KR20170121075A - Mold monitoring apparatus - Google Patents

Abstract

The object of the present invention is to provide a mold monitoring apparatus capable of detecting with high precision operative anomaly and the presence of a molding defect in a resin molding device. The mold monitoring device comprises: a monitoring camera which photographes in color image the molding side of a mold in a resin molding device; and a monitoring device main body which monitors a state of the molding side of the mold, based on image data acquired by the monitoring camera, wherein a reference image data regarding a reference state of the molding side of the mold is previously recorded in the monitoring device main body. Specifically, the monitoring device main body has functions to compare against the reference image data, an image data for determination acquired on the molding side of the mold in an open state in a molding cycle of the resin molding device, and to determine whether a colored state of the image data for determination having particular color information is within a predetermined acceptable range with respect to the reference image data.

Description

MOLD MONITORING APPARATUS

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold monitoring apparatus for monitoring a mold surface of a mold attached to a resin molding machine, for example.

Generally, in a resin molding machine for producing a resin product, for example, an injection molding machine, a molding cycle consisting of a mold clamping operation, an injection operation, cooling and solidifying of a resin material, a mold opening operation, Is done.

However, in the injection molding machine, when the mold opening operation is performed, the molded article is not held in the molding area of the mold surface of the movable mold, for example, is kept fixed, or is removed from the molding area of the mold surface of the movable mold, There is a case where an operation abnormality which attaches or is attached may occur. Alternatively, when the molded product is projected, an operation abnormality may occur in which the molded product is not released from the mold surface of the movable mold but remains to be held on the mold surface of the movable mold.

When such an operation abnormality occurs, specifically, when the mold clamping operation of the injection molding machine is performed with the molded product remaining on the mold surface of the fixed mold or the movable mold, the mold surface of the stationary mold or the mold surface of the movable mold is damaged by the residual molded product There is a concern. When such a situation occurs, the production line can not be stopped for a long period of time. Therefore, when an operation abnormality occurs, it is necessary to stop the operation of the injection molding machine.

In view of such circumstances, in the process of producing a resin product by an injection molding machine, for example, a surveillance camera is fixed at a position where the mold surface of the movable mold at the mold release completion position can be imaged, And the state of the mold surface of the movable mold is monitored based on the acquired image data.

As such a mold monitoring apparatus, primary monitoring image data obtained by capturing an image of a mold surface of a movable mold after completion of a mold opening operation of the injection molding machine by a surveillance camera during automatic operation of the injection molding machine is compared with primary reference image data It is known to carry out a secondary surveillance operation for comparing secondary surveillance image data obtained by imaging a movable mold surface after the primary surveillance operation and the completion of the molded product projecting operation of the injection molding machine with a surveillance camera See Document 1). The primary reference image data is obtained in advance by capturing a movable mold surface in a state in which a molded product is held in a molding area by a surveillance camera. The secondary reference image data is obtained by moving the movable reference mold Is captured by a surveillance camera.

In this mold monitoring apparatus, luminance data for each of a plurality of pixels constituting an image acquired by the surveillance camera is stored in each of the primary reference image data, the secondary reference image data, the primary surveillance image data and the secondary surveillance image data .

In the primary monitoring operation, luminance data for a plurality of pixels related to a forming area of at least a movable mold surface in primary surveillance image data is calculated for each of a plurality of pixels in the primary reference image data corresponding thereto And the brightness data are compared with each other, and it is determined whether the image is in the normal state or the abnormal state based on the difference between the two. In the steady state, the operation of the injection molding machine is continued to perform the molded product protruding operation, and in the abnormal state, the operation of the injection molding machine is stopped.

On the other hand, in the secondary monitoring operation, each of brightness data for a plurality of pixels related to a forming area of at least a movable mold surface of the secondary supervised image data is divided into a plurality of pieces of brightness data for a plurality of pixels in the corresponding secondary reference image data And the luminance data are compared with each other, and it is determined based on the difference therebetween whether it is a normal state or an abnormal state. In the steady state, the operation of the injection molding machine is continued and the mold clamping operation is performed. When the mold clamping operation is abnormal, the operation of the injection molding machine is stopped.

