CN211390535U

CN211390535U - Solder paste printing machine for circuit board

Info

Publication number: CN211390535U
Application number: CN201921984131.2U
Authority: CN
Inventors: 莫金伟; 徐良; 莫仕锋
Original assignee: Changzhou Yiertong Electronics Co ltd
Current assignee: Changzhou Yiertong Electronics Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-09-01
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a tin cream printing machine for circuit board belongs to circuit board soldering tin processingequipment technical field, and its technical scheme main points are, including the mount, the screen cloth board on tin subassembly and the fixed in mount of scraping on the mount of sliding connection, scrape tin subassembly and screen cloth board sliding connection, be equipped with the backup pad on the mount, the backup pad is located the screen cloth board and keeps away from the one side of scraping the tin subassembly, scrape the tin subassembly and include the support frame of sliding connection on the mount, be fixed in tin cream shower nozzle and sliding connection in the first scraper blade and the second scraper blade of tin cream shower nozzle both sides on the support frame, the tin cream shower nozzle sets up to the cavity type, be provided with down the subassembly between first scraper blade and the second. The first scraper blade or the second scraper blade can carry out reciprocating blade coating on the screen plate stably, and solder paste is uniformly infiltrated into the circuit board. The utility model is suitable for a design of tin cream printing machine.

Description

Solder paste printing machine for circuit board

Technical Field

The utility model belongs to the technical field of circuit board soldering tin processingequipment technique and specifically relates to a solder paste printing machine for circuit board is related to.

Background

The motor controller is an electric device for comprehensively controlling the motion process of the motor, and can flexibly control the working state of the motor. The motor controller circuit board comprises an insulated gate bipolar transistor control circuit module, a driving module and a protection circuit module, and the motor work is controlled through each module in the motor controller circuit board.

The manufacturing process of PCB board is promptly in the production process to the machine controller circuit board, the tin cream printing of the first process of production is exactly that tin cream printing machine accomplishes, current tin cream printing machine includes the mount table usually, fixed connection is the mount on the mount table, sliding connection scrapes the tin subassembly in the tin cream on the mount table, screen cloth and fixed connection are used for supporting circuit board's backup pad on the mount frame, the staff at first scribbles the tin cream on the screen cloth, scrape the tin cream above the screen cloth through the tin cream and make a round trip to scrape, on the circuit board above the backup pad with the tin cream infiltration above the screen cloth, thereby accomplish and apply paint work with a brush.

The above prior art solutions have the following drawbacks: in the prior art, solder paste is manually coated on a screen, and then the screen is coated in a reciprocating manner by a scraper, so that the manual force is difficult to be constant, uneven welding spots on a circuit board are easily caused, and the printing quality of the circuit board is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a solder paste printing machine for circuit board has uses manpower sparingly, the even effect of solder joint printing.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a solder paste printing machine for circuit board, includes mount, sliding connection in scrape the tin subassembly and be fixed in above the mount sieve otter board on the mount, scrape the tin subassembly with sieve otter board sliding connection, be equipped with the backup pad on the mount, the backup pad is located sieve otter board keeps away from scrape the one side of tin subassembly, scrape the tin subassembly include sliding connection in support frame on the mount, be fixed in tin cream shower nozzle and sliding connection on the support frame in the first scraper blade and the second scraper blade of tin cream shower nozzle both sides, the tin cream shower nozzle sets up to the cavity type, first scraper blade with be provided with down the subassembly between the second scraper blade.

Through adopting above-mentioned technical scheme, place the circuit board in the backup pad, press in the backup pad and sieve otter board butt. The tin cream is arranged inside the tin cream sprayer, the tin cream is sprayed on the screen plate, then the tin cream sprayed on the screen plate is subjected to reciprocating blade coating through the first scraper blade or the second scraper blade, and the tin cream on the screen plate can be adhered to the circuit board through the pore infiltration on the screen plate, so that the tin cream printing of the circuit board is completed once. First scraper blade or second scraper blade can be on the screen cloth board steadily carry out reciprocal knife coating to each mesh atress above can making the screen cloth board is even, can carry out even infiltration with the tin cream above the circuit board, thereby can be with more even of tin cream printing on the circuit board, with the printing quality who improves the tin cream.

