JP2007222848A - Painting tester of water paint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable an easy and economical experimental painting operation in case of carrying out the painting operation such as an experimental spraying and blowing with some water paint to a surface to be painted of a painting substrate used on trial in order to judge an advisability about the water paint. <P>SOLUTION: A painting tester 1 of the water paint 2 is provided with a support 7 capable of supporting the painting substrate 6 provided with the surface to be painted 5 which is experimentally painted, an air supply arrangement 10 discharging air 8 in which a temperature and humidity are controlled to the predetermined value so that the air 8 turn to an air layer 9 flowing in one direction A along the surface to be painted 5, and a spray nozzle 11 spraying and blowing the water paint 2 under test so as to traverse the air layer 9 to the surface to be painted 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention adjusts the temperature and humidity of the air around the surface to be coated on a trial basis so that the temperature and humidity become predetermined values. In this state, the water-based paint to be tested is applied to the surface to be coated. The present invention relates to a coating test apparatus for water-based paint sprayed and sprayed.

  Since the solvent for the water-based paint is mainly water, it is environmentally preferable to use the water-based paint as a paint as compared to using the solvent as a solvent. Further, the “look” of the dried coating film after painting with the water-based paint is not inferior to that of the solvent-based paint. For these reasons, the water-based paint has recently been diversified in mass-produced products such as automobile bodies.

  Here, the criterion for judging the quality of the above-mentioned dried coating film is primarily whether the surface color is desired or not, but the smoothness of the skin (smooth) The main thing is whether or not the glossiness is desired.

  Conventionally, a coating apparatus using the water-based paint is disclosed in Patent Document 1 below. According to this publication, the coating apparatus includes a spray nozzle that sprays and sprays a water-based paint on the surface of a workpiece such as an automobile body to be painted.

  When a painting operation is performed using the above-described coating apparatus, first, a water-based paint is sprayed and sprayed onto the surface of the work with a spray nozzle. Then, moisture evaporates from the resulting coating film into the surrounding air, and solidification proceeds. Then, if the said coating film is heat-dried, a dry coating film will be obtained and a coating operation will be completed.

  In the coating operation using the water-based paint, when moisture evaporates from the coating film immediately after spraying, the evaporation speed is remarkably influenced by each value of air temperature and humidity around the coating film. Here, when the moisture evaporation rate is too slow, the fluidity of the coating film tends to cause dripping in each part of the coating film, and the smoothness of the skin is hindered, and the “look” is reduced. Tend to. On the other hand, when the evaporation rate of moisture is too fast, before the surface of the coating film immediately after spraying tries to become smooth, solidification progresses and the smoothness of the skin cannot be obtained. “Look” tends to decline.

  Therefore, conventionally, the above-described painting operation is generally performed by installing a work in a booth for an actual machine and adjusting the temperature and humidity of the air in the booth to a predetermined value so that the air has a desired atmosphere. To do. And thereby, the painting operation | work with respect to the said workpiece | work is made | formed so that the evaporation rate of the said water may turn into a desired rate.

  On the other hand, when trying to use a new water-based paint, for example, when changing the paint specification of a manufactured product from one specification to another new specification, first, various water-based paints are prototyped. The Next, a trial painting operation using each of these water-based paints is performed, and it is determined whether any of these water-based paints is appropriate as a paint. Then, the water-based paint determined to be appropriate as the paint is used for painting the target manufactured product in the booth for the actual machine.

  In general, a trial painting operation when using a new water-based paint as described above is performed as follows. First, various paint components of the water-based paint including water are set, and various mixing ratios of these paint components are set to prepare various new water-based paints. On the other hand, a dedicated booth for performing the above-described experimental painting work is provided. Then, the temperature and humidity of the air in the dedicated booth are adjusted to predetermined values, that is, the air in the dedicated booth is adjusted to have a desired atmosphere.

  In the dedicated booth, a plurality of objects to be coated having a surface to be painted on a trial basis are installed, and a trial painting operation is performed on each surface to be painted with the water-based paint. Done. Thereby, the evaporation rate of the water | moisture content from the coating film on the said to-be-coated surface formed by the said spraying is made into a desired rate. In this way, the quality of the “look” of the dried coating film formed through the desired atmosphere of air is determined.

