Flexible circuit board drying device and coating anti-oxidation process

Abstract

The present invention provides a flexible circuit board drying device and a coating anti-oxidation process, belonging to the technical field of flexible circuit board production. A flexible circuit board drying device includes an oven body with a discharge port and a feed port, a water storage tank, a water squeezing unit and a drying unit. The water storage tank is fixedly connected to the rear side of the oven body and communicated with the feed port; the water squeezing unit is arranged in the water storage tank, the water squeezing unit includes a water squeezing component and a driving component connected to the water squeezing component, the water squeezing component includes two upper and lower corresponding sponge rollers, the two upper and lower corresponding sponge rollers are used for interference fit with the flexible circuit board, and the driving component is used to drive the upper and lower corresponding two sponge rollers to rotate in opposite directions; the drying unit is arranged in the oven body and is used to remove moisture from the surface of the flexible circuit board. The present invention improves the drying effect.

Description

Technical Field

[0001] The invention belongs to the technical field of flexible circuit board production, and specifically relates to a flexible circuit board drying device and a coating anti-oxidation process. Background Art

[0002] In the electronics manufacturing industry, flexible circuit boards are widely used in various electronic devices because of their bendability, lightness, and ability to conform to complex surfaces. However, flexible circuit boards are easily affected by the external environment during use, especially oxidation problems, which poses a serious threat to their performance and lifespan.

[0003] OSP (Organic Solderability Preservatives) is a commonly used surface treatment process for flexible circuit boards. The flexible circuit board is immersed in a solution to form an anti-oxidation layer on the surface of the flexible circuit board to protect the copper surface from oxidation.

[0004] The flexible circuit board needs to be dried after completing the anti-oxidation process. Most existing preparation processes take out the flexible circuit board from the solution and then directly heat and dry it. However, this method easily causes a large amount of moisture to remain on the surface of the flexible circuit board, resulting in insufficient drying. Summary of the invention

[0005] The embodiments of the present invention provide a flexible circuit board drying device and a coating anti-oxidation process, aiming to solve the technical problem of insufficient drying.

[0006] In a first aspect, an embodiment of the present invention provides a flexible circuit board drying device, including an oven body, wherein a discharge port and a feed port are respectively provided on the front and rear sides of the oven body, and further comprising:

[0007] A water storage tank, fixedly connected to the rear side of the oven body and connected to the feed inlet;

[0008] A water squeezing unit is arranged in the water storage tank, the water squeezing unit includes a water squeezing component and a driving component connected to the water squeezing component, the water squeezing component is sequentially spaced and distributed in a plurality of groups along the front-to-back direction, the driving component is arranged in a one-to-one correspondence with the water squeezing component, the water squeezing component includes two upper and lower corresponding sponge rollers, the two upper and lower corresponding sponge rollers are used for interference fit with the flexible circuit board, and the driving component is used for driving the upper and lower corresponding two sponge rollers to rotate in opposite directions; and

[0009] The drying unit is arranged in the oven body and is used to remove moisture from the surface of the flexible circuit board.

[0010] In combination with the first aspect, in a possible implementation, the left and right side plates of the water storage tank are respectively provided with through avoidance grooves, the avoidance grooves extend in the up-down direction, the sponge roller has a transmission shaft passing through the avoidance grooves, and an adjustment unit is provided on the outer side of the avoidance grooves, and the adjustment unit includes:

[0011] There are two bases, the two bases correspond to the transmission shafts one by one and are rotatably connected, and the bases are slidably connected to the outer wall of the water tank along the up and down directions; and

[0012] The adjusting member is used for adjusting the distance between the two bases.

[0013] In combination with the first aspect, in a possible implementation manner, the driving component includes:

[0014] A movable seat is slidably connected to the outer wall of the water tank in a front-to-rear direction and has a first state of movement relative to the water tank and a second state of rest relative to the water tank;

[0015] A driving wheel, rotatably connected to the moving seat around its own central axis;

[0016] A driving member, drivingly connected to the driving wheel;

[0017] A first driven wheel, fixedly mounted on the outer periphery of the transmission shaft located above;

[0018] A reversing roller, which rotates around its own central axis and is connected to the base below;

[0019] A second driven wheel is fixedly arranged on the outer periphery of the reversing roller;

[0020] A transmission belt is wound around the first driven wheel, the second driven wheel and the driving wheel;

[0021] A first reversing gear is fixedly mounted on the outer periphery of the reversing roller; and

[0022] A second reversing gear is fixedly mounted on the outer periphery of the transmission shaft below;

[0023] When the distance between the two upper and lower corresponding bases changes, the movable base is in the first state, and when the transmission belt is in a taut state, the movable base is in the second state.

