JP2997435B2 - Operating time analyzer for injection molding machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an operating time analyzer for an injection molding machine.

[0002]

2. Description of the Related Art In order to perform periodical inspection and production control of an injection molding machine rationally, it is necessary to accurately record the operating state of the injection molding machine and how long it has been operating. Need to be analyzed.

In a conventional injection molding machine, an operator of the injection molding machine operates a timer, a stopwatch or the like in response to a driving operation, and measures an automatic operation time or a manual operation time of the injection molding machine, a loss time of occurrence of an alarm, and the like. The measurement was performed by one's own hand and recorded in the work daily report, but the operator sometimes erroneously operated a timer, a stopwatch, or the like, and it was difficult to obtain a correct measurement result.

In addition, in a normal injection molding operation, one operator generally manages about 10 injection molding machines, so that it is troublesome to operate a timer, a stopwatch and the like and to write a daily work report. However, in the case where the operation time is analyzed by manual calculation based on the raw time data described in the daily work report or the like, misreading of data and erroneous calculation are likely to occur.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to accurately measure and store the operation time for each operation state without the need of an operator. It is an object of the present invention to provide an operating time analyzing apparatus for an injection molding machine which can automatically perform the operating time at the center.

[0006]

According to the present invention, a plurality of injection molding machines are connected to a centralized control device via a communication line. An operating state detecting means is provided which divides each of the operating states in accordance with the type of the stopped state and detects the operating state of each type. The centralized control device includes means for reading the detection state of each injection molding machine by each of the operation state detection means, and automatically reads the read operation state for each injection molding machine and for each type of operation state. State-by-state operating time storage means for temporarily integrating and storing, and data output means for displaying and outputting an integrated time for each type of operating state for each injection molding machine and each type stored in each state-based operating time storage means. The accumulated time for each operation state of each injection molding machine and each type can be displayed.

While the operating state detecting means detects each type of operating state of the injection molding machine on the side of the injection molding machine, the elapsed time is automatically integrated and stored for each type of operating state. Operating time storage means, the centralized management device ,
Means for reading the elapsed time of each type to be stored in the state by operation time storage means of each injection molding machine, each injection molding machine,
There may be a data output means for displaying and outputting the accumulated time for each type of operation state.

Further, a means for detecting the power-on state of the injection molding machine is provided as one of the operating state detecting means, and the centralized control device is provided with a relation between the integrated time of the power-on state and the integrated time of other operating states. Means for calculating the ratio of the integration time for each of the various operating states, and the data output means outputs and displays the ratio of the integration time for each of the various operating states. Further, the central control device stores each injection molding machine,
Integrated value storage means for storing the integrated value of the elapsed time for each type of operating time for each day for one month, and the integrated value for each injection molding machine and each type of operating state at the end of the month. Monthly integrated value storage means for counting and calculating integrated values of each type of operating state for each month and storing the integrated values for a plurality of months is provided, and the data output means is provided for each injection molding machine stored in the monthly integrated value storage means. Every month, every month,
The integrated value of the operating state for each type may be displayed and output.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a main part of an electric injection molding machine 19 according to an embodiment to which an operation time analyzer according to the present invention is applied. In FIG. 1, reference numeral 27 denotes a fixed platen, reference numeral 28 denotes a movable platen, reference numeral 29 denotes an injection cylinder, and reference numeral 30 denotes a screw.
Has a band heater 34 as a heating means and a thermocouple 35 as a temperature detecting means.

The movable platen 28 is moved along a tie bar (not shown) by a shaft output of a mold clamping servomotor M1 via a drive converter 31 constituted by a ball nut & screw, a toggle mechanism and the like. The screw 30 is moved in the axial direction by a drive conversion device 32 composed of a ball nut & screw, a boss & serration, and the like, and an injection servomotor M3, while being constituted by a gear mechanism 33 and a measuring rotation servomotor M2. The rotating mechanism for the weighing and kneading is performed by the driving mechanism independent of the axial movement.

The numerical control device for controlling the driving of the injection molding machine 19 comprises a microprocessor 12 for numerical control and a microprocessor 14 for a programmable machine controller. The microprocessor 14 for the programmable machine controller has a sequence of the injection molding machine. A ROM 17 storing a program for controlling the operation and the like and a RAM 8 used for temporarily storing data are connected via a data bus. The RAM 8 is a nonvolatile memory.

