A wire coating device and a wire coating method

Abstract

The application discloses a wire coating device and a wire coating method, and relates to the technical field of additive manufacturing. The wire coating device comprises a wire feeding mechanism, a coating mechanism, a water feeding mechanism and a blow-drying mechanism. The coating mechanism has a rotating glue cavity. The glue cavity is located on the transmission path of the wire. The water feeding mechanism has a water feeding pipe which is in communication with a water feeding hole of the glue cavity. The blow-drying mechanism has a blow pipe, a blow-drying channel and a blow inlet. The end of the blow pipe corresponds to the blow inlet. The wire coating method comprises the following steps: S1, mixing powder to be added with glue to form a coating liquid; S2, placing the coating liquid in the glue cavity; S3, setting the water conveying amount in the water feeding pipe, the air flow in the blow pipe and the rotating speed of the glue cavity according to the type and volume of the coating liquid; and S4, starting the wire feeding mechanism, so that the wire sequentially passes through a penetrating hole, the glue cavity, a penetrating-out hole and the blow-drying channel, and the wire coating operation is completed. The wire coating device can realize stable and reliable long-time operation.

Description

Technical Field

[0001] This invention relates to the field of additive manufacturing technology, and in particular to a filament coating device and a filament coating method. Background Technology

[0002] Additive manufacturing technology is a new and advanced manufacturing technology that has emerged in recent years, integrating computer technology, numerical control technology, and materials processing technology. This technology uses a layer-by-layer additive method to achieve the manufacturing of solid parts and the bonding of dissimilar materials between layers. It features short manufacturing cycles, minimal workpiece deformation, dense microstructure, and large variations in particle size and content. It offers good controllability, enables three-dimensional automated machining, and produces high-quality results.

[0003] In the additive manufacturing process of composite materials, coating filaments with coating liquid often requires long-term operation in actual production. During this process, the coating liquid will lose water and dry out, resulting in it being unable to effectively adhere to the filaments and affecting normal processing operations. Therefore, there is an urgent need for a stable, reliable filament coating device and filament coating method that can support long-term operation. Summary of the Invention

[0004] The purpose of this invention is to provide a filament coating device and a filament coating method to solve the problems existing in the prior art and to achieve stable and reliable support for long-term operation.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a filament coating device, including a filament feeding mechanism, a coating mechanism, a water supply mechanism, and a drying mechanism. The filament feeding mechanism guides the filament along a designated path. The coating mechanism has a rotating adhesive cavity containing a coating liquid. The adhesive cavity also has an insertion hole, an exit hole, and a water inlet communicating with it. The adhesive cavity is located on the filament's transport path, and the insertion hole and the exit hole are used for threading the filament. The water supply mechanism has a water supply pipe, the end of which communicates with the water inlet. The water supply pipe is used to transport water. The drying mechanism has a blower pipe, a drying channel, and a blow-in port communicating with the drying channel. On the filament's transport path, the drying channel is located behind the adhesive cavity, and the filament coated with the coating liquid enters the drying channel after passing through the exit hole. The end of the blower pipe corresponds to the blow-in port, and the blower pipe is used to transport compressed gas.

[0007] Preferably, the coating mechanism includes a front end component, a middle component, a rear end component, and a driver; on the filament transport path, the front end component is located at the front end of the middle component, and the rear end component is located at the rear end of the middle component; both the front end component and the rear end component are fixed in position, and the two ends of the middle component are rotatably connected to the corresponding front end component and the rear end component respectively; the front end component has a front end through hole and a water flow guide hole; the middle component has the glue cavity and an inlet, an outlet, and a water flow inlet communicating with the glue cavity; the rear end component has a rear end through hole; the driver is used to drive the middle component to rotate; the water flow guide hole can communicate with the water flow inlet; the water flow guide hole and the water flow inlet together form the water filling hole; the front end through hole and the inlet together form the insertion hole, and the rear end through hole and the outlet together form the exit hole; the filament is sequentially passed through the front end through hole, the inlet, the glue cavity, the outlet, and the rear end through hole.

