Automatic powder returning device and powder shaking machine

Abstract

The utility model discloses an automatic powder return device and shaker, the automatic powder return device comprises a stock bin, a powder collecting device and a powder return mechanism, the bottom of the stock bin is provided with a plurality of powder scattering holes, the plurality of powder scattering holes are arranged at intervals, the powder collecting device is located below the plurality of powder scattering holes, and the powder return mechanism comprises a fan, an anti-blocking device and a conveying pipeline. The fan is provided with an air inlet and an air outlet, the air inlet is connected with one end of the anti-blocking device, the anti-blocking device is communicated with the powder collecting device, one end of the conveying pipeline is connected with the air outlet, and the other end of the conveying pipeline is communicated with the stock bin. And when the fan adsorbs the hot melting powder, the anti-blocking device shunts the hot melting powder, so that the fan is prevented from being blocked by excessive hot melting powder, and the normal operation of the automatic powder returning device is ensured. Scattered hot melting powder is recycled through the powder collecting device, then the hot melting powder of the powder collecting device is recycled into the stock bin through the powder returning mechanism to be reused, and the process is repeated in this way, so that cyclic utilization of the hot melting powder is achieved.

Description

Technical Field

[0001] The utility model relates to the field of powder shaking machines, and in particular to an automatic powder returning device and a powder shaking machine. Background Art

[0002] During operation, the heat transfer printer prints a pattern on the heat transfer film, and then sprinkles hot melt powder on the heat transfer film with the pattern printed on it, so that the hot melt powder adheres to the pattern on the heat transfer film. The heating device heats and melts the hot melt powder on the pattern on the heat transfer film, so that the hot melt powder adheres firmly to the heat transfer film. In this process, the hot melt powder outside the pattern on the heat transfer film needs to be shaken off to prevent the hot melt powder from adhering to other places on the heat transfer film.

[0003] However, conventional powder shaking machines all have a powder box at the bottom of the powder shaking box to receive the hot melt powder that falls off. When the powder box is full, the hot melt powder in the powder box is manually put back into the powder spreading mechanism. In order to improve the powder return efficiency, a material circulation mechanism with a powder return function has appeared on the market. For example, the application number is CN215063596U, and the patent name is a technical solution to be protected by a material circulation mechanism for a powder shaking dryer. However, this technical solution is prone to hot melt powder blockage during the powder return process. The hot melt powder blockage will reduce the powder return efficiency, which will seriously affect the normal use of the powder shaking machine. Utility Model Content

[0004] In view of the shortcomings of the prior art, an automatic powder returning device and a powder shaking machine are provided.

[0005] To achieve the above-mentioned purpose, the utility model provides an automatic powder return device, including a silo, a powder collecting device and a powder return mechanism. A plurality of powder sprinkling holes are provided at the bottom of the silo, and the plurality of powder sprinkling holes are arranged at intervals. The powder collecting device is located below the plurality of powder sprinkling holes. The powder return mechanism includes a fan, an anti-blocking device and a conveying pipeline. The fan has an air inlet and an air outlet, the air inlet is connected to one end of the anti-blocking device, the anti-blocking device is connected to the powder collecting device, one end of the conveying pipeline is connected to the air outlet, and the other end of the conveying pipeline is connected to the silo.

[0006] According to one embodiment of the utility model, the anti-blocking device includes a plug and a diverter portion, one end of the plug is connected to the diverter portion, the other end of the plug is connected to the air inlet, and two diverter ports are spaced apart on the side wall of the diverter portion; the two diverter ports are connected to the powder collecting device.

[0007] According to one embodiment of the utility model, the plug includes a first connecting part and a second connecting part, one end of the first connecting part is connected to the diverter part, the other end of the first connecting part is connected to one end of the second connecting part, the other end of the second connecting part is connected to the air inlet, and the inner diameter of the second connecting part gradually decreases in the direction away from the diverter part.

