A production method and production device for a thermoplastic composite material

Abstract

The present invention relates to the field of composite materials, and particularly to a production method and a production device for thermoplastic composite materials. The problems to be solved are as follows: existing thermoplastic composite material production equipment cannot recycle the excess polyphenylene sulfide powder in the equipment while operating, and at the same time, existing equipment cannot preheat continuous carbon fibers and cannot comb out the gaps in a single bundle of carbon fibers, resulting in a small contact area between the polyphenylene sulfide powder and the continuous carbon fibers and uneven mixing. Technical solution: A thermoplastic composite material production device includes a fixed frame, a limiting disk, etc.; two symmetrically arranged limiting disks are installed on the fixed frame. Through the reciprocating rotation of the mixing tank, and at the same time, with the cooperation of the annular cavity, the collection groove and the guide plate arranged in the mixing tank, the excess polyphenylene sulfide powder in the equipment is concentrated, effectively reducing the equipment maintenance cost and the production cost of the prepreg tape.

Description

Technical Field

[0001] The present invention relates to the field of composite materials, and particularly to a production method and a production device for thermoplastic composite materials. Background Art

[0002] In the production process of thermoplastic composite materials, the preparation of prepreg is very important. The quality of the prepreg will directly affect the final strength of the thermoplastic composite materials. In the production method of thermoplastic composite prepreg tape with polyphenylene sulfide as the matrix and continuous carbon fiber as the reinforcing material, the method of attaching polyphenylene sulfide powder to the surface of carbon fiber is called powder impregnation method. The powder impregnation method has the advantages of less fiber damage, no degradation of polymer and low cost compared with the traditional melt impregnation method. However, the existing powder impregnation equipment cannot recycle the redundant polyphenylene sulfide powder in the equipment while the equipment is running, resulting in the deposition of polyphenylene sulfide powder in the equipment, which is difficult to clean and maintain, and increases the production cost of the composite prepreg tape.

[0003] Furthermore, in the production process of continuous carbon fiber, it is necessary to bundle the continuous carbon fiber by applying an adhesive on the surface. However, in the production process of prepreg tape, the adhesive on the surface of continuous carbon fiber at room temperature will prevent the polyphenylene sulfide powder from uniformly and fully adhering to the surface of continuous carbon fiber. Moreover, the surface of a single bundle of carbon fiber is relatively smooth, which is not conducive to the full impregnation of polyphenylene sulfide powder into the carbon fiber. At the same time, when the existing powder impregnation equipment preheats the carbon fiber, it cannot comb the gaps in a single bundle of carbon fiber, resulting in a small contact area between the polyphenylene sulfide powder and the continuous carbon fiber, and failing to achieve the purpose of fully mixing the polyphenylene sulfide powder and the continuous carbon fiber. Summary of the Invention

[0004] In order to overcome the disadvantages that the existing thermoplastic composite material production equipment cannot recycle the redundant polyphenylene sulfide powder in the equipment while running, and at the same time the existing equipment cannot comb the gaps in a single bundle of carbon fiber while preheating the continuous carbon fiber, resulting in a small contact area between the polyphenylene sulfide powder and the continuous carbon fiber and uneven mixing, the present invention provides a production method and a production device for thermoplastic composite materials.

[0005] A production method for thermoplastic composite materials includes the following production steps:

[0006] S1: Raw material mixing. Through the cooperation of a mixing tank (3) and a nozzle (208), the polyphenylene sulfide powder is fully

[0007] sprayed onto the surface of a carbon fiber group (4);

[0008] S2: Recycling of polyphenylene sulfide powder. A guide plate (6) guides the redundant polyphenylene sulfide powder into an annular cavity (3001) for recycling;

[0009] S3: Recycling. The feeder (302) re-inhales the polyphenylene sulfide powder in the annular cavity (3001)

[0010] into the hopper (202) to reduce waste;

[0011] S4: Heating and dispersion. The heating tube (403) heats the carbon fiber group (4) during the transmission process, causing the adhesive between the carbon fiber filaments on the carbon fiber group (4) to melt preliminarily, and then the carding device (406) disperses the carbon fiber filaments, increasing the contact area between the carbon fiber group (4) and the polyphenylene sulfide powder,

[0012] improving the mixing effect;

[0013] S5: Finishing treatment. The limiting roller (504) adjusts the chaotic carbon fiber group (4) with different spacings, increasing the spacing between the carbon fiber bundles on the carbon fiber group (4) and improving the mixing effect of the polyphenylene sulfide powder and the carbon fiber group (4).

[0014] A thermoplastic composite production device includes a fixing frame and a limiting disk; two symmetrically arranged limiting disks are installed on the fixing frame; it also includes a mixing tank, a flow deflector, a guiding plate, a recovery system, and a pretreatment system; a reciprocally rotatable mixing tank is arranged on the two limiting disks; a feed port for feeding polyphenylene sulfide powder is arranged on the mixing tank; a flow deflector for recovering excess polyphenylene sulfide powder is installed inside the mixing tank; an annular cavity for storing excess polyphenylene sulfide powder is opened inside the mixing tank; several collecting grooves for collecting excess polyphenylene sulfide powder are opened on the inner side surface of the mixing tank; each collecting groove communicates with the annular cavity; two symmetrically arranged guiding plates for guiding the excess polyphenylene sulfide powder on the inner wall of the mixing tank into the collecting groove are installed on each collecting groove; two adjacent guiding plates are combined in a shape of an inverted V.

