PCB solder paste printing machine

Abstract

The utility model discloses a printed circuit board (PCB) solder paste printing machine which comprises a machine frame. The steel mesh assembly comprises a frame, a first steel mesh, a first driving part and a second steel mesh, a first annular groove and a second annular groove which are arranged in parallel are formed in the inner wall of the frame, the edge of the first steel mesh extends into the first annular groove, a first guide rod is further arranged on the first steel mesh, and a piston rod of the first driving part is connected with the first guide rod; the edge of the second steel mesh extends into the second steel mesh; the tin scraping assembly is correspondingly arranged above the steel mesh assembly; and the PCB clamp assembly comprises a jacking driving piece and a jacking platform, and the circuit board to be subjected to tin brushing is placed on the jacking platform. Compared with the prior art, the solder paste printing machine solves the problem that the efficiency is low when an existing solder paste printing machine prints more than one circuit board.

Description

Technical Field

[0001] The utility model relates to the technical field of solder paste printing, in particular to a PCB solder paste printer. Background Art

[0002] In the SMT production process, solder paste printing is first required. That is, solder paste is printed on a PCB circuit board through a specific template (i.e., a steel mesh). For example, Chinese patent CN1 08189540A discloses a solder paste printer, including a printer body, a clamping mechanism, and a protective mechanism. The lower end of the printer body is equipped with a protective mechanism, and the upper end surface of the protective mechanism is fixed with a clamping mechanism. The clamping mechanism is arranged on the lower side of the printer body. The clamping mechanism includes a turntable, a threaded rod, a bearing seat, an L-shaped pressure rod, a spring 1, a clamping block, a hollow pipe, a suction cup 1, an L-shaped support frame, a suction cup 2, a latch rod, a rack rod, a circular gear, and a support plate. The protective mechanism includes a magnetic bar block, an L-shaped steering block, an elastic protective cloth, a base plate, a moving wheel, a spring 2, a bottom plate, a spring 3, a screw rod, a sliding block, a telescopic hose, and a connecting plate.

[0003] In the existing solder paste printing device, usually only one steel mesh is provided, and accordingly, the solder paste can only be printed on one circuit board. When printing another circuit board, the solder paste printing device needs to be stopped, and the steel mesh needs to be disassembled and replaced before solder paste printing, which is inconvenient to operate. Utility Model Content

[0004] The utility model aims to provide a PCB solder paste printer to solve the problem of low efficiency of the existing solder paste printer when printing more than one circuit board.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solution: a PCB solder paste printer, comprising:

[0006] frame;

[0007] A steel mesh assembly, comprising a frame, a first steel mesh, a first driving member and a second steel mesh, wherein the inner wall of the frame is provided with a first annular groove and a second annular groove arranged in parallel, the edge of the first steel mesh extends into the first annular groove, the first steel mesh is further provided with a first guide rod, an opposite side of the upper surface of the frame is provided with a first waist-shaped hole arranged symmetrically, the first guide rod is penetrated through the first waist-shaped hole, the first driving member is fixedly mounted on the frame, the piston rod of the first driving member is connected to the first guide rod, and the edge of the second steel mesh extends into the second steel mesh;

[0008] The tin scraping assembly is arranged above the steel mesh assembly;

[0009] The PCB fixture assembly includes a lifting drive and a lifting platform, and the circuit board to be tinned is placed on the lifting platform.

[0010] As a further description of the above technical solution:

[0011] Symmetrically arranged guide rails are provided on both sides of the lifting platform, and the circuit board to be tinned is placed on the guide rails. An adsorption piece is also provided on the lifting platform. The adsorption piece is connected to the negative pressure generating device through an air pipe. Adsorption holes are provided on the surface of the adsorption piece, and the adsorption piece contacts the lower surface of the circuit board to be tinned.

[0012] As a further description of the above technical solution:

[0013] The tin scraping assembly includes a slide rail, a support beam, a mounting plate, a first electric cylinder and a first scraper. The support beam is slidably connected to the slide rail, the mounting plate is fixedly mounted on the support beam, the first electric cylinder is fixedly mounted on the mounting plate, and the first scraper is fixedly mounted on the piston rod of the first electric cylinder.

[0014] As a further description of the above technical solution:

[0015] Symmetrically arranged first electric cylinders are arranged on both sides of the mounting plate.

[0016] As a further description of the above technical solution:

[0017] A protective cover is arranged on the frame, and the protective cover comprises a cover body and a cover plate, the cover plate is hinged on the cover body, and a handle is arranged on the cover plate.

