CN213007043U

CN213007043U - SMT printing device

Info

Publication number: CN213007043U
Application number: CN202021549838.3U
Authority: CN
Inventors: 张梅
Original assignee: Wan'an Yugao Electronic Technology Co ltd
Current assignee: Wan'an Yugao Electronic Technology Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-04-20
Anticipated expiration: 2030-07-30

Abstract

The utility model discloses a SMT printing device belongs to SMT production frock technical field, and this SMT printing device includes: the PCB fixing assembly comprises a base, a buffer cushion, a plurality of limiting blocks and a plurality of fixing blocks, wherein the buffer cushion is arranged on the base, the steel mesh is arranged above the buffer cushion and is used for placing a PCB, and the limiting blocks are symmetrically arranged at two ends of the steel mesh; the driving assembly comprises a lead screw, a lead screw sliding block and a motor, the lead screw and the motor are both arranged on the base, and the motor is used for driving the lead screw; the tin cream scraping component comprises a cylinder, a knife rest, scrapers and anti-overflow plates, the cylinder is connected with a lead screw slide block through a connecting rod, the knife rest is fixedly connected with the telescopic end of the cylinder, the scrapers are arranged on the knife rest and are in contact with a steel mesh, the two anti-overflow plates are arranged on the scrapers and are attached to the surfaces of the scrapers, and the two anti-overflow plates are all in sliding connection with the knife rest. This SMT printing device can realize two-way operation, accomplishes two-way brush tin cream, can prevent simultaneously that the follow scraper both sides of tin cream from spilling over.

Description

SMT printing device

Technical Field

The utility model relates to a SMT production frock technical field, more specifically the utility model relates to a SMT printing device that says so.

Background

At present, a printed circuit board PCB of an electronic product is generally configured with a plurality of electronic components, such as chips, resistors, capacitors, inductors, and the like, so as to form a circuit with a specific function; therefore, the PCB board may be provided with a plurality of soldering points for soldering the electronic components, and in order to obtain a better soldering effect and improve soldering efficiency, before soldering the electronic components, a layer of solder paste may be first applied to the soldering points of the PCB board. When the PCB is coated with solder paste, a solder paste printer is often used.

The SMT tin paste printing device comprises an operation table, a guide rail, a linear driving shaft, a first connecting device, a cylinder, a second connecting device, a scraper fixing frame, a scraper and a motor, wherein the guide rail is arranged on the operation table, the guide rail is fixed on the operation table, the guide rail is connected with the linear driving shaft, the driving device of the linear driving shaft is the motor, the linear driving shaft is fixedly connected with the first connecting device, the first connecting device is fixedly connected with the cylinder, the cylinder is fixedly connected with the second connecting device, the lower part of the second connecting device is fixed with the scraper fixing frame, the scraper is arranged below the scraper fixing frame, a buffer pad is further arranged on one side of the guide rail, a printed circuit board is placed on the buffer pad, a screen plate is arranged on the printed circuit board, positioning devices are arranged at two ends of the screen plate, and the screen plate is fixed through the positioning devices; the utility model has the advantages of simple structure, labor saving, convenient operation and even solder joint printing. However, the utility model discloses a scraper is at the printing in-process, can make unnecessary tin cream can spill over and form from the both sides of scraper and pile up, do not in time retrieve the tin cream, cause the waste of tin cream, the long-time direct current of tin cream that spills over moreover can lead to volatilizing of tin cream in the air and become invalid, can influence electronic components's welding quality, lead to components and parts desoldering, rosin joint, and then produce harmful effects to the quality of PCB board, and simultaneously, the device can only single blade coating tin cream.

Therefore, how to provide an SMT printing apparatus that solves the problem that in the prior art, the redundant solder paste overflows during the operation of the solder paste printer, and the bidirectional blade coating of the solder paste cannot be achieved is a problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a SMT printing device, aim at solve among the prior art tin cream printing machine at the printing in-process, can only one-way brush tin cream, prevent the problem that tin cream spills over from the scraper both sides simultaneously.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an SMT printing device comprising:

the PCB fixing assembly comprises a base, a buffer pad, a plurality of steel meshes and limiting blocks, wherein the buffer pad is arranged on the base, the steel meshes are arranged above the buffer pad, a PCB is placed between the steel meshes and the buffer pad, and the limiting blocks are symmetrically arranged at two ends of the steel meshes;

