Printing template convenient to demould

Abstract

The utility model relates to the technical field of circuit board printing, in particular to a printing template convenient to demould, which comprises a frame body, the upper ends of two reset springs are jointly and fixedly connected with a pressing plate, the lower surface of the pressing plate is symmetrically and fixedly provided with movable columns penetrating through a cover plate, and the lower ends of the two movable columns are jointly and fixedly connected with a rectangular plate. A plurality of ejector pins connected with the printing holes in an inserted mode are fixedly installed on the lower surface of the rectangular plate. According to the circuit board printing template, the reset spring is compressed by pressing the pressing plate downwards, and the rectangular plate connected through the movable column is controlled to move downwards, so that solder paste in the printing hole can be ejected out by the ejector pin, the circuit board is prevented from being bonded with the printing steel mesh, and the problem that the circuit board printing template in the prior art is not easy to be damaged in actual use is solved. In the prior art, the solder paste for printing stays in the printing hole, and due to the viscosity of the solder paste, the circuit board and the printing template are easy to be bonded together, so that the technical problem of difficulty in demolding is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board printing, in particular to a printing template which is easy to demould. Background Art

[0002] A circuit board can be called a printed circuit board or printed circuit board. A circuit board consists of an integrated circuit, a quartz oscillator, a fine-tuning capacitor, and a printed circuit board. Circuit boards are known as ceramic circuit boards, alumina ceramic circuit boards, and aluminum nitride ceramic circuit boards. Circuit boards miniaturize and visualize circuits, playing a vital role in the mass production of fixed circuits and optimizing the layout of electrical appliances. In electronic devices, they are primarily used to connect various electronic components and serve as structural supports. Printing stencils are primarily used to print solder paste on circuit boards. The stencils have numerous printing holes. The quality of the finished printed circuit board can only be guaranteed if the solder paste within the holes is properly deposited onto the pads according to the shape and size of the holes.

[0003] The inventors of this application have found the following problems in practical use:

[0004] When currently used, solder paste used in existing circuit board printing templates can accumulate inside the printing holes. Due to the stickiness of the solder paste, the circuit board and the printing template can easily adhere to each other, making demolding difficult. Therefore, it is necessary to provide a printing template that facilitates demolding to address this technical problem. Utility Model Content

[0005] The technical problem to be solved by the present invention is that when the circuit board printing template in the prior art is actually used, the printing solder paste will stay inside the printing hole. Due to the viscosity of the solder paste itself, it is easy to cause the circuit board and the printing template to stick together, making it difficult to demold. In response to the above-mentioned defects of the prior art, a printing template that is easy to demold is provided, including a frame, the upper ends of two return springs are fixedly connected to a pressure plate, the lower surface of the pressure plate is symmetrically fixedly mounted with movable columns that penetrate the cover plate, the lower ends of the two movable columns are fixedly connected to a rectangular plate, and the lower surface of the rectangular plate is fixedly mounted with a plurality of ejector pins that are plugged into the printing holes. The utility model presses the pressure plate downward to compress the return spring, thereby controlling the rectangular plate connected by the movable columns to move downward, so that the ejector pins can eject the solder paste inside the printing hole, avoiding adhesion between the circuit board and the printing steel mesh. This solves the technical problem that when the circuit board printing template in the prior art is actually used, the printing solder paste will stay inside the printing hole. Due to the viscosity of the solder paste itself, it is easy to cause the circuit board and the printing template to stick together, making it difficult to demold.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a printing template that is easy to demold, comprising a frame, a printing steel mesh is fixedly installed on the inner side of the frame, the printing steel mesh includes a plurality of printing holes opened on the upper surface, the upper surface of the frame is hinged with a cover plate, the upper surface of the cover plate is symmetrically fixedly installed with reset springs, the upper ends of the two reset springs are commonly fixedly connected to a pressure plate, the lower surface of the pressure plate is symmetrically fixedly installed with movable columns that pass through the cover plate, the lower ends of the two movable columns are commonly fixedly connected to a rectangular plate, and the lower surface of the rectangular plate is fixedly installed with a plurality of ejectors that are plugged into the printing holes.

[0007] It is further provided that the movable column is located inside the reset spring, and a ball bushing connected to the cover plate is provided on the outer side of the movable column.

[0008] It is further provided that the rectangular plate is located inside the frame, and a groove is provided on the front surface of the cover plate.

[0009] It is further provided that mounting blocks are symmetrically fixedly mounted on the rear surface of the frame, and a mounting through hole is provided on one side of each mounting block.

[0010] It is further provided that the upper surface of the frame is provided with a receiving groove, the inner side of the receiving groove is symmetrically provided with a fixing groove, the rear surface of the cover plate is provided with a movable groove, the inner side of the movable groove is rotatably connected with a bidirectional screw passing through the cover plate, the outer side of the bidirectional screw is symmetrically screwed with movable blocks, and the opposite back sides of the two movable blocks are fixedly installed with fixing blocks plugged into the fixing groove.

