Printing device with interval adjusting function

Abstract

The invention discloses a printing device with a spacing adjusting function, the printing device comprises a bottom frame, a transfer printing mechanism, an ink scraping mechanism, a silk screen mechanism, a printing mechanism and a control panel, the transfer printing mechanism comprises a vertical guide rail, a horizontal guide rail and a first sliding table, the first sliding table is fixedly connected with the ink scraping mechanism, the silk screen mechanism comprises a side frame and a screen plate, and the screen plate is fixedly connected with the horizontal guide rail. The printing mechanism comprises a double-station guide rail and a vertical guide rail, the double-station guide rail and the control panel are fixedly connected with the bottom frame, the side frame is fixedly connected with the horizontal guide rail and the screen plate, and the transfer printing mechanism, the ink scraping mechanism and the printing mechanism are connected with the control panel through electric signals. The invention relates to the technical field of printing equipment, a planar to-be-printed piece can be rapidly printed, the distance of multiple times of printing on the same workpiece can be adjusted through different displacement distances of a second sliding table along a double-station guide rail, the net distance is corrected through self-inspection, printing defects are avoided, and the printing precision and efficiency are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of printing equipment, in particular to a printing device with a spacing adjustment function. Background Art

[0002] As a highly flexible and adaptable printing device, screen printing has found widespread application in a wide range of fields, including textiles, packaging, electronics, and advertising. These devices offer significant advantages. First, they can print on a wide range of materials and irregular surfaces, transcending the limitations of materials and substrate shapes. Second, their ink thickness can be adjusted to meet specific printing requirements, such as 3D and fluorescent effects. With the continuous advancement and development of technology, screen printing technology is steadily moving towards automation, high precision, and environmental friendliness, better meeting the demands of modern industrial production.

[0003] In current screen printing technology, the main method is to scrape the screen with a squeegee, which transfers the ink through the screen to the surface of the printed object. However, as the squeegee scrapes across the screen, the inherent fluidity of the ink makes it difficult to achieve uniform distribution, leading to quality issues such as color loss and blurring of the printed pattern. Furthermore, when the distance between the screen and the workpiece is too large, or the scraping speed is too fast, the printed pattern can also become blurred, color-missing, and uneven. Conversely, if the screen spacing is too small, the printed pattern can become overly colored, or even produce an oily halo. These problems severely impact the quality of the finished screen-printed product and urgently need to be addressed through technological improvements and process optimization. Summary of the Invention

[0004] The object of the present invention is to provide a printing device with a spacing adjustment function to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A printing device with a spacing adjustment function includes a base frame, a printing mechanism, an ink scraping mechanism, a screen mechanism, a printing mechanism and a control panel, the printing mechanism includes a vertical guide rail, a horizontal guide rail and a first slide, the first slide is fixedly connected to the ink scraping mechanism, the screen mechanism includes a side frame and a screen plate, the printing mechanism includes a double-station guide rail, the vertical guide rail, the double-station guide rail and the control panel are all fixedly connected to the base frame, the side frame is fixedly connected to the horizontal guide rail and the screen plate, the printing mechanism, the ink scraping mechanism and the printing mechanism are all connected to the control panel through electrical signals.

[0006] The present invention is an automated printing device for various flat materials, which places a workpiece to be printed on a printing mechanism, which absorbs the workpiece and moves it along a double-station guide rail to a printing station below a screen, pours ink on the screen, and the horizontal guide rail moves downward along the vertical guide rail to bring the screen close to the top of the workpiece. The ink scraping mechanism moves horizontally along the horizontal guide rail, and the ink scraping mechanism scrapes the screen at a constant speed at a certain angle, and the ink is transferred to the workpiece through the screen. After the ink scraping is completed, the horizontal guide rail moves upward along the vertical guide rail to reset, and the ink scraping mechanism moves back along the horizontal guide rail to reset, and the ink return knife scrapes the remaining ink back to the starting end of the screen to prepare for the next printing. The spacing between multiple prints on the same workpiece can be adjusted by adjusting the displacement of the workpiece along the double-station guide rail. The printing mechanism detects whether the printed product has problems such as missing prints and blurring, analyzes the pattern and feeds back an electrical signal to the control panel, and the control panel sends an electrical signal to the printing mechanism and the ink scraping mechanism to automatically correct the screen spacing and ink scraping speed, thereby improving printing accuracy.