the driving assembly comprises a lead screw, a lead screw sliding block and a motor, the lead screw and the motor are both arranged on the base, the lead screw is arranged on one side of the steel mesh, the lead screw sliding block is arranged on the lead screw, and the motor is used for driving the lead screw;

scrape the tin cream subassembly, scrape the tin cream subassembly and include cylinder, knife rest, scraper and anti-overflow plate, the cylinder with the lead screw slider passes through the connecting rod and connects, the knife rest with the flexible end fixed connection of cylinder, be equipped with on the knife rest the scraper, the scraper with the steel mesh contact is connected, be equipped with two on the scraper the anti-overflow plate, two the anti-overflow plate with the laminating of scraper surface, two the anti-overflow plate all with knife rest sliding connection.

Furthermore, scrape the tin cream subassembly and be equipped with two, two scrape the tin cream subassembly and set up in opposite directions and the centre leaves the clearance.

Furthermore, the knife rest is provided with sliding clamping grooves extending along the directions of the two sides of the scraper, the spill-proof plate is provided with clamping blocks matched with the sliding clamping grooves, and the clamping blocks are clamped into the sliding clamping grooves to enable the spill-proof plate to move along the directions of the two sides of the scraper on the knife rest.

Further, the two spill plates incline towards the direction away from the two sides of the scraper to form a gathering surface.

Further, the lower end of the scraper blade is inclined to the direction away from the tool rest.

Furthermore, the material of blotter is flexible material.

Further, the motor is a servo motor.

Furthermore, the spill plate is made of elastic rubber and is integrally formed.

According to the technical scheme, compare with prior art, the utility model provides a SMT printing device, be equipped with two scrapers that set up in opposite directions through on the knife rest, can realize that this SMT printing device can two-way operation, accomplish two-way tin cream of brushing, through be equipped with the sliding clamping groove on the knife rest, can realize sliding at the scraper surface with the anti-overflow board of the laminating on scraper surface, can realize scribbling tin cream to the solder joint of the PCB board of different width, can prevent simultaneously that tin cream from spilling over from the scraper both sides, cause tin cream to pile up extravagantly in the steel mesh both sides, collect and utilize untimely can lead to causing solder joint to appear rosin joint on the PCB board, influence the quality of PCB board.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an SMT printing apparatus according to the present invention;

FIG. 2 is a schematic view of another SMT printing apparatus according to the present invention;

fig. 3 is a schematic structural diagram of the SMT printing apparatus blade carrier, the scraper, and the anti-overflow plate provided by the present invention.

In the figure: 1 is a PCB board fixing component; 11 is a base; 12 is a cushion pad; 13 is a steel mesh; 14 is a limiting block; 2 is a driving component; 21 is a lead screw; 22 is a lead screw slide block; 23 is a motor; 3, a solder paste scraping component; 31 is a cylinder; 32 is a tool holder; 33 is a scraper; 34 is an overflow prevention plate; 4 is a sliding clamping groove; and 5, a PCB.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, an embodiment of the present invention discloses an SMT printing apparatus, including: PCB board fixed subassembly 1, drive assembly 2 and scraping tin cream subassembly 3.

PCB board fixed subassembly 1 includes base 11, blotter 12, steel mesh 13 and stopper 14, blotter 12 is located on base 11, the material of blotter 12 is flexible material, blotter 12 top is located to steel mesh 13, be used for placing PCB board 5 between steel mesh 13 and the blotter 12, stopper 14 is equipped with a plurality ofly, in this embodiment, stopper 14 is equipped with four, two settings are at the left end of steel mesh 13, two settings are at the right-hand member of steel mesh 13, stopper 14 can fix steel mesh 13 in PCB board 5's top according to predetermineeing the position, can press from both sides PCB board 5 simultaneously and establish between blotter 12 and steel mesh 13.

Drive assembly 2 includes lead screw 21, lead screw slider 22 and motor 23, lead screw 21 and motor 23 all set up on base 11, lead screw 21 locates steel mesh 13 one side, lead screw slider 22 is located on lead screw 21, lead screw slider 22's bottom and 11 surface contact on the base, motor 23 is used for driving lead screw 21 and rotates, and then control lead screw slider 22 transmission on lead screw 21, wherein, motor 23 is servo motor, lead screw 21 is fixed in on the base 11 through two cylindrical roller bearings, motor 23's output shaft passes through the coupling joint with lead screw 21, realize the moving direction of lead screw slider 22 on lead screw 21 through motor 23's positive and negative rotation.

