阅读说明：本技术 一种高效全自动印刷机 (High-efficient full-automatic printing machine ) 是由 符永胜 胡稳 张先文 舒恒 于 2021-07-12 设计创作，主要内容包括：本发明公开了一种高效全自动印刷机,涉及锡膏印刷机技术领域,为解决现有技术中传统锡膏印刷机在输送PCB板时大多数采用激光定位的方式对PCB板进行定位,而电子产品容易出现故障,导致PCB板在输送的过程中无法定位,而在印刷时,PCB板不再印刷工位的中间位置,容易印刷失败的问题。所述定位夹持装置的两侧分别安装有第一带咬合齿U形夹腿和第二带咬合齿U形夹腿,且第一带咬合齿U形夹腿和第二带咬合齿U形夹腿均与定位夹持装置滑动连接,所述支撑台的上方分别安装有第二电机和第二减速器,且第二电机和第二减速器均与支撑台固定连接,所述定位夹持装置的内部设置有齿轮,所述齿轮与第二减速器通过连轴固定连接。(The invention discloses a high-efficiency full-automatic printing machine, relates to the technical field of solder paste printing machines, and aims to solve the problems that in the prior art, most of traditional solder paste printing machines adopt a laser positioning mode to position a PCB when conveying the PCB, electronic products are prone to failure, the PCB cannot be positioned in the conveying process, the PCB is not printed at the middle position of a printing station any more during printing, and printing failure is prone to occurring. The positioning and clamping device is characterized in that a first U-shaped clamping leg with meshing teeth and a second U-shaped clamping leg with meshing teeth are respectively arranged on two sides of the positioning and clamping device, the first U-shaped clamping leg with meshing teeth and the second U-shaped clamping leg with meshing teeth are both in sliding connection with the positioning and clamping device, a second motor and a second speed reducer are respectively arranged above the supporting table, the second motor and the second speed reducer are both fixedly connected with the supporting table, a gear is arranged inside the positioning and clamping device, and the gear is fixedly connected with the second speed reducer through a connecting shaft.)

1. An efficient full-automatic printing machine comprises a first working box (1) and a second working box (2), and is characterized in that: a supporting table (11) is arranged inside the first working box (1), the supporting table (11) is fixedly connected with the first working box (1), a positioning clamping device (12) is arranged above the supporting table (11), the positioning clamping device (12) is fixedly connected with the supporting table (11), a first U-shaped clamping leg (20) with meshing teeth and a second U-shaped clamping leg (21) with meshing teeth are respectively arranged on two sides of the positioning clamping device (12), the first U-shaped clamping leg (20) with meshing teeth and the second U-shaped clamping leg (21) with meshing teeth are both in sliding connection with the positioning clamping device (12), a second motor (13) and a second speed reducer (14) are respectively arranged above the supporting table (11), the second motor (13) and the second speed reducer (14) are both fixedly connected with the supporting table (11), a gear (22) is arranged inside the positioning clamping device (12), the gear (22) is fixedly connected with the second speed reducer (14) through a connecting shaft, and the first U-shaped clamping leg (20) with the meshing teeth and the second U-shaped clamping leg (21) with the meshing teeth are meshed with the gear (22).

2. A high efficiency, fully automatic printing press as claimed in claim 1, wherein: the lifting device (17) is arranged in the second working box (2), the first ball screw (25) and the second ball screw (31) are respectively arranged in the lifting device (17), the first ball screw (25) and the second ball screw (31) are fixedly connected with the lifting device (17) through bearings, a first ball screw pair (26) is arranged on the outer side of the first ball screw (25), the first ball screw pair (26) is in threaded connection with the first ball screw (25), a first connecting seat (27) is arranged on one side of the first ball screw pair (26), the first connecting seat (27) is fixedly connected with the first ball screw pair (26), a first ejection column (28) is arranged below the first connecting seat (27), the first ejection column (28) is fixedly connected with the first connecting seat (27), a second ball screw pair (32) is arranged on the outer side of the second ball screw (31), and the second ball screw pair (32) is in threaded connection with the second ball screw (31), a second connecting seat (33) is installed on one side of the second ball screw pair (32), the second connecting seat (33) is fixedly connected with the second ball screw pair (32), a second ejection column (34) is installed below the second connecting seat (33), and the second ejection column (34) is fixedly connected with the second connecting seat (33).

