Dry fiber band compounding device and method

Abstract

The invention relates to the technical field of composite materials, in particular to a dry fiber band compounding device and method.The dry fiber band compounding device comprises a fiber band unwinding and winding mechanism and a fiber band winding mechanism, and the fiber band unwinding and winding mechanism comprises a fiber band unwinding assembly and a fiber band winding assembly; the powder spreading mechanism uniformly spreads powder towards the direction of the fiber belt; the two felt unwinding mechanisms are used for conveying felt materials to the upper layer of the fiber belt and the upper layer of the powder; the two release paper unwinding and winding mechanisms comprise a release paper unwinding assembly and a release paper winding assembly; the heating and pressurizing mechanism comprises a heating roller group and a cooling roller group, and is used for heating and applying pressure to the fiber belt, the powder and the felt between the two pieces of release paper; the hole pricking mechanism comprises needle rollers which can be relatively close to or far away from each other towards the fiber belt, and pointed needles are arranged on the needle rollers. According to the invention, through high coordination of powder sprinkling, heating and punching, roller gaps and applied pressure in the compounding process are accurately controlled, so that the compactness of a dry fiber belt is moderate, the permeability of a material in vacuum infusion is improved, and the high-quality mechanical property and application effect of a finished product are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite materials, and in particular to a dry fiber tape compounding device and method. BACKGROUND

[0002] The compounding technology of dry fiber tape refers to a process of combining a dry fiber master tape with a surface felt, sprinkling resin powder on the surface, and then fixing the material through heating and pressing. Subsequently, through cooling, shaping, and slitting and winding, a composite material structure with stable performance is formed. This composite material is often used in application scenarios that require high strength and light weight, especially in high-tech fields such as aerospace and automobile manufacturing.

[0003] However, in the prior art, the pressure applied during the compounding process is difficult to accurately control. Too little pressure will cause the dry fiber tape to be fluffy, thereby affecting the mechanical properties of the material; and too much pressure will make the fibers too dense, thereby affecting the permeability of the resin in the subsequent vacuum infusion process, making it difficult to form an effective resin flow channel in the composite material, which may result in uneven infusion process, affecting the performance and application reliability of the final material.

[0004] Therefore, there is an urgent need for a new technical solution to accurately control the roller gap and the pressure applied during the compounding process, ensure that the dry fiber tape has moderate density, improve the permeability of the material in the vacuum infusion process, and ensure the high-quality mechanical properties and application effect of the finished composite material. SUMMARY

[0005] In view of at least one of the above technical problems, the present application provides a dry fiber tape compounding device and method, which improves the density of the dry fiber tape and improves the permeability of the material in the vacuum infusion process through structural improvements.

[0006] According to a first aspect of the present application, a dry fiber tape compounding device is provided, comprising: A fiber tape unwinding and winding mechanism, including a fiber tape unwinding assembly arranged at a first station, and a fiber tape winding assembly arranged at the last station, the fiber tape unwinding assembly and the fiber tape winding assembly being sequentially arranged with a powder sprinkling mechanism, a heating and pressing mechanism, and a punching mechanism between them, and the fiber tape unwinding assembly and the fiber tape winding assembly being connected by a fiber tape; The powder sprinkling mechanism uniformly sprinkles powder towards the fiber tape, and the weight of the powder sprinkled by the powder sprinkling mechanism is adjustably set; A felt unwinding mechanism, having two, and being arranged at the previous station and the next station of the powder sprinkling mechanism respectively, to deliver felt material to the upper layer of the fiber tape and the upper layer of the powder; The release paper unwinding and winding mechanism has two groups, each of which comprises a release paper unwinding assembly arranged at a working position before the heating and pressing mechanism and a release paper winding assembly arranged at a working position after the heating and pressing mechanism, one group of release paper is arranged below the fiber belt, and the other group of release paper is arranged above the fiber belt, powder and felt; The heating and pressing mechanism comprises a rack and a heating roller group and a cooling roller group arranged on the rack, and the fiber belt, powder and felt between the two release papers are heated and pressed to be compounded. The punching mechanism is arranged at a working position after the release paper winding assembly and comprises needle rollers which can relatively approach or move away from each other towards the fiber belt, and the needle rollers are uniformly provided with sharp needles.

