JP5459778B2 - Water heater - Google Patents

Description

  The present invention relates to a hot water supply device used in a die casting machine.

  A hot water supply apparatus is known in which molten metal (molten metal) held in a heat-retaining furnace is pumped by a ladle and poured into an injection sleeve of a die casting machine (for example, Patent Document 1). Such a ladle is formed mainly of iron, for example. Moreover, in order to prevent the iron which comprises a ladle from melt | dissolving in the molten metal, lining is given to the iron which comprises a ladle.

JP-A-63-290673

  By repeating the hot water supply, the effect of the lining gradually decreases. And the deterioration of the quality of a cast product arises by melt | dissolution to the molten metal of iron. Therefore, the ladle is preferably exchanged at an appropriate time before an abnormality occurs based on the experience of the operator. In practice, however, workers often use various parts, including ladles, without replacement until the quality of the casting is degraded. Further, when the quality of a cast product is deteriorated, it is difficult to find out that the cause of the quality deterioration is a ladle abnormality.

  An object of the present invention is to provide a hot water supply apparatus that can reduce the risk of occurrence of defective products due to an abnormality in a ladle.

  The hot water supply apparatus of the present invention pumps out the molten metal held in the heat-retaining furnace, pours the molten metal into the injection sleeve that communicates with the cavity of the mold, and the ladle after pouring the molten metal into the injection sleeve. And a sensor for detecting the adhesion state of the molten metal.

  Preferably, the sensor detects a surface area of the molten metal attached to the ladle.

  Preferably, the sensor detects the volume of the molten metal adhering to the ladle.

  Preferably, the sensor is a vision sensor that images the ladle.

  Preferably, the hot water supply device includes an output unit that performs a predetermined notification operation when a predetermined notification condition including a condition that adhesion of molten metal is detected by the sensor is satisfied.

  Preferably, the hot water supply apparatus includes a counting unit that counts the number of hot water supplies by the ladle, and the notification condition further includes a condition that the hot water count counted by the counting unit exceeds a predetermined number.

  Preferably, the hot water supply device drives the ladle to pump and pour molten metal, and the drive to change the amount of molten metal pumped by the ladle according to the detection result of the sensor. And a control device for controlling the device.

  Preferably, the sensor outputs a detection result that changes in accordance with the amount of molten metal adhering to the ladle, and the control device changes the amount of the melt pumped out by the ladle in accordance with the change in the detection result. The drive device is controlled as follows.

  Preferably, the control device acquires only information related to the presence or absence of adhesion of the molten metal from the detection result of the sensor, and when the adhesion of the molten metal is detected, the control device determines whether the ladle is based on the information held in advance. The adhesion amount of the molten metal is calculated, and the amount of the molten metal pumped out by the ladle is changed according to the calculated adhesion amount.

  ADVANTAGE OF THE INVENTION According to this invention, the generation | occurrence | production risk of the inferior goods resulting from the abnormality of a ladle can be reduced.

The figure which shows the structure of the principal part of the die-casting machine which concerns on the 1st Embodiment of this invention. The block diagram which shows the structure of the signal processing system of the die-casting machine of FIG. The flowchart which shows the procedure of the process which the die-casting machine of FIG. 1 performs. The figure which shows the picked-up image of the sensor of the die-casting machine of FIG. The figure explaining the die-casting machine which concerns on the 2nd Embodiment of this invention. The figure explaining the die-casting machine which concerns on the modification of this invention. The block diagram which shows the structure of the signal processing system of the die-casting machine concerning the 3rd Embodiment of this invention. The flowchart which shows the procedure of the process which the die-casting machine concerning the 4th Embodiment of this invention performs.

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings. In the second and subsequent embodiments, the description of the configurations that are common or similar to the configurations of the already described embodiments may be omitted, and the same reference numerals as those of the already described embodiments are attached. There is.

(First embodiment)
FIG. 1 is a diagram illustrating a main part related to hot water supply of the die casting machine 1 according to the first embodiment of the present invention.

  The die casting machine 1 includes a mold clamping device (not shown) that holds the mold 101, an injection device 3 that injects the molten metal ML into the cavity 107 of the mold 101, and a hot water supply device 5 that supplies the molten metal ML to the injection device 3. Have.