3. A high efficiency, fully automatic printing press as claimed in claim 2, wherein: first step motor (23) and second step motor (29) are installed respectively to the inside of elevating gear (17), and first step motor (23) and second step motor (29) all with elevating gear (17) fixed connection, first step motor reduction gear (24) are installed to the below of first step motor (23), first ball screw (25) and first step motor (23) all through shaft coupling and first step motor reduction gear (24) fixed connection, second step motor reduction gear (30) are installed to the below of second step motor (29), second ball screw (31) and second step motor (29) all are through shaft coupling and second step motor reduction gear (30) fixed connection.

4. A high efficiency, fully automatic printing press as claimed in claim 2, wherein: first connecting plate (41) is installed to the below of first fore-set (28), and first connecting plate (41) and first fore-set (28) fixed connection, first spring (43) are installed to the below of first connecting plate (41), first holder (44) are installed to the below of first spring (43), first connecting plate (41) and first holder (44) all with first spring (43) fixed connection, the inboard of first spring (43) is provided with first stable axle (42), first stable axle (42) and first connecting plate (41) sliding connection, first stable axle (42) and first holder (44) fixed connection, first scraper (45) are installed to the below of first holder (44), and first scraper (45) and first holder (44) interlock are connected.

5. A high efficiency, fully automatic printing press as claimed in claim 2, wherein: second connecting plate (46) are installed to the below of second fore-set (34), and second connecting plate (46) and second fore-set (34) fixed connection, second spring (48) are installed to the below of second connecting plate (46), second holder (49) are installed to the below of second spring (48), second holder (49) and second connecting plate (46) all with second spring (48) fixed connection, the inboard of second spring (48) is provided with second steady axle (47), second holder (49) and second steady axle (47) fixed connection, second steady axle (47) and second connecting plate (46) sliding connection, second scraper (50) are installed to the below of second holder (49), and second scraper (50) and second holder (49) interlock are connected.

6. A high efficiency, fully automatic printing press as claimed in claim 1, wherein: bearing platform (3) are installed to the top of first work box (1), and bearing platform (3) and first work box (1) fixed connection, drive roller (8) and driven voller (9) are installed respectively to the both sides of bearing platform (3), and drive roller (8) and driven voller (9) all rotate with bearing platform (3) through the bearing and are connected, the outside of drive roller (8) and driven voller (9) all is provided with conveyer belt (10), and drive roller (8) and driven voller (9) all laminate with conveyer belt (10).

7. An efficient fully automatic printing press as claimed in claim 6, wherein: the utility model discloses a driving device, including first workbin (1), the internally mounted of first workbin (1) has first motor (4) and first reduction gear (5), and first motor (4) and first reduction gear (5) all with first workbin (1) fixed connection, install drive wheel (6) on the preceding terminal surface of first reduction gear (5), and drive wheel (6) and first reduction gear (5) through linking a fixed connection, install on the preceding terminal surface of drive roller (8) from driving wheel (7), and from driving wheel (7) and drive roller (8) fixed connection, it is connected through the belt rotation with drive wheel (6) to follow driving wheel (7).

8. A high efficiency, fully automatic printing press as claimed in claim 1, wherein: the utility model discloses a pneumatic control cabinet, including second work case (2), the internally mounted of second work case (2) has cylinder (15), and cylinder (15) and second work case (2) fixed connection, the inside of second work case (2) is provided with sideslip case (16), second work case (2) and cylinder (15) pass through connecting seat fixed connection, install on the preceding terminal surface of second work case (2) fixed leg (18), and fixed leg (18) and second work case (2) fixed connection, steel mesh (19) are installed to the below of fixed leg (18), and steel mesh (19) and fixed leg (18) fixed connection.

9. A high efficiency, fully automatic printing press as claimed in claim 8, wherein: the novel horizontal moving box is characterized in that a third ball screw (39) is mounted inside the horizontal moving box (16), the third ball screw (39) is rotatably connected with the horizontal moving box (16), a third ball screw pair (40) is mounted on the outer side of the third ball screw (39), the third ball screw pair (40) is in threaded connection with the third ball screw (39), the third ball screw pair (40) is fixedly connected with the lifting device (17), a third stepping motor (35) is mounted inside the horizontal moving box (16), and the third stepping motor (35) is fixedly connected with the horizontal moving box (16).

