JP3967655B2 - Display device for injection molding machine and injection molding machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display device, and more particularly to a display device for displaying a waveform of molding data of an injection molding machine.
[0002]
[Prior art]
Generally, in an injection molding machine, various parts including pressure sensors are provided in each part, detection signals from these sensors are acquired as molding data, and the acquired molding data is used for determining molding conditions and checking molding operations. Has been done. In order to make the use of the molding data easier, the molding data is displayed as a waveform (graph) on the screen of the display.
[0003]
A display device of a conventional injection molding machine includes, for example, a sensor group, an input unit, a microcomputer, and a display unit as described in Patent Document 1, and is any one of a metering process, an injection process, and a mold opening / closing process. The molding data in the selected process is displayed by selecting one.
[0004]
[Patent Document 1]
JP-A-5-42575.
[0005]
[Problems to be solved by the invention]
Since the waveform display of the molding data makes it possible to instantaneously determine whether or not the injection molding state is good, it is very convenient when the injection molding machine is operated continuously.
[0006]
By the way, a plurality of processes in injection molding are not independent of each other but are related to each other. For this reason, if the molding data for a plurality of processes (for example, two consecutive processes) can be simultaneously displayed on the screen of the display device, it is more convenient because the causal relationship can be grasped.
[0007]
However, the display device of a conventional injection molding machine can display only molding data at a predetermined drawing start timing on the screen of the display. Accordingly, there is a problem that the display device of the conventional injection molding machine cannot simultaneously display the molding data of two or more processes related to each other.
[0008]
The present invention has been made in view of the above points, and has a plurality of display areas on the screen of the display, and an injection molding machine display that can perform waveform display of molding data independently for each area. An object is to provide an apparatus.
[0009]
[Means for Solving the Problems]
According to the present invention, a display device of an injection molding machine for displaying the molding data detected by a plurality of sensors provided in each part of the injection molding machine and / or the molding data inside the controller on the screen of the display. A first storage unit for storing the molding data, an input unit for inputting instructions from an operator, and a program for defining a plurality of display areas independent from each other on the screen of the display A program for associating the selected molding data to be displayed on each of the plurality of display areas based on an instruction from the input unit, and an association for each of the plurality of display areas based on an instruction from the input unit Display start timing to display the formed molding data At the display start timing selected on the screen A second storage unit for storing a program for changing, and a program for displaying the molding data associated with each of the plurality of display areas based on an instruction from the input unit; and the second storage A display control unit that executes a program stored in the unit, and can simultaneously display the molding data in the plurality of display areas independently of each other, and for one molding data In response to different processes Provided is a display device for an injection molding machine characterized in that a plurality of display start timings can be set.
[0010]
Moreover, according to this invention, the injection molding machine provided with the above-mentioned display apparatus is provided.
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
FIG. 1 is a block diagram of a display device according to an embodiment of the present invention. The display device includes a molding data memory 11 included in a controller 10 that controls driving of the injection molding machine, a display control unit 12 and a program memory 13, and an input unit provided in a control panel of the injection molding machine. 14 and a display unit 15.
[0012]
The molding data memory 11 sequentially stores molding data output from a plurality of sensors (sensor groups) 16 provided in each part of the injection molding machine and molding data inside the controller 10. The molding data inside the controller 10 is, for example, processed molding data obtained by processing the molding data from the sensor 16 or set molding data (set molding data input and set from the input unit 14). Etc. Further, the molding data memory 11 stores a part of the molding data as a separate file in accordance with an instruction from the input unit 14.
[0013]
The display control unit 12 executes the program stored in the program memory 13, thereby causing the display 15 to display the molding data stored in the molding data memory 11 in a waveform (graph).
[0014]
The program memory 13 stores a program necessary for causing the display 15 to display the molding data in a waveform. The program stored in the program memory 13 is a program for defining a plurality of display areas independent from each other on the screen of the display 15, and is stored in the molding data memory 11 in each display area in accordance with instructions from the input unit 14. A program for arbitrarily associating the molding data, a program for setting display start timing for displaying molding data associated with each display area according to an instruction from the input unit 14, and each display area according to an instruction from the input unit 14 A program for setting the measurement time scale, a program for setting the X-axis and Y-axis items (data names) of each display area according to instructions from the input unit 14, and each display area according to instructions from the input unit 14 From the input unit and the program for switching the display method to overwritten display or update display Instruction is a program or the like for displaying the molding data that is associated with each display region in accordance with.
