JP2014069219A - Monitor display means, molding apparatus using the same and monitor display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide monitor display means which enables a user to easily and visually check relation between change with time of physical quantity such as gas pressure in a cavity, pressure and temperature of molten metal, or the like, and filling start time and filling end time, and to provide a molding apparatus using the monitor display means, and a monitor display method.SOLUTION: The monitor display means includes: a physical quantity information display part for displaying, on a monitor 54, information of physical quantity indicating at least one of gas pressure in a cavity of a metal mold, molten metal pressure, and molten metal temperature, using a coordinate in a time direction; a cursor display part for displaying, on the monitor, filling start information and filling end information of molten metal in the cavity, according to the coordinate, respectively as first cursors 64, 66 extending along a coordinate orthogonal to the coordinate in the time direction, and crossing curves on the monitor, indicating the information of the physical quantity; and a background color display part for displaying background color of a first area 72 sandwiched by the first cursors on the monitor, so as to be different from background color of areas except the first area, on the monitor.

Description

  The present invention relates to a monitor display means for a molding apparatus typified by a die casting apparatus for pressure casting a metal material such as an aluminum alloy or magnesium, in particular, a change in a physical quantity such as a molten metal in a cavity and a filling start time of the molten metal, The present invention relates to a monitor display means capable of visually confirming the relationship between filling end times, a molding apparatus using the same, and a monitor display method.

  The operation of the die casting apparatus for molding the die cast product is as follows (see FIG. 2). First, the molten metal is supplied to the sleeve opened to the runner, and the plunger is driven at a low injection speed in order to avoid the entrainment of air of the molten metal, and moves forward until the sleeve and the runner are full. Next, when the plunger moves to a position where the tip of the molten metal reaches the gate of the mold, the plunger is switched to a high injection speed and driven to rapidly fill the cavity of the mold with the molten metal. Next, when the molten metal is filled in the cavity of the mold, the pressure of the plunger is increased to pressurize the molten metal.

  By the way, if it can be determined for each casting shot whether or not the die-cast product has sufficient strength, it is possible to prevent the defective product from flowing to the subsequent process, and as a result, the yield can be improved. . Therefore, when casting a die-cast product by injecting molten aluminum alloy or other molten metal (molten metal) into a cavity formed in a mold using a die-casting device, for the quality control, at the time of injection It is necessary to measure the pressure of the molten metal in the mold, the temperature of the molten metal, and the gas pressure at which the gas in the cavity is compressed by filling the molten metal. Important in production.

  For this reason, Patent Document 1 discloses a mold internal information measuring sensor capable of measuring the gas pressure in the cavity, the pressure and temperature of the molten metal. Patent Document 2 discloses a molten metal detection sensor that detects the presence of molten metal by contacting the molten metal. By disposing the molten metal detection sensor in the vicinity of the gate and the entrance of the gas vent path, the filling start time and filling end time of the molten metal into the cavity can be known, and the filling time can also be calculated.

JP 2012-121070 A JP 2011-056537 A

  Therefore, if time transitions of physical quantities such as gas pressure in the cavity, molten metal pressure and temperature, and the filling start time and filling end time can be displayed on the same coordinates, the quality control of the die-cast product can be easily performed. . However, it is not easy to visually confirm the relationship between the temporal transition of the physical quantity and the filling start time and filling end time.

  Therefore, the present invention pays attention to the above-mentioned problems, and the relationship between the temporal transition of physical quantities such as the gas pressure in the cavity, the pressure and temperature of the molten metal, and the filling start time and filling end time can be easily confirmed visually. An object is to provide a monitor display means, a molding apparatus using the same, and a monitor display method.

  In order to achieve the above object, the monitor display means according to the present invention includes a continuous information display unit that displays continuous information in time on a monitor using coordinates in a time direction, and the continuous information display unit includes the continuous information. Trigger information input during display of the monitor extends along the coordinates orthogonal to the coordinates, and corresponds to the monitor as a partition line that intersects the curve on the monitor represented by the continuous information. And a background color display unit for displaying the background color on the monitor with the partition line as a boundary.

  With the above configuration, since the background color of the monitor on which continuous information is displayed can be changed with the partition line based on the trigger information as a boundary, the relationship between the continuous information and the trigger information can be easily visually recognized on the monitor. It becomes a monitor display means.

  Further, the monitor display means according to the present invention is a physical quantity information display unit for displaying information on a physical quantity representing at least one of the gas pressure, the molten metal pressure, and the molten metal temperature in the mold cavity on the monitor using coordinates in the time direction. And the filling start information and the filling end information of the molten metal in the cavity as the first partition lines extending along the coordinates orthogonal to the coordinates and intersecting the curve on the monitor represented by the physical quantity information, respectively. And a background color of a first area sandwiched between the first partition lines on the monitor and a background color of an area other than the first area on the monitor. And a background color display unit for displaying differently.

  With the above configuration, the background color of the portion sandwiched between the first partition lines is different from the background color of the other portions. Therefore, a portion of the physical quantity information curve sandwiched between the two first partition lines can be easily seen on the screen, thereby providing a monitor display means capable of improving work efficiency.