  Next, the temperature and humidity of the air in the dedicated booth are adjusted to other predetermined values, that is, the air in the dedicated booth is adjusted to have another desired atmosphere. Then, a test painting operation similar to the above is performed. In this way, the quality of the “look” of the dry coating film formed through the other desired atmosphere of the air is determined.

  Thereafter, the same operation as described above is repeated. And based on the judgment of the quality of the "appearance" of each dry paint film formed through the various desired atmospheres of the air, it is judged whether any of the water-based paints is appropriate. Further, the final judgment as to whether or not the water-based paint is appropriate is achieved by a trial painting operation in the actual booth.

JP 2002-233812 A

  By the way, an exclusive booth provided for performing a trial painting operation on the object to be coated needs to perform an installation operation of the object to be coated therein. For this reason, the volume in the exclusive booth is extremely large as compared with the case where the object to be coated is small.

  Therefore, first, if the atmosphere of air in the dedicated booth is changed from a desired one to another desired one, it takes a long time and the work is complicated. In addition, making the inside of the booth uniform in a desired atmosphere is an extremely complicated operation. Second, the trial painting work is expensive because it is necessary to adjust an unnecessarily large amount of air in the dedicated booth.

  The present invention has been made by paying attention to the above-described circumstances, and an object of the present invention is to determine the suitability of a water-based paint as a paint for a water-based paint used for testing. When performing a painting operation of spraying and spraying on the surface to be painted of the body on a trial basis, this trial painting operation should be easy and inexpensive.

  According to the first aspect of the present invention, there is provided a support device 7 capable of supporting an object to be coated 6 having a surface 5 to be painted on a test basis, and an air 8 whose temperature and humidity are adjusted to predetermined values. An air supply device 10 that discharges the air 8 so as to form an air layer 9 that flows in one direction A along the painted surface 5, and the water-based paint 2 to be tested are applied to the painted surface 5 with the air layer And a spray nozzle 11 that sprays and sprays across 9.

  In addition to the invention of claim 1, the invention of claim 2 moves forward and backwards C in one direction B when viewed from a line of sight orthogonal to the surface to be coated 5 (FIG. 3). , D, while the spray nozzle 11 travels in one direction G orthogonal to the one direction B, and is moved backwards and forwards H, I.

  According to a third aspect of the present invention, in addition to the second aspect of the present invention, the one-way A in which the air layer 9 flows along the surface to be coated 5 and the body to be coated 6 move forward and backward. The one direction B is made to coincide with each other.

  According to a fourth aspect of the invention, in addition to the first aspect of the invention, the support device 7 is configured such that the surface to be coated 5 extends in a substantially vertical direction, and the air layer 9 extends along the surface to be painted 5. The air supply device 10 is configured to flow in the direction.

  In this section, the reference numerals appended to the above terms are not to be construed as limiting the technical scope of the present invention to the section “Example” described later or the contents of the drawings.

  The effects of the present invention are as follows.

  According to the first aspect of the present invention, there is provided a supporting device capable of supporting a body to be coated having a surface to be painted on a test basis, and air whose temperature and humidity are adjusted to predetermined values along the surface to be painted. An air supply device that discharges the air so as to form an air layer that flows in one direction, and a spray nozzle that sprays and sprays the aqueous paint to be tested across the air layer on the surface to be coated. I have.

  That is, for a certain water-based paint, in order to determine the suitability of the paint as a paint, when performing the painting work of spraying and spraying the water-based paint on the surface to be coated, the periphery of the surface to be coated is The desired atmosphere of the air in which the temperature and humidity are set to the desired values by the air layer, that is, the same atmosphere as in the booth for an actual machine in which the water-based paint is used in the future. Thereby, the evaporation rate of the water | moisture content from the coating film on the said to-be-coated surface formed by the said spraying is made into a desired rate. In this way, the quality of the “appearance” of the dried coating film formed through the desired atmosphere of air is determined. Then, the water-based paint determined to be appropriate as a paint based on the judgment of “good” is used for painting work of a target manufactured product in the booth for the actual machine.

