JP2013228148A - Coating drying device and coating drying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating drying device and a coating drive method capable of quickly drying a workpiece and improving appearance of the workpiece.SOLUTION: A coating drying device includes an induction heating source which is arranged around a workpiece 50 coated with coating. The coating drying device includes:a first drying device 2 which primarily dries the coating; and a second drying device 3 which contains infrared radiation source for radiating infrared ray to the coating on the workpiece 50 primarily dried by the first drying device 2, to secondarily dry the coating.

Description

  The present invention relates to a coating / drying apparatus that dries a paint applied to a work after the paint is applied to the work. The present invention also relates to a paint drying method for drying a paint applied to a work after the paint is applied to the work.

  Conventionally, as a workpiece drying device, there is a water-washing wheel drying device described in Japanese Patent Application Laid-Open No. 2009-36389 (Patent Document 1). This drying apparatus has an induction heating source, generates an eddy current in the wheel by induction heating, heats the wheel with Joule heat resulting from the current, and evaporates moisture on the wheel surface. .

  Since the conventional drying apparatus uses induction heating, the temperature of the wheel can be increased rapidly and the wheel can be quickly dried.

  However, in the above conventional drying apparatus, drying is performed only by induction heating, and therefore, the degree of drying may vary between a location where Joule heat is generated and a location where Joule heat is not generated.

  In addition, since drying is performed by induction heating, it is difficult to precisely control the temperature of the workpiece, and it is difficult to make the appearance quality of the coating excellent.

JP 2009-36389 A

  Therefore, the problem of the present invention is that the temperature of the workpiece can be raised rapidly, the workpiece can be dried quickly, and the workpiece can be heated uniformly and the temperature of the workpiece can be precisely controlled. An object of the present invention is to provide a paint drying apparatus and a paint drying method capable of improving the appearance quality of a workpiece.

In order to solve the above problems, the paint drying apparatus of the present invention is:
A first drying device that has an induction heating source disposed around a workpiece coated with the paint, and temporarily dries the paint;
And a second drying device for secondarily drying the paint, having an infrared irradiation source for irradiating the paint of the work primarily dried by the first drying device with infrared rays. Yes.

  According to the present invention, since the first drying device having the induction heating source and temporarily drying the paint applied to the workpiece based on the induction heating is provided, the workpiece is rapidly heated by induction heating. The workpiece can be dried quickly.

  In addition, according to the present invention, since the second drying device having an infrared irradiation source and drying the paint primarily dried by induction heating with infrared rays having excellent heat uniformity and temperature controllability is provided, the paint is applied. The temperature of the paint can be maintained at a temperature suitable for the quality of the paint regardless of the place where it is applied. Therefore, the appearance quality of the coating can be improved.

In one embodiment,
At least one of the first drying device and the second drying device has an air blowing device for blowing air to the paint on the workpiece.

  According to the embodiment, since at least one of the first drying device and the second drying device has the blower device for blowing air to the paint of the work, at least one of the primary drying and the secondary drying. The wind from the blower can be blown onto the workpiece. Therefore, since at least one of the primary drying and the secondary drying, the vapor evaporated from the paint of the heated workpiece can be efficiently scattered far away from the workpiece by the wind from the blower, The vapor pressure of the vapor can be lowered, the evaporation of moisture from the paint of the workpiece can be promoted, and the workpiece can be dried more quickly.

In one embodiment,
A coating device disposed on the upstream side of the first drying device and coating the workpiece with the paint;
A cooling device that cools the work in which the paint is secondarily dried by the second drying device.

  The upstream side means that the time is fast in time series, and that the upstream side of the first drying device means that the treatment is performed before drying by the first drying device. Shall.

  According to the embodiment, the workpiece can be quickly cooled by the cooling device.

  According to the present invention, the temperature of the workpiece can be increased rapidly, the workpiece can be dried quickly, the workpiece can be heated uniformly and the temperature of the workpiece can be precisely controlled. It is possible to realize a coating and drying apparatus and a coating and drying method that can improve the appearance quality.

It is a figure when the coating drying apparatus of one Embodiment of this invention is seen from the upper direction of the perpendicular direction. It is a schematic diagram which shows the structure around the 2nd conveyance part. It is a side view of a 1st drying apparatus. It is a top view of the 1st drying device. It is a perspective view which shows a 1st induction heating part, a 2nd induction heating part, and a workpiece | work. It is a block diagram of the control apparatus of a 1st drying apparatus. It is a side view of a 2nd drying apparatus. It is a top view of a 2nd drying apparatus. It is a block diagram of the control apparatus of a 2nd drying apparatus.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  Drawing 1 is a figure when the paint drying device of one embodiment of the present invention is seen from the upper part of the perpendicular direction.

  The coating drying apparatus includes a coating apparatus 1, a first drying apparatus 2, a second drying apparatus 3, a cooling apparatus 4, and a workpiece transfer apparatus (not shown). This coating and drying apparatus applies a CVJ outer (outer of constant velocity joint) 50 (hereinafter simply referred to as a workpiece) as an example of a workpiece to coating by the coating apparatus 1, first drying by the first drying apparatus 2, and second drying apparatus. The second drying by 3 and the cooling by the cooling device 4 are performed in this order, and the workpiece 50 is coated and then dried.

