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WO2002034430A1 - Dispositif pour chauffer des moules - Google Patents

Dispositif pour chauffer des moules Download PDF

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Publication number
WO2002034430A1
WO2002034430A1 PCT/IB2001/001884 IB0101884W WO0234430A1 WO 2002034430 A1 WO2002034430 A1 WO 2002034430A1 IB 0101884 W IB0101884 W IB 0101884W WO 0234430 A1 WO0234430 A1 WO 0234430A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating
station
hot gas
gas line
valve
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.)
Ceased
Application number
PCT/IB2001/001884
Other languages
German (de)
English (en)
Inventor
Erich Rauch
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.)
Ing Rauch Fertigungstechnik Mbh
Original Assignee
Ing Rauch Fertigungstechnik Mbh
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 Ing Rauch Fertigungstechnik Mbh filed Critical Ing Rauch Fertigungstechnik Mbh
Priority to AU2001292179A priority Critical patent/AU2001292179A1/en
Publication of WO2002034430A1 publication Critical patent/WO2002034430A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00
    • 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
    • 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
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/008—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising cross-beams or gantry cranes

Definitions

  • the invention relates to a device for heating casting molds according to the preamble of claim 1 and to a heating station with the preamble features of claim 6.
  • “Casting molds” are understood here to mean a mold, such as blocks, ingots or the like, cast metal or hollow molds intended for casting, which must be preheated for certain purposes. For example, ingots are heated before they are used are melted in a melting furnace in order not to cause an excessive temperature drop in the latter or to prevent undesirable reactions.
  • Devices of this type known on the market are built in the manner of ceramic tunnel ovens, in which a belt conveyor conveys the molds to be heated into a tunnel, where the heating takes place, and then conveys them out again in a heated state to a delivery station.
  • This has several disadvantages. On the one hand, such arrangements are relatively space-consuming, especially since the tunnel must be long enough to achieve the desired heating in the throughput time. It also does not make sense to operate the system only for a short time, i.e. it will have to be provided in a foundry in a central location from where the heated pigs or other molds are to be removed. This means relatively heavy traffic with industrial vehicles, such as forklifts, which is not conducive to safety, especially in a foundry. Numerous special safety measures, such as protective grilles, light curtains etc., must be provided for the furnace itself, which must be adapted on site and cannot be planned and manufactured from the outset.
  • the invention is therefore based on the object to design a device of the type mentioned so that it
  • the heating station has a blower device for hot gas
  • the heat can be distributed more evenly, even if the molds do not - as in the tunnel furnace - move relative to it.
  • the heating station only has to work with hot gas, rather additional heaters can be provided which are operated electrically or with gas, as can also be the case for the heating of the hot gas.
  • hot gas is used here, this will generally be air, but for certain applications it may also be expedient to use other gases, such as CO 2 , or an inert gas, such as nitrogen.
  • the heating takes place essentially convectively, the temperature of the “transport medium”, ie the hot gas, and of the parts that come into contact with the ingots or casting molds never being close to the Melting point can come, which is of course a particular advantage of the training according to the invention. Because even in the event of business interruptions, the molds or ingots cannot overheat. However, this also provides increased safety - regardless of the throughput and the shape of the parts to be heated, because existing casting lugs can be very thin and then easily ignite when heated by means of radiators according to the prior art.
  • the very space-consuming and failure-prone transport device can be omitted.
  • the device according to the invention thus becomes significantly smaller.
  • a feed station is now provided, which is thermally insulated by a wall of the heating space formed as an insulating wall and is at least partially surrounded by second walls.
  • These second walls can now be designed in a slightly protective grid-like manner, these two units thus being constructed in the manner of individual modules and being connectable to one another, so that the device can also be easily adapted to different needs.
  • the heating station is also surrounded by a type of protective grille, because with such a structure, it is no longer necessary to adapt to local conditions.
  • a handling device is provided according to the invention, with which molds can be removed from the supply station via an opening of the two stations and fed to or removed from the heating station, so that this device is not exposed to the entire heating and is therefore more reliable in the Operation is.
