DE2320435C3 - Horizontal centrifugal casting machine and method for centrifugal casting of ribbed cylindrical castings - Google Patents

Description

on

one horizontal in the direction of rotation

The invention relates to
Centrifugal casting machine with a
drivable faceplate with which a centrifugal casting mold that can be dismantled into sections can be connected, and with a device for pouring molten metal into the mold during the rotary movement. The invention also relates to a method of centrifugal casting of finned cylindrical castings in which numerous arcuate mold sections are arranged to form a horizontally disposed cylindrical shape into which molten metal is poured and then rotated at a predetermined rotational speed. Such a centrifugal casting machine and such a method are described in US Pat. No. 3,467,169.

In the manufacture of dynamo-electric machines there are already a number of different ones Process to manufacture machine housings depending on a wide variety of factors, for example the dimensions and the number of to be cast

Casing.

For example, high pressure die casting processes have been used to form cylindrical housings. lialb des Manufacture in large numbers with a diameter of about 25 cm. On the other hand there were machine housings

above a diameter of about 25 cm, generally by sand casting or extruder processes manufactured.

The centrifugal casting process has been known per se for many years (see, for example, DE-PS 7 67 243

or US-PS 34 37 131). Centrifugal casters, however, have mainly been limited to casting Structures with a smooth outer surface, for example of metal pipes, or for manufacturing

development of inner linings on preformed objects, for example for casting Brake linings inside brake drums.

For example, in US Pat. No. 19 17 872, a centrifugal casting machine is described in which the linings of brake drums are poured by inserting a spoon into a metal drum, soft is held in place by several arcuate segments. The spoon is gradually tilted, around the metal at a uniform casting speed to pour into the drum. Since the mold is separate from the centrifugal casting machine and is part of the When the finished product is formed, there is no need to change the shape of the one produced by the Sdileudergießverfahren To tighten castings. A largely automated centrifugal casting machine for the production of Tubes with a smooth surface are also described in US Pat. No. 3,457,986. There are several forms at Perimeter of a bogie supported, which is threatened to the individual shapes on the perimeter to position the arranged stations, d. H. at a centrifugal casting station, at a station for spray cooling, at a station for removing the pipe, etc., in order in this way to the successive Carry out work steps of the casting process. However, such a machine is specially designed for Articles with a smooth surface and therefore would not be suitable for casting ribbed ones Structures because of the use of stretch bars Pliers for pulling the cast pipe out of the mold.

Furthermore, in DE-PS 23 02 760 a form that can be dismantled is proposed for centrifugal casting of cylindrical objects. Such a mold can produce large diameter, finned, cylindrical castings, but the speed of production is limited by the need to transfer the mold from the casting machine to the stripping machine. Furthermore, the crane used to transfer the mold from the casting machine to the stripping machine is normally controlled by an operator and the heat of the mold makes it difficult to assist with the transfer by hand. In spite of the partial automation of each individual machine Cm used for the casting, a considerable amount of manpower is required to carry out the process.

It is therefore an object of the invention to create a fully automated centrifugal casting machine, in which the assembly of the mold, the casting of a ribbed casting and the Stripping the mold from the casting are feasible in a single machine.

The task is with a horizontal centrifugal casting machine solved according to the invention in that the form section "each on a displacement device are attached, the sections together and for a rotary drive when assembling the form brings into engagement with the face plate that a receiving mandrel is axially means of a drive device is insertable into the casting and that then the mold sections by the displacement device are removable from the casting.

Further preferred exemplary embodiments Centrifugal casting machine according to the invention emerge from the corresponding subclaims.

Another object of the invention is to provide an automated method for centrifugal casting of to create ribbed castings and for stripping the mold from the castings.

This object is achieved according to the invention in a method of the type mentioned at the outset solved that a receiving mandrel is axially aligned with the casting, inserted into this and radially is expanded outwardly to a firm engagement with the inner surface of the casting that the arcuate mold sections are withdrawn radially outward from the casting and that the Casting seated on the mandrel is pulled axially out of the separate mold sections.

Further preferred embodiments of the method according to the invention emerge from the corresponding subclaims.

The advantages that can be achieved with the invention exist

in particular that the mold sections of the divisible casting mold from the centrifugal casting machine operated themselves and no longer have to be transported to a separate machine This not only eliminates the need for a transport crane and the associated operator, but also the Problems when transporting very hot objects are avoided. With the centrifugal casting machine and the method according to the invention includes all the working steps required for casting a casting carried out in a single machine. The receiving dome, which delivers the finished casting, supports this hot casting in an advantageous manner, so that it is protected against breakage or other damage.

The invention is now based on the following description and the drawing of exemplary embodiments explained in more detail.

F i g. 1 is a view of a centrifugal casting machine according to an embodiment of the invention.

FIG. 2 shows a top view of the receiving mandrel, which in the stripping machine according to F i ρ. 1 use finds.

Fig. 3 is a view of the bored PIa ^ e used in the assembly for determining the Speed and shape is used.

4 is an enlarged sectional view of the arrangement for detecting the rotational speed and the position the form according to FIG. 3.

F i g. 5 is a sectional view taken along line 5-5 of FIG. 1 to show the T-slot in which the gripping claws are slidably displaceable.

F i g. 6 is an enlarged view of the locking rings which are used to define the shape in their Casting position are used.

F i g. Figure 7 is an isometric view of the mold as assembled on the machine.

Fig. 8 shows the series connection of the cooling hoses with the for * - ^ cuts.

F i £ ,. j is a sectional view of the assembly for extracting the mold.

Fig. 10 is a sectional view of the mechanism for rotating the spoon

Fig. 11 is a view of the casting variable speed controller in the rotating mechanism of the spoon.

Fig. 12 is a graph showing the change in the speed of angular displacement of the spoon depending on the amount of aluminum poured out of the spoon.

Figure 13 is a sectional view of the expandable mandrel.

ν.

S!

14 is a view of the mandrel taken along line 14-14 of FIG. 13th

FIG. 15 is a sectional view of the mechanism of FIG Casting machine for spraying Vofi lubricants.

F i g. 16 is a view of the main turntable.

Fig. 17 is a view of the main turntable showing the speed control and the Mechanism for adjusting the position of the turntable.

Fig. 18 is a view of the rotary drive for the Main turntable.

Fig. 19 is a sectional view of the piston for mechanically adjusting the position of the main turntable.

