Vacuum etching machine

Abstract

The utility model relates to a vacuum etching machine, including etching box, pumping roller, drive mechanism, pump and roller, the roller includes lantern ring and a plurality of landing leg, each landing leg has the opposite setting of connecting end and abutting end, connecting end is connected with lantern ring, abutting end is used for the movable abutting with circuit board to drive the circuit board to move, an air exhaust channel penetrates through the abutting end, the connecting end and the lantern ring, each roller is arranged on the air exhaust roller in a sleeving mode through the lantern ring, the air exhaust channel is communicated with the air exhaust groove, and the rollers are matched with the air exhaust roller, so that a'pool effect 'can be prevented from being formed on the surface of the circuit board.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board etching, in particular to a vacuum etching machine. Background Art

[0002] Since the circuit board has a large surface, etching liquid is easily gathered in the middle area during the etching process, causing a "pool effect". In order to eliminate the influence of the pool effect as much as possible, the vacuum suction device for removing the water film on the substrate disclosed in CN209767945U adopts a suction roller to extract the etching liquid on the surface of the circuit board. However, the above-mentioned suction roller will seriously hinder the spraying of the etching liquid, which may easily cause uneven etching on the upper surface of the circuit board. Utility Model Content

[0003] Based on this, it is necessary to provide a vacuum etching machine.

[0004] A vacuum etching machine, comprising:

[0005] Etching box;

[0006] An air extraction roller, the air extraction roller is rotatably arranged in the etching box, the interior of the air extraction roller is hollow to form an air extraction cavity, an air extraction groove is opened on the outer side of the air extraction roller, and the air extraction groove is connected to the air extraction cavity;

[0007] A driving mechanism, the driving mechanism is arranged in the etching box, and the driving mechanism is connected to the air extraction roller and is used to drive the air extraction roller to rotate;

[0008] An air pump, which is disposed in the etching box and is connected to the air extraction cavity of the air extraction roller; and

[0009] A roller wheel, comprising a sleeve and a plurality of legs, each of the legs having a connecting end and an abutting end arranged opposite to each other, the connecting end being connected to the sleeve, the abutting end being used for movably abutting against a circuit board to drive the circuit board to move, an exhaust passage being provided through the abutting end, the connecting end and the sleeve, each of the roller wheels being sleeved on the exhaust roller through the sleeve, and the exhaust passage being communicated with the exhaust groove.

[0010] In the above-mentioned vacuum etcher, driven by the vacuum roller, the legs of the roller can gradually push the circuit board to move in the etching box. When the legs contact the circuit board, the vacuum pump draws out the etching liquid collected on the surface of the circuit board through the vacuum channel, the vacuum groove and the vacuum cavity, thereby avoiding the formation of a "pool effect" on the surface of the circuit board. There are gaps between the legs of the roller to facilitate the passage of the sprayed etching liquid, reduce obstacles to the spraying work, and make the etching of the circuit board more uniform.

[0011] In one of the embodiments, the abutment end is provided with an arc-shaped abutment rib extending in the circumferential direction of the roller.

[0012] In one of the embodiments, a through groove with two sides open is formed on the side of the abutting rib away from the supporting leg, and the through groove is connected to the air extraction channel.

[0013] In one embodiment, the collar and the legs are integrally injection molded.

[0014] In one embodiment, the driving mechanism includes a motor.

[0015] In one of the embodiments, it also includes a liquid storage tank, an acid unloading pump and a nozzle, one end of the acid unloading pump is connected to the liquid storage tank through a first pipe, and the other end is connected to the nozzle through a second pipe, and the nozzle is arranged corresponding to the air extraction roller.

[0016] In one embodiment, there are multiple air suction rollers, each of which is arranged at intervals in the etching box, and each of the air suction rollers is correspondingly provided with multiple rollers.

[0017] In one of the embodiments, a conveying assembly for conveying circuit boards is further included, and the suction roller is arranged on the conveying assembly.

[0018] In one of the embodiments, it further comprises corresponding upper conveying rollers and lower conveying rollers, wherein the upper conveying rollers and the lower conveying rollers are rotatably disposed in the etching box, and the air extraction roller is disposed between two adjacent upper conveying rollers.

[0019] In one of the embodiments, it further includes a lower conveying roller, which is rotatably disposed on the etching box, and the air extraction roller is disposed corresponding to the lower conveying roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic cross-sectional view of a vacuum etching machine according to an embodiment;

[0021] Figure 2 is a schematic diagram of the three-dimensional structure of a roller according to an embodiment;

[0022] Figure 3 It is a schematic diagram of the partial cross-sectional structure of an air suction roller and a roller wheel according to an embodiment. DETAILED DESCRIPTION

[0023] For ease of understanding of the application, the application will be described more fully below. The application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise clearly and specifically defined.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] like Figures 1 to 3 As shown, in one embodiment, a vacuum etching machine 10 is provided, including an etching box 100, an air suction roller 200, a driving mechanism 310, an air suction pump 320 and a roller 400.