[0024] In combination with the first aspect, in a possible implementation manner, the movable seat is detachably fixed to the outer wall of the water storage tank;

[0025] or

[0026] A fixed seat is fixedly provided on the outer wall of the water tank, a one-way screw is threadedly connected inside the fixed seat, the one-way screw is arranged along the front-back direction, the one-way screw is fixedly connected to the movable seat, a threaded sleeve is threadedly connected to the outer periphery of the one-way screw, and the threaded sleeve is rotatably connected to the fixed seat around its own central axis.

[0027] In combination with the first aspect, in a possible implementation, a storage cavity is provided in the top wall and the bottom wall of the avoidance groove, a stopper is provided in the storage cavity for sliding along the up and down directions, the transmission shaft passes through the stopper and is rotatably connected to the stopper, and an accordion cover is fixed between the upper and lower stoppers.

[0028] In combination with the first aspect, in a possible implementation, the adjusting member is a bidirectional lead screw, which includes a smooth rod and threaded rods respectively fixed to the top and bottom ends of the smooth rod, the smooth rod rotates around its own central axis and is connected to the outer wall of the water tank, the threads of the two threaded rods have opposite rotation directions, and the threaded rods are screwed to the base.

[0029] In combination with the first aspect, in a possible implementation, the adjusting member is a telescopic member that can be extended and retracted in the up and down directions, and the adjusting member has a fixed section fixed to the outer wall of the water tank and movable sections respectively arranged at the top and bottom ends of the fixed section, and one end of the movable section away from the fixed section is fixed to the base.

[0030] In combination with the first aspect, in a possible implementation manner, the drying unit includes:

[0031] A strong wind tube is fixedly arranged in the oven body at one side close to the feed port, and a plurality of the strong wind tubes are provided, and the plurality of the strong wind tubes are arranged at intervals along the front-to-back direction, and the strong wind tubes are used to blow away the water droplets remaining on the surface of the flexible circuit board; and

[0032] A hot air cylinder is fixedly connected to the inner wall of the oven body. The hot air cylinder is located between the strong air cylinder and the discharge port, and a plurality of hot air cylinders are arranged at intervals along the front-to-back direction. The hot air cylinder is used to send hot air to the surface of the flexible circuit board.

[0033] Compared with the prior art, the flexible circuit board drying device provided by the present invention has the following advantages:

[0034] When the flexible circuit board passes between the two corresponding sponge rollers above and below, the sponge rollers absorb moisture on the surface of the flexible circuit board, thereby reducing the accumulation of moisture on the surface of the flexible circuit board, so that the drying unit does not need to disperse heat to evaporate the moisture accumulated on the surface of the flexible circuit board, thereby allowing the flexible circuit board to be fully dried; at the same time, the two sponge rollers turn in opposite directions, so that the driving forces on the top and bottom surfaces of the flexible circuit board are in the same direction, and the setting of the sponge rollers will not interfere with the advancement of the flexible circuit board.

[0035] In a second aspect, an embodiment of the present invention further provides a flexible circuit board coating anti-oxidation process, comprising the following steps:

[0036] S10, remove dust and impurities on the surface of the flexible circuit board;

[0037] S20, processing the flexible circuit board after removing dust and impurities, and removing the oxide layer on the surface of the board;

[0038] S30, immersing the flexible circuit board after the oxide layer is removed into a chemical solution, so that an anti-oxidation layer is formed on the surface of the flexible circuit board;

[0039] S40, using a drying device to dry the flexible circuit board.

[0040] In combination with the second aspect, in a possible implementation, in the step S30, the temperature of the chemical solution is 25-35°C.

