An environmentally friendly powder coating spraying device and its usage method

Abstract

This invention relates to the field of powder coating technology, and more particularly to an environmentally friendly powder coating spraying device and its usage method. The device includes a base, a spray chamber, and a conveyor belt. The spray chamber is fixedly installed on the base. A conveyor belt is located on the top of the spray chamber, and hooks for suspending workpieces are installed at intervals on the bottom side of the conveyor belt. A spraying mechanism capable of spraying simultaneously from both sides is installed on the spray chamber. The device also includes a cleaning mechanism, which comprises a turntable, brushes, and a housing. Rotatable turntables are symmetrically installed on both sides of the spray chamber, and the turntables are equipped with brushes extending vertically inward. This invention, through the cleaning mechanism and the cooperation of a transmission mechanism, enables the pull rod to rotate the turntable when moving horizontally. This allows the workpiece to move relative to the brushes along with the conveyor belt, while the brushes rotate with the turntable, resulting in a more comprehensive and thorough cleaning of the workpiece surface, facilitating subsequent spraying processes.

Description

Technical Field

[0001] This invention relates to the field of powder coating technology, and in particular to an environmentally friendly powder coating spraying device and its usage method. Background Technology

[0002] Powder coating is a process in which powder coating equipment is used to spray powder coating onto the surface of a workpiece. Under the action of electrostatics, the powder will be evenly adsorbed onto the surface of the workpiece to form a powder coating. The powder coating is then baked at high temperature to flow and cure, becoming a final coating with different effects (different types of powder coatings have different effects). The coating effect of powder coating is superior to that of spray painting in terms of mechanical strength, adhesion, corrosion resistance, and aging resistance, but the cost is higher than that of spray painting.

[0003] To fully utilize the properties of powder coating and extend its service life, workpieces require surface pretreatment processes such as chromating (aluminum), phosphating (iron), or sandblasting before spraying. These pretreatment residues can easily remain on the surface, and if not properly cleaned, they can affect subsequent spraying. However, traditional spraying equipment requires manual cleaning of the pretreated workpiece surface before it is sent to the spraying area. Manual cleaning can easily result in some areas being missed and not thoroughly cleaned. Furthermore, the efficiency of workpiece transport is limited by the efficiency of manual cleaning, leading to reduced overall processing efficiency, increased processing time, and higher production costs. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides an environmentally friendly powder coating spraying device and its usage method.

[0005] The technical solution of the present invention is: an environmentally friendly powder coating spraying device and its usage method, comprising a base, a spraying chamber, a conveyor belt, hooks, and a spraying mechanism. The spraying chamber is fixedly installed on the base. A conveyor belt is provided on the top of the spraying chamber. Hooks for suspending workpieces are installed at intervals on the bottom side of the conveyor belt. A spraying mechanism capable of spraying from both sides simultaneously is installed on the spraying chamber. The device also includes a cleaning mechanism, which comprises a turntable, brush bristles, a housing, a pull rod, and a transmission structure. Rotatable turntables are symmetrically installed on both sides of the spraying chamber. Bristles extending vertically inward are provided on the turntables. A housing is fixedly installed on the outer side of the spraying chamber. A horizontally sliding pull rod is provided on the housing. The gripping part of the pull rod is located on the outer side of the housing. A transmission structure is provided between the pull rod and the turntable to convert horizontal linear motion into rotational motion.

[0006] To further explain, the transmission structure includes a guide frame, a rack, a gear, and an elastic element. The guide frame is fixedly installed on the outer wall of the spray booth inside the housing. A rack is slidably connected to the guide frame. The end of the rack is fixedly connected to a pull rod. A gear is coaxially connected to the outside of the turntable. The rack and the gear mesh. An elastic element connects the pull rod and the guide frame.

[0007] To further explain, the spraying mechanism includes a powder supply box, a spray gun, a sealing brush, a powder conveying pipe, an electric push rod, and a support. The powder supply box is installed on the top of the spraying chamber, and symmetrical grooves are provided on both sides of the spraying chamber. A sealing brush is installed inside the groove, and a spray gun that can slide up and down is provided in the groove. A powder conveying pipe connects the spray gun and the powder supply box. An electric push rod is fixedly installed on the outside of the spraying chamber, and a support is fixedly connected to the movable part of the electric push rod. The support is connected to the spray gun.