  In the present invention, the cursor display unit detects output information indicating that a drive signal for operating a valve body that shuts off the gas vent path of the cavity is output, and shuts off the gas vent path of the valve body. Blocking detection information indicating that it has been performed is displayed on the monitor as a second partition line corresponding to the coordinates, and the background color display portion is a second partition line sandwiched between the second partition lines on the monitor. The background color of the area is displayed differently from the area other than the second area on the monitor.

  With the above configuration, the background color of the portion sandwiched between the two second partition lines is different from the background color of the other portions. Therefore, the portion sandwiched between the two second partition lines in the physical quantity information curve can be easily visually recognized on the screen, and the work efficiency can be improved.

On the other hand, a molding apparatus according to the present invention is a molding apparatus including the above-described monitor display means, and includes a physical quantity sensor that measures the physical quantity and outputs information on the physical quantity, and a molten metal that flows into the gate of the cavity. An inlet sensor that detects and outputs a first detection signal, and an outlet sensor that detects the molten metal flowing into the inlet of the degassing passage of the cavity and outputs a second detection signal are attached to the mold, The first detection signal and the second detection signal are input, the filling start information is generated based on the time information when the first detection signal is input, and the time when the second detection signal is input A control unit is provided for generating the filling end information from the information and outputting the information to the monitor display means.
With the above configuration, the relationship between the physical quantity information curve and the first cursor can be confirmed in real time.

Further, a molding apparatus according to the present invention is a molding apparatus including the above-described monitor display means, and includes a physical quantity sensor that detects the physical quantity and outputs information on the physical quantity, and a molten metal that flows into the gate of the cavity. An inlet sensor for detecting and outputting a first detection signal; an outlet sensor for detecting a molten metal flowing into the inlet of the degassing path of the cavity and outputting a second detection signal; and a degassing path of the valve body. A shut-off detection switch that detects a shut-off and outputs a shut-off detection signal is mounted on the mold and outputs the output information to the monitor display means, and the first detection signal, the second detection signal, The filling start information is generated based on the time information when the shutoff detection signal is input, the first detection signal is input, and the time information when the second detection signal is input. A control unit is provided that generates the filling end information, generates the blocking detection information based on time information when the blocking detection signal is input, and outputs the blocking detection information to the monitor display unit. .
With the above configuration, the relationship between the physical quantity information curve and the first and second partition lines can be confirmed in real time.

  In the present invention, the inlet sensor and the outlet sensor have a recess having an opening directed toward the cavity, and a holder that is mounted on the mold, and is electrically insulated from the holder. An electrode rod which is accommodated in the recess and passes through the bottom of the recess and is exposed to the outside of the holder, and the molten metal is detected by an electrical short circuit when the molten metal contacts the holder and the electrode rod at the same time. The lead wire extends from the end portion exposed from the holder of the electrode rod.

  With the above configuration, the holder, the electrode rod, and the lead wire are arranged concentrically. Therefore, since the inlet sensor and the outlet sensor can be attached only by forming the attachment hole that penetrates straight to the mold, the attachment work can be easily performed.

  On the other hand, the monitor display method according to the present invention displays temporally continuous continuous information on a monitor using coordinates in the time direction, and trigger information input while the continuous information is displayed, Is displayed on the monitor corresponding to the coordinates as a partition line that extends along a coordinate orthogonal to the curve and intersects a curve on the monitor represented by the continuous information, and the background color on the monitor is indicated by the partition line. It is characterized by being displayed differently as boundaries.

  According to the above method, the background color of the monitor on which the continuous information is displayed can be changed with the partition line based on the trigger information as a boundary, so that the relationship between the continuous information and the trigger information can be easily visually recognized on the monitor.

  Further, the monitor display method according to the present invention displays information on a physical quantity representing at least one of gas pressure, molten metal pressure, molten metal temperature in a mold cavity on a monitor using time-direction coordinates, and the cavity The molten metal filling start information and filling end information correspond to the coordinates as first partition lines extending along the coordinates orthogonal to the coordinates and intersecting the curve on the monitor represented by the physical quantity information. Displaying on the monitor and displaying a background color of the first region sandwiched between the first partition lines on the monitor different from a background color of the region other than the first region on the monitor. And

  By the above method, the background color of the portion sandwiched between the first partition lines is different from the background color of the other portions. Therefore, the portion sandwiched between the two first partition lines in the physical quantity information curve can be easily viewed on the screen, and the work efficiency can be improved.

  According to the monitor display means and the monitor display method according to the present invention, the background color of the region between the molten metal filling start time and the filling end time is changed to a color different from the background color of other regions. Therefore, the portion of the physical quantity information curve that is included in the molten metal filling time range can be easily visually recognized, so that the work efficiency can be improved. Moreover, according to the molding apparatus provided with this monitor display means, the relationship between the physical quantity information and the filling time range can be confirmed in real time.