[0008] Preferably, the inlet and outlet have the same aperture, and the front through hole and the rear through hole have the same aperture; the inlet aperture is larger than the diameter of the wire and smaller than the aperture of the front through hole.

[0009] Preferably, the aperture of the inlet is 120% of the wire diameter.

[0010] Preferably, the drying mechanism includes an extension tube; the extension tube has a through drying channel, one end of the extension tube is fixedly connected to the rear end component, and the rear end through hole communicates with the drying channel; the axis of the drying channel coincides with the filament transport path, and the extension tube has a blow-in port on its side wall, the extension direction of the blow-in port being parallel to the filament transport path.

[0011] Preferably, a wire feeding tube is fixedly provided on the side of the front end component away from the middle component and on the side of the extension tube away from the rear end component; the wire feeding tube is used for threading the wire.

[0012] Preferably, the filament feeding mechanism includes a front filament feeder and a rear filament feeder; on the filament transport path, the front filament feeder is located at the front end of the coating mechanism, and the rear filament feeder is located at the rear end of the coating mechanism; the front filament feeder has two opposing and rotatably arranged first filament feed rollers; the rear filament feeder has two opposing and rotatably arranged second filament feed rollers; the space between the two first filament feed rollers and the space between the two second filament feed rollers is used for threading the filament.

[0013] Preferably, the front end component and the middle component, as well as the rear end component and the middle component, are rotatably connected by bearings.

[0014] Preferably, a sealing device is also provided between the water flow guide hole and the water flow inlet; the sealing device can keep the water flow inlet closed when the water flow guide hole and the water flow inlet are not connected.

[0015] The present invention also provides a method for covering filaments based on the filament covering device described in any one of the above claims, comprising the following steps:

[0016] S1, mix the powder and colloid to be added thoroughly to form a coating solution;

[0017] S2, the formed coating liquid is placed inside the adhesive cavity;

[0018] S3, set the water delivery volume in the water delivery pipe, the air flow rate in the air blowing pipe, and the rotation speed of the glue cavity according to the type and volume of the coating liquid; after checking that everything is correct, turn on the water delivery pipe to deliver water, turn on the air blowing pipe to blow air, and start the glue cavity to rotate.

[0019] S4, the filament feeding mechanism is started, and the filament passes through the insertion hole, the glue cavity, the exit hole and the drying channel in sequence to complete the filament wrapping operation.

[0020] The present invention achieves the following technical effects compared to the prior art:

[0021] The filament coating device provided by this invention, by setting a rotating glue cavity and a water supply pipe and water inlet, can realize the functions of water replenishment and stirring of coating liquid compared with the existing structure. It effectively solves the problems of coating liquid dehydration and unevenness caused by excessive duration during the manufacturing process. It can stably and reliably support long-term operation, greatly simplify coating liquid maintenance operations, improve manufacturing efficiency, and has good industrialization prospects. In addition, the set drying mechanism can accelerate the solidification of coating liquid, reduce the loss caused by its falling off before solidification, and prevent the coating liquid from carrying the moisture of the beam into the additive manufacturing operation area, effectively avoiding defects such as pores caused by excessive moisture during additive manufacturing.

[0022] Furthermore, the front and rear components are fixed in position, serving as a stable support structure for the entire coating mechanism. The two ends of the middle component are rotatably connected to the front and rear components, respectively. This connection method allows the middle component to rotate stably under the drive of the driver. This is beneficial because during long-term operation, the filament can always pass through each hole and glue cavity in the correct position, reducing problems such as uneven coating or damage to the filament caused by device shaking or component displacement.

[0023] Furthermore, the design of the inlet and outlet orifices being smaller than the orifices of the front and rear through holes effectively reduces leakage of the coating liquid from the inlet and outlet. Due to the fluidity of the coating liquid itself, it will not flow out from the inlet and outlet even when the filament is not passing through. During the filament transport process, since the coating liquid is mainly concentrated in the glue cavity, the relatively small orifice at the inlet can form a "bottleneck" structure, further preventing leakage of the coating liquid from the inlet and outlet. If the orifice is too large, some coating liquid may be exposed, resulting in waste. Moreover, the smaller orifice can also constrain and limit the coating liquid on the filament, reducing the amount of coating liquid on the filament.

