JP7392014B2 - How to detect dirt - Google Patents

Description

The present invention relates to a guide for a colorimeter used in a colorimeter for detecting dirt on a curved, high-temperature object to be measured, and a method for detecting dirt.

Conventionally, as a device for acquiring color information, there has been a color information acquisition device that acquires color information from a test paper that shows a color reaction depending on the type and concentration of a component in a sample, and a calculation device that receives color information from this color information acquisition device. This arithmetic device includes a storage section that stores information on the type and concentration of the component of the sample corresponding to the color information of the test strip as a database, and a storage section that stores information on the type and concentration of the component of the sample corresponding to the color information of the test strip, and a storage section that stores information on the type and concentration of the component of the sample corresponding to the color information of the test strip, and a storage section that stores information on the type and concentration of the component of the sample corresponding to the color information of the test strip, and a storage section that stores information on the type and concentration of the component of the sample corresponding to the color information of the test strip. A component analyzer is known that is provided with an information processing unit that acquires component information of a corresponding specimen from color information, and a display unit that displays the component information of the specimen acquired by this information processing unit (for example, (See Patent Document 1).

JP 2021-120658 Publication

A portable colorimeter is known as a means of measuring such colors (stains), but this type of colorimeter requires the tip of the detection unit to be brought into contact with a flat object to be measured. Some devices measure color in a state where no light enters, and when measuring the color of a curved object, light leaks through the gap between the contact surfaces, making it difficult to make accurate measurements. .

In addition, as a general rule, color measurement is sometimes carried out with the tip of the detection unit in contact with the surface to be measured, and there is a problem that the heat resistance is low and high temperature objects cannot be measured.

For example, when measuring the color of a mold that can reach high temperatures, if the heat resistance of the colorimeter is low, the mold must be cooled before color measurement, and the cooling time must be ensured. There is also the problem of not being able to do so.

However, no effective method has been found to quantify contamination on color measurement objects that have a curved shape and reach high temperatures, such as molds, and the only option was to perform unreliable visual confirmation. .

The present invention has been made in view of these points, and its purpose is to make it possible to quantify the contamination of an object to be measured even if it has a curved shape or a high temperature.

In order to achieve the above object, in the present invention, a guide is attached to the tip of the detection section of the colorimeter so that color measurement can be performed even on a curved object to be measured at high temperature.

Specifically, the first invention includes a guide body having a colorimeter accommodating part into which a detection part of a colorimeter is inserted and the colorimeter is fixed;
a detection through-hole formed at the bottom of the colorimeter accommodating section and exposing the detection section;
a first guide surface formed on the periphery of the detection through hole and curved to match the colorimetric surface of the colorimetric object;
By separating the first guide surface and the detection section of the colorimeter by a predetermined distance, a colorimetric distance between the colorimetric surface of the curved object to be measured and the detection section is ensured. .

According to the above configuration, when the detection part of the colorimeter is inserted into the colorimeter housing part and fixed, a predetermined distance is maintained between the first guide surface and the detection part, so that a colorimeter with a low heat-resistant temperature can be used. This makes it possible to measure the color of a high-temperature object. In addition, since the first guide surface is curved to match the colorimetric surface of the object to be measured, color measurement can be performed with the first guide surface in close contact with the curved colorimetric surface of the object to be measured. , which prevents light from leaking and enables accurate color measurement.

In the second invention, in the first invention,
A second guide surface is formed which is continuous with the first guide surface and intersects substantially perpendicularly to the first guide surface.

According to the above configuration, by bringing not only the first guide surface but also the second guide surface into contact with the object to be measured, accurate measurement of the object to be measured can be performed in a more stable state and while preventing light leakage. Color becomes possible. Here, "substantially perpendicular" means that it is not completely perpendicular but may be inclined by approximately ±20° from the perpendicular. In short, the second guide surface may have any shape as long as it cooperates with the first guide surface to stably contact the object to be measured.

In the third invention, in the second invention,
The second guide surface is provided with a magnet that attracts the object to be measured.

According to the above configuration, by providing the magnet on the second guide surface, the colorimetric guide can be attracted to the colorimetric object made of a magnetic material, and accurate colorimetry can be performed in a more stable and close contact state.