Japanese Patent Application Laid-Open No. 2002-67115

However, in the above-described mold monitoring apparatus, it is difficult to distinguish between the resin molded article and the mold because the operation abnormality and the molding abnormality are detected based on the luminance data of the image data by the surveillance camera, It can not be monitored with high accuracy. Therefore, the operation of the injection molding machine is continued or stopped due to an erroneous determination, which may cause a failure of the injection molding machine and a decrease in manufacturing efficiency. In addition, the effort of the inspection work for finding defective products in the later process is increased.

It is an object of the present invention to provide a mold monitoring apparatus capable of detecting operation abnormality and presence or absence of molding abnormality in a resin molding machine with high accuracy.

A mold monitoring apparatus according to the present invention includes a surveillance camera for capturing a mold surface of a mold in a resin molding machine as a color image and a monitoring device body for monitoring the condition of the mold surface on the basis of image data acquired by the surveillance camera And,

Reference image data relating to a reference state of the mold surface of the mold is recorded in advance in the monitoring apparatus main body,

The monitoring apparatus main body is configured to compare determination image data obtained for the mold surface of the mold that is open in the molding cycle of the resin molding machine with reference image data, And a function of determining whether or not the state of the colored image having the color information of the reference image data is within the allowable range set as a reference with reference to the reference image data.

In the mold monitoring apparatus according to the present invention, the monitoring apparatus main body has a function of executing a primary monitoring operation for monitoring the state of the mold surface after completion of the mold opening operation in the molding cycle of the resin injection molding machine,

Image data relating to a colored color having specific color information indicating the molded article in a color image obtained by picking up a mold surface of the mold while the molded article is held in a molding area is recorded as primary reference image data,

In the primary surveillance operation, image data related to the colored color having specific color information indicating the molded article in the color image obtained by picking up the mold surface of the movable mold after completion of the mold opening operation of the resin molding machine Wherein the first determination image data and the primary reference image data are acquired as image data for primary determination, and the shape of the color of the color associated with the primary determination image data is compared with the shape of the color of the primary color associated with the primary reference image data, Is determined to be identical.

Further, in the mold monitoring apparatus of the present invention, the monitoring apparatus main body has a function of executing a secondary monitoring operation for monitoring the mold surface of the mold after completion of the molding operation of the molded product in the molding cycle of the resin molding machine,

The image data relating to the colored color having the specific color information in the color image obtained by picking up the mold surface of the mold in which the molded product is released from the molding area is recorded as the secondary reference image data,

In the secondary monitoring operation, the image data related to the color of the color having the specific color information in the color image obtained by picking up the mold surface of the mold after completion of the molded product projecting operation of the resin molding machine is stored as the secondary reference image data And it is preferable that the identification of the determination image data and the identity of the secondary reference image data is determined by the presence or absence of the color of the secondary determination image data.

In the mold monitoring apparatus of the present invention, it is preferable that the colored color is a color of the molded product, which is determined by a pixel having color information included in an allowable color range set based on the color information of the reference color .

In the mold monitoring apparatus of the present invention, the permissible color range is a virtual color range connecting the coordinates (R, G, B) of the reference color defined in the RGB color space and the black coordinates (0, 0, 0) It is preferable that the angle of the straight line X and an arbitrary imaginary straight line Y passing through the black coordinate (0, 0, 0) is set to satisfy the relation of 0.9900 < cos < .

According to the mold monitoring apparatus of the present invention, since the identification of the reference image data and the determination image data is determined by the state of the colored color having the specific color information in the image data acquired by the surveillance camera, High precision is obtained. Therefore, it is possible to reliably detect the operation abnormality and the molding abnormality in the resin molding machine.

1 is an explanatory diagram showing the configuration of a mold monitoring apparatus of the present invention together with the configuration of a resin molding machine.
2 is a block diagram showing a configuration example of a main body of a monitoring apparatus in the mold monitoring apparatus of the present invention.
3 is an explanatory diagram showing an allowable color range set based on a reference color defined in the RGB color space.
4 is an explanatory diagram schematically showing one example of (a) primary reference image data and (b) secondary reference image data.
Fig. 5 is an operation flow chart of a monitoring operation performed in the mold monitoring apparatus of the present invention. Fig.
Fig. 6 is an explanatory diagram showing an example of image data for the mold surface of the movable mold after completion of the mold opening operation, in which (a) is primary monitoring image data, and (b) is primary determination image data.
Fig. 7 is an explanatory view showing another example of image data for primary determination of the mold surface of the movable mold after completion of the mold opening operation. Fig.
Fig. 8 is an explanatory view showing an example of image data on the mold surface of the movable mold after completion of the molded product protruding operation, wherein (a) is image data for secondary surveillance, and (b) is secondary image data.
9 is an explanatory view showing another example of image data for secondary determination with respect to the mold surface of the movable mold after completion of the mold opening operation.

