Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
• • 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
  • B22D39/04—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by weight
• • 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
  • B22D5/02—Machines or plants for pig or like casting with rotary casting tables

Definitions

• the invention relates to a method for accurate filling of molds of a non-iron casting machine, for example a copper anode casting machine or a zinc anode casting machine, which are designed for production in fully mechanical casting operation as casting wheels and are equipped with the molds.
• the invention also relates to a device for carrying out the method.
• anodes are produced from non-ferrous metals with relatively high numbers in fully mechanical casting operation using multiple molds made of cast iron, copper or steel.
• the exact piece weight as well as the exact plane parallelism of their surfaces is considered.
• Constant compliance with these parameters is achieved particularly advantageously in the use of pouring machines equipped with casting wheels.
• one or two casting wheels equipped with molds are provided in a tiltable arrangement with oppositely disposed casting troughs, which are alternately filled with cast metal in molds passing underneath and then tipped into one mold at a time when it is stationary.
• the known production process finds its natural limits with the difference in speed between the standing casting troughs and the mold troughs undercutting these casting troughs.
• the speed difference enforces the maximum achievable output of anode casting according to unit weight, quantity and quality of piece, in particular depending the required service life of the casting wheel as well as the travel times including the acceleration and deceleration times.
• German Patent Application 2 011 698 For accurate casting of copper anode plates in the respective molds of a casting wheel is known from German Patent Application 2 011 698 that target weight of the anode plates before entering the G manme- talles in a mold regardless of the actual weight of a previously cast anode plate by weighing an absolutely adjustable subset to determine a total amount of two to three times the subset.
• the present invention seeks to provide an improved operating method and an improved design for non-iron casting machines in order to increase the product quality and to achieve a weight-accurate Kokillenbe colllung.
• the above object is achieved by a method referred to in the preamble of claim 1 by the characterizing features of claim 1, wherein in a first step liquid metal is introduced in a controlled mass flow to determine the continuous, dynamic weight gain in a Swissmulde and in a second step by tilting the intermediate trough liquid metal alternately placed on one side in a Dosiermulde existing there and tipped the intermediate trough in the direction of the second Dosiermulde after filling the first Dosiermulde and at the same time the mass of an anode from the first filled Dosiermulde by a controlled tilting movement in a the casting mold arranged on the casting mold is cast.
• the casting of the liquid metal is divided into preferably three phases, after which the liquid metal is first poured in a first phase with a relatively low mass flow in a mold and in a second phase after reaching a predetermined metal mass or Metal weight uniform filling of the mold is made with a relatively higher mass flow, and in a third phase after re-reaching a predetermined weight of molten metal, the weight-accurate fine filling with reduced mass flow.
• Dosiermulden on two casting wheels takes place after completion of the filling of a Dosiermulde the positioning of the next empty mold under each currently filled Dosiermulde.
• a particularly advantageous development of the invention is that the period between the positioning of two molds from service life of a casting wheel and movement times for positive or negative acceleration, for example for Befullen, inspection or removal, calculated as so-called cycle time, with a superposition of the movement times and in particular the Filling is considered.
• a casting machine having the features mentioned in the preamble of claim 7 that under each spout of a metal melting furnace intermediate recesses with transverse outlets are provided for the limited absorption of molten metal, which in a stationary arrangement their horizontal longitudinal axis can be tilted to both sides, as well as a dosing trough disposed at a distance of a vertical projection under each outlet opening about a transverse axis, and also a mold made of cast iron, copper or steel arranged at a distance of a vertical projection below each pouring edge of a dosing trough on a casting wheel.
• a step-shaped pouring edge is formed at the front outlet of each dosing trough.
• hydraulic cylinders are arranged for tilting each intermediate recess about its longitudinal axis and for tilting each dosing recess about its transverse axis.
• load cells are used for the current detection of the weight content of the intermediate troughs and for the current detection of the weight content of Dosiermulden.
• Figure 1 is a plan view of the pouring device of a metal casting machine with two casting wheels in a V-shaped arrangement of Dosiermulden.
• 5 shows the side view of a Dosiermulde in emptying-tilting position.
• FIG. 6 is an enlarged sectional view of the front spout of a Dosiermulde. 7 shows a side view of an intermediate recess with a pivot bearing;
• FIG. 9 is a perspective view of the pouring device.
• FIG. 1 The plan view of Fig. 1 shows the essential functional elements of a metal casting machine 9, 9 'in functional V-connection of Dosiermulden 5, 5' with an intermediate trough 4. This is by means of a tilting bearing axis xx tilted to both sides and empties it Molten metal through the outlets 6, 6 'in the Dosiermulden 5, 5'.
• a means for tilting preferably position adjustable hydraulic cylinders 12, 12 'are arranged on one side of a Dosiermulde.
• the intermediate recess 4 is pivotally mounted at two points on a frame 16 about its longitudinal axis x-x, wherein the third attachment point is a hydraulic cylinder 11 is used.
• the frame 16 is also mounted on load cells 13 at at least three points. The load cells are arranged within the overall system so that no lateral forces act on the load cells and thus no incorrect measurements occur.
• the Dosiermulden 5, 5 ' are tiltably mounted by means of their transverse axes y-y from the horizontal position to a discharge position tilted forward. After tilting the intermediate recess in the longitudinal axis x-x, melt is filled into the associated dosing trough 5, 5 'after one side in each case via one of the outlets 6, 6' (FIGS. 3 and 5)
• Weight-controlled melt is discharged from these dosing troughs into a respective mold 10, 10 'which is rotatably provided on the periphery of each casting wheel 9, 9'.
• an anode is off the first filled Dosiermulde 5, 5 'by a controlled tilting movement in one of the casting edge 9,9' arranged molds 10, 10 'shed.
• the liquid metal is first poured into a mold with a relatively low mass flow in order to avoid splashes or over-swirling.
• a subsequent phase after reaching a predetermined intermediate weight, a uniform filling of the molds 10, 10 'takes place with a higher mass flow.
• a final weight-accurate fine filling in the third phase takes place last.
• the tear-off point of the metal flow is chosen so that the predetermined weight tolerance is maintained.
• the pouring edge 8, 8 'of the dosing trough 5, 5' is advantageously designed such that the kinetic energy of the pouring stream is reduced as far as possible during tipping and the melt enters the die as vertically as possible, as shown in FIG. 5.
• a metering well 5, 5 ' is filled from the intermediate trough 4, while by means of the other metering trough the exact weighting of the first mold 10, 10' takes place.
• the positioning of the next empty dies 10 takes place only after the previous Befullen the two Dosiermulden 10, 10 ', and on the other hand the positioning of the next mold is carried out under the currently filled dosing trough.
• the cycle times between the positioning of two molds are calculated from the service life of the casting wheel 9, 9 ", for example for filling, inspection and removal and the movement times such as positive or negative acceleration, wherein a superimposition of the movement times and the times for the filling takes place ,
• an amount of liquid metal is made with predeterminable weight from an anode furnace in an intermediate trough 4, 4 'of a pouring device directed, wherein the mass flow of the liquid metal is regulated via the adjustable opening of a furnace flap.
• the controlled variable used here is the continuously determined weight of the dynamically increasing mass of the melt in the intermediate trough 4, 4 '.
• Dosiermulden 5, 5 ' In each case a mold 10 of the casting wheel 9 by lifting the rear portion of a Dosiermulde 5 by hydraulic cylinders 12, 12' means (not shown) position control.
• the troughs 5, 5 ' are tilted over the axes y-y in an emptying inclined position.
• the filling process of the mold from a Dosiermulde is carried out in three phases:
• Phase 2) after reaching a predetermined weight of liquid metal in a attributable mold 10 is now a uniform Befullen with a higher mass flow.
• Phase 3 after again reaching a predetermined weight of liquid metal in the assignable mold 10, a weight-exact residual fine filling of the associated mold 10 takes place.
• the tear-off point of the melt flow is chosen so that the weight tolerance is maintained.
• Dependent process parameters for this are: Anode weights different initial amounts of melt in a Dosiermulde 5 geometry of Dosiermulde while the pouring edge 8, 8 'of Dosiermulde 5, 5' designed so that the kinetic energy is reduced during tilting and the melt as perpendicular as possible in the mold flows.
• I i Means for tilting the intermediate trough 12.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
• Electrolytic Production Of Metals (AREA)
• Continuous Casting (AREA)
• Furnace Housings, Linings, Walls, And Ceilings (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=29264881