10. A high efficiency, fully automatic printing press as claimed in claim 9, wherein: a third step motor reducer (36) is installed on one side of the third step motor (35), a driving gear (37) is installed on one side of the third step motor reducer (36), the driving gear (37) and the third step motor (35) are both fixedly connected with the third step motor reducer (36) through a coupler, a driven gear (38) is installed on the outer side of the third ball screw (39), the driven gear (38) is fixedly connected with the third ball screw (39), and the driven gear (38) is meshed with the driving gear (37).

Technical Field

The invention relates to the technical field of solder paste printing machines, in particular to a high-efficiency full-automatic printing machine.

Background

The surface mounting technology has changed greatly in recent years, the electronic product is towards miniaturization, light and high reliability, make the surface mounted electronic components continuously develop towards the thin and tiny high integration, this has produced the new challenge to the surface mounting technology of the circuit board, the first process of the surface mounting of circuit board is finished by the tin cream printer, this process is very important, the traditional tin cream printer adopts the laser positioning mode to position the PCB board while transporting PCB board mostly, and the electronic product breaks down easily, cause the PCB board to be unable to position in the course of transporting, and while printing, the PCB board no longer prints the intermediate position of the station, cause the printing to fail easily; therefore, the market urgently needs to develop an efficient full-automatic printing machine to help people solve the existing problems.

Disclosure of Invention

The invention aims to provide an efficient full-automatic printing machine, and aims to solve the problems that most of the traditional solder paste printing machines in the background technology adopt a laser positioning mode to position a PCB when the PCB is conveyed, electronic products are prone to failure, the PCB cannot be positioned in the conveying process, the PCB is not printed at the middle position of a printing station any more during printing, and printing failure is prone to occur.

In order to achieve the purpose, the invention provides the following technical scheme: a high-efficiency full-automatic printing machine comprises a first working box and a second working box, wherein a supporting table is arranged in the first working box, the supporting platform is fixedly connected with the first working box, a positioning and clamping device is arranged above the supporting platform, and the positioning and clamping device is fixedly connected with the supporting table, a first U-shaped clamping leg with an occlusion tooth and a second U-shaped clamping leg with an occlusion tooth are respectively arranged at two sides of the positioning and clamping device, the first U-shaped clamping leg with the meshing teeth and the second U-shaped clamping leg with the meshing teeth are both connected with the positioning and clamping device in a sliding way, a second motor and a second speed reducer are respectively arranged above the supporting platform, the second motor and the second reducer are both fixedly connected with the support table, a gear is arranged inside the positioning and clamping device, the gear is fixedly connected with the second speed reducer through a connecting shaft, and the first U-shaped clamping leg with the meshing teeth and the second U-shaped clamping leg with the meshing teeth are meshed with the gear.

Preferably, a lifting device is arranged inside the second working box, a first ball screw and a second ball screw are respectively arranged inside the lifting device, the first ball screw and the second ball screw are fixedly connected with the lifting device through bearings, a first ball screw pair is arranged on the outer side of the first ball screw and is in threaded connection with the first ball screw, a first connecting seat is arranged on one side of the first ball screw pair and is fixedly connected with the first ball screw pair, a first ejection column is arranged below the first connecting seat and is fixedly connected with the first connecting seat, a second ball screw pair is arranged on the outer side of the second ball screw and is in threaded connection with the second ball screw, a second connecting seat is arranged on one side of the second ball screw pair, and the second connecting seat is fixedly connected with the second ball screw pair, a second ejection column is arranged below the second connecting seat, and the second ejection column is fixedly connected with the second connecting seat.

Preferably, first step motor and second step motor are installed respectively to elevating gear's inside, and first step motor and second step motor all with elevating gear fixed connection, first step motor reduction gear is installed to the below of first step motor, first ball screw and first step motor all through shaft coupling and first step motor reduction gear fixed connection, second step motor reduction gear is installed to the below of second step motor, second ball screw and second step motor all through shaft coupling and second step motor reduction gear fixed connection.