  Here, the formation of the desired atmosphere of air around the surface to be coated is achieved by flowing an air layer over a narrow range along the surface to be coated. Further, since the amount of air is sufficient to form an air layer, the flow rate is small. For this reason, in the above-described experimental painting work, when trying to form a desired atmosphere as described above, according to the above-described invention, the trial painting work is less than the conventional technique using the dedicated booth. Extremely easy and inexpensive.

  According to a second aspect of the present invention, the object to be coated moves forward and backward in one direction when viewed from a line of sight orthogonal to the surface to be coated, while the spray nozzle is orthogonal to the one direction. It moves in one direction and moves backwards.

  For this reason, when it is going to form a uniform coating film in each part of the said to-be-coated surface by spraying and spraying water-based paint with the spray nozzle with respect to the to-be-coated surface, this is the said to-be-coated body and spray nozzle. Each is achieved by a linear and simple moving motion. Therefore, the handling of the coating test apparatus can be facilitated, and the configuration is simplified. As a result, the trial coating operation can be performed more easily and inexpensively.

  According to a third aspect of the present invention, the one direction in which the air layer flows along the surface to be coated and the one direction in which the body to be coated moves forward and backward are made to coincide with each other.

  For this reason, the width dimension of the air layer is equal to the surface to be coated regardless of the size of the movement trajectory of the forward and backward movement in the one direction of the surface to be painted as viewed from the line of sight orthogonal to the surface to be painted. It is only necessary to match the width dimension. Therefore, the flow rate of the air layer can be made smaller, and the capacity of the air supply device can be further reduced. Therefore, the configuration of the coating test apparatus can be simplified correspondingly, and the above-described experimental coating work can be made cheaper.

  According to a fourth aspect of the present invention, the support device is configured such that the surface to be coated extends substantially vertically, and the air supply device is configured so that the air layer flows upward along the surface to be coated. Yes.

  Here, it is considered that the temperature of the air layer is usually higher than the ambient temperature of air around the coating test apparatus. Therefore, according to this, the air layer tends to rise in a free state, and the flow direction of the air layer matches the forced flow direction of the air layer by the air supply device. . For this reason, this air layer flows for a longer distance along the surface to be coated while maintaining a laminar flow state more reliably. Therefore, the above-described test painting operation can be performed with higher accuracy.

  In connection with the coating test apparatus for water-based paints according to the present invention, in order to determine the suitability of a certain water-based paint as a paint, the water-based paint is sprayed on a surface to be coated of a test object to be used as a test. The best mode for carrying out the present invention is as follows in order to realize the purpose of making it possible to easily and inexpensively perform the trial painting work when the painting work of spraying is performed.

  That is, the coating test apparatus includes a support device that can support a target object having a surface to be painted on a test basis, and air whose temperature and humidity are adjusted to predetermined values. An air supply device that discharges the air so as to form an air layer that flows in one direction along the spray, and a spray nozzle that sprays and sprays the water-based paint to be tested across the air layer on the surface to be coated. It has.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In the figure, reference numeral 1 denotes a coating test apparatus for the water-based paint 2, which is supported on the work surface 3. For convenience of explanation, the following description will be given with the arrow Fr as the front.

  The coating test apparatus 1 includes a support device 7 that can support a body 6 having a surface 5 to be painted on a test basis, and an air 8 whose temperature and humidity are adjusted to predetermined values. An air supply device 10 that discharges the air 8 so as to form an air layer 9 that flows in one direction A along the painted surface 5, and the water-based paint 2 to be tested are applied to the painted surface 5 with the air layer Spray nozzle 11 that sprays and sprays across 9, another support device 12 that supports the spray nozzle 11, and the water-based paint 2 that is pressurized and supplied to the spray nozzle 11 and sprayed by the spray nozzle 11. The illustrated liquid pump is provided.

  The object to be coated 6 is a rectangular flat plate made of sheet metal, and a support shaft 15 projects from the center of the back surface 14 thereof. An axis 16 of the support shaft 15 extends in a direction perpendicular to the object to be coated 6.

