• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method for producing a surface-solid metal composition, a so-called slurry, comprises the steps of adding a first predetermined amount of a solid phase metal to a vessel, a second, predetermined amount of a solid phase metal being added to the vessel, and a stirring is performed. The first and second amounts are selected so that a substantial amount of solid particles are formed in the surface metal, and the solid metal is melted to form a slurry. In the instantaneous process, the metal is poured into a separate mold and cast into a piece containing the second, determined amount of the metal. The piece is in turn used to make additional slurry. A device for casting with a metal slurry comprises a casting machine, in which a slurry is cast into a part, a furnace for melting metal and a vessel, in which molten metal can be filled. The device also comprises a unit for casting pieces of metal in solid phase, with several stations, for stepwise casting, processing and use of the pieces of metal for slurry production. Fig. 2
    公开号:SE1350010A1
    申请号:SE1350010
    申请日:2013-01-04
    公开日:2014-07-05
    发明作者:Per Jansson
    申请人:Comptech Ab；
    IPC主号:
    专利说明:

    Fixedly bonded to the solid phase metal which is added to the metal in the surface phase to produce the slurry.
    The technology described works well per se, but appears to be mainly used in laboratory environments or small-scale production. It is stated that the slurry produced according to the patent could be used in different types of casting operations, but does not state how this is to be done in practice, and the practical problems associated with such operations remain unresolved in SE528376. An example of such a problem is the attachment of the piece of metal in solid phase to the pipe stirrer. It is stated that the piece is connected to the pipe mixer by means of welding or the like, which is probably time-consuming and not suitable for series production on a larger scale.
    TROUBLESHOOTING It is thus desired to adapt the existing technology for casting with a metal slurry, so that it works for series production.
    TROUBLESHOOTING The object underlying the invention is achieved if the initially suggested method for slurry production is characterized in that metal in the fas surface phase is poured into a separate mold and cast into a piece containing the second, determined amount of the metal, which in turn is used for the production of slurry. additional slurry.
    Regarding the casting method, the goal is achieved if the slurry production takes place according to OVan.
    With regard to the device, the object is achieved if it is characterized in that it also comprises a unit, for casting pieces of metal in solid phase, with several stations, for stepwise casting, processing and use of the pieces of metal for slurry production.
    COMPILATION OF DRAWING FIGURES 10 15 20 25 30 The invention will now be described with reference to the accompanying drawings. In these: Fig. 1 shows a schematic sketch, seen from above, of a device according to the invention; and Fig. 2 is a fate diagram showing the most important steps in the method of slurry production and casting with the slurry produced.
    PREFERRED EMBODIMENT Figure 1 roughly shows a device 6, which is designed for a series production of cast components starting from a metal slurry.
    In addition to a casting machine 1, which casts the finished component, the device comprises a metal melting furnace 2A, a rotatable unit 3 for producing a solid piece of metal, a robot 4 with a vessel or a scoop, in which the metal slurry is produced and then dosed to the casting machine 1, and a heater for preheating the vessel in which the metal slurry is produced.
    The casting machine 1 can be of many different types and makes available on the market, but in the preferred embodiment it is a machine 1 which is particularly suitable for casting parts or components of a metal slurry. In general, such a machine 1 is a die casting machine which is provided with means for forcing the metal slurry into the mold and maintaining this pressure while the metal solidifies completely to a finished component.
    The choice of casting machine 1 depends in part on the type and size of components which it is desired to manufacture, and can be left to those skilled in the art.
    For the production of a slurry, as mentioned in the introduction, a metal melted to the surface phase is required, and this takes place in the furnace 2A. The oven 2A is advantageously covered and well insulated, so that the heat remains in the oven 2A to the greatest possible extent, which reduces the energy losses to the surroundings and thus the energy consumption. The furnace 2A is further provided with a thermostat, so that the molten metal can be kept at a constant temperature, which is selected to achieve a good result in the slurry production. The metering of metal from the furnace 2A to the vessel in which the slurry is produced takes place in the preferred embodiment by means of a metering chute 2B, under which the vessel is placed by means of the robot 4. The kiln 2A has a metering unit which dispenses out a predetermined amount of metal in the fas-surface phase in the groove 2B, from which the metal flows down into the vessel. The gutter 2B is rotatable or otherwise movable, so that dosing can also be done to a unit 3 described below.
    In order for the temperature of the surface metal to be predictable and not to drop in an uncontrolled manner after the metal has been metered into the vessel, there is a preheating unit 5, which preheats the vessel to a certain temperature, so that the temperature of the molten metal becomes predictable. the conditions for the slurry production to be possible to perform with a good result.
