EP0084090A1 - Installation à charger des lingots pour une machine à couler sous pression à chambre chaude - Google Patents

Installation à charger des lingots pour une machine à couler sous pression à chambre chaude Download PDF

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Publication number
EP0084090A1
EP0084090A1 EP82110237A EP82110237A EP0084090A1 EP 0084090 A1 EP0084090 A1 EP 0084090A1 EP 82110237 A EP82110237 A EP 82110237A EP 82110237 A EP82110237 A EP 82110237A EP 0084090 A1 EP0084090 A1 EP 0084090A1
Authority
EP
European Patent Office
Prior art keywords
relay
contact
valve
ingot
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82110237A
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German (de)
English (en)
Other versions
EP0084090B1 (fr
Inventor
Ernst Bühner
Ottmar Zink
Günter Hahn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Preh GmbH
Original Assignee
Preh GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Preh GmbH filed Critical Preh GmbH
Priority to AT82110237T priority Critical patent/ATE18642T1/de
Publication of EP0084090A1 publication Critical patent/EP0084090A1/fr
Application granted granted Critical
Publication of EP0084090B1 publication Critical patent/EP0084090B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0028—Devices for monitoring the level of the melt
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S266/00—Metallurgical apparatus
    • Y10S266/90—Metal melting furnaces, e.g. cupola type

