JP2010237071A - Coating evaluation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a revolutionary coating evaluation device exhibiting unconventional operation and effect. <P>SOLUTION: The coating evaluation device evaluates characteristics of the surface coating of a specimen 1 such as a metallic material and a synthetic resin material. The coating evaluation device includes: an injection part 5 injecting an injection material 4 in which an abrasive grain 3 is mixed to liquid 2 to the specimen 1 together with compressed air, and reducing the specimen 1; an injection material storage part 6 for storing a predetermined amount of the injection material 4 supplied to the injection section 5; and an injection material recovering part 7, different from the injection material storage part 6, recovering the injection material 4 injected from the injection part 5. The injection material 4 recovered by the injection material recovering part 7 is sent out to the injection material storage part 6 by the injection material sending-out means 10, and is repeatedly injected in a predetermined amount of the injection material 4 to the specimen 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a film evaluation apparatus.

  For metal products and synthetic resin products, surface modification such as surface strength improvement, wear resistance improvement or corrosion resistance improvement, for example, plating, coating, diffusion penetration, vapor deposition or thermal spraying on the surface of parts A technique for providing a coating by the above has been proposed.

  By the way, since this film is originally provided for the purpose of improving the strength, it is rubbed or corroded to cause chemical properties such as actual film thickness, strength or wear properties such as mechanical properties and corrosion resistance. It is difficult to evaluate the characteristics.

  For example, a blast erosion method has been proposed as a method for evaluating (measuring) the characteristics of this film.

  This blast erosion method measures the weight loss per unit time of the subject by spraying abrasive grains with the compressed air on the subject, and obtains the volume loss by dividing the weight loss by the bulk specific gravity of the film. In this case, the unit time and the volume loss are in a proportional relationship represented by a straight line graph, and the slope of this straight line (called erosion characteristics) has a good correspondence with the tensile strength, elongation, hardness or fracture toughness value. Therefore, the measurement of the weight loss has a merit that a difficult-to-evaluate film can be easily evaluated in a short time.

  However, with this blast erosion method, the abrasive grains are likely to be scattered, so that the abrasive grains that can be handled have a diameter of several hundreds of micrometers or more, and the characteristics of a thin film of several tens of micrometers or less formed by vapor deposition or sputtering are used. There is a problem that it cannot be evaluated.

  Furthermore, since the apparatus used for the blasting erosion method is easy for the abrasive grains and the abrasive grains of the subject to fly in the air, the airtightness of the injection chamber prevents the abrasive grains from leaking out of the injection chamber. In addition, it is necessary to install a dust collection filter or a cyclone for collecting abrasive grains and the like, and there is a problem that the entire apparatus becomes large, complicated and expensive.

  In addition, since the abrasive grains continue to dance for a while after the injection material is injected, if the injection chamber is opened and the subject is taken out after the injection material is injected, the abrasive grains may be scattered outside. Accordingly, when the subject is taken out after the injection material is injected, there is a problem that it takes a long time for one measurement because it is necessary to wait until the abrasive grains floating in the injection chamber are completely removed.

  In addition, in the method of mixing abrasive grains in the compressed air, the impact force that the abrasive grains collide with the subject depends on the humidity, and the higher the humidity, the larger the error. There is also a problem that a constant humidity must be set every time, and the test operation is extremely complicated and troublesome.

  Therefore, the present applicant has proposed a film evaluation apparatus (hereinafter, a conventional example) disclosed in Japanese Patent No. 3356415 that solves the above-described problems.

  This conventional example is a structure that reduces the amount of the subject by injecting the spray material, in which abrasive grains are mixed into the liquid, with the compressed air at a high speed to collide with the surface of the subject, and the abrasive grains are in the air. Can be used even with small abrasive grains of several tens of μm or less, and even a thin film of several tens of μm or less can be gradually reduced in weight to evaluate characteristics. In addition, when the spray material mixed with abrasive grains in the liquid and the compressed air are sprayed onto the subject together, the subject's coating can be reduced in a short time and is not affected by moisture, etc. It is easy to perform, and there are few measurement errors and reproducibility is also good.

