JP2008534242A - Coating film forming device - Google Patents

Abstract

Provided is a coating film forming apparatus capable of realizing a space saving required for painting.
The object moving device (41) for moving the object (50), the spray gun moving device for moving the spray gun (30) for spraying the paint, the object moving device (41), and the spray gun (30 ) And a control device for controlling the operation of the spray gun moving device, and the control device performs partial reciprocation of the object to be coated (50) while the paint is sprayed from the spray gun (30). A coating film forming apparatus that moves in a certain direction so that overcoating is sequentially performed, wherein the control device is configured to position the object to be coated (50) and the spray gun during the coating of the object to be coated (50). A coating film forming apparatus that shifts the object to be coated (50) and the spray gun (30) while keeping the pressure constant.

Description

  The present invention relates to a coating film forming apparatus.

  Conventionally, in order to perform coating with a uniform film thickness on an object to be coated, a method of repeatedly applying a spray pattern of paint sprayed from a spray gun has been used. The overcoating is performed as shown in FIG. 7 by a coating film forming apparatus equipped with an air conditioner, a spray gun, and the like. That is, the paint is sprayed from the spray gun fixed to the central portion in the paint booth 151 to form the spray pattern 153, and the object moving device 152 (not shown) is disposed on the object 152 disposed below the spray gun. Thus, while reciprocating at a predetermined speed in the vertical direction of the figure, it is carried out by laterally moving in the arrow S direction (the direction from the left to the right in the figure) at a predetermined pitch.

  Further, as shown in FIG. 8, a spray pattern 153 is formed by spraying paint from a spray gun (not shown) disposed above the object 152 fixed at the center in the coating booth 151. At the same time, the spray gun is moved in the arrow S direction (from left to right in the figure) at a predetermined pitch while reciprocating at a predetermined speed in the vertical direction in the figure.

  As described above, when applying the overcoat by moving the object to be coated while the spray gun is fixed, the object to be coated starts from a position away from the spray pattern. It is necessary to continue painting until it completely passes through the spray pattern. In other words, as a space required for coating, a large space of (vertical width of the object to be coated × 2 + spray pattern width) × (horizontal width of the object to be coated × 2 + spray pattern width) was required.

  If the spray gun is moved and the overcoat is applied with the object to be coated fixed, the spray pattern starts from a position away from the object and the spray pattern It is necessary to continue painting until it passes completely. That is, as a space required for painting, a large space of (vertical width of the object to be coated + spray pattern width × 2) × (horizontal width of the object to be coated + spray pattern width × 2) is required. Furthermore, when painting is performed in this way, it is necessary to provide extra space between the inner wall of the painting booth and the spray pattern in order to prevent the spray pattern from fouling the inner wall of the painting booth. Was necessary.

  When the space required for coating is large as described above, there are problems that the installation place of the coating film forming apparatus is restricted and the energy for air-conditioning the interior of the coating booth becomes large.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a coating film forming apparatus capable of realizing a space saving required for painting.

  The object of the present invention is to provide an object moving device for moving an object to be coated, a spray gun moving device for moving a spray gun for spraying paint, and the object moving device, the spray gun and the spray gun moving device. A control device for controlling the operation, the control device spraying paint from the spray gun in a fixed direction so that partial overcoating is sequentially performed while reciprocating the workpiece. A coating film forming apparatus to be moved, wherein the controller is configured to keep the relative position between the object to be coated and the spray gun constant during the coating of the object to be coated and the spraying device. This is achieved by a coating film forming apparatus that shifts the gun.

  In this coating film forming apparatus, it is preferable that the shift movement direction of the object to be coated and the spray gun is opposite to the movement direction of the object to be coated for sequentially performing partial overcoating.

  Further, it is preferable that the shift movement of the object to be coated and the spray gun is performed when the spray center of the spray gun is at a position substantially half the length of the object to be coated in the movement direction.

