JPH10138314A - Mold monitoring method and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the time for timing processing and to reduce a signal wire for timing processing by processing the monitor timing of a mold monitoring apparatus within the mold monitoring apparatus. SOLUTION: Image brightness data in such a state that a molded product is entirely bonded to a movable mold is stored in a primary monitoring image data memory 4 as primary monitoring comparison reference data and image brightness data in such a state that the molded product does not remain in the movable mold is stored in a secondary monitoring image data memory 5 as secondary monitoring comparision reference data. Next, when an injection molding machine starts automatic operation, at the same time, the timing signal generation circuit 6 of a mold monitoring apparatus outputs a timing signal for primary monitoring. A microprocessor 7 compares and judges the content of a work image data memory 2 and the content of a data memory 4 on the basis of this timing signal through an image data reading circuit 8 and, in the case of coincidence, primary monitoring is completed to enter secondary monitoring operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold monitoring device for monitoring a mold of an injection molding machine.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional timing processor for exchanging signals between an injection molding machine and a mold monitoring apparatus. Conventionally, multiple signal lines required for timing processing of the mold monitoring device from the injection molding machine are connected to the mold monitoring device,
A timing signal is taken into the die monitoring device by the plurality of signal lines, and the die monitoring device monitors the die according to the timing signal, and a command signal is output to the injection molding machine based on the monitoring result.

This will be described along the steps of an injection molding machine according to a timing chart shown in FIG. First, the resin is injected into the mold with the movable mold and the fixed mold of the injection molding machine closed, and when the injection is completed, the movable mold is moved by the mold opening signal a to perform mold opening b. Here, when the movable mold reaches the release position, the mold opening completion signal c is output to the mold monitoring device, and the mold monitoring device performs primary monitoring d and monitors whether or not all the molded products remain in the fixed mold. For this purpose, a movable video signal is captured from the camera of the mold monitoring device. Next, the video signal is converted into luminance information, and the converted luminance information is compared with reference luminance information. If there is no problem in the comparison result, a molded product adhered to the movable mold is sent from the mold monitoring device. Is output to the injection molding machine. The injection molding machine that has received the ejection command signal operates the ejection pin once or a plurality of times to separate the molded product provided on the movable mold from the movable mold, and pushes the molded product from the movable mold.

When the ejection operation is completed, an ejection completion signal g is output from the injection molding machine to the mold monitoring device,
The die monitoring device that has received the protrusion completion signal performs secondary monitoring h of the movable die, and monitors whether or not a molded product remains in the movable die. For this purpose, as in the case of the primary monitoring, a movable video signal is fetched, converted into luminance information, and compared with a reference value. If there is no problem in the comparison result, the mold monitoring apparatus outputs a mold closing command signal j to the injection molding machine, and the injection molding machine moves the movable mold and starts mold closing k. This is the one-step operation of the injection molding machine and the mold monitoring device that has been conventionally performed.

[0005]

However, in the conventional case, the monitoring device starts monitoring after receiving the monitoring timing signal from the injection molding machine, makes a comparison judgment, and based on the result, causes the injection molding machine to perform the next operation. It is necessary to synchronize the operation of the injection molding machine with the mold monitoring device, and the processing time of capturing the video signal of the mold monitoring device, converting it into luminance information, and comparing and judging is added. There was a problem that was delayed. Particularly in an injection molding machine, from the viewpoint of cost reduction of molded products, it is desired to produce many molded products in a short time. In addition, since there are a plurality of signal lines for signal control between the injection molding machine and the mold monitoring device, there are problems that the man-hour is required at the time of on-site installation and that a special technique is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and at the same time, shortens the time required for the timing processing, reduces the number of signal lines for the timing processing, and replaces the signal lines with the die monitoring. The object of the present invention is to solve the above problem by processing the monitoring timing of the apparatus in the mold monitoring apparatus.

[0007]

According to a first aspect of the present invention, there is provided a mold monitoring method for monitoring an injection-molded product of an injection molding machine using a camera. The method occurs in a mold monitoring device after the mold is closed. The video luminance information captured by the timing signal is sequentially compared with the reference luminance information, and when the comparison result is determined to be normal, the current monitoring is interrupted, the process is advanced to the next monitoring process, and the comparison result is obtained. A mold monitoring method is characterized in that an abnormal signal is issued when it is determined that the mold is abnormal.

