US3842900A - Device for automatically casting of molten material - Google Patents

Device for automatically casting of molten material Download PDF

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Publication number
US3842900A
US3842900A US00347829A US34782973A US3842900A US 3842900 A US3842900 A US 3842900A US 00347829 A US00347829 A US 00347829A US 34782973 A US34782973 A US 34782973A US 3842900 A US3842900 A US 3842900A
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United States
Prior art keywords
mold
molds
station
pouring
carrier
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Expired - Lifetime
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US00347829A
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English (en)
Inventor
A Noisser
G Nowak
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GRAVICAST PATENT GmbH
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GRAVICAST PATENT GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D47/00—Casting plants

Definitions

  • a device for automatically casting molten material comprises a pouring station having a pouring nozzle.
  • a further station is provided for discharging or preparing each mold for the following casting operation.
  • the device further comprises a carrier means constituted by two carrier members each of which is rotatable around a vertical pivotal axis.
  • Each carrier member comprises at least two cantilever arms relatively dephased for equal angles and radially extending from the axis. These arms carry the molds.
  • the radius of the enveloping line of the circular pathes of the molds and the cantilever arms is smaller than the distance between the two pivotal axes.
  • Each carrier member rotates always in the same direction, but the one carrier member rotates in the opposite sense with respect to the other carrier member.
  • the pathes of travel of the ingates of the molds intersect one another at two intersecting points, at the area of one of which the pouring station is arranged, whereas at the area of the other intersecting point the further station is arranged.
  • the cantilever arms alternately pass the two intersecting points.
  • the invention refers to a device for automatically casting molten material, particularly metal melts, in which at least two molds are successively moved into a common pouring station, are filled there with molten material and then are again moved away. In at least one further station each mold is discharged, prepared for the following casting operation and, if desired, provided with cores.
  • the molds are stepwisely guided between these stations along two circular arcuate pathes of travel by carrier members each of which is rotatable around a vertical axis and comprises a cantilever radially extending from the respective axis and carrying the mold.
  • the radius of the enveloping line of the circular arcuate pathes of the molds and the cantilevers is smaller than the distance between said two axes.
  • the oscillating movement of the cantilever arms does not only require a drive means of increased power but is also a hindrance for a smooth production cycle, particularly when manufacturing castings in great series.
  • the invention now aims at avoiding these drawbacks and to improve a device as described above such that with only low space requirement and low constructional expenditure the device will reliably work. Before all, it is intended to provide for a high speed when changing the position of the molds and to keep low the masses to be moved.
  • each carrier member comprises at least two cantilever arms relatively dephased for equal angles, in that each carrier member is arranged for rotation in only one sense of rotation but that these two carrier members are arranged for intermittent rotation in opposed senses of rotation and in that the pathes of travel of the gatings of the molds are intersecting one another at two intersecting points at the area of one of which intersecting points the pouring station is arranged whereas at the area of the other intersecting point another operating station is arranged.
  • the cantilever arms pass each of said intersecting points alternately.
  • the invention thus provides a device for automatically casting molten material having the smallest possible compact construction.
  • the production rate may thus be doubled without providing a second station for inserting cores into the mold.
  • lt would also be possible to take up a mold at the second station located at the point of intersection of the pathes of travel of the gatings of the molds, to connect there the mold to the cantilever arm, then to move the mold to the pouring station and to place the mold at the pouring station and then to lift the filled mold and to move the filled mold to a subsequent station and to let fall down the mold there.
  • the molding boxes may be recycled to the molding equipment by means of a conveyor belt.
  • An alternate mode of operation consists in removing the base part of a new sand casting mold from the molding equipment at an operating station located before the core setting station and clamping this base part to the cantilever arm, then moving the base part to the core setting machine, then inserting the core into the mold, then placing the second half of the mold from above on the base part and then keying both mold halves, whereupon the working steps described above (transport, mold filling, placing of the mold and recycling of the mold halves) are repeated.
  • a device has the additional advantage that when replacing a mold of one type by a mold of another type one of said both carrier members may be further operated while the other of the carrier members is readjusted, i.e., provided with other molds.
  • production can be continued by using the other carrier member while repairing the first mentioned carrier member.
  • the drive means for the carrier members becomes more simple than for the mentioned known device.
  • a device according to the invention can much more easier be automated than the known device described above. This is of particular advantage with devices intended for high production rates. Highly effective pouring equipments are readily available and also setting of the cores into the mold can be effected in a very rapid manner so that it is a prime demand to accelerate the transport velocity between the single operating stations.
