Drying device and etching machine

Abstract

The utility model discloses drying device and etching machine, wherein, drying device includes: drying cavity, drying main body, at least one exhaust duct and at least one bending waste pipe, drying main body sets up in drying cavity, to carry out drying to the target object in drying cavity, exhaust duct sets up at the position of drying cavity's lateral wall near top end, and one end of exhaust duct communicates with drying cavity, and the other end of exhaust duct communicates with outside, the other end of exhaust duct is obliquely set to the direction of top end away from drying cavity, and each bending waste pipe communicates with the other end of corresponding exhaust duct, wherein, the bending opening of bending waste pipe is set to the direction of top end away from drying cavity, and the height of bending point of bending waste pipe is lower than the height of the other end of corresponding exhaust duct. Thus through the exhaust duct of setting down obliquely and the setting of height difference reduce the waste liquid backflow situation to happen, guarantee the reliability of product.

Description

Technical Field

[0001] This invention applies to the technical field of plate drying, particularly drying equipment and etching machines. Background Technology

[0002] PCB, also known as printed circuit board, is a widely used and important electronic component. It serves as the support for electronic components and the carrier for their electrical connections.

[0003] Traditional wet processing lines are typically designed with a drying section to remove moisture from the product surface and prevent oxidation; at the same time, to maintain dryness inside the tank, an exhaust duct is designed at the top of the drying section to remove water vapor or chemical vapor.

[0004] Currently, the exhaust duct of the drying section is installed vertically at the top of the tank. When the high-temperature steam comes into contact with the cold air, it condenses and forms liquid, which can easily flow back and drip onto the products in the tank, causing oxidation and affecting the reliability, lifespan, and electrical performance of the products. Utility Model Content

[0005] This invention provides a drying device and an etching machine to solve the problem of condensate backflow in the exhaust duct of the drying section.

[0006] To solve the above-mentioned technical problems, this utility model provides a drying device, including: a drying chamber, a drying main body, at least one exhaust pipe, and at least one bent waste discharge pipe; the drying main body is disposed in the drying chamber to dry the target object in the drying chamber; the exhaust pipe is disposed on the side wall of the drying chamber near the top, one end of the exhaust pipe is connected to the drying chamber, and the other end of the exhaust pipe is connected to the outside; the other end of the exhaust pipe is inclined away from the top of the drying chamber; each bent waste discharge pipe is connected to the other end of the corresponding exhaust pipe, wherein the bend opening of the bent waste discharge pipe is oriented away from the top of the drying chamber, and the height of the bend point of the bent waste discharge pipe is lower than the height of the other end of the corresponding exhaust pipe.

[0007] The bent waste discharge pipe includes a first vertical section, a first horizontal section, a second vertical section, a second horizontal section, and a third vertical section connected in sequence. The first vertical section is also connected to the other end of the exhaust duct on the side away from the top of the drying chamber. The first horizontal section is perpendicularly connected to the first vertical section, and the second vertical section is perpendicularly connected to the first horizontal section, with the second vertical section and the first vertical section partially overlapping in the vertical direction. The second horizontal section is perpendicularly connected to the second vertical section, and the height of the second horizontal section is lower than the height of the other end of the exhaust duct. The third vertical section is perpendicularly connected to the second horizontal section, and the opening of the third vertical section away from the second horizontal section is set downwards.

[0008] The second horizontal segment includes either a straight segment or an S-shaped curved segment.

[0009] The bent waste discharge pipe includes a vertical section, a first inclined section, and a second inclined section connected in sequence; the vertical section is also connected to the other end of the exhaust pipe on the side away from the top of the drying chamber; the first inclined section is set towards the top of the drying chamber, and the second inclined section is set away from the top of the drying chamber; wherein, the height of the connection between the first inclined section and the second inclined section is lower than the height of the other end of the exhaust pipe.

[0010] A transverse section is provided between the first inclined section and the second inclined section; the transverse section includes a straight section or an S-shaped curved section.

[0011] The tilt angle ranges from 10 to 60 degrees.

[0012] The exhaust duct also includes an air outlet section, one end of which is connected to the other end of the exhaust duct, and the other end of which is positioned near the top of the drying chamber.

[0013] The drying unit includes multiple hot air blowers; these blowers are evenly arranged on opposite sides of the drying chamber to dry the target object in the middle area with hot air.

[0014] The drying device also includes a transmission mechanism. The drying chamber has an inlet and an outlet at opposite ends, and the transmission mechanism connects the inlet and outlet to transmit the target object within the drying chamber.

[0015] To solve the above-mentioned technical problems, this utility model provides an etching machine, which includes the drying device mentioned above.