    For the production of the slurry there is a unit 3 with fl your stations 3A-3F. At station 3F there is a coil stirrer with a cast piece of solid phase metal. The piece of metal is submersible in the melt with a simultaneous stirring. In the preferred embodiment, means are also provided for controlling and monitoring the temperature of the piece of metal, so that a slurry with optimum properties can be produced. Station 3F also has means, such as scraper means, for cleaning any metal residues from the tube stirrer when the slurry is made.
    The robot 4 is movable so that it reaches the casting machine 1, the preheating unit 5, the dosing channel 2B of the oven 2A, the stirring station 3F. Station 3A is a station with an openable mold for casting a new piece of metal on a stirrer. The mold at station 3A also receives one of a series of furnace tubes on unit 3. Thus, a piece of metal is pourable onto a furnace stirrer when molten metal is poured into the mold at station 3A, from the furnace 2A via the chute 2B, which is directed towards the mold.
    The number of coil tubes in the series corresponds to the number of stations 3A-3F in the unit 3, in the preferred embodiment six. The tube tubes on the unit 3 are stepwise rotatable from one station 3A-3F to the next in a cycle between the different stations 3A-3F. This also means that a number of metal pieces have time to be cast on the corresponding number of pipe stirrers, before the first cast piece is used for a slurry production.
    Station 3B is a control station for checking that sufficient molten metal has been poured into the mold. One or more of the risers occupy a certain excess of the molten metal, and if it shrinks during cooling, some of the excess may sink into the mold before the metal has cooled completely. Control means are provided at station 3B, to check that the level in the risers is not below a certain level. This ensures that the piece of metal produced in the mold does not fall below a certain size.
    Stations 3C and 3D both have means for cooling the cast piece of solid phase metal. Cooling takes place until a predetermined temperature on the metal piece has been reached, suitable for the metal piece to be used in the near future for the production of a new slurry.
    Station 3E has means for mechanical processing of the cast piece of solid phase metal. In the preferred embodiment, this means is for removing the "paths", consisting of the material which has solidified in the riser pipe of the mold during casting. The length of the paths can vary slightly depending on e.g. on uncertainty in the dosing of the metal in the mold. The ladders are removed by punching, breaking or otherwise cutting so that the amount of metal in the solid phase piece is predetermined, and a slurry of the desired quality should result when the piece of metal on the stirrer is immersed in the molten metal at the next station 3F.
    Figure 2 shows the process for the production of the slurry step by step in a fl fate diagram. Since the unit 3 has six stations 3A-3F, in the preferred embodiment, all parts of the process will be performed synchronously each time the tube tubes on the unit 3 are rotated one step forward to a new station. For the sake of clarity, the process is therefore considered on the basis of a single piece of metal in solid phase, which is used for the production of a slurry.
    After molten metal has been dosed in a slurry making vessel, molten metal is also dosed into a mold, to make a new piece of solid phase metal, and this piece is followed until a new slurry is made. Since the process is intended to continue continuously for longer periods, the starting point is selected so that the bucket or vessel in which the molten metal is dosed is preheated in a first step 7. This is done in the preferred embodiment with a gas flame, but other heating devices, which are fast enough to be useful in the manufacturing process without slowing it down, can also be used.
    When the bucket has warmed up sufficiently, which can be determined with a temperature sensor, a predetermined amount of the molten metal from the furnace 2A is dosed in the next step 8 of the process.
    The metal, which maintains a known temperature, flows via the metering chute 2B into the bucket or vessel, which is then transferred to the station 3F for stirring.
    The piece of solid phase metal, which is arranged on the stirrer at the stirring station 3F, will be enclosed by the metal in the liquid phase, and stirring is started in step 9. Since both the amounts and the temperatures of the metal in the two phases are predetermined to give a metal slurry with good properties after a certain period of furnace escape, the properties of the slurry will not have to be tested in themselves, but follow from the carefully determined and controlled conditions (furnace stirring time, quantities and temperatures).
    In the next step 10, a small amount of molten metal from the furnace 2A, via the rotatable groove 2B, is filled into an openable mold having the shape and size of such a piece of metal used to make the slurry. A furnace stirrer is inserted into the mold, so that the piece of metal is cast on it. The mold also has at least one riser that is at least partially filled, to ensure that the part of the interior space corresponding to the finished piece of metal is completely filled with molten metal, while a certain excess is taken up in the riser.