  The support device 7 includes a base 18 supported on the work surface 3 via wheels 17 so as to be movable to an arbitrary position on the work surface 3. The base 18 has a box shape, and an opening is formed in the front plate 19, and the opening of the front plate 19 is closed by a door 20 so as to be opened and closed. Further, front and rear openings 22 and 23 are formed in the upper surface plate 21 of the base 18. The front opening 22 is formed in the front part of the upper surface plate 21 and extends to the left and right, and the rear opening 23 is formed at the rear part of the upper surface plate 21 at substantially the center in the width direction.

  The support device 7 is guided by a bracket 26 supported inside the base 18 and a vertical guide 27 supported by the bracket 26, and is moved toward the one direction B corresponding to the vertical direction. A vertically long movable body 28 that is moved forward and backward (upward and downward movement) C and D together with the coating body 6, and an upper end portion of the movable body 28 that protrudes outward from the base 18 through the rear opening 23. A support 29 such as a chuck that is supported and removably supports the support shaft 15 of the object to be coated 6, and a driving device 30 that drives the moving body 28 to move the moving body 28 back and forth C and D. And a rotating device 31 for moving the object 6 to be rotated by a predetermined angle (90 °) around the axis 16 of the support shaft 15 and performing backward rotations E and F.

  The driving device 30 includes a pair of upper and lower chain wheels 34 and 35 supported by the bracket 26, and an endless chain 36 that is wound around the chain wheels 34 and 35 and a part of which is connected to the moving body 28. The endless chain 36 is provided with a reduction motor (not shown) that enables forward and reverse rotation. The endless chain 36 interlocked with the forward and reverse drive of the electric motor moves the moving body 28 together with the body 6 to be moved, and moves C and D in the reverse direction. This moving speed is about 0.1-0.2 m / sec and is a constant speed, but this speed can be adjusted.

  The support shaft 15 of the body to be coated 6 is supported by the support body 29 of the support device 7 so that the surface to be coated 5 and the back surface 14 of the body to be coated 6 extend in a substantially vertical direction. The object to be coated 6 is located slightly away from the moving body 28 and the support body 29.

  At the starting point of the forward movement C of the object to be coated 6 (the end point of the backward movement D), the object to be coated 6 is entirely accommodated inside the base 18 (dashed line in FIGS. 1 and 3). On the other hand, at the end point of the forward movement C of the coated body 6 (starting point of the backward movement D), the coated body 6 is entirely exposed outside the base 18 (solid line in each figure). When the moving body 28 moves forward and backwards C and D together with the object 6 to be coated, the object 6 can pass through the rear opening 23.

  The driving device 30 may be an electric or pneumatic cylinder, or may be a screw jack type using a ball screw. The rotating device 31 is driven by an electric motor, a solenoid, a rotary cylinder, or the like.

  The air supply device 10 adjusts the temperature and humidity of the air sucked from the atmosphere side to predetermined values to obtain the air 8 described above, and then discharges the air 8, and the air adjustment device 39. An air guide duct 40 that guides the air 8 discharged from the air to the object 6 side and discharges the air 8 into the air layer 9. A part of the air guide duct 40 is constituted by the base 18. That is, the inlet portion 42 of the air 8 is formed in the side plate 41 of the base 18, the rear opening 23 is the discharge portion 43 of the air 8, and the inside of the base 18 is a flow passage of the air 8. Has been. Further, a flexible duct 44 is provided for allowing the air 8 discharged from the air conditioning device 39 to flow into the base 18 through the inlet 42.

The flow rate (m ³ / min) of the air layer 9 by the air 8 is kept constant. Also. The temperature of the air 8 can be adjusted in the range of 15 to 35 ° C., and can be set to, for example, approximately 20, 25, or 30 ° C. The humidity of the air 8 is relative humidity and can be adjusted in the range of 60 to 90%, and can be set to, for example, approximately 65, 75, or 80%.

  The air 8 discharged from the air adjusting device 39 is caused to flow into the base 18 through the flexible duct 44 and the inlet portion 42. Then, the air 8 passes through the inside of the base 18 and is discharged to the outside from the rear opening 23 (discharge portion 43) to form the air layer 9. The air layer 9 flows in the one direction A along the coated surface 5 and the back surface 14. The one direction A of the air layer 9 and the one direction B in which the object to be coated 6 moves forward and backward C and D are made to coincide with each other. The flow velocity of the air layer 9 toward the one direction A is faster than the moving speed of the moving body 28 of the support device 7 together with the object 6 to be coated, and is about 0.2 to 0.5 m / sec.

