Printing ink supply device of screen printing machine

Abstract

The ink supply device is applied to the technical field of printing and comprises an ink storage barrel, the ink storage barrel is fixed to a machine head of the screen printing machine through a fixing part, the top of the ink storage barrel is of an opening structure, an ink outlet is formed in the bottom of the ink storage barrel, and a barrel cover is arranged at the opening structure of the top of the ink storage barrel. A connecting air pipe is arranged on the cylinder cover and penetrates through the cylinder cover, one end of the connecting air pipe extends into the oil storage cylinder, and the other end of the connecting air pipe is connected with an air pressure control device; a printing ink adding opening is formed in the position, close to the opening structure, of a barrel body of the ink storage barrel, an oil filling pipeline is communicated between an oil outlet of the printing ink supply box and the printing ink adding opening, and a printing ink pump is arranged on the oil filling pipeline. According to the printing ink supply device of the screen printing machine, the convenience of adding printing ink into the ink storage cylinder can be remarkably improved.

Description

Technical Field

[0001] The present application relates to the field of printing technology, and in particular to an ink supply device for a screen printing machine. Background Art

[0002] Screen printing machine is a kind of printing machine, which is a machine that uses screen printing plate to print. It is a kind of printing machine. It uses screen printing plate to evenly apply ink to the printed matter to achieve the purpose of printing text and images. Screen printing machine has the advantages of high printing quality, high efficiency, environmental protection and energy saving, and wide application range.

[0003] In the related art, in order to ensure that the printing work of the screen printing machine can proceed normally, an ink supply device is usually set on the screen printing machine to cooperate with the screen printing machine to ensure the stable supply of ink during the printing process and ensure the quality and efficiency of the printed product. For example, the Chinese utility model patent with patent number CN201820278802.2 and the name of the screen printing machine and its ink adding device is to configure an ink adding device on the screen printing machine. The oil reservoir of the ink adding device is detachably fixed on the head of the screen printing machine. The oil outlet at the bottom of the oil reservoir is connected to the oil outlet conduit. A sealing cover is set on the top of the oil reservoir and the sealing cover is connected to the connecting air pipe. The air pressure in the oil storage cavity is controlled by the air pressure control device, so as to control the ink output on demand and on time. The sealing cover is connected to the oil reservoir by a buckle, and the oil reservoir is fixed to the head by a fixed retaining spring. When it is necessary to add ink to the oil reservoir, it is necessary to open the sealing cover and even remove the oil reservoir from the head. The operation is relatively cumbersome, which brings inconvenience to the printing work. Utility Model Content

[0004] In order to improve the defect in the prior art that the operation of adding ink into the oil reservoir is relatively complicated, the present application provides an ink supply device for a screen printing machine.

[0005] The present application provides an ink supply device for a screen printing machine, which adopts the following technical solution:

[0006] An ink supply device for a screen printing machine, comprising:

[0007] An oil storage cylinder, the oil storage cylinder is fixed on the head of the screen printing machine through a fixing component, the top of the oil storage cylinder is set to an open structure, the bottom of the oil storage cylinder is set with an ink outlet, a cylinder cover is set at the opening structure at the top of the oil storage cylinder, a connecting air pipe is set on the cylinder cover, the connecting air pipe passes through the cylinder cover, one end of the connecting air pipe extends into the inside of the oil storage cylinder and the other end is connected to the air pressure control device, and the ink outlet at the bottom of the oil storage cylinder is connected to an ink output pipe;

[0008] The ink supply box has an ink adding port on its body near the opening structure, a refueling pipeline is connected between the oil outlet of the ink supply box and the ink adding port, and an ink pump is arranged on the refueling pipeline.

[0009] By adopting the above technical solution, ink is stored inside the ink supply box. When ink needs to be added to the oil storage cylinder, the staff does not need to open the cylinder cover on the oil storage cylinder nor remove the oil storage cylinder from the head of the screen printing machine. It only needs to start the ink pump, and the ink is extracted from the ink supply box and transported to the oil storage cylinder through the ink pump, so as to complete the work of adding ink to the oil storage cylinder. The convenience of this operation can be significantly improved compared with the existing technology.

