Tow preimpregnation system

Abstract

The invention relates to the technical field of fiber processing, and discloses a tow preimpregnation system which comprises an automatic tow unwinding machine and a tow winding device, and tow winding drums used for winding tows are installed in the automatic tow unwinding machine and the tow winding device; a widening traction device and a preimpregnation mechanism; by arranging the pre-impregnation mechanism, resin is conveyed into a circulation cavity through a first resin conveying pipeline during pre-impregnation, then a first clamping plate moves downwards, a second clamping plate moves upwards, an insertion piece is inserted into a tow, and meanwhile an insertion piece is inserted into a communication cavity through an insertion hole in the bottom of the insertion piece; when the first clamping plate and the second clamping plate completely clamp the tow between the first clamping plate and the second clamping plate, the inserting piece can extend into the circulation cavity through the through hole to jack up the sealing plate, and due to the fact that the first resin conveying pipeline continuously conveys resin, the pressure in the circulation cavity is large, the resin can flow into the communication cavity through the through hole; and then the filaments are completely immersed into the internal structure of the filament bundle through the one-way valve in the discharge port, so that the preimpregnation effect is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber processing, and specifically to a tow pre-impregnation system. Background Art

[0002] In modern manufacturing, composite materials are widely used in many fields such as aerospace, automotive, construction, and sports equipment due to their excellent properties. These materials are usually composed of two or more materials with different properties, and have characteristics such as high strength, light weight, and corrosion resistance. To improve the performance of composite materials, tow pre-impregnation technology has become a key step in the manufacturing process.

[0003] Although tow pre-impregnation technology is crucial in the manufacturing of composite materials, the existing technology still has significant limitations in many aspects: The traditional manual operation method not only takes a long time but also is difficult to achieve continuous production, restricting the expansion of production scale. Due to the differences in manual operations, the resin impregnation of tows is often uneven during the pre-impregnation process, affecting the mechanical properties and reliability of the final products. The existing equipment lacks precise control over the resin delivery and impregnation processes, making it difficult to monitor and adjust the resin flow rate and pressure in real time, resulting in fluctuations in product quality. In the traditional pre-impregnation process, the unused resin often cannot be effectively recycled, causing waste of resources and increasing production costs. The pre-impregnated tows lack effective cooling measures in the subsequent processing, which may lead to degradation and instability of material properties.

[0004] A tow pre-impregnation device with the Chinese patent application publication number CN219190898U includes a yarn spreading device, a first impregnation device, a second impregnation device, and a traction device arranged in sequence; the first impregnation device includes a first glue coating roller, and the second impregnation device includes a second glue coating roller on the same horizontal plane as the first impregnation device; the traction device includes two traction rollers arranged in the same vertical plane; the fibers unfolded by the yarn spreading device sequentially pass through the upper surface of the first glue coating roller and the lower surface of the second glue coating roller, and pass through the two traction rollers in an S-shaped routing form. The pre-impregnation device of this application includes the first glue coating roller and the second glue coating roller on the same horizontal plane. After the fibers are unfolded by the yarn spreading device, they sequentially pass through the upper surface of the first glue coating roller and the lower surface of the second glue coating roller, ensuring that both the upper and lower surfaces of the fibers can be coated with resin. The fibers coated with resin pass through the two traction rollers in an S-shaped routing form, enabling the resin to infiltrate into the fibers.

[0005] However, based on the actual use process, it is necessary to pre-impregnate both sides of the tow in sequence, which will affect the production efficiency and the resin content is not easy to control. Summary of the Invention

[0006] The purpose of the present invention is to provide a tow pre-impregnation system to solve the problems raised in the above background art.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A tow pre-impregnation system, comprising:

[0009] An automatic wire unwinder and a tow winding device, both inside the automatic wire unwinder and the tow winding device are installed with tow winding drums for winding the tow;

[0010] A spreading and traction device, there are two spreading and traction devices, both of the two spreading and traction devices are located between the automatic wire unwinder and the tow winding device, the two spreading and traction devices are respectively installed on one side of the automatic wire unwinder and one side of the tow winding device, and the spreading and traction device is used to spread the tow;

[0011] A pre-impregnation mechanism, the pre-impregnation mechanism is installed between the two spreading and traction devices, and the pre-impregnation mechanism fully pre-impregnates the tow and controls the resin content;

