Flat screen printing machine

Abstract

The utility model relates to a flat screen printing machine which comprises a rack, a plurality of color frames arranged in the conveying direction of cloth are arranged on the rack, screen cloth and a scraping printing device are arranged in the color frames, and the scraping printing device comprises a scraping plate and a driving part for driving the scraping plate to reciprocate in the width direction of the cloth. The scraping plate is arranged in the length direction of the cloth, and the lower end of the scraping plate is rotationally connected with a scraping roller parallel to the scraping plate. The scraping roller is arranged at the lower end of the scraping plate and abuts against the screen, sliding friction is changed into rolling friction, and abrasion of the screen and the scraping roller is reduced.

Description

Technical Field

[0001] The present application relates to the field of cloth printing and dyeing, and in particular to a flat screen printing machine. Background Art

[0002] Flat screen printing machines are common production equipment in the textile printing and dyeing industry. The fabric is transported by a rubber conveyor belt (referred to as the guide belt), and multiple flat screens overprint different colors on the fabric. The accuracy of the printing and color overprinting directly affects the appearance and quality grade of the finished fabric.

[0003] The utility model patent with authorization announcement number CN208576273U discloses a flat screen printing machine, including a frame, on which a color frame is fixedly installed along the width direction, a screen and a scraper are installed in the color frame, the scraper includes a scraper and a driving part that drives the scraper to scrape the screen, and a pulp feeding device for adding color paste to the color frame is fixedly installed on one side of the frame.

[0004] The scraper causes great wear on the screen when scraping the screen in the color frame, which shortens the service life of the screen of the color frame and requires frequent replacement, thereby increasing production costs. Utility Model Content

[0005] In order to reduce the wear of scrapers and screens, the present application provides a flat screen printing machine.

[0006] The flat screen printing machine provided in the present application adopts the following technical solution: a flat screen printing machine, comprising a frame, wherein the frame is provided with a plurality of color frames arranged along the transport direction of the fabric, wherein a screen and a scraping device are arranged in the color frame, wherein the scraping device comprises a scraper and a driving member for driving the scraper to reciprocate along the width direction of the fabric, wherein the scraper is arranged along the length direction of the fabric, and the lower end of the scraper is rotatably connected to a scraping roller parallel to the scraper.

[0007] When the flat screen printing machine is working, the fabric is conveyed to the bottom of the color frame. The screen inside the color frame has holes that form a pattern. The hanging printing device scrapes the screen back and forth so that the screen is covered with dye. The dye leaks from the holes to the fabric to dye the fabric with the pattern. The hanging printing device generally uses a scraper to scrape the screen back and forth. The friction between the scraper and the screen is large, which can easily cause wear of the scraper and the screen. By adopting the above technical solution, the driving part drives the scraper to move back and forth, and the scraping roller at the lower end of the scraper scrapes the screen to convert sliding friction into rolling friction, thereby reducing friction and reducing the loss of the screen and the scraping device. The clamping part is used to press the scraper roller against the screen.

[0008] Optionally, the frame is provided with multiple limit plates, which are perpendicular to the fabric conveying direction and located at both ends of the scraper. The limit plates are provided with horizontal positioning grooves that are perpendicular to the fabric conveying direction. Both ends of the scraper in the length direction are provided with limit rods parallel to the scraper, and the limit rods are slidably connected in the positioning grooves.

[0009] When the driving member drives the scraping device to move repeatedly, the scraping roller will separate from the screen due to vibration. By adopting the above technical solution, the positioning groove on the limit plate limits the moving path of the scraper, so that the scraping roller can always be close to the screen.

[0010] Optionally, the positioning groove includes a horizontal groove and two arc grooves, the two arc grooves are respectively connected to the two ends of the horizontal groove and bend upward along the direction from the horizontal groove to the arc groove, and the upper end of the scraper is connected to the driving member through a vertically arranged telescopic rod.

[0011] When scraping the screen, the scraper roller tends to accumulate dye on one side of the roller, leaving less on the other side, which can reduce printing quality. By adopting the above technical solution, the scraper roller moves to one end of the screen and then moves upward along the arc-shaped groove to separate from the screen, allowing the dye to flow to the other side of the scraper roller, improving printing quality. The telescopic rod allows the scraper to move vertically.

