PCB tin paste printing steel mesh rapid positioning installation jig

Abstract

The utility model discloses a kind of PCB tin paste printing steel net fast positioning installation fixture, including jig base, the inner side bottom of jig base is slidably clamped with jig positioning block, the top of jig positioning block is clamped with the PCB board with upper package and lower package, the side of jig base top is buckled with fixed fastener, the bottom of fixed fastener is correspondingly provided with first spacer on the upper package of PCB board top, the first spacer can isolate upper package with printing area;The end of fixed fastener close to the printing area of PCB board is detachably clamped with printing screen, the printing surface of printing screen is correspondingly arranged with the printing area of PCB board, and printing surface of printing screen is provided with printing hole position corresponding to printing position on PCB board;The utility model can be aimed at the structure of high and low staggered on circuit board to the printing screen fast and accurately position, ensure that printing screen is opposite the printing area on circuit board, and also can prevent tin paste to stick to nearby package area during brushing.

Description

Technical Field

[0001] This utility model belongs to the technical field of circuit board solder paste printing, specifically relating to a quick positioning and installation fixture for PCB solder paste printing stencil. Background Technology

[0002] Automatic placement technology is a technique commonly used in circuit board surface processing. It involves directly printing solder paste onto the circuit board surface at the location where surface mount components are needed, and then fixing the surface mount components directly onto the solder paste, thereby achieving accurate and rapid installation of surface mount components on the circuit board.

[0003] In actual production, the presence of encapsulation areas on the circuit board surface creates a staggered structure between these areas and the areas to be printed. Traditional methods of directly laying a printing screen on the printing area for solder paste printing can lead to excess solder paste coming into contact with nearby encapsulation areas, causing the solder paste to adhere to the surface of the encapsulation areas. Furthermore, existing printing screens are difficult to position quickly and accurately for this staggered structure, resulting in deviations in the final position of the printed solder paste on the circuit board.

[0004] Therefore, in view of the problems of difficulty in accurate and rapid positioning and installation of existing solder paste printing stencils when printing solder paste on the uneven structure of the circuit board, and the easy adhesion of solder paste to the nearby packaging area, this utility model discloses a PCB solder paste printing stencil quick positioning and installation fixture. Utility Model Content

[0005] This utility model discloses a quick positioning and installation fixture for PCB solder paste printing stencil, which can quickly and accurately position the printing stencil for the uneven structure on the circuit board, ensuring that the printing stencil is aligned with the printing area on the circuit board, and at the same time preventing the solder paste from sticking to the nearby packaging area during the application process.

[0006] This utility model is achieved through the following technical solution: A quick positioning and installation fixture for PCB solder paste printing stencil includes a fixture base. A fixture positioning block is slidably engaged with the bottom inner side of the fixture base. A PCB board with an upper and lower package is mounted on the top of the fixture positioning block. A fixing fastener is fastened to one side of the top of the fixture base. A first isolation member is provided at the bottom of the fixing fastener corresponding to the upper package on the top of the PCB board. The first isolation member can isolate the upper package from the printing area. A printing stencil is detachably mounted at one end of the fixing fastener near the printing area of ​​the PCB board. The printing surface of the printing stencil is corresponding to the printing area of ​​the PCB board, and the printing surface of the printing stencil is provided with printing holes corresponding to the printing positions on the PCB board.

[0007] To better realize this utility model, the fixed fastener is further provided with a fastening groove at the end away from the printing area, and the fastening groove is fastened to the top of the fixture base; a guide groove is provided on the side wall of the fixed fastener near the printing area, and a guide strip is provided at the end of the printing screen near the fixed fastener, and the guide strip is slidably connected to the guide groove.

[0008] To better realize this utility model, the bottom of the guide groove is provided with several threaded holes, and locking screws are installed inside the threaded holes.

[0009] To better realize this utility model, the printing surface of the printing screen is flush with the bottom of the upper package, and the printing surface of the printing screen is attached to the printing area of ​​the PCB board.

[0010] To better realize this utility model, the bottom of the fixing fastener is provided with an upper packaging groove corresponding to the position of the upper packaging, and a first isolation member is provided inside the upper packaging groove. The first isolation member covers and isolates at least the top surface of the upper packaging and the side of the upper packaging near the printing area.

