Dispensing device for ultra-fine powder solder paste

Abstract

This utility model discloses a dispensing device for ultra-fine solder paste, specifically relating to the field of solder paste dispensing technology. It includes a fixed frame, on which a material container is fixed via a bracket. A drive motor is mounted on the top of the material container, and a scraper is connected to the output end of the drive motor. The scraper is in contact with the inner wall of the material container. An extrusion tube is fixed on the fixed frame via a bracket, and a positioning sleeve is fixed to the top of the extrusion tube. A solenoid valve is installed on the front side of the extrusion tube, and the solenoid valve is connected to the material container via a pneumatic pipeline. A piston is slidably connected inside the extrusion tube, and a drive mechanism is mounted on the piston to drive it up and down. A mounting hole is opened at the bottom of the piston, and a pressure-sensitive switch is installed inside the mounting hole. A sliding plate is slidably connected to the mounting hole in a sealed manner. This utility model, through innovative design, achieves intelligent control of the amount of ultra-fine solder paste dispensed, effectively solving the pain point of traditional devices' difficulty in accurately controlling the dispensing amount, and enabling control of solder paste dispensing error.

Description

Technical Field

[0001] This utility model relates to the field of solder paste packaging technology, and more specifically, to a packaging device for ultra-fine solder paste. Background Technology

[0002] The ultra-fine solder paste dispensing device is used to accurately dispense micron-sized solder paste, ensuring high precision, no splashing, and stable dispensing. It is suitable for precision electronic packaging and features constant temperature, anti-oxidation, and automatic cleaning functions. It meets the stringent requirements of SMT processes for ultra-fine solder paste, improving soldering quality and production efficiency.

[0003] While existing ultra-fine solder paste dispensing devices have the function of adjusting the extrusion tube volume, they have obvious defects in actual use. When the operator adjusts the extrusion tube volume, due to the lack of a precise metering and control system, it is difficult to accurately control the amount of solder paste injected into the tube. This design defect often leads to the amount of solder paste injected exceeding the actual needs, resulting in pressure imbalance during extrusion and causing solder paste backflow. This not only wastes materials but also contaminates the internal structure of the equipment and affects the subsequent dispensing quality.

[0004] In summary, to improve the dispensing accuracy and operational efficiency of ultra-fine solder paste, it is necessary to address the problem of difficulty in accurately controlling the amount of solder paste injected after volume adjustment in existing equipment. This would enable the equipment to operate stably, avoid material waste and equipment contamination caused by solder paste reflow, thereby improving dispensing quality, reducing maintenance costs, and ensuring a smooth and efficient production process. Utility Model Content

[0005] The problem to be solved by the ultra-fine solder paste dispensing device provided by this utility model is that although the existing ultra-fine solder paste dispensing devices have the function of adjusting the volume of the extrusion tube during use, it is difficult to control the amount of solder paste injected into the extrusion tube after adjusting the volume, which easily leads to the problem of solder paste backflow.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dispensing device for ultra-fine solder paste, including a fixed frame, a material barrel fixed on the fixed frame by a bracket, a drive motor installed on the top of the material barrel, a scraper connected to the output end of the drive motor, the scraper fitting against the inner wall of the material barrel, an extrusion tube fixed on the fixed frame by a bracket, a positioning sleeve fixed on the top of the extrusion tube, a solenoid valve installed on the front side of the extrusion tube, the solenoid valve connected to the material barrel by a pneumatic pipeline, a piston slidably connected inside the extrusion tube, a drive mechanism installed on the piston, the drive mechanism driving the piston to move up and down, a mounting hole opened at the bottom of the piston, a pressure-sensitive switch installed inside the mounting hole, a sliding plate slidably connected inside the mounting hole, multiple springs installed on the top of the sliding plate, the top of the springs fixedly connected to the mounting hole, a pin fixed on the top of the sliding plate, and a shielding mechanism installed at the bottom of the extrusion tube.

[0007] In a preferred embodiment, the drive mechanism includes a lifting assembly and a guide assembly. The lifting assembly is used to drive the piston to move up and down, and the guide assembly is used to guide and limit the piston.