[0012] The pre-impregnation mechanism includes a pre-impregnation box body, a first resin delivery pipeline, a corrugated pipe, a delivery groove, a first clamping plate and a second clamping plate. A delivery groove for delivering the tow is opened inside the pre-impregnation box body. One end of the first resin delivery pipeline is fixedly installed on the top of the pre-impregnation box body. One end of the corrugated pipe is communicated with the first resin delivery pipeline. The other end of the corrugated pipe is fixedly installed on the top of the first clamping plate. A circulation cavity is opened inside the first clamping plate. The other end of the corrugated pipe is communicated with the circulation cavity. An insertion part is fixedly installed at the bottom of the first clamping plate. A communication cavity is opened inside the insertion part. A plurality of discharge ports penetrating the insertion part are opened on the inner wall of the communication cavity. One-way valves are fixedly installed inside the plurality of discharge ports. A through hole is opened on the inner wall of the circulation cavity. The circulation cavity is communicated with the communication cavity through the through hole. A tension spring is fixedly installed on the inner wall of the circulation cavity. The tension spring is located on one side of the through hole;

[0013] A resin delivery mechanism, the resin delivery mechanism is installed at the bottom of the pre-impregnation mechanism.

[0014] Optionally, a sealing plate is fixedly installed at the top of the tension spring, a sealing member is fixedly installed at the bottom of the sealing plate, a plug is fixedly installed at the top of the second clamping plate, and a jack matching the plug is opened at the bottom of the communication cavity.

[0015] Optionally, a first electric push rod is fixedly installed on the top inner wall of the pre-impregnation box body, the first clamping plate is fixedly installed at the output end of the first electric push rod, a second electric push rod is fixedly installed on the bottom inner wall of the pre-impregnation box body, the second clamping plate is fixedly installed at the output end of the second electric push rod, and the first clamping plate corresponds to the second clamping plate.

[0016] Optionally, an installation cavity is provided inside the conveying trough. A second spring is fixedly installed on the inner wall of the installation cavity in the vertical direction, and a flattening member is fixedly installed at one end of the second spring.

[0017] Optionally, the pre-impregnation mechanism further includes a resin metering pump and a cooling box. One end of the first resin conveying pipeline is fixedly installed at the output end of the resin metering pump, and the cooling box is installed on one side of the pre-impregnation box.

[0018] Optionally, the resin conveying mechanism includes a screw extruder, a second resin conveying pipeline, and a second servo motor. One end of the second resin conveying pipeline is fixedly installed at the output end of the screw extruder, the other end of the second resin conveying pipeline is fixedly installed at the input end of the resin metering pump, the second servo motor is fixedly installed at the connection end of the screw extruder, and a feeding port is installed at the top of the screw extruder.

[0019] Optionally, a pressure pump is fixedly installed at the top of the first clamping plate. The output end of the pressure pump is communicated with the circulation cavity, and the pressure pump is movably connected inside the pre-impregnation box.

[0020] Optionally, the spreading and traction device includes a mounting frame, a mounting cover, a first servo motor, a traction roller, a conveying roller, a transmission wheel, a transmission belt, and a mounting member. Both the traction roller and the conveying roller are rotatably connected inside the mounting frame. The transmission wheel is rotatably connected to one side of the mounting frame. The mounting cover is fixedly installed on one side of the mounting frame. The first servo motor is fixedly installed on one side of the mounting cover. The traction roller is fixedly installed at the output end of the first servo motor. The traction roller, the conveying roller, and the transmission wheel are connected by the transmission belt. The mounting member is fixedly installed on one side of the mounting frame. An activity cavity is provided inside the mounting member. A first spring is fixedly installed inside the activity cavity. One end of the first spring is fixed to the inner side of the activity cavity, and the other end is provided with a pushing member, and the front end of the pushing member protrudes from the front end of the activity cavity and extends outwards. The head of the pushing member forms an extrusion on one side of the transmission belt.

[0021] Optionally, a fixed roller is fixedly installed inside the mounting frame. The fixed roller is arranged as a cavity body along the axial direction, and a reciprocating screw is rotatably connected inside the cavity of the fixed roller. The reciprocating screw is fixedly installed on one side of the transmission wheel. A reciprocating slider is movably connected to the inner side wall of the cavity of the reciprocating screw. A fixing member is fixedly installed at the top of the reciprocating slider, so that the fixing member protrudes upwards from the cavity body. An activity groove is provided on the side wall of the fixed roller. The fixing member is located inside the activity groove. A rubber member is fixedly installed at the top of the fixing member, and the rubber member protrudes upwards from the cavity body where the fixed roller is located.

