Multi-roll prepreg feeding device and method for prepreg cutting equipment

Abstract

The invention provides a multi-roll prepreg feeding device and method for prepreg cutting equipment, the multi-roll prepreg feeding device comprises an unwinding module, a release paper winding module, a tension control module and an auxiliary clamping module, the unwinding module is provided with a plurality of material rolls through a slip shaft, the release paper winding module achieves simultaneous winding of release paper on the material rolls through a release paper winding motor, and the tension control module is used for controlling the tension of the release paper on the material rolls. The tension control module comprises a tension control shaft and two rotating rollers and is used for pulling the prepreg and adjusting the tension by controlling the distance between the control shaft and the rotating rollers, the auxiliary clamping module comprises a fixing shaft and a clamping shaft, the fixing shaft is provided with a plurality of clamping rings, one-way bearings are arranged in the clamping rings and are used for clamping and tightening the prepreg, and the clamping shafts are used for clamping the prepreg. And prepreg traction power is provided by a motor. Five cutting raw materials can be stably conveyed to the cutting machine at the same time, multiple prepreg belts of the cutting machine can be rolled up by one person, and the prepreg cutting efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mechanical equipment, and relates to a multi-roll prepreg feeding device and method for a prepreg cutting device. BACKGROUND

[0002] Long-cut fiber reinforced composite material (hereinafter referred to as long-cut fiber) forming technology has the advantages of uniform sheet dispersion, low cost and suitability for complex component forming. The existing long-cut fiber prepreg preparation method can process continuous fiber prepreg narrow rolls through processes such as feeding and long-cutting. During the processing, efficient and convenient feeding of the continuous fiber prepreg roll needs to be ensured, and the release paper of the prepreg needs to be separated. The traditional unwinding method usually places a single roll on a single unwinding shaft, and the tension control ensures the stability of the feeding process. However, in the process of processing narrow prepreg, multiple narrow rolls are usually cut simultaneously to improve processing efficiency. If a single unwinding shaft is used to arrange a single roll, it will occupy a large space and is inconvenient to operate, reducing the feeding efficiency. At the same time, during the feeding process of multiple rolls, the release paper needs to be separated at the same time, but the feeding roll will affect the stability of the fed roll, causing the fed roll to curl and increasing the feeding difficulty. Therefore, how to efficiently and conveniently feed is the key to improving the processing efficiency of fiber prepreg.

[0003] The utility model patent with publication number CN218753946U discloses a multi-roll feeding device, which arranges multiple unwinding shafts on a rotating support. The invention patent with publication number CN116588733A discloses a structure and process for uninterrupted material replacement, which uses two symmetrical unwinding mechanisms for unwinding. The above-mentioned device is suitable for single-roll wide-width rolls, but does not consider the separation of prepreg and release paper, and the prepreg cutting device needs to cut multiple narrow rolls at the same time. Single-roll feeding cannot meet the processing efficiency requirements. Therefore, in order to meet the high-efficiency processing requirements of prepreg, a feeding device is designed to reduce the feeding time and realize efficient and convenient feeding of prepreg, which is the key to further improving the cutting efficiency of prepreg. SUMMARY

[0004] To solve the above problems, the application provides a multi-roll prepreg feeding device and method for a prepreg cutting device.

[0005] The technical scheme adopted by the application is as follows:

[0006] A multi-roll prepreg feeding device for a prepreg cutting device, comprising an unwinding module 1, a release paper winding module 2, a tension control module 3 and an auxiliary clamping module 4, which are installed on a back plate in sequence along the transverse direction.

[0007] The unwinding module 1 comprises a slip shaft fixing part 101 and a slip shaft 103; the slip shaft 103 is fixed on the back plate through the slip shaft fixing part 101, so that the slip shaft 103 is arranged horizontally, the slip shaft 103 is inflatable, a plurality of slip rings are arranged on the slip shaft 103 at intervals and can rotate freely, and the slip rings are used for one-to-one corresponding installation of the roll 102; the traction torque is adjusted by adjusting the air pressure in the slip shaft, so that the pre-impregnated tape feeding process has a certain tension, and the air pressure is controlled by the tension sensor, the controller and the electric proportional valve arranged in the pre-impregnated tape cutting equipment control system.