The utility model discloses further set up to, the push down the subassembly includes the depression bar, the both ends of depression bar respectively with first scraper blade with the second scraper blade is articulated, the top of tin cream shower nozzle is provided with the support, the intermediate position cover of depression bar is located on the support, and the depression bar with the support sets up perpendicularly, be provided with first cylinder on the support frame, the telescopic link of first cylinder with the tip fixed connection of depression bar.

Through adopting above-mentioned technical scheme, because the tin cream shower nozzle is located between first scraper blade and the second scraper blade, consequently when the direction motion of tin scraping subassembly towards first scraper blade, first cylinder drive second scraper blade descends to can drive first scraper blade through the depression bar and rise, then can carry out the knife coating on the screen cloth board through the second scraper blade. When the tin scraping assembly moves towards the direction of the second scraping plate, the first air cylinder drives the first scraping plate to descend, so that the second scraping plate can ascend, and tin paste on the screen plate can be subjected to scraping coating through the first air cylinder.

The utility model discloses further set up to, the top of tin cream shower nozzle is connected with a plurality of minutes pipes, and is a plurality of the branch pipe is kept away from the one end of tin cream shower nozzle is connected with the house steward, the house steward with the mount is articulated.

Through adopting above-mentioned technical scheme to get into each minute pipe with the tin cream from the house steward in, then inside entering into the tin cream shower nozzle through each minute pipe, can be inside the tin cream shower nozzle with the even distribution of tin cream, reduce the condition that the tin cream is piled up in the tin cream shower nozzle inside.

The utility model discloses further set up to, the tin cream shower nozzle is close to the one side of screen cloth board is provided with a plurality of round holes, every the round hole all with the branch pipe communicates with each other and sets up.

Through adopting above-mentioned technical scheme, the setting of a plurality of round holes makes the whereabouts that the tin cream can be even on the screen cloth board to can be convenient for first scraper blade or the even each mesh with tin cream knife coating infiltration screen cloth board of second scraper blade.

The utility model discloses further set up to, the both sides of mount all are provided with the fixed plate, every all be provided with the slide rail on the fixed plate, the support frame with slide rail sliding connection, the top of mount is provided with the lead screw, threaded connection has the sliding block on the lead screw, the tip of support frame with the sliding block is articulated.

Through adopting above-mentioned technical scheme, the lead screw rotates, can make the sliding block remove along the length direction of lead screw, and the sliding block can take the carriage to move on the slide rail to can make the tin scraping subassembly carry out reciprocating motion on the screen cloth board.

The utility model discloses further set up to, every the mount is close to a plurality of spouts, every have been seted up to the one side of fixed plate the length direction of spout with the direction mutually perpendicular of slide rail, every the fixed plate is close to the one side of mount is provided with a plurality of gyro wheels, and is a plurality of the gyro wheel is with a plurality of spout roll connection, be provided with the eccentric wheel on the mount, the circumference of eccentric wheel with the fixed plate offsets.

Through adopting above-mentioned technical scheme, when the eccentric wheel rotated, the distance that the center of rotation of eccentric wheel was from between the fixed plate was periodic variation, therefore the eccentric wheel rotates, can make the fixed plate move along the radial direction of eccentric wheel to can make the support frame drive and scrape the tin subassembly and swing at the screen cloth board. After the screen cloth board and the tin scraping component are used for a long time, the phenomenon of abrasion easily occurs, so the tin scraping component is arranged to creep and advance, the attaching degree between the tin scraping component and the screen cloth board is effectively improved, and the tin paste can permeate into the circuit board through meshes on the screen cloth board.

The utility model discloses further set up to, all be fixed with the frame around the screen cloth board, the frame with mount fixed connection, the frame perpendicular to the both sides of scraper blade are provided with a plurality of second cylinders respectively, every on the telescopic link of second cylinder all wears to locate the frame towards the direction of backup pad, it is a plurality of the telescopic link of second cylinder with the both sides fixed connection of backup pad, be provided with the rack in the backup pad.

