JPH0639889A - Apparatus for displaying molding information of injection molding machine - Google Patents

Abstract

PURPOSE:To make visual comparison of molding condition and various molding data possible and to set easily the optimum condition when the condition is determined. CONSTITUTION:Molding conditions tried in the past molding operations and molding data corresponding to each molding condition are stored in a mold file of a non-volatile memory 24 and data in the mold file is called independently from the molding condition of the non-volatile memory 25 used for controlling of driving an injection molding machine at the present time by operating a key of CRT/MDI28 as a selecting means and graphed data is displayed on a display screen of CRT/MDI28. A relation between the contents of the past molding conditions and the corresponding injection molding motions is properly grasped to make it as a reference for setting a molding condition and the optimum molding condition can be easily obtd. by changing arbitrarily setting of the molding condition of the non-volatile memory 25 and performing an operation for setting of the condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding information display device for an injection molding machine.

[0002]

2. Description of the Related Art Molding conditions for a plurality of injection molding dies, such as the relationship between the elapsed time after the start of injection and the injection pressure, the relationship between the screw position and the injection speed, and the like, are used as the molding conditions. It is stored in the control device of the injection molding machine or an external storage device in correspondence with the index code such as the characteristics of the mold, and when the mold is replaced, the mold name of the newly mounted mold and the molding characteristics, etc. There is a known injection molding machine (so-called mold file function) in which the molding condition of a new mold is set in the control device of the injection molding machine by designating the molding condition corresponding to the mold. is there. An injection molding machine that displays the molding conditions currently set in the control unit on the display screen of the injection molding machine using numerical values or graphs by selecting the display menu with soft keys etc. Display function) is also known. In addition, the molding data detected in the actual injection molding operation using the currently set molding conditions, such as the relationship between the elapsed time after the start of injection and the injection pressure and the relationship between the screw position and the injection speed, is injected. An injection molding machine (so-called high-speed monitor function) that displays a monitor during execution of a molding operation is already known.

[0003]

However, when the above-mentioned display function is used, the confirmation of the contents of the molding conditions is limited to the molding conditions currently set in the injection molding machine. In the case of performing injection molding work with various settings of molding conditions, when past molding conditions used previously are stored in the mold file together with molding features such as sink marks and burrs. Even if it exists, it cannot be called and displayed as reference data for setting conditions. If you want to call up past molding conditions and refer to them, specify the molding conditions by index code such as mold name and molding characteristics using the mold file function, and set the past molding conditions as the target to be executed once. There is no choice but to set to. However, when changing the molding conditions for condition setting, it is necessary to correct the molding conditions set in the injection molding machine. Therefore, the past molding conditions that were called once must be retained as they are for display. In reality, it is difficult to perform injection molding work for condition setting while referring to past molding conditions by the conventional mold file function and display function.

On the other hand, the relationship between the elapsed time after the start of injection and the injection pressure, the relationship between the screw position and the injection speed, and the like are sampled during the execution of the injection molding work, and are sampled every molding cycle or over several molding cycles. Therefore, a high-speed monitor function for displaying a graph is known. With this high-speed monitor function, it is possible to accurately grasp the molding data such as the relationship between the elapsed time after injection start and the injection pressure, which changes according to the setting change of the molding conditions, and the relationship between the screw position and the injection speed. Can However, it is very difficult to grasp the correlation between the molding conditions and the molding data because the past molding conditions are lost from the setting memory unit that stores the molding conditions to be executed each time the molding conditions are changed. . For example, even if the mold file function saves the past molding conditions each time the molding conditions are changed, the corresponding molding data cannot be saved. It is difficult to carry out the injection molding work for condition setting while referring to.

Further, according to the above-mentioned conventional technique, the condition setting of a trial mold similar to this is performed in the case of referring to the molding conditions of the injection molding mold whose condition setting has already been completed. Since the same problem as described above occurs, it is impossible to perform the condition setting work of the trial mold with reference to the molding conditions of the injection mold already stored in the mold file. In addition, the mold file does not have a function to save molding data such as the relationship between the elapsed time after the start of injection and the injection pressure and the relationship between the screw position and the injection speed. It is completely impossible to refer to the molding data relating to the injection molding die, whether it is a numerical display or a graph display.

Therefore, an object of the present invention is to solve the above drawbacks of the prior art, and to perform a completely new condition setting work by trial and error or a new condition setting work utilizing the experience of the conventional mold. It is an object of the present invention to provide a molding information display device for an injection molding machine, which makes it possible to refer to and compare the molding conditions used for molding and various molding data corresponding thereto, and to easily set the optimum molding conditions.

[0007]

A molding information display device of an injection molding machine according to the present invention uses a plurality of molding conditions and an index code for molding data detected when an injection molding operation is performed under each of the plurality of molding conditions. And a selecting means for selecting either the molding condition or the molding data corresponding to the index code from the file means by specifying the index code and the molding condition or the selection type of the molding data. And a display means for displaying the molding condition or molding data selected by the selecting means on a display screen of an injection molding machine,
The above object was achieved. Further, once the designated display standard is stored, when the molding condition or the selected type of molding data is designated based on the same display standard as the stored display standard, the molding condition or molding data of the index code designated in advance is stored. By providing overwriting display means for making a graph based on the stored display standard and overwriting it on the display screen of the injection molding machine, it became possible to simultaneously display a plurality of types of molding data and molding conditions detected by the same standard as a graph. . Furthermore, by dividing the display area of the display screen into a plurality of non-overlapping graph display areas and providing a display position setting means for cyclically updating the graph display area in which the graph should be displayed by designating a new index code,
Each molding condition and molding data corresponding to the index code can be referred to and compared at the same time and in a graph for easy identification for each index code.

