PCB drying device

Abstract

The utility model belongs to the technical field of PCB processing, and discloses a PCB drying device. The PCB drying device comprises a box body, a separation assembly, conveying wheels, a transmission mechanism and a first bearing, the separation assembly is arranged in the box body and comprises a first separation plate and a second separation plate, the first separation plate divides the box body into a transmission cavity and a conveying cavity, the second separation plate divides the transmission cavity into a separation area and a transmission area, and shaft holes are formed in the first separation plate and the second separation plate; the conveying wheels are arranged in the conveying cavity at intervals in the first direction to form a wheel chain, the conveying wheels roll to convey the PCBs in the second direction, and the second direction is perpendicular to the first direction; the transmission mechanism is arranged in the transmission area and comprises a driving piece and a shaft rod, the driving piece can drive the shaft rod to rotate, and the shaft rod penetrates through the two shaft holes and the conveying wheel and is connected with the conveying wheel; the first bearing is arranged between the shaft rod and the conveying wheel. By arranging the transmission cavity, the powder particles cannot enter the conveying cavity, and the quality of the PCB is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB processing, in particular to a PCB board drying device. Background Art

[0002] In the PCB (Printed Circuit Board) industry, the final module in each wet process is a drying module. After the PCBs have been rinsed with chemicals and water, they are blown and dried through a drying unit. This unit typically consists of a forced air drying mechanism and a hot air drying mechanism. The drying unit uses a blower to provide air, which is then finely filtered and then supplied to an air knife. The air knife blows the forced and hot air onto the PCBs, drying them. During the drying process, the PCBs are continuously conveyed by a plastic gear transmission.

[0003] Because the plate drying device is a high-temperature mechanism (the temperature of the hot air drying section is generally 80°C-100°C), the high temperature of the inner cavity can cause dry friction between the plastic gears. After long-term operation, the plastic gears are not only prone to wear but also generate dust and particles when the plastic gears wear. Since the plate drying device is the last module in the PCB manufacturing process and there are no subsequent cleaning treatment modules, the dust and particles generated by the plastic gear transmission can affect the quality of the PCB boards for some PCB processes with high requirements for dryness and cleanliness. Utility Model Content

[0004] The present utility model aims to provide a PCB drying device to solve the problem in the prior art that the high temperature of the inner cavity of the drying device causes dry friction between plastic gears, which not only easily wears the plastic gears but also generates dust and particles when the plastic gears wear, thereby affecting the quality of the PCB boards. The utility model reduces the maintenance cost of the drying device and improves the quality of the PCB boards.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Provided is a PCB drying device, comprising:

[0007] Box body;

[0008] A partition assembly is provided in the box body and includes a first partition plate and a second partition plate. The first partition plate divides the box body into a transmission chamber and a conveying chamber. The second partition plate divides the transmission chamber into an air separation area and a transmission area. Both the first partition plate and the second partition plate are provided with an axial hole.

[0009] Conveying wheels, wherein the conveying wheels are multiple and are arranged in the conveying cavity at intervals along a first direction to form a wheel chain, and the conveying wheels roll to convey the PCB board along a second direction, and the second direction is perpendicular to the first direction;

[0010] a transmission mechanism, the transmission mechanism being disposed in the transmission area and comprising a driving member and a shaft, the driving member being capable of driving the shaft to rotate, the shaft passing through the two shaft holes and the conveying wheel and being connected to the conveying wheel;

[0011] A first bearing is provided between the shaft and the conveying wheel.

[0012] As an optional technical solution for the PCB board drying device, the transmission mechanism also includes a driving wheel and a driven wheel, the driven wheel is sleeved on the shaft of the transmission area, the driven wheel and the driving wheel are engaged with each other, and the driving member can drive the driving wheel to rotate to drive the driven wheel to roll around the first direction.

[0013] As an optional technical solution for the PCB drying device, the axes of the driving wheel and the driven wheel are perpendicular to each other.

[0014] As an optional technical solution for the PCB drying device, the PCB drying device further includes a cleaning bar, which is sleeved on the shaft in the transmission area.

[0015] As an optional technical solution of the PCB drying device, the PCB drying device further includes a second bearing, which is arranged between the cup bar and the shaft.

[0016] As an optional technical solution for the PCB drying device, a plurality of wheel chains are provided along the second direction, the driven wheels correspond to the wheel chains one by one, and adjacent driven wheels are engaged with each other.

[0017] As an optional technical solution for the PCB drying device, the PCB drying device further includes a cover plate, the first partition plate is partially broken to form a gap, and the cover plate is selectively overlapped with the gap to seal or open the transmission cavity.

[0018] As an optional technical solution for the PCB drying device, a handle is provided on the cover.

[0019] As an optional technical solution for the PCB drying device, a collection box is provided at the bottom of the transmission cavity to collect dust particles.

[0020] As an optional technical solution for the PCB drying device, the partition components are in two groups, which are arranged on both sides of the box body along the first direction, and the conveying cavity is formed between the two partition components.

