阅读说明：本技术 一种双面静电喷涂装置及方法 (Double-sided electrostatic spraying device and method ) 是由 吴学铮 李秦 王防讯 于 2021-09-18 设计创作，主要内容包括：本发明涉及一种双面静电喷涂装置及方法,包括喷涂室、工件传送组件、双面喷挂具、底喷组件和往复驱动组件；双面喷挂具设置为若干组且沿工件传送组件长度方向均匀分布,每组双面喷挂具吊装沿工件传送组件宽度方向并排分布的两个工件；所述工件传送组件通过双面喷挂具传送所述并排分布的两个工件至喷涂室内,往复驱动组件驱动底喷组件于两个工件之间上下往复喷涂,在高压静电电场作用下,经底喷组件沿周向方向喷出的带负电的涂料微粒吸附在两侧带正电的工件表面。本发明通过对烘道静电喷涂工序生产过程进行改造,将原来的侧面单面喷涂改造成底部双面喷涂,从而达到节能降耗、降本增效的效果。(The invention relates to a double-sided electrostatic spraying device and a method, comprising a spraying chamber, a workpiece conveying assembly, a double-sided spraying hanger, a bottom spraying assembly and a reciprocating driving assembly; the double-sided spraying hanging tools are arranged into a plurality of groups and are uniformly distributed along the length direction of the workpiece conveying assembly, and each group of double-sided spraying hanging tools hoist two workpieces which are distributed side by side along the width direction of the workpiece conveying assembly; the workpiece conveying assembly conveys the two workpieces which are distributed side by side to the spraying chamber through the double-sided spraying hanging tool, the reciprocating driving assembly drives the bottom spraying assembly to spray vertically and reciprocally between the two workpieces, and under the action of a high-voltage electrostatic electric field, coating particles with negative electricity sprayed out along the circumferential direction by the bottom spraying assembly are adsorbed on the surfaces of the workpieces with positive electricity on two sides. According to the invention, the production process of the drying tunnel electrostatic spraying process is improved, and the original side surface single-side spraying is improved into bottom double-side spraying, so that the effects of energy conservation, consumption reduction, cost reduction and efficiency improvement are achieved.)

1. A two-sided electrostatic spraying device which characterized in that: comprises a spraying chamber (1), a workpiece conveying component (2), a double-sided spraying hanger (3), a bottom spraying component (4) and a reciprocating driving component (5);

the double-sided spraying hanging tools (3) are arranged into a plurality of groups and are uniformly distributed along the length direction of the workpiece conveying assembly (2), and each group of double-sided spraying hanging tools (3) hoists two workpieces which are distributed side by side along the width direction of the workpiece conveying assembly (2);

the workpiece conveying assembly (2) conveys the two workpieces which are distributed side by side to the spraying chamber (1) through the double-sided spraying hanger (3), the reciprocating driving assembly (5) drives the bottom spraying assembly (4) to spray up and down between the two workpieces in a reciprocating mode, and under the action of a high-voltage electrostatic electric field, coating particles with negative electricity sprayed out along the circumferential direction through the bottom spraying assembly (4) are adsorbed on the surfaces of the workpieces with positive electricity on two sides.

2. A two-sided electrostatic painting apparatus according to claim 1, wherein: the workpiece conveying assembly (2) penetrates through the spraying chamber (1), is connected with an electrostatic high-voltage positive power supply and is grounded, so that workpieces on two sides are positively charged, the workpiece conveying assembly (2) comprises a guide rail (21), a hanging chain (22) arranged in the guide rail (21), a first hanging ring (23) uniformly arranged on the hanging chain (22), a chain wheel and a motor for driving the hanging chain (22) to rotate, and the double-sided spraying hanger (3) is movably connected with the first hanging ring (23).

3. A two-sided electrostatic painting apparatus according to claim 2, wherein: every two-sided hanger (3) that spout of group includes two double hook hangers that set up side by side on work piece conveying component (2) length direction, and every double hook hanger all sets up to falling Y shape, and its top is provided with couple (31) of being connected with link (23), and the bottom both ends are provided with couple (32) No. two that are used for hoisting the work piece.

4. A two-sided electrostatic painting apparatus according to claim 3, wherein: the double hook hanger comprises an upper connecting rod (33) and two lower connecting rods (34), the upper connecting rod (33) is arranged to be inverted T-shaped, the top end of the upper connecting rod is connected with a hook (31), two lower connecting rods (34) are fixedly arranged at two ends of the bottom of the upper connecting rod (33) and are perpendicularly arranged at two ends of the bottom of the upper connecting rod (33), the top end of the upper connecting rod is provided with a hook (36) movably connected with the two lower connecting rods (35), and the bottom end of the upper connecting rod is connected with the hook (32).