  Further, it is preferable that the control device causes the spray gun to reciprocate synchronously in a direction opposite to the reciprocating direction with respect to the reciprocating motion of the object to be coated.

  ADVANTAGE OF THE INVENTION According to this invention, the coating-film formation apparatus which can implement | achieve space saving of the space required for coating can be provided.

  Hereinafter, the coating film forming apparatus of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic cross-sectional view of a coating film forming apparatus according to an embodiment of the present invention, and FIG. 2 is an XX cross-sectional view thereof.

  As shown in FIG. 1, the coating film forming apparatus 1 includes an air conditioner 10, a pipe 15, a coating apparatus main body 20, a storage unit 40, and a control device (not shown). The air conditioner 10 is a device that supplies air whose temperature and humidity have been adjusted to the coating apparatus main body 20, and the upper part thereof communicates with the upper part of the coating apparatus main body 20 via a pipe 15.

  The coating apparatus main body 20 is divided into an air supply chamber 21, a coating booth 22 and an exhaust chamber 23 from above, and the air supply chamber 21 and the coating booth 22 are separated by an air supply filter 24. The exhaust chamber 23 is separated by a dust collecting filter 25.

  The air supply chamber 21 includes temperature detection means and humidity detection means (not shown) that measure the temperature and humidity of the air supply chamber 21. As the temperature detection means, for example, a temperature sensor such as a thermistor or a thermocouple can be used. Moreover, as a humidity detection means, humidity sensors, such as a polymer film humidity sensor, a ceramic humidity sensor, and an electrolyte humidity sensor, can be used, for example.

  The painting booth 22 includes a spray gun 30 that sprays paint. The spray gun 30 is connected to a spray gun moving device, a paint supply device, an air control panel, a high voltage generator, a cable and the like (not shown). Further, the spray gun 30 is configured to change the distance from the object to be coated 50.

  Examples of the spray gun 30 include a rotary bell type atomizer and an air atomizer. The rotating bell type atomizing coating machine is a type of coating machine that has a bell cup that rotates at a high speed at the tip of the gun and atomizes the paint discharged to the bell cup by the centrifugal force generated by the rotation of the bell cup. Further, the rotating bell type atomizing coating machine ejects shaping air that controls the pattern width of the spray pattern of the paint by adjusting the spray direction of the atomized particles of the paint that scatters radially outward from the outer peripheral edge of the bell cup. An air nozzle is provided. In addition, the air atomization type coating machine is provided with a jet port for compressed air (atomization air) surrounding the vicinity of the discharge port of the paint, and discharges the paint from the discharge port and jets the compressed air from the jet port. This is a type of coating machine that atomizes the paint. Moreover, it is common to provide the pattern air ejection port which controls the pattern width of a spray pattern in the outer side of the compressed air ejection port.

  The spray gun moving device (not shown) is a device that moves the spray gun 30 in response to a command from a control device to be described later, and examples thereof include an air cylinder and a biaxial actuator. Moreover, as a coating material supply apparatus, the syringe type syringe pump etc. which supply a coating material can be illustrated, for example, pushing out the piston part of the syringe filled with the fixed amount of coating material with the micro actuator. The air control panel is a device that controls the air pressure for rotating the bell of the rotary bell type atomizing coating machine, the flow rate of the shaping air, and the like. The high voltage generator is a device for applying the atomized particles atomized by the atomizing device to the object to be coated 50 with static electricity.

  The exhaust chamber 23 includes an exhaust device (not shown) that exhausts the air supplied from the air conditioner 10 to the outside.

  As shown in the cross-sectional view of FIG. 2, the storage unit 40 is provided adjacent to the painting booth 22 and includes a workpiece moving device 41 that moves the workpiece 50. A space 44 having a predetermined size is formed below the partition plate 43 that separates the storage unit 40 and the coating booth 22. The object moving device 41 includes a fixing jig 42 that fixes the object 50 in the painting booth 22 through the space 44. The object moving device 41 is not particularly limited as long as it can move the object 50 freely on the same plane in the painting booth 22. In the present embodiment, a biaxial actuator is employed as the article moving device 41.