[0015]
The input unit 14 is a key switch, a touch panel interface, a keyboard, a mouse, or the like, and can give an instruction to the display control unit 12 according to the content displayed on the display unit 15.
[0016]
The display 15 is a CRT, LCD, or the like, and displays control data on the screen under the control of the display control unit 12.
[0017]
The sensor group 16 includes a plurality of types of sensors such as pressure sensors and position sensors. Since these sensors are well known from the past, their description will be omitted.
[0018]
Next, the operation of the display device of FIG. 1 will be described.
[0019]
When the injection molding machine executes an injection operation under the control of the controller 10, each sensor of the sensor group 16 detects a detection target and outputs molding data. Molding data sent from the sensor group 16 is sequentially stored in the molding data memory 11 for each sensor. The molding data memory 11 stores molding data from each sensor for a predetermined time (may differ for each sensor (each process)). Further, molding data inside the controller 10 is also stored in the molding data memory 11.
[0020]
When a waveform display request is input from the input unit 14, the display control unit 12 reads out and executes a program for defining a plurality of display areas from the program memory 13, and includes two upper and lower waveform display areas that are independent from each other. A waveform display image is displayed on the screen of the display 15.
[0021]
An example of a waveform display image displayed on the screen of the display 15 is shown in FIG. FIG. 2 is based on an initial setting that is set in advance, and the display image varies depending on the state of the initial setting.
[0022]
As shown in FIG. 2, a cursor frame row 21 arranged in two vertical columns is on the left side of the screen, and a waveform display region 22 is on the right side thereof. The waveform display area 22 is divided into two upper and lower stages. In addition, several buttons 23 are displayed on the lower side of the screen.
[0023]
In the left column of the cursor frame column 21, a common cursor frame is arranged in both the upper and lower waveform display areas. A small window 24 provided in each cursor frame indicates whether or not a function assigned to the cursor frame is valid. That is, no hatching indicates validity, and hatching indicates invalidity. The “ON / OFF” cursor frame is for determining whether or not to accept an operation from the input unit 14 for this screen. The “overlapping 1” and “overlapping 2” cursor frames display the molding data continuously (overwrite) or only once (overwrite) for each of the upper and lower waveform display areas. It is for deciding whether or not. The “grid” cursor frame is used to determine whether or not to display a dashed grid in the waveform display area. The “cursor” cursor frame is for determining whether or not to display a cursor that can be operated from the mouse or the like of the input unit 14. The “unit display” cursor frame is for determining whether or not to display units corresponding to the X axis (horizontal axis) and the Y axis (vertical axis) of the waveform display area. The “Time → Pos.” Cursor frame is for determining whether or not to convert the time axis into the position axis. The “Save” cursor frame is used to determine whether or not to save the waveform data displayed in the waveform display area 22.
[0024]
A cursor frame for setting items (channels) to be displayed in the waveform display area 22 is arranged in the right column of the cursor frame column 21. In the present embodiment, there are 8 channels that can be displayed in the waveform display area 22, the first to fourth channels correspond to the upper waveform display area, and the fifth to eighth channels correspond to the lower waveform display area. Corresponding to
[0025]
After the waveform display image is displayed on the screen of the display unit 15, when the “waveform display” button on the lower side of the screen is pressed by an input operation from the input unit 14, the display control unit 12 displays in the program memory 13. A program for displaying the stored molding data is called and executed. That is, when detecting that the “waveform display” button displayed on the screen is pressed, the display control unit 12 reads the molding data sequentially stored in the molding data memory 11 according to the setting content at that time, The waveform is displayed in the waveform display area 22.
[0026]
Next, the operation when changing the setting item will be described. The same applies to the initial setting.