Through adopting above-mentioned technical scheme, place the circuit board on the rack, drive the second cylinder, the lift through the telescopic link of second cylinder makes mutual butt between circuit board and the sieve net board on the rack to scrape through the tin cream of scraping tin subassembly with above the sieve net board and get, thereby can be more easily with tin cream infiltration coating on the circuit board.

The utility model discloses further set up to, the frame is close to the both sides of screen cloth all are provided with the collecting plate, the collecting plate with first scraper blade sets up perpendicularly, the collecting plate with screen cloth board sliding connection, the collecting plate with be provided with the third cylinder between the frame, the both ends of third cylinder respectively with the frame with collecting plate fixed connection.

Through adopting above-mentioned technical scheme, when scraping the tin cream of tin subassembly reciprocal knife coating on the screen cloth board, the tin cream receives the extrusion easily and piles up at the both ends of scraping the tin subassembly. The third cylinder of drive will collect the board and will pile up the tin cream at screen cloth flange edge towards the position propelling movement of scraping the tin subassembly through the telescopic link of third cylinder to can be to the abundant utilization of tin cream.

To sum up, the utility model discloses following beneficial effect has:

1. through the arrangement of the solder paste spray head, the first scraper plate, the second scraper plate, the branch pipes, the main pipe and the round holes, the solder paste on the circuit board can be printed more uniformly, so that the printing quality of the solder paste is improved;

2. through the arrangement of the sliding groove, the roller and the eccentric wheel, the effect of effectively improving the bonding degree between the tin scraping assembly and the screen plate can be achieved;

3. through the setting of collecting plate and third cylinder, can play and get into make full use of's effect in the middle of the tin cream propelling movement to the screen cloth board above the screen cloth board.

Drawings

Fig. 1 is a schematic view of the overall structure of the solder paste printer of the present embodiment.

Fig. 2 is a schematic view of a connection structure between the support frame and the fixing frame in the present embodiment.

Fig. 3 is a schematic structural diagram of the tin scraping assembly in the embodiment.

Fig. 4 is a partially enlarged schematic view of a portion a in fig. 3.

Fig. 5 is a partially enlarged schematic view of a portion B in fig. 2.

Fig. 6 is a partially enlarged schematic view of a portion C in fig. 2.

Fig. 7 is a schematic structural diagram of the solder paste nozzle in this embodiment.

In the figure, 1, a fixed frame; 2. a tin scraping component; 21. a support frame; 22. a solder paste nozzle; 221. pipe distribution; 222. a header pipe; 223. a circular hole; 23. a first squeegee; 24. a second squeegee; 25. pressing the assembly; 251. a pressure lever; 252. a support; 253. a first cylinder; 3. a screen plate; 4. a support plate; 5. a fixing plate; 51. a slide rail; 52. a lead screw; 53. a slider; 54. a chute; 55. a roller; 56. an eccentric wheel; 6. a frame; 61. a second cylinder; 62. placing a rack; 7. a collection plate; 71. and a third cylinder.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 4, the utility model discloses a solder paste printing machine for circuit board, including mount 1, sliding connection has on mount 1 scrapes tin subassembly 2 to be fixed in screen plate 3 on mount 1, scrape the top that tin subassembly 2 is located screen plate 3, be equipped with backup pad 4 on mount 1, backup pad 4 is located screen plate 3 and keeps away from the one side of scraping tin subassembly 2. The circuit board that will need the solder paste printing is placed in backup pad 4, then with 4 looks butt each other of last pressure of backup pad and screen cloth board 3, piles up the solder paste on screen cloth board 3 and carry out reciprocal blade coating on screen cloth board 3 through scraping tin subassembly 2, makes the solder paste permeate the coating in the mesh of screen cloth board 3 at the circuit board to the completion is printed the solder paste of circuit board. The tin scraping component 2 comprises a support frame 21 connected to the fixed frame 1 in a sliding mode, a tin paste spray head 22 is fixedly arranged on the support frame 21, a first scraping plate 23 and a second scraping plate 24 are connected to two sides of the tin paste spray head 22 in a sliding mode, the tin paste spray head 22 is set to be a hollow type, tin paste is contained in the tin paste spray head 22, and a pressing component 25 is arranged between the first scraping plate 23 and the second scraping plate 24. When the solder paste is printed, the solder paste is coated on the screen plate 3, and then the solder paste on the screen plate 3 is subjected to blade coating through the first scraper blade 23 and the second scraper blade 24, so that the solder paste on the screen plate 3 can permeate into a circuit board attached to the screen plate 3 through meshes on the screen plate 3, and the solder paste printing on the circuit board is completed.