[0007] In some embodiments of the present application, the fiber belt unwinding assembly and the felt unwinding mechanism are controlled by a magnetic powder brake to control the unwinding tension.

[0008] In some embodiments of the present application, the heating roller group and the cooling roller group each comprise a fixed carrier roller fixed on the rack, a pressing roller shaft rotationally connected to the rack, the pressing roller shaft can relatively approach or move away from the fixed carrier roller, and the heating roller group and the cooling roller group are used to pass through the fiber belt.

[0009] In some embodiments of the present application, the pressing roller shaft is fixedly connected with a connecting plate at both ends, the connecting plate comprises a rotating shaft arranged on one side of the axis of the pressing roller shaft and rotationally connected with the rack, and a driving element arranged on the other side of the axis of the pressing roller shaft and connecting the rack and the connecting plate.

[0010] In some embodiments of the present application, the release paper unwinding assembly further comprises a monitoring assembly and a deviation correction assembly, the monitoring assembly monitors the unwinding state of the release paper in real time, when the release paper deviates from the set unwinding position, the monitoring result signal is transmitted to the deviation correction assembly, the deviation correction assembly moves the release paper unwinding assembly to the set position, and when the monitoring assembly monitors that the release paper is broken, the machine stops and an alarm is given.

[0011] In some embodiments of the present application, the punching mechanism comprises two punching carrier rollers arranged below the fiber belt, the needle rollers can relatively approach or move away from the middle position of the two punching carrier rollers, the fiber belt passes through between the punching carrier rollers and the needle rollers, and the distance from the needle rollers to the punching carrier rollers is adjustably arranged.

[0012] In some embodiments of the present application, the next working position of the punching mechanism further comprises a waste removing mechanism, which comprises a waste removing roller shaft rotationally arranged below the fiber belt and a cutting knife arranged above the fiber belt and abutting against the waste removing roller shaft, and the position of the cutting knife on the waste removing roller shaft is adjustably arranged.

[0013] In some embodiments of the present application, the waste removing mechanism further comprises a cutting mechanism, which comprises a receiving plate, a presser roller shaft and a cutting assembly, the fiber strip passes through the receiving plate and the presser roller shaft and the cutting assembly, the presser roller shaft rotates in one direction, the cutting assembly comprises a presser plate and a cutter, the presser plate and the cutter are relatively close to or far away from each other, and the cutter can move transversely on the surface of the fiber strip.

[0014] In some embodiments of the present application, the presser plate is provided with a first cutting port, the receiving plate is provided with a second cutting port of the same size at a position corresponding to the first cutting port, the length of the first cutting port is greater than the width of the fiber strip, and the cutter can pass through the first cutting port and the second cutting port.

[0015] According to the second aspect of the present application, a dry fiber strip composite method is also provided, which comprises the following steps: The fiber strip unwinding assembly unwinds the fiber strip into the device and sequentially passes through each mechanism; A felt unwinding mechanism unwinds a first layer of felt onto the surface of the fiber strip, a powder scattering mechanism scatters powder onto the first layer of felt, and another felt unwinding mechanism unwinds a second layer of felt on the powder; Two groups of release paper unwinding assemblies unwind the release paper at both ends of the heating and pressing mechanism, so that the two groups of release paper are respectively laid on the upper and lower surfaces of the fiber strip; A heating roller group heats and presses the fiber strip and the powder, and a cooling roller group cools and shapes the heated fiber strip; A punching mechanism uniformly punches holes in the composite fiber strip; A fiber strip winding assembly winds the composite fiber strip.