[0008] In a preferred embodiment, the lifting assembly includes a slide rod fixed to the top of the piston, the slide rod being slidably connected to the positioning sleeve, the slide rod having a toothed groove on its outer side, a fixing plate being fixed inside the positioning sleeve, a servo motor being mounted on the fixing plate, a gear being mounted on the output end of the servo motor, the servo motor being used to drive the gear to rotate, the gear meshing with the toothed groove.

[0009] In a preferred embodiment, the guide assembly includes two guide rods fixed to the piston, the guide rods being slidably connected to the positioning sleeve, and a limit piece being fixed to the top of the guide rods.

[0010] In a preferred embodiment, the shielding mechanism includes a sliding component and a limiting component, the sliding component being used to shield the bottom outlet of the extrusion tube, and the limiting component being used to limit the sliding component.

[0011] In a preferred embodiment, the sliding assembly includes a fixed seat installed at the bottom of the extrusion tube. The bottom of the fixed seat has two grooves, and a sliding plate is slidably connected between the two grooves by a slider. Both the sliding plate and the fixed seat have through holes.

[0012] In a preferred embodiment, the limiting component includes blocks fixedly connected to the left and right sides of the fixed base, the blocks having protrusions that insert into the sliding grooves.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention achieves intelligent control of the amount of ultra-fine solder paste injected through innovative design. When the solder paste is injected into the extrusion tube and fills the tube, the pressure will push the slider upward. When it reaches the preset position, the pressure-sensitive switch is automatically triggered to cut off the injection. This technical solution effectively solves the pain point of the traditional device's difficulty in accurately controlling the injection amount. It can control the error of the solder paste injection amount, avoid the solder paste backflow caused by the injection channel, and significantly improve the packaging accuracy and consistency, making the production process more standardized and intelligent. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the extrusion tube of this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the drive mechanism of this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the shielding mechanism of this utility model.

[0019] Figure 5 This is a schematic diagram of the piston's three-dimensional half-section structure according to the present invention.

[0020] The attached diagram is labeled as follows: 1. Fixing frame; 2. Material bucket; 3. Drive motor; 4. Extrusion tube; 5. Positioning sleeve; 6. Solenoid valve; 7. Piston; 81. Slide rod; 82. Gear groove; 83. Fixing plate; 84. Servo motor; 85. Gear; 86. Guide rod; 87. Limiting plate; 9. Pressure-sensitive switch; 10. Spring; 11. Slide plate; 12. Ejector pin; 131. Fixing base; 132. Slide groove; 133. Slide plate; 134. Through hole; 135. Stop block. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0022] Refer to the instruction manual appendix Figures 1 to 5 A dispensing device for ultra-fine solder paste includes a fixed frame 1, on which a material tank 2 is fixed by a bracket. A drive motor 3 is installed on the top of the material tank 2, and a scraper is connected to the output end of the drive motor 3. The scraper is in contact with the inner wall of the material tank 2. An extrusion tube 4 is fixed on the fixed frame 1 by a bracket. A positioning sleeve 5 is fixed on the top of the extrusion tube 4. A solenoid valve 6 is installed on the front side of the extrusion tube 4. The solenoid valve 6 is connected to the material tank 2 by a pneumatic pipeline. A piston 7 is slidably connected inside the extrusion tube 4. A drive mechanism is installed on the piston 7 to drive the piston 7 to move up and down. A mounting hole is opened at the bottom of the piston 7. A pressure-sensitive switch 9 is installed inside the mounting hole. A sliding plate 11 is slidably connected inside the mounting hole. Multiple springs 10 are installed on the top of the sliding plate 11. The top of the springs 10 is fixedly connected to the mounting hole. A ejector pin 12 is fixed on the top of the sliding plate 11. A shielding mechanism is installed at the bottom of the extrusion tube 4.

[0023] It should be noted that the drive motor 3 is used to drive the scraper to rotate. The rotation of the scraper can agitate the solder paste inside the material barrel 2 to prevent caking. The solder paste inside the material barrel 2 is injected into the extrusion tube through the cooperation of the air pressure pipeline and the solenoid valve 6. During dispensing, the position of the piston 7 is adjusted and the solder paste is injected. When the solder paste fills the inside of the extrusion tube, it will exert pressure on the slide plate 11, causing the slide plate 11 to drive the ejector pin 12 to move upward, thereby triggering the pressure-sensitive switch 9, controlling the solenoid valve 6 and the injection module to close, ensuring that the amount of solder paste in the extrusion tube can be accurately controlled, avoiding the problem of excessive injection, which would cause excessive pressure inside the extrusion tube and backflow.