  The mold 101 includes a fixed mold 103 and a moving mold 105 that is moved in the mold opening / closing direction with respect to the fixed mold 103. The cavity 107 is formed between the fixed mold 103 and the moving mold 105.

  The injection device 3 includes an injection sleeve 7 that communicates with the cavity 107, an injection plunger 9 that can slide in the injection sleeve 7, and an injection cylinder 11 that can drive the injection plunger 9.

  The injection sleeve 7 is formed in a cylindrical shape, and is communicated with the cavity 107 through the gate 109 by being horizontally inserted into the fixed mold 103. A hot water supply port 7 a is formed on the upper surface of the injection sleeve 7 in order to supply the molten metal ML into the injection sleeve 7.

  The injection plunger 9 has a plunger tip 13 that fits into the injection sleeve 7 and a plunger rod 15 that is fixed to the plunger tip 13 and extends from the injection sleeve 7. The molten metal supplied into the injection sleeve 7 is injected and filled into the cavity 107 as the plunger tip 13 advances toward the cavity 107.

  The injection cylinder 11 includes a hydraulic cylinder, a cylinder tube 17, a piston (not shown) that slides inside the cylinder tube 17, and a piston rod 19 that is fixed to the piston and extends from the cylinder tube 17. have.

  The piston rod 19 is connected to the plunger rod 15 via a coupling 21. The inside of the cylinder tube 17 is partitioned into two cylinder chambers by a piston (not shown). Then, hydraulic fluid (for example, oil) is selectively supplied to the two cylinder chambers, whereby a piston (not shown) moves, and the injection plunger 9 is driven.

  The hot water supply device 5 pumps out the molten metal ML held in the heat retaining furnace 151 and pours it into the hot water supply port 7 a, an arm 25 that supports the ladle 23, a base 27 that supports the arm 25, And a sensor 29 for detecting an abnormality.

  For example, the ladle 23 is formed mainly of iron and is lined. For the lining, for example, a solution obtained by adding a small amount of water glass to an aqueous solution of aluminum oxide, titanium oxide, graphite powder, kaolin, or the like is used.

  The ladle 23 includes a container main body 23a having a bottom portion and a peripheral surface portion surrounding the bottom portion, and a spout 23b protruding outward from the top of the peripheral surface portion of the container main body 23a. For example, the ladle 23 is rotatably connected to the tip of the arm 25 on the spout 23b side.

  For example, the rotation of a ladle motor 35 (see FIG. 2) built in the base 27 is transmitted to the ladle 23 via a transmission mechanism including a chain and the like built in the arm 25. Thereby, the ladle 23 is driven to incline at a desired angle.

  The arm 25 is configured by, for example, a plurality of long members rotatably connected to each other, and constitutes a link mechanism. The arm 25 is rotated at a predetermined position on the base side by an arm motor 37 (see FIG. 2) built in the base 27, so that the ladle 23 is moved to a position in the heat insulation furnace 151 as indicated by an arrow Lm. It moves between positions on the hot water supply port 7a.

  The arm 25 immerses the ladle 23 in the molten metal ML of the heat retaining furnace 151, and then the ladle 23 is pulled up from the molten metal ML, whereby the molten metal ML is pumped out by the ladle 23. Then, the ladle 23 is inclined at a predetermined angle (inclination angle θ), and a part of the pumped molten metal ML is returned to the heat insulation furnace 151, so that the molten metal ML in the ladle 23 is an amount necessary and sufficient for one shot casting. It is said. Note that the ladle 23 may be inclined at an inclination angle θ from before being immersed in the molten metal ML until it is pulled up from the molten metal ML.

  Thereafter, the ladle 23 is conveyed onto the hot water supply port 7a by the arm 25, and the ladle 23 is inclined so that the pouring port 23b is on the lower side, whereby the molten metal ML in the ladle 23 is poured into the hot water supply port 7a. . The inclination angle at this time is sufficiently large so that the molten metal ML does not remain in the ladle 23 (the inner surface of the container body 23a on the side of the spout 23b is inclined with the bottom side of the container body 23a facing upward). ).

