JPH10202715A - Method of displaying graphic image in injection molder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the easy and sure reading of values out of graphic display data on a display screen by a method wherein the lateral lattice or the scale lattice of a graph partitioning the axis of ordinates is automatically selected to be equally divided into a complete number of divisions common to respective items. SOLUTION: When the value of the total stroke in the data of the axis of abscissas of, for example, a charging stoke is 78mm, 80mm is selected as the graph scale value of the axis of abscissae. On the other hand, when the maximum value of a back pressure, which is the data of the axis of ordinates of the changing stroke is 83.5kgf, 100kgf is selected as the graph full scale value of the axis of ordinates. On the basis of the above-mentioned respective graph scale values of the axis of abscissae and of the axis of ordinates, a graph scale generating part 15 generates graph scale lattice in dot representation into a complete number of divisions such as the number of equal divisions of 4, 5, 8, 10, 20 or the like by respective graphic displaying items in a graphically displaying frame region and scale value data corresponding to the generated graph scale lattice.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of displaying a graphic image in an injection molding machine, and more particularly to a microcomputer (hereinafter referred to as "microcomputer") for capturing and storing operation data during continuous operation and under the control of the microcomputer. And a display device capable of displaying various mode images.

[0002]

2. Description of the Related Art A recent microcomputer-controlled injection molding machine is provided with a display device such as a color CRT display and a color LCD display. The display device sets or confirms molding operation conditions for automatic molding operation. Display mode image for displaying various setting conditions for performing automatic inspection, various actual measurement data display mode images for displaying actual measurement data of many measurement items during automatic molding operation, A periodic inspection mode image for prompting, an alarm mode image for recognizing this when an abnormality occurs, and the like are displayed.

[0003] By the way, images displayed in the above-mentioned actual measurement data display mode are conventionally often shown with numbers in a row, which causes a problem that it is difficult to grasp at a glance operating characteristics such as an injection stroke. . In view of this point, the applicant of the present application has developed a machine (injection molding machine) having a function of displaying measured data of an injection process together with set values as a graphic image on a display screen, and has proposed it as Japanese Patent Application Laid-Open No. 2-26724. .

[0004]

In the above-mentioned prior application, the maximum value of data to be graphically displayed is automatically set and displayed on the display screen as the maximum value of the graph scale (graph full scale value). Graphically display the actually measured data on all the edges of the graph display frame area on the screen, and generate a graph scale grid and scale figures by dividing the maximum value of the graphic display data into, for example, 10 divisions. Was displayed. Therefore, for example, when the maximum value of the data to be graphically displayed is a well-chosen numerical value such as 10, 12, 16,..., The graph scale grid and the scale numeral are well-separated, but in such a case, it is rare. Normally, the maximum value of the displayed data is a poorly-cut numerical value such as 89.1, for example. Therefore, the graph scale grid and the scaled numerical value are also hard-to-cut, so that the graphic display data on the display screen is It was pointed out that there was a problem that it was difficult to read the value directly.

Japanese Unexamined Patent Publication (Kokai) No. 61-290485 discloses, in a display system for displaying raw data collected from an experimental apparatus or a plant and their processed data in a graph, data having a vertical display range of the graph. There has been disclosed a technique for automatically calculating the number from the. In the display system shown in this prior application, the maximum value Ymax on the vertical axis is determined by adding +1 to the most significant digit data of the given maximum value data and returning it to the original number of digits. The minimum value Ymin on the vertical axis is determined by taking only the most significant digit data of the given minimum value data and returning it to the original number of digits.
Therefore, according to the technology disclosed in this prior application, for example, the maximum value Ymax-minimum value Ymin (that is, the full scale value of the vertical axis) on the vertical axis is 10 or 5 or 4 such as “7” or “13”. This often causes a graph full-scale value for which a well-divided equal division number (a well-divided scale grid) cannot be obtained, which makes it difficult to read numerical values from graph data. Further, according to the technology disclosed in the prior application, the minimum value Ymin on the vertical axis is determined by taking only the most significant data of the given minimum value data and returning it to the original number of digits. Therefore, the origin of the vertical axis may not be 0 (zero). In this case, the origin of the vertical axis is raised, and the absolute amount of the displayed graphic data from 0 (zero) is intuitive. There is also a problem that it becomes difficult to grasp.