[0015] Optionally, it further includes a feeding assembly, and the feeding assembly includes a support frame, a hopper, a first feeding pipe, a feeding pump, a pressure booster, a second feeding pipe, a third feeding pipe, and a nozzle; a support frame is fixedly connected to the rear side of the fixing frame; a hopper for storing polyphenylene sulfide powder is fixedly connected to the support frame; the lower side of the hopper communicates with a first feeding pipe; a feeding pump for extracting polyphenylene sulfide powder is connected to the first feeding pipe; a pressure booster for pressurizing the polyphenylene sulfide powder is installed on the upper side of the feeding pump; a second feeding pipe for transporting the polyphenylene sulfide powder into the mixing tank is communicated with the pressure booster; the second feeding pipe penetrates through the outer wall of the mixing tank; a third feeding pipe for guiding the direction of the polyphenylene sulfide powder is communicated with the second feeding pipe; several nozzles for spraying the polyphenylene sulfide powder are installed on the lower side of the third feeding pipe.

[0016] Optionally, the recycling system includes a fixture, a suction device, a first elastic member, a first suction pipe, a suction pump, a second suction pipe, a second elastic member, and a limit block; a fixture is provided below the mixing tank; the upper part inside the fixture is fixedly connected with a first elastic member; a suction device for sucking the polyphenylene sulfide powder in the annular cavity is installed on the upper side of the first elastic member; several suction holes are annularly arranged on the upper side of the suction device, and a protruding portion is provided on the lower side of the suction device; the lower side of the suction device is communicated with a first suction pipe; the first suction pipe is communicated with a suction pump; the suction pump is communicated with a second suction pipe; the first suction pipe is communicated with the hopper; a second elastic member is fixedly connected inside the flow guide device; a limit block for blocking the discharge port on the lower side of the flow guide device is fixedly connected to the lower side of the second elastic member.

[0017] Optionally, several suction holes are annularly arranged on the upper side of the suction device.

[0018] Optionally, a protruding portion is provided on the lower side of the suction device.

[0019] Optionally, the pretreatment system includes a first fixing plate, a second fixing plate, a heating pipe, a first rotating shaft, a third elastic member, and a carding device; two vertically symmetric first fixing plates are fixedly connected to the limiting disc on the left side of the fixing frame; a second fixing plate is fixedly connected to the right side of each of the two first fixing plates; two heating pipes for preheating the surface of the carbon fiber group are symmetrically installed vertically on the opposite sides of the two first fixing plates; several third elastic members are fixedly connected to the inner sides of the two second fixing plates; a first rotating shaft is fixedly connected to each of the third elastic members; a carding device for carding the gaps between single carbon fibers in the carbon fiber group is fixedly connected to each of the first rotating shafts.

[0020] Optionally, the carding device is set as a triangular plate, and several carding devices are arranged in a staggered manner, arranged in a zigzag shape.

[0021] Optionally, it further includes a gap reduction component, and the gap reduction component includes a third fixing plate, an electric rotating shaft, a second rotating shaft, a limiting roller, a fourth elastic member, a slide rail, a slider, and a sliding plate; two front and rear symmetric third fixing plates are installed on the left side of the fixing frame; a second rotating shaft is rotatably connected to the two third fixing plates; an electric rotating shaft is fixedly connected to the rear side of the second rotating shaft; a wavy chute is arranged on the outer surface of the electric rotating shaft; a limiting roller for reducing the gap between each carbon fiber in the carbon fiber group is movably connected to the front side of the second rotating shaft; a fourth elastic member is fixedly connected to the front side of the limiting roller; the fourth elastic member is fixedly connected to the third fixing plate on the front side of the fixing frame; a slider is slidably connected to the wavy chute on the electric rotating shaft; a slide rail is fixedly connected to the third fixing plate on the rear side of the fixing frame; a sliding plate for driving the limiting roller to move is fixedly connected to the lower side of the slider; the sliding plate is slidably connected to the slide rail.

[0022] Optionally, a wavy chute is annularly arranged on the outer side of the electric rotating shaft.

[0023] Compared with the prior art, the present invention has the following advantages: Through the reciprocating rotation of the mixing tank, and in cooperation with the annular cavity, collection tank and guide plate provided in the mixing tank, the redundant polyphenylene sulfide powder in the equipment is concentrated. Then, through the cooperation of the flow guide device and the suction device, without stopping the operation of the equipment, the polyphenylene sulfide powder concentrated in the annular cavity is uniformly recycled into the hopper, effectively reducing the equipment maintenance cost and the production cost of the prepreg;

[0024] The carbon fiber group is preheated by the heating tube to preliminarily melt the adhesive on the surface of the carbon fiber group. Coupled with the cooperation of the carding device, the gaps on the single carbon fiber bundle are carded open, increasing the contact area between the polyphenylene sulfide powder and the carbon fiber, so that the polyphenylene sulfide powder and the carbon fiber can be uniformly and fully mixed, improving the quality of the prepreg and thus enhancing the strength of the thermoplastic composite material;

[0025] Through the cooperation of the electric rotating shaft, slider and sliding plate, the limiting roller can move left and right while rotating, and then drive the multi-bundle continuous carbon fibers on the limiting roller to gather towards the middle of the limiting roller, thereby narrowing the gaps between the carbon fiber bundles, so that the polyphenylene sulfide powder can adhere to the carbon fiber group more fully, improving the quality of the prepreg. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structure schematic diagram of the first type of the present invention;

