Preventing wet powder from clogging the feed inlet

Abstract

This invention relates to a method for preventing wet powder from clogging the feed inlet. The feed inlet includes a horizontal conveying mechanism located at the bottom of a powder-shaking box, a transfer box located at one end of the horizontal conveying mechanism, and a vertical auger inserted vertically into the transfer box. The horizontal conveying mechanism is a horizontal auger. The horizontal auger is inserted into the side of the transfer box. The vertical auger passes through the top of the transfer box and rotates with the bottom of the transfer box. A ramp is provided between the end of the horizontal auger and the bottom of the vertical auger. A vertical sleeve is fitted over the vertical auger. The lower end of the vertical sleeve connects to the bottom of the transfer box, and a powder inlet is provided on the side facing the ramp. The upper end of the powder inlet is a slanted cut. This invention utilizes the slanted cut to change the powder mass distribution at the powder inlet, preventing the sequentially stacked powder from completely clogging the powder inlet and ensuring the powder circulation process.

Description

Technical Field

[0001] This invention relates to the technical field of powder shaking machines, and in particular to a method for preventing wet powder from clogging the feed inlet. Background Technology

[0002] A common powder-discharging device consists of a horizontal conveyor mechanism at the bottom of the powder-discharging box to collect and aggregate the powder that has been shaken off. A vertical auger at the output end of this horizontal conveyor lifts the powder vertically to a powder distribution box above the powder-discharging box. This distribution box contains a powder distribution mechanism that evenly distributes the vertically lifted powder into the powder-discharging box. The invention patent application CN115570897A describes such a powder-discharging process. However, in actual circulation, the powder inlet at the lower end of the vertical auger is easily clogged by powder, preventing the circulation process from continuing. This is because the PET film is powder-discharging after ink printing. The ink contains moisture; inside the powder-discharging box, the powder easily becomes damp due to the moisture in the ink. Damp powder clumps together, reducing its flowability. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems and provide a method to prevent wet powder from clogging the feed inlet.

[0004] The technical solution of this invention is: a method for preventing wet powder from clogging the feed inlet, comprising a horizontal conveying mechanism disposed at the bottom of a powder-shaking box, a transfer box disposed at one end of the horizontal conveying mechanism, and a vertical auger inserted vertically into the transfer box; the horizontal conveying mechanism is a horizontal auger; the horizontal auger is inserted into the side of the transfer box to convey the powder into the transfer box; the vertical auger passes through the top of the transfer box and rotates with the bottom of the transfer box; the bottom end of the vertical auger is lower than the horizontal auger; a ramp is provided between the end of the horizontal auger and the bottom end of the vertical auger; the powder enters the transfer box. Under the centrifugal force of the horizontal auger, the powder is thrown along the ramp towards the bottom of the vertical auger. A vertical sleeve is fitted around the vertical auger; the lower end of the vertical sleeve connects to the bottom of the transfer box, and a powder inlet is located on the side facing the ramp. The vertical sleeve works in conjunction with the vertical auger to vertically lift the powder entering the inlet; the upper end of the inlet is obliquely cut. Due to varying degrees of moisture absorption, the powder exhibits uneven weight distribution; the more heavily moistened powder is heavier than the less moistened powder. Therefore, under the centrifugal force of the horizontal auger, the powder... Heavier powder reaches the bottom of the vertical auger before lighter powder; some of this first powder is blocked by the vertical sleeve and remains outside the sleeve, while the rest enters the sleeve and is lifted by the auger; subsequently, the lighter powder remains in front of the inlet; as powder continues to enter, the powder in front of the inlet gradually accumulates and blocks the inlet; when the powder accumulates to the oblique cut, the heavier powder will overlap the lighter powder along the oblique cut; when the heavier powder... When the less damp powder is stacked to a certain extent, the more damp powder will squeeze the less damp powder towards the powder inlet. Eventually, with the vibration brought by the operation of the vertical auger, the less damp powder collapses and enters the powder inlet along with the more damp powder. During this process, a small amount of powder still enters the powder inlet. As the vertical auger rotates, this powder is thrown out at various heights in the vertical direction of the powder inlet due to centrifugal force, impacting the powder stack and further disrupting the stability of the powder stack.

[0005] Preferably, the end of the horizontal auger facing away from the transfer box is provided with a horizontal motor, a horizontal drive wheel, a horizontal driven wheel, and a transmission belt; the output end of the horizontal motor is coaxially fixed to the horizontal drive wheel; the horizontal driven wheel is coaxially fixed to the horizontal auger; the horizontal drive wheel and the horizontal driven wheel are connected by the transmission belt.