[0022] A tow pre-impregnation process specifically includes the following steps:

[0023] S1: Control the operation of the screw extruder through the second servo motor to convey the resin inside the screw extruder. Convey the resin inside the screw extruder to the input end of the resin metering pump through the set second resin conveying pipeline, and then quantitatively convey the resin to the impregnation box through the first resin conveying pipeline by the resin metering pump;

[0024] S2: During impregnation, convey resin into the circulation cavity through the first resin conveying pipeline. Then, the first electric push rod drives the first clamping plate to move downward, and the second electric push rod drives the second clamping plate to move upward, so that the insert is inserted into the tow. At the same time, the plug is inserted into the communication cavity through the jack at the bottom of the insert. When the first clamping plate and the second clamping plate completely clamp the tow in the middle, the plug will extend into the circulation cavity through the through hole and lift the sealing plate. Since the first resin conveying pipeline continuously conveys resin, the pressure in the circulation cavity is relatively high, so that the resin flows into the communication cavity through the through hole, and then completely immerses into the internal structure of the tow through the one-way valve in the discharge port.

[0025] The present invention has at least the following beneficial effects:

[0026] (1) In this solution, by setting an impregnation mechanism, during impregnation, resin is conveyed into the circulation cavity through the first resin conveying pipeline. Then, the first clamping plate moves downward and the second clamping plate moves upward, so that the insert is inserted into the tow. At the same time, the plug is inserted into the communication cavity through the jack at the bottom of the insert. When the first clamping plate and the second clamping plate completely clamp the tow in the middle, the plug will extend into the circulation cavity through the through hole and lift the sealing plate. Since the first resin conveying pipeline continuously conveys resin, the pressure in the circulation cavity is relatively high, so that the resin can flow into the communication cavity through the through hole, and then completely immerses into the internal structure of the tow through the one-way valve in the discharge port, making the impregnation effect better;

[0027] (2) In this solution, by setting a widening and traction device, by installing the reciprocating screw on one side of the transmission wheel, when the transmission wheel rotates, it can drive the reciprocating screw to rotate. By the rotation of the reciprocating screw, the reciprocating slider can be driven to slide inside the fixed roller, so that the rubber part on the top of the fixing part can repeatedly stir the tow, thereby widening the tow;

[0028] (3) In this solution, by setting a screw extruder, the resin can be conveyed into the second resin conveying pipeline through the operation of the screw extruder, so that the resin can be conveyed to the resin metering pump through the second resin conveying pipeline. By setting the resin metering pump, the resin can be quantitatively conveyed to the impregnation box through the first resin conveying pipeline, so that the content of the resin can be controlled;

[0029] (4) In this solution, the second spring can be set to support the flattening part. By setting the flattening part, the tow passing through the conveying groove can be extruded, so that the holes in the tow can be flattened to avoid residues. Brief Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings

[0031] Figure 1 Schematic structural diagram of the prepreg box body of the present invention;

[0032] Figure 2 Schematic internal sectional view of the prepreg box body of the present invention;

[0033] Figure 3 For the present invention Figure 2 Enlarged structural diagram at A in the present invention;

[0034] Figure 4 Schematic sectional view of the insert and the sealing plate of the present invention;

[0035] Figure 5 Schematic structural diagram of the widening traction device of the present invention;

[0036] Figure 6 Schematic internal structure diagram of the mounting cover of the present invention;

[0037] Figure 7 Schematic sectional view of the mounting member of the present invention;

[0038] Figure 8 Schematic diagram of the fixed roller and the transmission wheel of the present invention;

[0039] Figure 9 Schematic sectional view of the fixed roller of the present invention;

[0040] Figure 10 Process flow chart of the present invention.

