Auxiliary device of circuit board screen printing machine

Abstract

The utility model relates to the technical field of circuit board screen printing, in particular to an auxiliary device of a circuit board screen printing machine, which is characterized in that after an inclined screen plate is clamped and positioned by a u-shaped block, the offset distance of the screen plate is detected by a distance sensor, and then the front and back positions of the screen plate are repositioned by a push block; the problem that the screen printing operation is interfered due to the deviation phenomenon when the inclined screen plate is clamped and positioned by the u-shaped block is avoided; an auxiliary device of a circuit board screen printing machine comprises a u-shaped block, a first connecting block, a distance sensor, a first telescopic air cylinder, a second telescopic air cylinder, a push block, a driving assembly and a fixing assembly. The number of the u-shaped blocks is at least two. Each u-shaped block is fixedly connected with a connecting block I; each first connecting block is fixedly connected with a distance sensor; a first telescopic air cylinder is fixedly connected to each u-shaped block. The telescopic end of each first telescopic air cylinder is fixedly connected with a second telescopic air cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board screen printing, and more specifically, to an auxiliary device for a circuit board screen printer. Background Art

[0002] In the screen printing process, when the specifications of the circuit board are changed, the stencil should be replaced. When the stencil is replaced manually, the distance between the two fixed rails of the screen printer should be adjusted according to the width of the stencil, so that the distance between the two fixed rails is slightly larger than the width of the stencil. The stencil is then inserted between the two fixed rails, and then the two fixed rails move toward each other to position and clamp the stencil to complete the installation operation. However, if the stencil edge is not parallel to the axial direction of the fixed rails after the stencil is inserted between the two fixed rails, the stencil will shift along the axial direction of the fixed rails during the process of the two fixed rails positioning and clamping the stencil, resulting in a deviation between the stencil position and the preset position, causing the screen printing ink to shift, thereby affecting the solder mask operation of the circuit board. Utility Model Content

[0003] In order to overcome the disadvantage of the prior art that the screen plate may be offset when the screen plate is installed, the utility model provides an auxiliary device for a circuit board screen printer.

[0004] A circuit board screen printer auxiliary device comprises a U-shaped block, a connecting block 1, a distance sensor, a telescopic cylinder 1, a telescopic cylinder 2, a push block, a driving assembly and a fixing assembly; at least two U-shaped blocks are provided; each U-shaped block is fixedly connected to a connecting block 1; each connecting block 1 is fixedly connected to a distance sensor; each U-shaped block is fixedly connected to a telescopic cylinder 1; the telescopic end of each telescopic cylinder 1 is fixedly connected to a telescopic cylinder 2; the telescopic end of each telescopic cylinder 2 is fixedly connected to a push block, and the push block contacts the corresponding U-shaped block; an electromagnet is provided on the inner side of each push block; the U-shaped block is connected to a driving assembly, and the driving assembly is used to drive the U-shaped block to perform horizontal linear motion; the U-shaped block is connected to a fixing assembly, and the fixing assembly is used to fix the screen.

[0005] As a further preferred scheme, the driving assembly includes an electric slide rail, an electric slider and a connecting block 2; at least two electric slide rails are arranged on the U-shaped block; each electric slide rail is slidably connected to an electric slider; each electric slider is fixedly connected to a connecting block 2, and the connecting block 2 is fixedly connected to the corresponding U-shaped block.

[0006] As a further preferred solution, the fixing assembly includes a telescopic cylinder three and a pressure block; at least two telescopic cylinders three are fixedly connected to each U-shaped block; and a pressure block is fixedly connected to the telescopic end of each telescopic cylinder three.

[0007] As a further preferred scheme, it also includes a cleaning component; the cleaning component is connected to the U-shaped block; the cleaning component includes a telescopic cylinder four, a cutter and a storage box; each U-shaped block is fixedly connected to a telescopic cylinder four; the telescopic end of each telescopic cylinder four is detachably connected to a cutter, and the cutter is slidably connected to the corresponding U-shaped block; each U-shaped block is pluggably connected to a storage box.

[0008] As a further preferred solution, it also includes a protrusion; each storage box is fixed with a protrusion.

