• 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 foundry sand preparation apparatus includes a receptacle into which is fed sand to be processed. The temperature and moisture content of the sand being fed in is monitored by sensors. Signals from these sensors are used to control the quantity of water sprayed into or within the receptacle wherein meshing mixers mix the water and sand. The level of the sand in the receptacle is monitored and a signal is produced to control the speed of a belt conveyor which removes processed sand from the bottom of the receptacle, the level also being used to influence water input rate. <IMAGE>
    公开号:SU1052148A3
    申请号:SU813361405
    申请日:1981-12-11
    公开日:1983-10-30
    发明作者:Майер Отто
    申请人:Георг Фишер Аг (Фирма)；
    IPC主号:
    专利说明:

    2. The device according to claim 1, which is designed so that the device for unloading is made
    in the 9th endless ribbon.
    3. The device according to paragraphs. 1 and 2, with the fact that it is equipped with a motorized damper installed above the discharge port.
    4. The device according to claim 1, distinguishes W e e in that the mixing apparatus is made in the form of rotating shafts, the mixing elements of which fit into each other with a gap.
    The invention relates to equipment for the preparation of foundry sand.
    A device for preparing and simultaneously cooling molding sand is known, in which the cooling section is followed by preparation device C13. The device for preparing foundry molding sand containing a container with a loading device and an unloading hole is the closest to the invention in its technical essence and achievable result. , the mixing equipment located therein, the unloading device located at the bottom of the tank, the water supply lines to the tank, Commercially tori flow controller associated with the sensor through an amplifier C2 temperature.
    A common disadvantage of the known devices is the poor quality of sand processing.
    The purpose of the invention is to improve the quality of niscKa.
    The goal is achieved by the fact that a device for preparing casting sand containing a container with a device for loading sand and an opening for unloading, a mixing apparatus accommodated therein, a device for unloading located 8 at the bottom of the tank, pipelines for supplying water to the tank The flow tori connected through an amplifier with a temperature sensor are equipped with indicators of the upper and lower levels of sand in the tank and a humidity sensor, and the discharge device is equipped with a drive It forms the bottom of the chamber, while the temperature and humidity sensors are electrically connected to the water flow regulators independently of each other, and the fill level indicators are electrically connected to the drive of the unloading device and to the water flow regulators, and the temperature and humidity sensors are located at sand loading devices.
    Device for unloading you. Completed in the form of an endless ribbon. 5 The device is equipped with a motorized damper installed above the discharge for unloading.
    1 Mixing equipment in Full 1 in the form of rotary shafts, mixing elements of the latter enter into each other with a gap.
    The drawing shows a general scheme of the device.
    The device enters the open 5 at the top of the preparatory tank 1, also called the homogenization tank or mixing space.
    The sand is poured into the tank 1 through the loading tray 2 and fills it to a certain height. Instead of a tray, you can install a conveyor belt of any kind. The height is controlled by the upper and lower level indicators 3 and 4. The fill level indicators can be weight cells, so in this case the filling is regulated by the weight of the sand to be poured.
    In the tank 1 itself there is a mixing apparatus in the form of several entering one another, extending along or across the rotating shafts 5 with mixing tools 6. The bottom of the tank 1 is formed by an endless discharge body 7 in the form of a tape, which unloads the sand at an adjustable speed.
    The temperature sensing element 8 is located in the Place of supply of sand in the tank 1 in such a way that it registers sand coming from tray 2. Element 8 can be made in the form of an infrared probe, 5 The same humidity sensor element 9 is placed in the same way. Humidity measurement can be carried out by measuring electrical resistance or capacitance or the power consumption of the mixing tools. Two pipes 10 and 11
    Water supply with raeboegative nozzles 12 are located above or inside the tank 1 and serve to moisten the sand.
