Dry fiber band quantitative dusting composite device and method

Abstract

The invention relates to the technical field of composite material engineering, in particular to a dry fiber band quantitative dusting composite device and method, and the device comprises an unwinding mechanism which comprises a dry fiber band unwinding assembly, a felt unwinding assembly and a release paper unwinding assembly; the powder scattering mechanism is used for uniformly scattering powder to the surface of the dry fiber belt; the heating and pressurizing mechanism comprises a heating roller group and a cooling roller group for rolling and pressing the dry fiber belt; the winding mechanism comprises a release paper winding assembly and a dry fiber belt finished product winding assembly. The slitting mechanism comprises a plurality of cutters which can move relatively; the waste collecting mechanism is used for collecting edge waste cut by the slitting mechanism; the dry fiber belt passing through the heating and pressurizing mechanism sequentially comprises a first release paper layer, a first felt layer, a powder layer, a second felt layer, a dry fiber belt layer and a second release paper layer. Through cooperation of all the mechanisms, initial unwinding of a fiber material, improvement of powder scattering uniformity, adhesion stability of powder on the surface layer of a dry fiber belt and finished product arrangement are achieved.

Description

Technical Field

[0001] This invention relates to the field of composite material engineering technology, and in particular to a device and method for quantitative powder application and composite of dry fiber tapes. Background Technology

[0002] Quantitative powder application to dry fiber tapes aims to precisely distribute functional powders onto dry fiber materials. The primary objectives include enhancing the fiber's mechanical strength, heat resistance, and corrosion resistance, or imparting specific chemical properties to the fiber tape. The use of mechanical devices ensures uniform powder distribution across the fibers, avoiding the uneven distribution problems that can occur with traditional manual methods. Quantitative powder application emphasizes precise control of powder dosage to prevent over- or under-distribution, thereby effectively reducing material waste and improving production efficiency.

[0003] In existing technologies, common powder-spreading methods face the technical problem of uneven powder distribution, which directly affects the final performance and quality of the fibers. Traditional methods mostly rely on simple mechanical devices or manual operation, which cannot guarantee precise and uniform powder distribution. Uneven distribution may lead to instability in the strength, heat resistance, and other properties of carbon fibers, while also resulting in powder waste and environmental pollution. Furthermore, uneven powder spreading can cause powder melting during the heating and lamination process with the dry fiber belt. This melting can then stick to the rollers and be carried away during roller rotation, further affecting the production quality and efficiency of the dry fibers.

[0004] Therefore, there is an urgent need for a technical solution to address the uneven powder distribution during carbon fiber production, in order to achieve precise control over the amount of powder distributed and ensure its uniform distribution within the fiber belt, thereby improving fiber performance and reducing raw material waste. Summary of the Invention

[0005] In view of at least one of the above technical problems, the present invention provides a dry fiber tape quantitative powder spreading and compounding device and method, which improves the uniformity of powder spreading and the stability of powder adhesion by adopting structural improvements.

[0006] According to a first aspect of the present invention, a dry fiber tape quantitative powder spreading and compounding device is provided, comprising: The unwinding mechanism includes a dry fiber tape unwinding assembly, a felt unwinding assembly, and a release paper unwinding assembly, which are installed at the workstations along the dry fiber tape production line. The powder-spreading mechanism is located at the station before the release paper unwinding assembly and is used to evenly spread powder onto the surface of the dry fiber belt. The heating and pressing mechanism is located at the station after the release paper unwinding assembly, and includes a heating roller group that rolls and presses the dry fiber belt, and a cooling roller group located at the station below the heating roller group. The winding mechanism includes release paper winding assemblies and dry fiber tape finished product winding assemblies installed at the workstations along the dry fiber tape production line. The slitting mechanism is located at the next station after the release paper winding assembly. It cuts the dry fiber strip according to the required width and includes multiple cutters that can be moved to relatively different positions. A waste collection mechanism is used to collect the edge waste removed by the cutting mechanism; The dry fiber belt, which is subjected to the heating and pressurizing mechanism, sequentially includes a first release paper layer, a first felt layer, a powder layer, a second felt layer, a dry fiber belt layer, and a second release paper layer.

[0007] In some embodiments of the present invention, the powder-spreading mechanism includes a roller shaft with needle rollers on its surface, a feed bin for conveying powder onto the roller shaft, and a powder-sweeping assembly disposed on the side of the roller shaft where the powder is output, the powder-sweeping assembly being used to sweep the powder off the roller shaft.