[0027] The air extraction roller 200 is rotatably arranged in the etching box 100. For example, the etching chamber is provided with a through hole, and the end of the air extraction roller is inserted into the through hole to achieve a rotatable connection. For another example, the air extraction roller is rotatably connected to the etching box via a bearing. The air extraction roller 200 is hollow inside to form an air extraction cavity 211. The outer side of the air extraction roller 200 is provided with an air extraction groove 212, and the air extraction groove 212 is connected to the air extraction cavity 211.

[0028] The driving mechanism 310 is arranged in the etching box 100, and the driving mechanism 310 is connected to the vacuum roller 200 and is used to drive the vacuum roller 200 to rotate; for example, the driving mechanism includes a motor, and for another example, the driving mechanism includes a motor and a reducer, and the motor drives the vacuum roller 200 to rotate around its own central axis through the reducer. Specifically, the output end of the driving mechanism 310 is provided with a gear disk 311 and meshes with the gear 220 of the vacuum roller 200.

[0029] The vacuum pump 320 is disposed in the etching box 100, and the vacuum pump 320 is connected to the vacuum chamber 211 of the vacuum roller 200. Specifically, the interior of the vacuum pump is connected to the vacuum chamber. In one embodiment, the vacuum pump 320 has a vacuum pipe 321, which extends into the vacuum chamber 211 to evacuate the vacuum chamber 211.

[0030] The roller 400 includes a ring 410 and a plurality of legs 420, each leg 420 having a connecting end 421 and an abutting end 422 that are relatively arranged, the connecting end 421 is connected to the ring 410, the abutting end 422 is used to movably abut with the circuit board 800 to drive the circuit board 800 to move, and an exhaust channel 423 is opened through the abutting end 422, the connecting end 421 and the ring 410, each roller 400 is sleeved on the exhaust roller 200 through the ring 410, and the exhaust channel 423 is connected to the exhaust groove 212.

[0031] In this embodiment, the etching box 100 is provided with a liquid storage tank 110, an acid unloading pump 120 and a nozzle 130 which are connected in sequence through pipelines. One end of the acid unloading pump is connected to the liquid storage tank 110 through a first pipeline 121, and the other end is connected to the nozzle 130 through a second pipeline 122. The nozzle 130 is arranged corresponding to the vacuum roller 200, wherein the acid unloading pump 120 transports the etching liquid in the liquid storage tank 110 to the nozzle 130. When the circuit board 800 passes through the etching box 100, it is etched by the etching liquid to remove the exposed circuits not covered by the protective film. The nozzle 130 is arranged corresponding to the vacuum roller 200 and each roller 400.

[0032] In this embodiment, the abutment end 422 is provided with an arc-shaped abutment rib 430 extending in the circumferential direction of the roller 400. The arc-shaped abutment rib 430 can abut against the circuit board 800 when the roller 400 rotates, thereby better driving the circuit board 800 to move. In this embodiment, a through groove 431 with both sides open is provided on the side of the abutment rib 430 away from the support leg 420, and the through groove 431 is connected to the exhaust channel 423. When the etching liquid flows into the through groove 431, it will be sucked into the exhaust channel 423 through the through groove 431. Since the through groove 431 can be opened at both ends, the etching liquid on the surface of the circuit board 800 can be better extracted from the side. In this embodiment, there are multiple vacuum rollers 200, and each vacuum roller 200 is arranged at intervals in the etching box 100. Each vacuum roller 200 is correspondingly provided with multiple rollers 400, so that the circuit board 800 can be transported over a longer distance, and the multiple rollers 400 can well absorb the etching liquid 900 gathered on the surface of the circuit board 800.

[0033] like Figure 3 As shown by the dotted line, the etching liquid 900 collected on the surface of the circuit board 800 is sucked into the through groove 431 along with the gas, and passes through the exhaust channel 423, the exhaust groove 212 and the exhaust cavity 211 in sequence, and then enters the exhaust pipe 321. Figure 1 The air pump 320 delivers the gas and etching liquid in the air pump pipe 321 to the outside. For example, a filtering device is provided outside, and the air pump delivers the gas and etching liquid to the filtering device.

[0034] In this embodiment, the collar 410, the legs 420 and the abutting ribs 430 are integrally injection molded, so that the connection strength between the collar 410 is higher, and the injection-molded collar 410 can be well interference-fitted with the air extraction roller 200, making the roller 400 more stable, and the injection-molded abutting ribs 430 are not easy to damage the surface of the circuit board 800 while conveying the circuit board 800. Specifically, the collar 410, the legs 420 and the abutting ribs 430 are integrally injection molded of acid-resistant plastic to avoid corrosion by etching liquid.