[0041] Compared with the prior art, the flexible circuit board coating anti-oxidation process provided by the present invention has the following advantages:

[0042] Before coating the anti-oxidation layer, the flexible circuit board is surface treated to remove dust, impurities and the oxide layer, thereby reducing the impact on the formation of the anti-oxidation layer and improving the quality of the anti-oxidation layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the structure of a flexible circuit board drying device according to an embodiment of the present invention;

[0044] Figure 2 for Figure 1 A partial enlarged schematic diagram of part A;

[0045] Figure 3 A partial cross-sectional view showing the structure of the avoidance groove provided in an embodiment of the present invention;

[0046] Figure 4 A schematic diagram of the structure of an adjusting member provided in an embodiment of the present invention;

[0047] Figure 5 A schematic diagram of the structure of a first guide block provided in an embodiment of the present invention;

[0048] Figure 6 A schematic diagram of the structure of another adjusting member provided in an embodiment of the present invention;

[0049] Figure 7 A schematic diagram of the structure of a second guide block provided in an embodiment of the present invention;

[0050] Figure 8A structural schematic diagram of a method for changing the position of a moving seat is provided for an embodiment of the present invention.

[0051] Description of reference numerals:

[0052] 10. Oven body;

[0053] 20, water storage tank; 201, avoidance groove; 202, first guide groove; 203, first guide rod; 204, second guide groove; 205, second guide rod; 206, fixed seat; 2061, one-way lead screw; 2062, threaded sleeve; 207, storage chamber; 2071, stopper; 208, accordion cover; 209, connecting seat;

[0054] 30, water squeezing unit; 301, sponge roller; 3011, transmission shaft; 302, moving seat; 3021, second guide block; 303, driving wheel; 304, first driven wheel; 305, reversing roller; 306, second driven wheel; 307, transmission belt; 308, first reversing gear; 309, second reversing gear;

[0055] 40. Drying unit; 401. Strong air cylinder; 402. Hot air cylinder;

[0056] 50. Adjustment unit; 501. Base; 5011. First guide block; 502. Adjustment member; 5021. Polish rod; 5022. Threaded rod; 5023. Fixed section; 5024. Movable section. DETAILED DESCRIPTION

[0057] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0058] Please also read Figures 1 to 8, the flexible circuit board drying device of the present invention is described. A flexible circuit board drying device includes an oven body 10, wherein the oven body 10 is provided with a discharge port and a feed port on the front and rear sides respectively, and further includes a water storage tank 20, a water squeezing unit 30, and a drying unit 40. The water storage tank 20 is fixedly connected to the rear side of the oven body 10 and is connected to the feed port; the water squeezing unit 30 is arranged in the water storage tank 20, and the water squeezing unit 30 includes a water squeezing component and a driving component connected to the water squeezing component. The water squeezing components are sequentially spaced and distributed in a plurality of groups along the front and rear directions, and the driving component is arranged one by one with the water squeezing component. The water squeezing component includes two upper and lower corresponding sponge rollers 301, which rotate around their own midline axis, and the two upper and lower corresponding sponge rollers 301 are used for interference fit with the flexible circuit board, and the driving component is used for driving the upper and lower corresponding two sponge rollers 301 to rotate in opposite directions; the drying unit 40 is arranged in the oven body 10, and is used to remove moisture from the surface of the flexible circuit board.

[0059] It should be noted that the flexible circuit board is a coil, and the forward direction of the flexible circuit board is forward.

[0060] Compared with the prior art, the flexible circuit board drying device provided in this embodiment has the following advantages. When the flexible circuit board passes between two corresponding sponge rollers 301 above and below, the sponge rollers 301 absorb the moisture on the surface of the flexible circuit board, thereby reducing the accumulation of moisture on the surface of the flexible circuit board, so that the drying unit 40 does not need to disperse heat to evaporate the moisture accumulated on the surface of the flexible circuit board, thereby allowing the flexible circuit board to be fully dried; at the same time, the two sponge rollers 301 turn in opposite directions, so that the directions of the driving forces on the top and bottom surfaces of the flexible circuit board are the same, and the setting of the sponge rollers 301 will not interfere with the advancement of the flexible circuit board.

[0061] In some embodiments, see Figures 2 to 5 The left and right side plates of the water tank 20 are respectively provided with through avoidance grooves 201, which extend in the up-down direction. The sponge roller 301 has a transmission shaft 3011 passing through the avoidance groove 201. An adjustment unit 50 is provided on the outer side of the avoidance groove 201. The adjustment unit 50 includes two bases 501 and an adjustment member 502. The two bases 501 correspond to the transmission shaft 3011 one by one and are rotatably connected. The bases 501 are slidably connected to the outer wall of the water tank 20 in the up-down direction; the adjustment member 502 is used to adjust the distance between the two bases 501.

