An automatic powder control device and a powdering machine comprising the same

Abstract

The application discloses an automatic powder control device and a powder spraying machine comprising the same. The automatic powder control device comprises a support assembly and a film supporting assembly connected with the support assembly. A weighing sensor connected with an external object is arranged on the support assembly and / or the film supporting assembly. The weighing sensor is electrically connected with a controller. The support assembly comprises a support side plate. The film supporting assembly is arranged on the inner side of the support side plate. The film supporting assembly comprises a film supporting side plate. The outer side of the film supporting side plate is provided with a side plate rotating shaft movably sleeved with the support side plate. A film supporting assembly driver is arranged on the side plate rotating shaft. The film supporting assembly driver can drive the film supporting assembly to ascend and / or rotate relative to the support side plate. The weighing sensor is adopted to accurately and continuously monitor the weight of the powder on the powder receiving film. Then, the powder spraying control is accurately performed according to the weight of the powder. The powder waste or poor powder receiving caused by too much or too little powder on the powder receiving film is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powdering machines, in particular to an automatic powder control device and a powdering machine comprising the same. BACKGROUND

[0002] Powdering machines are widely used in the fields of heat transfer printing, printing powder shaking machines and food processing. In order to ensure that the powder receiving area of the powder receiving film is fully and evenly coated, the powdering machine spreads an excessive amount of powder on the powder receiving film to ensure that the powder receiving area is evenly coated. However, the excessive amount of powder will cause the unabsorbed powder to fall off the workpiece, resulting in waste.

[0003] In the prior art, the amount of powder spread is controlled or the weight of the powder in the powdering device is monitored according to the running time. However, these methods cannot accurately determine the amount of powder on the powder receiving film.

[0004] Therefore, there is an urgent need to design an automatic powder control device that can accurately determine the amount of powder on the powder receiving film and reduce powder waste or poor powder receiving. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide an automatic powder control device and a powdering machine comprising the same. A weighing sensor is used to accurately and continuously monitor the weight of the powder on the powder receiving film, and then the powdering control is accurately performed according to the weight of the powder, thereby avoiding powder waste or poor powder receiving caused by excessive or insufficient powder on the powder receiving film.

[0006] To solve the above problems, the technical scheme adopted by the present application is as follows:

[0007] An automatic powder control device, characterized in that it comprises a support assembly (10) and a film supporting assembly (20) connected to the support assembly (10), a weighing sensor (30) connected to an external object is arranged on the support assembly (10) and / or the film supporting assembly (20), and the weighing sensor (30) is electrically connected to a controller.

[0008] Preferably, the support assembly (10) comprises a support side plate (11), and the film supporting assembly (20) is arranged on the inner side of the support side plate (11).

[0009] The film supporting assembly (20) comprises a film supporting side plate (21), the outer side of the film supporting side plate (21) is provided with a side plate rotating shaft (22) movably sleeved with the support side plate (11), and a film supporting assembly driver (40) for driving the film supporting assembly (20) to ascend and / or rotate relative to the support side plate (11) is arranged on the side plate rotating shaft (22); the film supporting assembly driver (40) is electrically connected to the controller.

[0010] The two ends of the bracket side plate (11) are respectively provided with a weighing sensor (30).

[0011] Preferably, the main roller (23) and the weighing roller (25) in a cylindrical structure are arranged between the film supporting side plates (21), and the main roller (23) and the weighing roller (25) are respectively rotationally sleeved with the film supporting side plates (21).

[0012] The rotation axis of the side plate rotating shaft (22) does not coincide with the midpoint of the connecting line of the center axes of the main roller (23) and the weighing roller (25).

[0013] One end of the main roller (23) and / or the weighing roller (25) is provided with an inductive sheet (28), and the film supporting side plate (21) is provided with a rotation sensor (27) for monitoring the rotation state of the inductive sheet (28) at a position corresponding to the inductive sheet (28), and the rotation sensor (27) is electrically connected with the controller.

[0014] Preferably, the film supporting assembly driver (40) is a rotary motor.

[0015] Preferably, at least one side of the main roller (23) is provided with a side roller (24) in a cylindrical structure, and the side roller (24) is rotationally sleeved with the film supporting side plate (21).

[0016] One end of the side roller (24) is provided with an inductive sheet (28), and the film supporting side plate (21) is provided with a rotation sensor (27) for monitoring the rotation state of the inductive sheet (28) at a position corresponding to the inductive sheet (28), and the rotation sensor (27) is electrically connected with the controller.

[0017] Preferably, the inductive sheet (28) is a non-continuous metal material rotary body, and the rotation sensor (27) is a proximity sensor.

