Method for manufacturing detergency evaluation test piece for blast cleaning device and method for evaluating detergency of blast cleaning device

Abstract

To provide a method for manufacturing a detergency evaluation test piece used for detergency evaluation of a blast cleaning device and a detergency evaluation method according to which a uniform coating film can be formed, variation does not occur in criterion for evaluation and evaluation result, detergency can be evaluated stably and correctly.SOLUTION: According to a method for manufacturing a detergency evaluation test piece 1 used for detergency evaluation of a blast cleaning device which cleans a surface of a cleaned object by injecting a shot material toward the cleaned object, after a coating material 11A is dropped onto a surface of a base material 10 with a smooth surface 10a, the base material 10 is rotated in a plane direction to diffuse the coating material 11A in the surface 10a, and then, the coating material 11A is dried to form a coating film 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for preparing a test piece for evaluating the cleaning power of a blast cleaning device and a method for evaluating the cleaning power of a blast cleaning device. [Background technology]

[0002] Conventionally, for the purpose of effectively cleaning objects to be cleaned, such as machine parts such as gears and chains, or molds, blast cleaning devices have been proposed for spraying blasting materials such as dry ice onto the objects to be cleaned (see, for example, Patent Document 1).

[0003] In addition, as a method for evaluating the cleaning power of the above-mentioned blast cleaning equipment, for example, a test piece is prepared by applying ink to the surface of a glass plate with an oil-based pen, and blast material is sprayed from the blast cleaning equipment toward this test piece, and the presence or absence of peeling of the ink coating on the surface of the test piece is confirmed and used as an evaluation index. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-148446 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when preparing test pieces using the above-mentioned method, there is a problem in that it is difficult to apply the ink evenly when applying ink to a glass plate or the like using an oil-based pen, due to differences in skill depending on the level of proficiency of the operator.

[0006] In addition, even if the thickness of the ink coating film on the surface of the prepared test piece is uniform, when a plurality of test pieces are prepared, it is inevitable that the thickness of the coating film will vary among the test pieces. Therefore, when evaluating the cleaning power of a plurality of blast cleaning devices, it is difficult to evaluate them under the same conditions, and there is a problem that it is impossible to compare the strength of the cleaning power among the devices.

[0007] The present invention has been made in consideration of the above problems, and aims to provide a method for preparing a cleaning power evaluation test piece used for evaluating the cleaning power of a blast cleaning device, which can form a uniform coating film and enable stable and accurate evaluation of cleaning power without variation in evaluation criteria or evaluation results, and a method for evaluating the cleaning power of a blast cleaning device. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention includes the following aspects. [1] A method for preparing a cleaning power evaluation test piece to be used for evaluating the cleaning power of a blast cleaning device that cleans the surface of an object to be cleaned by spraying shot material toward the object, comprising: A method for preparing a cleaning power evaluation test piece for use in evaluating the cleaning power of a blast cleaning device, comprising the steps of: dripping paint onto a surface of a smooth substrate; rotating the substrate in a planar direction to diffuse the paint within the plane of the surface; and then drying the paint to form a coating film. [2] A method for preparing a test piece for evaluating cleaning power used in evaluating the cleaning power of the blast cleaning device described in [1] above, characterized in that the rotation speed of the base material is 4000 rpm or less. [3] A method for preparing a test piece for evaluating cleaning power used in evaluating the cleaning power of the blast cleaning device described in [1] or [2] above, characterized in that the paint is dropped onto the surface of the substrate and the substrate is rotated while the ambient temperature is in the range of 10 to 35°C and the ambient humidity is 40 to 70%. [4] A method for preparing a test piece for evaluating cleaning power used in evaluating the cleaning power of the blast cleaning device described in [3] above, characterized in that the amount of the paint dripped onto the surface of the substrate, the rotation speed of the substrate, the atmospheric temperature, and the atmospheric humidity are adjusted so that the coating film has a thickness after drying in the range of 0.5 to 100 μm. [5] A method for preparing a test piece for evaluating cleaning power used in evaluating the cleaning power of the blast cleaning device described in [1] or [2] above, characterized in that the substrate is a flat plate made of any one of a glass plate, a metal plate, and a resin plate. [6] A method for evaluating the cleaning power of a blast cleaning device, comprising: evaluating the cleaning power of the blast cleaning device using a cleaning power evaluation test piece prepared by the method described in [1] or [2] above. Effect of the Invention

