Uniform gold immersion cylinder for PCB production

Abstract

The utility model discloses a uniform gold immersion cylinder for PCB production. The method belongs to the technical field of PCB copper surface gold immersion. According to the technical key points, the device comprises a cylinder body, an air distribution pipeline is arranged at the bottom in the cylinder body, and a plurality of air outlet holes which are symmetrical along the central axis of the pipeline and incline towards the two sides are uniformly distributed in the bottom of the air distribution pipeline; the gas distribution pipeline is fixed on the inner bottom surface of the cylinder body through a plurality of clamping rings, and the distance between the bottom of the gas distribution pipeline and the inner bottom surface of the cylinder body is 2-4cm; a flow uniformizing plate is detachably arranged above the gas distribution pipeline, and the distance between the flow uniformizing plate and the gas distribution pipeline is 3-5cm; lifting lugs are hinged to the two ends of the flow uniformizing plate in the length direction. The utility model aims to provide the uniform gold immersion cylinder for PCB production, which is simple in structure and uniform in gold immersion liquid medicine distribution; the method is used for performing gold immersion on the copper surface of the PCB during production of the PCB.

Description

Technical Field

[0001] The utility model relates to a gold sinking cylinder, and more specifically, to a uniform gold sinking cylinder for producing PCB boards. Background Art

[0002] In the manufacturing of printed circuit boards (PCBs), the uniformity of immersion gold in the immersion gold production process is a cost-reduction and efficiency-enhancing issue for all companies. It is necessary to improve and enhance the uniformity of immersion gold from aspects such as the solution, equipment structure and circulation volume. This will improve the uniformity and efficiency of immersion gold while ensuring product quality.

[0003] In order to improve the gold sinking efficiency, in the existing production, an H-shaped air distribution pipeline is set at the bottom of the gold sinking cylinder to pump air to the bottom of the cylinder so that the medicine can be distributed as evenly as possible. The gas diversion effect in this structure is still poor, and most of the gas is concentrated near the two air distribution pipelines. Utility Model Content

[0004] The utility model aims to provide a uniform gold sinking cylinder for PCB board production with a simple structure and uniform distribution of gold sinking liquid in view of the above-mentioned deficiencies in the prior art.

[0005] The technical solution of the utility model is achieved as follows: a uniform gold sinking cylinder for PCB board production, comprising a cylinder body, an air distribution pipeline is provided at the inner bottom of the cylinder body, and a plurality of air outlet holes are evenly distributed at the bottom of the air distribution pipeline, which are symmetrical along the central axis of the pipeline and inclined toward both sides; the air distribution pipeline is fixed to the bottom surface of the cylinder body by a plurality of clamping rings, and the distance between the bottom of the air distribution pipeline and the bottom surface of the cylinder body is 2-4cm.

[0006] A flow equalizer plate is detachably provided above the air distribution pipeline, and the distance between the flow equalizer plate and the air distribution pipeline is 3-5 cm; and lifting ears are hinged at both ends of the flow equalizer plate along the length direction.

[0007] In the above-mentioned uniform gold sinking cylinder for PCB board production, the flow plate is provided with positioning end plates inclined downward at both ends along the length direction, and a clearance gap is provided in the middle of the positioning end plate; when the flow plate is installed in the cylinder body, the free end of the lifting ear is placed on the positioning end plate.

[0008] In the above-mentioned uniform gold sinking cylinder for PCB board production, a plurality of supporting feet are provided at the bottom of the flow equalizer plate.

[0009] In the above-mentioned uniform gold sinking cylinder for PCB board production, the gas distribution pipeline includes at least four gas pipes, which are connected by a number of connecting pipes, and the air outlet is arranged at the bottom of each gas pipe; the connecting pipe between the two middle gas pipes is connected to an air inlet pipe that cooperates with an external air pumping device.

[0010] After the utility model adopts the above structure, the air outlet holes are arranged at the bottom of the air distribution pipeline and are symmetrically inclined toward both sides along the central axis of the pipeline, so that the gas is evenly dispersed to both sides for the first uniform flow. When the gas rises, it collides with the uniform flow plate for the second uniform flow, so that the gas is evenly distributed in the gold sinking cylinder, which can effectively improve the uniformity of the distribution of the medicine solution, improve the gold sinking efficiency, and ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described in detail below in conjunction with the embodiments in the accompanying drawings, but this does not constitute any limitation to the present invention.

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a schematic diagram of the structure of the utility model without the cylinder body;

[0014] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0015] Figure 4 It is a structural schematic diagram of the gas distribution pipeline of the utility model.

[0016] In the figure: 1. Cylinder body; 2. Air distribution pipeline; 2a. Air delivery pipe; 2b. Connecting pipe; 2c. Air inlet pipe; 3. Air outlet hole; 4. Clamp; 5. Flow equalizer; 6. Lifting ear; 7. Positioning end plate; 8. Clearance gap; 9. Support foot. DETAILED DESCRIPTION

[0017] See also Figure 1-4 As shown, the utility model is a uniform gold sinking cylinder for PCB board production, including a cylinder body 1, an air distribution pipeline 2 is provided at the bottom of the cylinder body 1, and a plurality of air outlet holes 3 are evenly distributed at the bottom of the air distribution pipeline 2, which are symmetrically arranged along the central axis of the pipeline and inclined toward both sides; the air distribution pipeline 2 is fixed to the inner bottom surface of the cylinder body 1 by a plurality of clamping rings 4, and the spacing between the bottom of the air distribution pipeline 2 and the inner bottom surface of the cylinder body 1 is 2-4cm. A heater for heating the gold sinking solution is provided in the cylinder body, and its specific structure and installation method are common knowledge of those skilled in the art, and will not be repeated here. By arranging the air outlet holes at the bottom of the air distribution pipeline and symmetrically arranged along the central axis of the pipeline and inclined toward both sides, the gas is evenly dispersed toward both sides for the first uniform flow. A gap of 2-4cm is left between the bottom of the air distribution pipeline and the inner bottom surface of the cylinder body, so that the gas has sufficient diffusion space after being ejected from the air outlet holes, so that the gas can be diffused into a larger range as much as possible.