  In FIG. 1, positions 1 to 7 are positions that the workpiece 50 can take with this apparatus. Referring to FIG. 1, positions 1, 2, 4 to 7 are positioned on a straight line and spaced from each other in one direction, while position 3 is a direction orthogonal to the one direction with respect to position 2. Is located at a predetermined distance.

  The workpiece transfer device includes first to sixth transfer units, the first transfer unit transfers the workpiece 50 from position 1 to position 2, and the second transfer unit transfers the workpiece 50 to position 2 and position 3. The third conveyance unit conveys the workpiece 50 from position 2 to position 4, the fourth conveyance unit conveys the workpiece 50 from position 4 to position 5, and the third conveyance unit conveys the workpiece 50 from position 4 to position 5. The fifth transport unit transports the work 50 from position 5 to position 6, and the sixth transport unit transports the work 50 from position 6 to position 7.

  Each of the first and third to sixth transport units includes an arm, a chuck device, a vertical movement cylinder, and a horizontal movement cylinder. The arm extends in the vertical direction. It is fixed to the end on the lower side in the vertical direction. The vertical movement cylinder moves the arm in the vertical direction, and the horizontal movement cylinder moves the arm in the one direction.

  Further, as shown in FIG. 2, the second transport unit 60 includes a stand 21 on which the work 50 is placed and a horizontal movement cylinder 22. With the horizontal movement cylinder 22, the stand 21 is moved to position 2. The position between the position 3 in the painting booth 61 is advanced and retracted in the orthogonal direction indicated by the arrow A in FIG.

  This coating / drying apparatus is configured to simultaneously transport a plurality of workpieces 50. Specifically, in the coating and drying apparatus, after the measures at each position are completed, first, the second transport unit 60 moves the stand 21 from the position 3 to the position 2, and then the first, third to sixth transport units. However, the conveyance is performed at the same time, and finally, the second conveyance unit 60 moves the stand 21 from the position 2 to the position 3 to perform the conveyance.

  In this coating and drying apparatus, the workpiece 50 is coated and dried as follows.

  First, the work 50 is placed on a stand at the position where the work 50 is placed, which is indicated by position 1, and is then transported from position 1 to position 2 by the first transport unit. Specifically, the workpiece 50 placed on the stand at the loading position of the workpiece 50 indicated by position 1 is held by a chuck fixed to the arm of the first conveyance unit, and then the vertically moving cylinder of the first conveyance unit. And is moved in the one direction by the horizontal moving cylinder of the first transport unit. Thereafter, the work 50 is moved downward by the vertical movement cylinder of the first transport unit and placed on the work placement surface of the stand existing at position 2, and then the work 50 is fixed by the chuck. In addition, the conveyance of the workpiece | work 50 by the said 3rd-6th conveyance part is the same as the conveyance of a 1st conveyance part. The description of the conveyance of the workpiece 50 by the third to sixth conveyance units is omitted from the description of the conveyance of the first conveyance unit.

  Thereafter, the second conveyance unit 60 (see FIG. 2) causes the stand 21 that is in position 2 and on which the workpiece 50 is placed to move inside the coating booth 61 by the horizontal moving cylinder 22 of the second conveyance unit 60. Pull into position 3. Subsequently, the workpiece 50 placed on the placement surface of the stand 21 existing at the position 3 is painted.

  Specifically, as shown in FIG. 1, the coating apparatus 1 has a coating nozzle 11, and the coating nozzle 11 is directed to the one direction and has a work placed on a stand located at position 3. It is directed towards the 50 central axis. The stand of the second transport unit can be rotated clockwise in the direction indicated by arrow A in FIG. 1 by a motor indicated by reference numeral 63 in FIG. The work 50 on the stand 21 located at the position 3 is rotated clockwise by a motor 63 and paint is sprayed onto the work 50 from the coating nozzle 11 to coat the work 50.

  Thereafter, the stand 21 on which the painted workpiece 50 is placed is moved from the position 3 in the painting booth 61 to the position 2 by the horizontal movement cylinder 22 by the horizontal movement cylinder 22 of the second transport unit 60. Let Thereafter, the work 50 existing at the position 2 is conveyed to the position 4 where primary drying of the paint coated on the work 50 is carried out by the third conveying unit, and the first drying device 2 applies the paint to the paint as follows. Primary drying by induction heating described in detail is performed.

  After that, the fourth transport unit transports the primary dried workpiece 50 positioned at position 4 from position 4 to position 5 where secondary coating of the paint applied to the workpiece 50 is performed, In the second drying device 3, the paint is subjected to secondary drying by infrared rays, which will be described in detail below.

  After that, the work 50 that has been subjected to secondary drying positioned at position 5 is transported from position 5 to position 6 where cooling of the work 50 is performed by the fifth transport unit, and the work is performed by the cooling device 4 including air blow. Cool 50 times. Finally, the cooled workpiece 50 positioned at position 6 is conveyed from position 6 to the discharge position 7 by the sixth conveying section, and the coating and drying of the workpiece 50 are completed.

  Although not described in detail, in FIG. 1, reference numeral 88 indicates a control panel, and in FIGS. 1 and 2, reference numeral 100 indicates a user.

