WO2022007038A1

WO2022007038A1 - Method and apparatus for preparing unidirectional fiber-reinforced resin body having regular cross section

Info

Publication number: WO2022007038A1
Application number: PCT/CN2020/104978
Authority: WO
Inventors: 朱华平; 田宇飞; 沃晓剑
Original assignee: 江苏奇一科技有限公司
Priority date: 2020-07-10
Filing date: 2020-07-27
Publication date: 2022-01-13
Also published as: CN111745857A; CN111745857B

Abstract

A method and apparatus for preparing a unidirectional fiber-reinforced resin body having a regular cross-section. A die head (3) extruding melt resin extrudes a thermoplastic resin, which forms a cascade-shaped film layer and is poured onto a hot melt resin applying guide roller (4). A continuous fiber (1) passes along the hot melt resin applying guide roller (4), combines with the uniform resin on the hot melt resin applying guide roller (4), passes through multiple stages of open-ended continuous fiber and hot melt resin rolling and impregnation apparatuses which are arranged in parallel and in serial connection, and then passes through a splitting mold cavity (84), a bundling mold cavity (86) and a cooling-shaping mold cavity (87) to form at least one bundle of fusion sub-unit of the continuous fiber and the hot melt resin.

Description

A kind of preparation method and equipment of unidirectional fiber reinforced resin body with regular cross section

technical field

The invention belongs to the technical field of long-fiber reinforced thermoplastic composite materials, and in particular relates to a preparation method and equipment for a unidirectional fiber reinforced resin body with regular cross-section and fixed length.

Background technique

Various types of fiber-reinforced resin composite materials are gradually replacing traditional metal materials, and are widely used in many fields requiring lightweight, including aircraft, automobiles and other vehicles.

With the development of fiber reinforced thermoplastic composites, long glass fiber reinforced polypropylene (LFT) has been gradually promoted due to its excellent physical properties. Widely used in transportation, military and civil aviation, petrochemical, sports equipment, building materials and many other fields. It has achieved the goals of light weight, high strength, corrosion resistance, recyclability, and convenient processing and molding. Because of its excellent comprehensive performance, the industry has flourished.

At present, the LFT technology on the market mainly uses the yarn roll, spread the yarn, and then infiltrate the die head, and then pull and pelletize it. However, the die head infiltration can easily lead to problems such as broken glass fiber and hairiness. At the same time, the die head infiltration is due to Its molding mechanism requires the glass fiber to pass through the infiltration tank, and it is difficult to achieve a glass fiber content of more than 60%. At the same time, the flame retardants on the market such as polyphosphates have poor temperature resistance, and the die head Wetting must be carried out at high temperature, resulting in easy decomposition of the flame retardant in the wetting die, and the flame retardant performance of LFT long glass fiber cannot be achieved.

The preparation process and preparation equipment of the unidirectional fiber reinforced resin body with regular cross-section and fixed length proposed by the present invention, the unidirectional continuous fibers do not need to pass through the extruder, avoid the situation of fiber damage, and the content is not affected by the extruder Limitation control, there is a very large adjustment space, processing temperature, material residence time, etc. can meet the high temperature requirements of flame retardants, can be made into 30% to 85% LFT products, and can be made into flame retardant reinforced LFT materials .

SUMMARY OF THE INVENTION

In order to achieve the above purpose, the present invention proposes a method and equipment for preparing a unidirectional fiber reinforced resin body with regular cross-section, which is a pattern structure in which a hot-melt resin coating guide roller and multiple stages are arranged in series in parallel and alternately. An open continuous fiber and hot-melt resin roll impregnation device composed of impregnation unit modules; a group of extrusion equipment dies coats the hot-melt resin on the surface of the hot-melt resin coating guide roller by extrusion to form a A hot-melt resin film layer with uniform layer thickness; the hot-melt resin coating guide roller is driven independently, and its rotation speed can be set independently. A layer of hot-melt resin film with uniform thickness on the surface of the guide roller is applied on a row of unidirectional continuous and uniformly flattened fiber bodies;

Subsequently, a row of unidirectional continuous uniformly flattened fiber bodies initially fused by the hot melt resin enters into multi-level parallel interaction, and the open continuous fibers and hot melt resin rollers composed of the series-arranged character structure impregnate the coating unit modules. Press-impregnated coating device; to achieve full and effective fusion of hot-melt resin and fiber;

Subsequently, the continuous fiber and the hot-melt resin are fused and impregnated into the unit, and at least one group of unidirectional fiber-reinforced resin body sub-units with regular cross-section is made by splitting, integrating and cooling the shaping cavity device along its width direction;

Finally, the unidirectional fiber-reinforced resin body subunits with regular cross-sections are cut into unidirectional fiber-reinforced resin bodies with regular cross-sections of a certain length by a transverse cutting device.

Further, a set of hot-melt resin coating guide rollers and a set of extrusion equipment die head devices are respectively arranged on the upper and lower sides of a row of unidirectional continuous and uniformly flattened fiber bodies; the upper and lower hot-melt resin coating guide rollers are respectively provided Continuously coat the hot-melt resin provided by a corresponding set of extrusion equipment dies on the surface of the hot-melt resin coating guide roller to form a hot-melt resin film layer with uniform thickness; apply hot-melt resin through the upper and lower layers The rotating motion of the guide rollers respectively applies a layer of hot-melt resin film with uniform thickness on the surface of the upper and lower hot-melt resin smear guide rollers on the top and bottom of a row of unidirectional continuous and uniformly flattened fiber bodies. On both sides; a row of unidirectional, continuous and evenly flattened fiber bodies initially fused with hot-melt resin enters into multi-level parallel interaction, and the open continuous fibers composed of impregnating unit modules with character structure arranged in series are rolled with hot-melt resin. Impregnation device to achieve full and effective fusion of hot-melt resin and fiber body;

Further, a group of hot-melt resin coating guide rollers and a group of extrusion equipment die head devices are arranged on the upper part of a row of unidirectional continuous and uniformly flattened fibrous bodies; A set of hot-melt resin extrusion equipment die head device is set; through the rotation of the upper hot-melt resin coating guide roller, a uniform thickness of hot-melt resin film layer coated on the surface of the hot-melt resin coating guide roller is spread on the A row of unidirectionally continuous and uniformly flattened fibers is on the upper side; at the same time, a set of extrusion equipment dies are arranged at the lower part of a row of unidirectionally continuous and uniformly flattened fibers to uniformly extrude and apply the hot-melt resin to a row of uniformly flattened fibers. Unidirectional continuous uniformly flattened fiber lower side;