Definitions

  • the invention is based on a mass loading device for a hot chamber die casting machine according to the preamble of claim 1.
  • zamak alloys zinc with the alloy additives aluminum, copper and magnesium
  • zamak alloys zinc with the alloy additives aluminum, copper and magnesium
  • Zamak parts are usually copper-plated, nickel-plated, chrome-plated, cadmium-plated or tin-plated.
  • the mold temperature is of particular importance. In addition to the mold temperature, the melting temperature should also be continuously monitored.
  • Fluctuating temperatures of the melt and mold result in an uneven quality of the castings.
  • There are also a number of other machine-related and casting system-related casting parameters that have an influence on the quality of the parts e.g. speed of the melt in the gate, different cooling conditions after the parts have been removed from the mold, mold filling conditions, etc.
  • the influence of the bath level also belongs to the machine-related casting parameters. Extensive investigations have shown that the bath level height has an influence on the position of the melt in relation to the gate with a fixed setting of the switchover point. In the first setting, the melt was immediately in front of the mold filling phase the gate.
  • the speed of the casting plunger from the beginning to the end of the mold filling remained constant, and this also applied to the pressure under which the melt in the casting system was under the mold filling.
  • the bath level had dropped, ie the switchover point from the first to the second phase is such that the melt is well in front of the gate.
  • the speed of the pouring plunger dropped when the melt reached the gate.
  • a high pressure peak occurred with the drop in speed.
  • the bathroom mirror had been raised in a third shot.
  • part of the mold cavity is filled in the first casting phase. This time the speed of the casting piston increased steadily when the second phase was triggered. Only in the second half of the mold filling phase did the speed of the casting piston reach a constant value.
  • the fluctuations in the bath level height can be reduced to + 0.5 cm by the control device provided according to the invention. This ensures greater machine protection. This in turn results in more constant production and better utilization of the machine. There is also a significant improvement in the quality of the parts produced.
  • a further economic advantage is achieved with the proposed control device in that several machines can be supervised by one worker, which was previously not possible by constant observation of the bath level.
  • the working conditions for the workers in the sense of a more humane environment are improved in that he does not so often have to be in the vicinity of the storage tank with the molten metal and be exposed to the heat prevailing there, since the machines can run alone for a longer period of time .
  • FIGS. 1 and 2 show the structural design of the ingot feeding device.
  • FIGS. 3 and 7 show the circuit diagrams for the associated electropneumatic control device.
  • the exemplary embodiment of an automatic ingot loading device described here uses pneumatic drive means.
  • electromagnetic, electrical or hydraulic drive means are used.
  • the ingot feeding device shown in FIGS. 1 and 2 essentially consists of a refill station, designated 1, with a control device accommodated in or on it.
  • the refill station itself has a lower station part 2 and an upper station part 3.
  • the lower station part 2 contains the electrical circuit and the valves for the pneumatic control of the cylinders.
  • the refill station can be moved by rollers so that it can easily be moved from one machine to another if required. From the die casting machine, the reservoir 19 is also only partially indicated.
  • the actual die casting machine has no meaning for the invention, so that an illustration has been omitted.
  • the upper station part 3 is composed of a rotating part 5 and a supporting part 4 which is fastened to the lower station part 2 and which has a holding plate 25 arranged in an inclined position.
  • the rotating part 5 is rotatably attached to this holding plate 25.
  • the rotating part 5 itself consists of a central part and a plurality of magazines 7 arranged in the shape of a revolver.
  • the pigs 6 are inserted into these magazines and held in an oblique position due to gravity.
  • 10 magazines are provided. However, any number deviating from this is also conceivable.
  • the angle of the inclined position of the magazines is between 20 and 30 degrees, preferably 25 degrees.
  • an obliquely arranged slide 21 is provided in the storage container with an end bend as a stop.
  • a circular arrangement of the magazines has been given preference over a linear arrangement in order to keep the effort for the drive when rotating the rotating part as small as possible. If one had chosen a linear arrangement, then e.g. the pigs are lifted from bottom to top or you could drop them from top to bottom if you had previously placed the pigs at a much greater height with a higher energy expenditure. At most, a horizontal arrangement would still be conceivable.
  • the circular arrangement has the advantage that - at least with fully loaded magazines - part of the ingots contributes to the torque due to their weight.
  • the rotating part is turned into a stop angular position with the aid of a switching cylinder 10 and the stop with the aid of a locking cylinder 11. The exact function will be explained later.
  • a supply channel 8 which has the same inclined position as the magazines and which is attached to the support part at one end. At this end, an opening 9 is recessed in the support part, so that the ingot can slide from the magazine through the opening 9 into the storage channel.
