Automatic tin replenishing device for tinning machine

Abstract

The utility model relates to tinning machine tin filling technology field discloses automatic tin filling device of tinning machine, include: tinning machine, the inside fixed mounting of tinning machine has the tin storage box, the inside setting of tin storage box has liquid tin, the outside installation of tin storage box has heating assembly, is used for heating liquid tin of tin storage box inside, the detachable installation of tin storage box top has the top cap, the installation of top cap has the supercharging unit, is used for controlling the pressure inside tin storage box. In the utility model, the inside pressure of tin storage box can be accurately controlled through the supercharging unit, which provides stable power for the delivery of liquid tin to the sealed cylinder. At the same time, the cooperation of multiple sealed cylinders and the tin filling mechanism realizes the step-by-step, synchronous storage and sequential separate delivery of liquid tin, effectively replacing manual tin filling, not only improving the automation degree of tinning operation, but also ensuring the accuracy and continuity of the tin filling amount of the tinning head, avoiding tinning quality defects caused by manual tin filling error.

Description

Technical Field

[0001] This utility model relates to the field of tin plating machine tin replenishment technology, and in particular to an automatic tin replenishment device for tin plating machines. Background Technology

[0002] Currently, tin plating machines are widely used in fields such as electronic component pins, surface treatment of hardware parts, and plating of cable connectors. Their core function is to improve the conductivity, corrosion resistance, and solderability of workpieces by forming a uniform tin layer on the surface of the workpiece. Among these, the continuous and precise tin supply from the tin plating head is the key to ensuring the quality of tin plating. The stability of the tin replenishment system directly determines the consistency of the plating thickness, the smoothness of the appearance, and the yield of the final product. However, the tin replenishment technology of existing tin plating machines still has many technical bottlenecks, making it difficult to meet the needs of efficient and high-precision production.

[0003] In most small and medium-sized production scenarios, tin replenishment in tin plating machines still relies on manual operation. Operators need to visually observe the tin consumption of the tin plating head and manually add solid tin blocks or pre-molten liquid tin to the tin plating area. However, the timing of manually judging when the tin plating head is "insufficient in tin" is subjectively delayed, and the amount added manually is easily affected by operating experience and fatigue, resulting in drastic fluctuations in the tin amount at the tin plating head. When there is too much tin, plating layer accumulation and drips are likely to occur, while when there is too little tin, quality defects such as missed plating, pinholes, and thinning of the plating layer will occur. Especially in the tin plating scenario of precision electronic components (such as chip pins), this error will directly lead to the scrapping of the workpiece.

[0004] Manual tin replenishment requires frequent interruptions to the tin plating process, significantly reducing the continuous operating efficiency of the production line. At the same time, operators need to be in close contact with high-temperature tin plating areas (liquid tin temperature is usually ≥232℃), posing a risk of burns, and long-term exposure to tin fumes may also cause occupational health problems.

[0005] Therefore, we propose an automatic tin replenishment device for tin plating machines to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to solve the problems existing in the prior art by proposing an automatic tin replenishment device for tin plating machines.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An automatic tin replenishment device for a tin plating machine includes: a tin plating machine; a tin storage tank fixedly installed inside the tin plating machine; liquid tin stored inside the tin storage tank; a heating component installed on the outside of the tin storage tank for heating the liquid tin inside the tin storage tank; a detachable top cover installed on the top of the tin storage tank; a pressure boosting component installed on the top cover for controlling the internal pressure of the tin storage tank; and a drive box connected to the bottom of the tin storage tank via a tin guide tube. Several sealing cylinders are installed on the inner wall of the drive box, and each sealing cylinder contains a [missing information - likely a component or material]. The tin replenishment mechanism is used to transport liquid tin inside the sealed cylinders. After the liquid tin stored inside the tin storage tank is introduced into the sealed cavities of multiple sealed cylinders synchronously or in stages through the tin guide tube, the liquid tin in each sealed cylinder can be transported to the tin plating head of the tin plating machine in a preset order by the driving action of the tin replenishment mechanism. An extrusion assembly is installed in the middle of the drive box. The installation position of the extrusion assembly is adapted to the arrangement position of several sealed cylinders on the inner wall of the drive box to ensure that the extrusion assembly can effectively cover each sealed cylinder.

[0009] Preferably, the solder replenishment mechanism includes a plurality of sealing cylinders fixedly installed on the inner wall of the drive box. Each sealing cylinder has a sealing plug slidably installed inside it. One end of the sealing plug is fixedly connected to a pressing rod. A spring is sleeved on the outside of the pressing rod. Both ends of the spring are fixedly installed to the sealing cylinder and the outside of the pressing rod, respectively.

