A special hot air drying equipment for NdFeB electroplating parts

Abstract

The present invention relates to the field of drying technology for removing liquid from solid materials or products, and specifically to a hot air drying device specifically for NdFeB electroplated parts, comprising a liquid collecting tank, a vacuum operating chamber fixed to the liquid collecting tank; a conveyor belt having one end placed outside the vacuum operating chamber and fixed to the liquid collecting tank via a bracket, and the other end connected to a support frame within the vacuum operating chamber for conveying NdFeB magnets; a drying mechanism provided on top of the support frame, a nitrogen outlet pipe of the drying mechanism extending into the vacuum operating chamber; the vacuum operating chamber containing a receiving chamber, a sealing door installed at the receiving chamber outlet, a nitrogen blowpipe connected across the receiving chamber inlet, an auxiliary pipeline connecting the nitrogen blowpipe and the nitrogen outlet pipe, a first electric valve and a second electric valve respectively controlling the auxiliary pipeline and the nitrogen outlet pipe, and a driving source on the bracket driving the conveyor belt. The present invention solves the problem of how to dry NdFeB magnets in a vacuum environment.

Description

Technical Field

[0001] The present invention relates to the technical field of drying for removing liquid from solid materials or products, and in particular to a special hot air drying device for NdFeB electroplating parts. Background Art

[0002] Electroplating of NdFeB magnets is a key process for improving their surface properties, significantly enhancing their corrosion resistance and service life. After the electroplating process is complete, the magnets need to rest briefly to allow any residual plating solution to drip off. A typical resting time of 3-8 seconds is recommended. This prevents uneven coating during subsequent drying due to excess residual solution and prevents prolonged resting that can cause initial oxidation. After the resting period, the NdFeB magnets are dried. Related prior art for drying NdFeB magnets is disclosed in the Chinese Patent Library (CN213090372U and CN117029411B).

[0003] Because NdFeB magnets are sensitive to oxidizing environments, drying them requires vacuum. However, the prior art (CN213090372U, CN117029411B) does not disclose how to dry NdFeB magnets in a vacuum. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a special hot air drying equipment for NdFeB electroplated parts to solve the problem of how to dry NdFeB magnets in a vacuum environment.

[0005] The present invention discloses a special hot air drying device for NdFeB electroplating parts, comprising a liquid collecting tank, the bottom of a vacuum operating chamber being fixed to the liquid collecting tank; one end of a conveyor belt is placed outside the vacuum operating chamber and fixed to the liquid collecting tank through a bracket, and the other end is connected to a support frame inside the vacuum operating chamber for conveying NdFeB magnets; the top of the support frame passes through the top of the vacuum operating chamber, and a drying mechanism is provided on the top, the drying mechanism comprising an exhaust fan, the exhaust fan and an electric control box being fixed to the top of the support frame, and a nitrogen air inlet pipe being connected to an air inlet of the exhaust fan for inputting nitrogen The nitrogen outlet pipe is connected to the exhaust fan outlet and extends into the vacuum operating chamber to transport nitrogen; the vacuum operating chamber includes a accommodating chamber, a sealing door is installed at the outlet of the accommodating chamber to seal the accommodating chamber, an inlet is provided at one end of the accommodating chamber, a nitrogen blowing pipe is connected across the top of the accommodating chamber inlet, an auxiliary pipeline connects the nitrogen blowing pipe and the nitrogen outlet pipe, a first electric valve is connected in series on the auxiliary pipeline and is connected to the electric control box to control the on and off of the auxiliary pipeline, and a second electric valve is provided on the nitrogen outlet pipe; a driving source is provided on the bracket, and the driving source is used to drive the conveyor belt to operate.

[0006] As one embodiment of the driving source, the driving source is a servo motor, which is fixed on a bracket, and the output shaft of the servo motor is fixed concentrically with the roller shaft at one end of the conveyor belt to drive the conveyor belt to operate.

[0007] Optimized, the blocking door is provided with a material-taking mechanism, which includes a connecting block, which is fixedly connected to the baffle to support the baffle; the baffle is slidably connected to the top of the temporary storage box, and can slide along the slide groove on the top of the temporary storage box to control the opening and closing of the blanking port; one end of the first spring is connected to the baffle, and the other end is connected to the temporary storage box, so that the baffle closes the blanking port in a natural state; the temporary storage box is sealed and slidably connected to the blocking door, and can slide relative to the blocking door to change the gap between the blanking port and the baffle; the material-taking door is an opening and closing component of the temporary storage box, which is used to take and place neodymium iron boron magnets.

[0008] Optimized, a flow balancing mechanism is installed and connected on the nitrogen outlet pipe. The flow balancing mechanism includes a flow balancing disk. The flow balancing disk is connected to the end of the nitrogen outlet pipe and forms a connecting structure with the nitrogen outlet pipe, which is used to allow the airflow in the nitrogen outlet pipe to enter the interior of the flow balancing disk. Multiple nozzles are integrated on the flow balancing disk in a matrix manner to evenly spray nitrogen.