[0024] Furthermore, the inlet with an aperture of 120% of the wire diameter allows for a relatively reasonable space in this annular area, preventing the coating liquid from being obstructed due to an excessively small aperture. During long-term operation, this reasonable flow space ensures that the coating liquid continuously and stably coats the wire, improving the coating quality.

[0025] Furthermore, the longer drying channel allows compressed gas to more thoroughly remove moisture or solvent from the coating liquid, resulting in a more complete drying of the coating layer on the surface of the filament, effectively improving the drying effect and ensuring the quality of the filament coating.

[0026] Furthermore, feed tubes are installed on both sides of the front end and the extension tube, providing a longer guide for the filament, reducing filament swaying and deviation, thereby ensuring that the filament accurately enters the front end and exits from the extension tube, so that the entire coating and drying process can proceed stably.

[0027] Furthermore, the front and rear wire feeders are located at the front and rear ends of the coating mechanism, respectively. This dual wire feeder setup enables bidirectional traction of the wire. The wire feeding wheel ensures the straightness of the wire, allowing it to pass smoothly through the glue cavity. The synergistic effect of the two wire feeders helps maintain the stability of the wire tension.

[0028] Furthermore, by connecting the front end component to the middle component and the rear end component to the middle component using bearings, it is possible to ensure that the middle component has precise positioning during rotation. The bearings can withstand radial and axial forces, keeping the rotation axis of the middle component stable during long-term operation. The use of bearings greatly reduces the friction between components.

[0029] Furthermore, a sealing device is installed between the water flow guide hole and the water flow inlet. When the water flow guide hole and the water flow inlet are not connected, the sealing device can effectively seal the water flow inlet, thereby reducing the outflow of coating liquid from the water flow inlet; and it can also prevent external impurities, such as dust and metal shavings, from entering the glue cavity and affecting the quality of the coating liquid.

[0030] This invention also provides a method for coating silk based on the above-mentioned silk coating device. First, the powder and colloid are thoroughly mixed to form a coating liquid, which ensures that the composition of the coating liquid is uniform. In long-term silk coating operations, a uniform coating liquid is the key to achieving stable coating quality on the silk surface. After the glue chamber rotates, the coating liquid is in a good flow and mixing state. Water supply can maintain the stable flow of the coating liquid, and air blowing can promptly handle the subsequent drying problem. The whole process ensures the integrity and stability of the silk coating, so that the effect of silk coating can remain stable and reliable in batch operations. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the overall structure of the filament coating device (excluding the driver in the coating mechanism) provided by the present invention;

[0033] Figure 2 This is a cross-sectional structural diagram of the coating mechanism in the filament coating device provided by the present invention.

[0034] In the picture:

[0035] 10 - Front wire feeder; 11 - First wire feed roller;

[0036] 20 - Feeding wire tube;

[0037] 30 - Front-end component; 31 - Water supply pipe; 32 - Front-end through hole; 33 - Water flow guide hole;

[0038] 40 - Middle component; 41 - Inlet; 42 - Glue cavity; 43 - Outlet; 44 - Water inlet;

[0039] 50 - Rear end component; 51 - Rear end through hole;

[0040] 60 - Extended tube; 61 - Air blower tube; 62 - Air inlet;

[0041] 70 - Rear wire feeder; 71 - Second wire feed roller. Detailed Implementation

[0042] 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.

[0043] The purpose of this invention is to provide a filament coating device and a filament coating method to solve the problems existing in the prior art and to achieve stable and reliable support for long-term operation.

