JP4521616B2 - Slurry manufacturing method and slurry manufacturing apparatus - Google Patents

Description

  The present invention relates to a manufacturing method and a slurry manufacturing apparatus for slurry (semi-solid forming metal) supplied to a molding machine, and in particular, a slurry manufacturing method and slurry in which molten metal supplied to a holding container is generated into a slurry. Relates to the device.

  In recent years, a metal in a solid-liquid coexistence state, that is, a semi-solid metal (hereinafter referred to as a slurry) in a state in which a liquid phase and a solid phase coexist between a liquidus line and a solid phase line in a phase diagram is used as a material. Molding technology is drawing attention. For example, in the rheocast method, since the temperature of the slurry filled in the cavity is lower than that of the molten metal, the life of the mold is extended and the manufacturing cost is reduced. In addition, there is a low possibility that the gas in the cavity is caught in the slurry during casting, and the slurry after filling the cavity has a smaller amount of solidification shrinkage than the molten metal. A casting defect such as a shrinkage nest does not occur, and a high-quality product can be stably obtained. By the way, in the slurry processing and supplying apparatus described in Patent Document 1 disclosing such technology, the molten metal pumped up from the holding furnace is a stainless steel cup disposed in the slurry manufacturing apparatus while being electromagnetically stirred by the slurry manufacturing apparatus. Then, the slurry is obtained after being cooled and held for a certain period of time. Then, the cup is operated by an articulated robot arm, and the slurry generated in the cup is supplied to the molding machine.

  In the slurry processing supply apparatus, the empty cup after the slurry is discharged is immersed in cooling water in the water tank for a predetermined time and cooled (cooling means), and after the cooling, air is injected from the nozzle for a predetermined time. The material adhering to the inner surface (aluminum iron) is removed (cleaning means). And after the mold release agent is apply | coated to the inner surface (release agent application | coating means), the cleaned cup is mounted | worn to a slurry manufacturing apparatus with a robot arm, and a molten metal is supplied with hot water supply apparatus. Here, in order to obtain a slurry having a more suitable property for molding, temperature control of the cup immediately before the molten metal is supplied with water is extremely important. However, in the slurry processing and supply apparatus, the temperature control of the cup immediately before the molten metal is supplied is not performed. For example, when the temperature of the cup is lower than the appropriate temperature, When the slurry is rapidly cooled and dendritic crystals grow at the time of slurry generation, the fluidity of the slurry decreases when the cavity is filled, resulting in a molded product with poor hot water circulation and uneven structure.

Conversely, when the temperature of the cup is higher than the optimum temperature, the number of crystal nuclei generated on the wall surface of the cup during hot water supply is reduced, so that the structure of the molded product becomes rough and the solid phase ratio is higher than desired. Since a low slurry is produced, there is a high possibility that casting defects such as air entrainment and shrinkage will occur, and the quality of the molded product will deteriorate. Therefore, Patent Document 2 discloses a semi-molten forming metal in which a cup subjected to cleaning and release agent application is heated to a predetermined temperature by a heating furnace, and the cup maintained at the predetermined temperature is supplied to a slurry manufacturing apparatus. However, when a heating furnace is installed in the slurry processing and supply apparatus, there is a problem that the equipment becomes larger and the equipment cost increases.
JP 2006-51518 A Japanese Patent No. 3211754, paragraph number (0031), drawing (FIG. 1)

Therefore, the present invention has been made in view of the above circumstances, and a first object is to obtain a certain property, that is, a solid phase ratio and a fine granular crystal suitable for molding in order to stably obtain a high-quality molded product. It is providing the slurry manufacturing method for supplying the slurry which consists of stably.
A second object is to produce a slurry for stably supplying a slurry having a certain property, that is, a solid phase ratio suitable for molding and a fine granular crystal, in order to stably obtain a high-quality molded product. To provide an apparatus.

