JPS63166461A - Powder painting apparatus - Google Patents

Abstract

PURPOSE:To enhance the heat efficiency of a heating oven, by providing a rotary body intermittently rotating in the heating oven and performing the feed-in and feed-out of a work between the first and second feed means at the time of the intermittent rotation of the rotary body. CONSTITUTION:The holder 2 having a work fed by the first work feed means 7 suspended therefrom is supplied to the engaging part 38a of the rotary body 38 in a heating oven 20 by a feed-in and feed-out means. The work engaged with the engaging part 38a of the rotary body 38 is heated while recirculated and fed by the intermittent rotation of the rotary body 38. The work after heating is detached from the engaging means 38a of the rotary body 38 by the feed-in and feed-out means to be delivered to the second work feed means 21. Further, powder paint is sprayed to the work after heating held to the second work feed means 21 by a powder painting means 52 to perform powder painting of the work.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a powder coating device that applies powder coating to a heated workpiece for coating.

"Prior Art" As an example of a powder coating method, the fluidized dipping method is already well known. In this fluidized dipping method, powder coating is stored in a dipping container, compressed air is supplied into the dipping container from below, the powder coating is suspended in the air stream at a required height, and the suspended powder is The powder coating is applied by immersing a workpiece heated to a required temperature in the body paint so that the powder coating adheres to the workpiece.

A conventional powder coating device for carrying out the above powder coating method generally includes an endless conveyor that is conveyed intermittently, and hangers that are attached to the endless conveyor at predetermined intervals. With the work suspended from each hanger, the work is carried into the heating furnace together with the hanger and heated. Further, a powder coating means is disposed downstream of the heating furnace, and powder coating is applied to the work heated by the powder coating means to apply the powder coating.

``Problems to be Solved by the Invention'' However, in conventional powder coating equipment, not only the workpiece but also the hanger and part of the endless conveyor pass through the heating furnace. Heat was carried away to the outside, resulting in poor thermal efficiency and being uneconomical.

"Means for Solving the Problem" In view of such circumstances, the present invention aims to improve the thermal efficiency of the heating furnace by preventing the transport means for transporting the work from passing through the heating furnace together with the work. It was planned.

That is, the present invention includes a first workpiece conveying means that intermittently conveys the workpiece before heating at predetermined intervals, a rotating body that rotates intermittently, and engagements formed at predetermined intervals on the outer periphery of the rotating body. a heating furnace that holds a workpiece in a joint portion and heats the workpiece held in each engagement portion while being circulated and conveyed by intermittent rotation of the rotating body; and a second workpiece conveyance means that conveys the heated workpiece. , holding the heated workpiece in the heating furnace, disengaging it from the engaging portion of the rotating body and taking it out of the heating furnace, and delivering it to the second workpiece conveying means; a loading/unloading means for holding the transported unheated workpiece, carrying it into the heating furnace, and supplying the workpiece to the engaging portion of the empty rotating body; and the second workpiece conveying means. A powder coating means is provided midway and applies powder coating to the workpiece held by the second workpiece conveyance means.

"Function" According to such a configuration, the workpiece transported by the first workpiece transporting means can be supplied to the engaging part of the rotating body in the heating furnace by the loading/unloading means, and the The workpiece engaged with the engaging portion of the body is heated while being circulated and conveyed in the heating furnace by the intermittent rotation of the rotating body.

The workpiece heated in the heating furnace is separated from the engaging portion of the rotating body by the loading/unloading means and delivered to the second workpiece conveying means, and further held by the second workpiece conveying means by the powder coating means. Powder coating is applied to the workpiece and powder coating is applied.

Therefore, unlike in the past, the conveying means for conveying the workpiece does not pass through the heating furnace together with the workpiece, so it is possible to improve the thermal efficiency of the heating furnace and reduce running costs.

``Embodiment'' The present invention will be described below with reference to the illustrated embodiment. In FIGS. 3 to 5, a holder 2 that holds and suspends a rod-shaped work 1 (see FIG. 7) is composed of two members. 2a,
2b, by fitting the upper cylindrical part of the work 1 into the half-cylindrical part formed at the lower end of each member 2a, 2b and tightening both members 2a, 2b with bolts 3. The work 1 is connected to the holder 2. Further, the holder 2 is formed with two annular grooves 2C12d on the upper and lower sides, and furthermore, a cross-shaped engagement protrusion 2e is formed on the upper end surface.