[0007] Furthermore, the printing mechanism also includes a sliding rod, a first cylinder and a rotary motor. The first cylinder is fixedly connected to the vertical guide rail, the sliding rod is fixedly connected to the output end of the first cylinder and the horizontal guide rail, the horizontal guide rail is slidingly connected to the vertical guide rail, the rotary motor is fixedly connected to the horizontal guide rail, the output end of the rotary motor is connected to the first slide through a belt drive, the first slide is slidingly connected to the horizontal guide rail, the first cylinder and the rotary motor are both connected to the control panel through electrical signals, and the ink scraping mechanism includes an assembly frame, and the first slide is fixedly connected to the assembly frame.

[0008] The printing mechanism absorbs the workpiece and moves it to the printing station under the screen. The output end of the first cylinder pushes the horizontal guide rail to slide along the vertical guide rail through the sliding rod, so that the screen is close to the top of the workpiece. The output torque of the rotary motor drives the first slide to slide along the horizontal guide rail through the belt. The first slide drives the scraping mechanism to move horizontally along the horizontal guide rail. The scraping mechanism scrapes the screen at a certain angle and a uniform speed. The ink is transferred to the workpiece through the screen. The electrical signal of the control panel is fed back to the first cylinder to adjust the distance between the horizontal guide rail, the screen and the workpiece, and the electrical signal is fed back to the rotary motor to adjust the movement speed of the scraping mechanism.

[0009] Furthermore, the ink scraping mechanism also includes a servo cylinder, a sliding frame, a scraper mechanism and an ink return knife. There are two groups of servo cylinders and sliding frames. The two groups of servo cylinders and sliding frames are arranged on both sides of the assembly frame. The servo cylinder is fixedly connected to the assembly frame, and the output end of the servo cylinder is fixedly connected to the sliding frame. The sliding frame is slidingly connected to the assembly frame. The scraper mechanism includes a clamp, one group of sliding frames is fixedly connected to the clamp, and the other group of sliding frames is fixedly connected to the ink return knife. The servo cylinder is connected to the control panel through electrical signals.

[0010] The output torque of the rotary motor drives the first slide to slide along the horizontal guide rail through the belt, and the first slide drives the assembly frame to move horizontally along the horizontal guide rail. When scraping ink, a group of servo cylinder output ends push a group of sliding frames to slide downward along the assembly frame, so that the scraper mechanism contacts the upper surface of the screen, and the scraper mechanism scrapes the screen at a certain angle and a uniform speed, and the ink is transferred to the workpiece through the screen. After the ink scraping is completed, the horizontal guide rail moves upward and resets along the vertical guide rail, and the scraper mechanism moves upward and resets, and the output end of another group of servo cylinders pushes the ink return knife to move downward and contact the upper surface of the screen, and the assembly frame moves back along the horizontal guide rail and resets, and the ink return knife scrapes the remaining ink back to the starting end of the screen.

[0011] Furthermore, the scraper mechanism also includes a rubber plate and a liquid return mechanism, the liquid return mechanism includes a front end cover and a rear end cover, and the clamp is fixedly connected to the rubber plate, the front end cover, and the rear end cover.

[0012] When scraping ink, a group of servo cylinder output ends push a group of sliding frames to slide downward along the assembly frame, so that the rubber plate contacts the upper surface of the screen, and the rubber plate scrapes across the screen at a certain angle and at a constant speed.

[0013] Furthermore, the fixture is provided with a bottom channel, and the rubber plate is provided with liquid collecting holes and flow channels. There are several groups of liquid collecting holes, and several groups of liquid collecting holes are provided at both ends of the rubber plate. Several groups of liquid collecting holes are evenly distributed in a triangular array along the side wall of the rubber plate. The number of liquid collecting holes decreases equidistantly towards each other along the two ends of the rubber plate, and the flow channels are connected to the bottom channel and the liquid collecting holes.

[0014] When the rubber plate scrapes across the screen at a constant speed at a certain angle, ink accumulates on the rubber plate. Due to the uniform movement of the rubber plate, the ink flows to both sides of the rubber plate. The ink flowing to both sides of the rubber plate flows back out of the fixture through the liquid collecting holes, flow channels, and bottom channels on both sides and is evenly distributed on the sides of the rubber plate, avoiding excessive ink flow to both sides, resulting in uneven smearing when scraping across the screen, causing blurred and colorless printing. The number of liquid collecting holes set at the end away from the center of the rubber plate is the largest. As the speed of the rubber plate increases, the flow rate of the ink accumulated on the rubber plate to both sides increases, and the ink quickly flows to both sides of the rubber plate and is absorbed by the liquid collecting holes with a larger number.