[0006] Preferably, the transfer box is equipped with a horizontal U-shaped frame; the end of the horizontal auger is rotatably engaged with the closed end of the U-shaped frame; a scraper is installed at the end of the horizontal auger; the scraper is positioned above the ramp; the scraper can improve the ability of the powder to leave the horizontal auger, making the powder more impactful.

[0007] Furthermore, there are two scrapers, namely scraper A and scraper B; both scraper A and scraper B have a bent section at the middle of their ends; the bent section has two obtuse-angle bends and a right-angle bend located between the two obtuse-angle bends; the bent sections of scraper A and scraper B are respectively provided with mounting holes A and B; the outer surface of the mounting hole of scraper B is provided with a mounting nut; the end of the horizontal auger is provided with a radial hole and a mounting screw; the mounting screw passes through mounting hole A, the radial hole, and mounting hole B in sequence, and is threadedly engaged with the mounting nut; scraper A and scraper B are detachably connected and can be replaced when the scraper is severely worn.

[0008] Preferably, the upper end of the vertical auger is provided with a vertical motor, a vertical drive wheel, a vertical driven wheel, and a transmission belt B; the output end of the vertical motor is coaxially fixed to the vertical drive wheel; the vertical driven wheel is coaxially fixed to the vertical auger; the vertical drive wheel and the vertical driven wheel are connected by the transmission belt B.

[0009] Preferably, the transfer box has a side cover on the outside; the corresponding transfer box has an inspection port, which can be used for corresponding maintenance inside the transfer box.

[0010] Furthermore, the side cover is made of transparent material, allowing a direct view of the operation inside the transport box.

[0011] Preferably, the powder inlet is angled towards the ramp, making the powder weight distribution at the inlet more uneven, which facilitates the powder entering.

[0012] The beneficial effects of this invention are: the invention prevents wet powder from clogging the feed inlet, and has the following advantages:

[0013] (1) The powder inlet of the present invention is provided with a slanted cut at the upper end, which can change the powder mass layout at the powder inlet, so that the powder stacked in sequence cannot completely block the powder inlet, thus ensuring the powder circulation process;

[0014] (2) The scraper of the present invention can improve the ability of powder to leave the horizontal auger, making the powder more impactful and more likely to cause the collapse of powder with less moisture. Attached Figure Description

[0015] Figure 1 This is a three-dimensional diagram illustrating the working principle of the present invention to prevent wet powder from clogging the feed inlet;

[0016] Figure 2 This is a three-dimensional diagram illustrating the working principle of the present invention after removing the side cover of the feed inlet to prevent moisture powder blockage.

[0017] Figure 3 yes Figure 2 A magnified view of the I-shaped image;

[0018] Figure 4 yes Figure 1 A partial sectional view from the side;

[0019] Figure 5 yes Figure 4 AA section view;

[0020] Figure 6 yes Figure 5 II magnified view;

[0021] Figure 7 yes Figure 6 BB section view;

[0022] Figure 8 It is the state of the implementation process of existing technology. Figure 1 ;

[0023] Figure 9 It is the state of the implementation process of existing technology. Figure 2 ;

[0024] Figure 10 It is the current state of the implementation process of existing technologies. Figure 3 ;

[0025] Figure 8 In the middle, the upper left corner of the feed inlet at the lower end of the vertical auger is not completely closed, and powder can still be lifted by the vertical auger;

[0026] Figure 9 In the middle, the amount of powder piled up at the front end of the vertical auger is increasing, and the gap at the upper left corner of the feed inlet at the lower end of the vertical auger is getting smaller and smaller;

[0027] Figure 10 In the middle, there is more powder piled up at the front end of the vertical auger, and the feed inlet at the lower end of the vertical auger is completely blocked.

[0028] In the diagram: 1. Horizontal auger, 111. Horizontal motor, 112. Horizontal drive wheel, 113. Horizontal driven wheel, 114. Transmission belt A, 121. Scraper A, 1211. Mounting hole A, 122. Scraper B, 1221. Mounting hole B, 1222. Mounting nut, 123. Bending section, 1231. Obtuse angle bend, 1232. Right angle bend, 123. Radial hole, 124. Mounting screw, 2. Transfer box, 21. Ramp, 22. U-shaped frame, 23. Side cover, 3. Vertical auger, 31. Vertical sleeve, 311. Powder inlet, 3111. Angled cut, 32. Vertical motor, 33. Vertical drive wheel, 34. Vertical driven wheel, 35. Transmission belt B. Detailed Implementation

