CN114950899A

CN114950899A - Powder spraying system

Info

Publication number: CN114950899A
Application number: CN202210764795.8A
Authority: CN
Inventors: 黄烨; 朱智能; 彭必占; 任泽兵; 戴文海; 高险峰; 吴旭升; 俞刚强
Original assignee: Wuhan Dongyan Intelligent Design And Research Institute Co ltd
Current assignee: Wuhan Dongyan Intelligent Design And Research Institute Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-08-30
Anticipated expiration: 2042-06-29
Also published as: CN114950899B

Abstract

The invention discloses a powder spraying system, in particular to a powder spraying system suitable for a powder spraying process of a long-strip-shaped or plate-shaped workpiece, which is particularly suitable for the technical field of vehicle frame longitudinal beam coating and mainly comprises a first powder spraying device, a conveying device, a second powder spraying device, a recovery device, a powder blowing mechanism, a moving device and a chamber body; the powder spraying system provided by the invention has the advantages that the first powder spraying device, the conveying device, the second powder spraying device and the recovery device are sequentially arranged from top to bottom, so that the technical effect of simultaneously performing powder spraying operation on the upper surface and the lower surface of a workpiece is realized, meanwhile, redundant powder is recovered through the recovery device, and residual powder on the conveying device can be removed during the gap period of the powder re-spraying operation through the powder blowing mechanism.

Description

Powder spraying system

Technical Field

The invention belongs to the technical field of spraying equipment, and particularly relates to a powder spraying system suitable for a powder spraying process of a strip-shaped or plate-shaped workpiece, in particular to the technical field of vehicle frame longitudinal beam coating.

Background

The commercial vehicle frame is formed by assembling longitudinal beams and cross beams, is a main body bearing part of a vehicle chassis and bears most of the self weight of the vehicle and the weight of cargos. The longitudinal beam is used as a main component of the frame, and if the surface coating quality is unqualified, adverse changes such as corrosion, oxidation and the like are easy to occur in a severe outdoor environment, so that the bearing strength of the longitudinal beam is reduced, even the longitudinal beam is broken, and serious safety accidents are caused, and the surface coating performance of the longitudinal beam is higher by various commercial vehicle manufacturers at home and abroad; the cross section of the longitudinal beam is generally in a groove shape, the upper surface, the lower surface and the side wings of the longitudinal beam are often required to be separately sprayed when the existing powder spraying equipment is used for spraying the powder on the longitudinal beam, the automatic spraying work and the simultaneous spraying of multiple workpieces are difficult to realize, the working efficiency is low, the coating quality is unqualified due to uneven powder thickness when the powder is sprayed for multiple times, the occupied area is large, the construction and maintenance costs are high, and the cleaning of redundant powder is difficult; occupational disease hazards are easily generated in the manual powder spraying process, and the labor cost and the occupational disease prevention cost are increased; how to realize simple, efficient and high-quality longitudinal beam powder spraying is a problem to be solved by various manufacturers.

Disclosure of Invention

The invention provides a powder spraying and recycling system, and solves the problems that in the prior art, automatic spraying of long workpieces such as automobile longitudinal beams is difficult to realize, labor cost is high, occupational diseases and hazards are large, occupied area is large, construction and maintenance costs are high, excessive powder is difficult to clean and the like.

The technical scheme adopted by the invention is as follows: a powder spraying system comprises a first powder spraying device, a second powder spraying device, a conveying device and a chamber body; the conveying device comprises a carrying unit, the carrying unit penetrates through two parallel side faces of the chamber body and is used for conveying workpieces along a first direction, the first powder spraying device and the second powder spraying device are arranged in the chamber body, the first powder spraying device can move along the vertical or horizontal direction and is used for spraying powder on the upper surface of the workpieces from top to bottom, the second powder spraying device is used for spraying powder on the lower surface of the workpieces from bottom to top, and the first powder spraying device and the second powder spraying device are arranged in a staggered mode in the first direction.

Further, the carrying unit comprises a plurality of rollers arranged in parallel, a plurality of disc-shaped members for supporting and conveying the workpiece are arranged on each roller at intervals, and the disc-shaped members are coaxial with the rollers.

Further, the first powder spraying device and the second powder spraying device are sequentially arranged along the first direction, and the second powder spraying device is located on the output side of the chamber body.