In order to achieve the first object, the invention described in claim 1 of the present invention is a hot water supply step of supplying molten metal to a holding container mounted on a slurry generating unit, and hot water supplied to the holding container. a slurry producing step of producing a molten metal to a slurry of solid-liquid coexistence state, and the slurry supplying step of supplying the molding machine the slurry accommodated in the holding container, the holding container wherein the slurry is discharged aquarium water a cooling step of immersion to cool to a cleaning step of cleaning the inner surface of the holding container by injecting cleaning fluid on the inner surface of the holding vessel which is cooled by the cooling step, is cleaned by the cleaning step and a slurry preparation method comprising a coating step, a for applying a release agent on the inner surface of the holding vessel, in the cleaning step, the temperature of the holding vessel to monitor during washing, temperature of the holding container Once but reaches a predetermined temperature was lowered, after completing the cleaning of the holding vessel to stop the injection of the cleaning fluid, the holding vessel was heated for a predetermined time by a heater, in the coating step, coating The temperature of the holding container at the time is monitored, and it is determined whether or not the temperature of the holding container is outside a set temperature .

In order to achieve the second object, the invention described in claim 2 of the present invention is a hot water supply means for pumping molten metal held at a predetermined temperature by a holding furnace to supply hot water to the holding container, and the holding container. a slurry producing means for producing a hot water supply molten metal to a slurry of solid-liquid coexistence state, and cooling means for cooling by immersing the storage container in which the slurry is discharged into the tank water, is cooled by the cooling means a cleaning means for cleaning the inner surface of the injection to the holding vessel cleaning fluid to the inner surface of the holding vessel, a heater for heating the holding vessel that has been cleaned by the cleaning means, which is heated by the heater and applying means for applying a release agent on the inner surface of the holding vessel, and operating means for operating the holding vessel, a slurry manufacturing apparatus including, of the holding vessel during the cleaning of said cleaning means A first temperature measuring unit for measuring the degree, and a second temperature measuring section for measuring the temperature of the holding vessel during the application of the coating means, among the holding container on the basis of the measurement result of the first temperature measuring unit Control of jetting of the cleaning fluid onto the side surface, determines whether the temperature of the holding container is within a set range based on the measurement result of the second temperature measurement unit, and determines that the temperature is outside the set range And a control unit that generates an alarm in a case where the alarm is generated .

  Therefore, in the slurry manufacturing method and the slurry manufacturing apparatus according to claims 1 and 2, it is possible to minimize variation in the temperature of the holding container at the time when the cleaning is completed.

  In order to stably obtain a high-quality molded product, a slurry production method and a slurry production apparatus for stably supplying a slurry having a certain property, that is, a solid phase ratio suitable for molding and a fine granular crystal are provided. be able to.

  An embodiment of the present invention will be described with reference to FIGS. The slurry manufacturing apparatus 1 includes a hot water supply device 4 (hot water supply means) for supplying molten metal held at a predetermined temperature by a holding furnace 2 to a stainless steel cup 3 (holding container) by a ladle 11, and hot water supply to the cup 3. A slurry generator 5 (slurry generator, slurry generator) for generating the molten metal into a solid-liquid coexisting slurry, an articulated robot arm 6 (operator) for operating the cup 3 (handling), A cup cooling device 9 (cooling means) that cools the cup 3 emptied by discharging the slurry by immersing it in water stored in the water tank 8, and the inner surface of the cup 3 cooled by the cup cooling device 9 And a cup cleaning spray device 10 (cleaning means and applying means) for applying a mold release agent to the inner side surface 3a of the cleaned cup 3.

  The slurry generating apparatus 5 includes a cup housing portion 12 in which the cup 3 is mounted with its opening facing upward by the operation of the robot arm 6, and a molten metal is applied to the cup 3 mounted on the cup housing portion 12 by the ladle 11. Hot water is supplied. And the slurry production | generation apparatus 5 starts the electromagnetic stirring of the molten metal supplied to the cup 3 with the ladle 11 at the same time as the molten metal is heated, and after the hot water supply is completed, the electromagnetic stirring of the molten metal is stopped. Thereby, it has the structure where the molten metal in the cup 3 is produced | generated by the slurry of a solid-liquid coexistence state. And in this slurry manufacturing apparatus 1, the cup 3 is taken out from the slurry production | generation apparatus 5 by operation of the robot arm 6, and it has a structure where a slurry is directly injected | thrown-in from the said cup 3 to the injection sleeve of the molding machine 7 (supply). Yes. In addition, the code | symbol 23 shown by FIG. 1 is a discharge bucket for discarding the slurry manufactured sequentially while the molding machine 7 has stopped due to troubles. As shown in FIG. 2, the cup cooling device 9 includes the water tank 8 partitioned into a water storage unit 14 and a drainage unit 15 by a partition wall 13 having a height lower than that of the side wall 8a. Further, the cup cooling device 9 is supplied with water (room temperature tap water) from the outside through the water supply pipe 16 to the water storage unit 14, and the water overflowing from the water storage unit 14 to the water discharge unit 15 is supplied to the water storage unit 14. 15 is structured to be discharged out of the water tank 8 from a drain port 17 provided at the bottom of the water tank 15.

