A powder spraying device with adjustable powder spraying uniformity

Abstract

This application discloses a powder spraying device with adjustable powder spraying uniformity. The device includes: an adjustable nozzle, comprising a housing, an adjusting member, and a sliding member. The nozzle is connected to the front wall of the housing. The sliding member is slidably connected to the inner wall of the housing and corresponding to the nozzle. A sliding groove is provided on the top wall of the housing. The adjusting member is slidably connected to the sliding groove, and the bottom of the adjusting member is connected to the sliding member. The adjusting member is used to adjust the distance between the end of the sliding member and the nozzle to control the powder spraying uniformity of the nozzle. A feeding pipe is connected to the top wall of the housing for conveying powder into the housing. The rear wall of the housing is also connected to a fan to drive the powder entering the housing through the distance between the end of the sliding member and the nozzle under wind power. Through the above method, the powder spraying device provided by this application can flexibly control the powder spraying uniformity, effectively meeting the diverse needs for powder spraying accuracy and uniformity in different scenarios, and improving the quality and efficiency of powder spraying operations.

Description

Technical Field

[0001] This application relates to the field of powder spraying device technology, and in particular to a powder spraying device with adjustable powder spraying uniformity. Background Technology

[0002] In the industrial production field, powder coating and material conveying operations are widely used. The uniformity of powder coating directly affects the quality of processed products, while the cleanliness of the inner wall of the feeding tank is related to the efficiency and purity of material conveying. Both play a key role in improving production efficiency and product quality.

[0003] Currently, powder spraying devices on the market are difficult to precisely adjust the nozzle diameter, resulting in poor powder spraying uniformity. This fails to meet the diverse needs of different production scenarios and affects product processing quality. At the same time, during material transportation, the inner wall of the feeding tank is prone to static electricity adsorbing raw materials. Existing cleaning methods are inefficient and cannot completely remove residual raw materials, which not only wastes raw materials but also contaminates the inside of the feeding tank, affecting subsequent material transportation. Improvements and optimizations are urgently needed. Utility Model Content

[0004] This application mainly provides a powder spraying device with adjustable powder spraying uniformity to solve the problem of poor adjustability of powder spraying uniformity in powder spraying devices.

[0005] To solve the above-mentioned technical problems, this application adopts a technical solution as follows: providing a powder spraying device with adjustable powder spraying uniformity. The powder spraying device includes: an adjustable nozzle, comprising a housing, an adjusting member, and a sliding member; a nozzle is connected to the front wall of the housing; the sliding member is slidably connected to the inner wall of the housing and is disposed corresponding to the nozzle; a sliding groove is provided on the top wall of the housing; the adjusting member is slidably connected to the sliding groove; and the bottom of the adjusting member is connected to the sliding member. The adjusting member is used to adjust the distance between the end of the sliding member and the nozzle to control the powder spraying uniformity of the nozzle; a feeding pipe is connected to the top wall of the housing for conveying powder into the housing; wherein, the rear wall of the housing is also used to connect a fan to drive the powder entering the housing through the distance between the end of the sliding member and the nozzle under wind power.

[0006] In some embodiments, the slider includes a sliding rod and a stop connected to one end of the sliding rod. The sliding rod is slidably connected to the inner wall of the housing. The outer surface of the stop and the inner surface of the nozzle have the same shape. The distance between the outer surface of the stop and the inner surface of the nozzle varies with the position of the sliding rod.

[0007] In some embodiments, the inner surface of the nozzle and the outer surface of the stop are both tapered surfaces.

[0008] In some embodiments, the adjusting member includes a pressing rod and a sliding baffle sleeved on the pressing rod, the sliding baffle being slidably fitted in the sliding groove and covering the opening of the sliding groove.

[0009] In some embodiments, the inner side of the top wall of the housing is further provided with a plurality of slots distributed along the sliding groove;

[0010] The adjusting component further includes a locking block that connects to the pressing rod. The bottom of the adjusting component is elastically connected to the sliding component. Under the action of elastic force, the locking block engages with one of the plurality of locking slots.

