JP2003200456A - Injection molding machine and display thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the display of an injection molding machine which has a plurality of display areas on the scope of the display and can independently display the waveform of molding data every area. <P>SOLUTION: A program for regulating the display areas independent of each other on the scope of the display 15, a program for optionally relating the molding data to each display area based on the instruction from an input part 14, a program for setting display start timing for displaying the molding data related to each display area, and a program for displaying the molding data related to each display area, are stored in a program memory 13. The molding data stored in a molding data memory 11 are displayed on the display areas of the display independent of each other by a display control unit 12. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to a display device for displaying the molding data of an injection molding machine in a waveform.

[0002]

2. Description of the Related Art Generally, in an injection molding machine, various sensors such as a pressure sensor are provided in each part, and detection signals from these sensors are acquired as molding data, and the acquired molding data is used for determining molding conditions and molding operation. It is used for confirmation. Then, in order to more easily use the molding data, the molding data is displayed as a waveform (graph) on the screen of the display.

A conventional display device of an injection molding machine is, for example,
As described in Patent Document 1, a sensor group, an input unit, a microcomputer, and a display unit are selected, and any one of a weighing process, an injection process, and a mold opening / closing process is selected, and molding is performed in the selected process. It is configured to display data.

[0004]

[Patent Document 1] Japanese Patent Application Laid-Open No. 5-42575.

[0005]

The waveform display of the molding data makes it possible to instantly judge the quality of the injection molding state, which is very convenient when the injection molding machine is continuously operated.

By the way, a plurality of steps in injection molding are not independent of each other but are associated with each other. Therefore, if molding data for a plurality of processes (for example, two consecutive processes) can be simultaneously displayed on the screen of the display device, the causal relationship between them can be grasped, which is more convenient.

However, the display device of the conventional injection molding machine can display only molding data at a predetermined drawing start timing on the screen of the display device. Therefore, the conventional display device of the injection molding machine has a problem in that molding data of two or more processes related to each other cannot be displayed simultaneously.

The present invention has been made in view of the above points, and has an injection molding in which a plurality of display areas are provided on the screen of the display device and the waveform of molding data can be independently displayed for each area. An object is to provide a display device for a machine.

[0009]

According to the present invention, 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 is displayed as a waveform on the screen of the display. In a display device of an injection molding machine, the first storage unit for storing the molding data,
An input unit for inputting an instruction from an operator, a program for defining a plurality of display areas independent of each other on the screen of the display unit, in each of the plurality of display areas based on an instruction from the input unit A program for arbitrarily associating the molding data, a program for setting a display start timing for displaying the molding data associated with each of the plurality of display areas based on an instruction from the input unit, and the input 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 unit, and a program stored in the second storage unit. And a display control unit, wherein the molding data can be independently displayed in the plurality of display areas. Machine display device is provided.

Further, according to the present invention, there is provided an injection molding machine provided with the above-mentioned display device.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a block diagram of a display device according to an embodiment of the present invention. This display device includes a molding data memory 11, a display control unit 12 and a program memory 13 included in a controller 10 that controls the drive of an injection molding machine.
And an input unit 14 provided on the control panel of the injection molding machine.
And a display unit 15.

The molding data memory 11 includes a plurality of sensors (sensor group) 16 provided in each part of the injection molding machine.
The molding data output from the controller and the molding data inside the controller 10 are sequentially stored. As the molding data inside the controller 10, for example, processed molding data obtained by processing the molding data from the sensor 16 or set molding data (setting 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 another file according to an instruction from the input unit 14.

The display controller 12 includes a program memory 13
By executing the program stored in, the display 15 displays the molding data stored in the molding data memory 11 as a waveform (graph).

The program memory 13 stores a program necessary for displaying the molding data in waveform on the display 15. The program stored in the program memory 13 is a program for defining a plurality of display areas independent of each other on the screen of the display unit 15, and is stored in the molding data memory 11 in each display area according to an instruction from the input unit 14. A program for arbitrarily associating molding data, a program for setting a display start timing for displaying the 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 on the display, a program for setting the X-axis and Y-axis items (data names) of each display area according to the instruction from the input unit 14, and each display area according to the instruction from the input unit From the input program and the program to switch the display method of overwriting 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.