[0009] According to the method for preparing a cleaning power evaluation test piece used for evaluating the cleaning power of a blast cleaning device according to the present invention, as described above, a method is adopted in which paint is dropped onto the surface of a substrate, the substrate is rotated in a planar direction to spread the paint within the surface, and the paint is then dried to form a coating film. This allows the paint to be uniformly spread on the surface of the substrate, and a coating film can be formed while controlling the film thickness after drying uniformly. Therefore, even when evaluating the cleaning power of a plurality of different blast cleaning devices, for example, a cleaning power evaluation test piece that allows stable and accurate evaluation of the cleaning power can be obtained without variations in the evaluation criteria and evaluation results.

[0010] Furthermore, according to the cleaning power evaluation method of the present invention, the cleaning power of a blast cleaning device is evaluated using a cleaning power evaluation test piece obtained by the above-mentioned manufacturing method of the present invention. Therefore, as with the above, even when evaluating the cleaning power of multiple different blast cleaning devices, it is possible to stably and accurately evaluate the cleaning power without variation in the evaluation criteria or evaluation results. [Brief description of the drawings]

[0011] [Figure 1]FIG. 2 is a diagram for illustrating a method for producing a test piece for evaluating the cleaning power of a blast cleaning device according to one embodiment of the present invention, and is a flow chart and process diagram showing each step for producing the test piece for evaluating the cleaning power. [Diagram 2] FIG. 1 is a diagram for illustrating a method for evaluating the cleaning power of a blast cleaning device according to one embodiment of the present invention, and is a graph showing the relationship between the thickness of a coating film formed on a substrate and the cleaning time required to remove a coating film of this thickness. [Diagram 3] FIG. 1 is a diagram for illustrating a method for preparing a test piece for evaluating the cleaning power of a blast cleaning device according to one embodiment of the present invention; and FIG. 2 is a graph showing the relationship between the thickness of a coating film obtained by drying after a paint is dropped onto a substrate and spread thereon, and the rotation speed of the substrate. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, a method for preparing a test piece for evaluating the cleaning power of a blast cleaning device, which is an embodiment of the present invention, and a method for evaluating the cleaning power of a blast cleaning device will be described with reference to Figures 1 to 3. Note that the drawings used in the following description may show characteristic parts in an enlarged scale for the sake of convenience in order to make the characteristics easier to understand, and the dimensional ratios of each component may not necessarily be the same as in reality. In addition, the materials exemplified in the following description are merely examples, and the present invention is not limited to them, and can be appropriately modified and implemented within the scope of the present invention.

[0013] The cleaning power evaluation test piece obtained by the method for producing a cleaning power evaluation test piece according to the present invention is used, for example, in evaluating the cleaning power of a so-called blast cleaning device, which cleans the surface of an object to be cleaned, such as a mechanical part such as a gear or a chain, or a mold, by spraying shot material at the object to be cleaned. In addition, the method for evaluating the cleaning power of a blast cleaning device according to the present invention is a method for evaluating the cleaning power of a blast cleaning device by using a cleaning power evaluation test piece obtained by the method for producing a cleaning power evaluation test piece according to the present invention.

[0014] <How to prepare test pieces to evaluate the cleaning power of blast cleaning equipment> A method for producing a test piece for evaluating the cleaning power of the blast cleaning device of this embodiment will be described with reference to the drawings.

