JPH0681656U - Coating equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate variations in coating and to prevent problems such as drooling. A transport device 2 for transporting a work 1, a spray nozzle 3 for spraying a paint onto a heated work 1 transported by the transport device 2, and a work sprayed with the spray by the spray nozzle 3. In the coating apparatus including the drying unit 4 for drying and curing the coating material No. 1, the spray nozzle 3
A heating part 6 of a high-frequency heating device 5 for heating the work 1 is provided closer to the front side in the conveying direction. The outer circumference is covered so that it can be lifted and lowered so as to be separated from the work 1 when rising.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coating apparatus for spraying a fluororesin onto various works, for example, a rotor used in a car air conditioner compressor.

[0002]

[Prior art]

 Usually, a rotor D as shown in FIG. 3 is incorporated in the compressor of a car air conditioner, and the outer peripheral surface of the rotor D is spray coated with fluororesin. Conventionally, as an apparatus for spray-coating the rotor D with a fluororesin, there is an apparatus as shown in FIG.

This coating apparatus includes a chain A that revolves in the direction of arrow a in FIG. 4, and a pointed cylindrical column that is attached to the chain A so as to be rotatable in the direction of arrow b in the drawing. The carrier B, the pipe C detachably attached to the carrier B, and the carrier B provided so as to come into contact with the carrier B during the circulation of the chain A, and the carrier B is directed in the direction of arrow b in the figure. A rotating belt E for rotating, a spraying nozzle F for spraying the fluororesin on the rotor C rotated by the rotating belt E, and a heater G for drying and curing the fluorine resin sprayed on the rotor D. It is configured.

To perform coating with this coating apparatus, first, the rotor D to be coated is heated to about 100 ° C. by another heater (not shown), and some of the heated rotors D are taken out from the heater all together. , At the rotor mounting position P of the coating apparatus, insert the shaft of each rotor D into the pipe C set on the moving carrier B. When the rotor D is conveyed to the front of the spray nozzle F due to the circulation of the chain A, the chain A temporarily stops there and the rotor D also stops. At that time, the rotating belt E starts rotating to rotate the carrier B, and the rotor D rotates in the direction of arrow b in FIG. ) Is sprayed all around the rotor D. At this time, the spray nozzle F is automatically moved up and down so that the fluororesin is sprayed from the top to the bottom of the rotor D. When the spraying of the fluororesin onto the rotor D is completed, the chain A resumes its orbit and sends the rotor D into the heater G, where the fluororesin of the rotor D is dried and cured. Then, the rotor D is removed from the carrier B.

[0005]

[Problems to be solved by the device]

 However, the above coating apparatus has the following problems. ． Several rotors D (usually about 15) are taken out from the heater all at once, and they are attached to the carrier B one by one at the rotor mounting position P of the coating apparatus. The temperature of the rotor D does not drop so much that the fluororesin is sprayed, but the rotors D that are sequentially attached to the carrier B after that have a little extra time compared to the first rotor D. Then, since the fluororesin is sprayed, the temperature of the rotor D decreases. However, since the adhesion and spread of the fluororesin slightly change depending on the temperature of the rotor D, even if the spray nozzle F sprays the fluororesin on each rotor D equally, The rise will be slightly different depending on the rotor D, and the quality of the coating will vary. By the way, it usually takes about 3 minutes to remove 15 rotors D from the heater and attach all of them to the coating equipment. With things, there is a time gap of about 3 minutes. After all, when the resin is sprayed on the rotor D which is finally attached, the temperature of the rotor D drops considerably, and in this case, there arises a problem that the fluororesin sprayed on the rotor D drips. Sometimes .

[0006] A worker wears gloves or the like to take out the heated rotor D from the heater or attach it to the carrier B, but the temperature of the rotor D is around 100 ° C, so the worker is burned during the work. There is a risk of Moreover, if work is performed with caution, the work speed will be slowed down, and the problems described above will eventually be magnified. Also, a heater for heating the rotor D must be installed near the coating device, but since the heater is quite large, it requires a large space.

An object of the present invention is to provide a coating apparatus that does not cause coating variations and does not cause problems such as exhaustion.