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 contents displayed on the display unit 15.

The display unit 15 is a CRT, LCD or the like,
The control data is displayed on the screen under the control of the display control unit 12.

The sensor group 16 includes a plurality of types of sensors such as a pressure sensor and a position sensor. Since these sensors are well known in the related art, description thereof will be omitted.

Next, the operation of the display device shown in FIG. 1 will be described.

When the injection molding machine performs an injection operation under the control of the controller 10, each sensor of the sensor group 16 detects each detection target and outputs molding data. The 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 be different for each sensor (each process)). Further, the molding data inside the controller 10 is also stored in the molding data memory 11.

When a waveform display request is input from the input unit 14, the display control unit 12 reads a program for defining a plurality of display areas from the program memory 13 and executes the program to display two upper and lower waveform displays independent of each other. The waveform display image including the area is displayed on the screen of the display unit 15.

FIG. 2 shows an example of the waveform display image displayed on the screen of the display unit 15. FIG. 2 is based on a preset initial setting, and the display image differs depending on the state of the initial setting.

As shown in FIG. 2, on the left side of the screen, vertical 2
There is a cursor frame row 21 arranged in a row, and a waveform display area 22 is on the right side thereof. The waveform display area 22 is divided into upper and lower stages. Also, some buttons 23 are displayed on the lower side of the screen.

On the left side of the cursor frame row 21, cursor frames common to both the upper and lower waveform display areas are arranged. The small window 24 provided in each cursor frame indicates whether or not the function assigned to the cursor frame is valid. That is, no hatching indicates valid, and hatching indicates invalid. The “ON / OFF” cursor frame is for determining whether or not to accept an operation from the input unit 14 on this screen. The “heavy writing 1” and “heavy writing 2” cursor frames continuously display (overwrite) molding data for each of the upper and lower waveform display areas, or perform only once (overwrite). Or not). The "grid" cursor frame is for determining whether or not to display a broken line grid in the waveform display area. The “cursor” cursor frame is for determining whether or not to display a cursor that can be operated by the mouse or the like of the input unit 14. The "unit display" cursor frame is for determining whether or not to display a unit 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 to convert the time axis into the position axis. The “save” cursor frame is for determining whether or not to save the waveform data displayed in the waveform display area 22.

A cursor frame for setting an item (channel) to be displayed in the waveform display area 22 is arranged on the right column of the cursor frame column 21. In the case of the present embodiment, there are eight 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.

After the waveform display image is displayed on the screen of the display unit 15, when the "waveform display" button at the bottom of the screen is pressed by the input operation from the input unit 14, the display control unit 12 causes the program A program for displaying the molding data stored in the memory 13 is called and executed. That is, the display control unit 12 displays the "waveform display" displayed on the screen.
When it is detected that the button has been pressed, the molding data sequentially stored in the molding data memory 11 is read according to the setting contents at that time, and the waveform is displayed in the waveform display area 22.

Next, the operation for changing the setting item will be described. The same applies when initial settings are made.

First, when the waveform display image is displayed on the display unit 15, the cursor frame of the item to be set is designated by the 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 Y-axis (vertical axis) setting program including a program that associates 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 opens.

Next, when the waveform display selection button 32 ("1. Speed setting") of 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, the first
The item corresponding to the channel is determined.

Returning to FIG. 3 again, in the window 31 corresponding to the first channel, the Y-axis scale "10" is determined.
There is a "0" button and a "-100" button. This represents the display scale in the waveform display area, and when these buttons are pressed, the numerical value input window opens and any numerical value can be input. It can also be changed by pressing the “Δ” button or “▽” 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 becomes the "0" level. Also,
When “200” and “0” are set, the scale is the same as when “100” and “−100” are set, and the lower end of the Y axis is the “0” level.