F i g. 20 is a sectional view taken along line 20-20 of FIG. 17 showing the limit switches for use in FIG Control the rotation of the table.

', PM * nt ¹

! St Ci "iiiCuuii

i * aJ * * "II

üiiG ZCigi GiC SCCjüCHliCllC a conventional bearing block arrangement 32 and a standard coupling unit 33 transferred. As shown in FIG. 1, the outer housing 34 of the bearing block assembly 32 is fixedly attached to the base 35 of the casting machine to accommodate the belt load. A pair of bearings 36 allow rotation of the shaft 37 inside the bearing block assembly 32 to transmit the rotational force via the coupling unit 33 to the main shaft 31. The torque transmitted via the coupling unit 33 to the main shaft 31 is then transmitted to a turntable 20. This is connected to the hollow main shaft 31 by bolts 38 and allows the centrifugal casting mold 21 fastened on the face plate 20 to rotate.

The speed of the main shaft 31 is determined by an arrangement 39 for detecting the speed and the position the form monitors (see Figs. 3 and 4) this arrangement

U ι η Ί \ , et αϊ

Operation of the casting machine.

Figures 22a-c is an electrical circuit diagram of a Circuit suitable for controlling the operation of the machine.

F i g. 1 shows a horizontal centrifugal casting machine 10 embodying the invention, which generally a unit 11 for the drive and the drive transmission, a unit 12 for assembly and stripping the mold and a mandrel assembly 13. The mandrel arrangement 13 (also in Fig. 2 shown) is rotatable about the mold axially in a desired position with respect to the spoon 14 and the expandable attachment 3-15 or the spray head 16 for lubricant. The entire mandrel assembly is supported on a carriage 17 which is axially movable along the rails 18 and allows the axially inserting the correctly positioned component of the strand into the mold.

The drive and drive transmission unit 11 will be described below. The main drive for the horizontal centrifugal casting machine 10 is supplied by a drive motor 19, i. H. through a Fixed rotor motor such as that described in US Pat. No. 3,582,696. The speed is regulated by a control circuit as described in US Pat. No. 3,582,737. Typically, the drive motor is operated at a speed of around 900 revolutions / min, to on the face plate 20 to which the circular arc-shaped sections of the centrifugal casting mold 21 are attached are to obtain a speed of about 500 revolutions / min. Since the unit 11 for the drive and the The drive transmission is subject to a start and stop process several times during operation Motor 19 is preferably cooled by a fan unit 23 which is driven by a rotor 25 Fan wheel and suitable fan ducts 26 which contain the interior of the drive motor in connection bring with the external environment.

The drive end 27 of the main drive motor 19 rotates a pulley 28 to drive flexible drive belts 29 and to transmit the torque to a pulley 30 of larger diameter in order to obtain the desired reduction in speed between the drive motor and the centrifugal casting mold 21 in this way. Since the belt load is too great for a direct supply to the main shaft 31 of the unit for the drive and the drive transmission, the torque transmitted via the belt 29 to the main shaft 31 is an i'fiit over 39 cnihuit

wimuiigeii vcrseriene

Disk 40, which is attached to the shaft and runs between three proximity switches 41-43, attached to brackets 44 on block 45 on base 35. The uppermost proximity switch 41 is in the radial direction in matching position with six attached over the arch at a distance

Openings 46 brought in the disk 40 in order to measure the speed of the shaft 31 by the fact that the number of actuations of the proximity switch 41 is measured in a fixed period of time. The lower proximity switch 42 is semicircular in accordance with the radially outer ^; sf. ". r-njgen lip 47 of disk 40 and is used to determine whether shaft 31 is rotating. For this purpose, the constant actuation of this proximity switch is detected The proximity switch is brought into alignment with elevations 49 which extend axially outward from the disc 40. Proximity switches to achieve these functions are known per se and are commercially available from the General Purpose Control Department of the General Electric Company.

To the desired correspondence of the position between the extension 49 and the proximity switch 43 (and the resulting correspondence between the centrifugal casting mold 21 and the pulling device 48) is a small drive motor 50 (see Fig. 1) with the opposite drive end the shaft of the main drive motor 19 via a reduction gear 51 and an electric clutch 52 connected to slow rotation of the main shaft 31 after completion of the rotation of the mold at the end of a casting process, which is detected by the proximity switch 42. if therefore, the drive motor 19 stops after the completion of the centrifugal casting, the electrical coupling becomes 52 is coupled in and the small drive motor 50 is switched on to slowly move the shaft 31 through for as long to rotate the main drive motor 19 until the boss 49 is in position with the proximity switch 43 is stopped At this point in time, the power supply to the small drive motor 50 is stopped and electric motor braking is engaged to stop the mold from rotating. then the clutch 52 is decoupled and the tapered piston of the hydraulic cylinder 22 is inserted into a groove in the facing turntable 20

to lock the disc in place.

The main shaft 31 is not only used to apply the torque to the facing turntable 20 Carry over. Rather, it is also used as a line for transferring a liquid coolant to Form 21, which is attached to the turntable 20. The flying coolant, typically water, enters through an opening 54 into a water jacket 55 and into the axially outer annular chamber 53, the Water jacket the end of the remote from the mold Surrounding shaft 31. The coolant flows through the bore 56 of the shaft to a central tube 57 axial line along the shaft. The liquid coolant is then passed on into the annular chamber 58 is formed between a subdivision 59 and a plug 60, and flows from there radially outward through opening 61 in the shaft and through flexible

To go through sections of the form 21 (see also the explanation of FIG. 8). The coolant then returns through the opening 63 to the axial flow channel 64 between the shaft 31 and the tube 57 and is Returned from the annular chamber 65 via a radial bore 66 in the shaft 31 to an annular chamber 65 from the coolant flows through the opening 67 in the water jacket 55 for return to a unit Pump and heat exchanger (not shown) and recycle through the mold. One Subdivision 68 serves to control the flows of circulating Kf.il medium in the adjacent annular chambers on Separate the end of the shaft 31 from one another and conventional end seals 69 prevent a Passage of coolant adjacent to the shaft.