[0015] Furthermore, the liquid return mechanism also includes a servo motor, a gear rod and a triangular rotor. The servo motor is fixedly connected to the front end cover, and the output end of the servo motor is fixedly connected to the gear rod. The fixture is also provided with side holes and a rotary cavity. The triangular rotor is provided with an inner gear ring. The gear rod is engaged with the tooth surface of the inner gear ring, and the triangular rotor is in contact with the rotary cavity. There are several groups of side holes, and the several groups of side holes are linearly evenly distributed along the axis of the gear rod.

[0016] The servo motor outputs fixed-axis torque to the gear rod, which meshes with the tooth surface of the inner gear ring through the gear rod. The triangular rotor rotates eccentrically in the rotating chamber. The triangular rotor squeezes the air in the rotating chamber to generate negative pressure. The ink flowing to both sides of the rubber plate is drawn into the rotating chamber through the liquid collecting holes, flow channels and bottom channels on both sides. As the triangular rotor continues to rotate eccentrically, the ink flows back through the linearly evenly distributed side holes on the side wall of the fixture after the triangular rotor rotates one circle and is evenly distributed on the side of the rubber plate.

[0017] Furthermore, the printing mechanism also includes an inspection platform, an adsorption mechanism and a displacement cylinder. There are two groups of double-station guide rails, and the two groups of double-station guide rails are arranged on both sides of the inspection platform. The double-station guide rails are provided with an upper slide groove and a side slide groove. The inspection platform is slidingly connected to the upper slide groove, and the displacement cylinder is fixedly connected to the double-station guide rail. The adsorption mechanism includes a second slide, and the second slide is fixedly connected to the output end of the displacement cylinder. The second slide is slidingly connected to the side slide groove. The inspection platform and the displacement cylinder are both connected to the control panel through electrical signals.

[0018] The output end of the displacement cylinder drives the second slide to move along the side slide to the printing station under the screen. The spacing between multiple prints on the same workpiece can be adjusted by adjusting the displacement distance of the second slide along the double-station guide rail. After printing is completed, the inspection platform slides along the upper slide to the top of the second slide to detect the printing condition of the workpiece. When the printed pattern is blurred, color-missing, or unevenly printed, the reason may be that the screen spacing is too large or the ink scraping speed is too fast; when the printed pattern color block is too heavy or the pattern is oily, the reason may be that the screen spacing is too small. The inspection platform analyzes the pattern and feeds back an electrical signal to the control panel.

[0019] Furthermore, the adsorption mechanism also includes an adsorption plate and a vacuum suction nozzle. The adsorption plate is fixedly connected to the second slide and the vacuum suction nozzle. There are air holes on the adsorption plate. There are several groups of air holes and vacuum suction nozzles. Several groups of air holes are evenly distributed in a rectangular array on the adsorption plate, and several groups of vacuum suction nozzles are evenly distributed linearly along the side wall of the adsorption plate.

[0020] Before printing, place the flat workpiece on the surface of the adsorption plate. Several groups of linearly evenly distributed vacuum nozzles are used to continuously evacuate the adsorption plate. Several groups of rectangular arrays of evenly distributed air holes adsorb the flat workpiece to prevent the printed object from shifting during printing and causing printing failure.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention designs a scraper mechanism, when the rubber plate scrapes across the screen at a certain angle and a uniform speed, the ink accumulates on the rubber plate and flows to both sides, and the ink flowing to both sides passes through the liquid collecting holes, flow channels, and bottom channels on both sides, flows back out from the fixture, and is evenly distributed on the sides of the rubber plate, avoiding excessive ink flow to both sides, resulting in uneven smearing when scraping across the screen, causing blurred and colorless printing, and the number of liquid collecting holes set at the end away from the center of the rubber plate is the largest. As the speed of the rubber plate increases, the flow rate of the ink accumulated on the rubber plate to both sides increases, and the ink quickly flows to both sides of the rubber plate and is absorbed by a larger number of liquid collecting holes; the present invention designs a liquid return mechanism, which outputs a fixed-axis torque to the gear rod through a servo motor, which meshes with the tooth surface of the inner gear ring through the gear rod, and the triangular rotor rotates eccentrically in the rotary chamber. The triangular rotor squeezes the air in the rotary chamber to generate negative pressure, and the ink flowing to both sides of the rubber plate passes through the liquid collecting holes, flow channels, and bottom channels on both sides. The ink is drawn into the rotary chamber, and as the triangular rotor rotates continuously eccentrically, the ink flows back through the linearly evenly distributed side holes on the side wall of the fixture after the triangular rotor rotates one circle, and is evenly distributed on the side of the rubber plate; the present invention designs a printing mechanism, and after printing is completed, the visual inspection platform slides along the upper slide groove to above the second slide to detect the printing condition of the workpiece. When the printed pattern is blurred, color-missing, or unevenly printed, the reason may be that the screen spacing is too large or the ink scraping speed is too fast; when the printed pattern color blocks are too heavy or the pattern is oily, the reason may be that the screen spacing is too small. The visual inspection platform analyzes the pattern and feeds back an electrical signal to the control panel, and the control panel sends an electrical signal to automatically correct the screen spacing and ink scraping speed to improve printing accuracy; the present invention can quickly print flat workpieces to be printed, and the spacing between multiple prints on the same workpiece can be adjusted by adjusting the distance between multiple prints through the second slide along the double-station guide rail. The screen spacing can be corrected through self-inspection to avoid printing defects, thereby greatly improving printing accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the printing mechanism of the present invention; Figure 3 This is a schematic structural diagram of the ink scraping mechanism of the present invention; Figure 4 It is a schematic structural diagram of the scraper mechanism of the present invention; Figure 5 A partial cross-sectional view of the scraper mechanism of the present invention; Figure 6 for Figure 5 A magnified schematic diagram of a local area A; Figure 7 It is a structural schematic diagram of the printing mechanism of the present invention; Figure 8 for Figure 7 A magnified schematic diagram of local B.

