CN111907199A - Solder paste printing machine capable of automatically moving steel mesh - Google Patents

Abstract

The invention discloses a solder paste printing machine for automatically moving a steel mesh. A steel mesh moving frame is arranged between them, a steel mesh is placed on the steel mesh moving frame, and a steel mesh moving module is arranged on the inner side of the first beam, and the steel mesh moving module drives the steel mesh to move. The steel mesh moving frame moves left and right. The invention realizes the automatic movement of the steel mesh through the steel mesh moving module, and the scraper also moves synchronously when the steel mesh is moved. The solder paste drips on the stencil where it is forbidden to drop, which will lead to poor printing. At the same time, the present invention does not require manual operation, has high moving precision, and can effectively prevent bad printing caused by the movement of the stencil.

Description

A solder paste printing machine with automatic stencil transfer

technical field

The invention relates to the technical field of printing machines, in particular to a solder paste printing machine that automatically moves a steel mesh.

Background technique

With the increasing precision and miniaturization of electronic products, the production of PCB (Printed Circuit Board, printed circuit board) of electronic products must be completed by SMT (Surface Mount Technology, surface mount technology) equipment. In the SMT process manufacturing process, solder paste The printing process is a very critical part, and the solder paste printing process is done by a solder paste printer.

Modern solder paste printing machines are generally composed of plates, solder paste, embossing, circuit board transmission and other mechanisms. Its working principle is to first fix the circuit board to be printed on the printing positioning table, and then the left and right scrapers of the printing machine will leak the solder paste or red glue to the corresponding pad through the stencil. input to the placement machine for automatic placement.

However, the existing solder paste printing machine does not have the function of automatically moving the stencil when replacing the stencil. Now, when the stencil needs to be moved to replace the stencil, the operator needs to move it manually, and the scraper does not move together with the stencil. , the solder paste on the squeegee will drop on the stencil where the dripping is prohibited, which will cause poor printing. Based on the above situation, the present invention provides a device for automatically moving the stencil and the squeegee.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the present invention provides a solder paste printing machine that automatically moves the stencil.

The technical scheme of the present invention is as follows:

A solder paste printing machine for automatically moving a steel mesh, which is characterized in that it includes a frame, a first beam and a second beam are symmetrically arranged on both sides of the top of the frame, and the first beam and the second beam are A steel mesh moving frame is arranged between them, a steel mesh is placed on the steel mesh moving frame, and a steel mesh moving module is arranged on the inner side of the first beam, and the steel mesh moving module drives the steel mesh to move. The steel mesh moving frame moves left and right.

According to the present invention of the above scheme, the two sides of the steel mesh moving frame are respectively fixed to the lower ends of the inner sides of the first beam and the second beam, and the steel mesh moving module is located at the bottom of the steel mesh moving frame. above.

According to the present invention of the above solution, the steel mesh moving module comprises a first motor, a first screw rod, a first screw rod slider, a vertical cylinder and a horizontal cylinder, and the first motor is fixed on the first beam On the inner side of the first screw, the first motor is connected with the first screw rod and drives the first screw rod to rotate, and the first screw rod slider is sleeved on the threaded section of the first screw rod and Move left and right along the threaded section of the first screw rod, the first screw rod slider is fixed with the vertical cylinder, the horizontal cylinder is fixed with the movable end of the vertical cylinder, and the horizontal cylinder is fixed with the movable end of the vertical cylinder. The movable end faces the movable end of the vertical cylinder, and the movable end of the transverse cylinder and the movable end of the vertical cylinder clamp the frame edge of the steel mesh.

Further, the vertical air cylinder is fixed to the first lead screw slider through a vertical cylinder seat, and the horizontal air cylinder is fixed to the movable end of the vertical air cylinder through a horizontal cylinder seat.

Further, a first sliding block is provided on the side opposite to the inner side of the first cross beam, and the inner side of the first cross beam is provided with the first sliding block. With the matching first linear guide rail, the first screw slider moves left and right along the first linear guide rail through the first slider.