[0008] To further explain, it also includes a pushing mechanism, which includes a support rod, a roller, and a wedge block. A support rod extending vertically outward is fixedly connected to the support, and a roller is installed at the end of the support rod. A wedge block adapted to the roller is fixedly installed on the pull rod. When the roller on the support rod moves, it can squeeze and push the wedge block to drive the pull rod to move.

[0009] To further explain, it also includes a recycling mechanism, which includes a recycling bin, a negative pressure fan, and a bin door. Recycling bins are symmetrically installed on both sides of the spray booth. The spray booth is equipped with a negative pressure fan for sucking the paint into the recycling bin. A rotatable bin door is installed at the bottom of the recycling bin.

[0010] Further explanation: It also includes a curing mechanism, which includes a lamp holder, an infrared lamp tube, a fixing plate, and a partition. The lamp holders are symmetrically installed on the inside of the spraying chamber, and the lamp holders are equipped with infrared lamp tubes. The spraying chamber is equipped with a fixing plate that protrudes vertically inward. A partition that can be electrically controlled to rotate and open is installed on the side of the fixing plate. The fixing plate and the partition work together to separate the drying area in the spraying chamber.

[0011] To further explain, it also includes a cooling mechanism, which includes a cooling box and an air outlet. The cooling boxes are symmetrically installed on the spray booth, and the cooling boxes are provided with air outlets facing inward.

[0012] To further explain, it also includes a partition mechanism, which includes a baffle, a convex rail, and a guide block. One end of the spray chamber is provided with a slidable baffle, a convex rail is fixedly provided on the baffle, and a guide block adapted to the convex rail is fixedly installed on the spray chamber.

[0013] Further explanation: The method of using the aforementioned environmentally friendly powder coating spraying device includes the following steps:

[0014] 1) The pre-treated workpieces are suspended sequentially on the hooks on the bottom side of the conveyor belt, so that the conveyor belt transports the workpieces to the spraying chamber;

[0015] 2) The workpiece moves to the turntable with the conveyor belt. The electric push rod is controlled to work. The pull rod moves back and forth in a horizontal linear motion with the support. The turntable is driven to rotate through the transmission mechanism to clean the surface of the workpiece.

[0016] 3) The workpiece moves to the spray gun with the conveyor belt. The powder supply box is controlled to send the powder coating along the conveyor pipe to the spray gun. The spray gun moves with the electric push rod to spray the workpiece surface. At the same time, the negative pressure fan is driven to suck the scattered coating into the recovery box.

[0017] 4) Control the partition to rotate and open, and the conveyor belt will send the coated workpieces into the coating area in sequence. After the number of workpieces in the coating area reaches the upper limit, control the partition to rotate and close, and drive the infrared lamp to work to heat and cure the coating on the workpiece surface.

[0018] 5) The workpiece moves to the cooling box with the conveyor belt, and the cooling box is controlled to blow out cold air to quickly cool the coating on the surface of the workpiece.

[0019] The present invention has the following advantages: 1. The present invention, by providing a cleaning mechanism and cooperating with the transmission mechanism, enables the pull rod to drive the turntable to rotate when moving horizontally, thereby making the workpiece move relative to the brush bristles with the conveyor belt, while the brush bristles rotate with the turntable, so as to more thoroughly brush the surface of the workpiece, thereby cleaning the surface of the workpiece and facilitating subsequent spraying processing. In addition, the pull rod is connected to the push mechanism, so that the pull rod can be electrically controlled to move, thereby achieving automatic cleaning and improving processing efficiency.

[0020] 2. The present invention can drive the spray gun to move up and down by cooperating the electric push rod and the support in the spraying mechanism, so that the powder coating can be sprayed more evenly and comprehensively. In addition, the setting of the sealing brush keeps the spraying chamber closed when the spray gun moves, preventing the scattered powder coating from drifting into the external environment and facilitating recycling.