[0021] Beneficial effects of the utility model:

[0022] The present application discloses a PCB drying device, comprising a box body, a partition assembly, a conveying wheel, a transmission mechanism, and a first bearing. The partition assembly is disposed within the box body and includes a first partition plate and a second partition plate. The first partition plate divides the box body into a transmission chamber and a conveying chamber, and the second partition plate divides the transmission chamber into an air zone and a transmission zone. Both the first partition plate and the second partition plate are provided with an axial hole. A plurality of conveying wheels are arranged in the conveying chamber at intervals along a first direction to form a wheel chain. The conveying wheels roll to convey PCBs in a second direction perpendicular to the first direction. The transmission mechanism is disposed within the transmission zone and includes a driving member and a shaft. The driving member can drive the shaft to rotate. The shaft passes through two axial holes and the conveying wheel and is connected to the conveying wheel. The first bearing is disposed between the shaft and the conveying wheel. By providing the transmission chamber and the conveying chamber, the conveying wheel is separated from the transmission mechanism, reducing the temperature within the transmission chamber and preventing powder particles generated by the transmission mechanism from entering the conveying chamber. The first bearing is disposed between the conveying wheel and the shaft to prevent dry grinding of the conveying wheel and the shaft to generate powder particles, thereby improving the quality of the PCBs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0024] Figure 1 This is a schematic structural diagram of a PCB drying device provided by an embodiment of the present utility model;

[0025] Figure 2 It is a partial structural schematic diagram of a PCB board drying device provided by an embodiment of the utility model.

[0026] In the picture:

[0027] 10. Box body; 20. Partition assembly; 21. First partition; 22. Second partition; 30. Conveying wheel; 40. Transmission mechanism; 41. Shaft; 42. Driving wheel; 43. Driven wheel; 50. Cover; 51. Handle; 60. Cup bar; 70. Second bearing. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0029] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0032] The drying unit typically consists of a strong air drying mechanism and a hot air drying mechanism. The drying unit's air source is supplied by a blower, which filters air through fine filtration before supplying it to an air knife. The air knife directs the strong and hot air onto the PCBs, drying them. During the drying process, the PCBs are constantly conveyed by a plastic gear transmission. Because the drying unit is a high-temperature mechanism (the hot air drying section typically ranges from 80°C to 100°C), the high temperature within the cavity causes dry friction between the plastic gears. Over extended periods of operation, the plastic gears are susceptible to wear and tear, generating dust and particles. Since the drying unit is the last module in the PCB manufacturing process, with no subsequent cleaning modules, the dust and particles generated by the plastic gear transmission can affect the quality of the PCBs in some PCB processes with demanding cleanliness requirements.

[0033] In order to solve the above problems, this embodiment provides a PCB board drying device, see Figure 1 and Figure 2, including a box body 10, a partition assembly 20, a conveying wheel 30, a transmission mechanism 40 and a first bearing (not shown in the figure). The partition assembly 20 is arranged in the box body 10, and includes a first partition 21 and a second partition 22. The first partition 21 divides the box body 10 into a transmission chamber and a conveying chamber, and the second partition 22 divides the transmission chamber into an air separation area and a transmission area. The first partition 21 and the second partition 22 are both provided with shaft holes; there are multiple conveying wheels 30 and they are arranged in the conveying chamber at intervals along the first direction to form a wheel chain. The conveying wheel 30 rolls to convey the PCB board along the second direction, and the second direction is perpendicular to the first direction; the transmission mechanism 40 is arranged in the transmission area, and the transmission mechanism 40 includes a driving member (not shown in the figure) and a shaft 41. The driving member can drive the shaft 41 to rotate. The shaft 41 passes through the two shaft holes and the conveying wheel 30 and is connected to the conveying wheel 30; the first bearing is arranged between the shaft 41 and the conveying wheel 30. By setting up a transmission chamber and a conveying chamber, the conveying wheel 30 is separated from the transmission mechanism 40, thereby reducing the temperature in the transmission chamber. At the same time, the powder particles generated by the transmission mechanism 40 will not enter the conveying chamber. A first bearing is set between the conveying wheel 30 and the shaft 41 to avoid dry grinding of the conveying wheel 30 and the shaft 41 to generate powder particles, thereby improving the quality of the PCB board.

[0034] In this embodiment, two partition assemblies 20 are provided on both sides of the box body 10 along the first direction, and a conveying cavity is formed between the two partition assemblies 20. Specifically, a sleeve or a ball bearing can be used instead of the first bearing to reduce friction between the shaft 41 and the conveying wheel 30.

[0035] Furthermore, the transmission mechanism 40 also includes a driving wheel 42 and a driven wheel 43. The driven wheel 43 is mounted on the shaft 41 in the transmission area. The driven wheel 43 and the driving wheel 42 are meshed with each other (in other embodiments, a belt drive may be used). The driving member can drive the driving wheel 42 to rotate, thereby causing the driven wheel 43 to roll in a first direction. In this embodiment, the axes of the driving wheel 42 and the driven wheel 43 are perpendicular to each other. In other embodiments, the axes of the driving wheel 42 and the driven wheel 43 can be parallel to each other or connected to the shaft 41 by a driving member via a coupling, directly driving the shaft 41 to rotate.

