Width-adjustable powder spraying device

By setting an adjustment plate in the powder spraying device, the problem of difficult adjustment of the powder spraying width is solved, enabling effective powder spraying of coated glass of different widths, reducing powder waste, and improving the applicability of the powder spraying device.

CN223931692UActive Publication Date: 2026-02-24HEBEI ZICHUANG GLASS TECH CO LTD
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Patent Information

Application Number
CN202520322070.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-27
Publication Date
2026-02-24
Estimated Expiration
2035-02-27

AI Technical Summary

Technical Problem

The existing powder spraying equipment has difficulty in adjusting the spraying width, resulting in waste of powder material when spraying coated glass with a narrow width.

Method used

An adjustable powder spraying device was designed. By sliding an adjustment plate with an adjustment mechanism inside the powder spraying tube, the length of the part connecting the inner cavity of the powder spraying tube and the feeding mechanism is changed, thereby adjusting the number of nozzles and realizing the adjustment of the powder spraying width.

Benefits of technology

This reduces powder waste when spraying powder onto narrow coated glass, and improves the applicability and material utilization of the powder spraying device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a width-adjustable powder spraying device. A plurality of groups of conveying rollers are arranged at the top of a conveying frame; the mounting frame is arranged above the conveying frame, and a mounting cavity is formed in the mounting frame; the powder spraying pipe is horizontally arranged in the mounting cavity, the powder spraying pipe is arranged perpendicular to the conveying direction of the conveying frame, and a plurality of spraying heads are evenly arranged at the bottom of the powder spraying pipe; the feeding mechanism is arranged on one side of the conveying frame and connected with one end of the powder spraying pipe, and the feeding mechanism is used for conveying materials to the powder spraying pipe and spraying the materials out of the spraying head; the adjusting mechanism is provided with a cylindrical adjusting plate, the adjusting plate is slidably arranged in the powder spraying pipe in the axial direction of the powder spraying pipe, and the side wall of the adjusting plate is sealed on the inner wall of the powder spraying pipe. By arranging the adjusting plate of the adjusting mechanism, when the adjusting plate slides in the powder spraying pipe, the length of the part, communicated with the feeding mechanism, of the inner cavity of the powder spraying pipe can be changed, then the number of the spraying heads capable of spraying powder is changed, and the purpose of changing the powder spraying width is achieved.
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Description

Technical Field

[0001] This utility model belongs to the technical field of glass processing equipment, and more specifically, it relates to a powder spraying device with adjustable width. Background Technology

[0002] Coated glass is made by coating one or more layers of metal, alloy, or metal compound film onto the surface of glass to alter its optical properties and meet specific requirements. Based on different characteristics, coated glass can be classified into the following categories: heat-reflective glass, low-emissivity glass, and conductive film glass, etc.

[0003] In the production of coated glass, after the coating process is completed, in order to prevent the glass from sticking together, powder needs to be sprayed onto the coated glass before stacking it. The so-called powder is essentially a kind of small plastic particles.

[0004] However, the powder spraying width of existing powder spraying devices is difficult to adjust, while coated glass has different widths, which leads to waste of powder material when powder spraying coated glass with a smaller width. Utility Model Content

[0005] The purpose of this invention is to provide a powder spraying device with adjustable width, so as to facilitate the adjustment of the powder spraying width.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A width-adjustable powder spraying device is provided, comprising a conveyor frame, a mounting frame, a powder spraying pipe, a feeding mechanism, and an adjusting mechanism. The conveyor frame has multiple sets of conveying rollers at its top; the mounting frame is positioned above the conveyor frame and has a mounting cavity; the powder spraying pipe is horizontally positioned within the mounting cavity, and its arrangement is perpendicular to the conveying direction of the conveyor frame; multiple nozzles are evenly distributed at the bottom of the powder spraying pipe; the feeding mechanism is located on one side of the conveyor frame and connected to one end of the powder spraying pipe, and is used to convey material to the powder spraying pipe and have it sprayed out by the nozzles; the adjusting mechanism has a cylindrical adjusting plate, which slides axially within the powder spraying pipe, and the sidewall of the adjusting plate is sealed to the inner wall of the powder spraying pipe.