[0021] 3. The present invention uses a recycling mechanism where a negative pressure fan generates suction to draw loose powder coating that has not adhered to the surface of the workpiece into a recycling bin for collection, thereby improving the utilization rate of powder coating and reducing powder coating waste and material costs.

[0022] 4. By combining the curing mechanism and the cooling mechanism, the present invention can rapidly heat and cure the coating on the surface of the workpiece through infrared irradiation. After curing, the workpiece can be rapidly cooled by the cold air in the cooling box, so that the workpiece can be immediately put into the next process and the processing interval time can be reduced. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 2 This is a rear view of the present invention.

[0025] Figure 3This is a three-dimensional structural diagram of the cleaning mechanism of the present invention.

[0026] Figure 4 This is a three-dimensional structural diagram of the transmission structure of the present invention.

[0027] Figure 5 This is a three-dimensional structural diagram of the spraying mechanism of the present invention.

[0028] Figure 6 This is a partially enlarged view of the spraying mechanism of the present invention.

[0029] Figure 7 This is a three-dimensional structural diagram of the actuating mechanism of the present invention.

[0030] Figure 8 This is a three-dimensional structural diagram of the recycling mechanism of the present invention.

[0031] Figure 9 This is a three-dimensional structural diagram of the curing mechanism of the present invention.

[0032] Figure 10 This is a three-dimensional structural diagram of the cooling mechanism of the present invention.

[0033] Figure 11 This is a three-dimensional structural diagram of the partition mechanism of the present invention.

[0034] In the attached diagrams: 1-base, 2-spray chamber, 3-conveyor belt, 4-hook, 5-cleaning mechanism, 51-turntable, 52-brush bristles, 53-housing, 54-pull rod, 6-transmission structure, 61-guide frame, 62-rack, 63-gear, 64-elastic element, 7-spraying mechanism, 71-powder supply box, 72-spray gun, 73-sealing brush, 74-powder conveying pipe, 75-electric push rod, 76-support, 8-push Moving mechanism, 81-support rod, 82-roller, 83-wedge block, 9-recycling mechanism, 91-recycling box, 92-negative pressure fan, 93-box door, 10-curing mechanism, 101-lamp holder, 102-infrared lamp tube, 103-fixing plate, 104-partition, 11-cooling mechanism, 111-cooling box, 112-air outlet, 12-partition mechanism, 121-baffle, 122-convex rail, 123-guide block. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0036] Example 1

[0037] An environmentally friendly powder coating spraying device and its usage method, such as Figures 1-6As shown, the system includes a base 1, a spray chamber 2, a conveyor belt 3, hooks 4, and a spraying mechanism 7. The spray chamber 2 is fixed to the base 1 by bolts. The spray chamber 2 is a hollow rectangular tube, and its interior can be divided into three parts: a cleaning area, a spraying area, and a drying area. The top of the spray chamber 2 is equipped with a conveyor belt 3 that can move linearly in a horizontal direction. Hooks 4 for suspending workpieces are installed at intervals on the bottom side of the conveyor belt 3. The spraying mechanism 7, which can spray from both sides simultaneously, is installed on the spray chamber 2. The system also includes a cleaning mechanism 5 for cleaning the surface of the workpiece. The cleaning mechanism 5 includes a turntable 51 and brushes 52. The spray chamber 2 has a housing 53, a pull rod 54, and a transmission structure 6. Rotatable turntables 51 are symmetrically installed on both sides of the spray chamber 2. There are three sets of vertically arranged turntables 51. Brush bristles 52 extending vertically inward are glued to the turntables 51 with strong adhesive. The brush bristles 52 are made of flexible material. A housing 53 is welded to the outside of the spray chamber 2 to cover the turntables 51. A horizontally sliding pull rod 54 is provided on the housing 53. The horizontal bar of the pull rod 54 extends through the housing. The gripping part of the pull rod 54 is located on the outside of the housing 53. A transmission structure 6 is provided between the pull rod 54 and the turntables 51 to convert horizontal linear motion into rotational motion.

