Powder scattering mechanism of printing machine

Abstract

The utility model relates to the technical field of digital printing machines, and discloses a printing machine powder scattering mechanism which comprises a powder storage tank, an air pipe, a powder suction piece and a driving mechanism, a powder spraying head assembly is arranged at the lower end of the powder storage tank, a sleeve is connected to the powder outlet end of the powder spraying head assembly in a sleeved mode, and the driving mechanism is used for discharging shimmering powder in the powder storage tank through the powder spraying head assembly. One end of the air pipe penetrates through the outer wall of the sleeve to be arranged in the sleeve, the other end of the air pipe is used for being connected with an air source to drive the shimmering powder to be sprayed out of the sleeve, the powder suction piece is connected to the lower end of the powder storage tank in a sleeved mode and surrounds the powder spraying head assembly and the sleeve, a powder suction hole is formed in the bottom of the powder suction piece, and a powder discharging opening communicated with the powder suction hole is formed in the side wall of the powder suction piece. The powder discharging port is used for being connected with an air suction device, so that redundant dust is sucked in through the powder suction hole and discharged through the powder discharging port. According to the utility model, the situation that the powder spraying head assembly is blocked in the powder scattering process can be avoided, meanwhile, redundant dust is prevented from blocking the spraying head of the jet printing assembly, and the product quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of digital printing machines, in particular to a powder spreading mechanism of a printing machine. Background Art

[0002] In the digital printing process, powdering is often combined to improve the appearance of the product. However, the existing powdering mechanism often clogs the powder spray head assembly, affecting the final quality of the product.

[0003] In addition, in digital printing, it is often the case that both printing and powder spreading processes are performed on one device. Although this improves work efficiency, excess dust may contaminate the printing components during the powder spreading process, causing blockage of the printing nozzle, seriously affecting the printing effect. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a powder spreading mechanism for a printing machine, which avoids the situation where the powder spray head assembly is blocked during the powder spreading process, and at the same time avoids excess dust from clogging the nozzle of the printing assembly, thereby ensuring product quality.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A powder spreading mechanism for a printing press comprises a powder storage tank, an air pipe, a powder suction member and a driving mechanism, wherein a powder spray head assembly is arranged at the lower end of the powder storage tank, a sleeve is sleeved at the powder outlet end of the powder spray head assembly, the driving mechanism is used to discharge the powder in the powder storage tank from the powder spray head assembly, one end of the air pipe passes through the outer wall of the sleeve and is arranged in the sleeve, and the other end is used to connect to an air source to drive the powder to be sprayed out of the sleeve.

[0007] The powder suction component is sleeved on the lower end of the powder storage tank, and surrounds the powder spray head assembly and the sleeve therein; a powder suction hole is provided at the bottom of the powder suction component, and a powder discharge port connected to the powder suction hole is provided on the side wall of the powder suction component; the powder discharge port is used to connect to an air suction device, so as to suck in excess dust from the powder suction hole and discharge it from the powder discharge port.

[0008] Preferably, the powder spray head assembly includes a coaxially arranged lower cover, a powder spray pipe and a powder sieve, the lower cover is connected to the powder storage tank, the upper end of the powder spray pipe passes through the lower cover and is communicated with the interior of the powder storage tank, the sleeve is sleeved on the outer wall of the lower end of the powder spray pipe, and the powder sieve is arranged on the end face of the lower end of the powder spray pipe and is located inside the powder spray pipe.

[0009] Preferably, the driving mechanism comprises a motor disposed in the powder storage tank and a stirring brush disposed in the powder spraying tube, and an output shaft of the motor is connected to the stirring brush.

[0010] Preferably, a connecting rod is provided on the inner wall of the powder storage tank, a motor fixing plate is provided at the other end of the connecting rod, and the motor is fixed on the motor fixing plate.

[0011] Preferably, the driving mechanism is a vibration device, and the vibration device is connected to the powder screening net to make the powder screening net vibrate to achieve powder screening.

[0012] Preferably, the vibration device comprises an electrically connected control panel and a piezoelectric ceramic sheet, the piezoelectric ceramic sheet is arranged at the lower end of the powder spraying tube, a mounting hole is provided in the middle of the piezoelectric ceramic sheet, and the powder sieve is arranged in the mounting hole.