[0007] In one possible implementation, the mounting frame includes two mounting vertical plates and a mounting horizontal plate. The mounting vertical plates are respectively disposed on both sides of the conveyor frame, and the mounting horizontal plate is connected to the top of the two mounting vertical plates. The gap between the two mounting vertical plates is the mounting cavity, and the two ends of the powder spraying pipe are respectively disposed on the mounting vertical plates.

[0008] In one possible implementation, the adjustment mechanism includes a drive plate, a lead screw, a handle, and a connecting assembly. The lead screw is rotatably disposed between the two mounting vertical plates. The handle is disposed on the outside of the mounting vertical plate and is connected to the lead screw. Shaking the handle can drive the lead screw to rotate. The drive plate is screwed onto the lead screw, and the connecting assembly is connected between the adjustment plate and the adjustment plate.

[0009] In one possible implementation, the connecting assembly includes an adjusting hole, an adjusting rod, and a baffle. The adjusting hole is located at the top of the powder spraying pipe. The adjusting rod is inserted into the adjusting hole, and its front and rear sides abut against the sidewalls of the adjusting hole. The bottom end of the adjusting rod is connected to the adjusting plate, and the top end of the adjusting rod is connected to the drive plate. The baffle conforms to the powder spraying pipe and covers the top of the powder spraying pipe. The baffle is connected to the adjusting rod, and the length of the baffle is not less than the length of the adjusting hole. Along the sliding direction of the adjusting rod, the baffle is located upstream of the adjusting rod, and the connection between the feeding mechanism and the powder spraying pipe is located upstream of the adjusting rod.

[0010] In one possible implementation, the powder spraying pipe has grooves on both sides, and the bottom end of the baffle has a slider. The slider is inserted into the groove, and when the slider is inserted into the groove, the inner wall of the baffle abuts against the outer wall of the powder spraying pipe.

[0011] In one possible implementation, the conveyor frame includes two vertical conveyor plates, a horizontal conveyor plate, multiple support legs, and multiple conveyor rollers. The vertical conveyor plates are arranged vertically, the horizontal conveyor plate is connected to the bottom of the two vertical conveyor plates, the conveyor rollers are rotatably disposed between the vertical conveyor plates, and the support legs are disposed at the bottom of the horizontal conveyor plate.

[0012] In one possible implementation, the top of the conveying vertical plate is provided with a limiting block, and the bottom of the mounting vertical plate is provided with a limiting groove. The mounting vertical plate corresponds one-to-one with the conveying vertical plate, and the limiting block is inserted into the corresponding limiting groove.

[0013] In one possible implementation, the conveying vertical plate is provided with a discharge port, and a receiving hopper is provided on the outer side of the conveying vertical plate. The bottom of the receiving hopper is connected to a storage cylinder, and the top of the receiving hopper is flush with the bottom of the discharge port. A guide plate is provided on the top of the conveying horizontal plate, and the guide plate is located below the conveying roller. The horizontal width of the guide plate is the same as the width of the conveying horizontal plate. The guide plate is arranged from low to high from the side closer to the discharge port to the side farther away from the discharge port.

[0014] In one possible implementation, the mounting frame is provided with sealing covers on both sides. The sealing covers are L-shaped, with the vertically arranged portion of the sealing cover abutting against the mounting frame and the horizontally arranged portion of the sealing cover covering the top of the conveyor frame. The conveyor frame, the mounting frame, and the sealing covers form a spraying chamber.

[0015] In one possible implementation, the horizontal portion of the sealing cover is provided with first limiting plates on both sides, the first limiting plates are located on the outside of the conveying vertical plate and abut against the conveying vertical plate; one end of the vertical portion of the sealing cover is provided with a second limiting plate, the second limiting plate is n-shaped and overlaps the outside of the mounting frame.