[0023] In the figure: 1. Base frame; 2. Printing mechanism; 21. Vertical guide rail; 22. Slide rod; 23. First cylinder; 24. Horizontal guide rail; 25. Rotary motor; 26. First slide; 3. Ink scraping mechanism; 31. Assembly frame; 32. Servo cylinder; 33. Slide frame; 34. Scraper mechanism; 35. Ink return blade; 36. Clamp; 361. Side hole; 362. Rotary chamber; 363. Bottom channel; 37. Rubber plate; 371. Liquid collection hole; 372. Flow channel; 38. Liquid return mechanism; 38 1. Servo motor; 382. Front cover; 383. Rear cover; 384. Gear rod; 385. Triangular rotor; 3851. Inner ring gear; 4. Screen mechanism; 41. Side frame; 42. Screen plate; 5. Printing mechanism; 51. Dual-station guide rail; 511. Upper slide; 512. Side slide; 52. Inspection platform; 53. Adsorption mechanism; 531. Second slide; 532. Adsorption plate; 5321. Air hole; 533. Vacuum nozzle; 54. Displacement cylinder; 6. Control panel. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figure 1 、 Figure 2 、 Figure 7 As shown, the present invention provides a technical solution of a printing device with a spacing adjustment function, including a base frame 1, a printing mechanism 2, an ink scraping mechanism 3, a screen mechanism 4, a printing mechanism 5 and a control panel 6. The printing mechanism 2 includes a vertical guide rail 21, a horizontal guide rail 24 and a first slide 26, the first slide 26 is fixedly connected to the ink scraping mechanism 3, the screen mechanism 4 includes a side frame 41 and a screen plate 42, the printing mechanism 5 includes a double-station guide rail 51, the vertical guide rail 21, the double-station guide rail 51 and the control panel 6 are all fixedly connected to the base frame 1, the side frame 41 is fixedly connected to the horizontal guide rail 24 and the screen plate 42, and the printing mechanism 2, the ink scraping mechanism 3 and the printing mechanism 5 are all connected to the control panel 6 through electrical signals.

[0026] The present invention is an automated printing device for various flat materials. The workpiece to be printed is placed on a printing mechanism 5. The printing mechanism 5 absorbs the workpiece and moves along a double-station guide rail 51 to the printing station below the screen 42. An oil film is poured on the screen 42. The horizontal guide rail 24 moves downward along the vertical guide rail 21 to make the screen 42 close to the top of the workpiece. The scraping mechanism 3 moves horizontally along the horizontal guide rail 24. The scraping mechanism 3 scrapes the screen 42 at a certain angle and at a constant speed. The ink is transferred to the workpiece through the screen 42. After the scraping is completed, the horizontal guide rail 24 moves along the vertical guide rail 21. The vertical guide rail 21 moves upward and resets, the ink scraping mechanism 3 moves back along the horizontal guide rail 24 and resets, and the ink return knife 35 scrapes the remaining ink back to the starting end of the screen 42 to prepare for the next printing. By moving the workpiece along the double-station guide rail 51 at different positions, the spacing between multiple prints on the same workpiece can be adjusted. The printing mechanism 5 detects whether the printed matter has problems such as missing prints and blurring, analyzes the pattern and feeds back an electrical signal to the control panel 6, and the control panel 6 sends an electrical signal to the printing mechanism 2 and the ink scraping mechanism 3 to automatically correct the screen spacing and ink scraping speed to improve printing accuracy.