[0027]
First, when the waveform display image is displayed on the display unit 15, a cursor frame of an item to be set is designated by an operation from the input unit 14. For example, when the cursor frame 33 of the first channel is designated, the display control unit 12 reads a program for setting the Y axis (vertical axis) including a program for associating a plurality of molding data with each waveform display area from the program memory and executes the program. To do. Then, the screen of the display 15 becomes as shown in FIG. That is, the window 31 corresponding to the first channel is opened.
[0028]
Next, when the waveform display selection button 32 (“1. speed setting”) in the opened window 31 is pressed, a selection window 41 is further opened as shown in FIG. By pressing any button in the selection window 41, an item corresponding to the first channel is determined.
[0029]
Returning to FIG. 3 again, the window 31 corresponding to the first channel includes a “100” button and a “−100” button for determining the Y-axis scale. This represents a display scale in the waveform display area. When these buttons are pressed, a numerical value input window is opened and an arbitrary number can be input. It can also be changed by pressing the “Δ” button or the “▽” button on the left side of these buttons. When these buttons are set to “100” and “−100”, the center of the Y axis of each waveform display area is at the “0” level. Further, when “200” and “0” are set, the lower end of the Y-axis is at the “0” level at the same scale as when “100” and “−100” are set.
[0030]
The window 31 corresponding to the first channel has a monitor waveform display button and a call waveform display button, one of which is “ON” and the other is “OFF”. When the monitor waveform display button is “ON”, the molding data is displayed in real time (once recorded in the molding data memory and immediately read out) in the waveform display area. When the call waveform display button is “ON”, the file selection window is opened and the shaping data or setting data of the designated file is displayed in the waveform display area.
[0031]
When the cursor frame of the first channel is designated again from the state of FIG. 3, the state returns to the state of FIG. However, molding data is not displayed in the waveform display area.
[0032]
Next, when the “X-axis setting” button (see FIG. 2) on the lower side of the screen is pressed, the display control unit 12 includes an X-axis (horizontal axis) setting program including a program for setting the display start timing. Is read from the program memory 13 and executed. Then, a waveform drawing trigger setting window 51 is opened on the screen of the display 15 as shown in FIG. There is one waveform drawing trigger setting window 51 corresponding to each of the upper and lower waveform display areas.
[0033]
When the total time button 1 (or total time button 2) for determining the X axis is pressed in the state of FIG. 5, a time selection window 61 is opened as shown in FIG. By pressing a selection button in the time selection window 61, the time corresponding to the total time button 1 (or total time button 2) can be changed. The total time buttons 1 and 2 correspond to the lengths after the “TRIG” point on the Y axis of the upper and lower waveform display areas, respectively.
[0034]
In the state of FIG. When the 1 button (or the Trig. 2 button) is pressed, the trigger selection window 71 is opened as shown in FIG. By pressing a selection button in the trigger selection window 71, the display start timing can be changed. Note that the display start timing is determined by using the output change (waveform trigger) of the sensor associated with each selection button in the trigger selection window 71. Furthermore, when the X-axis 1 button (or X-axis 2 button) is pressed in the state of FIG. 5, an X-axis selection window 81 is opened as shown in FIG. Then, by pressing a selection button in the X axis selection window 81, the X axis can be used as a time axis or a position (distance) axis from a certain reference position.
[0035]
As described above, in the display device of the present embodiment, the X-axis and Y-axis items, the scale, the display start timing, and the like can be freely changed independently for each of the upper and lower waveform display areas. it can. As a result, different molding data can be displayed on the same screen in the two waveform display areas. For example, in the case of FIG. 2, the molding data during the filling operation is displayed on the upper side, and the molding data during the mold closing operation is displayed on the lower side.
[0036]
In the above embodiment, the case where the number of waveform display areas is two has been described. However, the number may be three or more. In the above embodiment, the case where a maximum of four waveforms can be displayed in each waveform display area has been described. However, a larger number of waveforms can be displayed.
[0037]
As described above, in the display device according to the present embodiment, molding data in different processes can be displayed on the same screen, so that it is easy to check where the variation has occurred during molding and to grasp the state of the molding machine.
