KR100552951B1 - Injection molding machine and display unit thereof - Google Patents

Abstract

Provided is a display device of an injection molding machine having a plurality of display areas on a screen of a display device and capable of displaying waveforms of molding data independently for each area.

In the program memory 13, a program for defining a plurality of display areas independent of each other on the screen of the display unit 15, and for arbitrarily associating molding data with each of the plurality of display areas based on an instruction from the input unit 14; A program, a program for setting a display start timing for displaying molding data associated with each of the plurality of display regions, and a program for displaying associated molding data for each of the plurality of display regions are stored. The display control unit 12 displays the molding data stored in the molding data memory 11 in a state where the molding data are independent of each other in the plurality of display areas of the display.

Injection molding machine, display device, molding device, program memory, molding data

Description

Display molding and injection unit of an injection molding machine

1 is a block diagram of an injection molding machine display device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a screen displayed on the display device of FIG. 1.

3 is a diagram illustrating an example of a screen displayed after selecting channel 1 on the screen of FIG. 2.

4 is a diagram illustrating an example of a screen displayed after pressing a display item button in the screen of FIG. 3.

5 is a diagram illustrating an example of a screen displayed after the X-axis setting button is pressed on the screen of FIG. 2.

FIG. 6 is a diagram illustrating an example of a screen displayed after the total time button is pressed in the screen of FIG. 5.

FIG. 7 is a diagram illustrating an example of a screen displayed after the trigger selection button is pressed in the screen of FIG. 5.

8 is a diagram illustrating an example of a screen displayed after the X-axis selection button is pressed on the screen of FIG. 5.

9 is a cross-sectional view showing the entire configuration of an injection molding machine provided with a display device according to one embodiment of the present invention.

10 is a diagram illustrating an example in which waveforms are displayed by different triggers in two display regions.

FIG. 11 is a diagram illustrating an example in which the waveform displayed in FIG. 10 is overwritten. FIG.

Explanation of symbols on the main parts of the drawings

10: controller

11: molding data memory

12: display control unit

13: program memory

14: input unit

15: indicator

16: sensor group

21: cursor frame sequence

22: waveform display area

23: button

24: small window

31: window corresponding to the first channel

32: "1. Speed setting ”button

33: Cursor frame of the first channel

41: Selection window

51: Waveform Drawing Trigger Setup 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 device

95: cylinder

96: screw

97: control panel

The present invention relates to a display device, and more particularly, to a display device for waveform display of molding data of an injection molding machine.

In general, in an injection molding machine, various sensors including a pressure sensor are provided at each part, and the detection signals from the sensors are acquired as molding data, and the obtained molding data is used for determining molding conditions and confirming molding operations. Getting lost. In order to simplify the use of this molding data, the molding data is displayed as a waveform (graph) on the screen of the display.

The display device of the conventional injection molding machine is, for example, as described in Patent Document 1, and is composed of a sensor group, an input unit, a microcomputer, and a display unit, and is in the weighing process, the injection process, and the mold opening and closing process. It is comprised so that any one may be selected and the shaping | molding data in a selected process is displayed.

[Patent Document 1]

Japanese Patent Laid-Open No. 5-42575.

The waveform display of the molding data makes it possible to instantaneously determine whether the injection molding is in a state of injection molding, which is very convenient when the injection molding machine is continuously operated.

By the way, the some process in injection molding is not independent but is mutually related. For this reason, if molding data relating to a plurality of processes (for example, two successive processes) can be displayed on the screen of the display at the same time, it is more convenient because the causal relationship can be grasped.

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

 SUMMARY OF THE INVENTION The present invention has been made in view of the above matters, and an object of the present invention is to provide a display device for an injection molding machine which has a plurality of display areas on the screen of the display and can display waveform data of molding data independently for each area.

According to the present invention, there is provided a display apparatus of an injection molding machine for displaying waveforms of molding data detected by a plurality of sensors provided in each part of the injection molding machine and / or molding data inside the controller on a screen of the display, wherein the molding data is stored. A first memory unit for inputting, an input unit for inputting an instruction from an operator, a program for defining a plurality of display regions independent of each other on a screen of the display, and the plurality of display regions based on instructions from the input unit. A program for arbitrarily associating the molding data with each other, a program for setting a display start timing for displaying the molding data associated with each of the plurality of display regions, based on an instruction from the input unit, and an instruction from the input unit. respectively associated with the forming each display area of the plurality based And a second storage section for storing a program for displaying data and a display control section for executing a program stored in the second storage section so that the molding data can be displayed independently in the plurality of display areas. A display apparatus of an injection molding machine is provided.

