KR100918835B1 - Film forming equipment - Google Patents

Abstract

The present invention provides a film forming apparatus capable of reducing the space required for painting. The film forming apparatus includes a workpiece conveyor for moving the workpiece 50; A spray gun conveyor 41 for moving a spray gun for spraying paint; And a controller for controlling the operation of the workpiece conveyor, the spray gun, and the spray gun conveyor, wherein the controller is sprayed with the paint sprayed from the spray gun 30 such that a sequential partial coating is performed. The painting 50 also reciprocates and moves in a predetermined direction, and during the painting, the controller 50 maintains a relative position between the painting and the spray gun while painting the painting 50. And the spray gun 30 is shifted.

Coating film forming apparatus, main body of coating equipment, coating, spray gun, coating conveyor

Description

Coating Film Forming Equipment {FILM FORMING EQUIPMENT}

The present invention relates to a film forming apparatus.

Background Art Conventionally, a coating method using a spray pattern formed by paint sprayed from a spray gun has been used to apply a uniform thickness to a workpiece. Layer coating is performed, for example, in the manner of FIG. 7 using a film forming apparatus including an air conditioner, spray gun, and the like. That is, the paint is sprayed from the spray gun fixed to the center of the paint booth 151 and the coated object 152 disposed below the spray gun is moved up and down at a predetermined speed by a coated conveyor (not shown). The spray pattern 153 is formed by horizontally moving in the arrow S direction (that is, from left to right in the drawing) while moving.

As shown in FIG. 8, spray the paint on the coating object 152 fixed to the center of the painting process booth 151 using the spray gun located on the workpiece 152, and spray the spray gun at a predetermined speed in the vertical direction. It is also possible to perform the overcoat by forming the spray pattern 153 by transversely moving in the arrow S direction (that is, from left to right in the drawing) by a predetermined distance while moving to.

When the overcoat is performed while the spray gun is fixed while the spray gun is fixed, as described above, the overcoat is initiated at a position away from the spray pattern, and the coated object is applied to the spray pattern. It must continue until it passes completely. That is, an excessive space for painting, that is, a space of (coated length x 2 + spray pattern width) x (width of coated object x 2 + spray pattern width) is required at the time of painting.

Similarly, if the overcoat is performed while fixing the workpiece and moving the spray gun, the overcoat is initiated at a position where the spray pattern is away from the workpiece and continues until the spray pattern has completely passed through the workpiece. Should be. That is, an excessive amount of coating space, i.e., (length of coating + spray pattern width x 2) x (width of coating + spray pattern width x 2) is required for painting. In addition, when painting is done in this manner, it is necessary to provide an extra space between the spray boot pattern and the inner wall of the coating booth to prevent the spray pattern from contaminating the painting booth, thus requiring more space. .

Excessive space requirement for painting is constraining the place where the film forming apparatus can be installed and a large amount of energy is required to control the air in the coating booth.

The present invention has been made to solve this problem, and provides a film forming apparatus capable of realizing a reduction in the space required for painting.

An object of the present invention is a workpiece conveyor for moving the workpiece; A spray gun conveyor for moving a spray gun for spraying paint; And a controller for controlling the operation of the workpiece conveyor, the spray gun, and the spray gun conveyor, wherein the controller reciprocates the workpiece while the paint is sprayed from the spray gun to perform sequential partial overcoating. While moving the movement in a predetermined direction, the controller shifts the coating object and the spray gun while the relative position between the coating object and the spray gun is kept constant during painting the workpiece. It can be achieved by the film forming apparatus characterized in that.

In the present film forming apparatus, it is preferable that the direction in which the to-be-painted object and the spray gun are shifted in the opposite direction to the moving direction of the to-be-painted object to which the partial coating is performed.

In addition, the shift of the coating object and the spray gun is preferably performed when the center of the spray ejected from the spray gun is located approximately in the middle of the length of the coating object in the shift direction.

