JPH0113573Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electrostatic coating device for coating the outer peripheral surface b and side surface c of an object to be coated, such as a motor rotor or stator, with a rust-preventing insulating paint as shown in Fig. 1. Moreover, the side surface c is coated thickly and the outer circumferential surface b is coated thinly.

Conventionally, there has been a coating device of this type as shown in FIG.

This consists of a conveyor A that transports the object to be painted while rotating, a powder paint adhesion section C to which an electrostatic spray gun B is attached, and an outer circumferential surface b of the object to be painted (this part is a paint removal section D that removes paint adhering to parts (parts that do not require painting); a melt-hardening section E that melts and hardens the paint adhering to the side surface c of the object a to be painted by high-frequency induction heating; a conveyor and the object a to be painted; It consists of an air blow cleaning section F, etc., which collects powder paint adhering to a mask e (Fig. 1) placed over the shaft d of the machine.

The paint removal section D is provided with a plate spring-shaped contact body G as shown in FIG. It is designed to remove adhering powder paint.

However, if the powder coating on the outer circumferential surface b is completely removed, that portion may rust due to changes over time. Therefore, recently there has been a demand for leaving a thin coating on the outer circumferential surface b rather than completely removing the powder coating.

However, the powder paint adhesion part C is the electrostatic spray gun B.
Since powder paint is ejected from the paint and applied to the entire object a, it is not possible to apply it thickly to the side surface c of the object a and apply it thinly only to the outer circumferential surface b, as in the past.

Therefore, in order to apply the powder coating thickly to the side surface c and thinly to the outer circumferential surface b using the conventional powder coating part C, for example, one of the side surfaces c and the outer circumferential surface b is coated, and the other uncoated surface is coated. Apply the powder coating to the desired thickness on the surface, then reverse the surface to be coated and apply the powder coating to another surface that was not coated last time, or apply the powder coating to the side surface c and the outer peripheral surface b. The powder coating must be applied to the same thickness on the outer circumferential surface b, and then only the powder coating on the outer circumferential surface b must be thinly shaved off.

However, in the former method, the side surface c and the outer circumferential surface b must be coated alternately, resulting in a two-step adhesion process, resulting in poor workability and the hassle of having to perform coating work that previously did not have to be done. Therefore, it is not practical.

With the latter method, it may be difficult to scrape the powder paint to a uniform thickness, or there is a limit to how thin it can be scraped, or if the powder paint on the side c is peeled off when scraping the powder paint on the outer circumference b. There is a problem.

The present invention solves these problems and allows powder paint to be applied thickly to the side surface c and thinly to the outer circumferential surface b by simply passing the object a to be coated through the powder paint adhesion part C as in the past. This is what I did.

Therefore, in the present invention, as shown in FIG. 4, a paint removal section 1 is provided midway within a powder paint application section 2 for depositing powder paint onto an object a to be painted.

The paint removal section 1 shown in FIG. 4 has a plate-shaped contact body 1a whose lower end is curved in an arc shape to provide elasticity and is mounted downward, and the lower end of the plate-shaped contact body 1a is attached to the object a to be coated which passes through the inside of the powder paint adhesion section 2. It is arranged to come into contact with the outer circumferential surface b.

The shape and structure of the contact body 1a are not limited to this, and may be selected as appropriate. The direction may be upward instead of downward, or may be in any other direction.

The contact body 1a is preferably made of brass or other suitable material to which charged powder paint does not easily adhere.

In the present invention constructed as described above, when the outer circumferential surface b of the object a to be coated conveyed into the powder coating part 2 comes into contact with the contact body 1a, the powder on the outer circumferential surface b adhered in the powder coating part 2 Paint peels off. During this time, the powder paint continues to adhere to the object a, so as the object a continues to pass through the powder paint adhesion section 2 after being removed, powder paint is newly attached to the outer peripheral surface b that was once removed. be done. As a result, the powder paint is thickly applied to the side surface c of the object a from which the powder paint has not been removed, and is applied thinly to the outer circumferential surface b from which the powder paint has been removed.

The conveying body A in the present invention may be any type as long as it can transport the object to be coated while rotating, but as an example, the conveying body A shown in FIGS. 5 and 6 may be used. Good.

What is shown in FIGS. 5 and 6 is two supports 3 that support the axis d of the object a covered with the cover e.
a, 3b, and two running bodies 4a, 4b that transport the shafts supported by both supports along the supports.
and two traveling body guides 5a and 5b that guide the respective traveling bodies.

The supports 3a, 3b and the traveling body guides 5a, 5b are formed in the shape of a long housing so as to accommodate the traveling bodies 4a, 4b.