[0016] The application has the advantages that: the application can make the resin powder more evenly distributed on the dry fiber band by adjustable powder weight, and avoid material adhesion and deformation by the protection of the upper and lower release paper, thereby ensuring the stability of the composite material and significantly improving the production efficiency; the heating and pressing mechanism can more accurately control the pressure and gap of the fiber band during the compounding process, thereby avoiding performance problems caused by material density or looseness; the cooling device ensures the setting effect after pressure, thereby improving the operation stability and accuracy; the needle roller design of the punching mechanism uniformly opens the micro flow channel inside the fiber, thereby creating a good permeation channel for subsequent vacuum infusion, thereby significantly improving the infusion uniformity of the material and the final mechanical properties; the powdering, heating, compounding and punching are highly coordinated, the roller gap and the applied pressure during the compounding process are accurately controlled, the dry fiber band density is moderate, the permeability of the material in the vacuum infusion is improved, and the high-quality mechanical properties and application effect of the finished composite material are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1 It is a structure schematic diagram of the dry fiber band compounding device in the embodiment of the present application. Figure 2 It is a side view of the dry fiber band compounding device in the embodiment of the present application. Figure 3 It is a structure schematic diagram of the heating and pressing mechanism in the dry fiber band compounding device in the embodiment of the present application. Figure 4 It is a structure schematic diagram of another working state of the heating and pressing mechanism in the dry fiber band compounding device in the embodiment of the present application. Figure 5 It is a structure schematic diagram of the punching mechanism in the dry fiber band compounding device in the embodiment of the present application. Figure 6 It is a side view of the punching mechanism in the dry fiber band compounding device in the embodiment of the present application. Figure 7 It is a working state structure schematic diagram of the punching mechanism and the fiber band in the dry fiber band compounding device in the embodiment of the present application. Figure 8 It is a structure schematic diagram of the cutting mechanism in the dry fiber band compounding device in the embodiment of the present application. Figure 9Another working state structure diagram of the cutting mechanism in the dry fiber tape compounding device in the embodiment of the present application; Figure 10 A structure diagram of the waste removing mechanism in the dry fiber tape compounding device in the embodiment of the present application; Figure 11 A step diagram of the dry fiber tape compounding method in the embodiment of the present application.

[0019] The figure mark: 1, the fiber tape unwinding and winding mechanism; 11, the fiber tape unwinding assembly; 12, the fiber tape winding assembly; 2, the powder scattering mechanism; 3, the felt unwinding mechanism; 4, the release paper unwinding and winding mechanism; 41, the release paper unwinding assembly; 42, the release paper winding assembly; 5, the heating and pressing mechanism; 51, the rack; 52, the heating roller group; 53, the cooling roller group; 54, the fixed godet; 55, the pressing roller shaft; 55a, the connecting plate; 55a1, the rotating shaft; 55a2, the driving piece; 6, the punching mechanism; 61, the needle roller; 61a, the pointed needle; 62, the punching godet; 7, the waste removing mechanism; 71, the waste removing roller shaft; 72, the cutting knife; 8, the cutting mechanism; 81, the receiving plate; 81a, the second cutting opening; 82, the pressing roller shaft; 83, the cutting assembly; 83a, the pressing plate; 83b, the cutting knife. DETAILED DESCRIPTION

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

[0021] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions as used herein are for illustrative purposes only and are not intended to be limiting.

[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 application belongs. The terminology used in the description of the application herein is for describing particular embodiments only and is not intended to be limiting. As used in this application, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0023] As Figures 1 to 10 The dry fiber tape compounding device shown in the figure, comprising: The fiber belt unwinding and winding mechanism 1 comprises a fiber belt unwinding assembly 11 arranged at a first station, and a fiber belt winding assembly 12 arranged at a last station, a powder scattering mechanism 2, a heating and pressing mechanism 5 and a punching mechanism 6 are sequentially arranged between the fiber belt unwinding assembly 11 and the fiber belt winding assembly 12, and the fiber belt unwinding assembly 11 and the fiber belt winding assembly 12 are connected through the fiber belt. Figure 1 、 Figure 2 As shown in the figure, the dry fiber belt manufacturing method comprises the following steps: conveying the fiber belt into the device, scattering powder on the fiber belt, heating the powder to make the powder adhesive and the fiber belt composite together, pressing the composite fiber belt to make the fiber belt reach the preset thickness requirement, and punching holes on the fiber belt to provide a pouring channel for subsequent vacuum resin pouring of the fiber belt.

[0024] The powder scattering mechanism 2 uniformly scatters powder towards the fiber belt, and the scattering weight of the powder scattering mechanism 2 can be adjusted. Figure 1 、 Figure 2 As shown in the figure, the powder scattering mechanism 2 scatters powder adhesive, and the scattering amount of the powder adhesive is adjusted according to the process requirement. It should be pointed out that the powder scattering mechanism 2 has many forms, which can be gravity scattering, pneumatic jet scattering, or electric dispersion scattering through rotation or vibration.