[0038]
In addition, since the items and scales of each axis in the two waveform display areas can be changed independently, the molding data of the process that ends in a relatively short time, such as the filling process, is compared with the weighing process and the entire process of one cycle. Even when molding data for a process that requires a long time is displayed on the same screen, molding data for a process that requires a relatively long time is displayed on one screen, and the injection process is displayed on the other screen. By displaying the molding data of a comparatively short time, it is possible to grasp in detail the state of the molding machine in the process of a relatively short time.
[0039]
Furthermore, in the display device of the present embodiment, the same waveform data can be displayed in two waveform display areas with one setting for overwriting and the other setting not for overwriting. It is possible to see only the latest one-time waveform data while observing the change of the state, that is, the stability of molding.
[0040]
In addition, the influence of other processes can be grasped when the molding conditions are determined or changed.
[0041]
Further, in the display device of the present embodiment, since a plurality of waveform display areas can be displayed at a time, the necessity of switching the screen is reduced, and the state of the injection molding machine can be grasped efficiently.
[0042]
Further, in the display device of the present embodiment, since the items of the X axis and the Y axis can be arbitrarily changed, the waveform data is collected but the waveform display is not performed but the importance is low or used. Waveforms can be easily displayed even for infrequent molding data, and the influence of molding conditions on each process in other processes can be easily grasped.
[0043]
From the above, in the display device of the present embodiment, the state of the injection molding machine can be grasped in a short time, and the time required for determining the molding conditions can be shortened.
[0044]
Next, an outline of an injection molding machine provided with a display device according to an embodiment of the present invention will be described with reference to FIG. FIG. 9 is a cross-sectional view showing the overall configuration of an injection molding machine provided with a display device according to an embodiment of the present invention.
[0045]
An injection molding machine 90 shown in FIG. 9 is a so-called in-line type injection molding machine among screw type injection molding machines, but the present invention is an injection molding machine employing other methods such as a pre-plastic injection molding machine. Is also applicable.
[0046]
The injection molding machine 90 includes a fixed platen 91 and a movable platen 92, and a mold is attached to each of the fixed platen 91 and the movable platen 92. The movable platen 92 can be moved relative to the fixed platen by a mold clamping device 93, and the mold is opened and closed by moving the movable platen 92. On the opposite side of the movable platen 92 with respect to the fixed platen 91, an injection device 94 for filling the mold with resin is disposed. The injection device 94 measures the resin heated and melted by the screw 96 that moves while rotating in the cylinder 95, and fills (injects) the measured resin into the mold.
[0047]
The entire injection molding machine 90 is covered with a cover (not shown), and a control panel 97 is attached to the cover. The control panel 97 is a part where an operator performs an input operation. The control panel 97 is provided with the input unit 14 and the display 15 shown in FIG. 1 and is connected to the controller 10.
[0048]
The controller 10 is provided with a molding data memory 11 for sequentially storing molding data output from sensors (sensor groups) 16 provided in each part of the injection molding machine and molding data inside the controller 10. The sensor group 16 includes, for example, a pressure detection load cell provided at the rear end of the screw 96, a sensor for detecting the rotation speed and position of the screw 26, and the like.
[0049]
Here, a combination of waveform display screens displayed by the display device according to the present embodiment will be described.
[0050]
According to the display device according to the present embodiment, two or more triggers can be set as described above. That is, waveforms in a plurality of steps can be displayed in parallel at the same time for one molding cycle. By displaying the waveform during setup to determine the molding conditions, the molding conditions can be adjusted quickly and easily, but the waveform display is not only during setup but also for the stability of molding during continuous molding. It is also effective when checking.
[0051]
That is, when the resin type or the resin lot is changed during continuous production of a resin molded product, the molding stability is often impaired. In such a case, the molding stability can be easily confirmed by changing and adjusting the molding conditions and simultaneously displaying the waveform on the display device.
[0052]
For example, if the set value of the resin back pressure acting on the screw is increased, the density of the resin accumulated in the cylinder increases, and even if the set value of the injection pressure in the resin injection process is the same, the detected value of the injection pressure is It gets bigger. As described above, when the back pressure setting of the molding condition is changed, the influence of the change of the molding condition on the molding operation affects not only the measurement process but also the operation of the injection process. Therefore, confirmation of molding stability is possible by referring to various waveforms at multiple process start triggers such as at the start of injection and at the start of weighing, which are generally important for confirming molding quality, and by displaying overprints. It can be done efficiently and quickly.