Scrape tin cream subassembly 3 and include cylinder 31, knife rest 32, scraper 33 and anti-overflow plate 34, and cylinder 31 passes through the connecting rod with lead screw slider 22 and is connected, and knife rest 32 and cylinder 31's flexible end fixed connection are equipped with scraper 33 on the knife rest 32, and scraper 33 is connected with the contact of steel mesh 13, is equipped with two anti-overflow plate 34 on the scraper 33, and two anti-overflow plate 34 and scraper 33 surface laminating, two anti-overflow plate 34 all with knife rest 32 sliding connection, wherein, anti-overflow plate 34 is elastic rubber material and integrated into one piece.

In the above embodiment, there are two solder paste scraping assemblies 3, two solder paste scraping assemblies 3 are oppositely arranged with a gap in between, the knife rest 32 includes a horizontal frame and two vertical plates, the two vertical plates are parallel to each other, upper ends of the two vertical plates are fixedly connected with the horizontal frame, a central position of the horizontal frame is fixedly connected with a telescopic end of the air cylinder 31, a fixed end of the air cylinder 31 is fixedly connected with the screw slider 22 through a mutually perpendicular connecting rod, the two scrapers 33 are respectively and fixedly mounted at lower ends of the two vertical plates, wherein lower ends of the two scrapers 33 incline in a direction away from the knife rest 32, the two scrapers 33 form a splayed structure, the two vertical plates are respectively provided with a sliding clamping groove 4 extending along two sides of the scrapers 33, the spill-proof plate 34 is provided with a clamping block adapted to the sliding clamping groove 4, the clamping block is clamped into the sliding clamping groove 4 so that the spill-proof plate 34 moves, two spill plates 34 are mounted on each vertical plate, the two spill plates 34 incline towards the two sides far away from the scraper 33 to form a converging surface, and the lower ends of the spill plates 34 are in contact with the steel net 13.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An SMT printing device, comprising:

the PCB fixing assembly (1) comprises a base (11), a buffer pad (12), a steel mesh (13) and limit blocks (14), wherein the buffer pad (12) is arranged on the base (11), the steel mesh (13) is arranged above the buffer pad (12), a PCB (5) is placed between the steel mesh (13) and the buffer pad (12), a plurality of limit blocks (14) are arranged, and the limit blocks (14) are symmetrically arranged at two ends of the steel mesh (13);

the driving assembly (2) comprises a lead screw (21), a lead screw sliding block (22) and a motor (23), the lead screw (21) and the motor (23) are both arranged on the base (11), the lead screw (21) is arranged on one side of the steel mesh (13), the lead screw sliding block (22) is arranged on the lead screw (21), and the motor (23) is used for driving the lead screw (21);

scrape tin cream subassembly (3), scrape tin cream subassembly (3) including cylinder (31), knife rest (32), scraper (33) and anti-overflow plate (34), cylinder (31) with lead screw slider (22) are connected through the connecting rod, knife rest (32) with the flexible end fixed connection of cylinder (31), be equipped with on knife rest (32) scraper (33), scraper (33) with steel mesh (13) contact is connected, be equipped with two on scraper (33) anti-overflow plate (34), two anti-overflow plate (34) with scraper (33) surface laminating, two anti-overflow plate (34) all with knife rest (32) sliding connection.

2. An SMT printing device according to claim 1, wherein two solder paste scraping assemblies (3) are provided, the two solder paste scraping assemblies (3) being arranged in opposition with a gap therebetween.

3. An SMT printing device according to claim 1, wherein the blade holder (32) is provided with sliding slots (4) extending along two sides of the scraper (33), the spill plate (34) is provided with clamping blocks adapted to the sliding slots (4), and the clamping blocks are clamped in the sliding slots (4) so that the spill plate (34) moves on the blade holder (32) along two sides of the scraper (33).

4. An SMT printing device according to claim 3, wherein the spill plates (34) are angled away from the blade (33) to form converging surfaces.

5. An SMT printing device according to claim 3, wherein the lower end of the blade (33) is angled away from the blade holder (32).

6. An SMT printing device according to claim 1, wherein the cushion pad (12) is a flexible material.

7. An SMT printing device according to claim 1, wherein the motor (23) is a servo motor.

8. An SMT printing device according to claim 1, wherein the spill plate (34) is formed integrally from a resilient rubber material.