[0018] As a further description of the above technical solution:

[0019] The cover is a transparent acrylic plate.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0021] 1. In the utility model, the steel mesh assembly is arranged above the PCB fixture assembly, and the first steel mesh and the second steel mesh in the frame slide along the first ring groove and the second ring groove respectively, and the positions of the first steel mesh and the second steel mesh are adjusted so that the first steel mesh and the second steel mesh are switched and arranged correspondingly above the circuit board to be tinned, so as to facilitate tinning of different circuit boards.

[0022] 2. In the utility model, during the solder paste printing process, the lifting drive of the PCB fixture assembly drives the lifting platform to lift upward, and the circuit board to be tinned on the lifting platform contacts the first steel mesh or the second steel mesh, and then the tin scraping assembly scrapes the tin material. After the scraping is completed, the lifting platform drives the circuit board to be tinned downward to separate from the steel mesh, and the tinning is completed.

[0023] 3. In the utility model, two first scrapers arranged symmetrically are provided in the tin scraping assembly. Different scrapers are used for scraping during the reciprocating motion to improve the uniformity of scraping. During the reciprocating scraping, one first scraper is driven by the first electric cylinder to extend downward to achieve scraping; at the same time, the other first scraper is in an upward retracted state and does not contact the tin material. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a PCB solder paste printer Figure 1 .

[0026] Figure 2 A schematic diagram of the structure of a PCB solder paste printer Figure 2 .

[0027] Figure 3 The figure is a schematic diagram of the structure of a steel mesh assembly in a PCB solder paste printer.

[0028] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0029] Figure 5 The present invention is a structural schematic diagram of a tin scraping component in a PCB solder paste printer.

[0030] Figure 6 The figure is a schematic diagram of the structure of a PCB fixture assembly in a PCB solder paste printer.

[0031] Legend:

[0032] 1. Frame; 11. Cover; 12. Cover; 121. Handle; 2. Steel mesh assembly; 21. Frame; 211. First ring groove; 212. First waist-shaped hole; 22. First steel mesh; 221. First guide rod; 23. First driving member; 3. Tin scraping assembly; 31. Slide rail; 32. Support beam; 33. Mounting plate; 34. First electric cylinder; 35. First scraper; 4. PCB fixture assembly; 41. Lifting driving member; 42. Lifting platform; 421. Guide rail; 422. Adsorption member. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Example 1

[0035] See also Figure 1-6 The utility model provides a technical solution: a PCB solder paste printer, comprising:

[0036] Rack 1;

[0037] The steel mesh assembly 2 comprises a frame 21, a first steel mesh 22, a first driving member 23 and a second steel mesh. The inner wall of the frame 21 is provided with a first annular groove 211 and a second annular groove arranged in parallel. The edge of the first steel mesh 22 extends into the first annular groove 211. The first steel mesh 22 is further provided with a first guide rod 221. A first waist-shaped hole 212 arranged symmetrically is provided on an opposite side of the upper surface of the frame 21. The first guide rod 221 penetrates the first waist-shaped hole 212. The first driving member 23 is fixedly mounted on the frame 21. The piston rod of the first driving member 23 is connected to the first guide rod 221. The edge of the second steel mesh extends into the second steel mesh.

[0038] The tin scraping component 3 is arranged above the steel mesh component 2;

[0039] The PCB fixture assembly 4 comprises a lifting driving member 41 and a lifting platform 42 , and the circuit board 9 to be tinned is placed on the lifting platform 42 .

[0040] The installation structure of the second steel mesh is the same as that of the first steel mesh 22. Taking the movement of the first steel mesh 22 as an example, the first steel mesh 22 is contracted by the piston rod of the first driving member 23, so that the first guide rod 221 on the first steel mesh 22 slides along the first waist-shaped hole 212, and the first steel mesh 22 then moves along the first ring groove 211 to the top of the circuit board 9 to be tinned, and the second steel mesh originally located above the circuit board 9 to be tinned slides out of position.

[0041] The lifting platform 42 is provided with symmetrically arranged guide rails 421 on both sides, and the circuit board 9 to be tinned is placed on the guide rails 421. The lifting platform 42 is also provided with an adsorption member 422, which is connected to the negative pressure generating device through an air pipe, and the surface of the adsorption member 422 is provided with adsorption holes, and the adsorption member 422 contacts the lower surface of the circuit board 9 to be tinned. The negative pressure generating device generates negative pressure in the adsorption member 422, so that it adsorbs the circuit board 9 to be tinned through the adsorption holes, and prevents the circuit board 9 to be tinned from being offset.

[0042] The tin scraping assembly 3 includes a slide rail 31, a support beam 32, a mounting plate 33, a first electric cylinder 34 and a first scraper 35. The support beam 32 is slidably connected to the slide rail 31, the mounting plate 33 is fixedly mounted on the support beam 32, the first electric cylinder 34 is fixedly mounted on the mounting plate 33, and the first scraper 35 is fixedly mounted on the piston rod of the first electric cylinder 34. The tin scraping assembly 3 evenly scrapes the tin material on the steel mesh through the first scraper 35. During the scraping process, the support beam 32 reciprocates along the slide rail 31, so that the first scraper 35 reciprocates with the mounting plate 33 to achieve scraping. The first electric cylinder 34 can accurately control the downward distance of the first scraper 35 to improve the scraping quality.