[0041] In the drawings, the list of components represented by each reference numeral is as follows:

[0042] 1. Automatic wire feeding machine; 101. Wire bundle winding drum; 2. Spreading and traction device; 21. Mounting frame; 201. Mounting cover; 202. First servo motor; 203. Traction roller; 204. Conveyor roller; 205. Transmission wheel; 2051. Fixed roller; 2053. Reciprocating screw; 2054. Reciprocating slider; 2055. Fixing part; 2056. Rubber part; 2057. Movable groove; 206. Transmission belt; 207. Mounting part; 2071. Movable cavity; 2072. First spring; 2073. Pushing part; 3. Pre-impregnation box; 301. First resin conveying pipeline; 3011. Bellows; 302. Conveying groove; 3021. Mounting cavity; 3022. Second spring; 3023. Flattening part; 303. First electric push rod; 304. First clamping plate; 3041. Flow cavity; 3042. Insertion part; 3043. Discharge port; 30431. Check valve; 3044. Connecting cavity; 3045. Jack; 3046. Through hole; 3047. Tension spring; 3048. Sealing plate; 3049. Sealing part; 305. Second clamping plate; 3051. Second electric push rod; 3052. Plug-in part; 306. Pressurizing pump; 4. Screw extruder; 401. Second resin conveying pipeline; 402. Feeding port; 403. Second servo motor; 5. Resin metering pump; 6. Cooling box; 7. Wire bundle winding device. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] Please refer to Figures 1-10 , the present invention provides a wire bundle pre-impregnation system, including:

[0045] An automatic wire feeding machine 1 and a wire bundle winding device 7, and wire bundle winding drums 101 for winding wire bundles are installed inside both the automatic wire feeding machine 1 and the wire bundle winding device 7;

[0046] A spreading and traction device 2. There are two spreading and traction devices 2, and both of the two spreading and traction devices 2 are located between the automatic wire feeding machine 1 and the wire bundle winding device 7. The two spreading and traction devices 2 are respectively installed on one side of the automatic wire feeding machine 1 and one side of the wire bundle winding device 7. The spreading and traction device 2 is used for spreading the wire bundle;

[0047] In some embodiments, refer to Figure 5 , Figure 6 , Figure 7 , Figure 8The widening traction device 2 includes a mounting frame 21, a mounting cover 201, a first servo motor 202, a traction roller 203, a conveying roller 204, a transmission wheel 205, a transmission belt 206 and a mounting member 207. The traction roller 203 and the conveying roller 204 are both rotatably connected inside the mounting frame 21, the transmission wheel 205 is rotatably connected to one side of the mounting frame 21, the mounting cover 201 is fixedly mounted on one side of the mounting frame 21, the first servo motor 202 is fixedly mounted on one side of the mounting cover 201, the traction roller 203 is fixedly mounted on the output end of the first servo motor 202, the traction roller 203, the conveying roller 204 and the transmission wheel 205 are connected through the transmission belt 206, the mounting member 207 is fixedly mounted on one side of the mounting frame 21, and an active cavity 2 is opened inside the mounting member 207. 071, a first spring 2072 is fixedly installed inside the movable cavity 2071, and a pushing member 2073 is fixedly installed at one end of the first spring 2072. The pushing member 2073 is located on one side of the transmission belt 206. By setting the traction roller 203, it can be used to pull the wire bundle, and by setting the conveying roller 204, it can be used to convey the wire bundle. By setting the first servo motor 202, it can be used to control the rotation of the traction roller 203. By setting the transmission belt 206, when the traction roller 203 rotates, the conveying roller 204 and the transmission wheel 205 can be driven to rotate at the same time. By setting the first spring 2072, it can be used to support the pushing member 2073. By setting the pushing member 2073, the transmission belt 206 can be pushed to one side to prevent the transmission belt 206 from deviating.

[0048] In some embodiments, see Figure 8 , Figure 9 A fixed roller 2051 is fixedly installed inside the mounting frame 21, and a reciprocating screw 2053 is rotatably connected inside the fixed roller 2051. The reciprocating screw 2053 is fixedly installed on one side of the transmission wheel 205. A reciprocating slider 2054 is movably connected to the side wall of the reciprocating screw 2053. A fixing piece 2055 is fixedly installed on the top of the reciprocating slider 2054. A movable groove 2057 is opened on the side wall of the fixed roller 2051. The fixing piece 2055 is located inside the movable groove 2057. A rubber piece 2056 is fixedly installed on the top of the fixing piece 2055. The rubber piece 2056 slightly protrudes from the fixed roller 2051. Two reciprocating sliders 2054 are arranged on the side wall of the fixed roller 2051. The two reciprocating sliders 2054 are respectively located at one end of the reciprocating screw 2053. A baffle is installed at the center of the reciprocating screw 2053. By installing the reciprocating screw 2053 on one side of the transmission wheel 205, the reciprocating screw 2053 can be driven to rotate when the transmission wheel 205 rotates. The rotation of the reciprocating screw 2053 can drive the reciprocating slider 2054 to slide inside the fixed roller 2051, so that the rubber part 2056 on the top of the fixed part 2055 can repeatedly move the wire bundle, thereby widening the wire bundle.