[0008] In some embodiments of the present invention, the feed inlet of the feed hopper is in contact with the surface of the roller shaft, and the feed inlet also has a metering plate on the side of the roller shaft that abuts against the end of the needle roller.

[0009] In some embodiments of the present invention, the powder sweeping assembly includes a brush that is slidable relative to the roller shaft along the axial direction, the bristles of the brush passing through the needle roller and conforming to the surface of the roller shaft.

[0010] In some embodiments of the present invention, a preheating mechanism is further included, which is disposed between the powder spreading mechanism and the heating and pressurizing mechanism. The preheating mechanism is disposed on the surface of the dry fiber belt and is used to preheat the dry fiber belt.

[0011] In some embodiments of the present invention, both the heating roller group and the cooling roller group include a first roller rotatably connected to the first roller and a second roller that can be adjusted to a fixed position relative to the first roller. The first roller and the second roller are used to press the dry fiber belt. The heating and pressing mechanism also has an active drive component for controlling the conveying speed of the dry fiber belt.

[0012] In some embodiments of the present invention, the waste collection mechanism includes a stop bar disposed on the slitting mechanism for separating the edge waste from the dry fiber tape, and also includes a conveying assembly for collecting the edge waste, the conveying assembly including perforations for the edge waste to pass through, and a conveying drive for pulling the edge waste to move.

[0013] According to a second aspect of the present invention, a method for quantitatively applying powder to dry fiber tape is also provided, comprising the following steps: The dry fiber tape, felt and release paper are continuously unwound and wound separately by the unwinding mechanism located along the dry fiber tape production line. Use a powder-spraying mechanism to evenly spread powder onto the surface of the dry fiber belt; The dry fiber tape is heated and pressurized using a heating roller assembly to bond the powder with the felt and dry fiber tape. Then, the dry fiber tape is cooled down using a cooling roller assembly. The release paper is wound up, and the composite dry fiber tape is cut. The finished product is wound up by the dry fiber tape finished product winding assembly, and the waste is collected by the waste collection mechanism.

[0014] In some embodiments of the present invention, the powder-spreading mechanism uniformly spreads powder onto the surface of the dry fiber belt, and further includes the following steps: The powder is quantitatively and continuously conveyed to the roller surface of the powder spreading mechanism through the feeding hopper; The powder output is controlled by the contact between the metering plate and the needle roller, so as to ensure uniform distribution to the dry fiber belt; The powder is swept using a powder sweeping assembly that slides along the roller axis to ensure that the powder does not accumulate and is evenly covered on the surface of the dry fiber belt.

[0015] In some embodiments of the present invention, the powder-spreading mechanism adjusts the powder output by adjusting the height of the roller needles and the rotation speed of the roller shaft, wherein the height of the roller needles and the rotation speed of the roller shaft are calculated and set based on the target powder-spreading weight per square meter of dry fiber belt.

[0016] The beneficial effects of this invention are as follows: This invention, through functional units such as an unwinding mechanism, a powder spreading mechanism, a heating and pressurizing mechanism, a winding mechanism, a slitting mechanism, and a waste collection mechanism, achieves the following: from the initial unwinding of fiber materials to improving the uniformity of powder spreading, then to the adhesion stability of the powder on the surface of the dry fiber tape, and finally to the finishing of the finished product. The powder spreading mechanism ensures precise powder spreading and quantitative control, solving the problem of uneven powder spreading. The heating and pressurizing mechanism, through precise pressing and temperature control, ensures that the powder layer reliably adheres to the fiber surface, thereby improving the mechanical properties and processing stability of the composite material. Release paper is used to isolate the dry fiber tape, felt, and powder, preventing the powder from sticking to the rollers during the composite bonding process, which would affect the production of the dry fiber tape and its efficiency. Finally, the winding mechanism winds up the release paper, the slitting mechanism cuts the dry fiber tape to the required width and removes edge waste, the winding mechanism winds up the finished product, and the waste collection mechanism removes waste. Through the precise design of the powder-spreading mechanism and the coordinated operation of multi-functional modules, high uniformity and quantitative accuracy of powder spreading are achieved, overcoming the problems of poor powder spreading effect and quality fluctuation in traditional processes. The addition of release paper avoids sticking to the roller shaft, thus improving production efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the dry fiber tape quantitative powder spreading composite device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the station sequence of the dry fiber tape quantitative powder spreading composite device in an embodiment of the present invention; Figure 3 As described in the embodiments of the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 As described in the embodiments of the present invention Figure 3 Enlarged structural diagram at point B; Figure 5 As described in the embodiments of the present invention Figure 3 Enlarged schematic diagram of the structure at point C; Figure 6 This is a schematic diagram of the heating and pressurizing mechanism in an embodiment of the present invention; Figure 7 This is a schematic diagram of the slitting mechanism in an embodiment of the present invention; Figure 8 This is a schematic diagram of the waste collection mechanism in an embodiment of the present invention; Figure 9 This is a schematic diagram of the dry fiber belt after passing through the heating and pressurizing mechanism in an embodiment of the present invention; Figure 10 This is a flowchart illustrating the steps of the method for quantitative powder application and compounding of dry fiber tape in an embodiment of the present invention. Figure 11 This diagram illustrates the steps of uniformly applying powder by the powder-applying mechanism in the quantitative powder-applying composite method for dry fiber tape in this embodiment of the invention.