[0044] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Example 1

[0046] This embodiment provides a filament coating device, mainly but not limited to the application of coating particulate gel onto filaments, such as... Figure 1 and Figure 2 As shown, the device includes a yarn feeding mechanism, a coating mechanism, a water supply mechanism, and a drying mechanism. The yarn feeding mechanism guides the yarn along a designated path. The coating mechanism has a rotating adhesive cavity 42, which holds a coating liquid (such as a granular gel composed of powder and colloid). The adhesive cavity 42 is also provided with an inlet hole, an outlet hole, and a water inlet hole that communicate with it. The adhesive cavity 42 is located on the yarn's transport path, and the inlet hole and outlet hole are used for threading the yarn. The water supply mechanism has a water supply pipe 31, the end of which can communicate with the water inlet hole. The water supply pipe 31 is used to transport water. The drying mechanism has an air blowing pipe 61 and an air inlet 62 that communicates with the drying channel. On the yarn's transport path, the drying channel is located behind the adhesive cavity 42, and the yarn coated with the coating liquid enters the drying channel after passing through the outlet hole. The end of the air blowing pipe 61 corresponds to the air inlet 62, and the air blowing pipe 61 is used to transport compressed gas.

[0047] By incorporating a rotating adhesive cavity 42, a water supply pipe 31, and a water inlet, this structure enables the replenishment and stirring of the coating solution compared to existing structures. This effectively addresses the issues of coating solution dehydration and unevenness caused by prolonged operation during manufacturing. It provides stable and reliable support for extended periods of operation, significantly simplifies coating solution maintenance, improves manufacturing efficiency, and demonstrates promising industrialization prospects. Furthermore, the drying mechanism accelerates the solidification of the coating solution, reducing losses due to pre-curing shedding. It also prevents the coating solution from carrying moisture from the beam into the additive manufacturing area, effectively avoiding defects such as porosity caused by excessive moisture during additive manufacturing.

[0048] The following are the specifications regarding the wire feeding mechanism:

[0049] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 As shown, the filament feeding mechanism includes a front filament feeder 10 and a rear filament feeder 70. In the filament transport path, the front filament feeder 10 is located at the front end of the coating mechanism, and the rear filament feeder 70 is located at the rear end of the coating mechanism. The front filament feeder 10 has two opposing and rotatably arranged first filament feed rollers 11; the rear filament feeder 70 has two opposing and rotatably arranged second filament feed rollers 71. The space between the two first filament feed rollers 11 and the two second filament feed rollers 71 is used for threading the filament. The front filament feeder 10 and the rear filament feeder 70 are located at the front and rear ends of the coating mechanism, respectively. This dual filament feeder configuration enables bidirectional traction of the filament. The filament feed rollers ensure the straightness of the filament, allowing it to smoothly pass through the adhesive cavity 42. Furthermore, the synergistic effect of the two filament feeders helps maintain stable filament tension.

[0050] The following are the relevant setup instructions for the coating mechanism:

[0051] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 2 As shown, the coating mechanism includes a front-end component 30, a middle component 40, a rear-end component 50, and a driver. On the filament transport path, the front-end component 30 is located at the front end of the middle component 40, and the rear-end component 50 is located at the rear end of the middle component 40. Both the front-end component 30 and the rear-end component 50 are fixed in position, and the two ends of the middle component 40 are rotatably connected to the corresponding front-end component 30 and rear-end component 50, respectively. The front-end component 30 has a front-end through-hole 32 and a water flow guide hole 33. The middle component 40 has a glue cavity 42 (similar to a cylindrical structure) and a drive mechanism connected to the glue cavity 42. The coating mechanism includes a connected inlet 41, outlet 43, and water inlet 44; a rear end component 50 has a rear end through hole 51; a driver is used to rotate the middle component 40; a water flow guide hole 33 can communicate with the water inlet 44; the water flow guide hole 33 and the water inlet 44 together form a water filling hole; the front end through hole 32 and the inlet 41 together form an insertion hole, and the rear end through hole 51 and the outlet 43 together form an exit hole; the filament is sequentially threaded through the front end through hole 32, the inlet 41, the glue cavity 42, the outlet 43, and the rear end through hole 51. The front end component 30 and the rear end component 50 are fixed in position, serving as a stable support structure for the entire coating mechanism. The two ends of the middle component 40 are rotatably connected to the front end component 30 and the rear end component 50, respectively. This connection method allows the middle component 40 to rotate stably under the drive of the driver. This is beneficial because during long-term operation, the filament can always be threaded through each hole and glue cavity 42 in the correct position, reducing problems such as uneven coating or damage to the filament caused by device shaking or component displacement.