The main shaft 31 is supported at the driven end of the shaft by a ball bearing 70 and on A tapered roller bearing 71 is arranged at the drive end of the shaft to absorb loads on the shaft in radial and radial directions take up axial direction. Conventionally, the tapered roller bearing 71 is between the shaft 31 and the housing assembly 72 mounted in a fixed axial position, while the ball bearing 70 is axially can slide between the shaft and the housing assembly in order to place an axial load on this bearing avoid. Both bearings are lubricated by oil which is between the rotating shaft and the stationary housing assembly with the help of Öleinlaßjund outlet openings 73 and 74 in the interior of the Housing arrangement circulates

The following describes the unit for assembling and stripping the mold. A pair of Hydraulic cylinders 75 are held on a plate 76 which is firmly connected to the base part 35 serve to hold the mold locking unit 77 in the axial direction Direction to move back and forth and thereby set the mold 21 in its position for casting. To that The pistons 78 drive to effect locking of the mold inside the cylinder 75 the annular plate 79 reciprocally and this reciprocal movement of the plate is transmitted through the radially outer raceway of the tapered roller bearing 80 to the rotating bearing parts and slide the inner race of the bearing along shaft 31. Since the inner race of the bearing 80 also forms an integral part of the back plate 81, thereby the back plate and the rods 82 attached to the perimeter of the back plate also pass through Actuation of the piston 78 shifted in the axial direction. Axial movement of the rods 82 pulls the conically tapered circular surface 83 of the locking belt rings 84 against the conical tapered radially outer surface 85 of the gripping claws 86 for the mold, around these gripping claws 86 radially into a T'-shaped opening 87 to move (see Fig. 5), which is located in the turntable 20. This makes the four at each orthogonal arranged gripping claws 86 secured mold sections into an assembled cylindrical unit Latched Limit switches 88 are attached to the exterior of the housing assembly 72 to the exterior Measure the limitation of the pistons 78, d. H. by actuating the limit switch by means of guide surfaces 89, which are attached to the rod 90, which in turn is supported by the plate 79.

Since the axially outer and inner locking rings according to the reference numerals 84a and 846 of the unit for locking the shape due to uneven heat dissipation / Johntiricv #lar Illation \ uä \\ mnA AdC f ^ ipRpnc is not included

equal force in contact with the conically tapered surfaces 85a, 856 of the gripping claws 86 for the Can come shape, the axially outer locking ring 84a by an individual spring preload device driven. For this purpose, for example, Bellville washers 92 according to FIG used to compensate for the effects of thermal expansion. Although therefore the Rods 82 an equal axial displacement of the locking rings 84a and 84Zj when the hydraulic cylinder 75 can generate the thermisehe Extension of the gripping jaws 86 creates a clamping force between a ring, for example the inner ring 846 and the conically tapered surface 856 of the gripping claw which is larger as the clamping force between the outer ring 84a and the gripping claw. The inner radius of the Ring 84a is sized so that it engages and can thereby engage the gripping pawl prior to ring 846 the Bellville washer 92, which is adjacent Arranged towards ring 84a on rod 82 is to absorb the axial load when inner ring 846 is axial is brought into firm contact with the associated, conically tapered surface on the gripping claw 86, and thereby can distribute the force at axially opposite ends of the assembled Balance shape.

In Fig. 7, a centrifugal casting mold 21, which is preferably used for the invention and is divided into sections, is shown in the state attached to the machine, ie with the associated gripping claws 86 of the casting machine. The mold 21 is preferably made up of four arcuate sections 2ia-21d which have interdigitated axial edges 93 which when the sections are joined together form a composite shape which can hold the molten metal in place. However, the edges of the mold 21 are designed so that they can be disengaged and engaged simultaneously when all four sections are moved simultaneously along mutually perpendicular axes. In addition, in order to make the mold easy to disassemble while preventing the molten metal from leaking out of the mold, two diametrically opposed mold sections, & h. the sections 21a and 21a equipped with longitudinal edges which have an angled, preferably orthogonal, step 93a, which serves as a seat for the longitudinal edges 936 of the adjacent mold sections. The lips 94 extending radially inward on the axial

231 20 435

Ends of adjacent shaped sections also have edges 94a with a complementary angular course, preferably in the radial direction, soft when the mold sections are joined together fit. If the mold is used for casting frames for dynamoelectriscne machines the interior of each of the mold sections is preferably grooved to form a plurality of triangular-shaped grooves 91 to form, which extend substantially parallel to each other in each mold section and to produce the Serve cooling fins, which are desired for the cast frame. This happens without this Significantly hinder the removal of the mold sections from the frame. To achieve this · result the width of the grooves should taper at a suitable angle, i.e. about 2 ° 30 'towards the Penetration of the side wall into the mold.

Each mold section is individually attached to a mold gripping claw of the casting machine by bolts 95 and one appropriate fluid connection part connected. Preferably this is done through a commercial available quick connector part 96 and an elbow-shaped piece 97 (see Figure 8), which the liquid Coolant from the flexible hoses 62 to the area between the mold section and the solid with it connected claw preferably supplies the coolant in two streams successively through the composite unit of claws and shape according to FIG. 8 before it is returned to the heat exchanger and the coolant pump unit returned to the flow chamber 64 in the shaft 31 will.

The locking rings 84 clamp the mold sections together to form a compact one Unity and therefore none other than the conically tapered surfaces 85 on the shape gripping pawls further provision is needed along the outer periphery of the mold sections to accommodate the mold sections to connect with each other. However, there are four approaches (loops) on each shape section (see Fig. 7) provided to keep the sections in their mutual position and the exchange of mold sections to facilitate inside the casting machine. Therefore, to change the form against a form for a new one To exchange frame size, the pins 38 can through the loop-shaped lugs of the mold sections can be inserted to hold the sections in position with respect to each other and then the assembled Unit can be placed on the attachment 15 of the mandrel assembly 13. Then the carriage 17 for the mandrel assembly moves axially into the machine and allows the mold sections to be screwed together the gripping claws 86 of the machine. Then they can be used to define the shape sections with one another Pins are removed by hand and the mandrel can be pulled axially out of the mold to allow casting to begin.

As already stated, each of the gripping claws 86 to which the individual mold sections are attached has a conically tapered radial outer surface 85 at axially opposite ends of the mold, in order in this way to apply a radially inward force to the mold sections after the axial Displacement of the locking rings 84 over this Plärhpn 221 tr pgta tten Fin e KHHte der Kisu ** dls axially inner edge, has a T-shaped protruding part of a chamber, which is slidably received in the interior of the T-shaped opening 87 of the rotary faceplate cr20 and allowing the pawl to slide in the radial direction. The radially outer surface of each jaw also has a pull yoke 101 for engaging the pistons 102 (see Fig. 1) of the hydraulic pulling assembly 48 which are fixedly attached to the main stationary backplate 104 of the centrifugal casting machine.