Further, a microprocessor 1 for numerical control
Reference numeral 2 denotes a ROM 15 storing a management program for controlling the entire operation of the injection molding machine 19, a RAM 4 used for temporary storage of data, a servo circuit 1 for a servomotor M1 for mold clamping, A servo circuit 2 for the servo motor M2 and a servo circuit 3 for the injection servo motor M3 are connected via a servo interface 11, and pulse coder P1, P
2, the feedback signal from P3 is the servo circuit 1,
Input is made to each of 2 and 3. FIG. 1 shows only the servo circuit for the mold clamping servo motor M1, the servo circuit for the metering rotation servo motor M2, and the servo circuit 3 for the injection servo motor M3. The motors for adjusting the thickness and for touching the nozzles are omitted.

A microprocessor 12 for numerical control and a microprocessor 14 for a programmable machine controller are connected via a bus arbiter controller 13, and each of a nonvolatile shared RAM 5, an input circuit 6, and an output circuit 7 has a data bus. It is connected to the bus arbiter controller 13 via the arbiter. Further, a torque limit circuit is built in the servo circuit 3, and a torque limit value for regulating the maximum injection pressure by the injection servomotor M 3 is input from the output circuit 7. ON / OFF of the band heater 34 is controlled by the microprocessor 14 for the programmable machine controller via the output circuit 7 and the heater circuit 10, and the temperature of each part of the injection cylinder 29 detected by the thermocouple 35 is A / D converted. Input to the input circuit 6.

An input circuit 6 of the numerical control device is further adapted to receive a current time from a clock device 9. The timepiece device 9 is a timepiece device having an automatic calendar function for automatically updating the year, month, and day values based on preset data, in addition to generation of the current time relating to hours, minutes, and seconds. The bus arbiter controller 13 selects a data bus to manage data input / output between the elements, and the operator panel controller 16 configures an interface between the numerical control device main body and the manual data input device 18 with a CRT display device. ing. Various setting conditions related to the injection molding operation are determined by the operator.
Shared RA via manual data input device 18 with T display
M5 is appropriately set and input.

Manual data input device 18 with CRT display
Includes a terminal provided with a CRT display device, a numeric keypad for data input, a soft key for command input, and the like, and separately provided from the main body of the injection molding machine, and an operation panel provided on the side of the main body of the injection molding machine. It is the name shown. The operation panel on the main body of the injection molding machine has a semi-automatic operation switch that executes only one cycle of the injection process from mold clamping to eject based on a program, an automatic operation switch that repeatedly executes this injection process, A manual operation switch is provided.

When the manual operation keys for mold clamping, metering rotation, injection, ejector, etc. are selectively operated with the manual operation switch being selected, the servo motors of each axis are driven at a preset speed. However, the feed of each axis by the manual operation key is performed according to the conditions set in the shared RAM 5 and the ROM 15.
Is managed by the microprocessor 12 for numerical control based on the management program stored in the. The manual operation key is provided on the operation panel of the injection molding machine main body together with the semi-automatic operation switch, the automatic operation switch, and the manual operation switch. The injection molding machine 19 has an abnormality detection function of detecting an abnormality of each part of the injection molding machine and outputting an alarm, a counting function of integrating and storing the number of product shots, a cold start prevention function, and the like.

The abnormality detection function is used when an abnormality of the numerical controller is detected by the self-diagnosis program, or when an abnormality is detected in the servomotor of each axis, for example, when foreign matter enters between the molds or when the nozzle is Due to clogging and solidification of the resin, the positional deviation during driving of the servomotor M1 for mold clamping, the servomotor M2 for measurement and the servomotor M3 for injection, etc. increases abnormally, or the servomotor of each axis during manual operation increases. It operates when a movable unit to be driven overtravels and a limit switch is activated. When such an abnormality is detected, a microprocessor 12 for numerical control or a programmable machine controller for managing the operation is operated. Microprocessor 14 sets an alarm detection flag in shared RAM 5.

A counter for accumulating and storing the number of product shots is automatically incremented each time one cycle of the injection process by the injection molding machine 19 is completed, and this value is set in advance by the manual data input device 18 with a CRT display device. When the production number is reached, the injection molding machine 19 automatically stops with the mold open, and the microprocessor 14 for the programmable machine controller sets the production completion flag in the shared RAM 5. When the production number is not set, or when the production number is reset by an operation from the manual data input device 18 with a CRT display device, the counter value and the production completion flag are reset until the operation is canceled. The automatic operation of the injection molding machine 19 is performed without limitation.