[0009] Optimized, the present invention also includes a spraying device, the spraying device includes a hanging arm, the hanging arm is fixed on the edge of the liquid collecting tank, and is connected to the spray pipe to fix and support the spray pipe; one end of the spray pipe is connected to the spray head of the built-in water pump, which is used to transport spray water to the spray head, and the spray head flushes the neodymium iron boron magnet passing through the conveyor belt; the liquid collecting tank receives the water and impurities after spraying, and the filter tank on the side tank of the liquid collecting tank is connected to the other end of the spray pipe. The filter screen in the filter tank separates water and impurities, so that the filtered water is recycled through the spray head and the spray pipe.

[0010] Optimized, a placement tray is installed on the conveyor belt, and the placement tray is used to carry neodymium iron boron magnets. The locking unit of the placement tray fixes the placement tray when the placement tray moves under the sprinkler head, and the unlocking unit of the placement tray unlocks the placement tray after the placement tray enters the accommodating cavity, causing the placement tray to rotate instantly.

[0011] Specifically, the storage tray includes a tray body, which is used to carry the neodymium iron boron magnet; the water filter net is integrated at the bottom of the tray body and is connected to the pin shaft of the base body, and a torsion spring is connected between the pin shaft and the water filter net; the base body is fixed to the conveyor belt, and a slide groove is provided on the top; the locking unit is composed of a magnet and a second spring, the magnet is slidably connected in the slide groove of the base body and adapted to the socket of the tray body, one end of the second spring is connected to the magnet and the other end is connected to the base body; the unlocking unit is composed of a waterproof shell and a built-in electromagnet, the waterproof shell is fixed to the inner wall of the accommodating cavity, and the electromagnet attracts the magnet to slide when energized.

[0012] Optimally, a plurality of through holes are provided on the belt body of the conveyor belt in an array manner, and the through holes are used to allow the impurities remaining on the conveyor belt after spraying to fall into the liquid collecting tank below the conveyor belt under its own gravity, water flow or belt vibration.

[0013] The beneficial effects of the present invention are:

[0014] Compared with the existing technology, the present invention solves the problem of how to dry NdFeB magnets in a vacuum environment. The present invention forms a "gaseous barrier" through a nitrogen blowing pipe to block external air, ensuring that the magnets are efficiently dried under vacuum. The present invention regulates the nitrogen delivery volume through an electric control box, and the flow equalizing disk and matrix nozzle expand coverage and homogenize the airflow to avoid local insufficient drying. The present invention realizes material transfer through the coordination of a temporary storage box and a baffle, eliminating the frequent nitrogen filling and air exhaust links, reducing energy consumption and time consumption. The spray water recycling of the present invention saves resources, and the water mist can also assist in anti-oxidation and improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the hot air drying equipment specifically designed for NdFeB electroplating parts of the present invention.

[0016] Figure 2 It is a schematic diagram of the assembly structure of the drying mechanism and the support frame of the present invention.

[0017] Figure 3 It is a schematic diagram of the assembly structure of the conveyor belt of the present invention.

[0018] Figure 4 This is a schematic diagram of the installation structure of the vacuum operating chamber of the present invention.

[0019] Figure 5 It is a schematic diagram of the installation structure of the material taking mechanism of the present invention.

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the material taking mechanism.

[0021] Figure 7 Schematic diagram of the installation structure of the current balancing mechanism of the present invention.

[0022] Figure 8 It is a schematic diagram of the installation structure of the spraying equipment of the present invention.

[0023] Figure 9 It is a partial schematic diagram of the spraying equipment of the present invention.

[0024] Figure 10 This is a schematic diagram of the installation structure of the storage tray of the present invention, which is partially cut away and displayed.

[0025] Figure 11 It is a schematic diagram of the three-dimensional structure of the storage tray.

[0026] Figure 12 It is a schematic diagram of the installation structure of the manual cleaning mechanism of the present invention.

[0027] Figure 13It is a schematic diagram of the three-dimensional structure of the manual cleaning mechanism of the present invention.

[0028] Figure 14 Schematic diagram of the manual cleaning mechanism of the present invention.

[0029] In the figure, 1. nitrogen inlet pipe; 2. exhaust fan; 3. support frame; 4. electric control box; 5. vacuum operation room; 6. nitrogen outlet pipe; 7. liquid collecting tank; 8. nitrogen blowing pipe; 9. blocking door; 10. connecting block; 11. material discharging door; 12. baffle; 13. temporary storage box; 14. material discharge port; 15. first spring; 16. flow equalizing plate; 17. nozzle; 18. spray head; 19. boom; 20. spray pipe; 21. filter screen; 22. Accommodating chamber; 23. Water filter; 24. Disc; 25. Magnet; 26. Second spring; 27. Waterproof shell; 28. Base; 29. ​​Magnetic disk; 30. Brush roller; 31. First carrying arm; 32. Through hole; 33. Conveyor belt; 34. Roller; 35. Limiting column; 36. Turntable; 37. Handle; 38. Notched disk; 39. Conveyor belt; 40. Four-claw ratchet; 41. Bracket; 42. Second carrying arm; 43. Center column. DETAILED DESCRIPTION

[0030] In order to clearly understand the technical solution of the present application, the hot air drying equipment for NdFeB electroplating parts provided by the present application will be described in detail below with reference to specific embodiments and drawings.