  The cup cooling device 9 includes a cup holder 18 in which the cup 3 is mounted with the opening facing upward, and is moved up and down by driving an air cylinder 34 that is operated based on the control of the main control device 19 (control unit). The cup 3 is configured to be attached / removed to / from the cup holder 18 positioned at the rising end by the operation of the robot arm 6. The cup cooling device 9 operates based on a water temperature sensor 21 (water temperature measuring unit) that measures the temperature T of water stored in the water storage unit 14, and the water temperature T of the water storage unit 14 measured by the water temperature sensor 21. A heater 20 for heating the water stored in the water storage unit 14 and an electromagnetic valve 22 (control) for controlling the water supply to the water storage unit 14 based on the water temperature T provided in the water supply pipe 16 and measured by the water temperature sensor 21. Valve). In the cup cooling device 9, the hot cup 3 immediately after the slurry is discharged is mounted on the cup holder 18, and the cup 3 is stored in the water storage unit 14 of the water tank 8 in a state of being mounted on the cup holder 18. Soaked in water for a predetermined time. Thus, the high temperature cup 3 is cooled to a predetermined temperature.

  In the cup cooling device 9, when the cup 3 is cooled, the water stored in the water storage section 14 of the water tub 8 is deprived of heat from the cup 3, and the water temperature T of the water storage section 14 reaches the upper limit temperature TH. At that time, the electromagnetic valve 22 is actuated to the open side, whereby water is supplied from the water supply pipe 16 to the water storage unit 14 and the water stored in the water storage unit 14 is cooled by the water supply. In addition, when the water temperature T of the water storage unit 14 lowered by the water supply reaches the lower limit temperature TL, the electromagnetic valve 22 is operated to the closed side to stop water supply from the water supply pipe 16 to the water storage unit 14, and the water storage unit The cooling of the water stored in 14 is stopped. Thus, in this slurry manufacturing apparatus 1, by controlling ON / OFF of the electromagnetic valve 22 based on the water temperature T of the water storage unit 14 (measurement result of the water temperature sensor 21), the water temperature T of the water storage unit 14 is predetermined. The structure is maintained at a temperature (TL ≦ T ≦ TH). The heater 20 is used only when warming up the water temperature T of the water storage section 14 before the start of the cycle of the slurry manufacturing apparatus 1 or during a stop due to a trouble.

  As shown in FIG. 1, the cup cleaning spray device 10 includes a cleaning position P1 (cleaning means), a heating position P2, and a spray position P3 (application means). The cup cleaning spray device 10 includes a turning table 24 that is formed in a disk shape and is turned and positioned around an axis. The swivel table 24 includes three cup bases 25 which are formed in a cylindrical shape and are equally distributed around an axis (swivel axis) at an angle phase of 120 °. In the cup cleaning spray device 10, the cup 3 cooled by the cup cooling device 9 is mounted with the opening downward on the cup base 25 positioned at the cleaning position P1 by the operation of the robot arm 6. Thus, the swivel table 24 is swung around the axis by an angle phase of 120 ° so that the cup 3 positioned at the cleaning position P1 is sequentially positioned at the heating position P2 and the spray position P3. As shown in FIG. 3, each cup base 25 has a hollow portion 25 a that penetrates the turning table 24, and a cup placement portion 26 formed by step processing is provided at the upper end portion of the inner peripheral surface.

As shown in FIG. 3, at the cleaning position P1, the cup holder 27 that presses the cup 3 mounted at the cleaning position P1 against the cup base 25 and fixes it to the cup base 25, a water spray nozzle 28, and an air blower. A nozzle unit 30 including a nozzle 29, a temperature sensor 31 (first temperature measuring unit) that is provided so as to be movable back and forth in the horizontal direction with respect to the cup 3 and measures the temperature at a predetermined position of the cup 3 during cleaning Is configured. At the cleaning position P1, the nozzle unit 30 that is vertically stroked is repeatedly put into and out of the internal space of the cup 3 fixed to the cup base 25 by the cup presser 27, and the water spray nozzle 28 of the nozzle unit 30 and The aluminum rod 33 attached to the inner peripheral surface of the cup 3 is removed by the cleaning water and air sprayed from the air blow nozzle 29.