[0018] A detachable flow plate 5 is provided above the gas distribution pipeline 2, and the distance between the flow plate 5 and the gas distribution pipeline 2 is 3-5 cm; ears 6 are hinged at both ends of the flow plate 5 along the length direction. When the gas rises, it collides with the flow plate to perform a second flow equalization, so that the gas is evenly distributed in the gold sinking cylinder.

[0019] In this embodiment, the flow equalizer 5 is provided with positioning end plates 7 tilted downward at both ends along the length direction, and a clearance notch 8 is provided in the middle of the positioning end plate 7; when the flow equalizer 5 is installed in the cylinder body 1, the free end of the lifting ear 6 is placed on the positioning end plate 7. The two ends of the flow equalizer are positioned by cooperating with the inner wall of the cylinder body through the positioning end plate, and the lifting ear is placed through the positioning end plate to prevent the lifting ear from being in a downward state under the action of gravity so that the free end of the lifting ear is located below the flow equalizer, making it difficult for the lifting tool to cooperate with the lifting ear to remove the flow equalizer. A clearance notch is provided in the middle of the positioning end plate to further facilitate the lifting tool to cooperate with the lifting ear.

[0020] In this embodiment, a plurality of supporting feet 9 are provided at the bottom of the flow equalizer 5. The flow equalizer is installed in the cylinder body through the supporting feet. The size of the flow equalizer is adapted to the cylinder body, and the end of the flow equalizer is matched with the inner wall of the cylinder body for positioning.

[0021] In this embodiment, the gas distribution pipeline 2 includes at least four gas pipes 2a, which are connected by a plurality of connecting pipes 2b, and the gas outlet 3 is arranged at the bottom of each gas pipe 2a; the connecting pipe 2b between the two middle gas pipes 2a is connected with an air inlet pipe 2c that cooperates with an external air pumping device. Increasing the number of gas pipes in the gas distribution pipeline to at least four reduces the distance between two gas pipes, reduces the horizontal distance of gas diffusion, and reduces the gradual decrease of gas concentration from near the gas pipe to the outside, effectively increasing the uniformity of the gas.

[0022] When in use, fix the air supply pipe to the bottom of the cylinder body through a buckle, connect the air inlet pipe to the external air pumping equipment, place the flow equalizer in the cylinder body through the lifting equipment, then inject the gold immersion solution into the cylinder body and heat it, put the PCB board to be gold immersion into the cylinder body through the lifting device, and pump air with the air pump to make the solution contact with the copper surface of the PCB board evenly.

[0023] The above embodiments are preferred implementation modes of the present invention and are only used to facilitate the explanation of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the relevant technical field, if they do not depart from the scope of the technical features of the present invention, can make equivalent embodiments by partial changes or modifications to the technical contents disclosed in the present invention, and they still fall within the scope of the technical features of the present invention without departing from the technical features of the present invention.

Claims

1. A uniform gold sinking cylinder for PCB board production, comprising a cylinder body (1), characterized in that: The bottom of the cylinder body (1) is provided with an air distribution pipeline (2), and the bottom of the air distribution pipeline (2) is evenly distributed with a plurality of air outlet holes (3) arranged symmetrically along the central axis of the pipeline and inclined toward both sides; the air distribution pipeline (2) is fixed to the bottom surface of the cylinder body (1) by a plurality of clamping rings (4), and the distance between the bottom of the air distribution pipeline (2) and the bottom surface of the cylinder body (1) is 2-4 cm; A flow equalizer plate (5) is detachably provided above the gas distribution pipeline (2), and the distance between the flow equalizer plate (5) and the gas distribution pipeline (2) is 3-5 cm; and lifting ears (6) are hingedly connected at both ends of the flow equalizer plate (5) along the length direction.

2. The uniform gold sinking cylinder for PCB board production according to claim 1 is characterized in that: The flow equalizer plate (5) is provided with positioning end plates (7) at both ends thereof tilted downward in the length direction, and a clearance notch (8) is provided in the middle of the positioning end plate (7); when the flow equalizer plate (5) is installed in the cylinder body (1), the free end of the lifting lug (6) is placed on the positioning end plate (7).

3. The uniform gold sinking cylinder for PCB board production according to claim 1, characterized in that: A plurality of supporting feet (9) are provided at the bottom of the flow equalizer plate (5).

4. The uniform gold sinking cylinder for PCB board production according to claim 1, characterized in that: The gas distribution pipeline (2) comprises at least four gas pipes (2a), each of which is connected via a plurality of connecting pipes (2b), and the gas outlet (3) is arranged at the bottom of each gas pipe (2a); an air inlet pipe (2c) that cooperates with an external air pumping device is connected to the connecting pipe (2b) between the two middle gas pipes (2a).

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