Solder paste printing machine

Abstract

The utility model relates to the technical field of solder paste smearing, in particular to a solder paste printing machine which comprises a bottom plate, a containing groove is formed in the upper end of the bottom plate, a steel plate is fixedly arranged at the upper end of the containing groove, a limiting assembly is arranged at the position, below the steel plate, of the bottom plate, and a vertical plate is fixedly connected to the upper end of the bottom plate. A solder paste smearing assembly is arranged on the vertical plate, and a scraping assembly is further arranged at the upper end of the bottom plate. Manual operation is assisted to a great extent, tin paste can be added at fixed time and fixed point according to the use amount of the tin paste, the tin discharging amount can be adjusted by arranging the combination of the electric push rod and the material extruding plate, and the situation that the tin paste is not added in time due to negligence of personnel during operation, and plate washing is needed due to large-batch printing skip printing is avoided; and a series of related problems such as poor welding caused by volatilization of the soldering flux due to long storage time of the solder paste in the air due to excessive addition of the solder paste during manual operation are also avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field that tin paste daubed, specifically relates to a tin paste printing machine. BACKGROUND

[0002] Many electronic components, such as chips, resistors, capacitors and inductors, are generally configured on the printed circuit board (PCB) in electronic products to form a circuit with a specific function; therefore, a plurality of welding points for welding the above-mentioned electronic components are provided on the PCB, and in order to obtain a better welding effect and improve the welding efficiency, a layer of tin paste is first daubed on the welding points of the PCB before welding the above-mentioned electronic components. When daubing tin paste on the PCB, a tin paste printing machine is often used.

[0003] The tin paste printing machine is almost indispensable in the application of the SMT industry, which prints tin paste evenly on the PCB through track transmission, image recognition and automatic alignment. We need to observe the amount of tin paste from time to time to determine whether to add tin paste.

[0004] The existing tin paste printing machine has the following inconveniences in the working process:

[0005] 1. The amount of tin paste added cannot be controlled;

[0006] 2. The tin paste is not added in time, resulting in the occurrence of batch defective printed products. INVENTION CONTENTS

[0007] In view of the above-mentioned shortcomings of the prior art, the utility model provides a tin paste printing machine, which can effectively solve the problems of the prior art tin paste printing machine, such as the amount of tin paste added cannot be controlled and the tin paste is not added in time, resulting in the occurrence of batch defective printed products.

[0008] To achieve the above-mentioned purposes, the utility model realizes the following technical solutions:

[0009] The utility model provides a kind of tin paste printing machine, including bottom plate, the upper end of the bottom plate is equipped with placing groove, the upper end of the placing groove is fixedly arranged with steel plate, the bottom plate is below steel plate and is provided with limiting component, the upper end of the bottom plate is fixedly connected with vertical plate, the vertical plate is provided with tin paste daubing component, the upper end of the bottom plate is also provided with scraping component;

[0010] The tin paste smearing assembly comprises a horizontal plate fixedly connected to the front end of the vertical plate, a cartridge is arranged at the upper end of the horizontal plate, an L-shaped mounting plate is fixedly connected to the upper end of the horizontal plate, an electric push rod is fixedly installed at the upper end of the L-shaped mounting plate, the telescopic end of the electric push rod is fixedly connected with an extrusion plate in sliding connection with the cartridge, the front end of the vertical plate is rotatably connected with a first reciprocating screw rod, a first rotary motor for driving the first reciprocating screw rod to rotate is fixedly installed at the rear end of the vertical plate, a first sliding block is in sliding fit with the rod body of the first reciprocating screw rod, a discharging nozzle is arranged at the lower end of the first sliding block, and a material conveying pipe is arranged in communication between the cartridge and the vertical plate and passes through the first sliding block.

[0011] According to the tin paste printing machine, the front end of the vertical plate is fixedly connected with a guide rod, and the guide rod passes through the first sliding block.

[0012] According to the tin paste printing machine, the limiting assembly comprises two sliding rods symmetrically and slidably connected with the bottom plate, limiting springs are fixedly connected between the sliding rods and the bottom plate, and the front ends of the two sliding rods are fixedly connected with a limiting plate.

[0013] According to the tin paste printing machine, the material scraping assembly comprises a limiting groove formed in the upper end of the bottom plate, a second reciprocating screw rod is rotatably connected in the limiting groove, a second rotary motor for driving the second reciprocating screw rod to rotate is fixedly installed on the inner side wall of the limiting groove, a second sliding block is in sliding fit with the rod body of the second reciprocating screw rod, a connecting block is fixedly connected to the upper end of the second sliding block, and a scraper is fixedly connected to the rear end of the connecting block.

[0014] According to the tin paste printing machine, the limiting groove is square-shaped, and the second sliding block is in sliding connection with the limiting groove.

[0015] According to the tin paste printing machine, a PCB main body is arranged in the placing groove, and the size of the PCB main body corresponds to that of the steel plate.