In the fourth invention, a preparatory step of inserting the detection part of the colorimeter into a colorimeter accommodating part provided in the guide body of the colorimeter guide and having a detection through hole to fix the colorimeter;
The curved first guide surface of the guide body is brought into contact with the curved surface to be measured of a clean reference product to ensure a colorimetric distance between the surface to be measured of the reference product and the detection unit. a reference color storage step of measuring the colorimetric surface of the reference product in a state in which the color is measured and storing the reference value;
The curved first guide surface of the guide body is brought into contact with the curved colorimetric surface of the colorimetric object, and the colorimetric distance is set between the colorimetric surface of the colorimetric object and the detection unit. a colorimetric step of measuring the colorimetric surface of the colorimetric object while ensuring that
The colorimetric value stored in the reference color storage step is compared with the colorimetric value in the colorimetric step, and if the color difference becomes larger than a predetermined value, it is determined that staining has occurred.

According to the above configuration, by inserting and fixing the detection part of the colorimeter into the colorimeter housing part, the first guide surface and the detection part are separated by a predetermined distance. This makes it possible to measure the color of a high-temperature object. In addition, since the first guide surface is curved to match the colorimetric surface of the object to be measured, stable colorimetry can be performed with the first guide surface in contact with the curved surface of the object to be measured. It becomes possible. Then, measure the color of the color measurement surface of the clean reference product under the same conditions as possible in advance, and compare the measured value with the measurement value of the dirty color measurement object to find that the color difference is greater than the predetermined value. If it becomes larger, it can be determined that dirt has occurred. In this way, dirt can be easily quantified and detected, so dirt can be detected more reliably than by visual inspection.

In the fifth invention, in the fourth invention,
Colorimetry is performed at a plurality of locations by moving a first guide surface provided on the guide body and a second guide surface substantially perpendicular to the first guide surface while contacting the object to be measured.

According to the above configuration, not only the first guide surface but also the second guide surface can be moved while being in contact with the object to be measured, and color measurement can be performed in close contact at multiple locations, so that stains can be detected reliably over a wide range. It becomes possible.

In the sixth invention, in the fifth invention,
The color of the colorimetric surface of the colorimetric object is measured with the magnet provided on the second guide surface being attracted to the side surface of the colorimetric object made of a magnetic material.

According to the above configuration, color measurement can be performed with the magnet on the second guide surface adsorbed to the side surface of the color measurement object made of a magnetic material, so accurate measurement values can be obtained while preventing light leakage in a more stable and close contact state. can get.

In a seventh invention, in any one of the fourth to sixth inventions,
After the mold is taken out from the press, the first guide surface is brought into contact with the surface of the mold to be measured without cooling, and the color is measured.

According to the above configuration, by attaching the colorimeter guide to the detection part of the colorimeter, it is possible to secure a distance from the colorimetric surface of the object to be measured, so even if the mold is at high temperature, colorimetry can be performed. becomes possible. Therefore, there is no need to stop the press for a long time.

In the eighth invention, in the seventh invention,
After measuring the color of the mold, if the color difference between the measured value and the reference value is greater than or equal to a predetermined value, the mold is cleaned and then reincorporated into the press machine.

According to the above configuration, dirt can be detected reliably by quantifying it based on the size of the color difference from the standard value, so compared to detecting dirt visually, there are fewer omissions in finding dirt, and as a result, the quality of molded products is reduced. will improve.

As described above, according to the present invention, by attaching a guide to the detection section of a colorimeter, it is possible to measure the color of even a curved object to be measured at high temperature.

FIG. 2 is a perspective view showing a state in which a semicircular arc-shaped mold is color-measured with a colorimeter equipped with a colorimeter guide. FIG. 3 is a perspective view showing a guide for a colorimeter. A colorimetric guide is shown, in which (a) is a plan view, (b) is a left side view, and (c) is a front view. 2 is a flowchart showing the procedure of a stain detection method using a colorimetric guide. It is a table showing the color difference before and after washing.

Embodiments of the present invention will be described below based on the drawings.

1 to 3 show a colorimeter guide 10 according to an embodiment of the present invention, in which the detection part 1c side of the colorimeter 1 is inserted and the colorimeter 1 is fixed. The guide main body 12 has a colorimeter accommodating section 11 in which a colorimeter is stored. The guide body 12 is made of a resin molded product such as monomer cast nylon, but may also be made of highly heat-resistant rubber such as fluororubber, metal, or the like. Monomer cast nylon has higher mechanical strength, thermal properties, chemical properties, and abrasion resistance than general nylon 6, and has relatively good heat resistance and excellent self-lubricating properties. . Further, if the rubber has high heat resistance, it can be appropriately deformed to match the shape of the surface to be measured. Furthermore, the guide body 12 may be formed by combining these materials to ensure heat resistance and to be appropriately deformable. The color of the guide body 12 is not particularly limited, and may be blue, but may also be black, which does not easily reflect light.