Japanese Patent No. 3356415

  By the way, the conventional example measures the causal relationship between the weight loss of the subject and the time required for the weight loss, and the characteristics of the film formed on the surface of the test subject, and the adhesion between the film and the base material It is based on the premise that the concentration of the propellant injected to the subject is always constant, and maintaining the concentration of this propellant constant It is extremely difficult in terms of technology, and the current situation is that the accuracy is lowered in actual evaluation (evaluation varies).

  The present applicant has advanced further research and development on the above-described film evaluation apparatus, and as a result, has developed an innovative film evaluation apparatus that exhibits unprecedented effects.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A film evaluation apparatus for evaluating the characteristics of a surface film of a subject 1 such as a metal material or a synthetic resin material, wherein a spray material 4 in which abrasive particles 3 are mixed in a liquid 2 is sprayed together with compressed air on the subject 1. The injection unit 5 for reducing the amount of the subject 1, the injection material storage unit 6 for storing the predetermined amount of the injection material 4 supplied to the injection unit 5, and the injection material 4 injected from the injection unit 5 The injection material storage unit 6 and a separate injection material recovery unit 7 are provided, and the injection material 4 recovered by the injection material recovery unit 7 is transferred to the injection material storage unit 6 by the injection material delivery means 10. It is comprised so that it may be sent out, and it concerns on the film | membrane evaluation apparatus characterized by being comprised so that injection of the predetermined amount of the said injection material 4 with respect to the said test subject 1 can be performed repeatedly.

  The film evaluation apparatus according to claim 1, wherein the opening shape of the nozzle 8 for injecting the injection material 4 in the injection unit 5 is a square of 1 mm or less × 1 mm or less. Is.

  The film evaluation apparatus according to claim 1, wherein the opening shape of the nozzle 8 for injecting the injection material 4 in the injection unit 5 is a square of 1 mm x 1 mm. is there.

  The film evaluation apparatus according to any one of claims 1 to 3, wherein an abrasive grain 3 having an average particle diameter of 5 µm or less is employed as the abrasive grain 3 contained in the spray material 4. This relates to the evaluation device.

  5. The film evaluation apparatus according to claim 1, wherein the injection unit 5 is configured such that the injection material 4 is supplied from the injection material storage unit 6 via the injection material supply means 11. The spray material supply means 11 relates to a film evaluation apparatus characterized in that the spray material 4 is discharged and supplied to the spray unit 5 by pressurizing the spray material storage unit 6. is there.

  Since the present invention is configured as described above, an unprecedented method for evaluating a film is possible. That is, unlike the conventional example in which an indirect amount of time is brought into the evaluation, the direct amount of abrasive grains is targeted for evaluation. Therefore, it is an epoch-making film evaluation apparatus that exhibits unprecedented functions and effects, such as being expected to contribute to the standardization of film evaluation.

It is explanatory sectional drawing of the principal part which concerns on a present Example. It is explanatory drawing of the principal part which concerns on a present Example. It is explanatory drawing of the principal part which concerns on a present Example. It is schematic operation explanatory drawing of a present Example. It is schematic operation explanatory drawing of a present Example. It is schematic operation explanatory drawing of a present Example. It is schematic operation explanatory drawing of a present Example. It is explanatory drawing of the principal part which concerns on a present Example. It is a formula in a film evaluation test performed using this example. It is a graph which shows the result of the film | membrane evaluation test of a present Example. It is a graph which shows the result of the film | membrane evaluation test of a present Example. It is a graph which shows the result of the measuring method of the film by glow discharge emission spectroscopic analysis (GD-OES).