Further, the output shaft of the first motor is connected with the first screw rod through a first coupling and drives the first screw rod to rotate.

Further, a first bracket and a second bracket are arranged on the inner side of the first beam, one end of the first screw rod is arranged on the first bracket through the first rotating shaft, and the first screw rod is The other end is disposed on the second bracket through the second rotating shaft, and the first motor is fixed on the inner side of the first beam through the first bracket.

Further, the first screw slider is provided with a first nut moving pair matched with the threaded segment of the first screw, and the first screw slider is connected to the first screw moving pair through the first nut moving pair. The threaded segments of the first lead screw are connected.

According to the present invention of the above scheme, a scraper module and a scraper moving module are arranged on the tops of the first beam and the second beam, and the scraper moving module drives the scraper module to move the scraper module between the first beam and the second beam. Move left and right on the second beam.

Further, the scraper moving module includes a second motor, a second screw and a second screw slider, the second motor is fixed on the top of the first beam, and the second motor is connected to the first The two screw rods are connected and drive the second screw rod to rotate. The second screw rod slider is sleeved on the threaded section of the second screw rod and moves left and right along the threaded section of the second screw rod. The second screw slider is fixed with the scraper module.

Further, the top of the first beam is provided with a second linear guide rail, the top of the second beam is provided with a third linear guide rail, and one side of the scraper module is slidably connected to the second linear guide rail, The other side of the scraper module is slidably connected with the third linear guide rail.

Further, a second sliding block matched with the second linear guide rail is provided at the bottom of one side of the scraper module, and one side of the scraper module is connected to the second sliding block through the second sliding block. Linear guide sliding connection;

The bottom of the other side of the scraper module is provided with a third slider matched with the third linear guide rail, and the other side of the scraper module passes through the third slider and the third linear guide. Slide to connect.

Further, the output shaft of the second motor is connected to the second screw rod through a second coupling and drives the second screw rod to rotate.

Further, the top of the first beam is provided with a third bracket and a fourth bracket, one end of the second screw rod is set on the third bracket through the third rotating shaft, and the other side of the second screw rod is arranged on the third bracket. One end is disposed on the fourth bracket through a fourth rotating shaft, and the second motor is fixed on the top of the first beam through the third bracket.

Further, the second screw slider is provided with a second nut motion pair that matches the threaded segment of the second screw, and the second screw slider passes through the second female motion pair. connected with the threaded section of the second lead screw.

According to the present invention of the above solution, the four corners of the bottom of the frame are provided with foot pads.

The beneficial effects of the present invention are:

1. The present invention realizes the automatic moving of the steel mesh through the steel mesh moving module, without manual operation, and has high moving precision, which can effectively improve the printing efficiency and printing quality of the solder paste printing machine, and at the same time drive the scraper module through the scraper moving module. It moves synchronously with the stencil, so that the residual solder paste on the scraper of the squeegee module will not fall on other parts of the stencil, preventing the solder paste from falling on the printing area of the stencil and affecting the printing quality;

2. The steel mesh moving module of the present invention has a simple and stable structure, and can stably drive the steel mesh to move on the steel mesh moving frame;

3. The present invention enables the first screw slider to move stably along the threaded section of the first screw through the first slider and the first linear guide rail, further ensuring the overall stability of the steel mesh moving module;

4. The scraper moving module of the present invention has a simple and stable structure, and can stably drive the scraper module belt to move;

5. The present invention enables the scraper module to move stably on the first beam and the second beam through the second slider, the third slider, the second linear guide and the third linear guide;

6. The four corners of the bottom of the frame of the present invention are provided with foot pads, so that the double-track solder paste printer can be stably placed on the ground plane, thereby increasing the overall stability of the equipment.