[0052] Specifically, the cavity 42 contains a mixture of colloidal powders, wherein the colloid can be a 5% polyvinyl alcohol solution (by volume). Those skilled in the art can also replace it with other colloids with higher viscosity. The poor flowability ensures that the colloid will not flow out from the inlet 41 and outlet 43 due to gravity. The powder can be selected as appropriate alloy powder or ceramic powder as needed.

[0053] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 2 As shown, the inlet 41 and outlet 43 have the same aperture, and the front through hole 32 and rear through hole 51 have the same aperture. The aperture of inlet 41 is larger than the diameter of the wire and smaller than the aperture of the front through hole 32. The design that the apertures of inlet 41 and outlet 43 are smaller than the apertures of the front through hole 32 and rear through hole 51 can effectively reduce the leakage of coating liquid from inlet 41 and outlet 43. Due to the fluidity of the coating liquid itself, it will not flow out from inlet 41 and outlet 43 even if the wire does not pass through. During the wire transport process, since the coating liquid is mainly concentrated in the glue cavity 42, the relatively small aperture at inlet 41 can form a "bottleneck" structure, further preventing the coating liquid from leaking from inlet 41 and outlet 43. If the aperture is too large, some coating liquid may be exposed, resulting in waste. Moreover, the smaller aperture can also constrain and limit the coating liquid on the wire, reducing the amount of coating liquid on the wire.

[0054] In the optional solutions of this embodiment, it is more preferred that the aperture of the inlet 41 is 120% of the wire diameter. For example, if the wire is a common 1.2mm diameter, the aperture of the inlet 41 should be 1.4mm. The aperture of the inlet 41, which is 120% of the wire diameter, makes the space of this annular area relatively reasonable, and the flow of the coating liquid will not be obstructed due to the aperture being too small. During long-term operation, this reasonable flow space can ensure that the coating liquid continuously and stably coats the wire, thereby improving the coating quality.

[0055] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 2 As shown, the front end component 30 and the middle component 40, as well as the rear end component 50 and the middle component 40, are rotatably connected by bearings. Connecting the front end component 30 and the middle component 40, and the rear end component 50 and the middle component 40 by bearings, ensures precise positioning of the middle component 40 during rotation. The bearings can withstand radial and axial forces, keeping the rotation axis of the middle component 40 stable during long-term operation; the use of bearings greatly reduces friction between components.

[0056] Specifically, the driver used to drive the rotation of the middle component 40 is an existing device, including but not limited to the structural configurations mentioned below, such as a gear fixedly installed on the outer wall of the middle component 40, the output end of the motor having rotating teeth, the rotating teeth meshing with the gear to drive the rotation of the middle component 40; it can also be a gear, a pulley or any other drive structure that can realize the rotation of the middle component 40; this is prior art and will not be described in detail here.

[0057] The following are the relevant specifications regarding the water delivery mechanism:

[0058] In the optional embodiments of this example, a sealing device is preferably provided between the water flow guide hole 33 and the water flow inlet 44. This sealing device can keep the water flow inlet 44 closed when the water flow guide hole 33 and the water flow inlet 44 are not connected. By providing a sealing device between the water flow guide hole 33 and the water flow inlet 44, the sealing device can effectively seal the water flow inlet 44 when the two are not connected, thereby reducing the outflow of coating liquid from the water flow inlet 44. Furthermore, it can prevent external impurities, such as dust and metal shavings, from entering the adhesive cavity 42 and affecting the quality of the coating liquid.