[0015] FIG. 1 is a flowchart and a process diagram showing each step for producing a test piece for evaluating cleaning power (hereinafter, may be simply referred to as a test piece) 1 by applying a method for producing a test piece for evaluating cleaning power of a blast cleaning device of this embodiment (hereinafter, may be simply referred to as a "production method"). FIG. 2 is a graph showing the relationship between the film thickness of a coating film 11 formed on a substrate 10 and the cleaning time required to remove a coating film 11 of this thickness, when the cleaning power evaluation method for a blast cleaning device of this embodiment (hereinafter sometimes simply referred to as the "evaluation method") is applied to evaluate the cleaning power of the blast cleaning device. FIG. 3 is a graph showing the relationship between the film thickness of the coating film 11 obtained by spreading and drying the paint 11A dropped onto the substrate 10 and the rotation speed of the substrate 10 when the test piece 1 is produced by applying the production method of this embodiment.

[0016] The preparation method of this embodiment is a method for preparing a cleaning power evaluation test piece 1 used for evaluating the cleaning power of a blast cleaning device that cleans the surface of an object to be cleaned by spraying shot material toward the object to be cleaned. In a test for evaluating the cleaning power of a blast cleaning device, the degree of peeling / removal of a coating film 11 formed on the surface of the test piece 1 when blast material is sprayed toward the test piece 1 is used as an evaluation index (see also the graph in FIG. 2).

[0017] In the production method of this embodiment, paint 11A is dripped onto the surface of substrate 10 having smooth surface 10a, and then substrate 10 is rotated in a planar direction to diffuse paint 11A within the surface 10a. Paint 11A is then dried to form coating film 11, thereby obtaining test piece 1.

[0018] As shown in the example in FIG. 1, the method for producing a test piece described in this embodiment can be, for example, a method including at least the following steps (1) to (4). Step (1): "Fixing the substrate 10" The disk-shaped substrate 10 is fixed on the turntable 52 of the test piece preparation device 5 so that the surface 10a, on which the coating film 11 is formed, faces upward. Step (2): "Dripping paint 11A" An appropriate amount of paint 11A is dropped onto a surface 10a of a substrate 10 fixed on a turntable 52. Step (3): "Rotating the substrate 10 and spreading the paint 11A" The substrate 10 fixed on the turntable 52 is rotated in a planar direction, and the paint 11A dropped onto the surface 10a is spread within the plane of the surface 10a. Step (4): "Drying paint 11A" The coating material 11A spread so as to cover the surface 10a of the substrate 10 is allowed to dry naturally, and the test piece 1 is obtained.

[0019] [Equipment for preparing test pieces for evaluating cleaning power] In this embodiment, an example of an apparatus used for producing the test piece 1 is a test piece producing apparatus 5 shown in a process diagram corresponding to a flow chart showing each process in FIG. The test piece preparation device 5 shown in FIG. 1 is roughly configured to include a main body section 51, a turntable 52, and a pipette section 53.

[0020] The main body 51 accommodates therein a motor (not shown) for rotating the turntable 52, a control base for driving the motor, and the like. In the illustrated example, the main body 51 is made up of a roughly box-shaped case, and is provided with a drive shaft 51a for transmitting a rotational force from a motor to a turntable 52 so as to protrude from the upper surface side. Further, the main body 51 in the illustrated example is provided with an adjustment knob 51b for adjusting the rotation speed of the turntable 52 by controlling the rotation speed of the motor.

[0021] As described above, the turntable 52 rotates by transmitting a rotational force from a motor (not shown) housed inside the main body 51 via the drive shaft 51a, thereby rotating the substrate 10 in a planar direction, and in the illustrated example, is configured in a circular plate shape.

[0022] 1, the turntable 52 includes a fixing mechanism for fixing the substrate 10 on the upper surface 52a. Such a fixing mechanism is not particularly limited, but may be, for example, a general vacuum chucking mechanism or an adsorption plate, or a structure in which a recess capable of receiving and supporting the vicinity of the outer edge of the substrate 10 is provided on the outer periphery of the turntable 52.