  • a heating station used according to the invention advantageously has the features of claim 6.
  • Fig. 1 is a perspective view of a modular sequence of a feed station, a heating station and a delivery station, which from one into the
  • Fig.la illustrates an enlarged detail from the circle A of Fig. 1;
  • FIG. 2 shows a side view of the arrangement according to FIG. 1 after the protective grille has been removed and in a slightly modified form
  • Figure 3 shows the heating station in detail and on a larger scale.
  • FIG. 5 shows an arrangement composed of more than the three modules shown in FIG. 1.
  • a device 1 for heating cast into blocks and brought into a customary shape pigs 2 can be seen, the core of which on the one hand insulating walls 4a (Fig. 3) and on the other hand, preferably as a protective grid 4, first formed Has heating station 5 having walls.
  • a feed station 7 which is at least partially surrounded by a protective grid 6 as a second wall and in which the still cold pigs 2 are preferably mounted on a frame 8.
  • the protective grille 4 or 6, as can be seen, is preferably square in plan view, in order to enable easy attachment of a further module, as required.
  • Feet 9 are expediently attached to the respective lattice frame.
  • the second walls 6 In order to be able to replenish the stock of pigs 2 in the feed space again and again in good time, it is advantageous to provide the second walls 6 as a grid to enable a view and at the same time for protection.
  • a door such as a door (which can be moved to the left in FIG. 1) Sliding door 10 to be provided to allow refilling of ingots 2 into the frame 8.
  • the door 10 can be designed on each side that appears to be expedient and, if appropriate, also as a door that can be pushed up or as a pivoting door. It should be mentioned that, although it is preferred if the walls 4 and 6, for example in the manner of FIG.
  • the handling device 11 has an approximately horizontal travel rail 12 and a vertical rail 13, on which it can run up in a manner not shown, known per se by means of a schematically indicated travel drive unit 14, while the travel unit 14 also on the rail 12 engages in such a way that it can be moved like a cross slide along both guide devices 12 and 13.
  • the handling device 11 has, moreover, expediently two pliers-like gripping pliers 15 which reach under the respective ingot 2 like a shovel and are thus capable of being lifted.
  • the distance between the two gripping tongs 15 accordingly corresponds approximately to the dimension of the ingots 2.
  • the gripping tongs 15 can be actuated in a manner known per se for handling devices in such a way that they can reach under the respective ingot with their lower, shovel-like ends and then lift them when starting up , It can be seen that the walls 4 and 6 are open at the top for unimpeded access of the pliers 15. This is particularly favorable to save space, although it would be conceivable to provide lateral openings in the grid walls 4, 6 and to set up a handling device arranged outside the same.
  • the handling device 11 when gripping (and then also when parking) the pigs 2 is to be positioned fairly precisely. This can be done in various ways.
  • the exact position of the tongs 15 above the ingots 2 in the feed station 7 can be read, for example, by mechanically, optically, magnetically or inductively or capacitively provided on the rail 12 incremental or binary markings are determined.
  • a stepping motor can also be provided for moving the handling device 11, the number of steps of which is counted and which stops at a certain number of steps (which corresponds to the position above the frame 8).
  • the handling device 11 is provided with at least one position sensor, for example at 16, which at least for determining the position of the tongs 15 and / or the ingot to be gripped 2 is formed.
  • This sensor 16 can be an optical sensor, for example.
  • the pigs 2 are brought from the feed station 7 to the heating station 5.
  • This heating station 5 will be described in detail later with reference to FIG. 3.
  • the heating station has at least one heating space, but here two, which can be sealed at the top by a cover 17 as a closing device.
  • the slightly modified variant of the feed device according to Fig. 2 shows a feed station 7 with two juxtaposed frames 8. This makes it possible, for example, for an operator to fill up a frame 8 with fresh ingots while the handling device 11 ingots 2 from the takes another frame.
  • the changeover of the removal by the handling device can either be controlled by hand, or takes place automatically when the sensor 16 detects that no frame is contained in a frame 8. In this case, it is advantageous if the sensor 16 triggers a corresponding alarm of an alarm device 16 '(optically and / or acoustically) in order to draw the operator's attention to the need for refilling.
  • the frame 8 is designed to be mobile so that it is filled outside the grid walls 6 and then inserted into the feed station 7 instead of an empty frame.
  • This design is particularly useful when a feed station contains two such racks 8, one of which is "being processed” by the handling device 11, ie pigs are fed from this rack to the heating station while the other is being filled.