It is a figure which shows the graph displayed on a monitor by the monitor display means of this embodiment. It is a schematic diagram of the die casting apparatus of this embodiment. It is a control block diagram of the die casting apparatus of this embodiment. It is sectional drawing of the attachment form of the molten metal detection sensor of this embodiment. It is an exploded sectional view of a molten metal detection sensor. It is sectional drawing of the attachment hole to which the molten metal detection sensor of this embodiment is attached.

  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .

  FIG. 2 shows a schematic diagram of the die casting apparatus of the present embodiment. As shown in FIG. 2, the die casting apparatus 10 (molding apparatus) has a mold 12 including a fixed mold 14 and a movable mold 16. A cavity 18 serving as a mold for die-casting is formed on the mating surface of the fixed mold 14 and the movable mold 16. A gate 24 for introducing the molten metal 22 extruded from the molten metal injection device 20 into the cavity 18 is connected to the cavity 18. The molten metal injection device 20 is connected to a runner 26 of the mold 12 and includes a hollow sleeve 28 and a plunger 30 disposed in the sleeve 28. The molten metal 22 is supplied into the sleeve 28 from a molten metal supply device (not shown), and the molten metal 22 is injected into the cavity 18 through the gate 24 when the plunger 30 is pushed out. The plunger 30 is operated by injection driving means (not shown).

  On the other hand, a gas vent path 32 for venting gas from the cavity 18 is disposed at the outlet of the cavity 18, and a valve element 34 capable of opening and closing the gas vent path 32 is disposed in the gas vent path 32. . The valve body 34 is supported in a slidable state by the fixed mold 14 (or the movable mold 16). As will be described later, while the molten metal 22 is filled in the cavity 18, the valve body 34 opens the gas vent path 32 and allows the gas extruded by the molten metal 22 to pass therethrough. The operation of shutting off the gas vent path 32 can be performed almost simultaneously with the filling time. The fixed mold 14 is provided with driving means 36 for driving the valve body 34. When the valve body 34 is arranged to open the gas vent passage 32, the valve body 34 abuts on the valve body 34 and outputs an opening detection signal. An open detection switch 38 and a shutoff detection switch 40 that abuts against the valve body 34 and outputs a shutoff detection signal when the valve body 34 is arranged to shut off the gas vent path 32 are provided.

  An inlet sensor 42 that detects the molten metal 22 and outputs a first detection signal is disposed in the gate 24 that communicates with the cavity 18, and the molten metal 22 is also detected at the inlet (a detection cavity 46 described later) of the gas vent path 32. An outlet sensor 44 that outputs two detection signals is arranged. A mold internal information measurement sensor 48 (physical quantity sensor) for measuring a physical quantity (gas pressure, molten metal pressure, molten metal temperature) in the detection cavity 46 is arranged in the movable mold 16 (which may be the fixed mold 14). . Here, the detection cavity 46 is a cavity filled with the molten metal 22 like the cavity 18, and forms an island-like member extending from the die-cast product after the molten metal 22 is filled. This island-shaped member is cut out after the die-cast product is taken out from the mold 12. The above-described mold internal information measuring sensor 48 is a conventional technique (see Patent Document 1), and thus description thereof is omitted.

  The open detection switch 38, the shutoff detection switch 40, the mold internal information measurement sensor 48, the entrance sensor 42, and the exit sensor 44 are connected to a PC (personal computer) 50 having the monitor display means 56 and the control unit 76 of the present embodiment. The driving unit 36 is connected to the PC 50 via the driver 52. Further, as will be described later, in order to output detection signals from the inlet sensor 42 and the outlet sensor 44, the mold 12 and the PC 50 (control unit 76) are electrically connected by a lead wire 126. The PC 50 includes a monitor 54 that displays a time transition of physical quantity information, and also includes a monitor display unit 56 and a control unit 76 according to the present embodiment.

  The die casting apparatus 10 of the present embodiment may be an air release type die casting apparatus 10 by opening the gas vent path 32 to the atmosphere, or may be a vacuum die casting type die casting apparatus 10 that performs vacuuming from the gas vent path 32. .

  FIG. 1 shows a graph displayed on the monitor by the monitor display means of this embodiment. FIG. 1 is a diagram in which a change waveform of the injection speed of the plunger 30, injection pressure, gas pressure in the cavity 18, pressure of the molten metal 22, and temperature of the molten metal 22 is displayed in time series along the time axis. is there. The plunger 30 moves in a direction in which the molten metal 22 is injected into the cavity 18, but the injection speed of the plunger 30 is supplied to the runner 26 before the molten metal 22 reaches the gate 24 by the extension of the plunger 30. During this period, the injection speed is kept low. However, when the tip of the molten metal 22 exceeds the gate 24 and the molten metal 22 starts to be supplied to the cavity 18, the injection speed becomes high, and when the molten metal 22 is filled in the cavity 18, the injection speed becomes zero.

