JPH0360654B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for an injection molding machine that can digitally display errors occurring during the injection molding process.

In the relay sequence control device used in injection molding machines, by checking the wiring in order when an error occurs, it is possible to find the error location without much time.

However, in a sequence control device that uses electronic circuits, small electronic components are closely integrated, and even if there is only one printed circuit board, if an error occurs in the printed circuit board, it is necessary to know which printed circuit board has the error. It required a certain level of knowledge about electronic circuits, and compared to relay sequence control devices, it took more time to process when an error occurred.

Therefore, in a sequence control device using an electronic circuit, an error display method using a number called an error code is adopted in order to facilitate finding and repairing an error location. However, there is no direct connection between the error code and the error location, and there is a drawback that a comparison table must be used.

This invention was conceived in view of the above points, and its purpose is to create a digital display that displays the elapsed time of the molding cycle by associating error display codes with wiring numbers. , the wire number of the error location can be used together with the major classification number display at the time of error occurrence, and from these displays, it is possible to immediately know the occurrence of the error, the cause and location, and furthermore, the treatment for the injection molding machine. The purpose of this invention is to provide a control device.

The present invention is characterized by a sequence processing device that controls the operation of each part of an injection molding machine according to a predetermined program and monitors the operating status, and the elapsed time from the start of the predetermined program or the occurrence of an error. A display device with the required number of digits that digitally displays the time major classification number and wire number, and a display device that is interposed between the display device and the above sequence processing device, and discriminates input information and displays an error in the time display of the above display device. and a display discrimination device that displays a major classification number in the digit at the end of the digital display and a wire number in the other digits, and a display discrimination device that discriminates error information output from the sequence processing device when an error occurs, An error discriminating device that broadly categorizes the importance of the error and reads the sequence wire number at the time of error occurrence, and is installed between the error discriminating device and the display discriminating device and the abnormality sequence processing device, The output major classification number and wire number are input to the display discrimination device, while the error processing device inputs the major classification number to the abnormality sequence processing device, and the major classification number output from the error processing device is used to determine the predetermined number. and the abnormality sequence processing device described above, which performs sequence control by determining the processing corresponding to the major classification.

Hereinafter, this invention will be explained in more detail with reference to illustrated embodiments.

1 is a digital display device, which has a 4-digit digital display, the highest digit () is used as a major classification number that categorizes the importance of the error into 5 levels when an error occurs, and the other 3 digits () , (), () indicate the elapsed time of the molding process, and when an error occurs, they are used to indicate the wire number of the error location.

Of the digital display device 1, the highest digit () is connected to the sequence control, and the other digits (), (), () are connected to the sequence control circuit, so that the molding process progresses according to the program. When the timer is running, the elapsed time is digitally displayed in seconds as shown in FIG.

However, if an error occurs during molding, as shown in FIG. 3, the major classification number is displayed in the most significant digit (), and the time display changes to a number line display indicating the error location.

Note that the lowest digit () may be used to display the major classification number.

FIG. 4 is a block diagram showing the display progress. When injection molding starts according to the injection molding program created in advance, the timer also operates at the same time, and the progress is input to the sequence processing device 2 along with the input information. . When the injection molding is progressing according to the program, the information is input to the display discriminator 3 interposed between the display device 1 and the sequence processing device 2, and is further input to the display device 1 so that a predetermined information is displayed. The elapsed time is digitally displayed in the digits.

If an abnormality occurs during injection molding, the input information does not match the program, and the sequence processing device 2 immediately outputs it as error information to the error determination device 4.

The error discriminating device 4 roughly classifies the information into the importance of the error, checks how far the sequence has progressed and stopped, and reads the wire number.

The determined major classification number and wire number are then output to the error processing device 5 provided between the error discriminating device 4 and the display discriminating device 3 and the abnormality sequence processing device 6.

The error processing device 5 inputs the major classification number and wire number to the display discrimination device 3, and inputs the major classification number to the abnormality sequence processing device 6.

