JPH0623818A - Measured data processing device for injection molding machine - Google Patents

Abstract

PURPOSE:To easily grasp all of measured data on a collective basis by a method wherein a microcomputor sorts the measured data into a plurality of shot numbers by their monitor items to perform an statistical operation and displays the distributed conditions of the dot data representative of such measured data on a printer or indicating device. CONSTITUTION:A molding condition setting storage part 8 has various operation condition values stored therein. A molding process control part 9 performs driving and controlling through a driver group 3 from the data from an actually measured value memory part 10 for receiving the measured information real time from a sensor group 2 based on the set condition value stored in the control program of the molding process control part 9 and the molding condition setting storage part 8. A computing part 11 computes an actually measured value X for each monitoring item when the measured data in the actually measured value memory part 10 reaches a predetermined sampling shot number to obtain maximum value, minimum value, average value, etc. The results thus obtained are transferred through an output data processing part 12 to an indicating device 5 or printer 6 to display such results thereon in the form of a dot distribution graph.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measurement data processing device for an injection molding machine, and in particular, it stores and stores measurement data such as operating conditions based on the output from each sensor for each shot during continuous automatic operation. The present invention relates to a measurement data processing device of an injection molding machine equipped with a microcomputer (hereinafter referred to as a microcomputer).

[0002]

2. Description of the Related Art In recent injection molding machines, a microcomputer incorporated in the machine (injection molding machine) drives each part of the molding machine based on preset molding operation condition values and measurement information from each sensor. It is controlled so that the continuous molding operation is executed. By the way, even when the continuous molding operation is performed by such a microcomputer control, the same molding operation condition value may not be obtained due to factors such as atmospheric temperature fluctuations in the morning, daytime, nighttime or each day, and unexpected resin behavior fluctuations. Even in the set state, the actual measurement value of the operating condition may fluctuate and sometimes the actual measurement value of the operating condition may deviate from a predetermined upper / lower limit value range (allowable range).

Although grasping and elucidating the factors of variation of the actual measured values of the operating conditions contributes to the molding of good products in many cases, the measured data of a plurality of monitor items such as the actual measured values of the operating conditions are taken in for each shot, and simply Even if the data is printed out as a list of numerical data, the visibility is poor and the degree of variation in measurement data and the tendency of fluctuation cannot be grasped quickly and accurately.

Accordingly, the applicant of the present application has proposed an injection molding machine having a function of printing out the distribution state of the measured data of each item in a form that can be visually recognized at a glance.
-199025 is proposed. In this prior application, for example, as shown in FIG. 4, the measurement data for each monitor item is printed out as a dot distribution graph in which dots are displayed in the order of shot numbers, and the degree of variation and fluctuation tendency of the measurement data are grasped. Making it easier.

[0005]

However, in the above-mentioned dot application graph printout method of the prior application,
Since each measurement data is printed and displayed one dot at a time for each shot, the change for each shot is easy to understand, but there is a problem that the overall (for example, one day) tendency is difficult to grasp at a glance. . This is because, if the cycle time of one shot is, for example, about 4 seconds, the number of shots per day exceeds 20,000, and the printout data becomes large. In addition, if you try to view the data for several days to a week all together, the printout data will become even longer, and it will become more difficult to grasp the trends at a glance, and the print data will easily be wasted. It also increases printing time. Further, in the dot distribution graph print-out method of the prior application, since each data is simply dot-printed within a predetermined numerical width, only the position display of this dot is data outside the allowable range (data indicating a defect). There is also a problem that it is difficult to find out whether or not there is, and this tendency intensifies especially when the printout data becomes large.

Therefore, the technical problem to be solved by the present invention is to solve the above-mentioned problems of the prior art,
The purpose is to easily grasp the whole (for example, one day) tendency of the measurement data over many shots, save the printing paper and printing time, and overlook whether there is defective data or not. Without making sure, it is possible to discover quickly.

