Powder distribution box with stable output

Abstract

The invention relates to a powder distribution box stable in output. The powder distribution box comprises a box body and a stirring scraper, the upper end of the box is open; a powder outlet is formed in the bottom of the box body; the stirring scraping blade comprises a stirring shaft which rotates vertically and scraping blades which are distributed along the circumference of the stirring shaft; the edge of the scraper clings to the inner wall of the lower end of the box; the number of the scrapers is N; n > = 3; the bottom of the box body is a stirring cavity with a fan-shaped section with a wrap angle not less than 720 degrees; the stirring shaft is arranged in the center of the stirring cavity; the powder outlet is formed in the center of the bottom of the stirring cavity. Through cooperation of the stirring cavity and the scraper, the powder outlet and the opening in the upper end of the box body are separated into two independent spaces; therefore, before reaching the powder outlet, the powder particles are uniformly distributed in the axial direction of the box body through the rotating scraper, so that the powder particles discharged from the powder outlet are uniform and stable.

Description

Technical Field

[0001] The present invention relates to the technical field of powder shaking machines, and in particular to a powder distribution box with stable output. Background Art

[0002] The powder distribution box of the powder shaking machine is a device for distributing powder to the PET film. The upper end of the conventional powder distribution box is open, and a powder outlet is set at the center of the bottom end; a horizontal auger or a scraper shaft with a circumferentially distributed scraper is set at the bottom of the powder distribution box to evenly mix the powder particles entering the powder shaking box. In a conventional powder distribution box, some of the powder outlets are directly connected to the upper opening of the powder distribution box. When the powder particles enter the upper opening of the powder distribution box, some of the powder particles are directly discharged from the powder outlet without being stirred, which greatly reduces the stability of the powder output of the powder distribution box. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problem and provide a powder dispensing box with stable output.

[0004] The technical solution of the present invention is: a powder distribution box with stable output, comprising a box body and a stirring scraper; the upper end of the box body is open; a stirring scraper is arranged at the bottom of the box body, and a powder outlet is arranged at the bottom; the stirring scraper comprises a vertically rotating stirring shaft and scrapers distributed along the circumference of the stirring shaft; the edge of the scraper is in close contact with the inner wall of the lower end of the box body; there are N scrapers; N≥3; the bottom of the box body is a stirring chamber with a fan-shaped cross-section with a wrap angle ≥720°; the stirring shaft is arranged at the center of the stirring chamber; the powder outlet is arranged at the center of the bottom of the stirring chamber.

[0005] Preferably, a rotating motor and a rotating bearing are respectively installed at both ends of the box; the output shaft of the rotating motor is coaxially fixedly connected to the stirring shaft; and the rotating bearing is coaxially installed with the stirring shaft.

[0006] Furthermore, the output shaft of the rotating motor is connected to the stirring shaft through three circumferentially distributed fastening pins.

[0007] Furthermore, the powder distribution box with stable output also includes a U-shaped mounting plate, a large screw, and a small screw; the middle of the U-shaped mounting plate is connected to the stirring shaft through the large screw; and the side of the U-shaped mounting plate is connected to the scraper through the small screw.

[0008] Furthermore, a mounting groove penetrated by a small screw is provided at the bottom end of the scraper blade; the mounting groove penetrates the bottom end of the scraper blade.

[0009] Preferably, the powder distribution box with stable output also includes a shell and a cover; the shell is connected to the upper end of the box body; the cover is buckled on the upper end of the box body and matches the opening of the upper end of the box body.

[0010] Furthermore, a handle is installed at the center of the cover.

[0011] Furthermore, the cover is made of transparent material.