[0049] The impregnation mechanism is installed between two spreading and traction devices 2. The impregnation mechanism can quickly and completely impregnate the tow and control the resin content.

[0050] In some embodiments, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , the impregnation mechanism includes an impregnation box body 3, a first resin delivery pipeline 301, a corrugated pipe 3011, a delivery groove 302, a first clamping plate 304 and a second clamping plate 305. A delivery groove 302 for delivering the tow is provided inside the impregnation box body 3. One end of the first resin delivery pipeline 301 is fixedly installed on the top of the impregnation box body 3. One end of the corrugated pipe 3011 is communicated with the first resin delivery pipeline 301. The other end of the corrugated pipe 3011 is fixedly installed on the top of the first clamping plate 304. A circulation cavity 3041 is provided inside the first clamping plate 304. The other end of the corrugated pipe 3011 is communicated with the circulation cavity 3041. An insert 3042 is fixedly installed at the bottom of the first clamping plate 304. A communication cavity 3044 is provided inside the insert 3042. A plurality of discharge ports 3043 penetrating through the insert 3042 are provided on the inner wall of the communication cavity 3044. One-way valves 30431 are fixedly installed inside the plurality of discharge ports 3043. A through hole 3046 is provided on the inner wall of the circulation cavity 3041. The circulation cavity 3041 is communicated with the communication cavity 3044 through the through hole 3046. A tension spring 3047 is fixedly installed on the inner wall of the circulation cavity 3041. The tension spring 3047 is located on one side of the through hole 3046.

[0051] A sealing plate 3048 is fixedly installed at the top of the tension spring 3047. A sealing member 3049 is fixedly installed at the bottom of the sealing plate 3048. A plug 3052 is fixedly installed at the top of the second clamping plate 305. A jack 3045 matching the plug 3052 is provided at the bottom of the communication cavity 3044. By providing the corrugated pipe 3011, the first resin delivery pipeline 301 can still be communicated with the circulation cavity 3041 after the first clamping plate 304 moves. By providing the delivery groove 302, the tow can be delivered into the impregnation box body 3. During impregnation, resin is delivered into the circulation cavity 3041 through the first resin delivery pipeline 301. Then, the first clamping plate 304 moves downward and the second clamping plate 305 moves upward, so that the insert 3042 is inserted into the tow. At the same time, the plug 3052 is inserted into the communication cavity 3044 through the jack 3045 at the bottom of the insert 3042. When the first clamping plate 304 and the second clamping plate 305 completely clamp the tow in the middle, the plug 3052 will extend into the circulation cavity 3041 through the through hole 3046 and push up the sealing plate 3048. Since the first resin delivery pipeline 301 continuously delivers resin, the pressure in the circulation cavity 3041 is relatively high, so that the resin can flow into the communication cavity 3044 through the through hole 3046 and then completely immerse into the internal structure of the tow through the one-way valves 30431 in the discharge ports 3043, making the impregnation effect better.

[0052] In some embodiments, referring to Figure 2 , at the top inner wall of the impregnation box body 3, a first electric push rod 303 is fixedly installed, a first clamping plate 304 is fixedly installed at the output end of the first electric push rod 303, at the bottom inner wall of the impregnation box body 3, a second electric push rod 3051 is fixedly installed, a second clamping plate 305 is fixedly installed at the output end of the second electric push rod 3051. The first clamping plate 304 and the second clamping plate 305 correspond to each other. By setting the first electric push rod 303, it can be used to control the movement of the first clamping plate 304, and by setting the second electric push rod 3051, it can be used to control the movement of the second clamping plate 305.

