Fixed-point powder electrostatic spraying equipment

Abstract

The utility model relates to the technical field of electrostatic spraying, in particular to a fixed-point powder electrostatic spraying device which comprises a spraying room and a feeding mechanism, the two sides of the spraying room are provided with an inlet and an outlet for workpieces to go in and out, a spraying mechanism capable of reciprocating is arranged in the spraying room, the spraying mechanism comprises an obliquely-arranged spraying frame, and the feeding mechanism is arranged on the spraying frame. A plurality of nozzles are arranged on the spraying frame; and the feeding mechanism is used for feeding and discharging the workpieces into and out of the spraying room. The inclined spraying frame is arranged, so that the spraying area of the nozzle during up-down reciprocating motion is increased, and the spraying efficiency is improved compared with single-nozzle reciprocating spraying; and the advancing speed of the workpiece can be further improved according to the area of the workpiece, and the overall working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spraying, in particular to a fixed-point powder electrostatic spraying device. Background Art

[0002] Electrostatic spraying is a spraying method that uses the principle of corona discharge to make the corresponding powder coating generate negative charges, so that the powder coating particles are adsorbed on the surface of the workpiece with positive charges. During the use process, when the powder pump is always turned on, the material in the material barrel is continuously pumped out and sprayed onto the corresponding workpiece for continuous spraying work.

[0003] In the current continuous powder electrostatic spraying equipment, in order to make the spraying on the surface of the workpiece sufficient and uniform, in the prior art, multiple nozzles are usually used for spraying at the same time. For example, in the document with the publication number CN215997149U, multiple nozzles are arranged on both sides of the sprayed workpiece. However, multiple nozzles will increase the use rate of the coating and increase the difficulty of recovering the unused coating. In addition to multiple nozzles, the publication number CN212215940U realizes the same effect as multiple nozzles by adopting the method of reciprocating the nozzle. However, the reciprocating movement of a single nozzle requires restricting the traveling speed of the workpiece. If the traveling speed of the workpiece is too fast, the spraying on the surface of the workpiece will be uneven. However, if the traveling speed of the workpiece is too slow, the overall spraying efficiency will be affected. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model provides a fixed-point powder electrostatic spraying device, including:

[0005] A spraying chamber, openings for the workpiece to enter and exit are provided on both sides of the spraying chamber, and a reciprocating spraying mechanism is arranged in the spraying chamber. The spraying mechanism includes a spraying frame arranged obliquely, and a plurality of nozzles are arranged on the spraying frame;

[0006] A feeding mechanism, the feeding mechanism is a conveyor belt with hooks, and is used to send the workpiece into and out of the spraying chamber.

[0007] Further, the spraying mechanism further includes a paint tank and a driving mechanism. The paint tank is connected to the spraying frame through a hose to provide paint for a plurality of nozzles; the driving mechanism includes a first motor, a screw rod and a transmission block. The transmission block is sleeved on the screw rod. A slot for the transmission block to move is provided on one side of the spraying chamber where the spraying mechanism is arranged. The transmission block is connected to the spraying frame in the spraying chamber. The first motor rotates reciprocally to drive the screw rod to rotate, thereby driving the transmission block to move up and down to realize the reciprocating movement of the spraying frame.

[0008] Further, a second motor is further arranged in the transmission block. The rotating shaft of the second motor is connected to the spraying frame. Whenever the transmission block moves to the uppermost or lowermost position, the second motor rotates to drive the spraying frame to rotate and change the inclination angle.

[0009] Furthermore, a paint collecting tank is provided at the bottom of the spraying booth. The paint collecting tank is connected to the paint tank through a hose. A blower is provided in the paint collecting tank, and the blower sucks the excess paint at the bottom of the spraying booth into the paint tank.

[0010] In summary, the present utility model includes at least one of the following beneficial effects:

[0011] By providing an inclined spraying rack, the spraying area of the nozzle during the reciprocating movement up and down is increased, and the spraying efficiency is improved compared with the reciprocating spraying of a single nozzle. According to the area of the workpiece, the traveling speed of the workpiece can be further increased, improving the overall working efficiency.

[0012] On the basis of the above structure, the present utility model provides a second motor for the spraying rack that can rotate reciprocally. When the first motor drives the spraying rack to reach the uppermost or lowermost position, the second motor drives the spraying rack to rotate and flip the inclination angle, and then the first motor drives the spraying rack to return, thereby further increasing the spraying area of the spraying rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic diagram of the spraying rack in the spraying booth;

[0016] Figure 3 is a side cross-sectional view of the spraying booth;

[0017] Figure 4 is a comparison diagram of the spraying areas of the inclined and rotatable spraying rack and the horizontal spraying rack;

[0018] Spraying booth 1, spraying mechanism 2, spraying rack 3, nozzle 4, paint tank 5, driving mechanism 6, first motor 7, screw rod 8, transmission block 9, second motor 10, paint collecting tank 11, feeding mechanism 12, workpiece 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will further describe the present utility model in detail Figures 1-4 with reference to the accompanying drawings. Embodiment

[0020] This embodiment provides a fixed-point powder electrostatic spraying device, including a spraying chamber 1 and a feeding mechanism 12. Openings for workpieces to enter and exit are provided on both sides of the spraying chamber 1. The feeding mechanism 12 is used to send the workpiece 13 into the spraying chamber 1 for spraying and then send it out. In the prior art, the feeding mechanism 12 usually adopts a conveyor belt with a hook structure. The hook hangs the workpiece and enters from the entrances and exits on both sides of the spraying chamber 1 under the drive of the conveyor belt for spraying work.