[0013] Preferably, the lower cover comprises a cover body and a ring protruding from the edge of the cover body, the ring is threadedly connected to the powder storage tank, and a sealing gasket is provided between the cover body and the powder storage tank;

[0014] A flange nut and a sealing ring are arranged inside the cover body, the powder spraying tube is threadedly connected to the flange nut, the sealing ring is fitted with the flange nut and is located between the flange nut and the sealing gasket.

[0015] Preferably, the driving mechanism is a vibration device, and the vibration device is connected to the powder storage tank to vibrate the powder storage tank to achieve powder screening.

[0016] Preferably, the powder suction component includes an inner sleeve and an outer sleeve which are coaxially arranged, a powder inlet chamber is formed between the inner sleeve and the outer sleeve, the lower ends of the inner sleeve and the outer sleeve are connected via a powder inlet plate, the powder suction hole is arranged on the powder inlet plate, the side wall of the outer sleeve is provided with a powder discharge pipe, and the port of the powder discharge pipe at one end away from the outer sleeve is the powder discharge port.

[0017] Preferably, the upper end of the powder storage tank is open, and an upper cover is threadedly connected to the opening.

[0018] Compared with the prior art, the powder spreading mechanism of a printing machine in the embodiment of the utility model has the following beneficial effects: by arranging a driving mechanism, the flash powder in the powder storage tank is discharged from the powder spray head assembly, thereby avoiding the situation that the powder spray head assembly is blocked during the powder spreading process; at the same time, a sleeve is connected to the powder outlet end of the spray head assembly, and one end of the air pipe is passed through the outer wall of the sleeve and arranged in the sleeve, and is blown into the nozzle sleeve from the air inlet direction and blown obliquely downward, and negative pressure is formed at the powder spray head assembly by air flow, so that the powder at the powder spray head assembly can be sucked out while blowing, further avoiding the situation that the powder spray head assembly is blocked during the powder spreading process, thereby ensuring product quality.

[0019] In addition, a powder suction piece is sleeved on the lower end of the powder storage tank, and the powder spray head assembly and the sleeve are surrounded therein, and at the same time, a powder suction hole is provided at the bottom of the powder suction piece, and a powder discharge port connected to the powder suction hole is provided on the side wall of the powder suction piece. When working, the powder discharge port is connected to the suction device. Under the action of the suction device, excess dust is sucked into the interior of the powder suction piece through the powder suction hole, and finally discharged from the powder discharge port, thereby avoiding excess dust clogging the nozzle of the printing assembly, and further ensuring the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a powder spreading mechanism of a printing press according to Embodiment 1 of the utility model.

[0021] Figure 2 for Figure 1 sectional view of .

[0022] Figure 3 This is a cross-sectional view of the powder spreading mechanism of a printing press according to the second embodiment of the utility model.

[0023] Among them: 1-powder storage tank, 2-air pipe, 3-powder suction part, 4-sleeve, 5-powder suction hole, 6-powder discharge port, 7-lower cover, 8-powder spraying pipe, 9-powder sieve, 10-motor, 11-stirring brush, 12-connecting rod, 13-motor fixing plate, 14-control board, 15-piezoelectric ceramic sheet, 16-inner sleeve, 17-outer sleeve, 18-powder discharge pipe, 19-upper cover. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment 1

[0028] like Figure 1-2 As shown, a printing press powder spreading mechanism of a preferred embodiment of the utility model comprises a powder storage tank 1, an air pipe 2, a powder suction member 3 and a driving mechanism, wherein a powder spray head assembly is provided at the lower end of the powder storage tank 1, a sleeve 4 is sleeved at the powder outlet end of the powder spray head assembly, and the driving mechanism is used to discharge the flash powder in the powder storage tank 1 from the powder spray head assembly, one end of the air pipe 2 passes through the outer wall of the sleeve 4 and is arranged in the sleeve 4, and the other end of the air pipe 2 is used to connect to an air source to drive the flash powder to be sprayed out of the sleeve 4,

[0029] The powder suction member 3 is sleeved on the lower end of the powder storage tank 1, and surrounds the powder spray head assembly and the sleeve 4 therein; a powder suction hole 5 is provided at the bottom of the powder suction member 3; a powder discharge port 6 connected to the powder suction hole 5 is provided on the side wall of the powder suction member 3; the powder discharge port is used to connect to an air suction device, so as to suck in excess dust from the powder suction hole 5 and discharge it from the powder discharge port 6.