[0018] Preferably, the inside of the bracket side plate (11) is provided with a connecting rod (12) and / or a baffle (13) in a "V" shape distribution with the side plate rotating shaft 22.

[0019] Preferably, the weighing roller (25) is provided with a plurality of powder uniformizing sheets (26), and the powder uniformizing sheets (26) make the surface of the weighing roller (25) present an interlaced convex structure.

[0020] Preferably, one end of the weighing roller (25) is provided with a powder uniformizing driver (29) for driving the rotation of the weighing roller (25).

[0021] A powder scattering machine, comprising the automatic powder control device and a powder scattering device (50) arranged above the automatic powder control device, and the powder scattering device (50) is electrically connected with the controller.

[0022] Compared with the prior art, the application has the beneficial effects that:

[0023] 1. The weighing sensor is used to accurately and continuously monitor the weight of the powder on the powder receiving film, so as to avoid waste of powder or poor powder receiving caused by too much or too little powder on the powder receiving film;

[0024] 2. The main roller and the weighing roller are arranged on the film supporting assembly, and under the driving of the film supporting assembly driver, the main roller and the weighing roller are alternately contacted with the powder receiving film to realize switching between the "non-weighing state" and the "weighing state", so as to meet the accuracy of weighing in the "weighing state" and the running stability of the powder receiving film in the "non-weighing state";

[0025] 3. The side rollers are arranged on both sides of the main roller, and the "V-shaped sag height" of the powder receiving film can be controlled by combining the inductive sheet and the rotary sensor;

[0026] 4. The rotary sensor is a proximity sensor, which can avoid the common photoelectric sensor in the prior art from being disabled due to pollution by the scattered powder, and has high stability and reliability;

[0027] 5. The uniform powder sheet is arranged on the weighing roller, and the uniform powder sheet can make the powder fluctuate and uniformly distribute under the rotation of the weighing roller; meanwhile, in the process of continuous fluctuation, the large particles and foreign matters in the powder are promoted to move to the outside of the powder receiving film and fall off. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a front view of the application;

[0029] Figure 2 is a right view of Figure 1 ;

[0030] Figure 3 is an A-A sectional view of Figure 1 ;

[0031] Figure 4 is a B partial enlarged view of Figure 3 ;

[0032] Figure 5 is an overall structure schematic view of the film supporting assembly in the "non-weighing state" of the application;

[0033] Figure 6 is an overall structure schematic view of the film supporting assembly in the "weighing state" of the application (the bracket side plate is in a disassembled state).

[0034] Among them:

[0035] Support assembly 10, support side plate 11, connecting rod 12, baffle 13, film supporting assembly 20, film supporting side plate 21, side plate rotating shaft 22, main roller 23, side roller 24, weighing roller 25, powder uniformizing sheet 26, rotation sensor 27, induction sheet 28, powder uniformizing driver 29, weighing sensor 30, film supporting assembly driver 40, powder scattering device 50, powder receiving film 60. DETAILED DESCRIPTION

[0036] For the purposes of promoting an understanding of the principles of the application, reference will now be made to the embodiments illustrated in the drawings. It is expressly understood that the drawings are presented for the purposes of illustration and teaching the best modes of practicing the application and nothing in the drawing is meant to limit the scope of the application. In the drawings:

[0037] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It is to be understood that the term "comprising" means "including, but not limited to."

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the terms "therefore" and "because" are used in their plain, ordinary sense to mean "as a result of" or "following from."

[0039] The application will now be further described by way of example with reference to the accompanying drawings in which:

[0040] As shown in Figure 1 , 2 , 3, 4, 5, an automatic powder control device includes a support assembly 10 and a film supporting assembly 20 connected to the support assembly 10, the support assembly 10 and / or the film supporting assembly 20 is provided with a weighing sensor 30 connected to an external object, the weighing sensor 30 is electrically connected to a controller.

[0041] Further, the support assembly 10 includes a support side plate 11, and the film supporting assembly 20 is arranged inside the support side plate 11.

[0042] The film supporting assembly 20 comprises film supporting side plates 21, the outer side of the film supporting side plates 21 is provided with side plate rotating shafts 22 which are movably sleeved with the support side plates 11, and the side plate rotating shafts 22 are provided with film supporting assembly drivers 40 which can drive the film supporting assembly 20 to ascend and / or rotate relative to the support side plates 11; the film supporting assembly drivers 40 are electrically connected with the controller.

[0043] The support side plates 11 are respectively provided with weighing sensors 30 at both ends.