According to a second aspect of the present invention, there is provided a mold monitoring apparatus for monitoring an injection-molded product of an injection molding machine using a camera, comprising: a working image brightness memory for storing image brightness information obtained by monitoring a mold with a camera; A primary monitoring reference image brightness memory for storing image brightness information obtained by monitoring a primary monitoring state in which a molded product adheres to a mold with a camera, and a molded product pushed down from the mold 2
A secondary monitoring reference video brightness memory for storing video brightness information obtained by monitoring the next monitoring state by a camera, and a brightness signal stored in the working video brightness memory are stored in the primary monitoring reference video brightness memory. Comparing the secondary monitoring reference signal and the secondary monitoring reference signal stored in the secondary monitoring reference image luminance memory, and outputting a normal signal if the difference between the two is within a predetermined range;
A comparison circuit that outputs an abnormal signal if the difference between the two is outside a predetermined range, and a control device that outputs a control signal for proceeding to the next step only when a normal signal is output from the comparison circuit. This is a mold monitoring device.

[0009]

According to the present invention, by monitoring the mold from the mold closing start operation, the cycle time of the injection molding machine can be improved, and early detection of an abnormality can be performed. Further, the wiring between the injection molding machine and the mold monitoring device is minimized, so that the number of man-hours for installing the mold monitoring device on site can be reduced, and no special technique is required.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mold monitoring apparatus according to the present invention will be described below with reference to the drawings. The block diagram shown in FIG. 1 is an overall view according to the present invention. In a mold monitoring device, image luminance information in a normal state of a movable side mold of an injection molding machine (not shown) to be monitored is manually operated by manually moving the movable side mold. The camera 1 shows a state in which a plurality of molded products are all attached to the camera 1 (primary monitoring) and a state in which all molded products are pushed down from the movable mold and no molded product is attached (secondary monitoring). The analog signal is converted into a digital signal by the A / D converter 2 and stored as video reference information in each memory as comparison reference data. That is, the image luminance information in a state where the molded article is completely attached to the movable side mold is stored in the primary monitoring image data memory 4 as comparison reference data for the primary monitoring, and is stored in the movable side mold. Image luminance information in a state where no molded product remains is stored in the secondary monitoring video data memory 5 as comparison reference data for secondary monitoring.

When the comparison reference data has been captured, a mold closing start signal is sent from the mold monitoring device to an injection molding machine (not shown), and the injection molding machine starts automatic operation. Simultaneously with the start of the automatic operation, the mold monitoring device starts the timing signal generating circuit 6 for primary monitoring, and the timing signal generating circuit 6 outputs a timing signal. The timing signal is output for a period of time from the start of mold opening to completion of mold opening. When the timing signal is outputted, while the timing signal is being output, capturing of video luminance information is performed at predetermined time intervals. A monitoring signal is output. The monitoring signal instructs the camera 1 by the microprocessor 7 to capture a video signal at regular intervals while the timing signal is output.

When the timing signal is output to the microprocessor 7, the video luminance information captured by the camera is converted into luminance information by the A / D converter 2, and then stored in the working video data memory 3, and Reference numeral 7 denotes a working data memory 3 through a video data reading circuit 8.
And the contents of the primary monitoring video data memory 4 are read, and the contents of these data are compared and determined. Thereafter, while the microprocessor 7 is generating the timing signal,
The video luminance information captured by the monitoring signal is compared and determined in the same manner as described above, and this is repeated until a match determination result is obtained.

If the comparison between the contents of the working data memory 3 and the contents of the primary monitoring data memory 4 does not match even after the end of the primary monitoring timing signal, the microprocessor 7 determines that there is an abnormality, and The contents of the memory 3 are compared with the contents of the primary monitoring data memory 4, and the information of the mismatched part is stored in the comparison data memory 9. The mismatch data stored in the comparison data memory 9 is displayed on the LCD / CRT display 12 via the display memory 10 and the LCD / CRT display control circuit 11 that follow the subsequent stage. Further, the microprocessor 7 alerts or optically notifies the operator of the abnormality via the alarm means 14.