[0010] Preferably, each of the solder guide tubes is connected to the solder storage box and the inner cavity of the sealing cylinder at both ends, and each of the solder guide tubes is equipped with a one-way valve.

[0011] Preferably, the extrusion assembly includes a motor fixedly installed on the side wall of the drive box, the motor drive output end being connected to a transmission shaft, and the other end of the transmission shaft being fixedly installed with a stop plate through the side wall of the drive box, the stop plate corresponding to a plurality of extrusion rod ports.

[0012] Preferably, the abutment plate and each extrusion rod port are provided with an arc-shaped opening. When the abutment plate rotates, the working surface of the abutment plate gradually approaches the arc-shaped opening area of ​​the extrusion rod during the rotation process until the two form a mutually fitting fit.

[0013] Preferably, the heating assembly includes a heating cover fixedly installed on the outside of the tin storage box, and heating rods arranged in a spring-like pattern are installed inside the heating cover, with the heating rods distributed on the outside of the tin storage box.

[0014] Preferably, the pressurization assembly includes a pressurization pump fixedly installed on one side of the top cover, and the pressurization end of the pressurization pump is connected to the tin storage box through a conduit.

[0015] Preferably, a maintenance cover is rotatably mounted on the side wall of the drive box via a hinge, and the maintenance cover is adapted to the port of the drive box.

[0016] Preferably, a plurality of the sealing cylinders are connected to the side walls of the tubes with solder outlet tubes, and a solder replenishing tube is connected to the other end of each of the tubes. Each tube is equipped with a one-way valve, and the inlet of the solder replenishing tube corresponds to the solder plating head of the tin plating machine.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention uses a heating component to continuously maintain the preset temperature of liquid tin in the storage tank, preventing the liquid tin from solidifying due to cooling and affecting the transport process. The pressurization component can precisely control the internal pressure of the storage tank, providing stable power for the transport of liquid tin to the sealed cylinders. At the same time, the cooperation of multiple sealed cylinders and the tin replenishment mechanism enables the step-by-step, synchronous storage and sequential individual transport of liquid tin, effectively replacing manual tin replenishment. This not only improves the automation level of the tin plating operation but also ensures the accuracy and continuity of the tin replenishment amount, avoiding tin plating quality defects caused by errors in manual tin replenishment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the automatic tin replenishment device for a tin plating machine proposed in this utility model;

[0020] Figure 2 This is a first-view structural schematic diagram of the automatic tin replenishment device for a tin plating machine proposed in this utility model.

[0021] Figure 3 This is a second-view structural schematic diagram of the automatic tin replenishment device for a tin plating machine proposed in this utility model.

[0022] Figure 4 This is a schematic diagram of the internal structure of the sealing cylinder of the automatic tin replenishment device for a tin plating machine proposed in this utility model;

[0023] Figure 5 This is a third-view structural diagram of the automatic tin replenishment device for a tin plating machine proposed in this utility model.

[0024] In the diagram: 1. Tin plating machine; 11. Tin storage box; 12. Heating cover; 13. Top cover; 14. Booster pump; 15. Tin guide tube; 2. Drive box; 21. Backing plate; 22. Sealing cylinder; 23. Sealing plug; 24. Extrusion rod; 25. Arc opening; 26. Spring; 3. Inspection cover; 31. Motor; 32. Tin outlet tube; 33. Tin replenishment tube. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figures 1-5The automatic tin replenishment device for a tin plating machine includes: a tin plating machine 1, a tin storage box 11 fixedly installed inside the tin plating machine 1, liquid tin inside the tin storage box 11, a heating component installed on the outside of the tin storage box 11 for heating the liquid tin inside the tin storage box 11, a top cover 13 detachably installed on the top of the tin storage box 11, screw holes are opened at the four corners of the top cover 13 and the top of the tin storage box 11, and bolts are threadedly connected to the corresponding two screw holes. A pressure boosting component is installed on the top cover 13 for controlling the internal pressure of the tin storage box 11.

[0027] The bottom of the tin storage box 11 is connected to the drive box 2 via the tin guide tube 15. The drive box 2 is fixedly installed on the inner wall of the tin storage box 11 by the bracket. Several sealing cylinders 22 are installed on the inner wall of the drive box 2. Each sealing cylinder 22 is equipped with a tin replenishing mechanism to realize the transportation of liquid tin in the sealing cylinder 22. When the liquid tin stored inside the tin storage box 11 is introduced into the sealed cavity of multiple sealing cylinders 22 synchronously or stepwise through the tin guide tube 15, the liquid tin in each sealing cylinder 22 can be transported to the tin plating head side of the tin plating machine 1 in a preset order by the driving action of the tin replenishing mechanism.