[0008]

According to the designation of the index code and the molding condition or the selection type of the molding data, the molding condition or molding data corresponding to the index code is selected from the file means by the selecting means, and the selected molding condition or molding data is selected. Is graphed by the display means and displayed on the display screen of the injection molding machine. When the molding condition or molding data selection type is once specified, the overwriting display means stores it, and if the molding condition or molding data selection type is re-specified with the same display standard, it will be specified at the present time. The molding condition or molding data of the existing index code is graphed according to the display standard stored in the overwriting display means and is overwritten and displayed on the display screen of the injection molding machine. Also, when a new index code is specified, the display position setting means automatically updates and sets the graph display area in which the graph should be displayed, so that multiple molding conditions and molding data with different index codes can be set at the same time. A graph is displayed for easy identification.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a main part of an injection molding machine according to an embodiment. Reference numeral 1 is an injection cylinder of the injection molding machine, and reference numeral 2 is a screw. The screw 2 is a power transmission belt 6 wound around a lead screw 4 screwed into a ball nut portion of a pusher plate 7 or a pulley 5 integrated with the lead screw 4.
Is driven in the injection axial direction by the injection servomotor M through the like, and the resin pressure acting in the axial direction of the screw 2 is detected by the pressure detector 3 interposed between the base of the screw 2 and the pusher plate 7. It is supposed to be done. Further, the injection servomotor M is equipped with a pulse coder PC that detects the current position of the screw 2.

A control device 10 of an injection molding machine which also serves as a molding information display device includes a CNC CPU 18 which is a numerical control microprocessor, a PMC CPU 17 which is a programmable machine controller microprocessor,
Servo CPU, which is a microprocessor for servo control
19 and a CPU 16 for pressure monitoring for performing sampling processing of injection pressure and the like, and information can be transmitted between the microprocessors by selecting mutual input / output via the bus 21. CP for PMC
The U12 is connected to a memory 12 including a ROM storing a sequence program for controlling the sequence operation of the injection molding machine and a RAM used for temporary storage of operation data. On the other hand, the CNC CPU 18 is a ROM that stores programs for controlling the injection molding machine as a whole.
A memory 13 including a RAM used for temporary storage of operation data and the like is connected. Also, servo CPU
Each of the CPU 19 and the pressure monitor CPU 16 has a ROM 20 storing a control program dedicated to servo control, a memory 20 including a RAM used for temporary storage of data, and a ROM storing a control program related to molding data sampling processing and the like. A memory 15 including a RAM used for temporary storage of data is connected. Furthermore,
The servo CPU 19 is connected to a servo amplifier 14 for driving a servo motor of each axis for mold clamping, screw rotation, ejector (not shown) and injection based on a command from the CPU 19 for injection. The output from the pulse coder PC provided in the servo motor M is the servo CPU 19
The servo coder 19 returns to the pulse coder P.
The current position of the screw 2 calculated based on the feedback pulse from C is stored in the current position storage register of the memory 20.

The non-volatile memory 25 is a setting memory for storing a set of molding conditions corresponding to the injection mold to be subjected to the injection molding operation, various set values, parameters, macro variables, etc. 24, a first file means (hereinafter referred to as a mold file A) for storing some molding conditions set at the condition setting stage and molding data corresponding to each molding condition in association with the index code of the molding condition.
And a second file means (hereinafter referred to as a mold file B) for storing the index code of the injection-molding mold for which the condition setting has been completed and the molding condition and molding data of each mold in association with each other. Has been.

The pressure monitoring CPU 16 repeatedly executes a sampling process for each injection step, detects the injection pressure acting on the screw 2 via the A / D converter 11 and the pressure detector 3 at every predetermined sampling cycle. , The current position of the screw 2 is read from the current position storage register of the memory 20, and the current value of the injection pressure and the current position of the screw 2 are updated and stored in the pressure monitor RAM 23 for one injection step in correspondence with the sampling cycle. It has become. The pressure monitor RAM 23 stores a current value storage file for writing the current value of the injection pressure and the current position of the screw 2 in time series in synchronization with the sampling cycle and the sampling data detected in the latest one injection process. It has a sampling data save file for. Each time the injection process is completed, the sampling data save file is cleared to store the data of the current value storage file in the sampling data save file, and further, the current value storage file is cleared to prepare for the sampling process of the next injection process. I have to. What is used as the sampling data is the data stored in the sampling data storage file, that is, the sampling data substantially one injection step before.

The waveform display RAM 26 stores the molding conditions and molding data stored in the first file means and the second file means in the non-volatile memory 24 in the CP for PMC.
It is a RAM for temporarily storing the graph display data obtained by the analysis by U17. I / O interface 2
Reference numeral 2 is an input / output interface for receiving signals from limit switches and operation panels provided in each part of the injection molding machine and for transmitting various commands to peripheral equipment of the injection molding machine.