Family Applications (1)

Country Status (11)

Cited By (1)

Families Citing this family (21)

Family Cites Families (7)

• 2002
  • 2002-04-27 DE DE10218958A patent/DE10218958B4/de not_active Expired - Fee Related
• 2003
  • 2003-03-12 AU AU2003212338A patent/AU2003212338B2/en not_active Ceased
  • 2003-03-12 ES ES03708217T patent/ES2258218T3/es not_active Expired - Lifetime
  • 2003-03-12 AT AT03708217T patent/ATE317734T1/de not_active IP Right Cessation
  • 2003-03-12 EP EP03708217A patent/EP1501647B1/fr not_active Revoked
  • 2003-03-12 CA CA2483783A patent/CA2483783C/fr not_active Expired - Fee Related
  • 2003-03-12 WO PCT/EP2003/002522 patent/WO2003092928A1/fr not_active Application Discontinuation
  • 2003-03-12 RU RU2004134599/02A patent/RU2319579C2/ru not_active IP Right Cessation
  • 2003-03-12 US US10/513,062 patent/US7108043B2/en not_active Expired - Fee Related
  • 2003-03-12 DE DE50302425T patent/DE50302425D1/de not_active Revoked
  • 2003-03-24 PE PE2003000293A patent/PE20031003A1/es not_active Application Discontinuation
• 2004
  • 2004-07-27 ZA ZA200405967A patent/ZA200405967B/en unknown

Non-Patent Citations (1)

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