Silver paste through hole silk-screen template

Abstract

The utility model discloses a silver paste through hole silk-screen template, and belongs to the technical field of silver paste through holes. The device mainly comprises a frame body; the conveying mechanisms are located on the two sides of the interior of the frame body; the positioning mechanism is erected between the conveying mechanisms; the screen printing plate is located at the position, away from the conveying mechanism, of the frame body; the vacuum assembly is located at the upper end of the screen printing plate, and the vacuum assembly comprises a main pipeline located at the upper end of the screen printing plate; the connecting pipeline is positioned on the main pipeline; the vacuum pump is positioned on one side of the main pipeline; and the vacuum suction hole is positioned at the lower end of the screen printing plate. According to the silver paste through hole silk-screen template, the vacuum assembly is arranged to attach the silk-screen template to the circuit board, and the effect that silver paste can evenly permeate into the circuit board without overflowing is achieved.

Description

Technical Field

[0001] The present application relates to the field of silver paste through-hole technology, specifically to a silver paste through-hole silk screen template. Background Art

[0002] Silver paste through-hole technology is a connection technology that is gradually gaining widespread application in the printed circuit board (PCB) industry. Silver paste through-hole technology uses screen printing to penetrate silver conductive paste (silver glue) into pre-drilled (punched) holes. The silver glue then uses the capillary principle to absorb the silver glue to the hole wall, forming an interconnected conductive via. This process is simple and fast, suitable for large-scale production.

[0003] In the silver paste through-hole process, the silk screen template plays a vital role. Through the specific screen printing, conductive silver paste, carbon paste or copper paste and other printing materials are accurately infiltrated into the prefabricated holes to form interconnected conductive holes. The accuracy and quality of the silk screen template directly affect the performance and quality of the printed circuit board. Therefore, the production technology of the silk screen template is also one of the key technologies in the silver paste through-hole process.

[0004] For example, patent publication number CN217470435U specifically discloses a silver paste through-hole template for circuit boards. This patent uses a limit block in conjunction with an external positioning bolt to assist in fixing circuit boards of different sizes, thereby accommodating silver paste through-hole operations on circuit boards of different sizes.

[0005] However, during the implementation of the above patent, during the continuous silver paste penetration operation, there may be a certain gap between the silk screen template and the circuit board, which may cause silver paste overflow during the silver paste penetration process, affecting the operation of the circuit board silver paste penetration.

[0006] Therefore, it is necessary to provide a silver paste through-hole screen printing template to solve the above problems.

[0007] It should be noted that the above information disclosed in this Background section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the Invention

[0008] Based on the above-mentioned problems existing in the prior art, the problem to be solved by this application is: to provide a silver paste through-hole silk screen template, which solves the problem that silver paste overflows during the silver paste through-hole process due to a certain gap between the silk screen template and the circuit board, affecting the silver paste through-hole operation of the circuit board.

[0009] The technical solution adopted by this application to solve the technical problem is: a silver paste through-hole screen printing template, including:

[0010] frame;

[0011] A conveying mechanism, located on both sides of the frame, for transporting and processing circuit boards;

[0012] A positioning mechanism, which is arranged between the conveying mechanisms and is used to position the circuit board;

[0013] A silk screen plate, located at a position of the frame away from the conveying mechanism, and used for silver paste through-holes in the circuit board;

[0014] A vacuum assembly is located at the upper end of the screen printing plate, and includes:

[0015] A main pipeline, which is located at the upper end of the silk screen plate;

[0016] a connecting pipe, the connecting pipe being located on the main pipe;

[0017] a vacuum pump, the vacuum pump being located on one side of the main pipeline;

[0018] A vacuum suction hole is located at the lower end of the screen printing plate.

[0019] Furthermore, the screen printing plate is provided with grouting holes matching the through holes.

[0020] Furthermore, the conveying mechanism includes two sets of slide rails fixedly connected to the frame, a slider is slidably connected to the upper end of the slide rail, a motor is fixedly provided on one side of the slide rail, a screw is fixedly installed on the output end of the motor, and the slider is transmission-connected to the screw.

[0021] Furthermore, a plurality of groups of springs are fixedly connected to the slider, and the upper ends of the springs are fixedly connected to a bottom plate.

[0022] Furthermore, the bottom plate is fixedly connected to the cylinder, and a first positioning plate is fixedly provided at the output end of the cylinder. The first positioning plate is U-shaped, and a second positioning plate is fixedly provided on the bottom plate.

[0023] Furthermore, a stopper is fixedly provided at a position of the slide rail close to the motor.

[0024] Furthermore, a fixing mechanism is provided on both sides of the silk screen plate, and the fixing mechanism includes a connecting plate fixedly installed on the side of the silk screen plate, a first threaded hole is provided on the connecting plate, and locking buckles are bolted on both sides of the connecting plate, and a second threaded hole is provided at the corresponding position of the frame.

[0025] Furthermore, a plurality of groups of positioning pins are fixedly provided on the bottom plate, and positioning holes are fixedly provided on the screen printing plate, and the positioning holes are adapted to the plurality of groups of positioning pins fixedly provided on the bottom plate.

