Ink scraping device and screen printing machine

Abstract

The utility model relates to the technical field of screen printing machines, and discloses an ink scraping device and a screen printing machine with the ink scraping device, which comprises a cross beam, a first adjusting mechanism, a second adjusting mechanism and a third adjusting mechanism which are all arranged on the cross beam, and a first scraper, a second scraper and an oil return knife which are sequentially arranged from left to right, the first adjusting mechanism, the second adjusting mechanism and the third adjusting mechanism are used for driving the first scraper, the second scraper and the oil return knife to ascend and descend and driving the inclination angle and pressure abutting against the silk screen correspondingly. The cross beam drives the first scraper, the second scraper and the oil return knife to complete one-time back-and-forth operation or two-time scraping and printing operation can be completed through the reciprocating operation, the hole plugging efficiency can be effectively improved, the silk-screen time is saved, and the device is suitable for PCBs needing two-time scraping and printing or more than two-time scraping and printing.

Description

Technical Field

[0001] The utility model relates to the technical field of screen printing machines, in particular to an ink scraping device and a screen printing machine. Background Art

[0002] Screen printers typically feature a scraper and a return knife. During the scraping stroke, the scraper plugs the holes with ink, while the return knife is in a high position and in an idle stroke. After the scraper completes its stroke, the return knife descends and rests against the screen. The scraper and return knife reset, and during the return stroke, the return knife scrapes the ink back to its starting position, allowing the scraper to proceed with the next ink plugging operation. This means that during both the scraping and return strokes, the scraper and return knife alternately remain in an idle stroke, resulting in low efficiency. Furthermore, for deep holes in large and thick PCBs, the scraper requires two scraping strokes to complete ink plugging on the PCB, resulting in low screen printing or plugging efficiency. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an ink scraping device that can improve the efficiency of plugging holes.

[0004] The utility model also provides a screen printing machine with the above-mentioned ink scraping device.

[0005] According to an embodiment of the first aspect of the present invention, a scraper device includes a crossbeam and a first adjustment mechanism, a second adjustment mechanism and a third adjustment mechanism all arranged on the crossbeam, and also includes the first scraper, the second scraper and the oil return knife arranged in sequence from left to right. The first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism are respectively used to drive the first scraper, the second scraper and the oil return knife to rise and fall, and the inclination angle and pressure on the silk screen, so that the first scraper divides the ink on the silk screen into two, or the first scraper and the second scraper surround the ink on the silk screen; the crossbeam is used to connect to the silk screen printing machine body.

[0006] It has at least the following beneficial effects:

[0007] Initially, ink is applied to the screen, with the first scraper positioned above the center of the ink. As the first scraper descends, it splits the ink into two, with the two portions located to the left of the first and second scrapers, respectively. As the crossbeam drives the first, second, and oil return blades to move synchronously to the left, each scraper applies appropriate pressure to press the screen against the PCB on the printing table. The first and second scrapers simultaneously perform the scraping operation, completing the secondary plugging process. The oil return blade is now positioned above the screen and ink. After the first and second scrapers complete the plugging process, they both rise to their highest positions. The crossbeam drives the first, second, and oil return blades to continue moving leftward for a distance. Then, the second scraper and oil return blade descend and rest against the screen, placing the two portions of ink to the right of the second scraper and oil return blade, respectively. The crossbeam then drives the first, second, and oil return blades to move synchronously to the right. The second scraper and oil return blade scrape the two portions of ink back to their initial positions, completing the oil return process. The crossbeam drives the first scraper, the second scraper and the oil return knife to complete one back-and-forth operation or reciprocating operation to complete two scraping operations, which can effectively improve the plugging efficiency and save the time of silk screen printing. It is suitable for PCB boards that require two or more scraping operations.

