Screen printing device for cylinder cover cap
By designing a screen printing device suitable for cylinder cover, and utilizing the combination of polyester fiber screen and low-hardness polyethylene squeegee, the problem of printing on the surface of cylinder cover was solved, achieving high-quality printing and enhanced screen extensibility.
Patent Information
- Application Number
- CN202423158682.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing screen printing technology cannot achieve high-quality printing on the curvature and uneven surfaces of cylinder head covers, and the screen is prone to fatigue damage.
A screen printing device including a frame mechanism and a squeegee mechanism was designed. It uses polyester or nylon fiber screen and a polyethylene squeegee with low hardness, combined with a tensioning component and an elastic element to ensure that the screen can make close contact on the curved surface and increase its extensibility.
It achieves high-quality printing on the curvature and uneven surfaces of the cylinder cover, maintains consistent printing results, and extends the lifespan of the screen.
Smart Images
Figure CN223545979U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cylinder cover technology, specifically relating to a screen printing device for cylinder covers. Background Technology
[0002] Screen printing involves stretching silk, synthetic fiber, or metal mesh onto a frame and creating a screen printing plate using methods such as hand-cutting of the enamel film or photochemical plate making. Modern screen printing technology utilizes photosensitive materials and photographic plate making to create screen printing plates for oil paintings, prints, posters, business cards, book covers, product packaging, product labels, printed textiles, glass, metal, and other flat media.
[0003] The cylinder cover is usually printed with the company's logo. Due to the large size of the engraving on the cylinder cover, hot stamping or die-cutting cannot be used. Because of the importance of the logo, pad printing and laser coding are not suitable. Therefore, screen printing, which is more aesthetically pleasing and has stronger adhesion, is more appropriate. However, current screen printing requires the screen printing position below the frame to be at the highest point, and the printing area must be flat and free of pits, with a smooth surface for better adhesion. The cylinder cover surface cannot meet these requirements. Therefore, screen printing on the cylinder cover surface requires the screen to have a certain degree of elasticity and extensibility. However, the extensibility of the screen is limited; repeated use will cause screen fatigue, decreased extensibility, and even direct damage to the screen structure. Utility Model Content
[0004] In view of this, in order to solve the problems of the prior art, the present invention provides a screen printing device for cylinder cover, which can print on the surface of the product with curvature and unevenness, and can also tighten the screen to increase its extensibility.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A screen printing device for a cylinder cover includes a worktable and a screen frame mechanism and a squeegee mechanism located above the worktable. The worktable is used to place the cylinder cover. The screen frame mechanism includes a screen frame, a screen, and tensioning components located at both ends of the screen frame. Each tensioning component includes a tension block and a rotating shaft. One side of the tension block contacts the surface of the screen, and the other side of the tension block is rotatably connected to the rotating shaft. The squeegee mechanism includes a first squeegee and a second squeegee. The first squeegee is used to scrape ink onto the screen, and the second squeegee is used to press the screen downward. The hardness of the second squeegee is less than that of the first squeegee.
[0007] According to some preferred embodiments of this utility model, the distance from the second scraper to the wire mesh is less than the distance from the first scraper to the wire mesh. The second scraper is made of polyethylene, and the wire mesh is made of polyester fiber or nylon fiber. The wire mesh is made of polyester fiber or nylon fiber with good extensibility, while the second scraper is made of polyethylene with lower hardness, making the fit between the second scraper and the wire mesh tighter and ensuring that the second scraper will not scratch the wire mesh. Simultaneously, the second scraper can press the wire mesh downwards under the action of the driver, causing the wire mesh to bend downwards. The second scraper can press the wire mesh into close contact with the uneven, curved surface of the cylinder cover to facilitate printing.
[0008] According to some preferred embodiments of the present invention, the wire frame mechanism further includes wire frame fixing components fixedly disposed at both ends of the wire frame. The wire frame fixing components include a first fixing seat and a second fixing seat connected to each other, wherein the second fixing seat is located on the side of the first fixing seat away from the wire frame.