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  A predetermined amount of the injection material 4 stored in the injection material storage unit 6 is supplied to the injection unit 5, and the injection material 4 is injected from the injection unit 5 together with the compressed air at a high speed and collides with the surface of the subject 1. The film on the surface of the body 1 is reduced. The injection material 4 injected from the injection unit 5 is recovered by the injection material recovery unit 7, and then the injection material 4 recovered by the injection material recovery unit 7 is supplied to the injection material storage unit 6 by the injection material delivery means 10. The propellant 4 sent out and sent to the propellant storage part 6 is supplied to the jet part 5 and used again for reducing the film.

  As described above, according to the present invention, it is possible to repeatedly inject a predetermined amount of the injection material 4 onto the subject 1, which makes it possible to evaluate the film using a new standard that has not been used so far. Accurate evaluation can be performed.

  Specifically, since the injection of the predetermined amount of the injection material 4 can be repeatedly performed, the time for injecting the injection material 4 to the subject 1, that is, the indirect amount is brought in as in the conventional example described above. First, since the evaluation is directed to a direct amount, that is, the amount of the abrasive grains 3 mixed in the injection material 4 to be collided with the subject 1, a highly accurate evaluation can be performed accordingly.

  That is, unlike the conventional example, the evaluation is based on the assumption that the concentration of the spray material 4 sprayed onto the subject 1 during a predetermined time is constant, and the spray material 4 (abrasive grains 3) that can be accurately identified. ), It is possible to make an accurate evaluation.

  The Applicant actually conducted repeated evaluations using this evaluation method, and confirmed that there was no variation in evaluation accuracy.

  In addition, the present invention is configured so that a predetermined amount of the injection material 4 can be reused, so that an efficient operation without wasting the abrasive grains 3 can be performed, and a reduction in cost can be achieved. A compact device can be achieved.

  Further, in the invention described in claim 3, since a predetermined amount of the injection material 4 (abrasive grain 3) is caused to collide with the unit area of the subject 1, it is not necessary to evaluate the wear range. (For example, in the case of a conventional nozzle having an opening of 3 mm × 3 mm, it is indispensable to specify a site of a unit area for evaluation.) In addition, it is possible to inject the subject 1 for a long time and is small. The evaluation of the subject 1 can be performed reliably, and no large power is required and less power is required, so the cost (manufacturing cost and running cost) is excellent, and the device itself is compact. Can also be achieved.

  A specific embodiment of the present invention will be described with reference to the drawings.

  The present embodiment is a film evaluation apparatus for measuring characteristics of a film formed on the surface of a subject 1 such as a metal material or a synthetic resin material, and includes a fixing mechanism 12 for fixing the subject 1 and the fixing mechanism. An injection unit 5 is provided for injecting the injection material 4 in which the abrasive grains 3 are mixed into the liquid 2 into the subject 1 fixed to 12 together with the compressed air to reduce the amount of the subject 1.

  As the abrasive grains 3, abrasive grains 3 made of alumina having an average particle diameter of 5 μm or less (actually an average particle diameter of 1.2 μm) are employed. Further, the abrasive grains 3 having a maximum particle diameter of 1 μm or less may be employed so that even a thin film having a thickness of several μm or less can be reduced with good reproducibility.

  The abrasive grains 3 are not limited to alumina, and fine particles such as synthetic resin, metal, ceramics, and glass may be employed. The abrasive grains 3 may be appropriately selected depending on the type of the film or the base material of the subject 1. For example, if the film or base material is a soft material, the use of hard abrasive grains will increase the error because the weight loss progresses faster. In the case of a hard material such as a coating, it is preferable to use a hard material such as alumina because soft abrasive particles take too much time to lose.

  Further, the abrasive grains 3 are dispersed in water 2 to form a slurry, which constitutes an injection material 4. In addition to water, depending on the purpose, for example, an aqueous solution such as an alkali or a solvent such as an alcohol may be used.

