Water retaining wheel assembly and etching device

Abstract

The present application provides a water-blocking wheel assembly, including a first roller and a second roller. The first roller includes a first body and a first cam, the first cam is arranged on the outer periphery of the first body, and the first body is provided with a first groove. The second roller includes a second body and a second cam, the second cam is arranged on the outer periphery of the second body, and the second body is provided with a second groove. The water-blocking wheel assembly includes a closed state and an open state. The closed state is that the first cam is accommodated in the second groove, the second cam is accommodated in the first groove, and the outer periphery of the first body is closely connected to the outer periphery of the second body; the open state is that the first cam exits the second groove, the second cam exits the second groove, and the first body and the second body are spaced apart. The water-blocking wheel assembly provided by the present application can prevent the escape of medicine, reduce waste and pollution. In addition, the present application also provides an etching device.

Description

Technical Field

[0001] The present application relates to a water retaining wheel assembly and an etching device. Background Art

[0002] Circuit boards are generally made of copper-clad substrates through a series of processes including cutting, drilling, copper plating, exposure, development, etching, lamination, printing, and molding. Etching is an important process in circuit board manufacturing, which mainly uses an etching device to selectively etch the copper foil layer on the surface of the circuit board to be etched to form a circuit pattern.

[0003] Generally, the etching device includes an etching tank, a conveying roller and a chemical sprayer. The conveying roller is arranged in the etching tank for conveying the circuit board to be etched. The chemical sprayer is arranged above the conveying roller for spraying the etching chemical toward the circuit board to be etched. The side of the etching tank is provided with a feed port and a discharge port. The feed port is used for the circuit board to be etched to enter the etching tank, and the discharge port is used for the etched circuit board to be removed from the etching tank. However, the small particles of chemical produced during the spraying process are also easy to escape from the inlet and the outlet, which not only causes the waste of chemical, but also affects the next process. Summary of the invention

[0004] In view of the above, it is necessary to provide a water retaining wheel assembly to solve the above problems.

[0005] In addition, it is also necessary to provide an etching device having the above-mentioned water retaining wheel assembly.

[0006] A water retaining wheel assembly includes a first roller and a second roller, wherein the first roller includes a first body and a first cam, wherein the first cam is arranged on the outer periphery of the first body, and the first body is provided with a first groove. The second roller includes a second body and a second cam, wherein the second cam is arranged on the outer periphery of the second body, and the second body is provided with a second groove. The water retaining wheel assembly includes a closed state and an open state, wherein the closed state includes the first cam being accommodated in the second groove, the second cam being accommodated in the first groove, and the outer periphery of the first body being in close contact with the outer periphery of the second body. The open state includes the first cam exiting the second groove, the second cam exiting the second groove, and the first body and the second body being arranged at a distance.

[0007] Furthermore, it also includes a lifting mechanism, which is transmission-connected to the first roller and the second roller, and is used to drive the water-blocking wheel group to switch between the closed state and the open state.

[0008] Furthermore, it also includes a driving member, the first roller has a first rotating axis, the second roller has a second rotating axis, the driving member is connected to the first roller to drive the first roller to rotate around the first rotating axis, and the driving member is also connected to the second roller to drive the second roller to rotate around the second rotating axis.

[0009] Furthermore, it also includes a position sensor and a control unit, the control unit is electrically connected to the position sensor, the lifting mechanism and the driving component, the sensor is used to sense the position information of the circuit board, and the control unit controls the start and stop of the lifting mechanism and the driving component according to the position information.

[0010] Furthermore, the first body and the first cam are an integrally formed structure, and the second body and the second cam are an integrally formed structure.

[0011] Furthermore, the first cam is detachably mounted on the outer circumference of the first body, and the second cam is detachably mounted on the outer circumference of the second body.

[0012] Furthermore, the cross-sections of the first cam and the second cam are square or semicircular.

[0013] An etching device comprises a tank body, a conveying assembly, a spray assembly and the water retaining wheel assembly as described above. The conveying assembly is arranged in the tank body, and the conveying assembly is used to transport the circuit board to be etched. The spray assembly is arranged above the conveying assembly, and the spray assembly is used to spray etching solution toward the circuit board to be etched. The tank body is provided with a feed inlet and a discharge outlet, and the water retaining wheel assembly cover is arranged on the feed inlet and the discharge outlet.