[0053] In some embodiments, referring to Figure 2 , Figure 3 , an installation cavity 3021 is provided inside the conveying groove 302. A second spring 3022 is fixedly installed on the inner wall of the installation cavity 3021. One end of the second spring 3022 is fixedly installed with a flattening member 3023. By setting the second spring 3022, it can be used to support the flattening member 3023. By setting the flattening member 3023, the tow passing through the conveying groove 302 can be extruded, so that the holes in the tow can be flattened to avoid residues.

[0054] In some embodiments, referring to Figure 1 , the impregnation mechanism further includes a resin metering pump 5 and a cooling box body 6. One end of the first resin conveying pipeline 301 is fixedly installed at the output end of the resin metering pump 5. The cooling box body 6 is installed on one side of the impregnation box body 3. By setting the resin metering pump 5, the resin can be quantitatively conveyed into the impregnation box body 3 through the first resin conveying pipeline 301, so that the content of the resin can be controlled. By using the cooling box body 6, the impregnated tow can be cooled. The cooling box body 6 can be a box body equipped with a cooling fan, and the tow is cooled by accelerating the air circulation.

[0055] In some embodiments, referring to Figure 10 , the resin conveying mechanism includes a screw extruder 4, a second resin conveying pipeline 401 and a second servo motor 403. One end of the second resin conveying pipeline 401 is fixedly installed at the output end of the screw extruder 4. The other end of the second resin conveying pipeline 401 is fixedly installed at the input end of the resin metering pump 5. The second servo motor 403 is fixedly installed at the connection end of the screw extruder 4. A feeding port 402 is installed on the top of the screw extruder 4. By setting the second servo motor 403, it can be used to control the operation of the screw extruder 4. Through the feeding port 402, resin can be added into the screw extruder 4. By the operation of the screw extruder 4, the resin can be conveyed into the second resin conveying pipeline 401, so that the resin can be conveyed into the resin metering pump 5 through the second resin conveying pipeline 401 for quantitative addition.

[0056] In some embodiments, refer to Figure 1 and Figure 2 . A pressure pump 306 is fixedly installed at the top of the first clamping plate 304. The output end of the pressure pump 306 is communicated with the circulation cavity 3041. The pressure pump 306 is movably connected inside the impregnation box body 3. By setting the pressure pump 306, pressure can be applied to the circulation cavity 3041 inside the first clamping plate 304, so that the inside of the circulation cavity 3041 is in a high-pressure environment. Thus, when the circulation cavity 3041 is communicated with the communication cavity 3044, the resin can flow into the circulation cavity 3044 more stably, and then can flow out of the discharge port 3043 better and immerse into the tow.

[0057] The working process and principle of the present invention: When in use, the tow is conveyed by the automatic wire placing machine 1 and the tow winding device 7. When the tow passes through the spreading and traction device 2, the traction roller 203 can be used to traction the tow, the conveying roller 204 can be used to convey the tow, and the rotation of the reciprocating screw 2053 can drive the reciprocating slider 2054 to slide inside the fixed roller 2051, so that the rubber part 2056 on the top of the fixing part 2055 can repeatedly push the tow, thereby spreading the tow. The spread tow then enters the impregnation box body 3 through the conveying groove 302. Resin is added into the screw extruder 4 through the feeding port 402. During this process, the second servo motor 403 is used to control the operation of the screw extruder 4, extrude and convey the resin inside the screw extruder 4, and convey the resin to the second resin conveying pipeline 401.

[0058] By setting up the second resin delivery pipeline 401, the resin inside the screw extruder 4 can be delivered to the input end of the resin metering pump 5. Then, the resin metering pump 5 can quantitatively deliver the resin to the impregnation box 3 through the first resin delivery pipeline 301. During impregnation, the resin is delivered to the inside of the circulation cavity 3041 through the first resin delivery pipeline 301. After that, the first electric push rod 303 drives the first clamping plate 304 to move downward, and the second electric push rod 3051 drives the second clamping plate 305 to move upward, so that the insert 3042 is inserted into the tow. At the same time, the plug 3052 is inserted into the communication cavity 3044 through the jack 3045 at the bottom of the insert 3042. When the first clamping plate 304 and the second clamping plate 305 completely clamp the tow in the middle, the plug 3052 will extend into the circulation cavity 3041 through the through hole 3046 and push up the sealing plate 3048. Since the first resin delivery pipeline 301 continuously delivers resin, the pressure in the circulation cavity 3041 is relatively high, so that the resin can flow into the communication cavity 3044 through the through hole 3046 and completely immerse into the internal structure of the tow through the one-way valve 30431 in the discharge port 3043. After impregnation is completed, it enters the cooling box through the conveying groove 302 on the other side for cooling. When passing through the conveying groove 302, the flattening member 3023 can extrude the tow passing through the conveying groove 302, so that the holes in the tow can be flattened. Finally, after being widened by the widening and traction device 2, it is wound by the tow winding device 7.