  On the other hand, the injection pressure of the plunger 30 takes a substantially constant value while the plunger 30 is moving at the initial low injection speed and the high injection speed. Thereafter, the injection pressure rises upon completion of filling, and rapidly rises due to the pressure increasing operation of the injection driving means. On the other hand, while the plunger 30 is moving at a high injection speed, the pressure of the molten metal 22 hardly increases. On the other hand, when the molten metal 22 in the cavity 18 is filled, the pressure of the molten metal 22 rises to almost the injection pressure of the plunger 30 due to the blockage of the gas vent passage 32 of the valve body 34, but the molten metal 22 of the gate 24 solidifies and falls. Start. As described above, in the die casting apparatus 10, the time transition of the gas in the cavity 18 and the physical quantity of the molten metal 22 and the filling start time and the filling end time of the molten metal are correlated with each other. It is necessary to grasp the relationship between information.

  As shown in FIG. 1, the physical quantity information (including the injection speed and injection pressure of the plunger 30) is displayed on the monitor 54. In this embodiment, the filling start time of the molten metal 22 is added to this information. A first cursor 64 (first partition line) representing the first cursor 66 (first partition line) representing the filling end time of the molten metal 22 extends in an axial direction perpendicular to the time axis, and represents physical quantity information. Displayed as a straight line intersecting the curve. Furthermore, an area (first area 72) between the first cursor 64 and the first cursor 66 on the monitor 54 is displayed in a different color from the other areas of the monitor 54. Therefore, in the physical quantity information curve, the portion sandwiched between the first cursor 64 and the first cursor 66 can be easily seen on the screen of the monitor 54, and the work efficiency can be improved.

  FIG. 3 shows a control block diagram of the die casting apparatus of this embodiment. The die casting apparatus 10 of this embodiment includes a control unit 76 and a monitor display unit 56 (physical quantity information display unit 58, cursor display unit 60, background color display unit 62). The control unit 76 and the monitor display unit 56 are applications installed in the PC 50, for example. The monitor display means 56 can be applied not only to the die casting apparatus of this embodiment but also to an injection molding apparatus (molding apparatus) for resin. The control unit 76 is connected to the mold internal information measurement sensor 48, the driver 52, the open detection switch 38, the shutoff detection switch 40, the inlet sensor 42, and the outlet sensor 44 through an interface (not shown) attached to the PC 50. ing.

  When the physical quantity information is input from the mold internal information measurement sensor 48, the control unit 76 associates the time information at the time of input with the physical quantity information and outputs it to the physical quantity information display unit 58. The mold internal information measuring sensor 48 can continuously measure the physical quantity in the time direction, but the control unit 76 converts the physical quantity into discrete digital data for the time direction and the magnitude of the physical quantity, and displays the physical quantity information display unit. 58. Note that the mold internal information measurement sensor 48 may generate digital data from the beginning without going through the control unit 76 and output the digital data to the physical quantity information display unit 58.

  When the first detection signal is input from the inlet sensor 42, the control unit 76 associates the time information when the first detection signal is input with it to generate filling start information and outputs it to the monitor display unit 56. Then, when the second detection signal is input from the outlet sensor 44, the time information when the second detection signal is input is associated with this to generate filling end information and output it to the monitor display means 56.

  Strictly speaking, the “filling start time” is the time when the molten metal 22 starts to enter the cavity 18 beyond the gate 24, and the “filling completion time” is the time when the molten metal 22 completely fills the cavity 18. It is the time of the moment. On the other hand, the inlet sensor 42 is not arranged at the inlet (gate 24) of the cavity 18 but is arranged adjacent to the cavity 18 outside the cavity 18 (runner 26). Similarly, the outlet sensor 44 is not disposed at the outlet of the cavity 18 (inlet of the gas vent path 32), and is disposed adjacent to the cavity 18 outside the cavity 18 (gas vent path 32).

  Therefore, in this embodiment, the “filling start information” is information on the time when the first detection signal arrives at the control unit 76 after the inlet sensor 42 detects the molten metal 22, and the molten metal 22 enters the cavity 18. This refers to “deemed filling start information” that is included as time information at the moment of starting entry. Similarly, the “filling completion information” is the time information when the second detection signal arrives at the control unit 76 after the outlet sensor 44 detects the molten metal 22, and the molten metal 22 has completely filled the cavity 18. This means “deemed filling end information” as information of the instantaneous time. As a result, “melt filling time” described later also includes information on the difference between time information related to “deemed filling end information” and time information related to “deemed filling start information”. Will point to.

  However, since the difference between the strict meaning of “filling start (end) time” and the time related to “deemed filling start (end) information” is very small, the “filling start (end) information of this embodiment” "Having the information of" filling start (end) time "in the above-described strict sense, there is no practical problem, and" melt filling time "can be handled in the same manner.

  The control unit 76 outputs a drive signal for driving the driver 52 as will be described later, but outputs output information indicating the time when the drive signal is output to the monitor display unit 56. And when the interruption | blocking detection signal is input from the interruption | blocking detection switch 40, the control part 76 relates the information of the time when the interruption | blocking detection signal was input to this, and outputs interruption | blocking detection information to the monitor display means 56. FIG.