[0059] Specifically, the sealing device can be any existing device that can connect or disconnect the fixed part (front end part 30) and the rotating part (middle part 40), including but not limited to the following structures: such as a sliding sealing ring, which is set at the water inlet 44. When the water inlet 44 of the rubber cavity 42 is not aligned with the water guide hole 33, it can ensure that there is no leakage. When the two holes are aligned, water can flow into the rubber cavity 42 through the water inlet 44.

[0060] Specifically, when the filament is coated with granular gel, the water pipe 31 delivers hot water at a temperature not lower than 80°C.

[0061] The following are the specifications regarding the drying mechanism:

[0062] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 As shown, the drying mechanism includes an extended tube 60; the extended tube 60 has a through drying channel, one end of the extended tube 60 is fixedly connected to the rear end component 50, and the rear end through hole 51 communicates with the drying channel; the axis of the drying channel coincides with the filament transport path, and a blow-in port 62 is provided on the side wall of the extended tube 60, the extension direction of the blow-in port 62 being parallel to the filament transport path. Within the longer drying channel, the compressed gas can more thoroughly remove moisture or solvent from the coating liquid, allowing the coating layer on the filament surface to dry more completely, effectively improving the drying effect and ensuring the quality of the filament coating.

[0063] Regarding other related settings:

[0064] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 As shown, a wire feeding tube 20 is fixedly installed on the side of the front end component 30 away from the middle component 40 and on the side of the extension tube 60 away from the rear end component 50; the wire feeding tube 20 is used for threading the wire. The wire feeding tubes 20 are respectively installed on both sides of the front end component 30 and the extension tube 60 to provide a longer guiding distance for the wire, reduce the swaying and deviation of the wire, and thus ensure that the wire accurately enters the front end component 30 and exits from the extension tube 60, so that the entire coating and drying process can be carried out stably.

[0065] Specifically, the connection between the front end component 30 and the feed tube 20 is set with a threaded connection structure, and the connection between the rear end component 50 and the extension tube 60 is also set with a threaded connection structure.

[0066] Specifically, the water flow guide hole 33 on the front end 30 is configured with a threaded connection at the corresponding position of the connection between it and the water supply pipe 31.

[0067] Specifically, the blower pipe 61 is connected to the compressed air cylinder.

[0068] Example 2

[0069] This embodiment provides a filament coating method based on the filament coating device of Embodiment 1, including the following steps:

[0070] S1, mix the powder and colloid to be added thoroughly to form a coating solution;

[0071] S2, place the formed coating liquid into the adhesive cavity 42;

[0072] S3, set the water delivery volume in the water delivery pipe 31, the air flow rate in the air blowing pipe 61, and the rotation speed of the glue cavity 42 according to the type and volume of the coating liquid; after checking that everything is correct, turn on the water delivery pipe 31 to deliver water, turn on the air blowing pipe 61 to blow air, and turn on the glue cavity 42 to start rotating.

[0073] S4, start the filament feeding mechanism, and the filament passes through the insertion hole, glue cavity 42, insertion hole and drying channel in sequence to complete the filament wrapping operation.

[0074] First, the powder and colloid are thoroughly mixed to form a coating liquid, which ensures that the composition of the coating liquid is uniform. In long-term filament coating operations, a uniform coating liquid is the key to achieving stable coating quality on the filament surface. After the glue chamber 42 rotates, the coating liquid is in a good flow and mixing state. Water supply can maintain the stable flow of the coating liquid, and air blowing can promptly handle subsequent drying issues. The whole process ensures the integrity and stability of the filament coating, so that the filament coating effect can remain stable and reliable during batch operations.

