JP3616997B2 - Memory / output method of past operating state of injection molding machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an injection molding machine, and more particularly to an improvement for facilitating maintenance work in the event of an abnormality.
[0002]
[Prior art]
The injection molding machine is provided with various sensors at various locations for monitoring during operation, and the control device receives detection data from these sensors and monitors whether or not an abnormality has occurred. Examples of sensors include dozens or more of screw position sensors, mold opening / closing position sensors, resin pressure sensors, and the like. Then, monitoring conditions are set in advance for each of these sensors, and if the control device deviates from the conditions in which the detection data is set, there is a possibility of occurrence of an abnormality that may cause a quality defect or an abnormality. A warning is displayed. Note that the occurrence of abnormality includes not only the monitoring of the detection data as described above but also an event such as opening of a device attached to the injection molding machine, for example, a safety door during operation. The injection molding machine is provided with various operation switches, for example, a switch for switching the operation mode to either manual or automatic, and operations on such operation switches are also monitored.
[0003]
In any case, various displays indicating the current operation state of the injection molding machine are displayed on the display provided in the control device of the injection molding machine. For example, there are various actual values (screw position, mold opening / closing position, etc., which are detection data detected by the sensor), abnormal state (mold protection abnormality occurrence, etc.), operation switch on / off state, and the like. These are all the conditions at the time when the operator is looking at the display screen.
[0004]
In addition, as a form to display the past operation state, display of abnormality history (abnormality occurrence time and abnormality content for past tens of times) and setting history (change of molding conditions for past tens of times) by operator display mode setting operation Time and contents of change) can be displayed.
[0005]
[Problems to be solved by the invention]
However, the various types of display described above are disjoint because they are performed by a display mode setting operation, and have the following problems. For example, when an abnormality occurs during operation, when trying to investigate the cause, the operator usually has what the various actual values near that time, and what other abnormality has occurred. We investigated the points such as what kind of molding conditions had been changed, but various necessary actual values were not memorized or each was displayed on a separate screen. Takes a long time.
[0006]
Therefore, an object of the present invention is to make it possible to easily perform maintenance work in the event of an abnormality or the like by making it possible to easily display and display events that have occurred in the past in an injection molding machine. It is in.
[0007]
[Means for Solving the Problems]
The method for storing and outputting the past operation state of the injection molding machine according to the present invention regards a change in state occurring during operation or standby of the injection molding machine as an event occurrence, and at least the event type, occurrence time, and event In order to know under what conditions an event has occurred according to the type of data, all the reference data determined in advance is stored as one event log in a storage device provided in the control device of the injection molding machine. The stored event log data can be arbitrarily output.
[0008]
In the present storage / output method, the output is displayed on a display provided in the control device, the event log data from the storage device is stored in a storage medium such as a flexible disk, or the upper control is performed by a line or the like. Output to the device or output to an external printer.
[0009]
In the present storage / output method, as the output, the stored event log data can be collectively output in various forms such as by time or for each type related to each other by searching. And
[0010]
The storage / output method is further characterized in that the stored event log data is input to a host control device, and the event log data is output by retrieval by the host control device.
[0011]
In the present storage / output method, the event occurrence may be caused by at least one of operations for each part of the injection molding machine, change of a set value, and a plurality of detection data from a plurality of sensors installed in each part of the injection molding machine. This includes a case where a condition set in advance according to detection data is not satisfied.
[0012]
The storage / output method is further characterized in that event log data in the storage device can be referred to from an external terminal device via the Internet.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a diagram showing a configuration of a control device to which the present invention is applied and its peripheral devices in an injection molding machine. In FIG. 1, the injection molding machine 1 is provided with a control panel 10. The control panel 10 includes an input unit (not shown) such as a keyboard, a printer, and the like in addition to the control device 11 and the display 12. Although the control device 11 has a built-in memory, in this embodiment, a large amount of external storage device 13 is provided to store a large amount of data. Of course, the external storage device 13 is erased in order from the oldest data when the capacity becomes full.
[0014]
The control device 11 is configured to perform various controls on the injection molding machine in the same manner as the control devices for the injection molding machine so far, and is configured to enable the following points that are features of the present embodiment. Yes.
[0015]
{Circle around (1)} Conventionally, data indicating operation states scattered in various forms are received and handled in a unified manner.
[0016]
{Circle around (2)} The change in the operating state is called event occurrence, and the event type, occurrence time, and reference data are recorded. As described above, an event occurs when the detection data from a sensor falls outside the set conditions, or when the device attached to the injection molding machine, for example, an operation for opening a safety door, is provided in the injection molding machine. It includes all the events that are supposed to occur in connection with the injection molding machine, such as the operation of various operation switches, and the change of set values. On the other hand, the reference data is the minimum data necessary for knowing under what conditions an event occurs, and is determined in advance for each event.
[0017]
(3) The event type, occurrence time, and reference data are collectively referred to as an event log, and are stored in the external storage device 13 every time an event occurs.
[0018]
(4) The event log data stored in the external storage device 13 is displayed on the display 12, and when the control device 11 is further connected to the host control device, the event log data is output to the host control device. Output to other printers. The host control device is a control device that collectively manages a plurality of injection molding machine control devices connected by a line such as a LAN.
[0019]
(5) By performing a search through the input unit attached to the control device 11, one or more past arbitrary event logs can be collectively referred to on the display 12. At this time, in addition to the condition that the time zone is limited, various rearrangements for easy viewing, for example, the condition of limiting to the type of occurrence of abnormality or the type of operation can be given.
[0020]
(6) By providing a writing mechanism for a recording medium such as a flexible disk or MD, the event log can be taken out as an electronic file.
[0021]
(7) An event log can be connected to the external storage device 13 from a remote location remote from the installation location of the injection molding machine by connecting to the server from the external terminal device using the Internet by enabling connection to a so-called server. Data can be referred to, and an arbitrary event log can be referred to by an external terminal device.
[0022]
FIG. 2 shows an example in which event logs are grouped. Here, an example is shown in which all events are roughly divided into groups of occurrence of abnormality, interlock, operation, and setting value change. For example, when an event is abnormal, the reference data includes the process name at that time, the actual value obtained from the sensor (which sensor's actual value is to be used according to the event), sensor input The value is stored. In the case of changing the set value, as the reference data, the set molding condition name at that time, the value before the change, and the value after the change are stored.
[0023]
FIG. 3 shows an example of specific contents of the event log. In particular, this example shows a case where the content of the search is limited to a group of occurrences of abnormality and operations in a certain time zone. For example, a mold protection abnormality occurred at 8:02:21 on February 28, 2000. The reference data at that time is that the process name is closed, the actual value is the mold open / close position 1.23 mm, sensor input It indicates that the value was “0011 0110 0000 1110”.
[0024]
As described above, the control device 11 stores all generated event logs in the external storage device 13 during operation of the injection molding machine or during standby. When an unusual situation occurs, the operator refers to the event log on the display 12 to investigate the cause. At this time, by narrowing down the group so that the contents of the search are only the occurrence of an abnormality and only the operation, the displayed event log data is limited to some extent, and the reference data is displayed together. Surveys can be performed easily.
[0025]
If it is difficult for the operator to investigate the cause, take the necessary event log data as an electronic file outside the injection molding machine, store it in a recording medium such as a flexible disk, and send it to the manufacturer. The manufacturer can also investigate. Alternatively, the event log data can be transmitted to the server by connecting a telephone line to the control device 11 and can be connected from the external terminal device to the server via the Internet. An investigation can also be performed with reference to the event log data in the apparatus 13. The same applies when the control device 11 and the host control device are connected by a network such as a LAN instead of the Internet.
[0026]
【The invention's effect】
As explained above, according to the present invention, it is possible to easily display the events that have occurred in the past in the injection molding machine on the display, so that it is possible to pursue the cause in the event of an abnormality or the like in various places. As a result, maintenance work can be performed more easily.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a control device and its peripheral devices to which the present invention is applied in an injection molding machine.
FIG. 2 is a diagram showing an example in which event logs used for display display in the present invention are grouped.
FIG. 3 is a diagram showing an example of specific contents of an event log shown in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Injection molding machine 10 Control panel 11 Control apparatus 12 Display 13 External storage device