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 the waveform display area in real time (temporarily recorded in the molding data memory and immediately read). When the call waveform display button is "ON", the file selection window is opened and the molding data or setting data of the specified file is displayed in the waveform display area in a waveform.

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, the molding data is not displayed in the waveform display area.

Next, when the "X-axis setting" button (see FIG. 2) at the bottom of the screen is pressed, the display controller 12 sets the X-axis (horizontal axis) including a program for setting the display start timing. The program for use is read from the program memory 13 and executed. Then, on the screen of the display unit 15, as shown in FIG. 5, the waveform drawing trigger setting window 51 opens. The waveform drawing trigger setting window 51 has one corresponding to each of the upper and lower waveform display areas.
There are one by one.

When the total time button 1 (or the total time button 2) for determining the X axis is pressed in the state of FIG. 5, the time selection window 61 opens as shown in FIG.
By pressing the selection button in the time selection window 61, the time corresponding to the total time button 1 (or the total time button 2) can be changed. In addition,
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.

In the state of FIG. 5, Trig. Pressing the 1 button (or Trig. 2 button) opens the trigger selection window 71 as shown in FIG. The display start timing can be changed by pressing the selection button in the trigger selection window 71. The display start timing is determined by utilizing 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 the X-axis 2 button) is pressed in the state of FIG.
The X-axis selection window 81 opens as shown in FIG. And
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.

As described above, in the display device of the present embodiment, the upper and lower waveform display regions are
The items and scales of the X-axis and the Y-axis, the display start timing, etc. can be changed independently. as a result,
Different molding data can be displayed on the same screen in 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.

In the above embodiment, the case where the number of waveform display areas is two has been described, but the number of waveform display areas can be three or more. Further, in the above embodiment, the case where a maximum of four waveforms can be displayed in each waveform display area has been described, but it is also possible to display a larger number of waveforms.

As described above, the display device according to the present embodiment can display molding data in different steps on the same screen, so that it is easy to confirm where the molding data fluctuates during molding and to grasp the state of the molding machine. become.

Since the items and scales of each axis in the two waveform display areas can be changed independently, the molding data of a process which is completed in a relatively short time, such as a filling process, and the measuring process and one cycle of the entire process are performed. Even when the molding data of a process that requires a relatively long time is displayed on the same screen, the molding data of a process that requires a relatively long time is displayed on one screen and is injected on the other screen. By displaying molding data of a comparatively short time such as a process, it is possible to grasp the state of the molding machine in the process of a comparatively short time in detail.

Further, in the display device of the present embodiment, the same waveform data can be displayed in the two waveform display areas by setting one to be overwritten and the other not to be overwritten. It is possible to see only the latest one-time waveform data while observing the state change during continuous molding, that is, the molding stability.

Further, when the molding conditions are determined or changed, the influence of other processes can be grasped.

Further, in the display device of the present embodiment, since a plurality of waveform display areas can be displayed at once, the necessity of switching the screen is reduced, and the state of the injection molding machine can be efficiently grasped.

Further, in the display device of the present embodiment, the items of the X axis and the Y axis can be arbitrarily changed, so that the molding data was collected but the waveform was not displayed, which is of low importance. Alternatively, it is possible to easily display a waveform even for molding data that is not frequently used, and it is possible to easily grasp the influence of molding conditions in other processes on other processes.

As described 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 molding conditions can be shortened.

Next, an injection molding machine provided with a display device according to an embodiment of the present invention will be schematically described with reference to FIG. FIG. 9 is a cross-sectional view showing the overall configuration of an injection molding machine provided with the display device according to the embodiment of the present invention.

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 system which adopts other methods such as a pre-plastic type injection molding machine. It can also be applied to molding machines.

The injection molding machine 90 has a fixed platen 91 and a movable platen 92, and molds are attached to the fixed platen 91 and the movable platen 92, respectively. The movable platen 92 is movable with respect to the fixed platen by the mold clamping device 93, and the mold is opened and closed by moving the movable platen 92. An injection device 94 for filling the mold with resin is arranged on the opposite side of the movable platen 92 with respect to the fixed platen 91. The injection device 94 is a cylinder 95.
The resin that is heated and melted is measured by the screw 96 that moves while rotating inside, and the measured resin is filled (injected) into the mold.