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

<Example>

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail with reference to drawings.

1 is a block diagram of a display device according to one embodiment of the present invention. The display device includes an input unit provided in the molding data memory 11, the display control unit 12 and the program memory 13 included in the controller 10 which controls the drive of the injection molding machine, and the control panel of the injection molding machine. 14 and a display unit 15 are provided.

The molding data memory 11 sequentially stores molding data output from the plurality of sensors (sensor group) 16 provided in each part of the injection molding machine and molding data inside the controller 10. As the molding data inside the controller 10, for example, processed molding data obtained by processing molding data from the sensor 16, set molding data (setting molding data input from the input unit 14), and the like. In addition, the shaping data memory 11 stores a part of shaping data as a separate file by an instruction from the input unit 14.

The display control unit 12 executes a program stored in the program memory 13, thereby causing the display unit 15 to display waveforms (graphs) of the molding data stored in the molding data memory 11.

The program memory 13 stores a program necessary for waveform display of the shaping data on the display 15. As a program stored in the program memory 13, a program for defining a plurality of display areas that are independent of each other on the screen of the display unit 15, and the molding data memory 11 in each display area in accordance with an instruction from the input unit 14; A program for arbitrarily associating the molding data stored in the program, a program for setting a display start timing for displaying molding data related to each display area in accordance with an instruction from the input unit 14, and an instruction from the input unit 14, respectively. A program for setting the measurement time scale in the display area, a program for setting the items (data names) of the X-axis and the Y-axis of each display area according to the instructions from the input unit 14, and according to the instructions from the input unit 14 A program for switching the display method of each display area to an overwrite display or an update display, and each display according to an instruction from the input unit. And a program for displaying molding data related to an area.

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 in accordance with the contents displayed on the display unit 15.

The display unit 15 is a CRT, an LCD, or the like, and displays control data 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 conventionally, the description is abbreviate | omitted.

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

When the injection molding machine performs the injection operation under the control of the controller 10, each sensor of the sensor group 16 detects each detection object and outputs molding data. Molding data sent from the sensor group 16 is stored in the molding data memory 11 in turn for each sensor. The shaping data memory 11 stores shaping data from each sensor by a predetermined amount of time (may be different for each sensor (per process)). In addition, the shaping data in the controller 10 is also stored in the shaping data memory 11.

When the waveform display request is input from the input unit 14, the display control unit 12 reads and executes a program for defining a plurality of display regions from the program memory 13, and includes two waveform display regions independent of each other. A waveform display image is displayed on the screen of the display unit 15.

An example of the waveform display image displayed on the screen of the display unit 15 is shown in FIG. 2. Fig. 2 is based on the initial setting set in advance, 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, there are cursor frame columns 21 arranged in two columns, and the waveform display area 22 is on the right side. The waveform display area 22 is divided into two upper and lower stages. In addition, several buttons 23 are displayed at the bottom of the screen.

In the left column of the cursor frame column 21, cursor frames common to the upper and lower waveform display areas are arranged. The small window 24 provided in each cursor frame indicates whether the function assigned to the cursor frame is valid. In other words, no hatching indicates validity, and hatching indicates invalidity. The "ON / OFF" cursor frame is for determining whether to accept an operation from the input unit 14 for this screen. The "overwrite 1" and "overwrite 2" cursor frames determine whether the molding data is continuously displayed (overwritten) or only once (not overwritten) for each of the upper and lower waveform display areas. It is to. The "grid" cursor frame is for determining whether or not a dotted grid is displayed in the waveform display area. The "cursor" cursor frame is for determining whether to display a cursor which can be operated from a mouse or the like of the input unit 14. The "unit display" cursor frame is for determining whether to display units corresponding to the X-axis (horizontal axis) and Y-axis (vertical axis) of the waveform display area. The "Time → Pos." Cursor frame is for determining whether to convert the time axis to the position axis. The "save" cursor frame is for determining whether to save the waveform data displayed in the waveform display area 22.

In the right column of the cursor frame column 21, cursor frames for setting an item (channel) to be displayed in the waveform display area 22 are arranged. In the present embodiment, the items that can be displayed in the waveform display area 22 are eight channels, where the first to fourth channels correspond to the upper waveform display area, and the fifth to eighth channels display the lower waveform. Corresponds to the area.

After the waveform display image is displayed on the screen of the display unit 15, and 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 causes the program memory 13 Retrieve and execute the program that displays the molding data stored in the program. That is, when the display control unit 12 detects that the "waveform display" button displayed on the screen is pressed, the display control unit 12 reads the shaping data sequentially stored in the shaping data memory 11 according to the setting contents at that time, and displays the waveform display area ( 22) the waveform is displayed.

