Coating apparatus

Abstract

The application provides a coating device, which comprises a shell cover, a base, a spraying conveying track, a sliding plate, a connecting frame and sealing curtains, the top end of the sealing curtains is connected with the top end of an opening on the shell cover, the bottom end of the sealing curtains is provided with a first magnet, the sliding plate is movably arranged on the inner wall of the shell cover and close to the bottom end of the opening, a plurality of second magnets for positioning magnetic attraction with the first magnet are arranged on the sliding plate, a pressing block is arranged on a jig, the extension plates at the two ends of the connecting frame are respectively vertically and slidably connected on the two sides of the spraying conveying track, the bottom end of the connecting frame is connected with the base through elastic members, the top end of the extension plates is provided with a pressure receiving block, and the sliding plate is connected with the connecting frame. When the coating device conveys the jig, the pressing block on the jig extrudes the pressure receiving block to move upwards, drives the sliding plate to slide upwards, makes the second magnets attract all the first magnets, makes the plurality of sealing curtains be stably butt-jointed and arranged, and further makes the plurality of sealing curtains form a seal to the opening, so that the sealing effect is good.

Description

Technical Field

[0001] This invention relates to the field of spray coating equipment, and particularly to a coating device. Background Technology

[0002] In the production of circuit boards for home appliances, communication equipment, and automotive electronics, a conformal coating process is required. Some circuit board coating equipment consists of individual units. After the front side is coated, the empty fixture at the end of the line is manually moved back to the front, and then the fixture containing the circuit board is manually flipped over and fed into the coating equipment to coat the reverse side. Two workers are stationed at the end of the coating line to manually inspect the conformal coating effect. After coating, adhesive dispensing is required. When dispensing is needed, the product must be manually transferred to another dispensing line for dispensing. To improve automation, some designers connect coating equipment, dispensing equipment, and testing equipment via conveyor tracks. This results in a faster cycle for circuit boards to enter and exit the coating equipment. Therefore, the coating equipment typically only has a simple accordion cover or a highly movable rubber curtain at the input and output ports. This type of structure has poor sealing effect, allowing the coating material to easily diffuse into the external space, affecting the health of the operators.

[0003] Therefore, a coating device is needed to solve the above-mentioned technical problems. Summary of the Invention

[0004] This invention provides a coating device to solve the problem in the prior art of poor sealing of the inlet and outlet of spraying and dispensing equipment, which causes the sprayed material to easily diffuse into the external space and affect the health of the operators.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: a coating device, comprising an outer shell, a base, a spray conveying track, a slide plate, a connecting frame, and a sealing curtain, wherein the sealing curtain comprises a plurality of sealing curtain units arranged in parallel, the outer shell surrounds the top of the base, the spray conveying track is located inside the outer shell, the two ends of the outer shell are provided with openings for product conveying, the top end of the sealing curtain unit is connected to the top end of the opening, the bottom end of the sealing curtain unit is provided with a first magnet, the slide plate is movably disposed on the inner wall of the outer shell and near the bottom end of the opening, and the slide plate is provided with a plurality of second magnets for positioning and magnetic attraction with the first magnet;

[0006] The fixture is equipped with an extrusion block. Both ends of the connecting frame are connected to extension plates. The two extension plates are vertically slidably connected to both sides of the spraying conveyor track. The bottom end of the connecting frame is connected to the base through an elastic element. The top end of the extension plate is equipped with a pressure block. The pressure block is located above the sliding track of the extrusion block. The slide plate is connected to the connecting frame. The extrusion block presses the pressure block upward, thereby driving the slide plate to slide upward, so that the second magnet and the first magnet are magnetically attracted, thereby causing the multiple sealing curtain units to seal the opening.

[0007] In this invention, the bottom end of the first magnet is connected to a positioning plate made of plastic, and the bottom end of the positioning plate is provided with a positioning groove. The sliding plate is provided with a positioning protrusion for matching the positioning groove.

[0008] The positioning groove is a V-shaped groove, the positioning protrusion and the second magnet are disposed on the side surface of the slide plate, the first magnet is disposed on the side surface of the sealing curtain unit, and the side surface of the slide plate and the side surface of the sealing curtain are in surface contact for positioning.

[0009] Preferably, the bottom of the positioning plate is covered with a rubber layer to prevent scratching the circuit board.

[0010] In this invention, cylindrical bar magnets are embedded in both sides of the sealing curtain unit, and the bar magnets are spaced a set distance from the first magnet.

[0011] In this invention, a ball bearing is rolled on the side of the pressure block near the extrusion block.

[0012] In this invention, a pressure plate is connected to the base, the pressure plate is located above the connecting frame, and the elastic element is positioned between the connecting frame and the pressure plate.

[0013] In this invention, the coating equipment further includes a spraying bracket and a crossbeam, the crossbeam being slidably connected to the spraying bracket, a plurality of the spray nozzles being slidably connected to the crossbeam, and a scale being provided on the crossbeam.

[0014] In this invention, the spraying conveying track includes a first track and a second track. One of the first track and the second track is connected to a width-adjusting screw drive. A width-adjusting motor drives the width-adjusting screw to rotate, thereby adjusting the distance between the first track and the second track.