Further, the reference plane of the die outlet lip of the extrusion equipment is parallel to the axis of the hot-melt resin coating guide roller, and the hot-melt resin coating guide roller surface is used as the benchmark, and the extrusion equipment is set according to the set angle and gap. the position of the extrusion die for the hot-melt resin film; the setting range of the gap between the outlet lip of the extrusion die of the hot-melt resin film of the extrusion equipment and the surface of the hot-melt resin coating guide roller is 0.1-10 mm; the extrusion equipment The angle between the hot melt resin film extrusion die and the horizontal plane is set in the range of 10 to 150 degrees;

Further, the open continuous fiber and hot-melt resin roll impregnation device is composed of a plurality of impregnation unit modules with a character structure, which are arranged in series in a staggered and parallel manner; each impregnation unit module is composed of three groups of impregnation and applicator rollers. It is arranged in a character structure; the impregnation unit modules of the character structure composed of three groups of applicator rollers are respectively arranged in two forms: the character structure of the genuine character and the character structure of the inverted character; the impregnation unit module is based on the structure of the genuine character and character And the structure of the inverted pin character is in the form of a series, in an interval, parallel, and staggered arrangement;

Further, by adjusting the positions of the top applicator rollers of the genuine character dipping unit module and the dipping applicator rollers at the bottom of the inverted character dipping unit module, the center distance between the three groups of dipping and applicating rollers of each dipping and applicating unit module can be adjusted. Adjust the setting; by adjusting the center distance of the dip coating roller of the dip unit module, set a row of unidirectional continuous and evenly flattened fibers and the wrapping angle of the coating roller; a row of unidirectional continuous and uniformly flattened fibers and the genuine character structure The wrapping angle of the coating roller at the top of the dipping unit module, or the set range of the wrapping angle of the coating roller at the bottom of the dipping unit module with the inverted character structure is 15 to 180°;

Further, by adjusting the center distance of the applicator rollers of the unit module, the adjustment and setting of the gap between the roller surfaces of the three groups of applicator rollers of each dipping unit module are realized; The gap between the adjacent two groups of dipping applicator roller surfaces, or the gap between the bottom applicator roller of the same inverted structure dipping unit module and the adjacent two groups of applicator roller surfaces is set in the range of 0.1 to 15mm; The adjustment of the center distance of the rollers and the setting of the gap between the dipping and coating rollers of the unit module can obtain the proper fiber tension required for the effective fusion of a row of unidirectional, continuous and evenly flat fibers with the hot-melt resin, as well as the fusion of the hot-melt resin. pressure between tightly packed bundles of fibers;

Further, the hot-melt resin coating guide roller and each group of rollers constituting the impregnation unit modules at all levels are provided with built-in heating structures; the built-in heating can be a tubular electric heating element inserted into the inner cavity of the roller; or a liquid heating medium passing through the built-in channel of the roller ; For example, hot oil is used as the heating medium, and the shaft head end on the transmission side is connected with the external heat source through the rotary joint device;

Further, in each dipping and smearing unit module, the shaft head rotating support pair at both ends of the applicator roller at the top of the genuine character or the bottom of the inverted character are respectively connected with the linear moving transmission pair that can move linearly, so as to realize the realization of each character unit module. Individual adjustment of the center distance of the three dipping applicator rollers; further, the shaft head of each group of impregnating applicator rollers adopts sprockets or gears to transmit the rotational motion on the transmission side;

Further, the upper and lower parts of the open continuous fiber and hot-melt resin roll impregnation device composed of the series-arranged character structure impregnation and coating unit modules can be respectively provided with multiple sets of radiant heating devices to provide heat. The heat required for effective fusion of the hot-melt resin with a row of unidirectionally continuous and uniformly flattened fibers through the multi-stage, alternately parallel, and series-connected dipping and coating unit modules. ;

Further, the beam splitting, integration, and cooling and shaping mold cavity device adopts at least one group of mold cavity units that integrate beam splitting, integration, and cooling and shaping. The adjacent continuous sheet-type unidirectional fiber reinforced resin body sub-units are also arranged in a corresponding staggered arrangement in the height direction;

Further, using at least one group of longitudinally separating and shaping cooling cavity units, a row of continuous fibers and the hot-melt resin fusion unit body are uniformly separated along its width direction, and at least one sheet-type unidirectional fiber-reinforced resin body subunit is separated;

Further, a group of longitudinally separated and shaped cooling cavity units is composed of a pair of rollers whose surfaces are concave and convex; wherein, the rollers have a built-in cooling water flow channel; and are connected with a temperature-adjustable cold water system;

Further, the split-bundle mold cavity divides the continuous fiber unit fused with the hot-melt resin into at least one group of unit bundles effectively fused with the hot-melt resin along its width direction; wherein, the split-bundle mold cavity, along the The cross-sectional size in the length direction is continuously decreasing;

Further, the beam splitting cavity is open;

Further, at least one group of unit bundles fused with continuous fibers and hot-melt resin respectively pass through the integrated mold cavity at the corresponding position, and carry out the regular cross-section pressing and shaping of the unidirectional fiber reinforced resin body; wherein, the integrated mold cavity is formed along its length. The cross-sectional dimension of the direction is a continuously decreasing geometric cylinder; the integrated mold cavity is provided with at least one set of raised steps along its length to enhance the thermal compression of the unit bundle fused with the continuous fiber and the hot-melt resin; cooling and shaping The mold cavity fuses at least one group of integrated continuous fibers and hot-melt resin units, respectively, through cooling and shaping mold cavities with built-in cooling water channels, and further pressing, cooling and shaping the unidirectional fiber reinforced resin unit bundles;

Further, the beam splitting and integrated cavity devices are respectively provided with heat source devices with adjustable temperature; wherein, the heat source of the heat source device includes an electric heating tube or a liquid heat transfer medium; the cooling and shaping mold cavity has a built-in cooling water flow channel, and Connected to a temperature-adjustable chiller.