[0024] Refer to the instruction manual appendix Figure 2 and Figure 3 The drive mechanism includes a lifting assembly and a guide assembly. The lifting assembly is used to drive the piston 7 to rise and fall, and the guide assembly is used to guide and limit the piston 7.

[0025] It should be noted that when the lifting assembly is in operation, the piston 7 is driven to slide along the inner wall of the extrusion tube 4 by the limiting of the guide assembly, thereby adjusting the internal volume of the extrusion tube 4.

[0026] Refer to the instruction manual appendix Figure 2 and Figure 3 The lifting assembly includes a slide rod 81 fixed to the top of the piston 7. The slide rod 81 is slidably connected to the positioning sleeve 5. A toothed groove 82 is provided on the outer side of the slide rod 81. A fixing plate 83 is fixed inside the positioning sleeve 5. A servo motor 84 is installed on the fixing plate 83. A gear 85 is installed at the output end of the servo motor 84. The servo motor 84 is used to drive the gear 85 to rotate. The gear 85 meshes with the toothed groove 82.

[0027] It should be noted that when the servo motor 84 is in operation, it drives the gear 85 to rotate. The gear 85 meshes with the tooth groove 82 to drive the slide rod 81 to move up and down, thereby driving the piston 7 to move. After the filling is completed, the servo motor 84 is restarted to drive the slide rod 81 to move down continuously, thereby extruding the solder paste from the extrusion tube 4.

[0028] Refer to the instruction manual appendix Figure 2 and Figure 3 The guide assembly includes two guide rods 86 fixed on the piston 7. The guide rods 86 are slidably connected to the positioning sleeve 5. A limit piece 87 is fixed to the top of the guide rods 86.

[0029] It should be noted that when the piston 7 moves, it drives the guide rod 86 to slide along the hole of the positioning sleeve 5, thereby positioning the piston 7 and improving its lifting stability.

[0030] Refer to the instruction manual appendix Figure 2 and Figure 4The shielding mechanism includes a sliding component and a limiting component. The sliding component is used to shield the bottom outlet of the extrusion tube 4, and the limiting component is used to limit the sliding component.

[0031] It should be noted that when material is injected into the extrusion tube 4, the sliding component can cover the bottom of the extrusion tube 4.

[0032] Refer to the instruction manual appendix Figure 2 and Figure 4 The sliding assembly includes a fixed seat 131 installed at the bottom of the extrusion tube 4. The bottom of the fixed seat 131 has two sliding grooves 132. A sliding plate 133 is slidably connected between the two sliding grooves 132 by a slider. Both the sliding plate 133 and the fixed seat 131 have through holes 134.

[0033] It should be noted that by sliding the slide plate 133, the through hole 134 on the slide plate 133 and the through hole 134 on the fixing base 131 can be aligned or offset.

[0034] Refer to the instruction manual appendix Figure 4 The limiting component includes a stop block 135 fixedly connected to the left and right sides of the fixed base 131. The stop block 135 has a protrusion, and the protrusion of the stop block 135 is inserted into the slide groove 132.

[0035] It should be noted that the setting of the stop 135 can limit the distance that the slide plate 133 can move left and right. When it moves to fit with the right stop 135, the two through holes 134 are just offset. When it moves to fit with the left stop 135, the two through holes 134 are completely overlapped.