[0044] In the embodiment, the powder receiving film 60 is in a "V" shape under the action of the self weight and the weight of the powder, the bottom of the "V" shape is in contact with the film supporting assembly 20, the weighing sensor 30 weighs the total weight of the support assembly 10, the film supporting assembly 20, the powder receiving film 60 and the powder, and then subtracts the weight of the support assembly 10, the film supporting assembly 20 and the powder receiving film 60 which are relatively fixed, so that the weight of the powder can be obtained.

[0045] However, the position of the bottom of the "V" shape of the powder receiving film 60 is not stable during the operation process due to the unwinding speed and the winding speed, and the normal powder receiving or weighing of the powder receiving film 60 can be affected when the bottom of the "V" shape is too high or too low.

[0046] I. When the bottom of the "V" shape of the powder receiving film 60 is too high:

[0047] a) The powder receiving film 60 lacks the buffer between the unwinding and the winding, which can cause the powder receiving film 60 to be excessively stretched and damaged;

[0048] b) The powder receiving film 60 supports the powder, so that the weight cannot be completely reflected on the film supporting assembly 20, and the weighing sensor 30 cannot accurately weigh the weight of the powder.

[0049] II. When the bottom of the "V" shape of the powder receiving film 60 is too low: although the weight of the powder can be accurately weighed, the powder receiving film 60 can be folded on the film supporting assembly 20, which can cause the damage of the powder receiving film 60 and the poor powder receiving.

[0050] Therefore, the film supporting assembly drivers 40 which can drive the film supporting assembly 20 to ascend and / or rotate relative to the support side plates 11 are arranged, so that the film supporting assembly 20 actively and controllably makes appropriate contact with the bottom of the "V" shape, so that the powder receiving film 60 can be well powder received while weighing the powder.

[0051] Further, as shown in Figs. Figure 3 、 4 , 5, 6, the main rollers 23 and the weighing rollers 25 in the cylindrical structure are arranged between the film supporting side plates 21, and the main rollers 23 and the weighing rollers 25 are respectively rotatably sleeved with the film supporting side plates 21;

[0052] The rotation axis of the side plate rotating shaft 22 does not coincide with the midpoint of the connecting line of the center axes of the main roller 23 and the weighing roller 25;

[0053] One end of the main roller 23 and / or the weighing roller 25 is provided with an inductive sheet 28, and the film supporting side plate 21 is provided with a rotation sensor 27 for monitoring the rotation state of the inductive sheet 28 at a position corresponding to the inductive sheet 28, and the rotation sensor 27 is electrically connected to the controller.

[0054] Further, the film supporting assembly driver 40 is a rotary motor.

[0055] In the embodiment, the film supporting assembly 20 has two working states of "non-weighing state" and "weighing state", which are as follows:

[0056] I. Non-weighing state (as shown in FIG. 1) : The "V" bottom of the powder receiving film 60 is in contact with the main roller 23, and the main roller 23 can at least achieve the following functions: Figure 5 a) The rotation state of the main roller 23 can be monitored by the inductive sheet 28 and the rotation sensor 27 to determine the height of the "V" bottom of the powder receiving film 60;

[0057] b) The rotating main roller 23 can reduce the friction during the movement of the powder receiving film 60.

[0058] II. Weighing state (as shown in FIG. 2) : The eccentric structure formed by the fact that the center axis of the side plate rotating shaft 22 does not coincide with the midpoint of the connecting line of the center axes of the main roller 23 and the weighing roller 25 is driven by the film supporting assembly driver 40 to rotate the main roller 23 and the weighing roller 25 around the side plate rotating shaft 22, and after rotation, the weighing roller 25 replaces the main roller 23 to contact the powder receiving film 60, and the weighing roller 25 raises the height of the "V" bottom of the powder receiving film 60, so that the weighing roller 25 fully supports the weight of the powder, thereby achieving the purpose of accurately weighing the weight of the powder.

[0059] Figure 6 In the embodiment, the switching frequency of the "non-weighing state" and the "weighing state" and the duration of each state can be set by the controller.

[0060] In other embodiments, a linearly driven air cylinder, an electric cylinder, a linear motor, etc. can also be selected as the film supporting assembly driver 40, and the height of the film supporting assembly 20 is raised to fully contact the "V" bottom of the powder receiving film 60 to achieve the purpose of weighing.

[0061] Further, at least one side of the main roller 23 is provided with a side roller 24 in a cylindrical structure, and the side roller 24 is rotationally sleeved with the film supporting side plate 21.

[0062] Further, at least one side of the main roller 23 is provided with a side roller 24 in a cylindrical structure, and the side roller 24 is rotationally sleeved with the film supporting side plate 21.