[0027] like Figure 2 As shown, the printing mechanism 2 also includes a slide rod 22, a first cylinder 23 and a rotary motor 25. The first cylinder 23 is fixedly connected to the vertical guide rail 21. The slide rod 22 is fixedly connected to the output end of the first cylinder 23 and the horizontal guide rail 24. The horizontal guide rail 24 is slidably connected to the vertical guide rail 21. The rotary motor 25 is fixedly connected to the horizontal guide rail 24. The output end of the rotary motor 25 is connected to the first slide 26 through a belt drive. The first slide 26 is slidably connected to the horizontal guide rail 24. The first cylinder 23 and the rotary motor 25 are both connected to the control panel 6 through electrical signals. The ink scraping mechanism 3 includes an assembly frame 31. The first slide 26 is fixedly connected to the assembly frame 31.

[0028] The printing mechanism 5 adsorbs the workpiece and moves it to the printing station below the screen 42. The output end of the first cylinder 23 pushes the horizontal guide rail 24 to slide along the vertical guide rail 21 through the slide rod 22, so that the screen 42 is close to the top of the workpiece. The rotary motor 25 outputs torque to drive the first slide 26 to slide along the horizontal guide rail 24 through the belt. The first slide 26 drives the scraping mechanism 3 to move horizontally along the horizontal guide rail 24. The scraping mechanism 3 scrapes the screen 42 at a certain angle and at a uniform speed. The ink is transferred to the workpiece through the screen 42. The electrical signal of the control panel 6 is fed back to the first cylinder 23 to adjust the distance between the horizontal guide rail 24, the screen 42 and the workpiece, and the electrical signal is fed back to the rotary motor 25 to adjust the movement speed of the scraping mechanism 3.

[0029] like Figure 3As shown, the ink scraping mechanism 3 also includes a servo cylinder 32, a sliding frame 33, a scraper mechanism 34 and an ink return knife 35. The servo cylinder 32 and the sliding frame 33 are each provided with two groups. The two groups of servo cylinders 32 and sliding frames 33 are both arranged on both sides of the assembly frame 31. The servo cylinder 32 is fixedly connected to the assembly frame 31, and the output end of the servo cylinder 32 is fixedly connected to the sliding frame 33. The sliding frame 33 is slidingly connected to the assembly frame 31. The scraper mechanism 34 includes a clamp 36. One group of sliding frames 33 is fixedly connected to the clamp 36, and the other group of sliding frames 33 is fixedly connected to the ink return knife 35. The servo cylinder 32 is connected to the control panel 6 through electrical signals.

[0030] The output torque of the rotary motor 25 drives the first slide 26 to slide along the horizontal guide rail 24 through the belt, and the first slide 26 drives the assembly frame 31 to move horizontally along the horizontal guide rail 24. When scraping ink, the output ends of a group of servo cylinders 32 push a group of sliding frames 33 to slide downward along the assembly frame 31, so that the scraper mechanism 34 contacts the upper surface of the screen 42. The scraper mechanism 34 scrapes the screen 42 at a certain angle and a uniform speed, and the ink is transferred to the workpiece through the screen 42. After the ink scraping is completed, the horizontal guide rail 24 moves upward and resets along the vertical guide rail 21, and the scraper mechanism 34 moves upward and resets. The output ends of another group of servo cylinders 32 push the ink return knife 35 to move downward and contact the upper surface of the screen 42. The assembly frame 31 moves back and resets along the horizontal guide rail 24, and the ink return knife 35 scrapes the remaining ink back to the starting end of the screen 42.

[0031] like Figure 4 As shown, the scraper mechanism 34 further includes a rubber plate 37 and a liquid return mechanism 38 . The liquid return mechanism 38 includes a front end cover 382 and a rear end cover 383 . The clamp 36 is fixedly connected to the rubber plate 37 , the front end cover 382 , and the rear end cover 383 .

[0032] When scraping ink, the output ends of a group of servo cylinders 32 push a group of sliding frames 33 to slide downward along the assembly frame 31, so that the rubber plate 37 contacts the upper surface of the screen plate 42, and the rubber plate 37 scrapes the screen plate 42 at a certain angle and at a constant speed.