[0008] According to one embodiment of the utility model, the powder collecting device includes a powder collecting trough and a pushing assembly. The powder collecting trough is located below the multiple powder sprinkling holes. The powder collecting trough is connected to the anti-blocking device. The pushing assembly includes a rotating screw and a driving assembly. The rotating screw is arranged at the bottom of the powder collecting trough. The driving assembly is connected to one end of the rotating screw. The driving assembly drives the rotating screw to rotate.

[0009] According to one embodiment of the utility model, the driving assembly includes a motor, a driving wheel, a driven wheel and a conveyor belt. The motor is arranged on one side of the powder collecting trough, the driving wheel is connected to the driving end of the motor, the driven wheel is connected to one end of the rotating screw, and the driving wheel and the driven wheel are connected through a conveyor belt transmission.

[0010] According to one embodiment of the utility model, the powder collecting device also includes a powder collecting box, which is connected to one end of the powder collecting slot, the powder collecting box is communicated with the powder collecting slot, the anti-blocking device is located in the powder collecting box, and the anti-blocking device is communicated with the powder collecting box.

[0011] According to one embodiment of the utility model, the powder collecting trough includes a trough body, a first baffle plate and a second baffle plate, the trough body includes a first trough wall and a second trough wall, an angle ∠1 is formed between the first trough wall and the second trough wall, 45°≤angle ∠1≤90°, the first baffle plate is connected to the first trough wall, an angle ∠2 is formed between the first baffle plate and the first trough wall, and 90°<angle ∠2<180°, the second baffle plate is connected to the second trough wall, an angle ∠3 is formed between the second baffle plate and the second trough wall, and 90°<angle ∠3≤180°, and a rotating screw is arranged at the bottom of the trough body.

[0012] The utility model also provides a powder shaking machine, comprising the above automatic powder returning device.

[0013] The beneficial effect of the utility model is that by setting a silo, a powder collecting device and a powder returning mechanism, wherein the powder returning mechanism includes a fan, an anti-blocking device and a conveying pipeline, the air inlet of the fan is connected to the anti-blocking device, and when the fan absorbs hot melt powder, the anti-blocking device diverts the hot melt powder to avoid the excessive amount of hot melt powder blocking the fan, thereby ensuring the normal operation of the automatic powder returning device. The air outlet of the fan is connected to one end of the conveying pipeline, the anti-blocking device is connected to the powder collecting device, and the other end of the conveying pipeline is connected to the silo. The spilled hot melt powder is recovered by the powder collecting device, and then the hot melt powder of the powder collecting device is recovered into the silo by the powder returning mechanism for reuse, and this is repeated to achieve the recycling of the hot melt powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1is a schematic diagram of a powder recycling device in an embodiment;

[0016] Figure 2 Schematic diagram of the silo in the embodiment;

[0017] Figure 3 It is an enlarged view of point A in the embodiment;

[0018] Figure 4 is a schematic diagram of a powder return mechanism in an embodiment;

[0019] Figure 5 is a cross-sectional view of the anti-blocking device in the embodiment;

[0020] Figure 6 is a schematic diagram of a powder collecting device in an embodiment;

[0021] Figure 7 Schematic diagram of the powder collecting tank in the embodiment.

[0022] Description of Reference Numerals

[0023] 1-bin; 10-powder sprinkling hole; 2-powder collecting device; 21-powder collecting trough; 22-pushing assembly; 221-rotating screw; 222-driving assembly; 2221-motor; 2222-driving wheel; 2223-driven wheel; 2224-conveyor belt; 23-powder collecting box; 3-powder returning mechanism; 31-fan; 311-air inlet; 312-air outlet; 32-anti-blocking device; 321-plug; 3211-first connecting part; 3212-second connecting part; 322-diverter part; 3221-diverter port; 33-conveying pipeline. DETAILED DESCRIPTION