Then, the CNC CPU 18 uses the memory 13
The servo CPU 19 distributes pulses to the servo motors of the respective axes on the basis of the control program described above, and the servo CPU 19 sends the movement commands distributed to the respective axes and the position feedback signal and speed detected by the detector such as the pulse coder PC. Based on the feedback signal of (1), servo control such as position loop control, speed loop control, and current loop control is performed as in the conventional case, and so-called digital servo processing is executed. When the injection process is set to the pressure feedback control mode, the CP for CNC is based on the pressure waveform stored as the molding condition in the setting memory unit of the non-volatile memory 25.
U18 outputs a pressure command for each processing cycle, and servo CP
On the U19 side, pressure feedback control is performed so that the injection pressure detected by the pressure detector 3 matches the command resin pressure.

A manual data input device with a CRT display device (hereinafter, referred to as "display screen" and a part of selection means)
A CRT / MDI) 28 is connected to the bus 21 via a CRT display circuit 27 that also serves as an interface, and is used for selecting a data setting screen or function menu, inputting setting data, displaying a graph, and the like.

In the above configuration, the control program stored in the memory 13 and various molding conditions stored in the setting memory section of the non-volatile memory 25 and the memory 1 are stored.
By the sequence program etc. stored in 2, PMC
The CNC CPU 18 performs pulse distribution to the servo motors of the respective axes of the injection molding machine while the CPU 17 performs sequence control, and the servo CPU 19 performs digital servo control to drive and control the injection molding machine.

If there is no experience in handling molds of similar shape in the past, and the molding conditions of the prototype mold are determined by the condition setting operation due to trial and error based on the design information of the prototype mold, etc., First, a function menu key (not shown) of the CRT / MDI 28 is operated to call a molding condition setting screen, and measurement conditions such as back pressure and screw rotation speed and injection pressure holding conditions such as injection speed and injection pressure are displayed. Set the molding conditions. Alternatively, JP-A-62-218118 and JP-A-3-
Molding conditions are set in the setting memory section of the non-volatile memory 25 via the CRT / MDI 28 by the setting method of the reference pressure waveform as shown in No. 58821. Then, the injection molding machine is driven to execute the molding cycle. As described above, in the injection process of the molding cycle, the sampling process is executed by the CPU 16 for the pressure monitor, and the sampling data storage file of the RAM 23 for the pressure monitor shows that the injection is started in the molding cycle every time one injection pressure holding process is completed. The relationship between the elapsed time, the injection pressure, and the screw position is updated and stored. If a normal molded product cannot be obtained even after continuous operation under the molding conditions once set in the setting memory section of the non-volatile memory 25, the CRT / MD is again used.
I28 will be operated to correct the molding conditions in the setting memory section. However, if the operator judges that the molding conditions set at this point will be helpful in setting the conditions, the molding conditions at this time, etc. Memorize That is, before performing the operation of correcting the molding conditions, the function menu key of the CRT / MDI 28 is once operated to call the registration screen of the mold file, and the mold file A is designated as the registration destination file.
Further, if necessary, set an arbitrary index code, for example, a character string such as “sink” or “burr” indicating the characteristic of molding, and operate the function key “register” of the CRT / MDI 28 to set the setting memory at this time. Molding data stored in the sampling condition and sampling data storage file and the current date of the date device (not shown) inside the control device in correspondence with the index code, and the mold file of the non-volatile memory 24 Save in A. The mold file A is a sequential file as shown in FIG. 10, which sequentially updates the address of the storage area in response to the operation of the function key "register". It is not always necessary to input a character string such as "variable" as the index code, and if this input operation is omitted, the address of the storage area (hereinafter referred to as the sequence number) itself becomes the index code. Further, the processing for switching the screen and the registration operation is a time-division processing using a part of the function of the PMC CPU 17, and these processings do not hinder the continuous operation of the injection molding machine.

The operator who has completed the registration process again performs CR.
Operate the function menu key of T / MDI28 to display the molding condition setting screen, and then operate CRT / MDI28 to modify the molding conditions in the setting memory section to check the molding condition In addition, if there is a molding condition that serves as a reference for condition setting, the same registration operation as described above is performed if necessary.

However, even if the molding conditions are continued to be corrected depending on the intuition, the molding conditions do not always converge in the direction in which an appropriate molded product can be obtained. For example, the injection pressure is increased to eliminate the filling failure. As a result, burrs may be generated, and further, the injection speed may be reduced in order to suppress the generation of burrs, so that a phenomenon such as defective filling may occur again. In such a situation, an inexperienced operator may not be able to determine what kind of correction should be made to the molding conditions, and may fall into the dilemma of repeating the same mistake.
Most of the causes are that the operator himself does not properly grasp the relationship between the contents of the molding conditions tried so far and the corresponding injection molding operation.

In order to deal with such a problem, the molding information display device in this embodiment, that is, the control device 10 of the injection molding machine, is executed based on the molding conditions used at the stage of condition setting and each molding condition. A function is provided to display the molding data detected in the injection molding work performed as a graph, and the operator can use this function as necessary to confirm the details of the molding conditions that have been tried so far and the corresponding injection conditions. The relationship with the molding operation can be displayed.