5. A two-sided electrostatic painting apparatus according to claim 2, wherein: the bottom spraying assembly (4) comprises a plurality of coating spray pipes (41) which are vertically distributed and arranged between two workpieces, an electrostatic spray head (42) connected to the top end of each coating spray pipe (41), and a coating atomizer connected with the coating spray pipes (41) through corrugated pipes (43), wherein the plurality of coating spray pipes (41) are distributed along the length direction of the workpiece conveying assembly (2), and the bottom ends of the coating spray pipes are connected with the reciprocating driving assembly (5).

6. The double-sided electrostatic spraying device of claim 5, wherein: the electrostatic sprayer (42) comprises a shell (421), a nozzle (422) and electrode needles (423), wherein the shell (421) is communicated with a coating spray pipe (41), the nozzle (422) is arranged to be a plurality of and is uniformly distributed along the circumferential surface of the shell (421), the electrode needles (423) are electrified to form a discharge area in the shell (421), and coating particles introduced through the coating spray pipe (41) carry negative charges through the discharge area and are sprayed out from the nozzle (422) and are in contact with the surfaces of workpieces with positive charges on two sides, so that double-sided spraying is realized.

7. The double-sided electrostatic spraying device of claim 5, wherein: reciprocating drive subassembly (5) include U type link (51), drive reciprocating elevator (52) that U type link (51) reciprocated, reciprocating elevator (52) are installed in spray booth (1), U type link (51) top one end is connected with reciprocating elevator (52), and the other end is connected with coating spray tube (41) bottom.

8. A double-sided electrostatic painting method of the double-sided electrostatic painting apparatus according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:

s1, hanging the workpieces two by two side on a plurality of groups of double-faced spraying hangers (3) arranged on the workpiece transmission assembly, and starting the workpiece transmission assembly (2) to circularly convey the workpieces;

s2, when the workpieces pass through the spraying chamber (1), the reciprocating driving component (5) drives the bottom spraying component (4) to spray vertically and reciprocally between the two workpieces, and under the action of the high-voltage electrostatic electric field, the negatively charged paint particles sprayed out along the circumferential direction through the bottom spraying component (4) are adsorbed on the surfaces of the workpieces with positive charges on the two sides.

Technical Field

The invention belongs to the field of spraying equipment, and particularly relates to a double-sided electrostatic spraying device and method.

Background

In the production process of products, workpieces are generally required to be painted and coated, surface spraying is an important processing procedure for improving the performance and the appearance attractiveness of the workpieces, the existing painting mode generally adopts electrostatic spraying, and the electrostatic spraying is a spraying method which utilizes a high-voltage electrostatic electric field to enable paint particles with negative electricity to directionally move along the opposite direction of the electric field and adsorb the paint particles on the surfaces of the workpieces.

However, in the electrostatic workpiece spraying process in the prior art, the workpiece is generally sprayed in a single-side spraying manner, the productivity of the spraying process is seriously lagged behind that of the welding process, and the powder consumption is large.

Disclosure of Invention

The present invention is directed to a double-sided electrostatic coating apparatus and method for solving the above problems.

The invention realizes the purpose through the following technical scheme:

a double-sided electrostatic spraying device and a method thereof comprise a spraying chamber, a workpiece conveying assembly, a double-sided spraying hanger, a bottom spraying assembly and a reciprocating driving assembly;

the double-sided spraying hanging tools are arranged into a plurality of groups and are uniformly distributed along the length direction of the workpiece conveying assembly, and each group of double-sided spraying hanging tools hoist two workpieces which are distributed side by side along the width direction of the workpiece conveying assembly;

the workpiece conveying assembly conveys the two workpieces which are distributed side by side to the spraying chamber through the double-sided spraying hanging tool, the reciprocating driving assembly drives the bottom spraying assembly to spray vertically and reciprocally between the two workpieces, and under the action of a high-voltage electrostatic electric field, coating particles with negative electricity sprayed out along the circumferential direction by the bottom spraying assembly are adsorbed on the surfaces of the workpieces with positive electricity on two sides.