[0030] The powder spreading mechanism of the printing press based on the above technical features is configured with a driving mechanism to discharge the flash powder in the powder storage tank 1 from the powder spray head assembly, thereby avoiding the situation where the powder spray head assembly is blocked during the powder spreading process; at the same time, a sleeve 4 is sleeved on the powder outlet end of the spray head assembly, and one end of the air pipe 2 is passed through the outer wall of the sleeve and arranged in the sleeve, and is blown into the nozzle sleeve from the air inlet direction and blown obliquely downward, and a negative pressure is formed at the powder spray head assembly by the air flow 4, so that the powder at the powder spray head assembly can be sucked out while blowing, further avoiding the situation where the powder spray head assembly is blocked during the powder spreading process, thereby ensuring product quality.

[0031] In addition, a powder suction piece 3 is sleeved on the lower end of the powder storage tank 1, and the powder spray head assembly and the sleeve 4 are surrounded therein, and a powder suction hole 5 is provided at the bottom of the powder suction piece 3, and a powder discharge port 6 connected to the powder suction hole 5 is provided on the side wall of the powder suction piece 3. When working, the powder discharge port 6 is connected to the suction device. Under the action of the suction device, excess dust is sucked into the interior of the powder suction piece 3 through the powder suction hole 5, and finally discharged from the powder discharge port 6, thereby avoiding excess dust clogging the nozzle of the printing assembly, and further ensuring the quality of the product.

[0032] In this embodiment, the cross-section of the powder storage tank 1 is circular, and the upper end of the powder storage tank 1 is open. An upper cover 19 is threadedly connected to the opening, that is, the upper cover 19 and the powder storage tank 1 are detachably connected. When powder needs to be added, the upper cover 19 can be opened, and the upper cover 19 can be closed after adding.

[0033] In this embodiment, the powder spray head assembly includes a coaxially arranged lower cover 7, a powder spray pipe 8, and a powder sieving net 9. The lower cover 7 is connected to the powder storage tank 1. The upper end of the powder spray pipe 8 passes through the lower cover 7 and is connected to the inside of the powder storage tank 1. The sleeve 4 is sleeved on the outer wall of the lower end of the powder spray pipe 8. The powder sieving net 9 is arranged on the end face of the lower end of the powder spray pipe 8 and is located inside the powder spray pipe 8. When sieving powder, under the action of the driving mechanism, the flash powder flows from the powder storage tank 1 into the powder spray pipe 8, and then flows into the sleeve 4 through the powder sieving net 9, and then the powder is sprayed under the action of the airflow of the air pipe 2. The mesh size of the powder sieving net 9 can be selected as needed to ensure the powder spreading effect.

[0034] In this embodiment, the driving mechanism includes a motor 10 disposed in the powder storage tank 1 and a stirring brush 11 disposed in the powder spraying tube 8, and the output shaft of the motor 10 is connected to the stirring brush 11. Specifically, the output shaft of the motor 10 is connected to the rotating shaft through a coupling, and the other end of the rotating shaft is connected to the stirring brush 11. When the motor 10 is started, the stirring brush 11 is driven to brush the powder, so that the flash powder is discharged from the powder sieve 9.

[0035] It should be noted that, due to this arrangement, the stirring brush 11 will directly contact the surface of the powder sieve 9. In order to prevent the powder sieve 9 from falling off under the action of the stirring brush 11, a powder spray head can be provided to fix the powder sieve 9. Specifically, the powder spray head cover is provided at the lower end of the powder spray tube 8, and the powder sieve 9 is provided inside the powder spray head and between the inner wall of the powder spray head and the powder spray tube 8, thereby achieving the fixed installation of the powder sieve 9. The powder spray head is connected to the powder spray tube 8 by threads, and when a different powder sieve 9 needs to be replaced, it is only necessary to disassemble the powder spray head.