[0025] The felt unwinding mechanism 3 has two groups and is arranged at the front and rear stations of the powder scattering mechanism 2 to convey felt to the upper layer of the fiber belt and the upper layer of the powder. Figure 1 、 Figure 2 According to the number of layers and process requirements of different dry fiber belts, one layer of felt is laid on the fiber belt, one layer of powder adhesive is scattered, and one layer of felt is laid again in the present application, and the adhesive between the felts is bonded with the fiber belt. It should be pointed out that the felt unwinding mechanism has many forms, which can realize stable unwinding speed and tension of the felt through mechanical automatic or tension control mode. It should be pointed out that the material of the felt can be replaced according to different process requirements.

[0026] The release paper unwinding and winding mechanism 4 has two groups, each comprising a release paper unwinding assembly 41 arranged at the front station of the heating and pressing mechanism 5 and a release paper winding assembly 42 arranged at the rear station of the heating and pressing mechanism 5, one group of release paper is arranged at the lower layer of the fiber belt, and the other group of release paper is arranged at the upper layer of the fiber belt, the powder and the felt. Figure 1 、 Figure 2As shown, the adhesive powder is sprinkled on the fiber band, and then the fiber band and the powder are compounded by heating, but the adhesive will stick to the roller shaft during heating, affecting production. In order to prevent the powder adhesive from sticking to the roller shaft or the adhesive from accumulating on the roller shaft during heating, release paper is placed on both sides of the roller shaft. On the one hand, the release paper can isolate the adhesive, and on the other hand, it can keep the position of the adhesive unchanged and keep the average thickness of the fiber band unchanged.

[0027] The heating and pressing mechanism 5 includes a frame 51, and a heating roller group 52 and a cooling roller group 53 arranged on the frame 51, which heat and press the fiber band, the powder and the felt between the two release papers to compound them; as Figures 1 to 4 As shown, the fiber band is heated by the heating roller group 52 to compound the adhesive and the fiber band. During heating on one side, pressure is applied on the other side to keep the average thickness of the fiber band unchanged. Then the compounded fiber band is cooled and shaped by the cooling roller group 53. It should be pointed out that the form of the heating roller group 52 has many forms, which can be an electric heating roller, a steam heating roller or other forms that can heat the fiber band. It should also be pointed out that the form of the cooling roller group 53 also has many forms, which can be a water-cooled roller, an air-cooled roller or other structures that can achieve cooling.

[0028] The piercing mechanism 6 is arranged at a position after the release paper winding assembly 42, and includes a needle roller 61 that can relatively approach or move away from the fiber band. The needle roller 61 is uniformly provided with sharp needles 61a. Figures 5 to 7 As shown, after the dry fiber band is compounded, it needs to be vacuum infused with resin. In order to make the resin infusion more uniform, the sharp needles 61a on the piercing mechanism pierce holes on the surface of the dry fiber. The needle tip of the sharp needle 61a pierces into the dry fiber, which can keep the channel needed for infusion on the dry fiber band, and will not affect the performance of the dry fiber band.

[0029] The present application can make the distribution of resin powder on the dry fiber band more uniform through adjustable powdering weight, and avoid material adhesion and deformation through the protection of upper and lower release paper, thereby significantly improving production efficiency while ensuring the stability of the composite material; the heating and pressing mechanism 5 can more accurately control the pressure and gap of the fiber band during the compounding process, thereby avoiding performance problems caused by material density or looseness; the cooling device ensures the setting effect of the compounding quality after pressing, thereby improving the operation stability and accuracy; through the design of the needle roller 61 of the punching mechanism 6, the micro flow channel inside the fiber is uniformly opened, thereby creating a good penetration channel for subsequent vacuum infusion, thereby significantly improving the infusion uniformity and final mechanical properties of the material. The various links from powdering, heating to compounding and punching are highly coordinated, the gap between the rollers and the applied pressure during the compounding process are accurately controlled, the dry fiber band density is ensured to be moderate, the permeability of the material in the vacuum infusion is improved, and the high-quality mechanical properties and application effect of the finished composite material are ensured.