It is also preferable that the controller reciprocates the spray gun in a manner synchronized with the reciprocating direction of the workpiece.

The present invention can provide a film forming apparatus capable of realizing a reduction in the space required for painting.

1 shows a film forming apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line X-X of FIG.

Fig. 3 is a sectional view showing the principal parts explaining movement of the workpiece and the spray gun.

Fig. 4 is a sectional view showing the principal parts of the film forming apparatus in accordance with another embodiment of the present invention.

5 is an explanatory view showing the path of the coating device for the object to be painted in the actual painting process.

6 is an explanatory diagram of a coating film formation profile painted in an actual coating process.

7 is an explanatory view of a coating method in which a conventional film forming apparatus is used.

8 is an explanatory diagram of a coating method using another conventional film forming apparatus.

9 is an explanatory diagram of another coating film formation profile coated in an actual coating step.

* Explanation of symbols for main parts of the drawings

1. Coating film forming device 10. Air conditioning system

15. Piping 20. Painting Body

21. Air supply chamber 22. Paint booth

23. Exhaust chamber 24. Air supply filter

25. Dust collecting filter 30. Spray gun

40. Containment 41. Painted Conveyor

42. Fixtures 50. Workpiece

Hereinafter, the film forming apparatus of the present invention will be described with reference to the accompanying drawings. 1 is a cross-sectional view schematically showing the structure of a film forming apparatus according to an embodiment of the present invention. FIG. 2 is a sectional view taken along the line X-X of FIG.

As shown in Fig. 1, the film forming apparatus 1 includes an air conditioning system 10, a pipe 15, a painting apparatus main body 20, a conveyor containment member 40 and a controller (not shown). The air conditioning system 10 supplies air having a temperature and humidity controlled to the painting apparatus main body 20 so that the air conditioning system 10 communicates with the painting apparatus main body 20 and the pipe 15 at the top.

The painting device main body 20 is divided into the air supply chamber 21, the painting booth 22, the exhaust chamber 23 from the top to the bottom, the air supply chamber 21 and the painting booth 22 is supplied to the air supply filter 24 The paint booth 22 and the exhaust chamber 23 are separated from each other by the dust collecting filter 25.

The air supply chamber 21 includes a temperature detector and a humidity detector (not shown) for detecting temperature and humidity. Examples of temperature detectors are temperature sensors such as thermistors and thermocouples. Humidity sensor devices such as polymer film humidity sensor, ceramic humidity sensor and electrolyte humidity sensor can be used as humidity detector.

The paint booth 22 includes a spray gun 30 that functions as a paint sprayer. Spray gun conveyor, paint supply, air control panel, high voltage generator, cable (not shown) is connected to the spray gun (30). Spray gun 30 is configured such that the distance from the workpiece 50 can be changed.

A rotation bell-type spray painter, an air spray painter, or the like may be used as the spray gun 30. Rotating bell spray coating device includes a bell cup that rotates at high speed at the tip of the paint gun. And the paint discharged through the bell cup is sprayed by the centrifugal force generated by the rotation of the bell cup. Rotating bell-type spray coating device includes a shaping air blowing air nozzle for controlling the width of the paint spray pattern by adjusting the scattering direction of the paint spray particles scattered radially outward from the outer peripheral end of the bell cup. . The air spray coating device includes a nozzle in the vicinity of a paint discharge port for ejecting compressed air (sprayed air), and sprays the paint by ejecting the paint from the discharge port while ejecting the compressed air from the nozzle. An air spray coating apparatus typically includes a pattern air nozzle around a compressed air nozzle to control the spray pattern width.