The colorimeter 1 of this embodiment has, for example, a cylindrical colorimeter main body 1a with an outer diameter of about 30 mm, and the cylindrical tip 1b has a slightly smaller diameter than the colorimeter main body 1a. Although not shown in detail, if the measured diameter of the detection section 1c, which has a built-in light emitting section, a light receiving section, etc., in the tip section 1b is, for example, 8 mm, an opening (through hole) with an inner diameter r1 of about 12 mm is formed on the tip side. ) 1d is formed, and the distal end surface of the detecting section 1c (tip section 1b) is brought into sealing contact with the surface to be measured of the object to be measured to perform color measurement while preventing light leakage. ing. In other words, the colorimeter 1 can measure color by shining light on a flat surface to be measured in close contact and using the reflected light, but if it is a curved surface to be measured, gaps may be created. However, there is a problem in that accurate color measurement is difficult.

Although the shape of the colorimeter accommodating portion 11 is not particularly limited, in this embodiment, it is configured as a recessed portion having a circular cross section in accordance with the external shape of the colorimeter 1.

The bottom portion 11a of the colorimeter accommodating portion 11 is provided with, for example, a circular detection through hole 13 that exposes the detection portion 1c. The inner diameter r2 of the detection through-hole 13 is desirably larger than the inner diameter r1 of the opening 1d of the colorimeter 1 (r2>r1) so that the color of the inner peripheral surface is not detected. A first guide surface 14 is formed around the periphery of this detection through-hole 13 and is curved to match the colorimetric surface of the colorimetric object. In this embodiment, the object to be measured is a half ring 2 which is a mold having a semi-circular outer diameter, and in order to measure the color of its inner circumferential surface, the first guide surface 14 is aligned with the curvature of the inner circumferential surface. is an arcuate curved surface that bulges outward when viewed from the front. On the other hand, when measuring the color of the outer circumferential surface of the half ring 2, for example, it is preferable to use an arcuate curved surface that is concave inward when viewed from the front. It is desirable that the radius of curvature of the first guide surface 14 matches the curved surface of the object to be measured, but by making the first guide surface 14 of a rubber material that is easily deformable, etc., a slight difference in size is allowed. It may be possible to do so. Further, the shape of the object to be measured is not limited to this, and the object to be measured is not limited to a mold, but a curved object to be measured at high temperature is the object to be measured.

By using the colorimeter guide 10 of the present embodiment, the predetermined colorimetry distance h can be adjusted more easily than when the tip 1b of the detection unit 1c of the colorimeter 1 is brought into direct contact with the surface to be measured. It is now possible to maintain a safe distance. By ensuring this colorimetric distance h, it may become difficult to measure the correct absolute value of color, but it is possible to measure the color difference with the standard product.

The guide body 12 is formed with a second guide surface 15 that is continuous with the curved first guide surface 14 and intersects perpendicularly to the first guide surface 14 . In the present embodiment, the second guide surface 15 is continuous perpendicularly to the first guide surface 14 in accordance with the side shape of the half ring 2, but is placed about 20 degrees toward the front in accordance with the shape of the object to be measured. It may be inclined more than perpendicularly to the side or to the back. By bringing not only the first guide surface 14 but also the second guide surface 15 into contact with the object to be measured, the color of the object to be measured can be measured in a more stable and intimate state.

The second guide surface 15 is provided with, for example, two circular magnets 16 that attract the object to be measured. The shape and number of magnets 16 are not limited to these. The magnet 16 of the second guide surface 15 can be attracted to an object to be measured made of a magnetic material, such as a mold, and color measurement can be performed in a more stable state in close contact.

-How to detect dirt-
Next, a procedure for detecting dirt on a mold using the colorimeter guide 10 described above will be described.

A production line for resin molded products using a press machine such as an injection molding machine in a factory will be explained as an example.

First, in a preparation step, the detection section 1c of the colorimeter 1 is inserted into the colorimeter housing section 11, and the colorimeter 1 is fixed to the colorimeter guide 10.