[0016] To solve the above-mentioned technical problems, the drying device of this utility model includes: a drying chamber, a drying main body, at least one exhaust pipe, and at least one bent waste discharge pipe. The drying main body is disposed within the drying chamber to dry the target object within the drying chamber. The exhaust pipe is disposed on the side wall of the drying chamber near the top, with one end connected to the drying chamber and the other end connected to the outside. The other end of the exhaust pipe is inclined away from the top of the drying chamber. Each bent waste discharge pipe is connected to the other end of its corresponding exhaust pipe. The bend of the bent waste discharge pipe faces away from the top of the drying chamber, and the height of the bend point of the bent waste discharge pipe is lower than the height of the other end of the corresponding exhaust pipe. This reduces the occurrence of waste liquid backflow through the downwardly inclined exhaust pipe and reduces waste liquid backflow caused by negative pressure through the height difference, ensuring product reliability. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of the drying device provided by this utility model;

[0018] Figure 2 This is a schematic diagram of one embodiment of the bent waste discharge pipe;

[0019] Figure 3 This is a schematic diagram of another embodiment of the bent waste discharge pipe;

[0020] Figure 4 This is a structural diagram of another implementation of the bent waste discharge pipe;

[0021] Figure 5 This is a top view cross-sectional structural diagram of an embodiment of the drying device provided by this utility model. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] Please see Figure 1 , Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of the drying device provided by this utility model.

[0026] The drying device 100 includes: a drying chamber 110, a drying body 120, at least one exhaust duct 130, and at least one bent waste discharge pipe 140. The positions and quantities of the exhaust duct 130 and the bent waste discharge pipe 140 correspond one-to-one. The specific positions and quantities can be arbitrarily set based on actual needs and are not limited here.

[0027] The drying chamber 110 is a cavity structure with a sealed function. The drying body 120 is set inside the drying chamber 110 to dry the target object inside the drying chamber 110.

[0028] The exhaust duct 130 is located on the side wall of the drying chamber 110 near the top, specifically at any position on the side wall near the top of the drying chamber 110. One end of the exhaust duct 130 is connected to the drying chamber 110, and the other end is connected to the outside; the other end of the exhaust duct 130 is inclined away from the top of the drying chamber 110. One end of the exhaust duct 130 is flush with the side wall of the drying chamber 110.

[0029] Water vapor tends to accumulate on the side wall of the drying chamber 110 near the top. By placing the exhaust duct 130 at this location, the efficiency of water vapor discharge can be improved.

[0030] When water vapor enters the exhaust duct 130, even if it condenses into liquid, it will flow downwards due to the inclined design of the exhaust duct 130, reducing the possibility of it flowing back into the drying chamber 110. Furthermore, the end of the exhaust duct 130 that connects to the drying chamber 110 is located on the side wall, so even if it flows back, it will flow down the side wall, reducing the possibility of it dripping onto the product and ensuring the reliability of the product.

[0031] In a specific application scenario, a fan can be installed inside the exhaust duct 130 to increase the exhaust efficiency of the exhaust duct 130 and speed up the discharge of water vapor.

[0032] Each bent waste discharge pipe 140 is connected to the other end of its corresponding exhaust pipe 130 to discharge condensed waste liquid. The bend opening of the bent waste discharge pipe 140 faces away from the top of the drying chamber 110, and the height of the bend point of the waste discharge pipe 140 is lower than the height of the other end of the corresponding exhaust pipe 130. This arrangement, because the bend point height is lower than the connection end of the exhaust pipe 130, creates a non-full pipe flow between the bend point and the exhaust end. When a negative pressure is generated at the exhaust end, gas is preferentially drawn in from the bend point opening, interrupting the liquid continuity required for siphoning and preventing backflow. Furthermore, the lower bend point height compared to the connection end of the exhaust pipe 130 also creates an inclined liquid seal. This structure creates a non-full pipe flow through the height difference, combining the liquid seal static pressure and air gap blocking mechanisms to reduce waste liquid backflow.

[0033] With the above structure, the drying device of this embodiment includes: a drying chamber, a drying main body, at least one exhaust duct, and at least one bent waste discharge pipe. The drying main body is disposed within the drying chamber to dry the target object within the drying chamber. The exhaust duct is disposed on the side wall of the drying chamber near the top. One end of the exhaust duct is connected to the drying chamber, and the other end is connected to the outside. The other end of the exhaust duct is inclined away from the top of the drying chamber. Each bent waste discharge pipe is connected to the other end of its corresponding exhaust duct. The bend of the bent waste discharge pipe faces away from the top of the drying chamber, and the height of the bend point of the bent waste discharge pipe is lower than the height of the other end of the corresponding exhaust duct. This reduces the occurrence of waste liquid backflow by using the downwardly inclined exhaust duct and reduces waste liquid backflow caused by negative pressure by using the height difference, thus ensuring product reliability.