Description of drawings

1 is a schematic structural diagram of an embodiment of the present invention;

2 is a schematic diagram of the connection between the first beam, the second beam, the steel mesh, the steel mesh moving frame and the steel mesh moving module according to an embodiment of the present invention;

Fig. 3 is an enlarged view of part A in Fig. 2;

4 is a schematic structural diagram of a steel mesh moving module according to an embodiment of the present invention;

5 is a schematic structural diagram of a first beam according to an embodiment of the present invention;

6 is a schematic structural diagram of a second beam according to an embodiment of the present invention;

7 is a schematic structural diagram of a scraper moving module according to an embodiment of the present invention;

8 is a schematic structural diagram of a scraper module according to an embodiment of the present invention;

In the picture,

1. Rack; 101. Foot pads;

2. The first beam; 201, the first linear guide; 202, the first bracket; 203, the second bracket; 204, the second linear guide; 205, the third bracket; 206, the fourth bracket;

3. The second beam; 301. The third linear guide rail;

4. Steel mesh moving frame; 401. The first steel mesh moving frame; 402, The second steel mesh moving frame;

5. Steel mesh;

6. Steel mesh moving module; 601, the first motor; 602, the first screw; 603, the first screw slider; 604, the vertical cylinder; 605, the horizontal cylinder; 6011, the first coupling; 6041 , vertical cylinder seat; 6031, first slider; 6032, first nut motion pair; 6041, vertical cylinder seat; 6051, horizontal cylinder seat;

7. Scraper module; 701, the second slider; 702, the third slider;

8. Scraper moving module; 801, the second motor; 802, the second screw; 803, the second screw slider; 8011, the second coupling; 8031, the second nut moving pair.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

It should be noted that when a component is referred to as being "disposed on" or "fixed on" or "sleeved on" or "placed on" or "connected to" another component, it can be directly or indirectly located on the other component . The orientations or positions indicated by the terms "upper", "lower", "left", "right", "inside", etc. are based on the orientations or positions shown in the accompanying drawings, which are only for the convenience of description and should not be construed as a reference to the technical solution. limit. The terms "first", "second", "third" and "fourth" are only used for the purpose of description, and should not be understood as indicating or implying relative importance or implying the number of technical features.

Please refer to FIG. 1 and FIG. 2 , an embodiment of the present invention provides a solder paste printing machine for automatically moving stencils, including a frame 1, and a first beam 2 and a second beam 3 are symmetrically arranged on both sides of the top of the frame 1 , between the first cross beam 2 and the second cross beam 3, a steel mesh moving frame 4 is arranged, and the two sides of the steel mesh moving frame 4 are respectively fixed at the lower end of the inner side of the first cross beam 2 and the second cross beam 3, and the steel mesh moving frame 4 A steel mesh 5 is placed on it, the inner side of the first beam 2 is provided with a steel mesh moving module 6, the steel mesh moving module 6 is located above the steel mesh moving frame 4, and the steel mesh moving module 6 drives the steel mesh 5 to move on the steel mesh. The net moving frame 4 moves left and right. The present invention realizes the automatic movement of the stencil 5 through the stencil moving module 6, does not require manual operation, has high movement precision, and can effectively improve the printing efficiency and printing quality of the solder paste printing machine.

Please refer to FIG. 2 to FIG. 5 , in this embodiment, the steel mesh moving module 6 includes a first motor 601 , a first screw rod 602 , a first screw rod slider 603 , a vertical cylinder 604 and a horizontal cylinder 605 . A motor 601 is fixed on the inner side of the first beam 2 . The first motor 601 is connected with the first screw rod 602 and drives the first screw rod 602 to rotate. The first screw rod slider 603 is sleeved on the first screw rod 602 The threaded section moves left and right along the threaded section of the first lead screw 602, the first lead screw slider 603 is fixed to the vertical cylinder 604, the lateral cylinder 605 is fixed to the movable end of the vertical cylinder 604, and the movable end of the lateral cylinder 605 Facing the movable end of the vertical cylinder 604 , the movable end of the horizontal cylinder 605 and the movable end of the vertical cylinder 604 clamp the frame edge of the steel mesh 5 . When the first motor 601 is started, the first motor 601 drives the first lead screw 602 to rotate, and the first lead screw slider 603 moves left and right along the threaded section of the first lead screw 602 through thread transmission. It is fixed with the vertical cylinder 604, and the horizontal cylinder 605 is fixed with the movable end of the vertical cylinder 604. When the first screw slider 603 moves, it drives the vertical cylinder 604 and the lateral cylinder 605 to move synchronously. When the first screw slider 603 moves When the frame edge of the steel mesh 5 is reached, the movable end of the vertical air cylinder 604 moves downward, and the horizontal air cylinder 605 will follow the movable end of the vertical air cylinder 604 to descend and get stuck on the frame edge of the steel mesh 5, and then the movement of the lateral air cylinder 605. The frame edge of the steel mesh 5 is pressed outward from the end, and the frame edge of the steel plate is clamped under the interaction between the movable end of the horizontal cylinder 605 and the movable end of the vertical cylinder 604, and then the first screw slider 603 is moved, The steel mesh 5 will move synchronously with the first lead screw slider 603 . The steel mesh moving module 6 of the present invention has a simple and stable structure, and can stably drive the steel mesh 5 to move on the steel mesh moving frame 4 .