[0027] Figure 2 It is a three-dimensional structure schematic diagram of the second type of the present invention;

[0028] Figure 3 It is a partial three-dimensional structure schematic diagram of the first type of the present invention;

[0029] Figure 4 It is a partial three-dimensional structure schematic diagram of the second type of the present invention;

[0030] Figure 5 It is a partial cross-sectional view of the first type of the present invention;

[0031] Figure 6 It is a partial cross-sectional view of the second type of the present invention;

[0032] Figure 7 It is a three-dimensional structure schematic diagram of the first type of the recovery system of the present invention;

[0033] Figure 8 It is a three-dimensional structure schematic diagram of the second type of the recovery system of the present invention;

[0034] Figure 9 It is a partial cross-sectional view of the recovery system of the present invention;

[0035] Figure 10Schematic diagram of the first three-dimensional structure of the pretreatment system of the present invention;

[0036] Figure 11 Schematic diagram of the second three-dimensional structure of the pretreatment system of the present invention;

[0037] Figure 12 Schematic diagram of a partial three-dimensional structure of the pretreatment system of the present invention;

[0038] Figure 13 Partial cross-sectional view of the pretreatment system of the present invention;

[0039] Figure 14 Schematic diagram of the three-dimensional structure of the gap reduction component of the present invention;

[0040] Figure 15 Schematic diagram of the first partial three-dimensional structure of the gap reduction component of the present invention;

[0041] Figure 16 Schematic diagram of the second partial three-dimensional structure of the gap reduction component of the present invention.

[0042] The markings of each component in the drawings are as follows: 1 - fixing frame, 2 - limiting disc, 3 - mixing tank, 4 - carbon fiber group, 5 - flow guide device, 6 - guide plate, 101 - servo motor, 102 - gear, 103 - toothed ring, 104 - conveyor roller, 201 - support frame, 202 - hopper, 203 - first feeding pipe, 204 - feeding pump, 205 - pressurizer, 206 - second feeding pipe, 207 - third feeding pipe, 208 - nozzle, 301 - fixer, 302 - suction device, 30201 - protruding part, 303 - first elastic member, 304 - first suction pipe, 305 - suction pump, 306 - second suction pipe, 307 - second elastic member, 308 - limiting block, 401 - first fixing plate, 402 - second fixing plate, 403 - heating pipe, 404 - first rotating shaft, 405 - third elastic member, 406 - carding device, 501 - third fixing plate, 502 - electric rotating shaft, 503 - second rotating shaft, 504 - limiting roller, 505 - fourth elastic member, 506 - slide rail, 507 - slider, 508 - slide plate, 3001 - annular cavity, 3002 - collection tank, 30201 - protruding part. Detailed implementation manners

[0043] A production method of a thermoplastic composite material includes the following production steps:

[0044] S1: Raw material mixing, through the cooperation of the mixing tank (3) and the nozzle (208), the polyphenylene sulfide powder is fully sprayed onto the surface of the carbon fiber group (4);

[0045] sprayed evenly on the surface of the carbon fiber group (4);

[0046] S2: Polyphenylene sulfide powder recovery. The guide plate (6) guides the excess polyphenylene sulfide powder into the annular

[0047] cavity (3001) for recovery;

[0048] S3: Reuse. The suction device (302) sucks the polyphenylene sulfide powder in the annular cavity (3001)

[0049] back into the hopper (202) to reduce waste;

[0050] S4: Heating and dispersion. The heating tube (403) heats the carbon fiber group (4) during transmission,

[0051] so that the adhesive between the carbon fiber filaments on the carbon fiber group (4) melts initially, and then the carbon fiber filaments are dispersed by the carding device (406)

[0052] to improve the contact area between the carbon fiber group (4) and the polyphenylene sulfide powder, S5: Finishing treatment. The spacing roller (504) adjusts the chaotic carbon fiber group (4) with different spacings,

[0053] increasing the spacing between the carbon fiber bundles on the carbon fiber group (4) to improve the mixing effect between the polyphenylene sulfide powder and the carbon fiber group (4). Example 1

[0054] As Figure 3-6 shown, a thermoplastic composite production device includes a fixed frame 1 and a limit disk 2; two symmetrically arranged limit disks 2 are installed on the fixed frame 1;

[0055] It further includes a mixing tank 3, a flow guide device 5, a guide plate 6, a recovery system and a pretreatment system; a mixing tank 3 is arranged on the two limit disks 2; the mixing tank 3 is provided with a feed port for feeding polyphenylene sulfide powder; the polyphenylene sulfide powder and the carbon fiber group 4 are mixed through the mixing tank 3; a polyphenylene sulfide powder flow guide device 5 is installed inside the mixing tank 3; an annular cavity 3001 for polyphenylene sulfide powder is opened inside the mixing tank 3; the annular cavity 3001 is used to centrally recover the excess polyphenylene sulfide powder to reduce waste; at least two polyphenylene sulfide powder collection grooves 3002 are opened on the inner side surface of the mixing tank 3; each collection groove 3002 is communicated with the annular cavity 3001; two symmetrically arranged polyphenylene sulfide powder guide plates 6 are installed on each collection groove 3002; two adjacent guide plates 6 are combined in a shape of an eight, and the guide plates 6 guide the polyphenylene sulfide powder remaining on the inner wall of the mixing tank 3 into the collection groove 3002, and then store the excess polyphenylene sulfide powder into the annular cavity 3001, while preventing the polyphenylene sulfide powder already collected in the annular cavity 3001 from re-entering the mixing tank 3.