[0019] Reference numerals: 1. Unwinding mechanism; 11. Fiber tape unwinding assembly; 12. Felt unwinding assembly; 13. Release paper unwinding assembly; 2. Powder spreading mechanism; 21. Roller shaft; 22. Needle roller; 23. Feeding bin; 23a. Feeding port; 23a1. Quantifying plate; 24. Powder sweeping assembly; 24a. Brush; 3. Heating and pressurizing mechanism; 31. Heating roller group; 32. Cooling roller group; 33. First roller; 34. Second roller; 35. Active drive 4. Rewinding mechanism; 41. Release paper rewinding assembly; 42. Dry fiber tape finished product rewinding assembly; 5. Slitting mechanism; 51. Cutter; 6. Waste collection mechanism; 61. Stop bar; 62. Conveying assembly; 62a. Conveying drive component; 62b. Perforation; 7. Preheating mechanism; 01. First release paper layer; 02. First felt layer; 03. Powder layer; 04. Second felt layer; 05. Dry fiber tape layer; 06. Second release paper layer. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] like Figures 1 to 9 The dry fiber tape quantitative powder spreading and compounding device shown includes: The unwinding mechanism 1 includes a dry fiber tape unwinding assembly 11, a felt unwinding assembly 12, and a release paper unwinding assembly 13, all positioned along the dry fiber tape production line. The specific unwinding positions are determined based on the number of layers required in the actual dry fiber tape production process and the material of each layer. Each component in the unwinding mechanism 1 is equipped with an automatic control power element and a tension sensor. The automatic control power element provides constant tension to the unwinding mechanism 1 to maintain uniform conveying of the dry fiber tape during production. The tension sensor collects tension data to adjust for any deviations and maintain constant tension. The release paper unwinding isolates the roller 21 from the dry fiber tape, preventing direct contact between the heated powder adhesive and the roller 21 during the heating and pressurizing process of the heating and pressurizing mechanism 3.

[0024] The powder-spreading mechanism 2 is located at the station before the release paper unwinding assembly 13 and is used to evenly spread powder onto the surface of the dry fiber tape. The powder spread on the dry fiber tape can be bonded and laminated by heating the powder. The specific structure of the powder-spreading mechanism 2 and how to spread powder evenly are described in detail below.

[0025] The heating and pressing mechanism 3 is located at the station after the release paper unwinding assembly 13. It includes a heating roller group 31 for rolling and pressing the dry fiber strip, and a cooling roller group 32 located at the next station after the heating roller group 31. After the powdering process described above, the powdered dry fiber strip needs to be heated to make it viscous for bonding and lamination. Figure 6 As shown, heating is performed first, followed by cooling. Cooling is used to separate the release paper from the dry fiber belt. Specifically, the release paper has two layers, which are respectively placed on both sides of the dry fiber belt. It enters the heating and pressing mechanism 3 along with the dry fiber belt, and is heated and cooled by the heating roller group 31 and the cooling roller group 32. It should be noted that the number of heating roller group 31 and cooling roller group 32 can be set according to the actual processing situation. There can be one set of each, multiple sets, or other combinations such as several heating roller groups 31 and one cooling roller group 32.