[0008] According to some embodiments of the present invention, the first adjustment mechanism includes two first lifting drive mechanisms and two first adapter groups, the two first lifting drive mechanisms are respectively arranged at the front end and the rear end of the beam, the output ends of the two first lifting drive mechanisms are both downward and respectively connected to the two first adapter groups, and the two first adapter groups are used to adjust the inclination of the first scraper.

[0009] According to some embodiments of the present invention, the output end of the first lifting drive mechanism is provided with a first pin hole, the axial direction of the first pin hole is left and right, the first adapter group includes a first pin shaft, a first U-shaped block, a second U-shaped block and a cantilever beam, and second pin holes are provided on both side walls of the first U-shaped block, the first pin shaft is sequentially passed through one second pin hole, the first pin hole and another second pin hole so that the first U-shaped block can swing around the left and right axial directions, the first U-shaped block is provided with a first hanging hole, the axial direction of the first hanging hole is front and back directions, and second hanging holes are provided on both side walls of the second U-shaped block, the cantilever beam is sequentially passed through one second hanging hole, the first hanging hole and another second hanging hole so that the second U-shaped block can swing around the front and back axial directions, and the second U-shaped block is used to connect the first scraper.

[0010] According to some embodiments of the present invention, an opening is provided on the side wall of the second U-shaped block, which is connected to the second hanging hole to divide the side wall of the second U-shaped block into two elastic parts. The two elastic parts are connected by a first fastener so that the side wall of the second hanging hole can clamp the cantilever beam.

[0011] According to some embodiments of the present invention, the first adjustment mechanism also includes a first mounting plate, and two elastic clamping arms are provided at the lower end of the second U-shaped block. The two elastic clamping arms are connected by a second fastener so that the two elastic clamping arms clamp the first mounting plate, and the first mounting plate is connected to the first scraper through a first clip.

[0012] According to some embodiments of the present invention, one of the elastic clamping arm and the first mounting plate is provided with a positioning ridge, and the other is provided with a positioning groove. The length directions of the positioning ridge and the positioning groove are parallel to the length direction of the first mounting plate, and the positioning ridge and the positioning groove cooperate with each other.

[0013] According to some embodiments of the present invention, the first clamp includes a third U-shaped block and an adjusting member, hooks are provided on both side walls of the third U-shaped block, grooves are provided on two opposite side surfaces of the first scraper, the first mounting plate and the first scraper are located between the two side walls of the third U-shaped block, and the two hooks extend into the two grooves respectively, the adjusting member is threadedly connected to the third U-shaped block, and one end of the adjusting member rests on the side of the first mounting plate away from the first scraper, so that the first scraper is clamped by the first mounting plate and the two hooks.

[0014] According to some embodiments of the present invention, a third pin hole is provided on the side wall of the first hanging hole, a second pin shaft is passed through the third pin hole, the second pin shaft is connected to the cantilever beam to fix the cantilever beam on the first U-shaped block, and an angle dial is provided on the end of the cantilever beam.

[0015] According to some embodiments of the present invention, the third adjustment mechanism includes a second lifting drive mechanism, a third lifting drive mechanism and a second adapter group connected in sequence, the second lifting drive mechanism is connected to the crossbeam through a connecting plate, the second adapter group is connected to a second mounting plate, and the second mounting plate is connected to the oil return knife through a second clip.

[0016] According to the second embodiment of the present invention, the screen printing machine includes a screen printing machine body and an ink scraping device according to the first embodiment of the present invention, wherein the ink scraping device is arranged on the screen printing machine body.