[0007]

In order to achieve the above-mentioned object, the present invention comprises a microcomputer for driving and controlling each part of a molding machine based on each set molding operation condition value and measurement information from each sensor, In a measurement data processing device of an injection molding machine, wherein the microcomputer captures and stores measurement data of a plurality of predetermined monitor items for each shot during continuous automatic operation, and has a function of processing the measurement data. , The microcomputer collects the measured data for each monitor item for a predetermined number of shots and performs statistical calculation processing.
In order that the distribution state of the dot data representative of the measurement data for the predetermined plurality of shots can be visually recognized, for example, the representative dot data can be output as a printer in which the representative dot data is continuously displayed vertically within a predetermined numerical value width. Composed.

Further, in the present invention, when there is one or more data outside the predetermined allowable range in the measurement data for the predetermined plurality of shots, the measurement data for the predetermined plurality of shots is represented. A display indicating this is also output in the vicinity of the dot data, for example, as an "x" mark, which is also output.

[0009]

The number of shots arbitrarily set by the operator, for example, the measurement data for 5 to 100 shots are statistically processed as one group, and the measurement data for a plurality of shots grouped into one group is used as representative data. For example, the average value, the maximum value, and the minimum value are printed out as dots that fit within a predetermined numerical width. By doing so, the measurement data for 5 to 100 shots are displayed collectively, so that the data for many shots (for example, one day) can be compressed and printed out within a short paper range. Therefore, since it is only necessary to refer to the short paper range when examining the data, it is possible to easily grasp the entire tendency (for example, one day) of the measurement data over a large number of shots, and it is possible to save print paper and print time.
In addition, if even one piece of measurement data for a plurality of shots is out of the allowable range (data indicating a defect), for example, in the vicinity of the representative dot data of the measurement data for the predetermined plurality of shots, for example, " Have the “X” mark be added. Therefore, if there is defective data, it can be found at a glance, and it will not be overlooked whether there is defective data.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a simplified block diagram of a control system of the injection molding machine according to this embodiment. In the figure, 1 is a microcomputer (microcomputer) that controls the operation of the entire machine (injection molding machine), calculation / judgment processing of measured data, display control, print output control, etc. 2 is provided in each part of the machine Sensor group consisting of many sensors, 3
Is a driver group composed of a large number of driver circuits for driving and controlling a large number of driving sources arranged in each part of the machine,
Reference numeral 4 is a key input device provided on the front surface of the machine, and 5 is, for example, a color C provided adjacent to the key input device 4.
A display device including an RT display, a color LCD, etc.
6 is a printer which is connected to an injection molding machine and is capable of dot output, such as a printer including a wire dot printer, a thermal printer, a laser printer, and 7 is a magnetic disk device, an optical disk device, an IC memory board or card connected to the injection molding machine. And the like are external storage devices.

The microcomputer 1 shown in FIG.
Control of the entire molding process such as injection operation, mold opening / closing operation, eject operation, calculation / judgment processing such as good / defective judgment processing and abnormality judgment processing, statistical calculation processing of measured data described later, or the display device 5 Various processes such as output image display control processing and print data generation / sending processing to the printer 6 are executed. The microcomputer 1 is actually composed of various I / O interfaces, ROM, RAM, CPU, etc., and executes various processing by various programs created in advance.
The following description will be made on the assumption that the molding condition setting storage unit 8, the molding process control unit 9, the measured value storage unit 10, the arithmetic processing unit 11, the output data processing unit 12 and the like are provided.

The molding condition setting storage unit 8 stores various operating condition values input by the key input device 4 or the like in a rewritable form. The operating condition values include, for example, the relationship between the screw position and the screw rotation speed during the charging stroke, the screw retreat speed, and the back pressure.
Suck back control condition, injection speed condition from injection start to holding pressure switching, primary injection pressure condition, secondary pressure (holding pressure) switching condition, holding pressure condition from holding pressure change to holding pressure end,
The band heater temperature of each part, mold closing (mold clamping) stroke and speed control condition, mold clamping force, mold opening stroke and speed control condition, eject control condition and the like can be mentioned.

The molding process control section 9 is based on the molding process control program created in advance and the setting condition values stored in the molding condition setting storage section 8, and the sensor group 2 arranged in each part of the machine. The driver group 3 (motor driver) is referred to while referring to the data from the actual measurement value storage unit 10 that takes in the measurement information from (position sensor, pressure sensor, temperature sensor, etc.) in real time and the time information from the clock built in itself. ， Hydraulic control valve driver ，
A corresponding drive source is driven and controlled via a heater driver or the like) to execute a series of molding steps.

