JP4681569B2 - Data display method of molding machine - Google Patents

Description

  The present invention relates to a data display method for a molding machine suitable for use in displaying a trend graph on a display by sequentially plotting monitor data along a time axis.

  Generally, in an injection molding machine, monitor data related to predetermined monitor items (injection filling time, VP switching position, injection end position, plasticizing time, etc.) related to the operation state for each shot is detected, and the detected monitor data is detected. Is displayed in real time as a trend graph on the display of the molding machine controller, and the quality of the molded product is judged and the fluctuation of the quality value due to changes over time is visually monitored and the molding state is judged. It can be used as a material.

Conventionally, as a method for monitoring such monitor data, an injection molding machine monitoring method disclosed in Patent Document 1 is known. This monitoring method includes a control panel in the injection molding machine main body, and the control panel includes a control device for controlling the injection molding machine main body, a data input unit, a display, and a storage device. Is a monitoring method of an injection molding machine in which detection values from various sensors provided in each part of the injection molding machine main body are input as performance data every cycle, and on the display according to instructions from the data input unit In addition to displaying the setting screen, the performance data sent every cycle on the setting screen is sampled for the actual data for one cycle at a set time interval as the first condition. Save and display on the display, or, as a second condition, sample the performance data for one cycle at the set cycle interval and save and display in the storage device In addition, even if either the first condition or the second condition is set as the third condition, it is set if a defect is detected. Even if it is not the sampling timing at the time interval or the set cycle interval, the setting to sample the actual data of the defect detection cycle, save it in the storage device and display it on the display, on the setting screen according to the instruction from the data input unit It is possible.
Japanese Patent No. 3784004

  However, the above-described conventional monitoring method of the injection molding machine (data display method of the molding machine) has the following problems.

  First, the actual data at the time of mass production is not logged every cycle, but the actual data is sampled at an arbitrary time interval or cycle interval from the cycle (shot) instructed by the operator. Even if it is possible to grasp the rough transition of the actual data to some extent, basically, since a large amount of actual data is displayed in a thinned state, it is possible to grasp the sudden failure or the change (state) before and after it. For example, it is impossible to grasp the details sufficiently, and it is impossible to monitor accurately and reliably.

  Secondly, as long as the actual data is monitored, the sampling interval for the actual data cannot be set so long, and there is a limit to reducing the capacity of the storage device used for display processing and the like. Therefore, it is not possible to realize a sufficiently small capacity for the storage device, and there is a limit to cost reduction with respect to component costs.

  An object of the present invention is to provide a data display method for a molding machine that solves the problems existing in the background art.

  In order to solve the above-described problem, the data display method of the molding machine 1 according to the present invention uses the X axis as the time axis and the Y axis as the size of the monitor data Di. By sequentially plotting the data Di ... along the X-axis, when the trend graph T ... is displayed on the display 2, the monitor data Di ... is sequentially divided every predetermined number of data N, and at least each of the divided groups G Are displayed on the Y axis at the plot positions P1, P2,... On the X axis, and the grouped groups G are sequentially displayed along the X axis. It is characterized by that.

  In this case, according to a preferred aspect of the invention, the data stack 3 for writing the monitor data Di ... has a storage capacity capable of displaying one monitor data Di on the Y axis and displaying the maximum number of plots M on the X axis. Can be selected. For the data stack 3, a FIFO (first in first out) 3f can be used. Further, the number N of data in each group G to be divided can be arbitrarily set by the point number setting key 4. On the other hand, unless the trend graph T is reset by the display reset key 5, the display of the monitor data Di can be maintained. In the trend graph T ..., the center line Lc ... with respect to the Y axis can be displayed along the X axis.

  According to the data display method of the molding machine 1 according to the present invention by such a method, the following remarkable effects can be obtained.

  (1) A plurality of monitor data Di... In each divided group G... Are displayed on the Y axis at the X axis plot positions P1, P2. Accordingly, all the monitor data Di can be displayed without thinning out the monitor data Di. Accordingly, it is possible to easily and surely grasp a sudden failure and a change (state) before and after the failure, and it is possible to sufficiently monitor details.

  (2) According to a preferred embodiment, the data stack 3 for writing the monitor data Di ... is selected as a storage capacity that displays one monitor data Di on the Y axis and can display the maximum number of plots M on the X axis. For example, it is possible to realize a sufficiently small capacity of the data stack 3 and to contribute to cost reduction with respect to component costs.

  (3) If the number of data N in each group G to be classified can be arbitrarily set by the point number setting key 4 according to a preferred mode, the operator can operate the molded product to be molded, the operating state of the molding machine 1, etc. The optimum number of data N can be set corresponding to

  (4) According to a preferred embodiment, the trend graph T... Is not affected by the writing state of the data stack 3 if the display of the monitor data Di. The monitor data Di can be reliably displayed up to the maximum plot number M of the trend graph T.