[0017] It has at least the following beneficial effects:

[0018] The screen printing machine has all the beneficial effects brought about by the ink scraping device of the above embodiment, and no further description will be given here.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the longitudinal structure of an embodiment of the utility model;

[0023] Figure 3 This is a structural diagram of the explosion of the first adapter group, the first lifting drive mechanism and the first scraper of an embodiment of the utility model;

[0024] Figure 4 This is a schematic structural diagram of the third adjustment mechanism and the oil return knife in an embodiment of the utility model;

[0025] Figure Number:

[0026] beam 100;

[0027] First adjustment mechanism 200; first lifting drive mechanism 210; first pin hole 211; first adapter assembly 220; first pin shaft 221; first U-shaped block 222; second U-shaped block 223; cantilever beam 224; second pin hole 225; first hanging hole 226; second hanging hole 227; first fastener 228; second fastener 229; first mounting plate 230; first clamp 240; third U-shaped block 241; adjusting member 242;

[0028] Second adjustment mechanism 300;

[0029] Third adjustment mechanism 400; second lifting drive mechanism 410; third lifting drive mechanism 420; second adapter assembly 430; second mounting plate 440; second clamp 450;

[0030] a first scraper 500;

[0031] Second scraper 600;

[0032] Oil return knife 700;

[0033] Second pin 800;

[0034] Angle scale 900. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as limitations on the present invention.

[0037] In the description of this utility model, "a plurality" means more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] Reference Figure 1 and Figure 2 The utility model discloses an ink scraping device, including a crossbeam 100, a first adjustment mechanism 200, a second adjustment mechanism 300, a third adjustment mechanism 400, and a first scraper 500, a second scraper 600 and an oil return knife 700 arranged in sequence from left to right, the first adjustment mechanism 200, the second adjustment mechanism 300 and the third adjustment mechanism 400 are all arranged on the crossbeam 100; the first adjustment mechanism 200, the second adjustment mechanism 300 and the third adjustment mechanism 400 are respectively used to drive the first scraper 500, the second scraper 600 and the oil return knife 700 to rise and fall, as well as the inclination angle and pressure against the silk screen, so that the first scraper 500 divides the ink on the silk screen into two, or the first scraper 500 and the second scraper 600 surround the ink on the silk screen.

[0040] The first adjustment mechanism 200 can independently drive the first scraper 500 to perform lifting and lowering movements. When the first scraper 500 descends, it can rest against the silk screen, and the inclination angle and pressure of the first scraper 500 on the silk screen can be adjusted, that is, the inclination angle and pressure of the first scraper 500 pressing the silk screen on the printing table of the silk screen printer body can be adjusted, so that the first scraper 500 can scrape the ink on the silk screen at a suitable angle and force to ensure the effect of scraping the ink, that is, to ensure the effect of plugging the holes in the PCB board.

[0041] The second adjustment mechanism 300 can independently drive the second scraper 600 to perform lifting and lowering movements. When the second scraper 600 descends, it can rest against the silk screen, and the inclination angle and pressure of the second scraper 600 on the silk screen can be adjusted, that is, the inclination angle and pressure of the second scraper 600 pressing the silk screen on the printing table of the silk screen printer body can be adjusted, so that the second scraper 600 can scrape the ink on the silk screen at a suitable angle and force to ensure the effect of scraping the ink, that is, to ensure the effect of plugging the holes in the PCB board.

[0042] The third adjustment mechanism 400 can independently drive the oil return knife 700 to move up and down. When the oil return knife 700 descends, it can rest against the screen. The third adjustment mechanism 400 can also adjust the inclination angle and pressure of the oil return knife 700 on the screen, so that the oil return knife 700 can scrape all the ink on the screen.

[0043] Initially, ink is placed on the screen, and the first scraper 500 is above the middle of the ink. When the first scraper 500 descends, the ink is divided into two parts, and the two parts of ink are respectively on the left side of the first scraper 500 and the left side of the second scraper 600. When the beam 100 drives the first scraper 500, the second scraper 600 and the oil return knife 700 to move left synchronously, the first scraper 500 and the second scraper 600 both press the screen against the PCB board on the printing table with appropriate pressure. The first scraper 500 and the second scraper 600 perform the scraping operation at the same time to complete the secondary plugging. At this time, the oil return knife 700 is above the screen and ink.

