JPH0542574A - Method for displaying graphic image in injection molding machine - Google Patents

Abstract

PURPOSE:To provide a method for displaying a graphic image with overall excellent visibility and good convenience to use in an injection molding machine wherein an automatic scale setting wherein reading of values from a graphic display data on a displayed figure is easy is possible and setting of a scale by an arbitrary rate of expansion/contraction based on an operator is also possible. CONSTITUTION:A display treating part 13 of a microcomputer 1 prepares a graphic image by an automatic scale mode in such a way that a graph is shown by a convenient full scale value and a convenient scale corresponding it and when an operator designates the min. value and the max. value of the scale, scale setting and graph display by a corresponding rate of expansion/contraction are performed.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Recent microcomputer-controlled injection molding machines are equipped with a display device such as a color CRT display or a color LCD display, and this display device sets or confirms molding operation conditions for automatic molding operation. Various setting condition display mode images for displaying, various actual measurement data display mode images for displaying actual measurement data of many measurement items during automatic molding operation, automatic inspection items are displayed at regular inspection time A regular inspection mode image for prompting, an alarm mode image for recognizing this when an abnormality occurs, and the like are displayed.

By the way, conventionally, the image displayed in the above-mentioned measured data display mode is often shown by enumerating numbers, which makes it difficult to grasp the driving characteristics such as the injection stroke at a glance. .. 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 the injection stroke together with set values in a graphic image on a display screen, and proposed it as Japanese Patent Laid-Open No. 26726/1990. ..

[0004]

In the above-mentioned prior application, however, the maximum value of the data displayed graphically is automatically set and displayed on the display screen as the maximum value of the graph scale (graph full scale value). The measured data is displayed graphically on all sides of the graph display frame area on the screen, and the maximum value of the data displayed graphically is divided into, for example, 10 to generate a graph scale grid and scale numbers. It was supposed to be displayed. For this reason, for example, when the maximum value of the data displayed graphically is a good numerical value such as 10, 12, 16 ..., The graph scale grid and the scale numbers are well separated, but in such a case it is rare. Therefore, the maximum value of the displayed data is usually a poorly-cut number such as 89.1, so the graph scale grid and scale numbers are also hard-to-cut, and the graphic display data on the display screen It has been pointed out that there is a problem that it is difficult to read the value directly. Further, conventionally, since the operator (user) cannot set the scale at a desired enlargement / reduction ratio, it is not possible to enlarge a part of the graphic display image and confirm the details of the main part with good visibility. It was also desired to have an arbitrary scale setting function by such an operator.

The present invention has been made in view of the above points,
The purpose is to enable automatic scale setting that makes it easy to read the value from the graphic display data on the display screen, and also to set the scale at any enlargement / reduction rate as desired by the operator. An object of the present invention is to provide a method of displaying a graphic image in an injection molding machine which is excellent in visibility and is easy to use.

[0006]

In order to achieve the above-mentioned object, the present invention comprises a microcomputer for driving and controlling each part of a machine on the basis of each set operating condition value and measurement information from each sensor. The microcomputer executes a series of molding operation strokes such as a charging stroke, a mold opening / closing stroke, an injection stroke, and an ejection stroke according to a predetermined molding operation program, and stores and stores actual measurement data of each operating condition during operation, Further, the microcomputer performs an conversion process on the set operating condition value or the fetched actual measurement data according to an operator's instruction and displays a graphic image of the setting data or the actual measurement data on a display device attached to the machine. In the method of displaying a graphic image, the microcomputer is for displaying the graphic image By comparing the maximum value of the graph data and a graph full-scale value group consisting of preset preset numbers (breaks), the minimum graph full-scale value in which the graph data for this display fits is determined, Create a graph scale grid in the graph display frame area based on the determined graph full-scale value, create a scale value, and display the setting data graph or actual measurement data graph in the graph display frame area. Will be done
Alternatively, the microcomputer creates a graph scale grid in the graph display frame area based on an operator's scale setting instruction and creates a scale value, and displays the graph at the enlargement / reduction rate corresponding to the set scale. In the frame area, the set data graph or the actually measured data graph in a range that fits in the graph display frame area is displayed.