As a further optimization scheme of the invention, the workpiece conveying assembly penetrates through the spraying chamber, is connected with an electrostatic high-voltage positive power supply and is grounded, so that workpieces on two sides are positively charged, the workpiece conveying assembly comprises a guide rail, a suspension chain arranged in the guide rail, first hanging rings uniformly arranged on the suspension chain, a chain wheel and a motor for driving the suspension chain to rotate, and the double-sided spraying hanger is movably connected with the first hanging rings.

As a further optimization scheme of the invention, each group of double-sided spraying hangers comprises two double-hook hangers arranged side by side in the length direction of the workpiece conveying assembly, each double-hook hanger is in an inverted Y shape, a first hook connected with a first hanging ring is arranged at the top end of the double-hook hanger, and a second hook used for hoisting workpieces is arranged at the two ends of the bottom of the double-hook hanger.

As a further optimization scheme of the invention, the double-hook hanger comprises an upper connecting rod and two lower connecting rods, wherein the upper connecting rod is arranged in an inverted T shape, the top end of the upper connecting rod is connected with a first hook, two hanging rings are fixedly arranged at two ends of the bottom of the upper connecting rod, the two lower connecting rods are vertically arranged at two ends of the bottom of the upper connecting rod, a third hook movably connected with the second hanging rings is arranged at the top end of the upper connecting rod, and the bottom end of the upper connecting rod is connected with the second hook.

As a further optimization scheme of the invention, the bottom spray assembly comprises a plurality of paint spray pipes which are arranged between two workpieces and are vertically distributed, an electrostatic spray head connected to the top end of each paint spray pipe, and a paint atomizer connected with the paint spray pipes through corrugated pipes, wherein the paint spray pipes are distributed along the length direction of the workpiece conveying assembly, and the bottom ends of the paint spray pipes are connected with the reciprocating driving assembly.

As a further optimization scheme of the invention, the electrostatic spray head comprises a shell, a plurality of nozzles and electrode needles, wherein the shell is communicated with the coating spray pipe, the nozzles are uniformly distributed along the circumferential surface of the shell, the electrode needles are electrified to form a discharge area in the shell, and coating particles introduced through the coating spray pipe carry negative charges through the discharge area and are sprayed out of the nozzles to contact with the surfaces of workpieces with positive charges on two sides, so that double-sided spraying is realized.

As a further optimization scheme of the invention, the reciprocating driving assembly comprises a U-shaped connecting frame and a reciprocating lifter for driving the U-shaped connecting frame to move up and down, the reciprocating lifter is arranged in the spraying chamber, one end of the top of the U-shaped connecting frame is connected with the reciprocating lifter, and the other end of the top of the U-shaped connecting frame is connected with the bottom end of the coating spraying pipe.

A double-sided electrostatic spray method, the method comprising:

s1, hanging the workpieces two by two side on a plurality of groups of double-sided spraying hangers arranged on the workpiece transmission assembly, starting the workpiece transmission assembly, and circularly conveying the workpieces;

and S2, when the workpieces pass through the spraying chamber, the reciprocating driving assembly drives the bottom spraying assembly to spray vertically and reciprocally between the two workpieces, and the negatively charged paint particles sprayed out along the circumferential direction by the bottom spraying assembly are adsorbed on the surfaces of the workpieces with positive charges on the two sides under the action of the high-voltage electrostatic field.

According to the invention, the double-sided spraying hanging tool is used for hanging two workpieces at a time, and the bottom spraying component which reciprocates up and down is used for spraying in a moving way when the workpieces pass through the spraying chamber, so that the side surfaces of the two workpieces are sprayed simultaneously, namely double-sided spraying, the spraying quality requirement can be met, and the powder consumption is reduced while the spraying efficiency of the workpieces is improved.

The invention has the beneficial effects that:

1) the invention changes the former motion side spraying into motion side spraying and motion bottom spraying to work simultaneously, thereby improving the efficiency and reducing the powder consumption; the dispersed flow forming distance of improving the front side spraying distance into the bottom spraying distance and the change of the shape of the electrostatic spray head are optimized to change the form of electric field lines, so that the distance between the electric field lines is more stable, and the electrostatic ignition phenomenon worried by the powder coating industry is also controlled;

2) the invention can strive for the maximum utilization rate of the drying tunnel, save energy and reduce consumption in limited space and limited temperature.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic structural diagram of the bottom spray assembly and the reciprocating driving assembly of the present invention.

FIG. 3 is a schematic cross-sectional view of the bottom-spraying assembly of the present invention.

Fig. 4 is a schematic view of the construction of the workpiece transport assembly of the present invention.

