Screen frame fixing assembly for multi-screen frame printing

Abstract

The utility model relates to a kind of screen frame fixed subassembly of multi-screen frame printing.The screen frame fixed subassembly of multi-screen frame printing described in the utility model includes: screen frame, first moving beam and second moving beam, screen frame includes and is spaced apart and is set up front beam and rear beam, at least two screen frame containing spaces are provided between front beam and rear beam along first direction, the side of each screen frame containing space is provided with first moving beam, and first moving beam both ends are connected with front beam and rear beam respectively, and reciprocate along first direction, the other side of each screen frame containing space is provided with second moving beam, and second moving beam both ends are connected with front beam and rear beam respectively, and reciprocate along first direction.The screen frame fixed subassembly of multi-screen frame printing described in the utility model has the advantages of high printing efficiency and high compatibility.

Description

Technical Field

[0001] This utility model relates to the field of circuit board printing, and in particular to a frame fixing component for multi-frame printing. Background Technology

[0002] To shorten printing time and improve printing efficiency, existing vacuum screen printing machines employ a multi-table structure, as illustrated in Chinese patent CN220292278U. Each table can hold screen frames with the same or different patterns, enabling printing operations on multiple PCBs. However, this type of vacuum screen printing machine often suffers from uneven printing when printing on multiple screen frames, severely affecting print quality. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a frame fixing component for multi-frame printing, which has the advantages of high printing efficiency and high compatibility.

[0004] A screen frame fixing assembly for multi-frame printing includes a screen frame, a first movable beam, and a second movable beam. The screen frame includes a front beam and a rear beam extending along a first direction. The front beam and the rear beam are arranged side by side and spaced apart. At least two screen frame receiving spaces are provided between the front beam and the rear beam along the first direction. A first movable beam is provided on one side of each screen frame receiving space. The two ends of the first movable beam are respectively connected to the front beam and the rear beam and reciprocate along the first direction. A second movable beam is provided on the other side of each screen frame receiving space. The two ends of the second movable beam are respectively connected to the front beam and the rear beam and reciprocate along the first direction.

[0005] The screen frame fixing component for multi-screen printing described in this utility model is compatible with screen frames of different sizes, thereby ensuring that the pressure on both sides of the squeegee is equal when the squeegee scrapes ink on screen frames of different sizes, achieving uniform ink output and improving printing efficiency.

[0006] Furthermore, a first support member is provided on the first movable beam, and a second support member is provided on the second movable beam. The first support member and the second support member are used to support the two sides of the mesh frame, respectively.

[0007] Furthermore, the first support member includes a first connecting portion and a first supporting portion. The first connecting portion has multiple first slots, the length of which extends along the height direction, allowing for slight height adjustment relative to the first movable beam when the first connecting portion is connected to it. The first supporting portion extends into the mesh frame accommodating space and protrudes beyond the first movable beam. The second support member includes a second connecting portion and a second supporting portion. The second connecting portion has multiple second slots, the length of which extends along the height direction, allowing for slight height adjustment relative to the second movable beam when the second connecting portion is connected to it. The second supporting portion extends into the mesh frame accommodating space and protrudes beyond the second movable beam. This structure allows for individual adjustment of the levelness of all mesh frames, ensuring uniform force application by the scraper.

[0008] Furthermore, the first connecting part and the first supporting part are connected in an L-shape, and the second connecting part and the second supporting part are connected in an L-shape. This structure is simple, easy to install and adjust, and provides good support.

[0009] Furthermore, the first and second support members are formed by bending sheet metal or by using L-shaped profiles, resulting in a simple structure with good stability.

[0010] Furthermore, the system also includes a pressing assembly comprising a first pressing cylinder and a second pressing cylinder. At least two first pressing cylinders are spaced apart along the first moving beam, and at least two second pressing cylinders are spaced apart along the second moving beam. The first and second pressing cylinders are respectively used to press the screen frame against the first and second supports. This structure can fix the screen frame and prevent it from moving during printing.

[0011] Furthermore, a first locking cylinder is provided at the front end of the first moving beam to lock the first moving beam onto the front beam, and a third locking cylinder is provided at the front end of the second moving beam to lock the second moving beam onto the front beam. This structure can fix the first and second moving beams and prevent slippage during the printing process.

[0012] Furthermore, a second locking cylinder is provided at the rear end of the first moving beam to lock the first moving beam onto the rear beam, and a fourth locking cylinder is provided at the rear end of the second moving beam to lock the second moving beam onto the rear beam. This structure can further improve the stability of the moving beams during the printing process.