[0033] like Figure 4 、 Figure 5 As shown, the clamp 36 is provided with a bottom channel 363, and the rubber plate 37 is provided with a liquid collecting hole 371 and a flow channel 372. The liquid collecting holes 371 are provided in several groups, and several groups of liquid collecting holes 371 are provided at both ends of the rubber plate 37. The several groups of liquid collecting holes 371 are evenly distributed in a triangular array along the side wall of the rubber plate 37. The number of liquid collecting holes 371 decreases equidistantly towards each other along the two ends of the rubber plate 37, and the flow channel 372 is connected to the bottom channel 363 and the liquid collecting holes 371.

[0034] When the rubber plate 37 scrapes across the screen 42 at a constant speed at a certain angle, ink accumulates on the rubber plate 37. Due to the constant speed movement of the rubber plate 37, the ink flows to the two sides of the rubber plate 37. The ink flowing to the two sides of the rubber plate 37 flows back out of the clamp 36 through the liquid collecting holes 371, flow channels 372, and bottom channels 363 on both sides, and is evenly distributed on the sides of the rubber plate 37, so as to prevent excessive ink from flowing to the two sides, resulting in uneven smearing when scraping across the screen 42, causing blurred and colorless printing. The liquid collecting holes 371 are arranged at the end away from the center of the rubber plate 37 with the largest number. As the moving speed of the rubber plate 37 increases, the flow rate of the ink accumulated on the rubber plate 37 to the two sides increases, and the ink quickly flows to the two sides of the rubber plate 37 and is absorbed by the liquid collecting holes 371 with a larger number.

[0035] like Figure 4 、 Figure 5 、 Figure 6 As shown, the liquid return mechanism 38 also includes a servo motor 381, a gear rod 384 and a triangular rotor 385. The servo motor 381 is fixedly connected to the front end cover 382, and the output end of the servo motor 381 is fixedly connected to the gear rod 384. The fixture 36 is also provided with a side hole 361 and a rotary chamber 362. The triangular rotor 385 is provided with an inner gear ring 3851. The gear rod 384 engages with the tooth surface of the inner gear ring 3851. The triangular rotor 385 is in contact with the rotary chamber 362. The side holes 361 are provided in several groups, and the several groups of side holes 361 are linearly evenly distributed along the axis of the gear rod 384.

[0036] The servo motor 381 outputs a fixed-axis torque to the gear rod 384. Through the meshing of the gear rod 384 with the tooth surface of the inner ring gear 3851, the triangular rotor 385 rotates eccentrically in the rotary chamber 362. The triangular rotor 385 squeezes the air in the rotary chamber 362 to generate negative pressure. The ink flowing toward the sides of the rubber plate 37 is drawn into the rotary chamber 362 through the liquid collection holes 371, flow channels 372, and bottom channels 363 on both sides. As the triangular rotor 385 continues to rotate eccentrically, the ink flows back through the side holes 361 linearly evenly distributed on the side wall of the clamp 36 after the triangular rotor 385 rotates one circle and is evenly distributed on the side of the rubber plate 37.

[0037] like Figure 7 As shown, the printing mechanism 5 also includes an inspection platform 52, an adsorption mechanism 53 and a displacement cylinder 54. There are two groups of double-station guide rails 51, and the two groups of double-station guide rails 51 are arranged on both sides of the inspection platform 52. The double-station guide rails 51 are provided with an upper slide groove 511 and a side slide groove 512. The inspection platform 52 is slidingly connected to the upper slide groove 511, and the displacement cylinder 54 is fixedly connected to the double-station guide rail 51. The adsorption mechanism 53 includes a second slide 531, and the second slide 531 is fixedly connected to the output end of the displacement cylinder 54. The second slide 531 is slidingly connected to the side slide groove 512. The inspection platform 52 and the displacement cylinder 54 are both connected to the control panel 6 through electrical signals.

[0038] The output end of the displacement cylinder 54 drives the second slide 531 to move along the side slide groove 512 to the printing station below the screen 42. By different displacement distances of the second slide 531 along the double-station guide rail 51, the spacing of multiple printings on the same workpiece can be adjusted. After printing is completed, the inspection platform 52 slides and moves along the upper slide groove 511 to above the second slide 531 to detect the printing condition of the workpiece. When the printed pattern is blurred, color-missing, and unevenly printed, the reason may be that the screen spacing is too large or the ink scraping speed is too fast; when there are heavy color blocks in the printed pattern and the pattern is oily, the reason may be that the screen spacing is too small. The inspection platform 52 analyzes the pattern and feeds back an electrical signal to the control panel 6.

