Liquid level control device for preventing bracket tin coating from yellowing

Abstract

The utility model belongs to the technical field of manufacturing and application of electronic and electrical component products, and particularly relates to a liquid level control device for preventing a bracket tin coating from yellowing, which comprises a tin plating solution overflow collecting tank, a liquid level control device and a liquid level control device, a tinning sub-tank is placed on the inner side of the tinning liquid overflow collecting tank, and the tinning sub-tank is filled with tin liquid; liquid blocking structures are arranged on the left side and the right side of the tinning sub-tank correspondingly, and a liquid level sensor is installed in the tinning sub-tank and electrically connected with a liquid level control box. The bottom end of the tinning liquid overflow collecting tank communicates with a tinning mother tank, the bottom of the tinning mother tank communicates with the liquid inlet end of a tinning liquid water pump, the liquid outlet end of the tinning liquid water pump communicates with the bottom of the tinning son tank, and the tinning liquid water pump is electrically connected with the liquid level control box. By means of the structure, the liquid level control device for preventing the bracket tin coating from yellowing can stabilize the liquid level of tin plating liquid, reduce the possibility of yellowing of the tin coating and improve the product quality.

Description

Technical Field

[0001] The utility model belongs to the technical field of manufacturing and application of electronic and electrical component products, and in particular relates to a liquid level control device for preventing a tin-plated layer of a bracket from turning yellow. Background Art

[0002] At present, after the LED bracket is silver-plated, it is cut into 20-bit or 30-bit conjoined sheets and handed over to the lamp bead packaging factory to produce conjoined lamp beads. After the packaging is completed, it is handed over to the electroplating factory to tin the bracket pins and connecting rods to improve the solderability of the lamp beads. The existing problem is that the conjoined lamp beads are transferred from the packaging factory to the electroplating factory, and then transferred back to the packaging factory for pin cutting and testing after tinning. If abnormalities are found, the timeliness is delayed, and the delivery cycle of the lamp beads is long.

[0003] Our company has researched and developed a continuous electroplating process for silver and tin plating on the same production line. All electroplating processes are completed at one time before the bracket is packaged. After the packaging factory completes the packaging of the lamp beads, it directly conducts pin cutting inspection, which saves the tin plating process and shortens the production cycle of the lamp beads. However, a new problem has also emerged. The tin plating layer of the bracket turns yellow and discolored during packaging, resulting in inconsistent appearance color of the lamp bead pins, affecting the quality of the lamp beads.

[0004] Before the LED lamp beads are packaged, the tin water level line around the connecting rod on the bracket is prone to yellowing and discoloration. Through experiments, it was found that the main reason is that the liquid level of the tin plating solution fluctuates. The distance between the tin plating layer water level line of the LED silver-tin integrated bracket and the lamp bead rubber cap is unstable. When the water level line is high, the trace gas generated when packaging the lamp bead rubber cap causes the tin plating layer to turn yellow. Utility Model Content

[0005] The purpose of the utility model is to provide a liquid level control device for preventing the tin-plated layer of the bracket from turning yellow, so as to solve the above-mentioned problem. By adding a tin-plating tank solution water level control device and adjusting the flow rate of the sub-tank supplying the medicine, the fluctuation of the water level of the tin-plating solution can be finally controlled, so as to prevent the water level line from being too close to the lower edge of the rubber cap and prevent the pin line from turning yellow when encapsulating the lamp beads.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] A liquid level control device for preventing a tin-plated layer of a bracket from turning yellow comprises: a tin-plating liquid overflow collecting tank, the tin-plating liquid overflow collecting tank being used to collect overflowed tin liquid;

[0008] A tinning sub-trough is placed inside the tinning liquid overflow collecting tank, and the tinning sub-trough is filled with the tin liquid;

[0009] The left and right sides of the tinning sub-trough are respectively provided with liquid blocking structures, and a liquid level sensor is installed in the tinning sub-trough, and the liquid level sensor is electrically connected to a liquid level control box;

[0010] The bottom end of the tin plating liquid overflow collection tank is connected to the tin plating main tank, the bottom of the tin plating main tank is connected to the liquid inlet end of the tin plating liquid water pump, the liquid outlet end of the tin plating liquid water pump is connected to the bottom of the tin plating sub-tank, and the tin plating liquid water pump is electrically connected to the liquid level control box.