  As shown in FIG. 1, the injection unit 5 includes a nozzle 8 for injecting the injection material 4 and a mixing chamber 13 for injecting the injection material 4 together with the compressed air from the nozzle 8.

  As shown in FIGS. 2 and 3, the nozzle 8 is arranged in a processing chamber 15 provided on the upper surface of the mounting base 14 of the apparatus main body, and the opening shape of the opening 8a in the nozzle 8 is a square of 1 mm × 1 mm. Is set.

  Therefore, since a predetermined amount of the injection material 4 (abrasive grain 3) collides with the unit area of the subject 1, it is not necessary to evaluate the wear range (for example, an opening of 3 mm × 3 mm). In the case of the conventional nozzle having, it is indispensable to specify the site of the unit area for evaluation.) In addition, it is possible to inject the subject 1 for a long time and to reliably evaluate the small subject 1. In addition, since no large power is required and power with less energy consumption is required, the cost (manufacturing cost and running cost) is excellent, and further, the device itself can be made compact. Become.

  The opening shape of the nozzle 8 may be a square shape (square shape or rectangular shape) of 1 mm or less × 1 mm or less (for example, 0.5 mm × 0.5 mm), and the nozzle shape may be a circular shape having a predetermined diameter.

  Moreover, the mixing chamber 13 is provided in the upper part of the process chamber 15 as illustrated in FIG. 1, and includes a compressed air supply pipe 16 </ b> A extending from a compressed air supply source (not shown), and the injection material storage unit 6. Is connected to an injection material supply pipe 11 </ b> A related to the injection material supply means 11.

  Therefore, in the mixing chamber 13, the compressed air supplied from the compressed air supply source and the injection material 4 supplied from the injection material storage unit 6 are mixed and injected from the nozzle 8.

  As shown in FIG. 1, the propellant storage unit 6 is configured by suspending a case-like body on the lower surface of the installation base 14, and configured to store a predetermined amount of the propellant 4.

  Further, the injection material storage unit 6 is provided with an injection material supply means 11 for supplying the injection material 4 to the injection unit 5.

  As shown in FIG. 1, the injection material supply means 11 includes an end portion of the compressed air supply pipe 11B extending from the compressed air supply source described above and an end portion of the injection material supply pipe 11A as the injection material storage section 6. It is arranged inside.

  That is, the injection material supply means 11 supplies compressed air from the compressed air supply pipe 11B into the injection material storage unit 6 to pressurize the injection material storage unit 6, and the injection material in the injection material storage unit 6 4 is discharged from the injection material supply pipe 11A and supplied to the injection unit 5 (mixing chamber 13). By using this pressurized air pressurizing means, approximately 100% of the injection material 4 is supplied.

  Further, the injection material storage unit 6 is provided with a stirring mechanism 9.

  As shown in FIG. 1, the stirring mechanism 9 is configured by providing a stirring blade 9 c at the tip of a rotating shaft 9 b that is suspended from a motor portion 9 a provided on the upper surface of the installation base 14.

  Accordingly, the spray material 4 accumulated in the spray material storage unit 6 is agitated so that the water 2 and the abrasive grains 3 constituting the spray material 4 are maintained in a distributed state in which the concentration distribution is uniform and constant. .

  Further, the injection material 4 injected by the injection unit 5 is collected by an injection material collection unit 7 separate from the injection material storage unit 6.

  As shown in FIG. 1, the propellant collection unit 7 is configured by suspending a case-like body on the lower surface of the installation table 14 and configured to store a predetermined amount of the propellant 4.

  In addition, the injection material collecting unit 7 is provided with an injection material sending means 10 for sending the injection material 4 to the injection material storage unit 6.

  As shown in FIG. 1, the injection material delivery means 10 includes an end portion of a compressed air supply pipe 10 </ b> A extending from the above-described compressed air supply source, and an injection material in which a front end portion is disposed in the injection material storage unit 6. An end portion of the delivery pipe 10B is arranged in the injection material collection unit 7.