[0026] The winding mechanism 4 includes a release paper winding assembly 41 and a dry fiber tape finished product winding assembly 42, which are set at the workstations along the dry fiber tape production line. The heated and formed dry fiber tape is wound up. During winding, the release paper and the dry fiber tape are separated first. The release paper winding assembly 41 winds up the release paper and the dry fiber tape winds up the dry fiber tape, so as to avoid the roller 21 from sticking to the fiber tape.

[0027] The slitting mechanism 5, located at the next station after the release paper winding assembly 41, cuts the dry fiber strip according to the required width and includes multiple cutters 51 that are relatively movable; such as Figure 7As shown, when the final product is output, the dry fiber strip can be cut to the required width, or the waste material at both ends of the dry fiber strip can be trimmed. It should be noted that the number of cutters 51 can be set according to the width of the dry fiber and the required cutting width during the actual production process; there can be one or more.

[0028] Waste collection mechanism 6 is used to collect the edge waste material cut off by slitting mechanism 5. The waste material after cutting needs to be collected uniformly. To prevent the waste material from affecting the winding of dry fibers, the output route of the edge waste material needs to be pre-set and collected uniformly. Specifically, such as... Figure 8 As shown, the cutter 51 is attached to the roller in the waste collection mechanism 6. The dry fiber strip is cut by attaching the cutter 51 to the roller. An edge position sensor can also be added to identify the edge position. If there is a deviation, it can be transmitted to the cutter 51 in real time. The width of the dry fiber strip can be accurately cut by moving the position of the cutter 51.

[0029] The dry fiber tape, processed by the heating and pressurizing mechanism 3, sequentially comprises a first release paper layer 01, a first felt layer 02, a powder layer 03, a second felt layer 04, a dry fiber tape layer 05, and a second release paper layer 06. Specifically, as shown... Figure 9 As shown, dry fiber strips and felt, as well as adhesive powder, are placed between the two layers of release paper. The release paper isolates the adhesive dry fiber strips, and the outer roller 21 will not stick to the roller 21.

[0030] like Figure 1 , Figure 2As shown, this invention utilizes functional units such as an unwinding mechanism 1, a powder spreading mechanism 2, a heating and pressurizing mechanism 3, a winding mechanism 4, a slitting mechanism 5, and a waste collection mechanism 6 to achieve improvements from the initial unwinding of fiber materials to uniform powder spreading, as well as the adhesion stability of the powder on the surface of the dry fiber tape and the finishing of the finished product. The powder spreading mechanism 2 ensures precise powder spreading and quantitative control, solving the problem of uneven powder spreading. The heating and pressurizing mechanism 3 uses precise pressing and temperature control to ensure that the powder layer 03 reliably adheres to the fiber surface, thereby improving the mechanical properties and processing stability of the composite material. Release paper is used to isolate the dry fiber tape, felt, and powder, preventing the powder from sticking to the roller 21 during the composite bonding process, which would affect the production of the dry fiber tape and its efficiency. Finally, the winding mechanism 4 winds up the release paper, the slitting mechanism 5 cuts the dry fiber tape to the required width and removes edge waste, the winding mechanism 4 winds up the finished product, and the waste collection mechanism 6 removes waste. Through the precise design of the powder spreading mechanism 2 and the coordinated operation of the multi-functional modules, high uniformity and quantitative accuracy of powder spreading are achieved, overcoming the problems of poor powder spreading effect and quality fluctuation in traditional processes. The addition of release paper avoids adhesion to the roller 21, thereby improving production efficiency.

[0031] To improve the evenness of powder application, such as Figure 3 As shown, the powder-spreading mechanism 2 includes a roller 21 with roller needles 22 on its surface, a feed bin 23 for conveying powder onto the roller 21, and a powder-sweeping component 24 disposed on the powder output side of the roller 21. The powder-sweeping component 24 is used to sweep the powder off the roller 21. The roller needles 22 are evenly distributed on the surface of the roller 21. The height and position of the roller needles 22 are precisely controlled in the early stage, and the rotation of the roller 21 allows the powder to adhere to the surface of the roller needles 22 in a set amount, completing the quantitative output. In order to further optimize the powder distribution effect, the powder-sweeping component 24 is in contact with the surface of the roller 21 and slides along the axial direction of the roller 21, sweeping the powder adhering to the roller surface and evenly spreading it onto the surface of the fiber belt. The powder-sweeping component 24 avoids powder accumulation or blank areas in the powder-spreading fiber area. The powder-spreading mechanism 2 can make the powder fully cover the surface of the fiber belt, forming a uniform and stable powder layer 03. The contact between the feed bin 23 and the roller 21 also ensures the stability of the powder transmission process, accurately controls the amount of powder transmitted, and further improves the uniformity of powder spreading.