[0011] Preferably, the liquid retaining structure comprises a mounting groove, two rubber water retaining sheets are arranged inside the mounting groove, and a gap is left between the two rubber water retaining sheets.

[0012] Preferably, a slot is provided on the inner side of the installation groove, and an insert strip is provided on a side of the rubber water retaining sheet close to the installation groove, the insert strip matches the slot, and the insert strip is frictionally connected to the inner side of the slot.

[0013] Preferably, the tin-plating mother tank is connected to the tin-plating liquid water pump through a first connecting pipe.

[0014] Preferably, the tin plating liquid water pump is connected to the tin plating sub-tank through a second connecting pipe.

[0015] Preferably, the bottom end of the tin plating solution overflow collection tank is connected to the tin plating mother tank through a third connecting pipe.

[0016] Preferably, grooves are provided on the left and right sides of the tin plating solution overflow collection tank.

[0017] Compared with the prior art, the utility model has the following advantages and technical effects:

[0018] In the utility model, by setting a liquid level control box and a liquid level sensor, the liquid level change in the tin plating sub-tank can be detected in real time. When the liquid level changes, the tin plating liquid water pump is used to fill or drain the liquid therein, thereby ensuring the height stability of the liquid level, thereby reducing the possibility of yellowing of the tin plating layer and improving the quality of the product.

[0019] The device utilizes these structures to realize a liquid level control device that can stabilize the liquid level of the tin plating liquid, reduce the possibility of the tin plating layer turning yellow, and improve the quality of the product to prevent the tin plating layer of the bracket from turning yellow. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor:

[0021] Figure 1 The overall schematic diagram of the tinning sub-trough is taken out for this device;

[0022] Figure 2Schematic diagram of the bracket and its water level line.

[0023] Among them, 1. tinning mother tank; 2. tinning liquid overflow collection tank; 3. tinning sub-tank; 4. tinning liquid water pump; 5. liquid level control box; 6. first connecting pipe; 7. second connecting pipe; 8. wire; 9. third connecting pipe; 10. liquid level sensor; 11. rubber water retaining sheet; 12. water level line; 13. bracket; 201. slot; 301. installation slot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Reference Figure 1 to Figure 2 The utility model discloses a liquid level control device for preventing the tin-plated layer of a bracket from yellowing, comprising: a tin-plating liquid overflow collecting tank 2, the tin-plating liquid overflow collecting tank 2 is used to collect the overflowed tin liquid;

[0027] A tinning sub-trough 3 is placed inside the tinning liquid overflow collecting tank 2, and the tinning sub-trough 3 is filled with tin liquid;

[0028] The left and right sides of the tinning sub-tank 3 are respectively provided with liquid retaining structures, and a liquid level sensor 10 is installed in the tinning sub-tank 3, and the liquid level sensor 10 is electrically connected to the liquid level control box 5;

[0029] The bottom end of the tin plating liquid overflow collection tank 2 is connected to the tin plating main tank 1, the bottom of the tin plating main tank 1 is connected to the liquid inlet end of the tin plating liquid water pump 4, the liquid outlet end of the tin plating liquid water pump 4 is connected to the bottom of the tin plating sub-tank 3, and the tin plating liquid water pump 4 is electrically connected to the liquid level control box 5.

[0030] By setting up a liquid level control box 5 and a liquid level sensor 10, the device can detect the liquid level changes in the tin plating sub-tank 3 in real time. When the liquid level changes, the tin plating liquid water pump 4 is used to fill or drain the liquid therein, thereby ensuring the height stability of the liquid level, thereby reducing the possibility of yellowing of the tin plating layer and improving the quality of the product.

[0031] The device utilizes these structures to realize a liquid level control device that can stabilize the liquid level of the tin plating liquid, reduce the possibility of the tin plating layer turning yellow, and improve the quality of the product to prevent the tin plating layer of the bracket from turning yellow.