Next, the operation in the case of changing the setting item will be described. The same applies to the case where initial setting is performed.

First, in the step in which 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 stores a program for setting the Y axis (vertical axis) that includes a program for associating a plurality of pieces of shaping data with each waveform display area. Read from and run Then, the screen of the display unit 15 is as shown in FIG. That is, the window 31 corresponding to the first channel is opened.

Next, when the waveform display selection button 32 ("1. speed setting") of the opened window 31 is pressed, the selection window 41 is opened as shown in FIG. By pressing any button in the selection window 41, an item corresponding to the first channel is determined.

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 shows the display scale in the waveform display area. When these buttons are pressed, a numerical input window opens and an arbitrary number can be input. It is also possible to press the "△" button or the "▽" button on the left side of these buttons. In addition, when these buttons are set to "100" and "-100", the center of the Y-axis of each waveform display area becomes a "0" level. In addition, when it is set as "200" and "0", the lower end of a Y-axis becomes a "0" level on the same scale as the case where it sets to "100" and "-100".

The window 31 corresponding to the first channel includes a monitor waveform display button and a call waveform display button, one of which is "ON" and the other of which is "OFF". When the monitor waveform display button is "ON", the waveform is displayed in the waveform display area in real time (once recorded in the molding data memory and immediately read out). When the call waveform display button is "ON", the file selection window is opened and the shaping data or setting data of the specified file is displayed in the waveform display area.

In the state of FIG. 3, when the cursor frame of the first channel is designated again, the state returns to the state of FIG. 2. However, the shaping data is not displayed in the waveform display area.

Next, when the "X-axis setting" button (see Fig. 2) at the lower side of the screen is pressed, the display control unit 12 stores a program for setting the X-axis (horizontal axis) setting program including a program for setting the display start timing. Read from 13) and execute. Then, on the screen of the indicator 15, as shown in FIG. 5, the waveform drawing trigger setting window 51 is opened. The waveform drawing trigger setting window 51 has one corresponding to the upper and lower waveform display areas, respectively.

In the state of FIG. 5, when the total time button 1 (or the total time button 2) for determining the X axis is pressed, the time selection window 61 is opened 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. The total time button 1 and the total time button 2 correspond to the lengths after the " TRIG " point on the Y axis of the upper and lower waveform display regions, respectively.

5, when the Trig. 1 button (or Trig. 2 button) is pressed, the trigger selection window 71 is opened as shown in FIG. By pressing the selection button in the trigger selection window 71, the display start timing can be changed. In addition, the display start timing is determined using the output change (waveform trigger) of the sensor associated with each selection button in the trigger selection window 71. In addition, in the state of FIG. 5, when the X-axis 1 button (or X-axis 2 button) is pressed, the X-axis selection window 81 opens as shown in FIG. Then, by pressing the selection button in the X-axis selection window 81, the X-axis can be the time axis or a position (distance) axis from any reference position.

As described above, in the display device of the present embodiment, the items, scales, display start timings, and the like of the X and Y axes can be freely changed independently for each of the upper and lower waveform display regions. 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, molding data at the time of filling operation is displayed on the upper side, and molding data at the time of mold opening operation is displayed on the lower side.

In the above embodiment, the case where the waveform display area is set to two has been described, but it is also possible to set it to three or more. In the above embodiment, a case has been described in which up to four waveforms can be displayed in each waveform display area. However, more waveforms can be displayed.

As described above, in the display device of the present embodiment, molding data in different processes can be displayed on the same screen, so that it is easy to confirm where deviations occur during molding and to determine the state of the molding machine. do.

In addition, since the items and scale of each axis of the two waveform display areas can be changed independently, the molding data of the process which is completed in a relatively short time such as the filling process, and the relatively long length such as the weighing process or the whole cycle of one cycle Even when molding data of a process requiring time is displayed on the same screen, molding data of a process that requires a relatively long time is displayed on one screen, and a relatively short time such as an injection process is displayed on one screen. By displaying the molding data, it is possible to grasp in detail the state of the molding machine in a relatively short time process.

In the display device of the present embodiment, since the same waveform data can be displayed in two waveform display areas with one setting overwritten and the other not overwritten, the same waveform data can be displayed. In view of the change of state, that is, the stability of the molding, only the latest one waveform data can be seen.

In addition, it is possible to grasp the influence of other processes when determining or changing molding conditions.