The spray gun conveyor (not shown) is a device for moving the spray gun 30 in response to a command from a controller to be described later. Air cylinders, twin-axial actuators and the like are examples of spray gun conveyors. An example of a paint feeder is a syringe pump, which is supplied by a micro actuator that presses the piston of a syringe filled with a certain amount of paint. The air control panel controls the air pressure for rotating the bell, the flow rate of the shaping air, and other conditions of the rotating bell type spray coating system. The high voltage generator applies the atomized atomized particles produced by the atomizer to the workpiece 50 using static electricity.

The exhaust chamber 23 includes an exhaust device (not shown) for exhausting air supplied by the air conditioning system 10.

As shown in the cross-sectional view of FIG. 2, the containment member 40 is disposed adjacent to the painting booth 22 and includes a conveyor 41 for conveying the workpiece 50. A space 44 of a predetermined size is formed in the lower portion of the partition 43 that separates the containment member 40 from the painting booth 22. The conveyor 41 includes a fixing jig 42 for fixing the workpiece 50 in the painting booth 22 through the space 44. As long as the conveyor 41 can freely move the workpiece 50 on one side in the painting booth 22, a single-axis actuator, a twin-axis actuator, or the like can be used as the conveyor 41. In this embodiment, a twin-axial actuator is used as the conveyor 41.

The controller is connected to the air conditioning system 10, temperature sensor, humidity sensor, spray gun 30, spray gun conveyor, the workpiece conveyor 41 and the like to control the operation.

A method of forming a coating film on the object to be coated 50 using the coating film forming apparatus 1 of this embodiment is described below.

Initially, a predetermined amount of paint is supplied to the paint feeder provided in the spray gun 30.

The workpiece 50 is then attached to a conveyor jig 42 provided on the conveyor 41 in the painting booth 22. By operating the film forming apparatus 1, the air conditioning system 10, the temperature sensor, the humidity sensor, the spray gun 30, the workpiece conveyor 41, the spray gun conveyor, the exhaust system and the controller are operated.

The air conditioning system 10 supplies air to the air supply chamber 21 through a pipe 15. While feeding back the signal output from the temperature detector and the humidity detector provided in the air supply chamber 21, the controller adjusts the temperature and humidity of the air supplied from the air conditioning system 10 to be substantially constant. The air whose temperature and humidity are adjusted is sent to the coating booth 22 through the air supply filter 24.

The coating film is formed by spraying the coating material 50 from the spray gun 30 under the condition that the temperature and humidity in the painting booth are constantly controlled and reciprocating the coating material 50 while moving the coating material 50 in a predetermined direction. Partial overcoat is performed sequentially. The method and operation of controlling the object 50 and the spray gun 30 while forming the coating film will be described later.

The excess paint spray particles which are not laminated on the workpiece are loaded in the air wind supplied from the air conditioning system 10 and sent to the exhaust chamber 23. In this process, the paint spray particles are removed by the dust collecting filter 25. Air passing through the dust collecting filter 25 is blown to the exhaust chamber 23 and discharged through the exhaust device.

The control method and operation of the workpiece 50 and the spray gun 30 will be described later with reference to the cross-sectional view of the main part of the painting booth 22 of FIG. When painting is started, the controller controls the spray gun (not shown) and the workpiece 50 to isolate the spray pattern 31 sprayed from the spray gun and the workpiece as shown in FIG. 3 (a). Adjust to arrange. During spraying the paint in the spray gun, the workpiece 50 (not shown) is operated so that the workpiece 50 moves up and down and is shifted along the arrow S direction so that the partial overcoat is performed sequentially. In this embodiment, each time the half cycle of the reciprocating motion is completed, the controller shifts the workpiece 50 in the direction of arrow S by a predetermined distance to apply the painting on the workpiece 50.

Second, as shown in (b) and (c) of FIG. 3, the coating object is maintained while maintaining the relative position of the coating material 50 with respect to the spray gun during the painting process of the coating material 50. 50 and the spray gun are shifted in a predetermined direction. In this embodiment, the shift direction is opposite to the arrow S direction when the partial overcoat process is performed on the to-be-painted article 50 sequentially. The space required for painting can be reduced by shifting the workpiece 50 in this direction.