[0044] After the first scraper 500 and the second scraper 600 complete the plugging of the hole synchronously, the first scraper 500 and the second scraper 600 both rise to a high position, and the beam 100 drives the first scraper 500, the second scraper 600 and the oil return knife 700 to continue to move left for a distance, and then the second scraper 600 and the oil return knife 700 both descend and rest against the screen, so that the two parts of ink are respectively on the right side of the second scraper 600 and the oil return knife 700, and then the beam 100 drives the first scraper 500, the second scraper 600 and the oil return knife 700 to move right synchronously, and the second scraper 600 and the oil return knife 700 scrape the two parts of ink back to the initial position, completing the oil return operation.

[0045] The beam 100 drives the first scraper 500, the second scraper 600 and the oil return knife 700 to complete one back and forth operation or reciprocating operation to complete two scraping operations, which can effectively improve the plugging efficiency and save the time of silk screen printing. It is suitable for PCB boards that require two or more scraping operations.

[0046] Of course, the ink scraping device can also use a scraper and an oil return knife like the existing ordinary screen printing machine. The use method of the scraper and the oil return knife of the ordinary screen printing machine is well known and will not be redundantly introduced here.

[0047] It is understood that the crossbeam 100, the oil return blade 700, the first scraper 500 and the second scraper 600 are parallel to each other and perpendicular to the left and right axes. The two side surfaces of the crossbeam 100 face left and right respectively.

[0048] Reference Figure 1 In some embodiments, the first adjustment mechanism 200 includes two first lifting drive mechanisms 210 and two first adapter groups 220. The two first lifting drive mechanisms 210 are respectively arranged at the front end and the rear end of the beam 100. The output ends of the two first lifting drive mechanisms 210 are both downward and respectively connected to the two first adapter groups 220. The two first adapter groups 220 are used to adjust the inclination of the first scraper 500.

[0049] The two first lifting drive mechanisms 210 drive the two first adapter groups 220 and the first scraper 500 to rise and fall, adjusting the height of the first scraper 500 and the pressure applied by the first scraper 500 against the screen and the printing plate. The two first adapter groups 220 adjust the inclination of the first scraper 500, ensuring that the first scraper 500 can completely scrape the ink off the screen, preventing residual ink in areas scraped by the first scraper 500 and preventing the first scraper 500 from reducing its plugging effect in certain areas, thereby ensuring effective plugging.

[0050] It can be imagined that the first lifting drive mechanism 210 is a two-stroke cylinder. After the first lifting drive mechanism 210 drives the two first adapter groups 220 and the first scraper 500 to descend a certain distance, the first scraper 500 can divide the ink into two and press it against the silk screen. At this time, when the first scraper 500 moves to the right, the first scraper 500 can scrape away the ink on the silk screen, that is, complete the oil return; when the first lifting drive mechanism 210 drives the two first adapter groups 220 and the first scraper 500 to descend a certain distance again, the first scraper 500 presses the silk screen against the printing table. At this time, the first scraper 500 moves to the left, and the first scraper 500 can complete the scraping operation.

[0051] Reference Figure 3In some embodiments, a first pin hole 211 is provided at the output end of the first lifting drive mechanism 210, and the axial direction of the first pin hole 211 is left and right. The first adapter group 220 includes a first pin shaft 221, a first U-shaped block 222, a second U-shaped block 223 and a cantilever beam 224. Second pin holes 225 are provided on both side walls of the first U-shaped block 222. The first pin shaft 221 is sequentially passed through one second pin hole 225, the first pin hole 211 and the other second pin hole 225. The first pin shaft 221 serves to hang the first U-shaped block 222 on the output end of the first lifting drive mechanism 210, so that the first U-shaped block 222 can swing around the left and right axial direction, that is, the first U-shaped block 222 can swing around the central axis of the first pin shaft 221 to a certain amplitude.