[0012] The beneficial effects of the present invention are as follows: the powder dispensing box with stable output of the present invention has the following advantages: (1) The coordination between the stirring chamber and the scraper of the present invention allows the powder outlet and the upper opening of the box to be separated into two independent spaces; thus, before reaching the powder outlet, the powder particles are evenly distributed along the axial direction of the box by the rotating scraper, thereby ensuring that the powder particles discharged from the powder outlet are uniform and stable; (2) The scraper blade of the present invention has a mounting groove penetrated by a small screw at the bottom end thereof; the mounting groove penetrates the bottom end of the scraper blade; when installing the scraper blade, it is not necessary to completely remove the scraper blade. Instead, the scraper blade only needs to be screwed in to reveal a sufficient gap, the mounting groove is aligned with the small screw, the scraper blade is inserted into the gap, and the large screw is tightened, which is convenient for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional diagram of a powder dispensing box with stable output according to the present invention; Figure 2 is a vertical cross-sectional view of the present invention in Embodiment 1; Figure 3 yes Figure 2 AA section view; Figure 4 yes Figure 3 I magnified view of; Figure 5 yes Figure 2 BB cross-sectional view; Figure 6 yes Figure 2 CC section view; Figure 7 It is a stereogram of the scraper; Figure 8 It is a three-dimensional picture of the box; Fig. 9 is a vertical cross-sectional view of the present invention in Embodiment 2; Fig.10 yes Fig. 9 DD cross-sectional view; Fig.11 yes Fig. 9 EE cross-sectional view; In the figure: 1. box body, 111. powder outlet, 112. stirring chamber, 121. rotating motor, 122. rotating bearing, 21. stirring shaft, 211. fastening nail, 22. scraper, 221. mounting groove, 3. U-shaped mounting plate, 4. large screw, 5. small screw, 6. outer shell, 7. cover, 71. handle, 8. Z-shaped clamp. Implementation

[0014] Example 1: See Figure 1-8, a powder distribution box with stable output, comprising a box body 1 and a stirring scraper; the upper end of the box body 1 is open for the entry of powder particles; a stirring scraper is arranged at the bottom of the box body 1, and a powder outlet 111 is arranged at the bottom; the stirring scraper stirs the powder particles; the powder outlet 111 is used for discharging the powder particles for powder distribution; the stirring scraper comprises a stirring shaft 21 rotating vertically, and scrapers 22 distributed along the circumference of the stirring shaft 21; the edge of the scraper 22 is in close contact with the inner wall of the lower end of the box body 1; the edge of the scraper 22 comprises an upper edge and two side edges; the upper edge and the two side edges are both in close contact with the inner wall of the lower end of the box body 1 to stir the box Powder particles in the box body 1; there are N scrapers 22; N≥3; N=3 in this embodiment; the bottom of the box body 1 is a stirring chamber 112 with a fan-shaped cross-section with a wrap angle ≥720°; the stirring shaft 21 is arranged at the center of the stirring chamber 112; the powder outlet 111 is arranged at the center of the bottom of the stirring chamber 112; the scraper 22 separates the upper open end of the box body 1 and the powder outlet 111 into two independent spaces; the powder particles in the stirring chamber 112 can be evenly distributed as the scraper 22 rotates before reaching the powder outlet 111; after the powder particles reach the powder outlet 111, they are evenly distributed and discharged from the powder outlet 111.

[0015] Compared with the prior art, the present invention separates the powder outlet 111 and the upper opening of the box body 1 into two independent spaces by cooperating with the stirring chamber 112 and the scraper 22; thus, before the powder particles reach the powder outlet 111, they are evenly distributed along the axial direction of the box body 1 by the rotating scraper 22, thereby ensuring that the powder particles discharged from the powder outlet 111 are uniform and stable.

[0016] There are several rows of powder outlets 111; each row of powder outlets 111 is evenly distributed along the axial direction of the box body 1; adjacent rows of powder outlets 111 are arranged at intervals, so that each section in the axial direction of the box body 1 has a powder outlet 111, ensuring that all powder particles in the axial direction of the box body 1 can be discharged from the powder outlet 111, ensuring stable output of the powder shaking box. In this embodiment, there are 2 rows of powder outlets 111.

[0017] A rotating motor 121 and a rotating bearing 122 are respectively installed at both ends of the box body 1; the output shaft of the rotating motor 121 is coaxially fixed to the stirring shaft 21; the rotating motor 121 outputs a twist to drive the scraper 22 to rotate; the rotating bearing 122 is coaxially installed with the stirring shaft 21 to reduce the friction when the stirring scraper rotates.

[0018] The output shaft of the rotary motor 121 is connected to the stirring shaft 21 through three circumferentially distributed fastening pins 211 to establish a stable connection relationship.

[0019] The powder distribution box with stable output also includes a U-shaped mounting plate 3, a large screw 4, and a small screw 5; the middle part of the U-shaped mounting plate 3 is connected to the stirring shaft 21 through the large screw 4; the side of the U-shaped mounting plate 3 is connected to the scraper 22 through the small screw 5; the scraper 22 is detachably connected to the stirring shaft 21 and can be replaced after the scraper 22 is severely worn.