[0062] As a specific implementation of the adjusting member 502, the adjusting member 502 is a bidirectional lead screw, which includes a smooth rod 5021 and threaded rods 5022 respectively fixed at the top and bottom ends of the smooth rod 5021. The smooth rod 5021 rotates around its own central axis and is connected to the outer wall of the water tank 20. The threads of the two threaded rods 5022 have opposite rotation directions, and the threaded rods 5022 are screwed to the base 501.

[0063] Specifically, the outer wall of the water tank 20 is provided with a first guide groove 202 corresponding to the base 501 in a one-to-one manner along the up-down direction, and the base 501 is fixedly connected to the side of the water tank 20 with a first guide block 5011 slidably adapted to the first guide groove 202, and a first guide rod 203 arranged in the up-down direction is fixed in the first guide groove 202, and the first guide rod 203 passes through the first guide block 5011 and the two are slidably adapted.

[0064] Specifically, a connecting seat 209 is fixedly provided on the outer wall of the water storage tank 20, and the polished rod 5021 is rotatably connected to the connecting seat 209 around its own central axis.

[0065] When the thickness of the flexible circuit board changes, the staff needs to adjust the distance between the two sponge rollers 301 by rotating the light rod 5021. The rotation of the light rod 5021 drives the threaded rod 5022 to rotate, and the rotation of the threaded rod 5022 causes the two bases 501 to move toward or away from each other in the up-down direction; during the movement of the base 501, the first guide block 5011 moves up-down along the first guide groove 202 and the first guide rod 203, so that the base 501 is guided by the first guide block 5011, so that the base 501 can only move in the up-down direction.

[0066] As another embodiment of the adjusting member 502, the adjusting member 502 is a telescopic member that is telescopic in the up and down directions. The adjusting member 502 has a fixed section 5023 fixedly connected to the outer wall of the water tank 20 and a movable section 5024 respectively arranged at the top and bottom ends of the fixed section 5023. The end of the movable section 5024 away from the fixed section 5023 is fixedly connected to the base 501.

[0067] Specifically, a connecting seat 209 is fixedly provided on the outer wall of the water storage tank 20 , and the fixing section 5023 is fixedly connected to the connecting seat 209 .

[0068] It should be noted that the adjusting member 502 may be a dual-axis hydraulic cylinder.

[0069] When the thickness of the flexible circuit board changes, the staff needs to adjust the distance between the two sponge rollers 301 by starting the adjusting member 502. After the adjusting member 502 is started, the two bases 501 move toward or away from each other by extending and retracting the movable end.

[0070] In some embodiments, see Figure 2 and Figure 7The driving assembly includes a moving seat 302, a driving wheel 303, a driving member (not shown), a first driven wheel 304, a reversing roller 305, a second driven wheel 306, a transmission belt 307, a first reversing gear 308, and a second reversing gear 309; the moving seat 302 is slidably connected to the outer wall of the water tank 20 along the front-back direction, and has a first state of movement relative to the water tank 20 and a second state of rest relative to the water tank 20; the driving wheel 303 is connected to the moving seat 302 by rotating around its own central axis; the driving The first driven wheel 304 is fixedly arranged on the outer periphery of the transmission shaft 3011 located above; the reversing roller 305 is connected to the base 501 below and rotates around its own central axis; the second driven wheel 306 is fixedly arranged on the outer periphery of the reversing roller 305; the transmission belt 307 is wound around the first driven wheel 304, the second driven wheel 306 and the driving wheel 303; the first reversing gear 308 is fixedly arranged on the outer periphery of the reversing roller 305; the second reversing gear 309 is fixedly arranged on the outer periphery of the transmission shaft 3011 located below.

[0071] When the distance between the two upper and lower corresponding bases 501 changes, the movable base 302 is in the first state, and when the transmission belt 307 is in a tight state, the movable base 302 is in the second state.

[0072] Specifically, the outer wall of the water tank 20 is provided with a second guide groove 204 corresponding to the movable seat 302 in a one-to-one manner along the front-to-back direction, and the movable seat 302 is fixedly connected to the side of the water tank 20 with a second guide block 3021 slidably adapted to the second guide groove 204, and a second guide rod 205 is fixedly provided in the second guide groove 204 along the front-to-back direction, and the second guide rod 205 passes through the second guide block 3021 and the two are slidably adapted.