[0011] Specifically, by pressing the pressing rod, the locking relationship between the locking block and the locking groove is released, thereby allowing the pressing rod to slide along the sliding groove.

[0012] In some embodiments, a sliding sleeve is connected to the slider, the pressing rod is slidably engaged with the sliding sleeve, and a spring is supported between the bottom of the pressing rod and the sliding sleeve.

[0013] In some embodiments, the powder spraying device further includes:

[0014] A feeding tank includes a tank body and a scraper rotatably connected to the tank body, the scraper being used to scrape powder adhering to the inner wall of the tank body;

[0015] A hopper for transferring powder materials, the bottom of which is connected to the feeding pipe;

[0016] An auger is located below the feed tank and is also connected to the hopper, used to convey the powder output from the feed tank to the hopper.

[0017] In some embodiments, an installation cavity is provided on the inner side of the top wall of the tank;

[0018] The scraping component includes a pressing shaft, a rotating column, and a scraper. The pressing shaft is movably mounted on the mounting cavity. The rotating column is sleeved on the pressing shaft and its top end is rotatably connected to the mounting cavity. The outer wall of the pressing shaft is provided with a ball, and the inner wall of the rotating column is provided with a threaded structure. The ball engages with the threaded structure on the inner wall of the rotating column. The scraper is connected to the outer side of the rotating column.

[0019] The pressing shaft is pressed to drive the rotating column to rotate, so that the scraper cleans the powder adsorbed on the inner wall of the tank.

[0020] In some embodiments, the scraper further includes a compression spring sleeved on the pressing shaft, the compression spring also being elastically supported between the shoulder of the pressing shaft and the baffle of the mounting cavity.

[0021] In some embodiments, the top end of the rotating column is provided with an outer flange, the outer flange is rotatably supported on the bottom of the mounting cavity, and a ball bearing is provided between the outer flange and the bottom of the mounting cavity.

[0022] The beneficial effects of this application are as follows: Unlike existing technologies, this application discloses a powder spraying device with adjustable powder spraying uniformity. It has the following beneficial effects:

[0023] When in use, this device allows for precise adjustment of the nozzle diameter by adjusting the distance between the stop and the nozzle, thereby flexibly controlling the uniformity of powder spraying. This effectively meets the diverse needs for powder spraying accuracy and uniformity in different scenarios, improving the quality and efficiency of powder spraying operations.

[0024] When in use, this device moves the pressing shaft downwards, causing the screw ball to move along the thread on the rotating column, generating a tangential force that drives the rotating column to rotate. This, in turn, drives the scraper to scrape off the powder adsorbed on the inner wall, effectively cleaning the powder adsorbed by electrostatic charge on the inner wall of the feeding tank, avoiding waste caused by powder residue and contamination of the inside of the feeding tank. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0026] Figure 1 This is a schematic diagram of the structure of a powder spraying device proposed in this application;

[0027] Figure 2 For example Figure 1 A cross-sectional view of the feed tank in the powder spraying device shown.

[0028] Figure 3 For example Figure 1 A schematic cross-sectional view of the adjustable nozzle in the powder spraying device shown.

[0029] Figure 4 For example Figure 1 The diagram shows the exploded structure of the adjustable nozzle in the powder spraying device. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0033] This application provides a powder spraying device 100 with adjustable powder spraying uniformity, see reference. Figure 1 , Figure 1 This is a schematic diagram of an embodiment of the powder spraying device provided in this application.

[0034] The powder spraying device 100 includes a base 01, a feeding tank 10, an auger 20, a hopper 30, a feeding pipe 40, and an adjustable nozzle 50. A support frame 02 is fixedly connected to the base 01. The feeding tank 10 is installed on the support frame 02. The auger 20 is installed on the base 01 and located below the feeding tank 10. The feeding port of the feeding tank 10 discharges material into the auger 20. The auger 20 is also connected to the hopper 30. The auger 20 is used to transport the powder output from the feeding tank 10 to the hopper 30. The hopper 30 is used to transfer powder. The bottom of the hopper 30 is connected to the feeding pipe 40. The hopper 30 is connected to the adjustable nozzle 50 through the feeding pipe 40 to transport the powder to the adjustable nozzle 50.