  The spray nozzle 11 sprays the water-based paint 2 in a conical shape on the surface 5 to be coated. The hole core of the spray nozzle 11 and the center of the sprayed water-based paint 2 are orthogonal to the surface 5 to be coated. The sprayed water-based paint 2 may have a flat fan shape or the like.

  The other support device 12 is guided by a lateral guide 47 supported by the bracket 26 and moves in a direction G corresponding to the left and right lateral directions, and a movable body 48 that moves backward and forward H and I, and this movement. A driving device 49 for driving the moving body 48 is provided so that the body 48 moves forward and backward. The upper part of the moving body 48 protrudes outward from the base 18 through the front opening 22 and supports the spray nozzle 11.

  The drive device 49 includes a pair of left and right chain wheels 51, 52 supported by the bracket 26, an endless chain 53 wound around the chain wheels 51, 52 and a part of which is connected to the moving body 48, A speed reduction motor that enables the endless chain 53 to rotate forward and backward is provided. The endless chain 53 interlocking with the forward and reverse driving of the electric motor moves the moving body 48 together with the spray nozzle 11 and makes it move backward and forward H and I. This moving speed is about 0.2-0.3 m / sec and is a constant speed, but this speed can be adjusted.

  A control device (not shown) that can automatically control each of the above devices is provided.

  The automatic coating operation of spraying and spraying the water-based paint 2 to be tested on the surface to be coated 5 of the object 6 to be tested will be described using the coating test apparatus 1.

  First, the object to be coated 6 is supported on the support 29 of the support device 7, and the driving device 30 is driven to move the moving body 28 together with the object to be coated D to return to the original position (in FIGS. 1 and 3). It is located on the alternate long and short dash line). Next, the air adjusting device 39 of the air supply device 10 is driven, and the air 8 is discharged from the rear opening 23 (discharge portion 43) toward the upper outside of the base 18 through the air guide duct 40. Let On the other hand, the water-based paint 2 is sprayed from the spray nozzle 11.

  Next, the moving body 28 is moved forward C together with the object to be coated 6 by driving of the driving device 30 of the supporting device 7. Then, this body 6 to be coated passes through the rear opening 23 (discharge portion 43) and begins to protrude outwardly from the base 18. At this time, air by the air 8 discharged from the rear opening 23 (discharge portion 43) along the surface 5 and the back surface 14 of the portion of the body 6 that protrudes outward from the base 18. Layer 9 flows.

  On the other hand, the driving device 49 of the other supporting device 12 is driven to move the moving body 48 together with the spray nozzle 11 and repeat the backward movements H and I. Then, the water-based paint 2 sprayed from the spray nozzle 11 is sprayed onto the surface to be coated 5 across the air layer 9. After this state continues, when the object 6 reaches the end point of the forward movement C, which is the upper area of the water-based paint 2 sprayed by the spray nozzle 11, (the solid line in each figure), the object to be coated is reached. The spraying of the water-based paint 2 onto the entire surface 5 is completed, and a first layer coating is formed.

  When the object to be coated 6 reaches the end point of the forward movement C, the object to be coated 6 is rotated forward E by a predetermined angle of 90 ° by driving the rotation device 31 of the support device 7 (FIG. 3). Middle two-dot chain line). Next, the moving body 28 is moved back D together with the object to be coated 6 by driving the driving device 30. At this time, spraying of the water-based paint 2 by the spray nozzle 11 and driving of the driving device 49 of the other supporting device 12 are continued. That is, during the backward movement D of the object 6 to be coated, the water-based paint 2 is further sprayed on the entire surface 5 to be coated, and a second-layer coating film is formed on the first layer. When the object to be coated 6 reaches the end point of the backward movement D, the object to be coated 6 and the moving object 28 are located at the original position (the chain line in FIGS. 1 and 3) and stopped.