[0056] Two adjacent guide plates 6 are arranged in a V-shaped configuration. While guiding the polyphenylene sulfide powder on the inner wall of the mixing tank 3 into the annular cavity 3001, it prevents the polyphenylene sulfide powder already collected in the annular cavity 3001 from re-entering the mixing tank 3.

[0057] It further includes a driving assembly, which includes a servo motor 101, a gear 102, a toothed ring 103, and a conveying roller 104. The servo motor 101 is installed on the right side of the fixed frame 1. The output end of the servo motor 101 is installed with the gear 102. The outer surface of the mixing tank 3 is fixedly connected with the toothed ring 103. The toothed ring 103 meshes with the gear 102. By driving the gear 102 to rotate through the servo motor 101, the toothed ring 103 meshing with the gear 102 is driven to rotate, thereby realizing the reciprocating rotation of the mixing tank 3 between the two limit disks 2. Through the reciprocating rotation of the mixing tank 3, the polyphenylene sulfide powder is mixed with the carbon fiber group 4. Through the two conveying rollers 104, the carbon fiber group 4 is conveyed from the left side of the mixing tank 3 to the right side of the mixing tank 3, thereby realizing the left-right translation of the carbon fiber group 4.

[0058] It further includes a feeding assembly, which includes a support frame 201, a hopper 202, a first feeding pipe 203, a feeding pump 204, a pressure booster 205, a second feeding pipe 206, a third feeding pipe 207, and a spray head 208. The support frame 201 is bolted to the rear side of the fixed frame 1. The polyphenylene sulfide powder hopper 202 is fixedly connected to the support frame 201. The hopper 202 can stably provide polyphenylene sulfide powder for subsequent steps. The lower side of the hopper 202 is communicated with the first feeding pipe 203. The polyphenylene sulfide powder feeding pump 204 is connected to the first feeding pipe 203. The polyphenylene sulfide powder in the hopper 202 is pumped into the first feeding pipe 203 through the feeding pump 204. The polyphenylene sulfide powder pressure booster 205 is installed on the upper side of the feeding pump 204. The polyphenylene sulfide powder second feeding pipe 206 is communicated with the pressure booster 205. The second feeding pipe 206 penetrates the outer wall of the mixing tank 3. The polyphenylene sulfide powder third feeding pipe 207 is communicated with the second feeding pipe 206. A plurality of spray heads 208 for polyphenylene sulfide powder are installed on the lower side of the third feeding pipe 207. By pressurizing the polyphenylene sulfide in the second feeding pipe 206 through the pressure booster 205, the polyphenylene sulfide powder is further conveyed to the third feeding pipe 207. Further, the polyphenylene sulfide powder is sprayed onto the inner surface of the mixing tank 3 and the surface of the carbon fiber group 4 through the plurality of spray heads 208 on the third feeding pipe 207.

[0059] The process of mixing polyphenylene sulfide powder and carbon fiber in the present invention is as follows:

[0060] First, the carbon fiber group 4 is conveyed from the empty slots on the left limiting plate 2 to the mixing tank 3 by the conveying rollers 104 on the left and right sides of the driving fixing frame 1, and then output from the empty slots on the right limiting plate 2, realizing the transmission of the carbon fiber group 4 from left to right. At this time, the carbon fiber group 4 is in a flattened and straightened state in the mixing tank 3. Then, the feeding pump 204 is controlled to start working. The polyphenylene sulfide powder in the hopper 202 is extracted into the first feeding pipe 203 through the feeding pump 204, and then the polyphenylene sulfide powder in the first feeding pipe 203 is conveyed into the second feeding pipe 206. At the same time, when the polyphenylene sulfide powder passes through the pressure booster 205, the pressure booster 205 pressurizes the polyphenylene sulfide powder in the second feeding pipe 206 and conveys it into the third feeding pipe 207. The pressurized polyphenylene sulfide powder is finally sprayed into the mixing tank 3 through the nozzle 208. Since the carbon fiber group 4 is located directly below the nozzle 208, the polyphenylene sulfide powder sprayed out from the nozzle 208 will adhere to the upper surface of the carbon fiber group 4. During the mixing process, by pressurizing and spraying the polyphenylene sulfide powder, and at this time the carbon fiber group 4 is in a flattened and straightened state in the mixing tank 3, the contact area between the carbon fiber group 4 and the polyphenylene sulfide powder is effectively increased, improving the mixing effect. The excess polyphenylene sulfide powder slides down along the inner wall of the mixing tank 3, so that part of the polyphenylene sulfide powder is deposited at the bottom of the inner wall of the mixing tank 3, and at the same time, part of the polyphenylene sulfide powder will adhere to the inner wall of the mixing tank 3. At this time, the servo motor 101 is controlled to start working. The servo motor 101 drives the gear 102 to rotate reciprocally, and then the gear 102 synchronously drives the gear ring 103 to rotate reciprocally, and then drives the mixing tank 3 to rotate reciprocally through the gear ring 103. Taking the view from left to right as a reference, the rotation process of the mixing tank 3 is to rotate clockwise by 180 degrees first, and then rotate counterclockwise by 180 degrees to reset. During the rotation process, in order to prevent the second feeding pipe 206 from being severely deformed, the second feeding pipe 206 is set as a flexible pipe, so that the second feeding pipe 206 can be stretched within a certain range and ensure that the polyphenylene sulfide powder is smoothly conveyed into the third feeding pipe 207. During this process, the third feeding pipe 207 and the nozzle 208 intermittently rotate below the carbon fiber group 4, so as to realize spraying the polyphenylene sulfide powder onto the lower surface of the carbon fiber group 4. At the same time, the polyphenylene sulfide powder adhering to the inner wall of the mixing tank 3 moves along the inner wall of the mixing tank 3. Since there are several collecting grooves 3002 on the inner wall of the mixing tank 3, and two guiding plates 6 combined in a shape of an eight-character are arranged on the collecting groove 3002, the excess polyphenylene sulfide powder will fall into the collecting groove 3002 under the guidance of the guiding plates 6, and then be collected in the annular cavity 3001 communicated with the collecting groove 3002. Then, through the cooperation of the flow guide device 5 and the discharge hole on the lower side of the mixing tank 3, the excess polyphenylene sulfide powder in the mixing tank 3 is discharged. At the same time, while guiding the polyphenylene sulfide powder on the inner wall of the mixing tank 3 into the annular cavity 3001, two guiding plates 6 combined in a shape of an eight-character,It can effectively prevent the collected polyphenylene sulfide powder in the annular cavity 3001 from re-entering the mixing tank 3, which affects the recovery of the polyphenylene sulfide powder inside the mixing tank 3.