[0024] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0025] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0026] Please refer to Figure 1-Figure 4 , Figure 1 This is a schematic diagram of the automatic powder return device. Figure 2 The schematic diagram of the silo is shown in Figure 1. Figure 3 This is the enlarged view of point A. Figure 4 It is a schematic diagram of a powder return mechanism. The present embodiment provides an automatic powder return device, which includes a silo 1, a powder collecting device 2 and a powder return mechanism 3. A plurality of powder sprinkling holes 10 are provided at the bottom of the silo 1, and the plurality of powder sprinkling holes 10 are arranged at intervals. The powder collecting device 2 is located below the plurality of powder sprinkling holes 10, and the powder return mechanism 3 is connected to the silo 1 and the powder collecting device 2, respectively. Among them, the silo 1 is used to place hot melt powder, and the hot melt powder is sprinkled on the painting film through the powder sprinkling holes 10, the powder collecting device 2 is used to receive the hot melt powder that is shaken off, and the powder return mechanism 3 is used to automatically recycle the hot melt powder in the powder collecting device 2 back to the silo 1, so as to realize the secondary utilization of the hot melt powder.

[0027] Specifically, the powder return mechanism 3 includes a fan 31, an anti-blocking device 32 and a conveying pipeline 33. The fan 31 has an air inlet 311 and an air outlet 312. The air inlet 311 of the fan 31 is connected to one end of the anti-blocking device 32, and the anti-blocking device 32 is connected to the powder collecting device 2. One end of the conveying pipeline 33 is connected to the air outlet 312 of the fan 31, and the other end of the conveying pipeline 33 is connected to the silo 1.

[0028] When in use, the air inlet 311 of the fan 31 generates negative pressure, so that the hot melt powder in the powder collecting device 2 is adsorbed into the anti-blocking device 32. During the adsorption process, the anti-blocking device 32 diverts the hot melt powder to prevent the hot melt powder from being blocked at the air inlet 311 of the fan 31. After passing through the anti-blocking device 32, the hot melt powder is adsorbed into the fan 31, and then blown into the conveying pipe 33 by the air outlet 312 of the fan 31, and re-enters the silo 1 along the conveying pipe 33 to realize the automatic recovery of the hot melt powder. Finally, it is evenly sprinkled onto the painting film again through the multiple powder sprinkling holes 10 of the silo 1, and the hot melt powder is effectively prevented from being blocked in the silo 1. Repeating this process can realize the recycling and reuse of the hot melt powder.

[0029] Please refer to Figure 5 , Figure 5 It is a cross-sectional view of the anti-blocking device. Furthermore, the anti-blocking device 32 includes a plug 321 and a diverter 322, and one end of the plug 321 is connected to the diverter 322. The side wall of the diverter 322 is provided with two diverter ports 3221 at intervals, and the two diverter ports 3221 are connected, and the two diverter ports 3221 are connected to the powder collecting device 2. By arranging two diverter ports 3221 on the side wall of the plug 321, the hot melt powder is diverted into the fan 31, avoiding excessive powder inlet 311 of the fan 31 causing blockage of the air inlet 311 of the fan 31, and maintaining the normal operation of the automatic powder return device. Preferably, the plug 321 and the diverter 322 are integrally formed.

[0030] Furthermore, the plug 321 includes a first connection part 3211 and a second connection part 3212, the second connection part 3212 is arranged at one end of the first connection part 3211, and the first connection part 3211 is communicated with the second connection part 3212, the end of the first connection part 3211 away from the second connection part 3212 is connected to the diversion part 322, and the inner diameter of the second connection part 3212 gradually decreases along the direction away from the diversion part 322, and the end of the second connection part 3212 away from the first connection part 3211 is connected to the air inlet 311 of the fan 31.

[0031] The hot melt powder enters the plug 321 after entering the diversion part 322 , and enters the fan 31 through the second connection part 3212 after gradually reducing the amount of hot melt powder passing through the first connection part 3211 , thereby preventing the hot melt powder from excessively blocking the air inlet 311 of the fan 31 .