FIG. 5 is a front view of the double-sided spray hanger of the present invention.

FIG. 6 is a side view of the lower connecting rod of the present invention.

In the figure: 1. a spray chamber; 2. a workpiece transfer assembly; 21. a guide rail; 22. a suspension chain; 23. a first hanging ring; 3. a double-sided spraying hanging tool; 31. a first hook; 32. a second hook; 33. an upper connecting rod; 34. a lower connecting rod; 35. a second hanging ring; 36. a third hook; 4. a bottom spray assembly; 41. a coating spray pipe; 42. an electrostatic spray head; 421. a housing; 422. a nozzle; 423. an electrode needle; 5. a reciprocating drive assembly; 43. a bellows; 51. a U-shaped connecting frame; 52. a reciprocating lifter.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention; in the description of the present invention, the meaning of "plurality" or "a plurality" is two or more unless otherwise specified.

Example 1

As shown in fig. 1-6, a double-sided electrostatic spraying device and method comprises a spraying chamber 1, a workpiece conveying assembly 2, a double-sided spraying hanger 3, a bottom spraying assembly 4 and a reciprocating driving assembly 5;

the workpiece conveying assembly 2 penetrates through the spraying chamber 1, is connected with an electrostatic high-voltage positive power supply and is grounded, so that workpieces on two sides are positively charged, the workpiece conveying assembly 2 comprises a guide rail 21, a suspension chain 22 arranged in the guide rail 21, first hanging rings 23 uniformly arranged on the suspension chain 22, a chain wheel and a motor for driving the suspension chain 22 to rotate, and the double-sided spraying hanger 3 is movably connected with the first hanging rings 23;

the double-sided spraying hanging tools 3 are arranged into a plurality of groups and are uniformly distributed along the length direction of the workpiece conveying assembly 2, and each group of double-sided spraying hanging tools 3 are used for hoisting two workpieces which are distributed side by side along the width direction of the workpiece conveying assembly 2; each group of double-sided spraying hangers 3 comprises two double-hook hangers arranged side by side in the length direction of the workpiece conveying assembly 2, each double-hook hanger is in an inverted Y shape, a first hook 31 connected with a first hanging ring 23 is arranged at the top end of each double-hook hanger, and a second hook 32 used for hoisting a workpiece is arranged at the two ends of the bottom of each double-hook hanger; the double-hook hanger comprises an upper connecting rod 33 and two lower connecting rods 34, wherein the upper connecting rod 33 is arranged in an inverted T shape, the top end of the upper connecting rod 33 is connected with a first hook 31, two hanging rings 35 are fixedly arranged at two ends of the bottom of the upper connecting rod 33, the two lower connecting rods 34 are vertically arranged at two ends of the bottom of the upper connecting rod 33, a third hook 36 movably connected with the second hanging rings 35 is arranged at the top end of the upper connecting rod, and the bottom end of the upper connecting rod is connected with a second hook 32;

the workpiece conveying assembly 2 conveys the two workpieces which are distributed side by side into the spraying chamber 1 through the double-sided spraying hanger 3, the reciprocating driving assembly 5 drives the bottom spraying assembly 4 to spray up and down in a reciprocating manner between the two workpieces, and under the action of a high-voltage electrostatic electric field, coating particles with negative electricity sprayed out along the circumferential direction through the bottom spraying assembly 4 are adsorbed on the surfaces of the workpieces with positive electricity on two sides;

the bottom spraying assembly 4 comprises a plurality of paint spray pipes 41 which are arranged between two workpieces and are vertically distributed, an electrostatic spray head 42 connected to the top end of each paint spray pipe 41, and a paint atomizer connected with the paint spray pipes 41 through corrugated pipes 43, the paint atomizer is connected with a paint tank (not shown), the paint spray pipes 41 are distributed along the length direction of the workpiece conveying assembly 2, and the bottom ends of the paint spray pipes are connected with the reciprocating driving assembly 5;

the electrostatic sprayer 42 comprises a shell 421, a plurality of nozzles 422 and electrode needles 423, the shell 421 is communicated with the coating spray pipe 41, the nozzles 422 are uniformly distributed along the circumferential surface of the shell 421, the electrode needles 423 are electrified to form a discharge area in the shell 421, and coating particles introduced through the coating spray pipe 41 carry negative charges through the discharge area and are sprayed out from the nozzles 422 to contact with the surfaces of workpieces with positive charges on two sides, so that double-sided spraying is realized;

the reciprocating driving assembly 5 comprises a U-shaped connecting frame 51 and a reciprocating elevator 52 for driving the U-shaped connecting frame 51 to move up and down, the reciprocating elevator 52 is installed in the spraying chamber 1, one end of the top of the U-shaped connecting frame 51 is connected with the reciprocating elevator 52, and the other end of the top of the U-shaped connecting frame 51 is connected with the bottom end of the coating spraying pipe 41.

