Novel steel mesh wiping and cleaning mechanism applied to printing machine

Abstract

The novel steel mesh wiping and cleaning mechanism applied to the printing machine comprises a cleaning assembly, and the cleaning assembly comprises a mounting base, a wiping paper supply roller, a recovery motor, a wiping paper recovery roller and two mounting grooves; and the wiping paper supply roller and the wiping paper recovery roller are rotationally connected to the interior of the mounting seat. The steel mesh is wiped through the rubber strip, the wiping effect can be further improved in combination with high-pressure gas blown out by the air blowing pipe, wet wiping can be conducted through alcohol sprayed out by the alcohol spraying pipe, in the reciprocating wiping process, the alcohol on the steel mesh can be rapidly volatilized through the vacuum box and the air blowing pipe, meanwhile, impurities cleaned by the steel mesh are removed, and the wiping effect is improved. According to the steel mesh cleaning device, the three wiping modes of dry wiping, wet wiping and vacuum wiping are integrated, the cleaning effect on the steel mesh is improved, and tin powder residues at the bottom of the steel mesh are avoided.

Description

Technical Field

[0001] The utility model relates to a steel mesh cleaning mechanism, specifically a new wiping and cleaning steel mesh mechanism applied to a printing machine, belonging to the technical field of steel mesh cleaning mechanisms. Background Technique

[0002] The main process points in the SMT production process include solder paste printing, solder paste inspection, chip mounting, reflow soldering, and appearance inspection after soldering. According to relevant data statistics and analysis, 50-60% of SMT defects come from the printing process point. Among them, the steel mesh is an indispensable tool for printing equipment and is also one of the main factors affecting the generation of printing defects.

[0003] The steel mesh, that is, the SMT template, is a special SMT mold. Its main function is to transfer an accurate amount of solder paste to the correct position on the empty PCB. The steel mesh was originally made of wire mesh, so it was called the stencil at that time. With the development of SMT and the increasing requirements for the stencil, most steel meshes are now made by laser cutting of stainless steel sheets. After long-term printing, the steel mesh needs to be effectively wiped. By wiping, the following purposes can be achieved:

[0004] 1. Avoid the solder paste residue at the bottom of the steel mesh from contaminating the PCB board, resulting in solder adhesion problems on the PCB after passing through the reflow oven;

[0005] 2. The solder paste may block the holes, and the solder paste may leak during printing, resulting in open circuit phenomena on the product after passing through the oven;

[0006] 3. The solder paste residue on the steel mesh wall affects the printing quality, resulting in phenomena such as less solder and sharp tips;

[0007] However, the current steel mesh wiping mechanism in the conventional printing machine still has the following deficiencies in the cleaning effect of the steel mesh:

[0008] 1. The current steel mesh wiping methods in the printing machine are dry wiping, wet wiping, and vacuum wiping. Each wiping can only use one of these wiping methods. It takes three actions to complete the cyclic wiping of the three wiping methods, which is very time-consuming for the production line;

[0009] 2. Even if all these three wiping methods are used, the wiping effect for complex products is still not ideal, especially for products with unreasonable steel mesh openings, which is even more challenging;

[0010] 3. For the steel mesh with locally thickened etching at the bottom, the cleaning effect is even more unsatisfactory, and there is often solder powder residue at the bottom of the steel mesh;

[0011] Therefore, a new wiping and cleaning steel mesh mechanism applied to a printing machine is proposed. Content of the Utility Model

[0012] In view of this, the present utility model provides a new wiping and cleaning steel mesh mechanism applied to a printing press to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0013] The technical solution of the embodiment of the present utility model is realized as follows: A new wiping and cleaning steel mesh mechanism applied to a printing press includes a cleaning component, and the cleaning component includes a mounting seat, a wiping paper supply roller, a recycling motor, a wiping paper recycling roller, and two mounting grooves.

[0014] Both the wiping paper supply roller and the wiping paper recycling roller are rotatably connected to the inside of the mounting seat. The recycling motor is installed on one side of the mounting seat. The two mounting grooves are symmetrically opened on the upper surface of the mounting seat. An alcohol spraying pipe, a vacuum box, a rubber strip, and a blowing pipe are arranged inside the mounting seat. Both ends of the alcohol spraying pipe, the vacuum box, the rubber strip, and the blowing pipe are fixedly connected with mounting plates. The lower surface of the mounting plate fits against the inner bottom wall of the mounting groove, and the opposite surfaces of the two corresponding mounting plates respectively fit against the inner side walls of the two mounting grooves. Four guiding rollers are symmetrically and fixedly connected to the inner side wall of the mounting seat.