2 to 5 are flowcharts showing an outline of a system program for "molding information display processing" stored in the memory 12, which is a CRT / MD.
It is activated by operating the function menu key of I28 to call the mold file display screen and then designating the mold file A. The "molding information display process" is a time-sharing process that uses a part of the functions of the PMC CPU 17,
These processes do not interfere with the continuous operation of the injection molding machine.

The PMC CPU 17 which has started the "molding information display process" first clears the display screen of the CRT / MDI 28 once, resets the function assignment of the function keys, and sets 0 to the display target selection flag F1. After that (step S1), the “sink” and “burr” currently saved in the mold file A of the non-volatile memory 25.
The index codes and dates such as "1" are displayed in a list on the display screen of the CRT / MDI 28 in association with the sequence number of the mold file A (step S2, see FIG. 6). Next, the PMC CPU 17 determines whether or not another function such as the molding condition setting screen is selected by operating the function menu key (step S3), and the sequence number as an index code for identifying the molding information display target is the CRT. / MDI 28 numeric keypad operation (step S4), and CRT / MD
It is sequentially determined whether or not the display item is selected by the I28 function key (step S9). If no operation is performed, the PMC CPU will be described below.
17 repeats only the determination process of step S3, step S4, and step S9, and waits for the operation for specifying the display target of the molding information or the selection operation of another screen (note that the molding information It is prohibited to select a display item before the display target is specified, and such an erroneous operation is automatically rejected by the determination processing in step S11).

Therefore, during this period, the operator
Referring to the DI28 list display, the sequence number corresponding to the index code for which the molding information is to be displayed based on the index code such as “sink”, “burr”, etc. set in advance, that is, in the past An operator searches for a sequence number for specifying a molding operation whose molding information is desired to be confirmed among the molding operations, and inputs the value of the sequence number using the ten keys.

Then, the PMC CPU 17, which repeatedly executes the discrimination processing of steps S3, S4 and S9, detects the input of the sequence number in the discrimination processing of step S4, and stores the value of the sequence number in the sequence number storage register. It is stored in R1 (step S
5), 1 is set to the display target selection flag F1 and 0 is set to the selection attribute storage flag F2 (step S6), C
The contents of the graph display area of the display screen of the RT / MDI 28 and the waveform display RAM 26 are cleared (step S7), the sequence number corresponding to the value of the register R1 is displayed in the graph display area as the molding condition number, and the sequence The index codes such as "sink" and "burr" stored in the mold file A and the date corresponding to the number R1 are displayed (step S8, see FIG. 6). As a result, the display target of the molding information is selected and the flag F1 is set to 1. As a result, the selection operation of the display item by the function key is permitted, and 0 is set in the selection attribute storage flag F2 in accordance with the selection operation of the new display target. As a result of being set, it is possible to arbitrarily select display items.

Next, the PMC CPU 17 executes step S
The process shifts to the determination process of 9 to determine whether or not the display item is selected by the function key of the CRT / MDI 28, but if the operation of the function key is not detected, the process proceeds to the determination process of step S3 again. , Step S3, Step S4, Step S
The determination process of 9 will be repeatedly executed. In addition, when the selection operation of the display target for which the molding information is to be displayed is erroneous, the display target is selected by performing a re-input operation of the sequence number and executing the processing of steps S5 to S8 again. It is possible to reselect.

When the operator who selects the display object by the operation of inputting the sequence number selects the display item by the function key of the CRT / MDI 28, the CP for PMC is displayed.
U17 detects this operation in the determination processing of step S9,
The display item is stored in the display item storage register R2 in accordance with the allocation of the function key (step S10).
The selectable display items are "time-pressure set value" (function key f1) for displaying the molding conditions in which the injection pressure is set based on the elapsed time after the start of injection, and the molding operation is performed under the set molding conditions. "Time-pressure actual measurement value" (function key f) for displaying the molding data when the
2), "Time-speed actual measurement value" (function key f3) for displaying the molding data when the molding operation is performed under the set molding conditions by the change of the injection speed based on time, the set molding "Time-position measured value" (function key f4) for displaying the molding data when the molding operation was performed under the conditions by the change of the screw position based on time, and the molding operation was performed under the set molding conditions. To display the molding data at this time by the change of injection pressure based on the screw position.
"Pressure measurement value" (function key f5), "position-speed set value" (function key f6) to display the molding conditions in which the injection speed is set based on the screw position, and the molding operation is performed under the set molding conditions. There is a "position-speed actual measurement value" (function key f7) for displaying the molding data when the injection speed changes based on the screw position.

The PMC CPU 17 which stores the display item in the display item storage register R2 determines whether the display target selection flag F1 is set to 1, that is, whether the selection of the display target is completed. (Step S11),
If the selection of the display target is completed, it is further determined whether the display item stored in the display item storage register R2 should be displayed on the time basis or the position basis (step S12). . Each of "time-pressure set value", "time-pressure actual measurement value", "time-speed actual measurement value", and "time-position actual measurement value" is a time reference,
Others are position references. If the display item stored in the display item storage register R2 is to be displayed on a time basis, the PMC CPU 17 then determines whether 2 is set in the selection attribute storage flag F2, that is, the display item is based on the position reference. It is determined whether or not the item is limited to one (step S13).