Further, the first powder spraying device and the second powder spraying device are sequentially arranged along the first direction, a gap between two rollers which are positioned at the foremost end in the first direction in the chamber is a first gap, and the second powder spraying device is arranged in the first gap.

Further, the disk-like members include a first disk-like member provided on each of the rollers located on the rear side in the first direction from the second powder spraying means, and a second disk-like member provided on each of the rollers located on the front side in the first direction from the second powder spraying means;

the second disc-shaped component comprises a second sleeve fixedly connected to the roller and teeth evenly distributed on the side surface of the second sleeve in the circumferential direction, and the height of the side surface of the disc-shaped component relative to the roller is larger than the height of the side wing of the workpiece.

Further, the first disk-shaped member comprises a first sleeve fixedly connected to the drum and disks arranged on both sides of the first sleeve, and the diameter of each disk is larger than that of the drum.

Furthermore, the second disc-shaped member comprises a second sleeve fixedly connected to the roller and a plurality of ejector pins circumferentially distributed on the side surface of the second sleeve at intervals, one end of each ejector pin is fixedly connected to the second sleeve, the other end of each ejector pin is a conical top, and the conical tops are used for supporting the workpiece.

Furthermore, the second powder spraying device comprises a plurality of second powder spraying gun groups, each second powder spraying gun group comprises three second spray guns sequentially arranged along a second direction, the second direction is horizontal and perpendicular to the first direction, the second spray gun positioned in the middle of the second spray gun group is aligned to the lower surface of the workpiece, and the second spray guns positioned on two sides of the second spray gun group are arranged relative to the side wings of the workpiece.

Further, powder blowing mechanisms are arranged below the first disc-shaped members in the chamber body and used for removing powder on the surfaces of the first disc-shaped members in the chamber body.

Furthermore, the powder spraying system also comprises a recovery device which is arranged on a bottom plate in the chamber body and is used for recovering the redundant powder.

Furthermore, the powder spraying system further comprises a moving device, the moving device is fixedly connected with the first powder spraying device, and the moving device is used for controlling the first powder spraying device to move.

Further, the powder spraying system further comprises a chamber body with the hollow inside, the chamber body is arranged in the chamber body, and the carrying unit penetrates through two parallel side faces of the chamber body.

One or more technical schemes provided by the invention at least have the following technical effects or advantages:

1. the carrying unit penetrates through two parallel side faces of the chamber body and is used for sending workpieces into the chamber body along a first direction and then sending the workpieces out of the chamber body along the first direction, so that when powder spraying processing is carried out on workpieces with large sizes (such as long strip-shaped workpieces with the lengths larger than the distance between the front side and the rear side of the chamber body), the whole powder spraying operation of the workpieces can be completed in the chamber body through the first powder spraying device and the second powder spraying device only by conveying the workpieces through the carrying unit and passing through the lower part of the first powder spraying device, the whole workpieces are not required to be completely positioned in the chamber body, and the factory area occupied by the powder spraying recovery system is further saved.

2. Through setting up the room body for the regional comparatively sealed of dusting, and need not to carry out artifical dusting, mend powder work, and then reduce the contact of personnel and dust, effectively reduce occupational disease harm.

3. The multiple rollers which are identical in structure and arranged in parallel are used as the carrying unit, so that a gap is formed on the carrying surface of the carrying unit, conditions are provided for carrying out powder spraying operation on the upper surface and the lower surface of the workpiece at the same time, and the technical effect of carrying out powder spraying on the upper surface and the lower surface of the workpiece at the same time is realized through the second powder spraying device which is arranged in the chamber body and arranged below the rollers, so that the operation efficiency is improved, meanwhile, the contact between the powder sprayed parts and the carrying unit, which is caused by respectively carrying out powder spraying on the upper surface and the lower surface of the workpiece, is reduced, and the powder spraying quality is improved.

4. The first powder spraying device and the second powder spraying device are sequentially arranged in the first direction, so that powder spraying areas of the first powder spraying device and the second powder spraying device are not overlapped, the mutual disturbance of powder sprayed by the first powder spraying device and the second powder spraying device in powder spraying operation is reduced, the second powder spraying device is positioned on the output side of the chamber body, the second powder spraying device is arranged at the rear end in the first direction, the number of rollers (or disc-shaped members on the rollers) which need to be contacted after the lower surface of the workpiece is sprayed can be reduced, the damage to the lower end spraying surface of the workpiece caused by conveying the workpiece is reduced, and the powder spraying quality is improved.