[0006] The present invention has been made in view of the above points,
Its purpose is to enable easy and reliable reading of numerical values from graphic display data on the display screen, automatic full scale setting and automatic creation of graph scale grids, and one graph display frame. When displaying multiple items of graphic data simultaneously in an area, a method of displaying graphic images on an easy-to-use injection molding machine that is easy to read numerical values from the graphic display data, is reliable, and is generally excellent in visibility. To provide.

[0007]

In order to achieve the above object, the present invention comprises a microcomputer for driving and controlling each part of the machine based on each set operation condition value and measurement information from each sensor. The microcomputer executes a series of molding operation steps such as a charge step, a mold opening / closing step, an injection step, an eject step, etc., according to a predetermined molding operation program, and captures and stores actual measurement data of each operation condition during operation. In addition, according to an instruction of the operator, the microcomputer converts the set operating condition value or the fetched actual measurement data, and displays the setting data or the graphic image of the actual measurement data on a display device attached to the machine. In the method of displaying a graphic image in the above, the microcomputer instructs display in the automatic scale mode. The maximum value of the graph data for the graphic image is compared with a graph full-scale value group consisting of preset good numerical values (separation), and the minimum value of the graph data for display is reduced. Determine a graph full scale value, create a graph scale grid in a graph display frame area based on the determined graph full scale value and create a scale value, and set the setting data graph in the graph display frame area. Alternatively, when displaying an actually measured data graph, and simultaneously displaying the setting data graph or the actually measured data graph of a plurality of items in the graph display frame area, a horizontal grid of a graph scale grid dividing the vertical axis is used. Cut (separate) in common for items
Is automatically selected so as to obtain a good number of equal divisions.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a simplified block diagram of a control system of the injection molding machine according to the present embodiment. In FIG. 1, reference numeral 1 denotes a microcomputer that controls the operation and display of the entire machine (injection molding machine), 2 denotes a sensor group including a large number of sensors provided in each part of the machine, and 3 denotes a sensor group provided in each part of the machine. A driver group composed of a large number of driver circuits for driving and controlling a large number of provided driving sources, 4 is a key input device disposed on the front surface of the machine, and 5 is disposed adjacent to the key input device. The display device is, for example, a color CRT display, a color LCD, or the like.

The microcomputer 1 shown in FIG.
Control of the entire molding process such as injection operation, mold opening / closing operation, and eject operation, calculation / storage processing of measured data, determination processing of non-defective / defective products, calculation / determination processing such as abnormality determination processing, or processing of the display device 5 Various processes such as output image display control processing are executed. This microcomputer 1 actually has various I
Although it is configured with an I / O interface, a ROM, a RAM, a CPU, and the like, and executes various processes by various programs created in advance, in the present embodiment,
The following description is given assuming that the apparatus includes the molding condition setting storage unit 10, the molding process control unit 11, the actually measured value storage unit 12, the display processing unit 13, and the like. The display processing unit 13 includes a data conversion processing unit 14, a graph scale generation unit 15, a display fixed data storage unit 16, a display image data generation unit 17, and the like.

Various operating condition values input by the key input device 4 are stored in the molding condition setting storage unit 10 in a rewritable form. The operation condition values include, for example, the tightening force, the electric power value, the relationship between the screw position and the screw rotation speed during the charge stroke, the screw retreat speed, and the back pressure, the suck back control condition, and the injection start point (position). Injection speed conditions and injection pressure conditions up to the holding pressure switching point (position), secondary injection pressure (holding pressure) conditions from the holding pressure switching time to the end of the holding pressure, band heater temperature of each part, mold closing (mold closing) ) Stroke and speed control conditions, mold clamping force, mold opening stroke and speed control conditions, eject control conditions, control conditions for automatic product unloading machine, and the like.