As shown in FIGS. 1 and 2, the lower annular groove 2d formed in the holder 2 is engaged with an engagement groove 6 formed in a straight line in the machine frame 5 manually or by an appropriate conveyance device, 1st
The workpiece conveying means 7 intermittently conveys the workpiece 1 in a suspended state along its engagement groove 6.

The first workpiece conveyance means 7 includes a cylinder device 8 arranged and fixed above and along the engagement groove 6,
As shown in FIG. 2, a plurality of engagement pawls 10 are attached at predetermined intervals to an operating member 9 that is reciprocated along the engagement groove 6 by this cylinder device 8.

Each of the above-mentioned engaging claws 1O is normally directed downward to the above-mentioned holder 2.
From the lower position, it can be rotated approximately 90 degrees only counterclockwise in FIG. 2.

Therefore, each engaging claw 10 is
When the is moved to the right, each engaging claw lO engages with each holder 2 and moves it to the right as a unit, and when each engaging claw lO is moved to the left by the cylinder device 8, , each engaging claw lO
rotates counterclockwise and moves to the left beyond each holder 2, leaving each holder 2 in its position. As a result, each holder 2 is intermittently conveyed to the right by a predetermined distance by the reciprocating operation of each engaging claw 10 by the cylinder device 8.

At a lower position of the engagement groove 6, there is provided a primer application means 2 for applying a primer to the workpiece 1 suspended from the holder 2 so as to coincide with the intermittent stop position of the holder 2.

The primer application means 12 includes a container 13 containing a primer and a cylinder device 14 for raising and lowering the container 13.
Holder 2 intermittently transported by workpiece transport means 7
When the container 13 is stopped, the container 13 is raised and lowered so that the workpiece 1 can be relatively immersed in the primer in the container 513.

As shown in FIG. 1, the engagement groove 6 formed in the machine frame 5 has its right end bent at a right angle and is continuous with the engagement groove 16. The cylinder device 17 disposed in the longitudinal direction of the cylinder device 16 constitutes the first workpiece conveying means 7 together with the cylinder device 8, and carries the holder 2 which has been intermittently conveyed to the bending portion by the cylinder device 8. It can be moved forward along the engagement groove 16.

At the tip of the piston rod, the cylinder device 17 has a
A first fork 18 is provided that engages with the annular groove 2c above the holder 2 to suspend it, and while the holder 2 is suspended by the first fork 18, the holder 2 is suspended from the engagement groove 16.
The loading/unloading means 19 provided in front of the
It is now possible to deliver to.

The loading/unloading means 19 receives the holder 2 from the first fork 18 and transfers it together with the work 1 to the heating furnace 20.
The workpiece 1 carried into the heating furnace 20 and heated by the heating furnace 20 is carried out from the heating furnace 20, and the first fork 18
A second workpiece conveying means 21 located at a position opposite to
One heated workpiece can be delivered to the second fork 22 of the second fork 22. This second fork 22
are moved forward and backward by a cylinder device 23, as will be described in detail later.

As shown in FIGS. 6 and 7, the loading/unloading means 19 is a gripping means for gripping the lower annular groove 2d of the holder 2 supplied with the upper annular groove 2c held by the first fork 18. 26 and the holder 2 gripped by the gripping means 26 by moving the gripping means 26 back and forth a large amount into the heating furnace 2.
The main cylinder device 27 (FIG. 7) is provided for carrying the holder 2 into the heating furnace 2° and carrying it out from the heating furnace 2°.

Further, when the holding means 26 carries out the holder 2 from the heating furnace 20 and the second fork 22 holds the holder 2, the carrying-in/out means 19 slightly retreats the holding means 26 and the second fork 22 holds the holder 2. A sub-cylinder device 28 for allowing the holder 2 to be carried out by the two forks 22 is provided.

The gripping means 26 is provided on a sub-plate 29, and includes a fixed claw 30 fixed to the sub-plate 29, a gripping claw 31 provided to be able to open and close the fixed claw 30, and an opening/closing mechanism that opens and closes the gripping claw 31. A cylinder device 32 is provided. When the holder 2 is supplied with the upper annular groove 2c held by the first fork 18 while the gripping claw 31 is open, the gripping weight 31 is closed by the opening/closing cylinder device 32. Holder 2
The lower annular groove 2d can be gripped.

Further, the sub-cylinder device 28 is connected to the sub-plate 2.
The sub-cylinder device 28 and the sub-plate 29 are connected to the main plate 33.
The main plate 33 is moved forward and backward by the main cylinder device 27.