Preferably, first connecting plate is installed to the below of first fore-set, and first connecting plate and first fore-set fixed connection, first spring is installed to the below of first connecting plate, first holder is installed to the below of first spring, first connecting plate and first holder all with first spring fixed connection, the inboard of first spring is provided with first stable axle, first stable axle and first connecting plate sliding connection, first stable axle and first holder fixed connection, first scraper is installed to the below of first holder, and first scraper is connected with first holder interlock.

Preferably, the second connecting plate is installed to the below of second fore-set, and second connecting plate and second fore-set fixed connection, the second spring is installed to the below of second connecting plate, the second holder is installed to the below of second spring, second holder and second connecting plate all with second spring fixed connection, the inboard of second spring is provided with the second and stabilizes the axle, second holder and second stabilize axle fixed connection, second stabilizes axle and second connecting plate sliding connection, the second scraper is installed to the below of second holder, and the second scraper is connected with the interlock of second holder.

Preferably, the bearing platform is installed to the top of first work box, and bearing platform and first work box fixed connection, drive roller and driven voller are installed respectively to the both sides of bearing platform, and drive roller and driven voller all rotate with the bearing platform through the bearing and be connected, the outside of drive roller and driven voller all is provided with the conveyer belt, and drive roller and driven voller all laminate with the conveyer belt.

Preferably, the internally mounted of first workbin has first motor and first reduction gear, and first motor and first reduction gear all with first workbin fixed connection, install the drive wheel on the preceding terminal surface of first reduction gear, and the drive wheel passes through even axle fixed connection with first reduction gear, install on the preceding terminal surface of drive roller from the driving wheel, and follow driving wheel and drive roller fixed connection, pass through the belt rotation with the drive wheel from the driving wheel and be connected.

Preferably, the internally mounted of second work box has the cylinder, and cylinder and second work box fixed connection, the inside of second work box is provided with the sideslip case, the second work box passes through connecting seat fixed connection with the cylinder, install fixed leg on the preceding terminal surface of second work box, and fixed leg and second work box fixed connection, the steel mesh is installed to the below of fixed leg, and steel mesh and fixed leg fixed connection.

Preferably, a third ball screw is mounted inside the traverse box and is rotatably connected with the traverse box, a third ball screw pair is mounted on the outer side of the third ball screw and is in threaded connection with the third ball screw, the third ball screw pair is fixedly connected with the lifting device, a third stepping motor is mounted inside the traverse box and is fixedly connected with the traverse box.

Preferably, a third step motor reducer is installed on one side of the third step motor, a driving gear is installed on one side of the third step motor reducer, the driving gear and the third step motor are both fixedly connected with the third step motor reducer through a coupler, a driven gear is installed on the outer side of the third ball screw and fixedly connected with the third ball screw, and the driven gear is connected with the driving gear in an occluded manner.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention is characterized in that through the arrangement of the positioning and clamping device, a first U-shaped clamping leg with meshing teeth and a second U-shaped clamping leg with meshing teeth are respectively arranged at two sides of the positioning and clamping device, the first U-shaped clamping leg with meshing teeth and the second U-shaped clamping leg with meshing teeth are both connected with the positioning and clamping device in a sliding way, a gear is also arranged in the positioning and clamping device, the first U-shaped clamping leg with meshing teeth and the second U-shaped clamping leg with meshing teeth can be driven to move through the rotation of the gear, the lengths of the first U-shaped clamping leg with meshing teeth and the second U-shaped clamping leg with meshing teeth are the same, the meshing tooth ratios of the first U-shaped clamping leg with meshing teeth and the second U-shaped clamping leg with meshing teeth are also the same, so that when the gear rotates, the moving distances of the first U-shaped clamping leg with meshing teeth and the second U-shaped clamping leg with meshing teeth are also the same, and the moving directions of the first U-shaped clamping leg with meshing teeth and the second U-shaped clamping leg with meshing teeth are opposite, through the first U-shaped clamping leg with the occlusion teeth and the second U-shaped clamping leg with the occlusion teeth, the PCB is clamped, the PCB is guaranteed to be located in the middle of a printing station when printing is conducted, printing quality is guaranteed, a transmission electronic positioning mode is replaced by the pure mechanical mode, positioning stability is improved, and therefore the situation that the PCB deviates is avoided, and printing quality is improved.