[0010] Optionally, a refueling on-off valve is provided on the refueling pipeline near the ink adding port.

[0011] By adopting the above technical solution, the refueling on-off valve needs to be opened when adding ink to the oil storage cylinder, and when the air pressure control device controls the ink to be output from the ink output pipe, the refueling on-off valve needs to be closed to ensure that the ink in the oil storage cylinder can only be output from the ink output pipe.

[0012] Optionally, the placement height of the ink supply box is lower than the height of the oil storage cylinder, and an ink discharge port is provided on the body of the oil storage cylinder near the ink outlet. An oil return pipeline is connected between the oil return port of the ink supply box and the ink discharge port, and an oil return opening and closing valve is provided on the oil return pipeline near the ink discharge port.

[0013] By adopting the above technical solution, the oil return on-off valve is in the open state only when the oil storage cylinder is emptied. When the ink in the oil storage cylinder needs to be discharged to the ink supply tank, the oil return on-off valve is opened, and the ink in the oil storage cylinder can rely on its own gravity to flow back to the ink supply tank through the oil return pipeline.

[0014] Optionally, the ink supply box is provided with an ink inlet, and the ink inlet is provided with an end cover for sealing; the ink supply box is also provided with a stirring assembly, and the stirring assembly includes a stirring motor, a stirring shaft and a stirring impeller, the stirring motor is fixed on the box wall of the ink supply box, the stirring shaft and the motor shaft of the stirring motor are coaxially connected, the stirring impeller is fixed on the stirring shaft, and the stirring shaft and the stirring impeller are both located inside the ink supply box.

[0015] By adopting the above technical solution, the purpose of arranging a stirring assembly on the ink supply box is to prevent the ink from settling after being left standing for too long, thereby affecting the uniformity of the ink and the printing effect.

[0016] Optionally, an external thread structure is provided on the outer wall of the cylinder cover, and an internal thread structure is provided on the inner wall of the oil storage cylinder, and the cylinder cover and the oil storage cylinder are threadedly fixed by means of thread cooperation between the external thread structure and the internal thread structure.

[0017] By adopting the above technical solution, the threaded structure can make the cylinder cover and the oil storage cylinder detachable, making the oil storage cylinder more convenient and flexible when in use.

[0018] Optionally, a through hole for the connecting air pipe to pass through is provided in the middle portion of the tube cover, an annular groove is provided on the hole wall along the periphery, a clamping ring is provided on the outer wall of the connecting air pipe, and the clamping ring is adapted to be clamped in the annular groove.

[0019] By adopting the above technical solution, the matching setting of the clamping ring and the ring groove not only has a fixing effect on the connecting air pipe but also a sealing effect. On the other hand, when the cylinder cover is rotated, the connecting air pipe will not always rotate with the cylinder cover, thereby ensuring that the connecting air pipe is not affected.

[0020] Optionally, an online cleaning port is provided on the cylinder cover at one side of the through hole, and a sealing plug is provided on the online cleaning port.

[0021] By adopting the above technical solution, when the inside of the oil storage cylinder needs to be cleaned, the ink in the oil storage cylinder is first drained through the ink discharge port, and then the refueling on-off valve and the oil return on-off valve are all closed, and clean water is injected into the oil storage cylinder through the online cleaning port for cleaning, and the cleaning wastewater is finally discharged from the ink output pipe connected to the ink outlet.

[0022] Optionally, the fixing component includes a U-shaped clamp and a fixing block arranged on the head of the screen printing machine, the side of the fixing block facing the oil storage cylinder is arranged to be an arc surface adapted to the outer wall of the oil storage cylinder, the U-shaped clamp is arranged on the outer wall of the oil storage cylinder and cooperates with the arc surface of the fixing block to clamp the oil storage cylinder, and the two ends of the U-shaped clamp are fixed to the fixing block by bolts.

[0023] By adopting the above technical solution, the fixing component composed of the U-shaped clamp and the fixing block has the effect of fixing the oil storage cylinder on the head of the screen printing machine.