  • the invention provides essential advantages when using molds for producing castings of approximately the same weight because the small masses to be moved allow for a rapid changing speed such that the rapid sequence of pouring operations and core setting operations can fully be made use of.
  • a device according to the invention is of advantage also in such plants in which the molds are filled manually or automatically by means of bailers.
  • the number of operators required for manually operated plants can be reduced because the circular pathes described by the molds carried by said both carrier members are intersecting at two points and thus the pouring station is common for both carrier members as well as a further operating station, particularly the core setting station.
  • the invention also provides advantages over stationarily arranged guideways along which the molds are shifted (so-called standways).
  • standways a plurality of sandmolds or permanent molds is to be moved so that the masses to be accelerated are essentially greater than in a construction according to the invention.
  • the station time in a standway is much longer than in a device according to the invention so that the number of castings produced per unit of time is much greater than when using a standway.
  • each carrier element is provided with two cantilever arms carrying molds and symetrically extending from the pivotal axis of the carrier member in opposed directions, noting that said cantilever arms are intermeshing like combteeth.
  • a means for lifting and, respectively, lowering the molds This arrangement results in the advantage that any abrasive action of the mold on the front face of the pouring nozzle is avoided, which abrasive action might injure the front face of a pouring nozzle.
  • the mold can be rested onto the pouring nozzle with such a pressure that the desired seal between the mold and the pouring nozzle is realized.
  • the mentioned arrangement further allows penetration of the solidification front of the melt relatively deep into the pouring nozzle after each pouring operation, so that on lifting the mold, particularly permanent mold, a plug is drawn out of the pouring nozzle, in which plug the oxidation products are accumulated. This results in a very clean and sound surface of the casting and thus in a casting of high quality.
  • the mold is arranged on a mold carrier which is arranged for swivelling movement around a horizontal axis and removably connected to the carrier member.
  • the mold can be lowered onto the pouring nozzle and. respectively, lifted from the pouring nozzle in particularly a simple manner. Furthermore production may easily be changed over from one type of mold to another type of mold by interchanging the mold carners.
  • each mold may be arranged with the front face of its ingate passage, which front face cooperates with the pouring nozzle, with the same distance from an index stationarily arranged on a carrier element.
  • FIG. 1 represents a device according to the invention, partially in front elevation and partially in section and FIG. 2 represents a top plan view of a device according to FIG. 1.
  • the inventive device for automatically casting molten material comprises two carrier members 2, 3 formed of turntables and being arranged for rotation around vertical axes 1. These turntables are carrying cantilever arms 4 which are mounted for swivelling movement around horizontal axes 5 supported by the turntable. Each of said cantilever arms 4 forms a mold carrier.
  • a hydraulic unit 6 comprising two cylinders is provided and supported against a rack 7, on the one hand fixed to the turntable and on the other hand supported against an angled lever 8 which is mounted for swivelling movement around the axes 5 supported by the rack 7.
  • a frame 9 is rigidly connected to the angled lever 8 and the frame 9 is connected to the cantilever arm 4 by means of an easily releasable socket connection.
  • the mold carrier (cantilever arm 4) is provided at its side opposed to the mold 27 with eyes 29 being in alignment with correspondingly shaped eyes of the frame 9, noting that the connection is secured by bolts 30 inserted into the eyes.
  • Each mold carrier comprises a plate-like base member carrying two protruding arms 10, 11, in their turn carrying the mold halves l2, 13 of the mold 27.
  • drive means 31, f. i., electromotors are provided on the angled lever 8 and, respectively, the frame 9, noting that these drive means 31 are connected, via releaseable clutches, with gearings located within the base member of the mold carrier.
  • the cantilevers for forming the mold carriers can thus easily be removed from the frame 9.
  • Each of the turntables is driven by a motor 16 via a gearing constituted by a worm wheel 14 and a worm 15.
  • the one turntable is rotated in direction of arrow 17 and the other turntable is rotated in direction of arrow 18.
  • the two turntables are thus rotated in opposed senses.
  • Each of the mold l2, 13 is thus moved along a circular path of travel.
  • the distance between the pivotal axes 1 of the turntables is smaller than the double length of the radius as measured from the centre of the mold gating to the centre of axes 1 so that the circular pathes of travel described by the gatings of the molds l2, 13 are intersecting one another at two points 19, 20.
  • a pouring equipment 21 is provided so that at this point the pouring station G is located.
  • the pouring equipment preferably has a storage chamber for the melt to be cast and for supplying melt via a stopper valve into an equalizing chamber within which the flow melt is calmed such that the melt can flow in a laminar stream from the equalizing chamber into the pouring nozzle directed in upward direction.
  • the equalizing chamber is conveniently formed of the interior of a tube which is at least partially arranged within the storage chamber and is circumcirculated there by the melt.
  • Such constructions are for instances discolosed in Austrian Patent No 285 840 and in German printed Patent Application No. 2,142,717 and provide the advantage that the melt is always maintained in a liquid condition within the pouring nozzle and is always ready for pouring operation and that a great number of castings can be produced per unit of time.