5. The disc-shaped members are arranged respectively, so that the area of a conveying surface of the carrying unit, which is in contact with the lower surface of the workpiece, can be further reduced, the spraying quality defect caused by the fact that powder remained on the conveying surface of the carrying unit is attached to the lower surface of the workpiece is also reduced, and the powder spraying quality is improved.

6. Through setting up the second disc component, make the second disc component include fixed connection sleeve on the cylinder and circumference evenly distributed the thimble on the telescopic side surface, through in the transportation process of work piece, only make the conical top of thimble with the lower surface contact of work piece, make the lower surface spraying of work piece accomplish the back with the area of contact of delivery unit further reduces, reduces because of carrying the damage of work piece cause to the work piece lower extreme spraying face, avoid producing coating surface orange peel, pit and inhomogeneous phenomenon, further improvement is sprayed powder the quality.

7. The second spray gun positioned in the middle of the second spray gun group is aligned to the lower surface of the workpiece, so that the second spray gun positioned in the middle is mainly responsible for spraying the lower surface of the workpiece; the second spray guns on two sides in the second spray gun group are arranged relative to the side wings of the workpiece, so that the second spray guns on two sides can spray the side surfaces of the workpiece.

8. By arranging the recovery device, redundant powder in spraying operation is recovered and reused, the utilization rate of the powder is improved, dust pollution is reduced, less waste is generated, the requirement on end treatment is low, and the environment friendliness is good.

9. Through setting up blow whitewashed mechanism has realized the indoor just to the automatic clearance of remaining powder on the delivery unit avoids because of remaining powder on the delivery unit is infected with the surface of work piece, and then influences the spraying quality, simultaneously, has realized the automatic clearance to remaining powder, has improved the powder utilization ratio, has still reduced the process that personnel cleared up remaining powder, and then reduces the contact of personnel and dust, reduces occupational disease harm.

10. Through setting up the telecontrol equipment, control first powder spray device reciprocates, with level and perpendicular to the first direction reciprocating motion, realized first powder spray device with the relative position of work piece can be regulated and control, and realized during the spraying operation first powder spray device can follow the level and perpendicular to the function of first direction reciprocating motion, make during the spraying operation, first powder spray device's spraying is more even.

11. Through setting up the room body, further improve powder spraying system's leakproofness reduces dust pollution and occupational disease harm that unnecessary powder caused.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic front view of a powder spraying system provided in this embodiment;

fig. 2 is a schematic diagram of a right-view structure of the powder spraying system provided in this embodiment;

fig. 3 is a schematic front view of the first powder spraying device, the second powder spraying device, the moving device and the chamber in the powder spraying system provided in this embodiment;

fig. 4 is a schematic right-view structural diagram of the first powder spraying device, the second powder spraying device, the moving device, the recycling device and the chamber in the powder spraying system provided in this embodiment;

fig. 5 is a schematic front view of a conveying device in the powder spraying system provided in this embodiment;

fig. 6 is a schematic top view of a conveying device in the powder spraying system provided in this embodiment;

FIG. 7 is a schematic diagram illustrating a positional relationship between a first disk member and a powder blowing mechanism in the powder coating system according to the present embodiment;

FIG. 8 is a schematic front view of a second disk member of the powder spray coating system provided in the present embodiment;

fig. 9 is a schematic side view of a second disc-shaped member in the powder spray coating system according to the embodiment.

Wherein: 1-conveying device, 2-first powder spraying device, 3-chamber body, 4-second powder spraying device, 5-recovery device, 6-powder blowing mechanism, 7-movement device, 8-chamber body and 9-workpiece;

101-carrier unit, 102-drive unit;

10101-a drum, 10102-a first disc member, 10103-a second disc member;

10201-driving motor, 10202-transmission assembly, 10203-driven assembly, 10204-first bracket, 10205-second bracket;

201-a first lance; (ii) a

301-input window, 302-output window;

401 — a second spray gun;

601-air pipe, 602-air nozzle;

701-reciprocating unit, 702-lifting unit, 703-connecting part;

70101 bottom plate, 70102 moving part.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