[0030] In the prior art, the unwinding process usually relies on mechanical friction devices or simple tension adjusting devices, but these methods often cannot accurately control the tension, resulting in that the materials cannot be tightly combined, wrinkles or uneven tension are generated, and then the quality and performance of the final composite material are affected. The fiber band unwinding assembly 11 and the felt unwinding mechanism 3 are both controlled by a magnetic powder brake. The tension level during the unwinding process is accurately regulated by an electromagnetic method, and the core advantage thereof is that it can realize continuous and stable tension control, which helps to keep the material flat and uniform during the entire production process, and can flexibly adjust the tension size according to the production line speed and material characteristics, thereby ensuring that the fiber band and felt are tightly combined without wrinkles during pressure compounding. Compared with the traditional friction type or mechanical tension control system, the magnetic powder brake has the advantages of fast response speed, high regulation accuracy and wide control range, and the unwinding process of the fiber band and the felt becomes more controllable, and the risk of generating waste is significantly reduced, thereby optimizing the production cost.

[0031] In some embodiments of the present application, as Figure 3 , Figure 4As shown, the heating roller set 52 and the cooling roller set 53 each include a fixed carrier roller 54 fixed on the frame 51, and a press roller shaft 55 rotatably connected to the frame 51. The press roller shaft 55 can be relatively close or far away from the fixed carrier roller 54, and the distance between the press roller shaft 55 and the fixed carrier roller 54 can be adjusted according to the thickness of the fiber band. The press roller shaft 55 can be freely adjusted to accurately apply pressure to materials of different thicknesses and types, ensuring that heat and pressure are uniformly transmitted to all layers of the fiber band. The reasonable layout between the heating roller set 52 and the cooling roller set 53 ensures that the fiber band realizes a continuous and controllable heat cycle process during processing. The heating roller set 52 ensures the sufficient melting of the resin and the close compounding of the material, and the subsequent cooling roller set 53 rapidly lowers the temperature to rapidly shape the material in a pressurized state, thereby obtaining a stable composite structure.

[0032] To make the control of the press roller shaft 55 more precise, with reference to the Figure 3 , Figure 4 The press roller shaft 55 is fixedly connected with a connecting plate 55a at both ends. The connecting plate 55a includes a rotating shaft 55a1 arranged on one side of the axis of the press roller shaft 55 and rotatably connected to the frame 51, and a driving element 55a2 arranged on the other side of the axis of the press roller shaft 55 and connecting the frame 51 and the connecting plate 55a. Through the rotating shaft 55a1, the roller shaft can realize flexible rotation and fine adjustment function to accurately adjust the angle and position of the press roller, ensuring that the best pressure distribution can be realized in different production stages and material states, and also helping to adapt to the changes of different thicknesses and composite materials, making the production more adaptable. The introduction of the driving element 55a2 gives the system the ability of automatic adjustment, which can automatically adjust the position of the roller shaft and the applied pressure according to the real-time needs, ensuring that the output composite material has excellent mechanical properties and appearance quality.

[0033] The release paper protects the fiber tape during the compounding process and also protects the various rollers of the heating and pressing mechanism 5. In order to avoid the rollers from deviating due to the release paper and causing the powder adhesive to stick to the rollers, thereby affecting the production efficiency and quality of the product, the release paper is monitored during the automatic production process to detect any breaks in the paper. The release paper unwinding assembly 41 also has a monitoring assembly and a correction assembly. The monitoring assembly monitors the unwinding state of the release paper in real time. When the release paper deviates from the set unwinding position, the monitoring results are transmitted to the correction assembly, which moves the release paper unwinding assembly 41 to the set position. When the monitoring assembly detects a break in the release paper, the machine stops and an alarm is triggered. By monitoring the position and state of the release paper during unwinding in real time, the release paper is accurately arranged according to the set trajectory. Once the monitoring assembly detects that the release paper has deviated from the set unwinding position, the information is quickly transmitted to the correction assembly, which adjusts the unwinding position of the release paper accordingly to ensure that the release paper returns to the correct path in a timely manner, avoiding interruptions in the production process and waste of materials caused by deviation of the release paper, and effectively improving the continuity and stability of production. When the monitoring assembly detects a possible break in the paper, it can trigger a stop alarm in time to prevent further expansion of the fault. This not only protects the production equipment and prevents damage caused by the equipment continuing to work after the paper breaks, but also ensures that the production process can quickly recover after the problem is solved.