The shift timing is approximately equal to the center of the spray pattern 31 (corresponding to the spray center ejected from the spray gun) in order to sequentially perform partial repainting in the shift direction (arrow S direction) of the workpiece 50. The workpiece 50 is set to shift when it is about halfway in length. By shifting the workpiece at this timing, sufficient space is ensured to prevent the spray pattern 31 from contaminating the inner surface 22a of the painting booth 22 and reducing the space required for the painting process. The shift timing may be when the workpiece 50 proceeds in the direction of arrow S, or when the workpiece 50 reciprocates.

The shift amount of the to-be-painted object 50 and the spray gun is set so that the spray pattern 31 of the paint sprayed from the spray gun may not contaminate the inner surface of the coating booth.

Subsequently, as shown in FIG. 3 (d), while the reciprocating motion of the workpiece 50 is performed, each time the half cycle of the reciprocating motion is completed, the workpiece 50 is moved by a predetermined distance. By shifting in the direction, the overcoat is performed on the workpiece 50. The painting process is completed when the workpiece 50 has completely passed through the spray pattern 31 as shown in Fig. 3E.

As described above, the coating film forming apparatus of the present embodiment may be maintained so that the relative position of the workpiece 50 and the spray gun can be kept constant and the workpiece 50 and the spray gun can be shifted while painting the workpiece. 1) is configured. By doing so, it is possible to reduce the space required for painting and to prevent misalignment of the painting to be coated 50.

In addition, the coating booth 22 may be minimized due to the space required for the painting process, thereby reducing the energy required to maintain the temperature and humidity in the painting booth 22 in a predetermined condition.

Since the temperature and humidity in the paint booth 22 can be kept constant even with the reduced energy, a small capacity air conditioning system can be used. By doing so, the film forming apparatus 1 can be further minimized and the installation cost can be reduced.

Minimization of the coating booth 22 minimizes the film forming apparatus 1 as a whole, thereby improving the process efficiency of installing the film forming apparatus 1, and alleviating the constraints of the place where the film forming apparatus can be installed.

A shift amount of the spray gun is determined within a range in which the spray pattern 31 of the paint sprayed from the spray gun does not contaminate the inner surface 22a of the paint booth 22. There is no risk of paint adhering to the inner surface 22a, which reduces the cleaning or other maintenance procedures, thereby increasing the painting process efficiency.

Although one embodiment of the present invention has been described above, the scope of the present invention is not limited thereto. For example, it is also possible to control the spray gun conveyor operation so that the spray gun reciprocates in a manner synchronized in the reverse direction to the traveling direction of the workpiece 50. When this control method is used, the operation of the object 50 and the spray gun 30 will be described later with reference to FIG.

When painting is started, the controller adjusts the coating 50 and the spray gun to spray the spray pattern 31 and the coating 50 sprayed from the spray gun as shown in FIG. Keep them separate from each other. When spraying the paint from the spray gun, a workpiece conveyor (not shown) is operated, and the workpiece 50 is shifted in the direction of arrow H. FIG. The spray gun conveyor is operated to shift the spray gun 31 so that the spray pattern 31 is shifted in the opposite direction to the direction indicated by the arrow H (that is, the direction indicated by the arrow I).

Adjusting the operation of the workpiece conveyor and the spray gun so that when the first half cycle of the reciprocating motion of the workpiece 50 is completed, the first half cycle of the reciprocating motion of the spray gun is also completed, FIG. 4 (b). As shown, the position of the workpiece conveyor and spray gun is such that the paint in the spray pattern 31 is in a position where the paint 50 will not be applied to the workpiece 50. The workpiece 50 is then shifted in the direction of arrow S by a predetermined distance. As shown in Fig. 4 (c), the workpiece 50 is moved during the second half cycle of the reciprocation, the spray gun is also moved during the second half cycle of the reciprocation, and the spray pattern 31 is indicated by arrow J. Is shifted in the direction. The painting process proceeds by repeating this operation. By making the relative velocity between the spray gun and the workpiece 50 constant, a coating film of uniform thickness can be formed.

