JP5572343B2 - Signal processing device for injection molding machine - Google Patents

Description

  The present invention relates to a signal processing apparatus capable of outputting a signal for operating peripheral devices of an injection molding machine.

  For example, in an electric injection molding machine, an injection molded product can be efficiently processed by repeating a series of cycles such as mold closing, injection, holding pressure, weighing, and mold opening in a predetermined order based on a sequence program incorporated in advance. It is configured to manufacture. In addition, peripheral devices such as various lamps, buzzers, conveyors, non-defective product sorting chutes, and the like may be attached to the injection molding machine as desired by the user. These peripheral devices are operated by various signals output during operation of the injection molding machine, for example.

  Since the sequence program relates to the basic operation of the injection molding machine, it is necessary to carefully cope with changes to the sequence program. When the peripheral device is changed or added on the user side, the sequence program may be changed for the peripheral device. In this case, it is necessary to carefully consider the sequence program over time. Also, a programming device that automatically generates a ladder program has been proposed so that the sequence program can be changed relatively easily, for example, as disclosed in Patent Document 1 below.

  Further, as disclosed in Patent Document 2 below, a signal processing apparatus that can output a signal for operating a peripheral device without changing a sequence program has also been proposed. The signal processing apparatus disclosed in Patent Document 2 is an output obtained from a logical product of a logical sum of several signals among a plurality of state signals repeated every molding cycle and a logical sum of state signals irrelevant to the molding cycle. Peripheral devices are activated when conditions are met based on the signal.

Japanese Patent Laid-Open No. 6-4111 JP 2007-140853 A

  When the sequence program itself is changed as in Patent Document 1, it is necessary to carefully scrutinize and review the sequence program over a long period of time so as not to affect the operation of the injection molding machine. . In general, the sequence program is changed not by the user but by the injection molding machine manufacturer. However, the operation requires a long time and the cost is considerably increased. Moreover, since the peripheral device takes various forms for the convenience of the user, it is not practical to rework the sequence program each time the peripheral device changes. Further, there is a problem that the injection molding machine cannot be used while the sequence program is changed.

  On the other hand, as in Patent Document 2, an output signal is obtained by a logical product of a signal input to a first OR column prepared in advance and a signal input to a second OR column. In some cases, the output signals obtained by the combination of the input signals are limited, so that it cannot cope with a wide variety of peripheral devices used by the user as needed. That is, it is difficult to obtain output signals rich in variations that can be used for peripheral devices that are required to operate under various conditions that cannot be predicted by the manufacturer of the injection molding machine. For this reason, it is necessary to change the sequence program depending on the peripheral device.

  Accordingly, an object of the present invention is to provide a signal processing apparatus capable of setting an output signal rich in variations necessary for operating various peripheral devices of an injection molding machine using an operation panel without changing a sequence program. It is to provide.

The present invention is a signal processing device having an operation panel connected to a control device of an injection molding machine, which individually displays items representing a plurality of logical operation expressions including IMP, XOR, NIMP, and NXOR and An arithmetic expression selection unit having an item representing an arithmetic expression as a switch function for selecting each logical operation expression, and a plurality of columns of operations in which the items of the logical expression selected by the arithmetic expression selection unit are input An item input field; a signal name selection unit that displays a plurality of types of signal names representing the state of the injection molding machine and has a switch function for selecting a desired signal name from these signal names; and the calculation item. A first signal input field that is provided for each input field and for which the signal name selected by the signal name selection unit is input, and is provided for each calculation item input field, and is selected by the signal name selection unit. Corresponds to the second signal input field in which the selected signal name is input, and each signal name input to the first signal input field and the second signal input field during operation of the injection molding machine Logical operation executing means for obtaining an output signal for the peripheral device of the injection molding machine by processing each signal based on the logical operation expression of the item input in the operation item input field. Yes.

  The signal name selection unit may include an I / O selection unit for directly inputting an I / O address in addition to the signal name representing the state of the injection molding machine.

  In a preferred embodiment of the present invention, the operation panel includes an operation timing selection unit capable of selecting an operation timing of the output signal obtained by a logical operation of the logical operation execution means, and the operation selected by the operation timing selection unit. An operation timing input field for inputting timing for each of the calculation item input fields, and outputting the output signal to the peripheral device in accordance with the operation timing.

  The operation panel may have a time input field for inputting the time value of the operation timing for each calculation item input field. Alternatively, the operation panel includes, for each of the calculation item input fields, an “execution mode” for outputting the output signal from the logical operation execution means to the peripheral device and a “display mode” for not outputting the output signal to the peripheral device. There may be provided an output selection field for switching between.