[0021] Entrances and exits for workpieces to enter and exit are provided on both sides of the spraying chamber 1. A spraying mechanism 2 and a paint recovery mechanism are provided inside the spraying chamber 1. The spraying mechanism includes a paint tank 5 arranged outside the spraying chamber 1 and a driving mechanism 6. The driving mechanism 6 includes a first motor 7, a screw 8 and a transmission block 9. Among them, the first motor 7 and the screw 8 are arranged outside the spraying chamber 1. The transmission block 9 is movably arranged in a slot on the wall surface of the spraying chamber 1. The transmission block 9 is sleeved on the screw 8. The transmission block 9 has an internal thread that matches the thread of the screw 8. While the first motor 7 drives the screw to rotate, the transmission block 9 moves up and down under the drive of the screw.

[0022] One end of the transmission block 9 passes through a slot on the wall surface of the spraying chamber 1 and extends into the spraying chamber 1, and is connected to a spraying frame 3. A plurality of nozzles 4 are arranged on the spraying frame 3. The spraying frame 3 is connected to the paint tank 5 through a hose. The paint tank 5 sends the paint into the spraying frame 3 through a blower and further into each nozzle 4. The spraying frame 3 in this embodiment forms a certain angle with the horizontal line, so that the spraying area of the nozzle 4 can be increased when the spraying frame 3 moves back and forth.

[0023] A paint collection tank 11 is further provided at the bottom of the spraying chamber 1. The paint collection tank 11 is connected to the paint tank 5 through a hose. A blower is provided in the paint collection tank 11, and the blower sucks the excess paint at the bottom of the spraying chamber 1 into the paint tank 5. Embodiment

[0024] On the basis of the above embodiment, a second motor 10 is arranged in the transmission block 9, and the rotating shaft of the second motor 10 is connected to the spraying frame 3. Each time the first motor drives the spraying frame 3 to move to the highest or lowest point, the second motor 10 starts and rotates the spraying frame 3 to the opposite angle. The spraying frame 3 only flips to the opposite angle through the horizontal state (that is, the spraying frame 3 will not be vertical).

[0025] The technical solution of this embodiment obviously has a higher spraying efficiency compared with a single nozzle. Compared with multiple nozzles arranged longitudinally, fewer nozzles are used, saving the use of paint.

[0026] And this embodiment also has a better spraying area compared with a horizontal spraying frame, such as Figure 4As shown in the figure above, the spraying area of the horizontal spraying rack is presented. The upper and lower sides of an arbitrary quadrilateral are the movable edge positions of the spraying rack, and the hypotenuse is the movement trajectory on both sides of the spraying rack. To ensure the spraying effect of the workpiece, the maximum spraying area is the shaded part. When the height of the workpiece exceeds the height of the shaded part, there may be areas where spraying is missed; in this embodiment, the spraying rack is tilted, and after moving to the edge and flipping, the spraying area is as Figure 4 shown in the figure below. Without changing the traveling speed of the workpiece and the reciprocating speed of the spraying rack, that is, another set of hypotenuses remains unchanged (i.e., the spraying trajectory of the edge of the spraying rack is the same as that Figure 1 above), the height of the shaded part of the tilted and flipped spraying rack is higher. Therefore, a larger spraying area can be obtained in this embodiment, thus achieving a better spraying effect.

Claims

1. A fixed-point powder electrostatic spraying equipment, characterized in that: include A spraying room (1), wherein openings are provided on both sides of the spraying room (1) for workpieces to enter and exit, and a spraying mechanism (2) capable of reciprocating movement is provided in the spraying room (1), wherein the spraying mechanism (2) comprises an inclined spraying frame (3), and a plurality of nozzles (4) are provided on the spraying frame (3); A feeding mechanism (12) for feeding workpieces into and out of the spray booth (1); The spraying mechanism (2) further comprises a paint box (5) and a driving mechanism (6); the paint box (5) is connected to the spraying frame (3) via a hose to supply paint to the plurality of nozzles (4); the driving mechanism (6) comprises a first motor (7), a screw rod (8) and a transmission block (9); the transmission block (9) is sleeved on the screw rod (8); a slot for the transmission block (9) to move is provided on one side of the spraying room (1) where the spraying mechanism (2) is arranged; the transmission block (9) is connected to the spraying frame (3) in the spraying room (1); the first motor (7) reciprocates to drive the screw rod (8) to rotate, thereby driving the transmission block (9) to move up and down, thereby realizing the reciprocating motion of the spraying frame (3); A second motor (10) is also provided in the transmission block (9), and a rotating shaft of the second motor (10) is connected to the spray frame (3). Whenever the transmission block (9) moves to the uppermost or lowermost position of the driving screw (8), the second motor (10) rotates to drive the spray frame (3) to rotate and change the tilt angle.

2. A fixed-point powder electrostatic spraying equipment according to claim 1, characterized in that: A paint collecting trough (11) is also provided at the bottom of the spray booth (1), and the paint collecting trough (11) is connected to the paint box (5) via a hose. A fan is provided in the paint collecting trough (11), and the fan sucks excess paint at the bottom of the spray booth (1) into the paint box (5).

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