[0028] An extrusion assembly is installed in the middle of the drive box 2. The installation position of the extrusion assembly is adapted to the arrangement position of several sealing cylinders 22 on the inner wall of the drive box 2, so as to ensure that the extrusion assembly can effectively cover each sealing cylinder 22.

[0029] After the automatic tin replenishment device of the tin plating machine 1 is started, the heating component on the outside of the tin storage box 11 first heats the liquid tin in the box to maintain the liquid tin at the preset melting temperature and prevent solidification. Then, the pressurizing component on the top cover 13 works to apply a preset pressure to the inside of the tin storage box 11. Under the action of pressure, the liquid tin in the tin storage box 11 is transported through the bottom tin guide tube 15 to several sealed cylinders 22 in the drive box 2. When the sealed cylinders 22 have stored enough liquid tin, the tin replenishment mechanism in each sealed cylinder 22 is started in sequence according to the preset program, and the liquid tin in a single sealed cylinder 22 is directed to the tin plating head of the tin plating machine 1 to continuously provide tin plating raw materials for the tin plating head and complete the automatic tin replenishment cycle.

[0030] Furthermore, the solder replenishment mechanism includes several sealing cylinders 22 fixedly installed on the inner wall of the drive box 2. Each sealing cylinder 22 has a sealing plug 23 slidably installed inside it. One end of the sealing plug 23 is fixedly connected to a pressing rod 24. One end of the sealing cylinder 22 has a piston hole, which is movably connected to the pressing rod 24. A spring 26 is sleeved on the outside of the pressing rod 24, and both ends of the spring 26 are fixedly installed on the outside of the sealing cylinder 22 and the pressing rod 24, respectively.

[0031] When the solder replenishment mechanism is working, the sealing cylinder 22 and the internal sealing plug 23 form a sealed cavity to ensure that the liquid solder does not leak or come into contact with air during storage. When the extrusion assembly applies force to the extrusion rod 24, the extrusion rod 24 pushes the sealing plug 23 to slide along the inner wall of the sealing cylinder 22. During the movement of the sealing plug 23, the space inside the sealing cylinder 22 is compressed, pushing the liquid solder in the cavity toward the solder outlet direction. When the force of the extrusion assembly disappears, the spring 26 sleeved on the outside of the extrusion rod 24 recovers due to its own elastic deformation, generating a reverse pulling force (or pushing force) to drive the extrusion rod 24 and the sealing plug 23 back to the initial position, so that the negative pressure or empty space is re-formed inside the sealing cylinder 22, preparing for the next reception of liquid solder from the solder storage box 11, realizing the automatic reset and cyclic operation of the solder replenishment mechanism.

[0032] Furthermore, each solder tube 15 is connected to the inner cavity of the solder storage box 11 and the sealing cylinder 22 at both ends, and each solder tube 15 is equipped with a one-way valve. The flow direction of the one-way valve on the solder tube 15 is from the solder storage box 11 to the sealing cylinder 22.

[0033] When the solder storage tank 11 supplies liquid solder to the sealing cylinder 22, the pressure inside the solder storage tank 11 is greater than the pressure inside the sealing cylinder 22, pushing the liquid solder to flow along the solder guide tube 15. At this time, the one-way valve on the solder guide tube 15 opens due to the positive pressure, allowing the liquid solder to flow smoothly from the solder storage tank 11 into the sealing cylinder 22. When the solder storage tank 11 stops supplying solder or the pressure inside the sealing cylinder 22 increases due to other factors, the one-way valve automatically closes under the action of the reverse pressure, strictly blocking the path of liquid solder flowing back from the sealing cylinder 22 to the solder storage tank 11. At the same time, the design of one solder guide tube 15 corresponding to one sealing cylinder 22 allows for precise control of the amount of liquid solder introduced into each sealing cylinder 22 by independently controlling the opening and closing of each solder guide tube 15, ensuring that the amount of liquid solder stored in each sealing cylinder 22 is consistent.

[0034] Furthermore, the extrusion assembly includes a motor 31 fixedly mounted on the side wall of the drive box 2. The drive output end of the motor 31 is connected to the drive shaft, and the other end of the drive shaft is fixedly mounted with a stop plate 21 through the side wall of the drive box 2. The stop plate 21 corresponds to the ports of multiple extrusion rods 24.