  • the magazines themselves are open at both ends.
  • the pig 6 could not immediately dip into the molten metal 20 from the supply channel 8 at a relatively high speed and possibly splash, the pig is held in the supply channel 8 and the front opening is only opened when necessary.
  • this opening can be closed by release means.
  • the piston rod 13 of the locking cylinder has at the end a respective side lug 14 which projects into a guide slot 15 of a pivot lever 16 which can be pivoted about a pivot point.
  • a release lever 18 which can also be deflected about a pivot point, is pivoted.
  • This release lever 18 has a first bend 17, which cooperates with the pivot lever 16, approximately in the center.
  • the opening in the storage channel 8 is closed with a second end bend 26.
  • the scanning of the liquid metal mirror takes place with the aid of a switching device which consists of a float 22, a linkage 23 which can be pivoted about a pivot point and a float switch 24.
  • FIGS. 3 to 5 The electrical part of the control device for controlling the pneumatic cylinders is shown in FIGS. 3 to 5.
  • a DC voltage of + 24 V is required as the supply voltage, which is obtained from the mains voltage.
  • the primary winding of a transformer 27 is connected to the mains voltage via a mains switch 28 and a first fuse 29.
  • a rectifier 31, which outputs the desired DC voltage of + 24 V, is located in the secondary circuit via a second fuse 30. If the power switch is closed, a first indicator lamp 32 lights up.
  • a manual start pre-selection switch 33 or a pre-selection switch 34 for automatic operation are available for this. So that a refill can take place, the float switch 24 must be closed for this purpose.
  • a relay D1 and with a time delay of about 2 seconds a relay D2 is connected to DC voltage. To prevent harmful induction voltages that arise when the relays are switched off, all windings of the relay diodes are connected in parallel.
  • Another relay D3 is controlled with two contacts d1 and d2 in series, one contact acting as an opener and one contact as a closer. Parallel to the series contacts d1 and d2, the contacts d3 and d6 are also in series.
  • Contact d6 is a changeover contact, while contact d3 is a make contact. If relay D1 picks up, contact d1 closes and relay D3 receives voltage. After a delay of approx. 2 seconds, relay D2 also picks up and contact d2 opens. This would cause relay D3 to drop out if it did not hold itself over the parallel circuit, since contact d3 is closed in the meantime.
  • This safety circuit has therefore been provided in order to prevent the molten metal from being refilled with ingots if the float switch is accidentally caught in the switched-on position. An automatic refill takes place only when the float switch 24 has been de-energized between the individual cycles.
  • An inductive proximity switch 35 which is connected to the DC voltage, monitors the penultimate magazine to determine whether a pig is present or not. If the penultimate magazine is empty, a mass monitoring relay D12 receives voltage. A display relay D13 is connected to voltage via two closed contacts d10 and d12, that is to say that the display relay D13 is constantly live. If relay D12 now picks up, contact d12 opens and display relay D13 drops out. This closes contact d13, which is parallel to contacts d10 and d12. In addition, another contact d13 closes, with which an indicator lamp 36 is energized. This indicates that there are no more ingots in the magazines and that refilling is necessary. This display is retained until the voltage on the display relay D13 is removed with a delete key 37.
  • a lamp 38 is connected to the supply voltage with a contact d1 of the relay D1, which indicates that the float switch is in the switched-on position.
  • the supply voltage is applied to a relay D4 via this contact d1, the manual start preselection switch 33 and a contact pair of the preselection switch 34 for automatic operation.
  • the relay can also be connected to the supply voltage via the series connection of contacts D4 and D7. From the connection between the contacts d4 and d7 there is also a connection via a contact d5 to the relay D5, which can also be connected to the supply voltage via a further pair of contacts of the selector switch 34 and the series connection of the contacts d1 and d3.
  • Relay D6 is connected to the positive pole of the supply voltage via contacts d11 and d9. There is also a parallel branch via contact d7 and changeover contact d6 to the positive pole.
  • FIG. 5 shows, three solenoid valves S1, S2 and S3 are also provided, each being connected to the supply voltage via a plurality of contacts and a fuse 39, 40 and 41 each.
  • Contacts d4 and d5 are connected in parallel to the positive pole of the supply voltage. Proceeding from this, a parallel connection of the contacts d10 and d6 leads via the third fuse 39 to the solenoid valve S1.
  • the solenoid valve S2 is connected to the supply voltage via the fourth fuse 40 and the series connection of the contacts d6, d9, d7 and the parallel connection of the contacts d4 and d5.
  • a further connection is made from the connection between d7 and d9 via the contact d8 and the fifth fuse 41 to the solenoid valve S3.
  • This multiple arrangement of the contacts represents a security measure, so that a movement process is only triggered when the previous one has been started or even completed.
  • Figure 6 shows the pneumatic part of the control device.
  • the forward and return flow of the individual cylinders is influenced by three control lines SL1, SL2 and SL3.
  • the locking cylinder 12 is connected to the first and third control lines SL1 and SL3, the locking cylinder to the first and second control lines SL1 and SL2 and the switching cylinder 10 to the second and third control lines SL2 and SL3.