[0034] If the production of the fiber tape cannot provide a uniform and controllable channel structure, it will limit the flow and distribution of the resin in the material, resulting in poor permeability of the material during vacuum infusion, thereby affecting the quality and reliability of the finished product. As shown in Figures 5 to 7 The piercing mechanism 6 includes two piercing support rollers 62 arranged below the fiber tape, and the needle roller 61 can be relatively close to or away from the middle position of the two piercing support rollers 62. The fiber tape passes between the piercing support rollers 62 and the needle roller 61, and the distance between the needle roller 61 and the piercing support rollers 62 can be adjusted. The needle roller 61 is located at the middle position of the two support rollers and can be relatively close to or away from the support rollers. The fiber tape can effectively pass between the needle roller 61 and the support rollers during transmission, and the distance between the needle roller 61 and the piercing support rollers 62 can be flexibly adjusted. According to the characteristics of different materials and specific production needs, the pressure and penetration depth of the needle roller 61 can be accurately set to form appropriate channel structures on the fiber tape, which not only effectively improves the air permeability and resin permeability of the material, but also ensures the consistency and flatness of the piercing on different thickness and type of fiber materials. The adjustment distance can be adjusted in real time according to the actual situation in production, enhancing the flexibility and applicability of the production equipment, suitable for various production conditions and material types.

[0035] In the production of composite materials, the fiber tape usually has more edge material on both sides. If not removed in time, it will affect the accuracy of the subsequent process and the overall appearance of the material, leading to inconsistent product performance and affecting efficiency. Figures 5 to 7 As shown in FIG. 6, the next station of the punching mechanism 6 also has a waste removal mechanism 7, which includes a waste removal roller shaft 71 rotating below the fiber tape, and a cutting knife 72 arranged above the fiber tape and abutting against the waste removal roller shaft 71. The position of the cutting knife 72 on the waste removal roller shaft 71 is adjustably arranged. Through flexible adjustment of the position of the cutting knife 72, the efficiency and accuracy of waste treatment are improved. Through the rotating waste removal roller shaft 71, the fiber tape can be tightly attached to its surface, effectively stabilizing the position of the material when being cut, while preventing the material from sliding or moving.

[0036] In the production line of composite materials, accurate cutting of fiber tape is a key work that must be carried out after the material reaches a certain length, ensuring the standardization and consistency of the product, and improving the efficiency and quality of production. Figure 10 As shown in FIG. 7, the next station of the waste removal mechanism also has a cutting mechanism 8, which includes a receiving plate 81, a pressing roller shaft 82 and a cutting assembly 83 relatively close to or away from the receiving plate 81, and the fiber tape passes between the receiving plate 81, the pressing roller shaft 82 and the cutting assembly 83. The pressing roller shaft 82 rotates in one direction, and the cutting assembly 83 includes a pressing plate 83a relatively close to or away from the fiber tape, and a cutting knife 83b relatively transversely movable on the surface of the fiber tape. The receiving plate 81 provides a support platform to prevent the material from moving or vibrating during cutting, while the pressing roller shaft 82 continuously provides stable tension through one-way rotation, keeping the fiber tape flat and taut, and through one-way rotation, the fiber tape is prevented from moving backward. The pressing plate 83a relatively close to or away from the fiber tape fixes the fiber tape to be cut by the pressing plate 83a, and the cutting knife 83b moves transversely to cut, ensuring that each fiber tape is cut to the exact length.

[0037] In some embodiments of the present application, as shown in FIG. 8, Figure 8 , Figure 9As shown, the first cutting port is formed on the pressing plate 83a, and the second cutting port 81a of the same size is formed on the receiving plate 81 corresponding to the cutting port. The length of the first cutting port is greater than the width of the fiber strip, and the cutting knife 83b can pass through the first cutting port and the second cutting port 81a. First, the precise matching of the first cutting port and the second cutting port 81a ensures that the fiber material is firmly positioned during the cutting process and does not move or deviate laterally, so that the cutting process can focus on cutting accuracy rather than the complexity of material positioning. The length of the cutting port is greater than the width of the fiber strip, so that the fiber strip can be accurately cut even if it is slightly deviated. The cutting knife 83b can pass through the two cutting ports uniformly, thereby ensuring the flatness of the cutting line and the accuracy of the cutting position, avoiding the problems of burrs and cracks in the general cutting process, reducing the defective rate caused by equipment or material fluctuations, and helping to maintain the efficient operation of the entire production line.