[0012] Optionally, the telescopic rod includes a cylinder and a connecting rod, the connecting rod is slidably connected in the cylinder along the vertical direction, the outer wall of the cylinder is connected to the driving member, and the lower end of the connecting rod is connected to the scraper.

[0013] When the scraper moves along the positioning groove, its position in the vertical direction will change. By adopting the above technical solution, when the scraper moves upward along the arc groove, the scraper drives the connecting rod to move upward, and the connecting rod slides in the sleeve along the vertical direction to prevent the scraper and the driving part from getting stuck, so that the equipment can operate normally.

[0014] Optionally, the driving member includes a driving motor, two sprockets and a chain, the two sprockets are arranged directly above the color frame and on both sides of the fabric conveying direction, the chain is connected to the two sprockets, the driving motor is used to drive the sprockets to rotate, and the lower end of the chain is provided with a first connecting block pointing vertically downward, and the lower end of the first connecting block is provided with a horizontal second connecting block, and the second connecting block is connected to the outer wall of the cylinder.

[0015] The driving motor drives the sprocket to rotate, the sprocket drives the chain to move, and the chain drives the telescopic rod to move back and forth. Generally, the chain is directly connected to the telescopic rod, which makes the disassembly and assembly of the cylinder and the connecting rod more troublesome. By adopting the above technical solution, the chain is connected to the side wall of the cylinder through the first connecting block and the second connecting block, so that the upper end of the cylinder is open, and the connecting rod can be inserted into the cylinder from the upper opening of the cylinder, which is convenient for disassembly and installation.

[0016] Optionally, a plurality of limiting grooves along the axial direction of the cylinder are provided on the inner wall of the cylinder, and a plurality of limiting strips along the axial direction of the second rod are provided on the side surface of the connecting rod, and the limiting strips are embedded in the limiting grooves.

[0017] When the telescopic rod drives the scraper to move back and forth, the scraper is not stable enough if it is limited in direction by the positioning groove alone. By adopting the above technical solution, the limit bar is embedded in the limit groove to prevent the connecting rod from rotating, making the equipment more stable.

[0018] Optionally, a groove is formed on the surface of the limiting bar away from the connecting rod, a roller is rotatably connected in the groove and its rolling direction is the axial direction of the connecting rod, and the roller contacts the bottom of the limiting groove.

[0019] When the connecting rod slides in the cylinder, it is easy to wear out due to friction. By adopting the above technical solution, the setting of the roller converts the sliding friction between the connecting rod and the cylinder into rolling friction, reducing friction loss.

[0020] Optionally, a first limiting ring is provided on the inner wall of the cylinder, the first limiting ring is located at the lower end of the cylinder, and the limiting ring is provided with several notches for the limiting bar to pass through. A second limiting ring is provided at the upper end of the connecting rod, and the inner diameter of the first limiting ring is smaller than the outer diameter of the second limiting ring.

[0021] When the connecting rod slides in the cylinder, it may separate from the cylinder due to excessive sliding. By adopting the above technical solution, the second limiting ring at the upper end of the connecting rod and the first limiting ring at the lower end of the cylinder are locked to prevent the connecting rod from separating from the cylinder.

[0022] Optionally, both ends of the roller are rotatably connected to a vertically upward sliding rod, and the sliding rod is slidably connected to the lower end of the scraper in the vertical direction. Both ends of the scraper are provided with clamping parts for clamping the sliding rod.

[0023] As the scraper roller is used, it will be worn and unable to scrape the screen. By adopting the above technical solution, the sliding rod moves up and down to drive the scraper roller to move up and down to the required position. The clamping part is used to clamp the sliding rod to prevent the sliding rod from moving up and down so that the scraper roller can press against the screen.

[0024] Optionally, the clamping member includes a clamping bolt, which is threadedly connected to both ends of the scraper, and the clamping bolt passes through the scraper and clamps the sliding rod.