[0015] Further preferably, spraying holes are evenly opened on the upper surface of the alcohol spraying pipe, and a vacuum suction nozzle is installed on the upper surface of the vacuum box.

[0016] Further preferably, the wiping paper supply roller, the alcohol spraying pipe, the vacuum box, the rubber strip, the blowing pipe, and the wiping paper recycling roller are arranged in sequence from back to front.

[0017] Further preferably, the output shaft of the recycling motor is fixedly connected to one end of the wiping paper recycling roller.

[0018] Further preferably, a limiting component is installed inside the mounting plate, and the limiting component includes a pull rod, a limiting plate, two limiting rods, a spring, and a limiting groove.

[0019] The limiting plate is slidably connected to the outer side walls of the two limiting rods. The spring is sleeved on the outer side walls of the limiting rods. The pull rod is fixedly connected to the upper surface of the limiting plate. The limiting groove is opened on one side of the mounting plate.

[0020] Further preferably, the limiting plate is slidably connected to the inner side wall of the limiting groove, and both ends of the spring respectively abut against the limiting plate and the mounting plate.

[0021] Further preferably, the limiting rods are fixedly connected to one side of the inner wall of the limiting groove.

[0022] Further preferably, a slot is opened on one side of the inner wall of the mounting groove, and the limiting plate is slidably connected to the inner side wall of the slot.

[0023] Due to the adoption of the above technical solutions in the embodiments of the present utility model, it has the following advantages: When wiping the stencil in the present utility model, the wiping paper supply roller supplies the wiping paper, and the stencil is wiped by the wiping paper. At the same time, high-pressure gas is blown out from the air blowing pipe, and the high-pressure gas blows upward to clean the stencil. The blowing can pre-treat the solder paste residues on the pore walls of the stencil, especially the solder paste residues in small mesh holes and the places at the bottom of the stencil that are not easy to wipe. The stencil is wiped by the rubber strip, and combined with the high-pressure gas blown out from the air blowing pipe, the wiping effect can be further improved. Spraying alcohol through the alcohol spraying pipe can perform wet wiping. During the reciprocating wiping process, the alcohol on the stencil can be quickly volatilized through the vacuum box and the air blowing pipe. At the same time, the impurities cleaned from the stencil are sucked into the vacuum box for cleaning. The present utility model integrates three wiping methods: dry wiping, wet wiping, and vacuum wiping, improving the cleaning effect of the stencil and avoiding the residue of tin powder at the bottom of the stencil.

[0024] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present utility model will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a structural diagram of the present utility model;

[0027] Figure 2 It is a structural diagram of the alcohol spraying pipe of the present utility model;

[0028] Figure 3 It is a structural diagram of the mounting plate of the present utility model;

[0029] Figure 4 It is a structural diagram of the limiting component of the present utility model;

[0030] Figure 5 It is a structural diagram of the mounting seat of the present utility model;

[0031] Figure 6 It is a schematic diagram of the installation position of the guide roller of the present utility model.

[0032] Reference numerals: 101, cleaning assembly; 11, mounting base; 12, wiping paper supply roller; 13, recycling motor; 14, wiping paper recycling roller; 15, mounting plate; 16, alcohol spraying pipe; 17, spraying holes; 18, vacuum box; 19, vacuum suction nozzle; 20, rubber strip; 22, air blowing pipe; 24, mounting groove; 25, guiding roller; 301, limiting assembly; 31, pull rod; 32, limiting plate; 33, limiting rod; 34, spring; 35, slot; 36, limiting groove. Detailed implementation manners

[0033] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are regarded as being exemplary in nature rather than restrictive.