  Therefore, the injection material delivery means 10 supplies compressed air from the compressed air supply pipe 10A into the injection material recovery unit 7 to pressurize the injection material recovery unit 7, and the injection material in the injection material recovery unit 7 is supplied. 4 is discharged from the injection material delivery pipe 10B and delivered to the injection material storage unit 6. As in the case of the injection material supply means 11 described above, substantially 100% of the injection material 4 is delivered by using this compressed air pressurizing means.

  The injection material delivery means 10 is a so-called manual delivery means that is manually transferred, or an injection material by applying pressure from above to below by arranging the injection material storage unit 6 and the injection material recovery unit 7 vertically. The sending means for moving 4 can be used as appropriate.

  In addition, the injection material recovery unit 7 is provided with a stirring mechanism 9 as in the case of the injection material storage unit 6 described above.

  As shown in FIG. 1, the stirring mechanism 9 is configured by providing a stirring blade 9 c at the tip of a rotating shaft 9 b that is suspended from a motor portion 9 a provided on the installation base 14.

  Therefore, the injection material 4 accumulated in the injection material recovery unit 7 is agitated, and the water 2 and the abrasive grains 3 constituting the injection material 4 are kept in a distributed state in which the concentration distribution is uniform and constant. .

  The fixing mechanism 12 is provided with a placing portion 12a, and the subject 1 is placed and fixed by the placing portion 12a.

  The fixing mechanism 12 is provided with a rotation mechanism 17. The rotating mechanism 17 is provided with a rotating shaft 17a that allows the mounting portion 12a to freely rotate at the end of the mounting portion 12a, and a rotating device (not shown) provided in the apparatus main body, A subject facing the injection material 4 with respect to the injection material 4 injected from the injection unit 5 when the rotation shaft 17a is rotated by operating a rotation knob (not shown) provided at an appropriate position. It is comprised so that the angle of 1 surface can be changed.

  The rotation mechanism 17 is configured such that the rotation shaft 17a for rotating the mounting portion 12a and the test surface of the subject 1 mounted and fixed on the mounting portion 12a are substantially in a straight line. Further, even if the subject 1 is rotated, the injection movement distance of the injection material 4 injected to the subject 1 may be set so as not to change.

  Further, the rotation shaft 17a is provided so as to be movable in a direction away from the processing chamber 15, and the mounting portion 12a is attached to the processing chamber 15 and a measuring unit 19 described later provided on the side of the processing chamber 15. It is configured to reciprocate between the measurement chamber 19a. An open / close partition wall (shutter) (not shown) is provided between the processing chamber 15 and the measurement chamber 19a.

  As shown in FIG. 1, the measuring unit 19 is configured by arranging a measuring device 19b that measures the surface condition of the subject 1 above the measuring chamber 19a. In this embodiment, the measuring device 19b is used as the measuring device 19b. An optical sensor that measures the processing depth of the surface of the subject 1 is employed.

  The subject 1 disposed on the placement portion 12a is positioned at a position opposite to the measuring device 19b, and the surface of the subject 1 is measured. In this embodiment, a personal computer is connected to the measuring device 19b, data communication is performed, and the measured values are plotted on the graph each time, so that a film characteristic graph is automatically obtained.

  The sensor related to the measuring device 19a is not limited to an optical sensor, but may be an electromagnetic or ultrasonic non-contact displacement meter, a stylus displacement meter, an electromagnetic film thickness meter, or the like. Instead, any measurement means or measurement method that exhibits the characteristics of the present embodiment may be employed as appropriate, such as observation of the surface state of a multilayer film or the like using an image element such as a CCD.

  Further, the measurement device 19b is provided with a uniaxial drive mechanism, thereby enabling measurement of the roughness of the surface of the subject 1. Further, by attaching a drive mechanism in the XY directions to the measurement device 19b, the surface of the subject 1 can be measured. By performing XY multipoint measurement and processing with visualization software, the three-dimensional shape of the surface of the subject 1 can be known, and the hardness difference from the film substrate can be visually recognized for each film.