The implementation mode is that the double-sided electrostatic spraying device is applied to a spraying processing technology of a steel box, and a steel box side plate before assembly is sprayed;

each group of the double-sided spraying hangers 3 adopted by the double-sided electrostatic spraying device can be two double-hook hangers, the two double-hook hangers are movably connected with a first hanging ring 23 on the hanging chain 22 through a first hanging hook 31 at the top end side by side, the distance between the two double-hook hangers is kept to be the length of the steel box side plate, two groups of second hanging hooks 32 which are close to each other of the two double-hook hangers can respectively hook one steel box side plate and are specifically hooked in openings at the tops of the two sides of the steel box side plate, and therefore the two steel box side plates are hung on the two double-hook hangers side by side;

the workpiece conveying assembly 2 is started, the electrode driving chain wheel rotates, the chain wheel drives the suspension chain 22 to rotate, the suspension chain 22 can drive steel box side plates to circularly convey through a double-hook hanger, when the workpiece conveying assembly is conveyed into the spraying chamber 1, the bottom spraying assembly 4 is located between the two steel box side plates which are distributed side by side, the reciprocating hoister 52 is started, the reciprocating hoister drives the paint spraying pipe 41 and the electrostatic spraying head 42 to move up and down through the U-shaped connecting frame 51, paint particles atomized by the paint atomizer are conveyed into the electrostatic spraying head 42 through the paint spraying pipe 41, under the action of the electrode needle 423, the paint particles carry negative charges and are sprayed out from the plurality of nozzles 422 which are arranged on the peripheral surface, and therefore in the process that the two steel box side plates move slowly, the bottom spraying assembly 4 which moves up and down through the middle part carries out double-sided spraying.

In addition, the plurality of nozzles 422 arranged on the upper peripheral surface of the electrostatic sprayer 42 can uniformly spray coating particles to the peripheral surface, and directly act on the steel box side plate to ensure the uniform powder feeding rate of workpieces on two sides and avoid the difficulty in mutual adjustment of the distance between electrostatic powder and the sprayed workpiece, the air supply quantity and the running speeds of the reciprocating machine and the suspension chain 22 caused by upward dispersion of the spraying particles sprayed by the electrostatic sprayer 42.

Example 2

The double-sided electrostatic spraying method for the steel box side plate by using the double-sided electrostatic spraying device in the embodiment 1 comprises the following steps:

s1, hanging the steel box side plates two by two side on a plurality of groups of double-sided spraying hangers 3 arranged on the workpiece transmission assembly, starting the workpiece conveying assembly 2, and circularly conveying the steel box side plates;

s2, when the steel box side plate passes through the spraying chamber 1, the reciprocating driving assembly 5 drives the bottom spraying assembly 4 to spray vertically and reciprocally between the two workpieces, and paint particles with negative electricity sprayed out along the circumferential direction through the bottom spraying assembly 4 are adsorbed on the surfaces of the steel box side plates with positive electricity on the two sides under the action of a high-voltage electrostatic field, so that double-sided spraying of the opposite surfaces of the two steel box side plates is realized.

In order to solve the problems that the productivity of a spraying process is seriously lagged behind a welding process and the powder consumption is large in the steel box production process of a steel box workshop, a design scheme is innovated under the condition that the powder coating industry has no precedent, the principle of moving side spraying is changed into moving bottom spraying, and the design improves the effect and reduces the powder consumption; the distance between the front side spray and the bottom spray is changed into the distance between the bottom spray and the dispersed flow forming, and the electric field line form is changed by changing the nozzle 422 of the electrostatic spray head 42, so that the distance between the bottom spray and the dispersed flow forming is more stable, and the electrostatic ignition phenomenon worried by the powder coating industry is also controlled. In a limited space and at a limited temperature, the maximum utilization rate of the drying tunnel is obtained, and energy conservation and consumption reduction are realized.

The daily output of the electrostatic powder coating of the steel box after the transformation can be improved by 35 percent, the utilization rate of the drying tunnel is improved, the labor cost is reduced, and the powder consumption is reduced.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.