[0025] By adopting the above technical solution, when the upper and lower positions of the scraper roller need to be adjusted, the operator loosens the clamping bolt so that the sliding rod can move up and down along the sliding groove. After moving to the appropriate position, the operator tightens the clamping bolt to clamp the sliding rod so that the scraper roller stays in the required position.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. Set a scraping roller at the lower end of the scraper to press against the screen, turning sliding friction into rolling friction, reducing the wear of the screen and the scraping roller;

[0028] 2. The setting of the arc groove enables the scraper roller to move upward at one end of the screen, facilitating the flow of dye from one end of the scraper roller to the other end, thereby improving the printing and dyeing quality;

[0029] 3. The position of the scraper roller can be moved up and down so that the scraper roller can be adjusted after being worn so as to continue to press against the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a flat screen printing machine according to an embodiment of the present application.

[0031] Figure 2 It is a structural schematic diagram of a scraper of a flat screen printing machine according to an embodiment of the present application.

[0032] Figure 3 This is a side view of a flat screen printing machine according to an embodiment of the present application.

[0033] Figure 4 It is a structural schematic diagram of a telescopic rod of a flat screen printing machine according to an embodiment of the present application.

[0034] Figure 5 It is a structural schematic diagram of a connecting rod of a flat screen printing machine according to an embodiment of the present application.

[0035] Figure 6 It is a structural schematic diagram of a cylinder of a flat screen printing machine according to an embodiment of the present application.

[0036] Figure 7 It is a cross-sectional view of a telescopic rod of a flat screen printing machine according to an embodiment of the present application.

[0037] Figure numerals: 1. frame; 2. color frame; 3. screen; 4. drive motor; 5. chain; 6. first connecting block; 7. second connecting block; 8. cylinder; 9. connecting rod; 10. limit plate; 11. scraper; 12. limit rod; 13. scraper roller; 14. horizontal groove; 15. arc groove; 18. limit groove; 19. limit bar; 20. second limit ring; 21. roller; 22. first limit ring; 23. clamping bolt; 24. sliding rod; 25. telescopic rod; 26. notch; 27. sprocket. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-7 This application is described in further detail.

[0039] The present application embodiment discloses a flat screen printing machine. Figure 1 A flat screen printing machine includes a frame 1, on which are fixed a plurality of color frames 2 distributed along the cloth transport direction, a screen 3 and a scraping device for hanging and brushing the screen 3 are fixed.

[0040] Reference Figure 1 The scraping device includes a scraper 11 arranged in the same direction as the cloth transport direction and a driving member that drives the scraper 11 to reciprocate along the width direction of the cloth. The lower end of the scraper 11 is rotatably connected to a scraping roller 13 parallel to the scraper 11. When the scraping roller 13 scrapes the screen 3, it is rolling friction, which reduces the wear of the screen 3.

[0041] Reference Figure 1 as well as Figure 2 The two ends of the scraper roller 13 are rotatably connected to a vertically upward sliding rod 24, and the sliding rod 24 is slidably connected to the lower end of the scraper 11 in the vertical direction. Both ends of the scraper 11 in the length direction are provided with clamping parts for positioning the sliding rod 24. The clamping parts include clamping bolts 23, which are threadedly connected to the two ends of the scraper 11 in the length direction and pass through the scraper 11 to clamp the sliding rod 24.

[0042] Reference Figure 1 as well as Figure 3 The frame 1 is provided with multiple limit plates 10, which are arranged perpendicular to the fabric transport direction and are located at both ends of the scraper 11. The limit plates 10 are provided with horizontal positioning grooves perpendicular to the fabric transport direction. The positioning grooves pass through the scraper 11 along the width direction of the scraper 11, and the positioning grooves include a horizontal groove 14 and two arc grooves 15. The two arc grooves 15 are respectively connected to the two ends of the horizontal groove 14 and bend upward along the direction from the horizontal groove 14 to the arc groove 15. The two ends of the scraper 11 in the length direction are provided with limit rods 12 parallel to the scraper 11. The limit rod 12 is slidably connected to the positioning grooves. When the limit rod 12 slides in the horizontal groove 14, the scraping roller 13 is pressed against the screen 3. When the limit rod 12 slides in the arc groove 15, the scraping roller 13 is separated from the screen 3 so that the dye on one side of the scraping roller 13 can flow to the other side of the scraping roller 13, making the dye distribution more uniform and improving the quality of fabric printing and dyeing.