[0038] like Figure 4 As shown, the transmission structure 6 includes a guide frame 61, a rack 62, a gear 63, and an elastic element 64. The housing 53 has a guide frame 61 that is bolted to the outer wall of the spray chamber 2. The guide frame 61 is E-shaped. A rack 62 with its teeth facing upwards is slidably connected to the horizontal part of the guide frame 61. The end of the rack 62 is fixedly connected to the pull rod 54 by welding. A gear 63 is coaxially connected to the outside of the turntable 51. The gear 63 can drive the turntable 51 to rotate synchronously. The rack 62 and the gear 63 mesh. An elastic element 64 is connected between the pull rod 54 and the guide frame 61. The elastic element 64 can be a stainless steel compression spring.

[0039] When using this device, the pre-treated workpiece is suspended on the hook 4 and moves synchronously with the conveyor belt 3. When the workpiece moves between the turntables 51 on both sides, the control lever 54 slides horizontally, causing it to drive the rack 62 to move linearly towards the guide frame 61. The elastic element 64 is compressed by force, and the rack 62 pushes the gear 63 to rotate, causing the turntable 51 to rotate. Then the lever 54 is released, and the elastic element 64 returns to its original position, causing the lever 54 and the rack 62 to move in the opposite direction. The turntable 51 rotates in the opposite direction through the gear 63. During the reciprocating rotation of the turntable 51, the brush bristles 52 on the inner side of the turntable 51 brush the surface of the workpiece to remove the pre-treatment residue on the surface of the workpiece, keeping the surface of the workpiece clean and smooth. Then the workpiece is transported to the spraying area by the conveyor belt 3 for spraying.

[0040] like Figure 5 and Figure 6As shown, the spraying mechanism 7 includes a powder supply box 71, a spray gun 72, a sealing brush 73, a powder conveying pipe 74, an electric push rod 75, and a support 76. The powder supply box 71 is bolted to the top of the spraying chamber 2. The powder supply box 71 integrates a powder pump. The powder coating is contained in the powder supply box. Six vertical grooves are symmetrically arranged on both sides of the spraying chamber 2. The sealing brush 73 is installed inside the groove and fills it. The brush part of the sealing brush 73 is made of flexible material. The spray gun 72, which can slide up and down, is arranged in the groove. There are six sets of spray guns 72. The powder conveying pipe 74 connects the spray gun 72 and the powder supply box 71. The electric push rod 75 is fixedly installed on the outside of the spraying chamber 2 by bolts. The support 76 is fixedly connected to the movable part of the electric push rod 75 by screws. The support 76 is connected to three sets of spray guns 72 on the same side.

[0041] When the workpiece moves to the spraying area, it is positioned between the two spray guns 72. The electric push rod 75 drives the support 76 to reciprocate in a vertical direction, which in turn drives the spray gun 72 on the support 76 to slide up and down along the chute. This allows the environmentally friendly powder coating in the powder supply box 71 to be fed into the spray gun 72 along the powder conveying pipe 74. The spray gun 72 then evenly sprays the powder coating onto the workpiece surface as it moves, forming a coating film. Subsequently, the workpiece can be moved to the drying area by the conveyor belt 3. Any unattached powder coating is retained in the spraying chamber 2 by the sealing brush 73 for subsequent recycling.

[0042] like Figure 7 As shown, it also includes a pushing mechanism 8 for moving the pull rod 54. The pushing mechanism 8 includes a support rod 81, a roller 82 and a wedge block 83. The support rod 81 is fixedly connected to the support 76 by bolts, extending vertically outward. The roller 82 is inserted into the end of the support rod 81. The wedge block 83, which is adapted to the roller 82, is fixedly installed on the pull rod 54 by welding. The wedge block 83 is composed of a U-shaped part extending outward, a connecting part extending horizontally towards the support rod side, and a triangular part with a top inclined surface that can cooperate with the roller 82. When the roller 82 on the support rod 81 moves, it can squeeze and push the wedge block 83 to drive the pull rod 54 to move. When the roller 82 moves downward, it pushes the wedge block 83 to move towards the guide frame 61.