[0038] According to the second aspect of the present application, a dry fiber strip composite method is also provided, as shown in Figure 11 including the following steps: S10: The fiber strip unwinding assembly 11 unwinds the fiber strip into the device and sequentially passes through each mechanism; S20: One felt unwinding mechanism 3 unwinds the first layer of felt to the surface of the fiber strip, and the powder scattering mechanism 2 scatters powder on the first layer of felt, and the other felt unwinding mechanism 3 unwinds the second layer of felt on the powder; S30: Two sets of release paper unwinding assemblies 41 unwind the release paper at both ends of the heating and pressing mechanism 5, so that the two sets of release paper are respectively laid on the upper and lower surfaces of the fiber strip; S40: The heating roller group 52 heats and processes the fiber strip and the powder, and applies pressure to make the fiber strip and the felt and the powder adhere to each other, and the cooling roller group 53 cools and shapes the heated fiber strip; S50: The punching mechanism 6 uniformly punches holes in the composite fiber strip; S60: The fiber strip winding assembly 12 winds the composite fiber strip.

[0039] The fiber tape enters the entire device system through the unwinding assembly, ensuring continuous and stable conveying. The fiber tape is guided through each processing link one by one, ensuring the continuity of the entire production process and the flat conveying of the fiber tape, reducing material tension fluctuations, thereby avoiding material overlapping or wrinkling caused by unstable wiring. Two felt unwinding mechanisms 3 successively release the felt, laying it on the upper and lower surfaces of the fiber tape. The resin powder is uniformly distributed between the first layer of felt and the second layer of felt by the powder scattering mechanism 2. The formation of the multi-layer structure and the uniform distribution of the powder not only improve the interlayer bonding performance of the composite material, but also ensure the full utilization and uniform penetration of the resin, providing a good foundation for the subsequent pressing process. The release paper unwinding assembly 41 lays release paper on the upper and lower surfaces of the fiber tape, providing isolation protection for the entire heating and pressing process. The use of release paper effectively prevents the bonded material from directly contacting the equipment, reducing equipment cleaning difficulty and equipment wear, while ensuring the surface finish of the product during heating and pressing. Through the heating roller group 52, the powder in the composite material is fully melted, bonding the layers of material. Then the cooling roller group 53 rapidly cools it, fixing the stable structure formed by the composite, providing a stable and strong bonding interface, ensuring the dimensional stability and shape retention of the product during subsequent processing, and improving the overall efficiency of the composite process. After the fiber tape is shaped, the hole processing mechanism 6 is used to process the channels. The needle roller 61 is configured to uniformly produce holes on the surface of the material. The holes improve the resin penetration performance of the composite material, optimize the flow channel configuration for the vacuum-assisted infusion process, and improve the mechanical properties and infusion uniformity of the material. After all the process flows are completed, the fiber tape is neatly wound, facilitating subsequent processing and storage. The mechanical winding process maintains the neatness and consistency of the finished material, avoiding composite material stacking or deformation, and preparing for further processing and product application.

[0040] Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A dry fiber tape composite device, characterized in that, include: The fiber tape unwinding and rewinding mechanism includes a fiber tape unwinding assembly set at a first station and a fiber tape rewinding assembly set at a last station. A powder spreading mechanism, a heating and pressurizing mechanism and a punching mechanism are sequentially arranged between the fiber tape unwinding assembly and the fiber tape rewinding assembly. The fiber tape passes between the fiber tape unwinding assembly and the fiber tape rewinding assembly. The powder-spreading mechanism evenly spreads powder toward the fiber belt, and the weight of the powder spread by the powder-spreading mechanism is adjustable. The felt unwinding mechanism has two parts, which are respectively set at the front and rear stations of the powder spreading mechanism to convey felt material to the upper layer of the fiber belt and the upper layer of the powder. The release paper unwinding and rewinding mechanism has two sets, each including a release paper unwinding assembly set at the station before the heating and pressing mechanism and a release paper rewinding assembly set at the station after the heating and pressing mechanism. One set of release paper is set on the lower layer of the fiber belt, and the other set of release paper is set on the upper layer of the fiber belt, powder and felt. The heating and pressurizing mechanism includes a frame, and a heating roller group and a cooling roller group arranged on the frame, which heat and apply pressure to the fiber strip, powder and felt between the two release papers to perform composite bonding; The punching mechanism is located at a station after the release paper winding assembly, and includes a needle roller that can be relatively close to or away from the fiber belt, with pointed needles evenly arranged on the needle roller.