[0011] It is further provided that the fixing block and the movable block are connected to form an L-shaped structure, and the movable block is slidably connected to the movable groove.

[0012] It is further provided that one end of the bidirectional lead screw is fixedly connected to an operating block, and the other end of the bidirectional lead screw is connected to the frame through a bearing.

[0013] Compared with the related art, the printing template provided by the present invention is easy to demould and has the following advantages:

[0014] Beneficial effects:

[0015] The utility model provides a printing template that is easy to demould. By pressing the pressure plate downward, the return spring is compressed, and the rectangular plate connected by the movable column is controlled to move downward, so that the ejector pin can eject the solder paste inside the printing hole, avoiding adhesion between the circuit board and the printing steel mesh. The utility model solves the technical problem of the circuit board printing template in the prior art that, when actually used, the solder paste used for printing will stay inside the printing hole. Due to the viscosity of the solder paste itself, the circuit board and the printing template are easily adhered together, making demoulding difficult.

[0016] The utility model provides a printing template that is easy to demould. The cover plate is lifted up to a vertical state, and the operating block is rotated at the same time to drive the bidirectional lead screw connected to the cover plate to rotate, so that the two movable blocks on the outside are controlled to drive the clamping blocks to move in opposite directions, so that the clamping blocks are clamped in the clamping grooves provided in the frame, so that the cover plate and the frame are fixed in a mutually perpendicular state without affecting the printing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a preferred embodiment of a printing template that is easy to demould provided by the present invention;

[0018] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 3 This is a rear view structural diagram of the connection between the cover plate and the frame of the utility model;

[0020] Figure 4 It is a partial enlarged view of part A of the present utility model.

[0021] Numbers in the figure: 1. Mounting through hole; 2. Operating block; 3. Frame; 4. Cover; 5. Pressing plate; 6. Mounting block; 7. Movable column; 8. Return spring; 9. Ball bushing; 10. Rectangular plate; 11. Printing steel mesh; 12. Printing hole; 13. Ejector pin; 14. Movable groove; 15. Fixing groove; 16. Accommodating groove; 17. Fixing block; 18. Movable block; 19. Bidirectional screw; 20. Groove. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings, in which typical embodiments of the present invention are shown.

[0023] Example 1:

[0024] like Figure 1-4 As shown, the utility model is a printing template that is easy to demold, including a frame body 3, a printing steel mesh 11 is fixedly installed on the inner side of the frame body 3, the printing steel mesh 11 includes a plurality of printing holes 12 opened on the upper surface, the upper surface of the frame body 3 is hinged with a cover plate 4, the upper surface of the cover plate 4 is symmetrically fixedly installed with a return spring 8, the upper ends of the two return springs 8 are commonly fixedly connected to a pressure plate 5, the lower surface of the pressure plate 5 is symmetrically fixedly installed with movable columns 7 that pass through the cover plate 4, the lower ends of the two movable columns 7 are commonly fixedly connected to a rectangular plate 10, and the lower surface of the rectangular plate 10 is fixedly installed with a plurality of ejector pins 13 that are plugged into the printing holes 12.

[0025] like Figure 2As shown, the movable column 7 is located inside the reset spring 8, and a ball bushing 9 connected to the cover plate 4 is provided on the outer side of the movable column 7 to avoid friction between the movable column 7 and the cover plate 4.

[0026] like Figure 1-2 As shown, the rectangular plate 10 is located inside the frame 3 , and a groove 20 is provided on the front surface of the cover 4 to facilitate opening the cover 4 .

[0027] like Figure 1 As shown, mounting blocks 6 are symmetrically fixedly mounted on the rear surface of the frame 3 , and a mounting through hole 1 is provided on one side of each mounting block 6 for rotational connection between the printing template and a preset bracket.

[0028] During implementation, by pressing the pressure plate 5 downward, the return spring 8 is compressed, and the rectangular plate 10 connected by the movable column 7 is controlled to move downward, so that the ejector pin 13 can eject the solder paste inside the printing hole 12, avoiding adhesion between the circuit board and the printed steel mesh 11. This solves the technical problem that when the circuit board printing template in the prior art is actually used, the printing solder paste will stay inside the printing hole 12. Due to the viscosity of the solder paste itself, it is easy to cause the circuit board and the printing template to stick together, making it difficult to demold.