[0035] See also Figure 1 and Figure 2,in Figure 2 For example Figure 1 A cross-sectional view of the feed tank in the powder spraying device shown.

[0036] The feeding tank 10 includes a tank body 12 and a scraper 14 rotatably connected to the tank body 12. The tank body 12 is used to hold powder, and the scraper 14 is used to scrape the powder adhering to the inner wall of the tank body 12.

[0037] The bottom of the tank 12 is a conical end, and a discharge port is provided at the bottom of the conical end. The discharge port is set in accordance with the auger 20. A valve is provided at the discharge port, which can control the flow rate of powder to ensure that the powder falls evenly.

[0038] In operation, the valve is opened, and the powder in the feed tank 10 falls into the auger 20 under gravity. The drive motor on the side of the auger 20 is started, and the auger 20 begins to operate, breaking up the powder and conveying it to the front hopper 30. The broken powder enters the feed pipe 40 from the hopper 30 and enters the adjustable nozzle 50 under gravity. The rear end of the adjustable nozzle 50 is connected to a conduit, and the other end of the conduit is connected to a fan. The fan provides conveying power to the raw material inside the casing 8. Starting the fan allows the raw material to be sprayed out from the adjustable nozzle 50.

[0039] Optionally, the scraper 14 can be driven by a motor to rotate, ensuring that the powder on the inner wall of the tank 12 is effectively scraped off, thereby avoiding powder accumulation.

[0040] In this embodiment, the scraper 14 is manually driven to perform scraping operations without the need for an additional power device. It is easy to operate, low in cost, and can meet the low-frequency scraping needs of the feed tank 10.

[0041] Specifically, the inner side of the top wall of the tank 12 is provided with an installation cavity 120; the scraper 14 includes a pressing shaft 141, a rotating column 142 and a scraper 143. The pressing shaft 141 is movably mounted on the installation cavity 120. The rotating column 142 is sleeved on the pressing shaft 141 and its top end is rotatably connected to the installation cavity 120. The outer wall of the pressing shaft 141 is provided with a screw ball 144, and the inner wall of the rotating column 142 is provided with a threaded structure. The screw ball 144 cooperates with the threaded structure of the inner wall of the rotating column 142. The scraper 143 is connected to the outer side of the rotating column 142. The pressing shaft 141 is pressed and drives the rotating column 142 to rotate, so that the scraper 143 cleans the powder adsorbed on the inner wall of the tank 12 and ensures that the powder falls smoothly.

[0042] The user manually presses the pressing shaft 141, causing it to move downwards. This causes the ball bearing 144 on the outside of the pressing shaft 141 to form a helical drive with the threaded structure on the inner wall of the rotating column 142. When the ball bearing 144 moves along the threaded structure of the rotating column 142, it generates a tangential force. This tangential force provides a rotational driving torque for the rotating column 142, causing it to rotate. This, in turn, drives the scraper 143 on the outside to clean the powder adsorbed on the inner wall of the tank 12.

[0043] The number of screw balls 144 is multiple, and they are distributed according to the thread structure on the inner wall of the rotating column 142 to increase drive stability and reliability.

[0044] Optionally, after pressing, the user applies a pulling force to the pressing shaft 141, causing the pressing shaft 141 to move upward, which in turn drives the rotating column 142 to rotate in the opposite direction by the screw ball 144, thereby driving the outer scraper 143 to clean the powder adsorbed on the inner wall of the tank 12 in the opposite direction.

[0045] In this embodiment, the scraper 14 also includes a compression spring 145 sleeved on the pressing shaft 141, and the compression spring 145 is also elastically supported between the shoulder of the pressing shaft 141 and the baffle of the mounting cavity 120.

[0046] The spring 145 provides elastic restoring force when the pressing shaft 141 moves up and down, so that after the user finishes pressing, the pressing shaft 141 automatically resets under the action of the spring 145, ensuring that the scraper 14 is always in a ready-to-work state, improving operating efficiency and convenience.