Referring to FIGS. 3 and 4 , in a preferred embodiment, the vertical cylinder 604 is fixed to the first screw slider 603 through the vertical cylinder base 6041 , and the horizontal cylinder 605 is connected to the vertical cylinder 604 through the horizontal cylinder base 6051 . The movable end is fixed. The above-mentioned vertical cylinder base 6041 and lateral cylinder base 6051 are arranged so that the vertical cylinder 604 can be stably fixed on the first screw slider 603, and the lateral cylinder base 6051 can be stably fixed on the vertical cylinder 604. The vertical cylinder 604 and the horizontal cylinder 605 are stably driven to move synchronously when the first screw slider 603 moves, so as to further ensure the overall stability of the steel mesh moving module 6 .

Please refer to FIG. 4 and FIG. 5 , in a preferred embodiment, a first slider 6031 is provided on the opposite side of the first screw slider 603 and the inner side of the first beam 2 , and the inner side of the first beam 2 is provided with a first slider 6031 There is a first linear guide 201 matched with the first slider 6031, the first screw slider 603 moves left and right along the first linear guide 201 through the first slider 6031, the first slider 6031 and The arrangement of the first linear guide 201 enables the first screw slider 603 to move left and right along the threaded section of the first screw 602 stably, further ensuring the overall stability of the steel mesh moving module 6 .

Referring to FIG. 4 , in a preferred embodiment, the output shaft of the first motor 601 is connected to the first screw rod 602 through a first coupling 6011 and drives the first screw rod 602 to rotate. The first coupling 6011 The setting of 1 can realize the stable connection between the output shaft of the first motor 601 and the first screw rod 602 , and further ensure the overall stability of the steel mesh moving module 6 .

Please refer to FIG. 4 and FIG. 5. In a preferred embodiment, a first bracket 202 and a second bracket 203 are provided on the inner side of the first beam 2, and one end of the first screw rod 602 passes through the first rotating shaft (not shown in the figure). shown) is arranged on the first bracket 202 , the other end of the first screw rod 602 is arranged on the second bracket 203 through a second rotating shaft (not shown in the figure), and the first motor 601 is fixed on the first bracket 202 through the first bracket 202 On the inner side of the beam 2, the arrangement of the above-mentioned first bracket 202 and the second bracket 203 can make the first motor 601 and the first screw rod 602 stably fixed on the inner side of the first beam 2, and further ensure the steel mesh moving mold. Overall stability of group 6.

Referring to FIG. 4 , in a preferred embodiment, the first screw slider 603 is provided with a first nut moving pair 6032 that is matched with the threaded section of the first screw 602 , and the first screw slider 603 passes through The first nut moving pair 6032 is connected with the threaded section of the first screw rod 602. When the first screw rod 602 rotates, the first nut moving pair 6032 on the first screw rod 602 is driven along the threaded section of the first screw rod 602 through the thread. Move left and right, and drive the first screw slider 603 to move left and right. In another embodiment, the first lead screw slider 603 may also be connected to the threaded section of the first lead screw 602 through the first ball screw pair, which can be selected by those skilled in the art according to actual conditions.

