JPS58119366A - Electrostatic painting apparatus - Google Patents

Abstract

PURPOSE:To attain to enhance painting efficiency, by a method wherein a cylinder is coaxially arranged to the outer periphery of the leading part of a rotor and the knife edge part of the cylinder is forwardly protruded from the opening part of the emitting orifice of the rotor. CONSTITUTION:A disc like base body 11 is integrally provided to the rearward inner peripheral surface of a rotor 2 while a rotary shaft 8 is protruded from the center of the rear surface of the base body 11 and the rear end of the rotary shaft 8 is connected to the output shaft 9a of an air motor 9. To the inner peripheral surface of the leading end part of the rotor 2, a ring like protruded wall 14 is integrally formed and a paint emitting orifices 1...piercing the front and the rear surface thereof are provided to the protruded wall 14 by drilling. In addition, a cylinder 4 is provided to the outer periphery of the front part of the rotor 2 in an inlaid state and the inner peripheral surface of the leading part of the cylinder 4 is formed into a tapered shape of which the diameter is enlarged forwardly while the peripheral flange of the leading end of the cylinder 4 is sharpened to form a knife edge part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides paint discharge holes (1) arranged in multiple rows in an annular shape.
A rotary body (2) having ... on its tip surface is rotated at high speed, and a gold-made cylinder (4) having a
) is coaxially arranged on the outer periphery of the tip of the rotating body (2), and the knife part (3) of the cylinder body (4) is connected to the paint discharge hole +11.
The opening (6) projects forward within a range of 920 m or less, and a jet nozzle (6) is provided at the rear of the outer periphery of the knife part (3) to direct the end flow of the atomized paint toward the object to be painted (7). An electrostatic Ik bale characterized by forming a jet stream of an annular cylindrical body that envelops the cylindrical body and applying a high voltage between the cylindrical body (4) and the object to be coated (7). Regarding the coating, the purpose is to make the atomized particles finer than before when atomizing the supplied liquid paint, to obtain a good painted surface, and to improve the efficiency of the wrinkle work. To provide a coating scissors device capable of improving coating efficiency, obtaining a uniform painted surface, and improving coating efficiency.

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

(21Fi is a rotating body made of cylindrical gold maple, and a disc-shaped base (11) is integrally provided on the inner peripheral surface slightly toward the rear, and the inside of the rotating body (2) is Toshinel S is divided into a chamber and a Vt chamber and is provided on the base (11).
aW... of the rotating body (2)! The inner circumferential surface of the rI portion and the rear inner circumferential surface are continuous, and the inner circumferential surface of the rotating body (2) is formed into a round shape with a diameter increasing toward the front. Substrate (il
A rotation axis (button) is derived from the center of the rear surface of l, and the rotation axis (
8) The rear end is connected to the output shaft (91) of the output shaft (9) by air. The rotating shaft (8) is formed into a hollow vial shape with a via hole (10), and high pressure air is introduced into the via hole (10) at the bearing portion. At the tip of the one-way rotating shaft (8), a through hole 01 is drilled radially in the base body (Ill), and the other end of the body through hole I is in the rotating body (2). It opens on the outer circumferential surface of the rotating body (2).An annular projecting wall I is integrally formed on the inner circumferential surface of the tip of the rotating body (2).
Then, paint discharge holes (・1・)...- are bored through the #1 surface and rear surface of the core projecting wall I, and the paint discharge holes +1
+... A large number of rows are arranged at equal intervals so as to form an annular shape, and the paint discharge holes +1) are open at the tip surface of the rotating body (2), and the inner 8 surfaces of the rotating body (2) sVC It's open. (4) is a cylindrical body installed on the front outer periphery of the rotary body (2), and is formed of a metal ring like the rotary body (2), and the inner peripheral surface of the tip of the cylindrical body (4) is The diameter of the cylindrical body (4) is expanded toward the tip to form a nine-tapered shape, and the peripheral edge of the distal end of the cylindrical body (4) is sharpened to form a knife portion (3). Therefore, when the cylinder (4) is closely fitted to the front outer periphery of the rotary body (2), the 96 part (3) of the cylinder (4) discharges the paint on the tip surface of the rotary body (2). The centrifugal force of the rotating body (2) that causes the liquid paint to be continuously discharged from the degraded material discharge hole fil and rotates at a barrel speed so as to project forward from the opening (6) of the hole il+ within a range of 20 W or less. This is to ensure that the blown-off liquid paint collides with the inner circumferential surface of the cylinder (4) on the elliptical side of the knife section (3). (1611j) A second cylindrical body whose tip part extends around the outer periphery of the rotating body (2), and which is attached to the inner peripheral surface of the rear end of the second cylindrical body (I5). The inner curve of the protruding ridge 061 is brought into close contact with the outer circumferential surface of the rotating body (2) rearward from the through-hole viewing opening, and the outer circumferential surface of the rotating body (2), the outer circumferential surface of the cylindrical body (4), and the second cylinder are brought into close contact. The air chamber (I7) formed between the inner circumference l of the body (I5)
1, high pressure air is introduced from the buying hole G field. The inner circumferential surface of the tip of the second t#tJ body 96) is arranged with a gap from the outer circumferential surface of the cylinder body (4) slightly behind the knife part (3), and the gap is used as a jet nozzle (6). An annular jet stream is formed around the outer periphery of the knife portion (3). 08) The liquid paint is continuously supplied to the inner peripheral surface of the rear part of the rotary body from the tip of the H & paint supply by,
The paint supply tool (18) is supported by a support (21) at the tip of the edge arm P, and its end is connected to a paint supply source, and the other end of the paint supply tool is connected to the paint supply source. It is connected to the rear end of the bird. (With the 241Fi air supply source, supply high-pressure air through the air tube (2) trace and the bearing section □□□. If the air is used to drive the shaft (9) in rotation, then , high-pressure air is fed into the air chamber from the bearing part (A) through the through-hole (lO) of the rotating shaft (8) and the through-hole α of the base body (11), and from the jet nozzle tel to the knife part. (3) Form an annular cylindrical jet stream of high-pressure air on the outer periphery. □□□#'i The high-pressure generation source is connected to the terminal (c) provided on the bearing part via the electric wire method, and the air is uniformly (9), rotating shaft (8), base (■), rotary body (2)
A high voltage is applied to the knife portion (3) of the cylindrical body (4) through the cylindrical body (4). Also, the object to be painted (7) is kept at ground potential.