[0043] Reference Figure 1 The driving part includes a driving motor 4, two sprockets 27 and a chain 5. The sprocket 27 is provided on the frame 1 and is located directly above the color frame 2. The two sprockets 27 are distributed on both sides of the cloth conveying direction. The chain 5 is connected to the two sprockets 27. The driving motor 4 is provided on the frame 1 and is used to drive the sprocket 27 to rotate. A first connecting block 6 is fixedly connected to the chain 5 and is vertically downward. A second connecting block 7 is fixedly provided at the lower end of the first connecting block 6. A second connecting block 7 is fixedly provided at one end of the second connecting block 7 away from the first connecting block 6 and is fixedly connected to a telescopic rod 25 that is vertically downward. The lower end of the telescopic rod 25 is connected to the upper end of the scraper 11. The driving motor 4 drives the sprocket 27 to rotate, and the sprocket 27 drives the chain 5 to move. The chain 5 drives the first connecting block 6 to reciprocate back and forth along the width direction of the cloth. The first connecting block 6 in turn drives the scraper 11 to move through the second connecting block 7 and the telescopic rod 25. The position of the scraper 11 in the vertical direction will change when it moves. The length of the telescopic rod 25 changes with the scraper 11 so that the scraper 11 can move smoothly.

[0044] Reference Figure 4 as well as Figure 5 The telescopic rod 25 includes a cylinder 8 and a connecting rod 9. The outer wall of the cylinder 8 is connected to the second connecting block 7. The connecting rod 9 is slidably connected to the cylinder 8 in the vertical direction. Several vertical limit grooves 18 are opened on the inner wall of the cylinder 8. Several vertical limit strips 19 are fixed on the side wall of the connecting rod 9. The limit strips 19 are embedded in the limit grooves 18 to make the connection between the connecting rod 9 and the cylinder 8 more stable. A first limit ring 22 is fixed to the lower end of the cylinder 8, and a second limit ring 20 is fixed to the upper end of the connecting rod 9. The inner diameter of the first limit ring 22 is smaller than the outer diameter of the second limit ring 20, so that the connecting rod 9 will not slide out from the lower end of the cylinder 8 when sliding in the cylinder 8. A notch 26 corresponding to the size and position of the limit strip 19 is opened on the first limit ring 22 so that the limit strip 19 can pass through smoothly. The upper end of the cylinder 8 is open so that the connecting rod 9 can be inserted into the cylinder 8 from top to bottom, which is convenient for disassembly and installation of the connecting rod 9.

[0045] Reference Figure 5 as well as Figure 6 A groove is provided on the surface of the limit bar 19 away from the connecting rod 9, and a roller 21 is rotatably connected in the groove with a rolling direction being the axial direction of the connecting rod 9. The roller 21 contacts the bottom of the limit groove 18, reducing the wear between the limit bar 19 and the limit groove 18.

[0046] The implementation principle of one embodiment of the present application is as follows: the scraping roller 13 rotatably connected to the lower end of the scraper 11 is in rolling friction when brushing the screen 3, which reduces the friction force and reduces the wear of the scraping roller 13 and the screen 3.

[0047] As the equipment is used, when the scraping roller 13 is worn and cannot press against the screen 3, the operator loosens the clamping bolt 23, moves the sliding rod 24 in the vertical direction to make the scraping roller 13 press against the screen 3, and then tightens the clamping bolt 23. The clamping bolt 23 is used to clamp the sliding rod 24 to fix the position of the sliding rod 24.

[0048] When the scraper 11 moves to one end of the color frame 2, the scraper 11 will move upward along the arc groove 15 to separate the scraper roller 13 from the screen 3, so that the dye on one side of the scraper roller 13 can flow to the other side of the scraper roller 13, making the dye more evenly distributed on the screen 3, thereby improving the printing and dyeing quality.