[0008] The release paper winding module 2 comprises a release paper winding motor 201, a gasket 202, a release paper winding shaft fixing part 206, a first release paper baffle 204, a second release paper baffle 205 and a release paper winding shaft 203.

[0009] The release paper winding shaft 203 is fixed on the back plate through the release paper winding shaft fixing part 203; a plurality of release paper winding motors 201 are arranged on the release paper winding shaft 203 at intervals, the number of the release paper winding motors 201 is the same as that of the slip rings on the slip shaft 103, the release paper winding motor 201 is a torque motor, is used for winding and rolling the release paper, the release paper winding motor 201 and the release paper winding shaft 203 are fixed through the gasket 202 to fix the position of the release paper winding motor 201; the first release paper baffle 204 and the second release paper baffle 205 are respectively arranged on the two side end faces of each release paper winding motor 201 along the circumference, so as to avoid deviation during the release paper winding process, the first release paper baffle 204 and the second release paper baffle 205 are provided with slits through which the wallpaper cutter can pass, so as to facilitate taking down the wound release paper, and the deviation correction work of the release paper winding is realized.

[0010] The tension control module 3 comprises a tension control air cylinder 301, a fastening bolt 302, an air cylinder connecting plate 303, a tension control sliding rail 304, an air cylinder connecting part 305, a fixing pin 306, a guide rail sliding block 307, two rotating rollers 308 and a tension control shaft 309.

[0011] The tension control cylinder 301 is fixed on the back plate through the fastening bolt 302, and the tension control slide rails 304 are arranged in parallel on both sides below the tension control cylinder 301 and are fixed on the back plate; the cylinder connecting plate 303 is in sliding fit with the two tension control slide rails 304, the cylinder connecting piece 305 is fixed on the cylinder connecting plate 303 through the fixing pin 306, is used for realizing communication with the tension control cylinder 301, and the cylinder connecting plate 303 is controlled to move up and down by the tension control cylinder 301; the tension control shaft 309 is fixedly installed on the cylinder connecting plate 303, moves up and down synchronously with the cylinder connecting plate 303 and can passively rotate around the shaft, the tension control shaft 309 carries the tension sensor, and the height of the tension control shaft 309 is controlled through the prepreg cutting equipment control system; the two rotating rollers 308 are symmetrically arranged below the tension control shaft 309 and are fixedly installed on the back plate, the tension control shaft 309 is located directly above the symmetric axes of the two rotating rollers 308, the height of the two rotating rollers 308 is lower than that of the slip shaft 103, and the two rotating rollers 308 can passively rotate around the shaft; the two rotating rollers 308 and the tension control shaft 309 cooperate to pull the prepreg, the height of the tension control shaft 309, that is, the distance between the tension control shaft 309 and the rotating roller 308 is adjusted through the tension control cylinder 301, and the pulling force on the prepreg is adjusted.

[0012] The auxiliary clamping module 4 comprises a clamping cylinder 401, clamping slide rails 402, a clamping connecting plate 403, a bearing sleeve 404, a clamping connecting piece 405, a one-way bearing 406, a fixed shaft 407 and a clamping shaft 408.