[0009] According to some preferred embodiments of the present invention, the first fixing base includes a first fixing plate and a first side plate and a second side plate located on both sides of the first fixing plate. The first side plate is parallel to the second side plate and perpendicular to the first fixing plate. The first fixing plate is fixedly connected to the second fixing base. The first side plate is fixedly connected to one end of the mesh frame. The top surface of the second side plate is in contact with the bottom surface of one end of the mesh frame.
[0010] According to some preferred embodiments of the present invention, each of the tensioning components further includes one or more elastic elements located between the second side plate and the tensioning block, with one end of the elastic element fixedly connected to the bottom surface of the second side plate.
[0011] According to some preferred embodiments of the present invention, the top of the rotating shaft is fixedly connected to the bottom surface of the second side plate, and the tensioning block has a notch on the side away from the rotating shaft corresponding to the elastic element, the number of the notches being equal to the number of the elastic elements.
[0012] According to some preferred embodiments of the present invention, a crossbar is provided in the notch, and the two ends of the crossbar are fixedly connected to the side walls of the tensioning blocks on both sides of the notch. The end of the elastic element away from the second side plate is rotatably connected to the crossbar. The distance from the bottom of the tensioning block to the second side plate is less than the distance from the bottom surface of the mesh frame to the second side plate.
[0013] According to some preferred embodiments of the present invention, the wire mesh has a first state and a second state, the wire mesh includes a first part, a second part located at both ends of the first part, and a third part located at one end of each second part away from the first part; the second part is inclined and located below the second side plate, one side of the tensioning block contacts one side of the second part, and the top surface of the third part is attached to and fixedly connected to the bottom surface of the second fixing seat and a portion of the bottom surface of the second side plate.
[0014] According to some preferred embodiments of the present invention, when the wire mesh is in the first state, the top surface of the first part is in contact with the bottom surface of the mesh frame, and the first part is parallel to the horizontal plane. The elastic member is in a natural state, the length direction of the elastic member is perpendicular to the length direction of the second side plate, and the side of the tensioning block away from the rotating shaft is inclined outward and downward from the side of the tensioning block close to the rotating shaft.
[0015] When the wire mesh is in the second state, the elastic element is in a stretched state, and the acute angle formed between the width direction and the vertical direction of the tensioning block is smaller than the acute angle formed between the width direction and the vertical direction of the tensioning block when the wire mesh is in the first state.
[0016] According to some preferred embodiments of the present invention, the scraper mechanism further includes a third fixed base, a driver, a first scraper adjustment assembly, and a second scraper adjustment assembly. One end of the telescopic shaft of the driver is fixedly connected to one side of the third fixed base. The housing of the driver is fixedly connected to the top of both the first and second scraper adjustment assemblies. The length direction of both the first and second scrapers is perpendicular to the length direction of the mesh frame. The top of the first scraper is detachably connected to the first scraper adjustment assembly, and the top of the second scraper is detachably connected to the second scraper adjustment assembly.
[0017] Compared with the prior art, the advantages of this utility model are as follows: The screen printing device for cylinder cover of this utility model, by setting up a mesh frame mechanism and a squeegee mechanism that cooperate with each other, can print on the surface of the cylinder cover with curvature or unevenness, and can ensure that the product printing effect is no different from printing in a flat state; in addition, the tensioning component can rotate inward by the inward pulling force of the mesh while the second squeegee presses the mesh downward, thereby increasing the extensibility of the mesh. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a three-dimensional structural diagram of the cylinder cover and screen printing device in a preferred embodiment of the present invention;
[0020] Figure 2 This is a three-dimensional structural diagram of the screen printing device after concealing the worktable and base in a preferred embodiment of the present invention;
[0021] Figure 3 This is a three-dimensional structural diagram of the wire frame mechanism in a preferred embodiment of the present invention;
[0022] Figure 4 This is a side view of the wire mesh structure after the wire mesh is hidden in the preferred embodiment of the present invention;
[0023] The components include: workbench-1, base-2, wire mesh frame mechanism-3, wire mesh frame-31, wire mesh-32, first part-321, second part-322, third part-323, tension block-33, notch-331, crossbar-332, pivot-34, elastic element-35, first fixed plate-361, first side plate-362, second side plate-363, screw-364, second fixed seat-37, scraper mechanism-4, first scraper-41, second scraper-42, third fixed seat-43, driver-44, first connecting plate-451, first connecting frame-452, second connecting plate-46 1. Third connecting plate - 462, Fourth connecting plate - 463, Second connecting frame - 464, Moving mechanism - 5, Horizontal frame - 51, Waist-shaped hole - 511, First connecting block - 521, Second connecting block - 522, Horizontal plate - 53, First guide post - 54, Buffer block - 551, Limiting block - 552, First mounting seat - 561, Second fixing plate - 562, Second mounting seat - 563, Connecting shaft - 564, Third mounting seat - 565, Fourth mounting seat - 57, Top plate - 58, Second guide post - 591, Adjusting handwheel - 592, Handwheel connecting rod - 593, Cylinder cover - 6. Detailed Implementation
[0024] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.