[0016] The beneficial effects of the adjustable-width powder spraying device provided by this utility model are as follows: Compared with the prior art, this utility model, by setting an adjusting plate of the adjusting mechanism, changes the length of the part connecting the inner cavity of the powder spraying tube and the feeding mechanism when the adjusting plate slides inside the powder spraying tube, thereby changing the number of nozzles that can spray powder and achieving the purpose of changing the powder spraying width. When spraying powder onto coated glass with a small width, the powder spraying width of the adjustable-width powder spraying device of this utility model is reduced, thereby reducing the waste of powder material. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of the width-adjustable powder spraying device provided in an embodiment of this utility model;

[0019] Figure 2 A schematic diagram of the structure of the conveyor frame provided in an embodiment of this utility model;

[0020] Figure 3 for Figure 2 Enlarged view of part A;

[0021] Figure 4 This is a front view structural schematic diagram of the conveyor frame provided in an embodiment of the present utility model;

[0022] Figure 5 for Figure 4 Enlarged view of part B.

[0023] The labels for the attached figures are as follows:

[0024] 1. Conveyor frame; 2. Mounting frame; 3. Powder spraying pipe; 4. Feeding mechanism; 5. Adjusting mechanism; 6. Sealing cover; 7. Control cabinet;

[0025] 101. Conveyor roller; 102. Vertical conveyor plate; 103. Horizontal conveyor plate; 104. Support leg; 105. Limiting block; 106. Discharge port; 107. Receiving hopper; 108. Storage cylinder; 109. Guide plate;

[0026] 201. Install the cavity; 202. Install the vertical plate; 203. Install the horizontal plate;

[0027] 301. Spray nozzle;

[0028] 501. Adjusting plate; 502. Drive plate; 503. Lead screw; 505. Connecting assembly; 506. Adjusting hole; 507. Adjusting rod; 508. Baffle; 509. Slide groove; 510. Slider;

[0029] 601, First limiting plate; 602, Second limiting plate. Detailed Implementation

[0030] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0031] It should be further noted that the accompanying drawings and embodiments of this utility model mainly describe the concept of this utility model. Based on this concept, some specific forms and settings of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this utility model, they can implement the above-mentioned specific forms and settings in a well-known manner.

[0032] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0033] The terms “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, and “outer” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0035] The adjustable-width powder spraying device provided by this utility model will now be described.

[0036] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The adjustable-width powder spraying device includes a conveyor frame 1, a mounting frame 2, a powder spraying pipe 3, a feeding mechanism 4, and an adjusting mechanism 5. The conveyor frame 1 has multiple sets of conveying rollers 101 at its top. The mounting frame 2 is positioned above the conveyor frame and has a mounting cavity 201. The powder spraying pipe 3 is horizontally positioned within the mounting cavity 201, and its arrangement is perpendicular to the conveying direction of the conveyor frame 1. Multiple nozzles 301 are evenly distributed at the bottom of the powder spraying pipe 3. The feeding mechanism 4 is located on one side of the conveyor frame 1 and connected to one end of the powder spraying pipe 3. The feeding mechanism 4 is used to convey materials to the powder spraying pipe 3 and for the materials to be sprayed out by the nozzles 301. The adjusting mechanism 5 has a cylindrical adjusting plate 501, which slides along the axial direction of the powder spraying pipe 3 within the powder spraying pipe 3, and the sidewall of the adjusting plate 501 is sealed to the inner wall of the powder spraying pipe 3.

[0037] The beneficial effects of the width-adjustable powder spraying device provided in this embodiment are as follows: Compared with the prior art, the width-adjustable powder spraying device provided in this embodiment, by setting the adjustment plate 501 of the adjustment mechanism 5, when the adjustment plate 501 slides in the powder spraying tube 3, will change the length of the part communicating with the inner cavity of the powder spraying tube 3 and the feeding mechanism 4, thereby changing the number of nozzles 301 that can spray powder, so as to change the purpose of changing the powder spraying width. When spraying powder on coated glass with a small width, the powder spraying width of the width-adjustable powder spraying device of this utility model is reduced, thereby reducing the waste of powder material.