[0073] Specifically, the movable seat 302 is detachably connected to the outer wall of the water tank 20 .

[0074] It should be noted that the movable seat 302 can be fixed to the outer wall of the water tank 20 by bolts, the driving member can be a motor, the driving member is fixedly installed on the movable seat 302, and the output shaft of the driving member is fixedly connected to the driving wheel 303.

[0075] After the distance between the two corresponding sponge rollers 301 changes, the position of the movable seat 302 needs to be adjusted to keep the transmission belt 307 in a taut state. After the bolts are removed, the movable seat 302 is in a first state, and the movable seat 302 can slide along the second guide groove 204 and the second guide rod 205; after the movable seat 302 is fixed to the water storage tank 20 by bolts, the movable seat 302 is in a second state.

[0076] After the driving member is started, it drives the active wheel 303 to rotate, and the active wheel 303 drives the first driven wheel 304 and the second driven wheel 306 to rotate through the transmission belt 307. The rotation of the first driven wheel 304 drives the transmission shaft 3011 located above to rotate, and the rotation of the second driven wheel 306 drives the reversing roller 305 to rotate. The reversing roller 305 drives the first reversing gear 308 to rotate, and the first reversing gear 308 drives the second reversing gear 309 to rotate. The second reversing gear 309 drives the transmission shaft 3011 located below to rotate; the first reversing gear 308 and the second reversing gear 309 make the upper and lower transmission shafts 3011 rotate in opposite directions, so that the upper and lower sponge rollers 301 rotate in opposite directions.

[0077] In some embodiments, see Figure 2 , Figure 7 and Figure 8 The driving assembly includes a moving seat 302, a driving wheel 303, a driving member (not shown), a first driven wheel 304, a reversing roller 305, a second driven wheel 306, a transmission belt 307, a first reversing gear 308, and a second reversing gear 309; the moving seat 302 is slidably connected to the outer wall of the water tank 20 along the front-back direction, and has a first state of movement relative to the water tank 20 and a second state of rest relative to the water tank 20; the driving wheel 303 is connected to the moving seat 302 by rotating around its own central axis; the driving The first driven wheel 304 is fixedly arranged on the outer periphery of the transmission shaft 3011 located above; the reversing roller 305 is connected to the base 501 below and rotates around its own central axis; the second driven wheel 306 is fixedly arranged on the outer periphery of the reversing roller 305; the transmission belt 307 is wound around the first driven wheel 304, the second driven wheel 306 and the driving wheel 303; the first reversing gear 308 is fixedly arranged on the outer periphery of the reversing roller 305; the second reversing gear 309 is fixedly arranged on the outer periphery of the transmission shaft 3011 located below.

[0078] When the distance between the two upper and lower corresponding bases 501 changes, the movable base 302 is in the first state, and when the transmission belt 307 is in a tight state, the movable base 302 is in the second state.

[0079] Specifically, the outer wall of the water tank 20 is provided with a second guide groove 204 corresponding to the movable seat 302 in a one-to-one manner along the front-to-back direction, and the movable seat 302 is fixedly connected to the side of the water tank 20 with a second guide block 3021 slidably adapted to the second guide groove 204, and a second guide rod 205 is fixedly provided in the second guide groove 204 along the front-to-back direction, and the second guide rod 205 passes through the second guide block 3021 and the two are slidably adapted.

[0080] Specifically, a fixed seat 206 is fixedly provided on the outer wall of the water tank 20, a one-way screw 2061 is threadedly connected inside the fixed seat 206, the one-way screw 2061 is arranged along the front-to-back direction, the one-way screw 2061 is fixedly connected to the movable seat 302, a threaded sleeve 2062 is threadedly connected to the outer periphery of the one-way screw 2061, and the threaded sleeve 2062 is connected to the fixed seat 206 by rotation around its own central axis.

[0081] After the distance between the two corresponding sponge rollers 301 changes, the position of the movable seat 302 needs to be adjusted to keep the transmission belt 307 in a taut state. During the rotation of the threaded sleeve 2062, the movable seat 302 is in a first state, and the movable seat 302 can slide along the second guide groove 204 and the second guide rod 205; when the threaded sleeve 2062 is in a stationary state, the movable seat 302 is in a second state.

