JPH072369B2 - Extrusion molding line trend display controller - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a trend display control device for an extrusion molding line, and particularly to a display in an extrusion molding line including an extruder and used for plastic molding of long products and laminates. The present invention relates to improvement of a target trend display control device.

[Conventional technology]

An extrusion molding line for extruding a long product such as a plastic pipe or a laminate such as a plastic sheet is constructed by connecting a take-up machine to an extruder, for example, and a molten plastic raw material is extruded by a screw in the extruder. At the same time, the structure is such that the extruded product is taken out by a take-out machine.

In such an extrusion molding line, in order to avoid damage to the mechanical system of the extruder and the take-up machine itself and maintain a certain molding quality, the rotation speed of the motor that drives the screw of the extruder and the cylinder part around the screw It is required to display the temperature, the pressure of the resin to be extruded, and the like as a graph over time, display the changing tendency (so-called trend) on the monitor screen, and start and operate while monitoring.

[Problems to be Solved by the Invention]

However, in the conventional extrusion molding line, it is general that many items are displayed such as the number of rotations of the motor, the temperature of the screw portion, the pressure of the resin to be extruded, and the like.

Therefore, from the viewpoint of operating the extrusion molding line accurately while simultaneously monitoring a plurality of display objects, it has been desired to provide a trend display control device capable of displaying the trend of a plurality of display objects on one screen at a time.

In addition, even if the measured value from the display object exceeds a predetermined allowable value, that is, the alarm state, from the viewpoint of grasping the transition of various measured values of the extrusion molding line, there are multiple display objects before and after the alarm state. It is necessary to display the trend, but conventionally, there is not provided a display device for displaying the trend of a plurality of display targets before and after the alarm state,
It was inconvenient.

The present invention has been made in view of such a situation, and displays the same number and different number of display objects among a plurality of display objects in an extrusion molding line at one time on the same screen as well as trend display of the same display object. An object of the present invention is to provide a trend display control device capable of selecting and displaying a plurality of times.

Another object of the present invention is to provide a trend display control device capable of displaying a trend of a plurality of display targets before and after the alarm is issued even when an alarm condition is displayed for the display target of the extrusion molding line.

[Means for Solving the Problems]

In order to solve such a problem, the present invention provides a display means 100, first to third storage means 101 to 103, a selection means 104, and a first means, as shown in the claim correspondence diagram of FIG. And second display control means 105 and 106, and switching means 107.

The display means 100 includes a plurality of display target names, respective display items related to the display target names, a trend monitor screen showing a trend of measured values of the plurality of display targets, and a plurality of display targets to be displayed on the trend monitor screen. The trend setting screen for selecting is electronically displayed.

The first storage means 101 stores at least the plurality of display target names and display items, and the second storage means 102.
Stores the trend setting screen data.
The storage means 103 stores the plurality of measured values over time, and the selection means 104 selects the display target name and display item from the first storage means and displays the trend display of one display target. This allows selection multiple times.

The first display control means 105 creates the trend setting screen with the plurality of display target names and display items selected by the selecting means as display targets on the trend monitor screen, and uses the trend setting screen data as the first display control data. 2 storage means
It is what is stored in 102.

The second display control means 106 displays a plurality of display target names and display items to be displayed based on the trend setting screen data from the second storage means 102, and the first storage means 101.
A plurality of measured values related to the display object are acquired from the third storage means 103, and the measured values related to the plurality of displayed objects are displayed as a trend over time and the trend monitor screen is displayed. Is created and displayed on the display means 100.

The switching means 107 switches between a plurality of the trend monitor screens displaying the same number of the display targets in a trend and switching between a plurality of trend monitor screens displaying the different numbers of the display targets in a trend.

Further, the second display control means 106 may be configured to display the measured value of the display target in a trend for a predetermined period before and after the measured value of the display target exceeds the allowable set value set from the outside. It is possible.

[Action]

In the present invention provided with such means, the first storage means 10
1, a plurality of display target names and display items, trend setting screen data in the second storage means 102, and second storage means 103.
If the measured value is stored in the first display control means 105
Creates the trend setting screen as a display target for displaying a plurality of display objects selected by the selecting means 104 on the trend monitor screen, displays the trend by the control means 100, and displays the trend setting screen data in the second screen. It is stored in the storage means 102.