[0011] To better realize this utility model, the first isolation member further includes an isolation cover, which is configured to correspond to the outer contour of the encapsulation.

[0012] To better realize this utility model, a rubber pad is further provided at the end of the isolation cover that is attached to the PCB board.

[0013] To better realize this utility model, a side guide strip is further provided on the inner bottom side wall of the fixture base, and a flange that is slidably connected to the side guide strip is provided on the side of the fixture positioning block.

[0014] To better realize this utility model, the fixture positioning block further includes a support block and a clearance groove. The clearance groove corresponds to the lower package setting at the bottom of the PCB board. Support blocks are provided on both sides of the clearance groove, and the top surface of the support block contacts the bottom surface of the PCB board.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects: (1) This utility model can quickly and accurately position and install the printing mesh by fastening and installing a fixing fastener on one side of the top of the fixture base and clamping the printing mesh at the end of the fixing fastener near the printing area, thereby adapting to the staggered structure on the PCB board and ensuring that the printing mesh is aligned with the printing area on the PCB board, thus ensuring the positional accuracy of solder paste printing. (2) This utility model sets a first isolation member at the bottom of the fixed fastener corresponding to the packaging area, and the first isolation member covers and isolates the upper packaging on the top of the PCB board, so that the upper packaging area is isolated from the printing area, thereby avoiding the situation where solder paste sticks to the packaging area during the solder paste printing process. (3) This utility model provides a fixture positioning block that is slidably installed on the inner bottom of the fixture base corresponding to the bottom contour of the PCB board. The fixture positioning block provides stable support for the non-encapsulated area at the bottom of the PCB board and avoids the encapsulated area at the bottom of the PCB board, thereby ensuring the stability of the PCB board during the solder paste printing process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the fixture positioning block; Figure 3 This is a side sectional view of the present invention; Figure 4 for Figure 3 A magnified view of part A.

[0017] Wherein: 1- Fixture base; 2- Fixture positioning block; 3- PCB board; 4- Fixing fastener; 5- Printed screen; 6- Locking screw; 21- Support block; 22- Clearance groove; 100- First isolation component; 200- Fastening groove; 300- Guide slide; 400- Guide strip; 101- Isolation cover. Detailed Implementation

[0018] Example 1: This embodiment provides a quick positioning and installation fixture for PCB solder paste printing stencils, such as... Figures 1-3 As shown, the fixture includes a fixture base 1, a fixture positioning block 2 that is slidably engaged with the bottom inner side of the fixture base 1, a PCB board 3 with an upper and lower package that is mounted on the top of the fixture positioning block 2, a fixing fastener 4 that is fastened to one side of the top of the fixture base 1, and a first isolation member 100 that is provided at the bottom of the fixing fastener 4 corresponding to the upper package on the top of the PCB board 3, the first isolation member 100 being able to isolate the upper package from the printing area; a printing screen 5 that is detachably mounted at one end of the fixing fastener 4 near the printing area of ​​the PCB board 3, the printing surface of the printing screen 5 being provided corresponding to the printing area of ​​the PCB board 3, and printing holes being provided on the printing surface of the printing screen 5 corresponding to the printing positions on the PCB board 3.

[0019] The fixture positioning blocks 2 support and position the non-lower package area at the bottom of the PCB board 3. After the PCB board 3 is clamped between the fixture positioning blocks 2, the printing screen 5 can be installed on the top of the PCB board 3. First, a fixing fastener 4 is fastened and installed on the side of the top of the fixture base 1 away from the printing area. The fixing fastener 4 serves as a support for installing the printing screen. At the same time, the first isolation piece 100 at the bottom of the fixing fastener 4 covers the upper package located on the printing area side, thus isolating the upper package on the top of the PCB board 3 from the printing area and preventing the overflowing solder paste from sticking to the outside of the upper package when solder paste is printed through the printing screen 5. Then, the printing screen 5 of the corresponding printing area specification is clamped on the end of the fixing fastener 4 near the printing area, ensuring that the printing surface of the printing screen 5 corresponds to the printing area on the PCB board 3. Solder paste can then be printed onto the printing area through the printing screen 5, and the solder paste is printed onto the printing position on the PCB board 3 through the printing holes.