  Note that the control unit 76 adds, for example, 2-bit binary data that can be distinguished from each other to each information in order to identify filling start information, filling end information, output information, and shut-off detection information from each other. 60, the background color display unit 62 can identify these pieces of information. The control unit 76 is provided with a storage unit (not shown) that stores filling start information, filling end information, output information, and shutoff detection information, and monitors these information stored in the storage unit by an external operation. You may enable it to output to the display means 56. FIG.

  The physical quantity information display unit 58 displays physical quantity information representing at least one of the gas pressure in the cavity 18 of the mold 12, the pressure of the molten metal 22, and the temperature of the molten metal 22 on the monitor 54 using the coordinates in the time direction ( Output). The physical quantity information display unit 58 converts a coordinate axis of time as a horizontal axis, a coordinate axis indicating the size of various physical quantities as a vertical axis, and a curve (graph) related to physical quantity information into position information on the monitor 54. Can be displayed as an image.

  The cursor display unit 60 is a monitor that extends filling start information (T1, FIG. 1) and filling end information (T2, FIG. 1) of the molten metal 22 in the cavity 18 along coordinates orthogonal to the coordinates, and is represented by physical quantity information. The first cursor 64 and the first cursor 66 intersecting the curve on 54 are converted into position information on the monitor 54 corresponding to the coordinates in the time direction and displayed (output). The cursor display unit 60 also outputs output information (T3, FIG. 1) indicating that a drive signal for operating the valve body 34 that blocks the gas vent path 32 is output, and the gas vent path 32 of the valve body 34. The block 54 detection information (T4, FIG. 1) indicating that the block has been detected is used as a second cursor 68 (second partition line) and a second cursor 70 (second partition line) corresponding to the coordinates. The information is converted into information on the upper position and displayed (output) on the monitor 54 in correspondence with the coordinate in the time direction.

  In order to facilitate identification, the cursor display unit 60 can also display (output) the color information of each cursor (partition line) by changing it to color information different from the color information of the curve and coordinate axes related to the physical quantity information. . Further, as described above, the filling start information, filling end information, output information, and shut-off detection information can be distinguished from each other, so that different color information can be set for each cursor.

  The background color display unit 62 identifies the first region 72 (FIG. 1) sandwiched between the first cursor 64 and the first cursor 66 on the monitor 54 by filling start information and filling end information, and information on the background color. Is changed to information that becomes a color different from the background color on the monitor 54 other than the first area 72 and displayed (output) on the monitor 54 in accordance with the coordinates in the time direction. The background color display unit 62 identifies the second area 68 (FIG. 1) sandwiched between the second cursor 68 and the second cursor 70 on the monitor 54 by the output information and the block information, and displays the background color information. The information is changed to information different from the background color on the monitor 54 other than the second area 74 and is displayed (output) on the monitor 54 corresponding to the coordinate in the time direction.

  The background color display unit 62 can change the color information of the background color of the entire area of the monitor 54 (information on all positions on the monitor 54), but as described above, filling start information, filling end information, and output information The blocking detection information can be distinguished from each other. Therefore, the first region is changed from the entire region of the monitor 54 by using the horizontal position information on the monitor 54 corresponding to the filling start information and the horizontal position information on the monitor 54 corresponding to the filling end information. 72 can be extracted. Thereby, the color information of the first area 72 can be changed to color information different from the other areas. Similarly, using the information on the position in the horizontal axis direction on the monitor 54 corresponding to the output information and the information on the position in the horizontal axis direction on the monitor 54 corresponding to the shutoff detection information, the entire area of the monitor 54 is changed to the second area. 74 can be extracted.

  With the above configuration, the background color of the portion sandwiched between the first cursor 64 and the first cursor 66 and the portion sandwiched between the second cursor 68 and the second cursor 70 are different from the background colors of the other portions. . Therefore, in the physical quantity information curve, the portion sandwiched between the first cursors 64 and 66 and the portion sandwiched between the second cursors 68 and 70 can be easily seen on the screen, thereby improving work efficiency. Can do. Further, the relationship between the curve of the physical quantity information and the first cursors 64 and 66 and the second cursors 68 and 70 can be confirmed in real time.

Next, control of the die casting apparatus 10 of this embodiment is demonstrated.
The controller 76 controls the valve body 34 so as to block the gas vent path 32 at the same time as the molten metal 22 is filled in the cavity 18. As described above, the inlet sensor 42, the outlet sensor 44, and the driver 52. Are electrically connected to the shutoff detection switch 40.

  By the way, even if the control unit 76 outputs a drive signal to the driver 52, there is an operation delay time until the valve body 34 actually shuts off the gas vent path 32. Therefore, if the control unit 76 outputs a drive signal after the molten metal 22 is detected by the outlet sensor 44, the valve body 34 will not be able to shut off the gas vent path 32 in time, and the molten metal 22 will overflow from the cavity 18. Become.