The counter that accumulates and stores the number of product shots does not function unless the number of productions is set. Prior to the start of the injection molding operation, the heating temperature of the injection cylinder 29 is set by the manual data input device 18 with a CRT display device, the power to the band heater 34 is turned on, and then the injection cylinder 29 detected by the thermocouple is turned on. When the temperatures of all the zones reach a predetermined range (for example, ± 10% of the set value) with respect to the set value, the cold start prevention timer sets a predetermined time (normally 15 minutes).
Min. To 25 min.), During which the injection molding operation of the injection molding machine 19 is prohibited. The time from when power is supplied to the band heater 34 until the temperatures of all the zones of the injection cylinder 29 reach a predetermined width (for example, ± 10%) with respect to the set value, and the cold start prevention timer operates. Between the shared RAM5
, The cold start prevention flag is set, and the injection molding machine 19 cannot perform the injection molding operation. The cold start prevention flag is automatically reset at the end of the time measurement by the timer, and when the power is turned on to the band heater 34 again,
This flag is set again.

In such a configuration, the injection molding machine 19
A microprocessor 12 for numerical control that operates based on a management program stored in a ROM 15, a microprocessor 14 for a programmable machine controller that operates based on a sequence program stored in a ROM 17, and settings stored in a shared RAM 5. The microprocessor 12 for numerical control performs pulse distribution to each axis via the servo interface 11 based on the values and the like, and the microprocessor 14 for the programmable machine controller is driven by managing the entire sequence operation. Controlled.

The "state detection processing" shown in FIG. 2, the "operation time storage processing" shown in FIGS. 3 to 5, and the "display request detection processing" shown in FIG. 6 are stored in the ROM 17 together with a conventional sequence program. 4 is a flowchart showing a part of the tasks described above. At least the task of “state detection processing” includes a microprocessor for a programmable machine controller (hereinafter, referred to as a CPU for PMC) 14 as long as the injection molding machine 19 is powered on. Is repeatedly executed at intervals of a minute time Δt.

The processing shown in FIGS. 2 to 6 is an embodiment of the present invention, and is processing specific to the embodiment. Hereinafter, the processing operation of the operating time analyzer according to the present embodiment will be described with reference to the flowcharts of FIGS. The PMC CPU 14 determines whether or not the cold start prevention flag is set in the shared RAM 5 in the “state detection process” for each predetermined cycle, that is, the temperature rising process for the band heater 34 to heat the injection cylinder 29. Is determined (step S1). If the band heater 34 is in the process of increasing the temperature, the execution period Δt is stored in the temperature increase time storage register Ta.
That is, the required time required to execute a series of tasks, the elapsed time from the execution of the “state detection process” of the previous cycle to the execution of the “state detection process” of the current cycle is added, and the heating time of the heater is increased. Is accumulated (step S7), and the “state detection process” of this cycle is terminated.

Since the injection molding operation of the injection molding machine 19 is prohibited in the process of raising the temperature of the band heater 34 according to the above-described configuration, as long as the result of the determination in step S1 is true, another operation for detecting the specific operation state is performed. (The determination process after step S2 in FIG. 2) need not be performed.

When the process of raising the temperature of the band heater 34 is completed and the cold start prevention flag is reset, the determination result of step S1 in the "state detection process" is always false, and the PMC CPU 14 In the “state detection processing”, another determination processing for detecting a specific operation state of the injection molding machine is executed.

The CPU 1 for PMC that has shifted to step S2
4 indicates whether the alarm detection flag has been set,
That is, it is determined whether or not an abnormality is detected in each part of the injection molding machine 19. If an abnormality is detected, the execution period Δt is added to the alarm occurrence time storage register Tb, and the alarm occurrence time is accumulated and stored. (Step S8), the “state detection process” of this cycle ends. Since the operation of the injection molding machine 19 is automatically stopped when the alarm detection flag is set, another determination process for detecting a specific operation state of the injection molding machine (determination process after step S3 in FIG. 2). You don't need to do that.

If no alarm is detected in the "state detection process" of this cycle, the PMC CPU 14 further proceeds to the determination process of step S3, and determines whether or not the production completion flag has been set. It is determined whether a predetermined number of injection molding operations have been completed. If it is determined that the predetermined number of injection molding operations have been completed, the PMC CPU
14 adds the execution period Δt to the stop time storage register Tc that stores the stop time after the completion of the production, accumulates and stores the stop time after the completion of the production (step S9), and ends the “state detection process” of this cycle. I do. Injection molding machine 19 after production is completed
, The production completion flag must be reset by an operation from the manual data input device 18 with a CRT display regardless of manual operation, semi-automatic operation, or automatic operation. Times such as driving, semi-automatic driving, and automatic driving are not added to the stop time storage register Tc. Further, it is not necessary to execute the determination processing after step S4 in FIG. 2 when the determination result of step S3 is true.

