US3744545A - An electric circuit for starting a casting machine having an endless mold - Google Patents

An electric circuit for starting a casting machine having an endless mold Download PDF

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Publication number
US3744545A
US3744545A US00140394A US3744545DA US3744545A US 3744545 A US3744545 A US 3744545A US 00140394 A US00140394 A US 00140394A US 3744545D A US3744545D A US 3744545DA US 3744545 A US3744545 A US 3744545A
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United States
Prior art keywords
mold
wires
starting
metal
casting
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Expired - Lifetime
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US00140394A
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English (en)
Inventor
I Gyongyos
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LAUENER ENGINEERING
Prolizenz AG
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Prolizenz AG
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Assigned to SWISS ALUMINIUM LTD. reassignment SWISS ALUMINIUM LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PROLIZENZ AG, A CORP. OF SWITZERLAND
Assigned to LAUENER ENGINEERING reassignment LAUENER ENGINEERING NUNC PRO TUNC ASSIGNMENT (SEE DOCUMENT FOR DETAILS). Assignors: SCHWEIZERISCHE ALUMINIUM, A.G.
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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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0608—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by caterpillars

Definitions

  • This invention relates generally to casting of metal strips and, more specifically, to means for starting a casting machine of the type having two opposed endless, caterpillar-type tracks of half-molds for casting non-ferrous metals, especially aluminum and aluminum alloys. At the pour-in site, the opposed half-molds are put together'and move in this united condition across a predetermined distance.
  • the half-molds from the upper and lower tracks are thus composed to form the actual operative mold which, at the discharging end, is separated into individual halfmolds again and after a short period of time the halfmolds are reunited at the site of the metal pouring.
  • the circulating half-molds are connected with guiding and driving members through supporting and fastening elements having a reduced total thermal conductivity.
  • the machine therefore, enables casting of metal strips of a considerable width, for instance 20mm thick aluminurn strips having a width of 1,500 mm and more.
  • a special metal feeding device is employed, which is also described in the patent literature, for example in the Swiss Pat. No. 461,716. It is also possible to cast downwardly at an oblique angle or even horizontally.
  • the machine can be inclined at an angle between 45, preferably between and 1 downward from a horizontal line in the direction of casting.
  • Ser. No. 108,529 filed Jan. 21, 1971 and Ser. No. 133,007 filed Apr. 12, 1971, and Ser. No. 140,480 filed May 5, 1971.
  • Such a sloping or horizontal casting position offers considerable advantages in comparison with the vertical casting.
  • the metal feeding is easier; no underpressure is necessary.
  • the metal strip is discharged in a more convenient position from the machine and there is no necessity to bend excessively the discharged strip in its hot, brittle condition. The strips can be better watched by the operator and are more accessible.
  • the correct dimensioning of the mold space between the nozzle outlet and the starter bar is dependent on the size of the machine, especially on the size of the halfmolds, as well as on the kind of the cast metal, the metal temperature and the like.
  • the distance between the nozzle outlet and the starter bar may amount to 600 mm at the beginning of casting of a 20 mm thick and 1,500 mm wide aluminum strip.
  • an object of this invention to provide means for the prompt starting of the movement of the endless mold tracks at such an instant after the beginning of the casting process as to prevent the metal melt both from penetrating the space between the nozzle and the half-molds and from discharging from the mold space in the direction of casting.
  • Another object of this invention is to provide such means which can be applied not only for a slightly inclined machine (and thus for a correspondingly inclined united mold) but also for a horizontal or a vertical or an almost vertical casting.
  • thecontact elements are located preferably between two consecutive half-molds of the lower half-mold track, since the short-circuit due to the poured-in metal and consequently the signal occur earlier than the case would be if the contacts were clamped to the upper half-mold track.
  • This time advance of the signal has the advantage that the inertia of the machine is compensated during the start.