Further, it also includes a flattening device, which forms a row of continuous fiber bodies composed of multiple bundles of fiber bundles to form tension on the fiber bundles at a set wrapping angle, and is in contact with the geometric curved surface of the yarn passing member to achieve alignment. Multiple bundles of continuous fiber bodies are regularly and uniformly flattened along its width direction; wherein, the back of the yarn passing member is provided with a reinforcing structure; the built-in jacking member of the back reinforcing structure is used to adjust the vertical direction of the yarn passing member along its geometric generatrix. The arching degree and fix it; the arching degree of the yarn passing member along the vertical direction of its geometric generatrix, or the setting value range of the mysterious height based on the process center line of the production line preparation equipment is 0.05 ~ 5.0mm; the back structure reinforcement parts, At least two sets of jacking mechanisms are provided; the jacking mechanism is supported by the reinforcing member to adjust the arching degree of the geometric curved surface of the yarn passing member; at the same time, the yarn passing member is connected and fixed with the reinforcing member; the yarn passing member Appropriate cross-sectional geometry of the area in contact with a row of continuous fibers consisting of multiple bundles of fibers in an angle-wrapped manner, including semicircular, partial arc, full circle or SIGN curve; the yarn passing member is provided with built-in heating elements The built-in heating element can be a tubular electric heating element inserted into the inner cavity of the yarn passing member; or use a liquid heating medium to heat through the channel provided by the yarn passing member;

Further, the flattening device is composed of three groups of components; wherein, two groups are yarn passing members with fixed positions, and a group of yarn passing members whose positions are adjustable, and are arranged according to a V-shaped structure; wherein, by adjusting the V-shaped structure The position of the yarn-passing flattening member at the bottom, changing the center distance between the three groups of members, and changing the wrap angle between the fiber body and the working unit member and the tension of the fiber body;

Further, it also includes an electrification device that uses a friction member made of a material different from the fiber body to generate the same charge on the friction of the fiber body; wherein, the friction member material includes a metal material of copper, steel or aluminum alloy, or a ceramic , nylon or hard rubber non-metallic materials;

Further, the friction member performs repeated contact friction motions on the surface of a row of unidirectionally continuously flattened fiber filaments through the actuator; through the frictional motion, identical filaments are generated between each fiber filaments in a row of unidirectionally continuously flattened fiber filaments. The repulsive force between the charges further implements the uniform flattening of a row of unidirectional continuous filaments;

Further, the geometric structure of the head of the friction member in contact with the surface of a row of unidirectionally continuously flattened filaments includes a sphere, a hemisphere, a spheroid, a cylinder, a semi-cylinder, a small semi-cylinder, or a continuous three-dimensional geometric surface. , or a continuous two-dimensional geometric surface;

Further, the actuator for driving the friction member unit includes a driving element powered by electric, pneumatic or hydraulic power.

The present invention also provides a method for preparing a unidirectional fiber reinforced resin body with regular cross-section, which comprises the following steps:

S1: Through a set of yarn release shafts configured by the creel, the tension of each bundle of fiber bundles can be set separately, and multiple bundles of fibers are synchronously sent into the unidirectional continuous fiber primary carding device, and then the fluffy fiber bundles are processed through an oven;

S2: Through the tension action of the fiber ordered tension flattening device, the continuous fiber tows arranged in multiple bundles are evenly spread out along the geometric surface of the tension roller; The repulsive force of the same charge to each other completes the further uniform flattening of the continuous fiber bundles arranged in multiple bundles;

S3: a group of extrusion equipment dies coats the extruded hot-melt resin on the surface of the hot-melt resin smear guide roller by smearing to form a hot-melt resin film layer with a uniform thickness;

S4: through the rotational motion of the hot-melt resin coating guide rollers, synchronously coat a layer of hot-melt resin film with a uniform thickness on the surface of a group of hot-melt resin coating guide rollers in a row of one-way continuous uniform spreading on flat fibers;

S5: A row of unidirectional continuous and uniformly flattened fibers initially fused with the hot-melt resin enters a multi-stage serial, parallel-interactive, open continuous fiber and hot-melt resin roll impregnation device to realize the integration of the hot-melt resin and the fiber. effective integration;

S6: After the continuous fibers and the hot-melt resin are effectively fused, a row of unidirectional continuous and evenly flat fiber bodies is evenly divided into at least one bundle of continuous fibers and The sub-unit for fusion of hot-melt resin; then through the integration and cooling of the molding cavity unit device, at least one bundle of continuous fibers and the sub-unit for fusion of the hot-melt resin are made; Unidirectional fiber-reinforced resin body with regular cross-section and fixed length with high fiber content.

The present invention also provides a method for preparing a fixed-length, sheet-type high-fiber-content unidirectional fiber-reinforced resin body, comprising the following steps:

S6: After the continuous fibers and the hot-melt resin are effectively fused, a row of unidirectional continuous and evenly flattened fiber bodies is driven by the main traction, and continuously passes through at least one set of longitudinal separation and shaping cooling devices, and the row of continuous fibers and the hot-melt resin are continuously separated. The resin fusion unit is evenly separated along its width direction; after that, it is cut by a cross-cutting device according to a set length to make a sheet-type unidirectional fiber reinforced resin body of fixed length.

By adopting the above technical scheme, the effect achieved by the present invention is: to produce a unidirectional fiber reinforced resin body with a regular cross-section and a fixed length with high fiber content.

Description of drawings

Fig. 1 is an embodiment of the present invention using a hot melt resin extrusion die head arranged on both sides and a hot melt resin coating guide roller and a multi-stage serial, parallel alternating, open continuous fiber and hot melt resin roll impregnation coating Schematic diagram of the structure of the device combination;

Figure 1a is a schematic structural diagram of a set of hot-melt resin extrusion dies and hot-melt resin coating guide rollers arranged on one side according to an embodiment of the present invention;

Fig. 1b is a schematic structural diagram of a hot-melt resin extrusion die head arranged on the top and bottom according to an embodiment of the present invention, and a hot-melt resin coating guide roller is provided on the lower part;

1c is a schematic structural diagram of a hot-melt resin extrusion die head arranged on the top and bottom according to an embodiment of the present invention, and a hot-melt resin coating guide roller is provided on the upper part;

2 is a schematic structural diagram of a module roller of a genuine character structure impregnating unit according to an embodiment of the present invention;

Fig. 3 is the structural schematic diagram of the dipping unit module roller of the inverted character structure according to the embodiment of the present invention;

4 is a schematic diagram of the layout of a production process preparation equipment for a unidirectional continuous fiber reinforced resin composite material according to an embodiment of the present invention;

FIG. 5 is a splitting, integration, cooling and shaping device for making a sheet-type fiber-reinforced resin body according to an embodiment of the present invention;

FIG. 6 is a beam-splitting, integration and cooling and shaping device for making a fiber-reinforced resin body with a regular cross-section according to an embodiment of the present invention;