[0020] For PCB boards 3 with different printing positions, it is only necessary to replace the printing screen 5 with the corresponding specification according to the printing position, so as to achieve convenient replacement of the printing screen 5.

[0021] Example 2: This embodiment discloses a quick positioning and installation fixture for PCB solder paste printing stencils, which is an optimization based on Embodiment 1, such as... Figures 2-4 As shown, the fixing fastener 4 has a fastening groove 200 at its end away from the printing area, which is fastened to the top of the fixture base 1. A guide groove 300 is provided on the side wall of the fixing fastener 4 near the printing area, and a guide strip 400 is provided at the end of the printing screen 5 near the fixing fastener 4. The guide strip 400 is slidably connected to the guide groove 300. The bottom of the guide groove 300 has several threaded holes, and locking screws 6 are installed inside the threaded holes.

[0022] The snap-fit ​​groove 200 is snapped into one side of the top of the fixture base 1 to achieve quick installation of the fastener 4. At the same time, a threaded hole is provided on the side wall of the snap-fit ​​groove 200, and a tightening screw is screwed into the threaded hole. By rotating the tightening screw, the end of the tightening screw is tightened to one side of the top of the fixture base 1, thereby fixing the fastener 4.

[0023] By sliding the guide groove 300 and the guide strip 400 together, the printing screen 5 can be quickly positioned and installed on the end of the fixing fastener 4 near the printing area. Simultaneously, by sliding the printing screen 5, the position of the printing surface of the printing screen 5 relative to the printing area of ​​the PCB board 3 can be adjusted. After the position adjustment is complete, the locking screw 6 can be rotated, and the end of the locking screw 6 screws into the threaded hole at the top of the guide groove 300, thereby locking the position of the printing screen 5.

[0024] Furthermore, the printing surface of the printing screen 5 is flush with the bottom of the upper package, and the printing surface of the printing screen 5 is attached to the printing area of ​​the PCB board 3. Here, "attached" means that the gap between the printing surface of the printing screen 5 and the printing area of ​​the PCB board 3 is less than or equal to 0.5mm, which can be regarded as attachment.

[0025] The rest of this embodiment is the same as that of Embodiment 1, so it will not be described again.

[0026] Example 3: This embodiment discloses a quick positioning and installation fixture for PCB solder paste printing stencils, which is an optimization based on Embodiment 1 or 2, such as... Figure 1 and Figure 2 As shown, the bottom of the fixing fastener 4 is provided with an upper packaging groove corresponding to the position of the upper packaging. A first isolation member 100 is provided inside the upper packaging groove. The first isolation member 100 covers and isolates at least the top surface of the upper packaging and the side of the upper packaging near the printing area. The first isolation member 100 includes an isolation cover 101, which is provided corresponding to the outer contour of the upper packaging.

[0027] First, fasten the isolation cover 101 to the outside of the upper package on the top of the PCB board 3 to cover and isolate the upper package. Then, align the upper package groove at the bottom of the fixing fastener 4 with the isolation cover 101 and fasten it to the top of the isolation cover 101 to position the isolation cover 101. Alternatively, the isolation cover 101 can be pasted into the upper package groove in advance with an adhesive pad to correspond to the position of the upper package.

[0028] Furthermore, a rubber pad is provided at the end of the isolation cover 101 that is in contact with the PCB board 3. The rubber pad can prevent the isolation cover 101 from making hard contact with the PCB board 3, thereby preventing damage to the PCB board 3 during the fastening and installation of the isolation cover 101.

[0029] The rest of this embodiment is the same as that in embodiment 1 or 2, so it will not be repeated here.