[0082] In some embodiments, see Figure 3 A storage cavity 207 is provided on the top wall and the bottom wall of the avoidance groove 201. A stopper 2071 is provided in the storage cavity 207 for sliding along the up and down directions. The transmission shaft 3011 passes through the stopper 2071 and is rotatably connected to the stopper 2071. An accordion cover 208 is fixed between the upper and lower stoppers 2071.

[0083] When the distance between the upper and lower transmission shafts 3011 changes, the distance between the upper and lower transmission shafts 3011 increases, so that the two transmission shafts 3011 respectively receive the two blocks 2071 into the upper and lower receiving chambers 207, and the accordion cover 208 is stretched; when the distance between the upper and lower transmission shafts 3011 decreases, the two transmission shafts 3011 respectively extend the two blocks 2071 out of the upper and lower receiving chambers 207, and the accordion cover 208 is compressed. Thus, the avoidance groove 201 is always in a closed state through the upper and lower blocks 2071 and the accordion cover 208, so as to prevent water from splashing out of the water storage tank 20 through the avoidance groove 201 during the squeezing process.

[0084] In some embodiments, see Figure 1 The drying unit 40 includes a strong air cylinder 401 and a hot air cylinder 402. The strong air cylinder 401 is fixedly arranged on one side of the oven body 10 near the feed port. There are multiple strong air cylinders 401, which are arranged at intervals along the front-to-back direction. The strong air cylinder 401 is used to blow off the water droplets remaining on the surface of the flexible circuit board; the hot air cylinder 402 is fixedly connected to the inner wall of the oven body 10, the hot air cylinder 402 is located between the strong air cylinder 401 and the feed port, and there are multiple strong air cylinders 401 arranged at intervals along the front-to-back direction. The hot air cylinder 402 is used to send hot air to the surface of the flexible circuit board.

[0085] After the sponge roller 301 squeezes out the water, the water droplets remaining on the surface of the flexible circuit board are blown off by the strong air cylinder 401, thereby further reducing the residual water on the surface of the flexible circuit board and making the hot air cylinder 402 more efficient in delivering hot air for drying.

[0086] Based on the same inventive concept, the embodiment of the present application also provides a flexible circuit board coating anti-oxidation process, comprising the following steps:

[0087] S10, remove dust and impurities on the surface of the flexible circuit board;

[0088] S20, processing the flexible circuit board from which dust and impurities have been removed, and removing the oxide layer on the surface thereof;

[0089] S30, immersing the flexible circuit board after the oxide layer is removed into a chemical solution, so that an anti-oxidation layer is formed on the surface of the flexible circuit board;

[0090] S40, using a drying device to dry the flexible circuit board.

[0091] Compared with the prior art, the flexible circuit board coating anti-oxidation process provided by the present invention has the following advantages:

[0092] Before coating the anti-oxidation layer, the flexible circuit board is surface treated to remove dust, impurities and the oxide layer, thereby reducing the impact on the formation of the anti-oxidation layer and improving the quality of the anti-oxidation layer.

[0093] In some embodiments, step S10 removes dust and impurities on the surface of the flexible circuit board through two processes: pure water washing and ultrasonic pure water washing.

[0094] Pure water is used to wash away floating particles and dust, and ultrasonic pure water washing can remove impurities and dust in the gaps of the circuit.

[0095] In some embodiments, the oxide layer is removed in step S20 by pickling, and the acidic solution is 0.8-1.2% sulfuric acid.

[0096] In some embodiments, in step S30, the temperature of the chemical solution is 25-35° C., and specifically, the chemical solution is an organic solder preservative solution.

[0097] In some embodiments, the drying temperature in step S40 is 65-75°C.