[0039] like Figure 8 As shown, the adsorption mechanism 53 also includes an adsorption plate 532 and a vacuum suction nozzle 533. The adsorption plate 532 is fixedly connected to the second slide 531 and the vacuum suction nozzle 533. The adsorption plate 532 is provided with air holes 5321. The air holes 5321 and the vacuum suction nozzle 533 are provided in several groups. Several groups of air holes 5321 are evenly distributed in a rectangular array on the adsorption plate 532, and several groups of vacuum suction nozzles 533 are evenly distributed linearly along the side wall of the adsorption plate 532.

[0040] Before printing, a flat workpiece is placed on the upper surface of the adsorption plate 532. Several groups of linearly evenly distributed vacuum nozzles 533 are used to continuously evacuate the adsorption plate 532. Several groups of rectangular arrays of evenly distributed air holes 5321 adsorb the flat workpiece to prevent the printed object from shifting during printing and causing printing failure.

[0041] The working principle of the present invention is as follows: the workpiece to be printed is placed on the printing mechanism 5, the second slide 531 moves along the side slide 512 to the printing station below the screen 42, the oil film is poured on the screen 42, the horizontal guide rail 24 moves downward along the vertical guide rail 21, so that the screen 42 is close to the top of the workpiece, the assembly frame 31 moves horizontally along the horizontal guide rail 24, when scraping ink, the rubber plate 37 contacts the upper surface of the screen 42, the rubber plate 37 scrapes the screen 42 at a certain angle and at a constant speed, and the ink is transferred to the screen 42 through the screen 42. On the workpiece, when the rubber plate 37 scrapes across the screen 42 at a constant speed at a certain angle, the ink accumulates on the rubber plate 37 and flows to both sides. The servo motor 381 outputs a fixed-axis torque, and the triangular rotor 385 rotates eccentrically in the rotary chamber 362 to squeeze the air and generate negative pressure. The ink flowing to both sides is drawn into the rotary chamber 362 through the liquid collecting hole 371. After the triangular rotor 385 rotates one circle, the ink flows back through the linearly evenly distributed side holes 361 on the side wall of the fixture 36 and is evenly distributed on the side of the rubber plate 37, preventing the ink from flowing to both sides. The ink return knife 35 contacts the upper surface of the screen 42, and the ink return knife 35 scrapes the remaining ink back to the starting end of the screen 42 to prepare for the next printing. By moving the second slide 531 along the double-station guide rail 51 at different distances, the spacing between multiple prints on the same workpiece can be adjusted. After printing is completed, the inspection platform 52 slides along the upper slide groove 511 to the top of the second slide 531 to detect the printing condition of the workpiece. When the printed pattern is blurred, color-missing, and uneven printing, the reason is that the screen spacing is too large or the ink scraping speed is too fast; when the printed pattern color block is too heavy and the pattern is oily, the reason may be that the screen spacing is too small. The inspection platform 52 analyzes the pattern and feeds back an electrical signal to the control panel 6. The control panel 6 sends an electrical signal to the printing mechanism 2 and the ink scraping mechanism 3 to automatically correct the screen spacing and ink scraping speed to improve printing accuracy.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A printing device with a spacing adjustment function, characterized in that: The printing device comprises a base frame (1), a printing mechanism (2), an ink scraping mechanism (3), a screen mechanism (4), a printing mechanism (5) and a control panel (6), wherein the printing mechanism (2) comprises a vertical guide rail (21), a horizontal guide rail (24) and a first slide (26), wherein the first slide (26) is fixedly connected to the ink scraping mechanism (3), the screen mechanism (4) comprises a side frame (41) and a screen plate (42), and the printing mechanism (5) comprises a double-station guide rail (51), wherein the vertical guide rail (21), the double-station guide rail (51) and the control panel (6) are all fixedly connected to the base frame (1), wherein the side frame (41) is fixedly connected to the horizontal guide rail (24) and the screen plate (42), and wherein the printing mechanism (2), the ink scraping mechanism (3) and the printing mechanism (5) are all connected to the control panel (6) via electrical signals.

2. The printing device with spacing adjustment function according to claim 1, characterized in that: The printing mechanism (2) further comprises a slide bar (22), a first air cylinder (23) and a rotary motor (25), wherein the first air cylinder (23) is fixedly connected to the vertical guide rail (21), the slide bar (22) is fixedly connected to the output end of the first air cylinder (23) and the horizontal guide rail (24), the horizontal guide rail (24) is slidably connected to the vertical guide rail (21), the rotary motor (25) is fixedly connected to the horizontal guide rail (24), the output end of the rotary motor (25) is connected to the first slide (26) via a belt drive, the first slide (26) is slidably connected to the horizontal guide rail (24), the first air cylinder (23) and the rotary motor (25) are both connected to the control panel (6) via electrical signals, and the ink scraping mechanism (3) comprises an assembly frame (31), and the first slide (26) is fixedly connected to the assembly frame (31).