  As shown in FIG. 8, the data obtained by the injection unit 5 and the measurement unit 19 is processed by the data processing unit 20 provided in the apparatus main body, and the result processed by the data processing unit 20 is the apparatus. A result display output unit 21 provided in the main body outputs the result.

  Reference numeral 22 denotes an operation unit for operating the film evaluation apparatus according to the present embodiment.

  Hereinafter, a film evaluation method using the film evaluation apparatus according to the present embodiment will be described.

  The subject 1 is processed in advance into a predetermined shape (a shape that can be attached to and detached from the fixing mechanism 12), and after measuring the surface shape of the film of the subject 1, the subject 1 is fixed to the fixing mechanism 12. On the other hand, a predetermined amount of water 2 and abrasive grains 3 are placed as the spray material 4 in the spray material storage section 6. The amount of the abrasive grains 3 is appropriately set according to the material and contents to be evaluated.

  Subsequently, the test is started by operating the start button.

  A predetermined amount of the injection material 4 stored in the injection material storage unit 6 is supplied to the injection unit 5 via the injection material supply means 11, and the injection material 4 is injected at a high speed together with the compressed air from the injection unit 5 (nozzle 8). When the surface of the subject 1 is made to collide, the film formed on the surface of the subject 1 is reduced (see FIGS. 4, 5, and 6).

  During the test, the injection material 4 and the compressed air are injected together from the injection unit 5 toward the subject 1, and the surface (film or base material) of the subject 1 has water 2, abrasive grains 3, and compressed air. Is gradually worn and reduced by the synergistic effect. At this time, the injection material 4 is injected from the injection unit 5 and collides with the surface of the subject 1, and a part of the film or the base material is scraped off and falls to the injection material collection unit 7. The water 2 and the abrasive grains 3 constituting the spray material 4 are kept uniform so that the abrasive grains 3 are not precipitated by being stirred by the stirring mechanism 9 inside both the spray material storage unit 6 and the spray material recovery unit 7. And it is kept at a predetermined ratio concentration.

  Further, the injection material 4 is sent to the injection material storage unit 6 by the injection material delivery means 10 provided in the injection material recovery unit 7 (see FIG. 7), and the injection material 4 sent to the injection material storage unit 6 is It is supplied to the injection unit 5 through the injection material delivery means 10 and used again for reducing the film.

  When the injection unit 5 repeatedly injects a predetermined amount of the injection material 4 onto the subject 1 and the injection of the injection material 4 is completed, the measurement unit 19 measures the subject 1. Note that the injection of the injection material 4 in the injection unit 5 and the measurement of the subject 1 in the measurement unit 19 may be repeatedly performed (see a two-dot chain line in FIG. 8).

Specifically, the measurement of the subject 1 in the measurement unit 19 measures the surface shape of the film of the subject 1 to measure the maximum wear depth, and the abrasive grains 3 projected on the unit area (1 mm ² ). The relationship between the amount of wear and the depth of wear can be graphed, and it was necessary to reduce the amount of subject 1 (the amount of wear of subject 1) and to reduce the amount (it took to wear this amount of wear) An evaluation method for measuring the causal relationship with the amount of the abrasive grains 3 (an evaluation method for obtaining the wear rate represented by the equation of FIG. 9) is possible. In addition, the surface shape of the subject 1 may be evaluated.

  An example in the case where film evaluation is performed on the subject 1 in which a film is actually formed on the surface of the base material will be shown.

  In the graph shown in FIG. 10 (the vertical axis is the film wear depth and the horizontal axis is the projection amount of the abrasive grains 3), the film surface (position of the horizontal axis 0) to the depth position P1 is at a constant loose angle. Ascending slope becomes a steep angle from this depth position P1 to a deeper depth position P2, and ascending at a gentle angle from this depth position P2 to the inner surface of the film, which becomes a deeper depth position P3. It became a gradient.