In addition, in the display device of the present embodiment, since a plurality of waveform display regions can be displayed at one time, the necessity of switching the screens is reduced, and the state of the injection molding machine can be grasped efficiently.

In addition, in the display device of the present embodiment, the items on the X-axis and Y-axis can be arbitrarily changed, so that molding data is collected, but waveform display is not performed. Waveform display can also be easily performed with respect to the molding data, and it is possible to easily grasp the influence on other processes under the molding conditions in each process.

In view of the above, in the display device of the present embodiment, the state of the injection molding machine can be determined in a short time, and the time required for determining the 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. 9 is a cross-sectional view showing the entire configuration of an injection molding machine provided with a display device according to an embodiment of the present invention.

Although the injection molding machine 90 shown in FIG. 9 shows what is called an inline type injection molding machine among the screw type injection molding machines, this invention is applicable also to the injection molding machine which employ | adopted another system, such as a pre-plug type injection molding machine.

The injection molding machine 90 has a stationary platen 91 and a movable platen 92, and a mold is mounted on each of the stationary platen 91 and the movable platen 92. The movable platen 92 is movable with respect to the stationary platen by the mold clamping device 93, and the movable platen 92 is moved to open and close the mold. On the side opposite to the movable platen 92 with respect to the stationary platen 91, an injection apparatus 94 for filling resin into the mold is disposed. The injection apparatus 94 measures the heat melted resin by the screw 96 moving while rotating in the cylinder 95, and fills (injects) the measured resin into the mold.

The injection molding machine 90 is entirely covered by a cover (not shown), and the control panel 97 is mounted on the cover. The control panel 97 is a portion in which an operator performs input operation. The input unit 14 and the indicator 15 shown in FIG. 1 are provided and connected to the controller 10.

The controller 10 is provided with a molding data memory 11 which sequentially stores molding data output from the sensor (sensor group) 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 detecting load cell provided at the rear end of the screw 96, a sensor for detecting the rotation speed and the position of the screw 96, 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 according to the present embodiment, two or more triggers can be set as described above. That is, the waveforms in a plurality of steps can be displayed in parallel in one molding cycle. By performing waveform display at the chamfer for determining the molding condition, adjustment of the molding condition can be performed easily and quickly.However, the waveform display can be performed not only at the chamfering time, but also when confirming the molding stability during continuous molding. It also works.

In other words, if the type of resin or the lot of resin is changed during the continuous production of the resin molded article, molding stability often occurs. In such a case, molding stability can be easily confirmed by changing and adjusting the molding conditions and displaying a waveform on the display device.

For example, when the set value of the resin back pressure acting on the screw is increased, the density of the resin accumulated in the cylinder is increased, and even if the set value of the injection pressure in the resin injection step is the same, the detection value of the injection pressure is increased. In this way, if the back pressure setting or the like of the molding conditions is changed, the influence of the change of the molding conditions on the molding operation affects not only the weighing process but also the operation of the injection process. Therefore, it is possible to efficiently confirm the molding stability by simultaneously referring to various waveforms in a plurality of process starter triggers such as the start of injection and the start of weighing, which are important for checking the molding quality, and also performing overwriting display. It can also be done quickly.

After confirming the molding stability by waveform display, an important item is the injection speed detection waveform, the holding pressure detection waveform, and the like when the injection process is started. In addition, when the start of the weighing process is triggered, the screw rotation detection waveform, the resin back pressure detection waveform, the screw position detection waveform, and the like are important in the evaluation of molding stability.

Here, to trigger the injection process start means to display a waveform from the start of the injection process start (charge process start) in the display area. Similarly, triggering the weighing process start means displaying a waveform from the start of the weighing process.

In addition, the injection speed detection waveform mentioned above is a waveform which showed the detection value of injection speed, and corresponds to the waveform which showed the detection speed detection value of a screw in the injection molding machine as shown in FIG. The pressure holding waveform described above is a pressure waveform when the mold is filled with a resin and then the pressure is added to the resin and maintained for a predetermined time. In the injection molding machine as shown in FIG. 9, the pressure holding step is obtained by pressing the filled resin with a screw. It becomes the pressure detection waveform in.

The screw rotation detection waveform mentioned above is a waveform which shows the rotation speed of the screw for filling molten resin in a cylinder with a screw in the injection molding machine as shown in FIG. The resin back pressure detection waveform described above is the reaction force of the resin added to the screw when the screw is rotated and the molten resin is sent to the front of the screw and accumulated in the injection molding machine as shown in FIG. 9. Retreats. The screw position detection waveform mentioned above is a waveform which shows the position of the front-end | tip in the axial direction of a screw in the injection molding machine as shown in FIG.