[0047] Furthermore, the top of the rotating column 142 is provided with an outer flange 146, which is rotatably supported on the bottom of the mounting cavity 120. A ball bearing 147 is provided between the outer flange 146 and the bottom of the mounting cavity 120. Multiple balls bearings 147 are rotatably supported between the outer flange 146 and the bottom of the mounting cavity 120, reducing the friction during the rotation of the rotating column 142 and ensuring that it can achieve smooth and stable rotational movement under the action of driving force.

[0048] At least two scrapers 143 are evenly distributed around the rotating column 142, and the rotating column 142 and the scrapers 143 are connected by a connecting rod. The scrapers 143 may be equipped with flexible devices that conform to the inner wall of the tank 12, ensuring that the scrapers 143 can effectively clean powder at different positions. By driving the scrapers 143 to rotate, the powder accumulated on the inner wall of the tank 12 due to electrostatic adsorption can be effectively removed by mechanical scraping.

[0049] See also Figure 1 , Figure 3 and Figure 4 ,in Figure 3 For example Figure 1A schematic cross-sectional view of the adjustable nozzle in the powder spraying device shown. Figure 4 For example Figure 1 The diagram shows the exploded structure of the adjustable nozzle in the powder spraying device.

[0050] In this embodiment, the adjustable nozzle 50 includes a housing 51, an adjusting member 52, and a sliding member 53. The front wall of the housing 51 is connected to a nozzle 510. The sliding member 53 is slidably connected to the inner wall of the housing 51 and is provided corresponding to the nozzle 510. The top wall of the housing 51 is provided with a sliding groove 512. The adjusting member 52 is slidably connected to the sliding groove 512, and the bottom of the adjusting member 52 is connected to the sliding member 53. The adjusting member 52 is used to adjust the distance between the end of the sliding member 53 and the nozzle 510 to control the uniformity of powder spraying of the nozzle 510.

[0051] The feeding pipe 40 is connected to the top wall of the housing 51 for conveying powder into the housing 51; the rear wall of the housing 51 is also used to connect a fan (not shown) to drive the powder entering the housing 51 through the gap between the end of the sliding member 53 and the nozzle 510 under the drive of the wind.

[0052] Specifically, the user can drive the adjusting member 52 to slide along the sliding groove 512, and the adjusting member 52 drives the sliding member 53 to move, thereby adjusting the distance between the end of the sliding member 53 and the nozzle 510 to adjust the uniformity of powder spraying.

[0053] The sliding member 53 includes a sliding rod 530 and a stop 532 connected to one end of the sliding rod 530. The sliding rod 530 is slidably connected to the inner wall of the housing 51. The outer surface of the stop 532 and the inner surface of the nozzle 510 have the same shape. The distance between the outer surface of the stop 532 and the inner surface of the nozzle 510 varies with the position of the sliding rod 530.

[0054] The outer casing 51 has grooves on its two opposite inner walls. The sliding rod 530 slides in the grooves on the inner walls to ensure that the sliding rod 530 is stable and reliable during movement and to avoid affecting the powder spraying effect due to shaking.

[0055] The nozzle 510 has a shell-like structure and a nozzle orifice. It can be a conical or hemispherical nozzle, etc. The corresponding stop 532 can also be a conical or hemispherical structure, so that the stop 532 can extend into the nozzle 510 as the sliding rod 530 moves, so as to adjust the distance between the outer surface of the stop 532 and the inner surface of the nozzle 510. The outer surface of the stop 532 and the inner surface of the nozzle 510 define a powder spraying channel that connects to the nozzle orifice. By adjusting the position of the stop 532, the cross-sectional area of ​​the powder spraying channel can be changed, thereby precisely controlling the amount and distribution of powder spraying and realizing the adjustment of the powder spraying uniformity.