[0014] Furthermore, the transmission assembly and the water-blocking wheel assembly are arranged side by side.

[0015] Furthermore, the trough body includes a bottom plate and a plurality of side plates, the side plates are arranged on the same side of the bottom plate, and the feed port and the discharge port are formed through the side plates.

[0016] The present application provides that by providing the first groove capable of accommodating the second cam on the first body and the second groove capable of accommodating the first cam on the second body, the water retaining wheel assembly can completely close the feed port and the discharge port, thereby reducing the waste and pollution of the medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of an etching device provided in one embodiment of the present application.

[0018] Figure 2A schematic diagram of a water retaining wheel assembly in a closed state is provided for one embodiment of the present application.

[0019] Figure 3 A schematic diagram of a water retaining wheel assembly in an open state provided in an embodiment of the present application.

[0020] Figure 4 A view of a water retaining wheel assembly provided in another embodiment of the present application.

[0021] Main component symbols

[0022] Etching device 100

[0023] Tank 10

[0024] Bottom plate 11

[0025] Side Panel 12

[0026] Feed port 121

[0027] Discharge port 122

[0028] Transmission component 20

[0029] Spray assembly 30

[0030] Water retaining wheel set 40, 60

[0031] First roller 41

[0032] First body 411

[0033] First cams 412, 414

[0034] First groove 413

[0035] Second roller 42

[0036] Second body 421

[0037] Second cams 422, 424

[0038] Second groove 423

[0039] Lifting mechanism 43

[0040] Driving member 44

[0041] Sensor 45

[0042] Control unit 46

[0043] Circuit board 200

[0044] Accommodation space R

[0045] Closed state B

[0046] Open state D

[0047] The first axis O

[0048] The second rotation axis P

[0049] Gap J

[0050] Effective area X

[0051] Contact area Y

[0052] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0054] See also Figure 1 An embodiment of the present application provides an etching device 100, which is used to selectively etch the copper foil layer of the circuit board 200 to be etched to form a circuit layer.

[0055] The etching device 100 includes a tank body 10, a conveying assembly 20, a spray assembly 30 and a water-retaining wheel assembly 40. The tank body 10 is roughly box-shaped, and includes a bottom plate 11 and a plurality of side plates 12, and the side plates 12 are arranged around the bottom plate 11 to form an accommodating space R. The conveying assembly 20 is arranged in the accommodating space R, and the conveying assembly 20 is used to transport the circuit board 200 to be etched. The spray assembly 30 is arranged above the conveying assembly 20, and the spray assembly 30 is used to spray etching solution toward the circuit board 200 to be etched, and the etching solution etches the circuit board 200 to be etched so that the copper foil layer forms a circuit layer. The side plate 12 is provided with a feed inlet 121 and a discharge port 122 opposite to the feed inlet 121, the feed inlet 121 is used for the circuit board 200 to be etched to enter the accommodating space R, and the discharge port 122 is used for the etched circuit board 200 to be transported out of the accommodating space R. The water retaining wheel group 40 and the conveying assembly 20 are arranged side by side in the accommodating space R, and the water retaining wheel group 40 covers the feed inlet 121 and the discharge port 122.

[0056] See also Figure 2In this embodiment, the water retaining wheel assembly 40 includes a first roller 41 and a second roller 42. The first roller 41 includes a first body 411 and a plurality of first cams 412. The first body 411 is substantially cylindrical, the first cam 412 is substantially annular, the first cam 412 is sleeved on the outer periphery of the first body 411, and the outer side of the first body 411 is concave to form a plurality of first grooves 413. The second roller 42 has a similar structure to the first roller 41. The second roller 42 includes a second body 421 and a plurality of second cams 422. The second body 421 is substantially cylindrical, the second cam 422 is substantially annular, the second cam 422 is sleeved on the outer periphery of the second body 421, and the outer side of the second body 421 is concave to form a plurality of second grooves 423. The first cam 412 can be accommodated in the second groove 423, and the second cam 422 can be accommodated in the first groove 413, so that the outer periphery of the first body 411 and the outer periphery of the second body 421 can be tightly connected.