When 2 is set in the selection attribute storage flag F2, the selection operation of the display item this time is the second or later after the execution of the selection operation of the display object, and the first display Since it means that the display item is already limited to the position-based display item by the selection operation of the item, the time-based display item cannot be displayed. in this case,
The PMC CPU 17 shifts to the determination processing of step S3, and thereafter, in the same manner as described above, step S3, step S
4, the determination process of step S9 is repeatedly executed to wait until another display item based on time is selected again (step S9) or another display target is selected (step S9). Step S4).

On the other hand, when the selection attribute storage flag F2 is set to 0, the selection operation of the display item this time is the first time after the selection operation of the display object is executed, and the display item can be arbitrarily selected. In addition, when the selection attribute storage flag F2 is set to 1, it means that the selection operation of the display item this time is the second or later time after the execution of the selection operation of the display target. Also, it means that the display items have already been limited to the time-based ones by the first selection operation of the display items. Therefore, in any case, it is possible to display the time-based display item. In these cases, the PMC CPU 17 causes the selection attribute storage flag F to be displayed.
2 is set to 1 to limit the display items that can be selected to those that are time-based (step S14), and the process proceeds to the process for displaying the time-based display items (step S15).

In the PMC CPU 17 that has shifted to the processing for displaying the time-based display item, the display item stored in the display item storage register R2 is "time-pressure set value".
(Step u1), "time-pressure actual measurement value" (step u2), "time-speed actual measurement value", or "time-position actual measurement value" ( In step u3), a graph creating process corresponding to the display item is performed. That is, if the display item stored in the display item storage register R2 is "time-pressure set value", the PMC
The CPU 17 reads the molding condition in which the injection pressure is set based on the elapsed time after the start of injection from the storage area of the mold file A corresponding to the sequence number stored in the sequence number storage register R1, and the elapsed time after the start of injection The image of the set pressure waveform in which the set injection pressure is plotted on the vertical axis with the horizontal axis as the horizontal axis is additionally stored in the waveform display RAM 26 (step u6), and this image is displayed on the graph display area of the CRT / MDI 28 via the CRT display circuit 27. Display output (step u5). If the display item stored in the display item storage register R2 is "time-actual pressure measurement value",
The PMC CPU 17 uses the sequence number storage register R1.
Mold file A corresponding to the sequence number stored in
The molding data of injection pressure sampled based on the elapsed time after the start of injection is read from the storage area of the, and the image of the detected pressure waveform in which the elapsed time after the start of injection is plotted on the horizontal axis and the injection pressure is plotted on the vertical axis is displayed as a waveform. The image is additionally stored in the RAM 26 for use (step u7), and this image is displayed and output to the graph display area of the CRT / MDI 28 via the CRT display circuit 27 (step u5). If the display item stored in the display item storage register R2 is "time-speed actual measurement value", the PMC CPU 17 stores the die file A corresponding to the sequence number stored in the sequence number storage register R1. Corresponding to each sampling cycle by reading the molding data of the screw position sampled based on the elapsed time after the start of injection (step u8), obtaining the amount of change in the screw position between each sampling cycle and dividing by the sampling cycle The value of the injection speed to be calculated is calculated, and the image of the detected speed waveform in which the elapsed time after the start of injection is plotted on the horizontal axis and the injection speed is plotted on the vertical axis is additionally stored in the waveform display RAM 26 (step u9), and this image is displayed on the CRT. CRT / MDI2 via display circuit 27
The data is displayed and output in the graph display area 8 (step u5).
If the display item stored in the display item storage register R2 is “time-position actual measurement value”, the PMC CPU 17
Reads the molding data of the screw position sampled from the storage area of the mold file A corresponding to the sequence number stored in the sequence number storage register R1 based on the elapsed time after the start of injection, and displays the elapsed time after the start of injection. An image of the detected position waveform in which the screw position is plotted on the vertical axis as the horizontal axis is additionally stored in the waveform display RAM 26 (step u4), and this image is displayed on the CRT display circuit 27.
It is displayed and output to the graph display area of the CRT / MDI 28 via (step u5). Note that "time-pressure setting value"
FIG. 6 shows a display example of the set pressure waveform when is selected as the display item.

When the display item stored in the display item storage register R2 is to be displayed based on the position reference and the determination result in step S12 is false, that is, the operator selects the display item based on the position reference. In case, PMC
The CPU 17 determines whether the selection attribute storage flag F2 is set to 1, that is, whether the display items are limited to those based on time (step S).
16).

When the selection attribute storage flag F2 is set to 1, the present selection operation of the display item is the second and subsequent times after the execution of the selection operation of the display object, and the first display Since it means that the display item is already limited to the time-based one by the item selecting operation, the position-based display item cannot be displayed. in this case,
The PMC CPU 17 shifts to the determination processing of step S3, and thereafter, step S3, step S4, step S9.
The determination process of is repeatedly executed to wait until another display item based on the position is selected again (step S9) or another display target is selected (step S4).