In Fig.9, the drawing arrangement is shown in detail, which is used to form the Formrhabschnitte in position to be engaged by locking rings 84 and the mold sections deduct from the casting. It generally comprises a large hydraulic pull cylinder 105, for example a cylinder with a diameter of about 15 cm, which is fixed by brackets 106 and Elbows 106a attached to the back plate 104 ibt. The piston 102 of the pulling cylinder 105 has ei / i conically tapered two-part fork-shaped part Ϊ07 that is threadedly engaged with the front end of the Piston is for engagement with pull yoke 101 along the radially outer surface of gripping pawls 86. One elongated bracket assembly 108 extends outwardly from divided portion 107 for support of a Small diameter piston cylinder 109. This is used to drive the double locking pins 110 through aligned openings 111 in the two-part part 107 and in the pull handles of the claws after the inlet of the hydraulic fluid to the small diameter cylinder. Along the outer Housing of the small diameter cylinder 109 are two limit switches 112 and 113 attached to them engage the locking pins 110 and show the relative position of the locking pins to the two-part part 107.

Similarly, the piston 102 of the large pull cylinder also carries a lower platform 114 with it double guide rods 115, which are attached to it and for the actuation of limit switches 116 and 117 by means of guide surfaces 118 attached to the guide rods serve to adjust the extent of the adjustment of the piston 102 in the direction of the mold. Four pull cylinders 105 are spaced 90 "apart Main back plate 104 arranged around so that the two-part parts 107 are each in radial alignment with the pull handles 101 of the gripping claws 86 are. This makes it possible to use the four circular-arc-shaped Assemble sections of the mold 21 before casting into a cylindrical structure and also the Peel off mold sections from the casting.

To ensure that the four plungers are released simultaneously while the mold is being stripped from the Casting work, hydraulic fluid is supplied to the four extraction cylinders via commercially available Devices for dividing the liquid flow (not shown) are supplied in order in this way to the Removal of the mold sections from the casting in spite of any differences in the adhesive forces to synchronize between the casting and the individual mold sections. Facilities for Splitting the flow to achieve this result typically included four hydraulic pumps with a single interconnected shaft to ensure that equal amounts of hydraulic Liquid is pumped to each of the withdrawal cylinders 105

55 ^ be. Therefore, all puller heads are in theirs corresponding cylinder is drawn in at the same speed and there is practically nothing for that long Peel off until all of the mold sections are off the casting

IO

15th

20th

30th

have broken loose.

If the slippage speed of the pumps in the device for hydraulic flow separation becomes too high, two devices for flow distribution can be connected in series in the hydraulic lines, i.e. a device for flow distribution with a pumping capacity of about 28 l / minJ cylinder could be connected in series with a flow divider with a pump capacity: from 140 l / mirt / cylinder. The device for flow division with the lower volume then serves to reduce the slip between the withdrawal piston until the mold sections are separated from the casting and then a valve can be operated to bypass this device for flow division with a smaller volume to a to accomplish faster synchronized retraction of the withdrawal pistons into their respective cylinders under the control of the flow splitting device with the higher volume.

The following is a description of the processes already in connection with FIG. 1 briefly mentioned mandrel arrangement 13 (bogie). This is formed from a spoon 14, an expandable mandrel 15 and a Lubricant spray head 16. These protrude outwardly from an upwardly extending central rod 120 are angularly offset from one another by 90 ° axial adjustment position of each of the outwardly protruding Components with the assembled shape possible by rotating the central rod. The spoon 14 generally includes a cylindrical vessel 121 having a ceramic liner 120 and a metallic liner outer fairing 123. Conventionally, along the top of the spoon is a rectangular one Port 124 is provided for receiving and dispensing molten metal from the spoon and the spoon is on a rotatable shaft 125 mounted for tilting the spoon for dispensing molten metal from the Allow spoons. A back plate 126 is also located between the bucket and the rotatable shaft 125 This fits over the opening 127 in the hood assembly 128 and that is how it is rotating mold 21 while pouring the molten metal into the mold completely enclosed.

Tilting of the spoon to pour molten metal is accomplished using the mechanism 129 for rotating the spoon (see Figures 10 and 11). This mechanism generally includes a hydraulic cylinder 130 mounted inside the mandrel assembly for driving a rack 131 which meshes with a gear 132 fixedly attached to the rotatable shaft 125 of the bucket Hydraulic pressure source 133 operated by a commercially available solenoid operated control valve 134. However, in order to obtain optimum quality in the finished casting, the rate of angular displacement must be varied during the pouring of the molten metal into the centrifugal casting mold 21. This variable speed of adjustment is obtained by a tapered cam disc 135 (see Fig. 11), which is in ⁰ TiFf with the control unit ^ 3 ^ ^ ü ^r Ha ^ valve 134 to change the opening in the valve. This increases the speed of angular adjustment of the bucket in the initial part and

65 causes the end part of a casting process in comparison to the middle part of this process (see curve in FIG. 12). Therefore, instead of using a continuous speed of angular displacement of the spoon, the casting machine according to the invention uses a fast speed for tilting the spoon in the initial part of the operation of pouring the molten metal from the rectangular opening 124. The tilting speed of the spoon becomes gradually along the curve a so long until about half of the molten metal in the spoon has been released into the rotating mold. Then the speed of the. Tilting the spoon along curve b is increased until the tilting speed at the end of the casting process is approximately the same as the speed at the beginning of the casting process.