[0015] In this invention, one end of the outer casing is connected to the first through-plate connection device, and the other end is connected to the second through-plate connection device. The coating equipment further includes:

[0016] The front lifting device is connected to the end of the first overpass connecting device away from the base;

[0017] A curing device is connected to the end of the second plate connecting device away from the base, and is used to irradiate the sprayed product to cure the coating.

[0018] A flipping device is attached to the end of the curing device away from the base, for flipping the product over;

[0019] The rear lifting device is connected to the end of the flip-plate device that is away from the base.

[0020] The return conveyor line is formed by connecting the front lifting device, the first plate connecting device, the spraying conveyor track, the second plate connecting device, the curing device, and the flipping device to form an upper conveyor line. The return conveyor line is located below the upper conveyor line, and both ends of the return conveyor line are connected to the front lifting device and the rear lifting device, respectively. The front lifting device and the rear lifting device connect to the upper conveyor line or the return conveyor line by lifting.

[0021] Compared with the prior art, the beneficial effects of this invention are as follows: When the coating equipment of this invention is conveying the fixture, the extrusion block on the fixture extrudes the pressure block and moves it upward, thereby driving the slide plate to slide upward, and causing the second magnet to attract all the first magnets, so that multiple sealing curtain units can be stably docked and arranged, thereby making the sealing curtains seal the opening, resulting in a good sealing effect. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of the present invention.

[0023] Figure 1 This is a front view of the coating equipment of the present invention when connected and used with a curing device, a flipping device, a dispensing device, and an inspection device.

[0024] Figure 2 for Figure 1 Top view of the structure.

[0025] Figure 3 This is a front view of the coating equipment, curing device, and flipping device of the present invention when connected and used together.

[0026] Figure 4 This is a schematic diagram of the coating equipment of the present invention.

[0027] Figure 5 for Figure 4 The diagram shows the structure of the coating equipment with a sealing curtain.

[0028] Figure 6 for Figure 4 The diagram shows the coating equipment without its outer casing.

[0029] Figure 7 for Figure 6 The diagram shows the structure of the connecting frame and the slide plate.

[0030] Figure 8 for Figure 5 A partial structural diagram of the bottom of the sealing curtain unit.

[0031] Figure 9 This is a schematic diagram of the connection structure between the sealing curtain and the fixing strip. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] The directional terms mentioned in this invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this invention, and are not intended to limit this invention.

[0034] The terms "first" and "second" used in the terminology of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as limiting the order of events.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, a connection can be a detachable connection or a connection of an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] In the existing technology, some designers connect coating equipment, dispensing equipment, and testing equipment through conveyor tracks. This makes the cycle of circuit boards entering and leaving the coating equipment relatively fast. Therefore, the coating equipment usually only has a simple accordion cover or a highly movable rubber curtain at the input and output ports. The sealing effect of this type of structure is poor, which makes it very easy for the sprayed material to spread into the external space, affecting the health of the operators.

[0037] The following is a first embodiment of a coating device provided by the present invention that can solve the above-mentioned technical problems.

[0038] Please refer to Figure 1 and Figure 2 The image shows a front view of the coating device of the present invention when it is connected and used with a curing device, a dispensing device, and an inspection device. Figure 2 This is a top view of the coating apparatus of the present invention.

[0039] In the diagram, units with similar structures are represented by the same labels.

[0040] This invention provides an embodiment of a coating device that is integrated with a curing device, a flipping device, a dispensing device, and an inspection device. The upper plate device 11, the front lifting device 12, the coating device 13, the curing device 14, the flipping device 15, the dispensing device 16, the inspection device 17, the rear lifting device 18, and the lower plate device 19 are sequentially connected to form an upper conveyor line. The coating device also includes a return conveyor line 1A, which is positioned below the upper conveyor line, with both ends of the return conveyor line 1A connected to the front lifting device 12 and the rear lifting device 18, respectively.

[0041] The front lifting device 12 includes a front lifting frame 121, a front lifting mechanism 122 mounted on the front lifting frame 121, and a front conveying track 123 mounted on the front lifting mechanism 122. The front conveying track 123 connects to the upper conveyor line or the lower conveyor line through lifting. The rear lifting device 18 includes a rear lifting frame 181, a rear lifting mechanism 182 mounted on the rear lifting frame 181, and a rear conveying track 183 mounted on the rear lifting mechanism 182. The rear conveying track 183 connects to the upper conveyor line or the lower conveyor line through lifting. The rear lifting device 18 lifts and transports the circuit board that needs to be sprayed on the reverse side on the upper conveyor line and the empty fixture after the circuit board is removed from the lower plate device 19 to the return conveyor line 1A. The front lifting device 12 receives the empty fixture or the fixture carrying the circuit board on the return conveyor line 1A, transports the empty fixture to the upper plate device 11, and transports the fixture carrying the circuit board to the coating equipment 13. It has a high degree of automation and high work efficiency.