  The sensor 29 is configured by a vision sensor that images the ladle 23. When the lining effect is reduced in the ladle 23, the molten metal ML adheres to the ladle 23 and remains after pouring the molten metal ML onto the injection sleeve 7. Therefore, the sensor 29 detects the adhesion state of the molten metal ML by imaging the ladle 23 after hot water supply. Thereby, the abnormality of the ladle 23 is detected.

  It should be noted that the sensor 29 is disposed inside the ladle 23 after pouring the molten metal ML into the injection sleeve 7 by the ladle 23 and before the ladle 23 is immersed in the molten metal ML of the heat retaining furnace 151 for the next shot. May be arranged at an appropriate position where the image can be captured. In FIG. 1, the case where the sensor 29 is arrange | positioned in the position which can image the inside of the ladle 23 immediately after pouring the molten metal ML in the injection sleeve 7 is illustrated.

  When the molten metal ML adheres to the ladle 23 after the hot water supply, a sufficient amount of the molten metal ML necessary for casting of one shot is not supplied to the injection sleeve 7. In the case where such a state continuously occurs over a plurality of shots, the amount necessary for the casting of one shot and the amount adhering to the ladle 23 after hot water supply is pumped out of the heat insulation furnace 151. Thus, it is possible to pour the injection sleeve 7 in an amount necessary and sufficient for one shot casting. Therefore, the sensor 29 is configured to detect not only the presence / absence of adhesion of the molten metal ML but also the amount of adhesion of the molten metal ML.

  FIG. 2 is a block diagram showing the configuration of the signal processing system of the die casting machine 1.

  The die casting machine 1 has a control device 31 that controls the ladle motor 35, the arm motor 37, the injection cylinder 11, and the output unit 39 based on input signals from the input unit 33 and the sensor 29.

  The input unit 33 is configured by, for example, an operation panel including a plurality of switches, and inputs a signal corresponding to a user input operation to the control device 31. The input unit 33 inputs, for example, a signal including information on the amount of hot water (set hot water amount V1) to be supplied to the injection sleeve 7 in one-shot casting based on a user input operation to the control device 31.

  The ladle motor 35 is constituted by, for example, a step motor or a servo motor. The ladle motor 35 may be a DC motor or an AC motor. The ladle motor 35 is driven by the electric power supplied from the ladle motor driver 41. The ladle motor driver 41 outputs power corresponding to the control signal from the control device 31 to the ladle motor 35.

  Similarly to the ladle motor 35, the arm motor 37 is configured by a DC type or AC type step motor or servo motor. The arm motor 37 is driven by electric power supplied from the arm motor driver 43. The arm motor driver 43 outputs electric power corresponding to a control signal from the control device 31 to the arm motor 37.

  The injection cylinder 11 is supplied with hydraulic fluid from the hydraulic circuit 45. For example, although not particularly illustrated, the hydraulic circuit 45 includes a pump, an accumulator, and a valve, and supplies hydraulic fluid to the injection cylinder 11 in response to a control signal from the control device 31.

  The output unit 39 includes, for example, any one of a display device, a speaker, and a printer as appropriate. The output unit 39 performs image display, audio output, and / or printing based on a control signal from the control device 31.

  The control device 31 is constituted by a computer including a CPU, a ROM, a RAM, and an external storage device, although not particularly shown. And each part described below is comprised when CPU runs the program memorize | stored in ROM or the external storage device.

  Based on the signal from the sensor 29, the adhesion presence / absence determination unit 47 determines whether or not the molten metal ML is adhered to the ladle 23 after hot water supply. For example, when the sensor 29 detects the surface area of the molten metal ML, the adhesion presence / absence determining unit 47 determines whether or not the detected surface area exceeds a predetermined threshold value. Is determined to be attached.

  The adhesion amount calculation unit 49 calculates the adhesion amount (correction amount V2) of the molten metal ML adhering to the ladle 23 after hot water supply based on the signal from the sensor 29 and the adhesion amount data D1. The adhesion amount calculation unit 49 may calculate the adhesion amount only when the adhesion presence / absence determination unit 47 determines that the molten metal ML is adhered to the ladle 23 after hot water supply.