A plurality of locking portions 6a, 6b are formed at appropriate intervals on the traveling bodies 4a, 4b, and are located at the front and rear of the shaft d, which is supported by the supports 3a, 3b and transported. The pair of locking portions 6a, 6b is configured such that the locking portion 6a at the rear of the shaft pushes the shaft d supported by the supports 3a, 3b from the rear in the transfer direction, thereby moving the shaft d between the locking portion 6b at the front. It is made to rotate on its own axis.

Support bodies 3a, 3b, traveling body guides 5a, 5b,
Of the traveling bodies 4a, 4b and the locking portions 6a, 6b, at least the traveling bodies 4a, 4b are made of plastic to prevent the charged powder paint from adhering to them.

The running bodies 4a and 4b are wound around a rotating ring (not shown) to form an endless shape, and are moved by the rotation of the rotating ring. Incidentally, an auxiliary body (not shown) is installed near the rotating wheels to prevent the object to be coated a transported by the traveling bodies 4a and 4b from falling when rotating along the rotating wheels.

Since the present invention is constructed as described above, it has the following various effects.

(1) Since the paint removal section 1 is provided midway inside the powder paint adhesion section 2, when the object a to be painted passes through the powder paint adhesion section 2, the powder paint is adhered to the object a. The paint adhering to the outer peripheral part b is automatically removed, and moreover, a new powder paint is automatically applied to the removed part. Therefore, simply by passing the object a to be coated through the powder coating application section 2, the powder coating can be thickly applied to the side surface c of the object a and thinly applied to the outer peripheral surface b of the object a.

(2) Since it is sufficient to simply pass the object a to be coated through the inside of the powder coating adhering section 2 as before, the coating work does not become troublesome.

(3) By appropriately selecting the overall length of the powder coating adhesion section 2 and the position of the paint removal section 1 provided midway inside, the thickness of the powder coating adhered to the side surface c of the object to be coated a can be adjusted. The thickness of the powder paint applied to the outer circumferential surface b can be freely selected.

(4) In particular, in this invention, new powder coating is applied after it has been removed, so if the amount of powder coating that is newly applied after removal is reduced, the thickness of the outer periphery can be reduced. It can also be made thinner, and moreover, it can be made thinner and have a more uniform thickness.

(5) Since the paint removal part 1 only needs to be provided within the powder paint adhesion part 2, the structure does not become particularly complicated and can be easily put into practical use.

(6) As stated in claim 2 of the utility model registration claim, two pairs of locking portions 6a, 6b located before and after the axis d are formed on the traveling bodies 4a, 4b, and the traveling bodies 4a, Since the shaft d is made to rotate by simply rotating the rotating wheel 4b, the structure of the apparatus for transporting the object to be coated a while rotating is extremely simple.

[Brief explanation of the drawing]

Figure 1 (A) is a side view of the object to be painted, (B) is a cross-sectional view of the object to be painted, (B) is a cross-sectional view of A, Figure 2 is a schematic explanatory diagram of a conventional coating device, and Figure 3 is a schematic explanatory diagram of a conventional paint removal section. , FIG. 4 is a schematic explanatory diagram of the paint removal section in the present invention,
5 is a schematic explanatory diagram of the carrier according to the present invention, FIG. 6A is a longitudinal sectional view of the carrier, B is a plan view of the carrier, and C is a side explanatory view of the carrier. 1 is the paint removal part, 1a is the contact body, 2 is the powder paint adhering part, a is the object to be painted, b is the outer peripheral surface, c is the side surface,
A is a carrier.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Transporting objects to be coated, such as motor rotors and motor stators, while rotating them on a transport body,
In an electrostatic coating device that passes the charged powder paint through the powder paint adhesion part and then melts and hardens the deposited powder paint by high-frequency heating, the object to be coated comes into contact with the powder paint part way inside the powder paint adhesion part. A paint removing body is provided to remove the powder paint adhered to the outer circumferential surface of the powder paint adhered to the object to be coated in the same adhesion section, and to remove the powder paint from the object to be coated in the same adhesion section even after removal. A rotor for a motor, characterized in that powder coating is applied to the outer peripheral surface of an object to be coated in a thinner layer than other parts.
Electrostatic coating equipment for stators, etc. (2) Utility Model Registration The conveyor described in claim 1 includes at least two supports that support a shaft with a mask attached to the object to be painted, a shaft with a mask attached to the object to be painted, and both supports. It is composed of two traveling bodies that transport the shaft supported by the body along the support body, and the traveling bodies have a plurality of two pairs of locking parts located at the front and back of the shaft to be transported at appropriate intervals. is,
The pair of locking parts are configured such that the locking part at the rear of the shaft pushes the shaft from the rear in the transport direction and rotates between it and the locking part at the front of the shaft. Electrostatic coating equipment for motor rotors, stators, etc. described above.