On the other hand, if the production completion flag is not detected in the “state detection process” of this cycle, any of manual operation, semi-automatic operation, and automatic operation can be selected. It is determined which of the manual operation switch, semi-automatic operation switch, and automatic operation switch provided on the operation panel of the molding machine is operating, and if the operation is in the manual operation, the execution cycle is stored in the manual operation time storage register Td. Δt is added to accumulate and store the time of the manual operation (step S4, step S10). If semi-automatic operation is being performed, the execution period Δt is added to the semi-automatic operation time storage register Te to accumulate and store the time of the semi-automatic operation. (Step S5, Step S11). If the automatic operation is being performed, the execution period Δt is stored in the automatic operation time storage register Tf.
Is added and the automatic operation time is accumulated and stored (steps S6 and S12). If none of the operation switches is operated, the execution cycle Δt is added to the register Tg for storing the other operation times (step S6). S13).

In the "state detection process" shown in FIG. 2, the order of the determination process for detecting a specific operation state such as a heater temperature rising, an alarm being generated, production completed, and the like can be appropriately set and changed. . As a result, it is possible to arbitrarily set the priority of the operating state to be measured according to the purpose.

During execution of the "state detection process" in this manner, the PMC CPU 14 repeatedly executes the "operation time storage process" task as shown in FIGS. The current data relating to hours, minutes, and seconds is read from the device 9, and it is determined whether or not this value matches a preset data totaling time (step S14).
If the times do not match, the processing after step S15 is not executed, and the “operation time storage processing” of this cycle ends. The resolution of the hour, minute, and second in the clock device 9 is P
This is consistent with the execution cycle of the “operation time storage process” in the MC CPU 14, and the result of the determination in step S14 becomes true only once a day. When the current data on the hour, minute, and second of the clock device 9 matches the preset data totaling time, the PMC CPU reads the current data on the date from the clock device 9 and stores it as the date index d (step S15).

Next, the PMC CPU 14 stores the value of the temperature rise time storage register Ta that stores the integrated time of the specific operation state for one full day from the data aggregation time of the previous day to the current data aggregation time, and the alarm occurrence time. The register Tb stores the value of the register Tb, the value of the stop time storage register Tc, the value of the manual operation time storage register Td, the value of the semi-automatic operation time storage register Te, the value of the automatic operation time storage register Tf, and other operation times. Values, registers Ta through T
Each value of the power-on time for one day, which is the added value of g, is made to correspond to the date index d.
Each storage area Tad, Tbd, Tcd, Tdd, Ted, of the file of the nonvolatile RAM 8 for storing the data of the month
Tfd, Tgd, and Tσd are updated and stored (step S1).
6) Initialize all the values of the registers Ta to Tg as temporary storage means (step S17).

The PMC CPU 14 that has executed the processing of step S17 further calculates the percentage of the power-on time for one day, the percentage of the heater heating time for one day of power-on time, the percentage of the alarm generation time, and the percentage after the production is completed. The percentage of the stop time, the percentage of the manual operation time, the percentage of the semi-automatic operation time, the percentage of the automatic operation time, and the percentage of the other operation time are calculated, and the nonvolatile R is calculated according to the date index d.
AM8 file storage areas Tσ'd, Ta'd, T
b'd, Tc'd, Td'd, Te'd, Tf'd, T
The updated information is stored in each of g'd (step S18). That is, the operating time analyzer of the present embodiment calculates the ratio of the integrated time for each specific operating state based on the relationship between the integrated time in the power-on state stored in the operating time storage unit for each state and the other integrated times. It is also an operating time analyzer.

As shown in FIG. 7, 31 files of storage areas from address d = 1 to 31 are set in the file of the nonvolatile RAM 8 for storing data for one month every day. Are values read from the clock device 9 having the auto calendar function.
In each of the months 7, 8, 10, and 12, data for 31 days is stored. In each of the months 4, 6, 9, and 11, only data for 30 days is stored. The number of days of data stored differs depending on the circumstances of leap years.

Next, the PMC CPU 14 determines whether or not the current value d of the date read this time matches the last date of the current month (step S19). If these values do not match, the process from step S20 is performed. Is not executed, and the “operation time storage process” of this cycle is ended. On the other hand, if the decision result in the step S19 is true, the PMC CPU
14 further proceeds to step S20, reads the current data on the month from the clock device 9 and stores it as a month index m,
Each storage area Tσm, T of a file of the nonvolatile RAM 8 for storing data for one year every month based on the concept as shown in FIG.
am, Tbm, Tcm, Tdm, Tem, Tfm, Tg
After all the values of m are initialized based on the value of the index m (step S21), 1 is set to the data reading index i (step S22).

Next, the PMC CPU 14 stores the data of the non-volatile RAM 8 for one month each day until the value of the data reading index i reaches the last date d of the current month (step S25) (FIG. 7) storage areas Tσi, Tai, Tbi, Tci, Tdi, Tei, T
A file in the nonvolatile RAM 8 that sequentially reads each value of fi and Tgi and stores data for one year every month (FIG. 8)
), Storage areas Tσm, Tam, Tbm, Tcm,
Each of Tdm, Tem, Tfm, and Tgm is individually integrated and stored (step S23), and the value of the data reading index i is incremented (step S24).