[0031] The terms used in the following examples are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and claims of this application, the singular expressions "a," "an," "above," "the," and "this" are intended to include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the following examples of this application, "at least one," "one or more" refer to one, two, or more than two.

[0032] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "one embodiment," "some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0033] Example 1: This example provides a special hot air drying equipment for NdFeB electroplating parts. Figure 1-2 ,in Figure 1 The figure shows the overall structure of the hot air drying equipment for NdFeB electroplating parts. Figure 2 The figure shows the assembly structure of the drying mechanism and the support frame 3. As can be seen from the above two figures, the device includes a liquid collecting tank 7, which is the bottom basic bearing structure. The bottom of the vacuum operating chamber 5 is fixedly connected to the liquid collecting tank 7. Figure 3 The schematic diagram of the assembly structure of the conveyor belt 33 is shown in FIG. One end of the conveyor belt 33 is positioned outside the vacuum chamber 5 and fixedly connected to the sump 7 via a bracket 41. The other end of the conveyor belt 33 is connected to the support frame 3 inside the vacuum chamber 5, forming a conveyor channel for the NdFeB magnets. The NdFeB magnets are briefly placed on the conveyor belt 33 outside the vacuum chamber 5 before entering the vacuum chamber 5 along the conveyor belt 33, providing a carrier for material flow and rest during the drying process. The top of the support frame 3 extends through the top of the vacuum chamber 5 and is equipped with a drying mechanism. The drying mechanism specifically includes an exhaust fan 2. The exhaust fan 2 and an electrical control box 4 are fixed to the top of the support frame 3 by bolts or welding. The support frame 3 provides structural support and ensures the spatial stability of the drying mechanism. A nitrogen inlet pipe 1 is connected to an external nitrogen source (not shown) at one end and to the air inlet of the exhaust fan 2 at the other end, supplying nitrogen to the drying mechanism. One end of the nitrogen outlet pipe 6 is connected to the outlet of the exhaust fan 2, and the other end extends into the vacuum chamber 5. This pipe directs nitrogen delivered by the exhaust fan 2 into the vacuum chamber 5, creating a suitable atmosphere for drying the NdFeB magnets while also drying the magnet surfaces. The electrical control box 4 is connected to the exhaust fan 2 via a cable (not shown). This controls the exhaust fan 2's start / stop and speed, thereby regulating the nitrogen delivery rate and flow rate to match the atmospheric conditions required by the drying process. After electroplating, the NdFeB magnets are briefly allowed to rest on a conveyor belt 33 outside the vacuum chamber 5 (for 3-8 seconds to allow residual plating solution to drip off), then enter the vacuum chamber 5 along the conveyor belt 33. Finally, a drying mechanism is used to dry the NdFeB magnets under vacuum. In this embodiment, the conveyor belt 33 is driven by a servo motor. The servo motor is mounted on a bracket 41, and its output shaft is concentrically fixed to a roller 34 at one end of the conveyor belt 33.

[0034] Specifically, refer to Figure 4, shows a schematic diagram of the installation structure of the vacuum operating chamber 5. As can be seen from the figure, the vacuum operating chamber 5 includes a accommodating chamber 22, one end of which is provided with an entrance, and a blocking door 9 installed at the exit of the accommodating chamber 22. By opening and closing the blocking door 9, the accommodating chamber 22 is sealed, and the equipment inside the accommodating chamber 22 can be installed and repaired. The nitrogen injection pipe 8 is a horizontally arranged tubular structure, spanning above the entrance of the accommodating chamber 22. Its two ends are closed, and the lower end of the pipe wall is provided with an injection hole. The auxiliary pipeline is a branch pipe, one end of which is connected to the nitrogen injection pipe 8 and the other end is connected to the nitrogen outlet pipe 6. The first electric valve is installed in series with the auxiliary pipeline (e.g., a valve block between the auxiliary pipeline flanges) and connected to the electrical control box 4 via an electrical control circuit (not shown). This valve controls the on / off status of the auxiliary pipeline: when nitrogen flow in the auxiliary pipeline is cut off, nitrogen from the nitrogen outlet pipe 6 is delivered only to the main body of the accommodating chamber 22. When the auxiliary pipeline is opened, nitrogen from the nitrogen outlet pipe 6 is simultaneously delivered to the auxiliary pipeline and the nitrogen injection pipe 8. A second electric valve (not shown) is also installed on the nitrogen outlet pipe 6.