[0008]

[Means for Solving the Problems]

 As shown in FIG. 1, the coating apparatus of the present invention includes a carrier device 2 for carrying a work 1, a spray nozzle 3 for spraying paint onto a heated work 1 carried by the carrier 2, and a spray nozzle 3 for spraying the paint. A high-frequency heating device for heating the work 1 on the front side in the conveying direction from the spraying nozzle 3 in a coating device equipped with a drying unit 4 for drying and hardening the paint on the work 1 sprayed with the nozzle 3 5, the heating unit 6 is formed in a ring shape having a diameter larger than that of the work 1. The heating unit 6 covers the outer circumference of the work 1 when descending and moves up and down so as to come off the work 1 when rising. It is characterized by making it possible.

[0009]

[Action]

 In the coating apparatus of the present invention, when the work 1 is set on the transfer device 2, the work 1 is moved below the high-frequency heating device 5, and then the heating section 6 of the device 5 is lowered to remove the work 1. The work 1 is covered on the outer periphery and the work 1 is heated to a predetermined temperature. When heating is completed, the heating unit 6 rises and comes off the work 1, and the work 1 is moved by the carrier 2 to the spray nozzle 3, where the spray nozzle 3 applies the coating to the work 1. Be sprayed. The work 1 on which the paint has been sprayed is again transported by the transport device 2, and the drying section 4 subsequently dries and cures the paint. As described above, in the coating apparatus, when the work 1 is set, the heating, spraying of the paint, and drying / curing of the paint are automatically performed thereafter, which is convenient. Since the paint is sprayed by the spray nozzle 3 immediately after being heated by, the work 1 does not become cold before spraying the paint, and the temperature at the time of spraying the paint is different for each work 1. The problem of being different does not occur.

[0010]

【Example】

 An embodiment of the coating apparatus of the present invention will be described in detail with reference to FIGS. Reference numeral 1 shown in FIG. 1 denotes a rotor (workpiece) incorporated in a compressor of an automobile air conditioner, and a rotary shaft 1b projects from both axial ends of a cylindrical main body 1a (same as the rotor in FIG. 3). Things).

Reference numeral 2 shown in FIG. 1 denotes a carrying device for carrying the rotor 1. In this device, a plurality of transporting bodies 21 each formed in a cylindrical shape having a sharp tip around a chain 20 revolving in the direction of the arrow a in the figure are rotatably mounted in the direction of the arrow b in the figure with a plurality of intervals. Therefore, every other metal pipe 22 is attached to the tip of the carrier 21, and the rotating shaft 1b of the rotor 1 is inserted into the metal pipe 22. The rotor 1 attached to the carrier 21 moves in the direction of the arrow a together with the chain 20 and passes through the high-frequency heating device 5, the spray nozzle 3, and the drying unit 4 which will be described below.

Reference numeral 3 shown in FIG. 1 is a spray nozzle, and two spray nozzles are arranged at intervals in the middle of the transport path of the transport device 2 (not shown, each spray nozzle 3 is also vertically disposed. It can be moved back and forth). A liquid supply tube 23 is attached to the spray nozzle 3, and the fluororesin sent to the tube 23 is atomized from the tip of the nozzle. A rotary belt 25 is installed along the transport path of the transport device 2 below the spray nozzle 3 along the transport path, and the rotary belt 25 of the transport body 21 passing therethrough. The carrier 21 can be rotated in the direction of arrow b in the figure by contacting the side surface.

Reference numeral 4 shown in FIG. 1 is a heater, which is installed on the conveying path ahead of the spray nozzle 3. The drying unit 4 heats the rotor 1 sprayed with the fluororesin by the spray nozzle 3 to dry and cure the fluororesin.

Reference numeral 5 shown in FIG. 1 denotes a high-frequency heating device, which is installed on the conveying path on the front side of the spray nozzle 3. As shown in FIG. 2, the high frequency heating device 5 includes a power supply unit 10, an oscillation unit 11, a matching unit 12, and a heating unit 6, and the power supply unit 10 includes an oscillation unit 11 and a matching unit 12. It is independent of the heating device 14 including the heating unit 6.

The power supply unit 10 is a circuit that converts a three-phase, 200 V AC to a 350 V DC and outputs the converted current. The power supply unit 10 adjusts the current and voltage output by a controller (not shown) to desired values. You can do it.