[0013] The clamping cylinder 401 is fixed on the bottom plate, the clamping slide rails 402 are arranged in parallel below the clamping cylinder 401 and symmetrically to the clamping cylinder 401, the clamping connecting plate 403 is in sliding fit with the two clamping slide rails 402, the clamping connecting piece 405 is fixed on the clamping connecting plate 403 and is communicated with the clamping cylinder 401, the position of the clamping connecting plate 403 is adjusted by the clamping cylinder 401, the clamping shaft 408 is fixed on the lower part of the clamping connecting plate 403 and moves synchronously with the clamping connecting plate 403, a plurality of clamping rings are installed side by side on the clamping shaft 408, the clamping ring is composed of the one-way bearing 406 and the bearing sleeve 404 installed on the outside through a key, and the clamping ring is connected with the clamping shaft 408 through a key; the fixed shaft 407 is fixedly installed on the back plate below the clamping shaft 408, the same number of clamping rings are also installed on the fixed shaft 407 through a key, and the clamping rings on the fixed shaft 407 correspond to the clamping rings on the clamping shaft 408 one by one and can rotate in opposite directions, the fixed shaft 407 is matched with a motor to provide rotating power for the fixed shaft 407, drive the clamping rings on the fixed shaft 407 to rotate synchronously, and drive the clamping rings on the clamping shaft 408 to rotate passively; in use, the position of the clamping shaft 408 is adjusted by the clamping cylinder 401 to make the clamping rings press the clamping rings on the fixed shaft 407, and the pre-preg is pulled to the corresponding clamping ring by relying on the one-way movement characteristics of the one-way bearing 406, the pre-preg is further advanced by rotating the clamping ring, and the pre-preg is limited by the one-way bearing 406 and cannot retreat, so that the pre-preg is kept in a tight state and does not twist.

[0014] A kind of pre-preg cutting equipment is used to load device and method with multiple rolls of pre-preg, based on the above-mentioned multiple rolls of pre-preg loading device, comprising the following steps:

[0015] S1.Each slip ring on the slip shaft 103 is installed with roll 102, the inside of slip shaft 103 is inflated, and the inflation pressure is 0.2MPa-0.4Mpa.

[0016] S2.The end of release paper on the surface of roll 102 is separated and fixed on each release paper winding motor 201 one by one, and the release paper winding motor 201 is started to wind the release paper.

[0017] S3.The head of the pre-preg of the first roll roll 102 is sequentially pulled under the first rotating roller 308, above the tension control shaft 309 and under the second rotating roller 308, and then pulled between the fixed shaft 407 and the clamping shaft 408, the tension is sensed by the tension sensor, and the height of the tension control shaft 309 is adjusted by the pre-preg cutting equipment control system.

[0018] S4.The clamping shaft 408 is controlled by the clamping cylinder 401 to move downward to the two clamping rings corresponding to the clamping shaft 408 and the fixed shaft 407, and the pre-preg is clamped, and the pre-preg is tightened by rotating the clamping ring.

[0019] S5. Meanwhile, the pre-preg material head of the second material roll 102 is pulled through the tension control module 3, and then pulled between two clamping rings at the corresponding position, and the clamping ring is actuated to tighten the pre-preg material.

[0020] S6. Repeat S5 to complete the feeding process of all pre-preg materials of the material roll 102.

[0021] S7. The motor on the fixed shaft 407 is turned on, the fixed shaft 407 drives the clamping ring on it to rotate, and the clamping ring on the clamping shaft 408 is synchronously passively rotated, so as to simultaneously pull out multiple pre-preg materials.

[0022] The beneficial effects of the present application are:

[0023] The present application adopts a slip shaft to unwind, multiple material rolls are arranged on one slip shaft, multiple pre-preg material narrow strips can be wound one by one, the unwinding efficiency is improved, the tension of the material strip during unwinding is controlled by adjusting the air pressure of the slip shaft, the unwinding tension is controlled by a tension sensor, it is ensured that multiple material rolls are in a tensioned and wrinkle-free state during unwinding, the pre-preg material after feeding is fixed by a clamping module, five cutting raw materials are simultaneously and stably conveyed to a cutting machine, and one person can complete the winding work of multiple pre-preg material strips of the cutting machine, and the cutting efficiency of the pre-preg material is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic diagram of a multi-roll pre-preg material feeding device;

[0025] Figure 2 is a schematic diagram of an embodiment of the unwinding module and the release paper winding module;

[0026] Figure 3 is a schematic diagram of an embodiment of the tension control module;

[0027] Figure 4 is a schematic diagram of an embodiment of the clamping module;

[0028] Figure 5 is a flow chart of a multi-roll pre-preg material feeding method;