As shown in fig. 1 and fig. 2, the present embodiment provides a powder spraying system, which includes a conveying device 1, a first powder spraying device 2, a chamber body 3, a second powder spraying device 4, a recycling device 5, a powder blowing mechanism 6, a moving device 7 and a chamber body 8;

the first powder spraying device 2, the second powder spraying device 4 and the recovery device 5 are all arranged in the chamber body 3, and the chamber body 3 is arranged in the room body 8;

the first powder spraying device 2, the conveying device 1, the second powder spraying device 4 and the recovery device 5 are sequentially arranged from top to bottom;

as shown in fig. 1 and fig. 2, the conveying device 1 includes a carrying unit 101 and a driving unit 102, an input window 301 and an output window 302 are respectively disposed on two parallel side surfaces of the chamber body 3, the carrying unit 101 is disposed horizontally and vertically penetrates through the input window 301 and the output window 302, and the carrying unit 1 is configured to send a workpiece 9 into the chamber body 3 through the input window 301 on the chamber body 3 along a first direction, and send the workpiece 9 out of the chamber body 3 through the output window 302 on the chamber body 3 along the first direction; that is, in the present embodiment, the first direction is a direction horizontal and perpendicular to the input window 301 and the output window 302, and the first direction is directed from one side of the input window 301 to one side of the output window 302 (i.e., the first direction is a direction from right to left in fig. 2).

The room body 3 sets up in the room body 8, conveyor 1 passes the side of two parallels of the room body 8 is through setting up the room body, further improves powder paint finishing's leakproofness reduces dust pollution and occupational disease harm that unnecessary powder caused.

In this embodiment, the carrying unit 101 vertically passes through two parallel side surfaces (not shown in the figure) of the housing 8, and feeds the workpiece 9 into the housing 8 through a feeding hole (not shown in the figure) on the housing 8 along a first direction, and then feeds the workpiece 9 out of the housing 8 through a discharging hole (not shown in the figure) on the housing 8 along the first direction.

The function of the moving device 7 can be implemented by using various liftable spraying reciprocating machines, and according to the difference of the selected spraying reciprocating machines, the installation position of the moving device 7 includes but is not limited to: arranged outside the chamber body 8 and mounted on top of the chamber body, arranged between the chamber body 3 and the chamber body 8, or arranged inside the chamber body 3 and mounted on the ceiling of the chamber body 3, in the present embodiment, as shown in fig. 1, 2, 3 and 4, the moving means 7 includes a reciprocating unit 701, a lifting unit 702 and a connecting portion 703, the reciprocating unit 701 comprises a bottom plate 70101 and a moving part 70102, the bottom plate 70101 is fixedly connected to the top surface of the outer side of the house body 8, the moving part 70102 is movably connected to the bottom plate 70101, so that the moving part 70102 can reciprocate on the bottom plate 70101 along a second direction, the second direction is horizontal and vertical to the first direction, and the lifting unit 702 is movably connected to the moving part 70102, so that the lifting unit 702 can move up and down on the moving part 70102 along the direction vertical to the horizontal plane;

as shown in fig. 3 and 4, the first powder spraying device 2 includes a plurality of first powder spraying gun groups, the first powder spraying gun groups include a plurality of first powder spraying guns 201, the connecting portion 703 penetrates into the chamber body 3 through a first moving groove provided at the top end of the chamber body 8 and a second moving groove provided at the top end of the chamber body 3 and is fixedly connected with each of the first powder spraying guns, the connecting portion 703 is fixedly connected with the lifting unit 702, and by a control command, the first powder spraying guns 201 can reciprocate at a required speed in the second direction and a direction perpendicular to the horizontal plane, and the adjustment of the height position of the first powder spraying guns 201 relative to the workpiece 9 can also be realized;

the size and shape of the moving groove are set so as to satisfy the requirement that all the first spray guns 201 can move back and forth in the second direction and the direction vertical to the horizontal plane according to the designed travel range.

As shown in fig. 5 and 6, the carrying unit 101 includes a plurality of rollers 10101 with the same structure and arranged in parallel, in this embodiment, the number of the rollers 10101 included in the carrying unit 101 is more than 5 rollers 10101 shown in fig. 1-4 (e.g., the rollers 10101 arranged outside the house 8 due to the conveying device 1 penetrating out of two parallel sides of the house 8).