7 is a front view of a group of flattening unit modules according to an embodiment of the present invention;

8 is a side view of a group of flattening unit modules according to an embodiment of the present invention;

Fig. 9 is the front view of the friction fiber electrification device of the embodiment of the present invention;

10 is a top view of the friction fiber electrification device according to the embodiment of the present invention;

Fig. 11 is a force analysis diagram of the tension change before and after the fiber passes through the flattening roller according to the embodiment of the present invention

Among them, 1. a row of continuous fibers composed of multiple bundles of fiber bundles, 2. flattening unit, 21, the first group of flattening unit modules, 22, the second group of flattening unit modules, 23, the third group of flattening units Module, 24, yarn passing member, 25, back structure reinforcing member, 26, jacking mechanism, 3, die head for extruding molten resin, 31, die head for extruding molten resin set at the lower part of continuous fiber, 4, heat Molten resin coating guide roller, 41. Hot melt resin coating guide roller arranged at the lower part of the continuous fiber, 5. Genuine character structure impregnation unit module, 6. Inverted character structure impregnation unit module, 7. Cooling device, 80, yarn unwinding frame , 81, carding frame, 82, oven, 83, friction fiber electrification device, 83-1, friction member, 83-2, reciprocating motion mechanism, 84, beam split cavity, 84-1, heating of split beam cavity Channel, 85, Heat Insulation Structure, 86, Integrated Mold Cavity, 86-1, Heating Channel for Integrated Mold Cavity, 87, Cooling Mold Cavity, 87-1, Cooling Channel for Cooling Mold Cavity, 88, Crawler Traction Mechanism, 88-1, Opposing Roller Traction Mechanism, 89, Transverse Cutting Mechanism, 90, Longitudinal Separation and Forming Cooling Device, 90-1, Roller whose surface is concave and convex.

detailed description

The present invention will be further described below through specific embodiments. The following examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the following examples.

Example 1

As shown in FIG. 4, multiple rolls of continuous fibers are loaded on the yarn release frame 80, and then each fiber is pulled to the carding frame 81 to form a row of continuous fibers 1 composed of multiple fiber bundles, and then pass through the first The flattening unit module 21 is set, and the fibers are preliminarily expanded and the level of each yarn is limited to the same level, and then a row of continuous fibers 1 composed of multiple fiber bundles passes through the oven 82, and the fiber surface is used for bonding the fiber bundles. Part of the sizing agent is baked off, which is conducive to further yarn spreading. After the continuous fiber 1 comes out of the oven 82, it enters the second group of flattening unit modules 22, and then to the friction fiber electrification device 83, and then to the third group of flattening units. Module 23, at this time, the continuous fiber 1 has been unfolded to a perfect state without visible gaps to the naked eye, and is ready for the next step of infiltration process with resin;

After the thermoplastic resin is heated by the extruder and extruded through the die 3 for extruding the molten resin, it becomes a waterfall-like layer of film and is showered on the hot-melt resin coating guide roller 4, and the continuous fiber 1 passes through the guide roller 4 and contacts with it. And there is a certain wrapping angle, which is combined with the uniform resin on the smear guide roller, and then passes through the multi-level parallel interaction composed of the genuine character structure impregnation unit module 5 and the inverted character structure impregnation unit module 6, and the open type is arranged in series. The continuous fiber and the hot-melt resin are rolled and impregnated to obtain a molten product in which the fiber and the resin are fully fused, and then pass through the beam-splitting cavity 84, and are evenly divided into at least one bundle of the continuous fiber and the hot-melt resin. The subunits fused; Then, by integrating 86 and cooling and shaping 87 modular unit devices, at least one bundle of the continuous fiber and hot-melt resin fusion sub-units is made; after that, after passing through the pulling device 88, a cross-cutting device 89 is used, according to the set length. Cut to make the unidirectional fiber reinforced resin body with regular cross section and fixed length with high fiber content.

In this embodiment, the continuous fiber adopts the 2400TEX untwisted continuous fiber with the brand name of 362CYF from Jushi Group, the main material of the resin is polypropylene material (PP), the melting index is 50-110g/10min, and the main material polypropylene 10 is added. % amount of compatibilizer, its function is to increase the bonding strength of polypropylene (PP) and glass fiber, its main component is grafted maleic anhydride, and 0.3% of antioxidant is added, of course, those skilled in the art should understand , the continuous fiber materials described herein include but are not limited to those stated herein, such as glass fiber, carbon fiber, aramid fiber, etc.; fiber-reinforced thermoplastic resins that are compatible with it include but are not limited to those stated herein, such as Polypropylene resin PP, polyethylene resin PE, polyester resin PET, nylon resin PA6 or PA66, PC resin, PEEK resin, PPS resin, etc. The corresponding related additives include but are not limited to other antioxidants , UV absorbers, light stabilizers, lubricant additives, etc.

In this embodiment, each roll of fiber on the yarn unwinding rack 80 is equipped with a tension control device, which can adjust the tension of a single roll of fibers individually, and can also realize the adjustment of the overall tension. height adjustable;

In this embodiment, the carding frame 81 is a device similar to a comb, each fiber passes through a slit, and the position of each fiber in the width direction after the fibers drawn from the yarn release frame pass through the carding frame 81 is fixed, so that multiple bundles of fibers form a row of uniform and ordered continuous fibers 1;

4, 7 and 8, in this embodiment, there are three sets of flattening unit modules 21, 22, 23, and each module consists of three sets of yarn passing members 24 that are in contact with the continuous fibers and generate a certain wrap angle and its corresponding back reinforcement structural member 25, wherein, the yarn passing member is provided with a built-in heating structure, and the heating structure adopts electric heating as the heating element, and the setting temperature is 80-110 ° C; Lifting mechanism 26; these jacking mechanisms 26 can realize the function of adjusting the degree of arching of the yarn passing member 24 with the reinforcing member 25 as the support, and at the same time, play the role of connecting and fixing the yarn passing member 24 and the reinforcing member 25. In the embodiment, the degree of arching, that is, the distance between the roller surface at the middle position of the yarn passing member after the arching is adjusted to the reinforcing structure member is adjusted to 1mm; The moving yarn passing members 24 are arranged in a V-shaped structure, and the center distance between the three groups of members can be adjusted through the movement of the movable yarn passing members 24, thereby changing the wrapping angle between the passing fibers and the working unit members. , adjust the tension of the fiber, the principle of adjusting the tension and the size of the adjustment are calculated as follows:

As shown in Figure 11, the force analysis diagram of the tension change of the fiber before and after the flattening roller regards the contact part between the fiber and the roller as a point (the intersection of the X axis and the Y axis in the figure), and analyzes its mechanical properties: The tension F ₁ in the direction of the roll, the tension F ₂ after the roll, the supporting force F _N of the roll to the fiber, and the friction force F _{f of the} roll to the fiber, the direction of which is shown in the figure above, defines the wrapping angle of the fiber on the roll. Half is θ, the angle shown by the 30° angle in the figure.