  Therefore, a timer (not shown) is built in the controller 76, and the timer counts up when the first detection signal (filling start information, T1) is input from the inlet sensor 42. Further, the control unit 76 is attached with a drive count value for taking a waiting time from when the first detection signal from the inlet sensor 42 is input until the drive signal (output information, T3) is output to the driver 52. Is stored in a memory (not shown). The control unit 76 outputs a drive signal to the driver 52 when the count value matches the drive count value. By calculating this drive count value as a time obtained by subtracting the operation delay time (T4-T3) from the molten metal filling time (T2-T1), the gas vent passage 32 is valved simultaneously with the filling of the molten metal 22 into the cavity 18. It can be blocked by the body 34. However, in practice, there may be a time shift every time die casting is performed due to various factors. Therefore, the control unit 76 includes a calculation unit 78 and a feedback control unit 80.

  The calculation unit 78 uses the first detection signal (filling start information, T1) input from the inlet sensor 42 and the second detection signal (filling end information, T2) input from the outlet sensor 44 by the first die casting. The molten metal filling time (T2-T1) in the cavity 18 is calculated from the time difference and stored in the memory. Further, the calculation unit 78 outputs an operation delay time (until a cutoff signal (shutoff information, T4) is input from the cutoff detection switch 40 after the control unit 76 outputs a drive signal (output information, T3) to the driver 52. The initial value of T4-T3) is calculated and stored in the memory. Furthermore, the calculation part 78 calculates the initial value of the drive count value from the difference between the molten metal detection time and the operation delay time, and stores it in the memory.

  The feedback control unit 80 determines a temporal difference (T2) between the cutoff signal (filling end information, T4) input from the cutoff detection switch 40 and the second detection signal (filling end information, T2) input from the outlet sensor 44. -T4) is calculated, and this difference is added to the drive count value stored in the memory.

  The calculation unit 78 and the feedback control unit 80 also update the information regarding the above-described time even in the second die casting. By including the calculation unit 78 and the feedback control unit 80 as described above, the control unit 76 can block the gas vent path 32 by the valve body 34 almost simultaneously with the molten metal 22 filling the cavity 18. Further, even when die casting is repeatedly performed, the drive count value is updated each time, and the cutoff signal (shutoff information, T4) input from the cutoff detection switch 40 and the second detection signal (filling) input from the outlet sensor 44 are filled. The time difference (T2−T4) of the end information, T2) can be minimized.

  These pieces of information are displayed in time series on the monitor 54, and it is possible to confirm whether or not the control is actually performed satisfactorily. That is, if the control is good, the cursor 66 on the right side of the first area 72 and the cursor 70 on the right side of the second area 74 are displayed so as to overlap each other (or with a small shift in the horizontal axis direction). (See FIG. 1).

  FIG. 4 shows a cross-sectional view of an attachment form of the molten metal detection sensor of the present embodiment, FIG. 5 shows an exploded cross sectional view of the molten metal detection sensor, and FIG. 6 shows an attachment hole in which the molten metal detection sensor of the present embodiment is attached. FIG. The inlet sensor 42 and the outlet sensor 44 of this embodiment are the molten metal detection sensor 82 shown in FIGS. The molten metal detection sensor 82 has a recess 92 (FIG. 5) with an opening 90 (FIG. 5) directed toward the cavity 18, and a holder 88 mounted on the mold 12 and electrically insulated from the holder 88. In this state, the entire outer shape is formed by the electrode rod 96 that is accommodated in the recess 92 and passes through the bottom of the recess 92 and is exposed to the outside of the holder 88. Both the holder 88 and the electrode rod 96 are made of metal.

  The holder 88 having a cylindrical outer shape is exposed at the wall surface 122 of the cavity (gate 24, detection cavity 46) inside the mold 12 where the opening 90 of the recess 92 is formed. The electrode rod 96 is a cylindrical member, and is disposed in a state of penetrating the holder 88 by being inserted into a through hole 94 (FIG. 5) formed at a position to be the bottom of the concave portion 92 of the holder 88. The holder 88 and the electrode rod 96 are arranged so as to be concentric with each other. However, since the inner diameter of the through hole 94 is larger than the diameter of the electrode rod 96, the electrode rod 96 does not contact the holder 88.

  One end portion of the electrode rod 96 in the longitudinal direction is exposed on the wall surface 122, and a flange portion 98 having a diameter larger than that of the other portion is provided in that portion. On the other hand, the opposite side of the electrode rod 96 in the longitudinal direction is a male threaded portion 100, and further at the tip thereof is a lead wire 114 (see FIG. 2) connected to the PC 50 and an insulator for protecting the lead wire 114. The protective tube 116 is attached.

  In the recess 92 of the holder 88, an insulator 102 made of an insulator such as ceramic is disposed so as to fill the recess 92. The insulator 102 has an external shape that follows the inner wall of the recess 92, and has an insertion hole 104 (FIG. 5) through which the electrode rod 96 is inserted and a counterbore 106 (FIG. 5) that houses the flange portion 98. As shown in FIG. 4, in this embodiment, the end surface on the wall surface 122 side of the holder 88, the end surface on the wall surface 122 side of the insulator 102, and the end surface on the wall surface 122 side of the flange portion 98 are flush with the wall surface 122. Are arranged to form.