The molding process control unit 11 is configured to control the sensor group 2 provided in each unit of the machine based on a molding process control program created in advance and setting condition values stored in a molding condition setting storage unit 10. While referring to measurement information from (position sensors, pressure sensors, temperature sensors, etc.) and time measurement information from a clock incorporated therein, through the driver group 3 (motor drivers, hydraulic cylinder drivers, heater drivers, etc.) The drive of the corresponding drive source is controlled to execute a series of molding steps. Specific examples of the sensors included in the sensor group 3 include an ACC (accumulator) charge pressure detection sensor, a screw stroke detection sensor, a screw rotation speed detection sensor, an injection pressure and back pressure detection sensor, a mold opening / closing stroke detection sensor. , A mold clamping pressure detection sensor, an in-mold pressure detection sensor, an eject ejection / return stroke detection sensor, an eject cylinder pressure detection sensor, an operation confirmation sensor of an automatic product take-out machine, a temperature sensor of each part, a power value detection sensor, and the like.

The actually measured value storage unit 12 stores all actually measured data of preset monitor items during continuous automatic operation over a predetermined number of consecutive shots. The monitored items to be captured include a time monitoring item, a position monitoring item, a rotation speed monitoring item, a speed monitoring item, a pressure monitoring item, a temperature monitoring item, a power monitoring item, and the like. Are almost overlapped. The actual speed value is calculated in real time by an unillustrated arithmetic processing unit in the microcomputer 1 based on the measurement information from each stroke (position) detection sensor and the clock information. Is stored in a predetermined area.

The display processing unit 13 displays display image data of a designated display mode based on a display image creation / control program created in advance by an instruction to call a display image in a mode desired by the operator using the key input device 4. Create That is, when a call instruction of a predetermined display image arrives from the operator, the data conversion processing unit 14 of the display processing unit 13 reads the information stored in the molding condition setting storage unit 10 or the measured value storage unit 12 as necessary. Data to be used for displaying the display mode image is extracted, and the data is converted into a form corresponding to the specified display mode of the display mode image. For example, if the designated display mode is a graphic image of a certain process,
The extracted data is converted to line drawing image data. If the designated display mode is an operation state setting image of a certain stroke, the extracted data is converted to numerical image data. If the designated display mode is a graphic image, the graph scale generation unit 15 generates a graph scale (graph graph) created in advance based on the contents of the data conversion processing unit 14 or a scale instruction from the operator. A scale) generation program generates graph scale grid image data and scale numerical image data at a predetermined magnification.

In this embodiment, the automatic scale mode is selected by the system when the graphic image is initially called, and the automatic scale instruction signal S1 is input to the graph scale generation unit 15. At this time, the graph scale generation unit 15 determines the maximum values of the horizontal and vertical axes of the graph data of the item instructed to be displayed, which are fetched from the data conversion processing unit 14, and sets a preset (delimiter) for each item. The horizontal axis and the vertical axis graph full scale value group consisting of good numerical values are compared with each other, and the minimum graph full scale value in which the graph data for display is stored is determined on the horizontal axis and the vertical axis, respectively. Based on the graph full scale value, a graph scale grid is created in the graph display frame area and a scale numerical value is created. For example, regarding the graphic image of the charge process, the graph full-scale value group on the horizontal axis is 10, 12, 16, 20, 20, 24, 3
0, 32, 40, 50, 60, 80, and 10
A value obtained by multiplying a power of 1 or a power of 1/10 is prepared. In addition, as a graph full scale value group on the vertical axis,
10, 16, 20, 40, 50, 80, and 1
A numerical value obtained by multiplying a power of 0 or a power of 1/10 is prepared. Therefore, for example, the total stroke value (the total retreat distance of the screw) as the horizontal axis data of the charge process is 78 m.
m, the graph full scale value on the horizontal axis is 80
(Mm) is selected, and if the maximum value of the back pressure, which is the vertical axis data of the charging process, is 83.5 kgf, 100 (kgf) is selected as the graph full scale value on the vertical axis. Then, the graph scale generation unit 15 determines a graph display frame area (21 in FIG. 2) predetermined for each graphic display item based on the graph full scale values on the horizontal axis and the vertical axis determined in this manner. In addition, this is also a predetermined well-divided number of divisions (for example, 4, 5, 8, 10, 20
A graph scale grid (22 in FIG. 2) is created by dot display so as to obtain the same number of divisions, and scale numerical data (23 in FIG. 2) corresponding to this is created. Further, each unit grid of the graph scale grid is created as data (FIG. 3) obtained by dividing the unit grid by dots such that the unit grid is also a well-divided number (for example, 4, 5, 10). Note that the above-described graph full-scale value group and the number of equally-divided graph scale grids corresponding to this group can be set arbitrarily, taking both visibility and the burden of software construction into consideration. Can be set appropriately.