[0049] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A flat screen printing machine, comprising a frame (1), wherein the frame (1) is provided with a plurality of color frames (2) arranged along the conveying direction of the fabric, wherein a screen (3) and a scraping device are provided in the color frames (2), and wherein: The scraping device comprises a scraper (11) and a driving member for driving the scraper (11) to reciprocate along the width direction of the cloth. The scraper (11) is arranged along the length direction of the cloth. The lower end of the scraper (11) is rotatably connected to a scraping roller (13) parallel to the scraper (11).

2. The flat screen printing machine according to claim 1, characterized in that: The frame (1) is provided with a plurality of limit plates (10), the limit plates (10) being perpendicular to the cloth conveying direction and being located at both ends of the scraper (11), the limit plates (10) being provided with horizontal positioning grooves perpendicular to the cloth conveying direction, and limit rods (12) being parallel to the scraper (11) being provided at both ends in the length direction of the scraper (11), the limit rods (12) being slidably connected in the positioning grooves.

3. The flat screen printing machine according to claim 2, characterized in that: The positioning groove comprises a horizontal groove (14) and two arc grooves (15), the two arc grooves (15) are respectively connected to the two ends of the horizontal groove (14) and are bent upward along the direction from the horizontal groove (14) to the arc groove (15), and the upper end of the scraper (11) is connected to the driving member through a vertically arranged telescopic rod (25).

4. The flat screen printing machine according to claim 3, characterized in that: The telescopic rod (25) comprises a cylinder (8) and a connecting rod (9), wherein the connecting rod (9) is slidably connected to the cylinder (8) in a vertical direction, the outer wall of the cylinder (8) is connected to a driving member, and the lower end of the connecting rod (9) is connected to a scraper (11).

5. The flat screen printing machine according to claim 3, characterized in that: The driving member comprises a driving motor (4), two sprockets (27) and a chain (5). The two sprockets (27) are arranged directly above the color frame (2) and on both sides of the fabric conveying direction. The chain (5) is connected to the two sprockets (27). The driving motor (4) is used to drive the sprockets (27) to rotate. A first connecting block (6) extending vertically downward is provided at the lower end of the chain (5). A second connecting block (7) extending horizontally is provided at the lower end of the first connecting block (6). The second connecting block (7) is connected to the outer wall of the cylinder (8).

6. The flat screen printing machine according to claim 4, characterized in that: The inner wall of the cylinder (8) is provided with a plurality of limiting grooves (18) along the axial direction of the cylinder (8), and the side surface of the connecting rod (9) is provided with a plurality of limiting strips (19) along the axial direction of the second rod, and the limiting strips (19) are embedded in the limiting grooves (18).

7. The flat screen printing machine according to claim 6, characterized in that: A groove is formed on the surface of the limiting strip (19) away from the connecting rod (9), and a roller (21) is rotatably connected in the groove, with the rolling direction being the axial direction of the connecting rod (9), and the roller (21) contacts the bottom of the limiting groove (18).

8. The flat screen printing machine according to claim 7, characterized in that: A first limiting ring (22) is provided on the inner wall of the cylinder (8), the first limiting ring (22) is located at the lower end of the cylinder (8), and a plurality of notches (26) are provided on the limiting ring for the limiting strip (19) to pass through. A second limiting ring (20) is provided on the upper end of the connecting rod (9), and the inner diameter of the first limiting ring (22) is smaller than the outer diameter of the second limiting ring (20).

9. The flat screen printing machine according to claim 7, characterized in that: Both ends of the roller are rotatably connected to a vertically upward sliding rod (24), and the sliding rod (24) is slidably connected to the lower end of the scraper (11) in the vertical direction. Clamping parts for clamping the sliding rod (24) are provided at both ends of the scraper (11).

10. The flat screen printing machine according to claim 9, characterized in that: The clamping member comprises a clamping bolt (23), wherein the clamping bolt (23) is threadedly connected to both ends of the scraper (11), and the clamping bolt (23) passes through the scraper (11) and clamps the sliding rod (24).

Images