[0036] Specifically, the driving member may be a rotary motor or a rotary cylinder. It should be noted that the rotary motor or the rotary cylinder is a very mature technology in the prior art and will not be described in detail here.

[0037] Furthermore, in order to prevent the shaft 41 from breaking and improve the rigidity and load-bearing capacity of the shaft 41, the PCB drying device further includes a cup-cleaning bar 60, which is sleeved on the shaft 41 in the transmission area. Specifically, the cup-cleaning bar 60 can also be arranged at intervals on the shaft 41 in the conveying area.

[0038] Furthermore, the PCB drying device further includes a second bearing 70, which is disposed between the sleeve bar 60 and the shaft 41. In other embodiments, a sleeve belt may be used instead of the second bearing 70 to reduce friction between the sleeve bar 60 and the shaft 41.

[0039] Furthermore, a plurality of sprockets are provided along the second direction, with each driven wheel 43 corresponding to each sprocket, and adjacent driven wheels 43 meshing with each other. The driving wheel 42 meshes with one of the driven wheels 43, driving all of the driven wheels 43 to rotate, thereby driving the conveying wheel 30 to roll. In other embodiments, the driven wheels 43 may be connected by a chain to rotate synchronously.

[0040] Furthermore, the PCB drying device includes a cover plate 50. The first partition plate 21 is partially broken to form a gap. The cover plate 50 selectively overlaps the gap to seal or open the transmission chamber. This gap allows personnel to observe the condition of the transmission mechanism 40 and promptly remove dust particles. When dust removal is not required, the cover plate 50 is closed to prevent dust particles from being blown away. Specifically, the cover plate 50 is provided with a handle 51. The handle 51 can be a pull ring or a pull rod. Furthermore, a collection box is provided at the bottom of the transmission chamber to collect dust particles for easy cleaning.

[0041] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A PCB board drying device, characterized in that: include: Box body (10); A partition assembly (20), the partition assembly (20) being arranged in the box body (10), comprising a first partition plate (21) and a second partition plate (22), the first partition plate (21) dividing the box body (10) into a transmission chamber and a conveying chamber, the second partition plate (22) dividing the transmission chamber into an air separation area and a transmission area, the first partition plate (21) and the second partition plate (22) both being provided with shaft holes; Conveying wheels (30), the conveying wheels (30) being multiple and spaced apart in a first direction within the conveying cavity to form a wheel chain, the conveying wheels (30) rolling to convey the PCB board along a second direction, the second direction being perpendicular to the first direction; a transmission mechanism (40), the transmission mechanism (40) being arranged in the transmission area, the transmission mechanism (40) comprising a driving member and a shaft (41), the driving member being capable of driving the shaft (41) to rotate, the shaft (41) passing through the two shaft holes and the conveying wheel (30) and being connected to the conveying wheel (30); A first bearing is provided between the shaft (41) and the conveying wheel (30).

2. The PCB board drying device according to claim 1, characterized in that: The transmission mechanism (40) further comprises a driving wheel (42) and a driven wheel (43), wherein the driven wheel (43) is sleeved on the shaft (41) of the transmission area, and the driven wheel (43) and the driving wheel (42) are meshed with each other, and the driving member can drive the driving wheel (42) to rotate, thereby driving the driven wheel (43) to roll around the first direction.

3. The PCB board drying device according to claim 2, characterized in that: The axes of the driving wheel (42) and the driven wheel (43) are perpendicular to each other.

4. The PCB board drying device according to claim 2, characterized in that: The PCB drying device further comprises a cleaning bar (60), and the cleaning bar (60) is sleeved on the shaft (41) of the transmission area.

5. The PCB board drying device according to claim 4, characterized in that: The PCB drying device further comprises a second bearing (70), wherein the second bearing (70) is arranged between the cup bar (60) and the shaft (41).

6. The PCB board drying device according to claim 5, characterized in that: A plurality of wheel chains are provided along the second direction, the driven wheels (43) correspond to the wheel chains one by one, and adjacent driven wheels (43) are meshed with each other.

7. The PCB board drying device according to any one of claims 1 to 6, characterized in that: The PCB drying device further comprises a cover plate (50), the first partition plate (21) is partially broken to form a gap, and the cover plate (50) is selectively overlapped with the gap to seal or open the transmission cavity.

8. The PCB board drying device according to claim 7, characterized in that: A handle (51) is provided on the cover plate (50).

9. The PCB drying device according to any one of claims 1 to 6, characterized in that: A collection box is provided at the bottom of the transmission cavity to collect dust particles.

10. The PCB drying device according to any one of claims 1 to 6, characterized in that: The partition components (20) are in two groups and are arranged on both sides of the box body (10) along the first direction, and the conveying cavity is formed between the two partition components (20).

Images