[0042] It should be noted that both the front lifting mechanism 122 and the rear lifting mechanism 182 can adopt the linear drive mechanism in the prior art.

[0043] Please refer to Figure 2 In this embodiment, the front lifting device 12 is further provided with a front lifting empty fixture detection mechanism 125, a first feed sensor 124, and a first discharge sensor 126. The first feed sensor 124 is located at one end of the front lifting device 12 near the upper plate device 11 and is used to sense the fixture conveyed by the upper plate device 11. The first discharge sensor 126 is located at one end of the front lifting device 12 near the coating equipment 13 and is used to sense the conveying of the fixture on the front lifting device 12 to the coating equipment 13, and to sense the conveying of the fixture from the return conveyor line 1A to the front lifting device 12. The front lifting empty fixture detection mechanism 125 is located on one side of the front lifting device 12 and is used to detect whether the fixture from the return conveyor line 1A carries a product. The front lifting device 12 conveys the empty fixture to the upper plate device 11 or the fixture carrying the product to the coating equipment 13 according to the signal from the front lifting empty fixture detection mechanism 125.

[0044] The rear lifting device 18 is also equipped with a spraying detection mechanism 184, a second feed sensor 185, and a second discharge sensor 186. The second feed sensor 185 is located at one end of the rear lifting device 18 near the inspection device 17, and is used to sense the fixture conveyed by the inspection device 17 and to sense the conveying of the fixture on the rear lifting device 18 back to the conveyor line 1A. The second discharge sensor 186 is located at one end of the rear lifting device 18 near the lower plate device 19, and is used to sense the conveying of the fixture on the rear lifting device 18 to the lower plate device 19. The spraying detection mechanism 184 is located on one side of the rear lifting device 18, and is used to detect whether the product on the fixture from the inspection device 17 has been sprayed. The rear lifting device 18 conveys empty fixtures and fixtures that have not been sprayed back to the conveyor line 1A according to the signal from the spraying detection mechanism 184, or conveys fixtures carrying products and having been sprayed to the lower plate device 19.

[0045] The lowering device 19 includes a lowering frame 194, a rear lifting empty fixture detection mechanism 193, a third feed sensor 192, and a lowering conveyor track 191, all mounted on the lowering frame 194. The third feed sensor 192 is located at one end of the lowering conveyor track 191 near the rear lifting device 18, and is used to sense the conveying of fixtures from the rear lifting device 18 to the lowering device 19, and to sense the conveying of empty fixtures from the lowering device 19 to the rear lifting device 18. The rear lifting empty fixture detection mechanism 193 is located on one side of the lowering conveyor track 191 and is used to detect whether the fixtures on the lowering conveyor track 191 are carrying products. When an empty fixture is detected on the lowering conveyor track 191, the control device controls the rear lifting device 18 to dock with the lowering conveyor track 191 to receive the empty fixture.

[0046] The unloading device 19 also includes a third discharge sensor 195, which is located at the end of the unloading frame 194 away from the inspection device 17. This sensor can sense the circuit board and control the unloading device 19 to stop conveying. It can also be used to connect with equipment for subsequent processes.

[0047] The loading device 11 includes a loading frame 111, a loading conveyor track 112, a loading positioning sensor 114, and a loading discharge sensor 116. The loading conveyor track 112 is mounted on the loading frame 111. The loading positioning sensor 114 and the loading discharge sensor 116 are sequentially arranged along the conveying direction of the loading conveyor track 112. The loading positioning sensor 114 senses the fixture being conveyed on the loading device 11 to control the fixture to stop at a set position on the loading device 11, so that the circuit board can be placed onto the fixture manually or mechanically. The loading discharge sensor 116 senses the conveying of the fixture on the loading device 11 to the forward lifting device 12, and senses the conveying of an empty fixture on the forward lifting device 12 to the loading device 11.

[0048] In addition, the upper plate device 11 can also be equipped with an upper plate feed sensor 113 and an upper plate empty fixture detection mechanism 115. The upper plate feed sensor 113 is located at the end of the upper plate frame 111 away from the coating equipment 13, and can be used to connect with the equipment of the preceding process to further improve the degree of automated manufacturing. The upper plate empty fixture detection mechanism 115 is located between the upper plate positioning sensor 114 and the upper plate discharge sensor 116, and is used to confirm whether the fixture on the upper plate device 11 is carrying products to avoid conveying errors.

[0049] Please refer to Figure 1In this embodiment, the coating equipment further includes a first plate-connecting device 1B, a second plate-connecting device 1C, and a third plate-connecting device 1D. The first plate-connecting device 1B is disposed between the front lifting device 12 and the coating equipment 13, the second plate-connecting device 1C is disposed between the coating equipment 13 and the curing device 14, and the third plate-connecting device 1D is disposed between the flipping device 15 and the dispensing device 16. Since the processes of spraying, curing, and dispensing are time-consuming, the plate-connecting devices can buffer the fixtures carrying the products, allowing the products to be quickly fed into the corresponding equipment after the spraying, curing, or dispensing operations are completed. The first plate-connecting device 1B, the second plate-connecting device 1C, and the third plate-connecting device 1D are all existing conveyor structures such as chains or belts.