[0034] Please see Figure 2 , Figure 2 This is a schematic diagram of one embodiment of the bent waste discharge pipe.

[0035] In some embodiments, the bent waste discharge pipe 140 includes a first vertical section 141, a first horizontal section 142, a second vertical section 143, a second horizontal section 144, and a third vertical section 145 connected in sequence.

[0036] The first vertical section 141 is connected to the other end of the exhaust pipe 130 on the side away from the top of the drying chamber 110, so that the waste liquid in the exhaust pipe 130 flows into the first vertical section 141 by means of gravity.

[0037] The first horizontal segment 142 is perpendicularly connected to the first vertical segment 141, and the second vertical segment 143 is perpendicularly connected to the first horizontal segment 142. The second vertical segment 143 and the first vertical segment 141 are partially overlapped in the vertical direction, that is, the second vertical segment 143 extends toward the top of the drying chamber 110.

[0038] The second horizontal section 144 is vertically connected to the second vertical section 143, and the height of the second horizontal section 144 is lower than the height of the other end of the exhaust pipe 130, so as to create a height difference to create non-full pipe flow. Combined with the dual mechanism of liquid seal static pressure and air gap blocking, the occurrence of waste liquid backflow is reduced.

[0039] The third vertical section 145 is vertically connected to the second horizontal section 144, and the opening of the third vertical section 145 is set downward away from the second horizontal section 144 so that the waste liquid is eventually discharged by gravity.

[0040] The aforementioned bent waste discharge pipe 140 structure can both guide waste liquid into the bent waste discharge pipe 140 and reduce the occurrence of waste liquid backflow caused by negative pressure through the height difference, thus ensuring the reliability of the product.

[0041] In some embodiments, the second horizontal segment 144 may include a straight segment or an S-shaped curved segment, which is not limited herein.

[0042] Please see Figure 3 , Figure 3 This is a schematic diagram of another implementation of the bent waste discharge pipe.

[0043] The bent waste discharge pipe 240 includes a vertical section 241, a first inclined section 242, and a second inclined section 243 connected in sequence.

[0044] The vertical section 241 is also connected to the other end of the exhaust duct 130 on the side away from the top of the drying chamber 110, so that the waste liquid in the exhaust duct 130 flows into the vertical section 241 by means of gravity.

[0045] The first inclined section 242 is inclined towards the top of the drying chamber 110, and the second inclined section 243 is inclined away from the top of the drying chamber 110, so that the waste liquid is eventually discharged by gravity.

[0046] The height of the connection between the first inclined section 242 and the second inclined section 243 is lower than the height of the other end of the exhaust duct 130, so as to create a height difference to create non-full pipe flow. Combined with the dual mechanism of liquid seal static pressure and air gap blocking, the occurrence of waste liquid backflow is reduced.

[0047] The aforementioned bent waste discharge pipe 240 structure can both guide waste liquid into the bent waste discharge pipe 240 and reduce the occurrence of waste liquid backflow caused by negative pressure through the height difference, thus ensuring the reliability of the product.

[0048] Please see Figure 4 , Figure 4 This is a structural diagram of another implementation method of the bent waste discharge pipe.

[0049] The bent waste discharge pipe 340 includes a vertical section 341, a first inclined section 342, a horizontal section 344, and a second inclined section 343 connected in sequence.

[0050] The vertical section 341 is also connected to the other end of the exhaust duct 330 on the side away from the top of the drying chamber 110, so that the waste liquid in the exhaust duct 130 flows into the vertical section 341 by means of gravity.

[0051] The first inclined section 342 is inclined towards the top of the drying chamber 110, and the second inclined section 343 is inclined away from the top of the drying chamber 110, so that the waste liquid is eventually discharged by gravity.

[0052] The height of the connection point of the transverse section 344 is lower than the height of the other end of the exhaust duct 130 to create a height difference and induce non-full pipe flow. This, combined with the dual mechanisms of liquid seal static pressure and air gap blocking, reduces the occurrence of waste liquid backflow. The transverse section 344 includes a straight section or an S-shaped bend.

[0053] The aforementioned bent waste discharge pipe 340 structure can both guide waste liquid into the bent waste discharge pipe 340 and reduce the occurrence of waste liquid backflow caused by negative pressure through the height difference, thus ensuring the reliability of the product.

[0054] Please read back Figure 1 In some embodiments, the inclination angle A of the exhaust duct 130 ranges from 10 to 60 degrees, specifically 10, 15, 20, 24, 30, 35, 38, 40, 45, 55, or 60 degrees. Preferably, it is 15 degrees. Within this inclination range, the exhaust duct 130 can both prevent waste liquid backflow and improve the structural stability of the exhaust duct 130.