[0035] In this embodiment, a conveying assembly for conveying the circuit board is also included, and the air extraction roller is arranged on the conveying assembly. The conveying assembly is used to convey the circuit board 800 so that the circuit board 800 passes through the etching box 100. For example, the conveying assembly includes a conveying roller, and for another example, the conveying assembly includes a robot arm.

[0036] In this embodiment, the vacuum etching machine 10 further includes a lower conveying roller 330, or the conveying assembly includes a lower conveying roller 300, the lower conveying roller 330 is rotatably arranged in the etching box 100, and the air extraction roller 200 is arranged corresponding to the lower conveying roller 330. In this embodiment, the air extraction roller 200 is used as an upper conveying roller, which is arranged corresponding to the lower conveying roller 330, and the circuit board 800 is transmitted between the two. The air extraction roller 200 drives the circuit board 800 to move through the roller 400, and has an air extraction function at the same time to avoid the pool effect on the surface of the circuit board 800. In other embodiments, the vacuum etching machine also includes corresponding upper and lower conveying rollers, the upper and lower conveying rollers are rotatably arranged in the etching box, the air extraction roller is arranged between two adjacent upper conveying rollers, and the air extraction roller and the upper conveying roller are alternately arranged, so that the conveying function of the upper conveying roller and the air suction function of the air extraction roller can cooperate with each other to avoid the pool effect on the surface of the circuit board while transmitting the circuit board.

[0037] In the above-mentioned vacuum etcher 10, the circuit board 800 passes through the etching box 100 along with the conveyance of the vacuum roller 200 and the lower conveying roller 330, and the acid discharge pump 120 conveys the etching liquid in the liquid storage tank 110 to the nozzle 130 and sprays it out, thereby etching the exposed circuits of the circuit board 800. During the acid spraying process, the etching liquid can pass through the gap between the adjacent legs 420 of the roller 400 well. Compared with the suction roller of the prior art, the spraying of the etching liquid is not easily blocked, so that the etching liquid is sprayed more evenly onto the circuit board 800. When the circuit board 800 passes through the roller 400, the vacuum pump 320 extracts the etching liquid 900 gathered on the surface of the circuit board 800 through the vacuum channel 423, the vacuum groove 212 and the vacuum cavity 211, thereby avoiding the formation of a "pool effect" on the surface of the circuit board 800, making the etching of the circuit board more uniform.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A vacuum etching machine, characterized in that: include: Etching box; An air extraction roller, the air extraction roller is rotatably arranged in the etching box, the interior of the air extraction roller is hollow to form an air extraction cavity, an air extraction groove is opened on the outer side of the air extraction roller, and the air extraction groove is connected to the air extraction cavity; A driving mechanism, the driving mechanism is arranged in the etching box, and the driving mechanism is connected to the air extraction roller and is used to drive the air extraction roller to rotate; An air pump, which is disposed in the etching box and is connected to the air extraction cavity of the air extraction roller; and A roller wheel, comprising a sleeve and a plurality of legs, each of the legs having a connecting end and an abutting end arranged opposite to each other, the connecting end being connected to the sleeve, the abutting end being used for movably abutting against a circuit board to drive the circuit board to move, an exhaust passage being provided through the abutting end, the connecting end and the sleeve, each of the roller wheels being sleeved on the exhaust roller through the sleeve, and the exhaust passage being communicated with the exhaust groove.

2. The vacuum etching machine according to claim 1, characterized in that: The abutment end is provided with an arc-shaped abutment rib extending in the circumferential direction of the roller.

3. The vacuum etching machine according to claim 2, characterized in that: A through groove with two sides open is formed on the side of the abutting rib away from the supporting leg, and the through groove is communicated with the air extraction channel.

4. The vacuum etching machine according to claim 1, characterized in that: The collar and the legs are integrally injection-molded.

5. The vacuum etching machine according to claim 1, characterized in that: The driving mechanism includes a motor.

6. The vacuum etching machine according to claim 1, characterized in that: It also includes a liquid storage tank, an acid discharge pump and a nozzle. One end of the acid discharge pump is connected to the liquid storage tank through a first pipeline, and the other end is connected to the nozzle through a second pipeline. The nozzle is arranged corresponding to the air extraction roller.

7. The vacuum etching machine according to claim 1, characterized in that: There are multiple air extraction rollers, each of which is arranged at intervals in the etching box, and each of the air extraction rollers is correspondingly provided with multiple rollers.

8. The vacuum etching machine according to claim 1, characterized in that: It also includes a conveying component for conveying the circuit board, and the suction roller is arranged on the conveying component.

9. The vacuum etching machine according to claim 1, characterized in that: It also includes corresponding upper conveying rollers and lower conveying rollers, which are rotatably arranged on the etching box, and the air extraction roller is arranged between two adjacent upper conveying rollers.

10. The vacuum etching machine according to claim 1, characterized in that: It also includes a lower conveying roller, which is rotatably arranged on the etching box, and the air extraction roller is arranged corresponding to the lower conveying roller.

Images