  • the adaptation of the handling device 11, Once removed from one frame and then from the other, either by manually switching the operator, by providing a turntable (which changes the frames), or by appropriate software in connection with the sensor 16, as mentioned above.
  • each frame 8 has laterally protruding storage surfaces 18 which, although they can be folded upwards in accordance with arrow a, but can hold a pig safely in the position protruding from the respective stand, as shown.
  • storage areas are not absolutely necessary if the casting molds to be transported by means of the handling device 11, such as the ingots 2, are shaped in such a way that the handling device 11 can grip them easily and safely. This is particularly the case with pigs with sloping faces, with which they are often formed, so that even more pigs of this type can then be placed standing one on top of the other in the feed station.
  • FIG. 2 also shows the outer structure of the heating station 5 more clearly.
  • it has two separate heating spaces 19.1, 19.2, each of which is closed at the top by means of the cover 17.
  • Each lid 17 has, appropriately graded, upstanding struts 17 ', on which the other lid, as shown in dash-dotted lines, can be placed when opening the associated heating space 19.1 or 19.2, so that no separate parking space has to be provided.
  • the heating station 5 is also provided with a clipboard 20 for heated pigs 2 removed from the respective heating space 19.1 or 19.2, so that the handling device 11, after removal of a heated pig 2, place it on the tray and then can still close or put on the respective cover 17.
  • the respective ingot 2 Only then is the respective ingot 2 removed from the clipboard 20 and advantageously fed to a delivery station 21 which, for example, via motors provided in the interior of transport rollers 22 and driving it (not visible), the respective ingot 2 to a processing station, that is to say, for example to one Die-casting cell assigned to the melting furnace.
  • a common blower 23 is expediently assigned to the heating spaces 19.1, 19.2, the operation of which is described in connection with the heating spaces using FIG. 3. It should be mentioned that the arrangement could alternatively do without a delivery station 21 if the handling device 11 supplies the respective heated ingot directly to the consumer in a production cell, that is to say to the melting furnace located there.
  • the two modules or cells 5, 7 can be joined together so that there is a substantially continuous surface from their two walls 4, 6, for example, by telescopically inserting the frame of the grid into one another are.
  • the feed station 7 and the heating station 5 can be designed as detachable cells. 1A, however, illustrates an advantageous possibility of detachable assembly on the basis of section A of FIG. 1.
  • the grille frames of the protective grille are provided with a T-slot 24 profiles 25, e.g. extruded profiles. This corresponds approximately to the design of curtain rails into which a clamping piece 26 can be pivoted in the longitudinal direction of the groove 24 and then 90 ° in the groove 24, whereupon it can be clamped by means of a screw 28 inserted on a second clamping piece.
  • any other releasable fastening - such as fastening screws that can be screwed into the screw holes of one frame on the other frame, dowels or other form-fitting connecting devices - is also possible. In any case, such a releasable fastening enables greater stability on the one hand and on the other hand the greatest possible flexibility in the assembly of the individual modules 5, 7 and 21.
  • a fan rotor 23.1 of the fan 23 is mounted in a shaft 29 below the two heating spaces 19.1, 19.2 and can be driven by means of a drive part 23.2.
  • a drive part 23.2 On the suction side opposite the drive part 23.2 there are provided hot gas lines 30, 31 which are each connected to slot-shaped suction openings 32, 33 in a manner not shown. This ensures an energy-saving recirculation mode.
  • heating devices e.g. at 105, (gas and / or electric heating) to compensate for heat losses.
  • gas and / or electric heating As a result of any leakage losses and the possibly necessary delivery of gas that is too moist (normally air, but possibly also inert gas, such as nitrogen), it will be necessary to add a certain amount of gas.
  • This can be done through a respective intake duct 34 with an adjustable supply valve (flap 35) or in another corresponding manner.
  • the shaft 29 branches to form supply lines 36, 37 for the individual heating rooms 19.1, 19.2.
  • a flap valve 38 (or another valve) is provided in each supply line 36 or 37, through which the respective heating space 19.1 or 19.2 can be cut off from the hot gas supply via the shaft 29.
  • the line 37 is assigned to the heating space 19.1 as a shunt line, via which the hot gas flow can be continued even when the valve 38 assigned to the space 19.1 is closed.
  • the line 36 forms a shunt line to the heating space 19.2, via which the hot gas flow can be conducted when the supply to the heating space is closed by its valve 38.
  • the respective shunt line 36 or 37 is now connected to a further heating space, so that optimal use of the thermal energy and heating up a second ingot 2 is possible if from the other heating space Completely heated ingot 2 is removed after opening the associated lid 17 by means of the handling device 11 (cf. FIGS. 1, 2).