[0023] The pipette unit 53 drips the paint 11 A onto the surface 10 a of the substrate 10 fixed on the turntable 52 . Although detailed illustration is omitted, it is preferable to use, as the pipette portion 53, for example, a commercially available push-button type liquid microvolume meter, from the viewpoint of enabling accurate adjustment of the amount of paint 11A dispensed.

[0024] [Process (1)] In step (1), as described above, the disk-shaped substrate 10 is fixed on the turntable 52 of the test piece preparation device 5 so that the surface 10a, on which the coating film 11 is formed, faces upward. At this time, the substrate 10 is fixed on the upper surface 52a by a fixing mechanism (not shown) provided on the turntable 52.

[0025] The substrate 10 is not particularly limited, but may be, for example, a flat plate made of a glass plate or a metal plate. The shape of the substrate 10 is not particularly limited, and in addition to the disk shape shown in the figure, a substrate having a square shape in plan view may also be used. On the other hand, in order to uniformly spread the paint 11A dropped on the surface 10a by rotating the substrate 10, it is preferable that the substrate 10 has a circular shape in plan view.

[0026] Furthermore, the thickness and planar dimensions of the substrate 10 are not particularly limited, and it is sufficient that the thickness is set to ensure sufficient strength as a test piece for evaluating the cleaning power of the blast cleaning device, and that the planar dimensions are set to be sufficient to allow accurate evaluation tests.

[0027] [Process (2)] In step (2), a pipette unit 53 provided in the test piece preparation device 5 is used to drip an appropriate amount of paint 11A onto the surface 10a of the substrate 10 fixed on the turntable 52. At this time, by using the pipette unit 53 consisting of a push-button type liquid microvolume meter, it becomes possible to finely adjust the amount of paint 11A to be applied. Also, in step (2), paint 11A is dripped near the center of the substrate 10 in a plan view, taking into consideration that paint 11A will be uniformly spread on the surface 10a by the rotation of the substrate 10 in step (3).

[0028] In addition, in step (2), the amount of coating material 11A dropped onto surface 10a of substrate 10 is preferably optimized in accordance with the conditions of the rotation speed of substrate 10, the atmospheric temperature, and the atmospheric humidity so that the thickness of coating film 11 after drying, which will be described in detail later, falls within the range of 0.5 to 100 μm. Moreover, as the paint 11A, for example, a water-based paint or an oil-based paint can be used.

[0029] [Process (3)] In step (3), as described above, the substrate 10 fixed on the turntable 52 of the test piece preparation device 5 is rotated in a planar direction, and the paint 11A dropped onto the surface 10a is spread within the plane of the surface 10a. At this time, as shown in Fig. 1, the centrifugal force caused by the rotation of the substrate 10 causes the paint 11A to be spread uniformly so as to cover the entire surface 10a of the substrate 10. Also, in step (3), surplus paint 11A present on the surface 10a of the substrate 10 is discharged to the outside of the substrate 10 by the centrifugal force caused by the rotation of the substrate 10.

[0030] The number of rotations (rotation speed) of the substrate 10 in step (3) is not particularly limited, and can be set arbitrarily while taking into consideration the thickness of the coating film 11 to be formed and the properties of the paint 11A. The number of rotations of the substrate 10 is preferably, for example, 4000 rpm or less from the viewpoint of ensuring the adhesion thickness of the paint 11A on the surface 10a, i.e., the thickness of the coating film 11 after drying. The lower limit of the number of rotations of the substrate 10 is also not particularly limited, but is preferably 500 rpm or more from the viewpoint of uniformly diffusing the paint 11A on the surface 10a of the substrate 10.

[0031] The rotation time of the substrate 10 in step (3) is not particularly limited either, and as with the rotation speed described above, may be set arbitrarily taking into consideration the thickness of the coating film 11 to be formed and the properties of the paint 11A, and may be set, for example, in the range of 1 to 10 seconds.