[0061] Embodiment 2

[0062] Based on Embodiment 1, as Figure 7-9 shown,

[0063] The recovery system includes a fixer 301, a suction device 302, a first elastic member 303, a first suction pipe 304, a suction pump 305, a second suction pipe 306, a second elastic member 307 and a limit block 308; a fixer 301 is provided below the mixing tank 3; the upper part inside the fixer 301 is fixedly connected with a first elastic member 303; the first elastic member 303 is a spring; a suction device 302 is installed on the upper side of the first elastic member 303; a plurality of suction holes are annularly arranged on the upper side of the suction device 302, and a protrusion 30201 is arranged on the lower side of the suction device 302. Through the cooperation of the suction holes on the suction device 302 and the flow guide device 5, the polyphenylene sulfide powder in the annular cavity 3001 is extracted, and at the same time, the displacement of the suction device 302 during the extraction process is prevented through the protrusion 30201; the lower side of the suction device 302 is communicated with a first suction pipe 304; a suction pump 305 is communicated on the first suction pipe 304; a second suction pipe 306 is communicated on the suction pump 305; the first suction pipe 304 is communicated with the hopper 202; the excess polyphenylene sulfide powder is recovered into the hopper 202 through the second suction pipe 306; a second elastic member 307 is fixedly connected inside the flow guide device 5; a limit block 308 is fixedly connected to the lower side of the second elastic member 307; through the cooperation of the suction device 302, the first suction pipe 304 and the suction pump 305, the polyphenylene sulfide powder in the annular cavity 3001 is extracted into the first suction pipe 304, and then the excess polyphenylene sulfide powder is recovered into the hopper 202, realizing the recycling of the polyphenylene sulfide powder and reducing waste.

[0064] A plurality of suction holes are annularly arranged on the upper side of the suction device 302, and the polyphenylene sulfide powder in the annular cavity 3001 is recovered through the cooperation of the plurality of suction holes and the flow guide device 5.

[0065] A protrusion 30201 is arranged on the lower side of the suction device 302, and the displacement of the suction device 302 during the extraction process is prevented through the protrusion 30201, maintaining the stability of the suction device 302.

[0066] The process of the present invention for recovering the excess polyphenylene sulfide powder is as follows:

[0067] When the mixing tank 3 rotates reciprocally, the excess polyphenylene sulfide powder in the mixing tank 3 will be collected into the annular cavity 3001. At the same time, under the action of the first elastic member 303, the suction device 302 located below the mixing tank 3 will closely adhere to the outer surface of the mixing tank 3. At this time, the first elastic member 303 is in a compressed state. A discharge hole is provided at the corresponding position of the mixing tank 3 and the suction device 302. At this time, the limiting block 308 blocks the discharge hole provided on the mixing tank 3, thereby preventing the polyphenylene sulfide powder in the annular cavity 3001 from leaking through the discharge hole on the mixing tank 3, resulting in waste of polyphenylene sulfide powder. When the suction device 302 is aligned with the discharge hole on the lower side of the mixing tank 3, under the action of the first elastic member 303, the suction device 302 will pop out and insert into the discharge hole on the lower side of the mixing tank 3. Since a through hole is also provided at the position of the flow guide device 5 corresponding to the discharge hole on the mixing tank 3, and the through hole is communicated with the discharge hole on the lower side of the mixing tank 3, when the suction device 302 inserts into the discharge hole on the lower side of the flow guide device 5, the limiting block 308 used to block the through hole on the lower side of the flow guide device 5 is simultaneously pushed upward. Under the action of the second elastic member 307, the limiting block 308 will retract into the groove above the limiting block 308. At the same time, several suction holes on the suction device 302 will be communicated with the middle empty slot of the flow guide device 5. At this time, the protruding portion 30201 on the suction device 302 will be embedded into the corresponding groove on the lower side of the mixing tank 3, as shown in the figure, so as to prevent the suction device 302 from generating displacement when extracting polyphenylene sulfide powder, affecting the extraction effect. Then, by driving the suction pump 305, the polyphenylene sulfide powder in the annular cavity 3001 is extracted into the first suction pipe 304 through the cooperation of the flow guide device 5 and the suction device 302, and then the polyphenylene sulfide powder is recycled into the hopper 202 through the second suction pipe 306 communicated with the suction pump 305, thereby realizing the cyclic recycling of polyphenylene sulfide powder. While preventing the polyphenylene sulfide powder from polluting external equipment, the efficient utilization of polyphenylene sulfide powder is realized, effectively reducing the production cost and equipment maintenance cost of the composite material.