[0036] At the same time, in order to facilitate the installation of the motor 10, a connecting rod 12 is provided on the inner wall of the powder storage tank 1, and a motor fixing plate 13 is provided on the other end of the connecting rod 12, and the motor 10 is fixed on the motor fixing plate 13. Preferably, a motor support plate is provided inside the upper cover 19 and between the inner wall of the upper cover 19 and the powder storage tank 1, and the motor support plate is opposite to the motor fixing plate 13 and connected through the connecting rod 12, and the motor 10 is fixed on the motor fixing plate 13. The connecting rod 12 can be a screw rod, and the motor fixing plate 13 is threadedly connected to the screw rod, so as to facilitate the adjustment of the height of the motor fixing plate 13, that is, to achieve the height adjustment of the motor 10. At the same time, a sealing sleeve can be provided between the upper cover 19 and the powder storage tank 1, and the motor support plate is inserted in the sealing sleeve, which not only ensures the sealing between the upper cover 19 and the powder storage tank 1, but also facilitates the installation of the motor support plate.

[0037] In addition, in order to ensure the sealing between the powder spray head assembly and the powder storage tank 1 and the connection stability between the powder spray pipe 8 and the lower cover 7, the lower cover 7 includes a cover body and a ring protruding from the edge of the cover body, the ring is threadedly connected to the powder storage tank 1, and a sealing gasket is provided between the cover body and the powder storage tank 1; a flange nut and a sealing ring are provided inside the cover body, the powder spray pipe is threadedly connected to the flange nut, the sealing ring fits with the flange nut, and is located between the flange nut and the sealing gasket.

[0038] In this embodiment, the powder suction member 3 includes an inner sleeve 16 and an outer sleeve 17 which are coaxially arranged, a powder inlet cavity is formed between the inner sleeve 16 and the outer sleeve 17, the lower ends of the inner sleeve 16 and the outer sleeve 17 are connected through a powder inlet plate, the powder suction hole 5 is arranged on the powder inlet plate, the side wall of the outer sleeve 17 is provided with a powder discharge pipe 18, the end of the powder discharge pipe 18 away from the outer sleeve 17 is the powder discharge port 6, and the upper end of the inner sleeve 16 is connected to the powder storage tank 1. When the powder discharge port 6 is connected to the air suction device, the airflow flows from the powder suction hole 5 into the powder discharge port 6 (such as Figure 2 Under the action of the airflow, the excess dust is completely sucked away, thus avoiding the excess dust from polluting the nozzle of the printing component and ensuring the printing effect of the printing machine.

[0039] Embodiment 2

[0040] like Figure 3 As shown, the difference between this embodiment and the first embodiment is that the driving mechanism is different, and the rest of the structures are the same, specifically:

[0041] In this embodiment, the driving mechanism is a vibration device, which is connected to the powder screening net 9 to vibrate the powder screening net 9 to screen the powder. The powder screening net 9 is made of an elastic sheet to ensure that it will not break during the vibration process.

[0042] For example, the vibration device includes an electrically connected control board 14 and a piezoelectric ceramic sheet 15, wherein the piezoelectric ceramic sheet 15 is arranged at the lower end of the powder spraying tube 8, a mounting hole is arranged in the middle of the piezoelectric ceramic sheet 15, the powder screening net 9 is arranged in the mounting hole, and the control board 14 can be arranged on the upper cover 19. When an electric field is applied to the piezoelectric ceramic sheet 15, the piezoelectric ceramic sheet 15 will produce mechanical deformation, and its strain is proportional to the electric field strength, which is called the inverse piezoelectric effect. The stronger the applied electric field strength, the greater the amplitude of vibration, and the mesh at the mechanical deformation nozzle of the piezoelectric ceramic sheet 15 vibrates to screen powder, thereby achieving powder spraying and the mesh is not easy to be blocked.

[0043] For another example, the vibration device adopts an ultrasonic vibration generator, which uses an ultrasonic generator and a vibrator, and utilizes the vibration of the vibrator to drive the powder screening net 9 to vibrate so as to achieve the purpose of screening powder. At the same time, the vibration can prevent the mesh of the powder screening net 9 from being blocked.

[0044] The vibration device may also be a pneumatic vibrator, a vibration motor, an oscillator, an electromagnetic vibrator, etc.