[0050] It should be noted that the first plate connecting device 1B, the second plate connecting device 1C, and the third plate connecting device 1D are all equipped with corresponding sensors to sense the position of the fixture, thereby controlling the start and stop of the first plate connecting device 1B, the second plate connecting device 1C, and the third plate connecting device 1D.

[0051] In this embodiment, the curing device 14 includes a UV curing lamp 141 for curing the coating on the sprayed circuit board under light (the UV curing lamp 141 is located inside the housing). Figure 2 The UV curing lamp 141 is indicated by a dashed line (UV curing lamp is a type of ultraviolet lamp). The curing device 14 is also equipped with a cooling mechanism 142 for dissipating heat from the UV curing lamp 141.

[0052] In this embodiment, the coating equipment 13 includes a spraying conveyor track for carrying the product, a nozzle 139 disposed above the spraying conveyor track, and a spraying information reading mechanism 13A. After the spraying information reading mechanism 13A reads the information code on the circuit board, the software of the coating equipment 13 immediately retrieves the spraying trajectory program of the current circuit board and executes the spraying trajectory program by controlling the movement of the nozzle 139. It should be noted that the nozzle 139 in this embodiment is connected to the XYZU motion assembly to execute various movements. The XYZU motion assembly is prior art, such as the motion structure of a multi-axis robot in the prior art, and will not be described in detail here.

[0053] The dispensing device 16 includes a dispensing platform for carrying the product, a dispensing head and a dispensing information reading mechanism 161 disposed above the dispensing platform. After the dispensing information reading mechanism 161 reads the information code on the circuit board, the software of the dispensing device 16 will immediately call up the dispensing trajectory program of the current circuit board and execute the dispensing trajectory program by controlling the movement of the dispensing head.

[0054] The flipping device 15 includes a flipping conveyor track for clamping and conveying products, and a flipping information reading mechanism disposed above the flipping conveyor track. The flipping information reading mechanism can read the information code on the circuit board. The flipping device 15 determines whether to flip the flipping conveyor track based on the information read by the flipping information reading mechanism.

[0055] The inspection device 17 includes an inspection platform for carrying the product, a detection camera and an inspection information reading mechanism 171 mounted above the inspection platform. After the inspection information reading mechanism 171 reads the information code on the circuit board, the inspection software of the inspection device 17 will immediately recall the corresponding spraying effect inspection trajectory program and control the detection camera to execute the spraying effect inspection trajectory program for shooting and inspection.

[0056] It should be noted that the information code can be set on the surface of the fixture. The spraying conveyor track is the spraying conveyor track that supports the fixture, the dispensing conveyor track is the dispensing platform that supports the fixture, and the inspection conveyor track of the inspection device 17 is the inspection platform that supports the fixture.

[0057] Furthermore, the upper conveyor track 112, front conveyor track 123, spraying conveyor track 133, dispensing platform, flip conveyor track, inspection platform, rear conveyor track 183, and return conveyor line 1A are all connected to width-adjusting screws. Width-adjusting motors drive the screws to rotate, and all width-adjusting motors are electrically connected to the same control device. The main control touchscreen of the control device is connected to a handheld barcode scanner. When processing products of different specifications, the fixture widths differ. Simply scanning the information code on the fixture switches all conveyor tracks along the entire line, including the lower return conveyor line 1A, to their corresponding width, resulting in a high degree of automation and very convenient operation. It should also be noted that in this embodiment, the upper conveyor track 112, front conveyor track 123, spraying conveyor track, dispensing platform, flip conveyor track, inspection platform, rear conveyor track 183, and return conveyor line 1A can all utilize existing conveyor structures such as chains or belts.

[0058] For example, the spraying conveyor track 133 includes a first track and a second track, one of which is connected to a width-adjusting screw drive. A width-adjusting motor drives the width-adjusting screw to rotate, thereby adjusting the distance between the first track and the second track.

[0059] Optionally, in this embodiment, the front lifting device 12 includes multiple sets of front conveying tracks 123, which are arranged in parallel at different heights of the front lifting mechanism 122. The return conveyor line 1A includes a return conveyor sensor and a front lifting empty fixture detection mechanism 125. Both the return conveyor positioning sensor and the front lifting empty fixture detection mechanism 125 are located at one end of the return conveyor line 1A near the front lifting device 12, with the return conveyor positioning sensor being closer to the front lifting device 12 than the front lifting empty fixture detection mechanism 125. The control device controls the return conveyor line 1A to stop based on the sensing signal from the return conveyor positioning sensor. The front lifting empty fixture detection mechanism 125 is used to detect whether the fixture on the stopped return conveyor line 1A carries a product. This allows the front lifting mechanism 122 to receive and transfer multiple sets of fixtures with each lift.

[0060] Preferably, the front lifting mechanism 122 is provided with two sets of front conveying tracks 123 at different height positions. Empty jigs and jigs carrying products on the return conveyor line 1A are spaced apart. Each time the front lifting mechanism 122 descends, one of the two sets of front conveying tracks 123 receives an empty jig and the other receives a jig carrying products. Then the front lifting mechanism 122 rises, which can convey the empty jig to the upper plate device 11 and the jig carrying products to the first plate connecting device 1B, making the operation more efficient.