Among them, the friction force F _f = μF _N , μ is the friction coefficient ① formula

For the projection of each force on the X-axis, there are: F ₂ cosθ=F ₁ cosθ+F _f ②Formula

For the projection of each force on the Y axis, there are: F ₂ sinθ+F ₁ sinθ=F _N ③ formula

It is defined that the tension after the fiber passes through the roll is k times that before the roll, that is, F ₂ =kF _{1 ④Formula}

From ① to ④, we can get:

Since a set of V-shaped rollers has 3 rollers, the tension increases by k ³ times after passing through a set of rollers. Take θ as 30°, that is, the wrap angle is 60°. According to the data search, the friction coefficient between glass fiber and steel is about 0.2. Here, if the value is 0.2, then k=1.26, k ³ =2.0, that is, the fiber passes through a group of each After the wrap angle on the roller is 60°, the tension of the V-type tension roller is increased by about two times.

After the above calculation, it can be seen that the tension of the fiber will increase by about two times each time it passes through a set of flattening unit modules. After 3 sets, the tension will nearly reach 8 times that before passing through the flattening unit module, which conforms to the principle of gradual unfolding, and The same applies to the subsequent smearing process consisting of multi-group character structure impregnation unit modules. With the gradual increase of tension, the wettability of fibers and resins is gradually improved.

In this embodiment, the oven 82 adopts an infrared heating method, which is composed of multiple groups of ceramic infrared heaters, with a total length of about 1 m, and a width greater than the total width of the fibers after unfolding. The distance from the fiber surface is 1-10 cm. The temperature is up to 490°C.

In this embodiment, a friction fiber electrification device 83 is arranged between the second group of flattening unit modules 22 and the third group of flattening unit modules 23, which is composed of a friction member 88 and a reciprocating mechanism 89; In the example, a copper block is used, and the copper block reciprocates and rubs on the surface of a row of unidirectionally continuously flattened fiber filaments; the design principle is that, through friction, a row of unidirectionally continuously flattened fiber filaments 1 have the same charge to obtain The repulsive force between adjacent filaments is generated between the same charge, which improves the uniformity of the flattened filaments; 1/4 spherical shape of the pointed shape. In addition, the driving method of the reciprocating mechanism is driven by a motor.

As shown in Figure 4, in this embodiment, the set temperature of the extruder from the screw part to the melt pump to the connecting area part connected to the die and finally to the extrusion die 3 part is 190°C to 270°C. With the increase of temperature, the melt flow rate of the resin will increase. The increase of the melt flow rate is beneficial to the degree of infiltration of fibers and resins, but too high temperature will cause the resin to turn yellow, decompose and age, etc., so it is necessary to find A suitable temperature selection range, of course, the different selection of materials, the temperature setting range also needs to be changed, for example, PA or PC materials with a higher melting point cannot be set to a temperature as low as 190 °C, and the extrusion equipment die head to The extruded hot-melt resin is coated on the roller surface of the hot-melt resin coating guide roller 4 by the coating method to form a hot-melt resin film layer with uniform thickness; then the hot-melt resin coating guide roller 4 moves through its rotation to synchronize The uniform resin film layer is coated on a row of unidirectional continuous uniformly flattened fibers 1, wherein the rotational movement of the hot-melt resin coating guide roller 4 is controlled by a separate motor, and its rotational speed is set to make the roller surface rotate. The linear speed is lower than the running speed of the fiber. In this example, the roller surface linear speed of the hot-melt resin coating guide roller 4 is set to 6 to 10 m/min, and the running speed of the fiber, that is, the pulling speed, is set to 15 to 25 m/min. In addition, the hot-melt resin coating guide roller 4 is connected with a heating device. In this example, the heat-conducting oil is used for heating. The heat-conducting oil is controlled by an oil temperature machine, and the temperature is set to 200-250°C. The applicable range is different, and the set temperature needs to be adjusted according to the material.

In this embodiment, a row of unidirectional, continuous and evenly flattened fibers initially fused with the hot-melt resin after passing through the hot-melt resin coating guide roller 4 enters the impregnating unit module 5 with the genuine character structure and the impregnating unit module with the inverted character structure. 6. The multi-level parallel interaction, the open continuous fiber and the hot-melt resin roll impregnation device arranged in series, complete the effective fusion of the hot-melt resin and the fiber, wherein, each character structure impregnation unit module is the same as the hot-melt resin. The smear guide roller also has a motor to control the speed. In this example, the linear speed of the roller surface is set to 10~15m/min, and there is a heating method. In this example, the method of heating the heat transfer oil is selected. The temperature is set to 200~250℃. Similarly, when different resin materials are selected, the temperature range is different. The temperature needs to be adjusted according to the material. Refer to the fiber in the fiber unwinding unit module before and after the roller with a certain wrap angle to the fiber. It can be concluded that the tension of the continuous fiber 1 is gradually increased and the wettability is gradually improved when the continuous fiber 1 passes through the multi-stage parallel interaction, the open continuous fiber arranged in series and the hot-melt resin roll impregnation device.

4 and 5, in this embodiment, under the driving force of the main traction 88-1, a row of unidirectional, continuous and evenly flattened fibers 1 passes through the longitudinal separation, shaping and cooling device 90, and is separated into several The continuous fiber reinforced resin body in sheet form is then passed through the pulling 88-1 and the cross-cutting device 89 after pulling to make the final product: a sheet type, fixed-length unidirectional fiber reinforced resin body with high fiber content.