[0026] The beneficial effect of the present application is that the silver paste through-hole silk screen template provided by the present application achieves the effect that the silver paste can evenly penetrate the circuit board by setting a vacuum component to fit the silk screen template and the circuit board.

[0027] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0029] In the attached figure:

[0030] Figure 1 This is an overall schematic diagram of the silver paste through-hole screen printing template in this application;

[0031] Figure 2 for Figure 1 Schematic diagram of the conveying mechanism;

[0032] Figure 3 for Figure 2 Schematic diagram of the positioning mechanism;

[0033] Figure 4 for Figure 1 Schematic diagram of the silk screen template;

[0034] Figure 5 for Figure 4 Schematic diagram of the vacuum assembly;

[0035] Among them, the reference numerals in the figures are:

[0036] 1. Frame; 2. Conveying mechanism; 3. Fixing mechanism; 4. Circuit board; 5. Silk screen board; 20. Slider; 21. Slide rail; 22. Bottom plate; 23. Lead screw; 24. Motor; 25. Positioning mechanism; 251. Cylinder; 253. First positioning plate; 254. Second positioning plate; 31. Connecting plate; 32. Locking buckle; 33. Positioning hole; 34. Vacuum assembly; 341. Main pipeline; 342. Vacuum suction hole; 343. Vacuum pump; 340. Connecting pipeline; 27. Spring; 26. Positioning pin; 28. Stopper. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0039] like Figure 1-Figure 3 As shown, the present application provides a silver paste through-hole screen printing template, including a silver paste through-hole unit, which includes a screen printing plate 5. The screen printing plate 5 is used for silver paste through-holes in a circuit board 4. It should be noted that multiple groups of through-holes are opened on the circuit board 4, and grouting holes matching the through-holes are provided on the screen printing plate 5 to facilitate the filling of silver paste into the through-holes through the grouting holes.

[0040] The silver paste through-hole unit also includes a frame 1 and a conveying mechanism 2 fixedly connected to both sides of the frame 1. The conveying mechanism 2 is used to place a circuit board 4 to transport the circuit board 4 from a loading position to a position of a screen printing plate 5, thereby facilitating silver paste through-hole processing on the circuit board 4.

[0041] The conveying mechanism 2 includes two sets of slide rails 21 fixedly connected to the frame 1. A slider 20 is slidably connected to the upper end of the slide rails 21. At the same time, a motor 24 is fixedly installed on one side of the slide rails 21. A screw 23 is fixedly installed at the output end of the motor 24. The slider 20 is transmission-connected to the screw 23. When the motor 24 is operated, it can drive the slider 20 to move along the direction of the slide rails 21.

[0042] A plurality of springs 27 are fixedly connected to the slider 20. The upper ends of the springs 27 are fixedly connected to the base plate 22. The upper end of the base plate 22 is fixedly provided with a positioning mechanism 25. The positioning mechanism 25 is used to position the circuit board 4.

[0043] The positioning mechanism 25 includes a cylinder 251 fixedly connected to the base plate 22. A first positioning plate 253 is fixedly provided at the output end of the cylinder 251. The first positioning plate 253 is U-shaped, and a second positioning plate 254 is fixedly provided on the base plate 22. When the cylinder 251 pushes the first positioning plate 253 toward the second positioning plate 254, the second positioning plate 254 is fixedly provided, thereby clamping and positioning the circuit board 4.

[0044] Thus, when the circuit board 4 is placed on the bottom plate 22, the cylinder 251 pushes the first positioning plate 253 to move toward the second positioning plate 254 to fix the circuit board 4, and then the conveying mechanism 2 is used to transport it to a suitable position;

[0045] A stopper 28 is fixedly provided at a position of the slide rail 21 near the motor 24. The stopper 28 is used to limit the position of the slider 20 so that when the slider 20 contacts the stopper 28, the circuit board 4 is located directly below the screen printing plate 5.

[0046] like Figure 1 and Figure 4-Figure 5 As shown, in order to fix the screen printing plate 5 to the frame 1, fixing mechanisms 3 are provided on both sides of the screen printing plate 5, and the fixing mechanisms 3 are used to fix the screen printing plate 5 to the frame 1;

[0047] The fixing mechanism 3 includes a connecting plate 31 fixedly mounted on the side of the screen printing plate 5. The connecting plate 31 is provided with a first threaded hole (not shown in the figure). At the same time, locking buckles 32 are bolted to both sides of the connecting plate 31, and second threaded holes are provided at corresponding positions on the frame 1. When the screen printing plate 5 is placed on the frame 1, the locking buckles 32 can be rotated. When the locking buckles 32 are in contact with the connecting plate 31, they can clamp the connecting plate 31 to fix the screen printing plate 5 on the frame 1.

[0048] At the same time, multiple sets of positioning pins 26 are fixedly provided on the bottom plate 22, and positioning holes 33 are fixedly provided on the screen printing plate 5. The positioning holes 33 are adapted to the multiple sets of positioning pins 26 fixedly provided on the bottom plate 22 to quickly position the circuit board 4 and the screen printing plate 5.