  The adhesion amount data D1 holds a map in which the detection value of the sensor 29 is associated with the adhesion amount of the molten metal ML on the ladle 23. For example, when the sensor 29 detects the surface area of the molten metal ML attached to the ladle 23, the adhesion amount data D1 holds the surface area and the volume or mass of the molten metal in association with each other. Such a map is obtained by experiment etc., for example.

  The tilt angle calculation unit 51 tilts the ladle 23 when the molten metal ML is pumped from the heat retaining furnace 151 based on the set hot water amount V1 input by the input unit 33 and the correction amount calculated by the adhesion amount calculation unit 49. The angle θ is calculated.

  The ladle controller 53 controls the ladle motor driver 41 based on the tilt angle θ calculated by the tilt angle calculator 51.

  FIG. 3 is a flowchart illustrating a procedure of processing related to hot water supply performed by the hot water supply device 5 (die casting machine 1).

  The process of FIG. 3 is executed once per molding cycle in a plurality of molding cycles (shots) that are repeatedly executed. In each molding cycle, the die casting machine 1 performs mold closing and clamping of the mold 101 by a mold clamping device (not shown) before the processing of FIG. 3 is started.

  In step S1, the hot water supply device 5 performs hot water supply. That is, the control device 31 controls the arm motor 37 and the ladle motor 35 so that the melt ML is pumped from the heat retaining furnace 151 by the ladle 23 and the pumped melt ML is poured into the injection sleeve 7.

  Note that the inclination angle θ of the ladle 23 when the molten metal ML is pumped is calculated by the inclination angle calculation unit 51. In the first molding cycle after the operation of the die casting machine 1, the inclination angle θ is calculated based only on the set amount of hot water V1. That is, the inclination angle θ at which the amount of hot water pumped out by the ladle 23 becomes the set hot water amount V1 is calculated. The set hot water amount V1 is input in advance from the input unit 33 before the first molding cycle is started.

  In step S <b> 2, the hot water supply device 5 detects the adhesion state of the molten metal ML in the ladle 23. That is, the sensor 29 images the ladle 23 and outputs the captured image or a processing result based on the captured image to the control device 31.

  In step S <b> 3, the hot water supply device 5 determines whether or not the molten metal ML adheres to the ladle 23. That is, the adhesion presence / absence determining unit 47 determines the presence / absence of adhesion of the molten metal ML based on a signal from the sensor 29.

  If it is determined that the molten metal ML is attached, the process proceeds to step S4. When it determines with the molten metal ML not adhering, step S4 and S5 are skipped and a process is complete | finished.

  In step S4, the hot water supply device 5 performs a notification process for notifying the operator that the molten metal is attached to the ladle 23 after the hot water supply. For example, the control device 31 controls the display device (output unit 39) so as to display a predetermined image, or controls the speaker (output unit 39) so as to output a predetermined notification sound.

  In step S5, the hot water supply device 5 calculates the correction amount V2. That is, the adhesion amount calculation unit 49 refers to the adhesion amount data D1 and specifies the adhesion amount (correction amount V2) of the molten metal ML according to the signal (detection value) from the sensor 29. Then, the process ends.

  If it is determined in step S3 that no molten metal has adhered, the inclination angle θ is calculated based only on the set amount of molten metal V1 in the next molding cycle. That is, the inclination angle θ at which the amount of hot water pumped out by the ladle 23 becomes the set hot water amount V1 is calculated.

  On the other hand, when it is determined in step S3 that the molten metal has adhered, in the next molding cycle, the inclination angle θ is based on the set hot water amount V1 and the correction amount V2 calculated in step S5 of the current molding cycle. Is calculated. That is, the inclination angle θ at which the amount of hot water pumped out by the ladle 23 becomes the set hot water amount V1 + the correction amount V2 is calculated. Thereby, it is expected that the molten metal of the set hot water amount V1 is poured into the injection sleeve 7.