On the other hand, when a scale setting instruction signal S2 arrives at the graph scale generating section 15 by an operator's key operation, the display processing section 13 enters a scale setting mode (scale setting mode by an operator). In the present embodiment, when only the scale setting instruction signal S2 is input, the display processing unit 13 is out of the automatic scale mode, and the graph scale image data generated by the graph scale generation unit 15 And the scale numerical image data are fixed (fixed scale mode), and even if the maximum value of the data from the data conversion processing unit 14 changes in this state, the graph scale image data and the scale numerical image data change. do not do. Then, from the initial state of the scale setting mode, a graphic display item desired by the operator is specified, and a scale instruction signal for specifying an enlargement / reduction ratio for the graphic display item, that is, a horizontal axis and a vertical axis are displayed. Minimum value, maximum value [(X
mim, Xmax), (Ymim, Ymax)]
The graph scale generation unit 15 sets the minimum value and the maximum value of the horizontal axis in the graph display frame area to (Xmim, Xmax), and sets the minimum value and the maximum value of the vertical axis to (Ymim) based on the scale setting value by the operator. , Ymax), a graph scale grid is created in the graph display frame area so as to provide well-divided scale values, and a scale value corresponding to this is created.

The data conversion processing unit 14 receives the information of the graph scale grid image data and the scale numerical image data created by the graph scale generation unit 15 as described above, and outputs the data to be placed on the graph scale grid. Is converted to an enlargement / reduction ratio according to the graph scale to obtain line drawing data.

The processing data generated by the data conversion processing unit 14 and the graph scale generation unit 15 is taken into the display image data generation unit 17 and is placed at a predetermined position on the graph scale grid image data at a predetermined magnification. Is converted to an enlargement / reduction ratio corresponding to the image data, and the graphic image data is overwritten and synthesized. Also, from the fixed data for a large number of mode images, characters, symbols, graphic figures, ruled line data, etc., which are created and stored in the display fixed data storage section 16 in advance, they are used for displaying the display mode image. The data is extracted,
This is taken into the display image data generation unit 17, and is similarly synthesized as image data for display. by this,
The display image data generation unit 17 has a predetermined arrangement of graph scales, scale numbers, line drawing graphs, mode display characters, unit symbols, item display characters, and the like for the designated graphic display image.
Image data that is synthesized and to which color separation information and the like are added is created, and this is held in a rewritable manner. If the designated display mode is not a graphic image, the image data for the designated display image is also converted to the display image data generation unit by the data conversion processing unit 14 and the contents of the fixed display data storage unit 16. 17 is generated and held.

The image data of the display image data generation unit 17 is transferred to a frame buffer (not shown) and temporarily stored, and the output of the frame buffer is sent to the display device 5 according to a command from the display processing unit 13. Display device 5
Will be displayed on the display screen.

FIG. 2 shows the charge process graphic image of the latest molding cycle called on the display screen of the display device 5 in the automatic scale mode when the operator designates the display of the graphic image of the charge process. In the figure, the horizontal axis indicates the position of the screw (screw retraction stroke), and the numerical value indicating the scale of the screw is shown on the lower side. In the example of the charging process shown in FIG. 2, the total stroke of the screw (stroke from the injection completion position, which is the forward limit to the metering completion point, which is the retreat limit) is about 78 mm, and the full scale value of the horizontal axis of the display screen is 80 mm. It is set, and the vertical grid lines of the graph scale grid 22 that divide the entire horizontal axis are generated so as to equally divide 80 mm into 20. Also, the graph display frame area 21
In FIG. 2, the vertical axis indicates the back pressure on the left side, and the numerical value indicating the scale thereof is shown on the left side of the figure. In the example of FIG. At 5 kgf, the full scale value of the vertical axis for the back pressure is set to 100 kgf. Further, in the same figure on the vertical axis, the right side shows the number of rotations of the screw and the retreating speed of the screw, and the numerical values indicating these scales are two-tiered on the right side of the figure (upper number of rotations and lower is speed), respectively. In the example of FIG. 2, the measured maximum value of the rotation speed of the screw is about 42 rpm, the full scale value of the vertical axis for the rotation speed is set to 50 rpm, and the measured maximum value of the retreat speed of the screw is set. Is about 37.5m
m / s, the full scale value of the vertical axis for the reverse speed is 40 mm
/ S is set.