[0068] Example 3

[0069] On the basis of Example 1, as Figure 10-13 shown,

[0070] The pretreatment system includes a first fixing plate 401, a second fixing plate 402, a heating tube 403, a first rotating shaft 404, a third elastic member 405 and a carding device 406; two vertically symmetric first fixing plates 401 are fixedly connected to the limiting disc 2 on the left side of the fixing frame 1; a second fixing plate 402 is fixedly connected to the right side of each of the two first fixing plates 401; two vertically symmetric heating tubes 403 are installed on the opposite sides of the two first fixing plates 401; the surface of the carbon fiber group 4 is preheated by the heating tubes 403 so that the polyphenylene sulfide powder can adhere more firmly to the surface of the carbon fiber group 4; a number of third elastic members 405 are fixedly connected to the inner sides of the two second fixing plates 402; the third elastic member 405 is a torsion spring; a first rotating shaft 404 is fixedly connected to each of the third elastic members 405; a carding device 406 is fixedly connected to each of the first rotating shafts 404; the surface of the carbon fiber group 4 is preheated by the heating tubes 403 to preliminarily melt the adhesive on the surface of the carbon fiber group 4, and then the carbon fiber group 4 is translated between the two carding devices 406. The gaps between each bundle of carbon fibers in the carbon fiber group 4 are carded by the carding devices 406 to increase the gaps between each bundle of carbon fibers, so that the polyphenylene sulfide powder can adhere more evenly and firmly to the surface of the carbon fiber group 4.

[0071] The carding device 406 is arranged as a triangular plate, and a number of carding devices 406 are arranged in a staggered manner and in a zigzag pattern. The carbon fiber bundles can be effectively processed by the carding device 406 to improve the adhesion effect between the polyphenylene sulfide powder and the carbon fiber bundles.

[0072] The pretreatment process of the carbon fiber in the present invention is as follows:

[0073] When the carbon fiber leaves the factory, in order to make the fine carbon fibers form bundles, the manufacturer will apply an adhesive to the surface of the carbon fiber. However, the adhesive will hinder the impregnation effect of the resin powder during the production of the composite material. Therefore, the surface of the carbon fiber should be preheated to preliminarily melt the adhesive on the surface of the carbon fiber group 4 and improve the adhesion between the polyphenylene sulfide powder and the carbon fiber group 4. At this time, the carbon fiber group 4 is composed of a number of carbon fiber bundles, and each carbon fiber bundle is composed of a number of carbon fiber filaments.

[0074] Then, through the cooperation of two symmetrically arranged upper and lower heating tubes 403, the upper and lower surfaces of the carbon fiber group 4 between the two heating tubes 403 are preheated. After the preheating is completed, driven by the two conveyor rollers 104, the carbon fiber group 4 continues to move horizontally from left to right in the mixing tank 3. At this time, since the adhesive on the surface of the carbon fiber group 4 has been preliminarily melted, gaps will appear on each bundle of carbon fibers in the carbon fiber group 4. Through the comb 406 arranged in the shape of a triangular plate, and several combs 406 are arranged in a staggered and serrated manner, the top edge of the comb 406 separates the carbon fiber filaments, thereby increasing the gaps between the carbon fiber filaments on the carbon fiber bundle. The increase in the gaps between the carbon fiber filaments can increase the contact area between the carbon fiber group 4 and the polyphenylene sulfide powder, enabling the polyphenylene sulfide powder to fully adhere between the carbon fiber filaments of the carbon fiber bundle. Since the comb 406 is hinged to the second fixing plate 402 through the first rotating shaft 404 and the third elastic member 405, when the comb 406 is not inserted into the gaps between the carbon fiber filaments, due to the uneven distribution of the carbon fiber filaments, the comb 406 may not be smoothly inserted into the gaps between the carbon fiber filaments. At this time, if the comb 406 continuously contacts the carbon fiber bundle and continuously rubs and squeezes, it is easy to cause deformation and damage to the carbon fiber bundle. Therefore, when the comb 406 cannot be smoothly inserted into the gaps between the carbon fiber filaments, the comb 406 is squeezed by the carbon fiber bundle and automatically rotates and deflects slightly around the first rotating shaft 404, so that the side surface of the comb 406 contacts the carbon fiber bundle, thereby preventing damage to the carbon fiber bundle.