[0063] ​One end of the side roller 24 is provided with a sensing plate 28, and a rotation sensor 27 for monitoring the rotation state of the sensing plate 28 is provided at the position corresponding to the film support side plate 21. The rotation sensor 27 is electrically connected to the controller.

[0064] In this embodiment, side rollers 24 are provided on both sides of the main roller 23. The degree of sagging of the powder-receiving membrane 60 can be determined by the rotation of the side rollers 24. The method for determining whether the bottom height of the "V" shape of the powder-receiving membrane 60 is appropriate in this embodiment is as follows:

[0065] 1. Main roller 23 does not rotate: The bottom height of the powder receiving film 60"V is too high;

[0066] 2. The main roller 23 rotates while the side roller 24 does not rotate: the bottom height of the powder receiving film 60"V is appropriate;

[0067] 3. The main roller 23 and the side roller 24 rotate simultaneously: the bottom height of the powder receiving film 60"V is too low.

[0068] Furthermore, the sensing element 28 is a discontinuous rotating body of metal material, and the rotation sensor 27 is a proximity sensor.

[0069] This embodiment has a simple and reliable structure. The sensing sheet 28 is made by drilling a hole in the center of a rectangular metal sheet to form a non-continuous metal rotating body, which is then installed on the end face of the main roller 23, the side roller 24, and the weighing roller 25. In conjunction with the proximity sensor, it can avoid the photoelectric sensor commonly used in the prior art from being disabled due to contamination by drifting powder.

[0070] Furthermore, such as Figure 2 As shown, the inner side of the bracket side plate 11 is provided with connecting rods 12 and / or baffles 13 that are distributed in a "V" shape with the side plate pivot 22.

[0071] In this embodiment, the connecting rod 12 and / or baffle 13 can improve the stability of the "V" shaped structure formed by the powder receiving film 60 under the action of powder and its own weight during operation, and avoid excessive swaying.

[0072] Furthermore, the weighing roller 25 is provided with a plurality of powder-equalizing sheets 26, which make the surface of the weighing roller 25 have an alternating convex structure.

[0073] In the heat transfer printing technology, in order to obtain different patterns, first, a printer is used to print a powder receiving area on the powder receiving film 60 with a material capable of adsorbing powder, and then the powder is scattered on the powder receiving film 60 to complete the adsorption of the powder. In this way, the powder receiving area of the powder receiving film 60 is not uniform and fixed, and thus the amount of powder adsorbed at different positions is different, which may cause that even if the weight of the powder meets the setting, the distribution of the powder is not uniform, and then the powder receiving area of the powder receiving film 60 may be short of powder. In the embodiment, the weighing roller 25 is provided with the staggered powder leveling pieces 26, and the powder is evenly distributed by the staggered fluctuation of the powder leveling pieces 26 during the rotation of the weighing roller 25.

[0074] Further, one end of the weighing roller 25 is provided with a powder leveling driver 29 for driving the rotation of the weighing roller 25.

[0075] In the embodiment, when the powder leveling driver 29 is not provided, the weighing roller 25 can passively rotate with the powder receiving film 60 under the weight of the powder and the powder receiving film 60 and the contact pressure between the powder receiving film 60 and the weighing roller 25, and the powder leveling pieces 26 make the powder fluctuate and be evenly distributed under the rotation of the weighing roller 25. At the same time, in the process of continuous fluctuation, the large particles and foreign matters in the powder are promoted to move to the outside of the powder receiving film 60 and fall off.

[0076] The provision of the powder leveling driver 29 can make the weighing roller 25 actively rotate without relying on the driving of the powder receiving film 60, so that the rotation speed and direction are more controllable.

[0077] A powder scattering machine comprises the automatic powder control device and a powder scattering device 50 arranged above the automatic powder control device, and the powder scattering device 50 is electrically connected with the controller.

[0078] The weight of the powder on the powder receiving film 60 is monitored by the automatic powder control device, so that the powder is accurately scattered according to the weight of the powder, and the waste of the powder or the poor powder receiving caused by too much or too little powder on the powder receiving film 60 is avoided.

[0079] The use steps of the embodiment are as follows:

[0080] 1. The wound powder receiving film 60 is led out from the unwinding device and wound on the winding device after passing through the guide wheel, and a downward "V" structure is formed above the film supporting assembly 20;

[0081] 2. The film supporting assembly 20 is switched to the "weighing state" (as shown in Figure 6 ), and the powder scattering device 50 scatters the powder on the powder receiving film 60;

[0082] 3. After the weighing sensor 30 monitors the preset weight (the appropriate weight of the powder), the film supporting assembly 20 is switched to the "non-weighing state" (as shown inFigure 5 The powder-receiving film 60 keeps moving and adsorbing powder;

[0083] 4. According to the moving speed of the powder-receiving film 60 and the powder amount per unit area, the switching frequency of the non-weighing state and the weighing state is set by the controller. In this embodiment, the non-weighing state and the weighing state are set as: the weighing state lasts for 90 seconds→the weighing state lasts for 10 seconds→the weighing state lasts for 90 seconds, and the cycle is repeated.