By changing the tipping speed for the bucket in the above manner, the volume of the Metaiis released from the spoon per unit of time essentially constant during the entire casting cycle and the quality of the cast structure is improved compared to cast structures, which are obtained by tilting the spoon at a uniform speed. Generally will the maximum speed of the bucket adjustment and the change in this speed can be varied, d. H. depending on such factors as the size of the rectangular opening in the spoon that The height of the molten metal in the spoon, the internal shape of the mold, etc. The appropriate values are best determined empirically for each frame size to be poured through a particular spoon

The expandable mandrel 15 generally includes four circular arc-shaped sections 137 (see FIGS. 13 and 13) 14). These are mounted on claws 138 which have soft lips 138a which are slidably tapered in engagement Grooves 139 of a cruciform center post 140 are. Each of the spokes 140a-140c / center bar 140 however, four hydraulic cylinders 141 individually drive corresponding pistons. on in this manner, each of the arcuate segments 137 is securely engaged with the inner one Surface of the cast structure brought, bc \ or a Pressure switch, not shown, in the hydraulic line of each piston cylinder, the radial expansion of the arc-shaped segments terminated. A conically tapered nose portion 142 is also on the the end of the top dome remote from the central rod 120. This is inside the base 143 in the face plate 120 held during the withdrawal of the mold sections from the casting. To this Way, both ends of the mandrel are held and there will be a deflection in the form of a one-sided lever arm for the mandrel as a result of an unequal Distribution of the force from the pulling device 48 is prevented

To avoid excessive adhesion between the casting and the overlying mold sections To prevent this, the mold sections should be checked with a commercially available one before each casting process Lubricants are sprayed. The spraying is preferably carried out in the automatic casting machine accomplished according to the invention in that the spray head IS to the night position with the mold sections is rotated and is pushed in the longitudinal direction into the interior of the mold sections to this Spraying sections in their open position; d. H. the shaped sections are radially outward

pulled by retracting the pistons 102 into the cylinders 105. Air valve 144 depicted in FIG. 15 controls the pressure on the reservoir 145 for the lubricant and is activated by the limit switch 1690 open along the lane of the carriage. The spray head sprays the interior of the mold sections when entering the same, in order to ensure complete coverage of the interior of the mold. It has generally been found to be necessary to spray the mold sections in an open position in order to sufficiently close the axially opposite edges of the mold sections cover and excessive adhesion between the mold sections and about during the casting there to prevent molten metal from entering. Although the spray heads 16 for spraying the inner Surface of the mold sections with lubricant preferably on the mandrel assembly 13 for the purpose Achieving full automation of the

GiCL) VuFgäügcä ucicSügi WcTucü, could uo3 uu

hen the mold sections with lubricant iiuch if desired, can be carried out in that a Hand spray along the mold sections is directed or that the form section 3: 11m Apply a lubricant with a suitable brush.

As can be seen from Fig. 16, the central rod 120 is axially supported on the main turntable 146. A plurality of bearing pedestals 147 are attached to the lower end of the central rod and serve on the one hand to support the central rod against bending forces; they also provide a platform for mounting the cam 148 to control the speed of the turntable. A circular ring 149 is attached to the lower circumference of the turntable and serves both as a holder for the turntable and as a bearing surface for supplying the torque to the turntable from the hydraulic motor 150 (see also FIG. 18). As a result, the turntable is rotated on the bearings 151, which are arranged between the circular ring and the adjacent ring bracket 152. The bracket 152 has a substantially L-shaped shape. In this way, an enlarged surface is obtained in order to fasten this ring bracket to the platform 153 of the carriage 17. A radially outwardly extending portion of the bracket has a lip extension 154, ^r around the K Eisring to hold in a fixed radial position 149th Composite bearings of the above type are commercially available and can be obtained, for example, from Rotek, Inc. of Ravenna, Ohio.

The speed of rotation of the main turntable 146 is controlled by the valve 155 (see Fig. 17). This regulates the supply of hydraulic fluid to a hydraulic motor 150 of conventional design which is firmly attached in a vertical position by a bracket 156. As can be seen from FIG. 17, has the cam 148 to control the valve 155 three arcuate segments to the speed of the hydraulic motor 130 from standstill to maximum speed by controlling valve 155 so for a long time to gradually increase until the desired outward-facing component is approximately in is in the correct position to the shape. Then the flow of hydraulic fluid to the engine is gradually loan finished to stop the engine. To ensure that the position of the To bring the component on the mandrel 13 with the mold, three brackets are along the outer circumference of the turntable 157 attached with angular grooves 158. These take the conical nose part 159 of the piston of the hydraulic cylinder, which runs along the carriage 17 in such a position is fixed that he the mandrel assembly 13 in a correct positional correspondence with the Bringing shape, therefore, with the introduction of the front end of the tapered nose part

ίο into the triangular groove in bracket 157 precise mechanical positional correspondence between the outwardly extending component obtained on the center rod 120 and the mold 21. A pair of limit switches 161 (see Fig. 19) are driven by the piston of the hydraulic Actuated cylinder 160 and are used to display the position of the conical nose portion 15S relative to the groove in the bracket The conically tapered cam disc part 148 also serves as a holder for three guide surfaces.

C- 20 Ciicn iu £ ^ aiciic f ig. ι s UHu ^ v ^. i ^ riCaC alliu CnuoHg uC5

Perimeter of the turntable attached at different heights, to operate on the conventionally three border cladding 163 and to display the degree of rotation of the turntable.

As can be seen from Figs. I and 16, the entire Mandrel arrangement 13 fastened on a carriage 17 with the aid of commercially available bearings 164 this rests on rails 18 running in the longitudinal direction. In order to give the carriage 17 a movement, is the front end of the carriage via a bracket 165 to the front end of the piston 166 of the Hydraulic cylinder 167 connected, which in turn is firmly attached to the base part 35 is also a Baffle bar 168 is attached to one side of the carriage assembly and is used to support a variety of Trigger limit switches 169a to 169c. These are arranged along the path of the carriage 17 to control the length of the path and the sequential operation as explained below of the machine.

The sequential operation of the casting machine is described below in connection with the flow diagram of Fig.21 explained First, the spoon 14 is through a suitable measuring device, not shown, filled with an amount of molten metal soft proportionally is the size of the frame to be cast. Measuring devices for measuring in a spoon The amount of molten metal introduced are known per se and are generally based on the Principle of positive displacement of the molten metal using gravitational flow or on pumping the molten metal from a reservoir below for molten metal to the higher mounted spoon. However, any known system can be used for Transferring liquid metal to fill the spoon 14 can be used. At this point will be the peeling and assembling cylinders 105 also operate to move the mold sections 21a to 2Iu * radially inwards approximately cylindrical shape. The hydraulic cylinders 75 are then actuated to axially move the locking rings 84 To pull over the conical surfaces of the form gripping claws 86 and the form firmly with the face plate 20 to associate. Then the hydraulic cylinders 109 for controlling the locking pins 110 of the target device actuated. To bring the two-part parts 107 out of engagement with the mold sections. After this

Withdrawing the plunger into the cylinder 105, the main drive motor 19 is switched on to the mold to rotate at a speed of about 500 revolutions per minute. At this point the Flow of liquid coolant triggered through the mold assembly to ensure that when then pouring the metal into the mold, the molten metal rapidly solidifies.