2. According to the invention, through the arrangement of the first ball screw, the first ball screw pair, the second ball screw and the second ball screw pair, the first ball screw can be driven to rotate by the first stepping motor, the first ball screw pair can be driven to perform lifting motion by the rotation of the first ball screw, the first ball screw pair is connected with the first scraper by the first connecting seat, the first ejection column and the first clamper, so that the first scraper can perform lifting motion along with the first ball screw pair, and similarly, the second ball screw is driven to rotate by the second stepping motor, so that the second ball screw pair can be driven to drive the second scraper to perform lifting motion, the traditional lifting structure is replaced by a pure mechanical lifting structure, and the distance between the ball screw and the ball screw pair has a function of adjusting the distance with high precision, so that the pressure of the scraper can be accurately controlled, the scraper can automatically adapt to the surface of a steel mesh, solder paste can be uniformly printed on a PCB, the problem that the pressure of the scraper cannot be accurately controlled is solved, and the printing effect is improved.

3. According to the invention, through the arrangement of the first spring and the second spring, the first spring is arranged between the first clamp holder and the first ejection column, and the second spring is arranged between the second clamp holder and the second ejection column, so that excessive pressure can be buffered to prevent the scraper and the steel mesh from being damaged, and the printing quality of the solder paste is greatly improved.

Drawings

FIG. 1 is a schematic diagram of the internal structure of a high-efficiency fully automatic printing machine according to the present invention;

FIG. 2 is a general view of the positioning and clamping device of the present invention;

FIG. 3 is a schematic view of the internal structure of the positioning and clamping device of the present invention;

FIG. 4 is a schematic view of the internal structure of the lifting device of the present invention;

FIG. 5 is a schematic view of the internal structure of the traverse box of the present invention;

fig. 6 is an enlarged schematic view at a in the drawing of the present invention.