[0053]
The important items for confirming molding stability by waveform display are an injection speed detection waveform, a pressure holding detection waveform, and the like when the start of the injection process is used as a trigger. Further, when the start of the weighing process is used as a trigger, a screw rotation detection waveform, a resin back pressure detection waveform, a screw position detection waveform, and the like are important in the evaluation of molding stability.
[0054]
Here, the start of the injection process and the trigger means that the waveform from the start of the injection process (filling process start) is displayed in the display area. Similarly, using the start of the weighing process as a trigger means displaying a waveform from the start of the weighing process.
[0055]
The above-described injection speed detection waveform is a waveform indicating a detection value of the injection speed, and corresponds to a waveform indicating a detection value of the screw forward speed in an injection molding machine as shown in FIG. The above-mentioned holding pressure detection waveform is a pressure waveform when a pressure is applied to the resin after filling the mold and the resin is held for a certain period of time. In an injection molding machine as shown in FIG. It becomes a pressure detection waveform in the pressure-holding process obtained by pressurizing.
[0056]
The above-mentioned screw rotation detection waveform is a waveform indicating the rotation speed of a screw for filling molten resin into a cylinder with a screw in an injection molding machine as shown in FIG. The above-mentioned resin back pressure detection waveform is the reaction force of the resin applied to the screw when the molten resin is rotated and sent to the front of the screw in the injection molding machine as shown in FIG. The screw is retracted by this pressure. The above-described screw position detection waveform is a waveform indicating the position of the tip in the axial direction of the screw in the injection molding machine as shown in FIG.
[0057]
FIG. 10 is a diagram showing an example in which waveforms are displayed in two display areas by different triggers. In the example shown in FIG. 10, various waveforms when the injection process start is used as a trigger are displayed in the upper display area A, and various waveforms when the measurement process start is used as a trigger are displayed in the lower display area B. Is displayed. For example, while referring to the resin back pressure detection waveform in the lower display area B, it is easy to grasp how the change in the resin back pressure affects the injection pressure waveform shown in the upper display area A. Can do.
[0058]
As shown in FIG. 10, by arranging the display areas A and B in parallel on the screen in the vertical direction, the two display areas can be easily visually recognized, and the convenience for the operator is improved.
[0059]
FIG. 11 is a diagram showing an example in which the waveform displayed in FIG. 10 is overwritten. For example, if there is a variation in the injection pressure waveform shown in the upper display area A during continuous molding, the resin back pressure detection waveform is immediately displayed in the lower display area B as to whether or not it is due to the influence of the back pressure fluctuation. Can be confirmed.
[0060]
In the above example, the upper display area is set as the injection process start trigger, and the lower display area is set as the weighing process start trigger.Other timings that can be set as the trigger include mold closing start, ejector protrusion start, Various timings such as pressure holding start, mold opening start, ejector return start, and free mode (continuous drawing without trigger) can be set as triggers.
[0061]
In addition, as an example of displaying a plurality of display areas in parallel on the same screen, for example, various waveforms are displayed in the upper display area A with the start of the injection process as a trigger, and the start of the injection process in the lower display area B as a trigger. An example of displaying various waveforms by overwriting is given. Thus, while confirming the current (latest) waveform immediately after the setting value is changed with the waveform shown in the upper display area A, the change in the waveform after changing the setting value in the lower display area B is observed. be able to. Therefore, the molding stability after changing the set value can be easily confirmed.
[0062]
Furthermore, the upper display area A is set with the injection process start as a trigger to display a waveform centering on the injection process, and the lower display area B is similarly set with the injection process start as a trigger to perform one molding cycle. It is good also as a waveform display which shows all the processes. Thereby, the screen frequently used at the time of shaping | molding can be simultaneously displayed on the same screen, and the operation which switches a display screen can be abbreviate | omitted.
[0063]
Also, in a two-material molding machine or a two-color molding machine, the waveform for the F side (operation side) is set in the display area A with the start of the injection process as a trigger, and the waveform for the R side (counter operation side) is injected. The process start can be set as a trigger and displayed in the lower display area B. Thereby, the screen frequently used at the time of 2 material shaping | molding can be simultaneously displayed on the same screen, and the operation which switches a display screen can be abbreviate | omitted.