  (5) By displaying the center line Lc... Relative to the Y axis along the X axis on the trend graph T... According to a preferred embodiment, monitoring and determination can be easily performed and the trend graph T. Can also contribute to the visibility.

  Next, the best embodiment according to the present invention will be given and described in detail with reference to the drawings.

  First, the configuration of a molding machine (injection molding machine) 1 that can implement the data display method according to the present embodiment will be described with reference to FIGS. 3 and 4.

  In FIG. 3, reference numeral 1 shown by an imaginary line is an injection molding machine, which includes a machine base 1b, and an injection device 1i and a mold clamping device 1c installed on the machine base 1b. The injection device 1 i includes a heating cylinder 21, an injection nozzle that does not appear in the drawing at the front end of the heating cylinder 21, and a hopper 22 that supplies material to the rear of the heating cylinder 21. On the other hand, the mold clamping device 1c includes a mold 23 composed of a movable mold and a fixed mold. Further, a side panel 24 is erected on the machine base 1b, and a display 2 using a color liquid crystal display or the like is disposed on the side panel 24. As shown in FIG. 4, the display 2 is provided with a touch panel 2t, and the display 2 including the touch panel 2t is connected to a controller main body 30m built in the machine base 1b.

  FIG. 4 shows a block configuration diagram of the molding machine controller 30. Reference numeral 31 denotes a CPU, and a chip set 33 is connected to the CPU 31 via an internal bus 32. A bus line 34 using a local bus such as a PCI bus is connected to the chip set 33 to constitute an HMI (Human Machine Interface) control system. For this purpose, the bus line 34 is connected to an internal memory 35 such as a RAM and a ROM for causing the molding machine controller 30 to function, and the display 2 and the touch panel 2t described above are connected via a display interface 36. A drive unit 39 for reading from and writing to a storage medium 38 such as a memory card is connected via an interface 37.

  On the other hand, a bus line 40 similar to the bus line 34 is connected to the chip set 33 to constitute a PLC (programmable logic controller) control system. For this reason, the monitor data (switching data, etc.) Di ... obtained from the switch group 41 including various switches, relays, etc. are given to the bus line 40 to the CPU 31, and the control command data Do ... The input / output interface 42 to be provided is connected. Further, the monitor data (detection signals) Di... Obtained from the sensor group 43 including various sensors are converted from analog to digital and applied to the CPU 31, and the control signal Do. The input / output interface 44 provided to the corresponding actuator is connected. Thus, a predetermined feedback control system and an open loop control system are configured.

  Therefore, the internal memory 35 stores the PLC program and the HMI program and various processing programs. The PLC program is software for realizing the sequence operation of various processes in the injection molding machine 1 and the monitoring of the injection molding machine 1, and the HMI program is the setting and display of operation parameters of the injection molding machine 1 and injection. This is software for realizing display of operation monitoring data of the molding machine 1 and the like. These software are constructed as a unique architecture of the injection molding machine 1 on which the molding machine controller 30 is mounted, and in particular, can execute processing related to the data display method according to the present embodiment.

  Further, the data stack 3 for writing the monitor data Di... Described above is connected to the bus line 34. The data stack 3 uses a FIFO 3f that performs writing by a first-in first-out method. In this case, the storage capacity of the FIFO 3f can be set (selected) in relation to a later-described trend graph T ... displayed on the display 2. That is, a storage capacity capable of plotting one monitor data Di on the Y axis in an arbitrary trend graph T and displaying the maximum number of plots M on the X axis can be selected. In other words, even when such a storage capacity is selected, it means that the data display method according to the present embodiment can be effectively implemented and a sufficient amount of data can be displayed. In the exemplary trend graph T, the maximum number of plots M is “500”. The actual number of plots displayed is “250”, and the remaining number of plots “250” can be scroll-displayed by scroll keys 55u and 55d described later. Thus, if the data stack 3 (FIFO 3f) for writing the monitor data Di ... is selected as a storage capacity that displays one monitor data Di on the Y axis and can display the maximum number of plots M on the X axis. There is an advantage that the data stack 3 (FIFO 3f) can be sufficiently reduced in capacity and can contribute to cost reduction for the parts cost.

  On the other hand, as shown in FIG. 2, a plurality of screen switching keys K1, K2, K3... Provided for each screen item for switching various screens are displayed on the display 2 as shown in FIG. The screen switching keys K1... Are ranked in consideration of the frequency of use. In the upper part, the mold opening / closing screen switching key K1, the ejector screen switching key K2, the injection / weighing screen switching key K3, and the temperature screen switching key K4. The first group Au related to the setting of the operating conditions of the molding machine having the monitor screen switching key K5, the main condition screen switching key K6, and the condition switching screen switching key K7 is arranged in a horizontal row, and in the lower part, A second group Ad having a setup screen switching key K8, a process monitoring screen switching key K9, a production information screen switching key K10, a waveform screen switching key K11, a history screen switching key K12, and a support screen switching key K13 is arranged in a horizontal row. To do. The second group Ad is in a state where the first layer is displayed, but can be switched to the screen switch key in the second layer by selecting (ON) the layer screen switch key Kc at the right end of the screen. .