Hereinafter, embodiments of the present invention will be described in detail.

1 is an explanatory diagram showing the configuration of a mold monitoring apparatus of the present invention together with the configuration of a resin molding machine. 2 is a block diagram showing a configuration example of a main body of a monitoring apparatus in the mold monitoring apparatus of the present invention.

First, the construction of a resin molding machine will be described. The resin molding machine comprises a mold 11 constituted by a stationary die 12 and a movable die 13 which are mutually related to each other, and a resin material A mold driving unit 20 for performing mold opening and clamping of the mold 11 and a control unit 25 for controlling the operations of the injection unit 15 and the mold driving unit 20 And an injection molding machine (10).

The injection section 15 of the injection molding machine 10 has a cylindrical cylinder 16 having an injection nozzle 16a at the front end (left end in Fig. 1), a screw (not shown) arranged in the cylinder 16, And a hopper 18 connected to a supply port (not shown) provided on the outer circumferential surface of the rear end portion of the cylinder 16.

A heater (not shown) is provided on the outer circumferential surface of the cylinder 16, and the resin material injected into the hopper 18 is supplied into the cylinder 16 while being melted. The screw is arranged so as to be able to move back and forth along the axial direction of the cylinder 16 and the screw is rotated so that the resin material in a molten state is supplied while being kneaded from the rear end of the cylinder 16 toward the front end.

The mold drive unit 20 of the injection molding machine 10 includes a stationary platen 21 to which the stationary mold 12 is fixed and a stationary platen 21 to which the stationary platen 21 is fixed, A plurality of tie bars 23 for guiding the movable platen 22 in the horizontal direction and a movable platen 22 for moving the fixed platen 21 along the tie bar 23 And a die clamping and die opening mechanism 24 for performing a die clamping operation for moving the movable platen 22 forward with respect to the stationary platen 21 and a die clamping operation for moving the movable platen 22 backward with respect to the stationary platen 21. [

The mold monitoring apparatus 30 is provided with a surveillance camera 31 for imaging the mold surface of the movable die 13 in the mold 11 and a movable mold 13 And a monitoring device main body 40 for monitoring the state of the mold surface of the apparatus. The monitoring apparatus main body 40 in this example is connected to the control section 25 in the injection molding machine 10 via a signal input and output unit 35 and controls the operation of the injection molding machine 10. [ .

As the surveillance camera 31, any type of imaging a color image may be used. For example, a color CCD camera or the like can be used.

The monitor main body 40 includes a central control unit 41, an operation display unit 42, an image signal input unit 43 for inputting image signals from the surveillance camera 31, An image data recording section 45 for recording the image data processed by the image data processing section 44, and an image data recording section 45 for recording the information necessary for the operation of the central control section 41 And a ROM 47 in which a program for operating the central control unit 41 is recorded.

The operation display section 42 is constituted by, for example, a touch panel type operation display panel and includes various operation screens and setting screens for accepting input operations for operating the mold monitoring apparatus 30, Various image data such as image data and judgment image data are displayed.

The image data processing unit 44 sets the color of the molded or molded resin material for the molded product to be the reference color in the color image related to the image data acquired by the surveillance camera 31, And has a function of extracting (specifying) pixels having color information included in the set allowable color range, and performing image processing for calculating color image data in the image area constituted by the pixels having the specific color information.

More specifically, for example, as shown in Fig. 3, an allowable color range (an area to which an oblique line in Fig. 3 is given) is set to be the color information of the reference color? And the pixel having the color information included in the allowable color range acquired by the surveillance camera 31 is specified. The allowable color range can be set arbitrarily according to the conditions required for an actual molded product, the state of the mold surface of the movable mold 13 to be monitored, and other conditions, but it is preferable to set it as follows.