[0035] The general process of using the vacuum operating chamber 5 is as follows: First, the first electric valve closes, shutting off the auxiliary pipeline. Nitrogen from the nitrogen outlet pipe 6 is directly fed into the receiving chamber 22. The exhaust fan 2 cooperates to exhaust the air inside the receiving chamber 22, creating a vacuum environment and preparing for the drying process. Next, the first electric valve opens, simultaneously flowing nitrogen through the auxiliary pipeline and the nitrogen outlet pipe 6. Nitrogen enters the nitrogen injection pipe 8 through the auxiliary pipeline and is ejected from the injection holes, forming a "gaseous barrier" at the entrance of the receiving chamber 22. The continuous nitrogen injection prevents outside air from entering, maintaining the entrance sealed, even when the conveyor belt 33 is in motion. Simultaneously, the nitrogen outlet pipe 6 continuously delivers nitrogen to the main body of the receiving chamber 22, drying the NdFeB magnets (which are transported into the receiving chamber 22 by the conveyor belt 33). Finally, when the NdFeB magnets are completely dried, the second electric valve shuts off the nitrogen outlet pipe 6, leaving only the auxiliary pipeline to continue sealing the receiving chamber 22.

[0036] After the NdFeB magnets are dried in a vacuum environment, they need to be promptly transferred to the next process for further processing. However, in order to remove the NdFeB magnets without destroying the vacuum environment, thereby eliminating the need to frequently fill the accommodating chamber 22 with nitrogen and evacuate the air, the present invention further designs a material removal mechanism that can remove the NdFeB magnets without destroying the vacuum environment. The material removal mechanism is provided on the blocking door 9. The specific structure of the material removal mechanism is as follows.

[0037] refer to Figure 5-6 , Figure 5 The figure shows the installation structure diagram of the material taking mechanism. Figure 6The diagram shows a three-dimensional structure of the material-retrieving mechanism. As can be seen from the figure, the material-retrieving mechanism includes a connecting block 10, which is fixedly connected to the baffle 12 and serves as a carrier for connecting the baffle 12 and the support frame 3. It provides positional support for the baffle 12 so that the baffle 12 can stably participate in subsequent sliding and closing actions. The baffle 12 is connected to the top of the temporary storage box 13 in a sliding manner and can slide along the preset slide groove on the top of the temporary storage box 13, thereby controlling the opening and closing state of the material discharge port 14. When sliding, the relative position with the material discharge port 14 changes to achieve the conversion between closed and open material discharge. One end of the first spring 15 is connected to the baffle 12 and the other end is connected to the temporary storage box 13. In the natural state, the first spring 15 causes the baffle 12 to close the material discharge port 14. When the temporary storage box 13 is moved by an external force, the first spring 15 is stretched, providing power for the temporary storage box 13 to reset. The temporary storage box 13 is connected to the blocking door 9 in a sealed sliding manner (e.g., equipped with a gasket). The temporary storage box 13 can slide relative to the blocking door 9, directly affecting the gap between the discharge port 14 and the baffle 12. When sliding outward, the discharge port 14 moves away from the baffle 12, allowing the NdFeB magnets to pass through the gap. After sliding back to its original position, the baffle 12 seals the discharge port 14, creating a sealed space in the temporary storage box 13 for nitrogen filling. The access door 11 is the opening and closing component of the temporary storage box 13, used for manual access to NdFeB magnets. When closed, it forms a sealed space with the temporary storage box 13, supporting environmental control operations such as nitrogen filling.

[0038] The retrieving mechanism generally operates as follows: First, an external force (e.g., human power) pulls the temporary storage box 13 outward. Because baffle 12 is relatively fixed, the gap between the discharge opening 14 and baffle 12 increases, allowing the magnets to enter the temporary storage box 13 through the gap between the conveyor belt 33 and the discharge opening 14. When the external force is removed, the first spring 15 pulls back baffle 12, sealing the discharge opening 14. Next, the retrieving door 11 is opened, the NdFeB magnets are removed, the door 11 is closed, and the temporary storage box 13 is filled with nitrogen.

[0039] When nitrogen is ejected directly through the outlet pipe, it often suffers from limited spray range and uneven airflow distribution, resulting in insufficient nitrogen coverage in some areas and difficulty in fully contacting the magnet surface. To address this issue, a flow balancing mechanism is installed and connected to the nitrogen outlet pipe 6. The specific structure of the flow balancing mechanism is as follows.

[0040] refer to Figure 7, shows a schematic diagram of the installation structure of the flow balancing mechanism. As can be seen from the figure, it includes a flow balancing plate 16, which is connected to the end of the nitrogen outlet pipe 6. The flow balancing plate 16 and the nitrogen outlet pipe 6 form a connected structure, allowing the airflow in the nitrogen outlet pipe 6 to smoothly enter the flow balancing plate 16. The flow balancing plate 16 is integrated with multiple nozzles 17 in a matrix. The outlet pipe steadily inputs nitrogen, the flow balancing plate 16 equalizes the airflow, and the matrix arrangement of the nozzles 17 together form a uniform drying system, allowing the nitrogen to cover more area of ​​the NdFeB magnets, thereby efficiently contacting the surface of the NdFeB magnets to remove moisture and achieve uniform drying.