[0032] In some embodiments of the present invention, such as Figure 4As shown, the feed inlet 23a of the feed bin 23 is in contact with the surface of the roller 21. On the side of the roller 21 that rotates outward, the feed inlet 23a also has a metering plate 23a1 that abuts against the end of the needle roller 22. The metering plate 23a1 abuts against the end of the needle roller 22, allowing for strict control of the powder flow rate and preventing excessive or insufficient powder output. The metering plate 23a1 enables quantitative and precise powder distribution. When the roller 21 rotates, the needle roller 22 gradually outputs powder and limits the thickness of the powder adhering to the surface of the roller 21. The position of the metering plate 23a1 extending into the feed inlet 23a is adjustable, allowing the powder output to be flexibly matched according to the specific needs of the fiber belt. This ensures the uniformity of the powder distribution process, improves the accuracy of powder distribution, and overcomes the problem of poor powder distribution effect caused by human error or mechanical limitations in traditional powder distribution methods.

[0033] Furthermore, the side of the metering plate 23a1 facing the conveying bin 23 can be configured as a stepped surface, that is, the thickness of the contact end between the metering plate 23a1 and the needle roller 22 is less than the thickness of the other end, and the two are connected by a stepped surface. When the remaining powder flow rate in the conveying bin 23 is small, the roller 21 rotates and drives the outer needle roller 22 to push the contact end of the metering plate 23a1, so that the powder deposited on the metering plate 23a1 can be vibrated and fall along the stepped surface into the gap of the needle roller 22, avoiding the long-term accumulation of powder in the angle gap between the conveying bin 23 and the metering plate 23a1, and ensuring the powder output effect in the conveying bin.

[0034] To ensure that no powder remains when it falls onto the dry fibers in the above technical solution, such as... Figure 5 As shown, the powder sweeping assembly 24 includes a brush 24a that can slide relative to the roller shaft 21 along its axial direction. The bristles of the brush 24a pass through the roller needle 22 and are in contact with the surface of the roller shaft 21. The fact that the bristles of the brush 24a can pass through the roller needle 22 and are in contact with the roller surface ensures that excess powder on the roller surface can be completely swept off by the bristles. The swept-off powder no longer accumulates on the roller surface, but is evenly distributed on the fiber belt, effectively avoiding quality problems caused by uneven powder spreading. The brush 24a can slide relative to the roller shaft 21 along its axial direction, making the powder sweeping more thorough, effectively improving the powder spreading efficiency and reducing powder waste.

[0035] The powder is evenly spread on the dry fiber tape and then heated to achieve lamination. To improve the adhesion of the powder during the lamination process, in some embodiments of the present invention, such as... Figure 1As shown, it also includes a preheating mechanism 7 disposed between the powder spreading mechanism 2 and the heating and pressurizing mechanism 3. The preheating mechanism 7 is disposed on the surface of the dry fiber belt and is used to preheat the dry fiber belt. Specifically, the preheating mechanism 7 includes multiple heating tubes, which are evenly arranged and disposed along the running path of the dry fiber belt. The distance between the heating tubes and the dry fiber belt is adjusted according to the temperature that the dry fiber belt needs to reach, so that the dry fiber belt after passing through the preheating mechanism 7 can directly enter the heating and pressurizing mechanism 3. The preheating mechanism 7 uniformly heats the surface of the dry fiber belt, so that the fiber belt reaches a temperature range suitable for powder adhesion, thereby significantly improving the adhesion effect of the powder on the surface of the fiber belt after spreading. The moderate heating of the fiber belt surface softens or activates the powder particles to a certain extent, further enhancing the adhesion between the powder and the fiber, creating good initial conditions for the subsequent bonding and composite bonding in the heating and pressurizing stage, ensuring the integrity and uniformity of the powder layer 03, and optimizing the physical properties and chemical stability of the fiber material through preheating, greatly improving the overall strength and durability of the composite material.