  Note that step S5 may always be executed regardless of the determination result of the presence or absence of adhesion. Even in this case, when the adhesion of the molten metal is not detected, the correction amount V2 becomes 0. Therefore, in the next molding cycle, the inclination angle θ is calculated based only on the set molten metal amount V1.

  After step S1, the die casting machine 1 performs injection of the molten metal ML into the cavity 107 by the injection device 3, mold opening by a mold clamping device (not shown), and extrusion device (not shown) in parallel with steps S2 to S5. Extrude the molded product by.

  FIG. 4A is a diagram illustrating an example of an image 111 captured by the sensor 29. FIG. 4B is an enlarged view of the region IVb in FIG.

  The image 111 includes, for example, an entire image of the inner surface of the ladle 23. In the image 111, the color of the image of the ladle 23 and the image of the molten metal ML attached to the ladle 23 are different. Therefore, the sensor 29 determines the ladle 23 and the molten metal ML based on the color of the image 111, and calculates the surface area of the molten metal ML.

  The surface area is calculated based on, for example, the number of pixels 113 determined to be the color of the molten metal ML, the area of the pixels 113, and the scale of the image 111. The area of the pixel 113 is stored by the sensor 29. Further, the scale of the image 111 may be input by the input unit 33 in advance, or may be calculated based on the actual dimensions of the ladle 23 input in advance and the dimensions of the image of the ladle 23 in the image 111.

  According to the above embodiment, the hot water supply device 5 pumps out the molten metal ML held in the heat retaining furnace 151, and pours the pumped molten metal ML into the injection sleeve 7 communicating with the cavity 107 of the mold 101. And a sensor 29 that detects the adhesion state of the molten metal ML in the ladle 23 after pouring the molten metal ML into the injection sleeve 7.

  On the other hand, as described above, when the lining effect of the ladle 23 decreases, the molten metal ML adheres to the ladle 23. Therefore, the hot water supply device 5 can detect an abnormality of the ladle 23 based on the adhesion state of the molten metal ML in the ladle 23 after hot water supply. As a result, it is possible to prompt the operator to replace the ladle 23 and the like, and the risk of occurrence of defective products due to an abnormality of the ladle is reduced.

  The sensor 29 detects the surface area of the molten metal ML adhering to the ladle 23. Therefore, the adhesion amount of the molten metal ML can be detected relatively easily and accurately. As a result, it is possible to accurately determine whether or not the molten metal has adhered, to perform notification for prompting replacement of the ladle based on the determination, or to correct the inclination angle θ of the ladle 23 accurately.

  The sensor 29 is a vision sensor that images the ladle 23. Therefore, the attachment position of the sensor 29 may be in a range where the ladle 23 after hot water supply can be imaged, and the degree of freedom is high. When the weight of the ladle 23 is detected by a strain gauge type load cell to detect the adhesion state, an error may occur due to expansion of the member due to heat. However, if it is a vision sensor, there is no such fear.

  The hot water supply device 5 is predetermined when a predetermined notification condition (in this embodiment, only the detection of adhesion is notified) including the condition that the adhesion of the molten metal ML is detected by the sensor 29 is satisfied. It has the output part 39 which performs alerting | reporting operation | movement (step S4). Therefore, as described above, the replacement of the ladle 23 can be urged at an appropriate time.

  The hot water supply device 5 changes the amount of the molten metal ML pumped out by the ladle 23 according to the detection result of the ladle motor 35 (driving device) that drives the ladle 23 so as to pump and pour the molten metal ML. And a control device 31 for controlling the ladle motor 35. Therefore, even when the molten metal ML adheres to the ladle 23 as the lining effect decreases, the amount of hot water supplied to the injection sleeve 7 can be set to an appropriate amount. As a result, the risk of occurrence of defective products due to an abnormality in the ladle is reduced.

  The sensor 29 outputs a detection result (surface area in the present embodiment) that changes in accordance with the adhesion amount of the molten metal ML on the ladle 23. The control device 31 controls the ladle motor 35 so as to change the amount of the molten metal ML pumped out by the ladle 23 in accordance with the change in the detection result. Therefore, it is possible to accurately grasp a change in the amount of adhesion of the molten metal ML accompanying the progress of the molding cycle and accurately change the correction amount of the molten metal ML pumped out by the ladle 23.