[0035] After the extrusion assembly is started, the motor 31 outputs power and transmits it to the drive shaft. The drive shaft drives the abutment 21, which is fixedly connected to it, to rotate around a preset axis. Since the abutment 21 corresponds one-to-one with the ports of multiple extrusion rods 24, the abutment 21 will contact each extrusion rod 24 port in turn and apply force during the rotation. By controlling the speed and rotation angle of the motor 31, the rotation speed and dwell time of the abutment 21 can be precisely adjusted, thereby controlling the amplitude and frequency of the extrusion rods 24 being pushed, so as to achieve orderly control of the amount and rhythm of liquid tin conveyed in each sealed cylinder 22, and ensure that the tin replenishment action is stable and synchronous.

[0036] Furthermore, both the abutment plate 21 and the port of each extrusion rod 24 are provided with an arc-shaped opening 25. When the abutment plate 21 rotates, the working surface of the abutment plate 21 gradually approaches the arc-shaped opening 25 area of ​​the extrusion rod 24 during the rotation process until the two form a mutually fitting fit.

[0037] When the motor 31 drives the transmission shaft to rotate the abutment 21, the arc 25 on the abutment 21 gradually approaches the arc 25 at the end of the extrusion rod 24 as the abutment 21 rotates. Since the curvature of the two arc 25s is matched, as the abutment 21 continues to rotate, the contact surfaces of the two arc 25s gradually come together, forming a stable contact fit. After the fit, the rotational force of the abutment 21 is evenly transmitted to the extrusion rod 24 through the contact surface of the arc 25, pushing the extrusion rod 24 to move in a preset direction. As the abutment 21 continues to rotate, the two arc 25s slide relative to each other along the smooth contour until the abutment 21 disengages from the extrusion rod 24, completing the driving of a single extrusion rod 24. Then the abutment 21 continues to rotate, repeating the above-mentioned fitting and driving process with the arc 25 of the next extrusion rod 24.

[0038] Furthermore, the heating assembly includes a heating cover 12 fixedly installed on the outside of the tin storage box 11, and heating rods arranged in a spring-like manner installed inside the heating cover 12, with the heating rods distributed on the outside of the tin storage box 11.

[0039] When the heating component is working, the heating cover 12 surrounds the outside of the tin storage box 11 to form a closed heating space. The heating rods inside the heating cover 12, which are distributed in a spring shape, generate heat after being energized. The spring-shaped structure ensures that the heating rods maintain a large area and uniform contact with the outer wall of the tin storage box 11. The heat is conducted through the wall of the tin storage box 11 to the liquid tin inside the box, thereby achieving uniform heating of the liquid tin.

[0040] Furthermore, the booster assembly includes a booster pump 14 fixedly installed on one side of the top cover 13, and the booster end of the booster pump 14 is connected to the tin storage box 11 via a conduit.

[0041] According to the requirements of the tin plating operation for replenishment speed, the booster pump 14 in the booster assembly is connected to the tin storage tank 11 through a conduit. When it is necessary to speed up the liquid tin delivery speed, the booster pump 14 increases the output pressure and injects more compressed gas into the tin storage tank 11, increasing the internal pressure of the tin storage tank 11. Under the action of a greater pressure difference, the liquid tin quickly enters the sealing cylinder 22 through the tin guide tube 15.

[0042] Furthermore, a maintenance cover 3 is mounted on the side wall of the drive box 2 via a hinge, and the maintenance cover 3 is adapted to the port of the drive box 2.

[0043] When the drive box 2 is working normally, the inspection cover 3 closes through the adapter structure with the port of the drive box 2 to ensure that the inside of the drive box 2 is sealed and prevent dust and impurities from entering and affecting the operation of the internal components. When the sealing cylinder 22, the soldering mechanism or the extrusion assembly inside the drive box 2 malfunctions and needs to be repaired, the operator can open the inspection cover 3 from the port of the drive box 2 by flipping the hinge on the side wall of the drive box 2, directly exposing the internal components of the drive box 2, so as to facilitate the inspection, repair or replacement of the faulty components.

[0044] Furthermore, multiple sealing cylinders 22 are connected to the side walls of the solder outlet tubes 32, and the other end of the multiple solder outlet tubes 32 is connected to the solder replenishment tubes 33. Each solder outlet tube 32 is equipped with a one-way valve. The port of the solder replenishment tube 33 corresponds to the solder plating head of the tin plating machine 1. The flow direction of the one-way valve on the solder outlet tube 32 is from the sealing cylinder 22 to the solder replenishment tube 33.