Next, in the reference color storage step, the curved first guide surface 14 of the guide body 12 is brought into contact with the curved surface to be measured of a clean reference product, and the surface to be measured of the reference product and the detection unit 1c are brought into contact with each other. The colorimetric surface of the reference product is measured while maintaining the colorimetric distance h between the two and the reference value is stored. For example, the measured values are sent to a mobile communication terminal (not shown) that can communicate with the colorimeter 1, and the reference values are stored in an application on the mobile communication terminal and stored on a storage medium, server, etc. It's good to keep it. This standard color memorization step does not need to be performed multiple times once it is performed for the same mold.

Then, as shown in FIG. 4, in a production line where shift work is performed by day shift and night shift, shifts between day shift and night shift are performed in step S01.

Next, although not shown in detail, in step S02, the heated parts of the mold other than the upper and lower molds are taken out of the press and disassembled on a workbench in front of the press.

Next, in step S03, in a color measurement step, for example, the color (stain) of a medium size (half ring 2), which is a mold component that is easily stained, is measured using the colorimeter 1 to which the colorimeter guide 10 is attached. That is, after taking out the half ring 2 from the press, the first guide surface 14 is brought into contact with the colorimetric surface of the half ring 2 without cooling to obtain a sample color. Specifically, the curved first guide surface 14 of the guide body 12 is brought into contact with the curved surface to be measured (inner peripheral surface) of the half ring 2, and the surface to be measured (inner peripheral surface) of the half ring 2 is ) and the detection unit 1c, the surface to be measured of color of the half ring 2 is measured. At this time, with the magnet 16 provided on the second guide surface 15 adsorbed to the side surface of the half ring 2 made of a magnetic material, measuring the color of the inner circumferential surface of the half ring 2 where dirt is likely to occur will stabilize the workability. Good. Further, since it is not necessary to perform color measurement after cooling the half ring 2, workability is extremely good.

Next, in the determination step, the colorimetric value stored in the reference color storage step and the colorimetric value in the colorimetric step are compared, and if the color difference is larger than a predetermined value, it is determined that staining has occurred.

Specifically, in step S04, the reference color registered in advance (the color of the beautiful half ring 2 after cleaning) is compared with the sample color, and the color difference is calculated. In this case, for example, the measured value is transmitted to a mobile communication terminal that can communicate with the colorimeter 1, and the measured value is compared with a reference value stored in an application of this mobile communication terminal to calculate the color difference.

At this time, the first guide surface 14 provided on the guide body 12 and the second guide surface 15 substantially perpendicular to the first guide surface 14 are brought into contact with the color measurement surface of the half ring 2 and moved. Color measurement may be performed at multiple locations. For example, measurements are performed at three locations, X, Y, and Z, as in the example below.

Next, in step S05, for example, if the color difference is less than 12, it is determined that there is no problem with dirt, and the process proceeds to step S06. This determination may be made automatically using, for example, an application on the mobile communication terminal, or may be made by the user while looking at the screen.

On the other hand, if the color difference is 12 or more, it is determined that a stain problem has occurred, and the process proceeds to step S07 to perform simple cleaning (for example, dry ice cleaning) of the half ring 2. Mold cleaning is more effective when the mold is at a high temperature, so by determining color differences (stains) without cooling the mold, cleaning can be performed while the mold is still at high temperature, resulting in good work efficiency. After that, the process advances to step S06.

Then, in step S06, the mold parts are reinstalled into the press machine and pressing (production) is restarted.

Then, in step S08, the process is changed over and the process is repeated from step S01. Since there is no need to cool the half ring 2 and measure the color, time loss during changeovers is minimized.

-Example-
Prepare three half rings A, B, and C that are dirty and at high temperature (for example, 160°C) after being pressed with a press machine, and measure each of the three locations X, Y, and Z using the colorimeter 1. The color was measured and the color difference from the reference color was calculated. The results are shown in FIG.

As can be seen from FIG. 5, it was found that dirt could be detected quantitatively, although there were variations depending on the measurement location even for the same mold.

As in this case, if the color difference is greater than the predetermined value of 12 in at least one location, it is determined that dirt has adhered, and cleaning may be performed.