[0016] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0017] The utility model greatly assists manual operation, can achieve the purpose of adding tin paste at fixed time and fixed point according to the amount of tin paste, can adjust the amount of tin paste by combining the electric push rod and the extrusion plate, avoids the problem that the tin paste is not added in time due to negligence during manual operation, causes a large number of printing omissions to need to wash the plate, avoids the problem that the tin paste is excessively added during manual operation, prolongs the storage time of the tin paste in the air, causes the volatilization of the soldering flux and a series of related problems such as poor welding. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 It is a structural schematic view of the first perspective of the present application.

[0020] Figure 2 It is a structural schematic view of the second perspective of the present application.

[0021] Figure 3 It is Figure 1 It is an enlarged structural schematic view of part A.

[0022] Reference signs: 1, bottom plate; 2, placing groove; 3, steel plate; 4, vertical plate; 5, horizontal plate; 6, barrel; 7, L-shaped mounting plate; 8, electric push rod; 9, extrusion plate; 10, first reciprocating screw; 11, first rotary motor; 12, first sliding block; 13, material conveying pipe; 14, discharge nozzle; 15, guide rod; 16, limiting groove; 17, second reciprocating screw; 18, second rotary motor; 19, second sliding block; 20, connecting block; 21, scraper; 22, sliding rod; 23, limiting spring; 24, limiting plate. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] The present application will be further described below in combination with embodiments.

[0025] Embodiment: refer to Figures 1 to 3 A tin paste printing machine, comprising a bottom plate 1, a placing groove 2 is formed in the upper end of the bottom plate 1, a steel plate 3 is fixedly arranged at the upper end of the placing groove 2, a PCB plate body is placed in the placing groove 2, and the size of the PCB plate body corresponds to the size of the steel plate 3, the bottom plate 1 of the device is provided with the placing groove 2 for placing the PCB plate body, and the size of the placing groove 2 is consistent with the size of the steel plate 3, so as to ensure that the tin paste is evenly printed on the PCB plate body through the steel plate 3 opening.

[0026] The bottom plate 1 is provided with a limiting assembly below the steel plate 3, specifically, the limiting assembly comprises two sliding rods 22 symmetrically connected with the bottom plate 1, the sliding rods 22 are fixedly connected with the bottom plate 1 and limiting springs 23, the front ends of the two sliding rods 22 are fixedly connected with a limiting plate 24, the limiting assembly is arranged below the bottom plate 1, the two sliding rods 22 are symmetrically connected with the bottom plate 1 and fixed through the limiting springs 23, and the front ends of the two sliding rods 22 are fixedly connected with the limiting plate 24; when the PCB plate body is placed, the limiting springs 23 are stretched, the limiting plate 24 plays a positioning role, and the PCB plate body is stable and accurate in position during printing.

[0027] The upper end of the bottom plate 1 is fixedly connected with a vertical plate 4, the vertical plate 4 is provided with a tin paste smearing assembly, specifically, the tin paste smearing assembly comprises a horizontal plate 5 fixedly connected with the front end of the vertical plate 4, a cartridge 6 is arranged on the upper end of the horizontal plate 5, an L-shaped mounting plate 7 is fixedly connected with the upper end of the horizontal plate 5, an electric push rod 8 is fixedly installed on the upper end of the L-shaped mounting plate 7, the telescopic end of the electric push rod 8 is fixedly connected with an extrusion plate 9 in sliding connection with the cartridge 6 through the L-shaped mounting plate 7, and the electric push rod 8 drives the tin paste out of the cartridge 6 by pushing the extrusion plate 9 downward; by controlling the downward displacement of the extrusion plate 9, the amount of tin paste out of the cartridge 6 is controlled, and waste is avoided.

[0028] The front end of the vertical plate 4 is rotatably connected with a first reciprocating screw rod 10, the rear end of the vertical plate 4 is fixedly installed with a first rotary motor 11 for driving the first reciprocating screw rod 10 to rotate, the rod body of the first reciprocating screw rod 10 is slidably connected with a first sliding block 12, the lower end of the first sliding block 12 is provided with a discharge nozzle 14, the front end of the vertical plate 4 is fixedly connected with a guide rod 15, and the guide rod 15 passes through the first sliding block 12, the guide rod 15 is arranged to limit the first sliding block 12, so that the first reciprocating screw rod 10 can drive the first sliding block 12 to move horizontally on the rod body of the first reciprocating screw rod 10.

[0029] The cartridge 6 is in communication with the vertical plate 4 and is provided with a material conveying pipe 13, and the material conveying pipe 13 passes through the first sliding block 12, the first sliding block 12 drives the material conveying pipe 13 and the discharge nozzle 14 in communication with the lower end of the material conveying pipe 13 to move horizontally to discharge, so that the discharge nozzle 14 reciprocates on the surface of the PCB plate to complete the smearing of the tin paste.

[0030] The upper end of the bottom plate 1 is further provided with a scraping assembly, specifically, the scraping assembly comprises a limiting groove 16 opened at the upper end of the bottom plate 1, a second reciprocating lead screw 17 is rotatably connected in the limiting groove 16, a second rotary motor 18 for driving the second reciprocating lead screw 17 to rotate is further fixedly installed on the inner side wall of the limiting groove 16, a second sliding block 19 is slidingly fitted on the rod body of the second reciprocating lead screw 17, the shape of the limiting groove 16 is square, and the second sliding block 19 is slidingly connected with the limiting groove 16, in order to ensure that the solder paste is uniformly and accurately applied, the second rotary motor 18 controls the rotation of the second reciprocating lead screw 17, and drives the second sliding block 19 to reciprocate.