  On the other hand, a cylindrical insulator 108 and a washer 110 are inserted into the male threaded portion 100 of the electrode rod 96, and a nut 112 and a nut 118 are screwed together. The lever 102, the holder 88 (bottom), the lever 108, and the washer 110 that are in contact with each other are fastened to the flange portion 98, the nut 112, and the nut 118, and are fixed to the holder 88. The molten metal detection sensor 82 of the present embodiment has a shape in which the holder 88, the electrode rod 96, and the lead wire 114 are concentric and extend in one direction. The lead wire 114 and the protective tube 116 are inserted into the insertion hole 104 and the through hole 94, and are inserted into the insertion hole through which the male screw portion 100 is inserted or screwed in the lever 108, the washer 110, the nut 112, and the nut 118. Is done.

  In order to mount the molten metal detection sensor 82, a mounting hole 120 is formed in the fixed mold 14 (or the movable mold 16). The mounting hole 120 has an opening 124 (FIG. 6) in the wall surface 122 and is formed in a straight line and penetrates to the outside of the fixed mold 14 (see FIG. 2). The mounting hole 120 has an inner diameter that follows the outer shape of the holder 88 at a depth corresponding to the length of the holder 88 from the opening 124, and has an inner diameter that is smaller than the outer shape of the holder 88 beyond that. .

  The molten metal detection sensor 82 may be attached by assembling the molten metal detection sensor 82, inserting the lead wire 114 through the opening 124, inserting the molten metal detection sensor 82 into the mounting hole 120, and fitting the holder 88 into the mounting hole 120. . If the molten metal detection sensor does not have a shape that extends in one direction as in the past, halve the fixed mold, and insert the molten metal detection sensor into the recessed part of the fixed mold that is exposed by half. It was necessary to perform work to join the molds together. However, in the present embodiment, it is not necessary to halve the fixed mold 14, and it is only necessary to form a straight mounting hole 120 and fit the molten metal detection sensor 82 into the mounting hole 120, so that the mounting work is easy. Can be done.

  When the molten metal detection sensor 82 of this embodiment is mounted in the mounting hole 120, the holder 88 is electrically connected to the lead wire 126 via the fixed mold 14. When the molten metal 22 simultaneously contacts the electrode rod 96 and the holder 88, the electrode rod 96 and the holder 88 are short-circuited. Thereby, since the lead wire 114 becomes a short circuit potential, this short circuit potential can be used as the first detection signal of the inlet sensor 42 and the second detection signal of the outlet sensor 44.

  In this embodiment, the physical quantity information display unit 58 is a continuous information display unit that displays continuous information (physical quantity information) continuous in time on the monitor 54 using coordinates in the time direction. The filling start information, filling end information, and the like are trigger information input to the cursor display unit 60 while the continuous information display unit (physical quantity information display unit 58) displays the continuous information (physical quantity information). . Therefore, the cursor display unit 60 sets the trigger information to the coordinate in the time direction as a partition line extending along the coordinate orthogonal to the coordinate in the time direction and intersecting the curve on the monitor 54 represented by the continuous information (physical quantity information). Correspondingly, it is displayed on the monitor 54. As a result, the background color display unit 62 identifies the position of the cursor on the monitor 54 by the trigger information. The background color display unit 62 changes the background color information to information different from each other with the partition line as a boundary. It is displayed on the monitor 54 corresponding to the direction coordinates. With the above configuration, since the background color of the monitor 54 on which continuous information (physical quantity information) is displayed can be changed with the trigger information (filling start information, filling end information, etc.) as a boundary, the relationship between the continuous information and the trigger information Can be easily seen on the monitor 54.

  Monitor display means that can easily visually check the relationship between the temporal transition of physical quantities such as gas pressure in the cavity, molten metal pressure and temperature, and the filling start time and filling end time, and a molding apparatus using the same It can be used as a monitor display method.

10 ......... Die-casting device, 12 ......... Mold, 14 ......... Fixed die, 16 ...... Moveable die, 18 ......... Cavity, 20 ...... Molute injection device, 22 ...... Mold, 24 ......... Gate, 26 ......... Runner, 28 ......... Sleeve, 30 ......... Plunger, 32 ......... Degassing passage, 34 ......... Valve element, 36 ......... Drive means, 38 ......... Open detection switch, 40 ......... Detection switch, 42 ......... Inlet sensor, 44 ......... Exit sensor, 46 ......... Detection cavity, 48 ......... Mold internal information measuring sensor, 50 ......... PC, 52 ......... Driver, 54 ......... Monitor, 56 ......... Monitor display means, 58 ......... Physical quantity information display section, 60 ......... Cursor display section, 62 ......... Background color display section, 64 ......... 1st cursor, 66 ......... 1st cursor, 68 ... ... second cursor, 70 ......... second cursor, 72 ......... first region, 74 ......... second region, 76 ......... control unit, 78 ......... calculation unit, 80 ......... feedback control unit , 82 ......... Molten metal detection sensor, 88 ......... Holder, 90 ... ... Opening, 92 ... ... Recess, 94 ... ... Through hole, 96 ... ... Electrode rod, 98 ... ... Flange, 100 ......... Male thread part, 102 ......... Insulator, 104 ......... Through hole, 106 ......... Counterbore, 108 ......... Insulator, 110 ......... Washer, 112 ......... Nut, 114 ......... Lead wire 116 ......... Protection tube, 118 ......... Nut, 120 ......... Mounting hole, 122 ......... Wall surface, 124 ......... Opening, 126 ......... Lead wire.