[0059] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tow pre-impregnation system, characterized in that, Including: An automatic wire unwinding machine (1) and a tow winding device (7), and a tow winding drum (101) for winding a tow is installed inside both the automatic wire unwinding machine (1) and the tow winding device (7); A spreading and traction device (2), there are two spreading and traction devices (2), both of the two spreading and traction devices (2) are located between the automatic wire unwinding machine (1) and the tow winding device (7), the two spreading and traction devices (2) are respectively installed on one side of the automatic wire unwinding machine (1) and one side of the tow winding device (7), and the spreading and traction device (2) is used for spreading the tow; A pre-impregnation mechanism, the pre-impregnation mechanism is installed between the two spreading and traction devices (2), the pre-impregnation mechanism fully pre-impregnates the tow and controls the resin content; The pre-impregnation mechanism includes a pre-impregnation box body (3), a first resin delivery pipeline (301), a corrugated pipe (3011), a delivery groove (302), a first clamping plate (304) and a second clamping plate (305). A delivery groove (302) for delivering the tow is opened inside the pre-impregnation box body (3). One end of the first resin delivery pipeline (301) is fixedly installed on the top of the pre-impregnation box body (3). One end of the corrugated pipe (3011) is communicated with the first resin delivery pipeline (301). The other end of the corrugated pipe (3011) is fixedly installed on the top of the first clamping plate (304). A circulation cavity (3041) is opened inside the first clamping plate (304). The other end of the corrugated pipe (3011) is communicated with the circulation cavity (3041). An insertion part (3042) is fixedly installed at the bottom of the first clamping plate (304). A communication cavity (3044) is opened inside the insertion part (3042). A plurality of discharge ports (3043) penetrating through the insertion part (3042) are opened on the inner wall of the communication cavity (3044). A one-way valve (30431) is fixedly installed inside each of the plurality of discharge ports (3043). A through hole (3046) is opened on the inner wall of the circulation cavity (3041). The circulation cavity (3041) is communicated with the communication cavity (3044) through the through hole (3046). A tension spring (3047) is fixedly installed on the inner wall of the circulation cavity (3041), and the tension spring (3047) is located on one side of the through hole (3046); A resin delivery mechanism, the resin delivery mechanism is installed at the bottom of the pre-impregnation mechanism.

2. The tow pre-impregnation system according to claim 1, wherein: The top of the tension spring (3047) is fixedly installed with a sealing plate (3048), the bottom of the sealing plate (3048) is fixedly installed with a sealing member (3049), the top of the second clamping plate (305) is fixedly installed with a plug-in part (3052), and a jack (3045) matching with the plug-in part (3052) is opened at the bottom of the communication cavity (3044).

3. The tow pre-impregnation system according to claim 2, characterized in that: A first electric push rod (303) is fixedly installed at the top of the inner wall of the impregnation box body (3), a first clamping plate (304) is fixedly installed at the output end of the first electric push rod (303), a second electric push rod (3051) is fixedly installed at the bottom of the inner wall of the impregnation box body (3), a second clamping plate (305) is fixedly installed at the output end of the second electric push rod (3051), and the first clamping plate (304) corresponds to the second clamping plate (305).

4. A tow pre-impregnation system according to claim 2, characterized in that: An installation cavity (3021) is provided inside the conveying groove (302), a second spring (3022) is fixedly installed on the inner wall of the installation cavity (3021) in the vertical direction, and a flattening member (3023) is fixedly installed at one end of the second spring (3022).

5. A tow pre-impregnation system according to claim 2, characterized in that: The impregnation mechanism further includes a resin metering pump (5) and a cooling box body (6). One end of the first resin conveying pipeline (301) is fixedly installed at the output end of the resin metering pump (5), and the cooling box body (6) is installed on one side of the impregnation box body (3).