10 is a diagram illustrating an example in which waveforms are displayed by different triggers in two display regions. In the example shown in FIG. 10, various waveforms when triggering the injection process start are displayed in the upper display area A, and various waveforms when triggering the weighing process start are displayed in the lower display area B. Is indicated. For example, 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. FIG.

In addition, as shown in FIG. 10, by arranging the display area A and the display area B in parallel on the screen, the two display areas can be easily visually confirmed, and convenience for the operator is improved.

11 is a diagram illustrating an example in which the waveform displayed in FIG. 10 is overwritten. For example, if there is a deviation in the injection pressure waveform shown in the upper display area A during continuous molding, the resin back pressure detection waveform is immediately confirmed in the lower display area B as to whether or not it is caused by the back pressure deviation. Can be.

In the above example, although the upper display area is set as the injection process start trigger and the lower display area is set as the trigger for the weighing process, other types of timings that can be set as triggers include mold start and ejector. Various timings such as protrusion start, holding pressure start, mold start, ejector return start, and free mode (continuous drawing without triggering) can be set as triggers.

In addition, as an example of displaying a plurality of display areas in parallel on the same screen, for example, various waveforms are displayed on the upper display area A by triggering the start of the injection process, and the injection process is also performed on the lower display area B. An example in which various waveforms are displayed by overwriting as a start is triggered. Thereby, while confirming the current (latest) waveform immediately after changing the set value by the waveform shown in the upper display area A, the change in the waveform after changing the set value in the lower display area B can be seen. . Therefore, the molding stability after changing a set value can be confirmed easily.

In addition, the upper display area A is set to trigger the start of the injection process to perform waveform display centering on the injection process, and the lower display area B is set to trigger the start of the injection process in a similar manner. The waveform display showing the whole one-cycle process may be used. As a result, a screen frequently used during molding can be simultaneously displayed on the same screen, and the operation of replacing the display screen can be omitted.

In a two-material molding machine, a two-color molding machine, or the like, the waveform on the F side (operation side) is set as a trigger to start the injection process, and displayed on the display area A, and the R side (operation). The waveform on the reverse side can be set to trigger the start of the injection process and displayed on the lower display area B. FIG. Thereby, the screen frequently used at the time of forming the second material can be displayed simultaneously on the same screen, and the operation of replacing the display screen can be omitted.

According to the present invention, in the display device of the injection molding machine, by providing a plurality of display areas on the screen of the display, the waveform data of the molding data can be displayed independently for each area, so that the state of the injection molding machine can be easily understood. The time required for determining the molding conditions can be shortened.

Claims (12)

A display apparatus of an injection molding machine for displaying a waveform on at least one of molding data detected by a plurality of sensors provided in each part of the injection molding machine and molding data inside the controller on a screen of the display device. A first memory section 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 a screen of the display, a program for arbitrarily associating the molding data to each of the plurality of display areas based on an instruction from the input unit, and based on an instruction from the input unit A program for setting a display start timing for displaying the molding data associated with each of the plurality of display regions, and a program for displaying the molding data associated with each of the plurality of display regions based on an instruction from the input unit. Second memory to remember, A display control unit which executes a program stored in the second storage unit, And the molding data can be displayed on the plurality of display areas independently of each other. The method according to claim 1 , And the second memory unit 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 method according to claim 2 , And the second memory unit stores a program for setting items of X-axis and Y-axis for each of the plurality of display areas based on an instruction from the input unit. The method according to any one of claims 1 to 3 , And the second memory unit stores a program for switching between overwrite display and update display for each of the plurality of display areas based on an instruction from the input unit. The method according to any one of claims 1 to 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 start of the injection process, a screw rotation detection waveform, a resin back pressure detection waveform, and a screw position detection waveform from the start of the weighing process. And a second display area for displaying any one, wherein the first and second display areas are set on the same screen of the display. The method according to claim 4 , The plurality of display areas include a first display area for displaying an injection speed detection waveform or a pressure detection waveform from the start of the injection process, a screw rotation detection waveform, a resin back pressure detection waveform, and a screw position detection waveform from the start of the weighing process. And a second display area for displaying any one, wherein the first and second display areas are set on the same screen of the display. The method according to claim 5 , And the first and second display areas are arranged in parallel above and below on the same screen of the display. The method according to claim 6 , And the first and second display areas are arranged in parallel above and below on the same screen of the display. An injection molding machine comprising the display device according to any one of claims 1 to 3 . An injection molding machine comprising the display device according to claim 4 . An injection molding machine comprising the display device according to claim 5 . delete

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