In the figure: 1. a first work box; 2. a second work box; 3. a support platform; 4. a first motor; 5. a first decelerator; 6. a drive wheel; 7. a driven wheel; 8. a drive roller; 9. a driven roller; 10. a conveyor belt; 11. a support table; 12. positioning the clamping device; 13. a second motor; 14. a second decelerator; 15. a cylinder; 16. traversing the box; 17. a lifting device; 18. a fixed leg; 19. a steel mesh; 20. a first U-shaped clamping leg with meshing teeth; 21. the second U-shaped clamping leg with the meshing teeth; 22. a gear; 23. a first stepper motor; 24. a first stepper motor reducer; 25. a first ball screw; 26. a first ball screw pair; 27. a first connecting seat; 28. a first top pillar; 29. a second stepping motor; 30. a second step motor reducer; 31. a second ball screw; 32. a second ball screw pair; 33. a second connecting seat; 34. a second top pillar; 35. a third step motor; 36. a third step of stepping the motor reducer; 37. A drive gear; 38. a driven gear; 39. a third ball screw; 40. a third ball screw pair; 41. A first connecting plate; 42. a first stabilizing shaft; 43. a first spring; 44. a first gripper; 45. a first scraper; 46. a second connecting plate; 47. a second stabilizing shaft; 48. a second spring; 49. a second gripper; 50. a second scraper.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-6, an embodiment of the present invention is shown: a high-efficiency full-automatic printing machine comprises a first work box 1 and a second work box 2, wherein a lifting device 17 is arranged inside the second work box 2, a first ball screw 25 and a second ball screw 31 are respectively arranged inside the lifting device 17, the first ball screw 25 and the second ball screw 31 are fixedly connected with the lifting device 17 through a bearing, a first ball screw pair 26 is arranged outside the first ball screw 25, the first ball screw pair 26 is in threaded connection with the first ball screw 25, a first connecting seat 27 is arranged on one side of the first ball screw pair 26, the first connecting seat 27 is fixedly connected with the first ball screw pair 26, a first ejection column 28 is arranged below the first connecting seat 27, the first ejection column 28 is fixedly connected with the first connecting seat 27, a second ball screw pair 32 is arranged outside the second ball screw 31, the second ball screw pair 32 is in threaded connection with the second ball screw 31, a second connecting seat 33 is installed on one side of the second ball screw pair 32, the second connecting seat 33 is fixedly connected with the second ball screw pair 32, a second top pillar 34 is installed below the second connecting seat 33, the second top pillar 34 is fixedly connected with the second connecting seat 33, a first stepping motor 23 and a second stepping motor 29 are respectively installed inside the lifting device 17, the first stepping motor 23 and the second stepping motor 29 are both fixedly connected with the lifting device 17, a first stepping motor reducer 24 is installed below the first stepping motor 23, the first ball screw 25 and the first stepping motor 23 are both fixedly connected with the first stepping motor reducer 24 through a coupler, a second stepping motor reducer 30 is installed below the second stepping motor 29, and the second ball screw 31 and the second stepping motor 29 are both fixedly connected with the second stepping motor reducer 30 through a coupler, the device can accurately control the pressure of the scraper by driving the suspension type scraper to lift through two stepping motors, a support table 11 is arranged inside a first working box 1, the support table 11 is fixedly connected with the first working box 1, a positioning clamping device 12 is arranged above the support table 11, the positioning clamping device 12 is fixedly connected with the support table 11, a first U-shaped clamping leg with meshing teeth 20 and a second U-shaped clamping leg with meshing teeth 21 are respectively arranged at two sides of the positioning clamping device 12, the first U-shaped clamping leg with meshing teeth 20 and the second U-shaped clamping leg with meshing teeth 21 are both in sliding connection with the positioning clamping device 12, a second motor 13 and a second speed reducer 14 are respectively arranged above the support table 11, the second motor 13 and the second speed reducer 14 are both fixedly connected with the support table 11, a gear 22 is arranged inside the positioning clamping device 12, and the gear 22 is fixedly connected with the second speed reducer 14 through a connecting shaft, the first U-shaped clamping leg with the meshing teeth 20 and the second U-shaped clamping leg with the meshing teeth 21 are meshed with the gear 22, a first connecting plate 41 is arranged below the first ejection column 28, the first connecting plate 41 is fixedly connected with the first ejection column 28, a first spring 43 is arranged below the first connecting plate 41, a first clamp 44 is arranged below the first spring 43, the first connecting plate 41 and the first clamp 44 are fixedly connected with the first spring 43, a first stabilizing shaft 42 is arranged on the inner side of the first spring 43, the first stabilizing shaft 42 is in sliding connection with the first connecting plate 41, the first stabilizing shaft 42 is fixedly connected with the first clamp 44, a first scraper 45 is arranged below the first clamp 44, the first scraper 45 is meshed with the first clamp 44, the first stabilizing shaft 42 and the first spring 43 are provided with four parts, a second connecting plate 46 is arranged below the second ejection column 34, and the second connecting plate 46 is fixedly connected with the second ejection column 34, a second spring 48 is arranged below the second connecting plate 46, a second clamper 49 is arranged below the second spring 48, the second clamper 49 and the second connecting plate 46 are fixedly connected with the second spring 48, a second stabilizing shaft 47 is arranged on the inner side of the second spring 48, the second clamper 49 is fixedly connected with the second stabilizing shaft 47, the second stabilizing shaft 47 is slidably connected with the second connecting plate 46, a second scraper 50 is arranged below the second clamper 49, the second scraper 50 is engaged with the second clamper 49, four second springs 48 and four second stabilizing shafts 47 are arranged, a supporting platform 3 is arranged above the first working box 1, the supporting platform 3 is fixedly connected with the first working box 1, a driving roller 8 and a driven roller 9 are respectively arranged on two sides of the supporting platform 3, the driving roller 8 and the driven roller 9 are rotatably connected with the supporting platform 3 through bearings, a conveyer belt 10 is arranged on the outer sides of the driving roller 8 and the driven roller 9, the driving roller 8 and the driven roller 9 are both attached to the conveying belt 10, a first motor 4 and a first speed reducer 5 are mounted inside the first working box 1, the first motor 4 and the first speed reducer 5 are both fixedly connected with the first working box 1, a driving wheel 6 is mounted on the front end face of the first speed reducer 5, the driving wheel 6 is fixedly connected with the first speed reducer 5 through a connecting shaft, a driven wheel 7 is mounted on the front end face of the driving roller 8, the driven wheel 7 is fixedly connected with the driving roller 8, the driven wheel 7 is rotatably connected with the driving wheel 6 through a belt, an air cylinder 15 is mounted inside the second working box 2, the air cylinder 15 is fixedly connected with the second working box 2, a transverse moving box 16 is arranged inside the second working box 2, the second working box 2 is fixedly connected with the air cylinder 15 through a connecting seat, a fixing leg 18 is mounted on the front end face of the second working box 2, and the fixing leg 18 is fixedly connected with the second working box 2, a steel mesh 19 is arranged below the fixed leg 18, the steel mesh 19 is fixedly connected with the fixed leg 18, a third ball screw 39 is arranged inside the traverse box 16, the third ball screw 39 is rotatably connected with the traverse box 16, a third ball screw pair 40 is arranged outside the third ball screw 39, the third ball screw pair 40 is in threaded connection with the third ball screw 39, the third ball screw pair 40 is fixedly connected with the lifting device 17, a third stepping motor 35 is arranged inside the traverse box 16, the third stepping motor 35 is fixedly connected with the traverse box 16, a third stepping motor reducer 36 is arranged on one side of the third stepping motor 35, a driving gear 37 is arranged on one side of the third stepping motor reducer 36, the driving gear 37 and the third stepping motor 35 are both fixedly connected with the third stepping motor reducer 36 through a coupler, a driven gear 38 is arranged outside the third ball screw 39, the driven gear 38 is fixedly connected with the third ball screw 39, the driven gear 38 is engaged with the driving gear 37, the lifting device 17 is arranged on the front end surface of the traverse box 16 and is connected with the traverse box 16 in a sliding way, and the lifting device 17 is fixedly connected with the third ball screw pair 40.