[0025] Reference Figures 1 to 4 The screen printing device for the cylinder cover 6 in this embodiment includes a worktable 1, a base 2, and a screen frame mechanism 3, a scraper mechanism 4, and a moving mechanism 5 located above the worktable 1. The bottom of the worktable 1 is fixedly connected to the top of the base 2, and the base 2 is used to support the worktable 1. The worktable 1 is used to place the cylinder cover 6. The screen frame mechanism 3 and the scraper mechanism 4 are both connected to the moving mechanism 5 to move the screen frame mechanism 3 and the scraper mechanism 4 respectively.
[0026] Furthermore, the frame mechanism 3 includes a frame 31, a wire mesh 32, tensioning components located at both ends of the frame 31, and frame fixing components fixedly disposed at both ends of the frame 31. The wire mesh 32 has a first state and a second state, and includes a first part 321, second parts 322 located at both ends of the first part 321, and a third part 323 located at the end of each second part 322 away from the first part 321. When the wire mesh 32 is in the first state, the top surface of the first part 321 is in contact with the bottom surface of the frame 31, and the first part 321 is parallel to the horizontal plane. At this time, the wire mesh 32 is not being printed on the surface of the cylinder cover 6. In this embodiment, the wire mesh 32 is made of polyester fiber or nylon fiber to give it good extensibility.
[0027] Specifically, the wire mesh frame fixing assembly includes a first fixing seat and a second fixing seat 37 connected to each other. The first fixing seat includes a first fixing plate 361 and a first side plate 362 and a second side plate 363 located on both sides of the first fixing plate 361. The first side plate 362 is parallel to the second side plate 363 and located above the second side plate 363, and the first side plate 362 is perpendicular to the first fixing plate 361. The second fixing seat 37 is located on the side of the first fixing seat away from the wire mesh frame 31 and is fixedly connected to the first fixing plate 361. The first side plate 362 is fixedly connected to one end of the wire mesh frame 31 by a screw 364, and the top surface of the second side plate 363 is in contact with the bottom surface of one end of the wire mesh frame 31. The second part 322 of the wire mesh 32 is inclined and located below the second side plate 363, and the top surface of the third part 323 of the wire mesh 32 is in contact with and fixedly connected to the bottom surface of the second fixing seat 37 and a part of the bottom surface of the second side plate 363.
[0028] Each tensioning assembly includes a tensioning block 33, a rotating shaft 34, and one or more elastic elements 35. One side of the tensioning block 33 contacts one side of the second part 322 of the wire mesh 32, and the other side of the tensioning block 33 is rotatably connected to the rotating shaft 34. The top of the rotating shaft 34 is fixedly connected to the bottom surface of the second side plate 363. The elastic element 35 is located between the second side plate 363 and the tensioning block 33. Specifically, the side of the tensioning block 33 away from the rotating shaft 34 has a notch 331 corresponding to the elastic element 35, and the number of notches 331 is equal to the number of elastic elements 35. A crossbar 332 is provided in the notch 331. The two ends of the crossbar 332 are fixedly connected to the side walls of the tensioning block 33 on both sides of the notch 331. One end of the elastic element 35 is fixedly connected to the bottom surface of the second side plate 363, and the other end of the elastic element 35 is rotatably connected to the crossbar 332. The distance from the bottom of the tension block 33 to the second side plate 363 is less than the distance from the bottom surface of the frame 31 to the second side plate 363, so as to avoid the tension block 33 from touching the cylinder cover 6 and affecting the printing when printing on the surface of the cylinder cover 6.