As shown in Figs. 4 (d) and 4 (e), while painting the work piece 50, the work piece may be kept with the relative position of the work piece 50 with respect to the spray gun. 50) and the spray gun are shifted in a predetermined direction (i.e., the reverse direction of arrow S).

Then, as shown in FIGS. 4 (f) and 4 (g), the reciprocating motion of the workpiece 50 is carried out while reciprocating the workpiece 50 and the spray gun in a mutually synchronized manner in a reverse direction. Each time the first half cycle and the second half cycle are completed, the painting 50 is sequentially shifted in the arrow S direction by a predetermined distance, and the overcoat process is continued. As shown in Fig. 4 (h), the coating process is completed when the reciprocating workpiece 50 completely exits through the spray pattern 31.

As mentioned above, by carrying out the painting process while reciprocating the spray gun and the workpiece 50 in a mutually synchronized way, the distance between the reciprocating start and end positions of the workpiece 50 is reduced. Can be reduced. In this way, the workpiece

It is possible to further reduce the space required for painting in the direction of the reciprocating motion of (50).

In this embodiment, the shift direction of the to-be-painted object 50 and the spray gun 30 is opposite to the arrow S direction, but the direction is not limited to this as long as the space required for painting can be reduced.

In this embodiment, when the center of the spray pattern 31 sprayed from the spray gun 30 is located about halfway in the length of the workpiece 50 in the arrow S direction, the spray gun 30 and the blood The shift of the stow goods 50 is performed. However, the shift timing is not limited to this.

As shown in Fig. 3 (c), in this embodiment, the controller controls the operation of the workpiece conveyor and the spray gun conveyor so that the workpiece 50 and the spray gun 30 are shifted at once. However, the number of shifting is not limited to one time, and the work 50 and the spray gun 30 may be operated by shifting several times.

In addition, in the present embodiment, the controller 50 is configured such that the workpiece 50 is sequentially shifted in the arrow S direction at the end of each half cycle of the reciprocation of the workpiece 50 as shown in FIG. 3. Control the operation of However, it is also possible to control the workpiece 50 to be shifted at a constant speed in the direction of the arrow S while reciprocating the workpiece 50.

In the film forming apparatus 1 of the present invention, the speed, the concentration, the diameter of the spray particles in the spray pattern of the paint sprayed from the spray gun 30 and the relative shift of the spray gun 30 with respect to the workpiece 50 are determined. By controlling, it is possible to effectively form a high quality coating film such as that which has been coated under the coating conditions of the actual coating process.

A method of controlling the diameter, the concentration, and the velocity of the spray particles in the spray pattern of the paint sprayed from the spray gun is described below. The paint spray particle diameter size is the average diameter of the particles in the spray particle group measured when the spray particles sprayed by the spray gun 30 approach the coating 50. Particle diameters can be measured with a laser diffraction particle size analyzer. Spray particle concentration is the total volume of particles passing through the unit area of the spray pattern. In a simple way, the spray particle concentration can be obtained from the average spray particle concentration calculated from the flow rate of the paint divided by the spray pattern area. The pattern area can be easily obtained by spraying a spray pattern on the plate. The spray particle velocity is the average particle velocity of the particle group in the direction of the object to be coated 50 when the sprayed particles reach the object to be coated 50. Spray particle velocity can be measured, for example, with a laser Doppler tachometer or the like.