[0061] Please refer to Figures 4-7 In this embodiment, the coating equipment 13 further includes an outer casing 132, a base 131, a spray conveying track 133, a slide plate 135, a connecting frame 136, and a sealing curtain 134. The sealing curtain 134 includes a plurality of sealing curtain units 1343 arranged in parallel. The outer casing 132 surrounds the top of the base 131. The spray conveying track 133 is located inside the outer casing 132. The two ends of the outer casing 132 are provided with openings 1321 for product conveying. The top of the sealing curtain unit 1343 is connected to the top of the opening 1321. The bottom of the sealing curtain unit 1343 is provided with a first magnet 1341. The slide plate 135 is movably disposed on the inner wall of the outer casing 132 and close to the bottom of the opening 1321. The slide plate 135 is provided with a plurality of second magnets 1351 for positioning and magnetic attraction with the first magnet 1341.

[0062] The fixture is equipped with an extrusion block. Both ends of the connecting frame 136 are connected to extension plates 1361. The two extension plates 1361 are vertically slidably connected to both sides of the spraying conveyor track 133. The bottom end of the connecting frame 136 is connected to the base 131 through an elastic element 13C. The top end of the extension plate 1361 is equipped with a pressure block 1362. The pressure block 1362 is located above the sliding track of the extrusion block. The slide plate 135 is connected to the connecting frame 136. The extrusion block squeezes the pressure block 1362 upward, thereby driving the slide plate 135 to slide upward, so that the second magnet 1351 and the first magnet 1341 are magnetically attracted, so that multiple sealing curtain units 1343 can be stably docked and arranged, thereby making the sealing curtain 134 seal the opening 1321, with a good sealing effect.

[0063] Please refer to Figure 9 In this embodiment, the sealing curtain 134 is connected to the outer casing 132 via a fixing strip 1346. The fixing strip 1346 has a positioning groove, and the top portion of the sealing curtain 134 is positioned within the positioning groove. Both ends of the fixing strip 1346 have connecting holes, through which the fixing strip 1346 is fixedly connected to the inner wall of the outer casing 132. The sealing curtain 134 is sandwiched between the fixing strip 1346 and the outer casing 132. When the fixing strip 1346 is connected to the outer casing 132, the sealing curtain 134 contacts the inner wall of the outer casing 132, while the fixing strip 1346 is at a set distance from the inner wall of the outer casing 132, thereby ensuring stable contact between the sealing curtain 134 and the inner wall of the outer casing 132.

[0064] A fixing post can be set on the fixing strip 1346, and a fixing hole is set at the top of the sealing curtain unit 1343. The sealing curtain unit 1343 and the fixing strip 1346 are connected by interference fit between the fixing post and the fixing hole.

[0065] In this embodiment, the elastic element 13C is specifically configured such that a pressure plate 13B is connected to the base 131, the pressure plate 13B is located above the connecting frame 136, and the elastic element 13C is limited between the connecting frame 136 and the pressure plate 13B.

[0066] It should be noted that the extrusion block and the pressure block 136 only come into contact when the fixture is conveyed to the spraying position. Therefore, when the fixture is conveyed at the opening 1321, the connecting frame 136 moves downward under the pressure of the elastic member 13C, causing the slide plate 135 to slide away from the first magnet 1341. As a result, the fixture can pass through the sealing curtain very easily and smoothly with very little resistance.

[0067] For preferred options, please refer to [the provided text]. Figure 7 and Figure 8In this embodiment, the bottom end of the first magnet 1341 is connected to a positioning plate 1342 made of plastic. A positioning groove 13421 is provided through the bottom end of the positioning plate 1342, and a positioning protrusion is provided on the slide plate 135 to match the positioning groove 13421. There is no magnetic attraction between the positioning plate 1342 and the slide plate 135, which facilitates positioning and engagement. A certain magnetic attraction is maintained between the slide plate 135 and the first magnet 1341, which can ensure the stable docking arrangement between multiple sealing curtain units 1343 and facilitate the disengagement of the slide plate from the sealing curtain 134.

[0068] In this embodiment, the positioning groove 13421 is preferably a V-shaped groove, which facilitates docking with the positioning protrusion 1352. The positioning protrusion 1352 and the second magnet 1351 are disposed on the side surface of the slide plate 135, and the first magnet 1341 is disposed on the side surface of the sealing curtain unit 1343. The side surface of the slide plate 135 and the side surface of the sealing curtain 134 are in surface contact for positioning.

[0069] Preferably, the bottom of the positioning plate 1342 is covered with a rubber layer 1345, which is relatively soft to avoid scratching the circuit board.

[0070] In this invention, cylindrical bar magnets 1344 are embedded on both sides of the sealing curtain unit 1343, and the bar magnets 1344 are spaced a predetermined distance from the first magnet 1341. This enhances the sealing performance between adjacent sealing curtain units 1343. Furthermore, because the bar magnets 1344 are cylindrical, adjacent bar magnets 1344 form a linear magnetic attraction, which is not too strong, facilitating separation and allowing the fixture to pass through the sealing curtain 134.