[0007]

[Function] The microcomputer that controls the entire machine can capture all the actual measurement data of preset monitor items during automatic operation over a continuous predetermined number of shots and rewrite this into a predetermined storage area. Store.
When one of the actual measurement data display mode images desired by the operator, for example, the display of the graphic image of the charging process is selected in the automatic scale mode, the display processing unit in the microcomputer displays the image based on a predetermined image generation program. The maximum value of the graph data and the graph full-scale value group consisting of preset preset numerical values are compared to determine the minimum graph full-scale value in which the graph data for display fits. Then, based on the determined graph full-scale value, create a graph scale grid in the graph display frame area, create scale values, draw and synthesize the measured data graph in the graph display frame area, It is displayed on a display device such as a color CRT display. Further, in this state, when the operator selects the scale setting mode and inputs the minimum value and the maximum value on the horizontal axis and the vertical axis, respectively, the display processing unit in the microcomputer displays a graph based on a predetermined image generation program. In the display frame area, create a graph scale grid according to the operator's scale setting instruction, create scale values, and expand the scale corresponding to the set scale in the graph display frame area. The measured data graph or the measured data graph within a range that fits in the display frame area is drawn / combined and displayed on the display device of the machine.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An 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 an injection molding machine according to this embodiment. In FIG. 1, 1 is a microcomputer that controls the operation and display control of the entire machine (injection molding machine), 2 is a sensor group including a large number of sensors provided in each part of the machine, and 3 is each part of the machine. A driver group composed of a large number of driver circuits for driving and controlling a large number of drive sources provided, 4 is a key input device arranged on the front face of the machine, and 5 is a device arranged 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, eject operation, calculation / storing processing of measured data, calculation processing / determination processing such as non-defective / defective product determination processing, abnormality determination processing, or the display device 5 Various processes such as output image display control process are executed. This microcomputer 1 actually has various I
/ O interface, ROM, RAM, CPU, etc., and executes various processes by various programs created in advance. In the present embodiment, the molding condition setting storage unit 10 and the molding process control unit 11 are executed. , The measured value storage unit 12, the display processing unit 13 and the like,
The following will be described. The display processing unit 13 is provided with a data conversion processing unit 14, a graph scale generation unit 15, a fixed display data storage unit 16, a display image data generation unit 17, and the like.

The molding condition setting storage unit 10 stores various operating condition values input by the key input device 4 in a rewritable form. The operating condition values include, for example, tightening force, electric power value, relationship between screw position and screw rotation speed during charge stroke, screw retreat speed, and back pressure, suck back control condition, 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 holding pressure end time, band heater temperature of each part, mold closing (mold clamping) ) Stroke and speed control conditions and mold clamping force, mold opening stroke and speed control conditions, eject control conditions, control conditions for the automatic product take-out machine, and the like.

The molding process control unit 11 is based on a molding process control program created in advance and setting condition values stored in the molding condition setting storage unit 10, and the sensor group 2 arranged in each part of the machine. Through the driver group 3 (motor driver, hydraulic cylinder driver, heater driver, etc.) while referring to measurement information from (position sensor, pressure sensor, temperature sensor, etc.) and timing information from a clock built in itself. The corresponding drive source is drive-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 / back pressure detection sensor, and a mold opening / closing stroke detection sensor. , A mold clamping pressure detection sensor, a mold internal pressure detection sensor, an eject protrusion / return stroke detection sensor, an eject cylinder pressure detection sensor, an operation confirmation sensor of a product automatic take-out machine, a temperature sensor of each part, a power value detection sensor, and the like.

All the actual measurement data of preset monitor items during continuous automatic operation are stored in the actual measurement value storage unit 12 over a continuous predetermined number of shots. The monitor items that are taken in include time monitoring items, position monitoring items, rotation speed monitoring items, speed monitoring items, pressure monitoring items, temperature monitoring items, power monitoring items, and other important items of the molding operation condition setting items described above. Are almost overlapping. The speed measurement value is calculated in real time by an arithmetic processing unit (not shown) in the microcomputer 1 based on the measurement information and the clock information from each of the stroke (position) detection sensors described above, and this is measured value storage unit 12 Is stored in a predetermined area.