[0024] In summary, this application includes the following beneficial technical effects:

[0025] 1. Ink is stored in the ink supply box. When ink needs to be added to the oil storage cylinder, the staff does not need to open the cylinder cover on the oil storage cylinder and does not need to remove the oil storage cylinder from the head of the screen printing machine. It only needs to open the refueling on-off valve and close the oil return on-off valve, and then start the ink pump. The ink is extracted from the ink supply box and transported to the oil storage cylinder through the ink pump, thereby completing the work of adding ink to the oil storage cylinder. The convenience of operation of this application can be significantly improved compared with the prior art.

[0026] 2. The ink supply box can provide a sufficient amount of ink source for the oil storage cylinder, and the purpose of setting a stirring component on the ink supply box is to prevent the ink from settling after standing for too long, which will affect the uniformity of the ink and the printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of an ink supply device for a screen printing machine according to an embodiment of the present application.

[0028] Figure 2 A partial schematic diagram of an ink storage cartridge is shown for an ink supply device according to an embodiment of the present application.

[0029] Figure 3 This is a partial structural cross-sectional view of the oil storage cylinder according to an embodiment of the present application.

[0030] Figure 4 It is a schematic structural diagram of the ink supply box according to an embodiment of the present application.

[0031] Figure numerals: 1. Oil storage cylinder; 100. Ink outlet; 101. Ink adding port; 102. Ink discharge port; 2. Cylinder cover; 200. Through hole; 201. Online cleaning port; 3. Ink supply box; 300. Ink inlet; 4. Stirring assembly; 400. Stirring motor; 401. Stirring shaft; 402. Stirring impeller; 5. Fixed component; 500. U-shaped clamp; 501. Fixed block; 6. Connecting air pipe; 7. Ink output pipe; 8. Refueling pipeline; 9. Ink pump; 10. Refueling on-off valve; 11. Oil return pipeline; 12. Oil return on-off valve; 13. End cover; 14. Sealing plug; 15. Oil outlet on-off valve. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The present application embodiment discloses an ink supply device for a screen printing machine, referring to Figure 1-2The ink supply device of the screen printing machine includes an oil storage cylinder 1 and an ink supply box 3. The oil storage cylinder 1 is configured as a cylinder structure with an oil storage cavity having a cylindrical outer contour. The top of the oil storage cylinder 1 is configured as an open structure and is closed by a cylinder cover 2. The outer surface of the cylinder cover 2 has an external thread, and the inner surface of the oil storage cylinder 1 has an internal thread. The external thread on the outer surface of the cylinder cover 2 and the internal thread on the inner surface of the oil storage cylinder 1 are mutually adapted thread relationships, so the cylinder cover 2 can be screwed on the opening structure at the top of the oil storage cylinder 1 to achieve the effect of fixing the cylinder cover 2 and closing the opening structure at the top of the oil storage cylinder 1. An ink outlet 100 is provided at the center of the bottom of the oil storage cylinder 1. The ink outlet 100 is connected to an ink output tube 7 made of rubber material. The ink output tube 7 can be fixed on the ink return knife of the screen printing machine, and a manual oil outlet opening and closing valve 15 is installed at the ink outlet 100, and the opening and closing of the ink outlet 100 is controlled by the oil outlet opening and closing valve 15.

[0034] The oil storage cylinder 1 is fixed to the head of the screen printing machine through the fixing component 5. The fixing component 5 includes a U-shaped clamp 500 and a fixing block 501 with one side set to an arc surface. The side of the fixing block 501 facing away from the arc surface is a plane, and the plane side of the fixing block 501 is fixedly connected to the head of the screen printing machine. The arc surface of the fixing block 501 and the outer wall of the oil storage cylinder 1 are mutually adapted. Therefore, the U-shaped clamp 500 is sleeved on the outer wall of the oil storage cylinder 1. The U-shaped clamp 500 cooperates with the arc surface of the fixing block 501 to clamp the oil storage cylinder 1 tightly. Then, bolts are used to fix the two ends of the U-shaped clamp 500 and the fixing block 501, so that the oil storage cylinder 1 can be fixed to the head of the screen printing machine more firmly, so that the oil storage cylinder 1 can be used stably.