[0071] Preferably, ball bearings are rolled on the side of the pressure block 1362 near the extrusion block to reduce friction between the pressure block 1362 and the fixture, thus avoiding affecting the conveying of the fixture. The force exerted by the pressure block on the fixture is downward, which also makes the fixture contact the spray conveying track 133 more tightly, which is beneficial for conveying.

[0072] In this embodiment, the coating device 13 further includes a spraying bracket 137 and a crossbeam 138. The crossbeam 138 is slidably connected to the spraying bracket 137, and a plurality of nozzles 139 are slidably connected to the crossbeam 138. A scale 1381 is provided on the crossbeam 138 to facilitate precise adjustment of the position of the nozzles 139.

[0073] The working principle of the coating equipment in this embodiment will be explained below. For clarity, the two sides of the circuit board are referred to as side A and side B. The working principle of this invention is as follows: First, the information code on side A of the circuit board is scanned using a barcode scanner connected to the control device. At this time, the control device will adjust all the conveyor tracks to move to the width corresponding to the specifications of the fixture.

[0074] Place the circuit board A side up on the empty fixture positioned and stopped on the upper plate device 11, and then press the release button. The upper plate conveying track 112 will transport the fixture carrying the circuit board to the forward lifting device 12. During the transport process, it will pass through the upper plate discharge sensor 116, the first feed sensor 124, and the first discharge sensor 126, so that the start and stop of the upper plate conveying track 112 and the forward conveying track 123 can be controlled by sensing signals. When the fixture is sensed by the first discharge sensor 126, the forward lifting device 12 will stop transporting. After the first plate connecting device 1B gives a signal that it needs to be fed, the forward lifting device 12 will transport the fixture to the first plate connecting device 1B. Similarly, after the coating equipment 13 gives a signal that it needs to be fed, the forward lifting device 12 will transport the fixture to the coating equipment 13.

[0075] Each time the fixture is transported from one device to another, a corresponding sensor detects the fixture and provides feedback on the transport position. The detection process will not be described in detail hereafter.

[0076] After the fixture enters the coating equipment 13, the spraying information reading mechanism 13A reads the information code on the circuit board. Then, the software of the coating equipment 13 immediately retrieves the spraying trajectory program of the current circuit board and executes the spraying operation by controlling the movement of the nozzle 139.

[0077] After the coating is completed, the fixture will be conveyed to the second board connection device 1C. After the curing device 14 gives the signal that the material needs to be fed, the fixture enters the curing device 14. After being irradiated by ultraviolet light, the coating on the circuit board will gradually cure. After curing is completed, the fixture will be conveyed to the flipping device 15.

[0078] After the fixture enters the set position of the flipping device 15, the conveying stops. The flipping information reading mechanism reads the information code on the circuit board to confirm whether it needs to be flipped. If the circuit board needs to be sprayed or glued on both sides, then it is on side A. Therefore, the circuit board needs to be flipped so that side B is facing up. Thus, the flipping device 15 drives the flipping conveyor track to flip, causing the fixture to flip 180 degrees. Then, the flipping conveyor track conveys the fixture to the third board transfer device 1D.

[0079] After the dispensing device 16 sends a signal indicating that material needs to be fed, the third board-connecting device 1D conveys the fixture to the dispensing device 16. The fixture stops at the dispensing position, and the dispensing information reading mechanism 161 reads the information code on the circuit board. The software of the dispensing device 16 immediately retrieves the dispensing trajectory program for the current circuit board and executes the dispensing operation by controlling the movement of the dispensing head. After dispensing is complete, the fixture is conveyed to the inspection device 17.

[0080] The fixture enters the set position of the inspection device 17 and stops. The inspection information reading mechanism 171 reads the information code on the circuit board. The inspection software of the inspection device 17 immediately calls up the corresponding spraying and dispensing effect inspection trajectory program, controls the detection camera to execute the spraying effect inspection trajectory program to take pictures and detect. If the inspection is unqualified, an alarm is set. If it is qualified, the fixture is transported to the rear lifting device 18.

[0081] After the fixture reaches the set position on the lifting device 18, it stops. The spraying detection mechanism 184 detects whether the B side of the circuit board is sprayed with a coating. Since the A side of the circuit board was sprayed before, and the circuit board has been flipped, the coating cannot be detected. Therefore, the lifting mechanism 182 will drive the rear conveyor rail 183 to descend and dock with the return conveyor line 1A to transport the fixture to the return conveyor line 1A.