In the example shown in FIG. 2, the vertical axis serves as an index indicating the values of three items (back pressure, rotation speed, speed), and the full scale values are different from each other. Is the graph scale grid 2 that separates the vertical axis
Two horizontal grids are selected so as to have a common division number that is well-divided for each item. In this case, the vertical axis is equally divided into ten. In this way, even if the full scale value on the vertical axis is different for each item, it is possible to easily read the numerical value of the graphic data of each item with good visibility.

FIG. 3 is an enlarged view of a main part of the above-mentioned graph scale grid 22, and each unit scale grid line of the graph scale grid 22 is a division number which can be easily cut by the unit scale grid as shown in FIG. Are displayed in a dot-divided form, where the vertical and horizontal dimensions of the unit scale grid are 5
It is represented by one dot.

In FIG. 2, reference numeral 24 denotes measured data of the back pressure, 25 denotes measured data of the screw rotation speed, 26 denotes measured data of the screw retreat speed, 27 denotes set data of the back pressure, and 28 denotes the set data of the back pressure. Indicates setting data of the screw rotation speed. Here, on the display screen of FIG. 2, the graph characteristic lines relating to pressure, speed, and rotation speed are displayed in different colors, respectively, and each scale numeral, unit, and character are unified with the same color according to this color classification. Is displayed so that the operator can recognize at a glance which graph characteristic line represents what (this color classification is the same in other graphic images as well). is there).

As described above, the graphic image in the automatic scale mode is indicated by a sharp full scale value and a sharp scale corresponding thereto, so that reading of each data on the display screen becomes easy and reliable. .

Here, what is shown on the lower side of the display screen of FIG. 2 is the current operation function assigned to a function key (not shown) in the key input device 4 displayed in the graphic image display state. The current display mode is shown. In the initial state, “= write once” and “= automatic” are displayed. In this state, the microcomputer 1 draws the measured graphic data only for the latest molding cycle. In addition, the scale of the graph is displayed because it is set and created by the display processing unit 13 of the microcomputer 1 in the automatic scale mode. Then, when the function key corresponding to “one time / overwrite” is pushed in this state, the display of “= 1 write” is switched to “= overwrite”, and the display processing unit 13 enters the overwrite mode, and the actual measurement is performed. The graphic data is displayed overwritten over a plurality of molding cycles including the latest molding cycle.

When the function key corresponding to "scale mode" is pushed in the state of FIG. 2, the display of "= automatic" is switched to "= setting", and the display processing unit 13 of the microcomputer 1 enters the scale setting accepting state. (In a state where the above-described scale setting instruction signal S2 is input). In this state, for example, an item to be enlarged / reduced is selected with another function key, and then the horizontal axis and the vertical axis are operated as described above by operating the ten keys. The minimum and maximum values of the axis (Xmim,
When Xmax) and (Ymim, Ymax) are sequentially input, the graph scale generation unit 15 determines the minimum value of the horizontal axis in the graph display frame area based on the scale set value by the operator.
Let the maximum value be (Xmim, Xmax) and the minimum value on the vertical axis,
Assuming that the maximum value is (Ymim, Ymax), a graph graduation grid is created in the graph display frame area 21 so that graduation values are well-divided, and a graduation value corresponding to this is created, and the display image data is displayed. It is sent to the generation unit 17. In addition, the data conversion processing unit 14 performs an enlargement / enlargement corresponding to the graph scale grid and the scale value in the graph scale generation unit 15.
The line drawing graph data of the designated item is created at the reduction rate, and the line drawing graph data within a range that fits within the graph display frame area 21 is extracted therefrom, and the display image data generation unit 1
7 Therefore, the scale is generated at an enlargement / reduction ratio corresponding to the scale designated by the operator, and a graph is drawn accordingly.

FIG. 4 shows a case where back pressure is selected as an item to be enlarged in the state of FIG. 2, and the minimum and maximum values on the horizontal and vertical axes are (20, 30) and (70, 80), respectively. 5 shows an enlarged image. In this way, the operator can enlarge (or reduce) the graph of any item by a simple operation.
Therefore, the observation of the graph data on a desired scale can be easily performed.