[0029] Further, the scraper mechanism 4 includes a first scraper 41, a second scraper 42, a third fixed base 43, a driver 44, a first scraper adjustment assembly, and a second scraper adjustment assembly. One end of the telescopic shaft of the driver 44 is fixedly connected to one side of the third fixed base 43. In this embodiment, the driver 44 is preferably a cylinder. The driver 44 is used to drive the first scraper 41 and the second scraper 42 to move up and down in the vertical direction to approach and / or move away from the wire mesh 32. The first scraper adjustment assembly includes a first connecting plate 451 and a first connecting frame 452. The first connecting plate 451 is fixedly connected to the housing of the driver 44. The bottom surface of the first connecting plate 451 is fixedly connected to the top surface of the first connecting frame 452. The top of the first scraper 41 can be inserted into the first connecting frame 452. After the position of the first scraper 41 in the first connecting frame 452 is adjusted in advance, the first connecting frame 452 and the first scraper 41 are fixedly connected by a bolt and nut assembly. The second scraper adjustment assembly includes a second connecting plate 461, a third connecting plate 462, a fourth connecting plate 463, and a second connecting frame 464. The second connecting plate 461 is fixedly connected to the housing of the driver 44, and its bottom surface is fixedly connected to the top surface of the second connecting frame 464. The third connecting plate 462 and the fourth connecting plate 463 are parallel to each other and fixedly connected. The second scraper 42 is sandwiched between the third connecting plate 462 and the fourth connecting plate 463, and is parallel to the third connecting plate 462. The top of the third connecting plate 462 can be inserted into the second connecting frame 464. After the position of the third connecting plate 462 in the second connecting frame 464 is pre-adjusted, the second connecting frame 464 and the third connecting plate 462 are fixedly connected using a bolt and nut assembly, thereby adjusting the position of the second scraper 42 relative to the second connecting frame 464.
[0030] In this embodiment, the length directions of both the first scraper 41 and the second scraper 42 are perpendicular to the length direction of the screen frame 31. The first scraper 41 is used to scrape ink onto the screen 32, and the second scraper 42 is used to press the screen 32 downwards to better fit the screen 32 against the surface of the cylinder cover 6. Therefore, the hardness of the second scraper 42 is set to be less than that of the first scraper 41. The material of the second scraper 42 is polyethylene to ensure a tighter fit between the second scraper 42 and the screen 32, and to prevent the second scraper 42 from scratching the screen 32. In addition, to avoid the first scraper 41 touching the surface of the screen 32 when the second scraper 42 presses down on the screen 32, the distance between the second scraper 42 and the screen 32 is set to be less than the distance between the first scraper 41 and the screen 32.
[0031] Furthermore, the moving mechanism 5 includes a horizontal frame 51 and a horizontal plate 53. The horizontal frame 51 is parallel to the horizontal plate 53 and located below the horizontal plate 53. Both ends of the horizontal frame 51 are provided with waist-shaped holes 511 that penetrate its thickness direction. A first connecting block 521 is provided at each end of the horizontal frame 51. One first connecting block 521 can be slidably connected to the horizontal frame 51 through one waist-shaped hole 511. The end of the first connecting block 521 away from the horizontal frame 51 is fixedly connected to one end of the second fixed seat 37. By moving the two first connecting blocks 521 simultaneously along the length direction of the waist-shaped hole 511, the mesh frame mechanism 3 can be moved as a whole to the left and right positions above the cylinder cover 6. A second connecting block 522 is fixedly installed at each end of the side of the horizontal frame 51 away from the first connecting block 521. One side of the horizontal plate 53 is fixedly connected to one side of the two second connecting blocks 522. The first connecting block 521 is parallel to the second connecting blocks 522 and perpendicular to the horizontal frame 51. The top of the second connecting block 522 is located above the top of the first connecting block 521. A first guide post 54 parallel to the horizontal plate 53 is fixedly installed between the tops of the two second connecting blocks 522.