[0009] A circuit board screen printing process includes the following steps:

[0010] Step 1: pickling: spraying pickling solution on the surface of the circuit board through a fan-shaped nozzle to pickle the circuit board;

[0011] Step 2: grinding the board, grinding the surface of the circuit board by sandblasting to increase the roughness of the surface of the circuit board;

[0012] Step 3: Cleaning: Clean the circuit board after grinding;

[0013] Step 4: drying, drying the cleaned circuit board;

[0014] Step 5: Installation: Use the circuit board screen printer auxiliary device to install the screen on the screen printer;

[0015] Step six: silk screen printing, silk screen printing on the circuit board.

[0016] Beneficial effects of the utility model:

[0017] 1. After the U-shaped block clamps and positions the tilted stencil, the offset distance of the stencil is detected by the distance sensor, and then the front and rear positions of the stencil are repositioned by the push block, thus avoiding the problem of interference with the screen printing operation due to the offset phenomenon when the U-shaped block clamps and positions the tilted stencil;

[0018] 2. Use a cutter to scrape away the impurities remaining on the back side of the stencil, avoiding the problem that the distance measured by the distance sensor is less than the actual value due to impurities remaining on the back side of the stencil, thereby avoiding the problem of stencil positioning failure;

[0019] 3. You only need to pull the bump to quickly take out the storage box for cleaning, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The schematic diagram of the structure of the auxiliary device of the circuit board screen printer of the utility model is shown;

[0021] Figure 2The schematic diagram of the structure of the cleaning component of the utility model is shown;

[0022] Figure 3 The structure diagram of the fixing assembly of the utility model is shown;

[0023] Figure 4 The schematic diagram of the structure of the storage box of the utility model is shown.

[0024] Figure numbers: 1-U-shaped block, 2-connecting block one, 3-distance sensor, 4-telescopic cylinder one, 5-telescopic cylinder two, 6-push block, 7-electric slide rail, 8-electric slide block, 9-connecting block two, 10-telescopic cylinder three, 11-pressing block, 12-telescopic cylinder four, 13-cutter, 14-storage box, 15-bump, 16-screen. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. Example

[0026] A circuit board screen printer auxiliary device, such as Figure 1-Figure 4 As shown, it includes a U-shaped block 1, a connecting block 2, a distance sensor 3, a telescopic cylinder 1 4, a telescopic cylinder 2 5, a push block 6, a driving assembly and a fixing assembly; two U-shaped blocks 1 are provided, and the U-shaped blocks 1 are set to an alloy material; each U-shaped block 1 is bolted with a connecting block 2; each connecting block 2 is bolted with a distance sensor 3; each U-shaped block 1 is bolted with a telescopic cylinder 4; the telescopic end of each telescopic cylinder 4 is fixedly connected with a telescopic cylinder 2 5; the telescopic end of each telescopic cylinder 2 5 is fixedly connected with a push block 6, and the push block 6 is in contact with the corresponding U-shaped block 1; an electromagnet is provided on the inner side of each push block 6; the U-shaped block 1 is connected with a driving assembly, and the driving assembly is used to drive the U-shaped block 1 to perform horizontal linear motion; the U-shaped block 1 is connected with a fixing assembly, and the fixing assembly is used to fix the mesh plate 16.

[0027] The driving assembly includes an electric slide rail 7, an electric slider 8 and a connecting block 2 9; two electric slide rails 7 are arranged on the U-shaped block 1; each electric slide rail 7 is slidably connected to an electric slider 8; each electric slider 8 is fixedly connected to a connecting block 2 9, the connecting block 2 9 is bolted to the corresponding U-shaped block 1, the connecting block 2 9 is set to an alloy material, the electric slider 8 drives the connecting block 2 9 to move left and right, and the connecting block 2 9 drives the U-shaped block 1 to move left and right.

[0028] The fixing assembly includes a telescopic cylinder three 10 and a pressure block 11; each U-shaped block 1 is bolted to two telescopic cylinders three 10; a pressure block 11 is fixed to the telescopic end of each telescopic cylinder three 10, and the telescopic cylinder three 10 drives the pressure block 11 to move downward to press the mesh plate 16.