  • each of the heating spaces 19.1, 19.2 according to FIG. 3 has only one receiving device for charging a casting mold or ingot 2 in the form of a parting stand 39.
  • a cover 17 could be provided above the respective frame or trestle, so that, if necessary, more than one such closure member 17 is also assigned to a heating space.
  • the respective flap valve 38 is to be closed to avoid heat losses when the associated cover 17 is opened.
  • the handling device 11 is also exposed to a lower thermal load.
  • the respective flap 38 it would be conceivable for the respective flap 38 to be switched from its open state to the approximately horizontal closed state by the control of the handling device 11, which "knows" when the handling device - according to its program or on the basis of a control commands - the cover 17 picks up.
  • a rod 40 is articulated to a handlebar 41, which in turn engages a crank 42 for rotating the associated flap 38.
  • a control circuit 44 can be provided for regulating a drive motor 23.3 for the blower 23, in which case this blower has at least two different speeds.
  • the design is advantageously made such that at least one temperature sensor 45, e.g. is provided in a hot gas duct 31, which only switches the blower 23 to a higher speed when a certain minimum temperature has been reached, which is determined via a threshold switch 46. In this way, unnecessary loads or overloads of the drive motor for the air circulation can also be avoided.
  • a stepless regulation could also be accomplished in order to avoid that too cold gas or too cold air is unnecessarily circulated and for a short time also comes into contact with the heating device provided in lines 30 and 31.
  • such a temperature sensor could influence the heater 105, but in the opposite sense, by switching to maximum thermal energy output when the temperature determined by the sensor 45 is below a setpoint level (possibly from several such setpoint levels) and is switched to minimum heat output as soon as the desired temperature has been reached.
  • Fig. 4 shows an embodiment of a heating station, which is advantageous for larger amounts of metal to be heated.
  • Three heating stations 5a, 5b of the type shown in FIG. 3 are assembled such that the blower shaft located in bearings 23.2 can be extended to the right beyond motor 23.3 by one blower rotor 23.1 (see FIG. 3). in each of the two units 5a, 5b, each having a pair of heating spaces.
  • the two hot gas circuits of the units 5a, 5b could also be combined into a single circuit.
  • a temperature sensor 45 (FIG. 3) may be assigned to one of the two units 5a, 5b, whereby the output signals of both sensors are fed to a mixer for joint fan control.
  • the mixing stage may be a simple addition stage, with the threshold switch 46 (FIG. 3) then being connected downstream of this mixing stage.
  • This feed station 7 is followed by two heating stations 5.1, 5.2, from which the handling device 11 alternately removes the heated pigs via rails 12.1, 12.2 which are inserted into one another. This is advantageously done in a regular sequence.
  • These heating stations 5.1, 5.2 can then be followed by two delivery stations 21.1, 21.2, of which station 21.1 has, for example, the roller conveyor 22.1 which is shown in FIGS. 1 and 2 and runs approximately perpendicular to the plane of the drawing, whereas the delivery station 21.2 has a (or may have in a different direction) roller table 22.2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Confectionery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif (1) pour chauffer des moules (2), qui comprend une station de chauffage (5). A ce dispositif de chauffage sont associés une installation de chauffage, qui sert au chauffage d'au moins une chambre de chauffage, ainsi qu'un dispositif de transport (11), qui sert à amener les moules (2) à la station de chauffage (5) et à évacuer les moules (2) une fois chauffés. La station de chauffage (5), qui est entourée par des premières parois (4, 4a), est pourvue d'une soufflerie (23) pour les gaz chauds et d'au moins une chambre de chauffage qui peut être fermée de façon sensiblement étanche par un dispositif de fermeture (17) et comporte un dispositif de réception pour le chargement d'au moins un moule (2). Ladite station de chauffage est en outre isolée thermiquement d'une station d'amenée (7), partiellement entourée de deux parois (6), par une paroi constituant, au moins partiellement, une paroi isolante. Le dispositif de transport est un appareil à actionnement manuel (11) à l'aide duquel les moules (2), par des ouvertures ménagées dans les deux stations (5, 7), peuvent être retirés de la station d'amenée (7) et amenés à la station de chauffage (5) ou retirés de celle-ci. Une station de chauffage (5) correspondante peut être équipée d'une soufflerie (23) à laquelle sont associées une première conduite pour gaz chauds et une seconde conduite pour gaz chauds. Grâce à une vanne, les gaz chauds sont, au choix, conduits par la première conduite pour gaz chauds ou par la seconde conduite pour gaz chauds.
PCT/IB2001/001884 2000-10-25 2001-10-10 Dispositif pour chauffer des moules Ceased WO2002034430A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001292179A AU2001292179A1 (en) 2000-10-25 2001-10-10 Device for heating casting moulds