[0036] To adapt the pressure to different fiber tape thicknesses and material types, while maintaining flexibility and precision, in some embodiments of the present invention, both the heating roller assembly 31 and the cooling roller assembly 32 include a first roller 33 rotatably connected to the first roller 33, and a second roller 34 that can be adjusted and fixed relative to the first roller 33. The first roller 33 and the second roller 34 are used to press the dry fiber tape. The heating and pressing mechanism 3 also has an active drive component 35 for controlling the conveying speed of the dry fiber tape. Specifically, the second roller 34 is driven by a cylinder, applying pressure towards the first roller 33 and forming a space between it and the first roller 33 for the dry fiber tape to pass through. The rotatably connected first roller 33 provides support for the dry fiber tape, while the second roller 34, which can move relative to the first roller 33 and be fixed at different heights, ensures continuous pressure output. The relative adjustment structure of the second roller 34 allows for flexible adjustment of its position according to the fiber tape thickness and bonding requirements, enabling the pressure to be accurately transmitted to the surface of the fiber tape, thereby improving the adaptability and efficiency of the hot pressing and cooling operations. The heating roller assembly 31 uses a temperature-controlled heating device to apply a certain temperature to the fiber belt and powder layer 03, achieving stable powder melting and fiber belt bonding. The cooling roller assembly 32, on the other hand, uses a cooling device to reduce the temperature of the bonded fiber belt, allowing the adhesive layer to solidify quickly and ensuring its structural strength and adhesion. The active drive component 35 controls the conveying speed throughout the heating and pressurizing process. The conveying speed is coordinated with the hot pressing pressure, heating temperature, and cooling efficiency, thereby avoiding the quality instability problems caused by fixed speed in traditional bonding processes.

[0037] To address the challenges of waste disposal, low waste removal efficiency, and the impact of waste accumulation on production line stability during fiber tape processing, the waste collection mechanism 6 includes a baffle 61 mounted on the slitting mechanism 5. The baffle 61 separates edge waste from the dry fiber tape. It also includes a conveying assembly 62 for collecting edge waste. The conveying assembly 62 includes a perforation 62b for the edge waste to pass through and a conveying drive 62a for moving the edge waste. Specifically, the baffle 61 is positioned outside the width of the dry fiber tape. Edge waste cut by the cutter 51 passes through the outside of the baffle 61, separates from the dry fiber tape body, and then passes through the perforation 62b into the conveying drive 62a. The conveying drive 62a then drives the removal of the edge waste. The baffle 61 is mounted on the slitting mechanism 5 and is integrated with the cutting process of the finished fiber tape to achieve rapid separation of edge waste, ensuring a clear boundary between waste and finished tape, avoiding potential contamination or interference from waste to the finished fiber tape, and optimizing the winding effect and cutting quality of the finished product. The baffle 61 structure, combined with the conveying component 62, provides an independent conveying path for waste. The perforations 62b of the conveying component 62 not only guide the flow of waste but also adapt to the shape and size of the waste, ensuring that the waste can enter the conveying system quickly and stably. The conveying drive component 62a optimizes the waste transportation process, achieving smooth and continuous conveying by precisely controlling the movement speed of the waste, avoiding waste accumulation at one end of the production line and interfering with the overall operation, providing a highly efficient automation solution, while ensuring the stability and cleanliness of the production line operation.

[0038] According to a second aspect of the present invention, a method for quantitatively applying powder to dry fiber strips is also provided, such as... Figure 10 , Figure 11 As shown, it includes the following steps: S10: The dry fiber tape, felt and release paper are continuously unwound by the unwinding mechanism 1 located along the dry fiber tape production line; S20: Use the powder spreading mechanism to evenly spread powder onto the surface of the dry fiber belt in two directions; S30: The dry fiber belt is heated and pressurized using the heating roller group 31 to bond and composite the powder with the felt and the dry fiber belt, and then the dry fiber belt is cooled down using the cooling roller group 32. S40: The release paper is wound up and the composite dry fiber tape is cut. The finished product is wound up by the dry fiber tape finished product winding assembly 42, and the waste is collected by the waste collection mechanism 6.