[0032] The moving mechanism 5 also includes a first mounting base 561, a second mounting base 563, and a third mounting base 565. The first mounting base 561 is slidably sleeved on the outer wall of the first guide post 54, that is, the first guide post 54 passes through the length direction of the first mounting base 561, and the first mounting base 561 can slide back and forth along the length direction of the first guide post 54 under the action of external force. A second fixing plate 562 is fixedly provided on the side of the first mounting base 561 near the scraper mechanism 4. The second mounting base 563 is fixedly provided at the bottom of the side of the second fixing plate 562 away from the first mounting base 561. A connecting shaft 564 is fixedly provided at the end of the second mounting base 563 away from the second fixing plate 562. One end of the third mounting base 565 is rotatably connected to the connecting shaft 564, and the other end of the third mounting base 565 is fixedly connected to one end of the third fixing base 43. When the screen printing device needs maintenance, the scraper mechanism 4 can be rotated by manually rotating the third mounting base 565 along the connecting shaft 564, which facilitates the installation or removal of the scraper mechanism 4.
[0033] Furthermore, a buffer block 551 and a limiting block 552 are fixedly installed on both sides of the first mounting base 561. Both the buffer block 551 and the limiting block 552 are fixedly sleeved on the outer wall of the first guide post 54. When the first mounting base 561 is moved, the limiting block 552 can restrict the position of the first mounting base 561, preventing the first mounting base 561 from moving too far and causing the scraper mechanism 4 to exceed the length range of the mesh frame 31; the buffer block 551 can buffer the collision between the first mounting base 561 and the limiting block 552.
[0034] The moving mechanism 5 also includes a fourth mounting base 57, a top plate 58, a second guide post 591, an adjusting handwheel 592, and a handwheel connecting rod 593. One side of the fourth mounting base 57 is fixedly connected to the side of the two second connecting blocks 522 away from the horizontal plate 53. The top plate 58 is located above the fourth mounting base 57 and parallel to the fourth mounting base 57. The second guide post 591 and the handwheel connecting rod 593 both pass through the height direction of the fourth mounting base 57 and the thickness direction of the top plate 58. The adjusting handwheel 592 is fixedly connected to the top end of the handwheel connecting rod 593. Specifically, in this embodiment, two second guide posts 591 are provided, located at both ends of the top plate 58 respectively. The top ends of the two second guide posts 591 are fixedly connected to the top plate 58, and the two second guide posts 591 are slidably connected to the fourth mounting base 57. The top end of the handwheel connecting rod 593 is rotatably connected to the top plate 58. The outer wall of the handwheel connecting rod 593 is provided with external threads, and the through hole in the fourth mounting base 57 for the handwheel connecting rod 593 to pass through is provided with internal threads, so that the handwheel connecting rod 593 and the fourth mounting base 57 are threadedly connected. By rotating the adjusting handwheel 592, the handwheel connecting rod 593 is driven to rotate, thereby driving the fourth mounting base 57 to move upward or downward along the length direction of the handwheel connecting rod 593. Finally, the mesh frame mechanism 3 and the scraper mechanism 4 can be driven to move upward or downward along the length direction of the handwheel connecting rod 593 as a whole, so as to adjust the distance between the mesh frame mechanism 3 and the scraper mechanism 4 and the cylinder cover 6 as a whole.
[0035] In this embodiment, when the wire mesh 32 is in the first state, the elastic element 35 is in its natural state. The length direction of the elastic element 35 is perpendicular to the length direction of the second side plate 363. The side of the tensioning block 33 away from the rotating shaft 34 is inclined outward and downward from the side of the tensioning block 33 close to the rotating shaft 34. When the second scraper 42 gradually approaches the wire mesh 32 downward under the action of the driver 44 and presses down on the first part 321 of the wire mesh 32, the wire mesh 32 is in the second state. While the wire mesh 32 is pressed down, the tensioning block 33 will be subjected to an inward pulling force, causing the tensioning block 33 to rotate inward from the position in the first state (close to the end of the wire frame 31) to tighten the wire mesh 32 and increase the extensibility of the wire mesh 32. At this time, the elastic element 35 is in a stretched state. When the second scraper 42 presses down on the second part 322 of the screen 32, the bottom surface of the second part 322 of the screen 32 can be made to adhere to the curved or uneven surface of the cylinder cover 6, thereby achieving screen printing on the surface of the cylinder cover 6.
[0036] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.
