JPH07243831A - Spinneret automatic inspection device and inspection method - Google Patents

Abstract

(57) [Summary] [Object] To provide an apparatus and an inspection method for automatically inspecting clogging of a plurality of spinneret holes. [Structure] A device 1 comprises a support base 2 and a cross-section square-shaped support base 3, and a computer 19 in which the basic conditions of a base plate P on the support base are stored in advance is set by a multi-servo controller 18 to slide members 7, 10 , 11 for X
The CCD camera 13 is aligned with one hole of the base plate P on the support 2 by moving in the axis, Y-axis, and Z-axis directions, light is emitted from the lighting fixture 6, and the hole is enlarged by the magnifying lens 12. The image is displayed on the CCD camera 13, the slide members 7, 10 and 11 are further moved by the multi-servo controller 18, and the images are sequentially displayed on the CCD camera 13, and the image of the image processing device 20 is input to the computer 19, which is stored in advance in the computer 19. The clogging rate of the hole is determined by comparing the diameter of the die hole of the data thus obtained with the hole projected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinneret automatic inspection apparatus and inspection method, and more specifically, it automatically checks the quality of the shape of holes in a spinneret (hereinafter simply referred to as a spinneret), a hole clogging rate, a defective hole and the like. The present invention relates to an inspection device and an inspection method for making a physical determination.

[0002]

2. Description of the Related Art In the spinning technology, if the holes in the spinneret are dirty or if impurities are attached to the holes, there is a problem that spinning may not be possible due to thread breakage during spinning.
This is the lifeline of spinning technology. As shown in FIG. 6, the conventional mouthpiece inspection apparatus is provided with a mouthpiece support base 62 orthogonal to the magnifying lens 61, and an illumination 63 installed upward at the bottom thereof, and the mouthpiece plate P is placed on the mouthpiece support base 62. In general, a structure of manually moving back and forth and left and right is adopted, and each hole is inspected for dirt, and each hole is cleaned with dust or air.

Generally, there are many holes of 1 mm or less in the die (depending on the shape of the die, dozens to several hundreds in the case of a round type, hundreds to several in the case of a rectangle). (Thousands), the conventional device requires a huge amount of manpower and time for hole inspection and hole cleaning, and it is difficult to do long-time inspection because eyes are tired, and hole cleaning tends to be neglected. In addition, there is a problem in that there are individual differences in hole inspection and hole cleaning.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the above-mentioned problems of conventional mouth hole inspection and cleaning, and to provide an apparatus and an inspection method for automatically inspecting a plurality of mouth holes. , To improve inspection accuracy and cleaning, and to reduce inspection and cleaning time.

[0005]

According to a first aspect of the present invention, a support table on which a plate having a plurality of mouth holes is placed is three-dimensionally orthogonal to each other in three axial directions of X-axis, Y-axis and Z-axis. A slide member that can slide independently is attached, a charge-coupled device camera having a magnifying glass is attached to the slide member, and a lighting fixture is attached under the support, while The slide members are respectively connected to the multi-servo controller, and further, the multi-servo controller is connected to the computer, and the charge-coupled device camera is connected to the computer via the image processing device. A plurality of cap holes for mounting the charge-coupled device camera on a support by moving the slide members in the X-axis, Y-axis, and Z-axis directions, respectively. It is successively matched, a mouthpiece automatic inspection apparatus configured to determine the pore clogging ratio of light emitted is received by the charge coupled device camera from the luminaire.

According to a second aspect of the present invention, when the clogging of the plurality of die holes is inspected, the plurality of die holes are sequentially irradiated with light,
The area of the hole clogging is measured by receiving the transmitted light with a CCD camera and performing image processing. On the other hand, the cross section in a clean state where the holes are not clogged and the hole cross section in the clogged state are clogged. This is a method for inspecting a die hole in which a clogging rate is determined and a clogging rate of a specified value or more is determined as a defective hole.