[0038] In this embodiment, the mounting frame 2 includes two vertical mounting plates 202 and a horizontal mounting plate 203. The vertical mounting plates 202 are respectively disposed on both sides of the conveyor frame 1, and the horizontal mounting plate 203 is connected to the top of the two vertical mounting plates 202. The gap between the two vertical mounting plates 202 is the mounting cavity 201. The two ends of the powder spraying pipe 3 are respectively disposed on the vertical mounting plates 202. The mounting frame 2 is configured in this way, which is simple in structure and convenient to use.

[0039] Specifically, the adjusting mechanism 5 includes a drive plate 502, a lead screw 503, a handle, and a connecting assembly 505. The lead screw 503 is rotatably mounted between two mounting vertical plates 202. The handle is located on the outside of the mounting vertical plates 202 and is connected to the lead screw 503. Shaking the handle can drive the lead screw 503 to rotate. The drive plate 502 is screwed onto the lead screw 503. The connecting assembly 505 connects the adjusting plate 501 and the adjusting plate 501. When the lead screw 503 rotates, it drives the drive plate to move, thereby causing the adjusting plate 501 to slide. At the same time, due to the setting of the connecting assembly 505, the drive plate 502 does not rotate with the rotation of the lead screw 503, but moves along the axial direction of the lead screw 503.

[0040] The connecting assembly 505 includes an adjusting hole 506, an adjusting rod 507, and a baffle 508. The adjusting hole 506 is located at the top of the powder spraying pipe 3. The adjusting rod 507 is inserted into the adjusting hole 506, and the front and rear sides of the adjusting rod 507 abut against the side wall of the adjusting hole 506. The bottom end of the adjusting rod 507 is connected to the adjusting plate 501, and the top end of the adjusting rod 507 is connected to the drive plate 502. The baffle 508 is shaped to conform to the powder spraying pipe 3 and covers the top of the powder spraying pipe 3. The baffle 508 is connected to the adjusting rod 507. The length of the baffle 508 is not less than the length of the adjusting hole 506. Along the sliding direction of the adjusting rod 507, the baffle 508 is located upstream of the adjusting rod 507, and the connection between the feeding mechanism 4 and the powder spraying pipe 3 is located upstream of the adjusting rod 507. The adjustment hole 506 is designed to provide clearance for the sliding of the adjustment rod 507. The baffle 508 is designed so that when the adjustment rod 507 slides, the baffle 508 can block the adjustment hole 506 upstream of the adjustment rod 507.

[0041] In addition, the powder spraying pipe 3 has sliding grooves 509 on both sides, and a slider 510 is provided at the bottom of the baffle 508. The slider 510 is inserted into the sliding groove 509. When the slider 510 is inserted into the sliding groove 509, the inner wall of the baffle 508 abuts against the outer wall of the powder spraying pipe 3. The sliding groove 509 facilitates the baffle 508 abutting against the powder spraying pipe 3.

[0042] In this embodiment, the conveyor frame 1 includes two vertical conveyor plates 102, a horizontal conveyor plate 103, multiple support legs 104, and multiple conveyor rollers 101. The vertical conveyor plates 102 are arranged vertically, the horizontal conveyor plate 103 is connected to the bottom of the two vertical conveyor plates 102, the conveyor rollers 101 are rotatably disposed between the vertical conveyor plates 102, and the support legs 104 are disposed at the bottom of the horizontal conveyor plate 103.

[0043] Preferably, the top of the conveying vertical plate 102 is provided with a limiting block 105, and the bottom of the mounting vertical plate 202 is provided with a limiting groove. The mounting vertical plate 202 corresponds one-to-one with the conveying vertical plate 102, and the limiting block 105 is inserted into the corresponding limiting groove. The setting of the limiting block 105 and the limiting groove makes the mounting frame 2 fixed to the conveying vertical plate 102.