[0032] Please refer to Figure 6 , Figure 6 Schematic diagram of the powder collecting device. In addition, the powder collecting device 2 includes a powder collecting trough 21 and a pushing assembly 22. The powder collecting trough 21 is located below the silo 1, and the powder collecting trough 21 is connected to the anti-blocking device 32. The powder collecting trough 21 is used to collect the hot melt powder that is shaken off. The pushing assembly 22 includes a rotating screw 221 and a driving assembly 222. The rotating screw 221 is arranged in the powder collecting trough 21 and is located at the bottom of the powder collecting trough 21. The driving assembly 222 is arranged at one end of the rotating screw 221, and the driving assembly 222 is connected to the rotating screw 221 in a transmission manner. The driving assembly 222 is used to drive the rotating screw 221 to rotate. When the rotating screw 221 rotates, it pushes the hot melt powder in the powder collecting trough 21, so that the hot melt powder moves in the direction of the anti-blocking device 32, and the rotating screw 221 is continuously rotated to effectively prevent the hot melt powder from settling at the bottom of the powder collecting trough 21, thereby accelerating the recovery efficiency of the automatic powder return device.

[0033] Furthermore, the driving assembly 222 includes a motor 2221, a driving wheel 2222, a driven wheel 2223 and a conveyor belt 2224. The motor 2221 is disposed at one side of the powder collecting tank 21. The driving wheel 2222 is connected to the driving end of the motor 2221. The motor 2221 drives the driving wheel 2222 to rotate. The driven wheel 2223 is connected to one end of the rotating screw 221, and the driving wheel 2222 is connected to the driven wheel 2223 through the conveyor belt 2224.

[0034] During operation, the motor 2221 drives the driving wheel 2222 to rotate, and the driving wheel 2222 synchronously drives the driven wheel 2223 to rotate through the conveyor belt 2224, so that the rotating screw 221 rotates following the rotation of the driven wheel 2223.

[0035] Please refer to Figure 7 , Figure 7 Schematic diagram of a powder collecting tank. The powder collecting tank 21 includes a tank body (211), a first baffle (212) and a second baffle (213), wherein the tank body (211) includes a first tank wall (2111) and a second tank wall (2112), an angle ∠1 is formed between the first tank wall (2111) and the second tank wall (2112), and 45°≤angle ∠1≤90°, so that the tank body is arranged in a "V" shape, which is convenient for collecting hot melt powder, and the rotating screw 221 is arranged at the bottom of the tank body 211. The first baffle 212 is connected to the first tank wall 2111, and an angle ∠2 is formed between the first baffle 213 and the first tank wall 2111, and 90°<angle ∠2<180°. The second baffle 213 is connected to the second groove wall 2112, and an angle ∠3 is formed between the second baffle 213 and the second groove wall 2112, and 90°<angle ∠3≤180°. The first baffle 212 and the second baffle 213 are provided to prevent the hot melt powder from scattering to other places when it is shaken off, so as to collect the hot melt powder to the greatest extent.

[0036] Furthermore, the powder collecting device 2 further includes a powder collecting box 23, which is connected to one end of the powder collecting slot 21 and communicates with the powder collecting slot 21. The anti-blocking device 32 is located in the powder collecting box 23, and the interior of the anti-blocking device 32 communicates with the powder collecting box 23. The powder collecting box 23 is used to better collect the hot melt powder in the powder collecting slot 21. After the hot melt powder is concentrated in the powder collecting slot 21, it is convenient for the fan 31 to better suck the hot melt powder, thereby accelerating the efficiency of the recycling cycle.

[0037] The utility model also provides a powder shaking machine, comprising the above-mentioned automatic powder returning device.

[0038] In summary, by setting the silo 1, the powder collecting device 2 and the powder returning mechanism 3, wherein the powder returning mechanism 3 includes a fan 31, an anti-blocking device 32 and a conveying pipeline 33, the air inlet 311 of the fan 31 is connected to the anti-blocking device 32, when the fan 31 absorbs the hot melt powder, the anti-blocking device 32 diverts the hot melt powder to prevent the hot melt powder from blocking the fan 31 due to excessive weight, thereby ensuring the normal operation of the automatic powder returning device. The air outlet 312 of the fan 31 is connected to one end of the conveying pipeline 33, the anti-blocking device 32 is connected to the powder collecting device 2, and the other end of the conveying pipeline 33 is connected to the silo 1. The spilled hot melt powder is recovered by the powder collecting device 2, and then the hot melt powder of the powder collecting device 2 is recovered to the silo 1 by the powder returning mechanism 3 for reuse, and this is repeated to achieve the recycling of the hot melt powder.