The driving unit 102 includes a driving motor 10201, a transmission assembly 10202, a driven assembly 10203, a first bracket 10204, and a second bracket 10205; the first bracket 10204 and the second bracket 10205 are respectively disposed at both sides of the chamber body 3; the driving motor 10201 is mounted on the first bracket 10204, the transmission assembly 10202 is connected with the driving motor 10201, and the driven assembly 10203 is fixedly mounted on the second bracket 10205; one end of each roller 10101 is connected with the first bracket 10204 through the transmission assembly 10202, the other end of each roller 10101 is connected with the second bracket 10205 through the driven assembly 10203, the roller 10101 is driven to rotate in a plane perpendicular to the axis thereof through the transmission assembly 10202 by the rotation of the driving motor 10201, so as to convey workpieces along the first direction, in this embodiment, the transmission assembly 10202 comprises a gear fixedly connected to one end of each roller 10101, and a chain engaged between the gear and the output end of the driving motor; the driven assembly 10203 is a bearing with an inner hole rotatably connected to the other end of each roller 10101, and the bearing is fixedly connected to the second bracket 10205.

A plurality of disc-shaped members for supporting and conveying the workpiece are arranged on each of the rollers 10101 at intervals, and the disc-shaped members are coaxial with the rollers 10101, such as but not limited to, in this embodiment, each of the rollers 10101 is fixedly connected with 6 disc-shaped members according to a designed interval, the disc-shaped members are coaxial with the drum 10101, all the disc-shaped members provided on the drum 10101 form a rectangular array arrangement, the disc-shaped elements in the same position on each of the rollers 10101 together constitute a conveyor line for the conveyance of the individual workpieces, in the present embodiment, there are 6 conveying lines, and the design distance is determined according to 6 conveying lines, so that 6 workpieces 9 (mainly for long workpieces such as automobile longitudinal beams, cross beams and the like) with various sizes can be transported in the first direction at the same time.

The first powder spraying device 2 and the second powder spraying device 4 are sequentially arranged along the first direction, so that powder spraying areas of the first powder spraying device and the second powder spraying device are not overlapped, disturbance between powder sprayed by the first powder spraying device and powder sprayed by the second powder spraying device in powder spraying operation is reduced, the second powder spraying device 4 is positioned on the output side of the chamber body 3, and the second powder spraying device is arranged at the rear end in the first direction, so that the number of disc-shaped members required to be contacted after the lower surface of the workpiece is sprayed can be reduced, damage to the lower spraying surface of the workpiece caused by conveying the workpiece is reduced, and the powder spraying quality is improved, such as but not limited to: in this embodiment, as shown in fig. 1 and 2, the first powder spraying device 2 is disposed on a side of the chamber body 3 close to the input window 301, the second powder spraying device 4 is disposed below a gap between two adjacent rollers 10101 closest to the output window 302, and the second powder spraying device 4 is used for spraying powder on the lower surface of the workpiece 9.

The first powder spraying device 2 comprises at least one first powder spraying gun group, the second powder spraying device 4 comprises at least one second powder spraying gun group, at least one first spray gun 201 is arranged above each conveying line, and at least one second spray gun 401 is arranged below each conveying line; here, the number of the first spray gun 201 and the second spray gun 401 is determined according to the number of the arrangement of the transfer lines and the actual spraying needs for the work pieces 9 transferred on each transfer line, for example, but not limited to: in this embodiment, as shown in fig. 3 and 4, the number of the first powder spraying gun group and the second powder spraying gun group is determined according to the number of the conveying lines, the first powder spraying device 2 includes 6 first powder spraying gun groups, the second powder spraying device 4 includes 6 second powder spraying gun groups, one first powder spraying gun group is arranged above each conveying line, the first powder spraying gun group is composed of two first spray guns 201 symmetrically arranged relative to a center line of the conveying line, one second powder spraying gun group is arranged below each conveying line, the second powder spraying gun group is composed of 3 second spray guns 401 symmetrically arranged relative to the center line of the conveying line, by the arrangement, the first powder spraying device 2 and the second powder spraying device 4 obtain a larger spraying area, and the movement device 7 is matched to enable the powder spraying of the first powder spraying device to be more uniform, meanwhile, the second spray gun 401 located in the middle of the second spray gun group is aligned to the center line of the lower surface of the workpiece 9, and the second spray guns 401 located on both sides of the second spray gun group are aligned to the side wings of the workpiece 9, so that the second powder spraying device 4 can perform spraying work on both the lower surface and the side surfaces of the workpiece 9.