As described above, if only the scale setting instruction signal S2 is kept input, a fixed scale mode is set, and the current scale is fixed. Graphs and measured data graphs under different operation setting conditions can be displayed simultaneously on a fixed graph scale grid and compared.

While the graphic image of the charge process has been described above as an example, in the present embodiment, the display of graphic images of other processes can be processed in the same manner. For example, FIG. 5 shows the charge stroke graphic image of the latest molding cycle called on the display screen of the display device 5 in the automatic scale mode when the operator designates the display of the graphic image of the injection stroke. In the same figure, the right half of the horizontal axis increases the position of the screw (the forward stroke of the screw in the primary injection stroke from the measurement completion point at the right end to the center pressure switching point) to the right with the screw advance limit set to 0. In the left half of the horizontal axis, the time (the pressure-holding stroke time from the time of the pressure-holding switching to the time of the completion of the pressure-holding) is shown by increasing the pressure-holding switching point to 0 and increasing to the left. Are shown below. Also, the vertical axis shows the injection pressure on the left side in the figure, the numerical value indicating the scale of this is shown on the left side of the figure, the right side shows the injection speed in the figure on the vertical axis, Numerical values indicating the scale are shown on the right side of FIG. In the same figure, 31 is the actual measurement data of the injection speed,
Numeral 32 indicates actual measurement data of injection pressure, numeral 33 indicates setting data of injection speed, and numeral 34 indicates setting data of injection pressure. Here, in FIG. 5, the graph display frame area 21A includes a graph display frame area 21A for the primary injection stroke and a graph display frame area 21B for the dwelling stroke.
The scale is created in the automatic graph mode separately in each of the areas 21A and 21B. Although not shown any more in order to avoid redundancy, in the present embodiment, graphic images of the mold opening / closing process, graphic images of the eject process, and the like can be similarly displayed.

[0029]

As described above, according to the present invention, reading of numerical values from graphic display data on a display screen is easy and reliable, and a plurality of items of graphic data can be stored in one graph display frame area. When displaying images at the same time, it is possible to provide an easy-to-use graphic image display method in an easy-to-use injection molding machine with easy and reliable reading of numerical values from graphic display data and overall excellent visibility.

[Brief description of the drawings]

FIG. 1 is a simplified block diagram of a control system of an injection molding machine according to one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of a graphic image in an automatic scale mode of a charging process according to an embodiment of the present invention.

FIG. 3 is an enlarged view of a main part of a graph scale grid according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing an example of an enlarged graphic image according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an example of a graphic image in an automatic scale mode of an injection stroke according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 microcomputer (microcomputer) 2 sensor group 3 driver group 4 key input device 5 display device 10 molding condition setting storage unit 11 molding process control unit 12 measured value storage unit 13 display processing unit 14 data conversion processing unit 15 graph scale generation unit 16 Display fixed data storage unit 17 Display image data generation unit

Claims (1)

[Claims] 1. A microcomputer for driving and controlling each part of the machine based on each set operation condition value and measurement information from each sensor, wherein the microcomputer performs a charging process according to a predetermined molding operation program. , A series of molding operation steps such as a mold opening / closing step, an injection step, an eject step, and the like, and fetching and storing actual measurement data of each operation condition during operation. In an injection molding machine that performs a conversion process on the operating condition values or the actual measurement data taken in and displays a graphic image of the set data or the actual measurement data on a display device attached to the machine, the microcomputer is in an automatic scale mode. Group for the graphic image indicated to be displayed And maximum Fudeta, preset cut (separated)
By comparing the graph full-scale value group consisting of good numerical values, the minimum graph full-scale value in which the graph data for display fits is determined, and the graph display frame area is determined based on the determined graph full-scale value. A graph scale grid is created and a scale numerical value is created, and the setting data graph or the actually measured data graph is displayed in the graph display frame area, and the plurality of items are set in the graph display frame area. When simultaneously displaying the data graph or the actually measured data graph, the horizontal grid of the graph scale grid that divides the vertical axis is automatically selected so that the number of common divisions that can be commonly cut (separated) for each item is good. A method for displaying a graphic image in an injection molding machine, characterized in that the method is as described above.