[0082] Then, the return conveyor line 1A transports the fixture to the forward lifting device 12. When the fixture is detected by the return sensor at the end of the return conveyor line 1A near the forward lifting device 12, the transport of the fixture stops, and the control device controls the forward lifting mechanism 122 to drive the forward conveyor rail 123 to descend and receive the fixture on the return conveyor line 1A. After the fixture reaches the set position of the forward conveyor rail 123, it stops, and the forward lifting empty fixture detection mechanism 125 detects whether the fixture carries a circuit board. If it carries a circuit board, the forward conveyor rail 123 rises and transports the fixture to the first board-connecting device 1B. If it is an empty fixture without a circuit board, the forward conveyor rail 123 rises and transports the fixture to the board-mounting device 11. At this time, the forward conveyor rail 123 receives a fixture carrying a circuit board with its B side facing up, and therefore transports it to the first board-connecting device 1B.

[0083] The circuit board with side B facing up will undergo the following processes as described above: spraying by coating equipment 13, curing by curing device 14, flipping by flipping device 15, dispensing by dispensing device 16, and inspection by inspection device 17. If side A does not require dispensing, the flipping and dispensing operations can be omitted depending on the actual situation. When the circuit board reaches the set position on the rear lifting device 18, it stops (assuming it has flipped to side A facing up). The spraying detection mechanism 184 will detect that side A of the circuit board has been coated. Therefore, the rear lifting device 18 will transport the fixture to the lower plate device 19. The fixture stops transporting after being detected by the third discharge sensor 195. The circuit board can be manually removed, and the release button is pressed. The rear lifting empty fixture detection mechanism 193 detects that the fixture is empty, and the rear conveying track 183 docks with the rear lifting device 18 to receive the empty fixture.

[0084] The rear lifting mechanism 182 drives the rear conveyor rail 183 to descend and dock with the return conveyor line 1A. The return conveyor line 1A will transport the empty fixture to the front lifting device 12. The front lifting device 12 will receive the empty fixture and, after rising, transport it to the upper plate device 11. The empty fixture will stop after being sensed by the upper plate positioning sensor 114. At this time, the unprocessed circuit board A-side up can be placed on the empty fixture on the upper plate device 11. The processing operation can be repeated by repeating the above steps.

[0085] This completes the processing procedure of the coating equipment in this embodiment.

[0086] The following is a second embodiment of a coating device provided by the present invention that can solve the above-mentioned technical problems. Compared with the first embodiment, the solution in this embodiment is free of the upper plate device, the dispensing device, the inspection device, and the lower plate device. That is, it mainly serves the spraying operation and the curing operation after spraying, and the structure is more simplified. Other structures and principles are the same as those in the first embodiment.

[0087] Please refer to Figure 3 , Figure 3 This is a front view of the coating equipment, curing device, and flipping device of the present invention when connected and used together.

[0088] This invention provides a coating device 13 ( Figure 3 The intermediate coating equipment 13 can also be understood as the coating equipment body, which performs the main spraying work. It is also connected to the curing device 14 and the flipping device 15. At the same time, it works with the front lifting device 12, the rear lifting device 18 and the return conveyor line 1A to realize the circuit board flipping and then spraying, and to realize the cyclic conveying of the fixture.

[0089] The front lifting device 12, the first plate connecting device 1B, the coating equipment 13, the second plate connecting device 1C, the curing device 14, the flipping device 15, and the rear lifting device 18 are sequentially connected to form the upper conveyor line. The coating equipment also includes a return conveyor line 1A, which is located below the upper conveyor line, and its two ends are connected to the front lifting device 12 and the rear lifting device 18, respectively. The front lifting device 12 and the rear lifting device 18 connect to the upper conveyor line or the return conveyor line 1A by lifting.

[0090] The front lifting device 12 includes a front lifting frame 121, a front lifting mechanism 122 mounted on the front lifting frame 121, and a front conveyor rail 123 mounted on the front lifting mechanism 122. The front conveyor rail 123 connects to the upper or lower conveyor line via lifting. The rear lifting device 18 includes a rear lifting frame 181, a rear lifting mechanism 182 mounted on the rear lifting frame 181, and a rear conveyor rail 183 mounted on the rear lifting mechanism 182. The rear conveyor rail 183 connects to the upper or lower conveyor line via lifting. When an empty fixture is transported from the return conveyor line 1A to the front lifting device 12, the front lifting device 12 rises and then stops, allowing the operator to place the uncoated circuit board. When a fixture carrying a coated circuit board is transported to a set position on the rear lifting device 18, the rear lifting device 18 stops, waiting for the operator to retrieve the circuit board.

[0091] The rear lifting device 18 lifts and transports the circuit boards that need to be coated on the reverse side of the upper conveyor line and the empty fixtures after the circuit boards are removed to the return conveyor line 1A. The front lifting device 12 receives the empty fixtures or the fixtures carrying circuit boards from the return conveyor line 1A, keeps the empty fixtures on the front lifting device 12 to wait for the uncoated circuit boards to be placed, and transports the fixtures carrying circuit boards to the coating equipment 13. The system has a high degree of automation and high work efficiency.

[0092] In this embodiment, only the circuit board is sprayed. The spraying process is relatively stable, and the precision requirements are not very high. In addition, the rear lifting device 18 is also equipped with a spraying detection mechanism 184, which can perform a certain degree of detection on the spraying. Therefore, no inspection device is provided in this embodiment.