[0075] Example 4

[0076] Based on Examples 1-3, as Figure 1 、 Figure 2 and Figure 14-16 shown,

[0077] It further includes a gap reduction component, which includes a third fixing plate 501, an electric rotating shaft 502, a second rotating shaft 503, a limiting roller 504, a fourth elastic member 505, a slide rail 506, a slider 507 and a slide plate 508; two third fixing plates 501 symmetrically arranged front and back are installed on the left side of the fixing frame 1; the second rotating shaft 503 is rotatably connected to the two third fixing plates 501; the electric rotating shaft 502 is fixedly connected to the rear side of the second rotating shaft 503; a wavy chute is arranged on the outer surface of the electric rotating shaft 502; the limiting roller 504 is movably connected to the front side of the second rotating shaft 503; the fourth elastic member 505 is fixedly connected to the front side of the limiting roller 504; the fourth elastic member 505 is a spring; the fourth elastic member 505 is fixedly connected to the third fixing plate 501 on the front side of the fixing frame 1; the slider 507 is slidably connected to the wavy chute on the electric rotating shaft 502; the slide rail 506 is fixedly connected to the third fixing plate 501 located at the rear side of the fixing frame 1; the slide plate 508 is fixedly connected to the lower side of the slider 507; the slide plate 508 is slidably connected to the slide rail 506; by rotating the electric rotating shaft 502, the second rotating shaft 503 and the limiting roller 504 are driven to rotate synchronously, and at the same time, the slider 507 slides in the wavy chute on the electric rotating shaft 502, thereby driving the slide plate 508 to translate left and right in the slide rail 506. With the cooperation of the fourth elastic member 505, the limiting roller 504 is enabled to translate left and right intermittently during rotation, and the gap of the carbon fiber group 4 is adjusted during translation.

[0078] A wavy chute is annularly arranged on the outer side of the electric rotating shaft 502. By means of the cooperation of the wavy chute and the slider 507 thereon, the slide plate 508 is driven to slide in the slide rail 506, so that the limiting roller 504 can translate left and right while rotating, and the gap of the carbon fiber group 4 is adjusted during translation.

[0079] The process of reducing the gap between carbon fiber bundles in the present invention is as follows:

[0080] When the carbon fiber group 4 is transported from left to right by two conveying rollers 104, due to the large gaps between each bundle of carbon fibers in the carbon fiber group 4 and the inconsistent gap sizes, when the carbon fiber group 4 is mixed with polyphenylene sulfide powder in the mixing tank 3, the polyphenylene sulfide powder will slide down from the gaps between each bundle of carbon fibers, and thus it is impossible to make the polyphenylene sulfide powder fully and evenly adhere to the surface of the carbon fiber group 4. Therefore, by the rotation of the electric rotating shaft 502, the second rotating shaft 503 and the limiting roller 504 are driven to rotate synchronously. At the same time, the slider 507 slides in the wavy chute on the electric rotating shaft 502, and then drives the sliding plate 508 to slide left and right in the slide rail 506. With the continuous compression and reset of the fourth elastic member 505, while the limiting roller 504 rotates, it moves left and right, that is, drives each bundle of carbon fibers on the limiting roller 504 to gather towards the middle of the limiting roller 504, thereby narrowing the gaps between each bundle of carbon fibers in the carbon fiber group 4, enabling the subsequent polyphenylene sulfide powder to adhere to the surface of the carbon fiber group 4 more evenly and fully, and realizing the guarantee of the strength of the thermoplastic composite material.

[0081] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A thermoplastic composite material production device, comprising a fixing frame (1) and a limiting disc (2); two symmetrically arranged limiting discs (2) are installed on the fixing frame (1); the characteristics are as follows: It further includes a mixing tank (3), a flow guide (5), a guide plate (6), a recovery system and a pretreatment system; a reciprocally rotatable mixing tank (3) is arranged on two limit discs (2); a feed inlet for feeding polyphenylene sulfide powder is arranged on the mixing tank (3); a flow guide (5) for recovering excess polyphenylene sulfide powder is installed inside the mixing tank (3); an annular cavity (3001) for storing excess polyphenylene sulfide powder is formed inside the mixing tank (3); a plurality of collection grooves (3002) for collecting excess polyphenylene sulfide powder are formed on the inner side surface of the mixing tank (3); each collection groove (3002) is communicated with the annular cavity (3001); two symmetrically arranged upper and lower guide plates (6) for guiding the excess polyphenylene sulfide powder on the inner wall of the mixing tank (3) into the collection groove (3002) are installed on each collection groove (3002); two adjacent guide plates (6) are combined and arranged in a shape of an inverted V. The recovery system includes a fixer (301), a suction device (302), a first elastic member (303), a first suction pipe (304), a suction pump (305), a second suction pipe (306), a second elastic member (307) and a limit block (308); a fixer (301) is arranged below the mixing tank (3); the upper part of the inner side of the fixer (301) is fixedly connected with a first elastic member (303); a suction device (302) for sucking the polyphenylene sulfide powder in the annular cavity (3001) is installed on the upper side of the first elastic member (303); a plurality of suction holes are annularly arranged on the upper side of the suction device (302), and a protrusion (30201) is arranged on the lower side of the suction device (302); the lower side of the suction device (302) is communicated with a first suction pipe (304); a suction pump (305) is communicated with the first suction pipe (304); a second suction pipe (306) is communicated with the suction pump (305); the first suction pipe (304) is communicated with the hopper (202); a second elastic member (307) is fixedly connected inside the flow guide (5); a limit block (308) for blocking the discharge port on the lower side of the flow guide (5) is fixedly connected to the lower side of the second elastic member (307).