  The control device is connected to the air conditioner 10, the temperature sensor, the humidity sensor, the spray gun 30, the spray gun moving device, the object moving device 41, and the like, and controls these operations.

  Next, a method for applying a paint to the object to be coated 50 using the coating film forming apparatus 1 according to the present embodiment will be described.

  First, a predetermined amount of paint is supplied to the paint supply apparatus connected to the spray gun 30. Further, in the painting booth 22, an object 50 for forming a coating film is fixed to a fixing jig 42 provided in the object moving device 41. Thereafter, by driving the coating film forming apparatus 1, the air conditioner 10, the temperature sensor, the humidity sensor, the spray gun 30, the article moving device 41, the spray gun moving device, the exhaust device, and the control device are operated.

  The air conditioner 10 supplies air to the air supply chamber 21 via the pipe 15. The control device controls the temperature and humidity of the air supplied by the air conditioner 10 to be substantially constant while feeding back output signals from a temperature sensor and a humidity sensor provided in the air supply chamber 21. The air thus adjusted in temperature and humidity is supplied to the coating booth 22 via the air supply filter 24.

  In a state where the temperature and humidity in the coating booth are constant, the paint gun is sprayed from the spray gun 30 and the coating object 50 is reciprocated so that partial overcoating is performed sequentially. The object to be coated 50 is moved to perform coating, and a coating film is formed on the object to be coated 50. The control method and operation of the object to be coated 50 and the spray gun 30 when forming the coating film will be described later.

  Excess paint atomized particles that have not been stacked on the object to be coated 50 ride on the air flow supplied from the air conditioner 10 and are sent to the exhaust chamber 23 side. At this time, the atomized particles of the paint are removed by the dust collecting filter 25. Further, the air passes through the dust collecting filter 25 and is sent to the exhaust chamber 23 and is discharged by the exhaust device.

  Below, the control method of the to-be-coated object 50 and the spray gun 30 and its operation | movement are demonstrated using the principal part sectional drawing of the coating booth 22 of FIG. First, as shown in FIG. 3 (a), at the start of coating, the control device controls the spray gun and the spray gun 31 so that the spray pattern 31 sprayed from a spray gun (not shown) and the object to be coated 50 are positioned away from each other. An object to be coated 50 is arranged. Then, in a state where the paint is sprayed from the spray gun, the partially moving coating is sequentially performed while operating the object moving device (not shown) to reciprocate the object 50 in the vertical direction of the figure. The article 50 is moved in the direction indicated by the arrow S. In the present embodiment, the control device sequentially moves the object 50 at a predetermined pitch in the direction of arrow S every time the forward and backward movements of the object 50 are finished, Is controlled to be overcoated.

  Next, as shown in FIGS. 3B and 3C, the object to be coated 50 is kept in a state in which the relative position between the object to be coated 50 and the spray gun is kept constant during the coating of the object to be coated 50. And the spray gun is shifted in a predetermined direction. In this embodiment, the shift movement direction of the article 50 and the spray gun is opposite to the movement direction (arrow S direction) for sequentially performing partial overcoating on the article 50. By shifting in this direction, the space required for painting can be minimized.

  Further, the timing of the shift movement is such that the center of the spray pattern 31 (corresponding to the spray center of the spray gun) is covered in the moving direction (arrow S direction) of the object 50 for sequentially performing partial overcoating. It is set so as to be performed when it is at a position approximately half the length of the coated object 50. By shifting at such timing, it is possible to minimize the space required for painting while securing a space for preventing the spray pattern 31 from soiling the inner wall 22a of the painting booth 22. Note that this timing may be in the middle of the object 50 being moved in the arrow S direction, or may be in the middle of the object being reciprocated.

  The shift movement amount of the object to be coated 50 and the spray gun is set within a range in which the spray pattern 31 of the paint sprayed from the spray gun does not stain the inner wall of the coating booth.