3. The printing device with spacing adjustment function according to claim 2, characterized in that: The ink scraping mechanism (3) further comprises a servo cylinder (32), a sliding frame (33), a scraper mechanism (34) and an ink return knife (35). The servo cylinder (32) and the sliding frame (33) are each provided with two groups. The two groups of the servo cylinder (32) and the sliding frame (33) are both provided on both sides of the assembly frame (31). The servo cylinder (32) is fixedly connected to the assembly frame (31). The output end of the servo cylinder (32) is fixedly connected to the sliding frame (33). The sliding frame (33) is slidably connected to the assembly frame (31). The scraper mechanism (34) comprises a clamp (36). One group of the sliding frames (33) is fixedly connected to the clamp (36), and the other group of the sliding frames (33) is fixedly connected to the ink return knife (35). The servo cylinder (32) is connected to the control panel (6) via an electrical signal.

4. The printing device with spacing adjustment function according to claim 3, characterized in that: The scraper mechanism (34) further comprises a rubber plate (37) and a liquid return mechanism (38), wherein the liquid return mechanism (38) comprises a front end cover (382) and a rear end cover (383), and the clamp (36) is fixedly connected to the rubber plate (37), the front end cover (382), and the rear end cover (383).

5. The printing device with spacing adjustment function according to claim 4, characterized in that: The clamp (36) is provided with a bottom channel (363), and the rubber plate (37) is provided with a liquid collecting hole (371) and a flow channel (372). The liquid collecting holes (371) are provided in a plurality of groups, and the plurality of groups of liquid collecting holes (371) are provided at both ends of the rubber plate (37). The plurality of groups of liquid collecting holes (371) are evenly distributed in a triangular array along the side wall of the rubber plate (37). The number of the liquid collecting holes (371) decreases equidistantly towards the two ends of the rubber plate (37), and the flow channel (372) is connected to the bottom channel (363) and the liquid collecting holes (371).

6. The printing device with spacing adjustment function according to claim 5, characterized in that: The liquid return mechanism (38) further comprises a servo motor (381), a gear rod (384) and a triangular rotor (385), wherein the servo motor (381) is fixedly connected to the front end cover (382), and the output end of the servo motor (381) is fixedly connected to the gear rod (384). The fixture (36) is further provided with a side hole (361) and a rotary chamber (362), and the triangular rotor (385) is provided with an inner gear ring (3851). The gear rod (384) meshes with the tooth surface of the inner gear ring (3851), and the triangular rotor (385) contacts the rotary chamber (362). The side holes (361) are provided in a plurality of groups, and the plurality of groups of side holes (361) are linearly and evenly distributed along the axis of the gear rod (384).

7. The printing device with spacing adjustment function according to claim 1, characterized in that: The printing mechanism (5) further comprises an inspection platform (52), an adsorption mechanism (53) and a displacement cylinder (54); the double-station guide rail (51) is provided with two groups, and the two groups of the double-station guide rails (51) are provided on both sides of the inspection platform (52); the double-station guide rail (51) is provided with an upper slide groove (511) and a side slide groove (512); the inspection platform (52) is slidably connected to the upper slide groove (511); the displacement cylinder (54) is fixedly connected to the double-station guide rail (51); the adsorption mechanism (53) comprises a second slide (531); the second slide (531) is fixedly connected to the output end of the displacement cylinder (54); the second slide (531) is slidably connected to the side slide groove (512); the inspection platform (52) and the displacement cylinder (54) are both connected to the control panel (6) via electrical signals.

8. The printing device with spacing adjustment function according to claim 7, characterized in that: The adsorption mechanism (53) further comprises an adsorption plate (532) and a vacuum suction nozzle (533), wherein the adsorption plate (532) is fixedly connected to the second slide (531) and the vacuum suction nozzle (533), and the adsorption plate (532) is provided with air holes (5321), and the air holes (5321) and the vacuum suction nozzle (533) are provided in a plurality of groups, wherein the plurality of groups of air holes (5321) are uniformly distributed in a rectangular array on the adsorption plate (532), and the plurality of groups of vacuum suction nozzles (533) are uniformly distributed linearly along the side wall of the adsorption plate (532).

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