In the slurry manufacturing apparatus 1, in the cup cleaning spray apparatus 10, first, after air blowing for a predetermined time, the cup 3 is cleaned for a predetermined time by water spraying and air blowing. After the cleaning, the temperature of the cup 3 is detected by the temperature sensor 31. The cup 3 is cooled by air blow until the temperature of the cup 3 reaches a predetermined temperature. Accordingly, the temperature of the cup 3 that has been processed (cleaning and cooling) at the cleaning position P1, that is, the cup 3 heated (preheated) by the heating position P2, can be stabilized. At the heating position P2, the cup 3 cleaned and cooled at the cleaning position P1 is heated by the heater for a predetermined time (processing at the cleaning position P1) so that the release agent is easily fixed toward the next spray position P3. Heated (preheated) for a period of time. In the spray position P3, a release agent such as BN (boron nitride) sprayed from the nozzle is applied to the inner surface of the cup 3 preheated by the heating position P2. Here, at the spray position P3, the temperature of the cup 3 is monitored by the temperature sensor (second temperature measuring unit) , and the main controller 19 determines that the temperature of the cup 3 (measured value of the second temperature sensor) is the set temperature. When it is determined that it is out of range, the main controller 19 is configured to issue an alarm.

  1 is a cup buffer device on which an empty cup 3 to be supplied to the slurry manufacturing apparatus 1 is placed, and the cup 3 placed on the cup buffer device is a robot arm. 6 are sequentially supplied to the slurry production apparatus 1. P0 is a holding station in which the cup 3 in which the slurry is generated in the slurry generator 5 is transferred by the robot arm 6 and attached to the holder. In the holding station P0, the slurry in the cup 3 is naturally cooled by holding the cup 3 attached to the holder for a predetermined time, and the solid phase ratio of the slurry generated by the slurry generator 5 is further increased. ing. Then, the cup 3 containing the slurry is held at the holding station P0 for a predetermined time, and then taken out from the holder by the robot arm 6, and the slurry is put into the injection sleeve of the molding machine 7. Whether or not the holding station PO is used is selected depending on the type of molten metal, the size of the slurry, the operation cycle, and the like. In addition, the cup 3 (holding container) used in the slurry manufacturing apparatus 1 is formed in a cylindrical shape having a concave bottom portion, and the thickness of the peripheral edge portion of the opening and the bottom portion is made thinner than the thickness of other portions. Is done. As a result, the heat capacity of the opening periphery and bottom of the cup 3 having a relatively high cooling rate is reduced, and the entire cup 3 is cooled at a uniform cooling rate during cooling, so that the temperature of the cup 3 is made uniform. It has become.

  Next, this slurry manufacturing method is demonstrated. Here, an example will be described in which a 3 kg cup made of AC4C alloy is operated in a cycle of 50 seconds. First, the cup 3 (holding container) having a release agent such as BN (boron nitride) applied to the inner surface at the spray position P3 is taken out from the cup cleaning spray device 10 by operating the robot arm 6 (operation means). Then, the opening is mounted upward in the cup housing portion 12 of the slurry generating device 5 (slurry generating means). Next, the ladle 11 of the hot water supply device 4 (hot water supply means) draws a predetermined amount of molten metal in the holding furnace 2 and supplies hot water to the cup 3 (hot water supply step). And in this slurry production | generation apparatus 5, the molten metal of the cup 3 is electromagnetically stirred simultaneously with hot_water | molten_metal supply, and the slurry of a solid-liquid coexistence state is produced | generated in this cup 3 by the cooling holding | maintenance after completion of hot water supply (slurry production | generation process). . Next, the cup 3 is moved from the slurry generator 5 to the slurry holding station P0 by the operation of the robot arm 6, and the solid phase ratio of the slurry in the cup 3 is increased at the slurry holding station P0.