[0034] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0035] As Figures 1 - 6 shown, an embodiment of the present invention provides a novel wiping and cleaning stencil mechanism applied to a printing press, including a cleaning assembly 101. The cleaning assembly 101 includes a mounting base 11, a wiping paper supply roller 12, a recycling motor 13, a wiping paper recycling roller 14, and two mounting grooves 24;

[0036] Both the wiping paper supply roller 12 and the wiping paper recycling roller 14 are rotatably connected to the inside of the mounting base 11. The recycling motor 13 is installed on one side of the mounting base 11. The two mounting grooves 24 are symmetrically formed on the upper surface of the mounting base 11. An alcohol spraying pipe 16, a vacuum box 18, a rubber strip 20, and an air blowing pipe 22 are arranged inside the mounting base 11. Both ends of the alcohol spraying pipe 16, the vacuum box 18, the rubber strip 20, and the air blowing pipe 22 are fixedly connected with mounting plates 15. The lower surface of the mounting plate 15 abuts against the inner bottom wall of the mounting groove 24. The opposite surfaces of the two corresponding mounting plates 15 respectively abut against the inner side walls of the two mounting grooves 24. Four guiding rollers 25 are symmetrically and fixedly connected to the inner side wall of the mounting base 11;

[0037] When the cleaning assembly 101 works, it moves. The wiping paper supply roller 12 supplies wiping paper. At the same time, high-pressure gas is blown out from the air blowing pipe 22. The high-pressure gas blows upward to clean the stencil. Blowing can pre-treat the solder paste residues on the pore walls of the stencil, especially the solder paste residues in small mesh holes and the places on the bottom of the stencil that are not easy to wipe, so as to facilitate the wiping and cleaning operation of the wiping paper;

[0038] The stencil is wiped by the rubber strip 20. Combining with the high-pressure gas blown out from the air blowing pipe 22 can further improve the wiping effect;

[0039] Spraying alcohol through the alcohol spraying pipe 16 enables wet wiping. During the reciprocating wiping process, the alcohol on the stencil can be quickly volatilized through the vacuum box 18 and the air blowing pipe 22. At the same time, the impurities cleaned from the stencil are sucked into the vacuum box 18 for cleaning.

[0040] In one embodiment, spraying holes 17 are evenly formed on the upper surface of the alcohol spraying pipe 16. Through the spraying holes 17, alcohol can be evenly sprayed onto the stencil. The alcohol spraying pipe 16 is connected to an external transfer pump through a pipeline.

[0041] A vacuum suction nozzle 19 is installed on the upper surface of the vacuum box 18. The vacuum suction nozzle 19 contacts the stencil, and thus impurities on the stencil can be sucked into the vacuum box 18 through the vacuum suction nozzle 19 to achieve vacuum wiping. The vacuum box 18 is connected to an external vacuum pump through a pipeline.

[0042] In one embodiment, the wiping paper supply roller 12, the alcohol spraying pipe 16, the vacuum box 18, the rubber strip 20, the air blowing pipe 22, and the wiping paper recovery roller 14 are arranged in sequence from the rear to the front. Thus, during the reciprocating wiping process, three wiping methods of dry wiping, wet wiping, and vacuum wiping can be achieved.

[0043] In one embodiment, the output shaft of the recovery motor 13 is fixedly connected to one end of the wiping paper recovery roller 14. By driving the wiping paper recovery roller 14 through the recovery motor 13 and with the cooperation of the guide roller 25, the wiping paper can be rotated to achieve the wiping action.

[0044] In one embodiment, a limiting component 301 is installed inside the mounting plate 15. The limiting component 301 includes a pull rod 31, a limiting plate 32, two limiting rods 33, a spring 34, and a limiting groove 36.

[0045] The limiting plate 32 is slidably connected to the outer sidewalls of the two limiting rods 33. The spring 34 is sleeved on the outer sidewalls of the limiting rods 33. The pull rod 31 is fixedly connected to the upper surface of the limiting plate 32. The limiting groove 36 is formed on one side of the mounting plate 15.

[0046] Through the limiting component 301, the alcohol spraying pipe 16, the vacuum box 18, the rubber strip 20, and the air blowing pipe 22 can be quickly disassembled.

[0047] In one embodiment, the limiting plate 32 is slidably connected to the inner sidewall of the limiting groove 36. Two ends of the spring 34 respectively abut against the limiting plate 32 and the mounting plate 15. The limiting rods 33 are fixedly connected to one side of the inner wall of the limiting groove 36. A slot 35 is formed on one side of the inner wall of the mounting groove 24. The limiting plate 32 is slidably connected to the inner sidewall of the slot 35. By pushing the limiting plate 32 with the spring 34, the limiting plate 32 is inserted into the slot 35 to limit the position of the mounting plate 15.