Then, the second display control means 106 sets a plurality of display targets to be displayed on the trend monitor screen as the second storage means 10 described above.
From 2, the display object and the display item to be displayed are respectively fetched from the first storage means 101, and a plurality of measured values relating to the same and different numbers of the display objects are respectively fetched from the third storage means 103, and the trend monitor screen is displayed. Create the above display means 100
While the trend is displayed over time, the same number or different number of trend display monitor screens to be displayed are mutually switched under the control of the switching means 107, and a plurality of trend displays for the same display object are selected based on the selection by the selecting means 104. Display control over times.

Further, in the configuration in which the second display control means 106 displays the trend for a predetermined period before and after the time when the measured value exceeds the allowable set value, the trend display before and after the alarm state is generated can be grasped.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a schematic diagram showing an example of an extrusion molding line for implementing the trend display control device according to the present invention.

In the figure, an extruder 1 has other components such as an extrusion motor 5 for rotationally driving a main screw (not shown) in a molding machine table 3, a rotation speed detection sensor 7 of the extrusion motor 5, and the like. It has a conventionally known configuration. Reference numeral 9 is a cable described later.

A hopper that supplies plastic raw materials to the molding machine table 3.
11 is equipped with a raw material feeder device 13 having an auxiliary screw (not shown) and the like, and the raw material feeder device 13
A feeder motor 15 for rotationally driving the auxiliary screw and a rotation speed detection sensor 17 are arranged in the.

In the extruder 1, a heater (not shown) and temperature sensors 19a to 19e for temperature measurement are arranged in a plurality of sections obtained by dividing the cylinder portion around each screw in the extrusion direction, and the die 21 at the tip is arranged. A pressure sensor 23a for measuring the resin pressure is arranged in the portion.

These extrusion and feeder motors 5 and 15, rotation speed detection sensors 7 and 17, temperature sensors 19a to 19e, and pressure sensor 23.
Is connected to the operation controller 25 including the trend display controller of the present invention by the cable 9 described above.

Then, the extrusion and feeder motors 5 and 15, the rotation speed detection sensors 7 and 17, the temperature sensors 19a to 19e, and the pressure sensor.
The information regarding 23 is displayed as a trend, and the molded article is extruded while operating while being monitored by the operation control device 25.

FIG. 3 is a block diagram showing the configuration of the trend display control device according to the present invention.

In the figure, a control circuit 27 includes a CPU 29 that is a main element that achieves the functions described later, a ROM 31 that stores an operation program of the CPU 29, a RAM 33 that temporarily stores data in the calculation process of the CPU 29, and a data input / output unit. It is formed by having the interface (I / O) 35 and the like and is a main part of a so-called microcomputer.

The keyboard 37 connected to the control circuit 27 is formed on the operation surface of the apparatus body as shown in FIG. 2, and its function will be described in detail later.

First to fourth storage circuits 39, 41 connected to the control circuit 27,
43 and 45 and the alarm set value storage circuit 47 are external storage circuits as storage means composed of RAM and are used by dividing the storage area.

The first storage circuit 39 stores layout screens (frame screens) for trend setting screens and trend monitor screens, display target names, item names related to the display target names, set values related to the item names, and the like. These display objects include, for example, the temperatures of a plurality of cylinders and adapters, the rotation speed of the motor, the current of the motor, the resin pressure, and the like.

Trend setting screen data for setting a plurality of display targets for trend display in the second memory circuit 41 (see FIG. 4)
However, the measurement value data described below relating to a plurality of display objects can be stored in the third storage circuit 43 with the passage of time, and the fourth storage circuit 45 stores a plurality of trend monitor screen data described later. It is memorable.

These first to fourth storage circuits 39, 41, 43, 45 are controlled to store and read data under the control of the control circuit 27.
The third storage circuit 43 can store 1920 measured values and also can store 8 types (8CH), 4 types (8CH), and 2 types (2CH) of measured values to be displayed.
When 8 types (8CH) of display target are specified, 1 type (1CH)
It is possible to store 240 measured values per unit, 480 in 4 types (4CH) and 960 in 2 types (2CH). The sampling cycle of each measured value is set on the trend setting screen.

The alarm set value storage circuit 47 stores, under the control of the control circuit 27, a range of set values that are alarm set values input from the keyboard 37 and that are allowed for the measured values of each display target. When the measured value exceeds the alarm set value, the alarm is activated.

