JPS5855975Y2 - Paint film uniformity device for electrical parts coating equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for removing excess paint and making the coating uniform in a coating device for electrical parts having lead wires at both ends.

Various methods have been developed to apply insulating coatings to electrical parts, but all of them have drawbacks.
To date, there has not been a coating device of this type that has solved various problems such as process simplification, complete automation, and shortened coating time all at once.

In consideration of the above points, the present invention aims to simplify and automate the process by setting a linear conveyance path for electrical components, and to make the coating film uniform by removing excess paint adhering to electrical components. It is an object of the present invention to provide a coating device for electrical parts that can shorten the drying time of the paint by making the coating uniform.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view showing an example of the coating apparatus of the present invention, and FIG. 2 is a front view of the same.

In the figure, reference numeral 1 indicates two endless chains installed at a constant interval, which run across the entire device because all of the work processes are carried out on these chains, and are installed on the frame 2. It is hung by sprocket foil 3.

An unpainted electrical component 5 is placed on an electrical component transport frame 4 installed on the two endless chains 1, and is transported in the direction of the arrow as the chain 1 is transported.

A coating film is formed on the unpainted electrical components 5 placed on the transport frame 4 by contact rotation with the outer peripheral surface of the coating drum 6, and then a coating film uniforming device 7 is applied to remove excess coating material. This makes the coating film on the electrical parts uniform, and the coating is completed by passing it through a heat source 8 to dry it.

During this time, the electrical component 5 remains placed on the transport frame 4, and the transport frame 4 is continuously transported at a constant speed.

The above is the overall process of the coating device. Next, each process will be explained in detail.
As shown in the figure, it is composed of electrical component mounting sections 10 that are placed at regular intervals, and stays 11 that hold the electrical component mounting sections 10 at regular intervals.

The electrical component mounting section 10 is formed in an L shape, and has a rising surface 10.
A is provided with a large number of grooves 12 for placing electrical components at regular intervals, and a flat portion 10b is provided with a position regulating portion 10C bent downward to match the spacing of the chain 1. It is.

The installation spacing of the electrical component mounting portions 10, and hence the spacing of the chains 1, is determined by the length of the electrical component 5 and the length of the lead wire 5a, and the spacing between the grooves 12 is also determined in the same manner.

Note that a notch is provided in the groove 12 so that the electrical component 5 can be easily placed and taken out.

Although the electrical components 5 placed on the transport frame 4 are irregular, they are neatly arranged at predetermined positions by the electrical component alignment plate 14 before entering the coating drum 6.

The alignment plate 14 is composed of a pair of regulating plates having a distance corresponding to the length of the main body of the electrical component 5, as shown in FIG.

The detailed structure of the coating drum 6 is shown in FIG. 4, and FIG. 5 shows a central longitudinal section of the coating drum 6.

The coating drum 6 is attached to an angle 16 fixed to the frame 2.
The bell 20 is rotatably supported by a bearing 17 attached to the rotary shaft 18, and is driven to rotate by passing the bell 20 to a pulley 19 attached to one end of the rotating shaft 18.

bell) 20 is transported by a drive motor 20a.

Since the coating drum 6 has a step due to the large-diameter portion 5b formed at the end of the main body of the electrical component 5, the outer peripheral surface of the coating drum 6 is formed to follow the shape of the large-diameter portion 5b.

That is, the circumferential surface of the drum 6 corresponding to the large-diameter portion 5b is slightly stepped to make the coating layer uniform between the center and end portions of the electrical component 5.

In order to coat the end surfaces of the electrical components 5, flanges 6a are provided at both ends of the coating drum 6 to ensure uniform coating of the coating layer.

A liquid paint retainer 21 is installed at the bottom of the coating drum 6.

A paint film uniforming device 2 is used to form a substantially uniform paint film on the surface of the paint drum 6 immersed in the liquid paint reservoir 21.
2 is provided.

This uniformity device 22 includes a scraper 23 corresponding to the flange 6a of the coating drum 6, a scraper 24 corresponding to the center of the coating drum 6, and an adjustment screw 25 for adjusting the distance between the coating drum 6 and the coating drum 6. There is.

The electrical components on which a coating layer has been formed by coming into contact with the circumferential surface of the coating drum 6 continue to be transported by the transport frame 4, but since there is a possibility that excess paint may have adhered to the electrical components,
It enters a coating film uniformity device 7 to obtain a completely uniform coating film.

The coating film uniformizing device 7 is provided in three stages along the chain 1.

This number of stages can be changed as appropriate.

The coating film uniformity device 7 includes a rotating drum 6 as shown in FIG.
Discs 26 having approximately the same diameter are arranged at regular intervals, and the shafts 27 of these discs 26 are supported by bearings 28 attached to the angles 16 fixed to the frame 2.
Rotation is driven by passing a belt 30 around a pulley 29 attached to one end.

31 is a drive motor, and 32 is a drive pulley. Disk 2
The rotation speed of No. 6 is determined by taking into consideration the viscosity of the paint, the diameter of the electrical parts and the lead wire.

In this case, when the transport frame 4 is positioned on the disc 26, the electrical component 5 floats above the bottom of the groove 12 of the transport frame 4, rides on the disc 26, and rotates at high speed, causing excess paint to scatter in all directions. do.