Next, as shown in FIG. 2 and FIG. 6, the heating furnace 20 is equipped with a door 37 that is opened and closed by a cylinder device 36. The rotating body 38 is rotatably driven. The rotating body 38 is provided with retaining portions 38a at equal intervals on its outer circumference, which engage with the annular groove 20 above the holder 2.
The workpiece 1 can be heated while holding the holder 2 delivered from the gripping means 26 and intermittently conveying it.

An arcuate guide 39 is attached to the outer periphery of the rotating body 38 except at the workpiece transfer position between the carrying in/out means 19 and the gripping means 26, from which the holder 2 held by the engaging part 38a falls off. I try not to have anything to do.

In the above configuration, the carrying in/out means 19 first carries out the already heated boulder 2 from the rotating body 38 in the heating furnace 20 and delivers it to the second fork 22 on the downstream side, and then transfers it to the second fork 22 on the downstream side. A new holder 2 is received from the first fork 18 and carried into the rotating body 38 in the heating furnace 20.

That is, the gripping claw 31 is opened and closed by the opening/closing cylinder device 32.
is opened and the sub plate 29 and the gripping means 35 are moved to the forward end position by the sub cylinder device 28. When the door 37 of the heating furnace 20 is opened by the cylinder device 36, the main cylinder device 27 advances the main plate 33 and the gripping claws 31 enter the heating furnace 20.

Then, between the released gripping claw 31 and the fixed claw 30,
When the lower annular groove 2d of the holder 2 held by the engaging portion 38a of the rotating body 38 is relatively inserted, the gripping claws 31 are closed by the opening/closing cylinder device 32 to hold the holder 2, and then The main plate 33 is moved back by the main cylinder device 27, and the holder 2 is disengaged from the engaging portion 38a and carried out from the heating furnace 2o. Thereafter, the door 37 of the heating furnace 20 is closed by the cylinder device 36.

When the main plate 33 reaches the backward end with the sub-plate 29 located at the front road end, the second fork 22 on the downstream side is advanced and the annular groove 2c above the holder 2 is moved forward.
engage with. Then, the opening/closing cylinder device 32 releases the grip of the holder 2 by the gripping claws 31, and when the sub-plate 29 is subsequently retracted from the forward end by the sub-cylinder device 28, the second fork 22 becomes in a retractable state.

In this state, the second fork 22 holding the holder 2 is retracted by the cylinder device 23 to completely receive the work 1 heated in the heating furnace 20 from the gripping means 26, and the second fork 22 When the sub-plate 2 is retracted, the gripping claw 31 remains open and the sub-plate 2 is moved back.
9 is moved to the front roadside.

When the sub-plate 29 is moved to the forward end with the gripping claw 31 left open, the first fork 18 on the upstream side is moved forward and the holder 2 held by it is inserted between the gripping claw 31 and the fixed claw 30. Then, the gripping claws 31 are closed by the opening/closing cylinder device 32 to grip the holder 2.

Thereafter, when the door 37 of the heating furnace 2o is opened, the main cylinder device 27 is activated to carry the holder 2 gripped by the gripping means 26 into the heating furnace 20,
The holder 2 is supplied to the engaging portion 38a which has become empty after being carried out.

When the gripping claws 31 are released with the holder 2 engaged with the engaging portion 38a, the main plate 33 is retracted to the retracted position, the gripping means 26 is carried out from the heating furnace 2o, and then the cylinder device 36, the door 37 of the heating furnace 20 is closed again.

In this state, the main plate 33 is located at the rearward end,
Since the sub-plate 29 is located at the forward end and the claw gripping claws 31 are in the open state, they return to their initial state, and the rotating body 38 is intermittently rotated by the distance between the respective engaging portions 38a. The next workpiece 1 that has been rotated and has already been heated
Then, the holder 2 is positioned at the ejection position.

As can be understood from the above explanation of the operation, the loading/unloading means 19 simply takes the holder 2 into and out of the heating furnace 20, so the holder conveying means passes through the heating furnace together with it and is heated. Compared to conventional devices, the thermal efficiency of the heating furnace 20 can be increased, and running costs can be reduced.

However, as shown in FIG. 8, the second fork 22 on the downstream side is mounted on a movable plate 42 so as to be able to swing up and down with a pin 43, and the movable plate 42 is mounted on a support plate 44. It is attached so that it can freely move forward and backward toward the loading/unloading mechanism 19 side.

A support bracket 45 is attached to the support plate 44 so as to straddle the movable plate 42 (FIG. 9), and the cylinder device 23 is attached to the support bracket 45 so as to be interlocked with the movable plate 42.