[0041] After electroplating, impurities often remain on the surface of NdFeB magnets, affecting product quality and performance. To address this issue, the present invention utilizes a spray device to remove impurities from the surface of NdFeB magnets. The spray creates a mist that not only removes impurities but also indirectly prevents oxidation through the mist's coverage. The specific structure of the spray device is as follows.

[0042] refer to Figure 8-9 ,in, Figure 8 The diagram shows the installation structure of the spray equipment. Figure 9 Shown are partial schematic diagrams of the spraying equipment. As can be seen from the two figures above, the spraying equipment includes a boom 19, which serves as a supporting structure. Bottom arm 19 is fixedly connected to the edge of the sump 7 and is connected to a spray pipe 20, securing and supporting the pipe. One end of the spray pipe 20 is connected to a spray head 18 (with a built-in pump). The spray pipe 20 is used to transport spray water, drawing the spray water from the sump 7 to the spray head 18. The spray head 18 then flushes the NdFeB magnets passing through the conveyor belt 33 to remove impurities. The collecting tank 7 receives the spray water and impurities dropped after the spray head 18 flushes. A filter tank is provided on the side tank of the collecting tank 7, and the filter tank is connected with the other end of the spray pipe 20. A filter screen 21 is provided in the filter tank. The filter screen 21 can separate the spray water and impurities in the collecting tank 7 and block the impurities. The spray water filtered in the collecting tank 7 is extracted by the built-in water pump of the spray head 18 and is used again for flushing operations through the spray pipe 20 and the spray head 18. While completing the flushing operation, the recycling of the spray water is realized.

[0043] The workflow of the present invention is roughly as follows:

[0044] In the first step, after electroplating, the NdFeB magnets are placed on a conveyor belt 33 outside the vacuum operating chamber 5 and allowed to rest for a short time (3-8 seconds) to allow any residual plating solution to drip off. The conveyor belt 33 then transports the magnets to the spraying equipment area. The spray pipe 20 carried by the boom 19 draws clean water from the sump 7 through the spray head 18 with a built-in pump to spray the magnets with clean water filtered through the sump 7 to remove surface impurities. The sprayed water then falls back into the sump 7 and is recycled through the filter screen. At the same time, the water mist assists in preventing oxidation.

[0045] In the second step, the conveyor belt 33 delivers the washed NdFeB magnets into the vacuum operating chamber 5, and the blocking door 9 closes the outlet of the sealed accommodating chamber 22; the first electric valve is closed to cut off the auxiliary pipeline, and nitrogen is input into the accommodating chamber 22 through the air inlet pipe, the exhaust fan 2, and the air outlet pipe, and the air is exhausted to create a vacuum environment.

[0046] In the third step, the first electric valve is opened, and nitrogen is passed through the auxiliary pipeline and the air outlet pipe simultaneously: nitrogen is ejected from the nitrogen injection pipe 8 above the auxiliary pipeline inlet and ejected from the injection hole to form a "gaseous barrier" to prevent air from entering from the inlet; the air outlet pipe continuously supplies nitrogen, and the electric control box 4 regulates the exhaust fan 2, and the air flow is evenly equalized through the flow equalizing plate 16 and the matrix nozzle 17 to evenly dry the surface of the NdFeB magnet.

[0047] In step 4, an external force pulls the temporary storage box 13 (sealed and sliding with the blocking door 9) to slide outward, the gap between the blanking port 14 and the baffle 12 increases, and the magnet enters the temporary storage box 13; after the force is removed, the first spring 15 pulls back the baffle 12 to close the blanking port 14, and the material removal door 11 is opened to remove the material. After closing the door, nitrogen is filled to maintain the vacuum environment of the accommodating chamber 22.

[0048] Compared with the existing technology, the present invention solves the problem of how to dry NdFeB magnets in a vacuum environment. The present invention forms a "gaseous barrier" through the nitrogen blowing pipe 8 to block the external air, ensuring that the magnets are efficiently dried under vacuum. The present invention regulates the nitrogen delivery volume through the electric control box 4, and the flow equalizing disk 16 and the matrix nozzle 17 expand the coverage and homogenize the airflow to avoid local insufficient drying. The present invention realizes material transfer through the coordination of the temporary storage box 13 and the baffle 12, eliminating the frequent nitrogen filling and air exhaust links, reducing energy consumption and time consumption. The spray water recycling of the present invention saves resources, and the water mist can also assist in anti-oxidation and improve product quality.