  • the contact elements are preferably in the form of insulated wires with free contact tips. As soon as the united half-molds become separated, the contact wires are removed because they are needed at the beginning'of the casting process only.
  • the contact tips should project only slightly into the mold space.
  • the size of the wire (it can be a flat or a round one) has to be as low as possible in order to avoid disturbances in the minute tolerance between the two adjoining half-molds.
  • FIG. 1 is a schematic perspective view of a bottom endless half-mold track with the circuit of this invention
  • FIG. 2 is a schematic side elevational view of a prior art casting machine having endless mold tracks
  • FIG. 3 is a view similar to FIG. 2 with a circuit for carrying out the starting method of this invention.
  • the casting machine has a top caterpillar or endless half-mold track 10 and a bottom caterpillar or endless half-mold track 11.
  • the top half-molds 12 of the top track are periodically put together with the opposite bottom half-molds 13 of the bottom mold track 11.
  • the united half-molds l2 and 13 run for a certain distance 14, predetermined by the design of the machine, in a straight direction and form in these limits, indicated by dashed lines, the actual mold.
  • This mold in the given example, is composed of two-times seven half-molds. For the reason of simplicity, the illustration of all supporting and fastening components on the supporting frame 15 is omitted. Only in FIG. 1 there are indicated driving teeth segments 16 for bottom half-molds 13.
  • a melt feeding trough 17, a casting nozzle 19, and a stopper 18 are situated at the pour-in site of the mold whereas the starter bar 20 with a guiding rod 21 and the advancing mechanism 22 are located at the discharge end of the mold tracks.
  • two contact elements 23 such as free tips of an insulated wire, are clamped in the joint between two adjoining half-molds 13; the distance of the joint from the site of pouring has been determined by tests. It has been experimentally found, for example, that the interval of 200 mm from the outlet of the nozzle 19 is an optimum distance provided that the solidification distance is 600 mm and the clearance of the mold space is 20 mm X 1,500 mm.
  • the contact elements 23 are connected through a signal lamp 25 on a control panel 26 to a current source 24. As soon as the front line of the melted metal short-circuits the contacts 23, the signal circuit becomes closed and the signal lamp 25 lights up.
  • half-molds l2 and 13 are preheated so as to maintain a temperature of about 70 C at the moment of pouring-in of the metal melt, and, thereupon, they are sprayed by a graphite slur.
  • the melted metal in the supply trough 17 is prevented from entering the nozzle 19 by a stopper 18.
  • the melted metal is fed into the supply trough 17 until the metal level exceeds a little (50 mm, for example) the inlet of the nozzle 19. In this manner it is guaranteed that, upon pulling out the stopper 18, a sufficient amount of the metal melt for filling up in a few seconds the nozzle and the mold is for disposal; the melt is supported to flow through the nozzle in a wide front without causing any solidification deposits in the latter.
  • the current circuit is closed as mentioned above.
  • the light of the signal lamp provides a signal for starting the casting machine.
  • the casting machine is equipped with a cooling system according to the Swiss Pat. No. 456,056, a blower for producing an underpressure in the mold coolers as well as a cooling water pump (with a little delay) are set into operation simultaneously with the start of the casting machine. Since the casting machine needs a certain amount of time upon its start to get the mold tracks accelerated to the predetermined speed of their circulation, the contact elements 23 have been set relatively far away (400 mm, for instance) from the starter bar 20. The space between the contact elements 23 and the starter bar 20 is filled up by the metal belt in the course of the acceleration period of the mold tracks.
  • a mold formed of opposite groups having movable mold blocks joined in the mold path to complete the mold, and a metal feeding nozzle communicating with the entrance of the mold,
  • said wires having conductive tips projecting into the mold for being shunted by the leading portion of the poured-in stream of metal;
  • signalling means responsive to the shunting of the two wires operable for indicating the instant for starting the casting machine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US00140394A 1970-05-08 1971-05-05 An electric circuit for starting a casting machine having an endless mold Expired - Lifetime US3744545A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH684470A CH500032A (de) 1970-05-08 1970-05-08 Verfahren zum Ingangsetzen einer Giessmaschine mit Raupenkokille