Example 2

A row of continuous fibers 1 formed by the multiple rolls of continuous fibers loaded on the yarn unwinding rack 80 after passing through the carding rack 81, passes through three groups of flattening unit modules 21, 22, 23, as well as an oven 82 and a friction fiber electrification device 83, forming a row of continuous fibers 1. A row of continuous fibers 1 with good spread and uniformity interacts with the thermoplastic molten resin extruded by the extruder through the hot-melt resin coating guide roller 4 and multi-stage parallel, and the open continuous fibers arranged in series are connected with the hot-melt resin. After the resin rolls and impregnates the device, it is fully infiltrated, and finally it is separated, cooled, and shaped to form an integrated mold cavity unit device: the longitudinal separation and shaping cooling device 90, which is composed of multiple groups of surfaces with concave and convex surfaces. The coupled rollers 90-1 are combined to uniformly separate the row of continuous fibers and the hot-melt resin fusion unit along its width direction; separate at least one of the sheet-type unidirectional fiber-reinforced resin subunits , and finally the final product is obtained by means of the pressing roller-type pulling device 88-1 and the transverse cutting device 89: a piece of the sheet-type unidirectional fiber-reinforced resin body

In this example, carbon fiber is used for the continuous fiber, PA66 is used for the resin, the temperature of the extruder from the screw to the extrusion die is set at 240-310°C, the hot-melt resin coating guide roller 4 and the multi-stage parallel interaction, and the opening of the series arrangement The temperature of the continuous fiber and hot-melt resin rolling impregnation device is set to 260-300 ° C, the pulling speed is set to 10-15 m/min, and the roller surface linear speed of the hot-melt resin coating guide roller 4 is set to 5-7 m/min, Multi-stage parallel interaction, open continuous fiber and hot-melt resin roll impregnation device arranged in series, the roller surface speed is set to 7 ~ 10m/min, the roller surface speed of the non-pulling roller in contact with the continuous fiber before cooling The reason why it is set to be slower than the pulling speed, that is, the running speed of the fiber, is because if it is set to be the same as the pulling speed or even faster than the pulling speed, the broken hairiness on the fiber will wind up on the roller surface and accumulate more and more. When the speed of the continuous fiber is faster than the speed of the hot roller surface in contact with it, the roller surface and the fiber move relatively, so even if the hairiness is wrapped around the roller surface for a moment, the continuous fiber is very The hairiness can be taken away quickly, so that it will not become more and more entangled.

As shown in Fig. 1a, the difference from Example 1 is that a hot-melt resin extrusion die 3 and a hot-melt resin coating guide roller 4 are only set above a row of unidirectionally continuously and uniformly flattened fibers 1, and are guided by hot-melt resin coating The rotational movement of the rollers 4 spreads the hot melt resin onto the continuous fibers 1 .

As shown in Fig. 1b, in another embodiment of this example, a second hot-melt resin extrusion die 31 is arranged below a row of unidirectionally continuous and uniformly flattened fibers 1, and the upper hot-melt resin extrusion die is 3. Apply the hot-melt resin evenly on the continuous fibers, and the lower hot-melt resin extrusion die 31 evenly spreads the hot-melt resin on the hot-melt resin coating guide roller 4, and applies the hot-melt resin to the guide roller 4 through the hot melt resin. The rotational motion spreads the hot melt resin onto the continuous fibers.

As shown in Fig. 1c, as in another embodiment of this example, a second hot melt resin extrusion die 31 is provided below a row of unidirectionally continuous and uniformly flattened fibers 1, and the upper hot melt resin extrusion die The head 3 evenly spreads the hot-melt resin on the hot-melt resin coating guide roller 4, and spreads the hot-melt resin on the continuous fiber through the rotating motion of the hot-melt resin coating guide roller 4, and the hot-melt resin extrusion die head below 31. Evenly spread the hot-melt resin on the continuous fiber 1.

4 and 6 , in this embodiment, a row of unidirectional, continuous and evenly flattened fibers 1 fully fused with the hot-melt resin, under the driving force of the main traction 88, undergo beam splitting in sequence, The integrated and cooling sizing device, wherein the cross-sectional dimension of the mold cavity of the beam splitting device 84 along its length direction is continuously decreasing and open, and a heat source device 84-1 is arranged in the device, and the integrated mold cavity is along its length. The size of the cross-section in the direction is also continuously decreasing, and the cross-section is closed, and at least one set of raised steps is arranged along its length direction to enhance the heat to the unit bundles fused with the continuous fibers and the hot-melt resin. Pressed together, and a heat source device 86-1 is arranged therein, and a cooling water channel 87-1 is built into the cooling and shaping die cavity.

After passing through the cooling and shaping device 87, the produced unidirectional fiber-reinforced resin body with a regular cross-section and high fiber content passes through a pulling device 88 and a cross-cutting device 89 to make the final product: a regular cross-section, fixed-length high-fiber reinforced resin body. Fiber content Unidirectional fiber reinforced resin body.

The specific embodiments of the present invention are described above in detail, and it should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present invention shall fall within the protection scope determined by the claims.

Claims

A preparation equipment for a unidirectional fiber-reinforced resin body with regular cross-section is characterized in that, an open-type structure composed of a hot-melt resin coating guide roller and multi-stage impregnating unit modules with a character structure arranged in series and alternately in parallel is used. Continuous fiber and hot melt resin roll impregnation device;

A group of extrusion equipment die heads coat the hot-melt resin on the surface of the hot-melt resin coating guide roller by extrusion to form a hot-melt resin film layer with uniform thickness;

The hot-melt resin coating guide roller is driven independently, and its rotation speed can be set independently. Through the rotational movement of the hot-melt resin coating guide roller, a layer of uniform thickness on the surface of a group of hot-melt resin coating guide rollers is synchronously applied. The hot-melt resin film layer is applied on a row of unidirectional continuous and uniformly flattened fiber body;

A row of unidirectional continuous uniformly flattened fiber bodies initially fused with hot-melt resin enters into a multi-stage series-connected parallel and alternately arranged pattern structure to impregnate open continuous fibers composed of hot-melt resin roll impregnation The coating device realizes the full and effective fusion of the hot-melt resin and the fiber.