[0049] Example 2: When batch processing NdFeB magnets after electroplating, it is crucial to achieve stable loading of the magnets to ensure the efficient execution of the subsequent spraying and drying processes. The existing loading method is prone to affecting the processing effect due to the displacement and shaking of the NdFeB magnets during the transmission process. For this reason, this embodiment installs a storage tray for loading NdFeB magnets on the transmission belt: when the storage tray moves with the transmission belt to the bottom of the spray head 18, it is fixed by the locking unit of the storage tray itself to ensure that the position of the NdFeB magnets is stable during the spraying process, so that the spray water flow can act evenly on the surface of the magnets, thereby improving the impurity removal effect; after the storage tray enters the accommodating chamber 22, the unlocking unit in the accommodating chamber 22 will unlock it, and the storage tray will produce a momentary rotation action. The centrifugal force generated by the rotation further enhances the dehydration effect on the surface of the NdFeB magnets. The specific structure of the storage tray is as follows.

[0050] refer to Figure 10-11 , Figure 10 The figure shows a schematic diagram of the installation structure of the storage tray of the present invention after partial cutaway. Figure 11 The diagram shows a three-dimensional structure of a storage tray. As can be seen, the tray includes a tray body 24, which supports neodymium iron boron magnets. A water filter 23 is integrated into the bottom of the tray body 24, providing both water filtering and a rotational connection. The pins of the water filter 23 and the base 28 engage through axial holes to form a rotational connection, and a torsion spring (not shown) connects the pins and the water filter 23. The base 28 is fixed to the conveyor belt 33 and provides a mounting base for the tray body 24 and the locking unit. A slot is provided at the top of the base 28 for the magnet 25 of the locking unit to slide. The tray also includes a locking unit consisting of a magnet 25 and a second spring 26. The magnet 25 slides within the slot of the base 28, allowing reciprocating motion along the slot. The magnet 25 mates with the socket of the tray 24 to achieve "insertion lock" or "disengagement unlock." One end of a second spring 26 is connected to the magnet 25, and the other end is connected to the seat 28. After the second spring 26 pushes the magnet 25 into the socket of the tray 24, it is in a natural state (the torsion spring is now in a twisted state), cooperating with the limit tray 24. The storage tray also includes an unlocking unit, which consists of a waterproof housing 27 (which can be made of materials such as engineering plastic PA66) and a built-in electromagnet. The waterproof housing 27 is fixed to the inner wall of the accommodating cavity 22 and encapsulates the electromagnet to prevent moisture (such as residual spray water or drying moisture) from affecting its lifespan. When energized, the electromagnet generates a magnetic force that attracts the magnet 25 to slide, triggering the unlocking action.

[0051] Combined with the above connection relationship, the working principle of the storage tray is as follows:

[0052] First, magnet 25 is manually inserted into the socket of tray 24, causing second spring 26 to naturally extend. The torsion spring, restrained by magnet 25, cannot rotate, remaining in a torsional state. The tray then moves steadily along conveyor belt 33 to the spray area. Retained by magnet 25, tray 24 remains stable. The spray water filters impurities through filter screen 23 and then falls back, ensuring an even spray on the surface of the NdFeB magnets and removing any residual plating solution and impurities.

[0053] The tray then enters the accommodating chamber 22 along the conveyor belt 33. The electromagnet inside the waterproof housing 27 is energized, generating a magnetic force that attracts the magnet 25. The magnet 25 slides along the groove in the base 28, compressing the second spring 26 and disengaging the socket in the tray 24. The torsion spring releases its torsional potential, driving the tray 24 to rotate instantaneously about the pin in the base 28. The rotation of the tray 24 generates centrifugal force, which removes any residual moisture from the surface of the NdFeB magnets. While rotating, the tray 24 comes into contact with the dry nitrogen, accelerating moisture evaporation and improving drying efficiency and uniformity. The centrifugal force also enhances the removal of impurities (if any remain).

[0054] The present invention has the following beneficial effects by providing the disc 24, the base 28, the water filter 23 and the locking and unlocking units:

[0055] The locking unit secures the disc 24 during spraying, preventing the NdFeB magnets from shifting or shaking, ensuring uniform spraying and improving impurity removal. The unlocking unit triggers the disc 24 to rotate, using centrifugal force to extract moisture, accelerating evaporation, improving drying efficiency and uniformity, and enhancing impurity removal.

[0056] In Example 3, when the NdFeB magnets on the conveyor belt 33 are rinsed with spray water, some impurities are not completely separated from the conveyor belt 33 by the water flow after rinsing, but may remain on the conveyor belt 33 due to factors such as insufficient water flow impact, the stickiness of the impurities themselves, or the surface texture of the belt. In order to alleviate the above problem, this embodiment provides an improved solution, specifically: See Figure 3 A plurality of through holes 32 are formed in an array on the conveyor belt 33. When the NdFeB magnets are rinsed with water, some impurities that may have remained on the conveyor belt 33 can fall directly into the sump 7 below the conveyor belt 33 through the through holes 32 due to gravity, water flow, or belt vibration, thereby reducing the amount of impurities remaining on the conveyor belt 33 to a certain extent.