  • a core setting station E is provided at which insertion of the core into the mold 27 is manually or automatically effected.
  • the molds 27 are rotated in direction of arrows 17, 18 for angles of 90, each according to a synchronized program.
  • a core can be inserted into a mold while the other mold is in the casting station and filled with melt.
  • the mold 27 After terminating the pouring operation for the mold 27 just located at the pouring station G, the mold 27 is lifted off the opening of the pouring nozzle by correspondingly actuating the hydraulic unit 6 and thus correspondingly swivelling the cantilever arm 4. Subsequently the turntable 2 is rotated for 90 in direction of arrow 17 so that the mold 27 is brought into the discharge station A in which the casting is discharged by opening movement of the mold halves 12, 13. Subsequently a nozzle 22 for cooling liquid is extended from below between the mold halves l2, 13 being in opened position, said nozzle 22 being arranged on a carriage travelling on rails 24.
  • a follower 23 connected to said nozzle 22 is provided for moving the cooling nozzle equipment together with the mold from station A into station S where cooling of the mold halves 12, 13 is completed.
  • a full station time i.e., the time interval required for rotating the mold for an angle of 90, is at disposal for the cooling operation.
  • the mold While moving the mold 27 from station A into station S the mold can also be given a blackwash.
  • the follower 23 is moved downwardly and the carriage, together with the cooling nozzle 22, can then be returned to its starting position (station A) by means of a drive means of any suitable construction, f. i., a weight loaded tackle being connected with the carriage. ln starting position the cooling nozzle is ready for repeated actuation after discharging the next molds.
  • the molds moved by the carrier member (turntable) 3 are moved through the same stations as the molds moved by the carrier member (turntable) 2, noting thatonly the sense of rotation along the circular pathes of the mold is different. Both turntables are timed such that the molds l2, 13, 27 are alternately passed through pouring station G and core setting station E, so that always one mold of the turntable 3 is followed by one mold of the turntable 2, and vice versa.
  • the molds are conveniently not only moved in a stepwise manner along the circular path of travel but are also brought at the individual stations and, respectively,
  • the junction plane of the mold half 12, 13 is in a vertical plane at the pouring station G, and this position of the junction plane is also maintained at the discharge station A and at the rinsing station S.
  • the mold is swivelled such that the junction plane of the mold halves l2, 13, will assume a horizontal position.
  • the mold 27 is again swivelled such that the mold is rested upon the pouring nozzle 21 with the junction plane of its mold half being in vertical position. Furthermore, the mold halves l2, 13 are opened after entering the discharge station A and the mold halves are kept in opened position on its travel to the core setting station E. After inserting the core or the cores into the mold, this mold is closed and subsequently swivelled into the position suitable for performing the pouring operation.
  • the drive means 31 may cooperate at the individual stations with limit switches known per se.
  • the mold may also be lifted at the discharge station A for facilitating discharge of the casting by jerkyly moving the mold.
  • each mold is arranged with its front face 28 of the ingate passage to cooperate with the pouring nozzle, with equal distance from an index 26 stationarily, arranged on the cantilever arm 4 and, respectively, on the arms 10, 12.
  • station E there further exists the possibility to place a sand mold in station E, to fill this sand mold in the pouring station G and to drop down or put on floor the mold in station A.
  • the station A either represents the end of a cooling bed or the end of a shaking apparatus serving for destroying the sand mold.
  • the invention is not limited to pouring of iron or other metals and metal alloys but is also applicable for pouring synthetic resins.
  • a device for automatically casting molten material comprising a pouring station having a pouring nozzle, carrier means for at least two molds having ingates successively movable into said pouring station, common for all carrier means, at least one further station for discharging and preparing each mold for the following casting operation, said carrier means comprising two carrier members for said molds stepwisely guided between said pouring and further stations along two circular pathes of travel, each of said carrier members being rotatable around a vertical pivotal axis and comprising at least two cantilever arms relatively dephased for equal angles and radially extending from said axis for carrying the mold, the radius of the enveloping line of the circular pathes of the molds and the cantilever arms being smaller than the distance between said two axes, each carrier member being arranged for rotation in only one sense of rotation, said two carrier members being arranged for timed rotation in opposed senses of rotation, wherein the pathes of travel of the ingates of said molds intersect one another at two intersecting points,
  • each carrier member comprises two cantilever arms carrying molds and symetrically extending from said pivotal axis of the carrying member in opposed directions, said cantilever arms intermeshing like combteeth.
  • the cantilever arm comprises further arms, said molds being arranged on said further arms, said further arms being arranged for swivelling movement around a horizontal axis and mounted on said carrier member in a releaseable manner.
  • each mold comprises an ingate passage and is arranged with the front face of said ingate passage, at the same distance from said index, said front face cooperating with said pouring nozzle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
US00347829A 1972-04-07 1973-04-04 Device for automatically casting of molten material Expired - Lifetime US3842900A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT303972A AT320876B (de) 1972-04-07 1972-04-07 Vorrichtung zum automatischen Vergießen von Schmelzen