2. The dry fiber tape composite device according to claim 1, characterized in that, Both the fiber tape unwinding assembly and the felt unwinding mechanism are controlled by a magnetic powder brake to control the unwinding tension.

3. The dry fiber tape composite device according to claim 1, characterized in that, Both the heating roller assembly and the cooling roller assembly include a fixed support roller fixed on the frame and a pressure roller shaft rotatably connected to the frame. The pressure roller shaft can be relatively close to or far away from the fixed support roller. The heating roller assembly and the cooling roller assembly are used to pass a fiber belt.

4. The dry fiber tape composite device according to claim 3, characterized in that, The pressure roller shaft is fixedly connected to both ends of a connecting plate. The connecting plate includes a rotating shaft disposed on one side of the axis of the pressure roller shaft and rotatably connected to the frame, and a driving component disposed on the other side of the axis of the pressure roller shaft and connecting the frame and the connecting plate.

5. The dry fiber tape composite device according to claim 1, characterized in that, The release paper unwinding assembly also includes a monitoring component and a correction component. The monitoring component monitors the release paper unwinding status in real time. When the release paper deviates from the set unwinding position, the monitoring result signal is transmitted to the correction component, which moves the release paper unwinding assembly to the set position. When the monitoring component detects a release paper breakage, a stop alarm is triggered.

6. The dry fiber tape composite device according to claim 1, characterized in that, The punching mechanism includes two punching rollers disposed below the fiber belt. The needle roller can be positioned relatively close to or away from the middle of the two punching rollers. The fiber belt passes between the punching roller and the needle roller. The distance between the needle roller and the punching roller is adjustable.

7. The dry fiber tape composite device according to claim 1, characterized in that, The next station of the punching mechanism also has a waste removal mechanism, including a waste removal roller shaft that rotates below the fiber belt, and a cutting knife disposed above the fiber belt and abutting against the waste removal roller shaft. The position of the cutting knife on the waste removal roller shaft is adjustable.

8. The dry fiber tape composite device according to claim 7, characterized in that, The next station of the waste removal mechanism also has a cutting mechanism, including a receiving plate, a pressing roller shaft and a cutting assembly that can be relatively close to or far away from the receiving plate, the fiber belt passing between the receiving plate and the pressing roller shaft and the cutting assembly, the pressing roller shaft rotating in one direction, and the cutting assembly including a pressure plate that can be relatively close to or far away from the fiber belt, and a cutter that can be relatively laterally moved on the surface of the fiber belt.

9. The dry fiber tape composite device according to claim 8, characterized in that, The pressure plate has a first cutting opening, and the receiving plate has a second cutting opening of the same size at a position corresponding to the cutting opening. The length of the first cutting opening is greater than the width of the fiber belt, and the cutter can pass through the first cutting opening and the second cutting opening.

10. A method for composite dry fiber tape, characterized in that, Using the dry fiber tape composite device as described in any one of claims 1 to 9 includes the following steps: The fiber tape unwinding assembly unwinds the fiber tape into the device and passes it through each mechanism in sequence; One felt unwinding mechanism unwinds the first layer of felt onto the surface of the fiber belt, a powder spreading mechanism spreads powder onto the first layer of felt, and another felt unwinding mechanism unwinds the second layer of felt onto the powder; Two sets of release paper unwinding assemblies unwind release paper at both ends of the heating and pressurizing mechanism, so that the two sets of release paper are respectively laid on the upper and lower surfaces of the fiber belt. The heating roller group heats the fiber belt and powder and applies pressure to make the fiber belt, felt and powder adhere and bond together. The cooling roller group cools and shapes the heated fiber belt. The punching mechanism punches holes evenly on the composite fiber tape; The fiber tape is wound up and combined by the fiber tape winding assembly.

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