[0075] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A filament coating device, characterized in that: It includes a yarn feeding mechanism, a coating mechanism, a water supply mechanism, and a drying mechanism; The wire feeding mechanism is used to guide the wire to move along a designated path; The coating mechanism has a rotating adhesive cavity, which is used to hold the coating liquid; the adhesive cavity is also provided with an inlet hole, an outlet hole and a water inlet hole communicating with it; the adhesive cavity is located on the transmission path of the filament, and the inlet hole and the outlet hole are used for threading the filament. The water delivery mechanism has a water delivery pipe, the end of which can communicate with the water inlet hole; and the water delivery pipe is used to deliver water. The drying mechanism has a blowing pipe, a drying channel, and a blowing inlet connected to the drying channel; on the transmission path of the filament, the drying channel is located behind the glue cavity, and the filament coated with coating liquid enters the drying channel after passing through the through hole; the end of the blowing pipe corresponds to the blowing inlet, and the blowing pipe is used to transport compressed gas. The coating mechanism includes a front-end component, a middle component, a rear-end component, and a driver; On the transmission path of the filament, the front end piece is located at the front end of the middle part, and the rear end piece is located at the rear end of the middle part; and both the front end piece and the rear end piece are fixed in position, and the two ends of the middle part are rotatably connected to the corresponding front end piece and the rear end piece respectively. The front end component has a front end through hole and a water flow guiding hole; The middle component has the glue cavity and an inlet, an outlet, and a water inlet communicating with the glue cavity; The rear end component has a rear end through hole; The driver is used to drive the middle component to rotate; The water flow guide hole can communicate with the water flow inlet; the water flow guide hole and the water flow inlet together form the water filling hole; The front through hole and the inlet together form the insertion hole, and the rear through hole and the outlet together form the outlet hole; The filaments are sequentially threaded through the front through hole, the inlet, the glue cavity, the outlet, and the rear through hole.

2. The filament coating device according to claim 1, characterized in that: The inlet and outlet have the same aperture, and the front through hole and the rear through hole have the same aperture; the inlet aperture is larger than the diameter of the wire and smaller than the aperture of the front through hole.

3. The filament coating device according to claim 2, characterized in that: The aperture of the inlet is 120% of the wire diameter.

4. The filament coating device according to claim 1, characterized in that: The drying mechanism includes an extended tube; The extended tube has a through-hole for drying, one end of the extended tube is fixedly connected to the rear end component, and the rear end through hole communicates with the drying channel; The axis of the drying channel coincides with the filament transport path, and the blowing inlet is provided on the side wall of the extended tube, with the extension direction of the blowing inlet parallel to the filament transport path.

5. The filament coating device according to claim 4, characterized in that: The front end component is fixedly provided with a wire feeding tube on the side away from the middle component and the extension tube is fixedly provided with a wire feeding tube on the side away from the rear end component. The wire feeding tube is used for threading the wire.

6. The filament coating device according to claim 1, characterized in that: The wire feeding mechanism includes a front wire feeder and a rear wire feeder; On the filament transport path, the front filament feeder is located at the front end of the coating mechanism, and the rear filament feeder is located at the rear end of the coating mechanism. The front wire feeder has two opposing and rotatably arranged first wire feed rollers; the rear wire feeder has two opposing and rotatably arranged second wire feed rollers; the space between the two first wire feed rollers and the space between the two second wire feed rollers is used for threading the wire.

7. The filament coating device according to claim 1, characterized in that: The front end component and the middle component, as well as the rear end component and the middle component, are rotatably connected by bearings.

8. The filament coating device according to claim 1, characterized in that: A sealing device is also provided between the water flow guide hole and the water flow inlet; The sealing device can keep the water inlet closed when the water flow guide hole is not connected to the water flow inlet.

9. A method for covering filaments based on the filament covering apparatus according to any one of claims 1 to 8, characterized in that: Includes the following steps: S1, mix the powder and colloid to be added thoroughly to form a coating solution; S2, the formed coating liquid is placed in the adhesive cavity; S3, set the water delivery volume in the water delivery pipe, the air flow rate in the air blowing pipe, and the rotation speed of the glue cavity according to the type and volume of the coating liquid; After the inspection is completed, turn on the water supply pipe to deliver water, turn on the air blower to blow air, and start the rubber cavity to rotate. S4, start the filament feeding mechanism, and the filament passes through the insertion hole, the glue cavity, the exit hole and the drying channel in sequence to complete the filament wrapping operation.

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