As shown in fig. 2, 5 and 6, in the present embodiment, the disk-shaped members include a first disk-shaped member 10102 and a second disk-shaped member 10103, the first disk-shaped member 10102 is disposed on each of the rollers 10101 located on the front side of the second powder spraying device 4 in the first direction (i.e., on the left side of the second powder spraying device 4 in fig. 2), and the second disk-shaped member 10103 is disposed on each of the rollers 10101 located on the rear side of the second powder spraying device in the first direction (i.e., on the right side of the second powder spraying device 4 in fig. 2);

since the portion of the lower surface of the workpiece 9 in contact with the first disc-shaped member 10102 is not yet sprayed by the second spray gun 401, the first disc-shaped member 10102 may be selected from various types of rollers (for example, but not limited to, in the present embodiment, as shown in fig. 7, the first disc-shaped member 10102 includes a first sleeve fixedly connected to the roller and discs disposed on both sides of the first sleeve, the diameter of the discs is larger than that of the roller, and the first sleeve is fixedly connected to the roller 10101 by a pin);

the second disc-shaped member 10103 comprises a second sleeve fixedly connected to the roller 10101 and teeth uniformly distributed on the side surface of the second sleeve in the circumferential direction, the first disc-shaped member 10102 has the same height with respect to the roller as the teeth of the second disc-shaped member 10103 has with respect to the roller and is larger than the height of the flank of the workpiece 9, the teeth are arranged in various ways (for example, but not limited to, as shown in fig. 8 and 9, the second disc-shaped member 10103 comprises a second sleeve and a plurality of ejector pins arranged on the left and right ends of the side surface of the second sleeve, the ejector pins are uniformly distributed on the second sleeve in the circumferential direction, one end of each ejector pin is fixedly connected to the second sleeve, the other end of each ejector pin is a conical tip for supporting the workpiece, and the part of the lower surface of the workpiece 9 sprayed by the second spray gun 401 only needs to be in contact with the conical tips of the ejector pins during the subsequent transportation, the contact area is further reduced, the damage to the sprayed lower surface of the workpiece 9 caused by conveying the workpiece is reduced, and the powder spraying quality is further improved.

As shown in fig. 2 and 4, the recycling device 5 is installed on a bottom plate in the chamber body 3, after the workpiece 9 enters the powder spraying area, the first spray gun 201 and the second spray gun 401 start to work, uniformly spray out powder and attach to all surfaces of the workpiece 9, the recycling device 5 is used for recycling excess powder, and the function of the recycling device 5 can be realized by selecting various devices, such as but not limited to: in this embodiment, the recycling device 5 is a vacuum dust collector, and the excess powder can be recycled by the recycling device 5.

In order to realize automatic cleaning of the powder residual on the carrying unit in the chamber body and avoid the spraying quality from being affected by the contamination of the powder residual on the carrying unit on the surface of the workpiece, the invention provides that a powder blowing mechanism 6 is arranged below the first disc-shaped component 10102 in the chamber body 3, and the powder blowing mechanism 6 is used for cleaning the powder on the surface of the first disc-shaped component 10102 in the chamber body 3. "is used in the technical scheme.

The above technical solutions have various embodiments in practical applications, such as but not limited to: in this embodiment, as shown in fig. 1, fig. 2 and fig. 7, the powder blowing mechanism 6 includes an air pipe 601 and a plurality of air nozzles 602, two air nozzles are symmetrically disposed below the first disk-shaped component 10102 in the chamber, the two symmetrically disposed air nozzles are respectively aligned to the circumferential surfaces of the two disks of the first disk-shaped component 10102, the air nozzles 602 are communicated with the air pipe 601, and the air pipe 601 externally connects with compressed air.

Since in this embodiment the roller 10101 does not contact the workpiece 9, the lower surface of the workpiece 9 only contacts the disk-shaped member, and the workpiece 9 only contacts the tip of the ejector pin of the second disk-shaped member 10103, the air nozzle 602 is provided only under the first disk-shaped member disposed inside the chamber 3 in this embodiment, considering that it is difficult for the powder to adhere to the tip of the ejector pin, but it is not excluded that the air nozzle 602 is also provided under the second disk-shaped member 10103 in the chamber 3.

