Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D5/00—Machines or plants for pig or like casting
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D39/00—Equipment for supplying molten metal in rations

Definitions

• the patent refers to billet filling, especially but not exclusively with liquid aluminium, and more specifica­lly to control devices for the liquid level in automatic filling lines for the said billets.
• the main aim of the patent is the obtaining of a uniform height of liquid metal in each one of the billet moulds, and this aim is achieved by carrying out measuring and control of the filling level of each billet mould.
• the patent logically has available an installation for filling, equipped with a gear wheel connected to the billet mould line, which is mounted on a shaft which in its turn is used for the arrangement of a bucket elevator equipped with buckets.
• a flume has access towards the inside of the bucket elevator in such a way that the li­quid metal which flows along the flume penetrates into the bucket elevator and through holes in the buckets themselves falls into the billet moulds.
• an essentially verti­cal metal rod which comes from an upper plat­form in relation to the plane or position of the area of the gear wheel and bucket elevator, in that this rod comes from a control box situated on top of the said plat­form.
• the rod is connected with its own tension device, which starts from the control box itself.
• a level tube surrounds the rod be low the area of the tension device, and the lower end of this tube carries with it a guide for the rod through which it protrudes towards the lower area of the billet moulds.
• the level tube surrounds and protects the sensor rod from the upper area below the tension device and down to the lower guide for the said rod, it has staggered ho­les along all its length, and it is fastened to the plat­form by means of a positioning assembly, which also incor­porated a tension device for adjustment, all this with a view to achieving the immobility of the tube and consequen­tly of the rod in each specific working position.
• the lower end of the rod remains essentially at a certain distance from the billet mould, and obviously at a certain distance from the bottom of it, without at any time making contact with the level of liquid metal that comes from the filling flume through the bucket elevator.
• the said end of the rod acts as a feeler, in such a way that once the liquid metal has reached a predeter­mined height in the billet mould, a signal is generated and then transmitted to a control unit.
• the signal in question can be of any kind, for example a spark produced between the rod and the surface of the liquid metal, a current induced between both, etc.
• the said signal is transformed in the control box, so as to prepare an order which is transmitted in its turn to one of the variables that intervene in the filling.
• variable might be the speed of the chain, the speed of delivery of the liquid metal, the intake flow of the liquid metal, etc.
• variable to be considered were the speed of the billet mould chain, and given that in the installation the angular speed of both the billet moulds and the bucket elevator are identical, a signal would be generated which would produce an alteration of the said speed to provide the resulting filling height.
• variable were either the intake speed or the flow, the order would establish the resulting alteration to cause greater or lesser intake of liquid metal into each billet mould.
• a platform (14)-(15) can be seen. From this platform, at the top, a support (13) is pointed out, which receives a tube (10), inside which is included a rod (11). The top part of this rod is connected to a tension device (17) and to a control box (9).
• the level tube (10) has "staggered” holes in it, and its bottom end (16) provides a guide area for the rod (11), whose bottom end is situated in proximity in relation to the billet moulds (1).
• FIG 3 shows, also in diagram form, this solution for the positioning of the rod in relation to the gear wheel (5), the shaft (4) and the bucket elevator (2) it­self.
• the level tube (10) is controlled by the support (13) on the platform (15) and a tension adjustment device (16) is also situated for the tube (10) and the rod (11).

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Continuous Casting (AREA)
• Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
• Forging (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8255120

Family Applications (1)

Country Status (2)

Citations (6)

• 1988
  • 1988-03-02 ES ES888800614A patent/ES2007443A6/es not_active Expired
• 1989
  • 1989-03-02 EP EP89500024A patent/EP0333621A1/fr not_active Withdrawn

Patent Citations (6)

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