Please refer to FIG. 5 and FIG. 6. In a preferred embodiment, the steel mesh moving frame 4 includes two oppositely arranged first steel mesh moving frame 401 and second steel mesh moving frame 402, and the first steel mesh moving frame 401 is fixed At the lower end of the inner side of the first beam 2, the second steel mesh moving frame 402 is fixed on the lower end of the inner side of the second beam 3, one side of the steel mesh 5 is placed on the first steel mesh moving frame 401, and the other side of the steel mesh 5 is placed on the first steel mesh moving frame 401. One side is placed on the second steel mesh moving frame 402 , and the steel mesh moving module 6 drives the steel mesh 5 to move left and right on the first steel mesh moving frame 401 and the second steel mesh moving frame 402 .

Please refer to FIG. 1 , in this embodiment, a scraper module 7 and a scraper moving module 8 are arranged on the tops of the first beam 2 and the second beam 3 , and the scraper moving module 8 drives the scraper module 7 on the first beam 2 and the scraper moving module 8 . The second beam 3 moves up and down, and the scraper module 7 is driven by the scraper moving module 8 to move synchronously with the stencil 5, so that the residual solder paste on the scraper of the scraper module 7 will not fall on other parts of the stencil 5 , to avoid the solder paste falling on the printing area of the stencil 5 and affecting the printing quality.

Please refer to FIGS. 7 and 8. In a preferred embodiment, the scraper moving module 8 includes a second motor 801, a second screw 802 and a second screw slider 803, and the second motor 801 is fixed on the first beam 2, the second motor 801 is connected with the second screw 802 and drives the second screw 802 to rotate, and the second screw slider 803 is sleeved on the threaded section of the second screw 802 and follows the second screw The threaded section of 802 moves left and right, and the second screw slider 803 is fixed to the scraper module 7 . When the second motor 801 is activated, the second motor 801 drives the second screw rod 802 to rotate, and the second screw rod slider 803 moves left and right along the threaded section of the second screw rod 802 through thread transmission. It is fixed with the scraper module 7, and the second screw slider 803 moves the scraper module 7 to move synchronously. The scraper moving module 8 of the present invention has a simple and stable structure, and can stably drive the scraper module 7 to move.

Please refer to FIGS. 5 and 6 , in a preferred embodiment, the top of the first beam 2 is provided with a second linear guide 204 , the top of the second beam 3 is provided with a third linear guide 301 , and a The side is slidably connected with the second linear guide 204 , and the other side of the scraper module 7 is slidably connected with the third linear guide 301 . Specifically, the bottom of one side of the scraper module 7 is provided with a second slider 701 matched with the second linear guide 204, and one side of the scraper module 7 is slidably connected to the second linear guide 204 through the second slider 701; The bottom of the other side of the scraper module 7 is provided with a third slider 702 matched with the third linear guide 301, and the other side of the scraper module 7 is slidably connected to the third linear guide 301 through the third slider 702. The above-mentioned The arrangement of the second slider 701 , the third slider 702 , the second linear guide 204 and the third linear guide 301 enables the scraper module 7 to move left and right on the first beam 2 and the second beam 3 stably.

Referring to FIG. 7, in a preferred embodiment, the output shaft of the second motor 801 is connected to the second screw rod 802 through a second coupling 8011 and drives the second screw rod 802 to rotate. The second coupling 8011 The setting of 1 can realize the stable connection between the output shaft of the second motor 801 and the second screw rod 802 , and further ensure the overall stability of the scraper moving module 8 .

5 and 7, in a preferred embodiment, the top of the first beam 2 is provided with a third bracket 206 and a fourth bracket 207, and one end of the second screw rod 802 passes through a third rotating shaft (not shown in the figure). ) is arranged on the third bracket 206 , the other end of the second screw 802 is arranged on the fourth bracket 207 through a fourth rotating shaft (not shown), and the second motor 801 is fixed to the first beam 2 through the third bracket 206 The arrangement of the third bracket 206 and the fourth bracket 207 can make the second motor 801 and the second screw rod 802 stably fixed on the top of the first beam 2, and further ensure the overall stability of the scraper moving module 8.