On the other hand, when the selection attribute storage flag F2 is set to 0, the selection operation of the display item this time is the first time after the selection operation of the display object is executed, and the display item can be arbitrarily selected. In addition, when the selection attribute storage flag F2 is set to 2, it means that the selection operation of the display item this time is the second and subsequent times after the execution of the selection operation of the display target. In addition, it means that the display item is already limited to the position-based one by the first selection operation of the display item. Therefore, the flag F2 is 0
It is possible to display the position-based display item in both cases of 1 and 2, and in these cases, PM is displayed.
The C CPU 17 sets the selection attribute storage flag F2 to 2 to limit the selectable display items to those of the position reference (step S17), and shifts to the process for displaying the position reference display item (step S17). S18).

In the PMC CPU 17 that has shifted to the processing for displaying the position-based display item, the display item stored in the display item storage register R2 is "position-pressure actual measurement value".
(Step v1), "position-speed set value" or "position-speed measured value" (step v2), and a graph creation process according to the display item is performed. That is, if the display item stored in the display item storage register R2 is "position-measured pressure value", PM
The C CPU 17 uses the molding data of the screw position sampled from the storage area of the mold file A corresponding to the sequence number stored in the sequence number storage register R1 based on the elapsed time after injection start and the elapsed time after injection start. The injection pressure molding data sampled with reference to is read, and an image of the detected pressure waveform obtained by plotting the injection pressure on the vertical axis with the screw position on the horizontal axis is additionally stored in the waveform display RAM 26 (step v6). Through the CRT display circuit 27 to CRT / MDI2
Display output to the graph display area 8 (step v5).
If the display item stored in the display item storage register R2 is "position-speed set value", the PMC CPU 17
Reads the molding condition in which the injection speed is set with the screw position as the reference from the storage area of the mold file A corresponding to the sequence number stored in the sequence number storage register R1, and sets the injection speed on the horizontal axis with the injection speed set on the vertical axis. The image of the set speed waveform plotted on the
The image is additionally stored in the AM 26 (step v7), and this image is displayed and output to the graph display area of the CRT / MDI 28 via the CRT display circuit 27 (step v5). If the display item stored in the display item storage register R2 is "position-speed actual measurement value", the PMC CPU 17 stores the die file A corresponding to the sequence number stored in the sequence number storage register R1. The molding data of the screw position sampled based on the elapsed time after the start of injection is read from (step v3), the change amount of the screw position during each sampling period is calculated, and divided by the sampling period to determine the screw for each sampling period. The value of the injection speed corresponding to the position is calculated, and the image of the detected speed waveform obtained by plotting the injection speed on the vertical axis with the screw position on the horizontal axis is additionally stored in the waveform display RAM 26 (step v4), and this image is displayed on the CRT. Display output to the graph display area of the CRT / MDI 28 via the circuit 27 (step Flop v5).

The PMC CPU 17 which has executed the graph display in the process of step S15 (step u1 to step u9) or step S18 (step v1 to step v7) according to the selection operation of the display object and the display item again determines the determination in step S3. Move to processing, and then step S
Repeatedly performing the determination processing of 3, step S4, and step S9 to select another function (step S3), or to additionally select another display item having the same display reference for the same display target (step S3). S9), or it waits for another display target to be newly selected (step S4).

During this time, when the operator operates the function key to additionally select another display item of the same display standard, the PMC CPU 17 detects this operation in the discrimination processing of step S9, and thereafter, step S10 to step S1.
5, or the processing of step S10 to step S12 and step S16 to step S18 is executed in the same manner as described above, and another display item of the same display standard is displayed on the CRT / MD.
Overwrite and display in the graph display area of I28. That is,
When the operator operates the function key without performing the reselection operation of the display target, the processing of steps S5 to S8 is not executed, so that the sequence number storage register R1 stores the display target selected at this time. Holds the sequence number as it is, and also has a waveform display RAM
26 and the graph display area are not erased, so P
The MC CPU displays the graph of the display item newly selected in the process of step S9 on the already selected display target. As described above, display items that can be overwritten have the same display standard,
That is, the unit of the display reference that is the horizontal axis of the graph is limited to the same unit. For example, when “time-pressure setting value” is selected in the first operation of selecting the display item for a certain sequence number, , "Time-pressure measured value", "time-speed measured value", "time-position measured value" can all be overwritten, but "position-pressure measured value", "position-speed set value", The "position-speed measured value" cannot be selected as a display item (in this case, the attribute storage flag F2 is set to 1 by the first operation of selecting the display item. Process is rejected).

Further, the PMC CPU 17 executes the step S
When the operator newly inputs the value of the sequence number corresponding to the index code for which the molding information is to be displayed by the ten-key while repeatedly performing the determination processing of 3, step S4 and step S9, the PMC CPU 17 executes step S4. After detecting this operation in the determination processing of step S5, the steps S5 to S8 are executed in the same manner as described above to store the value of the newly selected sequence number in the sequence number storage register R1 and the selected attribute. The storage flag F2 is reset to 0 to allow an arbitrary selection operation of the display item, the contents of the graph display area of the display screen of the CRT / MDI 28 and the waveform display RAM 26 are cleared, and the value of the register R1 is set in the graph display area. The sequence number corresponding to is displayed as the molding condition number and the sequence number Re-display the index code such as “sink”, “burr”, etc. stored in the mold file A corresponding to R1 and select the display item for the newly selected display target. You will have to wait.