[0031] The upper end of the second sliding block 19 is fixedly connected with a connecting block 20, and the rear end of the connecting block 20 is fixedly connected with a scraper 21; the reciprocating movement of the second sliding block 19 drives the scraper 21 to reciprocate on the upper end face of the steel plate 3, so that the solder paste is uniformly and smoothly printed on the upper end of the PCB main body through the hole of the steel plate 3.

[0032] The working principle of the utility model is as follows:

[0033] In order to ensure that the PCB main body is stable and accurate in position during the printing process, a limiting assembly is installed below the bottom plate 1, the limiting assembly is composed of two sliding rods 22, a limiting spring 23 and a limiting plate 24; when the PCB is placed into the placing groove 2, the limiting spring 23 is stretched, and the limiting plate 24 can fix the position of the PCB, so that the PCB does not move during the printing process;

[0034] The electric push rod 8 adjusts the discharging amount of the solder paste by controlling the up-down movement of the extrusion plate 9; by adjusting the extension of the electric push rod 8, the flow of the solder paste can be controlled, waste is avoided, and the first rotary motor 11 driving the first reciprocating lead screw 10 to rotate is matched; by the rotation of the first reciprocating lead screw 10, the first sliding block 12 is driven to move horizontally, and then the discharging nozzle 14 is driven to reciprocate on the surface of the steel plate 3 and ensure the uniformity of the solder paste application;

[0035] In order to ensure that the solder paste is uniformly printed on the PCB through the hole of the steel plate 3, the bottom plate 1 is further provided with a scraping assembly, the second reciprocating lead screw 17 is driven by the second rotary motor 18 to reciprocate, and the scraper 21 is reciprocated above the steel plate 3 through the connecting block 20, so that the solder paste is uniformly transferred to the surface of the PCB main body through the hole of the steel plate, and accurate solder paste printing is completed.

[0036] The above examples are only used to illustrate the technical solutions of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A solder paste printer characterized by comprising: The application relates to a PCB board tin paste coating device, which comprises a bottom plate (1), a placing groove (2) formed in the upper end of the bottom plate (1), a steel plate (3) fixedly arranged at the upper end of the placing groove (2), a limiting assembly arranged below the steel plate (3), a vertical plate (4) fixedly connected to the upper end of the bottom plate (1), a tin paste coating assembly arranged on the vertical plate (4), and a material scraping assembly arranged at the upper end of the bottom plate (1). The tin paste coating assembly comprises a horizontal plate (5) fixedly connected to the front end of the vertical plate (4), a material cylinder (6) arranged at the upper end of the horizontal plate (5), an L-shaped mounting plate (7) fixedly connected to the upper end of the horizontal plate (5), an electric push rod (8) fixedly arranged at the upper end of the L-shaped mounting plate (7), an extrusion plate (9) fixedly connected to the electric push rod (8) and slidably connected to the material cylinder (6), a first reciprocating screw rod (10) rotatably connected to the front end of the vertical plate (4), a first rotary motor (11) fixedly arranged at the rear end of the vertical plate (4) and used for driving the first reciprocating screw rod (10) to rotate, a first sliding block (12) slidably arranged on the first reciprocating screw rod (10), a discharging nozzle (14) arranged at the lower end of the first sliding block (12), and a material conveying pipe (13) arranged between the material cylinder (6) and the vertical plate (4) and penetrating through the first sliding block (12).

2. The solder paste printer according to claim 1, wherein The front end of the vertical plate (4) is fixedly connected with a guide rod (15), and the guide rod (15) penetrates through the first sliding block (12).

3. The solder paste printer according to claim 1, wherein The limiting assembly comprises two sliding rods (22) symmetrically and slidably connected to the bottom plate (1), limiting springs (23) fixedly connected between the sliding rods (22) and the bottom plate (1), and a limiting plate (24) fixedly connected to the front ends of the two sliding rods (22).

4. The solder paste printer according to claim 1, wherein The material scraping assembly comprises a limiting groove (16) formed in the upper end of the bottom plate (1), a second reciprocating screw rod (17) rotatably arranged in the limiting groove (16), a second rotary motor (18) fixedly arranged on the inner side wall of the limiting groove (16) and used for driving the second reciprocating screw rod (17) to rotate, a second sliding block (19) slidably arranged on the second reciprocating screw rod (17), a connecting block (20) fixedly connected to the upper end of the second sliding block (19), and a scraper (21) fixedly connected to the rear end of the connecting block (20).

5. The solder paste printer according to claim 4, wherein The limiting groove (16) is square-shaped, and the second sliding block (19) is slidably connected to the limiting groove (16).

6. The solder paste printer according to claim 1, wherein A PCB board main body is arranged in the placing groove (2), and the size of the PCB board main body corresponds to that of the steel plate (3).

Images