[0029] In the figure: 1 unwinding module; 2 release paper winding module; 3 tension control module; 4 clamping module; 101 slip shaft fixing piece; 102 material roll; 103 slip shaft; 204 second release paper baffle first release paper baffle; 205 has second release paper baffle; 206 release paper winding shaft; 203 release paper winding shaft fixing piece; 202 gasket; 201 release paper winding motor; 301 tension control cylinder; 302 fastening bolt; 303 cylinder connecting plate; 304 tension control sliding rail; 305 cylinder connecting piece; 306 fixed pin; 307 guide rail sliding block; 308 two rotating rollers; 309 tension control shaft; 401 clamping cylinder; 402 clamping sliding rail; 403 clamping connecting plate; 404 bearing sleeve; 405 clamping connecting piece; 406 single bearing; 407 fixed shaft; 408 clamping shaft. DETAILED DESCRIPTION

[0030] The specific embodiments of the present application are further illustrated in combination with the drawings and technical solutions.

[0031] EMBODIMENT

[0032] A kind of pre-impregnated material cutting equipment is used to the feeding device of multiple roll pre-impregnated material, including unwinding module 1, release paper winding module 2, tension control module 3 and auxiliary clamping module 4, four modules are sequentially installed on back plate along transverse direction, as shown in Figure 1 .

[0033] The described unwinding module 1 includes slip shaft fixing piece 101 and slip shaft 103;The slip shaft 103 is fixed on the back plate by the slip shaft fixing piece 101, so that the slip shaft 103 is horizontally arranged, the slip shaft 103 can be inflated inside, the slip shaft 103 is provided with 5 slip difference rings and can freely rotate, for one-to-one corresponding installation material roll 102, by adjusting the size of air pressure inside the slip shaft to adjust the traction torque, so that pre-impregnated tape feeding process has certain tension, its air pressure size is controlled by the tension sensor, controller, electric proportional valve control arranged in the pre-impregnated material cutting equipment control system, as shown in Figure 2 .

[0034] The described release paper winding module 2 includes release paper winding motor 201, gasket 202, release paper winding shaft fixing piece 206, first release paper baffle 204, second release paper baffle 205, release paper winding shaft 203, as shown in Figure 2 .

[0035] The two said release paper winding shafts 203 are fixed on the back plate through release paper winding shaft fixing members 203, one of which is located below the differential shaft 103 and is equipped with three release paper winding motors 201 at intervals, and the other is located on the side of the differential shaft 103 and is equipped with two release paper winding motors 201 at intervals, the release paper winding motors 201 are torque motors for winding and rolling the release paper, the position of the release paper winding motor 201 is fixed through the setting of the gasket 202 between the release paper winding motor 201 and the release paper winding shaft 203; the first release paper baffle 204 and the second release paper baffle 205 are respectively installed on the two side end faces of each release paper winding motor 201 along the circumference to avoid deviation during the winding of the release paper, and a gap for the wallpaper cutter to pass through is left on the first release paper baffle 204 and the second release paper baffle 205 to facilitate the removal of the wound release paper, and the deviation correction work of the release paper winding is realized.

[0036] The said tension control module 3 includes a tension control cylinder 301, a fastening bolt 302, a cylinder connecting plate 303, a tension control slide rail 304, a cylinder connecting piece 305, a fixed pin 306, a guide rail sliding block 307, two rotating rollers 308, a tension control shaft 309, as shown in Figure 3 .

[0037] The said tension control cylinder 301 is fixed on the back of the back plate through the fastening bolt 302, and the back plate below the tension control cylinder 301 is provided with a vertical long circular hole; the said tension control slide rail 304 is provided with two, which are arranged in parallel on both sides of the long circular hole and are fixed on the back of the back plate; the two sides of the front face of the said cylinder connecting plate 303 are respectively in sliding fit with the two tension control slide rails 304, the cylinder connecting piece 305 is fixed on the cylinder connecting plate 303 through the fixed pin 306, which is used to realize communication with the tension control cylinder 301, and the cylinder connecting plate 303 moves up and down controlled by the tension control cylinder 301; the said tension control shaft 309 is fixedly installed on the center of the front face of the cylinder connecting plate 303 and penetrates out of the long circular hole of the back plate, which moves up and down synchronously with the cylinder connecting plate 303 and can passively rotate around the shaft, the tension control shaft 309 is loaded with a tension sensor, and the height of the tension control shaft 309 is controlled through the prepreg cutting equipment control system; the said two rotating rollers 308 are fixedly installed on both sides of the bottom of the long circular hole of the back plate, so that the tension control shaft 309 is located directly above the symmetric axis of the two rotating rollers 308, and the height of the two rotating rollers 308 is lower than that of the differential shaft 103, and the two rotating rollers 308 can passively rotate around the shaft; the two rotating rollers 308 and the tension control shaft 309 cooperate to pull the prepreg, and the height of the tension control shaft 309, that is, the distance between the tension control shaft 309 and the rotating roller 308, is adjusted through the tension control cylinder 301 to adjust the pulling force on the prepreg.