[0013] Furthermore, the first and third locking cylinders are each connected to the front beam via a first clamping member. The first clamping member has a through hole in its center, through which the front beam passes. The output ends of the first and third locking cylinders are inserted into the through hole and push the front beam against the inner wall of the through hole. The second and fourth locking cylinders are each connected to the rear beam via a second clamping member. The rear beam is clamped between the clamping plates of the second clamping member. The output ends of the second and fourth locking cylinders pull the clamping plates to clamp the rear beam. This structure can simultaneously lock and fix the moving beam while guiding its sliding motion.

[0014] Furthermore, the extension and retraction directions of the output ends of the first and third locking cylinders are perpendicular to the extension and retraction directions of the output ends of the second and fourth locking cylinders. This structure facilitates locking operations for workers.

[0015] Furthermore, the mesh frame also includes two fixing beams, whose ends respectively connect and fix the ends of the front beam and the rear beam. This structure secures the front beam and the rear beam, facilitating installation into the printing press.

[0016] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 A schematic diagram showing the deviation of the center line of the force application point of the scraper cylinder from the center line of the mesh frame in the existing product;

[0018] Figure 2 This is a schematic diagram illustrating the use of the wire mesh frame fixing assembly described in this utility model;

[0019] Figure 3 This is a structural diagram of the wire mesh frame fixing assembly described in this utility model;

[0020] Figure 4 This is a partial structural diagram of the first and second support members;

[0021] Figure 5 This is a diagram showing the connection structure between the locking cylinder and the moving beam.

[0022] Figure 6 This is a schematic diagram of the installation of a large-size wire mesh frame;

[0023] Figure 7 This is a schematic diagram of the installation of a small-sized wire mesh frame;

[0024] Explanation of reference numerals in the attached drawings: 1. Grid frame; 11. Front beam; 12. Rear beam; 13. Fixed beam; 2. First moving beam; 21. First clamping cylinder; 22. First locking cylinder; 23. Second locking cylinder; 3. Second moving beam; 31. Second clamping cylinder; 32. Third locking cylinder; 33. Fourth locking cylinder; 4. First support member; 41. First connecting part; 42. First support part; 43. First slot; 5. Second support member; 51. Second connecting part; 52. Second support part; 53. Second slot; 6. First clamping member; 7. Second clamping member; 8. Grid frame; 9. Scraper. Detailed Implementation

[0025] The existing mesh frame fixing bracket can only be adjusted on one side. When the size of the mesh frame is inconsistent with the designed center line of the cylinder's force application point, the center line of the scraper cylinder's force application point will deviate from the center line of the mesh frame. Please refer to [link / reference needed]. Figure 1 There is a distance d between the center line of the screen frame and the center line of the cylinder force application point. When the doctor blade presses down to scrape ink, the pressure on the screen frame is uneven, resulting in uneven ink application to the screen frame, which affects the printing quality.

[0026] Please see Figure 2-7 , Figure 2 This is a schematic diagram illustrating the use of the wire mesh frame fixing assembly described in this utility model; Figure 3 This is a structural diagram of the wire mesh frame fixing assembly described in this utility model; Figure 4 This is a partial structural diagram of the first and second support members; Figure 5 This is a diagram showing the connection structure between the locking cylinder and the moving beam. Figure 6 This is a schematic diagram of the installation of a large-size wire mesh frame; Figure 7 This is a schematic diagram of the installation of a small-sized wire mesh frame.

[0027] This utility model discloses a screen frame fixing assembly for multi-frame printing, which is typically used in vacuum printing machines to fix the printing screen frame 8. The screen frame fixing assembly includes a screen frame 1, a first movable beam 2 and a second movable beam 3, both of which are disposed within the screen frame 1.

[0028] The mesh frame 1 includes a front beam 11, a rear beam 12, and a fixed beam 13. Both the front beam 11 and the rear beam 12 extend along a first direction (left-right direction in this embodiment for ease of explanation). Two fixed beams 13 are respectively positioned on either side of the mesh frame 8 placement space, with their ends connected and fixed to the ends of the front beam 11 and the rear beam 12, respectively. The front beam 11 and the rear beam 12 are arranged side-by-side and spaced apart, thus leaving at least two mesh frame accommodating spaces between them. These mesh frame accommodating spaces are distributed along the first direction. The number of mesh frame accommodating spaces can be determined based on the actual printing volume; only the structure of two mesh frame accommodating spaces is shown in the accompanying drawings of this embodiment.

[0029] Each mesh frame accommodating space has a first movable beam 2 on its left side, with its two ends connected to the front beam 11 and the rear beam 12 respectively, and can reciprocate along a first direction. Each mesh frame accommodating space has a second movable beam 3 on its right side, with its two ends connected to the front beam 11 and the rear beam 12 respectively, and can reciprocate along a first direction.