[0029] It also includes a cleaning component; the cleaning component is connected to the U-shaped block 1; the cleaning component includes a telescopic cylinder four 12, a cutter 13 and a storage box 14; each U-shaped block 1 is bolted to a telescopic cylinder four 12; the telescopic end of each telescopic cylinder four 12 is detachably connected to a cutter 13, the cutter 13 is slidably connected to the corresponding U-shaped block 1, and the impurities remaining on the rear side of the mesh plate 16 are scraped off by the cutter 13; each U-shaped block 1 is pluggably connected to a storage box 14, and the scraped impurities are collected by the storage box 14.

[0030] A protrusion 15 is also included; each storage box 14 is welded with a protrusion 15 to facilitate manual pulling out of the storage box 14.

[0031] First, the electric slide rail 7 and the electric slider 8 are started, the electric slider 8 drives the connecting block 2 9 to move, and the connecting block 2 9 drives the U-shaped block 1 to move, so that the two U-shaped blocks 1 move toward or away from each other, so that the distance between the two U-shaped blocks 1 is slightly larger than the mesh plate 16, and then the mesh plate 16 is manually inserted between the two U-shaped blocks 1. At this time, the state of the mesh plate 16 is as follows: Figure 1As shown, the mesh plate 16 is then pushed back manually until the mesh plate 16 contacts the connecting block 1 2, and then the two U-shaped blocks 1 are controlled by the electric slider 8 to move toward each other, so that the two U-shaped blocks 1 clamp and position the mesh plate 16. At this time, the front-to-back direction of the mesh plate 16 is parallel to the axial direction of the U-shaped block 1, and the positioning operation of the angle and the left-right position of the mesh plate 16 is completed. If the edge of the mesh plate 16 is not parallel to the axial direction of the U-shaped block 1 before this, the U-shaped block 1 will cause an offset phenomenon during the process of tightening the positioning of the mesh plate 16, causing the mesh plate 16 to move away from the connecting block 1 2, thereby causing the front-to-back positioning of the mesh plate 16 to fail, and then the telescopic cylinder 2 5 drives the push block 6 to move to the front of the mesh plate 16, and then the telescopic cylinder 1 4 drives the telescopic cylinder 2 5 to move backward, and the telescopic cylinder 2 5 drives the push block 6 to move backward to contact the mesh plate 16. The push block 6 continues to push the screen 16 backward. During this process, the distance between the screen 16 and the connecting block 2 is monitored by the distance sensor 3. When the distance between the screen 16 and the connecting block 2 is zero, it means that the screen 16 is in contact with the connecting block 2 again, so that the front and rear directions of the screen 16 are positioned, and then the telescopic cylinder 3 10 is started. The telescopic cylinder 3 10 drives the pressure block 11 to move downward, so that the pressure block 11 presses and fixes the screen 16, and the installation operation of the screen 16 is completed. When in use, after the U-shaped block 1 clamps and positions the inclined screen 16, the offset distance of the screen 16 is detected by the distance sensor 3, and then the front and rear positions of the screen 16 are repositioned by the push block 6, thereby avoiding the problem of interference with the screen printing operation due to the offset phenomenon when the U-shaped block 1 clamps and positions the inclined screen 16.

[0032] When the distance sensor 3 monitors the distance between the screen plate 16 and the connecting block 2, if there are impurities such as hardened silk-screen materials remaining on the rear side of the screen plate 16, the distance monitored by the distance sensor 3 is less than the actual value, which interferes with the front and rear positioning operation of the screen plate 16. Therefore, when the push block 6 contacts the rear side of the screen plate 16, the electromagnet inside the push block 6 begins to generate magnetic force, and the frame of the screen plate 16 is set to an iron alloy material, so that the electromagnet uses magnetic force to suck the screen plate 16 tightly onto the push block 6, and then the push block 6 is controlled by the telescopic cylinder 4 to move in the front and rear directions. The push block 6 drives the screen plate 16 to move forward or backward, so that the rear side of the screen plate 16 is aligned with the front side of the cutter 13, and then the telescopic cylinder 4 12 drives the cutter 13 to move downward, so that the cutter 1 3 scrapes off the impurities remaining on the rear side of the mesh plate 16, and the scraped impurities fall into the storage box 14, then the telescopic cylinder 4 12 drives the cutter 13 to move back to its original position, and then the push block 6 pushes the mesh plate 16 to move backward, and the distance between the mesh plate 16 and the connecting block 2 is monitored by the distance sensor 3. When the distance between the mesh plate 16 and the connecting block 2 is zero, it means that the mesh plate 16 and the connecting block 2 are re-contacted, so as to position the mesh plate 16 in the front and rear directions. When in use, the impurities remaining on the rear side of the mesh plate 16 are scraped off by the cutter 13, avoiding the problem that the distance monitored by the distance sensor 3 is less than the actual value due to the impurities remaining on the rear side of the mesh plate 16, thereby avoiding the problem of the mesh plate 16 positioning failure being avoided.