[0039] Based on the different number of layers required for the actual finished dry fiber tape, the quantity and position of the dry fiber tape, felt, and release paper are set. Two layers of release paper are used, one on each side of the overall dry fiber tape. This prevents the powder from sticking to the roller 21 during heating, and the unwinding method avoids the problems of uneven tension and intermittent material supply in traditional processes, ensuring the integrity and stability of the fiber tape from the start of production. At the start of the unwinding operation, the powder thickness of the powder-spreading mechanism 2 is adjusted to ensure uniform powder spreading. After powder spreading, the heating roller group 31 and cooling roller group 32 are introduced to efficiently complete the bonding and composite of the powder with the fiber tape and felt layer. Through precise temperature control and pressure adjustment, the powder is fully melted and evenly adhered to the fiber surface, significantly improving the mechanical properties and service life of the composite material. The cooling stage rapidly reduces the temperature of the fiber tape, allowing the adhesive layer to solidify and form, ensuring consistent product quality and avoiding the instability of the adhesive layer caused by uneven heat treatment in traditional processes. Finally, the release paper is separated, and the dry fiber tape is wound up to complete the production process.

[0040] Based on the above technical solutions, such as Figure 11 As shown, the powder-spreading mechanism 2 evenly spreads powder onto the surface of the dry fiber belt, and also includes the following steps: S21: The powder is quantitatively and continuously conveyed to the surface of the roller 21 of the powder spreading mechanism 2 through the conveying bin 23; S22: The powder output is controlled by the contact between the metering plate 23a1 and the needle roller 22, so as to control the uniform spreading to the dry fiber belt. S23: The powder is swept by the powder sweeping assembly 24 which is slidable along the roller shaft 21 to ensure that the powder does not accumulate and is evenly covered on the surface of the dry fiber belt.

[0041] First, powder is conveyed to the surface of roller 21 through the feeding bin 23, ensuring continuous powder output and stable flow rate, thus avoiding powder spreading defects caused by intermittent or unbalanced feeding in traditional processes. Next, the contact design between the metering plate 23a1 and the roller needle 22 further limits the powder output, allowing the powder thickness or flow rate to be precisely adjusted according to the processing requirements of the fiber belt, ensuring that the amount of powder covering each unit area of ​​the fiber belt is consistent, improving the accuracy of powder spreading, and reducing powder waste through flexible quantitative control. In addition, the powder sweeping component 24, with the sliding brush 24a as its core, moves dynamically along the roller 21, ensuring that the remaining powder on the roller surface can be evenly spread onto the fiber belt, avoiding fiber belt surface defects caused by powder accumulation or blank spreading areas. The contact between the powder sweeping component 24 and the roller 21, as well as the brush bristles cleaning the surface of the roller needle 22 and the roller 21, further enhances the uniformity of powder spreading, minimizing the powder accumulation problem in traditional processes. The powder spreading mechanism 2 of the present invention, with the help of the synergistic action of the roller 21, the needle roller 22 and the metering plate 23a1, enables the powder output to be dynamically adapted, fully meeting the process requirements of different types of fiber belts. Compared with the traditional manual spreading method, the powder sweeping component 24 eliminates the error in manual operation through the automatic processing mode of the sliding brush 24a, making the powder distribution more uniform and greatly improving the adhesion quality of the fiber belt surface.

[0042] In some embodiments of the present invention, the powder-spreading mechanism 2 adjusts the powder output by adjusting the height of the needle roller 22 and the rotation speed of the roller 21. The height of the needle roller 22 and the rotation speed of the roller 21 are calculated and set based on the target powder weight per square meter of dry fiber belt. The height of the needle roller 22, as a core parameter determining the thickness of the powder layer 03, can limit the maximum powder adhesion by adjusting its contact distance with the roller 21, ensuring the stability of powder output. The rotation speed of the roller 21 is synchronized with the running speed of the fiber belt. By adjusting the rotation speed, the powder spreading speed is precisely matched to the movement rhythm of the fiber belt, achieving a dual improvement in spreading efficiency and quality. By pre-setting the target powder weight per square meter of dry fiber belt, combined with the basic calculations of the needle roller 22 height and roller 21 rotation speed, a feedback dynamic control system is formed, enabling the powder-spreading mechanism 2 to autonomously adjust the powder amount for different fiber materials or production needs. The present invention can adapt to complex composite material production scenarios, ensuring the consistency of powder coverage thickness in different parts of the fiber belt, providing technical assurance for the production of high-quality composite materials.