[0030] A first support member 4 is provided on the first movable beam 2, and a second support member 5 is provided on the second movable beam 3. The first support member 4 and the second support member 5 are used to support the two sides of the mesh frame 8, respectively. One mesh frame 8 can be placed in each mesh frame accommodating space, or multiple mesh frames 8 can be placed along the extension direction of the first movable beam 2 and the second movable beam 3. To facilitate the adjustment of the level of the mesh frame 8, the support member can be height-adjustable, for example, by having a telescopic structure or a drive source that drives the support surface to move along the height direction. In this embodiment, the support height of the mesh frame 8 can be finely adjusted by providing slots in the support member.

[0031] The first support member 4 is bent or made of an L-shaped profile, including a first connecting part 41 and a first support part 42. The first connecting part 41 and the first support part 42 are connected in an L-shape. The first connecting part 41 is connected to the first movable beam 2 and has a plurality of first slots 43. The length of the first slots 43 extends along the height direction, so that the first connecting part 41 can be finely adjusted relative to the first movable beam 2 in the height direction. The first support part 42 extends into the mesh frame accommodating space and protrudes from the first movable beam 2.

[0032] The second support member 5 is formed by bending or is made of an L-shaped profile. In this embodiment, to ensure the supporting effect while reducing production costs, the first support member 4 is formed by bending, and the second support member 5 is made of an L-shaped profile. The second support member 5 includes a second connecting part 51 and a second support part 52, which are connected in an L-shape. The second connecting part 51 has a plurality of second slots 53, the length of which extends along the height direction, so that the second connecting part 51 can be finely adjusted relative to the second moving beam 3 in the height direction. The second support part 52 extends into the mesh frame accommodating space and protrudes from the second moving beam 3.

[0033] The first moving beam 2 and the second moving beam 3 are also equipped with clamping components. These clamping components can have various structural forms, such as pressure plates or electric clamping blocks. In this embodiment, the first moving beam 2 is equipped with a first clamping cylinder 21. There are at least two first clamping cylinders 21 distributed at intervals along the first moving beam 2. The first clamping cylinders 21 are used to press the mesh frame 8 against the first support member 4, thereby fixing the left side of the mesh frame 8. The second moving beam 3 is also equipped with a second clamping cylinder 31. There are at least two second clamping cylinders 31 distributed at intervals along the second moving beam 3. The second clamping cylinders 31 are used to press the mesh frame 8 against the second support member 5, thereby fixing the right side of the mesh frame 8.

[0034] To achieve locking and positioning of the first moving beam 2 and the second moving beam 3, a locking assembly is also provided. This locking assembly can take many forms, such as fasteners, clamps, magnetic components, adhesives, etc.

[0035] In this embodiment, a first locking cylinder 22 is provided at the front end of the first moving beam 2 to lock the first moving beam 2 onto the front beam 11, and a second locking cylinder 23 is provided at the rear end of the first moving beam 2 to lock the first moving beam 2 onto the rear beam 12. A third locking cylinder 32 is provided at the front end of the second moving beam 3 to lock the second moving beam 3 onto the front beam 11, and a fourth locking cylinder 33 is provided at the rear end of the second moving beam 3 to lock the second moving beam 3 onto the rear beam 12.

[0036] The first locking cylinder 22 and the third locking cylinder 32 are each connected to the front beam 11 via a first clamping member 6. A through hole is provided in the middle of the first clamping member 6, through which the front beam 11 passes. The output ends of the first locking cylinder 22 and the third locking cylinder 32 are inserted into the through hole and push the front beam 11 against the inner wall of the through hole. The second locking cylinder 23 and the fourth locking cylinder 33 are each connected to the rear beam 12 via a second clamping member 7. The rear beam 12 is clamped between the clamping plates of the second clamping member 7. The output ends of the second locking cylinder 23 and the fourth locking cylinder 33 pull the clamping plates to clamp the rear beam 12. The extension and retraction directions of the output ends of the first locking cylinder 22 and the third locking cylinder 32 are perpendicular to the extension and retraction directions of the output ends of the second locking cylinder 23 and the fourth locking cylinder 33.

[0037] This embodiment illustrates the printing process using two screen frames. During use, the two screen frames are placed in their respective receiving spaces. Next, all locking cylinders are released, allowing the first and second moving beams to slide laterally left and right. The distance between the first and second moving beams is adjusted to match the size of the screen frame, ensuring the left side of the bottom of the screen frame supports the first support member and the right side supports the second support member. At this point, the height of the screen frame can be finely adjusted through slots. Specifically, screws connected to the moving beams typically pass through these slots. Loosening the screws allows the support member to move freely between the moving beam and the support member. Pulling the support member allows it to slide up and down along the slot to the target position, then tightening the screws. Next, the clamping cylinder is activated to press the screen frame firmly onto the support member. The first and second moving beams are then slid laterally left and right according to the position of the squeegee, adjusting the screen frame's position so that its centerline coincides with the squeegee's force application centerline. After adjustment, the locking cylinders are activated to secure the first and second moving beams to the front and rear beams, preventing slippage during printing. Finally, the PCB board can be printed through other structures of the printing press; the principle will not be elaborated here.