The display device 49 connected to the control circuit 27 is, for example, a plasma display device that displays a trend setting screen, a trend monitor screen, and the like. Details of the trend setting screen and the trend monitor screen will be described later.

The measuring device 51 is the sensor 7, 17 of FIG.
23, including others, converts an analog electric signal according to the measurement result to a digital signal and outputs it.
It is connected to 27 to form the measuring means.

The keyboard 37 has a function of inputting instructions for starting and stopping trend display, setting input on a trend setting screen described later, and other data input functions described later.

The control circuit 27 has the following functions in addition to the control functions described above.

That is, the layout screens related to the trend setting screen and the trend monitor screen stored in advance in the first storage circuit 39 are displayed on the display device 49, and the display target and the display are displayed on the display screen of the trend setting screen and the trend monitor screen. The trend setting screen and the trend monitor screen are created by overwriting the items and set values, the trend graph, etc., and the trend setting screen is stored in the second storage circuit 41 and the plurality of trend monitor screens is stored in the fourth storage circuit.
It has a function to store in 45.

FIG. 4 is a trend setting screen created on the basis of the data input from the keyboard 37 and displayed on the display device 49.

In the figure, the "CH" column in the "Input CH setting" column is for setting the number of display targets that can be trended, and the "Select" column is for selecting either temperature or analog input signal (AI).
The temperature is adjusted with, the AI is selected with "1", and the "Input CH" column shows the number of each display target type in the "Select" column.
The "stop" column is for selecting whether or not to stop the trend when the alarm is issued, and for "1", the trend operation after the alarm is stopped is stopped.

The “Name” column displays the display target together with the unit by the settings in the “Select” column and the “Input CH” column described above. In the figure, cylinders 1 to 4, adapter 1, extruder 1, current 1, resin Eight types of pressure 1 are displayed.

The "set value" in the "display setting" column indicates the display standard for each display target, and the normal operation set value is set. The "range" column sets the display range centered on the set value, and normally sets the allowable range of the operation set value.

The “screen frame” column is for setting the number of display targets to be displayed on one screen of the display device 49, and the 4CH column is 1,
The 2,2CH columns are fixedly displayed as 1,2,3,4.

In the "Display position setting" column, the "column" indicates the allocation order of the display targets to be displayed on the screen, and the "CH" column indicates the display screens A, B, C, D, E, F on one screen. Enter which display target is to be displayed as a trend in either G or H column.
It is set by the number in the "CH" column in the "CH setting" column.
One CH can be set multiple times. The “Name” column is automatically displayed according to the settings in the “CH” column.

That is, in the "Input channel setting" column, set the total number of display targets (for example, 8) to display the trend, set the display range in the "Display setting" column, and set the "Screen frame" column and "Display position setting". In the column, the display configuration is set for displaying two of these eight display objects on one screen and displaying four of them.

These settings are set under the control of the control circuit 27 by inserting numerical values and character data input from the keyboard 37, and the control circuit 27 serves as a selection means at the time of trend setting and a display control means. ing.

The "Sample period" column in FIG. 4 is a column for setting the period in which the measured values to be displayed are fetched from the measuring device 51 in FIG. 3 and stored in the third memory circuit 43, and the "Endless" column is the trend. Set whether or not to display the display endlessly. The "Sample count after alarm" field is the input field for the number of sample measurements after the alarm is issued, and the "Trend input channel count" field is the "Input channel setting" field described above. The number of trends to be displayed in is set.

The control circuit 27 takes in the measured values, stores them in the third storage circuit 43 with the lapse of time, and stores them in the trend setting screen for the display object designated for the trend display for each sampling period set based on the trend setting screen data. "Display setting" field, "Screen frame" field and "Display position setting"
Based on the data in the column, it is processed into a bar graph and input to the display device 49 over time, and the trend monitor screen as shown in FIG. 5 and FIG. 6 is created together with the aid screen from the first memory circuit 39. However, it has a function of storing in the fourth memory circuit 45. Thus, the control circuit 27 forms a trend display control means.

Further, when the endless selection is made on the trend setting screen, the control circuit 27 reads all the data set with the trend as shown in FIG. 7A, which is the trend display of temperature control, and includes the current measurement data. When the display target for the designated one screen is displayed and the endless is not designated, as shown in FIG.
The data is displayed as a trend until the storage circuit 43 of overflows or the trend is forcibly stopped.