That is, in the plane perpendicular to the imaginary straight line X connecting the coordinates (R, G, B) of the reference color alpha and the black coordinates (0, 0, 0) , The allowable color range for the reference color? Is 0.9900 < cos? ≪ 1.0000 (when the angle made by the imaginary straight line Y connecting the black coordinates (0, 0, 0) 0.000 deg. ≪ theta < 8.100 deg.). This makes it possible to contrast image data of color having specific color information irrespective of brightness, and to obtain high precision. However, the black part is excluded.

Here, the color information (RGB value) of the reference color alpha can be obtained, for example, in a color image acquired by the surveillance camera 31 with respect to the mold surface of the movable die 13 after the die opening operation in a molding cycle Can be obtained by analyzing the color information of at least one pixel arbitrarily selected in the image area representing the molded product. The color information of each of the plurality of pixels arbitrarily selected in the image area representing the molded product may be analyzed and the average value of the color information of each pixel may be used as the color information of the reference color.

Data relating to the color information including the reference color and the allowable color range thereof is recorded in the image data recording section 45. [

In addition, primary image data and secondary reference image data are recorded in the image data recording section 45 in advance.

As shown in Fig. 4 (a), the primary reference image data is stored in the mold surface of the movable mold 13 in a normal state after completion of the mold opening operation of the injection molding machine 10, Is the data calculated by performing the above-described image processing on the color image obtained with respect to the mold surface of the movable die 13 in a state in which the molded article without the die is held. Therefore, the primary reference image data is related to the color of the specific color information in which the background image such as a mold is erased, and represents the shape of the molded article. In Fig. 4 (a), the mold surface 13a of the movable die 13 is indicated by a broken line for the sake of convenience.

As shown in Fig. 4 (b), the secondary reference image data is stored in the mold surface of the movable mold 13 in a normal state after completion of the molded product projecting operation of the injection molding machine 10, more specifically, Is the data calculated by performing the above-described image processing on the color image obtained with respect to the mold surface of the movable die 13. Therefore, the secondary reference image data does not have a colored color having specific color information. 4 (b), for the sake of convenience, the mold surface 13a and the molding area MA of the movable die 13 are indicated by broken lines.

As the primary reference image data and the secondary reference image data, the position data for each of the plurality of pixels constituting the color image acquired for the mold surface of the movable die 13 and the luminance data for each of the plurality of pixels May be recorded. The brightness data is represented by a relative value with respect to each of the pixels in the image of the mold surface by an integer of 0 to 255 with the minimum value being 0 and the maximum value being 255. [

Hereinafter, the operation of the monitoring apparatus of the present invention will be described in a case where the mold surface of the movable die 13 of the mold 11 in the injection molding machine 10 during automatic operation is monitored to control the operation of the injection molding machine 10 For example,

During automatic operation of the injection molding machine 10, a mold engagement permission command and a molded article projection prohibition command are output from the monitoring device main body 40 of the mold monitoring device 30 through the signal input / output device 35, The molding cycle of the injection molding machine 10 is started.

Specifically, a mold clamping operation is performed in which the movable platen 22 is advanced along the tie bar 23 toward the stationary platen 21 in the mold driving unit 20 of the injection molding machine 10. [ As a result, the mold surface of the movable mold 13 fixed to the movable platen 22 is pressed against the mold surface of the stationary mold 12 fixed to the stationary platen 21. As a result, . Next, the injection operation for injecting the molten resin material in the cylinder 16 from the injection nozzle 16a into the molding space of the mold 11 is performed in the injection section 15 of the injection molding machine 10 , The molten resin material is filled in the molding space of the mold 11. Thereafter, the resin material in the mold 11 is cooled and solidified, whereby a molded article can be obtained. Next, in the mold driving portion 20 of the injection molding machine 10, a mold opening operation is performed in which the movable platen 22 is retracted along the tie bar 23, so that the mold surface of the movable mold 13 is fixed 12).

When the mold opening operation of the injection molding machine 10 is completed, a mold opening limiting signal is outputted from the control unit 25 of the injection molding machine 10 and monitored by the mold monitoring device 30 through the signal input / And is input to the apparatus main body 40. Thus, a mold clamping prohibition command is outputted from the monitoring apparatus main body 40 of the mold monitoring apparatus 30 and inputted to the control section 25 of the injection molding machine 10, whereby the mold opening state of the injection molding machine 10 is maintained In addition, the timer is activated in the monitor main body 40, and the primary surveillance operation is performed after the wait time set in the timer elapses after the mold opening restriction signal is input in the mold monitoring device 30 . Here, the waiting time set in the timer is, for example, 0.1 to 0.4 sec.