If the contents of the working data memory 3 and the contents of the primary monitoring video data memory 4 are compared and determined while the primary monitoring timing signal is being generated, if they match,
At that time, the primary monitoring is terminated, and the secondary monitoring operation is started.
When the primary monitoring of the mold monitoring device is normal, the microprocessor 7 outputs a secondary monitoring command to the timing signal generator. The timing signal generator 6 calculates the time from the current primary monitoring end time to the completion of the protrusion, and outputs the result as a timing signal. When the timing signal is output, a monitoring signal for capturing video luminance information at predetermined time intervals is output while the timing signal is being output. When the timing signal is output to the microprocessor 7, the video luminance information captured by the camera is converted into luminance information by the A / D converter 2.
The contents are stored in the working video data memory 3, and the microprocessor 7 reads the contents of the working data memory 3 and the contents of the secondary monitoring video data memory 5 through the video data reading circuit 8, and compares and determines the contents of these data.

Thereafter, while the timing signal is being generated, the microprocessor 7 compares and determines the image luminance information captured by the monitoring signal in the same manner as described above, and repeats this until a match determination result is obtained. If the comparison between the contents of the working data memory 3 and the contents of the secondary monitoring data memory 5 do not match even after the end of the secondary monitoring timing signal, the microprocessor 7 determines that there is an abnormality, and The contents are compared with the contents of the secondary monitoring video data memory 5, and the information of the mismatched part is stored in the comparison data memory 9. The mismatch data stored in the comparison data memory 9 is displayed on the LCD / CRT display 12 via the display memory 10 and the LCD / CRT display control circuit 11 that follow the subsequent stage.

The microprocessor 7 alerts or optically informs the operator of the abnormality through an alarm means. When the contents of the work data memory 3 and the contents of the secondary monitoring video data memory 5 are compared and determined while the secondary monitoring timing signal is being generated, if they match, the result is 2
The next monitoring is terminated, and a mold closing start signal to output the injection molding machine to the next molding cycle is output to the molding machine.

FIG. 2 shows this state in a timing chart. First, by sending a mold closing start signal m from the mold monitoring device to the injection molding machine, the injection molding machine closes the mold, and the operation of the injection and mold opening signal n is performed. When the mold monitoring device sends out the mold closing signal m, it enters a primary monitoring operation and generates a timing signal o in the monitoring device. When the timing signal o is generated, the monitor signal p is generated at the same time, and the video luminance information is captured. Here, when the comparison result matches at point v, the secondary monitoring operation is started, and a timing signal q for secondary monitoring is generated. The protrusion r is automatically performed by the automatic operation of the injection molding machine if no abnormality occurs in the primary monitoring. At the same time as the timing signal q is generated, the monitor signal s is output, and the video luminance information is captured. If the comparison results match at point w, the mold closing start signal t
Is output, and the injection molding machine starts the mold closing u at the same time as the end of the ejection.

If no comparison result is obtained while the timing signal o or p is being output, it is determined that an abnormality has occurred, and the die monitoring apparatus outputs an alarm signal without proceeding to the next processing. It has become. If the mold monitoring apparatus does not proceed to the next process, the mold closing start signal t is not output, so that the injection molding machine is stopped in a state of waiting for the mold closing start signal. Accordingly, the wiring between the injection molding machine and the mold monitoring device only needs to be a wiring of a mold closing start signal from the mold monitoring device to the injection molding machine.

[Brief description of the drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a timing chart of the embodiment of the present invention.

FIG. 3 is a timing chart showing an operation of a conventional mold monitoring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Camera 2 ... A / D converter 3 ... Video data memory for work 4 ... Video data memory for primary monitoring 5 ... Video data memory for secondary monitoring 6 ... Timing Signal generation circuit 7 Microprocessor 8 Image data readout circuit 9 Comparison data memory 10 Display memory 11 LCD / CRT display control circuit 12 LCD / CRT display 13 ... Injection molding machine control circuit 14 ... Alarm means

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[Procedure amendment]

[Submission date] January 7, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: Die monitoring method and apparatus

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mold monitoring device for monitoring a mold of an injection molding machine.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional timing processor for exchanging signals between an injection molding machine and a mold monitoring apparatus. Conventionally, multiple signal lines required for timing processing of the mold monitoring device from the injection molding machine are connected to the mold monitoring device,
A timing signal is taken into the die monitoring device by the plurality of signal lines, and the die monitoring device monitors the die according to the timing signal, and a command signal is output to the injection molding machine based on the monitoring result.