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

In this embodiment, the system is adapted to select the automatic scale mode when the graphic image is initially called, and the automatic scale instruction signal S1 is inputted to the graph scale generator 15.
At this time, the graph scale generation unit 15 causes the maximum values of the horizontal axis and the vertical axis of the graph data of the items instructed to be displayed, which are fetched from the data conversion processing unit 14, and the preset (break) for each item. By comparing the horizontal axis and the vertical axis graph full-scale value group consisting of good numerical values, respectively, determine the minimum graph full-scale value that the graph data for this display fits on the horizontal axis and vertical axis,
Based on the determined graph full-scale value, a graph scale grid is created in the graph display frame area, and a scale value is created. For example, regarding the graphic image of the charge process, 10, 12, 16, 20, 24, 30, 3 are set as the graph full-scale value group on the horizontal axis.
2, 40, 50, 60, 80 and numerical values obtained by multiplying them by a power of 10 or a power of 1/10 are prepared. Also, as a graph full scale value group on the vertical axis, 1
0, 16, 20, 40, 50, 80, and 10 of these
A value obtained by multiplying the power of 1 or the power of 1/10 is prepared. Therefore, for example, the total stroke value (total screw retraction distance), which is the horizontal axis data of the charging process, is 78 mm.
Is 80 (m as the graph full-scale value on the horizontal axis.
m) 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 vertical axis graph full scale value. The graph scale generation unit 15 then uses the graph full-scale values on the horizontal axis and the vertical axis determined in this way within the predetermined frame area for graph display (21 in FIG. 2). In addition, a graph scale grid (2 in FIG. 2) is also provided so that this is also a predetermined number of divisions (eg, equal number of divisions of 4, 5, 8, 10, 20, etc.).
2) is created by dot display, and the scale value 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) divided by dots so that the unit grid also has a good division number (for example, 4, 5, 10). It should be noted that the sharp graph full-scale value group described above and the equally-divided number of sharp cuts for the corresponding graph scale grid can be set arbitrarily, taking both visibility and the burden of software construction into consideration. And set it appropriately.

On the other hand, when the scale setting instruction signal S2 arrives at the graph scale generation unit 15 by the key operation of the operator, the display processing unit 13 enters the scale setting mode (scale setting mode by the 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 most recently created by the graph scale generating unit 15 is generated. 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 such a scale setting mode, the operator designates a desired graphic display item, and a scale instruction signal for designating the enlargement / reduction ratio for this graphic display item, that is, the horizontal axis and the vertical axis. Minimum value, maximum value [(Xmi
m, Xmax), (Ymim, Ymax)], the graph scale generation unit 15 sets the minimum and maximum values of the horizontal axis in the graph display frame area to (Xmim, Xmax) based on the scale setting value by the operator. ), And the minimum and maximum values on the vertical axis are (Ymim, Ymax), and a graph scale grid is created so that the scale values are well separated in the frame area for graph display, and the scale values corresponding to this are also created. To create.

Further, 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 the data to be placed on the graph scale grid. Is converted into an enlargement / reduction ratio according to this graph scale to obtain line drawing data.

The generation processing data of the data conversion processing unit 14 and the graph scale generation unit 15 are taken into the display image data generation unit 17, and the graph scale is placed at a predetermined position on the graph scale grid image data of a predetermined magnification. The graphic image data is converted and converted into an enlargement / reduction ratio according to, and the graphic image data is overwritten and combined. Further, from a large number of characters, symbols, graphic figures, ruled line data, etc., which are fixed data for mode images, which have been created and stored in advance in the display fixed data storage unit 16, they are used for displaying the display mode image. Data is extracted,
This is taken in by the display image data generation unit 17 and is similarly synthesized as display image data. 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, etc. for a specified graphic display image.
Image data that has been combined and to which color classification information and the like have been added is created, and this is rewritably held. When the designated display mode is not a graphic image, the image data for the designated designated display image is also displayed by the data conversion processing unit 14 and the contents of the display fixed data storage unit 16. Generated and stored in 17.

The image data of the display image data generation unit 17 is transferred to a frame buffer (not shown) and temporarily stored therein, 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
The image data in the predetermined mode will be displayed on the display screen.