The second fork 22 is normally located in a horizontal state, and in this state is moved forward and backward by the cylinder device 23 so that it can receive the holder 2 as described above. The second fork 22 is provided with a roller 46 at a position where the holder 2 is held in contact with the upper and lower cylindrical surfaces of the holder 2 to support its rotation.

As shown in FIG. 1, the support plate 44 is slidably attached to two guide rails 47 arranged parallel to the engagement groove 6, and a motor (not shown) is attached to the support plate 44. An interlocked endless chino 48 (Fig. 8) is connected.

The support plate 44 is moved forward and backward along the guide rail 47 by an endless chino 48, and has two locations: a receiving position A where the holder 2 is received from the heating furnace 20, and a workpiece 1.
The workpiece 1 is moved to a coating position B where powder coating is applied to the workpiece 1, and a delivery position C where the coated workpiece 1 is delivered to a conveying means on the downstream side.

A powder coating means 52 is provided at the coating position B, and as shown in FIG. a collection tank 54 for collecting the powder paint sprayed by the hopper 53;
Further, a workpiece rotation drive means 56 is provided on the support bracket 45 and rotates the workpiece 1.

The recovery tank 54 is provided on the machine frame 5 so as to be able to rise and fall freely,
When the work 1 suspended from the second fork 22 is carried above the collection tank 54 and stopped, it is lifted by the lifting cylinder device 57 provided between the machine frame 5 and the collection tank 54, and The work l can be accommodated inside.

By the way, as shown in FIG. 8, the second fork 22 is integrally provided with arms 60 on both sides of its lower part, and a cam follower 61 is provided at the tip of each arm 60. The cam follower 61 provided at the tip of each arm 60 is
As shown in FIG. 1θ, it can come into contact with the upper end of a lifting rod 62 that is provided on the machine frame 5 so as to be able to rise and fall freely, and the lower end of this lifting rod 62 can come into contact with a cam member 63 that is attached to the collection tank 54. It is possible to touch it.

When the collection tank 54 is raised by the cylinder device 57, the cam member 63 is moved up by the cam follower 6.
1, and as it rises, the second fork 22 swings about the pin 43, thereby tilting the work 1 suspended from the second fork 22 as shown by the imaginary line. I'm trying to do that.

Further, a support bracket 45 provided on the support plate 44
includes a cylinder device 2 that moves the second fork 22 forward and backward.
A motor 64 constituting the workpiece rotation driving means 56 is obliquely mounted above the work rotation drive means 3, and a cross-shaped engagement protrusion 2e formed on the upper end surface of the holder 2 is attached to the tip of the rotation shaft of the motor 64. An engagement clutch 65 to be engaged is attached.

Therefore, as described above, the second fork 22 is
3, the engagement protrusion 2e of the holder 2 comes to engage the engagement clutch 65, and by rotating the motor 64 in this state, the holder 2 and the workpiece 1 are rotated. can be rotated while the cylindrical surface of the holder 2 is supported by the roller 46 described above.

On the other hand, the hopper 53 has two upper and lower hopper parts 53a and 53b, as shown in FIGS. 11 and 12, and a cylindrical body 66 is attached to the lower end opening of the upper hopper part 53a. , and a rotating body 67 is rotatably and tightly fitted into the cylindrical body 66. As shown in FIG. 12, this rotating body 67 is interlocked with a motor 71 via a sprocket 68 attached thereto, a chain 69 that spans the sprocket 68, and a sprocket 70 that meshes with the chain.

Further, an upper hopper portion 3 is provided at the upper and lower positions of the cylindrical body 66.
A slit 72 that communicates with the interior of the rotating body 67 and a slit 73 that communicates with the lower hopper portion 53b are formed along the axial direction, and a plurality of slits each having a required volume are formed on the outer peripheral surface of the rotating body 67 along the axial direction. A measuring groove 74 is formed.

Therefore, when the rotary body 67 is rotated by the motor 71, the powder paint in the upper hopper portion 3a flows into the measuring groove 74 in the rotary body 67 through the slit 72.
Furthermore, when the metering groove 74 overlaps the lower slit 73 due to the rotation of the rotating body 67, the powder coating material in the metering groove 74 flows into the lower hopper portion 53b. By appropriately setting the rotational speed of the rotating body 67, the amount of powder coating material supplied from the upper hopper section 53a to the lower hopper section 53b can be adjusted.