This will be described along the steps of an injection molding machine according to a timing chart shown in FIG. First, the resin is injected into the mold with the movable mold and the fixed mold of the injection molding machine closed, and when the injection is completed, the movable mold is moved by the mold opening signal a to perform mold opening b. Here, when the movable mold reaches the release position, the mold opening completion signal c is output to the mold monitoring device, and the mold monitoring device performs primary monitoring d and monitors whether or not all the molded products remain in the fixed mold. For this purpose, a movable video signal is captured from the camera of the mold monitoring device. Next, the video signal is converted into luminance information, and the converted luminance information is compared with reference luminance information. If there is no problem in the comparison result, a mold monitoring device is used to drop the molded product from the movable mold. The ejection command signal e is output to the injection molding machine. The injection molding machine that has received the ejection command signal performs an ejection for peeling off a molded product provided on the movable mold from the movable mold.
Operate twice or several times to push down the molded product from the movable mold.

When the ejection operation is completed, an ejection completion signal g is output from the injection molding machine to the mold monitoring device.
The die monitoring device that has received the protrusion completion signal performs secondary monitoring h of the movable die, and monitors whether or not a molded product remains in the movable die. For this purpose, as in the case of the primary monitoring, a movable video signal is fetched, converted into luminance information, and compared with a reference value. If there is no problem in the comparison result, the mold monitoring apparatus outputs a mold closing command signal j to the injection molding machine, and the injection molding machine moves the movable mold and starts mold closing k. This is the one-step operation of the injection molding machine and the mold monitoring device that has been conventionally performed.

[0005]

However, in the conventional case, the monitoring device starts monitoring after receiving the monitoring timing signal from the injection molding machine, makes a comparison judgment, and, based on the result, causes the injection molding machine to perform the next operation. In order to proceed, the injection molding machine needs to synchronize its operation with the mold monitoring device, and the processing time of capturing the video signal of the mold monitoring device, converting it to luminance information, and comparing and judging is added. There was a problem that was delayed. Also, when monitoring the movable mold on the molding machine using the camera, the stop position of the movable mold moves beyond the specified position, that is, the camera is out of focus due to overrun, and the mold monitoring device malfunctions. And may hinder continuous molding. Furthermore, especially in an injection molding machine, from the viewpoint of cost reduction of molded products, it is desired to produce many molded products in a short time. In addition, since there are a plurality of signal lines for signal control between the injection molding machine and the mold monitoring device, there are problems that it takes a lot of man-hours at the time of on-site installation and requires specialized skills.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and at the same time, shortens the time required for the timing processing, reduces the number of signal lines for the timing processing, and replaces the signal lines with the die monitoring. The object of the present invention is to solve the above problem by processing the monitoring timing of the apparatus in the mold monitoring apparatus.

[0007]

According to a first aspect of the present invention, there is provided a mold monitoring method for monitoring an injection-molded product of an injection molding machine using a camera, wherein a monitoring timing generated in the mold monitoring apparatus during a molding cycle. The video luminance information captured by the signal is sequentially compared with the reference luminance information, and when the comparison result is determined to be normal, the current monitoring is interrupted, the process is advanced to the next monitoring step, and the comparison result is determined. A die monitoring method characterized in that an abnormal signal is issued when it is determined that the die is abnormal.

According to a second aspect of the present invention, there is provided a mold monitoring apparatus for monitoring an injection-molded product of an injection molding machine using a camera, comprising: a working image brightness memory for storing image brightness information obtained by monitoring a mold with a camera; A primary monitoring reference image brightness memory for storing image brightness information obtained by monitoring a primary monitoring state in which a molded product adheres to a mold with a camera, and a molded product pushed down from the mold 2
A secondary monitoring reference video brightness memory for storing video brightness information obtained by monitoring the next monitoring state by a camera, and a brightness signal stored in the working video brightness memory are stored in the primary monitoring reference video brightness memory. Comparing the secondary monitoring reference signal and the secondary monitoring reference signal stored in the secondary monitoring reference image luminance memory, and outputting a normal signal if the difference between the two is within a predetermined range;
A comparison circuit that outputs an abnormal signal if the difference between the two is outside a predetermined range, and a control device that outputs a control signal for proceeding to the next step only when a normal signal is output from the comparison circuit. This is a mold monitoring device.