[0029] Example 2:

[0030] like Figure 1-4 As shown, on the basis of embodiment 1, the utility model provides a technical solution: an accommodating groove 16 is provided on the upper surface of the frame 3, and a fixing groove 15 is symmetrically provided on the inner side of the accommodating groove 16, and a movable groove 14 is provided on the rear surface of the cover plate 4. The inner side of the movable groove 14 is rotatably connected with a bidirectional screw 19 that passes through the cover plate 4, and the outer side of the bidirectional screw 19 is symmetrically screwed with a movable block 18, and the opposite back sides of the two movable blocks 18 are fixedly installed with a fixing block 17 that is plugged into the fixing groove 15, and the fixing block 17 and the movable block 18 are connected to form an L-shaped structure, and the movable block 18 is slidably connected to the movable groove 14, one end of the bidirectional screw 19 is fixedly connected to the operating block 2, and the other end of the bidirectional screw 19 is connected to the frame 3 through a bearing.

[0031] During implementation, the cover plate 4 is lifted up to a vertical state, and at the same time, the operating block 2 is rotated to drive the bidirectional screw 19 connected thereto to rotate, so as to control the two movable blocks 18 on the outside to drive the fixing block 17 to move in opposite directions, so that the fixing block 17 is fixed in the fixing groove 15 opened in the frame 3, so as to facilitate fixing the cover plate 4 and the frame 3 in a mutually perpendicular state without affecting the progress of printing.

[0032] This technical solution utilizes mounting holes 1 and mounting blocks 6 to pivotally connect the printing template's frame 3 to a pre-set bracket. The bracket structure is not positioned directly behind the cover plate 4, preventing it from obstructing the rotation of the frame 3 and cover plate 4. Before use, the frame 3 and cover plate 4 are perpendicular to each other. During operation, the frame 3 and printing stencil 11 are horizontally rotated, and solder paste is applied to the circuit board through the printing holes 12 using a scraper. When the rectangular plate 10 and the ejector pin 13 are needed for demolding, first rotate the operating block 2 to drive the bidirectional lead screw 19 connected to it to rotate, and drive the two movable blocks 18 on the outside to drive the fixing block 17 to disengage from the inside of the fixing groove 15, and then cover the cover 4 on the frame 3. After that, the frame 3 and the cover 4 are kept as a whole and lifted up at a certain angle. Finally, wait for the solder paste to solidify, and press the pressure plate 5 to compress the return spring 8, driving the rectangular plate 10 connected by the movable column 7 to move downward, so that the ejector pin 13 pushes out the solder paste inside the printing hole 12 to prevent the circuit board from sticking to the printing steel mesh 11.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A printing template that is easy to demould, comprising a frame (3), characterized in that: A printing steel mesh (11) is fixedly installed on the inner side of the frame (3), and the printing steel mesh (11) includes a plurality of printing holes (12) opened on the upper surface. A cover plate (4) is hingedly connected to the upper surface of the frame (3), and a reset spring (8) is symmetrically fixedly installed on the upper surface of the cover plate (4). The upper ends of the two reset springs (8) are fixedly connected to a pressure plate (5). The lower surface of the pressure plate (5) is symmetrically fixedly installed with a movable column (7) passing through the cover plate (4). The lower ends of the two movable columns (7) are fixedly connected to a rectangular plate (10). The lower surface of the rectangular plate (10) is fixedly installed with a plurality of ejector pins (13) plugged into the printing holes (12).

2. A printing template that is easy to demould according to claim 1, characterized in that: The movable column (7) is located inside the reset spring (8), and a ball bushing (9) connected to the cover plate (4) is provided on the outside of the movable column (7).

3. A printing template that is easy to demould according to claim 1, characterized in that: The rectangular plate (10) is located inside the frame (3), and a groove (20) is provided on the front surface of the cover plate (4).

4. A printing template that is easy to demould according to claim 1, characterized in that: The rear surface of the frame (3) is symmetrically fixed with mounting blocks (6), and one side of each mounting block (6) is provided with a mounting through hole (1).

5. The printing template for easy demoulding according to claim 1, characterized in that: The upper surface of the frame (3) is provided with a receiving groove (16), and a fixing groove (15) is symmetrically provided on the inner side of the receiving groove (16). The rear surface of the cover plate (4) is provided with a movable groove (14), and the inner side of the movable groove (14) is rotatably connected to a bidirectional screw (19) that passes through the cover plate (4). The outer side of the bidirectional screw (19) is symmetrically screwed with a movable block (18), and the opposite back surfaces of the two movable blocks (18) are fixedly installed with a fixing block (17) that is plugged into the fixing groove (15).

6. A printing template that is easy to demould according to claim 5, characterized in that: The clamping block (17) and the movable block (18) are connected to form an L-shaped structure, and the movable block (18) is slidably connected to the movable groove (14).

7. A printing template for easy demoulding according to claim 6, characterized in that: One end of the bidirectional lead screw (19) is fixedly connected to the operating block (2), and the other end of the bidirectional lead screw (19) is connected to the frame (3) via a bearing.

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