[0056] In this embodiment, the inner surface of the nozzle 510 and the outer surface of the baffle 532 are both conical surfaces. The conical surfaces can effectively guide the powder, ensuring that the powder forms a stable flow when it is sprayed out, reducing the accumulation and clogging of powder at the nozzle orifice, and further improving the uniformity of powder spraying.

[0057] The adjusting component 52 includes a pressing rod 520 and a sliding baffle 522 sleeved on the pressing rod 520. The sliding baffle 522 is slidably assembled in the sliding groove 512 and covers the opening of the sliding groove 512 to prevent powder from leaking out from the opening of the sliding groove 512.

[0058] The opening of the sliding groove 512 can limit the movement range of the pressing rod 520, that is, limit the movement range of the sliding member 53; the sliding baffle 522 moves in the sliding groove 512, and the length of the sliding baffle 522 is greater than the opening of the sliding groove 512, that is, the effective length of the sliding groove 512 is greater than the length of its opening, so that the sliding baffle 522 can always cover the opening when it slides in the sliding groove 512, effectively preventing powder leakage.

[0059] Optionally, the user can directly drive the pressing rod 520 to move the sliding member 53, and when the driving stops, the weight of the adjusting member 52 and the sliding member 53 will maintain the adjusted position.

[0060] In this embodiment, the pressing rod 520 and the sliding baffle 522 are fitted together to allow the pressing rod 520 to move under pressure. Further, the inner side of the top wall of the housing 51 is provided with a plurality of slots 514 distributed along the sliding groove 512; the adjusting member 52 also includes a locking block 524 connecting the pressing rod 520, and the bottom of the adjusting member 52 is elastically connected to the sliding member 53. Under the action of elastic force, the locking block 524 engages with one of the plurality of slots 514; by pressing the pressing rod 520, the engagement relationship between the locking block 524 and the slot 514 is released, thereby allowing the pressing rod 520 to slide along the sliding groove 512.

[0061] In other words, after the adjusting member 52 adjusts the position of the sliding member 53, it engages with the slot 514 on the outer casing 51 through the locking block 524 on it, ensuring that the adjusted position is stable and preventing the sliding member 53 from moving accidentally during operation.

[0062] By pressing the pressing rod 520, the locking relationship between the locking block 524 and the locking groove 514 can be released, thereby allowing the pressing rod 520 to slide along the sliding groove 512 with the cooperation of the sliding baffle 522, thereby adjusting the position of the sliding member 53.

[0063] Furthermore, a sliding sleeve 534 is connected to the sliding member 53, the pressing rod 520 is slidably engaged with the sliding sleeve 534, and a spring 536 is supported between the bottom of the pressing rod 520 and the sliding sleeve 534.

[0064] Spring 536 provides elastic force and allows pressing rod 520 to slide up and down relative to sliding sleeve 534; after pressing rod 520 has completed adjustment, spring 536 returns to its original shape, causing locking block 524 to re-engage with corresponding slot 514, ensuring stable adjustment position and preventing sliding member 53 from moving accidentally during operation.

[0065] In use, pressing the pressing rod 520 causes it to move downwards, compressing the spring 536. Simultaneously, the locking block 524 disengages from the slot 514 as the pressing rod 520 moves downwards, allowing the pressing rod 520 to be adjusted in position using the sliding fit between the sliding baffle 522 and the sliding groove 512. Applying force to the pressing rod 520 causes it to slide along the sliding groove 512, where the sliding baffle 522 moves within the groove and always covers the opening of the groove, achieving a complete seal. At the same time, the pressing rod 520 drives the sliding rod 530 to slide synchronously, thus adjusting the distance between the stop block 532 and the nozzle 510. After the stop block 532 moves to the predetermined position, the pressing rod 520 is released, the spring 536 returns to its original deformation, and the locking block 524 re-engages into the slot 514 to lock the sliding member 53. By adjusting the distance between the stop block 532 and the nozzle 510, the opening size of the nozzle 510 can be controlled, thereby adjusting the uniformity of powder spraying.