  During cooling and holding at the slurry holding station P0, the cup 3 that has been cooled in the cup cooling device 9 is positioned at the cleaning position P1 (cleaning means) of the cup cleaning spray device 10 by operating the robot arm 6. The cup 3 with the opening placed downward on the cup base 25 and the release agent applied to the inner surface at the spray position P3 by the operation of the robot arm 6 is taken out from the cup cleaning spray device 10 and opened. It is mounted upward in the cup housing part 12 of the slurry generator 5. Next, the slurry cooled and held in the slurry holding station P0 is supplied from the cup 3 to the injection sleeve of the molding machine 7 by operation of the robot arm 6 (slurry supply process). Then, the cup 3 emptied by discharging the slurry is mounted with the opening upward in the cup holder 18 of the cup cooling device 9 (cooling means) by the operation of the robot arm 6.

  And the cup 3 with which the cup holder 18 was mounted | worn is immersed in the water (40 degreeC) stored by the water storage part 14 of the water tank 8 only for predetermined time (5 second), and is cooled from 570-590 degreeC to 100-120 degreeC. (Cooling step). Here, in the cup cooling device 9, when the water temperature T of the water storage section 14 of the water tank 8 reaches the upper limit temperature TH (45 ° C.) when the cup 3 is cooled, the electromagnetic valve 22 is operated to the open side to supply water. Water is supplied from the pipe 16 to the water storage unit 14, and the water stored in the water storage unit 14 is cooled by the water supply. And when the water temperature T falls in the water storage part 14 by this water supply and this water temperature T reaches minimum temperature TL (40 degreeC), the said electromagnetic valve 22 will act | operate to the close side and water supply will stop. Next, the cup 3 that has been cooled in the cup cooling device 9 is mounted with the opening facing downward on the cup base 25 positioned at the cleaning position P1 (cleaning means) of the cup cleaning spray device 10 by operating the robot arm 6. The cup holder 25 is fixed by a cup presser 27.

  In this state, the nozzle unit 30 is repeatedly stroked up and down, and the aluminum rod 33 adhering to the inner peripheral surface of the cup 3 is caused by the cleaning water and air sprayed from the water spray nozzle 28 and the air blow nozzle 29 of the nozzle unit 30. Removed (cleaning step). Here, in the cleaning position P1, the cup 3 is first washed with air spray and air blow for a predetermined time (1.5 seconds) after air blowing for a predetermined time (10 seconds), and further the temperature at the predetermined position is set to a predetermined temperature (80 It is cooled by air blow until it reaches (° C.). When the processing at the cleaning position P1 is completed and the cup 3 is released from the pressing force by the cup presser 27, the turning table 24 is turned by 120 ° in a predetermined direction (clockwise direction in FIG. 1), and the cup 3 is moved. The cleaning position P1 is moved to the heating position P2. In the heating position P2, the cup 3 is heated by the heater for a predetermined time (the next cup 3 is in the cleaning position P1) so that the release agent is easily fixed on the inner peripheral surface 3a in the next spray position P3 (coating means). It is heated (preheated) only during processing.

  When the preheating of the cup 3 is completed (the processing of the next cup 3 at the cleaning position P1 is completed), the turning table 24 is turned by 120 ° in a predetermined direction (clockwise direction in FIG. 1), and the first cup 3 is moved. It is moved from the heating position P2 to the spray position P3. In the spray position P3, the release agent sprayed from the nozzle is applied to the inner surface of the preheated cup 3 (application process). Then, the cup 3 coated with the release agent is taken out of the cup cleaning spray device 10 by the operation of the robot arm 6 and mounted on the cup housing portion 12 of the slurry generating device 5 with the opening facing upward.

This embodiment has the following effects.
In the slurry manufacturing apparatus 1, in the cup cooling device 9 (cooling means), when the water temperature T of the water storage unit 14 of the water tank 8 rises and the water temperature T reaches the upper limit temperature TH, the water storage unit 16 is supplied from the water supply pipe 16. The water supplied to 14 and stored in the water reservoir 14 is cooled. Further, when the water temperature T of the water storage section 14 drops and the water temperature T reaches the lower limit temperature TL, the water supply is stopped.
Therefore, in this slurry manufacturing apparatus 1, the water temperature T of the water storage part 14 of the water tank 8 in the cup cooling device 9 is maintained in the range from the lower limit temperature TL to the upper limit temperature TH, and the cup 3 is kept in the water of the water storage part 14 for a predetermined time. Since it is only immersed and cooled, the temperature of the cup 3 after cooling can be stabilized.

  Moreover, in this slurry manufacturing apparatus 1, in the cup cleaning spray apparatus 10 (cleaning means and coating means), the cup 3 is cleaned for a predetermined time by air spray and air blow after a predetermined time of air blowing, and the temperature at a predetermined position is further increased. Since it is cooled by air blow until it reaches a predetermined temperature, the temperature of the cup 3 after washing and cooling can be stabilized.