  FIG. 3 is a side view of the first drying device 2 that primarily dries the workpiece 50 located at the position 4.

  As shown in FIG. 3, the first drying device 2 includes an induction heating source 101, a rotary table 102, a moving mechanism 103, and a blower device 104, and the induction heating source 101 includes a first induction heating unit 110. And a second induction heating unit 111, a radiation thermometer, and a control device as control means.

  As will be described later, each of the first and second induction heating units 110 and 111 has a flat coil, and the magnetic flux is substantially generated only on the front side which is one side in the axial direction of the winding of the flat coil. The magnetic flux is generated only on the substantially front side of each of the first and second induction heating units 110 and 111. The front side of the first induction heating unit 110 and the front side of the second induction heating unit 111 face each other in one direction.

  The rotary table 102 includes a disk-shaped stand 120 and a motor 121. A work placement surface 123 of the stand 120 is a circular plane and faces upward in the vertical direction. The stand 120 is present at a position that bisects a line connecting the first induction heating unit 110 and the second induction heating unit 111 approximately vertically. A rotating shaft 124 of a motor 121 is connected to the center of the lower surface of the stand 120. The axial direction of the stand 120 coincides with the axial direction of the rotating shaft 124 of the motor 121. The stand 120 is rotatable in a direction indicated by an arrow A in FIG. 3 by a motor.

  The moving mechanism 103 includes a first electric cylinder 130 and a second electric cylinder 131. As shown in FIG. 3, the first drying device 2 has an L-shaped first mounting plate 150, and the first mounting plate 150 includes a first plate portion extending in the vertical direction and a horizontal direction. And a second plate portion extending. The second plate portion extends from the surface on the rear side of the end portion on the lower side in the vertical direction of the first plate portion. The rear surface of the first induction heating unit 110 is fixed to the front surface of the first plate portion of the first mounting plate 150 by bolts 190 and 191. Further, the upper surface of the first electric cylinder 130 is fixed to the surface on the lower side in the vertical direction of the second plate portion of the first mounting plate 150. The first electric cylinder 130 is not movable relative to the first induction heating unit 110. The second electric cylinder 131 is also immovable relative to the second induction heating unit 111 via the second mounting plate 151 by the same structure as the first electric cylinder 130.

  The first electric cylinder 130 makes contact with the rotary table 102 while improving the first induction heating unit 110 in the opposite direction of the first and second induction heating units 110 and 111 indicated by an arrow B in FIG. It is designed to move freely. In addition, the second electric cylinder 131 improves the second induction heating unit 111 in the opposite direction of the first and second induction heating units 110 and 111 indicated by an arrow C in FIG. To move freely.

  The first and second induction heating units 110 and 111 are configured to have a first and second electric cylinders 130 and 131, and a vertical segment of a line segment connecting the rotary table 102 to the first and second induction heating units 110 and 111. It is designed to move in conjunction so that it is always on the line.

  The blower 104 is made of a well-known blower, and is configured to pump air by a rotary motion of an impeller and discharge it from a blower opening. As shown in FIG. 3, the blower port of the blower 104 extends in the vertical direction. In this way, wind can be blown over the entire existence range in the axial direction (extending direction) of the coating region of the workpiece 50 extending in the vertical direction.

  FIG. 4 is a top view of the first drying device 2.

  As shown in FIG. 4, the air blowing device 104 includes a first air blowing port 141 and a second air blowing port 142, and the first air blowing port 141 performs second induction heating on the second induction heating unit 111. The second air blowing port 142 is located on the other side of the direction perpendicular to the moving direction of the second induction heating unit 111 with respect to the second induction heating unit 111, while being located on one side of the direction perpendicular to the moving direction of the unit 111. positioned. Each of the first air blowing port 141 and the second air blowing port 142 is directed between the first induction heating unit 110 and the second induction heating unit 111 and is directed to the side surface of the workpiece 50. In this way, the first drying device 2 is configured to remove the vapor evaporated by the wind from the first air outlet 141 and the second air outlet 142 from the periphery of the workpiece 50. In addition, the first drying device 2 performs the drying of the work 50 by the induction heating of the first and second induction heating units 110 and 111, the first induction heating unit 110, the second induction heating unit 111, and the like. Simultaneous drying with the drying of the work 50 by blowing wind from the gap is realized.

  As shown in FIG. 4, the first drying device 2 includes a radiation thermometer 105, and the radiation energy measurement direction of the radiation thermometer 105 is between the first induction heating unit 110 and the second induction heating unit 111. It is directed to the side of the workpiece 50. As shown in FIG. 4, the first induction heating unit 110, the second induction heating unit 111, the first air blowing port 141, the second air blowing port 142, and the radiation energy measuring unit of the radiation thermometer 105 surround the workpiece 50. As such, they are spaced from each other.

  FIG. 5 is a perspective view showing the first induction heating unit 110, the second induction heating unit 111, and the workpiece 50.