Thereafter, the operator repeatedly executes the above-mentioned graph display operation as necessary, and confirms the relationship between the contents of various molding conditions tried so far and the corresponding injection molding operation by the graph display, and the conditions are confirmed. Obtain the molding conditions suitable for the injection mold being used. Then, the operator operates the function menu key of the CRT / MDI 28 to select the molding condition setting screen again, and step S
The "molding information display process" is once terminated by the determination process of 3, the molding condition setting screen is called, the newly obtained molding condition is set in the setting memory unit of the non-volatile memory 25, and the molding condition is corrected. Conditions are checked while checking the molded product, and the registration and calling operations of molding conditions are repeatedly executed as necessary, and finally, the most suitable molding for the injection mold that is performing the conditions. The condition is obtained and set in the setting memory section. Then, if the most suitable molding conditions are obtained, the operator operates the function menu key of the CRT / MDI 28 to call the mold file registration screen, and designates the mold file B as the registration destination file, and If necessary, set an arbitrary index code, for example, a character string such as the mold number or mold name that specifies the mold, and operate the function key "register" of the CRT / MDI 28 to set the memory area at the current time. Molding data stored in the sampling condition and the molding data stored in the sampling data storage file and the current date of the date device (not shown) inside the control device are associated with the index code, and the mold file B of the nonvolatile memory 24 is stored. To save the data in the mold file A. The mold file B is a second file means for storing the index code of the injection molding mold for which the condition setting is completed, the optimum molding condition and the molding data of each mold in association with each other. It is similar to the mold file A.

The case where the molding conditions are determined by the condition setting operation by trial and error for the trial mold has been described above. However, referring to the molding conditions of the injection molding mold which has already completed the condition setting. In the case of performing a trial mold condition setting similar to this, by operating the function menu key of the CRT / MDI 28 to select the mold file display screen and designating the mold file B, By activating the "molding information display process", while confirming the optimum molding conditions of the existing mold that has already been condition-examined and the relationship with the corresponding injection molding operation with a graph display, A condition setting operation can be performed. Since the index code of the mold file B is composed of the mold name and the mold number, the display state of the CRT / MDI 28 is slightly different (see FIG. 7), but each process in the “molding information display process” is as described above. It is similar to the description.

As described above, according to the molding information display apparatus of the present embodiment, the relationship between the contents of various molding conditions tried at the condition setting stage and the corresponding injection molding operation, and the existing similarities. The relationship between the optimum molding conditions of the mold and the corresponding injection molding operation can be accurately grasped by the graph display and used as a reference for setting the molding conditions of the new mold, so the molding conditions suitable for the mold Can be obtained in a short time.

FIG. 8 shows a "molding information display process" according to another embodiment.
10 is a flowchart showing a part of step S1 to step S8 in the "molding information display process" of the above-described embodiment.
It is used instead of processing. In this embodiment, the CRT / MD
The display screen of I28 is divided into a plurality of graph display areas (an example of the number of divisions N = 4 is shown in FIG. 9), and the graph is displayed each time a new sequence number is input in the "molding information display process". Since the graph display area to be displayed is automatically updated in sequence, the relationship between the various molding conditions tested at the condition setting stage and the corresponding injection molding operation, and the optimum molding of existing similar dies The relationship between the condition and the injection molding operation corresponding thereto can be displayed on the same screen for a plurality of sequence numbers.

This embodiment will be briefly described below. Note that the processes of steps T2 to T5 and steps T9 to T10 in FIG. 8 are substantially the same as the processes of steps S3 to S8 in FIG. 2, and the difference between this embodiment and the above-described embodiments is Mainly, the value of the display position storage register R3 is initialized to 0 in the process of step T1, and the process of step T6 to step T8 corresponds to the input operation of a new sequence number. On the basis of the point of cyclically updating the value and the updated value of the display position storage register R3, the graph display area which becomes the new display position is cleared by the processing of step T9, and further by the processing of step T10. The point is that a rewriting operation of a sequence number or an index code is performed on the display area and a graph is displayed in the graph display area.

Therefore, according to this embodiment, the CRT / MD
At the stage where the mold file display screen is selected by operating the function menu key of I28, first, the display position storage register R
The value of 3 is initialized to 0 (step T1), and then the operator inputs the first sequence number corresponding to the index code for which the molding information is to be displayed by the ten key (step T3). The value of the memory register R3 is updated from 0 to 1 (step T6). Next, the PMC CPU 17 determines that the current value of the display position storage register R3 is the number N of divisions of the display screen.
It is determined whether or not it exceeds (step T7). If the current value of the register R3 does not exceed the number N of divisions of the display screen, the PMC CPU 17 displays the display position memory register R
Only the graph display region R3 corresponding to the value of 3 is cleared (step T9), and the sequence number or index code of the display target currently selected as the display target is displayed in this region (step T10). The graph display is executed only in the graph display area by the same processing as in the above-described embodiment. Below, display position memory register R3
Until the current value of exceeds the number N of divisions of the display screen, the processing of steps T4 to T7 and step T9 is repeatedly executed each time an input operation of a new sequence number is detected, and the display position storage register R3 A graph is displayed in the new graph display area shown. When the current value of the display position storage register R3 exceeds the number N of divisions of the display screen while repeatedly performing such a display operation, the determination result of step T7 becomes true and the display position storage register R3 is reset to 1. Set, again,
The graphs are displayed in order from the first graph display area.