All the actual measurement data of preset monitor items during continuous automatic operation are fetched into the actual measurement value storage section 10 over a predetermined number of continuous shots. The monitor items to be fetched include time monitoring items, position monitoring items, rotation speed monitoring items, speed monitoring items, pressure monitoring items, temperature monitoring items, power monitoring items, and the like, and the important items of the molding operation condition setting items described above. Are almost overlapping.

The arithmetic processing unit 11 includes a measured value storage unit 10
When the measurement data stored in (1) reaches a predetermined number of predetermined sampling shots (for example, when the data of the number arbitrarily set to several hundreds of shots is sampled by the user), the measured value x for each monitor item is calculated. Statistical calculation processing is performed to calculate at least the maximum value x _{max of the} actual measurement value x minimum value x _{min of the} actual measurement value x _min average value x _AVE = (Σx _i ) / n of the actual measurement value x.

Further, the arithmetic processing unit 11 may, if necessary, a variation range R = x _max −x _min center value (median) Me = (x _min + R / 2) variance v = {Σx ² − (Σx ) ² / n} / (n-1) standard deviation σ = √ [{Σx ² − (Σx) ² / n} / (n−
1)] R / X = R / x _AVE · 100 [%] 3σ / X = 3σ / x _AVE · 100 [%] etc. are also calculated.

The processing result thus calculated is sent to the output data processing unit 12, and the output data processing unit 12
In the above, data is transferred and output to the display device 5 or the printer 6 after being appropriately converted according to the output form.
As will be described later, it is displayed or printed out in the form of a dot distribution graph. That is, in this embodiment, the output data from the arithmetic processing unit 11 is the output data processing unit 1
In step 2, the dot data is converted into dot data (dot data indicating a position) that fits within a predetermined numerical width, and is displayed or printed out. It should be noted that the microcomputer 1 and the external storage device 7 transfer and receive data as necessary, and all actual measurement data by the microcomputer 1 and the processing result of the output data processing unit 12 are transferred and stored in the external storage device 7 as necessary. Further, the stored contents of the external storage device 7 are transferred to the microcomputer 1 as necessary and appropriately processed, and can be displayed or printed out by the display device 5 or the printer 6.

FIG. 2 is a diagram showing an example of printout data by the printer 6 based on the processing result of the statistical calculation processing by the microcomputer 1. As shown in the figure, a plurality of item names desired to be printed out among the monitor items are printed on the print paper 20. In the illustrated example, the heater (1) temperature, the heater (2) temperature, the heater ( 3) Temperature, heater (4) temperature, ..., Mold opening completion position, charge rotation speed (1), charge rotation speed (2), charge rotation speed (3)
Is printed with the unit and the allowable maximum value / allowable minimum value added below it. The monitor items desired to be printed can be arbitrarily selected by the operator. In addition to the above, for example, primary injection time, cushion position, charge completion position, charge time, cycle timer, oil temperature, secondary pressure ( The holding pressure) switching position, hopper temperature, etc. can be printed out.

In the example shown in FIG. 2, the average value x _AVE , the maximum value x _max , and the minimum value x _min are defined by the allowable maximum value and the allowable minimum value as data representative of the measured data for 20 shots. Dot printing is done for each monitor item so that it fits within a predetermined numerical range. Therefore, 2 for each monitor item
Data representing measurement data for every 0 shots is vertically dot-printed in time series, and data for many shots can be compressed and printed out within a short paper range. Therefore, since it is only necessary to refer to the short paper range when considering the data, it is possible to easily grasp the overall tendency of the measurement data over a large number of shots, and it is possible to save print paper and print time. In FIG. 2, the shot number for every 100 shots is printed at the left end, and the time corresponding to this is printed at the right end.

FIG. 3 is an enlarged view of the dot print data of the average value x _AVE , the maximum value x _max , and the minimum value x _min , which is representative of the measurement data for every 20 shots.
1 is a monitor item name print field, 22 is a unit print field, 23 is an allowable maximum value print field, 24 is an allowable minimum value print field, and 25 is 20.
Dot data showing average value x _AVE for each shot, 26
Is dot data showing the maximum value x _max for every 20 shots, and 27 is dot data showing the minimum value x _min for every 20 shots. Further, 28 is a line showing the maximum allowable value, 29 is a line showing the minimum allowable value, and 30 is a line showing an intermediate value between the maximum allowable value and the minimum allowable value. In the present embodiment, these are defined by the lines 28 and 29. The predetermined numerical width is commonly set to 15 mm for each monitor item.