[0029] Example 1: See Figure 1-7A method for preventing wet powder from clogging the feed inlet includes a horizontal conveying mechanism located at the bottom of a powder-shaking box, a transfer box 2 located at one end of the horizontal conveying mechanism, and a vertical auger 3 vertically inserted into the transfer box 2. The horizontal conveying mechanism is a horizontal auger 1. The horizontal auger 1 is inserted into the side of the transfer box 2 to convey powder into the transfer box 2. The vertical auger 3 penetrates the top of the transfer box 2 and rotates with the bottom of the transfer box 2. The bottom end of the vertical auger 3 is lower than that of the horizontal auger 1. A ramp 21 is provided between the end of the horizontal auger 1 and the bottom end of the vertical auger 3. The powder entering the transfer box 2 is conveyed by the horizontal auger 1... Under the centrifugal force, the powder is thrown along the ramp 21 towards the bottom of the vertical auger; the vertical auger 3 is fitted with a vertical sleeve 31; the lower end of the vertical sleeve 31 is connected to the bottom of the transfer box 2, and a powder inlet 311 is provided on the side facing the ramp 21; the vertical sleeve 31 cooperates with the vertical auger 3 to vertically lift the powder entering the powder inlet 311; the upper end of the powder inlet 311 is a slanted cut 3111; the powder has uneven quality due to different degrees of moisture absorption; the powder with more moisture absorption is heavier than the powder with less moisture absorption; therefore, under the centrifugal force of the horizontal auger 1, the powder with more moisture absorption is heavier. Heavier powder arrives below the vertical auger 3 before the lighter, more damp powder. Part of this initial arrival is blocked by the vertical sleeve 31 and remains outside the sleeve, while the rest enters the sleeve and is lifted by the auger 3. The lighter powder then remains in front of the inlet 311. As powder continues to enter, it gradually accumulates and blocks the inlet 311. When the powder accumulates to the oblique cut 3111, the heavier, more damp powder is stacked on top of the lighter powder along the oblique cut 3111. When the powder is stacked on top of the less damp powder to a certain extent, the more damp powder will squeeze the less damp powder towards the powder inlet 311. Finally, with the vibration brought by the operation of the vertical auger 3, the less damp powder collapses and enters the powder inlet 311 along with the more damp powder. During this process, a small amount of powder still enters the powder inlet 311. As the vertical auger 3 rotates, this powder is thrown out at various heights in the vertical direction of the powder inlet 311 due to the centrifugal force, impacting the powder stack and helping to disrupt the stability of the powder stack.

[0030] Compared with the prior art, the present invention can change the powder mass layout at the powder inlet 311 by setting a slanted cut 3111 at the upper end of the powder inlet 311, so that the powder stacked in sequence cannot completely block the powder inlet 311, thus ensuring the powder circulation process.

[0031] The horizontal auger 1 is equipped with a horizontal motor 111, a horizontal drive wheel 112, a horizontal driven wheel 113, and a transmission belt A 114 at the end facing away from the transfer box 2. The output end of the horizontal motor 111 is coaxially fixed to the horizontal drive wheel 112. The horizontal driven wheel 113 is coaxially fixed to the horizontal auger 1. The horizontal drive wheel 112 and the horizontal driven wheel 113 are connected by the transmission belt A 114.

[0032] The transfer box 2 is equipped with a horizontal U-shaped frame 22; the end of the horizontal auger 1 is rotatably engaged with the closed end of the U-shaped frame 22; a scraper is installed at the end of the horizontal auger 1; the scraper is positioned above the ramp 21. The scraper can improve the ability of the powder to leave the horizontal auger 1, making the powder more impactful and more likely to cause the collapse of the lightly moistened powder.

[0033] There are two scrapers, scraper A 121 and scraper B 122. Both scraper A 121 and scraper B 122 have a bent section 123 at the middle of their ends. The bent section 123 has two obtuse-angle bends 1231 and a right-angle bend 1232 located between the two obtuse-angle bends 1231. The bent sections 123 of scraper A 121 and scraper B 122 are respectively provided with mounting holes A 1211 and B 1221. A mounting nut 1222 is provided on the outer surface of the mounting hole of scraper B 122. The end of the horizontal auger 1 has a radial hole 123 and a mounting screw 124. The mounting screw 124 passes sequentially through mounting hole A 1211, radial hole 123, and mounting hole B 1221, and is threaded into the mounting nut 1222. Scraper A 121 and scraper B 122 are detachably connected and can be replaced when the scrapers are severely worn.

[0034] The upper end of the vertical auger 3 is equipped with a vertical motor 32, a vertical drive wheel 33, a vertical driven wheel 34, and a transmission belt B 35; the output end of the vertical motor 32 is coaxially fixed to the vertical drive wheel 33; the vertical driven wheel 34 is coaxially fixed to the vertical auger 3; the vertical drive wheel 33 and the vertical driven wheel 34 are connected by the transmission belt B 35.