When the rotary bell type spray paint apparatus is used as the spray gun 30, the particle diameter can be easily determined by appropriately selecting the bell cup diameter, the bell rotation speed, the flow rate of the paint, etc. of the rotary bell type spray paint apparatus, so that the particle diameter The diameter is substantially the same as the particle diameter in the actual painting process. The rotational speed of the bell can be controlled, for example, by varying the air pressure for rotating the bell of the rotary bell spray coating device 30. The paint flow rate can be controlled by changing the flow rate of the paint feeder. Rotating bell type spray coating apparatus generally used in the actual coating process has a bell cup diameter of about 60 mm Φ to 70 mm Φ, the rotation speed is 20000 to 30000 rpm and the flow rate is 200 cm 3 / min to 300 cm 3 / min. However, when a small bell cup is used in this embodiment, it is possible to obtain a spray particle diameter almost equal to the actual coating process at a small flow rate of 20 cm 3 / min to 30 cm 3 / min and at a rotation speed of 10000 rpm. .

When the air spray coating device is used as the spray gun 30, by appropriately selecting the spray air flow rate and the flow rate of the paint, it is possible to easily determine a particle diameter almost equal to the particle diameter in the actual coating process. . The atomized air flow rate can be easily controlled by reducing the amount of discharged air or the like.

The spray particle concentration can be easily calculated based on the flow rate of the paint related to the pattern area formed on the workpiece 50 by the spray pattern sprayed by the spray gun 30. Therefore, the spray particle concentration nearly equivalent to that in the actual coating process can be easily obtained by controlling the paint flow rate. For example, if the coating pattern width of this embodiment is set to 10 cm when the coating pattern width is 30 cm and the flow rate is 200 cm 3 / min in the actual process, the pattern area ratio of this embodiment to the actual process is 1/9. Therefore, the same spray particle concentration can be obtained by setting the flow rate to 22.2 cm 3 / min (200 × (1/9)). Note that the spray pattern width can be easily changed by controlling the angle and flow rate of the shaping air sprayed from the rotating bell type spray paint apparatus.

The spray particle velocity is substantially equal to the spray particle velocity in the actual painting process by appropriately selecting the shaping air flow rate and the coating distance of the rotating bell spray spray apparatus when the rotating bell spray spray apparatus is used as the spray gun 30. The same value can be easily determined. When an air spray coating device is used as the spray gun 30, by appropriately selecting the spray air flow rate and the paint distance, the spray particle speed can be easily determined to be substantially equivalent to the spray particle speed in the actual painting process. Note that

As mentioned above, the spray conditions (particle diameter, concentration, spray particle velocity) of the paint are controlled on the paint 50 in the actual coating process by controlling the paint flow rate and the paint distance of the spray gun 30. It is possible to make it almost identical to the spraying condition of.

A method of controlling the relative movement between the spray gun 30 and the workpiece 50 will be described later. Specifically, the relative movement of the spray gun 30 and the coated object 50 is controlled based on the coating film formation profile determined according to the change relationship between the coating film formation time and the coating film thickness in the actual coating process.

The film forming profile in the actual coating process will be described below with reference to FIGS. 5 and 6. FIG. 5 is an explanatory diagram showing a path of the spray gun 100 over the micro area portion 103 of the object to be coated 101 in the actual painting process. 6 is an explanatory diagram showing the relationship between the elapsed time and the coating film thickness in the micro area.

In FIG. 5, the spray gun 100 is attached to the vertical reciprocating member 102, and the paint is sprayed onto the workpiece to be painted. In this embodiment, as the spray gun 100 passes through the micro-area portion 103 of the object to be coated seven times, it is shown that the spray pattern is coated seven times to form a coating film.

When the spray gun 100 passes through the small area portion 103 once, the floating time (TF) of the spray particles is calculated by dividing the passage length L1 of the small area portion 103 by the reciprocating speed. Can be. The spray gun 100 also reciprocates in these other parts besides the micro area 103. The time that the rotary bell type spray coating device 100 passes other than the small area portion 103, that is, the interval time from the completion of the painting passage in the small area portion 103 to the subsequent painting passage is "TI = ( Reciprocating width L2-microarea portion 103 L1) / reciprocating speed " Therefore, the film formation profile shown in Fig. 6 can be obtained from the horizontal axis indicating the film formation time and the vertical axis indicating the film thickness. The film thickness can be measured with an electromagnetic film thickness meter and a laser displacement meter. In Fig. 6, the film thickness is shown as a straight line, but the coating film is laminated based on a logic function in the actual coating process.