Thus, in the above embodiment, the liquid paint flowing down from the tip of the paint supply pipe onto the rear inner circumferential surface of the rotating body (2) is uniformized in the circumferential direction as the rotating body (2) rotates, and Due to the centrifugal force of the rotating body (2), which is rotating at high speed, the liquid paint moves forward along the taper on the inner circumferential surface of the rotating body (2), passes through the toshinel part (121), and is attached to the rotating body. (2)
The liquid paint that has reached the first button on the inner circumference of the curve moves roughly forward,
Finally, it reaches the 'f& face part of the projecting wall part.

After this rear projecting wall - [lt' 1 part of the liquid paint Vi gradually penetrates into the paint discharge hole 1+ and passes through the interior of the liquid paint Vii material discharge hole (1) (6) The droplet-like or thread-like liquid paint is suddenly blown outward by the action of centrifugal force from the opening 161, and the droplet-like or thread-like liquid paint is blown away from the inner periphery (3) of the knife part (3) of the cylinder (4). The liquid paint that collides with the liquid paint, which becomes a large thin film due to the impact force at the time of collision, is immediately electrostatically atomized into an extremely fine atomization in the knife part (3), and the liquid paint is electrostatically atomized into a very fine atomization. Part (3) The action of the jet air flowing around the outer periphery synergistically atomizes and promotes atomization, and the atomized paint particles are given an initial velocity by the action of the jet air and become static. Due to the action of the electric field, the object to be coated flies towards the object to be coated (), and at the same time, the object to be coated is sprayed out from the jet nozzle (8) which is rotating together with the rotating body (2) and flows in a spiral shape. The trailing stream of the atomized paint flying in the ()) direction is surrounded, preventing the atomized paint from scattering in unnecessary directions, and the trailing stream of the atomized paint flying in the XF- The atomized paint is well dispersed in the curve, and a uniform pattern is formed.