FIG. 2 shows a charge stroke graphic image of the latest molding cycle which is 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 stroke. In the figure, the horizontal axis indicates the screw position (screw retreat stroke), and the numerical value indicating the scale thereof is shown on the lower side. In the example of the charge stroke shown in FIG. 2, the total stroke of the screw (stroke from the injection completion position at the forward limit to the measurement completion point at the backward limit) is about 78 mm, and the full scale value on the horizontal axis of the display screen is 80 mm. The vertical grid lines of the graph scale grid 22 that divides the entire horizontal axis are generated by dividing 80 mm into 20 equal parts. Also, the graph display frame area 21
The vertical axis of the graph indicates the back pressure on the left side of the figure, and the numerical value indicating the scale thereof is shown on the left side of the figure. In the example of FIG. 2, the maximum measured back pressure is about 83. At 5 kgf, the full scale value on the vertical axis for back pressure is set to 100 kgf. Furthermore, the right side of the same figure on the vertical axis shows the number of revolutions of the screw and the retreat speed of the screw, and the numerical values showing these scales are stacked in two stages on the right side of the figure (upper speed is lower and lower speed is) In the example of FIG. 2, the measured maximum value of the screw rotation speed is about 42 rpm, and the full-scale value on the vertical axis for the rotation speed is set to 50 rpm. Is about 37.5m
The full-scale value of the vertical axis for reverse speed is 40 mm in m / s
/ S is set. In the example shown in FIG. 2, the vertical axis is 3
The graph scale generation unit 15 uses the horizontal grid line of the graph scale grid 22 that divides the vertical axis, because the graph scale generation unit 15 serves as an index indicating the values of two items (back pressure, rotation speed, speed) and has different full scale values. , The items are selected so that the number of divisions is the same, and the vertical axis is equally divided into 10. When the vertical axis serves as an index indicating the values of a plurality of items and the respective full-scale values are different, the number of divisions on the vertical axis may be uniquely equally divided into 10.

FIG. 3 is an enlarged view of a main part of the above-mentioned graph scale grid 22. Each unit scale grid line of the graph scale grid 22 has a good division number of the unit scale grid as shown in FIG. It is displayed in a dot-divided form. Here, the vertical and horizontal sides of the unit scale grid are 5
It is designed to be represented by one dot.

In FIG. 2, reference numeral 24 is the back pressure measurement data, 25 is the screw rotation speed measurement data, 26 is the screw retraction speed measurement data, and 27 is the back pressure setting data. Indicates the setting data of the screw rotation speed, respectively. Here, in the display screen of FIG. 2, the graph characteristic lines regarding pressure, speed, and rotation speed are displayed in different colors, and the scale numbers, units, and characters are unified in the same color according to the color classification. It is displayed so that the operator can recognize at a glance which graph characteristic line represents what (note that this color classification is the same for other graphic images. is there).

As described above, since the graphic image in the automatic scale mode is displayed with a sharp full scale value and a sharp scale corresponding to this, 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 the 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, “= 1 write” and “= automatic” are displayed. In this state, the microcomputer 1 draws the measured graphic data only for the latest molding 1 cycle. In addition, the graph scale is displayed because the display processing unit 13 of the microcomputer 1 sets and creates the scale in the automatic scale mode. Then, when the function key corresponding to “once / overlap” is pushed in this state, the display of “= once write” is switched to “= overwrite”, the display processing unit 13 enters the overwrite mode, and the actual measurement is performed. Graphic data is displayed overlaid over multiple molding cycles including the latest molding cycle.

When the function key corresponding to the "scale mode" is pushed in the state of FIG. 2, the display of "= automatic" is switched to "= set", and the display processing unit 13 of the microcomputer 1 is in the scale setting accepting state. (The above-mentioned scale setting instruction signal S2 is input), and in this state, select an item to be enlarged / reduced by, for example, another function key, and then use the numeric keypad to operate the horizontal axis and vertical axis as described above. The minimum and maximum values of the axis (Xmim,
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 setting value by the operator.
The maximum value is (Xmim, Xmax), and the minimum value on the vertical axis,
With the maximum value set to (Ymim, Ymax), a graph scale grid is created in the graph display frame area 21 so that the scale values are well separated, and a scale 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 expands / corresponds to the graph scale grid and scale value in the graph scale generation unit 15.
The line drawing graph data of the designated item is created at the reduction ratio, and the line drawing graph data within the range that fits in the graph display frame area 21 is extracted to display the image data for display unit 1.
Send to 7. Therefore, the scale is generated at the enlargement / reduction rate according to the scale instructed by the operator, and the graph is drawn accordingly.

In FIG. 4, when 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. The enlarged image is shown. In this way, the operator can easily enlarge (or reduce) the graph of any item with a simple operation.
Therefore, the graph data can be easily observed on a desired scale.

As described above, if the scale setting instruction signal S2 alone is kept input, the fixed scale mode is set, and the current scale is fixed. By doing so, the setting data of different operation setting conditions can be set. It is possible to display the graphs and the measured data graphs under different operation setting conditions simultaneously on a fixed graph scale grid for comparison.