At least one group of bundled, integrated, cooling and shaped cavity unit devices are used to fuse continuous fibers with hot-melt resin to impregnate the unit, and separate at least one group of continuous unidirectional fiber-reinforced resin sub-units along its width direction.
The equipment for preparing a unidirectional fiber-reinforced resin body with a regular cross-section according to claim 1, wherein a set of hot-melt resin smears are respectively provided on the upper and lower sides of a row of unidirectional continuous and uniformly flattened fiber bodies. Guide roller and a set of extrusion equipment die head device;

The hot-melt resin provided by the corresponding group of extrusion equipment dies is continuously coated on the surface of the hot-melt resin coating guide roller through the upper and lower hot-melt resin coating guide rollers, respectively, to form a layer of hot-melt resin with uniform thickness. film layer;

Through the rotation of the upper and lower hot-melt resin applicator guide rollers, a layer of hot-melt resin film with uniform thickness applied on the roller surfaces of the upper and lower hot-melt resin applicator guide rollers is applied in a row of one-way continuous and uniform layers. The upper and lower sides of the flattened fibrous body;

A row of unidirectional, continuous and evenly flattened fibrous bodies coated with hot-melt resin on the upper and lower sides respectively enters into a multi-stage series, and the open continuous fibers and hot-melt fibers are composed of the character structure impregnating unit modules arranged in parallel and alternately. The resin roll impregnation device realizes the full and effective fusion of the hot-melt resin and the fiber body.
The equipment for preparing a unidirectional fiber-reinforced resin body with regular cross-section according to claim 1, wherein a set of hot-melt resin coating guide rollers and a set of extrusion rollers are arranged on the upper part of a row of unidirectional continuous and uniform fibrous bodies. At the same time, a set of hot-melt resin extrusion equipment die-head devices are only set at the lower part of a row of unidirectional continuous and uniformly flattened fiber bodies. A layer of hot-melt resin film with uniform thickness covering the surface of the hot-melt resin coating guide roller is coated on the upper side of a row of unidirectionally continuous and uniformly flattened fibers. The lower part of the flat fiber A set of extrusion equipment dies uniformly extrudes and spreads the hot-melt resin on the lower side of a row of unidirectionally continuous uniformly flattened fibers.
The equipment for preparing a unidirectional fiber-reinforced resin body with a regular cross-section according to claim 1, wherein the reference plane of the exit lip of the extrusion equipment die is parallel to the axis of the hot-melt resin coating guide roller, and is formed by The surface of the hot-melt resin coating guide roller is used as the benchmark. According to the setting range of the gap between the die outlet lip of the extrusion equipment and the surface of the hot-melt resin coating guide roller, the setting range is 0.1-10 mm. The angle setting range is 10-150° angle, and the position of the extrusion die of the hot-melt resin film of the extrusion equipment is set.
The equipment for preparing a unidirectional fiber-reinforced resin body with a regular cross section according to claim 1, wherein the open continuous fiber and hot-melt resin roll impregnation device is an impregnation unit module with a multi-character structure , composed of staggered and parallel arrangement in series, each dipping unit module is arranged by three groups of dipping applicator rollers in a character structure;

The impregnation unit module of the character structure composed of three groups of applicator rollers has two layout forms, the genuine character structure and the inverted character structure. The dipping unit module is based on the genuine character structure and the inverted character In series, in spaced, parallel and staggered arrangement;

By adjusting the positions of the top applicator roller of the dipping and applicating unit module of the genuine character and the dipping applicator roller at the bottom of the dipping and applicating unit module of the reverse character, the adjustment of the center distance between the three groups of dipping and applicating rollers of each dipping and applicating unit module is realized.
The equipment for preparing a unidirectional fiber reinforced resin body with a regular cross-section according to claim 5, characterized in that, by adjusting the center distance of the dipping and coating rollers of the dipping unit module, a row of unidirectional continuous and uniform flattening is arranged. The wrapping angle of the fiber and the applicator roller; the wrapping angle of a row of unidirectional continuous and evenly flat fibers and the wrapping angle of the applicator roller at the top of the impregnation unit module with the genuine character structure, or the wrapping angle of the applicator roller at the bottom of the impregnation unit module with the inverted character structure. Range 15～180° angle;

By adjusting the center distance of the applicator rollers of the unit module, the adjustment and setting of the gap between the roller surfaces of the three groups of applicator rollers of each dipping unit module are realized; The gap between the roller surfaces of the two groups of dipping and applicator rollers, or the gap between the bottom applicator roller of the same inverted structure dipping unit module and the adjacent two groups of applicator roller surfaces is set in the range of 0.1 to 15mm;

By adjusting the center distance of the dipping and coating rollers of the unit module and setting the gap between the dipping and coating rollers of the unit module, a row of unidirectional, continuous and evenly flattened fibers required for effective fusion with the hot-melt resin can be obtained. The tension, and the pressure of the hot melt resin into the tightly packed bundles of fibers.
The equipment for preparing a unidirectional fiber reinforced resin body with a regular cross-section according to claim 1, wherein the hot-melt resin coating guide roller and each group of rollers constituting the impregnation unit modules at all levels are provided with built-in heating structures; The heating can be a tubular electric heating element inserted into the inner cavity of the roller; or a liquid heating medium through a channel built into the roller.
The equipment for preparing a unidirectional fiber reinforced resin body with a regular cross-section according to claim 1, wherein the shaft heads at both ends of the applicator roller at the top of the genuine character or the bottom of the inverted character of each dip-coating unit module are rotatably supported The pair is respectively connected with the linear moving transmission pair that can move in a straight line, so as to realize the independent adjustment of the center distance of the three dipping and applicating rollers of each character unit module group. Or gears transmit rotational motion.
The equipment for preparing a unidirectional fiber-reinforced resin body with a regular cross-section according to claim 7, characterized in that the open continuous fibers composed of multi-stage series, parallel and alternately arranged fret structure impregnation and smearing unit modules and The upper and lower parts of the hot-melt resin rolling impregnation device are respectively provided with multiple sets of radiant heating devices to provide hot-melt resin and a row of unidirectional continuous and evenly flattened fibrous bodies. The heat required to effectively fuse the hot melt resin application with the row of flattened fibers during the unit module process.
The equipment for preparing a unidirectional fiber-reinforced resin body with a regular cross-section according to claim 1, characterized in that it further comprises a flattening device, which is a row of continuous fiber bodies composed of multiple fiber bundles to set The tension formed by the wrapping angle of the fiber bundles, and through the contact with the geometric curved surface of the yarn-passing member, the regular and uniform flattening of the multi-bundle continuous fiber body along the width direction of the yarn-passing member is realized;

The back of the yarn-passing member is provided with a reinforcing structure, and the arching degree of the yarn-passing member along the vertical direction of its geometric generatrix is adjusted and fixed through the built-in jacking member of the back reinforcing structure; The arching degree, or the mysterious height, is set in the range of 0.05 to 5.0 mm based on the process center line of the production line preparation equipment;
The equipment for preparing a unidirectional fiber reinforced resin body with a regular cross section according to claim 10, wherein the back structure reinforcing part is provided with at least two sets of jacking mechanisms, and the jacking mechanisms are supported by the reinforcing members and adjust The degree of arching of the geometric curved surface of the yarn passing member, and at the same time, the yarn passing member and the reinforcing member are connected and fixed;