As in the case of the above-described embodiment, the value of the sequence number storage register R1 is not updated unless a new value of the sequence number is input, so by operating the function key for selecting the display item a plurality of times. , It is possible to overwrite the graph of molding conditions and molding data of the same display standard in the graph display area selected for a certain sequence number, and especially for the injection mold whose condition setting has been completed. This is convenient for displaying a list of molding conditions and molding data for a plurality of molds when the similar conditions are set for a prototype mold by referring to the molding conditions.

If the numerical values of the molding conditions called from the molding condition storage RAM 24 are also displayed on the graph of the molding conditions and the molding data, the optimum molding conditions can be obtained more easily.

[0046]

The molding information display device of the injection molding machine according to the present invention does not need to set the past molding conditions stored in the file means such as the mold file as the execution target in the control device of the injection molding machine. Since the molding conditions can be displayed on the display screen, the past molding conditions can be confirmed while freely changing the molding conditions and performing the condition setting operation. In addition, the file means stores not only the molding conditions tested by the condition setting operation but also the actual molding data corresponding to each molding condition. Moreover, by selecting the index code and the selection type with the selecting means, past molding can be performed. Since the conditions and the actual molding data corresponding to them can be freely displayed on the display screen as a graph, it is possible to accurately grasp the relationship between the contents of the molding conditions tested so far and the corresponding injection molding operation. It can be used as a reference for setting molding conditions for a new mold, and molding conditions suitable for the mold can be obtained in a short time.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main part of an injection molding machine and a main part of a control device of an injection molding machine which is a molding information display device according to an embodiment.

FIG. 2 is a flowchart showing an outline of a “molding information display process” by the molding information display device of the embodiment.

FIG. 3 is a continuation of the flowchart showing the outline of “molding information display processing”.

FIG. 4 is a continuation of the flowchart showing the outline of “molding information display processing”.

FIG. 5 is a continuation of the flowchart showing the outline of “molding information display processing”.

FIG. 6 is a diagram showing a display example of a display screen in “molding information display processing”.

FIG. 7 is a diagram showing a display example of a display screen in a “molding information display process”.

FIG. 8 is a flowchart showing a part of a “molding information display process” of another embodiment.

FIG. 9 is a diagram showing a display example of a display screen in a “molding information display process” of another embodiment.

FIG. 10 is a diagram conceptually showing a mold file in each example.

[Explanation of symbols]

3 Pressure Detector 10 Control Device (Molding Information Display Device) 11 A / D Converter 12 Memory 16 Pressure Monitor CPU 17 PMC CPU 21 Bus 23 Pressure Monitor RAM 24 Nonvolatile Memory (File Means) 25 Nonvolatile Memory 26 Waveform display RAM 27 CRT display circuit 28 Manual data input device (display screen) with CRT display device M Injection servo motor PC Pulse coder

Claims (4)

[Claims] 1. A file means for storing a plurality of molding conditions and molding data detected when an injection molding operation is performed under each of the plurality of molding conditions in association with an index code, and designating the index code and the molding condition. Alternatively, a selection means for selecting either the molding condition or the molding data corresponding to the index code from the file means by designating the selection type of the molding data and the molding condition or the molding data selected by the selecting means are graphed. A molding information display device for an injection molding machine, comprising: a display unit for displaying on a display screen of the injection molding machine. 2. A file for storing a plurality of set molding conditions and molding data detected by a time reference or a screw position reference when an injection molding operation is performed under each of the plurality of molding conditions in association with an index code. Means, the index code and the molding condition or the selection type of the molding data, and the time reference or the screw position reference display reference, the file means specifies either the molding condition or the molding data corresponding to the index code. Injection molding, characterized by comprising: selecting means for selecting; molding means or molding data selected by the selecting means is displayed as a graph on a display screen of an injection molding machine in accordance with a designated display standard. Molding information display device. 3. A file for storing a plurality of set molding conditions and molding data detected by a time reference or a screw position reference when an injection molding operation is performed under each of the plurality of molding conditions in association with an index code. Means, the index code and the molding condition or the selection type of the molding data, and the time reference or the screw position reference display reference, the file means specifies either the molding condition or the molding data corresponding to the index code. The selecting means for selecting, the displaying means for displaying the molding condition or the molding data selected by the selecting means in a graph on the display screen of the injection molding machine by the specified display standard, and the display standard once specified are stored. , Selecting molding conditions or molding data with the same display standard as the stored display standard When the type is designated, a molding condition or molding data of a designated index code is graphed on the basis of the stored display standard and is overwritten and displayed on the display screen of the injection molding machine. Molding information display device for injection molding machine. 4. A display position setting means for dividing a display area of a display screen into a plurality of non-overlapping graph display areas and cyclically updating the graph display area for displaying a graph by designating a new index code. The molding information display device of the injection molding machine according to claim 1, claim 2 or claim 3.