[0066] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A powder spraying device with adjustable powder spraying uniformity, characterized in that, include: An adjustable nozzle includes a housing, an adjusting member, and a sliding member. The front wall of the housing is connected to a nozzle. The sliding member is slidably connected to the inner wall of the housing and is provided corresponding to the nozzle. The top wall of the housing is provided with a sliding groove. The adjusting member is slidably connected to the sliding groove, and the bottom of the adjusting member is connected to the sliding member. The adjusting member is used to adjust the distance between the end of the sliding member and the nozzle to control the uniformity of powder spraying from the nozzle. A feeding pipe, connected to the top wall of the outer casing, is used to convey powder into the outer casing; The rear wall of the housing is also used to connect a fan, so that the powder entering the housing is driven by the wind to enter the nozzle through the gap between the end of the sliding member and the nozzle.

2. The powder spraying device with adjustable powder spraying uniformity according to claim 1, characterized in that, The sliding element includes a sliding rod and a stop connected to one end of the sliding rod. The sliding rod is slidably connected to the inner wall of the housing. The outer surface of the stop and the inner surface of the nozzle have the same shape. The distance between the outer surface of the stop and the inner surface of the nozzle varies with the position of the sliding rod.

3. The powder spraying device with adjustable powder spraying uniformity according to claim 2, characterized in that, The inner surface of the nozzle and the outer surface of the stop are both conical surfaces.

4. The powder spraying device with adjustable powder spraying uniformity according to claim 1, characterized in that, The adjusting component includes a pressing rod and a sliding baffle sleeved on the pressing rod. The sliding baffle is slidably assembled in the sliding groove and covers the opening of the sliding groove.

5. The powder spraying device with adjustable powder spraying uniformity according to claim 4, characterized in that, The inner side of the top wall of the outer casing is also provided with a plurality of slots distributed along the sliding groove; The adjusting component further includes a locking block that connects to the pressing rod. The bottom of the adjusting component is elastically connected to the sliding component. Under the action of elastic force, the locking block engages with one of the plurality of locking slots. Specifically, by pressing the pressing rod, the locking relationship between the locking block and the locking groove is released, thereby allowing the pressing rod to slide along the sliding groove.

6. The powder spraying device with adjustable powder spraying uniformity according to claim 5, characterized in that, A sliding sleeve is connected to the sliding member, the pressing rod slides in cooperation with the sliding sleeve, and a spring supports the bottom of the pressing rod and the sliding sleeve.

7. The powder spraying device with adjustable powder spraying uniformity according to claim 1, characterized in that, The powder spraying device also includes: A feeding tank includes a tank body and a scraper rotatably connected to the tank body, the scraper being used to scrape powder adhering to the inner wall of the tank body; A hopper for transferring powder materials, the bottom of which is connected to the feeding pipe; An auger is located below the feed tank and is also connected to the hopper, used to convey the powder output from the feed tank to the hopper.

8. The powder spraying device with adjustable powder spraying uniformity according to claim 7, characterized in that, The inner side of the top wall of the tank is provided with an installation cavity; The scraping component includes a pressing shaft, a rotating column, and a scraper. The pressing shaft is movably mounted on the mounting cavity. The rotating column is sleeved on the pressing shaft and its top end is rotatably connected to the mounting cavity. The outer wall of the pressing shaft is provided with a ball, and the inner wall of the rotating column is provided with a threaded structure. The ball engages with the threaded structure on the inner wall of the rotating column. The scraper is connected to the outer side of the rotating column. The pressing shaft is pressed to drive the rotating column to rotate, so that the scraper cleans the powder adsorbed on the inner wall of the tank.

9. The powder spraying device with adjustable powder spraying uniformity according to claim 8, characterized in that, The scraper also includes a compression spring sleeved on the pressing shaft, and the compression spring is elastically supported between the shoulder of the pressing shaft and the baffle of the mounting cavity.

10. The powder spraying device with adjustable powder spraying uniformity according to claim 8, characterized in that, The top of the rotating column is provided with an outer flange, which is rotatably supported on the bottom of the mounting cavity, and a ball bearing is provided between the outer flange and the bottom of the mounting cavity.

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