[0038] The auxiliary clamping module 4 comprises a clamping cylinder 401, a clamping slide rail 402, a clamping connecting plate 403, a bearing sleeve 404, a clamping connecting piece 405, a one-way bearing 406, a fixed shaft 407, and a clamping shaft 408. Figure 4 .

[0039] The clamping cylinder 401 is fixed on the bottom plate, and the clamping slide rails 402 are arranged in parallel below the clamping cylinder 401 and symmetrically to the clamping cylinder 401. The back of the clamping connecting plate 403 is slidably connected with the two clamping slide rails 402. The clamping connecting piece 405 is fixed on the clamping connecting plate 403 and is connected with the clamping cylinder 401, so that the position of the clamping connecting plate 403 is adjusted by the clamping cylinder 401. The clamping shaft 408 is fixed on the lower part of the clamping connecting plate 403 and is arranged horizontally and moves synchronously with the clamping connecting plate 403. The clamping shaft 408 is provided with five clamping rings arranged side by side. The clamping ring is composed of the one-way bearing 406 and the bearing sleeve 404 installed on the outer part of the one-way bearing 406 by a key. The clamping ring is connected with the clamping shaft 408 by the key. The fixed shaft 407 is fixedly installed on the back plate below the clamping shaft 408 and is arranged horizontally. The height of the fixed shaft 407 is the same as that of the gas cylinder of the rotating roller 308. The same number of clamping rings are installed on the fixed shaft 407 by a key and correspond to the clamping rings on the clamping shaft 408 and can rotate in the opposite direction. The fixed shaft 407 is provided with a motor to provide rotating power for the fixed shaft 407, drive the clamping rings on the fixed shaft 407 to rotate synchronously, and drive the clamping rings on the clamping shaft 408 to rotate passively. During use, the position of the clamping shaft 408 is adjusted by the clamping cylinder 401, so that the clamping rings are pressed against the clamping rings on the fixed shaft 407. The pre-impregnated material is pulled to the corresponding clamping ring by the one-way movement of the one-way bearing 406. The pre-impregnated material is further advanced by rotating the clamping ring and is prevented from returning by the one-way bearing 406, so that the pre-impregnated material is kept in a tight state and does not twist.

[0040] A kind of pre-impregnated material cutting equipment is provided with a multi-roll pre-impregnated material feeding device and method, based on the above multi-roll pre-impregnated material feeding device, as shown in Figure 5 , comprising the following steps:

[0041] S1. Install the material roll 102 on each slip ring on the slip shaft 103. The inside of the slip shaft 103 is inflated, and the inflation pressure is 0.2 MPa-0.4 MPa.

[0042] S2. Separate the release paper end of the material roll 102 one by one and fix it on each release paper winding motor 201. Start the release paper winding motor 201 to start winding the release paper.

[0043] S3. The pre-preg material head of the first roll 102 is pulled through the lower side of the first rotating roller 308, the upper side of the tension control shaft 309 and the lower side of the second rotating roller 308 in sequence, and then pulled between the fixed shaft 407 and the clamping shaft 408. The tension is sensed by the tension sensor, and the height of the tension control shaft 309 is adjusted by the pre-preg cutting device control system.