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000152760 DE10052760A1 (de) 2000-10-25 2000-10-25 Vorrichtung zum Wärmen von Giessformen
DE10052760.4 2000-10-25

Publications (1)

Publication Number Publication Date
WO2002034430A1 true WO2002034430A1 (fr) 2002-05-02

Family

ID=7660931

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2001/001884 Ceased WO2002034430A1 (fr) 2000-10-25 2001-10-10 Dispositif pour chauffer des moules

Country Status (3)

Country Link
AU (1) AU2001292179A1 (fr)
DE (1) DE10052760A1 (fr)
WO (1) WO2002034430A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118513538A (zh) * 2024-07-25 2024-08-20 江苏汉诺威铸业有限公司 一种金属模具预热装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3111218A1 (de) * 1981-03-21 1982-12-16 Ipsen Industries International Gmbh, 4190 Kleve Ofen zur waermebehandlung von bohrern
DE3643285A1 (de) * 1986-08-18 1988-02-25 Didier Eng Chargier- und dechargiermaschine fuer einen waermofen fuer waermgut, wie brammen, bloecke od. dgl.
DE9208080U1 (de) * 1991-07-25 1992-09-03 Lingl Systemtechnik GmbH, 8908 Krumbach Vorrichtung zur Beschickung und Entnahme von Langgutkassetten

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982889A (en) * 1975-07-14 1976-09-28 Olson Benjamin F Preheating system for aluminum remelt furnace
DE3247023A1 (de) * 1982-12-18 1984-06-20 W. Strikfeldt & Koch Gmbh, 5276 Wiehl Einrichtung zur beschickung von industrieoefen, insbesondere metallschmelzoefen, mit vorwaermung des beschickungsguts durch ausnutzung der abgaswaerme
CA2178763C (fr) * 1995-06-06 1999-04-20 Brian W. Le Gras Enceinte de rechauffage de lingots et tube de transfert de metal en fusion pour installation de fusion et de coulee d'aluminium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3111218A1 (de) * 1981-03-21 1982-12-16 Ipsen Industries International Gmbh, 4190 Kleve Ofen zur waermebehandlung von bohrern
DE3643285A1 (de) * 1986-08-18 1988-02-25 Didier Eng Chargier- und dechargiermaschine fuer einen waermofen fuer waermgut, wie brammen, bloecke od. dgl.
DE9208080U1 (de) * 1991-07-25 1992-09-03 Lingl Systemtechnik GmbH, 8908 Krumbach Vorrichtung zur Beschickung und Entnahme von Langgutkassetten

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118513538A (zh) * 2024-07-25 2024-08-20 江苏汉诺威铸业有限公司 一种金属模具预热装置

Also Published As

Publication number Publication date
AU2001292179A1 (en) 2002-05-06
DE10052760A1 (de) 2002-05-08

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