In this embodiment, by inserting and fixing the detection part 1c of the colorimeter 1 into the colorimeter housing part 11, the first guide surface 14 and the detection part 1c are separated by a predetermined distance. Even with the colorimeter 1, it is possible to measure the color of a high temperature object. In addition, since the first guide surface 14 is curved to match the colorimetric surface of the object to be measured, stable measurement can be performed with the first guide surface 14 in contact with the curved surface of the object to be measured. Color becomes possible. Then, measure the color of the color measurement surface of a clean reference product in advance, compare the measured value with the measurement value of the dirty color measurement object, and if the color difference is larger than a predetermined value, It can be determined that this is occurring. In this way, dirt can be easily quantified and detected, so dirt can be detected more reliably than by visual inspection.

In addition, in this embodiment, not only the first guide surface 14 but also the second guide surface 15 can be moved while in contact with the object to be measured, and color measurement can be performed at multiple locations, so that stains can be reliably detected over a wide range. It becomes possible.

In this embodiment, color measurement can be performed with the magnet 16 of the second guide surface 15 adsorbed to the side surface of the object to be measured made of a magnetic material, so that more stable measured values can be obtained.

In this embodiment, by attaching the colorimeter guide 10 to the detection part 1c of the colorimeter 1, it is possible to secure a distance from the colorimetric surface of the object to be measured, even when using a high-temperature mold. Color measurement becomes possible. Therefore, there is no need to stop the press for a long time.

In this embodiment, stains can be detected reliably by quantifying them based on the size of the color difference from a standard value, so compared to the case where stains are detected visually, the omission of stain detection is reduced and the quality of the product is improved.

Therefore, according to the colorimeter guide 10 according to the present embodiment, by attaching the colorimeter guide 10 to the detection part 1c of the colorimeter 1, even a curved and high temperature object to be measured can be measured. Can be colored.

(Other embodiments)
The present invention may have the following configuration for the above embodiment.

That is, in the above embodiment, the application software of the colorimeter 1 is installed on a mobile communication terminal such as a smartphone, and communication is established between this mobile communication terminal and the colorimeter 1. However, the present invention is not limited to this. Instead, data may be exchanged using wires or storage media. Alternatively, application software may be installed on a computer such as a PC, and data may be stored on a server.

Although the above embodiment has been described using an example of the colorimeter 1, the colorimeter is not limited to this colorimeter 1, and may be a colorimeter of a different type or method. In short, it is particularly applicable to any type of device that measures color by bringing the tip of the detection section into close contact with the surface to be measured.

Note that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications, or uses.

1 Colorimeter
1a Colorimeter body
1b Tip
1c Detection part
1d opening
2 Halfling
10 Colorimeter guide
11 Colorimeter housing section
11a Bottom
12 Guide body
13 Detection through hole
14 First guide surface
15 Second guide surface
16 Magnet
h Colorimetric distance

Claims (4)

a preparation step of inserting the detection part of the colorimeter into a colorimeter accommodating part provided in the guide body of the colorimeter guide and having a detection through hole to fix the colorimeter;
The curved first guide surface of the guide body is brought into contact with the curved surface to be measured of a clean reference product to ensure a colorimetric distance between the surface to be measured of the reference product and the detection unit. a reference color storage step of measuring the colorimetric surface of the reference product in a state in which the color is measured and storing the reference value;
The curved first guide surface of the guide body is brought into contact with the curved colorimetric surface of the colorimetric object, and the colorimetric distance is set between the colorimetric surface of the colorimetric object and the detection unit. a colorimetric step of measuring the colorimetric surface of the colorimetric object while ensuring that
a determination step of comparing the colorimetric value stored in the reference color storage step with the colorimetric value in the colorimetry step, and determining that stain has occurred when the color difference is larger than a predetermined value ;
Colorimetry is performed at multiple locations by moving a first guide surface provided on the guide body and a second guide surface substantially perpendicular to the first guide surface while making contact with the object to be measured.
A method for detecting dirt using a colorimeter, characterized by: 2. The method according to claim 1 , wherein the colorimetric surface of the colorimetric object is measured while the magnet provided on the second guide surface is attracted to the side surface of the colorimetric object made of a magnetic material. How to detect dirt. 3. The color measurement method according to claim 1, wherein after the mold is taken out from the press, the first guide surface is brought into contact with the surface to be measured of color of the mold without cooling. How to detect dirt. After measuring the color of the mold, if the color difference between the measured value and the reference value is greater than or equal to a predetermined value, the mold is cleaned and then reincorporated into the press machine. Detection method.