[0035] The transfer box 2 has a side cover 23 on its outer side. The transfer box 2 is equipped with an inspection port, which allows for the inspection and maintenance of the interior of the transfer box 2.

[0036] The side cover 23 is made of transparent material, allowing a clear view of the operation inside the transport box 2.

[0037] The working principle of this embodiment is as follows: The powder exhibits uneven weight due to varying degrees of moisture absorption; the more heavily moistened powder is heavier than the less moistened powder. Therefore, under the centrifugal force of the horizontal auger 1, the more heavily moistened powder reaches the bottom of the vertical auger 3 before the less moistened powder. Part of this first-arriving powder is blocked by the vertical sleeve 31 and remains outside the sleeve 31, while the other part enters the sleeve 31 and is lifted by the vertical auger 3. Subsequently, the lighter powder remains in front of the powder inlet 311. As powder continues to enter, the powder in front of the powder inlet 311 gradually accumulates, sealing the inlet 311. When the powder accumulates to the oblique cut 3111 position... Heavier powder will be stacked on top of lesser powder along the oblique cut 3111. When the heavier powder is stacked on top of the lighter powder to a certain extent, the heavier powder will squeeze the lighter powder towards the powder inlet 311. Finally, with the vibration brought by the operation of the vertical auger 3, the lighter powder collapses and enters the powder inlet 311 along with the heavier powder. During this process, a small amount of powder still enters the powder inlet 311. As the vertical auger 3 rotates, this powder is thrown out at various heights in the vertical direction of the powder inlet 311 due to centrifugal force, impacting the powder stack and helping to disrupt the stability of the powder stack.

[0038] Example 2: Example 2 is basically the same as Example 1, and the similarities will not be repeated. The difference is that the powder inlet 311 is angled towards the ramp 21, which makes the powder weight distribution at the powder inlet 311 more uneven, so as to facilitate the powder entry.

Claims

1. A method for preventing wet powder from clogging the feed inlet, comprising a horizontal conveying mechanism disposed at the bottom of a powder shaking box, a transfer box disposed at one end of the horizontal conveying mechanism, and a vertical auger inserted vertically into the transfer box; characterized in that, The horizontal conveying mechanism is a horizontal auger; the horizontal auger is inserted into the side of the transfer box; the vertical auger passes through the top of the transfer box and rotates with the bottom of the transfer box; a ramp is provided between the end of the horizontal auger and the bottom of the vertical auger; a vertical sleeve is fitted over the vertical auger; the lower end of the vertical sleeve is connected to the bottom of the transfer box, and a powder inlet is provided on the side facing the ramp; the upper end of the powder inlet is a slanted cut. The powder entering the transfer box is propelled by the centrifugal force of the horizontal auger towards the bottom of the vertical auger along the ramp. The heavier powder reaches the bottom of the vertical auger before the lighter powder. Some of this first powder is blocked by the vertical sleeve and remains outside the sleeve, while the rest enters the sleeve and is lifted by the auger. The lighter powder remains in front of the inlet. As more powder enters, it gradually accumulates and blocks the inlet. When the powder accumulates to the angled cut, the heavier powder is pressed down on top of the lighter powder. When the heavier powder accumulates to a certain extent, it pushes the lighter powder towards the inlet. Finally, the vibration from the vertical auger's operation causes the lighter powder to collapse, carrying the heavier powder into the inlet.

2. The anti-clogging feed inlet for wet powder according to claim 1, characterized in that: The horizontal auger is equipped with a horizontal motor, a horizontal drive wheel, a horizontal driven wheel, and a transmission belt at the end facing away from the transfer box; the output end of the horizontal motor is coaxially fixed to the horizontal drive wheel; the horizontal driven wheel is coaxially fixed to the horizontal auger; the horizontal drive wheel and the horizontal driven wheel are connected by the transmission belt.

3. The anti-clogging feed inlet for wet powder according to claim 1, characterized in that: The transfer box is equipped with a horizontal U-shaped frame; the end of the horizontal auger is rotatably engaged with the closed end of the U-shaped frame; a scraper is installed at the end of the horizontal auger; the scraper is located above the ramp.

4. The anti-clogging feed inlet for wet powder according to claim 1, characterized in that: The upper end of the vertical auger is equipped with a vertical motor, a vertical drive wheel, a vertical driven wheel, and a transmission belt B; the output end of the vertical motor is coaxially fixed to the vertical drive wheel; the vertical driven wheel is coaxially fixed to the vertical auger; the vertical drive wheel and the vertical driven wheel are connected by the transmission belt B.

5. The anti-clogging feed inlet for wet powder according to claim 1, characterized in that: The transport box has a side cover on the outside.

6. The anti-clogging feed inlet for wet powder according to claim 1, characterized in that: The powder inlet is angled towards the slope.

Images