  As shown in FIG. 5, the first induction heating unit 110 is the same as the second induction heating unit 111. The first induction heating unit 110 includes a ferrite core 180 and a flat coil 181 made of a track-shaped winding. The ferrite core 180 has a bowl-shaped main body portion having a U-shaped cross section and three cylindrical portions, and each cylindrical portion is in the width direction at the bottom of the main body portion (direction perpendicular to the extending direction of the flange). Projecting in the depth direction of the ridge from the substantially central portion of the main body to the opening side of the main body. The three cylindrical portions are located at a distance from each other in the extending direction of the flange. The ferrite core 180 has an E shape when viewed from the outer side in the extending direction of the main body (upward or downward in the vertical direction). The ferrite core 180 is made of a known material capable of forming a ferrite core such as a laminated steel plate.

  The flat coil 181 is wound around the three cylindrical portions so as to surround the three cylindrical portions, is molded with resin, and is attached to the three cylindrical portions. The tip of the cylindrical part of the first induction heating unit 110 and the tip of the cylindrical part of the second induction heating unit 111 are opposed to the extending direction of the cylindrical part. A workpiece 50 exists between the first induction heating unit 110 and the second induction heating unit 111 so as to be sandwiched between the first induction heating unit 110 and the second induction heating unit 111. In addition, during the primary drying, the axial direction of the workpiece 50 coincides with the vertical direction.

  The ferrite core 180 covers both side surfaces other than the front side of the flat coil 181 and the rear side so that the magnetic flux is efficiently generated only on the front side, and the paint of the workpiece 50 positioned in front of the flat coil 181. Induction heating that can evaporate the water is realized.

  FIG. 6 is a block diagram of the control device 160 of the first drying device.

  The control device 160 includes a CPU, and the CPU performs arithmetic processing based on a program stored in advance or a program stored in the future. The control device 160 includes an IH control unit 161, an electric cylinder control unit 162, a blower control unit 163, a table control unit 164, and a timer 165. The first drying device 2 includes an operation unit 108, and the operation unit 108 can set the distance between the rotary table 102 and the first and second induction heating units 110 and 111 and the drying temperature of the paint. It has become.

  Specifically, in the first drying device 2, the user uses the operation unit 108 based on the size of the work 50 to dry the coating, and the rotary table 102 and the first and second induction heating units 110 and 111. You can enter the distance. In addition, when the electric cylinder control unit 162 receives the signal indicating the distance from the operation unit 108, the distance between the rotary table 102 and the first and second induction heating units 110 and 111 is set to the input distance. Thus, the electric cylinders 130 and 131 are driven. In the first drying device 2, the first and second induction heating units 110 and 111 are arranged in the front-rear direction in accordance with the workpiece diameter of the workpiece 50 on the rotary table 102 (a plurality of models having different diameters of the workpiece 50). To move to.

  Further, in the first drying device 2, when the user inputs the drying temperature of the paint, the IH power control unit 161 that has received a signal representing the temperature from the radiation thermometer 105 determines that the temperature of the paint on the work 50 is the input temperature. When the temperature is lower than that, power is supplied to the IH power source 166, while power is not supplied to the IH power source 166 when the temperature of the paint of the workpiece 50 is equal to or higher than the input temperature. In this way, automatic control by feedback is performed so that the temperature of the paint of the workpiece 50 is maintained at the input temperature. In this way, the first drying device 2 improves the appearance quality of the coating by precisely monitoring the coating temperature.

  Moreover, in this 1st drying apparatus 2, the user can input drying time. The table control unit 164 drives the table motor 167 when the drying of the coating starts, and stops the table motor 167 when the measurement by the timer 165 reaches the input drying time. It has become. Thus, by rotating the workpiece 50, the paint applied to the outer circumferential surface of the workpiece 50 is efficiently dried regardless of the phase of the outer circumferential surface of the workpiece 50. The blower control unit 163 drives the blower 104 when the drying of the coating starts, and stops the blower 104 when the measurement by the timer 165 reaches the input drying time. It is like that.

  FIG. 7 is a side view of the second drying device 3 that secondarily dries the workpiece 50 positioned at the position 5.

  As shown in FIG. 7, the second drying device 3 includes an infrared irradiation source 201, a rotary table 202, a moving mechanism 203, a blower device 204, a radiation thermometer, and a control device. The infrared irradiation source 201 has a plurality of infrared irradiation units, and each infrared irradiation unit has a cylindrical shape and extends in the vertical direction.

  The moving mechanism 203 includes a first electric cylinder 230 and a second electric cylinder 231. As shown in FIG. 7, the second drying device 3 includes an L-shaped first mounting plate 250 and a first reflecting plate, and the first mounting plate 250 extends in the vertical direction. It has a board part and the 2nd board part extended in a horizontal direction. The second plate portion extends from the surface on the rear side of the end portion on the lower side in the vertical direction of the first plate portion.

  The second drying device 3 includes a first reflector (indicated by 270 in FIG. 8) and a second reflector (indicated by 271 in FIG. 8), and the rear surface of the first reflector is The first mounting plate 250 is fixed to the surface of the first plate portion opposite to the second plate portion by bolts 290 and 291. Further, the upper surface of the first electric cylinder 230 is fixed to the surface on the lower side in the vertical direction of the second plate portion of the first mounting plate 250. The first electric cylinder 230 is not movable relative to the first reflector. The second electric cylinder 231 is also immovable relative to the second reflecting plate via the second mounting plate 251 with the same structure as the first electric cylinder 230.