  Thereafter, as shown in FIG. 3 (d), while the object 50 is reciprocated, the object 50 is sequentially moved at a predetermined pitch in the direction indicated by the arrow S each time the forward and backward movements are completed. Continue painting. And as shown in FIG.3 (e), when the to-be-coated object 50 passes the inside of the spray pattern 31 completely, coating will be complete | finished.

  As described above, the coating film forming apparatus 1 according to the present embodiment allows the object to be coated 50 and the spray gun in a state where the relative position between the object to be coated 50 and the spray gun is kept constant during the coating of the object to be coated 50. Therefore, the space required for painting can be reduced while preventing the occurrence of misalignment in the overcoating position on the object to be coated 50.

  In addition, as a result of reducing the space required for painting, the painting booth 22 can be formed in a compact shape, so that the air conditioning energy necessary to keep the temperature and humidity of the painting booth 22 constant can be obtained. Can be reduced.

  Further, since the temperature and humidity of the coating booth 22 can be kept constant with a small amount of energy, a small air conditioner 10 with low air conditioning capability can be employed, and the coating film forming apparatus 1 can be made more compact. In addition, the equipment cost can be reduced.

  In addition, since the coating film forming apparatus 1 can be formed in a compact shape by making the coating booth 22 compact, the work efficiency of the installation work of the coating film forming apparatus 1 can be improved and the installation place is restricted. It becomes difficult to receive.

  In addition, since the spray pattern 31 of the paint sprayed from the spray gun controls the shift movement amount of the spray gun in a range that does not contaminate the inner wall 22a of the coating booth 22, there is no fear that the paint adheres to the inner wall 22a, and cleaning is performed. It is possible to reduce the process required for maintenance, etc., and improve the work efficiency of painting.

  As mentioned above, although one Embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment. For example, the operation of the spray gun moving device may be controlled so that the spray gun 30 is synchronously reciprocated in a direction opposite to the reciprocating direction of the object 50 to be reciprocated. Hereinafter, the operations of the object to be coated 50 and the spray gun 30 when such a control method is employed will be described in detail with reference to FIG.

  First, at the start of coating, as shown in FIG. 4 (a), the control device causes the spray pattern 31 sprayed from the spray gun and the target object 50 to be positioned away from each other. Place 50 and spray gun. Then, in a state where the paint is sprayed from the spray gun, the object moving device (not shown) is operated to move the object 50 in the direction indicated by the arrow H, and the spray gun moving device is operated to form the spray pattern 31. The spray gun is moved to move in the direction opposite to the arrow H direction (arrow I direction).

  When the forward movement of the object to be coated 50 is finished, the forward movement of the spray gun is also finished, and the object to be coated is placed at a position where the paint of the spray pattern 31 is not applied to the object to be coated 50 as shown in FIG. The movement of the object moving device and the spray gun is controlled. Next, the workpiece 50 is moved in the arrow S direction by a predetermined pitch. And as shown in FIG.4 (c), while moving the to-be-coated object 50, the spray gun is also moved back and the spray pattern 31 is moved to the arrow J direction. By repeating such an operation, the coating is advanced. A uniform coating film can be formed by keeping the relative speed between the spray gun and the object to be coated 50 constant.

  Next, as shown in FIG. 4D and FIG. 4E, during the coating of the object 50, the object 50 is kept in a state where the relative position between the object 50 and the spray gun is kept constant. And the spray gun is shifted in a predetermined direction (the direction opposite to the arrow S direction).

  Thereafter, as shown in FIGS. 4 (f) and 4 (g), the forward and backward movements of the object 50 are completed while the object 50 and the spray gun are synchronously reciprocated in opposite directions. Each time the coating object 50 is sequentially moved at a predetermined pitch in the arrow S direction, the overcoating of the paint is continued. And as shown in FIG.4 (h), coating is complete | finished when the to-be-coated object 50 which is performing reciprocating motion has completely passed through the spray pattern 31.