[0036] Working principle: The drive motor 3 rotates the scraper within the material barrel 2, continuously agitating the solder paste to prevent caking. During dispensing, the servo motor 84 drives the gear 85 to rotate. Through meshing with the outer tooth groove 82 of the slide rod 81, the slide rod 81 and the connected piston 7 move to a predetermined height within the extrusion tube 4, opening the solenoid valve 6. The solder paste in the material barrel 2 is then forced into the extrusion tube 4 under air pressure. When the solder paste fills the extrusion tube 4 and contacts the slide plate 11, the slide plate 11 is pressured, causing the ejector pin 12 to move upwards, compressing the spring 10 and triggering the pressure-sensitive switch 9. The pressure-sensitive switch 9 sends a signal to close the solenoid valve 6 and... The injection module stops injection to ensure accurate injection volume and avoid backflow due to excessive pressure. Subsequently, the servo motor 84 drives the slide bar 81 to move the piston 7 continuously downward. At the same time, the sliding plate 133 at the bottom of the sliding base 131 is aligned with the through hole 134 of the base 131. The piston 7 moves downward to extrude the precisely measured solder paste through the aligned through hole 134 for packaging. After packaging, the sliding plate 133 is reversed to offset the through hole 134 of the base 131, blocking the bottom outlet of the extrusion tube 4. The guide rod 86 slides along the positioning sleeve 5 during the movement of the piston 7 to ensure stable lifting and lowering of the piston 7.

[0037] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

[0038] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A dispensing device for ultrafine solder paste, characterized in that: The system includes a fixed frame (1), on which a material bucket (2) is fixed by a bracket. A drive motor (3) is installed on the top of the material bucket (2). A scraper is connected to the output end of the drive motor (3). The scraper is in contact with the inner wall of the material bucket (2). An extrusion tube (4) is fixed on the fixed frame (1) by a bracket. A positioning sleeve (5) is fixed on the top of the extrusion tube (4). A solenoid valve (6) is installed on the front side of the extrusion tube (4). The solenoid valve (6) is connected to the material bucket (2) through a pneumatic pipeline. The interior of the extrusion tube (4) A piston (7) is slidably connected. A drive mechanism is provided on the piston (7). The drive mechanism is used to drive the piston (7) to move up and down. An installation hole is provided at the bottom of the piston (7). A pressure-sensitive switch (9) is provided inside the installation hole. A sliding plate (11) is slidably connected inside the installation hole. Multiple springs (10) are installed on the top of the sliding plate (11). The top of the springs (10) is fixedly connected to the installation hole. A pin (12) is fixed on the top of the sliding plate (11). A shielding mechanism is provided at the bottom of the extrusion tube (4).

2. The dispensing device for ultrafine solder paste according to claim 1, characterized in that: The drive mechanism includes a lifting assembly and a guide assembly. The lifting assembly is used to drive the piston (7) to rise and fall, and the guide assembly is used to guide and limit the piston (7).

3. The dispensing device for ultrafine solder paste according to claim 2, characterized in that: The lifting assembly includes a slide rod (81) fixed to the top of the piston (7). The slide rod (81) is slidably connected to the positioning sleeve (5). The slide rod (81) has a toothed groove (82) on its outer side. The positioning sleeve (5) has a fixed plate (83) fixed inside. A servo motor (84) is installed on the fixed plate (83). A gear (85) is installed at the output end of the servo motor (84). The servo motor (84) is used to drive the gear (85) to rotate. The gear (85) meshes with the toothed groove (82).

4. The dispensing device for ultrafine solder paste according to claim 3, characterized in that: The guide assembly includes two guide rods (86) fixed on the piston (7), the guide rods (86) are slidably connected to the positioning sleeve (5), and a limit piece (87) is fixed to the top of the guide rods (86).

5. The dispensing device for ultrafine solder paste according to claim 1, characterized in that: The shielding mechanism includes a sliding component and a limiting component. The sliding component is used to shield the bottom outlet of the extrusion tube (4), and the limiting component is used to limit the sliding component.

6. The dispensing device for ultrafine solder paste according to claim 5, characterized in that: The sliding assembly includes a fixed seat (131) installed at the bottom of the extrusion tube (4). The bottom of the fixed seat (131) has two sliding grooves (132). A sliding plate (133) is slidably connected between the two sliding grooves (132) by a slider. Both the sliding plate (133) and the fixed seat (131) have through holes (134).

7. The dispensing device for ultrafine solder paste according to claim 6, characterized in that: The limiting component includes a stop block (135) fixedly connected to the left and right sides of the fixed base (131). The stop block (135) has a protrusion, and the protrusion of the stop block (135) is inserted into the slide groove (132).

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