Based on the information from the error processing device 5, the display discrimination device 3 changes the display of elapsed time on the display device 1 to an error display, and also changes the major classification number to the most significant digit () of the digital display and other digits. Display the wire number indicating the error location in (~).

Further, the abnormality sequence processing device 6 performs sequence control by determining a process corresponding to a predetermined major classification based on the input major classification number. This processing does not stop immediately, but works so that the most preferable processing is performed depending on the error state, and the processing state is indicated as a major classification number by a predetermined display.

Therefore, by displaying the main classification number along with the number line, it is possible to know what kind of processing was performed after the error occurred.

As described above, the present invention includes a sequence processing device 2 that controls the operation of each part of an injection molding machine according to a predetermined program and monitors the operating status, and a sequence processing device 2 that controls the operation of each part of an injection molding machine according to a predetermined program and monitors the operation status and the elapsed time from the start of the predetermined program or the occurrence of an error. A display device 1 having the required number of digits for digitally displaying the time major classification number and wire number, and a display device 1 interposed between the display device 1 and the sequence processing device 2, which discriminates input information and displays the time of the display device 1. A display discrimination device 3 changes the display to an error display, and also displays a major classification number in the digit at the end of the digital display and a wire number in the other digits, and a display discrimination device 3 that changes the display to an error display, and displays the information output from the sequence processing device 2 when an error occurs. An error discrimination device 4 that discriminates error information, roughly categorizes the importance of the error, and reads the sequence wire number at the time of error occurrence, and the error discrimination device 4
and the display discriminating device 3 and the abnormality sequence processing device 6, and inputs the major classification number and wire number output from the error discriminating device 4 to the display discriminating device 3, while inputting the major classification number to the abnormality sequence processing device 6. Based on the error processing device 5 input to the sequence processing device 6 and the major classification number output from the error processing device 5,
Since the control device for the injection molding machine is composed of the abnormality sequence processing device 6 that performs sequence control by determining the process corresponding to a predetermined major classification, the end displayed as the major classification number when an error occurs The digital display of the digits allows you to immediately know the severity of the error and the location of the error.
It is also possible to know how error handling was performed based on the major classification number.

In particular, in injection molding using an injection molding machine, monitoring the elapsed time from the start of a predetermined program is essential for understanding molding quality and production status, and in this invention, the display device is also used to display errors. This makes it easy for workers who are always paying attention to time monitoring to discover and recognize the time.
Moreover, since only one display device is required, there is no risk of misidentification, and the device does not become complicated or large.

[Brief explanation of drawings]

The drawings show an embodiment of the control device for an injection molding machine according to the present invention, in which FIG. 1 is an abbreviated front view of a digital display device, FIG. 2 is a diagram showing a digital display in normal operation, and FIG. 4 is a diagram showing a digital display when an error occurs, and FIG. 4 is a block diagram explaining the display process. 1...Digital display device, 2...Sequence processing device, 3...Display discrimination device, 4...Error discrimination device, 5...Error processing device, 6...Sequence processing device for abnormality.

Claims (1)

[Claims] 1. A sequence processing device that controls the operation of each part of the injection molding machine according to a predetermined program and monitors the operating status, and a major classification number and wire number at the time of elapsed time from the start of a predetermined program or when an error occurs. a display device with a required number of digits for digitally displaying the information, and a display device interposed between the display device and the sequence processing device, which determines the input information and changes the time display of the display device to an error display;
A display discrimination device that displays the major classification number in the digit at the end of the digital display and the wire number in the other digits, and a display discrimination device that discriminates the error information output from the sequence processing device when an error occurs, and determines the importance of the error. an error discrimination device that broadly categorizes the data and reads the sequence wire number at the time of error occurrence; and an error discrimination device that is installed between the error discrimination device and the above-mentioned display discrimination device and abnormality sequence processing device, and reads the large classification output from the error discrimination device An error processing device inputs the number and wire number to the display discrimination device, and inputs the major classification number to the abnormality sequence processing device, and the major classification number output from the error processing device determines the predetermined major classification. A control device for an injection molding machine, comprising the above abnormality sequence processing device that determines a corresponding process and performs sequence control.