[0057] Please also see Figure 2 and Figure 3 When in use, the water retaining wheel assembly 40 includes a closed state B and an open state D. When in the closed state B, the first cam 412 is accommodated in the second groove 423, the second cam 422 is accommodated in the first groove 413, and the outer periphery of the first body 411 is closely connected to the outer periphery of the second body 421. At this time, the water retaining wheel assembly 40 seals the feed port 121 and the discharge port 122, and the circuit board 200 to be etched can only move in the accommodating space R. At the same time, the liquid sprayed by the spray assembly 30 will not escape from the feed port 121 and the discharge port 122. When in the open state D, the first body 411 and the second body 421 are spaced apart, that is, there is a gap J between the first body 411 and the second body 421, and the first cam 412 withdraws from the second groove 423, and the second cam 422 withdraws from the first groove 413, and the circuit board 200 to be etched can enter the gap J from the feed port 121, and the circuit board 200 is divided into a plurality of effective areas X and a plurality of contact areas Y along the extension direction E, and the effective area X is provided with a circuit layer that is easily damaged (not shown), and the contact area Y is not provided with a circuit layer. Therefore, the first cam 412 and the second cam 422 are in rolling contact with the contact area Y of the circuit board 200, thereby driving the circuit board 200 to be etched into the accommodating space R, or the etched circuit board 200 passes through the gap J and the discharge port 122 in sequence and is sent out of the accommodating space R.

[0058] The present application provides that the first groove 413 capable of accommodating the second cam 422 is provided on the first body 411, and the second groove 423 capable of accommodating the first cam 412 is provided on the second body 421, so that the outer periphery of the first body 411 and the outer periphery of the second body 421 can be closely connected, thereby facilitating the water retaining wheel assembly 40 to completely close the feed port 121 and the discharge port 122, reducing the waste and pollution of the liquid medicine. At the same time, through the rolling contact between the first cam 412 and the second cam 422 and the circuit board 200, it is beneficial to reduce the overall contact area between the first roller 41 or the second roller 42 and the circuit board 200, reducing the risk of scratching the circuit board 200 and adhesion of foreign matter.

[0059] In this embodiment, the first body 411 and the first cam 412 are an integrally formed structure, the second body 421 and the second cam 422 are an integrally formed structure, and the cross-sections of the first cam 412 and the second cam 422 are square. Figure 4 Another embodiment of the present application provides another water retaining wheel assembly 60, wherein the first cam 414 is detachably mounted on the outer periphery of the first body 411, and the second cam 424 is detachably mounted on the outer periphery of the second body 421, and the shapes of the first cam 414 and the second cam 424 are roughly the same as an "O" ring, and the cross-sections of the first cam 414 and the second cam 424 are semicircular. Thus, the first cam 414 or the second cam 424 has a smaller contact area with the circuit board 200 to be etched.

[0060] In this embodiment, the water retaining wheel assembly 40 further includes a lifting mechanism 43, and the lifting mechanism 43 is transmission-connected to the first roller 41 and the second roller 42 to drive the water retaining wheel assembly 40 to switch between the closed state B and the open state D. In some embodiments, the lifting mechanism 43 includes one of a hydraulic lift, an electric lift, and a pneumatic lift.

[0061] In an embodiment, the water retaining wheel assembly 40 further includes a driving member 44, and the driving member 44 is transmission-connected to the first roller 41 and the second roller 42. The first roller 41 has a first rotating shaft O, and the second roller 42 has a second rotating shaft P, and the first rotating shaft O and the second rotating shaft P are arranged substantially parallel. The driving member 44 drives the first roller 41 to rotate around the first rotating shaft O, and the driving member 44 also drives the second roller 42 to rotate around the second rotating shaft P, thereby driving the circuit board 200 to move. In some embodiments, the driving member 44 includes one of a servo motor, a stepping motor, and an internal combustion engine.