  According to the present invention, it is possible to obtain an output signal rich in variations that can satisfy the conditions necessary for operating various peripheral devices installed by the user using the injection molding machine as needed, The conditions for obtaining the output signal can be set flexibly through the operation panel using signal names that are easy for the user to understand, and there is no need to change the sequence program. For this reason, even when a peripheral device is added or changed, an operating condition is changed, etc., it is possible to cope with a relatively short time by an input operation performed by the user.

The side view of an injection molding machine provided with the signal processing device concerning one embodiment of the present invention. The block diagram which shows the control apparatus of the injection molding machine shown in FIG. 1, an operation panel, etc. FIG. The flowchart which shows the input procedure of the operation panel of the injection molding machine shown by FIG. The front view which shows the initial screen of the operation panel of the injection molding machine shown by FIG. The front view which shows one example of the option screen of the said operation panel. The front view which shows the window for arithmetic expression selection displayed on the said option screen. The front view which shows the signal name selection window displayed on the said option screen. The front view which shows the window for operation | movement timing selection displayed on the said option screen. (A)-(g) is a time chart which shows the relationship between the signal Y of the said operation timing, and an output signal, respectively. The front view which shows the window for time input displayed on the said option screen. The front view which shows the state which the input of the 1st input row | line of the said option screen was complete | finished. The front view which shows the state which the input of the 1st-5th input row | line of the said option screen was complete | finished.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows an electric injection molding machine 10. This injection molding machine 10 includes a control device 11 in which a computer program for controlling an injection molding operation is incorporated, a body 12 including a frame for housing the control device 11, an injection device 13 disposed on the body 12, and a mold clamping. A device 14 and an operation panel 15 are provided.

  The injection molding machine 10 is connected to a plurality of peripheral devices 20 a to 20 n that operate in association with the injection molding machine 10. The peripheral devices 20a to 20n include, for example, various display lamps, buzzers, conveyors, non-defective product sorting chutes, automatic die changers, and various types of equipment (users) employed by the user of the injection molding machine 10 as necessary. It is equipment and the kind is not limited. All of these are devices that operate according to the state of the injection molding machine 10.

  FIG. 2 is a block diagram including the control device 11. An operation panel 15, a nonvolatile PROM 30, a RAM 31 that functions as a work memory, and the like are connected to the control device 11. The PROM 30 incorporates a sequence program for operating the injection molding machine 10 in a predetermined sequence. The CPU of the control device 11 functions as a control calculation means, and based on the sequence program, signals related to injection molding such as the injection device 13, the mold clamping device 14 and the ejector mechanism (not shown) are output in a predetermined order. The injection molding cycle is repeated.

  Further, peripheral devices 20a to 20n are connected to the control device 11 via a terminal 40 which is an output destination. That is, the control device 11 outputs a signal for operating various devices for injection molding including the injection device 13 and the mold clamping device 14, and also operates the peripheral devices 20a to 20n as necessary. have. The control device 11, the operation panel 15, the RAM 31, and the like constitute a signal processing device according to the present invention.

  An example of the operation panel 15 is a touch panel. The touch panel serves as both a display device (display panel) and an input device, and is suitable as the operation panel 15 because it is easy to use even at the site where injection molding is performed. However, an operation panel in which an input device using a keyboard or a mouse and a display unit are separated may be used.

  FIG. 3 schematically shows an operation of inputting various data necessary for operating the peripheral devices 20a to 20n to the operation panel 15. Various data input from the operation panel 15 are stored in the RAM 31. 4 to 12 show examples of option screens on the operation panel 15.

  The flowchart of the input operation shown in FIG. 3 includes, in order from the top, an option selection step S1, a signal output screen selection step S2, a calculation item input step S3, a signal input step S4, and an operation timing selection step S5. It includes an output on / off selection step S6, a signal name input step S7, and the like.

  FIG. 4 schematically shows an initial screen (batch setting screen) 50 displayed on the operation panel 15 when the power of the injection molding machine 10 is turned on. An option selection icon 51 is displayed on a part of the initial screen 50.

  In the option selection step S1 shown in FIG. 3, when the option selection icon 51 in FIG. 4 is turned on, the screen is switched and a plurality of types of option selection tabs 55 (shown in FIG. 5) are displayed. A part of these option selection tabs 55 includes a signal output screen tab 55a.