The controller adjusts the workpiece conveyor 41 to produce a film formation profile that is determined by the relationship between the film thickness and the change in film formation time. That is, according to the interval time TI between the completion of the painting pass of one process and the start of the subsequent painting passage in the spray pattern of the paint sprayed from the spray gun 30, and the number of passes of the to-be-coated article 50, The conveyor 41 is controlled so that these elements coincide with those elements of the film forming profile in the actual painting process. The sprayed paint particles are prevented from being deposited on the workpiece 50 by stopping the workpiece 50 during the interval time TI or by moving the workpiece into any area within the paint booth where the spray spray particles will not be deposited. Note that the paint conveyor 41 is controlled.

In this way, the lamination (coating layer stacking behavior) on the coated object of the spray coating particles sprayed from the spray gun 30 becomes substantially the same as the film laminating behavior in the actual coating process.

In the case where the actual coating process is performed by two stages of painting, i.e., the coating is applied immediately after the painting is executed, as shown in the film forming profile of FIG. 9, no painting process is performed. A flash time is provided between the first stage painting completion and the second stage painting start. When the actual coating process is executed by two painting methods with one flash time, the paint spray particles sprayed from the rotary bell type spray coating device 30 are applied by appropriately setting the interval time TI to correspond to the timing of the flash time. The lamination (film lamination behavior) on the stowable article 50 can be made substantially the same as the lamination behavior in an actual coating process.

Even in multi-stage coating, in which paint is to be coated three or more times on the workpiece, by appropriately setting the interval time TI in this manner corresponding to a plurality of flash times, the lamination substantially the same as the coating lamination behavior in the actual painting process. It is possible to make a behavior.

As described above, the air temperature and humidity in the paint booth 22 are controlled, the particle diameter, the concentration and the paint spray particle velocity sprayed from the spray gun are controlled, and they are substantially the same as the coating lamination behavior in the actual painting process. By controlling the behavior in which the spray particles are laminated on the coated object 50, the coating film forming apparatus 1 of this embodiment can reproduce the coating conditions in the actual coating process. Therefore, a coating film having substantially the same finished quality as that obtained in the actual coating process can be formed.

Due to the necessity of securing excessive space in order to paint, there is a problem that the place where the film forming apparatus can be installed is restricted and a large amount of energy is required to control the air in the paint booth. There will be many uses in the coating process industry by developing a film forming apparatus that can realize the reduction.

Claims (4)

A workpiece conveyor for moving the workpiece; A spray gun conveyor for moving a spray gun for spraying paint; And A controller for controlling the operation of the workpiece conveyor, the spray gun and the spray gun conveyor, The controller moves in a constant direction while reciprocating the workpiece in the state that the paint is sprayed from the spray gun so that the sequential partial coating is performed, During the painting of the workpiece, the controller integrally shifts the workpiece and the spray gun while the relative position between the workpiece and the spray gun is kept constant. Coating film forming apparatus. The method of claim 1, The direction in which the to-be-painted object and the spray gun are shifted is reverse to the direction of movement of the to-be-painted object to which the partial coating is performed. Coating film forming apparatus. The method of claim 2, When the center of the spray discharged from the spray gun is located in the middle of the length of the workpiece in the shift direction, the shift of the workpiece and the spray gun is performed. Coating film forming apparatus. The method of claim 1, The controller reciprocating the spray gun in a manner synchronized in reverse with respect to the reciprocation of the workpiece. Coating film forming apparatus.

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