  And the coating film of the said 1st, 2nd layer forms the uniform coating film of each part by the water-based coating material 2 on the said to-be-coated surface 5. FIG. In the case of forming this coating film, contrary to the above, the object 6 to be coated may be first moved backward D and then moved forward C. Further, in the same manner as described above, the third and fourth coating films may be formed, or only one layer may be formed.

  While the water-based paint 2 is sprayed on the surface to be coated 5 of the body to be coated 6 and the coating film is formed, the surface to be coated 5 is covered with an air layer 9. That is, the periphery of the surface to be coated 5 is a desired atmosphere of air 8 in which the temperature and humidity are set to predetermined values by the air layer 9. Then, moisture evaporates from the coating film on the surface to be coated 5 formed by spraying into the surrounding air 8 and solidification proceeds, and a coating film is formed on the surface to be coated 5. Thereby, the above-mentioned experimental painting work is completed.

  Thereafter, the coating 6 on the surface to be coated 5 is dried by light irradiation, for example, by removing the body 6 from the support device 7. The quality of “look” is judged for the dried coating film obtained in this way. If it is judged that the “look” is good, the water-based paint 2 is judged to be appropriate as a paint, and is used for painting work of a target manufactured product or the like in an actual booth.

  Specifically, for the water-based paint 2, the temperature and humidity of the air 8 are set to be 65% at 20 ° C., 75% at 25 ° C., and 80% at 30 ° C. Three tests of stages are performed. The evaporation rate of moisture from the coating film on the object 6 is more affected by humidity than temperature, and is relatively fast in the first stage and relatively slow in the third stage. As a result of the above three tests, if the “appearance” of each dry coating film for the water-based paint 2 is determined to be good or better, the water-based paint 2 is determined to be appropriate as a paint, and the intended production Used for painting work.

  According to the said structure, the support apparatus 7 which can support the to-be-coated body 6 provided with the to-be-painted surface 5 coated on a trial, and the air 8 by which temperature and humidity were adjusted to the predetermined value are the said to-be-coated The air supply device 10 that discharges the air 8 so as to become the air layer 9 that flows in one direction A along the surface 5 and the water-based paint 2 to be tested are applied to the surface 5 to be coated. And a spray nozzle 11 for spraying and spraying across.

  That is, when a water-based paint 2 is subjected to a painting operation in which the water-based paint 2 is sprayed and sprayed on the surface to be coated 5 in an attempt to determine the suitability as a paint, The surroundings have a desired atmosphere of the air 8 in which the temperature and humidity are set to desired values by the air layer 9, that is, the same atmosphere as in the booth for an actual machine where the water-based paint 2 will be used in the future. Thereby, the evaporation rate of the water | moisture content from the coating film on the said to-be-coated surface 5 formed by the said spraying is made into a desired rate. In this way, whether or not the “look” of the dried coating film formed through the desired atmosphere of the air 8 is judged. Then, the water-based paint 2 judged to be appropriate as a paint based on the judgment of “good” is used for painting work of a target manufactured product or the like in the booth for an actual machine.

  Here, the formation of the desired atmosphere of the air 8 around the surface 5 to be coated is achieved by causing the air layer 9 to flow in a narrow range along the surface 5 to be coated. In addition, since the amount of the air 8 is sufficient to form the air layer 9, the flow rate is sufficient. For this reason, when trying to form the atmosphere as described above in the above-described experimental painting work, the above-described configuration makes the trial painting work extremely difficult compared to the conventional technique using the dedicated booth. Easy and inexpensive.

  Further, as described above, when viewed from a line of sight orthogonal to the surface to be coated 5 (FIG. 3), the object to be coated 6 is moved in one direction B and moved back and forth C and D while the spray is applied. The nozzle 11 is moved in one direction G orthogonal to the one direction B and moved backwards and forwards H and I.

  For this reason, when it is going to form a uniform coating film in each part of the said to-be-coated surface 5 by spraying and spraying the water-based paint 2 with the spray nozzle 11 with respect to the to-be-coated surface 5, this is the said to-be-coated This is achieved by a linear and simple movement of the body 6 and the spray nozzle 11 respectively. Therefore, the coating test apparatus 1 can be easily handled and the configuration is simplified accordingly, and as a result, the trial coating operation can be performed more easily and inexpensively.