Therefore, each storage area Tσm, Tam, Tb of a file (see FIG. 8) for storing data of the current month in the nonvolatile RAM 8 for storing data for one year every month.
For each of m, Tcm, Tdm, Tem, Tfm, and Tgm, the integrated value of the power-on time from the first day to the last day of the current month, the integrated value of the heater heating time, and the occurrence of an alarm Integrated value of time, integrated value of stop time after production completion, integrated value of manual operation time, integrated value of semi-automatic operation time,
Each of the integrated value of the automatic operation time and the integrated value of the other operation time is stored.

Next, the PMC CPU 14 calculates the total time of the current month on the basis of the number of days of the current month, that is, the value of the last date d (step S26). Percentage of power-on time, percentage of heater heating time to January power-on time, percentage of alarm generation time, percentage of stop time after production completion, percentage of manual operation time, percentage of semi-automatic operation time, automatic operation Each of the percentage of time and the percentage of other operation time is calculated, and the nonvolatile RA
Each storage area Tσ′m, T of the file M8 (see FIG. 8)
a'm, Tb'm, Tc'm, Td'm, Te'm, T
f'm and Tg'm are updated and stored (step S
27), the “operation time storage process” of this cycle ends.
If the value of the last date d is 30 or less, a file in the nonvolatile RAM 8 (see FIG. 7) for storing data for one day every month at the stage of ending the "operation time storage process" of this cycle. ), The data after the address d + 1 is erased and initialized.

At the request of the operator, the operating time analysis data of each month of the current month (sometimes including a part of the previous month) and the operating time analysis data of each month of the current year (sometimes including a part of the previous month) are obtained. If desired, a soft key of the manual data input device 18 with a CRT display device is operated to select a display screen of the operating time analysis data, and these data are displayed on the CRT display device.

The PMC CPU 14 performs a "state detection process".
The "display request detecting process" as shown in FIG. 6 is repeatedly executed at predetermined intervals substantially in parallel with the "operation time storing process" and the manual data input device with a CRT display device in the determination process of step S01. When the display request from the display unit 18 is detected, the display screen of the CRT display device is switched, and the operating time analysis data for one month for one day and one year for one year are displayed on the data display screen as shown in FIG. The operating time analysis data is displayed on the CRT display device (step S03).

If the time required to display the operation time analysis data is earlier than the preset data collection time, the data collection on the day has not been completed, so the operation time analysis data for one month per day is displayed. As shown in FIG. 9, data of each day from the first day of the current month to the day before the current month and data of each day after the corresponding day of the previous month are displayed on the display screen. For example, if the data totaling time is set to 19: 00: 00: 00 and the display of the operation time analysis data is requested at 18: 30: 00: 00 on July 15, from July 1 to July 14 Are displayed, and the respective day data from June 15 to June 30 are displayed. Since the month of May is until the 31st of June and the day of June is the 30th of June, the file of FIG. 7 which stores the operating time analysis data for one month every day contains the data for May 31 in the record of the address d = 31. However, if the value of the last date d is 30 or less, the data after the address d + 1 is deleted at the end of the “operation time storage processing”. Is executed, the data for May 31 is deleted, and when the display of the operation time analysis data is requested at 18:30 on July 15, from July 1 to July 14 Data for each day from June 15 to June 3
Only data for each day up to the 0th day will be displayed. That is, the display screen displaying the operating time analysis data for one month every day displays the data for each day of the latest January.
If the time required to display the operation time analysis data is later than the preset data aggregation time, each day data from the first day of the current month to the current day of the month and each day data after the corresponding day of the previous month tomorrow. Will be displayed.

The same applies to the operation time analysis data for one year for each month. If the time required to display the operation time analysis data is earlier than the preset data totaling time, the current year is displayed. While data for each month from January to the previous month and the corresponding month for the previous year are displayed,
If the time requested to display the operating time analysis data is later than the preset data aggregation time, the month data from January of the current year to the current month and the month data of the previous month corresponding to the current month of the previous year are displayed. The Rukoto. That is, 1 every month
The display screen that displays the operating time analysis data for one year is the latest one
Each month data for the year is displayed.

The value of the time data on the CRT display screen in FIG. 9 is obtained by converting each data into the unit of hour, minute, and second, and displays the data as shown in FIG. If another soft key of the manual data input device 18 with a CRT display device is operated in the selected state, the PMC
The CPU 14 detects this in the determination processing of step S02, and shifts to another selection processing according to the operation.