  • the forward and return flow of the locking cylinder 12 is influenced directly by a main directional valve 42 which can be pneumatically actuated on both sides and which is a 4/2 three-way valve. While one side of this main directional control valve 42 is connected directly to the first control line SL1, on the other side lies in the other connecting line to the third control line SL3 a pilot valve 43 which is a two-way valve which can be actuated against the force of a return spring. It is actuated by the piston rod of the shift cylinder 10.
  • the forward and return of the locking cylinder is influenced by a main directional valve 44 which can be pneumatically actuated on both sides, this being a 4/2 three-way valve.
  • a main directional valve 44 which can be pneumatically actuated on both sides, this being a 4/2 three-way valve.
  • an electrically actuable pilot valve 45 which is provided with a return spring and which is a two-way valve.
  • a switch 59 is closed which actuates this pilot valve.
  • a pilot valve 46 In the connecting line to the second control line SL2 there is a pilot valve 46 which has a return spring which is actuated mechanically by the piston rod of the switching cylinder 10 and which is a two-way valve.
  • the forward and return of the switching cylinder 10 is influenced by a main valve 47 which can be pneumatically actuated on both sides, which is a three-way valve and which is connected directly to the second and third control lines SL2 and SL3.
  • the float switch 24 is shown again for better understanding. It actuates two two-way valves 53 and 54 connected in parallel. Before that, however, both switches 57 and 58, one of which is a push-button switch and the other a locking switch, must be closed. These two two-way valves are connected on the input side to the third control line SL3. The outputs are led to a shuttle valve 55, a delay valve still being located in the connection between the two-way valve 54 and the shuttle valve 55. The shuttle valve in turn affects the position of a directional valve 51, which is a two-way valve.
  • HL is the pneumatic main line, which supplies the control lines SL1, SL2 and SL3 with compressed air, as well as the three cylinders 10, 11 and 12.
  • a mechanically actuated air main switch in the form of a two-way valve 52, the compressed air can be switched to the directional valve 51 will.
  • Control lines SL1, SL2 and SL3 are supplied with the compressed air one after the other, for this purpose a type of 1-out-3 circuit is provided consists of a first and a second 4/2 negative valve 50 and 51 connected in series, the first directional valve 50 switching to control lines SL1 and SL2 and the second directional valve 51 switching to control line SL3.
  • the position of the first directional valve 50 is determined by a pilot valve 48 which, when the piston rod of the locking cylinder 11 is in the return line, passes compressed air through the control line SL1.
  • the position of the second directional valve 51 is determined by the pilot valve 49, which is connected to the second control line SL2.
  • a cycle is to be described below with reference to FIG. 6 in conjunction with FIG. 7: It is assumed that the bath level has dropped and the float switch 24 is switched on. The pushbutton switch 58 or the locking switch 57 must also be switched through. In addition, the pneumatic main line must have been switched through by means of the valve 52 by hand.
  • the control line SL3 therefore carries compressed air.
  • the two valves 53 and 54 or one of the two valves is actuated so that the compressed air reaches valve 51 and actuates this valve.
  • the main line is thus switched directly to the control line SL1.
  • the compressed air pulse on the control line SL1 actuates the valve 42 so that the piston rod of the locking cylinder returns. This means that the storage channel is closed.
  • a switch 59 is switched through in the return through the piston rod, which in turn acts on the valve 45.
  • the control line SL1 is thus switched through to the main directional valve 44 and this valve is actuated.
  • the piston rod of the locking cylinder 11 moves from the "CLOSED" position in the forward to the "OPEN” position in the return. If the lock is open, the piston rod acts in this return position on the pilot valve 48 and actuates it. This in turn actuates the valve 50 so that the main line is now switched to the second control line SL2.
  • the compressed air pulse arrives at the main directional valve 47 and actuates it. This moves the shift rod of the shift cylinder from the return to the forward.
  • the valve 46 is first actuated in the middle position of the shift rod.
  • the valve 51 In the end position of the switching rod, the valve 51 is actuated so that the main line is switched to the third control line. At the same time, the piston rod of the locking cylinder 11 returns to the "CLOSED" position. Through the movement the piston rod of the shift cylinder, the turned part is turned one magazine. The compressed air pulse in the control line SL3 actuates the valve 47 and the piston rod of the shift cylinder 10 returns. In addition, the piston rod of the locking cylinder 12 moves back into the feed line, so that the end of the supply channel is released and the ingot can slide into the melt.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP82110237A 1981-12-07 1982-11-06 Installation à charger des lingots pour une machine à couler sous pression à chambre chaude Expired EP0084090B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82110237T ATE18642T1 (de) 1981-12-07 1982-11-06 Masselbeschickungseinrichtung fuer eine warmkammerdruckgiessmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3148344 1981-12-07
DE19813148344 DE3148344A1 (de) 1981-12-07 1981-12-07 Masselbeschickungseinrichtung fuer eine warmkammerdruckgiessmaschine