[0009]

According to the present invention, since the mold is constantly monitored, the cycle time of the injection molding machine can be improved, and early detection of an abnormal condition becomes possible. In addition, the video brightness information and the reference brightness information captured by the timing signal generated in the mold monitoring device are sequentially compared, and when the comparison result is determined to be normal, the current monitoring is terminated and the next monitoring is performed. By proceeding to the process, the mold opening stop position of the molding machine overruns from the set position,
Even if the camera is out of focus, the mold monitoring device does not malfunction. Furthermore, the wiring between the injection molding machine and the mold monitoring device is minimized, so that the number of man-hours for installing the mold monitoring device on site can be reduced, and no special technique is required.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mold monitoring apparatus according to the present invention will be described below with reference to the drawings. The block diagram shown in FIG. 1 is an overall view related to the present invention. The camera 1 shows a state in which a plurality of molded articles are all attached to the camera 1 (primary monitoring) and a state in which all molded articles are pushed down from the movable mold and no molded article is attached (secondary monitoring). The analog signal is converted into a digital signal by the A / D converter 2 and stored as video reference information in each memory as comparison reference data. That is, the image luminance information in a state where the molded article is completely attached to the movable mold is stored in the primary monitoring video data memory 4 as comparison reference data for primary monitoring, and is stored in the movable mold. Image luminance information in a state where no molded article remains is stored in the secondary monitoring video data memory 5 as comparison reference data for secondary monitoring.

When the comparison reference data has been captured, a mold closing start signal is sent from the mold monitoring device to an injection molding machine (not shown), and the injection molding machine starts automatic operation. Simultaneously with the start of the automatic operation, the mold monitoring device starts the timing signal generating circuit 6 for primary monitoring, and the timing signal generating circuit 6 outputs a timing signal. The timing signal is output from the start of mold closing to the completion of mold opening, and when the timing signal is output, capture of video luminance information is performed at predetermined time intervals while the timing signal is output. A monitoring signal is output. The monitoring signal instructs the camera 1 by the microprocessor 7 to capture a video signal at regular intervals while the timing signal is output.

When the timing signal is output to the microprocessor 7, the video luminance information captured by the camera is converted into luminance information by the A / D converter 2, and then stored in the working video data memory 3, and Reference numeral 7 denotes a working data memory 3 through a video data reading circuit 8.
And the contents of the primary monitoring video data memory 4 are read, and the contents of these data are compared and determined. Thereafter, while the microprocessor 7 is generating the timing signal,
The video luminance information captured by the monitoring signal is compared and determined in the same manner as described above, and this is repeated until a match determination result is obtained.

If the comparison between the contents of the working data memory 3 and the contents of the primary monitoring data memory 4 does not match even after the end of the primary monitoring timing signal, the microprocessor 7 determines that there is an abnormality, and The contents of the memory 3 are compared with the contents of the primary monitoring data memory 4, and the information of the mismatched part is stored in the comparison data memory 9. The mismatch data stored in the comparison data memory 9 is displayed on the LCD / CRT display 12 via the display memory 10 and the LCD / CRT display control circuit 11 that follow the subsequent stage. Further, the microprocessor 7 alerts or optically notifies the operator of the abnormality via the alarm means 14.

If the contents of the working data memory 3 and the contents of the primary monitoring video data memory 4 are compared and determined while the primary monitoring timing signal is being generated, if they match,
At that time, the primary monitoring is terminated, and the secondary monitoring operation is started.
When the primary monitoring of the mold monitoring device is normal, the microprocessor 7 outputs a secondary monitoring command to the timing signal generator. The timing signal generator 6 calculates the time from the current primary monitoring end time to the completion of the protrusion, and outputs the result as a timing signal. When the timing signal is output, a monitoring signal for capturing video luminance information at predetermined time intervals is output while the timing signal is being output. When the timing signal is output to the microprocessor 7, the video luminance information captured by the camera is converted into luminance information by the A / D converter 2.
The contents are stored in the working video data memory 3, and the microprocessor 7 reads the contents of the working data memory 3 and the contents of the secondary monitoring video data memory 5 through the video data reading circuit 8, and compares and determines the contents of these data.