Furthermore, a shutter 75 for opening and closing the opening of the lower hopper section 53b is provided. This shutter 75
is swingably attached to the hopper section 53b via a pin 76, and a cylinder device 77 is provided between the shutter 75 and the hopper section 53b.
By swinging the shutter 75 back and forth, the opening of the hopper section 53b can be opened and closed.

Next, the above-mentioned supply means 55 circulates and supplies the powder coating material dropped from the opening of the lower hopper section 53b and collected in the lower recovery tank 54 to the upper hopper section 53a.
As shown in Figure O, the bottom of the recovery layer 54 and the hopper part 53a
A flexible conduit 80 that communicates with the upper part of the hopper part 3a has one end connected to the suction port of a vacuum pump 81, and the other end connected to the hopper part 3a through a labyrinth 82 and a screen 83 provided in the upper part of the hopper part 3a. 3a.

The flexible conduit 80 allows the collection tank 54 to move up and down, and the vacuum pump 81 is operated with the shutter 75 closed to remove the powder paint collected in the collection tank 54. Hopper section 53 via conduit 80 due to negative pressure
It is designed to be sucked in. At that time, the powder paint sucked into the hopper section 53 from the conduit 80 is transferred to the labyrinth 82.
Most of the powder paint is separated from the suction air flow and falls downward, and the powder paint that has flowed into the labyrinth 82 is prevented from being sucked into the vacuum pump 81 by the screen 83.

Therefore, in the above configuration, as described above, when the second fork 22 receives the holder 2 carried out from the heating furnace 20 at the receiving position A, the second fork 2
2 is moved from the receiving position A to the painting position B.

At this time, the shutter 75 of the hopper 53 is closed, and the recovery tank 54 is located at the lower end position.

Then, the second fork 22 is at the painting position B, and the workpiece 1 held by the second fork 22 is collected [54
When the collection tank 54 is located above the lifting cylinder device 5
7 and accommodates the work 1 therein.

When the recovery tank 54 is raised, the cam member 63 attached thereto engages with the cam follower 61 attached to the second fork 22 to raise it, and as it rises, the second fork 22 is raised. Rock upward. As a result, the engagement protrusion 2e of the holder 2 held by the second fork 22 engages with the engagement clutch 65 that is interlocked with the motor 64, and the workpiece 1 is tilted at a position below the hopper portion 53.

In this state, the motor 64 is rotationally driven to rotate the holder 2 and the workpiece 1. In addition, the hopper section 5
The motor 71 provided at 3 is started and rotates the rotating body 67, and the powder coating material in the upper hopper section 3a is supplied to the lower hopper section 53b according to the rotation speed, and the cylinder device 77 is used to close the shutter. 75 is opened, and the powder paint in the lower hopper portion 53b is sprayed onto the rotating workpiece 1 by its own weight.

At this time, the powder coating comes to adhere to the rotating workpiece 1 in the area shown by diagonal lines in FIG. By maintaining the conditions substantially constant, the paint can be deposited in a substantially straight line.

Since the contact time between the powder coating and the workpiece 1 is substantially constant over the entire coated surface, the thickness of the coating can be made uniform.Moreover, in this example, the workpiece 1 is tilted. Therefore, it is possible to prevent powder paint from adhering to the lower end surface 1a of the workpiece 1. Note that the lower end surface 1a
If it is necessary to apply a powder coating to the lower end surface 1a, a blower may be provided to spray the powder coating toward the lower end surface 1a.

When the spraying of the powder coating onto the workpiece 1 is completed as described above, the rotation of the rotating body 67 is stopped, the shutter 75 is closed, and the rotation of the workpiece 1 is also stopped.

In this state, at the same time as the collection tank 54 is lowered,
Accordingly, the second fork 22 is returned from the inclined state to the horizontal state.

When the collection layer 54 reaches the lower end position, the vacuum pump 81 is activated, and the powder paint in the collection tank 54 is sucked into the upper hopper portion 3a through the conduit 80 by negative pressure, and a new workpiece 1 is collected. The work is completed and the operation of the vacuum pump 81 is stopped before the material is transported into the recovery layer 54.

On the other hand, workpiece 1, which has been coated with powder paint, is
When the fork 22 moves from the painting position B to the delivery position C, it is carried out from the collection layer 54, and when the second fork 22 reaches the delivery position C, the holder 2 held by it is separated from the second fork 22. being the first
It is delivered to a cooling conveyor 89 via a delivery device 88 shown in the figure.