[0007]

【Example】

Embodiment FIG. 1 shows an embodiment of the apparatus of the present invention. Next, the inspection apparatus and the inspection method of the present invention will be specifically described with reference to the drawings. The device 1 of the present invention comprises a support base 2 and a support base 3 having a square cross section. As shown in FIG. 2, the support base 2 has an opening 4 formed on the plate P mounting surface, a frosted glass 5 is attached to the lower side thereof, and a lighting fixture 6 is further attached to the lower side thereof.

The support base 2 is a receiving base 3 having a square cross section.
A slide member 7 is attached to the back side of the support base 2 while penetrating the inside. The support base 2 is fixed to a pedestal (not shown), and the slide member 7 is composed of two rail-shaped projections 9 inside a frame 8 formed in a concave cross section as shown in FIG. The rail-shaped projection 9 is slidably attached to the inner surface of the pedestal 3 having a square cross section, and the pedestal 3 having a square cross section is slid by the slide member 7 in the left-right direction (X-axis direction in FIG. 1). It is possible.

Reference numeral K in FIG. 3 denotes a drive shaft, which is provided with a drive device such as a motor and a rotary encoder (not shown), and rotates the drive shaft by a predetermined angle (see FIGS. 4 and 5 to be described later). The same). The shapes of the support base 2 and the square-shaped cross-section receiving base 3 are not limited to these.
An appropriate shape can be used if necessary.

Slide members 10 and 11 are attached to the outside of the upper portion of the pedestal 3 having a square cross section.
Further, a CCD camera 13 having a magnifying lens 12 is attached toward the support base 2. Slide member 10
4 is composed of two rail-shaped projections 15 inside a frame 14 having a concave cross section, and is slidably attached to the slide member 11 by the two rail-shaped projections 15. A CCD camera 13 can be slid by 11 in a direction (Y-axis direction in FIG. 1) orthogonal to the X-axis sliding direction.

Further, the slide member 11 is attached to the slide member 10 via an L-shaped metal fitting, and as shown in FIG. 5, two rail-shaped projections 17 are vertically provided inside a frame 16 having a concave cross section. , And the CCD camera 13 is movable in the vertical direction (Z-axis direction in FIG. 1) by the two rail-shaped projections 17. That is, the CCD camera 13 attached to the slide member 11 can be moved to arbitrary positions of the X axis, Y axis, and Z axis on the support base by the slide members 7, 10, 11.

On the other hand, the slide members 7, 10 and 11
Are connected to the computer 19 via the multi-servo controller 18, and the CCD camera 13
Through the image processing device 20 and the computer 19
Connected with. In FIG. 1, reference numeral 21 is a monitor, P
Is a spinneret plate, and Pr is a printer.

The computer 19 has a hole radius,
Hole pitch, number of holes per row, number of rows, row pitch,
Since the basic conditions of the die plate P such as the shape of the die (rectangular shape or circular shape), the size of each portion, the position of the hole at the beginning of the inspection, etc. are different, these necessary data are stored and set each time.

To inspect the mouthpiece hole, the mouthpiece plate P
Is placed on the support base 2, the computer 19 operates the multi-servo controller 18, and the slide member 7,
Move 10 and 11 respectively in the X-axis, Y-axis, and Z-axis directions, and
After the CD camera 13 is positioned right above one of the plurality of holes of the mouth hole plate P, light is emitted from the lighting device 6 and the hole is enlarged by the magnifying lens 12 to be projected on the CCD camera 13. The state of the enlarged hole at that time can be observed directly on the monitor 21.