[0052] A first hanging hole 226 is provided on the first U-shaped block 222, and the axial direction of the first hanging hole 226 is the front-to-back direction. A second hanging hole 227 is provided on both side walls of the second U-shaped block 223. The cantilever beam 224 is sequentially passed through one second hanging hole 227, the first hanging hole 226 and the other second hanging hole 227, so that the second U-shaped block 223 can swing around the front-to-back axis. The second U-shaped block 223 is used to connect the first scraper 500.

[0053] The second U-shaped block 223 is hung on the first U-shaped block 222 through the cantilever beam 224. The second U-shaped block 223 can carry the first scraper 500 to swing around the front and rear axes, that is, to change the left or right tilt angle of the first scraper 500.

[0054] The two first lifting drive mechanisms 210 are respectively arranged at the front end and the rear end of the beam 100, and the two first U-shaped blocks 222 are respectively connected to the output ends of the two first lifting drive mechanisms 210 distributed in the front and rear through two first pin shafts 221, and the two second U-shaped blocks 223 distributed in the front and rear are respectively cooperated with the front and rear ends of the first scraper 500, so that the height of the front and rear ends of the first scraper 500 can be adjusted, that is, the height difference between the front and rear ends of the first scraper 500 can be adjusted, and finally the lower surface of the first scraper 500 can be completely attached to the silk screen.

[0055] Reference Figure 3In some embodiments, an opening is formed in the side wall of the second U-shaped block 223, which is connected to the second hanging hole 227 to divide the side wall of the second U-shaped block 223 into two elastic parts. The two elastic parts are connected by a first fastener 228. When the first fastener 228 is tightened, the two elastic parts approach each other, that is, the two areas on the side wall of the second hanging hole 227 opposite to the two elastic parts approach each other, causing the second hanging hole 227 to shrink, thereby allowing the side wall of the second hanging hole 227 to clamp the cantilever beam 224; when the first fastener 228 is loosened, the two elastic parts are reset, causing the second hanging hole 227 to expand, thereby allowing the side wall of the second hanging hole 227 to loosen the cantilever beam 224.

[0056] In some embodiments, the first adjustment mechanism 200 also includes a first mounting plate 230, and two elastic clamping arms are provided at the lower end of the second U-shaped block 223, and the two elastic clamping arms are connected by a second fastener 229. When the second fastener 229 is tightened, the two elastic clamping arms approach each other, so that the two elastic clamping arms clamp the first mounting plate 230, and when the second fastener 229 is loosened, the two elastic clamping arms can be reset, and the two elastic clamping arms release the first mounting plate 230.

[0057] The first mounting plate 230 is connected to the first scraper 500 via the first clip 240 . The first clip 240 can realize quick connection and detachment of the first scraper 500 and the first mounting plate 230 .

[0058] Reference Figure 3 In some embodiments, one of the elastic clamping arm and the first mounting plate 230 is provided with a positioning ridge, and the other is provided with a positioning groove. The length directions of the positioning ridge and the positioning groove are parallel to the length direction of the first mounting plate 230. The positioning ridge and the positioning groove cooperate with each other to realize rapid positioning and assembly between the elastic clamping arm and the first mounting plate 230, and when tightening the second fastener 229, the first mounting plate 230 is prevented from offsetting on the two elastic clamping arms.

[0059] In some embodiments, the first clamp 240 includes a third U-shaped block 241 and an adjusting member 242. Hooks are provided on both side walls of the third U-shaped block 241. Grooves are provided on two opposite side surfaces of the first scraper 500. The first mounting plate 230 and the first scraper 500 are located between the two side walls of the third U-shaped block 241, and the two hooks extend into the two grooves respectively. The adjusting member 242 is threadedly connected to the third U-shaped block 241, and one end of the adjusting member 242 abuts against the first mounting plate 230. 0 is on the side away from the first scraper 500. When the adjusting member 242 is tightened, the adjusting member 242 moves the first mounting plate 230 toward the two hooks. The first mounting plate 230 presses the first scraper 500 toward the two hooks, so that the first scraper 500 is clamped by the first mounting plate 230 and the two hooks. When the adjusting member 242 is loosened, the first mounting plate 230 no longer presses the first scraper 500, and the two hooks release the first scraper 500, thereby realizing the removal of the first scraper 500.