In the present invention, the opening (6) of the paint discharge hole Tl)
) of the knife part (31) of the cylinder (4) by 20 m.
The inner diameter of the cylindrical body (4) coaxially disposed on the outer periphery of the Vi co-rotator (2), especially the inner diameter of its knife portion (3) The amount of forward protrusion can be determined in relation to the above, and if the cylindrical body (4) is present very close to the opening (6) (for example, within a few degrees), the knife portion ( The amount of forward protrusion of 3) must be set to 10 wJ or less, and even if the cylinder (4) is quite far away from the opening (6) (for example, several turns), the amount of forward protrusion of the knife part (3) must be set at a maximum of 20 or more. If it protrudes, good atomization as aimed at in the present invention cannot be obtained. That is, in the present invention, most of the liquid paint that is blown away in the radial direction from the opening (6) by the action of centrifugal force collides with the inner circumferential surface of the cylinder (4) near the knife part (3). The liquid paint is thinned by the impact force, and this thinned liquid paint is supplied to the knife part (3).
), which is electrostatically atomized by the action of the centrifugal force, which reduces the impact force when the liquid paint collides with the inner peripheral surface of the cylinder (4) near the knife part (3). When atomization is performed synergistically by electrostatic action and jet stream action in the knife part (3), the particles of the atomized liquid paint are However, in the above embodiment, the opening m ) If the distance from the center to the inner circumference [k]'' of the cylinder (4) is 5 degrees, the best results will be obtained if the 11-way protrusion of the knife part (3) is approximately 5 u. If the size of the complexed particles is larger or smaller than this, the complexed particles tend to increase in size.In the present invention, when the forward protrusion of the knife part (3) becomes 0 or smaller, the effect of only the jet stream increases. Since the atomization and flight direction of the atomized paint are regulated, there is a problem that good electrostatic coating cannot be obtained.
If it exceeds w, no matter how large the diameter of the cylinder (4) is used, it will not be possible to obtain the fine complexed particles that are the object of the present invention.

As mentioned above, the cylindrical body is coaxially arranged on the outer periphery of the tip of the rotary body, and the knife part of the cylinder is made to protrude in the dfr direction within a range of 20 u or less from the opening of the rotary body paint discharge hole. Therefore, the paint is discharged from the opening of the paint discharge hole (b).
The liquid paint thrown outward from the paper by the action of the centrifugal force acting on the rolling body collides with the circumference of the cylinder, and the impact force at the time of this collision produces a good thin film of the liquid paint. Moreover, as mentioned above, the liquid paint thrown out from the opening of the mixing discharge hole collides with the periphery of the cylinder, and the impact force at the time of this collision produces a good thin film of the liquid paint, making it efficient. It is possible to form a large liquid paint into a good thin film, and especially when a large diameter one is used as an integrated cylinder, it can be made into a thin film even when a large liquid paint is continuously supplied from a relatively small rotating body. It can be made into a thin film and obtain fine atomized particles, and since the liquid paint is made into a thin film by the impact force at the time of impact, the thickness of the thinned liquid paint can be effectively reduced. This has the effect that finer paint particles can be obtained during conversion in the knife section. A jet nozzle is provided on the outer periphery of the door to form a ring-shaped jet stream that envelops the tail stream of atomized paint toward the object to be coated. The liquid paint is synergistically atomized by the action of the jet stream flowing around the outer periphery, improving the atomization efficiency, making it possible to atomize a large amount of liquid paint, and reducing the fineness of the atomized paint particles. This has the effect of promoting atomization, and the cylindrical jet stream surrounds the tail stream of the atomized paint flying toward the object to be coated, which prevents the atomized paint from scattering in unnecessary directions. This has the effect of preventing drooping and improving the dispersion of the atomized paint on a plane perpendicular to the flying direction in the tail stream of the atomized paint, forming a uniform coating pattern. Because the end stream of the atomized paint is surrounded, the direction of travel of the end stream is fixed, and even when painting is performed by swinging the rotating body or moving parallel to the object to be coated vertically or horizontally, The above-mentioned end stream is not disturbed, and it has the effect of being able to coat a wide area with a small installation.7.

[Brief explanation of the drawings] Figure 1 is a front view of the zero-starting example, 4! ! ; Figure 2 is an X-XllllTdo diagram of the same as above, Figure 8 is a schematic diagram of the same as the above in use, Figure 4 is an enlarged sectional view of the paint discharge hole and the if edge part of the same as the above, fi+ is the paint discharge hole, ( 2) is a rotating body, 13j ij knife part, f41ilt cylinder body, ill Vi-mouth part, +61ij jet nozzle, (
7) ＃″i is the object to be painted. Agent Patent Attorney Ishi 1) Long Seven

Claims (1)

[Claims] (1) Connect the paint discharge holes arranged in multiple rows in an annular shape to the tip ff1.
A rotary body having K is rotated at high speed, and a metal cylinder having an eye-shaped portion at its tip is coaxially disposed around the outer periphery of the tip of the rotary body, and the knife portion of the wrinkled cylinder is connected to the opening of the paint discharge hole. A jet nozzle is provided at the rear of the outer periphery of the scissor knife part to create an annular jet air stream to wrap around the blockage of the tinned paint toward the object to be coated. A seiden coating* apparatus characterized in that the cylindrical body is formed and a high voltage is applied between the cylindrical body and the object to be coated.