[0098] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible circuit board drying device, comprising an oven body, wherein the oven body is provided with a discharge port and a feed port on the front and rear sides thereof, respectively, and characterized in that: Also includes: A water storage tank, fixedly connected to the rear side of the oven body and connected to the feed inlet; A water squeezing unit is arranged in the water storage tank, the water squeezing unit includes a water squeezing component and a driving component connected to the water squeezing component, the water squeezing component is sequentially spaced and distributed in a plurality of groups along the front-to-back direction, the driving component is arranged one-to-one with the water squeezing component, the water squeezing component includes two upper and lower corresponding sponge rollers, the two upper and lower corresponding sponge rollers are used for interference fit with the flexible circuit board, and the driving component is used for driving the upper and lower corresponding two sponge rollers to rotate in opposite directions; as well as A drying unit, disposed in the oven body and used to remove moisture from the surface of the flexible circuit board; The left and right side plates of the water storage tank are respectively provided with through avoidance grooves, the avoidance grooves extend in the up-down direction, the sponge roller has a transmission shaft passing through the avoidance grooves, and an adjustment unit is provided on the outer side of the avoidance grooves, the adjustment unit comprising: There are two bases, the two bases correspond to the transmission shafts one by one and are rotatably connected, and the bases are slidably connected to the outer wall of the water tank along the up and down directions; and An adjusting member, used for adjusting the distance between the two bases; The drive assembly comprises: A movable seat is slidably connected to the outer wall of the water tank in a front-to-rear direction and has a first state of movement relative to the water tank and a second state of rest relative to the water tank; A driving wheel, rotatably connected to the moving seat around its own central axis; A driving member, drivingly connected to the driving wheel; A first driven wheel, fixedly mounted on the outer periphery of the transmission shaft located above; A reversing roller, which rotates around its own central axis and is connected to the base below; A second driven wheel is fixedly arranged on the outer periphery of the reversing roller; A transmission belt is wound around the first driven wheel, the second driven wheel and the driving wheel; A first reversing gear is fixedly mounted on the outer periphery of the reversing roller; and A second reversing gear is fixedly mounted on the outer periphery of the transmission shaft below; Wherein, when the distance between the two upper and lower corresponding bases changes, the movable seat is in the first state, and when the transmission belt is in a tight state, the movable seat is in the second state; The first reversing gear drives the second reversing gear to rotate.

2. The flexible circuit board drying device according to claim 1, characterized in that: The movable seat is detachably fixed to the outer wall of the water tank; or A fixed seat is fixedly provided on the outer wall of the water tank, a one-way screw is threadedly connected inside the fixed seat, the one-way screw is arranged along the front-back direction, the one-way screw is fixedly connected to the movable seat, a threaded sleeve is threadedly connected to the outer periphery of the one-way screw, and the threaded sleeve is rotatably connected to the fixed seat around its own central axis.

3. The flexible circuit board drying device according to claim 1, characterized in that: The top wall and the bottom wall of the avoidance groove are both provided with a storage cavity, and a stopper is provided in the storage cavity to slide along the up and down directions. The transmission shaft passes through the stopper and is rotatably connected to the stopper, and an accordion cover is fixed between the upper and lower stoppers.

4. The flexible circuit board drying device according to claim 1, characterized in that: The adjusting member is a bidirectional lead screw, which includes a smooth rod and threaded rods respectively fixed to the top and bottom ends of the smooth rod. The smooth rod rotates around its own central axis and is connected to the outer wall of the water tank. The threads of the two threaded rods have opposite rotation directions, and the threaded rods are screwed to the base.

5. The flexible circuit board drying device according to claim 1, characterized in that: The adjusting member is a telescopic component that can be extended and retracted in the up and down directions. The adjusting member has a fixed section fixed to the outer wall of the water tank and movable sections respectively arranged at the top and bottom ends of the fixed section. One end of the movable section away from the fixed section is fixed to the base.

6. The flexible circuit board drying device according to claim 1, characterized in that: The drying unit comprises: A strong wind tube is fixedly arranged in the oven body at one side close to the feed port, and a plurality of the strong wind tubes are provided, and the plurality of the strong wind tubes are arranged at intervals along the front-to-back direction, and the strong wind tubes are used to blow away the water droplets remaining on the surface of the flexible circuit board; and A hot air cylinder is fixedly connected to the inner wall of the oven body. The hot air cylinder is located between the strong air cylinder and the discharge port, and a plurality of hot air cylinders are arranged at intervals along the front-to-back direction. The hot air cylinder is used to send hot air to the surface of the flexible circuit board.

7. A flexible circuit board coating anti-oxidation process, characterized in that: The steps include: S10. Remove dust and impurities from the surface of the flexible circuit board; S20, processing the flexible circuit board after removing dust and impurities, and removing the oxide layer on the surface of the board; S30, immersing the flexible circuit board after the oxide layer is removed into a chemical solution, so that an anti-oxidation layer is formed on the surface of the flexible circuit board; S40. Drying the flexible circuit board using the flexible circuit board drying device as described in any one of claims 1 to 6.

8. The flexible circuit board coating anti-oxidation process according to claim 7, characterized in that: In the step S30, the temperature of the chemical solution is 25-35°C.

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