The working principle is as follows: when in use, a PCB is placed above the conveyer belt 10, two conveyer belts 10 are arranged, two groups of driving structures for driving the conveyer belt 10 to rotate are arranged, the first motor 4 is started, the first motor 4 drives the driving wheel 6 to rotate after being decelerated by the first decelerator 5, the driving wheel 6 drives the driven wheel 7 to rotate through the belt, the driven wheel 7 drives the driving roller 8 to rotate, the driving roller 8 drives the conveyer belt 10 to rotate, the conveyer belt 10 can convey the PCB to the position right below the steel mesh 19, the second motor 13 is started, the second motor 13 drives the gear 22 to rotate after being decelerated by the second decelerator 14, the first U-shaped clamping leg with the meshing teeth 20 and the second U-shaped clamping leg with the meshing teeth 21 rotate reversely at the same time through the rotation of the gear 22, so that the PCB on the supporting platform 3 is clamped and is positioned at the middle position, the air cylinder 15 is started, the air cylinder 15 enables the transverse box 16 to move downwards, the traverse box 16 moves the steel mesh 19 downwards through the fixing legs 18, so that the steel mesh 19 is attached to the PCB, the lower portion of the PCB is supported by the supporting platform 3, the first stepping motor 23 or the second stepping motor 29 is started, the first stepping motor 23 can be decelerated by the first stepping motor reducer 24 to drive the first ball screw 25 to rotate, so that the first ball screw pair 26 moves downwards, the first ball screw pair 26 can drive the first scraper 45 to be attached to the steel mesh 19 through the first connecting seat 27, the first top pillar 28, the first connecting plate 41 and the first clamper 44, the second stepping motor 29 can be decelerated by the second stepping motor reducer 30 to drive the second ball screw 31 to rotate, so that the second ball screw pair 32 moves downwards, the second ball screw pair 32 can drive the second scraper 50 to be attached to the steel mesh 19 through the second connecting seat 33, the second top pillar 34, the second connecting plate 46, the second spring 48 and the second clamper 49, so that the first scraper 45 or the second scraper 50 is attached to the steel mesh 19, when the first scraper 45 is attached to the steel mesh 19, the lifting device 17 moves rightwards, when the second scraper 50 is attached to the steel mesh 19, the lifting device 17 moves leftwards, the third step motor 35 is started, the third step motor 35 is decelerated by the third step motor reducer 36 to drive the driving gear 37 to rotate, the driving gear 37 drives the third ball screw 39 to rotate through the driven gear 38, the third ball screw pair 40 moves transversely due to the rotation of the third ball screw 39, and the third ball screw pair 40 is fixedly connected with the lifting device 17, so that the working effect of the lifting device 17 moving transversely leftwards or rightwards is achieved, and the solder paste is printed on the surface of the PCB board through the scraping actions of the first scraper 45 and the second scraper 50 and the steel mesh 19.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.