[0060] It is understandable that the first fastener 228, the second fastener 229 and the adjusting member 242 are all screws. A rotary handle is provided on the other end of the adjusting member 242.

[0061] Reference Figure 3 In some embodiments, a third pin hole is provided on the sidewall of the first hanging hole 226. A second pin shaft 800 is inserted into the third pin hole. The second pin shaft 800 is connected to the cantilever beam 224. The second pin shaft 800 secures the cantilever beam 224 to the first U-shaped block 222, preventing the cantilever beam 224 from deflecting or rotating. An angle dial 900 is provided on the end of the cantilever beam 224. When the second U-shaped block 223 rotates about the central axis of the cantilever beam 224, the second U-shaped block 223 and the first scraper 500 deflect relative to the angle dial 900. The reading on the angle dial 900 indicates the leftward or rightward tilt angle of the second U-shaped block 223 and the first scraper 500.

[0062] It can be known that the structure, installation method and use method of the second adjustment mechanism 300 are the same as those of the first adjustment mechanism 200, and a redundant introduction is not given here.

[0063] Reference Figure 4 In some embodiments, the third adjustment mechanism 400 includes a second lifting drive mechanism 410, a third lifting drive mechanism 420, and a second adapter group 430 connected in sequence. The second lifting drive mechanism 410 is connected to the beam 100 through a connecting plate. The second adapter group 430 is connected to a second mounting plate 440. The second mounting plate 440 is connected to the oil return knife 700 through a second clip 450.

[0064] The second lifting drive mechanism 410 can drive the third lifting drive mechanism 420, the second adapter group 430, the second mounting plate 440, the second clamp 450 and the oil return knife 700 to rise and fall. The third lifting drive mechanism 420 can drive the second adapter group 430, the second mounting plate 440, the second clamp 450 and the oil return knife 700 to rise and fall, so that the lifting stroke of the oil return knife 700 is larger and more precise lifting height control can be achieved.

[0065] The structure, installation method, and usage of the second adapter set 430 are the same as those of the first adapter set 220. The structure, installation method, and usage of the second clip 450 are the same as those of the first clip 240, and are not described here redundantly.

[0066] The utility model discloses a screen printing machine, comprising a screen printing machine body and the above-mentioned ink scraping device. The ink scraping device is arranged on the screen printing machine body.

[0067] The screen printing machine has all the beneficial effects brought about by the ink scraping device of the above embodiment, and no further description will be given here.

[0068] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A scraping device, characterized in that: include: A crossbeam (100) is used to connect to the screen printing machine body; a first adjustment mechanism (200), a second adjustment mechanism (300), and a third adjustment mechanism (400), wherein the first adjustment mechanism (200), the second adjustment mechanism (300), and the third adjustment mechanism (400) are all provided on the crossbeam (100); The first scraper (500), the second scraper (600) and the oil return knife (700) are arranged in sequence from left to right, and the first adjustment mechanism (200), the second adjustment mechanism (300) and the third adjustment mechanism (400) are respectively used to drive the first scraper (500), the second scraper (600) and the oil return knife (700) to rise and fall, and to adjust the inclination angle and pressure on the screen, so that the first scraper (500) divides the ink on the screen into two, or the first scraper (500) and the second scraper (600) surround the ink on the screen.

2. The ink scraping device according to claim 1, characterized in that: The first adjustment mechanism (200) comprises two first lifting drive mechanisms (210) and two first adapter groups (220), the two first lifting drive mechanisms (210) being respectively arranged at the front end and the rear end of the beam (100), the output ends of the two first lifting drive mechanisms (210) both facing downward and respectively connected to the two first adapter groups (220), and the two first adapter groups (220) being used to adjust the inclination of the first scraper (500).