  Further, in the graph shown in FIG. 11 (a graph in which the vertical axis represents the wear rate and the horizontal axis represents the film depth), a gentle upward slope is obtained from the outer surface of the film to a depth position P1 of about half, and further from this depth position P1. A steep ascending slope was obtained from the deep depth position P2, and a steep descending slope was formed from the depth position P2 to the inner surface of the film at a deeper depth position P3.

  From the graphs shown in FIG. 10 and FIG. 11, both are layers that are not easily worn from the surface of the coating to the depth position P1, and are layers that are easily worn from the depth position P1 to the depth position P2. It can be seen that the layer is hard to wear from the depth position P2 to the depth position P3.

  In other words, from this, there are a layer that is hard to wear and a layer that is easy to wear even within a very thin film layer of several μm from a nano level film. It became clear that it was possible to judge.

  Further, the depth position P4 shown in FIGS. 10 and 11 is the interface with the base material, but it is possible to determine the adhesion between the film and the base material by determining whether it is hard to wear or easy to wear. (If the wear rate at the interface with the base material is low, the adhesion between the coating and the base material is high).

  That is, it is possible to evaluate interface characteristics such as adhesion and adhesive strength between the surface film of the subject 1 and the base material, and when this surface film is a multilayer film, Interfacial properties such as adhesion and adhesive strength can be evaluated, and changes in the coating properties of the surface coating (multilayer coating or gradient coating) of the subject 1 can be continuously evaluated.

  Thus, according to the present Example, it was confirmed that the characteristics of the film having different wear rates (mechanical characteristics) depending on the depth from the surface and the interface characteristics between the film and the base material become clear.

  In addition, as an applied evaluation method using the present embodiment, it can be combined with the measurement of the film (method of measuring the composition of the film) by glow discharge optical emission spectrometry (GD-OES) shown in FIG. It is possible to evaluate the film from various angles, such as by evaluating the composition characteristics (composition distribution) that differ depending on the depth position of the film and the wear rate (mechanical characteristics) that can be understood from this example. become.

  In addition, the film evaluation of this example is expected to be applied in a wide range in the actual market.

  Specifically, for example, a film that is required to be hard from the outer surface side to the inner surface side, such as a blade, or an inner surface side may be soft if the outer surface side is hard, such as a spectacle lens. It is possible to evaluate whether or not the film is optimal for a product to be coated such as a film.

  In addition, it has been confirmed that the results of this experiment are extremely reproducible. By collecting data in advance, it is possible to easily evaluate and analyze and identify the characteristics of an unknown film. (For example, it is possible to investigate the influence of the coating on the base material or the thickness of the coating.)

  In addition, by performing the test by changing the projection angle of the spray material 4 with respect to the surface of the subject 1 by the rotation mechanism, the characteristic characteristic (angle dependency) for each film of each subject 1 can be easily and clearly defined. It was confirmed that it could be judged. That is, by collecting a lot of such sample data, the mechanical characteristics and chemical characteristics of each film can be easily determined by comparing the test data. It can be specified.

  Since the present embodiment is configured as described above, it is possible to repeatedly inject a predetermined amount of the injection material 4 onto the subject 1, and this enables an unprecedented method for evaluating a film, that is, indirect time. Unlike the conventional example that brings the amount into the evaluation, by using the direct amount of abrasive grains as the object of evaluation, it is expected that the accuracy will be dramatically improved, and thus contribute to the standardization of the film evaluation. .

  In addition, this example can easily evaluate the film characteristics even with a very thin film by a very simple operation procedure, and it is excellent in practicality with a small measurement error and excellent reproducibility. Become.

  In addition, the present embodiment is configured such that a predetermined amount of the injection material 4 can be reused, so that an efficient operation without wasting the abrasive grains 3 can be performed, and cost reduction can be achieved. The apparatus can be made compact.