Referring to FIG. 7 , in a preferred embodiment, the second screw slider 803 is provided with a second nut motion pair 8031 which is matched with the threaded segment of the second screw 802 , and the second screw slider 803 passes through the second screw slider 803 . The second nut moving pair 8031 is connected to the threaded section of the second lead screw 802. When the second lead screw 802 rotates, the second nut moving pair 8031 on the second lead screw 802 is driven along the threaded section of the second lead screw 802 through the thread. Move left and right, and drive the second screw slider 803 to move left and right. In another embodiment, the second lead screw slider 803 may also be connected to the threaded section of the second lead screw 802 through a second ball screw pair, which can be selected by those skilled in the art according to actual conditions.

In this embodiment, the present invention does not limit the specific structure of the scraper module 7, and those skilled in the art can select it according to the actual situation.

Referring to FIG. 1 , in this embodiment, four corners of the bottom of the rack 1 are provided with foot pads 101 , so that the solder paste printer can be stably placed on the ground plane, thereby increasing the overall stability of the device.

The working principle of the present invention:

The first motor 601 is activated, the first motor 601 drives the first screw rod 602 to rotate, and the first screw rod slider 603 moves left and right along the threaded section of the first screw rod 602 and the first linear guide 201 through thread transmission. The first screw slider 603 is fixed with the vertical cylinder 604, and the horizontal cylinder 605 is fixed with the movable end of the vertical cylinder 604. When the first screw slider 603 moves, the vertical cylinder 604 and the lateral cylinder 605 are moved synchronously. When the screw slider 603 moves to the frame edge of the steel mesh 5, the movable end of the vertical air cylinder 604 moves downward, and the horizontal air cylinder 605 will follow the movable end of the vertical air cylinder 604 to descend and get stuck on the frame edge of the steel mesh 5. Then the movable end of the horizontal cylinder 605 presses out the frame edge against the steel mesh 5, and the frame edge of the steel plate is clamped under the interaction between the movable end of the horizontal cylinder 605 and the movable end of the vertical cylinder 604, and then the first wire is moved. When the rod slider 603 is moved, the steel mesh 5 will move synchronously with the first screw slider 603;

While the steel mesh 5 is moving, the second motor 801 is activated, the second motor 801 drives the second screw rod 802 to rotate, and the second screw rod slider 803 moves left and right along the threaded section of the second screw rod 802 through the screw drive. The second screw slider 803 is fixed with the scraper module 7, and the second screw slider 803 drives the scraper module 7 to move synchronously when moving. It is only necessary to control the rotation speeds of the first motor 601 and the second motor 801 to make the The scraper module 7 and the steel mesh 5 move synchronously.

The beneficial effects of the present invention are:

1. The present invention realizes the automatic movement of the stencil 5 through the stencil moving module 6, which does not require manual operation and has high moving precision, which can effectively improve the printing efficiency and printing quality of the solder paste printing machine. The squeegee module 7 moves synchronously with the stencil 5, so that the residual solder paste on the squeegee of the squeegee module 7 will not fall on other parts of the stencil 5, so as to avoid the solder paste falling on the printing area of the stencil 5 and affecting the printing quality;

2. The steel mesh moving module 6 of the present invention has a simple and stable structure, and can stably drive the steel mesh 5 to move on the steel mesh moving frame 4;

3. The present invention enables the first screw slider 603 to move stably along the threaded section of the first screw rod 602 through the first slider 6031 and the first linear guide 201, further ensuring the integrity of the steel mesh moving module 6 stability;

4. The scraper moving module 8 of the present invention has a simple and stable structure, and can stably drive the scraper module 7 to move;

5. The present invention enables the scraper module 7 to move stably on the first beam 2 and the second beam 3 through the second slider 701, the third slider 702, the second linear guide 204 and the third linear guide 301;

6. The four corners of the bottom of the frame 1 of the present invention are provided with foot pads, so that the double-track solder paste printer can be stably placed on the ground plane, thereby increasing the overall stability of the equipment.