[0032] In step (3), the atmospheric temperature and atmospheric humidity when the coating material 11A is spread on the surface 10a of the substrate 10 are not particularly limited, but it is preferable to adjust the atmospheric temperature to a range of 10 to 35°C and the atmospheric humidity to 40 to 70%, for example. In step (3), it is preferable to adjust the atmospheric temperature to about 25°C and the atmospheric humidity to a range of 50 to 60%. In the production method of this embodiment, it is preferable that the substrate 10, the paint 11A, and the turntable 52 of the test piece production device 5 are all at approximately the same temperature.

[0033] [Process (4)] In step (4), the rotation of the turntable 52 is stopped to stop the rotation of the substrate 10, and then the paint 11A that has been spread to cover the surface 10a of the substrate 10 as described above is allowed to dry naturally, thereby obtaining a test piece 1.

[0034] The drying conditions for the paint 11A are preferably room temperature, taking into consideration the quality of the coating film after drying. For example, drying is preferably performed under conditions of an ambient temperature of about 25° C. and an ambient humidity of 50 to 60%.

[0035] [Adjusting the coating thickness] In this embodiment, as described in the explanation of step (2), it is preferable to comprehensively optimize each of the above conditions by adjusting the amount of coating material 11A dropped onto surface 10a of substrate 10, the rotation speed of substrate 10, the atmospheric temperature, and the atmospheric humidity so that the film thickness of coating film 11 after drying is in the range of 0.5 to 100 μm.

[0036] More specifically, for example, by setting the rotation speed of the substrate 10 in step (3) to 500, 1000, 1500, or 2000 rpm, and adjusting the rotation time in the range of 1 to 10 seconds, the film thickness of the paint 11A (coating film 11) spread on the surface 10a of the substrate 10 can be adjusted to a range of approximately 0.5 to 100 μm. As described above, different conditions must be selected for the atmospheric temperature and atmospheric humidity depending on the properties of the paint 11A, but by adjusting the atmospheric temperature to approximately 25° C. and the atmospheric humidity to approximately 50%, it is possible to make the film thickness of the coating film 11 after drying in step (4) uniform.

[0037] The graph in Figure 3 shows the relationship between the film thickness of paint 11A dropped onto surface 10a of substrate 10 in step (2), which is then spread over surface 10a of substrate 10 in step (3), and dried to form coating film 11 in step (4), and the rotation speed of substrate 10. As shown in the graph of FIG. 3, the thickness of the coating film 11 tends to become thinner as the rotation speed of the substrate 10 increases, so it is preferable to select the required film thickness of the coating film 11 after drying and set the rotation speed based on the relationship shown in this graph.

[0038] <Method for evaluating the cleaning power of blast cleaning equipment> The method for evaluating the cleaning power of the blast cleaning device of this embodiment will be described with reference to the same drawings as those for the description of the test piece 1 for evaluating cleaning power of this embodiment described above, as necessary.

[0039] The evaluation method of this embodiment is a method for evaluating the detergency of a blast cleaning device by using the detergency evaluation test piece 1 produced by the production method of this embodiment described above.

[0040] One method for evaluating the cleaning power of a blast cleaning device is to spray blast material onto a test piece 1 prepared by the method described above under the same conditions as when actually cleaning an object to be cleaned, and compare the time required to remove the coating film 11 formed on the surface of the test piece 1.

[0041] As shown in the graph of FIG. 2, the thicker the coating film 11 is, the longer the time required to remove the coating film 11 from the substrate 10 becomes. On the other hand, for example, if the cleaning power of the blasting device is weak, the time required to remove the coating film 11 on the substrate 10 also becomes long. In other words, by evaluating the cleaning power of multiple blast cleaning devices using test pieces 1 with the same specifications, it is possible to evaluate a blast cleaning device that requires a shorter time to remove the coating film 11 as having a higher cleaning power.