The work flow of spraying by using the spraying system provided by the embodiment has various setting modes, such as but not limited to: after the workpiece 9 at least partially enters the chamber body 3 through the input window 301 on the conveying device 1, the first powder spraying device 2, the second powder spraying device 4 and the recovery device 5 are started, the workpiece 9 is driven by the conveying device 1 to move at a constant speed, powder is sprayed on the upper surface of the workpiece 9 through the first spray gun 201, powder is sprayed on the lower surface of the workpiece 9 through the second spray gun 401, meanwhile, the first spray gun 201 and the second spray gun 401 jointly consider the powder spraying on the side surface of the workpiece 9, and whether the moving device 7 is started to drive the first spray gun 201 to move up and down or move back and forth in the second direction can be determined according to actual spraying requirements.

The area where the workpiece 9 is completely sprayed leaves the chamber body 3 through the output window 302, after the whole workpiece 9 is completely sprayed, the first powder spraying device 2 and the second powder spraying device 4 stop working, and at the same time, the powder blowing mechanism 6 starts working, so as to blow off residual powder coated on the first disk-shaped member 10102 in the chamber body 3 through compressed air flow, thereby avoiding powder accumulation and avoiding affecting the quality of subsequent powder spraying on the lower surface of the workpiece 9.

The invention is suitable for the powder spraying operation of a long-strip-shaped or plate-shaped workpiece, in particular to the powder spraying operation of the frame longitudinal beam.

In conclusion, the powder spraying and recycling system provided by the invention has the advantages of small occupied space, factory area saving, high powder spraying quality, less generated waste, less end treatment requirement and good environmental protection; the total cost is lower than that of the traditional electrophoresis process, and the economy is good.

The electronic control unit is not described in detail in this specification, which belongs to the prior art known to those skilled in the art, and thus, the description is omitted.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A powder spray coating system characterized by: comprises a first powder spraying device, a second powder spraying device, a conveying device and a chamber body; the conveying device comprises a carrying unit, the carrying unit penetrates through two parallel side faces of the chamber body and is used for conveying workpieces along a first direction, the first powder spraying device and the second powder spraying device are arranged in the chamber body, the first powder spraying device can move along the vertical or horizontal direction and is used for spraying powder on the upper surface of the workpieces from top to bottom, the second powder spraying device is used for spraying powder on the lower surface of the workpieces from bottom to top, and the first powder spraying device and the second powder spraying device are arranged in a staggered mode in the first direction.

2. The powder coating system of claim 1, wherein: the carrying unit comprises a plurality of rollers which are arranged in parallel, a plurality of disc-shaped components for supporting and transmitting the workpieces are arranged on each roller at intervals, and the disc-shaped components are coaxial with the rollers.

3. The powder coating system of claim 1, wherein: the first powder spraying device and the second powder spraying device are sequentially arranged along the first direction, and the second powder spraying device is positioned on the output side of the chamber body.

4. The powder coating system of claim 2, wherein: the disk-like members include a first disk-like member provided on each of the rollers located on the rear side in the first direction from the second powder spraying means, and a second disk-like member provided on each of the rollers located on the front side in the first direction from the second powder spraying means;

5. The powder coating system of claim 4, wherein: the first disc-shaped member includes a first sleeve fixedly coupled to the drum and discs disposed at both sides of the first sleeve, the discs having a diameter greater than that of the drum.

6. The powder coating system of claim 4, wherein: the second disc-shaped component comprises a second sleeve fixedly connected to the roller and a plurality of ejector pins circumferentially distributed on the side surface of the second sleeve at intervals, one ends of the ejector pins are fixedly connected to the second sleeve, the other ends of the ejector pins are conical tops, and the conical tops are used for supporting the workpiece.

7. The powder coating system of claim 4, wherein: the second powder spraying device comprises a plurality of second powder spraying gun groups, each second powder spraying gun group comprises three second spray guns which are sequentially arranged along a second direction, the second direction is horizontal and perpendicular to the first direction, the second spray guns located in the middle of the second powder spraying gun groups are aligned to the lower surface of the workpiece, and the second spray guns located on two sides of the second powder spraying gun groups are arranged relative to the side wings of the workpiece.

8. A powder spray coating system as set forth in claim 4, wherein: and powder blowing mechanisms are arranged below the first disc-shaped members in the chamber body and are used for removing powder on the surfaces of the first disc-shaped members in the chamber body.

9. The powder coating system of claim 1, wherein: the recovery device is arranged on a bottom plate in the chamber body and is used for recovering redundant powder.

10. The powder coating system of claim 1, wherein: the powder spraying device comprises a first powder spraying device and a moving device, wherein the first powder spraying device is fixedly connected with the moving device, and the moving device is used for controlling the first powder spraying device to move.