  The monitor screen Vm is displayed on the display 2 by selecting (ON) the monitor screen switching key K5. This monitor screen Vm has a monitor item display section 51 on which a total of eight monitor items E, such as “injection filling time”, are displayed. The monitor item E of the monitor item display unit 51 can be changed to another monitor item. Monitor items E are “injection filling time”, “specified position passing time”, “injection start position”, “VP switching position”, “injection most advanced position”, “injection end position”, “VP”. There are a total of 23 items such as “switching pressure”, “injection most forward pressure”, “injection peak pressure”, “specified position pressure”, “section average injection pressure”, and “injection start pressure”.

  Each monitor item E has a reference value setting unit 52 and a monitoring width setting unit 53 for setting the quality of the molded product on the lower side, and an X axis (vertical direction) on the lower side. ) As the time axis and the Y axis (horizontal direction) as the size of the monitor data Di..., And sequentially plot the monitor data Di... Corresponding to each monitor item E. Has a trend graph display section 54 for displaying. As described above, in the exemplary trend graph T, the number of plot positions (rows) on the X axis (maximum plot number M) is “500”. Note that the actual number of plots displayed is “250”, and the remaining number of plots “250” is scroll-displayed by the scroll keys 55u and 55d. In each trend graph T ..., a center line Lc ... with respect to the Y axis is displayed along the X axis. Accordingly, there is an advantage that monitoring and determination can be easily performed and the trend graph T can be easily viewed.

  Furthermore, on the lower side of the trend graph display unit 54, as a key used in the data display method according to the present embodiment, the graph is plotted on the Y axis at the X axis plot position (row) of the trend graph T. It has a point number setting key 4 for setting the number of points (data number) N and a display reset key 5 for resetting the display of the monitor data Di ... in the trend graph T .... Thus, the operator can arbitrarily set the optimum number N of points to be plotted on the Y axis in correspondence with the molded product to be molded, the operation state of the injection molding machine 1 and the like by the point number setting key 4. Can do. In this case, the settable point number N is not particularly limited, and can be set to any number including “1”. Further, the display reset key 5 can display the monitor data Di... Up to the maximum number of plots M of the trend graph T... Not.

  Next, the data display method according to the present embodiment will be described according to the flowchart shown in FIG. 5 with reference to FIGS.

  First, the operator selects (ON) the monitor screen switching key K5 shown in FIG. 2 and displays the monitor screen Vm on the display 2. Then, the point number setting key 4 is selected (ON), and an arbitrary number of points (data number) N is set (step S1). FIG. 2 shows a case where “1” is set as the number N of points. In setting, the numeric keypad is displayed in a window by touching the point number setting key 4, so that an arbitrary numerical value can be set from the numeric keypad.

  On the other hand, when the production operation of the injection molding machine 1 is started, each monitor data Di ... corresponding to each monitor item E ... is detected from the switch group 41 and the sensor group 43 for each shot, and the detected monitor data Di is detected. Are input to the controller main body 30m (steps S2, S3, S4). Then, the inputted monitor data Di ... is written in the FIFO 3f (step S5). In this case, since the monitor data Di ... for each shot is sequentially written in the FIFO 3f, if the monitor data Di ... is written up to the maximum capacity of the FIFO 3f, the first monitor data Di is sequentially lost from the FIFO 3f by the first-in first-out method. (Steps S6 and S7). In the example, after “500” shots (molding) are performed, the first monitor data Di disappears sequentially.

  Further, the monitor data Di... Is given to the display interface 36 and is plotted and displayed on the corresponding trend graph T on the display 2 (step S8). In this case, since the set number of points is “1”, the Y axis at each plot position P1, P2, P3... Of the X axis of each trend graph T. Only one monitor data Di ... is sequentially displayed on the top. At this time, if the display reset key 5 is operated (ON) during the display, the monitor data Di ... being displayed can be cleared (steps S9, S10). Therefore, unless the display reset key 5 is operated (ON), the monitor data Di can be reliably displayed up to the maximum number of plots M of the trend graph T, and the write state of the FIFO 3f (data stack 3) is affected. Not receive.