Publications (1)

Publication Number Publication Date
US3842900A true US3842900A (en) 1974-10-22

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ID=3544348

Family Applications (1)

Application Number Title Priority Date Filing Date
US00347829A Expired - Lifetime US3842900A (en) 1972-04-07 1973-04-04 Device for automatically casting of molten material

Country Status (12)

Country Link
US (1) US3842900A (enExample)
JP (1) JPS4916624A (enExample)
AT (1) AT320876B (enExample)
BE (1) BE797778A (enExample)
CA (1) CA985475A (enExample)
CH (1) CH576827A5 (enExample)
DE (1) DE2317059C3 (enExample)
FR (1) FR2179159B1 (enExample)
GB (1) GB1386754A (enExample)
IT (1) IT983665B (enExample)
NL (1) NL7304627A (enExample)
ZA (1) ZA732026B (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1797979A3 (en) * 2005-12-16 2008-12-31 Umberto Carpani Casting production apparatus and method
CN105537571A (zh) * 2015-12-25 2016-05-04 重庆唐森机械制造有限公司 一种节能锅制造用模具
CN109014156A (zh) * 2018-08-17 2018-12-18 云南昆钢重型装备制造集团有限公司 一种集装式金属液自动浇铸装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH637856A5 (de) * 1979-03-29 1983-08-31 Karrer Weber & Cie Ag Niederdruck-kokillen-giessmaschine fuer nichteisenmetalle.
FR2534503B1 (fr) * 1982-10-19 1985-09-20 Fataluminium Spa Tete de moulage de machine a couler en coquille
IT1178524B (it) * 1984-09-28 1987-09-09 Imr Srl Impianto a due stazioni, con forno singolo, per la colata automatica in conchiglia dell'ottone, con procedimento a bassa pressione

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1797979A3 (en) * 2005-12-16 2008-12-31 Umberto Carpani Casting production apparatus and method
CN105537571A (zh) * 2015-12-25 2016-05-04 重庆唐森机械制造有限公司 一种节能锅制造用模具
CN105537571B (zh) * 2015-12-25 2017-07-14 重庆唐森机械制造有限公司 一种节能锅制造用模具
CN109014156A (zh) * 2018-08-17 2018-12-18 云南昆钢重型装备制造集团有限公司 一种集装式金属液自动浇铸装置

Also Published As

Publication number Publication date
FR2179159A1 (enExample) 1973-11-16
DE2317059B2 (de) 1974-01-24
GB1386754A (en) 1975-03-12
BE797778A (fr) 1973-07-31
AT320876B (de) 1975-03-10
DE2317059C3 (de) 1974-08-22
JPS4916624A (enExample) 1974-02-14
FR2179159B1 (enExample) 1976-11-12
CA985475A (en) 1976-03-16
ZA732026B (en) 1974-02-27
IT983665B (it) 1974-11-11
CH576827A5 (enExample) 1976-06-30
NL7304627A (enExample) 1973-10-09
DE2317059A1 (de) 1973-10-18
AU5372073A (en) 1974-09-26

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