  In the signal output screen selection step S2 shown in FIG. 3, when the signal output screen tab 55a of the option selection tabs 55 is turned on, the signal output option screen 60 of FIG. 5 is displayed. If an option selection tab 55 other than the signal output screen tab 55a is turned on, another option screen can be displayed. However, the explanation is omitted because it is not important for explaining the present invention.

  In the signal output option screen 60 shown in FIG. 5, a plurality of (for example, 8 columns) input columns 61 a to 61 h are displayed from the top to the bottom. The signal output option screen 60 has a plurality of groups, and by operating the group selection button 62, any one group can be selected and displayed. The first group signal output option screen 60 will be described as a representative.

  The input columns 61a to 61h displayed on the signal output option screen 60 shown in FIG. 5 are respectively from the left to the right, the calculation item input column 70, the first signal input column 71, and the second column. It has a signal input field 72, an operation timing input field 73, a time input field 74, an output selection field 75, and an output signal name display field 76.

  In the initial state, the logical operation item “A” is displayed in all of the operation item input fields 70, and the input box (box-shaped space) is displayed in the first signal input field 71. “Synchronous” is displayed in the operation timing input field 73, and “OFF” is displayed in the output selection field 75. In the output signal name display column 76, for example, “TEST1” to “TEST8” are displayed.

  In the calculation item input step S3 shown in FIG. 3, the calculation item input field 70 of the option screen 60 (FIG. 5) is turned on. When the calculation item input field 70 is turned on, as shown in FIG. 6, a calculation formula selection window 80, that is, a calculation formula selection section is displayed on a part of the screen 60. There are ten types of logical operation expressions displayed in this window 80: A, NOTA, AND, NAND, OR, NOR, IMP, NIMP, XOR, and XNOR. Of these logical arithmetic expressions, NOTA, NAND, NOR, NIMP, and XNOR are negative logical arithmetic expressions.

  The following table 1 shows the relationship between the on / off of the first signal A and the second signal B and the on / off of the signal Y obtained as a result of the logical operation in the ten types of logical operation expressions. Yes. In Table 1, “◯” indicates that the signal Y is turned on, and “x” indicates that the signal Y is turned off.

  When a desired logical operation expression related to the processing of signals A and B is selected in the operation expression selection window 80 of FIG. 6 and turned on, the logical operation expression is displayed in the operation item input field 70. This arithmetic expression selection window (arithmetic expression selection section) 80 has a switch function for selecting a logical arithmetic expression and inputting it to the arithmetic item input field 70.

  When the calculation item input to the calculation item input field 70 is other than “A” or “NOTA”, the input for each of the first signal input field 71 and the second signal input field 72 as shown in FIG. A box (box-shaped space) is displayed. When the calculation item input to the calculation item input field 70 is “A” or “NOTA”, only the first signal input field 71 is used to perform a logical operation. Is displayed, and the input box in the second signal input field 72 is not displayed.

  In the signal input step S4 shown in FIG. 3, when the input box in the first signal input field 71 is turned on, a signal name selection window 90, that is, a signal name selection section is displayed as shown in FIG. In this window 90, a plurality of types of signal names related to the state and operation of the injection molding machine are displayed so that a desired signal name can be selected. When a signal name displayed in the signal name selection window 90 is selected and turned on, the signal name is displayed in the first signal input field 71.

  The signal name selection window 90 (FIG. 7) is provided with an I / O selection unit 91 that can directly input an I / O address in addition to the signal name representing the state of the injection molding machine. By turning on the I / O selection unit 91, an I / O address can be directly designated on the screen. This window 90 has a plurality of screens (pages) so that many various signal names can be displayed, and by operating the operation buttons 92 and 93, the desired signals can be selected by sequentially switching pages. ing.

  After inputting a signal name in the first signal input field 71, the input box in the second signal input field 72 is turned on. When the signal name displayed in the signal name selection window 90 is selected and turned on, the signal name is displayed in the second signal input field 72. The signal name selection window 90 has a switch function for inputting the selected signal name into the signal input fields 71 and 72.

  Further, the operation timing of the output signal is set in the operation timing selection step S5 shown in FIG. That is, when the input box in the operation timing input field 73 is turned on, an operation timing selection window 100 is displayed as shown in FIG. This window 100 has a switching function as an operation timing selection unit, and displays seven types of operation timings (synchronization, on-delay, off-delay, time limit, continuation, intermittent, hold) described below.