[0035] Reference Figure 2-3 The screen printing ink supply device of the present application also includes an air pressure control device, which can be a glue dispenser controller (not shown in the attached figure) used on the glue dispenser. The glue dispenser controller controls the air pressure in the oil storage cylinder 1 by the air pressure control method, that is, when the oil storage cylinder 1 is controlled to be positive pressure, the pressure forces the ink to be output from the ink output pipe 7 to the screen printing plate, and when the oil storage cylinder 1 is controlled to be negative pressure, the ink stops outputting, thereby controlling the ink output on demand and on time. Of course, the oil outlet on-off valve 15 needs to be opened when in use. The glue dispenser controller and the inside of the oil storage cylinder 1 are connected through a rubber connecting air pipe 6, and a through hole 200 for the connecting air pipe 6 to fit through is opened in the center of the cylinder cover 2.

[0036] Before use, the ink supply device for the screen printing machine of the present application has a sufficient amount of ink stored in the oil storage cylinder 1. When in use, the oil outlet on-off valve 15 is opened first, and the dispenser controller is used to control the oil storage cylinder 1 to have a positive pressure. The pressure will force the ink to be output from the ink output pipe 7 to the screen printing plate. After use, the dispenser controller is used to control the oil storage cylinder 1 to have a negative pressure. For safety reasons, the oil outlet on-off valve 15 is closed.

[0037] Reference Figure 3 It should also be noted that an annular groove can be provided along the hole wall of the through hole 200, and a clamping ring can be integrally provided along the outer wall of the connecting air pipe 6. The clamping ring can be adapted to be clamped in the annular groove to fix the connecting air pipe 6 and also seal the through hole 200. In addition, when rotating the operating cylinder cover 2, the operator only needs to fix the connecting air pipe 6 with his hands, and the connecting air pipe 6 will not rotate with the cylinder cover 2, thereby ensuring that the connecting air pipe 6 is not affected when the operating cylinder cover 2 is rotated.

[0038] Reference Figure 1-2 When the ink in the oil storage cylinder 1 is used up and needs to be refilled, ink can be refilled into the oil storage cylinder 1 through the ink supply box 3. The ink supply box 3 can be placed on the ground or fixed at a suitable position of the screen printing machine, but it is necessary to ensure that the height of the ink supply box 3 is lower than the height of the oil storage cylinder 1. A sufficient amount of spare ink is stored in the ink supply box 3 on a daily basis. The top wall of the ink supply box 3 is provided with an ink inlet 300, and the ink inlet 300 is usually closed by an end cap 13. The end cap 13 can have an internal thread on the inner surface and an external thread on the outer surface of the ink inlet 300, and the end cap 13 is fixed on the ink inlet 300 by means of a threaded structure.

[0039] An ink adding port 101 is provided near the top opening structure of the oil storage cylinder 1, and an ink discharging port 102 is provided near the bottom ink outlet 100 of the oil storage cylinder 1. The ink adding port 101 is connected to the oil outlet of the ink supply box 3 through a rubber filling pipe 8, and the ink discharging port 102 is connected to the oil return port of the ink supply box 3 through a rubber return pipe 11. The ink adding port 101 is used to add ink to the oil storage cylinder 1, and the ink discharging port 102 is used to discharge the remaining unused ink in the oil storage cylinder 1 so that the ink flows back to the ink supply box 3 for storage to avoid unnecessary waste. Figure 4An ink pump 9 is also provided between the ink adding port 101 and the oil outlet of the ink supply box 3. The ink pump 9 is connected in series with the refueling pipeline 8. The ink can be extracted from the ink supply box 3 and transported to the oil storage cylinder 1 through the ink pump 9, so as to complete the work of adding ink to the oil storage cylinder 1. In addition, a manual refueling on-off valve 10 is installed at the ink adding port 101 and a manual oil return on-off valve 12 is installed at the ink discharge port 102.