[0057] In Example 4, while the through-holes 32 provided in the conveyor belt 33 can reduce residual impurities to a certain extent, some impurities with strong adhesion or lodged in the edges of the through-holes 32 cannot be completely removed by the through-holes 32 alone, potentially affecting the cleanliness of subsequent NdFeB magnet processing. Therefore, in addition to the through-holes 32 provided in this example, a manual cleaning mechanism is installed on one side of the conveyor belt 33 (this manual cleaning mechanism replaces the servo motor that served as the original drive source in Example 1, meaning that the drive source in this example is the manual cleaning mechanism). Given the array arrangement of the through-holes 32 on the conveyor belt 33, this manual cleaning mechanism has a mode switching function.

[0058] When the NdFeB magnets are in the rinsing process, the manual cleaning mechanism can be switched to intermittent mode: at this time, the staff continuously rotates the handle 37 of the mechanism, which will drive the conveyor belt 33 to rotate. At the final stage of each rotation, the through holes 32 in the rear row just enter the cleaning range of the brush portion of the manual cleaning mechanism. The brush portion then performs targeted cleaning on this row of through holes 32, effectively removing impurities remaining in and around the through holes 32. When the NdFeB magnets enter the drying process, the manual cleaning mechanism can be switched to normal mode: at this time, the brush portion stops actively working, the staff continuously rotates the handle 37, and the manual cleaning mechanism drives the conveyor belt 33 to rotate continuously. This continuous rotation allows the NdFeB magnets to continuously change their position and angle within the drying area, so that all surfaces of the magnets can more evenly contact the drying heat source, avoiding the situation of insufficient or overdrying in some areas. At the same time, it accelerates air flow on the magnet surface and promotes water evaporation, thereby improving drying efficiency and drying quality, ensuring a more ideal drying effect for the NdFeB magnets.

[0059] refer to Figure 12-13 ,in, Figure 12 The diagram shows the installation structure of the manual cleaning mechanism. Figure 13 What is shown is a schematic diagram of the three-dimensional structure of the manual cleaning mechanism. The specific structure of the manual cleaning mechanism is as follows.

[0060] Specifically, the manual cleaning mechanism includes a turntable 36 with a concentrically fixed notched disc 38. The turntable 36 also features a handle 37 for manual operation. A four-pawl ratchet 40 is rotatably connected to a bracket 41 via a second carrier arm 42. The arcuate groove of the four-pawl ratchet 40 engages the arcuate surface of the notched disc 38, and the ratchet groove of the four-pawl ratchet 40 slidably engages a retaining post 35 on the turntable 36, forming a Geneva mechanism. When the turntable 36 rotates and the retaining post 35 contacts the ratchet groove of the four-pawl ratchet 40, the four-pawl ratchet 40 rotates. When the retaining post 35 is not in contact with the ratchet groove, the four-pawl ratchet 40 remains stationary, achieving intermittent motion. The brush roller 30 is rotatably connected to the bracket 41 via two first carrier arms 31. The brush roller 30 and the four-pawl ratchet 40 are connected by a transmission belt 39. Rotation of the four-pawl ratchet 40 drives the brush roller 30 via the transmission belt 39, cleaning the through-hole 32. The brush roller 30 contacts and fits against the inner wall of the conveyor belt 33, cleaning the through-holes 32 of the conveyor belt 33. A center post 43 is concentrically slidably connected to one of the rollers 34 of the conveyor belt 33. One end of the center post 43 secures the magnetic disk 29, while the other end concentrically secures the notched disk 38. The magnetic disk 29 forms a magnetic attraction with the proximal end of the roller 34. When the notched disk 38 and the roller 34 are brought together for attraction, the magnetic disk 29 separates from the roller 34. When the magnetic disk 29 and the roller 34 are attracted, the notched disk 38 and the roller 34 are no longer attracted. This allows switching between intermittent mode (in which the notched disk 38 and the roller 34 are attracted) and normal mode (in which the magnetic disk 29 and the roller 34 are attracted).

[0061] Combined with the above connection relationship, combined Figure 12-14 , the working principle of the manual cleaning mechanism is as follows:

[0062] Intermittent mode of the manual cleaning mechanism: When the NdFeB magnet is spraying, the notched disk 38 is pushed close to and adsorbed on the roller shaft 34. The staff continuously rotates the handle 37. During one rotation of the turntable 36, when the limiting post 35 contacts the ratchet groove of the four-pawl ratchet 40, the rear row of through holes 32 enters the cleaning range of the brush roller 30, and the brush roller 30 rotates to clean the corresponding row of through holes 32 (at this time, the brush roller 30 is actively rotating, and the rotation direction a1 of the brush roller 30 is opposite to the rotation direction a2 of the conveyor belt 33; when the limiting post 35 is not in contact with the ratchet groove, the brush roller 30 no longer actively rotates and waits for the next row of through holes 32 to be in place. Then, due to the action of the limiting post 35 and the ratchet groove, it rotates again to clean).

[0063] Normal mode of the manual cleaning mechanism: When the NdFeB magnet is drying, the notched disk 38 is pulled out of contact with the roller 34 and the magnetic disk 29 is adsorbed on the roller 34. At this time, the notched disk 38 is out of contact with the four-claw ratchet 40. The staff continues to rotate the handle 37. At this time, only the conveyor belt 33 continues to rotate, and the brush roller 30 no longer rotates actively.