[0045] When the liquid solder inside the sealing cylinder 22 is pushed by the extrusion assembly, the liquid solder flows out through the solder outlet pipe 32 on the side wall of the sealing cylinder 22. The one-way valve on the solder outlet pipe 32 opens due to the forward flow pressure of the liquid solder, allowing the liquid solder to enter the solder replenishment pipe 33. The solder outlet pipes 32 of multiple sealing cylinders 22 are all connected to the solder replenishment pipe 33, so that the liquid solder flowing out of each sealing cylinder 22 is collected in the solder replenishment pipe 33. Then the solder replenishment pipe 33 delivers the liquid solder in a direction to the corresponding solder plating head, continuously supplying solder to the solder plating head. When the pressure on one side of the solder plating head increases, the one-way valve on the solder outlet pipe 32 automatically closes due to the reverse pressure, preventing the liquid solder in the solder replenishment pipe 33 from flowing back into the sealing cylinder 22, ensuring that the liquid solder only flows towards the solder plating head. At the same time, the centralized layout of the solder replenishment pipe 33 reduces pipe crossings and avoids pipe interference.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic tin replenishment device for a tin plating machine, characterized in that, include: A tin storage box (11) is provided with liquid tin inside. A heating component is installed on the outside of the tin storage box (11) for heating the liquid tin inside the tin storage box (11). A top cover (13) is detachably installed on the top of the tin storage box (11). A pressurizing component is installed on the top cover (13) for controlling the internal pressure of the tin storage box (11). The bottom of the tin storage box (11) is connected to the drive box (2) through the tin guide tube (15). The inner wall of the drive box (2) is equipped with several sealing cylinders (22). Each sealing cylinder (22) is equipped with a tin replenishment mechanism for conveying liquid tin in the sealing cylinder (22). An extrusion assembly is installed in the middle of the drive box (2), and the installation position of the extrusion assembly is adapted to the arrangement position of several sealing cylinders (22) on the inner wall of the drive box (2).

2. The automatic tin replenishment device for a tin plating machine according to claim 1, characterized in that, The soldering mechanism includes several sealing cylinders (22) fixedly installed on the inner wall of the drive box (2). Each sealing cylinder (22) has a sealing plug (23) slidably installed inside it. One end of the sealing plug (23) is fixedly connected to a pressing rod (24). A spring (26) is sleeved on the outside of the pressing rod (24). The two ends of the spring (26) are fixedly installed to the sealing cylinder (22) and the outside of the pressing rod (24), respectively.

3. The automatic tin replenishment device for a tin plating machine according to claim 1, characterized in that, Each of the solder tubes (15) is connected to the solder storage box (11) and the inner cavity of the sealing cylinder (22) at both ends, and each of the solder tubes (15) is equipped with a one-way valve.

4. The automatic tin replenishment device for a tin plating machine according to claim 2, characterized in that, The extrusion assembly includes a motor (31) fixedly installed on the side wall of the drive box (2). The output end of the motor (31) is connected to the transmission shaft, and the other end of the transmission shaft is fixedly installed with a stop plate (21) through the side wall of the drive box (2). The stop plate (21) corresponds to the ports of multiple extrusion rods (24).

5. The automatic tin replenishment device for a tin plating machine according to claim 4, characterized in that, The abutment (21) and each extrusion rod (24) have an arc-shaped opening (25) at their ends.

6. The automatic tin replenishment device for a tin plating machine according to claim 1, characterized in that, The heating assembly includes a heating cover (12) fixedly installed on the outside of the tin storage box (11), and heating rods arranged in a spring shape are installed inside the heating cover (12), which are distributed on the outside of the tin storage box (11).

7. The automatic tin replenishment device for a tin plating machine according to claim 1, characterized in that, The pressurization assembly includes a pressurization pump (14) fixedly installed on one side of the top cover (13), and the pressurization end of the pressurization pump (14) is connected to the tin storage box (11) through a conduit.

8. The automatic tin replenishment device for a tin plating machine according to claim 1, characterized in that, The side wall of the drive box (2) is fitted with a maintenance cover (3) via a hinge, and the maintenance cover (3) is adapted to the port of the drive box (2).

9. The automatic tin replenishment device for a tin plating machine according to claim 1, characterized in that, A plurality of sealing cylinders (22) are connected to the side walls of the tubes with solder outlet tubes (32), and a solder replenishing tube (33) is connected to the other end of the tubes with solder outlet tubes (32). Each tube with solder outlet tube (32) is equipped with a one-way valve, and the port of the solder replenishing tube (33) corresponds to the solder plating head of the solder plating machine (1).

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