[0043] Symmetrically arranged first electric cylinders 34 are provided on both sides of the mounting plate 33. Accordingly, two symmetrically arranged first scrapers 35 are provided in the tin scraping assembly 3. Different scrapers are used to scrape the tin in the reciprocating motion process to improve the uniformity of scraping. During the reciprocating scraping process, one first scraper 35 is driven by the first electric cylinder 34 to extend downward to achieve scraping; at the same time, the other first scraper 35 is in an upward retracted state and does not contact the tin material.

[0044] A protective cover is provided on the frame 1, and the protective cover includes a cover body 11 and a cover plate 12, the cover plate 12 is hinged on the cover body 11, and a handle 121 is provided on the cover plate 12. The cover plate 12 can be rotated and opened by the handle 121 thereon. During the tinning process, the protective cover isolates the tinning mechanism from the external environment, avoids tin material contamination, and improves the quality of tin material scraping.

[0045] The cover plate 12 is a transparent acrylic plate, which is convenient for observing the tinning process inside the protective cover to ensure the normal operation of the device.

[0046] Working principle: The steel mesh assembly 2 is arranged above the PCB fixture assembly 4, and the first steel mesh 22 and the second steel mesh in the frame 21 slide along the first ring groove 211 and the second ring groove respectively, and the positions of the first steel mesh 22 and the second steel mesh are adjusted so that the first steel mesh 22 and the second steel mesh are switched and arranged correspondingly above the circuit board 9 to be tinned, so as to facilitate tinning of different circuit boards. Due to the different heights of the first steel mesh 22 and the second steel mesh, when tinning different steel meshes, the lifting driving member 41 of the PCB fixture assembly 4 drives the lifting platform 42 to different lifting heights, so that the height of the circuit board 9 to be tinned thereon can adapt to the first steel mesh 22 or the second steel mesh. During the solder paste printing process, the lifting driving member 41 of the PCB fixture assembly 4 drives the lifting platform 42 to lift upward, and the circuit board 9 to be tinned on the lifting platform 42 contacts the first steel mesh 22 or the second steel mesh, and then the tin scraping assembly 3 scrapes the tin material. After the scraping is completed, the lifting platform 42 drives the circuit board 9 to be tinned downward to separate from the steel mesh, and the tinning is completed.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A PCB solder paste printer, characterized in that: include: frame; A steel mesh assembly, comprising a frame, a first steel mesh, a first driving member and a second steel mesh, wherein the inner wall of the frame is provided with a first annular groove and a second annular groove arranged in parallel, the edge of the first steel mesh extends into the first annular groove, the first steel mesh is further provided with a first guide rod, an opposite side of the upper surface of the frame is provided with a first waist-shaped hole arranged symmetrically, the first guide rod is penetrated through the first waist-shaped hole, the first driving member is fixedly mounted on the frame, the piston rod of the first driving member is connected to the first guide rod, and the edge of the second steel mesh extends into the second steel mesh; A tin scraping assembly, which is arranged above the steel mesh assembly; The PCB fixture assembly comprises a lifting drive and a lifting platform, and the circuit board to be tinned is placed on the lifting platform.

2. A PCB solder paste printer according to claim 1, characterized in that: Symmetrically arranged guide rails are provided on both sides of the lifting platform, and the circuit board to be tinned is placed on the guide rails. An adsorption component is also provided on the lifting platform, and the adsorption component is connected to a negative pressure generating device through an air pipe. Adsorption holes are provided on the surface of the adsorption component, and the adsorption component contacts the lower surface of the circuit board to be tinned.

3. A PCB solder paste printer according to claim 1, characterized in that: The tin scraper assembly includes a slide rail, a support beam, a mounting plate, a first electric cylinder and a first scraper. The support beam is slidably connected to the slide rail, the mounting plate is fixedly mounted on the support beam, the first electric cylinder is fixedly mounted on the mounting plate, and the first scraper is fixedly mounted on the piston rod of the first electric cylinder.

4. A PCB solder paste printer according to claim 3, characterized in that: The first electric cylinders are symmetrically arranged on both sides of the mounting plate.

5. A PCB solder paste printer according to claim 1, characterized in that: The frame is provided with a protective cover, which comprises a cover body and a cover plate, the cover plate is hinged on the cover body, and a handle is provided on the cover plate.

6. A PCB solder paste printer according to claim 5, characterized in that: The cover plate is a transparent acrylic plate.

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