[0084] In the prior art, the powder amount is controlled according to the running time. This method cannot accurately determine the powder amount on the powder-receiving film 60. In order to ensure sufficient powdering, excessive powdering is caused, which results in powder waste. In order to avoid powder waste, the powder amount is reduced, which may cause insufficient powdering of the powder-receiving film 60.

[0085] In this embodiment, the weight sensor is used to accurately and continuously monitor the weight of the powder on the powder-receiving film 60, and then the powdering control is accurately performed according to the weight of the powder, so as to avoid powder waste or poor powdering caused by excessive or insufficient powder on the powder-receiving film 60.

[0086] For those skilled in the art, other various corresponding changes and modifications can be made according to the technical solutions and concepts described above, and all these changes and modifications should belong to the protection scope of the present application.

Claims

1. An automatic powder control device, characterized by: The automatic powder control device comprises a support assembly (10) and a film supporting assembly (20) connected with the support assembly (10), the support assembly (10) is provided with a weighing sensor (30) connected with an external object, and the weighing sensor (30) is electrically connected with a controller; The support assembly (10) comprises a support side plate (11), and the film supporting assembly (20) is arranged on the inner side of the support side plate (11); The film supporting assembly (20) comprises a film supporting side plate (21), the outer side of the film supporting side plate (21) is provided with a side plate rotating shaft (22) movably sleeved with the support side plate (11), and the side plate rotating shaft (22) is provided with a film supporting assembly driver (40) capable of driving the film supporting assembly (20) to rotate relative to the support side plate (11); and the film supporting assembly driver (40) is electrically connected with the controller. The support side plate (11) is provided with the weighing sensor (30) at both ends thereof; The film supporting side plate (21) is provided with a main roller (23) and a weighing roller (25) in a cylindrical structure between the film supporting side plate (21), and the main roller (23) and the weighing roller (25) are rotatably sleeved with the film supporting side plate (21) respectively; The rotation axis of the side plate rotating shaft (22) does not coincide with the midpoint of the connecting line of the central axes of the main roller (23) and the weighing roller (25); One end of the main roller (23) and the weighing roller (25) is provided with an inductive sheet (28), and the film supporting side plate (21) is provided with a rotation sensor (27) for monitoring the rotation state of the inductive sheet (28) at a position corresponding to the inductive sheet (28); and the rotation sensor (27) is electrically connected with the controller. The inner side of the support side plate (11) is provided with a connecting rod (12) and a baffle (13) in a "V" shape distribution with the side plate rotating shaft (22).

2. The automatic powder control device of claim 1, wherein: The film supporting assembly driver (40) is a rotary motor.

3. The automatic powder control device of claim 1, wherein: At least one side of the main roller (23) is provided with a side roller (24) in a cylindrical structure, and the side roller (24) is rotatably sleeved with the film supporting side plate (21); One end of the side roller (24) is provided with an inductive sheet (28), and the film supporting side plate (21) is provided with a rotation sensor (27) for monitoring the rotation state of the inductive sheet (28) of the side roller (24) at a position corresponding to the inductive sheet (28) of the side roller (24); and the corresponding rotation sensor (27) of the side roller (24) is electrically connected with the controller.

4. The automatic powder control device of claim 1, wherein: The inductive sheet (28) is a non-continuous metal material rotary body, and the rotation sensor (27) is a proximity sensor.

5. The automatic powder control device of claim 1, wherein: The weighing roller (25) is provided with a plurality of powder uniformizing sheets (26), and the powder uniformizing sheets (26) make the surface of the weighing roller (25) present an interlaced convex structure.

6. The automatic powder control device of claim 1 or 5, wherein: One end of the weighing roller (25) is provided with a powder uniformizing driver (29) for driving the weighing roller (25) to rotate.

7. A duster characterised by: The automatic powder control device comprises a support assembly (10) and a film supporting assembly (20) connected with the support assembly (10), the support assembly (10) is provided with a weighing sensor (30) connected with an external object, and the weighing sensor (30) is electrically connected with a controller; The automatic powder control device comprises a support assembly (10) and a film supporting assembly (20) connected with the support assembly (10), the support assembly (10) is provided with a weighing sensor (30) connected with an external object, and the weighing sensor (30) is electrically connected with a controller;

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