[0043] When the electric push rod 75 drives the support 76 to reciprocate linearly in the vertical direction, the roller 82 at the end of the vertically extended support rod 81 on the support 76 slides along the inclined surface at the top of the wedge block 83 as it moves downward, thereby squeezing the wedge block 83 and pushing the wedge block 83 to drive the pull rod 54 to move in the horizontal direction. The elastic element 64 is compressed by force. After the support rod 81 drives the roller 82 to move upward, the wedge block 83 can move back to below the roller 82 with the pull rod 54 under the reset action of the elastic element 64. Thus, while the electric push rod 75 drives the spray gun 72 to move up and down, it drives the turntable 51 to rotate and clean the surface of the workpiece to be sprayed.

[0044] Example 2

[0045] Based on Example 1, such as Figure 8 As shown, it also includes a recycling mechanism 9 for recovering scattered powder coating. The recycling mechanism 9 includes a recycling box 91, a negative pressure fan 92, and a box door 93. The recycling boxes 91 are symmetrically installed on both sides of the spraying chamber 2 by welding. The recycling box 91 consists of a long strip-shaped receiving part and a storage part with an increased bottom cross-sectional area. The spraying chamber 2 is equipped with a negative pressure fan 92 for sucking the coating into the recycling box 91. Three sets of negative pressure fans 92 are evenly arranged from top to bottom. The bottom of the recycling box 91 is hinged with a rotatable box door 93, and a U-shaped handle is fixedly installed on the outside of the box door 93.

[0046] When there is loose powder coating in the spraying chamber 2, the negative pressure fans 92 on both sides of the spraying chamber 2 can be driven to work, forming a negative pressure suction to suck the loose powder coating in the spraying chamber 2 into the recovery box 91. After the powder coating enters the recovery box 91, it can fall to the bottom and accumulate under its own gravity. After the device is used or when there is a lot of powder coating accumulated in the recovery box 91, the box door 93 can be turned to open, and the recovered powder coating can be taken out. After screening to remove impurities, it can be mixed into new powder for use in proportion.

[0047] like Figure 9 As shown, it also includes a curing mechanism 10 for heating and curing the coating. The curing mechanism 10 includes a lamp holder 101, an infrared lamp tube 102, a fixing plate 103, and a partition 104. Four sets of lamp holders 101 are symmetrically installed on the inside of the spray chamber 2 by bolts. The lamp holders 101 are equipped with vertically installed long strip infrared lamp tubes 102. The fixing plate 103 is welded inwardly vertically protruding inside the spray chamber 2. The side of the fixing plate 103 is equipped with a partition 104 that can be electrically controlled to rotate and open. The partition 104 is composed of a rotating shaft part and a flat plate part that can rotate relative to the fixing plate. The fixing plate 103 and the partition 104 cooperate to separate the drying area in the spray chamber 2.

[0048] After the workpiece is sprayed, the control partition 104 is rotated to open, so that the workpiece is sent into the drying area by the conveyor belt 3. When the drying area is full of workpieces to be dried, the drive partition 104 is rotated to close, so as to isolate the drying area in the spraying chamber 2 from other areas. Then the infrared lamp tube 102 in the control lamp holder 101 is lit up, so that the temperature of the drying area rises and the workpiece surface coating is rapidly heated and cured.

[0049] like Figure 10 As shown, it also includes a cooling mechanism 11 for rapidly cooling and fixing the coating film. The cooling mechanism 11 includes a cooling box 111 and an air outlet 112. The cooling box 111 is symmetrically installed on the spraying chamber 2 by bolts. The cooling box 111 is mainly composed of a fan, a cooling pipe and a condenser. The cooling box 111 is provided with an air outlet 112 facing inward.

[0050] When the coating on the workpiece surface has cured and needs to be immediately sent to the next process, the cooling box 111 can be driven to work, and cold air can be blown out through the air outlet 112 to quickly cool the cured coating on the workpiece so that the workpiece can be sent to the next process with the conveyor belt 3. When the next process does not need to be carried out immediately, the cooling box 111 can be turned off to allow the coating on the workpiece surface to cool naturally.