After filling the spoon 14 with the desired amount of molten metal is complete has been (this termination is determined by an ordinary weight-actuated Switch or a timer), the valve is used to control the flow of hydraulic fluid actuated to the hydraulic cylinder 167 in order to retract the spoon 14 in the axial direction into the mold 21. Thereafter, the hydraulic fluid in the cylinder 130 to control the rack 131 let in to pour the molten metal into the rotating mold. After rotating the shape for a specified period of time which allows the molten metal to be centrifugally cast, for example for about one minute for a motor frame with a diameter of 250, the Form 21 stopped by dynamic braking of the main drive motor 19. After that, the little one Drive motor 50 switched on to slowly rotate the mold until the projection or attachment part 49 is in a matching position with the touch switch 43. The shape is then in their Locked position that the tapered piston of the hydraulic cylinder 22 in a suitable groove in the Facing disk 20 is advanced. The cathedral arrangement 13 is next returned by hydraulic cylinder 167 along rails 18 to remove the spoon 14 from the mold 21. Then the mandrel assembly is rotated further into such a position, that the mandrel 15 comes in accordance with the shape. This is done by feeding hydraulic fluid to the motor 150, which continues until the corresponding limit switch 163 on the circumference of the turntable the flow of hydraulic fluid to the hydraulic motor stopped precise position adjustment of the turntable 146 by pushing the conical nose part 159 into the Angle groove in bracket 157, the hydraulic cylinder 167 is actuated again to move the mandrel assembly in the direction to move the mold and insert the expandable mandrel 15 axially into the mold. The mandrel 15 is then radially expanded or expanded by hydraulic fluid in the cylinder 141 to Control of the longitudinal movement of the center post 140 is introduced so that the circular arc-shaped Segments 137 bear against the inner surface of the casting. After the pressure switch in the hydraulic Lines to the hydraulic cylinders 141 make contact between the respective circular arc-shaped Indicate segments on the mandrel 15 and the inner surface of the casting, the hydraulic cylinder 105 of the pulling device actuated to the two-part parts 107 in engagement with the Bring pulling bars lOi along the outer surface of the pulling claws. This will bring up the locking pins 110 driven through the aligned openings in the drawbars and the two-part parts 107, In order to lock or close the pistons 102 of the pulling device with the individual mold sections connect / Then the locking rings 84 are released from the claws 86 by being inserted into the cylinders 75 hydraulic fluid is admitted to drive the pistons 79 outward. The pistons of the Main pullers are pulled radially outward, i. H. into the hydraulic cylinders 105 to at the same time pulling off all four mold sections from the casting (the casting is in its position through the extended mandrel 15 held inside the casting). The mandrel assembly 13 is as next retracted by hydraulic cylinder 167 and hydraulic motor 150 is again actuated to the spray head 16 in coincident position with the axis of the expanded Bring mold sections. After precise adjustment of the spray head 16 with the mold sections through Insertion of the conical nose part 150 into the bracket 157 and after removing the given one In the frame of the attachment mandrel 15, the mandrel device 13 is again in the direction of the mold sections preferred to introduce the spray head 16 into the same. With the entry of the spray head 16 in the mold sections is controlled by the limit switch i69 £> the valve 144 is opened. This puts pressure on the lubricant reservoir 145 in order to displace the lubricant spray along the inner surface of the mold sections. Then the spray head 16 is from the inside removed from the mold and rotated the mandrel assembly 13 to match the position of the tray with the mold, a second casting process can be triggered after the sequence described above.

The electrical control of the spin-casting machine for carrying out the method according to FIG. 21 can be achieved using any commercially available controls by sequential switching, for example by a commercially available step switch or control with the aid of a wired program. However, a particularly preferred control system for the casting machine is shown in FIG. 22 shown in simplified form It generally comprises a sequence circuit using interlock relays or latching relays to prevent the failure of the sequence in the event of a power failure in the system. The system uses a direct current source for 120VoIt which is switched via the connections 200 and 201 and allows the power supply to all sequence circuits.The casting cycle is triggered by pressing the start button 203 and switching on the relay coil XK, if all preconditions are functional. For example, it will

Assuming that the hydraulic system is able to work to close the contacts H, the liquid coolant in the main source 31 flows to close the contacts C , the lubricating oil flows to close the contacts L in the housing arrangement 72, the aluminum pump circulates to close the Contacts A is connected, etc. The connection of the relay coil XK then closes the contacts XK 1 (contacts actuated by the individual coils are given a designation which contains the first two reference characters of the controlling relay coil), for the connection of the coil lK < the diodes D 1 and Z? 2 above the coils \ K and IK each result in a time delay for each coil, so that the contacts XK are closed about 35 milliseconds after releasing the strong button 203

remain and the contacts 2K \ remain closed about 26 to 35 milliseconds after switching off the relay coil 2K by the contacts XKX. In the interval after switching off the coil iK and before