Referring to fig. 4, since the solder paste nozzle 22 is disposed between the first squeegee 23 and the second squeegee 24, the solder paste sprayed will be located between the first squeegee 23 and the second squeegee 24, so that when the solder mask assembly 2 needs to be drawn in the direction of the second squeegee 24, the screen plate 3 is drawn by the first squeegee 23, and conversely, the screen plate 24 is drawn by the second squeegee 24. Therefore, the first scraper 23 and the second scraper 24 need to be set to be linked, so the pressing assembly 25 includes a pressing rod 251, two ends of the pressing rod 251 are respectively hinged with the first scraper 23 and the second scraper 24, and the middle section of the pressing rod 251 is fixedly connected with the solder paste nozzle 22. The top of the solder paste nozzle 22 is provided with a bracket 252, the middle position of the pressure bar 251 is sleeved on the bracket 252, the pressure bar 251 and the bracket 252 are vertically arranged, the support frame 21 is provided with a first cylinder 253, and the telescopic rod of the first cylinder 253 is fixedly connected with the end part of the pressure bar 251. The telescopic rod of the first cylinder 253 is fixedly connected with the end part of the pressure rod 251 close to the first scraper 23, when the telescopic rod moves towards the direction of the first scraper 23, the telescopic rod of the first cylinder 253 is driven to extend, the pressure plate can be pressed downwards, the first scraper 23 can be pressed downwards, the second scraper 24 can be lifted, and otherwise, the telescopic rod of the first cylinder 253 can be compressed.

Referring to fig. 4, in order to uniformly spray the solder paste on the screen plate 3, a plurality of circular holes 223 (as shown in fig. 7) are formed on a surface of the solder paste nozzle 22 close to the screen plate 3, so that the solder paste inside the solder paste nozzle 22 can be uniformly dropped on the screen plate 3 through the circular holes 223, thereby facilitating the uniform printing of the solder paste on the circuit board by the first scraper 23 and the second scraper 24. The top of the solder paste nozzle 22 is connected with a plurality of branch pipes 221, one ends of the branch pipes 221 far away from the solder paste nozzle 22 are connected with a main pipe 222, the main pipe 222 is hinged with the fixed frame 1, and each round hole 223 is communicated with the branch pipes 221. The worker intermittently places the solder paste in the main pipe 222, and then stores the solder paste uniformly inside the solder paste nozzle 22 through the branch pipes 221, so that the amount of the solder paste extruded by the round holes 223 can be more uniform.