Publications (1)

Publication Number Publication Date
US3744545A true US3744545A (en) 1973-07-10

Family

ID=4315899

Family Applications (1)

Application Number Title Priority Date Filing Date
US00140394A Expired - Lifetime US3744545A (en) 1970-05-08 1971-05-05 An electric circuit for starting a casting machine having an endless mold

Country Status (15)

Country Link
US (1) US3744545A (nl)
JP (1) JPS513693B1 (nl)
AT (1) AT308991B (nl)
BE (1) BE766067A (nl)
CA (1) CA938423A (nl)
CH (1) CH500032A (nl)
DE (1) DE2122049C3 (nl)
ES (1) ES389780A1 (nl)
FR (1) FR2088441B1 (nl)
GB (1) GB1288172A (nl)
NL (1) NL156331B (nl)
NO (1) NO135566C (nl)
SE (1) SE369854B (nl)
YU (1) YU111271A (nl)
ZA (1) ZA712987B (nl)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4976790A (en) * 1989-02-24 1990-12-11 Golden Aluminum Company Process for preparing low earing aluminum alloy strip
US5104465A (en) * 1989-02-24 1992-04-14 Golden Aluminum Company Aluminum alloy sheet stock
US5106429A (en) * 1989-02-24 1992-04-21 Golden Aluminum Company Process of fabrication of aluminum sheet
US5110545A (en) * 1989-02-24 1992-05-05 Golden Aluminum Company Aluminum alloy composition

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH618366A5 (nl) * 1977-05-05 1980-07-31 Prolizenz Ag
JPS5821564U (ja) * 1981-08-04 1983-02-09 サントリー株式会社 密封容器
JPS6070550U (ja) * 1983-10-21 1985-05-18 東洋アルミニユウム株式会社 包装用容器
JPS6075256U (ja) * 1983-10-24 1985-05-27 大日本印刷株式会社 花の種つき複合カツプ容器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4976790A (en) * 1989-02-24 1990-12-11 Golden Aluminum Company Process for preparing low earing aluminum alloy strip
US5104465A (en) * 1989-02-24 1992-04-14 Golden Aluminum Company Aluminum alloy sheet stock
US5106429A (en) * 1989-02-24 1992-04-21 Golden Aluminum Company Process of fabrication of aluminum sheet
US5110545A (en) * 1989-02-24 1992-05-05 Golden Aluminum Company Aluminum alloy composition

Also Published As

Publication number Publication date
DE2122049C3 (de) 1975-08-14
ZA712987B (en) 1972-01-26
AT308991B (de) 1973-07-25
DE2122049B2 (de) 1975-01-02
ES389780A1 (es) 1974-03-01
NL156331B (nl) 1978-04-17
CH500032A (de) 1970-12-15
DE2122049A1 (de) 1971-11-18
BE766067A (fr) 1971-09-16
CA938423A (en) 1973-12-18
FR2088441B1 (nl) 1976-02-06
YU111271A (en) 1982-06-30
NL7104686A (nl) 1971-11-10
JPS513693B1 (nl) 1976-02-05
FR2088441A1 (nl) 1972-01-07
NO135566C (nl) 1977-04-27
SE369854B (nl) 1974-09-23
NO135566B (nl) 1977-01-17
GB1288172A (nl) 1972-09-06

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AS Assignment

Owner name: SWISS ALUMINIUM LTD., CH-3965 CHIPPIS, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PROLIZENZ AG, A CORP. OF SWITZERLAND;REEL/FRAME:004137/0878

Effective date: 19810921

AS Assignment

Owner name: LAUENER ENGINEERING, SWITZERLAND

Free format text: NUNC PRO TUNC ASSIGNMENT;ASSIGNOR:SCHWEIZERISCHE ALUMINIUM, A.G.;REEL/FRAME:005092/0634

Effective date: 19890124

STCF Information on status: patent grant

Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)