), two opposed chamber side walls and two opposed chamber end walls (7, 8). A chamber wall is provided with a sand filling opening (9) communicating with a sand feed system (10). At least one of the chamber end walls is provided with a pattern plate (12, 13) having a pattern (14, 15). At least one of the chamber end walls is displaceable in order to compact sand fed into the moulding chamber. A number of compressed air inlet openings (18, 43) are located in a lower part of the moulding chamber and are arranged to form an upward airflow in at least a part of the moulding chamber in order to create an at least substantially fluidised bed of sand during a sand filling operation.
A sand moulding machine including a moulding chamber formed by a chamber top wall, a chamber bottom wall, two opposed chamber side walls and two opposed chamber end walls, wherein at least one chamber wall is provided with at least one sand filling opening communicating with a sand feed system, wherein at least one of the chamber end walls is provided with a pattern plate having a pattern, wherein at least one of the chamber end walls is displaceable in order to compact sand fed into the moulding chamber, wherein at least one of the chamber walls is provided with compressed air inlet openings connected to a compressed air source for the delivery of compressed air into the moulding chamber, wherein a number of the compressed air inlet openings are located in a lower part of the moulding chamber, wherein said number of the compressed air inlet openings are arranged to form an upward airflow in at least a part of the moulding chamber in order to create an at least substantially fluidised bed of sand at least adjacent a part of the chamber bottom wall during at least a part of a filling operation whereby the moulding chamber is being filled with sand through the at least one sand filling opening, wherein a number of or all of the compressed air inlet openings are arranged in a number of different groups, and wherein the compressed air inlet openings belonging to a specific group are connected to the compressed air source via a specific fluidisation control valve pertaining to said group and adapted to regulate the supply of compressed air to the compressed air inlet openings belonging to said group, wherein the compressed air inlet openings belonging to a specific group are arranged in a corresponding specific area of the chamber bottom wall and/or of the chamber side walls, and in that a number of said specific areas including compressed air inlet openings belonging to respective specific groups are arranged following each other in the direction from a first chamber end wall to a second chamber end wall.
A method of producing moulds, whereby a moulding chamber during a filling operation is filled with sand by means of a sand feed system, and whereby the sand is subsequently compacted, the moulding chamber being formed by a chamber top wall, a chamber bottom wall, two opposed chamber side walls and two opposed chamber end walls, whereby the moulding chamber is filled with sand through at least one sand filling opening provided in at least one chamber wall and communicating with the sand feed system, whereby a mould or mould part is provided with a pattern by means of at least one of the chamber end walls being provided with a pattern plate having a pattern, whereby sand is compacted inside the moulding chamber by displacing at least one of the chamber end walls, whereby an at least substantially fluidised bed of sand is created at least adjacent a part of the chamber bottom wall during at least a part of the filling operation when the moulding chamber is being filled with sand through the at least one sand filling opening, whereby the fluidised bed of sand is created by injection of compressed air into the moulding chamber in such a way that an upward airflow in at least a part of the moulding chamber is achieved, whereby the compressed air is injected through a number of compressed air inlet openings being provided at a lower part of the moulding chamber, whereby a number of or all of the compressed air inlet openings are arranged in a number of different groups, and whereby the supply of compressed air to the compressed air inlet openings belonging to a specific group is regulated by means of a specific fluidisation control valve pertaining to said group, wherein the compressed air inlet openings belonging to a specific group are arranged in a corresponding specific area of the chamber bottom wall and/or of the chamber side walls, and by that a number of said specific areas including compressed air inlet openings belonging to respective specific groups are arranged following each other in the direction from a first chamber end wall to a second chamber end wall.
Dependencies are inferred from the claim text.