The oscillating unit 11 is a circuit for converting a DC350V current output from the power supply unit 10 into a high frequency of 200 KHz. The high frequency output from the oscillating unit 11 is matched by a matching unit (also referred to as a matching unit) 12 for impedance matching. The high frequency output from the matching section 12 is output to the ring-shaped high frequency coil (heating section) 6.

The high frequency coil 6 is arranged above the carrier device 2 as shown in FIG. 1, and the high frequency coil 6 can be moved up and down by a lifting device (not shown).

[0018]

[Operation Example of Coating Apparatus of FIG. 1] When the rotors 1 are set on the conveyors 21 that move at the rotor mounting position P of the coating apparatus (every other in this embodiment), the conveyors 21 are individually set. The work 1 is sequentially moved to the heating unit 6 side of the high-frequency heating device 5, and when the first rotor 1 is located directly below the heating unit 6, the carrier 21 is temporarily stopped and the rotor 1 is subjected to high-frequency waves. It is stopped under the heating unit 6 of the heating device 5. Then, the heating unit 6 descends and covers the outer periphery of the rotor 1, and the switch of the power supply unit 10 of the high-frequency heating device 5 is turned on to heat the rotor 1 to about 100 ° C. by the high frequency. When the heating of the rotor 1 is completed, the heating unit 6 rises and comes out of the rotor 1. Subsequently, the transport body 21 restarts its movement, and the rotor 1 which has been heated is moved to the front of the spray nozzle 3 and stopped there. During this time, the carrier 21 is repeatedly moved, stopped, and moved, and the second and subsequent rotors 1 are sequentially heated by the heating unit 6 of the high-frequency heating device 5. The rotor 1 stopped right in front of the spray nozzle 3 is rotated in the direction of arrow b in FIG. 1 by the rotating belt 25, and the fluorine resin is sprayed on the entire circumference of the work 1 by the spray nozzle 3 which moves up and down. To be When the spraying of the resin onto the work 1 is completed, the carrier 21 moves again, the work 1 is moved to the drying section 4, and the coating material on the work 1 is dried and cured.

[0019]

[Effect of device]

 The coating device of the present invention has the following effects. ． By simply setting the work 1 on the carrier 2, the work 1 is heated, the paint is sprayed, the paint is dried, and the work is cured automatically, which leads to automation of the painting, speedup, and productivity. improves. ． Since the work 1 is heated immediately before the paint is sprayed, the temperature of the work 1 does not almost drop until the paint is sprayed, and the temperature does not vary from work to work 1. Is stable. ． The heating part 6 of the high-frequency heating device 5 covers the outer circumference of the work 1 and heats the whole work 1 uniformly, so that the paint is evenly adhered to the work 1 and no problems such as dripping occur. . ． Since a large heater for heating the work 1 is not required, the device can be downsized. ． Since the power supply unit 10 of the high-frequency heating device 5 is a separate body, if the power supply unit 10 is installed in another room, the coating device can be installed in a narrow space.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a coating apparatus of the present invention.

FIG. 2 is a block diagram showing an embodiment of a high-frequency heating device attached to the coating device of FIG.

FIG. 3 is a perspective view showing an example of a rotor.

FIG. 4 is a perspective view showing an example of a conventional coating apparatus.

[Explanation of symbols]

 1 Work 2 Transport Device 3 Spray Nozzle 4 Drying Part 5 High Frequency Heating Device 6 Heating Part

Claims (1)

[Scope of utility model registration request] 1. A transport device 2 for transporting a work 1, a spray nozzle 3 for spraying a coating onto a heated work 1 transported by the transport device 2, and a spray for spraying the coating by the spray nozzle 3. In a coating apparatus including a drying unit 4 that dries and cures the coating material of the work 1, a heating unit 6 of a high-frequency heating device 5 that heats the work 1 is provided on the front side of the spray nozzle 3 in the conveying direction, and the same heating is performed. The coating device is characterized in that the portion 6 is formed in a ring shape having a diameter larger than that of the work 1, and the heating portion 6 can be lifted up and down so as to cover the outer periphery of the work 1 when descending and to be separated from the work 1 when rising. .