[0044] S4. The clamping shaft 408 is controlled by the clamping cylinder 401 to move downward to the position corresponding to the fixed shaft 407, and the two clamping rings clamp the pre-preg material. The pre-preg material is tightened by rotating the clamping ring.

[0045] S5. At the same time, the pre-preg material head of the second roll 102 is pulled from the lower side of the two rotating rollers 308, and then pulled between the two clamping rings at the corresponding position. The pre-preg material is tightened by rotating the clamping ring. In other embodiments, the pulling method of the pre-preg material of all rolls 102 on the tension control module is the same as that of the first roll 102, that is, the material head is pulled through the lower side of the first rotating roller 308, the upper side of the tension control shaft 309 and the lower side of the second rotating roller 308 in sequence, and then pulled between the fixed shaft 407 and the clamping shaft 408.

[0046] S6. Repeat S5 to complete the feeding process of the pre-preg material of all rolls 102.

[0047] S7. The motor on the fixed shaft 407 is turned on, the fixed shaft 407 drives the clamping ring on it to rotate, and the clamping ring on the clamping shaft 408 is synchronously passively rotated, so that five pre-preg materials are simultaneously pulled out. The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification or equivalent change of the above embodiment according to the technical essence of the present application falls within the protection scope of the present application.

Claims

1. A multi-roll prepreg feeding device for a prepreg cutting apparatus, characterized by, The application relates to a pre-impregnated fiber material unwinding and tensioning device. The pre-impregnated fiber material unwinding and tensioning device comprises the following modules: An unwinding module (1) is used for mounting a plurality of material rolls (102) through a slip shaft (103); A release paper winding module (2) is used for simultaneously winding the release paper of the material rolls (102); A tension control module (3) is used for adjusting the tension of the pre-impregnated fiber material by controlling the distance between a tension control shaft (309) and two rotating rollers (308); 2. The multi-roll prepreg loading device for prepreg cutting equipment according to claim 1, wherein, An auxiliary clamping module (4) is used for clamping and tightening the pre-impregnated fiber material through a fixed shaft (407) and a clamping shaft (408). Specifically, The unwinding module (1), the release paper winding module (2), the tension control module (3) and the auxiliary clamping module (4) are sequentially arranged on a back plate in the transverse direction; The slip shaft (103) is fixed on the back plate, a plurality of slip rings are arranged on the slip shaft (103) in a spaced mode and the slip shaft (103) can freely rotate, and the slip shaft (103) is used for mounting the plurality of material rolls (102); The release paper winding module (2) comprises a release paper winding motor (201) and a release paper winding shaft (203); The release paper winding shaft (203) is fixed on the back plate, a plurality of release paper winding motors (201) are mounted on the release paper winding shaft (203) in a spaced mode, the number of the release paper winding motors (201) is same as that of the slip rings on the slip shaft (103), the release paper winding motor (201) is a torque motor and is used for winding the release paper; The tension control module (3) comprises a tension control air cylinder (301), an air cylinder connecting plate (303), a tension control sliding rail (304), a guide rail sliding block (307), two rotating rollers (308) and a tension control shaft (309); The tension control air cylinder (301) is fixed on the back plate, the tension control sliding rail (304) is arranged below the tension control air cylinder (301) and is fixed on the back plate; the air cylinder connecting plate (303) is in sliding fit with the tension control sliding rail (304), the air cylinder connecting plate (303) is controlled to move up and down by the tension control air cylinder (301); the tension control shaft (309) is fixedly installed on the air cylinder connecting plate (303) and can passively rotate around the shaft; the two rotating rollers (308) are symmetrically arranged below the tension control shaft (309) and are fixedly installed on the back plate, and the two rotating rollers (308) can passively rotate around the shaft; the two rotating rollers (308) and the tension control shaft (309) cooperate to pull the pre-impregnated fiber material, the height of the tension control shaft (309) is adjusted by the tension control air cylinder (301), namely the distance between the tension control shaft (309) and the rotating rollers (308) is adjusted, and the pulling force on the pre-impregnated fiber material is adjusted; The auxiliary clamping module (4) comprises a clamping air cylinder (401), a clamping sliding rail (402), a clamping connecting plate (403), a fixed shaft (407) and a clamping shaft (408). The clamping cylinder (401) is fixed on the bottom plate, the clamping slide rail (402) is arranged below the clamping cylinder (401), the clamping connecting plate (403) is in sliding fit with the clamping slide rail (402), the position of the clamping connecting plate (403) is controlled by the clamping cylinder (401), the clamping shaft (408) is fixed on the lower part of the clamping connecting plate (403), and a plurality of one-way rotating clamping rings are arranged on the clamping shaft (408) in parallel; the fixed shaft (407) is fixedly installed on the back plate below the clamping shaft (408), a same number of clamping rings are also installed on the fixed shaft (407), and the clamping rings on the fixed shaft (407) are one-to-one corresponding with the clamping rings on the clamping shaft (408) and rotate in opposite directions, the clamping rings on the clamping shaft (408) and the fixed shaft (407) are pressed, and the pre-impregnated material is pulled to the corresponding clamping ring in a strip-shaped manner by relying on the one-way movement characteristics of the clamping ring, and the pre-impregnated material is kept in a taut state.