  Further, as described above, the one direction A in which the air layer 9 flows along the surface to be coated 5 and the one direction B in which the object to be coated 6 moves forward and backward C and D are made to coincide with each other. ing.

  For this reason, when viewed from a line of sight orthogonal to the surface 5 to be coated (FIG. 3), the air is independent of the size of the forward and backward movements C and D in the one direction B of the surface 5 to be painted. The width dimension of the layer 9 only needs to match the width dimension of the surface 5 to be coated. Therefore, the flow rate of the air layer 9 can be reduced, and the capacity of the air supply device 10 can be further reduced. Therefore, the configuration of the coating test apparatus 1 can be simplified correspondingly, and the above-described experimental coating work can be made cheaper.

  Further, as described above, the support device 7 is configured such that the surface 5 to be coated extends substantially in the vertical direction, and the air supply device 10 so that the air layer 9 flows upward along the surface 5 to be painted. Is configured.

  Here, it is considered that the temperature of the air layer 9 is usually higher than the ambient temperature of air around the coating test apparatus 1. Therefore, the above-described configuration is adopted. According to this, the air layer 9 tends to rise in a free state, and the flow direction of the air layer 9 is the forced flow of the air layer 9 by the air supply device 10. Match the direction. For this reason, the air layer 9 flows for a longer distance along the surface to be coated 5 while maintaining a laminar flow state more reliably. Therefore, the above-described test painting operation can be performed with higher accuracy.

  In addition, although the above is based on the example of illustration, the said to-be-coated surface 5 may be inclined or horizontal. Further, the flow direction of the air layer 9 may be inclined or horizontal as long as it is along the surface 5 to be coated, or may be lowered.

  Further, only one of the object to be coated 6 and the spray nozzle 11 may be moved, and the support devices 7 and 12 may be constituted by a robot. Further, almost the entire water-based paint 2 sprayed by the spray nozzle 11 may be located inside the air layer 9.

  Alternatively, the air guide duct 40 may be formed entirely of a flexible tube, and the end of the tube on the discharge portion 43 side may be fixed to the moving body 28 on the coated body 6 side. In this way, since the relative position between the surface to be coated 5 and the discharge portion 43 is constant, the flow rate of the air layer 9 discharged from the discharge portion 43 and flowing along the surface to be coated 5 is determined. Conditions are constant. Therefore, the above-described test painting operation can be performed with higher accuracy.

It is a side view of a coating test apparatus. 1 is an overall front view of a coating test apparatus. FIG. 3 is a partially enlarged detail view of FIG. 2. It is a top view of a coating test apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coating test apparatus 2 Water-based paint 5 Surface to be coated 6 Body to be coated 7 Support apparatus 8 Air 9 Air layer 10 Air supply apparatus 11 Spray nozzle 12 Support apparatus 14 Back surface 15 Support axis 16 Axis 18 Base 21 Upper surface plate 22 Front opening 23 Rear opening 28 Moving body 29 Support body 30 Driving device 31 Rotating device 39 Air adjusting device 40 Air guide duct 43 Discharge unit 48 Moving body 49 Driving device A One direction B One direction C Forward movement D Reverse movement E Forward rotation F Reverse rotation G One direction H Forward movement I Reverse movement

Claims (4)

  A support device that can support an object to be coated having a surface to be painted on a trial basis, and air in which air whose temperature and humidity are adjusted to predetermined values flows in one direction along the surface to be painted An air supply device that discharges air to form a layer, and a spray nozzle that sprays and sprays the aqueous paint to be tested across the air layer on the surface to be coated. Water paint coating test equipment.   While looking at the line of sight orthogonal to the surface to be coated, the object to be coated is moved in one direction and moved backward, while the spray nozzle is moved in one direction orthogonal to the one direction, The water-borne paint coating test apparatus according to claim 1, wherein the apparatus is moved backward.   3. The water-based paint according to claim 2, wherein the one direction in which the air layer flows along the surface to be coated and the one direction in which the body to be coated moves forward and backward match each other. Painting test equipment.   2. The support device is configured such that the surface to be coated extends substantially vertically, and the air supply device is configured such that the air layer flows upward along the surface to be coated. The coating test apparatus for water-based paints as described in 1.

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