(Second Embodiment)
FIG. 5 is a schematic diagram for explaining the sensor 129 of the hot water supply apparatus according to the second embodiment of the present invention.

  The sensor 29 of the first embodiment detects the surface area of the molten metal ML, whereas the sensor 129 of the second embodiment detects the volume of the molten metal ML. Specifically, it is as follows.

  The sensor 129 measures the distance L between the inner surface of the ladle 23 or the surface of the molten metal ML at a plurality of positions on the inner surface of the ladle 23. In other words, the sensor 129 measures the inner surface of the ladle 23 and the surface shape of the molten metal ML. Then, the sensor 129 calculates the difference between the detected surface shape and the shape of the inner surface of the ladle 23 in a state in which the molten metal ML that has been acquired in advance is not attached as the volume of the molten metal ML.

  In addition, the shape of the inner surface of the ladle 23 in a state where the molten metal ML is not attached is obtained, for example, by detecting the shape of the inner surface of the ladle 23 with the sensor 129 before the molding cycle starts.

  Such a sensor 129 is constituted by, for example, a laser interferometer or an ultrasonic sensor. The sensor 129 includes, for example, a plurality of sensor elements 129a that are two-dimensionally arranged so as to face the ladle 23, and detects the distance L at the same time for a plurality of positions. The distance L may be detected for a plurality of positions by scanning the ladle 23 with one sensor element 129a or one-dimensionally arranged sensor elements 129a.

(Modification)
FIG. 6 is a schematic diagram illustrating a sensor 229 according to a modification example of the second embodiment. The sensor 229 simultaneously detects the shape of the inner surface of the ladle 23 in a state where the molten metal ML is not attached and the surface shape of the molten metal ML. Then, the difference between these shapes is calculated as the volume of the molten metal ML. Such a sensor 229 is constituted by, for example, an ultrasonic sensor.

  In the die casting machine of the second embodiment and the modified example, other configurations and operations are substantially the same as those of the first embodiment. However, since the adhesion amount can be directly detected by the sensors 129 and 229, the adhesion amount data D1 is unnecessary.

  According to the second embodiment and the modification described above, the sensors 129 and 229 detect the volume of the molten ML adhering to the ladle 23, so that the molten metal ML is more accurately compared to the first embodiment. Can be detected. As a result, it is possible to accurately determine whether or not the molten metal has adhered, to perform notification for prompting replacement of the ladle based on the determination, or to correct the inclination angle θ of the ladle 23 accurately.

(Third embodiment)
FIG. 7 is a block diagram showing a configuration of a signal processing system of the die casting machine 301 according to the third embodiment.

  In the first embodiment, the adhesion amount calculation unit 49 receives a detection value (surface area) capable of specifying the adhesion amount from the sensor 29, and calculates the adhesion amount (correction amount V2) based on the detection value. On the other hand, in the third embodiment, the adhesion amount calculation unit 349 receives only the presence / absence (V0) of adhesion from the sensor 29 via the adhesion presence / absence determination unit 47.

  When the adhesion presence / absence determination unit 47 determines that the molten metal ML is adhered to the ladle 23 after hot water supply, the adhesion amount calculation unit 349 is based only on information input in advance before the start of the molding cycle. The adhesion amount (correction amount V2) is calculated.

  Specifically, the adhesion amount calculation unit 349 calculates the correction amount V2 based on the current set hot water amount V1 and the ladle size V3 input via the input unit 33 or the like. The ladle size V3 may be the volume of the ladle 23, or may be the name of a standard of the ladle size determined by the manufacturer (for example, L, M, S).

  The adhesion amount data D3 holds a map in which the adhesion amount of the molten metal ML is associated with various combinations of the set hot water amount and the ladle size. Then, the adhesion amount calculation unit 349 calculates the correction amount V2 based on the current set hot water amount V1 and the ladle size V3 by referring to the adhesion amount data D3.

  Other configurations and operations of the die casting machine 301 are the same as those in the first embodiment.