the failure of the relay coil 2K, ie in the period in which the contacts IK 2 and 2KX are both in their closed positions, the relay coil XLKL is switched on to trigger the automatic pouring process. The connection of the coil XLKL closes the contacts ILA: 1 for the connection of the relay coils 2LK 1, 3LK 1 and ALK 1 (via the diodes D 3 to D 5, which inhibit circulating currents) for the inlet of hydraulic fluid to the hydraulic cylinders 105 or 75 and 160. This is used to pull the pistons 102 back into the cylinder 105, to advance the locking rings 84 in the direction of the face plate 20 and to lock the mandrel arrangement 13 in its position. After the limit switches 116, 88 and 161 (these measure the distance by which the pistons have moved out of the hydraulic cylinders 105, 75, 160) are closed, the main drive motor 19 is switched on in order to rotate the mold. This is done by connecting a relay coil SLKL By connecting the coil 6LKL for controlling the measurement unit used to pump the molten aluminum into the spoon aluminum is pumped into the tray 14, the engagement of the coil 6LKL also includes the contacts 6LK 1 for connection of the coil 1 LK V Via the diode D 6 and to open the locked relay coil XLKL Nixhdem the timer 7S (this is set to the time required for the aluminum to flow out of the tubes into the spoon) closes, the relay 7LKL is activated via the closed contacts 6LK 1 and the timer is switched on and opens the valve for the inlet of hydraulic fluid ^; In the hydraulic cylinder 167 for the purpose of advancing the mandrel assembly 13 along the rails 18 and Eiiiiühn: ~ .g of the spoon M into the rotating mold. When the spoon has reached the end of its feed movement, measured by the limit switch 169c, the relay coil SLKL is switched on through the closed contacts TLK 1 and the limit switch 169c molten aluminum from the spoon into the rotating hair dryer. Closing the contacts 8LK 1 by the coil 8LKL also unlocks the coil 7LK 1 by connecting the coil 7LKV via the diode D7. Although each sequential actuation of a spool in FIG. 22 contacts for unlocking a previously connected coil, such unlocking coils work similarly to the mode of operation of the coils XLKV and 7LKV ( described above) and they are therefore omitted for clarification in the description of the rest of the formwork. After the molten aluminum has been completely poured into the rotating mold (this is determined by the limit switch 170, actuated by the rack 131), the relay coils 9LKL \ 0LKL and XXLKL are switched on to actuate a timer (not shown) to control the duration of the connection of the drive motor 19 This rotates the spoon to its original upright position and is withdrawn from the interior of the mold by admitting hydraulic fluid into the hydraulic cylinder 167. The hydraulic cylinder 116 for controlling the introduction of the conically shaped nose piece 159 in the bracket 157 provided with angled groove is then actuated to unlock the main turntable 146. This is done by switching on the relay coil YlLKL via the closed contacts XXLKX and the limit switch 169a at the end of the path of the Carriage 17. In a similar way, the relay coil XZLK X is switched on via the closed contacts IOLAT 1 and the limit switch 169a in order to pull the locking pins 110 out of the two-part arrows 107 of the pulling claws. After the radial retraction of the extended claws on the mandrel 15 (ie by closing the contacts 13L / '1 to connect the coil XALKL to control the

ι ο inlet of hydraulic fluid to the cylinders 141) the contacts 13 LK 2 and the switch P inside the hydraulic lines of the cylinder 141 are closed. This makes the X5LKL coil to control the inlet of hydraulic

Fluid is closed to the hydraulic motor 150 and the mandrel assembly 13 is rotated to bring the expandable mandrel 15 into registry with the rotating shape. When the coil X5LKL is switched on, the contacts 15LK1 are also closed and after the associated limit switch 163 is closed by the guide surfaces I62 on the main turntable, the coil 6LKL is switched on in order to let hydraulic fluid into the cylinder 160 and the conical nose part of the cylinder piston into the retract the conical groove of the bracket 157 on the turntable. When the coil X6LKL is switched on, the contacts 16LK 1 are also closed and the relay coil \ 6LKL for controlling the braking of the main drive motor is switched on by closing the timer TSi when the mold turning cycle is running

After the mold has finished rotating (this is determined by the proximity switch 42), the relay coil 18LKL is actuated to trigger the connection of the small drive motor 50. This remains switched on until an output signal is generated by the proximity switch 43 to switch on the relay coil 19LKL and thus to switch off the small drive motor. In a commercial embodiment of the invention, it is generally desirable to provide a circuit, not shown, by which it is ensured that at least one rotation of the mold by the drive motor 50 takes place over half a period. This prevents the pull pistons from being actuated by the fact that the elevations or lugs 49 stop adjacent but not exactly in accordance with the proximity switch 43. After locking the drive motor in its position to prevent further rotation of the mold, i.e. by connecting the relay coil 20LKL via the contacts 19LK 1 and the timer TS 2, the pistons 102 are used to pull off the mold by admitting hydraulic fluid into the cylinders 105 extended. This is done by connecting the coil 21 LKL via the closed contacts 20LK 1 and a limit switch LS ", which monitors the locking of the main drive shaft by the hydraulic cylinder 22. Simultaneously with the extension of the piston 102 to remove the mold, the relay coil ZlLKL is the inlet of hydrauli shear liquid in the cylinder 167 is switched this way, the mandrel assembly 13 at high speed is moved forward to bring the top mandrel 15 in its position in the interior of the casting * Upon actuation of the limit switch is 169c ami end of Läufweges the mandrel assembly 13 via the contacts ULK 1 and the limit switch actuates the coil 23LKL for simultaneous inlet hydraulic