[0045] Embodiment 3

[0046] The difference between this embodiment and the second embodiment is that the drive mechanism is arranged differently, specifically:

[0047] In this embodiment, the driving device is also a vibration device, but the vibration device is directly connected to the powder storage tank 1 to vibrate the powder storage tank 1 to achieve powder screening. The vibration device can be any existing vibration device, such as the above-mentioned vibration motor, oscillator, electromagnetic vibrator, etc.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A powder spreading mechanism for a printing press, characterized in that: The invention comprises a powder storage tank, an air pipe, a powder suction part and a driving mechanism. A powder spray head assembly is arranged at the lower end of the powder storage tank. A sleeve is sleeved at the powder outlet end of the powder spray head assembly. The driving mechanism is used to discharge the flash powder in the powder storage tank from the powder spray head assembly. One end of the air pipe passes through the outer wall of the sleeve and is arranged in the sleeve, and the other end is used to connect to an air source to drive the flash powder to be sprayed out of the sleeve. The powder suction component is sleeved on the lower end of the powder storage tank, and surrounds the powder spray head assembly and the sleeve therein; a powder suction hole is provided at the bottom of the powder suction component, and a powder discharge port connected to the powder suction hole is provided on the side wall of the powder suction component; the powder discharge port is used to connect to an air suction device, so as to suck in excess dust from the powder suction hole and discharge it from the powder discharge port.

2. The powder spreading mechanism of a printing press according to claim 1, characterized in that: The powder spray head assembly includes a coaxially arranged lower cover, a powder spray pipe and a powder sieve, the lower cover is connected to the powder storage tank, the upper end of the powder spray pipe passes through the lower cover and is connected to the interior of the powder storage tank, the sleeve is sleeved on the outer wall of the lower end of the powder spray pipe, and the powder sieve is arranged on the end face of the lower end of the powder spray pipe and is located inside the powder spray pipe.

3. The powder spreading mechanism of a printing press as claimed in claim 2, characterized in that: The driving mechanism comprises a motor arranged in the powder storage tank and a stirring brush arranged in the powder spraying pipe, and the output shaft of the motor is connected to the stirring brush.

4. The powder spreading mechanism of a printing press as claimed in claim 3, characterized in that: A connecting rod is provided on the inner wall of the powder storage tank, a motor fixing plate is provided on the other end of the connecting rod, and the motor is fixed on the motor fixing plate.

5. The powder spreading mechanism of a printing press as claimed in claim 2, characterized in that: The driving mechanism is a vibration device, and the vibration device is connected to the powder screening net to make the powder screening net vibrate to achieve powder screening.

6. The powder spreading mechanism of a printing press as claimed in claim 5, characterized in that: The vibration device comprises an electrically connected control panel and a piezoelectric ceramic sheet, the piezoelectric ceramic sheet is arranged at the lower end of the powder spraying tube, a mounting hole is arranged in the middle of the piezoelectric ceramic sheet, and the powder sifting net is arranged in the mounting hole.

7. The powder spreading mechanism of a printing press as claimed in claim 2, characterized in that: The lower cover comprises a cover body and a ring protruding from the edge of the cover body, the ring is threadedly connected to the powder storage tank, and a sealing gasket is provided between the cover body and the powder storage tank; A flange nut and a sealing ring are arranged inside the cover body, the powder spraying tube is threadedly connected to the flange nut, the sealing ring is fitted with the flange nut and is located between the flange nut and the sealing gasket.

8. The powder spreading mechanism of a printing press according to any one of claims 1 to 7, characterized in that: The driving mechanism is a vibration device, and the vibration device is connected to the powder storage tank to make the powder storage tank vibrate to achieve powder screening.

9. The powder spreading mechanism of a printing press according to any one of claims 1 to 7, characterized in that: The powder suction component includes an inner sleeve and an outer sleeve which are coaxially arranged, a powder inlet chamber is formed between the inner sleeve and the outer sleeve, the lower ends of the inner sleeve and the outer sleeve are connected via a powder inlet plate, the powder suction hole is arranged on the powder inlet plate, a powder discharge pipe is arranged on the side wall of the outer sleeve, and a port of the powder discharge pipe at one end away from the outer sleeve is the powder discharge port.

10. The powder spreading mechanism of a printing press according to any one of claims 1 to 7, characterized in that: The upper end of the powder storage tank is open, and an upper cover is threadedly connected to the opening.

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