  According to the third embodiment described above, the control device 331 acquires only the information (V0) relating to the presence or absence of adhesion of the molten metal ML from the detection result of the sensor 29, and when adhesion of the molten metal ML is detected, Based on the information (V1, V3, D3) held in advance, the adhesion amount of the molten metal ML on the ladle 23 is calculated, and the amount of the molten metal pumped out by the ladle 23 is changed according to the calculated adhesion amount.

  Accordingly, the sensor 29 may be any sensor that can detect the presence or absence of adhesion, and the number of sensor options increases. For example, when the sensor 29 detects the surface area of the molten metal ML based on imaging, the detected value of the surface area can change depending on the imaging direction of the sensor 29 with respect to the ladle 23. Therefore, in the first embodiment, it is necessary to determine the attachment position of the sensor 29 and to construct the adhesion amount data D1 in consideration of such influence. However, in the third embodiment, it is not necessary to consider such a case.

  A ladle generally has a simple shape. Therefore, for example, compared to the adhesion of the molten metal ML in the mold, the adhesion of the molten metal ML in the ladle is more likely to occur in a certain pattern, and the method for predicting the adhesion amount based on the pattern includes a plurality of ladles. There is a high possibility of sharing. As a result, as described above, the adhesion amount of the molten metal can be predicted based only on the determination result of the presence / absence of adhesion and information input in advance before the detection of the adhesion state by the sensor 29.

(Fourth embodiment)
FIG. 8: is a flowchart which shows the procedure of the process which concerns on the hot water performed by the hot water supply apparatus (die-casting machine) which concerns on the 4th Embodiment of this invention. In other words, FIG. 8 is a flowchart corresponding to FIG.

  The hardware configuration of the hot water supply apparatus of the fourth embodiment is the same as that of the first embodiment, and the reference numerals of the first embodiment are referred to in the following description.

  Steps S11, S13, S14, S18, and S19 in FIG. 8 are the same as steps S1 to S5 in FIG.

  In step S12, control device 31 increases the value of hot water supply frequency n by one. The number of times of hot water supply n is the number of times of hot water supply since, for example, the shipment of the die casting machine 1 or the replacement of the ladle 23. The number of times of hot water supply n is set to an initial value (for example, 0) by a predetermined operation on the input unit 33 or the like. Further, the value of the number of hot water supply n when the operation of the die casting machine 1 is stopped is held until the next start of operation.

  In step S15, the control device 31 increases the value of the adhesion detection count m by one. The number m of adhesion detection is, for example, the number of times when it is determined that the molten metal ML is adhered to the ladle 23 after the hot water supply, counted from the time of shipment of the die casting machine 1 or the replacement of the ladle 23. The adhesion detection frequency m is set to an initial value (for example, 0) at the same timing as the timing at which the hot water supply frequency n is set to the initial value. Further, the value m of the number of adhesion detections when the operation of the die casting machine 1 is stopped is held until the next operation start.

  In step S16, the control device 31 determines whether or not the hot water supply number n has exceeded a predetermined threshold value n0. When it is determined that the hot water supply number n has exceeded the threshold value n0, the process proceeds to step S17. If it is determined that the hot water supply number n does not exceed the threshold value n0, the process is terminated after skipping the subsequent steps.

  In step S17, the control device 31 determines whether or not the adhesion detection count m exceeds a predetermined threshold value m0. If it is determined that the adhesion detection count m exceeds the threshold value m0, the process proceeds to step S18. If it is determined that the adhesion detection count m does not exceed the threshold value m0, the process is terminated after skipping the subsequent steps.

  As described above, in the present embodiment, only when it is determined that the molten metal ML adheres to the ladle 23 based on the detection result of the sensor 29 (step S14), notification (step S18) and correction amount calculation (step) are performed. The process of S19) is not executed. When it is determined that the molten metal ML adheres to the ladle 23 based on the detection result of the sensor 29, and the hot water supply frequency n and the adhesion detection frequency m exceed the threshold values n0 and m0, notification and correction amount calculation processing Is executed.