  In this way, by performing the coating while the object 50 and the spray gun are synchronously reciprocating in opposite directions, the coating 50 is moved between the forward movement start position and the forward movement end position. Since the distance can be shortened, the space required for painting in the direction of the reciprocating motion of the article 50 can be further reduced.

  In the present embodiment, the shift movement direction of the object to be coated 50 and the spray gun 30 is the direction opposite to the arrow S direction, but is particularly limited as long as the space required for painting can be reduced. Not.

  Further, in the present embodiment, when the center of the spray pattern 31 is at a position that is substantially half the length of the object 50 in the direction of the arrow S, the object 50 and the spray gun 30 are shifted. However, it is not particularly limited to such timing.

  In the present embodiment, as shown in FIG. 3C, the control device operates the workpiece moving device and the spray gun moving device so as to shift the workpiece 50 and the spray gun 30 once. However, the number of shift movements is not limited to one. For example, the object 50 and the spray gun 30 may be controlled to be shifted a plurality of times.

  In the present embodiment, as shown in FIG. 3, the control device sequentially moves the workpiece 50 at a predetermined pitch in the arrow S direction every time the forward and backward movements of the workpiece 50 are completed. The operation of the object 50 is controlled so that the object 50 is reciprocated. For example, the object 50 is reciprocated, and the object 50 is moved at a predetermined constant speed in the arrow S direction. Also good.

  Moreover, in the coating film formation apparatus 1 in this embodiment, the atomization particle diameter, atomization particle density | concentration, and atomization particle velocity in the spray pattern of the coating material sprayed from the spray gun 30 are controlled as shown below. At the same time, by controlling the relative movement between the spray gun 30 and the object to be coated 50, it is possible to efficiently form a coating film having a finish substantially equivalent to the finish under the painting conditions in the actual painting process. .

  First, the control method of the atomization particle diameter of the atomization particle in the spray pattern of the coating sprayed from the spray gun 30, the atomization particle density | concentration, and the atomization particle speed is demonstrated. The atomized particle diameter is an average particle diameter at the time when the particle group of the atomized particles of the paint atomized (atomized) by the spray gun 30 reaches the surface of the object to be coated 50. For example, it can be measured by a laser diffraction type particle size distribution measuring device or the like. The atomized particle concentration means the total volume of all particles passing through the unit area of the spray pattern, and simply, the average atomized particle concentration calculated from the paint discharge flow rate with respect to the spray pattern area. Can be estimated as The pattern area can be easily obtained by spraying a spray pattern on a plate or the like. The atomized particle velocity is an average particle velocity in the direction of the object to be coated 50 when the atomized particles reach the surface of the object to be coated 50, for example, Doppler laser particle velocity measurement. It can be measured by a device or the like.

When using a rotating bell type atomizing coating machine as the spray gun 30, the atomizing particle size is selected by appropriately selecting the bell cup diameter of the rotating bell type atomizing coating machine, the number of rotations of the bell and the discharge flow rate of the paint. By doing, it can control easily so that it may become substantially equivalent to the atomization particle diameter in an actual coating process. The number of bell rotations can be adjusted by changing the air pressure for rotating the bell of the rotating bell type atomizing coating machine. The paint discharge flow rate can be adjusted by changing the discharge flow rate of the paint supply device. Can do. Usually, a rotating bell type atomizing coating machine used in an actual coating process is used with a bell cup diameter of about 60 mmφ to 70 mmφ, a rotation speed of 20000 to 30000 rpm, and a discharge flow rate of 200 to 300 cm ³ / min. In general, in the present embodiment, when a small bell cup is used, atomization with a small discharge flow rate of about 20 to 30 cm ³ / min and a rotational speed of about 10,000 rpm is substantially equivalent to the actual coating process. The particle size can be reproduced.

  Moreover, when using an air atomization type coating machine as the spray gun 30, by adjusting the atomization air flow rate and the coating material discharge flow rate as appropriate, the atomization particle diameter in the actual painting process is substantially the same. Can be easily determined. The atomizing air flow rate can be adjusted by restricting the outflow air.