[0020] The bottom end of the scraper 22 is provided with a mounting groove 221 penetrated by a small screw 5; the mounting groove 221 penetrates the bottom end of the scraper 22; when installing the scraper 22, it is not necessary to completely remove it. It is only necessary to screw in the large screw 4 to expose a sufficient gap, align the mounting groove 221 with the small screw 5, insert the scraper 22 into the gap, and then tighten the large screw 4, which is convenient for installation.

[0021] The powder distribution box with stable output also includes an outer shell 6 and a cover 7; the outer shell 6 is connected to the upper end of the box body 1 to facilitate the installation of the box body 1 and other parts of the powder shaking machine; the cover 7 is buckled on the upper end of the box body 1 and matches the upper end opening of the box body 1 to close the upper end opening of the box body 1 to prevent debris from entering.

[0022] A handle 71 is installed at the center of the cover 7 to facilitate the operation of opening the cover 7.

[0023] The cover 7 is made of transparent material to facilitate observation of the powder on the stirring blade and to add powder at any time. If the powder particles do not decrease much after the stirring blade rotates one circle, it indicates that the powder outlet 111 may be blocked and should be repaired in time. If the powder particles on the stirring blade decrease significantly, it is necessary to add powder particles.

[0024] The working principle of this embodiment is as follows: the scraper 22 separates the upper open end of the box body 1 and the powder outlet 111 into two independent spaces; the powder particles in the stirring chamber 112 can be evenly distributed as the scraper 22 rotates before reaching the powder outlet 111; after the powder particles reach the powder outlet 111, they are evenly and stably distributed and discharged from the powder outlet 111.

[0025] Example 2: See Figure 9-11 , Embodiment 2 is basically the same as Embodiment 1, and the similarities are not repeated here. The differences are: it also includes a Z-shaped clamping plate 8; N in this embodiment is 4, there are two U-shaped mounting plates 3; there is one large screw 4; the two U-shaped mounting plates 3 are arranged opposite to each other; the large screw 4 passes through the U-shaped mounting plate 3 and the stirring shaft 21, and is fixed by a nut; the Z-shaped clamping plate 8 installs the scraper 22 at the end of the U-shaped mounting plate 3 by means of a small screw 5, and the bottom end of the bone piece is closed.

[0026] Compared with the first embodiment, the scraper blades 22 installed in the second embodiment are an even number; every two scraper blades 22 form a group and are arranged opposite to each other; through the above-mentioned connection method, the installation amount can be greatly reduced, which is conducive to on-site maintenance and replacement.

Claims

1. A powder distribution box with stable output, comprising a box body and a stirring scraper; the upper end of the box body is open; a stirring scraper is arranged at the bottom of the box body, and a powder outlet is arranged at the bottom; the stirring scraper comprises a stirring shaft rotating vertically and scrapers distributed along the circumference of the stirring shaft; the edge of the scraper is in close contact with the inner wall of the lower end of the box body; characterized in that, There are N scrapers; N≥3; the bottom of the box is a stirring chamber with a fan-shaped cross-section with a wrap angle of ≥720°; the stirring shaft is arranged at the center of the stirring chamber; and the powder outlet is arranged at the center of the bottom of the stirring chamber.

2. The powder dispensing box with stable output according to claim 1, characterized in that: A rotating motor and a rotating bearing are respectively installed at both ends of the box; the output shaft of the rotating motor is coaxially fixedly connected with the stirring shaft; and the rotating bearing is coaxially installed with the stirring shaft.

3. The powder dispensing box with stable output according to claim 2, characterized in that: The output shaft of the rotating motor is connected to the stirring shaft through three circumferentially distributed fastening pins.

4. The powder dispensing box with stable output according to claim 2, characterized in that: It also includes a U-shaped mounting plate, a large screw and a small screw; the middle of the U-shaped mounting plate is connected to the stirring shaft through the large screw; and the side of the U-shaped mounting plate is connected to the scraper through the small screw.

5. The powder dispensing box with stable output according to claim 4, characterized in that: The bottom end of the scraper is provided with a mounting groove penetrated by a small screw; the mounting groove penetrates the bottom end of the scraper.

6. The powder dispensing box with stable output according to claim 1, characterized in that: The utility model also comprises an outer shell and a cover; the outer shell is connected with the upper end of the box body; the cover is buckled on the upper end of the box body and matched with the opening of the upper end of the box body.

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