[0038] The screen frame fixing component for multi-screen printing described in this utility model is compatible with screen frames of different sizes and allows for individual adjustment of the left and right positions and level of all screen frames. This ensures that the pressure on both sides of the squeegee is equal when the squeegee scrapes ink on screen frames of different sizes, resulting in uniform ink output and improved printing efficiency.

[0039] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.

Claims

1. A screen frame fixing assembly for multi-screen printing, characterized in that: The device includes a grid frame, a first movable beam, and a second movable beam. The grid frame includes a front beam and a rear beam extending along a first direction. The front beam and the rear beam are arranged side by side and spaced apart. At least two grid frame accommodating spaces are provided between the front beam and the rear beam along the first direction. A first movable beam is provided on one side of each grid frame accommodating space. The two ends of the first movable beam are respectively connected to the front beam and the rear beam. The first movable beam reciprocates along the first direction. A second movable beam is provided on the other side of each grid frame accommodating space. The two ends of the second movable beam are respectively connected to the front beam and the rear beam. The second movable beam reciprocates along the first direction.

2. The frame fixing assembly for multi-frame printing according to claim 1, characterized in that: The first movable beam is provided with a first support member, and the second movable beam is provided with a second support member. The first support member and the second support member are used to support the two sides of the mesh frame respectively.

3. The frame fixing assembly for multi-frame printing according to claim 2, characterized in that: The first support member includes a first connecting portion and a first supporting portion. The first connecting portion has a plurality of first slots, the length of which extends along the height direction, so that the first connecting portion can be slightly adjusted relative to the first movable beam in the height direction when connected to it. The first supporting portion extends into the mesh frame accommodating space and protrudes from the first movable beam. The second support member includes a second connecting portion and a second supporting portion. The second connecting portion has a plurality of second slots, the length of which extends along the height direction, so that the second connecting portion can be slightly adjusted relative to the second movable beam in the height direction when connected to it. The second supporting portion extends into the mesh frame accommodating space and protrudes from the second movable beam.

4. The frame fixing assembly for multi-frame printing according to claim 3, characterized in that: The first connecting part and the first supporting part are connected in an L-shape, and the second connecting part and the second supporting part are connected in an L-shape.

5. The frame fixing assembly for multi-frame printing according to claim 4, characterized in that: The first and second support members are formed by bending sheet metal or made of L-shaped profiles.

6. The frame fixing assembly for multi-frame printing according to any one of claims 3-5, characterized in that: It also includes a pressing assembly, which includes a first pressing cylinder and a second pressing cylinder. There are at least two first pressing cylinders distributed at intervals along the first moving beam, and at least two second pressing cylinders distributed at intervals along the second moving beam. The first pressing cylinder and the second pressing cylinder are used to press the mesh frame against the first support member and the second support member, respectively.

7. The frame fixing assembly for multi-frame printing according to claim 6, characterized in that: The first movable beam is provided with a first locking cylinder at its front end for locking the first movable beam onto the front beam, and the second movable beam is provided with a third locking cylinder at its front end for locking the second movable beam onto the front beam.

8. The frame fixing assembly for multi-frame printing according to claim 7, characterized in that: A second locking cylinder is provided at the rear end of the first moving beam for locking the first moving beam onto the rear beam, and a fourth locking cylinder is provided at the rear end of the second moving beam for locking the second moving beam onto the rear beam.

9. The frame fixing assembly for multi-frame printing according to claim 8, characterized in that: The first and third locking cylinders are respectively connected to the front beam through a first clamping member. The first clamping member has a through hole in the middle, through which the front beam passes. The output ends of the first and third locking cylinders pass through the through hole and push the front beam against the inner wall of the through hole. The second and fourth locking cylinders are respectively connected to the rear beam through a second clamping member. The rear beam is clamped between the clamping plates of the second clamping member. The output ends of the second and fourth locking cylinders pull the clamping plates to clamp the rear beam.

10. The frame fixing assembly for multi-frame printing according to claim 9, characterized in that: The extension and retraction directions of the output ends of the first and third locking cylinders are perpendicular to the extension and retraction directions of the output ends of the second and fourth locking cylinders. The grid frame also includes two fixed beams, the ends of which are respectively connected and fixed to the ends of the front beam and the rear beam.

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