  The first reflecting plate and the second reflecting plate are disposed so as to face each other in one direction. The first electric cylinder 230 moves the first reflector in the direction opposite to the first and second reflectors as indicated by an arrow B in FIG. It is like that. In addition, the second electric cylinder 231 allows the second reflector to be brought into and out of contact with the first reflector in one direction, which is the opposing direction of the first and second reflectors as indicated by an arrow C in FIG. It is designed to move.

  The rotary table 202 includes a disk-shaped stand 220 and a motor 221, and the work placement surface 223 of the stand 220 is a circular plane and faces upward in the vertical direction. The stand 220 is present at a location that bisects a line segment connecting the first reflector and the second reflector substantially vertically. A rotation shaft 224 of the motor 221 is connected to the center of the lower surface of the stand 220. The axial direction of the stand 220 coincides with the axial direction of the rotating shaft 224 of the motor 221. The stand 220 is rotatable by a motor in a direction indicated by an arrow A in FIG. The first and second reflectors are always positioned on the perpendicular bisector of the line segment connecting the first and second reflectors by the first and second electric cylinders 230 and 231. , Move in conjunction with.

  The blower 204 is made of a well-known blower, and is configured to pump air by a rotary motion of an impeller and discharge it from a blower opening. As shown in FIG. 7, the blower opening of the blower 204 extends in the vertical direction. In this way, wind can be blown over the entire existing range in the axial direction (extending direction) of the coating region of the workpiece 50 extending in the vertical direction.

  FIG. 8 is a top view of the second drying device 3.

  As shown in FIG. 8, the first reflecting plate 270 includes a first plate portion 240, a second plate portion 241, and a third plate portion 242, and these three plate portions 240, 241, and 242 are used. The structure is the same as that of a trihedral mirror. The first plate portion 240 is attached to the first attachment plate 250. The second plate portion 241 extends from one end portion in the width direction of the first plate portion 240 in a direction inclined with respect to the first plate portion 240, and in detail, goes toward the second mounting plate 251. Accordingly, the first plate portion 240 extends in the width direction. Similarly, the third plate portion 242 extends in a direction inclined with respect to the first plate portion 240 from the other end portion in the width direction of the first plate portion 240. It extends in the direction away from the 1st board part 240 in the said width direction as it goes to the direction. The surfaces of the first to third plate portions 240 to 242 on the rotary table 202 side are made of a known infrared reflecting material such as an aluminum alloy. The second reflecting plate 271 has the same structure as the first reflecting plate 270. The second reflector 271 is disposed so as to be plane-symmetric with respect to the first reflector 270 with respect to a plane that passes through the central axis of the rotary table 202 and is perpendicular to the moving direction of the first electric cylinder 230. ing.

  Moreover, as shown in FIG. 8, the infrared irradiation source 201 includes first to fourth infrared irradiation units 260 to 263, and the radial direction (radial direction) from each of the first to fourth infrared irradiation units 260 to 263. ) Is irradiated with near infrared rays. The first and second infrared irradiation units 260 and 261 are fixed to the first reflection plate 270 so as not to move relative to the first reflection plate 270 using a known fixture, while the third and fourth infrared irradiation units 262 and 263 are fixed to the second reflecting plate 271 so as not to move relative to the second reflecting plate 271 using a known fixture.

  Each of the first and second infrared irradiators 260 and 261 exists in a region surrounded by the three-sided mirror of the first reflector 270. The first and second infrared irradiation units 260 and 261 are arranged in plane symmetry with respect to a plane including the central axis of the rotary table 202 and the moving direction of the first electric cylinder 230. Similarly, each of the third and fourth infrared irradiation units 262 and 263 exists in a region surrounded by the three-sided mirror of the second reflecting plate 271. The third and fourth infrared irradiation units 262 and 263 are arranged in plane symmetry with respect to a plane including the central axis of the rotary table 202 and the moving direction of the first electric cylinder 230.

  The blower 204 has a first blower port 281 and a second blower port 282, and the first blower port 281 is a direction perpendicular to the moving direction of the first electric cylinder 230 with respect to the second reflector 271. On the other hand, the second air outlet 282 is located on the other side in the direction perpendicular to the moving direction of the first electric cylinder 230 with respect to the second reflector 271. Each of the first air outlet 281 and the second air outlet 282 is directed between the first reflector 270 and the second reflector 271, and is directed to the side surface of the workpiece 50. In this way, the second drying device 3 removes the vapor evaporated by the wind from the first air outlet 281 and the second air outlet 282 from the periphery of the workpiece 50. Further, the second drying device 3 is configured to dry the work 50 by near infrared irradiation of the first to fourth infrared irradiation units 260 to 263 and to blow wind from the gap between the first reflecting plate 270 and the second reflecting plate 271. The workpiece 50 can be simultaneously dried with the drying of the workpiece 50.