Appropriate cross-sectional geometry curve of the contact area between the yarn passing member and a row of continuous fibers composed of multiple bundles of fiber bundles in an angle wrapping manner, including semicircle, partial arc, full circle or SIGN curve;

The yarn passing member is provided with a built-in heating element, and the built-in heating element can be a tubular electric heating element inserted into the inner cavity of the yarn passing member, or a liquid heating medium is used for heating through a channel provided by the yarn passing member.
The equipment for preparing a unidirectional fiber-reinforced resin body with a regular cross section according to claim 11, wherein the flattening device is composed of three groups of components, wherein the two groups are the position-fixed yarn passing components, and the other group The position-adjustable yarn-passing member is arranged in a V-shaped structure; by adjusting the position of the yarn-passing flattening member at the bottom of the V-shaped structure, the center distance between the three groups of members is changed, and the fiber body and the work are changed. The wrap angle of the element member and the tension of the fiber body.
The equipment for preparing a unidirectional fiber-reinforced resin body with a regular cross-section according to claim 11, characterized in that it further comprises a friction member made of a material different from the fiber body, and the friction on the fiber body generates friction The electrification device of the same charge; the friction member material includes copper, steel, aluminum alloy metal material, or ceramic, nylon, hard rubber non-metallic material;

The friction member performs repeated contact friction movement on the surface of a row of unidirectionally continuously flattened filaments through the actuator, and is generated between adjacent filaments of the fibrous body in a row of unidirectionally continuously flattened filaments through frictional movement. The repulsive force between the same charge, further implements the uniform flattening of a row of unidirectional continuous filaments

The geometric structure of the head of the friction member in contact with the surface of a row of unidirectionally continuously flattened filaments includes: a sphere, a hemisphere, a spheroid, a cylinder, a semi-cylinder, a small semi-cylinder, or a continuous three-dimensional geometric surface, or Continuous two-dimensional geometric surfaces;

The actuators that drive the friction member units include electrically, pneumatically or hydraulically powered drive elements.
The equipment for preparing a unidirectional fiber reinforced resin body with regular cross-section according to claim 1, characterized in that, at least one group of mold cavity units integrating beam splitting, integration, cooling and shaping is used; wherein, each group is separated The cooling and shaping cavity units are arranged in a staggered manner in the height direction, so that the adjacent continuous sheet-type unidirectional fiber reinforced resin body sub-units after separation are also arranged in a corresponding staggered arrangement in the height direction.
The equipment for preparing a unidirectional fiber-reinforced resin body with a regular cross-section according to claim 1, wherein at least one set of longitudinally separated shaping cooling cavity units is used to fuse a row of continuous fibers with the hot-melt resin into the unit body. At least one sheet-type unidirectional fiber-reinforced resin body subunit is uniformly separated along its width direction;

A set of longitudinally separated and shaped cooling cavity units is composed of a pair of rollers whose surfaces are concave and convex. The rollers have built-in cooling water channels and are connected to a temperature-adjustable cold water system.
The equipment for preparing a unidirectional fiber-reinforced resin body with a regular cross-section according to claim 1, characterized in that, the beam-splitting mold cavity divides the continuous fiber units fused with the hot-melt resin along its width direction. The beam cavity has a continuously decreasing cross-sectional dimension along its length;

The split-beam mold cavity is open, and the integrated mold cavity integrates at least one group of unit bundles fused with continuous fibers and hot-melt resin, respectively, through the integrated mold cavity at the corresponding position, and the unidirectional fiber-reinforced resin body is subjected to regular cross-section pressing and shaping. ; wherein, the cross-sectional dimension of the integrated cavity along its length direction is a geometric cylinder with continuously decreasing;

The integrated mold cavity is provided with at least one set of raised steps along its length direction to enhance the thermal compression of the unit bundles fused with the continuous fibers and the hot-melt resin;

Cooling and shaping mold cavity, at least one group of integrated continuous fiber and hot-melt resin fusion unit body, respectively, through the cooling and shaping mold cavity with built-in cooling water channel, further pressing, cooling and shaping of unidirectional fiber reinforced resin unit bundles .
The equipment for preparing a unidirectional fiber reinforced resin body with a regular cross-section according to claim 1, characterized in that a heat source device with adjustable temperature is respectively set in the split mold cavity and the integrated mold cavity; the heat source of the heat source device includes electric Heating tube, or liquid heat transfer medium, etc.; cooling water flow channel is built into the cooling and shaping die cavity, and it is connected with a chiller with adjustable temperature.
The method for preparing a device for preparing a unidirectional fiber-reinforced resin body with a regular cross-section according to any one of claims 1 to 17, characterized in that it includes the following steps:

S1: Through a set of yarn releasing shafts configured by the creel, the tension of each bundle of fiber bundles can be set separately, and the multiple bundles of fibers are synchronously fed into the unidirectional continuous fiber primary carding device, and then the fluffy fiber bundles are processed through the oven;

S2: Through the tension action of the fiber ordered tension flattening device, the continuous fiber tows arranged in multiple bundles are evenly spread out along the geometric surface of the tension roller; The repulsive force of the same charge to each other completes the further uniform flattening of the continuous fiber bundles arranged in multiple bundles;

S3: a group of extrusion equipment die heads coat the extruded hot-melt resin on the surface of the hot-melt resin coating guide roller by smearing to form a hot-melt resin film layer with uniform thickness;

S4: through the rotational motion of the hot-melt resin coating guide rollers, synchronously coat a layer of hot-melt resin film with a uniform thickness on the surface of a group of hot-melt resin coating guide rollers in a row of one-way continuous uniform spreading on flat fibers;

S5: A row of unidirectional continuous and uniformly flattened fibers initially fused with the hot-melt resin enters a multi-stage serial, parallel alternating, open continuous fiber and hot-melt resin roll impregnation device to realize the hot-melt resin and the fiber. effective integration;

S6: After the continuous fibers and the hot-melt resin are effectively fused, a row of unidirectional, continuous and uniformly flattened fiber bodies continuously passes through at least one set of longitudinal separation and shaping cooling devices under the driving action of the main traction, and a row of continuous fibers and the hot-melt resin are continuously separated. The resin fusion unit is evenly separated along its width direction, and then cut by a cross-cutting device according to the set length to obtain a fiber-reinforced resin body with a regular cross-section.