The atomized particle concentration is simply calculated from the discharge flow rate of the paint with respect to the pattern area formed on the object 50 by the spray pattern sprayed by the spray gun 30. Therefore, by adjusting the discharge flow rate of the paint, it is possible to easily determine a concentration substantially equal to the atomized particle concentration in the actual painting process. For example, when the pattern width of the actual scale is 30 cm and the discharge flow rate is 200 cm ³ / min, in this embodiment, if the pattern width is 10 cm, the pattern area ratio is 1/9. An equivalent atomized particle concentration can be obtained at 2 cm ³ / min (200 × (1/9)). In addition, the pattern width of the spray pattern can be easily changed by adjusting the ejection angle and flow rate of the shaping air of the rotary bell type atomizing coating machine.

  The atomization particle speed is determined by appropriately adjusting the shaping air flow rate, the coating distance, and the like of the rotating bell type atomizing coating machine when the rotating bell type atomizing coating machine is used as the spray gun 30. The value can be easily determined to be approximately the same as the atomized particle velocity at. In addition, when using an air atomization type coating machine as the spray gun 30, it is easy to adjust the atomizing air flow rate and the coating distance appropriately to a value substantially equal to the atomized particle velocity in the actual coating process. Can be controlled.

  Thus, the atomization state (atomization particle diameter, atomization particle density | concentration, and atomization particle speed) of the coating material laminated | stacked on the to-be-coated object 50 by adjusting the discharge flow rate of the coating material in the spray gun 30, a coating distance, etc. Can be substantially matched with those in the actual painting process.

  Next, a method for controlling the relative movement between the spray gun 30 and the workpiece 50 will be described. Specifically, the relative relationship between the spray gun 30 and the object to be coated 50 is based on the coating film formation profile determined by the relationship between the coating film formation time in the actual coating process and the change in the coating film thickness. Control movement.

  First, the coating film formation profile in an actual painting process is demonstrated below using FIG.5 and FIG.6. FIG. 5 is an explanatory diagram showing a trajectory of the spray gun 100 in an actual painting process in a certain small area portion 103 on the object 101 to be coated, and FIG. It is explanatory drawing which shows the relationship with thickness.

  In FIG. 5, a spray gun 100 is attached to a vertical reciprocator 102 and sprays paint onto the surface of an object to be coated. In this example, the spray gun 100 passes through a certain small area portion 103 on the object 101 to be coated, and the spray pattern is applied seven times to form a coating film. .

  The atomization particle accumulation time TF when the spray gun 100 passes through the minute area portion 103 once can be calculated from (passing distance L1 / reciprocating speed of the minute area portion 103). The rotating bell type atomizing coating machine 100 is reciprocated in addition to the minute area portion 103, and the time for passing through the portion other than the minute area portion 103, that is, from the passage of the minute area portion 103 to the next passage. The interval time TI can be calculated from ((reciprocation width L2−passing distance L1 of the minute area portion 103) / reciprocation speed). Therefore, when the horizontal axis is the coating film formation time and the vertical axis is the film thickness, a coating film forming profile as shown in FIG. 6 can be obtained. The film thickness can be measured by, for example, an electromagnetic film thickness meter or a laser displacement meter. In FIG. 6, the deposited film is schematically represented by a straight line, but in actuality, the deposited film is deposited logistically.

  The control device controls the object moving device 41 so as to reproduce the coating film forming profile determined by the relationship between the coating film forming time and the change in the film thickness of the coating film in the actual coating process. That is, to match the coating film formation profile in the actual painting process, the passage time, the number of times of passage of the object to be coated 50 passing through the spray pattern of the paint sprayed by the spray gun 30, and the time from the completion of the passage to the start of the next passage The object moving device 41 is controlled by the interval time TI. In addition, in the interval time TI, the article moving device 41 stops or moves the object 50 in an arbitrary area in the painting booth where the atomized particles of the paint are not stacked on the object 50. Thus, the atomization particles of the paint are controlled not to be stacked on the object to be coated 50.