【The invention's effect】
According to the present invention, in the display device of the injection molding machine, a plurality of display areas are provided on the display screen, and the waveform of the molding data can be displayed independently for each area. The state of the molding machine can be easily grasped, and the time required for determining the molding conditions can be shortened.
[Brief description of the drawings]
FIG. 1 is a block diagram of a display device of an injection molding machine according to an embodiment of the present invention.
FIG. 2 is a diagram showing an example of a screen displayed on the display device of FIG. 1;
3 is a diagram showing an example of a screen displayed after channel 1 is selected on the screen of FIG.
4 is a diagram illustrating an example of a screen displayed after a display item button is pressed on the screen of FIG. 3;
5 is a diagram showing an example of a screen displayed after the X-axis setting button is pressed on the screen of FIG.
6 is a diagram showing an example of a screen displayed after pressing the total time button on the screen of FIG.
7 is a diagram showing an example of a screen displayed after a trigger selection button is pressed on the screen of FIG.
8 is a diagram showing an example of a screen displayed after the X-axis selection button is pressed on the screen of FIG.
FIG. 9 is a cross-sectional view showing the overall configuration of an injection molding machine provided with a display device according to an embodiment of the present invention.
FIG. 10 is a diagram showing an example in which waveforms are displayed in two display areas by different triggers.
11 is a diagram showing an example in which the waveform displayed in FIG. 10 is overwritten.
[Explanation of symbols]
10 Controller
11 Molding data memory
12 Display controller
13 Program memory
14 Input section
15 Display
16 sensors
21 Cursor frame row
22 Waveform display area
23 button
24 Small window
31 Window corresponding to the first channel
32 “1. Speed setting” button
33 First channel cursor frame
41 Selection window
51 Waveform drawing trigger setting window
61 Time selection window
71 Trigger selection window
81 X-axis selection window
90 Injection molding machine
91 Fixed platen
92 Movable platen
93 Clamping device
94 Injection equipment
95 cylinders
96 screw
97 Control panel

Claims (7)

In the display device of the injection molding machine for displaying the molding data detected by a plurality of sensors provided in each part of the injection molding machine and / or the molding data inside the controller on the display screen,
A first storage unit for storing the molding data;
An input unit for inputting instructions from the operator;
A program for defining a plurality of display areas independent from each other on the screen of the display, for associating so as to display the molding data selected in each of the plurality of display areas based on an instruction from the input unit A program for changing a display start timing for displaying the molding data associated with each of the plurality of display areas to a display start timing selected on the screen based on an instruction from the input unit; and A second storage unit that stores a program for displaying the molding data associated with each of the plurality of display areas based on an instruction from the input unit;
A display control unit that executes a program stored in the second storage unit,
Injection molding, wherein the molding data can be simultaneously displayed independently of each other in the plurality of display areas, and a plurality of display start timings can be set corresponding to different processes for one molding data. Machine display device.   The second storage unit further stores a program for setting a measurement time scale or a measurement distance scale for each of the plurality of display areas based on an instruction from the input unit. A display device for an injection molding machine according to 1.   The second storage unit further stores a program for setting items of an X axis and a Y axis for each of the plurality of display areas based on an instruction from the input unit. 3. A display device for an injection molding machine according to 2.   The second storage unit further stores a program for switching overwriting display and update display for each of the plurality of display areas based on an instruction from the input unit. The display apparatus of the injection molding machine as described in any one of 1 thru | or 3.   The plurality of display areas include a first display area for displaying an injection speed detection waveform or a pressure detection waveform from the injection process start time, a screw rotation detection waveform, a resin back pressure detection waveform, and a screw position from the measurement process start time. 5. A second display screen for displaying any one of the detected waveforms, and the first and second display areas are set on the same screen of the display. The display apparatus of the injection molding machine as described in any one of these.   6. The display device for an injection molding machine according to claim 5, wherein the first and second display areas are arranged in parallel vertically on the same screen of the display.   An injection molding machine comprising the display device according to any one of claims 1 to 6.

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