[0039] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. An automatic powder return device, characterized in that: include: A material silo (1), a powder collecting device (2) and a powder returning mechanism (3), wherein a plurality of powder spreading holes (10) are provided at the bottom of the material silo (1), the plurality of powder spreading holes (10) are arranged at intervals, the powder collecting device (2) is located below the plurality of powder spreading holes (10), the powder returning mechanism (3) comprises a fan (31), an anti-blocking device (32) and a conveying pipeline (33), the fan (31) having an air inlet (311) and an air outlet (312), the air inlet (311) being connected to one end of the anti-blocking device (32), the anti-blocking device (32) being connected to the powder collecting device (2), one end of the conveying pipeline (33) being connected to the air outlet (312), and the other end of the conveying pipeline (33) being connected to the material silo (1).

2. The automatic powder return device according to claim 1, characterized in that: The anti-blocking device (32) comprises a plug (321) and a diverter portion (322); one end of the plug (321) is in communication with the diverter portion (322); the other end of the plug (321) is in communication with the air inlet (311); two diverter ports (3221) are spaced apart on the side wall of the diverter portion (322); the two diverter ports (3221) are in communication with the powder collecting device (2).

3. The automatic powder return device according to claim 2, characterized in that: The plug (321) includes a first connecting portion (3211) and a second connecting portion (3212), one end of the first connecting portion (3211) is connected to the diverter portion (322), the other end of the first connecting portion (3211) is connected to one end of the second connecting portion (3212), the other end of the second connecting portion (3212) is connected to the air inlet (311), and the inner diameter of the second connecting portion (3212) gradually decreases in a direction away from the diverter portion (322).

4. The automatic powder return device according to claim 1, characterized in that: The powder collecting device (2) comprises a powder collecting trough (21) and a pushing assembly (22), wherein the powder collecting trough (21) is located below the plurality of powder sprinkling holes (10), the powder collecting trough (21) is connected to the anti-blocking device (32), and the pushing assembly (22) comprises a rotating screw (221) and a driving assembly (222), wherein the rotating screw (221) is located at the bottom of the powder collecting trough (21), and the driving assembly (222) is connected to one end of the rotating screw (221), and the driving assembly (222) drives the rotating screw (221) to rotate.

5. The automatic powder return device according to claim 4, characterized in that: The driving assembly (222) comprises a motor (2221), a driving wheel (2222), a driven wheel (2223) and a conveyor belt (2224); the motor (2221) is arranged at one side of the powder collecting tank (21); the driving wheel (2222) is connected to the driving end of the motor (2221); the driven wheel (2223) is connected to one end of the rotating screw (221); and the driving wheel (2222) and the driven wheel (2223) are connected to each other through the conveyor belt (2224).

6. The automatic powder return device according to claim 4, characterized in that: The powder collecting device (2) further comprises a powder collecting box (23), wherein the powder collecting box (23) is connected to one end of the powder collecting groove (21), the powder collecting box (23) is communicated with the powder collecting groove (21), and the anti-blocking device (32) is located in the powder collecting box (23), and the anti-blocking device (32) is communicated with the powder collecting box (23).

7. The automatic powder return device according to claim 4, characterized in that: The powder collecting trough (21) comprises a trough body (211), a first baffle (212) and a second baffle (213); the trough body (211) comprises a first trough wall (2111) and a second trough wall (2112); an angle ∠1 is formed between the first trough wall (2111) and the second trough wall (2112); 45°≤angle ∠1≤90°; the first baffle (212) is connected to the first trough wall (2111); An included angle ∠2 is formed between the first baffle plate (212) and the first groove wall (2111), and 90°<the included angle ∠2<180°; the second baffle plate (213) is connected to the second groove wall (2112); an included angle ∠3 is formed between the second baffle plate (213) and the second groove wall (2112), and 90°<the included angle ∠3≤180°; the rotating screw (221) is arranged at the bottom of the groove body (211).

8. A powder shaking machine, characterized in that: Including the automatic powder returning device described in any one of claims 1-7.

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