  Further, as shown in FIG. 8, the second drying device 3 includes a radiation thermometer 205, and the radiation energy measurement direction of the radiation thermometer 205 is between the first reflector 270 and the second reflector 271. Directed to the side of the workpiece 50. As shown in FIG. 8, the 1st infrared irradiation part 260, the 2nd infrared irradiation part 261, the 3rd infrared irradiation part 262, the 4th infrared irradiation part 263, the 1st ventilation port 281, the 2nd ventilation port 282, and a radiation thermometer The radiant energy measuring units 205 are arranged at intervals from each other so as to surround the workpiece 50.

  FIG. 9 is a block diagram of the control device 360 of the second drying device 3.

  The control device 360 includes a CPU, and the CPU performs arithmetic processing based on a program stored in advance or a program stored in the future. The control device 360 includes an infrared irradiation power supply control unit 361, an electric cylinder control unit 362, a blower control unit 363, a table control unit 364, and a timer 365. The second drying device 3 includes an operation unit 308. With the operation unit 308, the distance between the rotary table 302 and the first and second reflectors 270 and 271 and the drying temperature of the paint can be set. ing.

  Specifically, in the second drying device 3, the user uses the operation unit 308 based on the size of the work 50 to dry the coating, and the distance between the rotary table 302 and the first and reflectors 270 and 271. Can be entered. In addition, when the electric cylinder control unit 362 receives a signal representing the distance from the operation unit 308, the distance between the rotary table 302 and the first and second reflectors 270 and 271 becomes the input distance. Thus, the electric cylinders 230 and 231 are driven. In the second drying device 3, the first and second reflectors 270 and 271 move back and forth in this way in accordance with the workpiece diameter of the workpiece 50 on the rotary table 202 (a plurality of models having different diameters of the workpiece 50). It is supposed to be.

  Further, in the second drying device 3, when the user inputs the drying temperature of the paint, the infrared irradiation power control unit 361 that receives the signal representing the temperature from the radiation thermometer 205 determines that the temperature of the paint on the work 50 is high. When the temperature is lower than the input temperature, power is supplied to the infrared irradiation power source 366, while when the temperature of the paint of the workpiece 50 is equal to or higher than the input temperature, power is not supplied to the infrared irradiation power source 366. In this way, automatic control by feedback is performed so that the temperature of the paint of the workpiece 50 is maintained at the input temperature. In this way, the second drying device 3 makes the appearance quality of the coating good by accurately monitoring the coating temperature.

  In the second drying device 3, the user can input the drying time. The table control unit 364 drives the table motor 367 when the drying of the coating starts, and stops the table motor 367 when the measurement by the timer 365 reaches the input drying time. It has become. Thus, by rotating the workpiece 50, the paint applied to the outer circumferential surface of the workpiece 50 is efficiently dried regardless of the phase of the outer circumferential surface position. The blower control unit 363 drives the blower 204 when the drying of the coating starts, and stops the blower 204 when the measurement by the timer 365 reaches the input drying time. It is like that.

  As shown in FIG. 1, the cooling device 4 includes a blower 204 having a first blower port 281 and a second blower port 282, a rotary table 202, and a motor that rotates the second blower 3. The structure is such that only there is no other part.

  According to the above embodiment, the first drying device 2 that includes the induction heating source 101 and temporarily drys the paint applied to the workpiece 50 based on the induction heating is provided. The temperature of the workpiece can be increased, and the workpiece can be dried quickly.

  Moreover, according to the said embodiment, since it has the 2nd drying apparatus 3 which has the infrared irradiation source 201, and dries the paint primarily dried by induction heating with near infrared rays excellent in heat uniformity and temperature controllability. The temperature of the paint can be maintained at a temperature suitable for the quality of the paint regardless of the place where the paint is applied. Therefore, the appearance quality of the coating can be improved.

  Moreover, according to the said embodiment, since both the 1st drying apparatus 2 and the 2nd drying apparatus 3 have the air blowers 104 and 204 for spraying a wind on the coating material of the workpiece | work 50, primary drying and secondary drying are carried out. In both cases, the wind from the blowers 104 and 204 can be blown onto the workpiece 50. Therefore, in both the primary drying and the secondary drying, the vapor evaporated from the paint of the heated workpiece 50 can be efficiently scattered far away from the workpiece 50 by the wind from the blowers 104 and 204. Therefore, the vapor pressure of the steam around the workpiece 50 can be lowered, evaporation of moisture from the paint of the workpiece 50 can be promoted, and the workpiece 50 can be dried more quickly.

  Moreover, according to the said embodiment, since the cooling device 4 which cools the workpiece | work 50 in which the said coating material was dried by the 2nd drying apparatus 3 exists, the workpiece | work 50 can be cooled rapidly. .

  Moreover, according to the said embodiment, since a drying process is divided into two steps, the cycle time of the coating drying of the workpiece | work 50 can be reduced significantly, and the productivity of the workpiece | work 50 can be improved significantly. This is because, as described above, this coating and drying apparatus is configured to simultaneously transport a plurality of workpieces 50, but the drying time is usually longer than the coating time. Therefore, when the drying step is performed in only one step, the operation rate of the coating apparatus is lowered because the next configuration cannot be performed unless the drying step is completed. On the other hand, in this invention, since a drying process is performed in two steps, the operation rate of a coating device can be made high and the productivity of a workpiece | work can be improved. To explain this more easily, if it takes 60 seconds to dry and 30 seconds to paint, if the drying process is performed in one process, it will not be transported until the drying is completed. The coating device will not operate for nearly 30 seconds between the time and the transfer. On the other hand, when the drying position is increased to two locations and drying is performed in two steps, if each of the two drying steps takes 30 seconds, the conveyance is performed approximately every 30 seconds. And productivity will be improved by almost twice as much.