[0051] like Figure 11 As shown, it also includes a partition mechanism 12 for separating the inner and outer spaces of the device. The partition mechanism 12 includes a baffle 121, a convex rail 122 and a guide block 123. One end of the spray chamber 2 is provided with a horizontally sliding baffle 121. The side of the baffle 121 near the spray chamber 2 is provided with an integrally formed convex rail 122. Two sets of convex rails 122 are symmetrically arranged vertically. The spray chamber 2 is fixedly installed with a guide block 123 that matches the convex rail 122 by welding. The other side of the spray chamber 2 is provided with a groove that matches the convex rail 122.

[0052] The method of using the environmentally friendly powder coating spraying device includes the following steps:

[0053] 1) The pre-treated workpieces are suspended sequentially on the hooks 4 on the bottom side of the conveyor belt 3, so that the conveyor belt 3 transports the workpieces to the spraying chamber 2.

[0054] 2) The workpiece moves to the turntable 51 along the conveyor belt 3. The electric push rod 75 is controlled to work, and the pull rod 54 moves up and down with the support 76 to make reciprocating linear motion in the horizontal direction. The turntable 51 is driven to rotate through the transmission mechanism to clean the surface of the workpiece.

[0055] 3) The workpiece moves with the conveyor belt 3 to the spray gun 72. The powder supply box 71 is controlled to send the powder coating along the conveyor pipe to the spray gun 72, so that the spray gun 72 moves with the electric push rod 75 to spray the surface of the workpiece. At the same time, the negative pressure fan 92 is driven to work to suck the scattered coating into the recovery box 91.

[0056] 4) Control the partition 104 to rotate and open, and the conveyor belt 3 will sequentially send the coated workpieces into the coating area. After the number of workpieces in the coating area reaches the upper limit, control the partition 104 to rotate and close, and drive the infrared lamp tube 102 to work to heat and cure the coating on the workpiece surface.

[0057] 5) The workpiece moves with the conveyor belt 3 to the cooling box 111, and the cooling box 111 is controlled to blow out cold air to quickly cool the coating on the surface of the workpiece.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An environmentally friendly powder coating spraying device, characterized in that: The system includes a base (1), a spray chamber (2), a conveyor belt (3), hooks (4), and a spraying mechanism (7). The spray chamber (2) is fixedly installed on the base (1). The top of the spray chamber (2) is provided with a conveyor belt (3). Hooks (4) for suspending workpieces are installed at intervals on the bottom side of the conveyor belt (3). The spraying mechanism (7) that can spray from both sides simultaneously is installed on the spray chamber (2). The system also includes a cleaning mechanism (5), which includes a turntable (51), bristles (52), and a housing (53). 53), pull rod (54) and transmission structure (6), rotatable turntables (51) are symmetrically installed on both sides of the spraying chamber (2), and brush bristles (52) extending vertically inward are provided on the turntables (51). A housing (53) is fixedly installed on the outside of the spraying chamber (2), and a pull rod (54) that can slide horizontally is provided on the housing (53). The gripping part of the pull rod (54) is located on the outside of the housing (53). A transmission structure (6) that converts horizontal linear motion into rotational motion is provided between the pull rod (54) and the turntable (51). The transmission structure (6) includes a guide frame (61), a rack (62), a gear (63), and an elastic element (64). The housing (53) is provided with a guide frame (61) fixedly installed on the outer wall of the spray chamber (2). A rack (62) is slidably connected to the guide frame (61). The end of the rack (62) is fixedly connected to the pull rod (54). A gear (63) is coaxially connected to the outside of the turntable (51). The rack (62) and the gear (63) mesh. An elastic element (64) is connected between the pull rod (54) and the guide frame (61). The spraying mechanism (7) includes a powder supply box (71), a spray gun (72), a sealing brush (73), a powder conveying pipe (74), an electric push rod (75), and a support (76). The powder supply box (71) is installed on the top of the spraying chamber (2). The spraying chamber (2) is symmetrically provided with sliding grooves on both sides. The sealing brush (73) is installed on the inner side of the sliding groove. The spray gun (72) that can slide up and down is provided in the sliding groove. The powder conveying pipe (74) is connected between the spray gun (72) and the powder supply box (71). The electric push rod (75) is fixedly installed on the outer side of the spraying chamber (2). The support (76) is fixedly connected to the movable part of the electric push rod (75). The support (76) is connected to the spray gun (72). It also includes a pushing mechanism (8), which includes a support rod (81), a roller (82) and a wedge block (83). A support rod (81) extending vertically outward is fixedly connected to the support (76). A roller (82) is installed at the end of the support rod (81). A wedge block (83) that matches the roller (82) is fixedly installed on the pull rod (54). When the roller (82) on the support rod (81) moves, it can squeeze and push the wedge block (83) to drive the pull rod (54) to move.