The base plate P in the illustrated example has a width of 200 m.
It has a rectangular shape of m, length 2000 mm, and has a die hole diameter of 0.4 mm and a hole number of 3500. The computer 19 has a hole radius, a hole pitch, the number of holes per row, the number of rows, the row pitch, Necessary data such as the dimensions of each part of the die and the position of the hole at the beginning of the inspection are stored in advance. The multi-servo controller 18 uses the slide members 7, 10, 11 according to the data stored in the computer 19 in advance. To move. The spinneret plate P was placed in a fluidized tank for 4 hours to burn the resin component, washed with warm water, ultrasonically washed for 4 hours, dried, and then placed on the support 2.

The mouth hole projected by the CCD camera 13 is subjected to image processing by the image processing device 20, and the image is input to the computer 19. The device of the present invention is a CCD camera 13.
One of the features is that the CCD camera 1
The image received in 3 is decomposed into hundreds of thousands of pixels, and the brightness of the screen is decomposed into hundreds of gradations.

In addition, the brightness of the screen is binarized into white and black depending on whether it is light or dark with reference to this threshold, for example, when 40 gradations are used as a threshold. As a result, the brightness of the light transmitted through the mouth hole is distinguished into a white part and a black part, and the black part is a simple judgment as to whether or not there is a foreign substance. The area of the foreign substance existing portion is calculated by integrating. still,
The threshold value can be empirically obtained from a conventional visual inspection result.

However, if there is distortion, noise, or the like inside the circumference of the hole, there is a risk that it will be determined as dirt or the presence of foreign matter. Therefore, in the present invention, a part of the inner circumferential portion of the hole is masked (excluded from the calculation of the area of the hole) to eliminate the error in the state of the dirt of the hole. That is, measure the radius of the hole from the screen,
If the difference is within 10 μm, for example, the measured radius is set as a reference radius, and a few μm inside (for example, 5
μm) is excluded from the calculation of the area of the hole, and the area of the hole obtained here is 100%.

In this case, the masked portion can be empirically obtained from the value obtained by the conventional method, and if the area of the hole excluded from the reference radius is set as the reference area, it is stored and set in the computer 19 in advance. good. Further, the value can be appropriately changed depending on the inspection target plate P.

Next, the area of the black portion (area of dirt or foreign matter) inside the masked die hole is measured. A value obtained by dividing this area by the reference area is defined as the clogging rate. If the clogging rate of the hole of the die plate P to be inspected is 1.0% or more, this value should be stored and set in the computer 19. In this case, a defective hole (hereinafter referred to as NG) can be easily determined based on this value, and the hole can be cleaned.

The apparatus of the present invention is a computer 19
Incorporate software required for inspection, and install the multi-servo controller 18 to slide the slide members 7, 10 in X
The CCD camera 13 is supported on the support base 2 by sliding it in the axial and Y-axis directions
Sequentially align with one of the plurality of holes of the upper die hole plate P, and further move the slide member 11 in the Z-axis direction to C
Focusing of the CD camera 13 is performed.

It should be noted that the base plate P does not have a completely flat shape but has a large or small bend, and therefore the CCD
There is a possibility that the relative distance between the camera 13 and the base plate P changes and the focal point shifts, so that the clogging rate cannot be accurately measured. Therefore, it is preferable to use the CCD camera 13 with an automatic focusing device.

In the computer 19, the radius of the holes of the die plate P, the pitch of the holes, the number of holes per row, the number of rows, the pitch of the rows, the dimensions of each part of the die, the position of the holes at the beginning of the inspection. Since the basic conditions of the equal-coupling plate P are stored and set, the operator can automatically inspect and finish the plurality of holes by simply pressing the start button.

Since the inspection result is stored in the computer 19, if the inspection result is printed out by the printer Pr later, the NG hole is displayed as coordinates.
Therefore, no labor is required during the inspection, and the holes may be appropriately cleaned after that. If there are too many NG holes, the ultrasonic cleaning machine may be used again for cleaning, and the inspection may be performed again to reduce the NG holes.