Claims (6)

Considers the change in the conditions that occur during or during standby operation of the injection molding machine and an event occurs, knowing at least events and the type of, and occurrence time, whether occurred under what conditions events according to the type of event Therefore, it is possible to store all of the predetermined reference data as a single event log in a storage device provided in the control device of the injection molding machine and arbitrarily output the stored event log data. A method for storing and outputting past operating states of an injection molding machine. 2. The storage / output method according to claim 1, wherein the output is displayed on a display provided in the control device, event log data from the storage device is stored in a storage medium such as a flexible disk, a line or the like. A method for storing and outputting past operation states of an injection molding machine, characterized in that the data is output to a host controller or output to an external printer. 3. The storage / output method according to claim 2, wherein as the output, the stored event log data can be collectively output in various forms such as by time or by a type related to each other by searching. A method for storing and outputting past operating states of an injection molding machine characterized by the above. 3. The injection / molding method according to claim 2, wherein the stored event log data is input to a host controller, and the event log data is output by retrieval by the host controller. A method of storing and outputting the past operating status of the machine. The storage / output method according to claim 1, wherein the event occurrence includes at least a plurality of detection data from an operation to each part of the injection molding machine, a change of a set value, and a plurality of sensors installed in each part of the injection molding machine. A method for storing and outputting a past operation state of an injection molding machine, characterized in that one includes a case where a predetermined condition is not satisfied in accordance with detection data. 6. A storage / output method according to claim 5, wherein event log data in the storage device can be referred to from an external terminal device via the Internet. ·output method.

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