In this primary monitoring operation, as shown in Fig. 5, first, the surveillance camera 31 picks up the mold surface of the movable die 13, thereby acquiring the primary monitoring image data of the mold surface of the movable die 13 (Step 1). Fig. 6 (a) shows an example of image data for primary surveillance. In this example, a state in which the molded article is held is shown in each of four molding areas MA in the mold surface 13a of the movable die 13, for example.

Next, image processing of the primary monitoring image data is performed by the image data processing section 44 in the monitoring apparatus main body 40. [ That is, a pixel having color information included in the allowable color range set based on the color information of the reference color (the color of the molded product) in the color image related to the primary monitoring image data is extracted (specified) (step 2) . Then, as shown in Fig. 6 (b), the color C in the image area constituted only by the pixel having the specific color information is calculated as the primary determination image data (step 3). The primary determination image data is displayed on the operation display section 42 of the monitoring apparatus main body 40 together with the primary reference image data.

The primary determination image data thus obtained is compared with the primary reference image data, and a determination process is performed to determine whether the primary reference image data matches the primary determination image data (step 4).

Specifically, in this determination process, the shape of the colored ink C in the primary determination image data is compared with the shape of the colored ink in the primary reference image data, so that the identities of both image data are determined . As described above, the primary reference image data is related to the color of the oil representing the shape of the molded article. Therefore, by using the color image area as a monitoring area for monitoring the shape of the molded product and analyzing the state of the colored color (C) in the image area of the primary determination image data corresponding to the monitoring area, It is possible to determine both sides of the primary shape. It is also possible to determine the state of the mold surface 13a of the movable mold 13 by analyzing the presence or absence of a pixel having specific color information in an area other than the image area corresponding to the surveillance area in the image data for primary determination can do.

When the state of the colored color C associated with the image data for primary determination is within the allowable range set based on the primary reference image data, it is determined that the primary determination image data matches the primary reference image data. In this case, since the obtained molded article is a superior article and the molded article is held in the molding area of the mold surface 13a of the movable mold 13, the operation of the injection molding machine 10 is regarded as normal, The operation of the injection molding machine 10 is continued.

On the other hand, when the state of the color of the primary color image data is outside the allowable range set on the basis of the primary reference image data, it is determined that the primary color image data is different from the primary reference image data, Is considered to have occurred. In this case, the operation of the injection molding machine 10 is stopped (step 5).

For example, as shown in Fig. 7 (a), when a part of pixels of the image area corresponding to the surveillance area in the image data for primary determination does not have specific color information, It is considered that at least a part of the molded product is in a released state from the molding area MA in the mold surface 13a and that a molding abnormality or an operation abnormality has occurred. 7B, in the case where pixels having specific color information exist in an area other than the image area corresponding to the surveillance area in the image data for primary determination as well, Or more and / or molding abnormality has occurred. Examples of such a case include a state in which the molded article is detached from the forming area of the movable mold 13 after the completion of the mold releasing operation of the injection molding machine 10 or the completion of the molded article protruding operation and attached to the non- ), Or a state in which the molded article forming material is attached to the non-molding area, or the like.

The primary reference image data and the primary determination image data are displayed on the operation display section 42 of the monitor main body 40 so that the user confirms the image data displayed on the operation display section 42, 10 can be distinguished from the molding abnormality or from the operation abnormality of the injection molding machine 10.

When the operation of the injection molding machine 10 is continued by the primary monitoring operation and the operation of the injection molding machine 10 is regarded as normal and the operation of the injection molding machine 10 is continued, A command signal is output (step 5). The molded product projecting request command signal is inputted to the control unit 25 of the injection molding machine 10 through the signal input and output unit 35 so that the projecting pin can be moved in the injection molding machine 10, 13 are protruded from the mold surface of the mold.

Upon completion of the molded product projecting operation of the injection molding machine 10, a molded product projection completion signal from the control unit 25 of the injection molding machine 10 is input to the central control unit 41 of the monitor main body 40, The timer operates in the apparatus main body 40 (step 6). Then, after the waiting time set in the timer has elapsed from the input of the molded product projection completion signal, the secondary monitoring operation is executed.