  By the way, when the number N of points on the Y-axis is set to “1”, the number M of points displayed on the trend graph T is 500 shots. For example, if the shot cycle time is 10 seconds, the display time Is equivalent to 1 hour 24 minutes. However, if you want to monitor the effects of daily temperature changes, etc., this display time is too short. If you want to monitor cycle data even longer or monitor data Di ... This is a problem that cannot be ignored.

  For this reason, in the data display method according to the present embodiment, a plurality of monitor data Di... Can be plotted on the Y axis at the X axis plot position (row) of the trend graph T. Therefore, in this case, the operator can set the optimum number of points (number of data) N to be displayed corresponding to the molded product to be molded, the operation state of the injection molding machine 1, and the like. That is, the operator may select (ON) the point number setting key 4 and change it to an arbitrary point number (data number) N (steps S11 and S12). FIG. 1 shows a case where the number of points N is changed to “10”.

  As a result, in the FIFO 3f, the monitor data Di... Are sequentially written in the same manner as before the change. However, in the arbitrary trend graph T in the display 2, as shown by a solid line in FIG. “10” pieces of monitor data Di... Are sequentially displayed on the Y axis at the respective plot positions P1, P2, P3. That is, the monitor data Di to be input is sequentially divided by the number of data “10”, and “10” monitor data Di in each divided group G is overlapped on the Y axis of the corresponding plot position P1. Thereafter, the display process in which the next “10” pieces of monitor data Di... Are repeatedly displayed at the next corresponding plot positions P 2. In this case, the trend graph T can display monitor data Di... For 5000 (= 500 × 10) shots. Therefore, when the cycle time is 10 seconds, the display time is equivalent to 13 hours 54 minutes. In addition, the display after changing the number N of points may be changed from the time of the change without changing the display up to immediately before, or the display including the points already displayed may be changed. Good.

  Therefore, according to such a data display method according to the present embodiment, a plurality of monitor data Di in each divided group G is overlapped on the Y axis at each plot position P1, P2,. Since the divided groups G are sequentially displayed along the X axis, all the monitor data Di can be displayed without thinning out the monitor data Di. Accordingly, it is possible to easily and surely grasp a sudden failure and a change (state) before and after the failure, and it is possible to sufficiently monitor details.

  Although the best embodiment has been described in detail above, the present invention is not limited to such an embodiment, and the detailed configuration, method, quantity, numerical value, and the like do not depart from the spirit of the present invention. It can be changed, added, or deleted arbitrarily.

  For example, although the case where the FIFO 3f is used as the data stack 3 is shown, it can be replaced with various storage devices having similar functions. Moreover, although the case where the center line Lc ... with respect to the Y axis is displayed along the X axis is shown in the trend graph T ..., it is not always necessary to display the center line Lc .... Further, the X axis and the Y axis indicate a right angle relationship, and do not necessarily mean a direction. On the other hand, not only the display on the display 2 but also a mode of displaying on other display devices by communication is included. In addition, although the case where it applied to the injection molding machine 1 was illustrated, while being applicable similarly to various types of molding machines, such as an extrusion molding machine, it can apply widely also to various production machines similarly.

FIG. 5 is a display mode diagram of a monitor screen used for carrying out the data display method according to the best embodiment of the present invention; Another display mode diagram of the monitor screen used for carrying out the data display method, Schematic diagram of an injection molding machine used to implement the data display method and a display mounted on the injection molding machine, Block diagram of a molding machine controller provided in the injection molding machine, A flowchart showing a processing procedure related to the data display method,

Explanation of symbols

  1: molding machine (injection molding machine), 2: display, 3: data stack, 3f: FIFO (first in first out), 4: point number setting key, 5: display reset key, E ...: monitor item, Di ... : Monitor data, T ...: Trend graph, P1 ...: Plot position, Lc ...: Center line

Claims (6)

  Data display of a molding machine that displays a trend graph on the display by sequentially plotting monitor data related to a predetermined monitor item along the X axis, with the X axis as the time axis and the Y axis as the monitor data size In the method, the monitor data is sequentially divided into a predetermined number of data, and at least a plurality of monitor data in each divided group is displayed on the Y axis at each plot position of the X axis and is divided. A data display method for a molding machine, characterized in that each group is sequentially displayed along the X axis.   2. The molding machine according to claim 1, wherein the data stack for writing the monitor data selects a storage capacity capable of displaying one monitor data on the Y axis and displaying the maximum number of plots on the X axis. Data display method.   3. The data display method for a molding machine according to claim 2, wherein a FIFO (first in first out) is used for the data stack.   2. The data display method for a molding machine according to claim 1, wherein the number of data in each group to be classified can be arbitrarily set by a point number setting key.   2. The data display method for a molding machine according to claim 1, wherein the trend graph maintains the display of the monitor data unless the trend graph is reset by a display reset key.   3. The data display method for a molding machine according to claim 1, wherein a center line with respect to the Y axis is displayed along the X axis on the trend graph.

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