As a countermeasure, there is a paint collection tray 3 on the bottom surface of the disc 26.
A scattering prevention plate 34 fixed to the frame 2 is attached above it, and a sponge 35 is attached to this prevention plate 34 to prevent paint splashes adhering to the prevention plate 34 from falling onto the electrical components 5 again. is pasted.

FIG. 7 shows a coating drying device for electrical components 5. As shown in FIG.

For example, an infrared lamp is used as the heat source 8, and the U bolt 36
It is fixed to the mounting plate 37 by.

In this case, in order to prevent uneven drying of the transferred electrical components 5, electrical component pushing plates 38 are provided on both sides, as shown in FIGS. 1 and 7.

Due to the presence of the push-up plate 38, the leads 5a of the electrical components 5 rise up from the bottom of the groove 12 and come into frictional contact with the push-up plate 38 as the transfer frame 4 is transferred. It begins to rotate.

Note that 39 in FIGS. 5, 6, and 7 indicates a stay for suppressing lateral vibration of the transport frame 4, and 40 in FIG. 7 indicates a stay for suppressing lateral movement of the electrical component 5.

Note that since the coating device of this example uses a long span tune, it is difficult to maintain a horizontal state.

For this purpose, support plates 41 are provided at necessary locations to prevent deflection.
It is necessary to provide

Next, to explain the operation of the present invention as described above, first, the necessary amount of paint is stored in the paint reservoir 21, and the drive motor 21 for the chain drive motor (not shown), the rotating drum, and the coating uniformity device is , 31 to rotate the chain 1, rotating drum 6, and disk 26.

Therefore, the transport frame 4 installed on the chain 1 starts to transport.

Since the electrical components 5 are placed on the transport frame 4, they are transported together.

The electrical components 5 then pass through the aligning plate 14 to the coating drum 6.
enter.

In this case, the electrical component 5 placed in the groove 12 of the transport frame "4" begins to come into contact with the surface of the coating drum 6, and the lead wire 5a rises from the groove 12, and as the coating drum 6 rotates. The electrical component 5 itself also begins to rotate, and eventually paint will adhere to the surface of the electrical component.

On the other hand, a paint film of a constant thickness is formed on the surface of the coating drum 6 by the scrapers 23 and 24.

Since the coating drum 6 is provided with flanges 6a at both ends, uniform paint is also applied to the end surfaces of the electrical components 5 that are in contact with the flanges 6a.

In FIG. 5, H (indicated by a dotted line) indicates a coating layer.

The electrical component 5 on which the paint film layer has been formed is transferred together with the transport frame 4 to a coating uniformity device 7, which is the next step.

Here, when the electric component 5 approaches the disk 26, the lead wire 5a rides on the outer peripheral surface of the disk 26 and becomes floating above the bottom of the groove 12.

Therefore, due to the frictional resistance on the outer circumferential surface of the disk 26, the disk 26 is rotated as the disk 26 rotates, and any excess paint adhering to the electric component 5 is scattered by centrifugal force.

This step is repeated for the number of discs 26, and in this embodiment, it is performed three times, so that the surface coating of the electrical component 5 is uniform before the next drying step.

Next, the electrical component 5 with a uniform coating layer is transferred to the drying device together with the transport frame 4, where the push-up plate 3
8 raises the lead wire 5a of the electrical component 5 from the bottom of the groove 12.

Therefore, as the conveyance frame 4 moves, the electric component 5 is rotated by the frictional resistance at the upper edge of the push-up plate 38, so that when it passes over the heat source 8, it is heated uniformly and dried evenly.

After the drying device, the dried electrical parts 5 are removed from the chain 1 together with the transport frame 4, and the painting process is completed.

As described above, according to the present invention, the electric component on which the coating film has been formed is lifted up from the bottom of the groove of the conveying frame by the disk using the lead wire part, and the electric component is rotated by rotating the disk. Since the conveyor frame is rotated as the transport frame advances, excess paint can be scattered by centrifugal force, making the paint film uniform, shortening drying time, and improving product value. It has the effect of

[Brief explanation of the drawing]

Fig. 1 is a plan view of the entire electrical parts coating device, Fig. 2 is a front view of the same as above, Fig. 3 is a perspective view showing an example of the conveyance frame, Fig. 4 is a side view of the coating drum, and Fig. 5 is the same as above. 6 is a longitudinal sectional view showing an example of a coating film uniformizing device according to the present invention, and FIG. 7 is a longitudinal sectional view showing an example of a coating film drying device. 4...Transportation frame, 5...Electrical components, 26...Disc plate.

Claims (1)

[Scope of utility model registration request] Electrical components with a coating film formed on their outer peripheral surfaces are transported by a transport frame with their lead wires inserted into the grooves,
The electrical component is rotated by the frictional resistance of the disk that comes into contact with the lead wire of the transferred electrical component and rotates at a relatively high speed while floating above the bottom of the groove of the transportation frame, and the centrifugal force is generated. A coating uniformity device used in electrical parts painting equipment that scatters excess paint adhering to the outer circumferential surface of electrical parts.