In this secondary surveillance operation, the surveillance camera 31 first captures the surface of the movable die 13, thereby acquiring image data for secondary surveillance on the surface of the movable die 13 (step 7). An example of secondary monitoring image data is shown in Fig. 8 (a). In this example, a state in which the molded article is normally released is shown in each of the four molding areas MA in the mold surface 13a of the movable die 13, for example.

Next, the image data processing section 44 of the monitoring apparatus main body 40 performs image processing of this secondary monitoring image data. That is, a pixel having color information included in the allowable color range set based on the color information of the reference color (the color of the molded product) in the color image related to the secondary monitoring image data is specified (extracted) (step 8) , The secondary determination image data is calculated (step 9). Fig. 8 (b) shows the secondary determination image data corresponding to the secondary monitoring image data shown in Fig. 8 (a). This secondary determination image data is a state in which the molded product is normally released, and thus does not have a colored color. This secondary determination image data is displayed on the operation display section 42 of the monitoring apparatus main body 40 together with the secondary reference image data.

The secondary determination image data thus obtained is compared with the secondary reference image data to determine whether or not the secondary determination image data and the secondary reference image data coincide with each other (step 10). Concretely, based on the presence or absence of a color in the secondary determination image data, the identity of the secondary determination image data and the secondary reference image data is determined.

As shown in Fig. 8 (b), when the image data for secondary determination does not have the color of the reference color, it is determined that the image data for secondary determination coincides with the secondary reference image data. In this case, the molded product is in a state of being released from the molding area MA on the mold surface of the movable mold 13, and the operation of the injection molding machine 10 is regarded as normal. Then, the operation of the injection molding machine 10 is continued, for example, the next molding cycle is started (step 11). When the molded product is released from the mold surface of the movable mold 13, the molded mold product is taken out from the injection molding machine 10, for example, by a molded product take-out apparatus or the like.

On the other hand, when the image data for secondary determination has an oil color, it is determined that the secondary reference image data is different from the secondary reference image data and it is regarded that an operation error of the injection molding machine 10 has occurred. In this case, a determination process (t > T) is made as to whether or not the elapsed time t from the execution of the first molded product projecting operation exceeds the preset time T. [ When the preset time T has not elapsed from the first molded product projecting operation, the molded product projecting request command signal is outputted again from the central control unit 41 of the monitor main body 40 (step 5) The protruding operation of the molded product is performed again. When the molded product projecting operation is completed in the injection molding machine 10, the secondary monitoring operation is executed again (ste p7 to step 10) with the input of the molded product projection completion signal as an opportunity (step 6). The protruding operation of the molded product of the injection molding machine 10 and the re-execution of the secondary surveillance operation of the mold monitoring apparatus 30 can be performed by judging that the secondary determination image data matches the secondary reference image data by the secondary monitoring operation, Until a predetermined time T elapses from the projecting operation.

Even if the operation for protruding the molded product and the re-execution of the secondary surveillance operation are repeated until a predetermined time T elapses from the first molded product projecting operation, when it is judged that the secondary determination image data is different from the secondary reference image data in the secondary monitoring operation , It is considered that an operation abnormality of the injection molding machine 10 has occurred. In this case, the operation of the injection molding machine 10 is stopped (step 12).

For example, as shown in Fig. 9 (a), when a pixel (specific color C) having specific color information exists in a part of the image area corresponding to the surveillance area in the secondary determination image data , It is regarded that the molded product is in a state in which at least a part of the molding area MA in the mold surface 13a of the movable die 13 is held and an operation abnormality occurs. 9 (b), a pixel (specific color C) having specific color information is present in an area other than the image area corresponding to the surveillance area in the secondary determination image data It is regarded that an operation error has occurred in the same manner. As an example of such a case, there is a case in which the molded article is detached from the molding area MA of the movable mold 13 after the completion of the molded product projecting operation of the injection molding machine 10 and attached to the un- Or in a state in which it is attached to the molding area MA and the non-molding area while being displaced from the molding area MA of the mold.

The secondary reference image data and the secondary determination image data are displayed on the operation display section 42 of the monitor apparatus main body 40 so that the user confirms the image data displayed on the operation display section 42, 10) can be identified.