As described above, the data output means in this embodiment is a manual data input device 1 with a CRT display device.
8 and the integrated time of each state in the injection molding machine 19 and the ratio thereof are totaled for a predetermined period every day or every month, and are shown in FIGS.
Is stored in a file as shown in FIG.

Further, by disposing a printer together with the manual data input device 18 with a CRT display device, step S18 and step S18 in the "operation time storage process" are performed.
Every time the process 27 is executed, the integrated time and the ratio of each state may be printed out for a predetermined period every day or every month.

As shown in FIG. 7, if a file for storing data for one month per day is provided for each month, data for each day can be stored for a whole year. In this case, it is also possible to calculate the integrated value of the various operating hours for each day of the week, the average movable time thereof, the ratio of each weekday to the various operating hours for one week, and the like.

As described above, the clock device 9 having the calendar function
Has been described with reference to an embodiment in which data is aggregated by detecting the current date and month using
Even when a clock device that is automatically reset by 24-hour measurement is used, the same processing as in the embodiment can be performed.

The processing in the case of using a clock device for 24-hour measurement will be briefly described below. First, since the date and the month are not involved in the "state detection processing" shown in FIG. 2, the "state detection processing" in FIG. 2 is automatically reset by 24-hour measurement using a clock device. There is no problem applying it to the examples as is. In contrast, 2
In the embodiment using the clock device that is automatically reset by four-hour measurement, the “operation time storage process” shown in FIGS.
Cannot detect the current date from the clock device in the process of step S15, and the process of step S19 cannot detect the last date of the current month.

Therefore, in the embodiment using the clock device which is automatically reset by the 24-hour measurement, the "operation time storage processing" shown in FIG. 3 and the "operation time storage processing" shown in FIGS. Is separated into separate tasks, the determination process of step S19 is removed from the "operation time storage process" shown in FIG. 3, and the value of the date index d is sequentially incremented instead of the process of step S15. Execute the process. The value of the date index d when the power is turned on for the first time is 0.

This makes it possible to update the value of the date index d each time the set time is detected in the determination processing of step S14 and to automatically execute the processing of steps S16 to S18. In order to adjust the value of d to the actual date, it is necessary to initialize the value of the date index d at the beginning of the month.

Therefore, instead of the processing of step S20 in the "operation time storage processing" shown in FIGS. 4 and 5, a ten-key input from the manual data input device 18 with a CRT display device is detected and the month index m And the number of days in the m month d
The processing for setting the step S26 and the step S26
27, a process for initializing the value of the date index d to 0 is inserted.

With this configuration, if the power of the injection molding machine 19 is turned on on the first day of an arbitrary month to start using the same, the arrival of the data totaling time is detected in the determination processing of step S14. The value of the date index d is sequentially updated every time,
The processing of steps S16 to S18 can be automatically performed in accordance with the value of the date index d. In addition, in the processing replacing step S20, the operator sets the old month values m and m If the number of days d in the month is set and input, the data from the first day to the last d-th day of the m-th month are automatically integrated in the processes of steps S21 to S27 and totaled. Since the value of the index d is automatically initialized to 0 in the processing before step S27, the date index d is set on the first day of the (m + 1) th month.
Is reset to 1, and the processing for one month can be repeatedly executed in the same manner.

In the embodiment using the clock device which is automatically reset by the 24-hour measurement, some attention is required when setting and inputting the month index m and the number of days d of the m month with the ten keys. The operation and effect are substantially the same as those in the case where the timepiece device 9 having the calendar function is used. In the above embodiment, data is totaled every day and every month, but it is also possible to total data every week and every year.

The type of the specific operation state to be detected can be arbitrarily set according to the configuration of the injection molding machine and the like.
By discriminating the combination of the specific operation states, it is also possible to calculate the time consumed for condition setting and setup, the ratio thereof, and the like, and to output the calculated time. A dedicated external switch is provided to calculate the time and ratio thereof consumed for setting conditions and setting up, a key operation of the manual data input device 18 with a CRT display device is detected, and furthermore, injection molding is performed. The state detection signal inside the machine 19 may be used.

In each of the above embodiments, the power-on time T per day
From the values of σd and the power-on time Tσm for one month, the power-off time contrary to these values can be known. It is also possible to input the reason for power-off from an external switch or a key of the manual data input device 18 with a CRT display before the power-off, and store the power-off time in the nonvolatile RAM 8 for each reason. It is possible. For example, the current time of the clock device 9 is detected according to the reason input from the external switch or the manual data input device 18 with a CRT display just before the power is turned off, and this value is stored in the nonvolatile RAM 8 and The current time is read from the clock device 9 immediately after the power is turned on again, the value of the current time stored at the time of power-off is subtracted from this value, and the value is stored in the nonvolatile RAM 8 according to the reason for the power-off. it can. As the reason for the power-off, various items such as power-off for periodic maintenance, power-off for no production schedule, and power-off for fault repair may be set and stored in advance.