[0040] Reference Figure 1-2 When adding ink to the oil storage cylinder 1, close the oil outlet opening and closing valve 15 at the ink outlet 100 and the oil return opening and closing valve 12 at the ink discharge port 102, open the oil filling opening and closing valve 10 at the ink addition port 101, start the ink pump 9, and use the ink pump 9 to extract the ink from the ink supply box 3 and transport it to the oil storage cylinder 1, so as to complete the work of adding ink to the oil storage cylinder 1. After the ink is added, close the oil filling opening and closing valve 10. When the screen printing machine does not work for a period of time and the ink in the oil storage cylinder 1 needs to be emptied, keep the oil filling opening and closing valve 10 and the oil outlet opening and closing valve 15 in the closed state, and only need to open the oil return opening and closing valve 12, so that the ink in the oil storage cylinder 1 can flow back to the ink supply box 3 through the oil return pipeline 11 by its own gravity. Of course, when the oil storage cylinder 1 is used in conjunction with the dispensing machine controller, that is, when the ink in the oil storage cylinder 1 is output from the ink output pipe 7 to the screen printing plate under pressure, the oil filling on-off valve 10 and the oil return on-off valve 12 need to be closed.

[0041] Reference Figure 4 For the ink supply box 3, a stirring assembly 4 can be provided on the ink supply box 3. The stirring assembly 4 includes a stirring motor 400, a stirring shaft 401 and a stirring impeller 402. The stirring motor 400 is installed and fixed at the center of the top wall of the ink supply box 3. The stirring shaft 401 and the stirring impeller 402 are both located inside the ink supply box 3. The stirring shaft 401 and the motor shaft of the stirring motor 400 are coaxially connected. The stirring impeller 402 is fixed on the stirring shaft 401. The purpose of providing the stirring assembly 4 on the ink supply box 3 is to prevent the ink from settling after being left still for too long, thereby affecting the uniformity of the ink and the printing effect.

[0042] Reference Figure 3As a preferred embodiment, an online cleaning port 201 may be provided on the cylinder cover 2, and the online cleaning port 201 is usually sealed with a silicone plug 14. When the inside of the oil storage cylinder 1 needs to be cleaned, the ink in the oil storage cylinder 1 may be emptied by using the ink discharge port 102, and then the oil filling on-off valve 10 and the oil return on-off valve 12 are all closed, and the oil outlet on-off valve 15 is opened, and clean water is injected into the oil storage cylinder 1 through the online cleaning port 201 for cleaning, and the cleaning wastewater is finally discharged from the ink output pipe 7 connected to the ink outlet 100. Of course, a basin or other utensils may be used to catch the cleaning wastewater to avoid dirtying the screen printing machine.

[0043] The implementation principle of the screen printing machine ink supply device disclosed in the embodiment of the present application is as follows: before use, the screen printing machine ink supply device of the present application has a sufficient amount of ink stored in the oil storage cylinder 1 in advance. When in use, the oil outlet on-off valve 15 is opened first, and the oil filling on-off valve 10 and the oil return on-off valve 12 are closed. The dispenser controller is used to control the oil storage cylinder 1 to have a positive pressure, and the pressure will force the ink to be output from the ink output pipe 7 to the screen printing plate. After use, the dispenser controller is used to control the oil storage cylinder 1 to have a negative pressure. For safety reasons, the oil outlet on-off valve 15 is closed.