Further, the control circuit 27 also has a function of displaying the measurement data including the measurement data depending on whether the measurement data is in the trend or displaying the oldest data in the third storage circuit 43 on the display device 49.

The control circuit 27 compares the measured value of the display target for which the trend display is designated with the allowable alarm set value stored in the alarm set value storage circuit 47, and when the measured value is in the alarm generation state,
It also has a function of referring to the alarm setting on the trend setting screen and taking in the number of samples (for example, 60 times) set as shown in FIG. 7C after the alarm is generated and displaying the trend with the number of samples. .

If endless is specified, the trend display is stopped until the alarm generation state is instructed to be forcibly ended.The trend display operation continues until endless is set. The trend display operation is performed until the capacity of the memory circuit 43 of No. 3 is exceeded or until the trend end instruction is forced. Further, the control circuit 27 has a screen movement control function to the left and right for every 1/2 part of one screen of the trend monitor screen.

That is, for example, the trend display is such that the display screen is a, b, c, d, e, f, g, h in the time axis direction as shown in FIG.
Assuming that one screen is formed by two of a to h and two of a to h, the key operation indicated by the mark →, the mark ← on the trend monitor screen (actually, the operation of the keyboard 37)
It is possible to observe the trend display along with the temporal change by moving the screen left and right by 1/2 as shown in (b) and (c) of the figure.

By operating the next screen key, as shown in FIG.
It is possible to switch from four trend displays A to D to the next four trend displays E to H. Also, two trend displays A and B, C and D, E and F, G and H can be switched. It can be switched sequentially.

Further, as shown in FIG. 10, the control circuit 27 has a function capable of switching from two trend display states to four trend display states. When shifting from the four trend display states to the two trend display states, control is performed so as to shift to the screen previously set by "1" or "3" in the "2CH" column of the trend setting screen.

In this way, the control circuit 27 functions as a switching means together with the keyboard 37.

11 and 12 are flow charts for explaining the operation according to the present invention described above. FIG. 11 shows the trend preparation processing operation for the set display object, and FIG. 12 shows the trend display operation. is there.

When the trend starts in Fig. 11, step 200
The trend setting data, that is, the trend setting screen, is referred to, and the specified display target type and number of trends (CH)
Other setting items are imported.

In the following step 201, all the measured values of the trend set display target are stored in the third memory circuit 43,
In 202, it is judged whether the car is endless.

If endless is not set on the trend setting screen and step 202 is NO, move to step 203
It is determined whether or not the storage circuit 43 of No. 1 has overflowed. If YES, the trend ends, and if NO, the process proceeds to Step 200.

If endless is set on the trend setting screen and step 202 is YES, the process moves to step 204 and step 204
The presence / absence of an alarm setting on the trend setting screen is determined at. If NO, the process returns to step 200, and if YES at step 205, the measured value after the alarm is set is read.

In the following step 206, it is determined whether or not the alarm is being generated. If NO, the process returns to step 200, and if YES, the alarm is maintained in the following step 207.

In step 208, after the alarm is issued, it is determined whether or not the predetermined measurement period has ended. If NO, the process returns to step 200 and Y
In the case of ES, the trend ends.

Therefore, when the endless setting is not made, the trend ends due to the overflow of the third storage circuit 43. When the endless is set, the trend processing is performed until the predetermined number of samples after the alarm setting is reached, and the processing ends. This completes the preparation for trend display.

When the trend display in Fig. 12 starts, step 300
2 or 4 are displayed on the trend setting screen
If the number is 4, the fixed frame display (layout screen display) for 4 is displayed on the display device 49 in step 301, and the process proceeds to step 303.
Then, two fixed frame displays (layout screen displays) are displayed on the display device 49, and the process proceeds to step 303.

In step 303, it is judged whether or not the trend is currently in progress, and Y
In the case of ES, all the data set with the trend is read in step 304, one screen is displayed so that the current measurement data is displayed, and the trend display is ended.

If NO in step 303, all the data for which the trend has been set is fetched in step 306, and in the following step 307, one screen is displayed from the oldest stored data, and the process ends.