In the case where a large number of injection molding machines are installed side by side to perform an injection molding operation, it is not always necessary to provide an operating time analyzer for each injection molding machine, and a single centralized management device is used. You can also perform data aggregation.

FIG. 10 shows a plurality of injection molding machines 19a, 19
It is a block diagram showing an example in which a single centralized management device 26 is provided for b, 19c...
3, a manual data input device 24 with a CRT display device and an external storage device 25 such as a floppy disk or a hard disk, and a plurality of injection molding machines 19a,
. And the centralized control device 26 are connected via a data transmission path from the injection molding machines 19a, 19b, 19c, and the interface 20 on the centralized control device 26 side.

The hardware configuration of the injection molding machines 19a, 19b, 19c...
Is approximately equivalent to First, when data is to be totalized only by the central control device 26, the injection molding machine 19 is required.
a, 19b, 19c, etc., a heater temperature rise detection signal, an alarm generation signal, a production completion signal, a manual operation signal, a semi-automatic operation signal, an automatic operation signal, etc. are input to the central control device 26 together with the codes of the injection molding machines. And centralized management device 2
6 is executed for each code of each of the injection molding machines 19a, 19b, 19c... At predetermined intervals as shown in FIGS. The results of data tallying are stored in files such as those shown in FIGS. 7 and 8 provided for each code. In addition, the tally result is input to a manual data input device 2 with a CRT display device.
In the case of displaying on the CRT display screen of No. 4, the code of the injection molding machine may be input from the MDI to selectively display only the data on the desired injection molding machine.

In this case, all the software required for the data summarizing operation is stored in the ROM 22 of the central control device 26.
And the injection molding machines 19a, 19
.., 19c... only need to be provided with means for detecting a specific operating state, and are not limited to electric injection molding machines in which internal processing is performed by a control device, and various conventionally known injection molding machines. Machine.

Further, the injection molding machines 19a, 19b, 19c
If each of the... Is an electric type in which internal processing is performed by the control device, the processing required for the data aggregation work is shared between the injection molding machine and the central control device 26, so that both control devices The burden can be reduced.

For example, each of the injection molding machines 19a, 19b, 19c... Is made to execute only the processing shown in FIG. From the management device 26, the injection molding machine 19a, 1
The control devices 9b, 19c,... Are polled to collect data for each injection molding machine, and each time data is collected, the processing shown in FIGS. 3 to 5 is performed for each injection molding machine.
It can be stored in the external storage device 25.

Further, in a case where data is collected using the central control device 26, the process of the central control device 26 can be executed regardless of whether or not the power of the injection molding machine is turned on. This is a more preferable embodiment when it is necessary to store the reason for the power-off of the injection molding machine, its time, and the like. The reason for the power-off is transmitted from the injection molding machine to the central control device 26, and the central control device 26 can easily manage the power-off reason for each injection molding machine, the time, etc. in response to the reason. Further, if a detecting means for externally detecting the operation state of the injection molding machine regardless of whether the power is turned on or not is provided, the state of the injection molding machine can be continuously detected. For example, by disposing a limit switch or the like for detecting the attachment / detachment of the mold on the fixed platen 27 or the movable platen 28, it is possible to manage the time of the mold attachment / detachment work performed after the power is turned off for each injection molding machine. It is.

[0061]

The operating time analyzing apparatus for an injection molding machine according to the present invention automatically accumulates and stores the elapsed time for each of various operating states during the operation of the injection molding machine and during the stoppage of the operation. The integrated time is displayed and output, so that there is no measurement error due to erroneous operation, such as when an operator operates a timer or stopwatch in response to a driving operation and performs measurement. The troublesome work of creating a troublesome daily report to record the information is also eliminated.

Since the ratio of the accumulated time for each specific operation state can be automatically calculated and displayed, the operating time can be manually calculated based on raw time data described in a daily work report. The reliability of the analysis result can be improved in each stage without misreading the data or making a calculation error as in the case of performing the work. In addition, since the tabulation and analysis are performed by the central control device, even when the injection molding machine breaks down or a power failure occurs, its operation status is grasped, and the accumulated time for each injection molding machine and each operation status is grasped. Therefore, production control such as inspection timing and production plan of the injection molding machine becomes easy.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a main part of an electric injection molding machine according to one embodiment of the present invention.