Although the graphic image of the charging process has been described above as an example, display of graphic images of other processes can be similarly processed in this embodiment. 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 specifies the display of the graphic image of the injection stroke. In the figure, the right half of the horizontal axis is set so that the screw position (the forward stroke of the screw in the primary injection stroke from the right end measurement completion point to the central holding pressure switching point) is increased to the right with the screw forward limit set to 0. In the left half of the horizontal axis, the time (pressure-holding stroke time from the pressure-holding switching time to the pressure-holding completion time) is shown to increase to the left with the pressure-holding switching point set to 0. The numerical value indicating is shown on the lower side. Further, the vertical axis shows the injection pressure on the left side in the figure, and the numerical value showing the scale of this is shown on the left side of the figure, and the right side of the figure on the vertical axis shows the injection speed, Numerical values indicating the scale of this are shown on the right side of the figure. In the figure, 31 is the measured data of the injection speed,
Reference numeral 32 shows the measured data of the injection pressure, 33 shows the setting data of the injection speed, and 34 shows the setting data of the injection pressure. Here, in FIG. 5, the graph display frame area is a graph display frame area 21A for the primary injection stroke and a graph display frame area 21B for the pressure holding stroke.
The scale is created in the automatic graph mode separately for each of the areas 21A and 21B. Although not shown in the figure for avoiding redundancy, other graphic images such as the mold opening / closing process and the eject process graphic image can be similarly displayed graphically in this embodiment.

[0028]

As described above, according to the present invention, the scale can be set so that the value can be easily read from the graphic display data on the display screen, and the scale can be set at an arbitrary scale ratio desired by the operator. It is also possible to provide a method of displaying a graphic image on an injection molding machine which is excellent in visibility and is easy to use, and its value is enormous.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing an example of a graphic image in a charge stroke automatic scale mode 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]

 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 Fixed data storage for display 17 Display image data generator

Claims (5)

[Claims] 1. A microcomputer for driving and controlling each part of a machine based on each set operating condition value and measurement information from each sensor, wherein the microcomputer carries out a charging process in accordance with a predetermined molding operation program. , A mold opening / closing stroke, an injection stroke, an eject stroke, and the like, while performing a series of molding operation strokes, the measured data of each operation condition during operation is fetched and stored, and the microcomputer is set by the operator's instruction. In the injection molding machine that converts the operating condition value or the captured actual measurement data and displays the graphic image of the setting data or the actual measurement data on the display device attached to the machine, the microcomputer is instructed to display. The maximum value of the graph data for the graphic image, By comparing the graph full scale value group consisting of numeric values of the constant has been cut (separated), determines the minimum of the graph full scale value graph data for this display fit,
Based on the determined graph full scale value, create a graph scale grid in the graph display frame area and create a scale value, and display the setting data graph or the actual measurement data graph in the graph display frame area. A method for displaying a graphic image in an injection molding machine, characterized in that 2. The graph scale grid according to claim 1, wherein the graph scale grid created based on the determined graph full scale value is automatically set so as to have a sharp division number for the graph full scale value. A method of displaying a graphic image in an injection molding machine, characterized by the above. 3. The method for displaying a graphic image in an injection molding machine according to claim 2, wherein each unit grid of the graph scale grid is displayed in a dot-divided manner so that the number of divisions is good. 4. A microcomputer for driving and controlling each part of the machine based on each set operating condition value and measurement information from each sensor, wherein the microcomputer carries out a charging process in accordance with a predetermined molding operation program. , A mold opening / closing stroke, an injection stroke, an eject stroke, and the like, while performing a series of molding operation strokes, the measured data of each operation condition during operation is fetched and stored, and the microcomputer is set by the operator's instruction. In an injection molding machine that converts the operating condition value or the captured actual measurement data and displays a graphic image of the setting data or the actual measurement data on a display device attached to the machine, the microcomputer is a scale setting instruction of an operator. Based on, the graph scale grid in the graph display frame area At the same time as creating the scale values, the setting data graph or the actual measurement data graph within a range that fits in the graph display frame area is displayed in the graph display frame area at an enlargement / reduction rate corresponding to the set scale. A method for displaying a graphic image in an injection molding machine, characterized in that it is displayed. 5. The operator according to any one of claims 1 to 4, wherein the operator is instructed to fix the scale to fix the currently created graph scale grid and scale values, and set data graphs of different operation setting conditions and different operation setting conditions. A method for displaying a graphic image in an injection molding machine, characterized in that the measured data graphs can be simultaneously displayed on the fixed graph scale grid.