3. The ink scraping device according to claim 2, characterized in that: The output end of the first lifting drive mechanism (210) is provided with a first pin hole (211), the axial direction of the first pin hole (211) is the left-right direction, the first adapter group (220) includes a first pin shaft (221), a first U-shaped block (222), a second U-shaped block (223) and a cantilever beam (224), and second pin holes (225) are provided on both side walls of the first U-shaped block (222). The first pin shaft (221) is sequentially passed through one of the second pin holes (225), the first pin hole (211) and the other second pin hole (225), so that the first U-shaped block (222) can be lifted and lowered. The block (222) is capable of swinging around the left and right axes. The first U-shaped block (222) is provided with a first hanging hole (226), and the axis of the first hanging hole (226) is the front-back direction. Second hanging holes (227) are provided on both side walls of the second U-shaped block (223). The cantilever beam (224) is sequentially passed through one of the second hanging holes (227), the first hanging hole (226), and the other second hanging hole (227), so that the second U-shaped block (223) can swing around the front-back axis. The second U-shaped block (223) is used to connect the first scraper (500).

4. The ink scraping device according to claim 3, characterized in that: The side wall of the second U-shaped block (223) is provided with an opening, the opening being in communication with the second hanging hole (227) so as to divide the side wall of the second U-shaped block (223) into two elastic parts, the two elastic parts being connected by a first fastener (228) so that the side wall of the second hanging hole (227) can clamp the cantilever beam (224).

5. An ink scraping device according to claim 3 or 4, characterized in that: The first adjustment mechanism (200) further comprises a first mounting plate (230), and the lower end of the second U-shaped block (223) is provided with two elastic clamping arms, and the two elastic clamping arms are connected by a second fastener (229) so that the two elastic clamping arms clamp the first mounting plate (230), and the first mounting plate (230) is connected to the first scraper (500) via a first clamp (240).

6. The ink scraping device according to claim 5, characterized in that: One of the elastic clamping arm and the first mounting plate (230) is provided with a positioning ridge, and the other is provided with a positioning groove, the length directions of the positioning ridge and the positioning groove are both parallel to the length direction of the first mounting plate (230), and the positioning ridge and the positioning groove cooperate with each other.

7. The ink scraping device according to claim 5, characterized in that: The first clamp (240) includes a third U-shaped block (241) and an adjusting member (242), hooks are provided on both side walls of the third U-shaped block (241), grooves are provided on two opposite side surfaces of the first scraper (500), the first mounting plate (230) and the first scraper (500) are located between the two side walls of the third U-shaped block (241), and the two hooks extend into the two grooves respectively, the adjusting member (242) is threadedly connected to the third U-shaped block (241), and one end of the adjusting member (242) abuts against the side of the first mounting plate (230) away from the first scraper (500), so that the first scraper (500) is clamped by the first mounting plate (230) and the two hooks.

8. An ink scraping device according to claim 3 or 4, characterized in that: A third pin hole is provided on the side wall of the first hanging hole (226), a second pin shaft (800) is passed through the third pin hole, and the second pin shaft (800) is connected to the cantilever beam (224) to fix the cantilever beam (224) on the first U-shaped block (222). An angle dial (900) is provided on the end of the cantilever beam (224).

9. The ink scraping device according to claim 1, characterized in that: The third adjustment mechanism (400) includes a second lifting drive mechanism (410), a third lifting drive mechanism (420), and a second adapter group (430) connected in sequence. The second lifting drive mechanism (410) is connected to the crossbeam (100) via a connecting plate. The second adapter group (430) is connected to a second mounting plate (440). The second mounting plate (440) is connected to the oil return knife (700) via a second clamp (450).

10. Screen printing machine, characterized in that, It comprises a screen printing machine body and an ink scraping device according to any one of claims 1 to 9, wherein the ink scraping device is arranged on the screen printing machine body.

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