FIG. 2 is a flowchart showing an outline of a state detection process performed by the PMC CPU according to the embodiment;

FIG. 3 is a flowchart illustrating an outline of an operation time storage process performed by a PMC CPU according to the embodiment;

FIG. 4 is a continuation of a flowchart showing an outline of an operation time storage process;

FIG. 5 is a continuation of a flowchart showing an outline of an operation time storage process;

FIG. 6 is a flowchart showing an outline of a display request detection process executed by the PMC CPU according to the embodiment;

FIG. 7 is a conceptual diagram showing a file for storing data for one month each day.

FIG. 8 is a conceptual diagram showing a file storing data for one year every month.

FIG. 9 is a conceptual diagram showing an example of a data display state.

FIG. 10 is a block diagram showing an example of an operation time analyzer by a centralized management device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Servo circuit 2 Servo circuit 3 Servo circuit 4 RAM 5 Shared RAM 6 Input circuit 7 Output circuit 8 Non-volatile RAM 9 Clock device 10 Heater circuit 11 Servo interface 12 Microprocessor for numerical control 13 Bus arbiter controller 14 For programmable machine controller Microprocessor 15 ROM 16 Operator panel controller 17 ROM 18 Manual data input device with CRT display device 19 Electric injection molding machine 20 Interface 21 Microprocessor 22 ROM 23 RAM 24 Manual data input device with CRT display device 25 External storage device 26 Centralized management Device 27 Fixed platen 28 Movable platen 29 Injection cylinder 30 Screw 31 Drive conversion device 32 Drive conversion device 33 Gear mechanism 34 Band Heater 35 thermocouple

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuo Kubota 3580 Kobaba, Oshino-mura, Oshino-mura, Minamitsuru-gun, Yamanashi Prefecture Inside FANUC Co., Ltd. 3580 Kobaba FANUC CORPORATION Product Development Laboratory (56) References JP-A-1-90718 (JP, A) JP-A-3-294157 (JP, A) JP-B-46-9429 (JP, B1) ) Kazumitsu Omori, "Management System Using a Personal Computer at an Injection Molding Plant", Synthetic Resins, Vol. 31, No. 2, Japan Synthetic Resin Technology Association, issued February 1, 1985, P. . 12-17 Masaaki Yoshida, “From Group Management of Injection Molding Machines to FA”, Synthetic Resins, Vol. 33, No. 2, Japan Synthetic Resins Association, published February 1, 1987, p. 24-31 (58) Field surveyed (Int.Cl. ⁷ , DB name) B29C 45/76-45/82 B29C 45/17 G07C 3/02 B23Q 41/08

Claims (4)

(57) [Claims] A plurality of injection molding machines are connected to a centralized control device via a communication line, and each of the injection molding machines has a state where the injection molding machine is operating and a state where the operation is stopped. An operating state detecting means for dividing each type according to the type and detecting each type of operating state is provided, and a means for reading the detection state by the operating state detecting means of each injection molding machine, Operating time storage means for automatically integrating and storing the elapsed time for each injection molding machine and for each type of operating state, and for each injection molding machine stored in the operating time storage means for each state And a data output means for displaying and outputting the integrated time of the operating state of each type. 2. A plurality of injection molding machines are connected to a central control device via a communication line, and each of the injection molding machines has a state where the injection molding machine is operating and a state where the operation is stopped. Operating state detecting means for dividing each type according to the type, and detecting each type of operating state; and while each operating state detecting means detects each type of operating state of the injection molding machine, to providing a state-specific operation time storage means for automatically integration stored elapsed time, the central control device, for each type to be stored in the state by operation time storage means for each morphism <br/> molding machine An operating time analysis apparatus for an injection molding machine, comprising: means for reading elapsed time; and data output means for displaying and outputting the accumulated time of the operating state of each type of injection molding machine. 3. The operating state detecting means includes a means for detecting a power-on state of the injection molding machine, and the central control device controls the centralized control device based on a relationship between an integrated time of the power-on state and an integrated time of another operating state. 3. The injection molding according to claim 1, further comprising means for calculating a ratio of the integration time for each operation state, and wherein the data output means displays and outputs the ratio of the integration time for each type of operation state. Machine operating time analyzer. 4. The centralized control device is provided for each injection molding machine.
Integrated value storage means for storing the integrated value of the elapsed time for each type of operation time for one day for one month for each day, and the integrated value for each injection molding machine at the end of the month and each day for each type of operation state A total integrated value storage means for calculating the integrated value of each type of operating state for each month and storing the integrated value for a plurality of months, wherein the data output means is provided for each injection molding stored in the integrated value storage means for each month. 4. The operating time analysis device for an injection molding machine according to claim 1, wherein the integrated value of the operating state of each type is displayed and output for each machine every month.