In the above example, the inspection time per hole was about 2 seconds, the moving time of the CCD camera was about 1 second, and the inspection time for all holes was about 3 hours. Further, manpower was required only for setting the first base plate P for the inspection of the holes, but it was unattended during the inspection. When the inspection results were printed out and when the hole clogging rate was NG as 1.0% or more, the number of NG was 192 and the NG rate was 5.5%. After the inspection, cleaning was continued, but since the position of the NG hole was printed out in coordinates, the cleaning hole was easily found, and the hole cleaning was completed in about 20 minutes.

Comparative Example After the same die plate P as in the example was burned, washed with warm water, ultrasonically washed and dried in the same manner as in the example, each hole of the die plate was inspected by the conventional device of FIG. The NG hole was cleaned. It takes 10 seconds per hole to move the microscope, focus, and clean the holes, and if you do it continuously, the eyes are tired for 1 hour and you cannot continuously inspect it. Took more than 10 hours.

[0027]

As described above, in the apparatus of the present invention, the slide member is moved by the multi-servo controller in the X-axis, Y-axis,
Moving in the three axes of the Z-axis to position the CCD camera on one of a plurality of holes in the base plate placed on the support table in order to receive light and perform computer processing through the image processing device. Therefore, it is possible to automatically process the plurality of mouthpiece holes in a short time.

Further, according to the method of the present invention, the image of the holes is projected by using the CCD camera, and the accurate clogging rate of the plurality of holes of the die plate can be easily obtained from the data stored in advance in the computer. Therefore, it is possible to inspect the clogging state of the hole easily and accurately without any individual difference at the time of measurement.

Further, according to the method of the present invention, the image received by the CCD camera can be decomposed into hundreds of thousands of pixels, and the brightness of the screen is binarized into white and black with an arbitrary threshold value as a reference, and a black hole is formed. Since the clogging rate can be easily determined as an NG hole, the hole determined to be an NG hole may be cleaned. Also,
The accuracy can be easily changed by appropriately changing the clogging rate.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of an embodiment of an apparatus of the present invention.

FIG. 2 is an exploded perspective view of a main part of FIG.

FIG. 3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a cross-sectional view taken along the line BB in FIG.

5 is a cross-sectional view taken along the line CC in FIG.

FIG. 6 is a front view of an example of a conventional device.

[Explanation of symbols]

 1: Device of the present invention 2: Supporting stand 3: Cross-section square-shaped receiving stand 4: Opening part 5: Frosted glass 6: Lighting equipment 7, 10, 11: Sliding member 8, 14, 16: Frame 9, 15, 17: Rail-shaped projections 12: Magnifying lens 13: CCD camera 18: Multi-servo controller 19: Computer 20: Image processing device 21: Monitor P: Cap hole plate Pr: Printer

Claims (2)

[Claims] 1. A slide member capable of independently sliding in three axial directions of three-dimensionally orthogonal X-axis, Y-axis, and Z-axis is attached to a support table on which a plate having a plurality of cap holes is placed. And a charge-coupled device camera equipped with a magnifying glass is attached to the slide member, and a lighting fixture is attached under the support, while the slide members are connected to a multi-servo controller, respectively. Furthermore, the charge-coupled device camera is connected to a computer via a multi-servo controller, and the charge-coupled device camera is connected to a computer via an image processing device. By moving the charge-coupled device camera to one of a plurality of base holes mounted on the support base in order to move in the direction of the axis and the Z-axis. An automatic spinneret inspecting device, characterized in that light emitted from an illuminating device is received by a charge-coupled device camera to obtain a hole clogging rate. 2. When inspecting for clogging of a plurality of spinneret holes, the plurality of spinneret holes are sequentially irradiated with light, and the transmitted light is received by a charge-coupled device camera to be image-processed. The area of clogging is measured, and on the other hand, the clogging rate is calculated from the cross-sectional area of the hole in a clean state without clogging and the cross-sectional area of the hole in the clogging state, and the clogging rate is determined to be a defective hole or more. A method for inspecting a spinneret hole, which is characterized in that