[0033] During regular maintenance, the protrusion 15 is manually pulled to move, and the storage box 14 is pulled out from the U-shaped block 1 through the protrusion 15, and then the impurities in the storage box 14 are cleared out. When in use, the storage box 14 can be quickly taken out for cleaning by manually pulling the protrusion 15, which is very convenient.

[0034] A circuit board screen printing process includes the following steps:

[0035] Step 1: pickling: spraying pickling solution on the surface of the circuit board through a fan-shaped nozzle to pickle the circuit board;

[0036] Step 2: grinding the board, grinding the surface of the circuit board by sandblasting to increase the roughness of the surface of the circuit board;

[0037] Step 3: Cleaning: Clean the circuit board after grinding;

[0038] Step 4: drying, drying the cleaned circuit board;

[0039] Step 5: Install the screen 16 on the screen printer using the circuit board screen printer auxiliary device;

[0040] Step six: silk screen printing, silk screen printing on the circuit board.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the protection scope of the utility model. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A circuit board screen printer auxiliary device, characterized by: The invention comprises a U-shaped block (1), a connecting block 1 (2), a distance sensor (3), a telescopic cylinder 1 (4), a telescopic cylinder 2 (5), a push block (6), a driving assembly and a fixing assembly; at least two U-shaped blocks (1) are provided; each U-shaped block (1) is fixedly connected to a connecting block 1 (2); each connecting block 1 (2) is fixedly connected to a distance sensor (3); each U-shaped block (1) is fixedly connected to a telescopic cylinder 1 (4); the telescopic end of each telescopic cylinder 1 (4) is fixedly connected to a telescopic cylinder 2 (5); the telescopic end of each telescopic cylinder 2 (5) is fixedly connected to a push block (6), the push block (6) is in contact with the corresponding U-shaped block (1); each push block (6) is provided with an electromagnet on the inner side; the U-shaped block (1) is connected to a driving assembly, the driving assembly is used to drive the U-shaped block (1) to perform horizontal linear motion; the U-shaped block (1) is connected to a fixing assembly, the fixing assembly is used to fix the mesh plate (16).

2. A circuit board screen printer auxiliary device according to claim 1, characterized in that: The driving assembly comprises an electric slide rail (7), an electric slider (8) and a second connecting block (9); at least two electric slide rails (7) are arranged on the U-shaped block (1); each electric slide rail (7) is slidably connected to an electric slider (8); each electric slider (8) is fixedly connected to a second connecting block (9), and the second connecting block (9) is fixedly connected to the corresponding U-shaped block (1).

3. The circuit board screen printer auxiliary device according to claim 1, characterized in that: The fixing assembly comprises a telescopic cylinder three (10) and a pressing block (11); at least two telescopic cylinders three (10) are fixedly connected to each U-shaped block (1); and a pressing block (11) is fixedly connected to the telescopic end of each telescopic cylinder three (10).

4. A circuit board screen printer auxiliary device according to claim 3, characterized in that: The cleaning assembly is also included; the cleaning assembly is connected to the U-shaped block (1); the cleaning assembly includes a telescopic cylinder (12), a cutter (13) and a storage box (14); each U-shaped block (1) is fixedly connected to a telescopic cylinder (12); the telescopic end of each telescopic cylinder (12) is detachably connected to a cutter (13), and the cutter (13) is slidably connected to the corresponding U-shaped block (1); each U-shaped block (1) is pluggably connected to a storage box (14).

5. A circuit board screen printer auxiliary device according to claim 4, characterized in that: It also includes a protrusion (15); each storage box (14) is fixedly connected to a protrusion (15).

Images