Claims
1. A screen printing device for cylinder cover, characterized in that, The device includes a worktable and a screen frame mechanism and a scraper mechanism located above the worktable. The worktable is used to place the cylinder cover. The screen frame mechanism includes a screen frame, a screen, and tensioning components located at both ends of the screen frame. Each tensioning component includes a tensioning block and a rotating shaft. One side of the tensioning block contacts the surface of the screen, and the other side of the tensioning block is rotatably connected to the rotating shaft. The scraper mechanism includes a first scraper and a second scraper. The first scraper is used to scrape ink onto the screen, and the second scraper is used to press the screen downwards. The hardness of the second scraper is less than that of the first scraper.
2. The screen printing apparatus according to claim 1, characterized in that, The distance from the second scraper to the wire mesh is less than the distance from the first scraper to the wire mesh. The second scraper is made of polyethylene, and the wire mesh is made of polyester fiber or nylon fiber.
3. The screen printing apparatus according to claim 1, characterized in that, The wire frame mechanism further includes wire frame fixing components fixedly disposed at both ends of the wire frame. The wire frame fixing components include a first fixing seat and a second fixing seat connected to each other, with the second fixing seat located on the side of the first fixing seat away from the wire frame.
4. The screen printing apparatus according to claim 3, characterized in that, The first fixing base includes a first fixing plate and a first side plate and a second side plate located on both sides of the first fixing plate. The first side plate is parallel to the second side plate and perpendicular to the first fixing plate. The first fixing plate is fixedly connected to the second fixing base. The first side plate is fixedly connected to one end of the mesh frame. The top surface of the second side plate is in contact with the bottom surface of one end of the mesh frame.
5. The screen printing apparatus according to claim 4, characterized in that, Each of the tensioning components further includes one or more elastic elements located between the second side plate and the tensioning block, with one end of the elastic element fixedly connected to the bottom surface of the second side plate.
6. The screen printing apparatus according to claim 5, characterized in that, The top of the rotating shaft is fixedly connected to the bottom surface of the second side plate. The tensioning block has a notch on the side away from the rotating shaft corresponding to the elastic element. The number of notches is equal to the number of elastic elements.
7. The screen printing apparatus according to claim 6, characterized in that, A crossbar is provided in the notch, and the two ends of the crossbar are fixedly connected to the side walls of the tensioning blocks on both sides of the notch. The end of the elastic element away from the second side plate is rotatably connected to the crossbar. The distance from the bottom of the tensioning block to the second side plate is less than the distance from the bottom surface of the mesh frame to the second side plate.
8. The screen printing apparatus according to claim 5, characterized in that, The wire mesh has a first state and a second state. The wire mesh includes a first part, a second part located at both ends of the first part, and a third part located at one end of each second part away from the first part. The second part is inclined and located below the second side plate. One side of the tensioning block contacts one side of the second part. The top surface of the third part is attached to and fixedly connected to the bottom surface of the second fixing seat and a part of the bottom surface of the second side plate.
9. The screen printing apparatus according to claim 8, characterized in that, When the wire mesh is in the first state, the top surface of the first part is in contact with the bottom surface of the wire mesh frame, and the first part is parallel to the horizontal plane. The elastic element is in a natural state, and the length direction of the elastic element is perpendicular to the length direction of the second side plate. The side of the tensioning block away from the rotating shaft is inclined outward and downward from the side of the tensioning block close to the rotating shaft. When the wire mesh is in the second state, the elastic element is in a stretched state, and the acute angle formed between the width direction and the vertical direction of the tensioning block is smaller than the acute angle formed between the width direction and the vertical direction of the tensioning block when the wire mesh is in the first state.
10. The screen printing apparatus according to claim 2, characterized in that, The scraper mechanism further includes a third fixed base, a driver, a first scraper adjustment assembly, and a second scraper adjustment assembly. One end of the telescopic shaft of the driver is fixedly connected to one side of the third fixed base. The housing of the driver is fixedly connected to the top of both the first and second scraper adjustment assemblies. The length direction of both the first and second scrapers is perpendicular to the length direction of the mesh frame. The top of the first scraper is detachably connected to the first scraper adjustment assembly, and the top of the second scraper is detachably connected to the second scraper adjustment assembly.