3. The multi-roll prepreg loading device for a prepreg cutting apparatus according to claim 2, wherein The differential shaft (103) is inflatable, so that the pre-impregnated tape has a certain tension during feeding.

4. The multi-roll prepreg loading device for prepreg cutting equipment according to claim 3, wherein, The air pressure of the differential shaft (103) can be adjusted to adjust the traction torque.

5. The multi-roll prepreg loading device for prepreg cutting equipment according to claim 2, wherein, First and second release paper baffle plates (204) and (205) are respectively installed on the circumferential surfaces of the two side end faces of each release paper winding motor (201), so that the release paper does not deviate during winding.

6. A multi-roll prepreg loading device for a prepreg cutting apparatus according to claim 5, wherein The first and second release paper baffle plates (204) and (205) are provided with slits through which a wallpaper cutter can pass, so that the wound release paper can be removed.

7. The multi-roll prepreg loading device for prepreg cutting equipment according to claim 2, wherein A tension sensor is mounted on the tension control shaft (309), and the height of the tension control shaft (309) is controlled by a pre-impregnated material cutting equipment control system.

8. The multi-roll prepreg loading device for prepreg cutting equipment according to claim 2, wherein, The clamping ring is composed of a one-way bearing (406) and a bearing sleeve (404) mounted outside the one-way bearing (406).

9. A multi-roll prepreg feeding device for a prepreg cutting apparatus according to claim 2, wherein The fixed shaft (407) is provided with a motor to provide traction power for the pre-impregnated material.

10. A method for feeding a plurality of rolls of prepreg to a prepreg cutting apparatus, implemented by a feeding device for a plurality of rolls of prepreg according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: S1. A roll of material (102) is mounted on each differential ring on the differential shaft (103); S2. The end of the release paper on the surface of the roll of material (102) is separated strip by strip and fixed on each release paper winding motor (201) one by one, and the release paper winding motor (201) is started to wind the release paper; S3. The material head of the pre-impregnated material of the first roll of material (102) is sequentially pulled under the first rotating roller (308), above the tension control shaft (309) and under the second rotating roller (308), and then pulled between the fixed shaft (407) and the clamping shaft (408); S4. The clamping shaft (408) is controlled by the clamping cylinder (401) to move downward to the two clamping rings at the corresponding position of the clamping shaft (408) and the fixed shaft (407), the pre-impregnated material is clamped, and the pre-impregnated material is taut by rotating the clamping ring; S5. At the same time, the material head of the pre-impregnated material of the second roll of material (102) is pulled through the tension control module (3) and then pulled between the two clamping rings at the corresponding position, and the pre-impregnated material is taut by rotating the clamping ring at the same time; S6. Repeat S5 to complete the feeding process of all rolls of pre-impregnated material (102); S7. The pre-impregnated material cutting equipment starts feeding, the clamping rings on the fixed shaft (407) and the clamping rings on the clamping shaft (408) rotate synchronously, so that multiple pre-impregnated materials are simultaneously fed.

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