[0042] <Action and effect> As described above, according to the method for producing the cleaning power evaluation test piece 1 used for evaluating the cleaning power of the blast cleaning device of this embodiment, the method is adopted in which the paint 11A is dropped onto the surface 10a of the substrate 10, the substrate 10 is rotated in a planar direction to spread the paint 11A within the surface 10a, and then the paint 11A is dried to form the coating film 11. As a result, the paint 11A is uniformly spread on the surface 10a of the substrate 10, and the coating film 11 can be formed while controlling the film thickness after drying uniformly. Therefore, for example, even when the cleaning power of a plurality of different blast cleaning devices is evaluated, a cleaning power evaluation test piece capable of stably and accurately evaluating the cleaning power can be obtained without variations in the evaluation criteria and evaluation results.

[0043] Furthermore, according to the method for evaluating the cleaning power of a blast cleaning device of this embodiment, the cleaning power of the blast cleaning device is evaluated using a cleaning power evaluation test piece obtained by the manufacturing method of this embodiment described above. Therefore, as with the above, even when evaluating the cleaning power of multiple different blast cleaning devices, it is possible to stably and accurately evaluate the cleaning power without variation in the evaluation criteria or evaluation results.

[0044] <Other forms> Although an example of a method for preparing a test piece for evaluating the cleaning power of a blast cleaning device according to the present invention and a method for evaluating the cleaning power of a blast cleaning device have been described above, the present invention is not limited to the above-mentioned embodiment. Each of the configurations and their combinations in the above-mentioned embodiment are merely examples, and addition, omission, substitution, and other modifications of the configurations are possible within the scope of the gist of the present invention. [Industrial Applicability]

[0045] The method for producing a test piece for evaluating the cleaning power of a blast cleaning device of the present invention is capable of forming a uniform coating film, and is capable of obtaining a test piece for evaluating the cleaning power stably and accurately without causing variations in the evaluation criteria and evaluation results. Therefore, the test piece obtained by the production method of the present invention is very suitable for use in evaluating the cleaning power of a blast cleaning device for cleaning machine parts such as gears and chains, or objects to be cleaned such as molds. [Explanation of symbols]

[0046] 1... Detergency evaluation test piece (test piece) 10...Base material 10a…Surface 11...Paint film 11A…Paint 5...Test piece preparation device 51...Main body 51a...Drive shaft 51b…Adjustment knob 52...Turntable 52a…Top surface 53...Pipette section

Claims

1. A method for preparing a cleaning power evaluation test piece used in evaluating the cleaning power of a blast cleaning device that cleans a surface of an object to be cleaned by spraying shot material toward the object, comprising: A method for preparing a cleaning power evaluation test piece for use in evaluating the cleaning power of a blast cleaning device, comprising the steps of: dripping paint onto a surface of a smooth substrate; rotating the substrate in a planar direction to diffuse the paint within the plane of the surface; and then drying the paint to form a coating film.

2. 2. The method for producing a test piece for evaluating cleaning power used in evaluating the cleaning power of the blast cleaning device according to claim 1, wherein the rotation speed of the base material is 4000 rpm or less.

3. 3. A method for preparing a cleaning power evaluation test piece used for evaluating the cleaning power of the blast cleaning device according to claim 1 or 2, characterized in that the paint is dropped onto the surface of the base material and the base material is rotated while the ambient temperature is in the range of 10 to 35° C. and the ambient humidity is in the range of 40 to 70%.

4. The method for producing a cleaning power evaluation test piece used in evaluating the cleaning power of the blast cleaning device described in claim 3, characterized in that the amount of the paint dripped onto the surface of the substrate, the rotation speed of the substrate, the atmospheric temperature, and the atmospheric humidity are adjusted so that the coating film has a thickness after drying in the range of 0.5 to 100 μm.

5. 3. A method for preparing a cleaning power evaluation test piece used for evaluating the cleaning power of a blast cleaning device according to claim 1 or 2, characterized in that the substrate is a flat plate made of any one of a glass plate, a metal plate and a resin plate.

6. A method for evaluating the cleaning power of a blast cleaning device, comprising: evaluating the cleaning power of the blast cleaning device by using a test piece for evaluating cleaning power produced by the method according to claim 1 or 2.

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