The injection molding machine 90 is entirely covered with a cover (not shown), and the control board 97 is attached to the cover. The control panel 97 is a portion where an operator performs an input operation, and is provided with the input unit 14 and the display 15 shown in FIG.
It is connected to the controller 10.

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. . Sensor group 16
Includes, for example, a load 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.

Here, a combination of waveform display screens displayed by the display device according to the present embodiment will be described.

According to the display device of this embodiment, two or more triggers can be set as described above.
That is, the waveforms in a plurality of steps can be simultaneously displayed in parallel for one molding cycle. By displaying the waveform at the time of setup to determine the molding conditions, the molding conditions can be adjusted easily and quickly.However, the waveform display shows the stability of molding during continuous molding as well as during setup. It is also effective when checking.

That is, when the type of resin and the resin lot are changed during continuous production of resin molded products, the molding stability often deteriorates. 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.

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 step is the same, The detected value becomes large. In this way, when the back pressure setting or the like 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, it is possible to confirm the molding stability by simultaneously referring to various waveforms in multiple process start triggers such as injection start and measurement start, which are generally important for confirming the molding quality, and by additionally displaying the overwriting. It can be done efficiently and quickly.

Important items for confirming the molding stability by the waveform display are an injection speed detection waveform, a holding pressure detection waveform, etc. when the injection process start is used as a trigger. Further, when the start of the measuring process is used as a trigger, the screw rotation detection waveform, the resin back pressure detection waveform, the screw position detection waveform, etc. are important in the evaluation of molding stability.

Here, the triggering of the injection process start means that the waveform from the injection process start (filling process start) point is displayed in the display area. Similarly, triggering the start of the weighing process means displaying a waveform from the start of the weighing process.

The above-mentioned injection speed detection waveform is a waveform showing the detection value of the injection speed, and corresponds to the waveform showing the detection value of the forward speed of the screw in the injection molding machine as shown in FIG. The above-mentioned holding pressure detection waveform is a pressure waveform when pressure is applied to the mold after the mold is filled with the resin and the mold is held for a certain period of time. In the injection molding machine as shown in FIG. A pressure detection waveform in the pressure holding step obtained by pressurizing is obtained.

The above-mentioned screw rotation detection waveform is a waveform showing the rotation speed of the screw for filling the cylinder with the molten resin in the injection molding machine as shown in FIG. The above-mentioned resin back pressure detection waveform is a reaction force of the resin applied to the screw when the screw is rotated and the molten resin is fed to the front of the screw and accumulated in the injection molding machine as shown in FIG. This pressure causes the screw to retract. The above-mentioned screw position detection waveform is a waveform indicating the position of the tip of the screw in the axial direction in the injection molding machine as shown in FIG.

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 a trigger are displayed in the upper display area A, and various waveforms when the weighing process start is a trigger in the lower display area B. Is displayed. For example, referring to the resin back pressure detection waveform in the lower display area B, it is possible to easily understand how a change in the resin back pressure affects the injection pressure waveform shown in the upper display area A. You can

By arranging the display areas A and B vertically in parallel on the screen as shown in FIG. 10, the two display areas can be easily visually recognized and the convenience for the operator is improved. To do.

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, it is determined whether or not the variation is due to the variation in the back pressure.
In the lower display area B, the resin back pressure detection waveform can be immediately confirmed.

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. However, in addition to the timing that can be set as the trigger, the mold closing start, the ejector Various timings such as protrusion start, pressure holding start, mold opening start, ejector return start, and free mode (continuous drawing without trigger) can be set as a trigger.

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 by using the start of the injection step as a trigger, and the lower display area B also starts the injection step. An example is shown in which various waveforms are overwritten and displayed by using as a trigger. Thereby, while confirming the current (latest) waveform immediately after changing the setting value by 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 checked. be able to. Therefore, the molding stability after changing the set value can be easily confirmed.