Publications (2)

Publication Number Publication Date
EP0084090A1 true EP0084090A1 (fr) 1983-07-27
EP0084090B1 EP0084090B1 (fr) 1986-03-19

Family

ID=6148071

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82110237A Expired EP0084090B1 (fr) 1981-12-07 1982-11-06 Installation à charger des lingots pour une machine à couler sous pression à chambre chaude

Country Status (4)

Country Link
US (1) US4456229A (fr)
EP (1) EP0084090B1 (fr)
AT (1) ATE18642T1 (fr)
DE (1) DE3148344A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2539861A1 (fr) * 1983-01-20 1984-07-27 Ferco Int Usine Ferrures Dispositif d'alimentation automatique du creuset d'une machine a couler sous pression en chambre chaude
EP0572290A1 (fr) * 1992-05-27 1993-12-01 Sollac Procédé et dispositif d'alimentation en lingots de zinc d'un pot de zinc d'une ligne de galvanisation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540161A (en) * 1984-04-09 1985-09-10 Dynamold International Installation for the fusion of metal ingots
EP0790475B1 (fr) * 1996-05-03 2002-08-28 Lumpress S.R.L. Procédé et installation pour alimenter des lingots de métal dans un four de fusion
CN102607278A (zh) * 2012-03-05 2012-07-25 肇庆理士电源技术有限公司 一种供铅系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE553741C (de) * 1930-08-29 1932-06-30 Elektronmetall G M B H Verfahren und Vorrichtung zur stetigen automatischen Beschickung von Schmelzanlagen
DE2452961A1 (de) * 1974-11-08 1976-09-30 Goemac Ges Fuer Industrieoefen Beschickungseinrichtung fuer oefen
US4067463A (en) * 1975-01-13 1978-01-10 Asea Aktiebolag Apparatus for charging metal plates edgewise into a metal melt

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1032306A (en) * 1912-04-01 1912-07-09 Edward Everett Spencer Pot-charger for linotype-machines.
US1138743A (en) * 1912-06-29 1915-05-11 Albert A Froehlich Device for maintaining a constant supply of melted material in a reservoir.
US2224081A (en) * 1939-04-28 1940-12-03 United American Metals Corp Melting pot
US2245275A (en) * 1941-03-13 1941-06-10 United American Metals Corp Metal feeding apparatus
US2709529A (en) * 1951-07-13 1955-05-31 American Smelting Refining Charging slabs into melting furnace
EP0032442B1 (fr) * 1980-01-10 1984-03-21 Olin Corporation Dispositif et procédé de coulée électromagnétique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE553741C (de) * 1930-08-29 1932-06-30 Elektronmetall G M B H Verfahren und Vorrichtung zur stetigen automatischen Beschickung von Schmelzanlagen
DE2452961A1 (de) * 1974-11-08 1976-09-30 Goemac Ges Fuer Industrieoefen Beschickungseinrichtung fuer oefen
US4067463A (en) * 1975-01-13 1978-01-10 Asea Aktiebolag Apparatus for charging metal plates edgewise into a metal melt

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2539861A1 (fr) * 1983-01-20 1984-07-27 Ferco Int Usine Ferrures Dispositif d'alimentation automatique du creuset d'une machine a couler sous pression en chambre chaude
EP0572290A1 (fr) * 1992-05-27 1993-12-01 Sollac Procédé et dispositif d'alimentation en lingots de zinc d'un pot de zinc d'une ligne de galvanisation
FR2691719A1 (fr) * 1992-05-27 1993-12-03 Lorraine Laminage Procédé et dispositif d'alimentation en lingots de zinc d'un pot de zinc d'une ligne de galvanisation.

Also Published As

Publication number Publication date
DE3148344C2 (fr) 1989-05-24
EP0084090B1 (fr) 1986-03-19
ATE18642T1 (de) 1986-04-15
DE3148344A1 (de) 1983-06-09
US4456229A (en) 1984-06-26

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