Claims (8)

A continuous information display unit that displays continuous information in time on the monitor using coordinates in the time direction;
A partition line that extends the trigger information input while the continuous information display unit displays the continuous information along a coordinate orthogonal to the coordinate and intersects the curve on the monitor represented by the continuous information A cursor display unit for displaying on the monitor corresponding to the coordinates,
A monitor display means, comprising: a background color display unit configured to display a background color on the monitor with the partition line as a boundary. A physical quantity information display unit for displaying information on a physical quantity representing at least one of gas pressure, molten metal pressure, molten metal temperature in a mold cavity on a monitor using coordinates in a time direction;
The filling start information and filling end information of the molten metal in the cavity correspond to the coordinates as first partition lines that extend along the coordinates orthogonal to the coordinates and intersect the curve on the monitor represented by the physical quantity information. A cursor display section to be displayed on the monitor,
A background color display unit configured to display a background color of the first region sandwiched between the first partition lines on the monitor different from a background color of the region other than the first region on the monitor; Monitor display means characterized by the above. The cursor display section
Output information indicating that a drive signal for operating a valve body that shuts off the gas vent path of the cavity is output, and shut-off detection information that indicates that the shut-off of the gas vent path of the valve body is detected, Each of them is displayed on the monitor as a second dividing line corresponding to the coordinates,
The background color display section
3. The monitor according to claim 2, wherein a background color of a second area sandwiched between the second partition lines on the monitor is displayed differently from an area other than the second area on the monitor. Display means. A molding apparatus comprising the monitor display means according to claim 2,
A physical quantity sensor that measures the physical quantity and outputs information on the physical quantity;
An inlet sensor that detects the molten metal flowing into the cavity gate and outputs a first detection signal;
An outlet sensor that detects the molten metal flowing into the inlet of the degassing passage of the cavity and outputs a second detection signal is attached to the mold,
The time when the first detection signal and the second detection signal are input, the filling start information is generated based on the time information when the first detection signal is input, and the second detection signal is input The molding apparatus is provided with a control unit that generates the filling end information based on the information and outputs the information to the monitor display unit. A molding apparatus comprising the monitor display means according to claim 3,
A physical quantity sensor that detects the physical quantity and outputs information on the physical quantity;
An inlet sensor that detects the molten metal flowing into the cavity gate and outputs a first detection signal;
An outlet sensor that detects the molten metal flowing into the inlet of the gas vent passage of the cavity and outputs a second detection signal;
A shutoff detection switch that detects shutoff of the gas vent passage of the valve body and outputs a shutoff detection signal, is mounted on the mold,
The output information is output to the monitor display means, and the first detection signal, the second detection signal, and the cutoff detection signal are input, and the filling is performed according to time information when the first detection signal is input. Generating start information, generating the filling end information based on time information when the second detection signal is input, and generating the cutoff detection information based on time information when the cutoff detection signal is input Each of the molding apparatuses is provided with a control unit for outputting to the monitor display means. The inlet sensor and the outlet sensor are
A holder having a recess with an opening directed toward the cavity, and mounted in the mold; and being accommodated in the recess while being electrically insulated from the holder, and penetrating through the bottom of the recess. An electrode bar exposed to the outside of the holder, and the molten metal can be detected by an electrical short circuit when the molten metal contacts the holder and the electrode bar at the same time,
The molding apparatus according to claim 4, wherein a lead wire extends from an end portion exposed from the holder of the electrode rod. Display continuous information on the monitor using temporal coordinates,
Trigger information input while displaying the continuous information corresponds to the coordinates as a partition line extending along a coordinate orthogonal to the coordinates and intersecting a curve on the monitor represented by the continuous information. Displayed on the monitor,
A monitor display method, wherein the background colors on the monitor are displayed differently with the partition line as a boundary. Information on the physical quantity representing at least one of the gas pressure, melt pressure, and melt temperature in the mold cavity is displayed on the monitor using the coordinates in the time direction.
The filling start information and filling end information of the molten metal in the cavity correspond to the coordinates as first partition lines that extend along the coordinates orthogonal to the coordinates and intersect the curve on the monitor represented by the physical quantity information. To display on the monitor,
A monitor display method, wherein a background color of a first area sandwiched between the first partition lines on the monitor is displayed differently from a background color of an area other than the first area on the monitor.

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