2. The environmentally friendly powder coating spraying device according to claim 1, characterized in that: It also includes a recycling mechanism (9), which includes a recycling box (91), a negative pressure fan (92) and a box door (93). The recycling boxes (91) are symmetrically installed on both sides of the spraying chamber (2). The spraying chamber (2) is equipped with a negative pressure fan (92) for sucking the paint into the recycling box (91). The bottom of the recycling box (91) is equipped with a rotatable box door (93).

3. The environmentally friendly powder coating spraying device according to claim 2, characterized in that: It also includes a curing mechanism (10), which includes a lamp holder (101), an infrared lamp tube (102), a fixing plate (103) and a partition (104). The lamp holder (101) is symmetrically installed inside the spraying chamber (2). The lamp holder (101) is equipped with an infrared lamp tube (102). The spraying chamber (2) is equipped with a fixing plate (103) that protrudes vertically inward. The side of the fixing plate (103) is equipped with a partition (104) that can be electrically controlled to rotate and open. The fixing plate (103) and the partition (104) work together to separate the drying area in the spraying chamber (2).

4. The environmentally friendly powder coating spraying device according to claim 3, characterized in that: It also includes a cooling mechanism (11), which includes a cooling box (111) and an air outlet (112). The cooling box (111) is symmetrically installed on the spraying chamber (2), and the cooling box (111) is provided with an air outlet (112) facing inward.

5. The environmentally friendly powder coating spraying device according to claim 4, characterized in that: It also includes a partition mechanism (12), which includes a baffle (121), a convex rail (122) and a guide block (123). One end of the spraying chamber (2) is provided with a slidable baffle (121), a convex rail (122) is fixedly provided on the baffle (121), and a guide block (123) adapted to the convex rail (122) is fixedly installed on the spraying chamber (2).

6. The method of using the environmentally friendly powder coating spraying device according to claim 5, characterized in that: The method of using the environmentally friendly powder coating spraying device includes the following steps: 1) The pre-treated workpieces are hung sequentially on the hooks (4) on the bottom side of the conveyor belt (3) so that the conveyor belt (3) transports the workpieces to the spraying chamber (2). 2) The workpiece moves to the turntable (51) along the conveyor belt (3), and the electric push rod (75) is controlled to work. The pull rod (54) moves up and down with the support (76) and reciprocates in a straight line in the horizontal direction. The turntable (51) is driven to rotate by the transmission mechanism to clean the surface of the workpiece. 3) The workpiece moves to the spray gun (72) along the conveyor belt (3), and the powder supply box (71) is controlled to send the powder coating along the conveyor pipe to the spray gun (72), so that the spray gun (72) moves with the electric push rod (75) to spray the surface of the workpiece. At the same time, the negative pressure fan (92) is driven to work and suck the scattered coating into the recovery box (91). 4) The control partition (104) rotates and opens, and the conveyor belt (3) sequentially sends the workpieces after spraying into the spraying area. After the number of workpieces in the spraying area reaches the upper limit, the control partition (104) rotates and closes, and drives the infrared lamp tube (102) to work to heat and solidify the coating on the workpiece surface. 5) The workpiece moves along the conveyor belt (3) to the cooling box (111), and the cooling box (111) is controlled to blow out cold air to quickly cool the coating on the surface of the workpiece.

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