〔The invention's effect〕

As described above, the screen display control device of the present invention creates a trend setting screen by selecting a plurality of display targets to be displayed on the trend monitor screen from a plurality of display targets,
Display items related to the display target to be displayed at one time based on a plurality of display targets on this trend setting screen, and the measured values related to this display item are respectively fetched from the storage means, and the measured values of a plurality of display targets are made the same and different. With the trend display on the display means with the passage of time, it is possible to switch between trend monitor screens of the same or different number of display targets and to select the trend table selection target of the same display multiple times. For multiple display targets, you can trend any number of display targets at once on the same screen, and you can easily switch between trend displays for the same or different number of display targets. The trend can be displayed multiple times.

Further, if the trend display control means is configured to display the trend for a predetermined period when the measured value to be displayed exceeds the allowable set value, the trend display before and after the alarm state is generated is performed, and the extrusion molding line is displayed even when the alarm state is generated. It is possible to grasp the transition of various measured values and contribute to analysis and response.

[Brief description of drawings]

FIG. 1 is a claim correspondence diagram corresponding to the claims according to the present invention, FIG. 2 is a schematic diagram showing an example of an extrusion molding line including an operation control device, and FIG. 3 is a trend display control device according to the present invention. FIG. 4 is a block diagram showing an embodiment of the present invention, FIG. 4 is a trend setting screen for display targets, and FIGS. 5 and 6 are diagrams showing trend monitor screens for display targets set in FIG. , FIG. 6 shows four display screens), 7
FIG. 8 is a diagram for explaining start / stop of trend display and trend display after an alarm is issued, FIGS. 8 to 10 are diagrams for explaining switching modes of the trend monitor screen, and FIGS. 11 and 12 are diagrams of the present invention. It is a flow chart explaining operation. 1 …… Extruder 3 …… Molding machine stand 5, 15 …… Motor 7, 17, 19a to 19e, 23 …… Sensor 13 …… Raw material feeder 25 …… Operation controller 27 …… Control circuit 37 …… Keyboard 39 ... First storage circuit 41 ... Second storage circuit 43 ... Third storage circuit 45 ... Fourth storage circuit 47 ... Alarm set value storage circuit 49 ... Display device 51 ... Measuring device 100 ... Display means 101 ... First storage means 102 ... Second storage means 103 ... Third storage means 104 ... Selection means 105 ... First display control means 106 ... Third display Control means 107 ... Switching means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihisa Miyaki 5-16-6 Kugahara, Ota-ku, Tokyo Rika Kogyo Co., Ltd. (56) Reference JP-A-63-278127 (JP, A) JP-A-63 -278128 (JP, A) JP-A-2-20319 (JP, A) JP-A-2-155624 (JP, A)

Claims (2)

[Claims] 1. A screen display control device for controlling trend display of a plurality of display objects in an extrusion molding line, the plurality of display object names, display items related to the display object names, and a plurality of the display objects. Display means for electronically displaying a trend monitor screen showing a trend of measured values of the target and a trend setting screen for selecting a plurality of the display targets to be displayed on the trend monitor screen, and at least a plurality of the display target names And a first storage means for storing the display item, a second storage means for storing the trend setting screen data, a third storage means for storing a plurality of the measured values with the lapse of measurement time, the third storage means, Selecting means for selecting the display target name and display item from one storage means and enabling selection of one display target trend display a plurality of times; A plurality of display object names and display items selected by the selecting means are created as the display objects on the trend monitor screen to create the trend setting screen, and the trend setting screen data is stored in the second storage means. Display control means, and a plurality of display target names and display items to be displayed based on the trend setting screen data from the second storage means are fetched from the first storage means and measurement values related to the plurality of display targets From the third storage means to create the trend monitor screen in which a plurality of measured values of the display object are trend-displayed with the same number and different numbers, and the second display is displayed on the display means. Control means, switching between a plurality of the trend monitor screens for displaying the same number of the display objects as trends, and a different number of the display objects A trend display control device for an extrusion molding line having switching means for controlling switching between the plurality of trend monitor screens for displaying the trend. A trend display control device for an extrusion molding line, comprising: 2. The second display control means displays a trend of a plurality of the display targets for a predetermined period before and after the time when the measured value of the display target exceeds an allowable set value set from the outside. The screen display control device of the extrusion molding line according to claim 1.