  In other words, the hot water supply device 5 has a counting unit (the control device 31 that executes step S12) for counting the number of hot water supply n by the ladle 23, and the notification condition for performing the notification is that the sensor 29 attaches the molten metal ML. It is further included on the condition that the number of times of hot water supply n counted by the counter exceeds a predetermined number (n0) as well as the fact that is detected.

  Therefore, it is possible to suppress the notification and the correction amount calculation process from being executed due to an accident that has occurred accidentally, and to appropriately detect a decrease in the lining of the ladle 23.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The sensor that detects the adhesion state of the molten metal is not limited to a vision sensor, a laser interferometer, and an ultrasonic sensor. For example, the sensor may be a thermo viewer (two-dimensional radiation thermometer) that detects these temperatures based on infrared rays emitted from a ladle and a molten metal. That is, the adhesion state may be detected based on the fact that the temperature of the molten metal is higher than the temperature of the ladle. For example, the sensor may be a torque sensor that detects a load torque of the ladle motor (35). That is, the adhesion state may be detected based on a change in the weight of the ladle caused by the adhesion of the molten metal. Further, the vision sensor is not limited to one that performs imaging based on visible light. For example, the vision sensor may perform imaging based on infrared light or ultraviolet light.

  The notification may be performed in a different mode depending on the amount of adhesion, or may be performed in a different mode according to an increase in the number of hot water supplies.

  The calculation method of the adhesion amount of a molten metal is not limited to the method based on data (D1, D3). For example, the adhesion amount may be calculated by a predetermined calculation formula into which the detected surface area is substituted.

  When the control device calculates the adhesion amount without acquiring the information related to the adhesion amount from the sensor as in the third embodiment, the information used for the calculation is the current set hot water amount (V1) and the current ladle. It is not limited to size (V3). For example, a ladle type in which the shape of the ladle is classified, a molten metal temperature, a molten metal type, the number of times of hot water supply (n), and the number of times of adhesion detection (m) may be used.

  The division of roles between the sensor and the control device is not limited to the aspect of the embodiment. For example, in the first embodiment, the sensor may output an image to the control device, and the control device may perform image processing to calculate the surface area of the molten metal.

DESCRIPTION OF SYMBOLS 5 ... Hot-water supply apparatus, 7 ... Injection sleeve, 23 ... Ladle, 29 ... Sensor, 101 ... Mold, 107 ... Cavity, 151 ... Incubator, ML ... Molten metal.

Claims (9)

A ladle that pumps out the molten metal held in the heat-retaining furnace and pours the molten metal into the injection sleeve that communicates with the cavity of the mold;
A sensor for detecting the adhesion state of the molten metal in the ladle after pouring the molten metal into the injection sleeve;
A water heater. The hot water supply apparatus according to claim 1, wherein the sensor detects a surface area of the molten metal attached to the ladle. The hot water supply apparatus according to claim 1, wherein the sensor detects a volume of the molten metal attached to the ladle. The hot water supply apparatus according to any one of claims 1 to 3, wherein the sensor is a vision sensor that images the ladle. The hot water supply apparatus of any one of Claims 1-4 which have an output part which performs a predetermined | prescribed alerting | reporting operation | movement, when the predetermined | prescribed alerting | reporting conditions containing on condition that the adhesion of the molten metal was detected by the said sensor are satisfy | filled. . A counting unit for counting the number of hot water supply by the ladle;
The hot water supply apparatus according to claim 5, wherein the notification condition further includes a condition that the number of hot water supplies counted by the counting unit exceeds a predetermined number. A drive for driving the ladle to pump and pour molten metal;
A control device for controlling the drive device so as to change the amount of the melt pumped out by the ladle according to the detection result of the sensor;
The hot water supply device according to any one of claims 1 to 6. The sensor outputs a detection result that changes according to the amount of molten metal in the ladle,
The hot water supply device according to claim 7, wherein the control device controls the driving device so as to change an amount of molten metal pumped out by the ladle in accordance with a change in the detection result. The control device obtains only information related to the presence or absence of adhesion of the molten metal from the detection result of the sensor. The hot water supply apparatus according to claim 7, wherein the amount of molten metal pumped out by the ladle is changed according to the calculated adhesion amount.

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