Referring to fig. 5 and 6, the fixed plates 5 are disposed on both sides of the fixed frame 1, a slide rail 51 is disposed on each fixed plate 5, and the support frame 21 slides back and forth on the slide rail 51, so as to drive the solder paste nozzle 22, the first scraper 23, and the second scraper 24 to slide back and forth on the screen plate 3. The top of the fixed frame 1 is provided with a screw 52, the screw 52 is connected with a sliding block 53 by screw thread, and the end part of the supporting frame 21 is hinged with the sliding block 53. Because the sliding block 53 is hinged to the supporting frame 21, when the lead screw 52 rotates forward or backward, the sliding block 53 can move along the length direction of the lead screw 52, so as to drive the supporting frame 21 to reciprocate along the length direction of the slide rail 51, i.e. the solder paste nozzle 22, the first scraper 23 and the second scraper 24 can slide on the screen plate 3 in a reciprocating manner. Since an error is easily generated when the first scraper 23 or the second scraper 24 slides on the screen plate 3, or the screen plate 3 and the first scraper 23 or the second scraper 24 are easily worn after being used for a long time. Therefore, a plurality of sliding grooves 54 are formed in one surface, close to the fixing plate 5, of each fixing frame 1, the length direction of each sliding groove 54 is perpendicular to the length direction of the sliding rail 51, a plurality of rollers 55 are arranged on one surface, close to the fixing frame 1, of each fixing plate 5, the rollers 55 are in rolling connection with the sliding grooves 54, an eccentric wheel 56 is arranged on the fixing frame 1, and the circumference of the eccentric wheel 56 abuts against the fixing plate 5. When the eccentric wheel 56 rotates, the distance between the rotation center of the eccentric wheel 56 and the fixed plate 5 is periodically changed, that is, the fixed plate 5 can reciprocate along the radial direction of the eccentric wheel 56, so that the support frame 21 can drive the tin scraping assembly 2 to swing on the screen plate 3. When the screw 52 and the eccentric wheel 56 rotate simultaneously, the first scraper 23 or the second scraper 24 can swing on the screen plate 3 to advance, namely creep on the screen plate 3 to advance, so that the bonding degree between the tin scraping component 2 and the screen plate 3 can be effectively improved, and tin paste can permeate into a circuit board through meshes on the screen plate 3.

Referring to fig. 6, a frame 6 is fixed around the screen plate 3, the frame 6 is fixedly connected with the fixing frame 1, a plurality of second cylinders 61 are respectively arranged on two sides of the frame 6 perpendicular to the first scraper 23, an expansion link of each second cylinder 61 penetrates the frame 6 in the direction of the support plate 4, the expansion links of the plurality of second cylinders 61 are fixedly connected with two sides of the support plate 4, and the support plate 4 is provided with a placing frame 62 (as shown in fig. 2). Place the circuit board on rack 62, drive second cylinder 61, the lift of the telescopic link through second cylinder 61 makes circuit board and sieve net board 3 on the rack 62 between mutual butt to scrape the tin cream of tin subassembly 2 on with sieve net board 3 and get, make tin cream permeate more easily and coat on the circuit board. Scrape tin subassembly 2 reciprocal when carrying out the knife coating tin cream on screen cloth board 3, the tin cream receives the extrusion easily and piles up at the both ends of scraping tin subassembly 2, in order to improve the utilization ratio of tin cream, the both sides that are close to screen cloth board 3 at frame 6 all are provided with collecting plate 7, collecting plate 7 sets up with first scraper blade 23 is perpendicular, collecting plate 7 and screen cloth board 3 sliding connection, be provided with third cylinder 71 between collecting plate 7 and the frame 6, the both ends of third cylinder 71 respectively with frame 6 with collecting plate 7 fixed connection. The third cylinder 71 is driven, and the collecting plate 7 is pushed towards the position of the tin scraping component 2 by the telescopic rod of the third cylinder 71, so that the tin paste can be fully utilized.