  Thereby, the method of depositing (stacking film behavior) of the atomized particles of the paint sprayed by the spray gun 30 onto the object to be coated 50 can be made substantially coincident with the deposited film behavior in the actual coating process.

  In addition, when the actual painting process is a two-stage painting in which painting is performed on the object to be painted and then the painting is performed again, as shown in the coating film formation profile in FIG. A flash time during which painting is not performed is provided until the start of painting at the 2nd stage. Thus, in the case where two times of overcoating are performed in the actual painting process and a flash time is provided, the rotation bell type fog is appropriately changed by appropriately changing the interval time T1 at the timing when the flash time is set. The way in which the atomized particles of the paint sprayed by the chemical coating machine 30 are piled on the object to be coated 50 (stacked film behavior) can be substantially matched with the deposited film behavior in the actual coating process.

  In addition, even in the case of a multi-stage coating process in which coating is performed on an object to be coated three or more times, the interval time at the timing when a plurality of flash times are set as described above What is necessary is just to change T1 suitably.

  Thus, the temperature and humidity of the air in the coating booth 22, the atomization particle diameter of the atomized particles of the paint sprayed from the spray gun 30, the atomized particle concentration and the atomized particle velocity, and the object to be coated 50 It is possible to reproduce the coating conditions in the actual painting process by controlling the film deposition behavior of the atomized particles laminated on the coating surface of the paint so that it is substantially equivalent to that in the actual painting process. A coating film having a finish substantially equivalent to the finish of the coating film in the coating step can be formed.

It is a section schematic lineblock diagram of a coat formation device concerning one embodiment of the present invention. It is XX sectional drawing of FIG. It is principal part sectional drawing for demonstrating the operation | movement of a to-be-painted object and a spray gun. It is principal part sectional drawing for demonstrating the action | operation of the coating-film formation apparatus which concerns on other embodiment of this invention. It is explanatory drawing which shows the locus | trajectory on the to-be-coated object of the coating machine in an actual coating process. It is explanatory drawing explaining the coating-film formation profile in an actual painting process. It is explanatory drawing for demonstrating the coating method at the time of using the conventional coating-film formation apparatus. It is explanatory drawing for demonstrating the coating method at the time of using the other conventional coating-film formation apparatus. Explanatory drawing explaining the other coating-film formation profile in an actual painting process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coating film formation apparatus 10 Air conditioning apparatus 15 Piping 20 Coating apparatus main body 21 Air supply chamber 22 Coating booth 23 Exhaust chamber 24 Air supply filter 25 Dust collection filter 30 Spray gun 40 Storage part 41 Object moving apparatus 42 Fixing jig 50 Objects to be painted

Claims (4)

An object moving device for moving an object to be coated;
A spray gun moving device for moving a spray gun for spraying paint;
A control device for controlling the operation of the object moving device, the spray gun and the spray gun moving device;
The control device is a coating film forming device that moves in a certain direction so that partial overcoating is sequentially performed while reciprocating the object to be coated in a state where the paint is sprayed from the spray gun,
The control device is a coating film forming apparatus that shifts the object to be coated and the spray gun while the relative position between the object to be coated and the spray gun is kept constant during the coating of the object to be coated.   The coating film forming apparatus according to claim 1, wherein a shift movement direction of the object to be coated and the spray gun is a direction opposite to a movement direction of the object to be coated for sequentially performing partial overcoating.   3. The coating according to claim 2, wherein the shift movement of the object to be coated and the spray gun is performed when the spray center of the spray gun is at a position that is substantially half the length of the object to be coated in the moving direction. Film forming device.   The coating film forming apparatus according to claim 1, wherein the control device causes the spray gun to reciprocate synchronously in a direction opposite to the reciprocating direction with respect to the reciprocating motion of the object to be coated.