  Thereby, in this slurry manufacturing apparatus 1, when the temperature of the cup 3 attached to the slurry generating apparatus 5 (slurry generating means) is stabilized, the slurry property generated in the cup 3, that is, a solid phase suitable for molding. Rate and fine grain structure can be maintained. Then, by using a slurry having stable properties (solid phase ratio and structure), a high-quality molded product (product) can be stably obtained.

In addition, embodiment is not limited above, For example, you may comprise as follows.
In the cup cooling device 9, the temperature of the cup 3 that has been processed (cooled) is unified, that is, the temperature variation between the cups 3 is eliminated, and the temperature of the cup 3 that is finally supplied to the slurry generating device 5 is stabilized. If this requirement is satisfied, the upper limit temperature Th and the lower limit temperature Tl of the water temperature T of the water storage section 14 and the time for immersing the cup 3 in the water stored in the water storage section 14 (cooling time) May be appropriately set as necessary.
In the cleaning position P1 of the cup cleaning spray device 10, the portion of the cup 3 whose temperature is measured by the temperature sensor 31 ( first temperature measuring unit) is unified between the cups 3, that is, the temperature variation between the cups 3 is eliminated. It is important to stabilize the temperature of the cup 3 that is finally supplied to the slurry generating apparatus 5. If this requirement is satisfied, the temperature of any part of the cup 3 may be measured.

It is a top view which shows the outline of this slurry manufacturing apparatus containing a molding machine. It is explanatory drawing of a cup cooling device (cooling process). It is explanatory drawing of a cup washing | cleaning spray apparatus, Comprising: It is a figure which shows the structure of a washing | cleaning position (washing | cleaning process) especially.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slurry manufacturing apparatus, 2 holding furnace, 3 cup (holding container), 4 hot water supply apparatus (hot water supply means), 5 slurry production apparatus (slurry production | generation part, slurry production means), 6 robot arm (operation means), 7 molding machine, 8 water tank, 9 cup cooling device (cooling means), 10 cup cleaning spray device, 19 main control device (control unit), 31 temperature sensor ( first temperature measurement unit)

Claims (2)

A hot water supply process for supplying molten metal to a holding container attached to the slurry generation unit, a slurry generation process for generating molten metal supplied to the holding container into a slurry in a solid-liquid coexistence state, and the holding container A slurry supplying step for supplying the slurry to a molding machine, a cooling step for immersing and cooling the holding container from which the slurry has been discharged in water in a water tank, and an inner surface of the holding container cooled by the cooling step A slurry manufacturing method comprising: a cleaning step of spraying a cleaning fluid to clean the inner surface of the holding container; and an application step of applying a release agent to the inner surface of the holding container cleaned by the cleaning step. There,
In the cleaning step, the temperature of the holding container at the time of cleaning is monitored, and when the temperature of the holding container reaches a predetermined temperature after the temperature of the holding container is lowered, the cleaning fluid is stopped and the holding container is cleaned. After completion , the holding container is heated by a heater for a predetermined time,
In the coating step, the temperature of the holding container at the time of coating is monitored, and it is determined whether or not the temperature of the holding container is outside a set temperature . A hot water supply means for pumping molten metal held at a predetermined temperature by a holding furnace and supplying hot water to the holding container; slurry generating means for generating the molten metal supplied to the holding container into a solid-liquid slurry; and Cooling means for immersing and cooling the discharged holding container in water in a water tank, and cleaning the inner surface of the holding container by spraying a cleaning fluid onto the inner surface of the holding container cooled by the cooling means Cleaning means, a heater for heating the holding container cleaned by the cleaning means, an application means for applying a release agent to the inner surface of the holding container heated by the heater, and an operation for operating the holding container A slurry production apparatus comprising:
A first temperature measuring section for measuring the temperature of the holding vessel during the cleaning of the cleaning means,
A second temperature measurement unit for measuring the temperature of the holding container at the time of application of the application means;
Based on the measurement result of the first temperature measurement unit, the ejection of the cleaning fluid onto the inner surface of the holding container is controlled, and the temperature of the holding container is set within a set range based on the measurement result of the second temperature measurement unit And a control unit that generates an alarm when it is determined whether or not it is within a set range .

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