[0062] In this embodiment, the water retaining wheel assembly 40 further includes a sensor 45 and a control unit 46. The control unit 46 is electrically connected to the sensor 45, the lifting mechanism 43 and the driving member 44. The sensor 45 is disposed on the transmission assembly 20, and the sensor 45 is used to sense the position information of the circuit board 200 and transmit the position information to the control unit 46, and the position information includes first position information and second position information. The first position information is "the minimum distance between the circuit board 200 and the first roller 41 or the second roller 42 is less than 5 cm", and the second position information is "the minimum distance between the circuit board 200 and the first roller 41 or the second roller 42 is greater than 5 cm". The control unit 46 controls the start and stop of the lifting mechanism 43 and the driving member 44 according to the position information. Specifically, if the control unit 46 receives the first position information, the control unit 46 controls the lifting mechanism 43 to start working until the water retaining wheel assembly 40 is in the open state D, and the control unit 46 controls the driving member 44 to start working until the circuit board 200 is completely moved out of the accommodating space R. If the control unit 46 receives the second position information, the control unit 46 controls the lifting mechanism 43 and the driving member 44 to not work, and the water retaining wheel group 40 is in the closed state B, thereby realizing the automatic control of the water retaining wheel group 40. In some embodiments, the sensor 45 can be a laser rangefinder, and the control unit 46 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc.

[0063] In addition, those skilled in the art may also make other changes within the spirit of the present application. Of course, these changes made according to the spirit of the present application should be included in the scope of protection required by the present application.

Claims

1. A water retaining wheel assembly, characterized in that: comprising a first roller and a second roller, The first roller comprises a first body and a first cam, the first cam is arranged on the outer circumference of the first body, and the first body is provided with a first groove; The second roller comprises a second body and a second cam, the second cam is arranged on the outer circumference of the second body, and the second body is provided with a second groove; The water retaining wheel assembly includes a closed state and an open state. The closed state is that the first cam is accommodated in the second groove, the second cam is accommodated in the first groove, and the outer periphery of the first body contacts the outer periphery of the second body; the open state is that the first cam is separated from the second groove, the second cam is separated from the second groove, and the first body and the second body are spaced apart. A lifting mechanism, the lifting mechanism is transmission-connected to the first roller and the second roller, and the lifting mechanism is used to drive the water retaining wheel assembly to switch between the closed state and the open state; The first roller has a first rotation axis, the second roller has a second rotation axis, the driving member is connected to the first roller for driving the first roller to rotate around the first rotation axis, and the driving member is also connected to the second roller for driving the second roller to rotate around the second rotation axis.

2. The water retaining wheel assembly according to claim 1, characterized in that: It also includes a position sensor and a control unit, the control unit is electrically connected to the position sensor, the lifting mechanism and the driving member, the sensor is used to sense the position information of the circuit board, and the control unit controls the lifting mechanism and the driving member to start or stop running according to the position information.

3. The water retaining wheel assembly according to claim 1, characterized in that: The first body and the first cam are an integrally formed structure, and the second body and the second cam are an integrally formed structure.

4. The water retaining wheel assembly according to claim 1, characterized in that: The first cam is detachably mounted on the outer circumference of the first body, and the second cam is detachably mounted on the outer circumference of the second body.

5. The water retaining wheel assembly according to claim 1, characterized in that: The cross sections of the first cam and the second cam are square or semicircular.

6. An etching device, characterized in that: It comprises a tank body, a transmission component, a spray component and a water retaining wheel assembly as claimed in any one of claims 1 to 5; The conveying assembly is disposed in the tank body, and the conveying assembly is used to transport the circuit board to be etched; The spray assembly is arranged above the conveying assembly, and the spray assembly is used to spray etching solution toward the circuit board to be etched; The tank body is provided with a feed inlet and a discharge outlet, and the water retaining wheel assembly cover is arranged on the feed inlet and the discharge outlet.

7. The etching device according to claim 6, characterized in that The transmission assembly and the water retaining wheel assembly are arranged side by side.

8. The etching device according to claim 6, characterized in that The tank body includes a bottom plate and a plurality of side plates, wherein the side plates are arranged on the same side of the bottom plate, and the feed port and the discharge port are formed through the side plates.

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