[0043] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A dry fiber tape quantitative powder spreading composite device, characterized in that, include: The unwinding mechanism includes a dry fiber tape unwinding assembly, a felt unwinding assembly, and a release paper unwinding assembly, which are installed at the workstations along the dry fiber tape production line. The powder-spreading mechanism is located at the station before the release paper unwinding assembly and is used to evenly spread powder onto the surface of the dry fiber belt. The heating and pressing mechanism is located at the station after the release paper unwinding assembly, and includes a heating roller group that rolls and presses the dry fiber belt, and a cooling roller group located at the station below the heating roller group. The winding mechanism includes release paper winding assemblies and dry fiber tape finished product winding assemblies installed at the workstations along the dry fiber tape production line. The slitting mechanism is located at the next station after the release paper winding assembly. It cuts the dry fiber strip according to the required width and includes multiple cutters that can be moved to relatively different positions. A waste collection mechanism is used to collect the edge waste removed by the cutting mechanism; The dry fiber belt, which is subjected to the heating and pressurizing mechanism, sequentially includes a first release paper layer, a first felt layer, a powder layer, a second felt layer, a dry fiber belt layer, and a second release paper layer.

2. The dry fiber tape quantitative powder spreading composite device according to claim 1, characterized in that, The powder-spreading mechanism includes a roller shaft with needle rollers on its surface, a feed bin for conveying powder onto the roller shaft, and a powder-sweeping assembly disposed on the side of the roller shaft where the powder is output. The powder-sweeping assembly is used to sweep the powder off the roller shaft.

3. The dry fiber tape quantitative powder spreading composite device according to claim 2, characterized in that, The feed inlet of the feed hopper is in contact with the surface of the roller shaft, and the feed inlet also has a metering plate on the side of the roller shaft that abuts against the end of the needle roller.

4. The dry fiber tape quantitative powder spreading composite device according to claim 3, characterized in that, The powder sweeping assembly includes a brush that can slide relative to the roller shaft along the axial direction, the bristles of the brush passing through the needle roller and fitting against the surface of the roller shaft.

5. The dry fiber tape quantitative powder spreading composite device according to claim 4, characterized in that, It also includes a preheating mechanism disposed between the powder spreading mechanism and the heating and pressurizing mechanism. The preheating mechanism is disposed on the surface of the dry fiber belt and is used to preheat the dry fiber belt.

6. The dry fiber tape quantitative powder spreading and compounding device according to claim 4, characterized in that, Both the heating roller assembly and the cooling roller assembly include a first roller rotatably connected to the first roller, and a second roller whose assembly position can be adjusted relative to the first roller. The first roller and the second roller are used to press the dry fiber belt. The heating and pressing mechanism also has an active drive component for controlling the conveying speed of the dry fiber belt.

7. The dry fiber tape quantitative powder spreading composite device according to claim 4, characterized in that, The waste collection mechanism includes a stop bar disposed on the slitting mechanism, the stop bar being used to separate the edge waste from the dry fiber belt, and also includes a conveying assembly for collecting the edge waste, the conveying assembly including perforations for the edge waste to pass through, and a conveying drive for pulling the edge waste to move.

8. A method for quantitatively applying powder to dry fiber strips, characterized in that, Using the dry fiber tape quantitative powder spreading and compounding device as described in any one of claims 4 to 7 includes the following steps: The dry fiber tape, felt and release paper are continuously unwound and wound separately by the unwinding mechanism located along the dry fiber tape production line. Use a powder-spraying mechanism to evenly spread powder onto the surface of the dry fiber belt; The dry fiber tape is heated and pressurized using a heating roller assembly to bond the powder with the felt and dry fiber tape. Then, the dry fiber tape is cooled down using a cooling roller assembly. The release paper is wound up, and the composite dry fiber tape is cut. The finished product is wound up by the dry fiber tape finished product winding assembly, and the waste is collected by the waste collection mechanism.

9. The method for quantitatively applying powder to dry fiber tape according to claim 8, characterized in that, The powder-spreading mechanism evenly spreads powder onto the surface of the dry fiber belt, and further includes the following steps: The powder is quantitatively and continuously conveyed to the roller surface of the powder spreading mechanism through the feeding hopper; The powder output is controlled by the contact between the metering plate and the needle roller, so as to ensure uniform distribution to the dry fiber belt; The powder is swept using a powder sweeping assembly that slides along the roller axis to ensure that the powder does not accumulate and is evenly covered on the surface of the dry fiber belt.

10. The method for quantitatively applying powder to dry fiber tape according to claim 9, characterized in that, The powder-spreading mechanism adjusts the powder output by adjusting the height of the roller needles and the rotation speed of the roller shaft. The height of the roller needles and the rotation speed of the roller shaft are calculated and set based on the target powder weight per square meter of dry fiber belt.

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