[0048] When the utility model works: the mounting seat 11 is installed on a printing press. When wiping the stencil, the cleaning assembly 101 moves. At this time, the wiping paper supply roller 12 supplies wiping paper, and the stencil is wiped with the wiping paper. At the same time, high-pressure gas is blown out from the air blowing pipe 22, and the high-pressure gas blows and cleans the stencil upward. The stencil is wiped by the rubber strip 20. Combining with the high-pressure gas blown out from the air blowing pipe 22 can further improve the wiping effect. Alcohol is sprayed through the alcohol spraying pipe 16 for wet wiping. During the reciprocating wiping process, the alcohol on the stencil can be quickly volatilized through the vacuum box 18 and the air blowing pipe 22. At the same time, the impurities cleaned from the stencil are sucked into the vacuum box 18;

[0049] By pulling the pull rod 31, the pull rod 31 drives the limit plate 32, and the limit plate 32 compresses the spring 34, so that the limit plate 32 can be disengaged from the slot 35, and then the alcohol spraying pipe 16, the vacuum box 18, the rubber strip 20 or the air blowing pipe 22 can be disassembled for cleaning or replacement.

[0050] The above is only the specific implementation manner of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model can easily think of various changes or substitutions, and these should all be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A new wiping and cleaning steel mesh mechanism applied to a printing press, including a cleaning component (101), characterized in that: The cleaning component (101) includes a mounting base (11), a wiping paper supply roller (12), a recycling motor (13), a wiping paper recycling roller (14), and two mounting grooves (24); The wiping paper supply roller (12) and the wiping paper recycling roller (14) are both rotatably connected to the inside of the mounting base (11). The recycling motor (13) is installed on one side of the mounting base (11). The two mounting grooves (24) are symmetrically opened on the upper surface of the mounting base (11). An alcohol spraying pipe (16), a vacuum box (18), a rubber strip (20), and a blowing pipe (22) are arranged inside the mounting base (11). Both ends of the alcohol spraying pipe (16), the vacuum box (18), the rubber strip (20), and the blowing pipe (22) are fixedly connected with mounting plates (15). The lower surface of the mounting plate (15) fits against the inner bottom wall of the mounting groove (24). The opposite surfaces of the two corresponding mounting plates (15) respectively fit against the inner side walls of the two mounting grooves (24). Four guiding rollers (25) are symmetrically and fixedly connected to the inner side wall of the mounting base (11).

2. The novel wiping and cleaning steel mesh mechanism applied to a printing press according to claim 1, characterized in that: Spraying holes (17) are evenly opened on the upper surface of the alcohol spraying pipe (16). A vacuum suction nozzle (19) is installed on the upper surface of the vacuum box (18).

3. The novel wiping and cleaning steel mesh mechanism applied to a printing press according to claim 2, characterized in that: The wiping paper supply roller (12), the alcohol spraying pipe (16), the vacuum box (18), the rubber strip (20), the blowing pipe (22), and the wiping paper recycling roller (14) are arranged in sequence from back to front.

4. A novel wiping and cleaning steel mesh mechanism applied to a printing press according to claim 3, characterized in that: The output shaft of the recycling motor (13) is fixedly connected to one end of the wiping paper recycling roller (14).

5. The novel wiping and cleaning steel mesh mechanism applied to a printing press according to claim 4, characterized in that: A limiting component (301) is installed inside the mounting plate (15). The limiting component (301) includes a pull rod (31), a limiting plate (32), two limiting rods (33), a spring (34), and a limiting groove (36); The limiting plate (32) is slidably connected to the outer side walls of the two limiting rods (33). The spring (34) is sleeved on the outer side walls of the limiting rods (33). The pull rod (31) is fixedly connected to the upper surface of the limiting plate (32). The limiting groove (36) is opened on one side of the mounting plate (15).

6. The novel wiping and cleaning steel mesh mechanism applied to a printing press according to claim 5, wherein: The limiting plate (32) is slidably connected to the inner side wall of the limiting groove (36). Both ends of the spring (34) respectively abut against the limiting plate (32) and the mounting plate (15).

7. The novel wiping and cleaning steel mesh mechanism applied to a printing press according to claim 6, characterized in that: The limiting rod (33) is fixedly connected to one side of the inner wall of the limiting groove (36).

8. The novel wiping and cleaning steel mesh mechanism applied to a printing press according to claim 7, wherein: A slot (35) is opened on one side of the inner wall of the mounting groove (24). The limiting plate (32) is slidably connected to the inner side wall of the slot (35).

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