[0044] In this embodiment, a discharge port 106 is provided on the vertical conveyor plate 102 on the right side of the horizontal conveyor plate 103, and a receiving hopper 107 is provided on the outer side of the vertical conveyor plate 102. A storage cylinder 108 is connected to the bottom of the receiving hopper 107. The top of the receiving hopper 107 is flush with the bottom of the discharge port 106. A guide plate 109 is provided on the top of the horizontal conveyor plate 103. The guide plate 109 is located below the conveyor roller 101. The width of the guide plate 109 in the horizontal direction is the same as the width of the horizontal conveyor plate 103. The guide plate 109 is arranged from low to high from the side closer to the discharge port 106 to the side farther away from the discharge port 106. When powder coating is applied to narrow-width coated glass, the mist-like powder material will not fall entirely onto the coated glass. The portion that does not fall onto the glass will eventually fall onto the guide plate 109. As it accumulates, it will slide to the right under the influence of gravity and eventually enter the receiving hopper 107 through the discharge port 106 and be stored in the storage cylinder 108.

[0045] In addition, sealing covers 6 are provided on both sides of the mounting frame 2. The sealing covers 6 are L-shaped, with the vertical part of the sealing cover 6 pressing against the mounting frame 2 and the horizontal part of the sealing cover 6 covering the top of the conveyor frame 1. The conveyor frame 1, the mounting frame 2, and the sealing covers 6 form a spraying chamber. The sealing covers 6 trap the atomized powder coating inside the spraying chamber, protecting the workshop environment and facilitating the recovery of some materials.

[0046] The horizontal portion of the sealing cover 6 has first limiting plates 601 on both sides, which are located on the outer side of the conveying vertical plate 102 and abut against it. The vertical portion of the sealing cover 6 has a second limiting plate 602 at one end. The second limiting plate 602 is n-shaped and overlaps the outer side of the mounting frame 2. The first and second limiting plates 601 and 602 ensure a more secure seal between the sealing cover 6, the conveying frame 1, and the mounting frame 2.

[0047] Finally, the feeding mechanism 4 includes a feeding cylinder, a feeding pump, and a conveying pipe. The feeding cylinder is located on one side of the conveying frame 1. The input end of the feeding pump is connected to the feeding cylinder, and the other end of the feeding pump is connected to the conveying pipe. The top end of the conveying pipe is connected to the left end of the powder spraying pipe 3. In addition, the feeding mechanism 4 may also include an electrostatic generator to make the powder material statically charged, so that the powder material can be adsorbed onto the coated glass.

[0048] In addition, the width-adjustable powder spraying device of this utility model also includes a control cabinet 7, which is electrically connected to the feed pump and the electrostatic generator to facilitate the control of the start and stop of the feed pump and the electrostatic generator.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A powder spraying device with adjustable width, characterized in that, include: The conveyor frame (1) is equipped with multiple sets of conveyor rollers (101) on the top. Mounting frame (2) is disposed above the conveyor frame, and mounting frame (2) is provided with mounting cavity (201). The powder spraying pipe (3) is horizontally arranged in the mounting cavity (201), and the powder spraying pipe (3) is arranged perpendicular to the conveying direction of the conveying frame (1). Multiple nozzles (301) are evenly arranged at the bottom of the powder spraying pipe (3). The feeding mechanism (4) is located on one side of the conveyor frame (1). The feeding mechanism (4) is connected to one end of the powder spraying pipe (3). The feeding mechanism (4) is used to feed the material to the powder spraying pipe (3) and spray it out by the nozzle (301). The adjustment mechanism (5) has a cylindrical adjustment plate (501) which is slidably disposed in the powder spraying pipe (3) along the axial direction of the powder spraying pipe (3), and the side wall of the adjustment plate (501) is sealed to the inner wall of the powder spraying pipe (3).

2. The width-adjustable powder spraying device as described in claim 1, characterized in that: The mounting frame (2) includes two mounting vertical plates (202) and a mounting horizontal plate (203). The mounting vertical plates (202) are respectively located on both sides of the conveyor frame (1). The mounting horizontal plate (203) is connected to the top of the two mounting vertical plates (202). The gap between the two mounting vertical plates (202) is the mounting cavity (201). The two ends of the powder spraying pipe (3) are respectively located on the mounting vertical plates (202).

3. The width-adjustable powder spraying device as described in claim 2, characterized in that: The adjustment mechanism (5) includes a drive plate (502), a lead screw (503), a handle, and a connecting assembly (505). The lead screw (503) is rotatably disposed between the two mounting vertical plates (202). The handle is disposed on the outside of the mounting vertical plate (202) and is connected to the lead screw (503). Shaking the handle can drive the lead screw (503) to rotate. The drive plate (502) is screwed onto the lead screw (503). The connecting assembly (505) is connected between the adjustment plate (501) and the adjustment plate (501).