  Further, in the present embodiment, a predetermined amount of the injection material 4 (abrasive grain 3) is caused to collide with the unit area of the subject 1, so that it is not necessary to evaluate by narrowing down the wear range. Long time injection to the body 1 is possible, and evaluation of the small subject 1 can be performed reliably. Moreover, since no large power is required and less power is consumed, the cost (manufacturing cost and running cost) is excellent. In addition, the device itself can be made compact.

  Further, in this embodiment, by repeating the injection of a predetermined amount of the injection material 4 onto the subject 1, even if it is an extremely hard subject 1 (DLC), the abrasive grains are softer than the subject 1. It can be evaluated by abrasion with 3 (alumina).

  Further, in the present embodiment, since the injected spray material 4 quickly falls after colliding with the surface of the subject 1, the fine abrasive grains 3 and the wear powder are not scattered in the air for a long time, and the conventional erosion is not caused. There is no need to improve the airtightness in the injection chamber as in the test machine, or to install a dust collection filter or cyclone for collecting the abrasive grains 3, and it is excellent in practicality that facilitates downsizing of the device. It will be a thing.

  Further, in this embodiment, since the propellant storage unit 6 and the propellant recovery unit 7 are provided with the stirring mechanism 9, the abrasive grains in the propellant 4 are uniformly dispersed and always have a constant abrasive grain concentration. The injection material 4 is fed to the injection unit 5 so that there is no error due to uneven abrasive grain concentration, and the nozzle 8, the injection material supply means 11 and the injection material delivery means 10 of the injection unit 5 are not clogged. It will be.

  Further, in this embodiment, since the fixing mechanism 12 is provided with a rotation mechanism, the characteristics of the film can be further improved by performing various tests on the angle of the surface of the subject 1 with respect to the spray material 4 to be sprayed. It will be more practical than can be grasped more accurately.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

  In the present invention, for example, in metal products and synthetic resin products, surface modification such as improvement of surface strength, improvement of wear resistance or improvement of corrosion resistance is performed. This is useful when evaluating a coating provided by a method such as thermal spraying.

DESCRIPTION OF SYMBOLS 1 Subject 2 Liquid 3 Abrasive grain 4 Injection material 5 Injection part 6 Injection material storage part 7 Injection material collection | recovery part 8 Nozzle
10 Injection material delivery means
11 Injection material supply means

Claims (5)

  A film evaluation apparatus for evaluating characteristics of a surface film of a subject such as a metal material or a synthetic resin material, wherein the subject is sprayed with compressed air together with compressed air into the subject with abrasive particles mixed therein. An injection unit for reducing the amount, an injection material storage unit for storing a predetermined amount of the injection material supplied to the injection unit, and an injection separate from the injection material storage unit for collecting the injection material injected from the injection unit An injection material recovery unit, and the injection material recovered by the injection material recovery unit is configured to be sent out to the injection material storage unit by the injection material delivery means, and a predetermined amount with respect to the subject. The coating film evaluation apparatus is configured to repeat the injection of the injection material.   The film evaluation apparatus according to claim 1, wherein an opening shape of a nozzle for injecting the injection material in the injection unit is a square shape of 1 mm or less × 1 mm or less.   The film evaluation apparatus according to claim 1, wherein an opening shape of a nozzle for injecting the injection material in the injection unit is a square of 1 mm × 1 mm.   4. The film evaluation apparatus according to claim 1, wherein abrasive grains having an average particle diameter of 5 μm or less are employed as the abrasive grains contained in the spray material. 5.   5. The film evaluation apparatus according to claim 1, wherein the injection unit is configured to supply the injection material from the injection material storage unit via an injection material supply unit, and the injection material supply unit Is a structure for discharging the spray material by pressurizing the inside of the spray material storage section and supplying the spray material to the spray section.

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