    When the iron removal in the vessel with the slurry has been going on for so long that the solid phase metal can be assumed to be taken up in the slurry, the vessel is taken to the casting machine 1 for filling in the process step 11 in the mold which is to produce the desired part. Approximately at the same time, a cleaning is also performed in step 12 of the stirrer used in the slurry just produced. 10 15 20 25 Any metal residues are scraped away from the pipe stirrer, and the result is that the pipe stirrer is ready to be inserted into the mold at the next casting of a piece of metal.
    After a certain solidification time, the mold is opened in step 13, and the piece of metal cast on a stirrer is passed on to station 3B to check that the ladders formed in the risers are so long that it can be assumed that the mold has been filled to a sufficient level and the amount of solid phase metal in the piece of metal is large enough.
    Then a cooling of the metal piece is started in step 14. The cooling is preferably done by spraying air or another gas or liquid against the metal piece, but it is also conceivable for the metal piece to be dipped in a bath, provided that impurities which may affect the later slurry production do not added. In the preferred embodiment, the cooling takes place at both stations 3C and 3D, since a significant temperature reduction is required in order to obtain the desired properties in the slurry to be manufactured by means of this piece of metal. The temperature of the piece of metal is registered so that cooling can be stopped when the desired temperature is reached.
    In the last step 15, possibly in connection with further cooling, the ladders are removed from the piece of metal in the station SE. Other mechanical processing can also be performed in this step or further steps in the process. The piece of metal now comprises a carefully determined amount of solid phase metal of known temperature, and is thus useful for producing additional slurry by repeating process steps 7-15.
    The invention may be further modified within the scope of the appended claims.
    权利要求:
    Claims (13)
    [1]
    A method for producing a surface-solid metal composition, a so-called slurry, comprising the steps of - adding a first determined amount of a metal in the i liquid phase to a vessel, - a second, determined amount of a metal in the solid phase being added to the vessel, - a stirring being carried out, the first and the second the amount is selected so that a substantial amount of solid particles is formed in the fl surface metal, and the solid metal is melted so as to form a slurry, characterized in that a metal in the fl surface phase is poured into a separate mold and cast into a piece containing the second, determined the amount of metal, which in turn is used to make additional slurry.
    [2]
    Method according to claim 1, characterized in that said steps are repeated, so that a plurality of pieces are cast, before the first cast piece is used for the slurry production.
    [3]
    Method according to claim 1 or 2, characterized in that the cast piece is cooled before it is used for the slurry production.
    [4]
    Method according to one of Claims 1 to 3, characterized in that the respective cast piece undergoes a mechanical processing, such as deburring or interruption of so-called stigare.
    [5]
    Method according to one of Claims 1 to 4, characterized in that a stirrer is inserted into the separate mold in connection with the casting of the piece of metal in solid phase, so that the stirrer is firmly connected to the piece of metal.
    [6]
    Method according to claim 5, characterized in that the furnace stirrer is cleaned of any remaining metal residues before it is re-inserted into the separate mold for casting a piece of metal in solid phase. 10 15 20 25
    [7]
    Method according to one of Claims 1 to 6, characterized in that the vessel is preheated before the metal is supplied in the fl surface phase.
    [8]
    A method of casting comprising a slurry preparation according to any one of claims 1 to 7.
    [9]
    Apparatus for casting with a metal slurry according to claim 8, comprising a casting machine, wherein the slurry is cast into a part, a furnace for melting metal and a vessel, wherein molten metal is refillable characterized in that the apparatus also comprises a unit, for casting of metal pieces in solid phase, with fl your stations, for stepwise casting, processing and use of the metal pieces for slurry production.
    [10]
    Device according to claim 9, characterized in that the unit for casting the metal pieces comprises a number of furnace tubes, corresponding to the number of stations in the unit.
    [11]
    Device according to claim 9 or 10, characterized in that the unit for casting the metal pieces comprises cooling means at at least one of the stations.
    [12]
    Device according to one of Claims 9 to 11, characterized in that the unit for casting the metal pieces comprises means for mechanical processing of the pieces at at least one of the stations.
    [13]
    Device according to one of Claims 9 to 12, characterized in that the unit for casting metal pieces comprises means for transporting the pieces between the stations.
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    SE543156C2|2018-12-21|2020-10-13|Pa Invest Ab|Stirring device for a semi-solid metal slurry and method and system for producing a semi-solid metal slurry using such a stirring device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1350010A|SE538596C2|2013-01-04|2013-01-04|Method and method of casting|SE1350010A| SE538596C2|2013-01-04|2013-01-04|Method and method of casting|
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