4. The width-adjustable powder spraying device as described in claim 3, characterized in that: The connecting assembly (505) includes an adjusting hole (506), an adjusting rod (507), and a baffle (508). The adjusting hole (506) is located at the top of the powder spraying pipe (3). The adjusting rod (507) is inserted into the adjusting hole (506), and the front and rear sides of the adjusting rod (507) abut against the sidewalls of the adjusting hole (506). The bottom end of the adjusting rod (507) is connected to the adjusting plate (501), and the top end of the adjusting rod (507) is connected to the drive plate (502). The baffle (508) is shaped to conform to the powder spraying pipe (3) and covers the top of the powder spraying pipe (3). The baffle (508) is connected to the adjusting rod (507). The length of the baffle (508) is not less than the length of the adjusting hole (506). Along the sliding direction of the adjusting rod (507), the baffle (508) is located upstream of the adjusting rod (507), and the connection between the feeding mechanism (4) and the powder spraying pipe (3) is located upstream of the adjusting rod (507).

5. The width-adjustable powder spraying device as described in claim 4, characterized in that: The powder spraying pipe (3) has sliding grooves (509) on both sides, and the bottom end of the baffle (508) has a slider (510). The slider (510) is inserted into the sliding groove (509). When the slider (510) is inserted into the sliding groove (509), the inner wall of the baffle (508) abuts against the outer wall of the powder spraying pipe (3).

6. The width-adjustable powder spraying device as described in claim 5, characterized in that: The conveyor frame (1) includes two vertical conveyor plates (102), a horizontal conveyor plate (103), multiple support legs (104), and multiple conveyor rollers (101). The vertical conveyor plates (102) are arranged vertically, the horizontal conveyor plate (103) is connected to the bottom of the two vertical conveyor plates (102), the conveyor rollers (101) are rotatably disposed between the vertical conveyor plates (102), and the support legs (104) are disposed at the bottom of the horizontal conveyor plate (103).

7. The width-adjustable powder spraying device as described in claim 6, characterized in that: The top of the conveying vertical plate (102) is provided with a limiting block (105), and the bottom of the mounting vertical plate (202) is provided with a limiting groove. The mounting vertical plate (202) corresponds one-to-one with the conveying vertical plate (102), and the limiting block (105) is inserted into the corresponding limiting groove.

8. The width-adjustable powder spraying device as described in claim 7, characterized in that: The conveying vertical plate (102) is provided with a discharge port (106), and a receiving hopper (107) is provided on the outer side of the conveying vertical plate (102). A storage cylinder (108) is connected to the bottom of the receiving hopper (107). The top of the receiving hopper (107) is flush with the bottom of the discharge port (106). A guide plate (109) is provided on the top of the conveying horizontal plate (103). The guide plate (109) is located below the conveying roller (101). The width of the guide plate (109) in the horizontal direction is the same as the width of the conveying horizontal plate (103). The guide plate (109) is arranged from low to high from the side close to the discharge port (106) to the side away from the discharge port (106).

9. The width-adjustable powder spraying device as described in claim 8, characterized in that: The mounting frame (2) is provided with sealing covers (6) on both sides. The sealing covers (6) are L-shaped. The vertical part of the sealing cover (6) abuts against the mounting frame (2), and the horizontal part of the sealing cover (6) covers the top of the conveying frame (1). The conveying frame (1), the mounting frame (2) and the sealing cover (6) form a spraying chamber.

10. The width-adjustable powder spraying device as described in claim 9, characterized in that: The sealing cover (6) has a first limiting plate (601) on both sides of the horizontally arranged portion. The first limiting plate (601) is located on the outside of the conveying vertical plate (102) and abuts against the conveying vertical plate (102). The sealing cover (6) has a second limiting plate (602) at one end of the vertically arranged portion. The second limiting plate (602) is n-shaped and overlaps the outside of the mounting frame (2).