[0064] The present invention provides a manual cleaning mechanism, which has the following beneficial effects:

[0065] The manual cleaning mechanism of the present invention has the advantage of flexible mode switching: when switched to intermittent mode, the through holes 32 of the conveyor belt 33 are cleaned accurately row by row, with strong pertinence, effectively removing residual impurities after spraying, ensuring the cleanliness of the conveyor belt 33, and avoiding affecting subsequent processing. When switched to normal mode, the conveyor belt 33 is manually driven to rotate continuously, allowing the neodymium iron boron magnets to continuously change their postures in the drying area, improving the uniformity and efficiency of drying, and optimizing the drying quality. The present invention adapts to the rhythm of different processes through manual operation, switches modes as needed, flexibly responds to spraying and drying scenarios, reduces the complexity and energy consumption of automatic control of equipment, and has both practical and energy-saving value.

Claims

1. A hot air drying equipment specially used for NdFeB electroplating parts, characterized by: The vacuum chamber comprises a collecting tank, and the bottom of the vacuum operating chamber is fixed to the collecting tank; one end of the conveyor belt is placed outside the vacuum operating chamber and fixed to the collecting tank through a bracket, and the other end is connected to the support frame inside the vacuum operating chamber for conveying neodymium iron boron magnets; the top of the support frame passes through the top of the vacuum operating chamber, and a drying mechanism is provided on the top, and the drying mechanism comprises an exhaust fan, the exhaust fan and an electrical control box are fixed on the top of the support frame, the nitrogen inlet pipe is connected to the exhaust fan inlet to input nitrogen, and the nitrogen outlet pipe is connected to the exhaust fan outlet and extends into the vacuum operating chamber to convey nitrogen; the vacuum operating chamber comprises a accommodating chamber, a sealing door is installed at the outlet of the accommodating chamber to close the accommodating chamber, an inlet is provided at one end of the accommodating chamber, a nitrogen blowing pipe is connected across the top of the accommodating chamber inlet, an auxiliary pipeline connects the nitrogen blowing pipe and the nitrogen outlet pipe, a first electric valve is connected in series on the auxiliary pipeline and is connected to the electrical control box to control the on and off of the auxiliary pipeline, and a second electric valve is provided at the nitrogen outlet The nozzles are connected to the nozzles to form a plurality of nozzles, which are used to spray the nitrogen gas evenly.

2. The hot air drying equipment for NdFeB electroplating parts according to claim 1, characterized in that: The driving source is a servo motor, which is fixed on the bracket. The output shaft of the servo motor is fixed concentrically with the roller shaft at one end of the conveyor belt to drive the conveyor belt to operate.

3. The hot air drying equipment for NdFeB electroplating parts according to claim 1, characterized in that: A material-retrieving mechanism is provided on the blocking door, which includes a connecting block, which is fixedly connected to the baffle to support the baffle; the baffle is slidably connected to the top of the temporary storage box, and can slide along the slide groove on the top of the temporary storage box to control the opening and closing of the blanking port; one end of the first spring is connected to the baffle, and the other end is connected to the temporary storage box, so that the baffle closes the blanking port in a natural state; the temporary storage box is sealed and slidably connected to the blocking door, and can slide relative to the blocking door to change the gap between the blanking port and the baffle; the material-retrieving door is an opening and closing component of the temporary storage box, which is used to take and place neodymium iron boron magnets.

4. The hot air drying equipment for NdFeB electroplating parts according to claim 1, characterized in that: A placement tray is installed on the conveyor belt. The placement tray is used to carry neodymium iron boron magnets. The locking unit of the placement tray fixes the placement tray when the placement tray moves under the sprinkler head. The unlocking unit of the placement tray unlocks the placement tray after the placement tray enters the accommodating cavity, causing the placement tray to rotate instantly.

5. The hot air drying equipment for NdFeB electroplating parts according to claim 4, characterized in that: The storage tray includes a tray body for carrying the NdFeB magnet; the water filter is integrated into the bottom of the tray body and is connected to the pin of the base body; a torsion spring is connected between the pin and the water filter; The seat body is fixed to the conveyor belt and a slide groove is provided on the top; the locking unit is composed of a magnet and a second spring, the magnet is slidably connected to the slide groove of the seat body and adapted to the disk body socket, one end of the second spring is connected to the magnet and the other end is connected to the seat body; the unlocking unit is composed of a waterproof shell and a built-in electromagnet, the waterproof shell is fixed to the inner wall of the accommodating cavity, and the electromagnet attracts the magnet to slide when energized.

6. The hot air drying equipment for NdFeB electroplating parts according to claim 1, characterized in that: The conveyor belt body is provided with a plurality of through holes in an array, and the through holes are used to allow the impurities remaining on the conveyor belt after spraying to fall into the liquid collecting tank below the conveyor belt under its own gravity, water flow or belt vibration.

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