[0030] Example 4: This embodiment discloses a quick positioning and installation fixture for PCB solder paste printing stencils, which is an optimization based on any one of embodiments 1-3, such as... Figure 2As shown, a side guide strip is provided on the inner bottom sidewall of the fixture base 1, and a flange that slides and connects with the side guide strip is provided on the side of the fixture positioning block 2. The fixture positioning block 2 includes a support block 21 and a clearance groove 22. The clearance groove 22 corresponds to the lower package at the bottom of the PCB board 3. Support blocks 21 are provided on both sides of the clearance groove 22, and the top surface of the support block 21 contacts the bottom surface of the PCB board 3. The flange on the side of the fixture positioning block 2, which corresponds to the bottom contour of the PCB board 3, slides into the side guide strip on the inner bottom sidewall of the fixture base 1, thus realizing convenient installation of the fixture positioning block 2 on the inner bottom of the fixture base 1. At this time, the support block 21 supports the non-lower package area at the bottom of the PCB board 3, while the clearance groove 22 corresponds to the clearance of the lower package, avoiding interference with the lower package. By setting the support block 21 and the clearance groove 22, the bottom of the PCB board 3 can be stably supported, and the PCB board 3 can be limited in one direction to prevent the PCB board 3 from moving during the subsequent solder paste printing process, thereby ensuring the accuracy of the solder paste printing position.

[0031] The rest of this embodiment is the same as any one of embodiments 1-3, so it will not be described again.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A quick positioning and installation fixture for PCB solder paste printing stencil, comprising a fixture base (1), characterized in that, The fixture base (1) has a fixture positioning block (2) slidably attached to its inner bottom. The top of the fixture positioning block (2) is fitted with a PCB board (3) with an upper and lower package. A fixing fastener (4) is fastened to one side of the top of the fixture base (1). The bottom of the fixing fastener (4) is provided with a first isolation member (100) corresponding to the upper package on the top of the PCB board (3). The first isolation member (100) can isolate the upper package from the printing area. A printing screen (5) is detachably attached to one end of the fixing fastener (4) near the printing area of ​​the PCB board (3). The printing surface of the printing screen (5) is provided corresponding to the printing area of ​​the PCB board (3), and the printing surface of the printing screen (5) is provided with printing holes corresponding to the printing positions on the PCB board (3).

2. The PCB solder paste printing stencil quick positioning and installation fixture according to claim 1, characterized in that, The fixed fastener (4) has a fastening groove (200) at the end away from the printing area, and the fastening groove (200) is fastened to the top of the fixture base (1); the fixed fastener (4) has a guide groove (300) on the side wall near the printing area, and the printing screen (5) has a guide strip (400) at the end near the fixed fastener (4), and the guide strip (400) is slidably connected to the guide groove (300).

3. The PCB solder paste printing stencil quick positioning and installation fixture according to claim 2, characterized in that, The bottom of the guide groove (300) is provided with several threaded holes, and locking screws (6) are installed inside the threaded holes.

4. The PCB solder paste printing stencil quick positioning and installation fixture according to claim 3, characterized in that, The printing surface of the printing screen (5) is flush with the bottom of the upper package, and the printing surface of the printing screen (5) is attached to the printing area of ​​the PCB board (3).

5. A PCB solder paste printing stencil quick positioning and installation fixture according to any one of claims 1-4, characterized in that, The bottom of the fixing fastener (4) is provided with an upper packaging groove corresponding to the position of the upper packaging. The upper packaging groove is provided with a first isolation member (100). The first isolation member (100) covers and isolates at least the top surface of the upper packaging and the side of the upper packaging near the printing area.

6. A PCB solder paste printing stencil quick positioning and installation fixture according to claim 5, characterized in that, The first isolation member (100) includes an isolation cover (101) which is configured to correspond to the outer contour of the encapsulation.

7. A PCB solder paste printing stencil quick positioning and installation fixture according to claim 6, characterized in that, A rubber pad is provided at the end of the isolation cover (101) that is in contact with the PCB board (3).

8. A PCB solder paste printing stencil quick positioning and installation fixture according to any one of claims 1-4, characterized in that, A side guide strip is provided on the inner bottom side wall of the fixture base (1), and a flange that is slidably connected to the side guide strip is provided on the side of the fixture positioning block (2).

9. A PCB solder paste printing stencil quick positioning and installation fixture according to claim 8, characterized in that, The fixture positioning block (2) includes a support block (21) and a clearance groove (22). The clearance groove (22) is located at the bottom of the PCB board (3). Support blocks (21) are provided on both sides of the clearance groove (22). The top surface of the support block (21) is in contact with the bottom surface of the PCB board (3).

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