  (A)-(g) of FIG. 9 has shown the relationship between the signal Y for every operation timing, and an output signal. In “synchronization” in (a), the output signal is turned on at the same timing as the signal Y. The “input delay” in (b) turns on the output signal with a delay of time t after the signal Y is turned on. In the case of “off delay” in (c), the output signal is turned off after time t since the signal Y is turned off. In the “time period” of (d), the output signal is turned on at the same time as the signal Y is turned on, but the output signal is turned off after time t.

  In “continuation” in FIG. 9E, the output signal is turned on at the same time as the signal Y is turned on, and the output signal is kept on until the time t elapses. In “intermittent” in (f), the output signal is repeatedly turned on at time t intervals while the signal Y is on. In “hold” in (g), when the signal Y is turned on, the output signal is turned on, and the output signal is kept on until the power is turned off.

  In the operation timing selection step S5 shown in FIG. 3, when a desired operation timing is selected from the operation timings displayed in the operation timing selection window 100 (FIG. 8) and turned on, the selected operation timing is selected. Is input to the operation timing input field 73. When the selected timing operation is other than “synchronization” and “hold”, an input box is displayed in the time input field 74 and a time input window 110 is displayed as shown in FIG. When time is input through this window 110, the time value (t) is displayed in the time input field 74.

  In the output on / off selection step S6 shown in FIG. 3, the output selection column 75 is selected to be “ON” or “OFF”. Although the initial state is “OFF”, “OFF” and “ON” are alternately switched every time the output selection field 75 is operated. When the output selection column 75 is switched to “ON”, the output selection column 75 is displayed in pink.

  When the output selection column 75 is “ON”, the output signal when the conditions of the first and second signals A and B are satisfied by the logical operation expression input to the input column 61a is used for the peripheral device. Output to the terminal 40. In other words, when the output selection column 75 is “ON”, the “execution mode” in which the output signal is output for the peripheral device is set.

  When the output selection column 75 is “OFF”, the output signal when the conditions of the first and second signals A and B are satisfied by the logical operation expression input to the input column 61a is the peripheral device. It is not outputted to the terminal 40 for use, but becomes a “display mode” in which only display is performed.

  In the signal name input step S7 shown in FIG. 3, when the output signal name display field 76 is turned on, a window (software keyboard) simulating a keyboard is displayed on a part of the screen 60, so that a desired output is obtained. A signal name can be entered. In the example of FIG. 11, the output selection column 75 is set to “ON”, and the output signal name display column 76 is set to “SIGNAL1”.

  When the output selection column 75 is in the “OFF” display mode, the output signal name display column 76 is switched to blue when the output signal is turned on by the logical operation of the input column 61a. When the output selection column 75 is in the execution mode “ON”, when the output signal is turned on by the logical operation of the input column 61a, the output signal name display column 76 changes to red. Is easily output to the terminal 40 for peripheral devices. In the example of FIG. 11, a signal is output to SIGNAL 1 with an input delay of 1.0 seconds when metering is completed during automatic operation.

  With the series of input operations described above, the input of the first input row 61a from the top is completed. The input columns 61b to 61h after the second (second column) from the top can also be input in the same manner as the first column. FIG. 12 shows an example of input to the input columns 61a to 61e up to the first to fifth columns. In this way, the calculation item input field 70, the first signal input field 71, and the second signal input field 72 are input using the option screen 60 of the operation panel 15, and further, the operation timing input field as required. 73, the time input column 74 is entered. Further, an input to the output selection field 75 and the output signal name display field 76 is made. The input data is sequentially input to a table (not shown) provided in the work memory of the RAM 31.

  When the injection molding machine 10 manufactures an injection molded product, a series of cycles such as mold closing, injection, holding pressure, weighing, mold opening, etc. are performed by the CPU of the control device 11 based on a sequence program incorporated in the PROM 30. Are repeated in a predetermined order. While the injection molding machine 10 is performing the injection operation, the control device 11 is configured to input each input row 61a input to the operation panel 15 based on a signal output from the control device 11 for each cycle of the injection molding machine 10. A logical operation expression of ~ 61h is executed. That is, while the injection molding machine 10 is in operation, the data input to the input columns 61a to 61h are sequentially processed, and the logical operation input to the calculation item input field 70 for each of the input columns 61a to 61h. Based on the equation, a logical operation of signals corresponding to the first signal input field 71 and the second signal input field 72 is performed.