Thereafter, while the timing signal is being generated, the microprocessor 7 compares and determines the image luminance information captured by the monitoring signal in the same manner as described above, and repeats this until a match determination result is obtained. If the comparison between the contents of the working data memory 3 and the contents of the secondary monitoring data memory 5 do not match even after the end of the secondary monitoring timing signal, the microprocessor 7 determines that there is an abnormality, and The contents are compared with the contents of the secondary monitoring video data memory 5, and the information of the mismatched part is stored in the comparison data memory 9. The mismatch data stored in the comparison data memory 9 is displayed on the LCD / CRT display 12 via the display memory 10 and the LCD / CRT display control circuit 11 that follow the subsequent stage.

The microprocessor 7 alerts or optically informs the operator of the abnormality through an alarm means. When the contents of the work data memory 3 and the contents of the secondary monitoring video data memory 5 are compared and determined while the secondary monitoring timing signal is being generated, if they match, the result is 2
The next monitoring is terminated, and a mold closing start signal to output the injection molding machine to the next molding cycle is output to the molding machine.

FIG. 2 shows this state in a timing chart. First, by sending a mold closing start signal m from the mold monitoring device to the injection molding machine, the injection molding machine closes the mold, and the operation of the injection and mold opening signal n is performed. When the mold monitoring device sends out the mold closing signal m, it enters a primary monitoring operation and generates a timing signal o in the monitoring device. When the timing signal o is generated, the monitor signal p is generated at the same time, and the video luminance information is captured. Here, when the comparison result matches at point v, the secondary monitoring operation is started, and a timing signal q for secondary monitoring is generated. The protrusion r is automatically performed by the automatic operation of the injection molding machine if no abnormality occurs in the primary monitoring. At the same time as the timing signal q is generated, the monitor signal s is output, and the video luminance information is captured. If the comparison results match at point w, the mold closing start signal t
Is output, and the injection molding machine starts the mold closing u at the same time as the end of the ejection.

If a comparison result is not obtained while the timing signal o or p is being output, it is determined that an abnormality has occurred, and the mold monitoring apparatus outputs an alarm signal without proceeding to the next processing. The operation of the molding machine can be stopped. If the mold monitoring device does not proceed to the next process, the mold closing start signal t is not output, so that the injection molding machine is stopped in a state of waiting for the mold closing start signal.
Accordingly, the wiring between the injection molding machine and the mold monitoring device only needs to be wired for the mold closing start signal from the mold monitoring device to the injection molding machine.

[Brief description of the drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a timing chart of the embodiment of the present invention.

FIG. 3 is a timing chart showing an operation of a conventional mold monitoring device.

[Description of Signs] 1 ... Camera 2 ... A / D Converter 3 ... Working Video Data Memory 4 ... Primary Monitoring Video Data Memory 5 ... Secondary Monitoring Video Data Memory 6 timing signal generation circuit 7 microprocessor 8 video data readout circuit 9 comparison data memory 10 display memory 11 LCD / CRT display control circuit 12 LCD / CRT display 13 ・ ・ ・ Injection molding machine control circuit 14 ・ ・ ・ Alarm means

Claims (3)

[Claims] 1. A mold monitoring method for monitoring an injection-molded product of an injection molding machine using a camera, comprising: image luminance information captured by a timing signal generated in a mold monitoring device after the mold is closed; The reference brightness information is sequentially compared, and when the comparison result is determined to be normal,
Suspend the current monitoring and proceed to the next monitoring process,
A mold monitoring method, wherein an abnormal signal is issued when the comparison result is judged to be abnormal. 2. A mold monitoring apparatus for monitoring an injection-molded product of an injection molding machine using a camera, a working image brightness memory for storing image brightness information obtained by monitoring a mold with a camera, and a molded product in the mold. A primary monitoring reference video brightness memory that stores video brightness information obtained by monitoring the primary monitoring status with the camera attached thereto, and video brightness information obtained by monitoring the secondary monitoring status in which a molded article is pushed down from a mold by a camera. A secondary monitoring reference video brightness memory, and a brightness signal stored in the working video brightness memory are stored in the primary monitoring reference signal and the secondary monitoring reference video brightness memory stored in the primary monitoring reference video brightness memory. Done 2
A comparison circuit that outputs a normal signal when the difference between the two is within a predetermined range, and outputs an abnormal signal when the difference between the two is outside the predetermined range; A control device for outputting a control signal for proceeding to the next step only when the signal is output. 3. The die monitoring device according to claim 2, wherein the die monitoring device further includes an alarm device that outputs an alarm in response to the output of the abnormal signal of the comparison circuit.