It should be understood that, for those skilled in the art, improvements or changes can be made according to the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present invention.

The patent of the present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the realization of the patent of the present invention is not limited by the above methods, as long as various improvements made by the method concept and technical solutions of the patent of the present invention are adopted, or no improvement is made. It is within the protection scope of the present invention to directly apply the concepts and technical solutions of the patent of the present invention to other occasions.

Claims (10)

1. A solder paste printing machine for automatically moving a steel mesh, characterized in that it comprises a frame, and the top two sides of the frame are symmetrically provided with a first beam and a second beam, the first beam and the A steel mesh moving frame is arranged between the two beams, a steel mesh is placed on the steel mesh moving frame, and a steel mesh moving module is arranged on the inner side of the first beam, and the steel mesh moving module drives the steel mesh. The net moves left and right on the steel mesh moving frame. 2 . The solder paste printer for automatically moving stencils according to claim 1 , wherein both sides of the stencil moving frame are respectively fixed on the lower ends of the inner sides of the first beam and the second beam. 2 . , the steel mesh moving module is located above the steel mesh moving frame. 3. The solder paste printing machine for automatically moving the stencil according to claim 1, wherein the stencil moving module comprises a first motor, a first lead screw, a first lead screw slider, and a vertical cylinder and a horizontal cylinder, the first motor is fixed on the inner side of the first beam, the first motor is connected with the first screw rod and drives the first screw rod to rotate, the first screw rod The slider is sleeved on the threaded section of the first screw rod and moves left and right along the threaded section of the first screw rod. The first screw rod slider is fixed with the vertical cylinder, and the horizontal cylinder It is fixed with the movable end of the vertical cylinder, the movable end of the transverse cylinder faces the movable end of the vertical cylinder, and the movable end of the transverse cylinder and the movable end of the vertical cylinder clamp the steel mesh border of the frame. 4 . The solder paste printing machine with automatic stencil shifting according to claim 3 , wherein the vertical cylinder is fixed to the first screw slider by a vertical cylinder seat, and the horizontal cylinder is fixed by a horizontal cylinder. 5 . The cylinder seat is fixed with the movable end of the vertical cylinder. 5 . The solder paste printer with automatic stencil shifting according to claim 3 , wherein a first slider is provided on the side opposite to the inner side of the first cross beam and the first screw slider. 6 . , the inner surface of the first beam is provided with a first linear guide rail matched with the first slider, and the first screw slider passes the first slider along the first straight The wire guide moves left and right. 6. The solder paste printing machine for automatically moving the stencil according to claim 1, wherein a scraper module and a scraper moving module are arranged on the tops of the first beam and the second beam, and the scraper moves The module drives the scraper module to move left and right on the first beam and the second beam. 7 . The solder paste printing machine for automatically moving the stencil according to claim 6 , wherein the scraper moving module comprises a second motor, a second screw and a second screw slider, and the second The motor is fixed on the top of the first beam, the second motor is connected with the second screw rod and drives the second screw rod to rotate, and the second screw rod slider is sleeved on the second screw rod The threaded section of the rod moves left and right along the threaded section of the second screw rod, and the second screw rod slider is fixed with the scraper module. 8 . The solder paste printing machine with automatic steel mesh moving according to claim 7 , wherein a second linear guide rail is provided on the top of the first beam, and a third linear guide rail is provided on the top of the second beam. 9 . One side of the scraper module is slidably connected with the second linear guide rail, and the other side of the scraper module is slidably connected with the third linear guide rail. 9 . The solder paste printing machine with automatic stencil shifting according to claim 8 , wherein a second sliding block matched with the second linear guide rail is provided at the bottom of one side of the squeegee module. 10 . One side of the scraper module is slidably connected to the second linear guide rail through the second slider; The bottom of the other side of the scraper module is provided with a third slider matched with the third linear guide rail, and the other side of the scraper module passes through the third slider and the third linear guide. Slide to connect. 10 . The solder paste printer for automatically moving the stencil according to claim 1 , wherein four corners of the bottom of the frame are provided with foot pads. 11 .

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