    Both sensing elements 8 and 9, which are located outside the spray area of the nozzles 12, control independently of each other a variable supply of water. The sensing element 8 is connected to the converter 13, which turns the temperature measurement signal into the control signal i affecting the flow of the corresponding amount of water in the pipe 10. In the same way, the sensitive element 9 of the humidity is connected to the converter 14, which produces a control signal relative to the amount of water in the pipe 11 stocks: yes water. . . . , //. : The two-part status indicator | Thier 3 and 4 filling levels are connected to: transform.1 15, conversion (this fill-level indicator signal into a control signal that changes the transport unload rate, for example, through a direct current motor, in such a way that the field: HOW the mixing tank -1 remains constant within, the limit ea Ix of the upper and lower indices are the "1 and 3 and 4 filling levels: rE). Further, preconditioning units 16 and 17 are provided, which, as a function of the discharge rate, affect the flowing quantities of water. Supply pipes 10 and 11. I In the tank 1, the sand is thoroughly mixed together with mixing tools with water coming from the nozzles 12. Then prepared: the sand is guided by a Tpajj spider through another transport vehicle 18 or directly to a cooling device (not shown). The total amount supplied is chosen such that the sand after cooling has a predetermined moisture value at room temperature. The water required for subsequent evaporation is added depending on the instantaneous sand rate and its instantaneous temperature. This eliminates the need for a constant flow of sand. Since the amount of sand from the loading tray 2 can be varied, the discharge rate and thus the discharge quantity Q., which can still be moved by 1 vertically up or down by the flap 19, is adjusted so that the filling level fluctuates in the selected range.
    With a decreasing flow of sand
    5, the fill level is first lowered below a certain elevation indicator. This causes a slow through converter 15
    0 decrease in the speed of unloading with a conveyor belt until it is surpassed, determined: divided by the indicator of level 4, the level mark in height,
    whereupon the discharge rate and thus the discharge amount of .Qg remains constant. With increasing flow of sand, on the contrary, the upper level mark in height is exceeded, which likewise
    0 entails an acceleration of the conveyor belt until the filling level falls below the upper mark.
    The amount of water Qi added to the temperature functions is corrected in proportion to the unloaded amount of sand. Similarly, the amount of water Qf added to the function of moisture content;
    0 is adjusted by the progrmation of the amount of Y. The total addition of the amount of water Q is:
    fisQ + fip,
    45 and
    e, 4pFfe ic
    权利要求:
    Claims (4)
    [1]
    1. DEVICE for preparing foundry sand, containing a container with a device for loading sand and an unloading hole, a mixing apparatus placed in it, an unloading device located in the lower part of the tank, water supply pipes to the tank having flow controllers connected through an amplifier with a temperature sensor, which requires that, in order to improve the quality of sand, it is equipped with indicators of upper and lower levels of sand in the tank and a humidity sensor, and the device for The unit is equipped with a drive and forms the bottom of the chamber, while the temperature and humidity sensors are electrically connected to the water flow controllers independently of each other, and the fill level indicators are electrically connected to the drive of the discharge device and to the flow controllers, and the temperature and humidity sensors are located at the device for sand loading.
    ^ SU .. 1052148
    [2]
    2. The device according to π.
    [3]
    3. The device according to paragraphs. 1 and 2, characterized in that it is provided with a drive flap mounted above the discharge opening.
    [4]
    4. The device according to π. 1, the difference is that the mixing equipment is made in the form of rotating shafts, the mixing elements of which enter into each other with a gap.
    类似技术:
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    SU1741108A1|1992-06-15|Apparatus for regulation humidity of free-flowing material
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    同族专利:
    公开号 | 公开日
    JPS57121850A|1982-07-29|
    IT8125431D0|1981-12-03|
    GB2089700A|1982-06-30|
    IT1139899B|1986-09-24|
    FR2495974A1|1982-06-18|
    DE3147131A1|1982-09-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2478020C2|2011-05-24|2013-03-27|Закрытое Акционерное Общество "Литаформ"|Method of making sand blend and device to this end|FR1536193A|1965-10-23|1968-08-27|Nat Eng Co|Plant for the preparation of foundry sand|
    US3362585A|1965-12-23|1968-01-09|Fischer & Porter Co|Dry chemical feeder|
    US4108188A|1977-07-25|1978-08-22|Foundry Technology, Inc.|Sand cooler control system|US4598759A|1984-01-20|1986-07-08|Grede Foundries Inc.|Apparatus for automated mixing and transport of chemically bonded sand mixtures for casting|
    GB2171325B|1985-02-23|1988-04-20|Blockleys P L C|Manufacture of clay products|
    US6638550B2|2000-03-21|2003-10-28|Mars, Inc.|Method for coating solid confectionery centers|
    US6776954B1|2000-05-31|2004-08-17|Honeywell International Inc.|Recycle methods for water based powder injection molding compounds|
    FR2828415B1|2001-08-08|2003-10-17|P L C D|PROCESS AND PLANT FOR MIXING GRANULTATES WITH CONTINUOUS MEASUREMENT OF MOISTURE RATE|
    DE102010018751B4|2010-04-29|2015-08-13|Laempe & Mössner GmbH|Method and device for producing molds or cores, in particular for foundry purposes|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH918680|1980-12-12|
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