Liquid in the four hydraulic cylinders 141 to expand the mandrel 15. Then the pulling pistons 102 are locked with the pulling bows 101 of the gripping claws 86, that the coil TALKL is switched on for the inlet of liquid into the cylinder 105 when the pressure switch P ' is closed inside the hydraulic lines of the cylinders 141 for controlling the expandable mandrel. The connection d «, r coil TALKL also closes the contacts TALK 1, and when the limit switch 117 is actuated in a closed position through the guide surface 118, hydraulic fluid is let into the cylinder 109 (this is done by connecting the coil T5LKL, which is the inlet valve for controls the liquid to the cylinder). As a result, the locking pins 110 are pushed through the aligned openings in the two-part part 107 and the pulling bow 101. The limit switch 112 is then closed by the locking pins 110 which connect the trigger cylinder to the mold and the Reiaisspuie InLKL is switched on to admit hydraulic fluid to the cylinder 75 for removing the locking rings 84 from the gripping claws 86. After the corresponding limit switch 88 on the housing arrangement 72 has been closed, the relay coil TILKL is switched on via the closed contacts 26LK 1 and the limit switch 88 for the inlet of hydraulic fluid into the extraction cylinder 105 for stripping the mold sections on the casting. When the limit switch 116 is closed by the guide surfaces 118 on the guide rods 115 on the piston platform, the coil TSLKL is switched on for the inlet of hydraulic fluid to the hydraulic cylinder 167 and for pulling the mandrel assembly and the casting from the inside of the stripped mold sections. At the end of the travel path of the mandrel arrangement, which is determined by the limit switch 169a, the coil ISLKL is switched on via the contacts 28 LK 1 and the switch 169a. As a result, the turntable 146 is unlocked by pulling the piston with the conical nose part back into the cylinder 160. When the piston is withdrawn (this is determined by the corresponding limit switch 161), the relay coil 30 LKL is connected via the closed contact 29LK 1 and the limit switch 161 for the inlet of hydraulic fluid into the hydraulic motor 150. This rotates the mandrel assembly 90 ° clockwise and brings the spray head 16 into alignment with the expanded mold sections. When the corresponding limit switch 163 is closed by the guide surfaces 162 on the main turntable, the relay coil MLKL is actuated by the closed contacts 30LK 1 and hydraulic fluid is let into the cylinder 160. This will advance the nose piece 159 into the groove 158 to lock the mandrel assembly in place. The activation of the HLKL coil also pulls the mandrel back. That is, by closing the contacts 3ILK 1 to connect the coil 32LKL , the inlet of hydraulic fluid into the cylinders 141 is controlled and the cast frame carried on the mandrel 15 is allowed to be removed by suitable means, for example a Conveyor. If the bogie is locked in such a position that the spray head 16 is in correspondence with the expanded mold sections, then the limit switch 161 for connecting the relay coil 33LKL is closed via the closed contacts 32LK1. This admitted liquid to the hydraulic cylinder 167 to again advance the mandrel assembly towards the mold sections. When the limit switch 169i> closes, the coil 37LKL is switched on and, by actuating the valve 144, the lubricant supply 145 is pressurized to spray the lubricant onto the surfaces of the mold sections when the spray nozzle is retracted. At the end of the travel path of the mandrel arrangement (determined by the limit switch 169c,) the coil 35LKL is switched on via the closed contacts 3ALK 1 and liquid is let into the hydraulic cylinder 167 to move the mandrel arrangement back from the mold sections. At the end of the retraction of the mandrel arrangement 13 (determined by the limit switch 169aj we! The relay coil 3SLKL switched on via the closed Koniaxt ' 35LK i and the limit switch in order to let hydraulic fluid into the extraction cylinder 105 and to push the piston 102 radially inwards and thereby the To close FoIT _1. The relay coil 37 LKL is also switched on at this target point in order to unlock the main turntable 146 by pulling the conical piston back into the cylinder 160. Closing the border switch 117 shows the opposite position of the mold sections through the extraction cylinder and it the coil 3SLKL is then switched on. This advances hydraulic fluid into the hydraulic motor 150 to rotate the turntable, thereby bringing the spoon 14 into alignment with the assembled mold again. When this alignment is achieved (determined by the corresponding limit switch 163), then the coil 39LKL is switched on via the closed limit switch 163 and the contacts 3SLK 1 to let hydraulic fluid into the cylinder 160 and to push the conical piston into the groove of the bracket 157. After the turntable has been locked in its position (this is determined by the limit switch 161), the coil AQLKL is switched on via the closed contacts 39LK 1 and the limit switch for the inlet of hydraulic fluid into the cylinder 75 and for pulling the conical locking rings 84 over the conical ones surfaces of the gripping claws 86. If the locking ring is seated fully on the gripping jaws, this is detected by the limit switch 88, and ^{c is} the R! aisspule 41LKL is through the closed contacts 40LK 1 and the limit switch is switched to the inlet of hydraulic fluid in the K.oibenzylinder 109 and to unlock the cylinder for pulling the mold from these claws. Then, the Abzugsfcolben 102 are withdrawn, that is by connecting the opule ATLKL for controlling the inlet voii hydraulic fluid into the piston cylinder 105 after closing the Grenzschaltejs 113. The system is now ready Ziirn beginning of a new cycle by re-connection of the coil \ LK 1 via the contacts 42LK 1 unless the frame counter FC remains interrupted and indicates that the desired number of motor frames to be cast has already been completed.

15 sheets of drawings

Claims (10)

Patent claims: 1. Horizontal centrifugal casting machine with a face plate that can be driven in the direction of rotation, with which a centrifugal casting mold that can be dismantled into sections can be connected, and with a device for pouring molten metal into the mold during the rotary movement, characterized in that the mold sections (2la-d) each are attached to a displacement device (86) which, when the mold is assembled, engages its sections with one another and for a rotary drive with the face plate (20) so that a receiving mandrel (15) can be axially inserted into the casting by means of a drive device (13, 17) and that the mold sections can then be pulled off the casting by the displacement device (86). 2. Horizontal centrifugal casting machine according to claim 1, characterized in that at least a part (137) of the receiving mandrel (15) radially «Is extensible on the outside. 3. Horizontal centrifugal casting machine according to claim 1 or 2, characterized in that the Pick-up mandrel (15) and the pouring device (14) for the molten metal at an angle to one another are arranged offset on a common vertical axis of rotation (120) and on corresponding Way can be introduced radially into the mold. 4. horizontal centrifugal casting machine according to claim 1, characterized in that relative to the mold (21) axially versi.hiebba · conical locking rings (84) are provided for clamping the mold sections. (21a -) axially outwardly tapering conically Peripheral surfaces (85a, b) of the mold sections can be pressed. 5. Horizontal centrifugal casting machine according to claim 4, characterized in that the axial feed force of the axially inner and outer locking rings (84) is cushioned by springs (92) to compensate for the radial pressure exerted on the mold sections (21a-d). 6. Horizontal centrifugal casting machine according to claim 3, characterized in that on the axis of rotation (120) in addition to the radially expandable receiving mandrel (15) and the casting device (14) offset at an angle to these a lubricant spray head (16) is arranged, the before the mold sections (21a-d) are joined together, they can be guided axially along them. 7. Horizontal centrifugal casting machine knach one of claims I -6. characterized in that the cylindrical casting mold (21) is formed from four arcuate sections (2 \ a-2 \ d) which have axially essentially parallel grooves, that the device for pulling off the mold sections (2 \ a-2 \ d) the casting comprises a gripping device (07, 101) for firm engagement with the radially outer surface of each of these four sheet sections, as well as grooves (102, JOS) to hold the gripping devices (107, 101) for pulling off the mold sections (21a- 2 \ d) to actuate simultaneously from the casting by exerting force perpendicular to the axis of the cylindrical casting mold (21). 8. A method of centrifugal casting of ribbed cylindrical castings, in which numerous arcuate mold sections to form a horizontally arranged cylindrical Form can be placed, poured into the molten metal and then with a predetermined Rotational speed is rotated, characterized in that a receiving mandrel is axially aligned is aligned with the casting, inserted therein and expanded radially outward to a tight engagement with the inner surface of the casting that the arcuate mold sections be withdrawn radially outward from the casting and that the casting on the receiving mandrel sitting is pulled axially out of the separate mold sections. 9. The method according to claim 8, characterized in that the inner surface of the withdrawn Mold sections in the open position is sprayed and then the Formabschniue radially moved inward to form a cylindrical shape for subsequent casting. 10. The method according to claim 9, characterized in that one corresponding to the casting Amount of molten metal is poured into a ladle device used for pouring off the molten metal tipped into the mold, axially pulled out of the mold and together with the receiving mandrel is rotated about a common axis of rotation so that the attachment mandrel is axially is arranged in alignment with the casting.