Further, in the present embodiment, in the measurement data of a predetermined plurality of shots (20 shots in the illustrated example),
When there is one or more data outside the predetermined allowable range, in the vicinity of the dot data 25, 26, 27 representing the measurement data for the predetermined plural shots,
The defect appearance mark 31 indicating this is printed by, for example, "x". If the printer 6 can perform color printing of two or more colors, it is preferable to print the defect appearance mark 31 in a different color from the dot data 25, 26, 27.

As described above, if even one piece of measurement data for a plurality of shots is out of the allowable range (data indicating a defect), representative dot data of the measurement data for the predetermined plurality of shots. Since the defect appearance mark 31 is added near 25, 26, and 27, if there is defective data, it can be found at a glance. If there is defective data, the data around the shot is printed out from the detailed data stored in the external storage device 7, and the measured data is examined in detail.

In FIGS. 2 and 3, the measured data for 20 shots are grouped together, but the number of predetermined plural shots grouped together is arbitrary and may be 5 or 100. Of course. Further, as representative dot data of the measurement data for a predetermined plurality of shots, the variation range R of the actual measurement value x, the central value (median) Me, the variance v, the standard deviation σ, R / X, 3σ /
It may be X or the like.

Further, as a form of print output or dot output displayed on the display, each dot may be connected by a straight line or a curved line and output in the form of a polygonal line graph or a smooth curve graph.

[0025]

As described above, according to the present invention, it is possible to easily grasp the whole (for example, one day) tendency of the measurement data over a large number of shots, save the printing paper and the printing time, and The remarkable effect is that it is possible to detect reliably and quickly without overlooking whether there is bad data.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing an example of printout data according to an embodiment of the present invention.

FIG. 3 is an enlarged explanatory diagram of printout data according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing an example of printout data according to a conventional technique.

[Explanation of symbols]

 1 Microcomputer (microcomputer) 2 Sensor group 3 Driver group 4 Key input device 5 Display device 6 Printer 7 External storage device 8 Molding condition setting storage section 9 Molding process control section 10 Measured value storage section 11 Arithmetic processing section 12 Output data processing section

Claims (6)

[Claims] 1. A microcomputer for driving and controlling each part of a molding machine on the basis of each set molding operation condition value and measurement information from each sensor, the microcomputer for each shot during continuous automatic operation. In an injection molding machine having a function of capturing and storing measurement data of a plurality of predetermined monitor items and performing a calculation process of the measurement data, the microcomputer, the captured measurement data, for each monitor item Ejection characterized by performing statistical calculation processing collectively for a predetermined plurality of shots, making the distribution state of the dot data representative of the measurement data for the predetermined plurality of shots visible, and enabling output by a printer or display device. Measuring data processor of molding machine. 2. The injection molding according to claim 1, wherein the dot data representing the measurement data for the predetermined plurality of shots is continuously and vertically output so as to be within a predetermined numerical width. Data processing equipment of machine. 3. The measurement data processing of an injection molding machine according to claim 2, wherein the dot data representing the measurement data for the predetermined plurality of shots is an average value of the measurement data for the predetermined plurality of shots. apparatus. 4. The dot data representing the measurement data for the predetermined plurality of shots according to claim 3,
A measurement data processing device for an injection molding machine, wherein the average value and the maximum value and the minimum value in the measurement data for a predetermined plurality of shots are output. 5. The dot data representative of the measurement data for the predetermined plurality of shots according to claim 2, wherein the dispersion, variation range, center value (median), standard deviation, and the like of the measurement data for the predetermined plurality of shots are included. A measurement data processing device for an injection molding machine, which is at least one of data obtained by further processing the calculation result of 1. 6. The measurement data for the predetermined plurality of shots according to claim 2, wherein if the measurement data for the predetermined plurality of shots includes one or more data that are out of a predetermined allowable range. A measurement data processing device for an injection molding machine, wherein a display indicating this is also output in the vicinity of the representative dot data.