  The output signal when the logical operation is satisfied is processed based on the data input to the operation timing input field 73 and the time input field 74 as necessary, and the output selection field 75 is “ON”. In this case, the output signal name display column 76 is switched to red, and the output signal is output to the peripheral devices 20a to 20n via the terminal 40, whereby a predetermined peripheral device can be operated. When the output selection column 75 is “OFF”, the output signal name display column 76 is blue, and only the display is made.

  As described above, the control device 11 according to the present embodiment calculates each signal corresponding to each signal name input to the first signal input field 71 and the second signal input field 72 during the operation of the injection molding machine 10. Processing is performed based on the logical operation expression input in the item input field 70, and functions as logical operation execution means for obtaining an output signal for the peripheral device.

  As described above, the injection molding machine 10 according to the present embodiment is configured so that peripheral devices such as various lamps, conveyors, chutes and the like are operated according to the operation of the injection molding machine 10 based on the input data set on the operation panel 15. The operation panel 15 can be operated by a signal output, and various output signals for operating peripheral devices can be arbitrarily selected using the operation panel 15 that can be operated by the user. Since the logic operation items that can be selected by the operation panel 15 include various negative logic expressions, output signals in various modes according to the purpose of the peripheral device can be obtained, and variations in the output signals are extremely large. It is colorful.

  For this reason, it is possible to respond to peripheral devices that require various outputs that are difficult to predict by the manufacturer of the injection molding machine without changing the sequence program, and it is possible to change or add peripheral devices or change operating conditions. It can respond when it occurs. Since it is not necessary to change the sequence program, it is possible to avoid the influence on the operation of the injection molding machine, and it is possible to deal with various peripheral devices depending on the user side.

  In practicing the present invention, specific configurations and arrangements of injection molding machines and peripheral devices, as well as specific modes of operation panel screens, calculation items displayed on the operation panel, signal names, operation timings, etc. It goes without saying that other items and the like can be variously modified and implemented without departing from the invention.

DESCRIPTION OF SYMBOLS 10 ... Injection molding machine 11 ... Control apparatus (logical operation execution means)
DESCRIPTION OF SYMBOLS 15 ... Operation panel 20a-20n ... Peripheral device 70 ... Calculation item input column 71 ... 1st signal input column 72 ... 2nd signal input column 73 ... Operation timing input column 74 ... Time input column 75 ... Output selection column 76 ... Output signal name display field 80 ... Calculation formula selection window (calculation formula selection section)
90 ... Signal name selection window (signal name selection section)
91 ... I / O selection part

Claims (6)

A signal processing device having an operation panel connected to a control device of an injection molding machine,
IMP, XOR, Nimp and NXOR display items representing multiple logical operation expression individually containing and arithmetic expression selecting section that the item representing these logical operation expression, a switching function for selecting the respective logical operation expression When,
A plurality of columns of calculation item input fields for inputting items of the logical calculation formula selected by the calculation formula selection unit;
A signal name selection unit that displays a plurality of types of signal names representing the state of the injection molding machine and has a switch function for selecting a desired signal name from these signal names;
A first signal input field provided for each of the calculation item input fields, in which a signal name selected by the signal name selection unit is input;
A second signal input field provided for each of the calculation item input fields, in which the signal name selected by the signal name selection unit is input;
The logic of items each signal inputted to the operand input field corresponding to each signal name entered in the first signal input column and the second signal input column during operation of the injection molding machine Logical operation executing means for obtaining an output signal for peripheral equipment of the injection molding machine by processing based on an arithmetic expression;
A signal processing apparatus for an injection molding machine.   2. The signal name selection unit includes an I / O selection unit for directly inputting an I / O address in addition to a signal name representing a state of the injection molding machine. Signal processing device.   The operation panel includes an operation timing selection unit capable of selecting an operation timing of the output signal obtained by a logical operation of the logical operation execution means, and the operation timing selected by the operation timing selection unit in the operation item input field. The signal processing apparatus according to claim 1, further comprising: an operation timing input field that is input every time, and outputting the output signal to the peripheral device according to the operation timing.   The signal processing apparatus according to claim 3, wherein the operation panel includes a time input field for inputting a time value of the operation timing for each calculation item input field.   The operation panel is an output for switching between an execution mode for outputting the output signal from the logical operation execution means to the peripheral device and a display mode for not outputting the output signal to the peripheral device for each operation item input field. 5. The signal processing apparatus according to claim 1, further comprising a selection field. The second signal input field is not displayed when an item of the logical expression selected by the arithmetic expression selection unit is an item in which a logical operation is established only in the first signal input field. Item 1. The signal processing device according to Item 1.

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