The second fork 22 from which the holder 2 has been removed moves from the delivery position C past the painting position B to the original receiving position A.
The receiving position A receives a new workpiece 1 taken out from the heating furnace 20 again.

Next, at the delivery position C, an engagement groove 90 that engages with the annular groove 2d below the holder 2 is formed in the machine frame 5 described above. The engagement groove 90 is formed diagonally in a direction away from the second fork 22 from a position where it can be engaged with the annular groove 2d of the holder 2 held and conveyed by the second fork 22. The inclined portion is formed parallel to the moving direction of the second fork 22 from the tip thereof.

The delivery device 88 provided at the delivery position C includes a cylinder device 91 arranged parallel to the moving direction of the second fork 22, and a pressing member 92 attached to the tip of the piston rod. The member 92 allows the holder 2 to be moved along the engagement groove 90.

Further, the cooling conveyor 89 includes an endless chain 93 that circulates intermittently in a horizontal plane, and is provided at predetermined intervals on this chain 93, and engages with the annular groove 2C above the holder 2 to hold it. Each bracket 94 stops at a position facing the engagement groove 90 and can receive the holder 2 moved by the delivery device 88.

Therefore, when the holder 2 is held by the second fork 22 and transported to the delivery position C, the holder 2
The lower annular groove 2d engages with the engagement groove 90, and the holder 2 moves forward relative to the second fork 22 due to the inclined portion of the engagement groove 90 as the second fork 22 moves. and then they will be separated.

Then, when the holder 2 is separated from the second fork 22,
The cylinder device 91 of the delivery device 88 is operated, the pressing member 92 moves the holder 2 along the engagement groove 90, and the cooling conveyor 89 is waiting in front of the engagement groove 90.
The holder 2 is delivered to the bracket 94 of. Thereafter, the cooling conveyor 89 transports the holder 2 intermittently, and the workpiece 1 is gradually cooled during this time.

"Effects of the Invention" As described above, according to the present invention, the holder conveying means does not pass through the heating furnace integrally with it to be heated. The effect is that the thermal efficiency of the heating furnace can be increased, and running costs can therefore be reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention, and Fig. 2 is a plan view showing an embodiment of the present invention.
3 is a partially sectional front view showing the holder 2 disassembled into two members 2a and 2b, and FIG. 4 is the member 2b of FIG. 3.
, FIG. 5 is a top view of the holder 2, FIG. 6 is an enlarged plan view of the main part of FIG. 1, FIG. 7 is a partially sectional front view of FIG. 6, and FIG. Figure 9 is a right side view of Figure 8, Figure 1θ is a view taken in the X direction of Figure 1, Figure 11 is a cross-sectional view taken along line ■-■ of Figure 1, Half sectional view along, 1st
2 is a sectional view taken along the line X[[-Xll of FIG. 11. 1... Work 2... Holder 7...
First workpiece conveyance means 10--Engaging claw i a--First fork 19--Carrying in/out means 20--Heating furnace 22--Second fork 2 B--Gripping means 37--Door 38・-Rotating body
38a - Engagement part 52 - Powder coating means
53--Hopper 54--Recovery tank
55--Supplying means 56--Work rotation driving means Fig. 5 Fig. 4

Claims (2)

[Claims] (1) A first workpiece conveyance means that intermittently conveys the workpiece before heating at predetermined intervals, and a rotating body that rotates intermittently inside, and engaging portions formed at predetermined intervals on the outer circumference of the rotary body. a heating furnace that holds a workpiece and heats the workpiece held in each engaging portion while circulating and conveying it by intermittent rotation of the rotary body; a second workpiece conveyance means that conveys the heated workpiece; A heated workpiece is held in the heating furnace, and the workpiece is disengaged from the engaging portion of the rotating body, taken out from the heating furnace, and delivered to the second workpiece conveyance means, and is conveyed by the first workpiece conveyance means. A loading/unloading means for holding the unheated workpiece that has been heated and transporting it into the heating furnace, and supplying the workpiece to the engaging part of the empty rotating body; established,
A powder coating device comprising powder coating means for applying powder coating to the workpiece held by the second workpiece conveyance means and applying powder coating to the workpiece. (2) a workpiece rotation drive means for causing the powder coating means to rotate the workpiece held by the second workpiece conveyance means;
A hopper located above the workpiece sprays powder paint onto the workpiece; a collection tank provided below the hopper that collects the powder paint from the hopper; and a collection tank that collects the powder paint collected in the collection tank. The powder coating apparatus according to claim 1, further comprising a supply means for circulatingly supplying the powder to the hopper.