The implementation principle of the above embodiment is as follows: the circuit board is placed on the placing frame 62, the second air cylinder 61 is driven, and the circuit board on the placing frame 62 is abutted to the screen plate 3 through the lifting of the telescopic rod of the second air cylinder 61. At the inside tin cream of adorning of tin cream shower nozzle 22, with the tin cream spraying on screen cloth board 3, when the direction motion of tin scraping subassembly 2 towards first scraper blade 23, first cylinder 253 drive second scraper blade 24 descends to can drive first scraper blade 23 through depression bar 251 and rise, then can pass through second scraper blade 24 and carry out the knife coating on screen cloth board 3. When the tin scraping assembly 2 moves towards the direction of the second scraping plate 24, the first air cylinder 253 drives the first scraping plate 23 to descend, so that the second scraping plate 24 can ascend, and tin paste on the screen plate 3 can be scraped through the first air cylinder 253. Solder paste on the screen plate 3 can permeate into the pores on the screen plate 3 and adhere to the circuit board, thereby completing one-time solder paste printing of the circuit board. The driving screw 52 and the eccentric wheel 56 rotate simultaneously, so that the first scraper 23 or the second scraper 24 can swing on the screen plate 3 to advance, namely, the first scraper can creep on the screen plate 3 to advance, thereby enabling the stress of each mesh on the screen plate 3 to be even, namely, enabling the solder paste to uniformly permeate into the circuit board, and further enabling the solder paste on the circuit board to be printed more uniformly to improve the printing quality of the solder paste.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a tin cream printing machine for circuit board, includes mount (1), sliding connection in scrape tin subassembly (2) above mount (1) and be fixed in sieve otter board (3) on mount (1), scrape tin subassembly (2) with sieve otter board (3) sliding connection, its characterized in that: be equipped with backup pad (4) on mount (1), backup pad (4) are located screen cloth board (3) are kept away from scrape the one side of tin subassembly (2), scrape tin subassembly (2) including sliding connection in support frame (21) on mount (1), be fixed in tin cream shower nozzle (22) and sliding connection on support frame (21) in first scraper blade (23) and second scraper blade (24) of tin cream shower nozzle (22) both sides, tin cream shower nozzle (22) set up to the cavity type, first scraper blade (23) with be provided with between second scraper blade (24) and push down subassembly (25).

2. A solder paste printer according to claim 1, wherein: the pressing assembly (25) comprises a pressing rod (251), two ends of the pressing rod (251) are hinged to the first scraper (23) and the second scraper (24) respectively, a support (252) is arranged at the top of the solder paste sprayer (22), the middle of the pressing rod (251) is sleeved on the support (252), the pressing rod (251) and the support (252) are vertically arranged, a first air cylinder (253) is arranged on the support frame (21), and a telescopic rod of the first air cylinder (253) is fixedly connected with the end of the pressing rod (251).

3. A solder paste printer according to claim 2, wherein: the top of the solder paste nozzle (22) is connected with a plurality of branch pipes (221), one ends, far away from the solder paste nozzle (22), of the branch pipes (221) are connected with a main pipe (222), and the main pipe (222) is hinged to the fixing frame (1).

4. A solder paste printer according to claim 3, wherein: one surface of the solder paste spray head (22) close to the screen plate (3) is provided with a plurality of round holes (223), and each round hole (223) is communicated with the branch pipe (221).

5. A solder paste printer according to claim 1, wherein: the both sides of mount (1) all are provided with fixed plate (5), every all be provided with slide rail (51) on fixed plate (5), support frame (21) with slide rail (51) sliding connection, the top of mount (1) is provided with lead screw (52), threaded connection has sliding block (53) on lead screw (52), the tip of support frame (21) with sliding block (53) are articulated.

6. A solder paste printer according to claim 5, wherein: every the mount (1) is close to the one side of fixed plate (5) has seted up a plurality of spouts (54), every the length direction of spout (54) with the direction mutually perpendicular of slide rail (51), every fixed plate (5) are close to the one side of mount (1) is provided with a plurality of gyro wheels (55), and is a plurality of gyro wheel (55) and a plurality of spout (54) roll connection, be provided with eccentric wheel (56) on mount (1), the circumference of eccentric wheel (56) with fixed plate (5) offset.

7. A solder paste printer according to claim 1, wherein: all be fixed with frame (6) around sieve otter board (3), frame (6) with mount (1) fixed connection, frame (6) perpendicular to the both sides of first scraper blade (23) are provided with a plurality of second cylinders (61) respectively, every on frame (6) is worn to locate to the telescopic link of second cylinder (61) all towards the direction of backup pad (4), a plurality of the telescopic link of second cylinder (61) with the both sides fixed connection of backup pad (4), be provided with rack (62) on backup pad (4).

8. A solder paste printer according to claim 7, wherein: frame (6) are close to the both sides of sieve mesh board (3) all are provided with collecting plate (7), collecting plate (7) with first scraper blade (23) set up perpendicularly, collecting plate (7) with sieve mesh board (3) sliding connection, collecting plate (7) with be provided with third cylinder (71) between frame (6), the both ends of third cylinder (71) respectively with frame (6) with collecting plate (7) fixed connection.