[0044] When adding ink to the oil storage cylinder 1, close the oil outlet opening and closing valve 15 at the ink outlet 100 and the oil return opening and closing valve 12 at the ink discharge port 102, open the oil filling opening and closing valve 10 at the ink addition port 101, start the ink pump 9, and use the ink pump 9 to extract the ink from the ink supply box 3 and transport it to the oil storage cylinder 1, so as to complete the work of adding ink to the oil storage cylinder 1. After the ink is added, close the oil filling opening and closing valve 10. When the screen printing machine does not work for a period of time and the ink in the oil storage cylinder 1 needs to be emptied, keep the oil filling opening and closing valve 10 and the oil outlet opening and closing valve 15 in the closed state, and only need to open the oil return opening and closing valve 12, so that the ink in the oil storage cylinder 1 can flow back to the ink supply box 3 through the oil return pipeline 11 by its own gravity.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An ink supply device for a screen printing machine, characterized in that: include: An oil storage cylinder (1), the oil storage cylinder (1) being fixed to the head of a screen printing machine via a fixing component (5), the top of the oil storage cylinder (1) being arranged in an open structure, the bottom of the oil storage cylinder (1) being arranged with an ink outlet (100), a cylinder cover (2) being arranged at the opening structure at the top of the oil storage cylinder (1), a connecting air pipe (6) being arranged on the cylinder cover (2), the connecting air pipe (6) penetrating the cylinder cover (2), one end of the connecting air pipe (6) extending into the interior of the oil storage cylinder (1) and the other end being connected to an air pressure control device, the ink outlet (100) at the bottom of the oil storage cylinder (1) being connected to an ink output pipe (7); An ink supply box (3), wherein an ink adding port (101) is provided on the body of the oil storage cylinder (1) near the opening structure, a refueling pipeline (8) is connected between the oil outlet of the ink supply box (3) and the ink adding port (101), and an ink pump (9) is provided on the refueling pipeline (8).

2. The ink supply device for a screen printer according to claim 1, characterized in that: A refueling on-off valve (10) is provided on the refueling pipeline (8) near the ink adding port (101).

3. The ink supply device for a screen printer as claimed in claim 1, characterized in that: The placement height of the ink supply box (3) is lower than the height of the oil storage cylinder (1); an ink discharge port (102) is provided on the body of the oil storage cylinder (1) near the ink outlet (100); an oil return pipeline (11) is connected between the oil return port of the ink supply box (3) and the ink discharge port (102); and an oil return on-off valve (12) is provided on the oil return pipeline (11) near the ink discharge port (102).

4. The ink supply device for a screen printer as claimed in claim 1, characterized in that: The ink supply box (3) is provided with an ink inlet (300), and the ink inlet (300) is provided with an end cover (13) for sealing; the ink supply box (3) is also provided with a stirring assembly (4), and the stirring assembly (4) comprises a stirring motor (400), a stirring shaft (401) and a stirring impeller (402); the stirring motor (400) is fixed on the box wall of the ink supply box (3), the stirring shaft (401) and the motor shaft of the stirring motor (400) are coaxially connected, the stirring impeller (402) is fixed on the stirring shaft (401), and the stirring shaft (401) and the stirring impeller (402) are both located inside the ink supply box (3).

5. The ink supply device for a screen printer as claimed in claim 1, characterized in that: An external thread structure is provided on the outer wall of the cylinder cover (2), and an internal thread structure is provided on the inner wall of the oil storage cylinder (1). The cylinder cover (2) and the oil storage cylinder (1) are threadedly fixed by means of thread cooperation between the external thread structure and the internal thread structure.

6. The ink supply device for a screen printer as claimed in claim 1, characterized in that: A through hole (200) is provided in the middle of the cylinder cover (2) for the connecting air pipe (6) to pass through, an annular groove is provided on the hole wall of the through hole (200) along the circumference, and a clamping ring is provided on the outer wall of the connecting air pipe (6), and the clamping ring is adapted to be clamped in the annular groove.

7. The ink supply device for a screen printing machine as claimed in claim 6, characterized in that: An online cleaning port (201) is provided on the cylinder cover (2) at one side of the through hole (200), and a sealing plug (14) is provided on the online cleaning port (201).

8. The ink supply device for a screen printing machine according to claim 1, characterized in that: The fixing component (5) comprises a U-shaped clamp (500) and a fixing block (501) arranged on the head of the screen printing machine; the fixing block (501) is arranged with a curved surface matching the outer wall of the oil storage cylinder (1) on one side facing the oil storage cylinder (1); the U-shaped clamp (500) is arranged on the outer wall of the oil storage cylinder (1) and cooperates with the curved surface of the fixing block (501) to clamp the oil storage cylinder (1); and both ends of the U-shaped clamp (500) are fixed to the fixing block (501) by bolts.

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