6. The tow pre-impregnation system according to claim 5, characterized in that: The resin conveying mechanism includes a screw extruder (4), a second resin conveying pipeline (401), and a second servo motor (403). One end of the second resin conveying pipeline (401) is fixedly installed at the output end of the screw extruder (4), the other end of the second resin conveying pipeline (401) is fixedly installed at the input end of the resin metering pump (5), the second servo motor (403) is fixedly installed at the connection end of the screw extruder (4), and a feeding port (402) is installed at the top of the screw extruder (4).

7. The tow pre-impregnation system according to claim 1, characterized in that: A pressure pump (306) is fixedly installed at the top of the first clamping plate (304), the output end of the pressure pump (306) is communicated with the flow cavity (3041), and the pressure pump (306) is movably connected inside the impregnation box body (3).

8. A tow pre-impregnation system according to claim 1, characterized in that: The widening traction device (2) comprises a mounting frame (21), a mounting cover (201), a first servo motor (202), a traction roller (203), a conveying roller (204), a transmission wheel (205), a transmission belt (206) and a mounting member (207); the traction roller (203) and the conveying roller (204) are both rotatably connected inside the mounting frame (21); the transmission wheel (205) is rotatably connected to one side of the mounting frame (21); the mounting cover (201) is fixedly mounted on one side of the mounting frame (21); the first servo motor (202) is fixedly mounted on one side of the mounting cover (201); the traction roller (203) is fixedly mounted on the output end of the first servo motor (202); The traction roller (203), the conveying roller (204) and the transmission wheel (205) are connected by transmission through the transmission belt (206); the mounting member (207) is fixedly mounted on one side of the mounting frame (21); an active cavity (2071) is provided inside the mounting member (207); a first spring (2072) is fixedly mounted inside the active cavity (2071); one end of the first spring (2072) is fixed on the inner side of the active cavity (2071); a pushing member (2073) is mounted on the other end of the first spring (2072); and a front end of the pushing member (2073) protrudes from the front end of the active cavity (2071) and extends outwards; the head of the pushing member (2073) forms an extrusion on one side of the transmission belt (206).

9. The tow pre-impregnation system according to claim 8, characterized in that: A fixed roller (2051) is fixedly installed inside the mounting frame (21); the fixed roller (2051) is arranged as a hollow body along the axial direction, and is rotatably connected to a reciprocating screw (2053) in the hollow body; the reciprocating screw (2053) is fixedly installed on one side of the transmission wheel (205); a reciprocating slider (2054) is movably connected to the inner side wall of the hollow body of the reciprocating screw (2053); a fixing piece (2055) is fixedly installed on the top of the reciprocating slider (2054) so ​​that the fixing piece (2055) protrudes upward from the hollow body; a movable groove (2057) is provided on the side wall of the fixed roller (2051); the fixing piece (2055) is located inside the movable groove (2057); a rubber piece (2056) is fixedly installed on the top of the fixing piece (2055); the rubber piece (2056) protrudes upward from the hollow body where the fixed roller (2051) is located.

10. A tow pre-impregnation process according to any one of claims 1-9, characterized in that: The specific steps include: S1: The operation of the screw extruder (4) is controlled by the second servo motor (403) to transport the resin inside the screw extruder (4), and the resin inside the screw extruder (4) is transported to the input end of the resin metering pump (5) by setting a second resin transport pipeline (401), and then the resin metering pump (5) transports the resin quantitatively through the first resin transport pipeline (301) to the prepreg box (3); S2: During pre-impregnation, resin is conveyed into the interior of the circulation cavity (3041) through the first resin conveying pipeline (301). Then, the first electric push rod (303) drives the first clamping plate (304) to move downward, and the second electric push rod (3051) drives the second clamping plate (305) to move upward, so that the insert (3042) is inserted into the tow. At the same time, the plug-in part (3052) is inserted into the communication cavity (3044) through the jack (3045) at the bottom of the insert (3042). When the first clamping plate (304) and the second clamping plate (305) completely clamp the tow in the middle, the plug-in part (3052) will extend into the circulation cavity (3041) through the through hole (3046) and push up the sealing plate (3048). Since the first resin conveying pipeline (301) continuously conveys resin, the pressure in the circulation cavity (3041) is relatively high, so that the resin flows into the communication cavity (3044) through the through hole (3046), and then completely immerses into the internal structure of the tow through the one-way valve (30431) in the discharge port (3043).

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