[0093] In this embodiment, the front lifting empty fixture detection mechanism 125, the first feed sensor 124, and the first discharge sensor 126 of the front lifting device 12, the spraying detection mechanism 184, the second feed sensor 185, and the second discharge sensor 186 on the rear lifting device 18, the flipping conveyor track of the flipping device 15, the flipping information reading mechanism, the sealing curtain 134 of the coating equipment 13, etc., are all the same as in the first embodiment, and will not be described in detail here. In addition, since there is no lower plate device, the rear lifting empty fixture detection mechanism 193 in the first embodiment is set on the rear lifting device 18.

[0094] The coating equipment of this invention can return empty jigs and flipped circuit boards via a front lifting device, a rear lifting device, and a return conveyor line, achieving a high degree of automation and high work efficiency. Furthermore, it can automatically perform quality checks on spraying and dispensing, saving labor costs and improving product quality.

[0095] When the coating equipment conveys the fixture, the extrusion block on the fixture presses the pressure block upward, thereby driving the slide plate to slide upward, and causing the second magnet to attract all the first magnets, so that multiple sealing curtain units can be stably docked and arranged, thereby making the sealing curtains seal the opening, resulting in a good sealing effect.

[0096] In summary, although the present invention has been disclosed above with two embodiments, the above embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A coating apparatus, characterized in that, The device includes an outer casing, a base, a spraying conveyor track, a sliding plate, a connecting frame, and a sealing curtain. The sealing curtain comprises multiple sealing curtain units arranged in parallel. The outer casing surrounds the top of the base. The spraying conveyor track is located inside the outer casing. The outer casing has openings at both ends for product conveying. The top of each sealing curtain unit is connected to the top of the opening. A first magnet is provided at the bottom of each sealing curtain unit. The sliding plate is movably disposed on the inner wall of the outer casing and near the bottom of the opening. Multiple second magnets are provided on the sliding plate for positioning and magnetic attraction with the first magnet. The fixture is equipped with an extrusion block. Both ends of the connecting frame are connected to extension plates. The two extension plates are vertically slidably connected to both sides of the spraying conveyor track. The bottom end of the connecting frame is connected to the base through an elastic element. The top end of the extension plate is equipped with a pressure block. The pressure block is located above the sliding track of the extrusion block. The slide plate is connected to the connecting frame. The extrusion block presses the pressure block upward, thereby driving the slide plate to slide upward, so that the second magnet and the first magnet are magnetically attracted, thereby causing the multiple sealing curtain units to seal the opening.

2. The coating equipment according to claim 1, characterized in that, The bottom end of the first magnet is connected to a positioning plate made of plastic, and a positioning groove is provided through the bottom end of the positioning plate. The sliding plate is provided with a positioning protrusion for matching the positioning groove.

3. The coating equipment according to claim 2, characterized in that, The positioning groove is a V-shaped groove, the positioning protrusion and the second magnet are disposed on the side surface of the slide plate, the first magnet is disposed on the side surface of the sealing curtain unit, and the side surface of the slide plate and the side surface of the sealing curtain are in surface contact for positioning.

4. The coating equipment according to claim 2, characterized in that, The bottom of the positioning plate is covered with a rubber layer.

5. The coating equipment according to claim 1, characterized in that, Cylindrical bar magnets are embedded in both sides of the sealing curtain unit, and the bar magnets are separated from the first magnet by a set distance.

6. The coating equipment according to claim 1, characterized in that, The side of the pressure block closest to the extrusion block is provided with rolling balls.

7. The coating equipment according to claim 1, characterized in that, A pressure plate is connected to the base, the pressure plate is located above the connecting frame, and the elastic element is positioned between the connecting frame and the pressure plate.

8. The coating equipment according to claim 1, characterized in that, The coating equipment also includes a spraying bracket and a crossbeam. The crossbeam is slidably connected to the spraying bracket, and multiple spray nozzles are slidably connected to the crossbeam. A scale is provided on the crossbeam.

9. The coating equipment according to claim 1, characterized in that, The spraying conveyor track includes a first track and a second track. One of the first track and the second track is connected to a width-adjusting screw drive. A width-adjusting motor drives the width-adjusting screw to rotate, thereby adjusting the distance between the first track and the second track.

10. The coating equipment according to claim 1, characterized in that, One end of the outer casing is open to connect with the first through-plate connection device, and the other end is open to connect with the second through-plate connection device. The coating equipment also includes: The front lifting device is connected to the end of the first overpass connecting device away from the base; A curing device is connected to the end of the second plate connecting device away from the base, and is used to irradiate the sprayed product to cure the coating. A flipping device is attached to the end of the curing device away from the base, for flipping the product over; The rear lifting device is connected to the end of the flip-plate device that is away from the base. The return conveyor line is formed by connecting the front lifting device, the first plate connecting device, the spraying conveyor track, the second plate connecting device, the curing device, and the flipping device to form an upper conveyor line. The return conveyor line is located below the upper conveyor line, and both ends of the return conveyor line are connected to the front lifting device and the rear lifting device, respectively. The front lifting device and the rear lifting device connect to the upper conveyor line or the return conveyor line by lifting.

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