[0049] At the same time, a vacuum assembly 34 is fixedly provided on the upper end of the screen printing plate 5, and the vacuum assembly 34 is used to firmly adsorb the circuit board 4 on the bottom;

[0050] The vacuum assembly 34 includes two sets of main pipes 341 fixedly arranged on both sides of the upper end of the screen printing plate 5. A plurality of connecting pipes 340 are fixedly connected to the main pipes 341. A plurality of vacuum suction holes 342 are provided on the screen printing plate 5. The connecting pipes 340 pass through the screen printing plate 5 and communicate with the vacuum suction holes 342. A sealing ring (not shown in the figure) is provided at the connection of the connecting pipes 340.

[0051] At the same time, a vacuum pump 343 is provided on the side of the main pipe 341 away from the conveying mechanism 2. The vacuum pump 343 is started to extract the gas inside the vacuum suction hole 342, forming a vacuum state therein, thereby tightly adsorbing and lifting the bottom plate 22. At this time, the circuit board 4 fixed on the upper end of the bottom plate 22 is attached to the screen printing plate 5 as the bottom plate 22 is adsorbed. The positioning pins 26 cooperate with the positioning holes 33 to stabilize the circuit board 4 in a predetermined position, so that the grouting holes on the screen printing plate 5 are aligned with the through holes of the circuit board 4, thereby allowing the silver paste to evenly penetrate the through holes of the circuit board 4 and prevent overflow.

[0052] When the drilling is completed, the vacuum pump 343 is turned off, and the pulling force of the vacuum suction hole 342 on the bottom plate 22 disappears. At this time, the pulling force of the spring 27 at the lower end of the bottom plate 22 causes the bottom plate 22 to descend to the slider 20 with the circuit board 4, and then be transported by the conveying mechanism 2.

[0053] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. Silver paste through-hole screen printing template, used for silver paste filling holes in circuit boards, characterized by: The silver paste through-hole screen printing template includes: Frame (1); A conveying mechanism (2), the conveying mechanism (2) is located on both sides of the interior of the frame (1), and the conveying mechanism (2) is used for transporting and processing circuit boards; A positioning mechanism (25), the positioning mechanism (25) being arranged between the conveying mechanisms (2), and the positioning mechanism (25) being used for positioning the circuit board; A silk screen plate (5), the silk screen plate (5) being located at a position of the frame (1) away from the conveying mechanism (2), the silk screen plate (5) being used for silver paste through-holes of a circuit board; A vacuum assembly (34), the vacuum assembly (34) is located at the upper end of the screen printing plate (5), and the vacuum assembly (34) includes: A main pipeline (341), the main pipeline (341) is located at the upper end of the screen printing plate (5); a connecting pipe (340), the connecting pipe (340) being located on the main pipe (341); a vacuum pump (343), the vacuum pump (343) being located on one side of the main pipeline (341); A vacuum suction hole (342), the vacuum suction hole (342) is located at the lower end of the screen printing plate (5).

2. The silver paste through-hole screen printing template according to claim 1, characterized in that: The screen printing plate (5) is provided with grouting holes matching the through holes.

3. The silver paste through-hole screen printing template according to claim 1, characterized in that: The conveying mechanism (2) comprises two sets of slide rails (21) fixedly connected to the frame (1); the upper ends of the slide rails (21) are slidably connected to a slider (20); a motor (24) is fixedly provided on one side of the slide rails (21); a lead screw (23) is fixedly installed at the output end of the motor (24); and the slider (20) is transmission-connected to the lead screw (23).

4. The silver paste through-hole screen printing template according to claim 3, characterized in that: A plurality of groups of springs (27) are fixedly connected to the slider (20), and the upper ends of the springs (27) are fixedly connected to the bottom plate (22).

5. The silver paste through-hole screen printing template according to claim 4, characterized in that: The bottom plate (22) is fixedly connected to a cylinder (251), and a first positioning plate (253) is fixedly provided at the output end of the cylinder (251), wherein the first positioning plate (253) is U-shaped, and a second positioning plate (254) is fixedly provided on the bottom plate (22).

6. The silver paste through-hole screen printing template according to claim 3, characterized in that: A stopper (28) is fixedly provided on the slide rail (21) at a position close to the motor (24).

7. The silver paste through-hole screen printing template according to claim 1, characterized in that: A fixing mechanism (3) is provided on both sides of the screen printing plate (5), and the fixing mechanism (3) includes a connecting plate (31) fixedly installed on the side of the screen printing plate (5), a first threaded hole is provided on the connecting plate (31), and locking buckles (32) are bolted on both sides of the connecting plate (31), and a second threaded hole is provided at a corresponding position of the frame (1).

8. The silver paste through-hole screen printing template according to claim 4, characterized in that: A plurality of groups of positioning pins (26) are fixedly provided on the base plate (22), and a positioning hole (33) is fixedly provided on the screen printing plate (5), and the positioning hole (33) is adapted to the plurality of groups of positioning pins (26) fixedly provided on the base plate (22).

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