Further, the upper display area A is set by using the start of the injection process as a trigger to display a waveform centering on the injection process, and the lower display area B is similarly set by using the start of the injection process as a trigger. The waveform may be displayed to show all steps of one cycle. As a result, screens frequently used during molding can be simultaneously displayed on the same screen, and the operation of switching the display screen can be omitted.

Further, in a two-material molding machine or a two-color molding machine, a waveform on the F side (operating side) is set in the display area A by setting the injection process start as a trigger, and is displayed on the R side (counter operating side). The waveform can be displayed in the lower display area B by setting the start of the injection process as a trigger. As a result, screens frequently used during molding of two materials can be simultaneously displayed on the same screen, and the operation of switching the display screens can be omitted.

According to the present invention, in a display device of an injection molding machine, a plurality of display areas are provided on the screen of the display device, and a waveform of molding data can be independently displayed for each area. As a result, the state of the injection molding machine can be easily grasped, and the time required for determining molding conditions can be shortened.

[Brief description of 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.

FIG. 3 is a diagram showing an example of a screen displayed after selecting channel 1 on the screen of FIG.

4 is a diagram showing an example of a screen displayed after pressing a display item button on the screen of FIG.

5 is a diagram showing an example of a screen displayed after pressing an X-axis setting button on the screen of FIG.

6 is a diagram showing an example of a screen displayed after pressing a total time button on the screen of FIG.

7 is a diagram showing an example of a screen displayed after pressing a trigger selection button on the screen of FIG.

8 is a diagram showing an example of a screen displayed after pressing an X-axis selection button on the screen of FIG.

FIG. 9 is a sectional view showing an 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.

FIG. 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 control unit 13 Program memory 14 Input section 15 Indicator 16 sensor group 21 cursor frame sequence 22 Waveform display area 23 buttons 24 small windows 31 Window corresponding to the first channel 32 "1. Speed setting" button 33 Cursor frame for channel 1 41 Selection window 51 Waveform drawing trigger setting window 61 hour selection window 71 Trigger selection window 81 X-axis selection window 90 injection molding machine 91 Fixed platen 92 Movable platen 93 Mold clamping device 94 injection device 95 cylinders 96 screws 97 control panel

Claims (7)

[Claims] 1. A display device of an injection molding machine for displaying a waveform of molding data detected by a plurality of sensors provided in each part of the injection molding machine and / or molding data inside a controller on a screen of a display. A first storage unit for storing the molding data, an input unit for inputting an instruction from an operator, and a program for defining a plurality of independent display areas on the screen of the display unit, A program for arbitrarily associating the molding data with each of the plurality of display areas based on an instruction from the input unit, the molding data associated with each of the plurality of display areas based on an instruction from the input unit A program for setting the display start timing for displaying, and the program associated with each of the plurality of display areas based on an instruction from the input unit. A second storage unit that stores a program for displaying molding data; and a display control unit that executes the program stored in the second storage unit, and the molding data is mutually displayed in the plurality of display areas. A display device for an injection molding machine, which is capable of displaying independently. 2. 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. The display device of the injection molding machine according to claim 1. 3. The second storage unit further stores a program for setting X-axis and Y-axis items for each of the plurality of display areas based on an instruction from the input unit. The display device of the injection molding machine according to claim 2. 4. The second storage section 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 section. The display device for an injection molding machine according to any one of claims 1 to 3, which is characterized in that. 5. The first display area for displaying the injection speed detection waveform or the pressure detection waveform from the start of the injection step, the screw rotation detection waveform and the resin back pressure from the start of the metering step. A second display screen for displaying one of the detected waveform and the screw position detected waveform, wherein the first and second display areas are set on the same screen of the display. The display device of the injection molding machine according to any one of claims 1 to 4. 6. The display device of 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. 7. An injection molding machine comprising the display device according to any one of claims 1 to 6.