[0032] According to a further optimized solution, the liquid retaining structure comprises a mounting groove 301 , two rubber water retaining sheets 11 are arranged inside the mounting groove 301 , and a gap is left between the two rubber water retaining sheets 11 .

[0033] According to a further optimization scheme, a slot is provided inside the installation groove 301 , and an insert is provided on one side of the rubber water retaining sheet 11 close to the installation groove 301 , the insert matches the slot, and the insert is frictionally connected to the inside of the slot.

[0034] The bracket 13 that needs to be tinned enters the tin plating liquid from between the two rubber water retaining sheets 11 to perform the tin plating operation. During the tin plating process, the tin plating liquid continuously flows out from between the two rubber water retaining sheets 11. Therefore, the tin plating liquid water pump 4 is required to continuously inject the tin plating liquid into the tin plating sub-tank 3 to ensure the stability of the tin plating liquid level.

[0035] The height between the bottom end of the rubber water retaining sheet 11 and the mounting groove 301 can be changed by adjusting the position of the inserting strip inside the slot, so that the tin plating liquid can flow out at a certain rate.

[0036] According to a further optimized solution, the tinning mother tank 1 is connected to the tinning liquid water pump 4 through the first connecting pipe 6 .

[0037] According to a further optimized solution, the tinning liquid water pump 4 is connected to the tinning sub-tank 3 via a second connecting pipe 7 .

[0038] To further optimize the solution, the bottom end of the tin plating liquid overflow collection tank 2 is connected to the tin plating mother tank 1 through the third connecting pipe 9.

[0039] To further optimize the solution, slots 201 are provided on the left and right sides of the tin plating liquid overflow collection tank 2.

[0040] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A liquid level control device for preventing the tin-plated layer of a bracket from turning yellow, characterized in that: include: A tin plating liquid overflow collecting trough (2), wherein the tin plating liquid overflow collecting trough (2) is used to collect overflowed tin liquid; A tinning sub-trough (3) is placed inside the tinning liquid overflow collecting trough (2), and the tinning sub-trough (3) is filled with the tin liquid; The left and right sides of the tinning sub-trough (3) are respectively provided with liquid blocking structures, a liquid level sensor (10) is installed in the tinning sub-trough (3), and the liquid level sensor (10) is electrically connected to a liquid level control box (5); The bottom end of the tinning liquid overflow collection tank (2) is connected to the tinning mother tank (1), the bottom of the tinning mother tank (1) is connected to the liquid inlet end of the tinning liquid water pump (4), the liquid outlet end of the tinning liquid water pump (4) is connected to the bottom of the tinning sub-tank (3), and the tinning liquid water pump (4) is electrically connected to the liquid level control box (5).

2. A liquid level control device for preventing the tin-plated layer of a bracket from turning yellow according to claim 1, characterized in that: The liquid retaining structure comprises a mounting groove (301), two rubber water retaining sheets (11) are arranged inside the mounting groove (301), and a gap is left between the two rubber water retaining sheets (11).

3. A liquid level control device for preventing the tin-plated layer of a bracket from turning yellow according to claim 2, characterized in that: A slot is provided inside the installation groove (301), and an insert strip is provided on one side of the rubber water retaining sheet (11) close to the installation groove (301), the insert strip matches the slot, and the insert strip is frictionally connected to the inside of the slot.

4. A liquid level control device for preventing the tin-plated layer of a bracket from turning yellow according to claim 1, characterized in that: The tinning master tank (1) is connected to the tinning liquid water pump (4) via a first connecting pipe (6).

5. The liquid level control device for preventing the tin-plated layer of a bracket from turning yellow according to claim 1, characterized in that: The tin plating liquid water pump (4) is connected to the tin plating sub-tank (3) via a second connecting pipe (7).

6. A liquid level control device for preventing the tin-plated layer of a bracket from turning yellow according to claim 1, characterized in that: The bottom end of the tin plating liquid overflow collection tank (2) is connected to the tin plating mother tank (1) via a third connecting pipe (9).

7. A liquid level control device for preventing the tin-plated layer of a bracket from turning yellow according to claim 1, characterized in that: The tin plating liquid overflow collection tank (2) is provided with slots (201) on the left and right sides.

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