Dansk Industri Syndikat A/s

Disa Industries A/s

Georg Fischer Disa A/s

Vagn Mogensen

Ole Anders Jacobsen

Jan Bechmann Johansen

Emil Jespersen

Steen Pedersen

Kaj J&oslash;rgen Jensen

Jan B Johansen

Preben Nordgaard Hansen

Niels W Rasmussen

Villy E Jorgensen

Peter Krebs

In a transport system for a mould-string casting plant comprising a moulding machine () delivering a plurality of uniform mould parts () to a string of moulds on the transport system transporting the moulds from the moulding machine () to a pouring station () and further on to a solidification and cooling section (II, III, IV) and ending at a knock-out station in which the castings are taken out of the moulds (), the transport system comprises in combination&#x2014;a second section (II), in which the moulds () in the string are transported slidingly by means of movable longitudinal side rails () applying a positive lateral force on each side of the mould string () and moving in an advancing and longitudinal stepwise manner synchronised with the movement provided by the pressure plate () of the moulding machine (), and&#x2014;a third section (III), in which the transport is effected by means of a walling beam system (). In this way it is possible to provide a longer high-precision transport than possible when only using either side rail transport or walking beam transport.

Transport system for a mould-string casting plant

The present invention provides an apparatus for producing casting mould parts by compacting mould material between a first squeeze plate and a second squeeze plate forming movable end walls of a moulding chamber, which subsequent to the compacting can be opened by moving the second squeeze plate out of the way, after which the mould part can be pushed out of the moulding chamber by a further movement of the first squeeze plate in its compacting direction, the movement of the first squeeze plate being provided by a hydraulic drive unit comprising a movable cylinder member connected to the first squeeze plate and an associated stationary piston member having a piston rod extending tightly through an inner wall of the cylinder member and a piston. The movable cylinder member is guided in its linear movement by the piston and by the piston rod. By further providing supplementary means for guiding the movable cylinder member, it is possible to reduce the sag of the piston rod and cylinder member, when the cylinder member is advanced to the full extent to push out the produced mould part and improve the rigidity of the first squeeze plate against tilting movement during compacting.

Apparatus for producing casting mould parts

An apparatus for controlling the movements of the squeeze plates of a string moulding apparatus where the apparatus generally includes a moulding chamber defined between two squeeze plates. One of the squeeze plates can be pivoted to open the moulding chamber. The production cycle of the apparatus includes, apart from the charging of the chamber with mould material, several movements of the squeeze plates. A movement of one plate commences before the preceding movement of the other plate has finished. The hydraulic system of the apparatus comprises two pumps, one pump for each actuator associated to one of the squeeze plates.

Method of controlling the movements of the squeeze plates of a string moulding apparatus

The present invention relates to a method of controlling the movements of the squeeze plates of a string moulding apparatus, and to an apparatus for carrying out the method. Such an apparatus generally comprises a moulding chamber defined between two squeeze plates. One of the squeeze plates can be pivoted to open the moulding chamber. The production cycle of an apparatus of said kind comprises apart from the charging of the chamber with mould material several movements of the squeeze plates. A movement of one plate commences before the preceding movement of the other plate has finished. The hydraulic system of the apparatus comprises two pumps, one pump for each actuator associated to one of the squeeze plates.

Method of controlling the movements of the squeeze plates of a string moulding apparatus and string moulding apparatus

String mould plant including arrangement for preventing shrinkage voids

Methods of closing the inlet in a mould after non-gravity casting with a

After casting a mould (1) through a bottom inlet (2) with liquid metal (4) under pressure through a mouthpiece (5) of a casting device, the inlet (2) is closed by a closing element (8) being pressed by the mouthpiece (5) into sealing abutment against a seat in the mould (1). Subsequently, an inert gas is introduced into a passage (6) in the casting mouthpiece from a source (9) through a pressure reducing valve (11), a shut-off valve (12) which is capable of being selectively opened, a gas chamber (13) and a bore (14) in the mouthpiece (5). The inert gas is introduced such that the casting device can suck the liquid metal (4) from the closing element (8) a distance backwards in the mouthpiece (5). The effect of this is that oxidation of the liquid metal in the mouthpiece (5) or in the nozzle (7) is avoided, and a faster suction of the metal back from the closing element (8) and the nozzle (7) into the passage (6) of the mouthpiece (5), is achieved.

Method and device for terminating the casting process after non-gravity

When compacting mold sand in a mold chamber (not shown) to form a mold or mold part (not shown) by using two co-operating squeeze plates with associated patterns (not shown), in which one squeeze plate is actuated before the other one, the second squeeze plate is not acuated until the pressure in the mold chamber (or a parameter depending on or derived from this pressure) has reached a predetermined value. By proceeding in this manner it is possible to manufacture molds or mold parts in series with practically the same hardness or solidity.

Method and apparatus for manufacturing moulds or mould parts by

A method and an apparatus for replacing pattern plates in a moulding plant for making boxless mould parts of sand or other like material is characterized by the use of a revolving table (1), which is provided with e.g. four symmetrically placed arms (1), in which are suspended pattern plates (2,3). The revolving table is designed for sequential conveying of the pattern plates (2,3) for placing these on a squeeze plate (PP) and a counter-pressure plate (MTP), respectively, in the moulding chamber of a moulding plant (suggested only on the drawing). The pattern plates (2,3) are placed in the respective arms (1) when the latter are just opposite the changing position. From the changing position, the pattern plates (2,3) are conveyed into a moulding chamber by a transverse sliding movement in an essentially known manner.

Method and an apparatus for replacing pattern plates in a moulding system

In an apparatus for producing casting mould parts and comprising a pressure or squeeze chamber with movable end walls formed by a pressure plate and a counter-pressure plate, the hydraulic drive units for the said plates are constituted by piston/cylinder devices, in which the piston members are stationary, while the cylinder members are connected with the plates and dimensioned so as to stand up to any bending stresses exerted by said plates.

Apparatus for producing casting mould parts by compressing sand or a

A conveyor on which a casting mould consisting of closely juxtaposed mould parts is advanced stepwise, comprises a section formed by an endless flexible belt. Extending along the side edges of this belt are reciprocating coupling parts which during at least part of their forward stroke are firmly clamped to the edge portions of the belt, from which they are released during their return stroke. In this way elastic extensions and retractions of the flexible belt are excluded.

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Gentofte, Denmark

Vagn Mogensen