[0055] In some embodiments, the exhaust duct 130 is further provided with an exhaust section 150, one end of which is connected to the other end of the exhaust duct 130, and the other end of the exhaust section 150 is positioned near the top of the drying chamber 110 to discharge exhaust gas.

[0056] Please see Figure 5 , Figure 5 This is a top view cross-sectional structural diagram of an embodiment of the drying device provided by this utility model.

[0057] In some embodiments, the drying body 120 includes a plurality of hot air blowers 121; the plurality of hot air blowers 121 are evenly arranged on opposite sides of the drying chamber 110 to perform hot air drying on the target object in the middle area.

[0058] Specifically, the hot air blower 121 dries the moisture on the target object, causing it to evaporate into water vapor, which is then discharged through the exhaust duct 130.

[0059] In some embodiments, the drying apparatus 100 further includes a conveying mechanism 160. An inlet 111 and an outlet 112 are respectively provided at opposite ends of the drying chamber 110. The conveying mechanism 160 connects the inlet 111 and the outlet 112 to convey the target object within the drying chamber 110. The conveying mechanism 160 may include structures such as conveying rollers or conveying slides, which are not limited here.

[0060] The target object is transferred from the inlet 111 into the drying chamber 110 by the transfer mechanism 160, dried by the hot air blower 121, and then transferred out from the outlet 112 by the transfer mechanism 160.

[0061] Based on the same concept, this application also provides an etching machine that includes the drying apparatus 100 of any of the above embodiments, thereby reducing the risk of condensed liquid dripping back onto the printed circuit board during the post-etching drying process, reducing the resulting oxidation and scrap problems, and improving the yield of the printed circuit board.

[0062] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A drying apparatus, characterized in that, The drying device includes: Drying chamber; A drying body is disposed within the drying chamber to dry a target object within the drying chamber; At least one exhaust duct is provided, which is located on the side wall of the drying chamber near the top. One end of the exhaust duct is connected to the drying chamber, and the other end is connected to the outside. The other end of the exhaust duct is inclined away from the top of the drying chamber. At least one bent waste discharge pipe is provided, and each bent waste discharge pipe is connected to the other end of the corresponding exhaust pipe. The bent opening of the waste discharge pipe is oriented away from the top of the drying chamber, and the height of the bend point of the waste discharge pipe is lower than the height of the other end of the corresponding exhaust pipe.

2. The drying apparatus according to claim 1, characterized in that, The bent waste discharge pipe includes a first vertical section, a first horizontal section, a second vertical section, a second horizontal section, and a third vertical section connected in sequence. The first vertical section is also connected to the other end of the exhaust pipe on the side away from the top of the drying chamber; The first horizontal segment is perpendicularly connected to the first vertical segment, the second vertical segment is perpendicularly connected to the first horizontal segment, and the second vertical segment and the first vertical segment partially overlap in the vertical direction; The second horizontal segment is perpendicularly connected to the second vertical segment, and the height of the second horizontal segment is lower than the height of the other end of the exhaust duct; The third vertical segment is perpendicularly connected to the second horizontal segment, and the opening of the third vertical segment is positioned downwards away from the second horizontal segment.

3. The drying apparatus according to claim 2, characterized in that, The second horizontal segment includes a straight segment or an S-shaped curved segment.

4. The drying apparatus according to claim 1, characterized in that, The bent waste discharge pipe includes a vertical section, a first inclined section and a second inclined section connected in sequence; The vertical section is also connected to the other end of the exhaust duct on the side away from the top of the drying chamber. The first inclined section is inclined toward the top of the drying chamber, and the second inclined section is inclined away from the top of the drying chamber; wherein the height of the connection between the first inclined section and the second inclined section is lower than the height of the other end of the exhaust duct.

5. The drying apparatus according to claim 4, characterized in that, A transverse segment is provided between the first inclined segment and the second inclined segment; The transverse segment includes a straight segment or an S-shaped curved segment.

6. The drying apparatus according to claim 1, characterized in that, The inclination angle of the exhaust duct ranges from 10 to 60 degrees.

7. The drying apparatus according to claim 1, characterized in that, The exhaust duct is also provided with an air outlet section. One end of the air outlet section is connected to the other end of the exhaust duct, and the other end of the air outlet section is positioned near the top of the drying chamber.

8. The drying apparatus according to claim 1, characterized in that, The drying unit includes multiple hot air blowers; Multiple hot air blowers are evenly arranged on opposite sides of the drying chamber to dry the target object in the middle area with hot air.

9. The drying apparatus according to claim 1, characterized in that, The drying device also includes a transmission mechanism. The drying chamber has an inlet and an outlet at opposite ends, and the transmission mechanism connects the inlet and the outlet to transmit the target object within the drying chamber.

10. An etching machine, characterized in that, The etching machine includes the drying apparatus according to any one of claims 1-9.

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