As described above, in the mold monitoring apparatus of the present invention, the reference image data related to the reference state of the mold surface of the movable mold 13 in the mold 11 and the reference image data related to the mold surface of the movable mold 13 Color image data composed of only the pixels having the color information within the allowable color range set with respect to the reference color is used as the determination image data indicating the state of the reference color . That is, in the color image related to the image data acquired by the surveillance camera 31, the background image such as the mold 11 is erased, and the reference image data And the image data for judgment are made. In the primary monitoring operation, the identities of the primary reference image data and the primary determination image data can be determined based on the shape of the colored reference. In addition, in the secondary monitoring operation, it is possible to determine the identity of the secondary reference image data and the secondary determination image data based on the presence or absence of the color of the oil.

Therefore, according to the mold monitoring apparatus of the present invention, since the coincidence and the difference between the reference image data and the judgment image data can be discriminated with high accuracy, it is possible to reliably detect the operation abnormality and the presence or absence of molding abnormality in the injection molding machine .

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, but various modifications can be added.

For example, the color space defined when setting the allowable color range for the reference color is not limited to the RGB color space, and another color space may be used.

The color information of the reference color need not be obtained by analyzing the image area representing the molded product in the image data actually acquired by the surveillance camera.

In addition, in the primary monitoring operation and the secondary monitoring operation, the determination based on the luminance data may be performed in addition to the determination based on the color state (color determination).

10: injection molding machine 11: mold
12: stationary type 13: movable type
13a: mold face of movable mold 15:
16a: injection nozzle 16: cylinder
17: screw drive mechanism 18: hopper
20: mold drive unit 21: stationary platen
22: movable platen 23: tie bar
24: fastening and die opening mechanism 25:
30: mold monitoring device 31: surveillance camera
35: Signal input / output device 40:
41: central control unit 42: operation display unit
43: image signal input unit 44: image data processing unit
45: image data recording unit 46: RAM
47: ROM C: U Color
MA: molding area

Claims (5)

A surveillance camera for capturing the mold surface of the mold in the resin molding machine as a color image and a surveillance device main body for monitoring the condition of the mold surface based on the image data acquired by the surveillance camera,
Reference image data relating to a reference state of the mold surface of the mold is recorded in advance in the monitoring apparatus main body,
Wherein the monitoring apparatus main body compares the reference image data with determination image data acquired with respect to the mold surface of the mold in a mold opening state in the molding cycle of the resin molding machine, Wherein the control unit has a function of determining whether or not a state of a color image having specific color information in the reference image data is within an allowable range set with reference to the reference image data. The method according to claim 1,
The monitoring apparatus main body has a function of executing a primary monitoring operation for monitoring the state of the mold surface after completion of the mold opening operation in the molding cycle of the resin injection molding machine,
Image data relating to a colored color having specific color information indicating the molded article in a color image obtained by picking up a mold surface of the mold while the molded article is held in a molding area is recorded as primary reference image data,
In the primary surveillance operation, image data related to the colored color having specific color information indicating the molded article in the color image obtained by picking up the mold surface of the movable mold after completion of the mold opening operation of the resin molding machine Wherein the first determination image data and the primary reference image data are acquired as image data for primary determination, and the shape of the color of the color associated with the primary determination image data is compared with the shape of the color of the primary color associated with the primary reference image data, Is judged to be the same. The method of claim 2,
The monitoring apparatus main body has a function of executing a secondary monitoring operation for monitoring the mold surface of the mold after the completion of the molding operation of the molded product in the molding cycle of the resin molding machine,
The image data relating to the colored color having the specific color information in the color image obtained by picking up the mold surface of the mold in which the molded product is released from the molding area is recorded as the secondary reference image data,
In the secondary monitoring operation, the image data related to the color of the color having the specific color information in the color image obtained by picking up the mold surface of the mold after completion of the molded product projecting operation of the resin molding machine is stored as the secondary reference image data And the identity of the determination image data and the secondary reference image data is determined by the presence or absence of the color of the secondary determination image data. The method according to claim 2 or 3,
Wherein the oil color is constituted by pixels having color information included in an allowable color range set based on color information of the reference color when the color of the molded product is a reference color. The method of claim 4,
The allowable color range is defined by a virtual line X connecting the coordinates (R, G, B) of the reference color defined in the RGB color space with the coordinates (0, 0, 0) 0, 0) is defined as? (?), An angle formed by an arbitrary imaginary straight line Y passing through the mold is set so as to satisfy a relation of 0.9900 < cos? ≪ 1.0000.

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