  Moreover, according to the said embodiment, since it dried together using the expensive induction heating source 101 and the comparatively cheap infrared irradiation source 201, two steps of drying are expensive induction heating. Compared with the case where two sources are prepared, the manufacturing cost of the paint drying apparatus can be greatly reduced.

  In the above embodiment, both the first drying device 2 and the second drying device 3 have the blower devices 104 and 204. In the present invention, of the first drying device and the second drying device, Only one side may be the composition which has a blower. Moreover, in this invention, the structure which does not have an air blower may be sufficient as both the 1st drying apparatus and the 2nd drying apparatus.

  Moreover, in the said embodiment, although the infrared irradiation source 201 was a structure which irradiates near infrared rays, in this invention, an infrared irradiation source irradiates one or more infrared rays among near infrared rays, middle infrared rays, and far infrared rays. It may be possible.

  Moreover, in the said embodiment, the wind of the temperature substantially the same as external temperature is discharged from the ventilation port 141,142,281,282 by each ventilation apparatus 104,204 of the 1st and 2nd drying apparatuses 2,3. It was like that. However, in the present invention, at least one blower device is provided with a heater or the like on the downstream side of the wind flow from the impeller to turn the wind at a temperature substantially the same as the outside air temperature into one or more hot air. Hot air may be blown from the blower opening to the work, and in this way, the work can be dried more efficiently.

  Moreover, in the said embodiment, in the 1st drying apparatus 2, the 1st induction heating part 110 and the 2nd induction heating part 111 move interlockingly, and the turntable 102 is the 1st induction heating part 110, the 1st induction heating part 110, Although it always exists on the perpendicular bisector connecting the two induction heating units 111, in the present invention, in the first drying device, the rotary table includes the first induction heating unit and the first induction heating unit. A configuration that does not always exist on the vertical bisector connecting the two induction heating units may be used.

  Moreover, in the said embodiment, in the 1st drying apparatus 2, the 1st induction heating part 110 and the 2nd induction heating part 111 are mutually 180 degree | times in the circumferential direction of the turntable 102 so that the turntable 102 may be pinched | interposed. Although arranged so as to have a phase difference, in the present invention, in the first drying apparatus, the first induction heating unit and the second induction heating unit are arranged with a phase difference of an angle other than 180 degrees with respect to the circumferential direction of the rotary table. You may arrange | position so that it may have.

  Moreover, in the said embodiment, in the 1st drying apparatus 2, although the induction heating source 101 consisted of the 1st induction heating part 110 and the 2nd induction heating part 111 which are located mutually spaced apart, in this invention In the first drying device, the induction heating source may be composed of only one induction heating unit, or may be composed of three or more induction heating units that are spaced from each other.

  Moreover, in the said embodiment, although the 1st drying apparatus 2 had the two ventilation ports 141 and 142 located mutually spaced apart, in this invention, a 1st drying apparatus has a ventilation opening, one. There may be only one, and you may have three or more ventilation openings located mutually spaced apart.

  Moreover, in the said embodiment, although the 1st drying apparatus 2 had the radiation thermometer 105, in this invention, the 1st drying apparatus does not need to have a radiation thermometer.

  In the above embodiment, in the first drying apparatus 2, the first induction heating unit 110 and the second induction heating unit 111 are movable by the electric cylinders 130 and 131. In one drying apparatus, the induction heating source may be movable by a known mechanism other than an electric cylinder such as an air cylinder or a hydraulic cylinder.

  Moreover, in the said embodiment, although each induction heating part 110,111 had the integral type ferrite core 180 in the 1st drying apparatus 2, in this invention, one or more induction | guidance | derivation is carried out in the 1st drying apparatus. The ferrite core of at least one induction heating unit among the heating units may be formed by mounting a plurality of ferrite cores in the vertical direction (corresponding to the normal direction of the U-shaped end surface of each ferrite core). . For example, in the case of a ferrite core having three cylindrical parts as shown in FIG. 5, three E-type ferrite cores having only one cylindrical part may be stacked in the vertical direction. Two E-type ferrite cores on one side and two E-type ferrite cores having only one cylindrical portion may be stacked in the vertical direction.

  Moreover, in the said embodiment, although the ferrite core 180 of each induction heating part 110,111 had three cylindrical parts in the 1st drying apparatus 2, in this invention, one or more in the 1st drying apparatus. The ferrite core of at least one of the induction heating units may have 1, 2, or 4 or more cylindrical portions. In this case, for example, by stacking 1, 2 or 4 or more E-shaped ferrite cores having only one cylindrical portion in the vertical direction (corresponding to the normal direction of the U-shaped end face of each ferrite core) Ferrite cores with one, two, or four or more cylindrical parts can be created, but in this way, a ferrite core can be easily formed that can efficiently raise the temperature and reduce energy loss according to the size of the workpiece. It is possible and preferable.