2. The thermoplastic composite material production device according to claim 1, characterized in that: It further includes a feeding component, which includes a support frame (201), a hopper (202), a first feeding pipe (203), a feeding pump (204), a pressurizer (205), a second feeding pipe (206), a third feeding pipe (207) and a spray head (208); the support frame (201) is fixedly connected to the rear side of the fixing frame (1); a hopper (202) for storing polyphenylene sulfide powder is fixedly connected to the support frame (201); the lower side of the hopper (202) is communicated with the first feeding pipe (203); a feeding pump (204) for extracting polyphenylene sulfide powder is connected to the first feeding pipe (203); a pressurizer (205) for pressurizing the polyphenylene sulfide powder is installed on the upper side of the feeding pump (204); the pressurizer (205) is communicated with a second feeding pipe (206) for conveying the polyphenylene sulfide powder into the mixing tank (3); the second feeding pipe (206) penetrates through the outer wall of the mixing tank (3); a third feeding pipe (207) for guiding the direction of the polyphenylene sulfide powder is communicated with the second feeding pipe (206); a plurality of spray heads (208) for spraying the polyphenylene sulfide powder are installed on the lower side of the third feeding pipe (207).

3. A thermoplastic composite material production device according to claim 1, characterized in that: A plurality of suction holes are annularly arranged on the upper side of the suction device (302).

4. A thermoplastic composite material production device according to claim 1, characterized in that: A protruding part (30201) is arranged on the lower side of the suction device (302).

5. The thermoplastic composite material production device according to claim 2, characterized in that: The pretreatment system includes a first fixing plate (401), a second fixing plate (402), a heating pipe (403), a first rotating shaft (404), a third elastic member (405) and a combing device (406); two first fixing plates (401) that are symmetrically arranged up and down are fixedly connected to the limiting disc (2) on the left side of the fixing frame (1); a second fixing plate (402) is fixedly connected to the right side of each of the two first fixing plates (401); two heating pipes (403) that are symmetrically arranged up and down and are used for preheating the surface of the carbon fiber group (4) are installed on the opposite sides of the two first fixing plates (401); a plurality of third elastic members (405) are fixedly connected to the inner sides of the two second fixing plates (402); a first rotating shaft (404) is fixedly connected to each of the third elastic members (405); a combing device (406) for combing the gaps between single bundles of carbon fibers in the carbon fiber group (4) is fixedly connected to each of the first rotating shafts (404).

6. The thermoplastic composite material production device according to claim 5, characterized in that: The combing device (406) is arranged as a triangular plate, and a plurality of combing devices (406) are arranged in a staggered manner and are arranged in a zigzag pattern.

7. The thermoplastic composite material production device according to claim 6, characterized in that: It further includes a gap reduction component, which includes a third fixing plate (501), an electric rotating shaft (502), a second rotating shaft (503), a limiting roller (504), a fourth elastic member (505), a slide rail (506), a slider (507) and a slide plate (508); two third fixing plates (501) that are symmetrically arranged front and back are installed on the left side of the fixing frame (1); a second rotating shaft (503) is rotatably connected to the two third fixing plates (501); an electric rotating shaft (502) is fixedly connected to the rear side of the second rotating shaft (503); a wavy chute is arranged on the outer surface of the electric rotating shaft (502); a limiting roller (504) for reducing the gap between each bundle of carbon fibers in the carbon fiber group (4) is movably connected to the front side of the second rotating shaft (503); a fourth elastic member (505) is fixedly connected to the front side of the limiting roller (504); the fourth elastic member (505) is fixedly connected to the third fixing plate (501) on the front side of the fixing frame (1); a slider (507) is slidably connected to the wavy chute on the electric rotating shaft (502); a slide rail (506) is fixedly connected to the third fixing plate (501) located on the rear side of the fixing frame (1); a slide plate (508) for driving the limiting roller (504) to move is fixedly connected to the lower side of the slider (507); the slide plate (508) is slidably connected to the slide rail (506).

8. A thermoplastic composite material production device according to claim 7, characterized in that: A wavy chute is annularly arranged on the outer side of the electric rotating shaft (502).

9. A production method of a thermoplastic composite material, which uses a production device for a thermoplastic composite material according to any one of claims 1-8, characterized in that, The production steps are as follows: S1: Raw material mixing, through the cooperation of the mixing tank and the nozzle, the polyphenylene sulfide powder is fully sprayed onto the surface of the carbon fiber group; S2: Polyphenylene sulfide powder recovery, the guide plate guides the excess polyphenylene sulfide powder into the mixing tank for recovery; S3: Reuse, the suction device sucks the polyphenylene sulfide powder in the mixing tank back into the hopper to reduce waste; S4: Heating and dispersion, the heating tube heats the carbon fiber group during the transmission process, so that the adhesive between the carbon fiber filaments on the carbon fiber group is initially melted, and then the carbon fiber four filaments are dispersed by the carding machine to increase the contact area between the carbon fiber group and the polyphenylene sulfide powder and improve the mixing effect; S5: Finishing treatment, the limiting roller is used to adjust the carbon fiber group with chaotic and uneven spacing, increase the spacing between the carbon fiber bundles on the carbon fiber group, and improve the mixing effect of the polyphenylene sulfide powder and the carbon fiber group.

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