  Moreover, as a method of arranging the workpiece at a predetermined position such as a position where the line segment connecting the first induction heating unit and the second induction heating unit is equally divided, for example, a method other than the method described in the above embodiment In addition, there is a method in which a rotary table on which a work is placed is movable by an advancing / retreating mechanism such as an electric cylinder, and the rotary table on which the work is placed is moved to a predetermined position. As another method, there is a method in which a work placed on a belt facing upward in the vertical direction is arranged at a predetermined position by moving the belt.

  Moreover, in the said embodiment, the temperature which can be input with the operation part 108 of the 1st drying apparatus 2 may be single-point temperature, and may be a temperature range (temperature range which has an upper limit and a minimum).

  Moreover, in the said embodiment, in the 2nd drying apparatus 3, the 1st reflecting plate 270 and the 2nd reflecting plate 271 move in conjunction, and the rotary table 202 is the 1st reflecting plate 270 and the 2nd reflecting plate. In the second drying apparatus, the rotary table includes a first reflector and a second reflector, which always exist on the vertical bisector connecting the line 271 and the line. A configuration that does not always exist on the perpendicular bisector of the connected line segments may be used.

  In the above embodiment, in the second drying device 3, the first reflecting plate 270 and the second reflecting plate 271 are 180 degrees apart from each other in the circumferential direction of the turntable 202 so as to sandwich the turntable 202. However, according to the present invention, in the second drying apparatus, the first reflector and the second reflector have a phase difference other than 180 degrees in the circumferential direction of the rotary table. It may be arranged.

  Moreover, in the said embodiment, in the 2nd drying apparatus 3, the infrared irradiation source 201 consisted of the 1st-4th infrared irradiation parts 260-262 located mutually spaced apart. In the drying apparatus, the infrared irradiation source may be composed of 1 or more and 3 or less infrared irradiation sections, and may be composed of 5 or more induction heating sections that are spaced from each other.

  Moreover, in the said embodiment, although the 2nd drying apparatus 3 had the two ventilation ports 281 and 282 located mutually spaced apart, in this invention, a 2nd drying apparatus has a ventilation port, one There may be only one, and you may have three or more ventilation openings located mutually spaced apart.

  Moreover, in the said embodiment, although the 2nd drying apparatus 3 had the radiation thermometer 205, in this invention, the 2nd drying apparatus does not need to have a radiation thermometer.

  Moreover, in the said embodiment, in the 2nd drying apparatus 3, the 1st reflecting plate 270 and the 2nd reflecting plate 271 were movable with the electric cylinders 230 and 231, However, In this invention, it is 2nd drying. In the apparatus, the infrared irradiation source may be movable by a known mechanism other than an electric cylinder such as an air cylinder or a hydraulic cylinder.

  Moreover, as a method of arranging the workpiece at a predetermined position such as a position where the line segment connecting the first reflecting plate and the second reflecting plate is bisected, for example, in addition to the method described in the above embodiment, There is a method in which a rotary table on which a workpiece is placed is movable by an advancing and retreating mechanism such as an electric cylinder, and the rotary table on which the workpiece is placed is moved to a predetermined position. As another method, there is a method in which a work placed on a belt facing upward in the vertical direction is arranged at a predetermined position by moving the belt.

  Moreover, in the said embodiment, the temperature which can be input with the operation part 308 of the 2nd drying apparatus 3 may be one-point temperature, and may be a temperature range (temperature range which has an upper limit and a minimum).

  In the above embodiment, referring to FIG. 1, the cooling device 4 has two air outlets 441 and 442 that are spaced from each other. However, in the present invention, only one cooling device is provided. The air outlet may be provided, or three or more air outlets positioned at intervals may be provided.

  Moreover, in the said embodiment, although the part which the eddy current flows was an outer part of a metal constant velocity joint in the said embodiment, in this invention, the part through which an eddy current flows has conductivity, such as a metal. Any product may be used as long as it is not limited to the outer of the constant velocity joint.

DESCRIPTION OF SYMBOLS 1 Coating apparatus 2 1st drying apparatus 3 2nd drying apparatus 4 Cooling apparatus 50 Work 101 Induction heating source 104,204 Blower 201 Infrared irradiation source

Claims (5)

A first drying device that has an induction heating source disposed around a workpiece coated with the paint, and temporarily dries the paint;
An infrared radiation source for irradiating the paint of the workpiece primarily dried by the first drying device with an infrared radiation source, and a second drying device for secondarily drying the paint. Paint drying equipment. In the paint drying apparatus according to claim 1,
At least one of the first drying device and the second drying device has a blower device for blowing air to the paint of the workpiece. The paint drying apparatus according to claim 1 or 2,
A coating device disposed on the upstream side of the first drying device and coating the workpiece with the paint;
A coating drying apparatus comprising: a cooling device that cools a work in which the paint is secondarily dried by the second drying device. An induction heating drying step of drying the paint primarily based on induction heating of the workpiece coated with the paint;
A coating drying method comprising: an infrared irradiation drying step of drying the coating material secondarily by irradiating the coating material dried primarily based on induction heating with infrared rays. In the paint drying method according to claim 3,
A paint drying method, wherein at least one of the induction heating drying step and the infrared irradiation step blows air on the paint.

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