CN113619106B - Continuous fiber reinforced high-performance resin composite material in-situ additive manufacturing equipment - Google Patents
Continuous fiber reinforced high-performance resin composite material in-situ additive manufacturing equipment Download PDFInfo
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- CN113619106B CN113619106B CN202110832015.4A CN202110832015A CN113619106B CN 113619106 B CN113619106 B CN 113619106B CN 202110832015 A CN202110832015 A CN 202110832015A CN 113619106 B CN113619106 B CN 113619106B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/165—Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/209—Heads; Nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/227—Driving means
- B29C64/236—Driving means for motion in a direction within the plane of a layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/227—Driving means
- B29C64/241—Driving means for rotary motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
Abstract
An in-situ additive manufacturing device for a continuous fiber reinforced high-performance resin composite material comprises a support frame, a printing head and a printing hot bed; the support frame comprises an upper support plate and a lower support plate fixed with the upper support plate through three support columns, each support column is provided with a sliding block capable of sliding up and down along the support column, and the sliding block is hinged with a support rod; the printing hot bed is fixed on the lower supporting plate; the print head includes: the device comprises an upper connecting plate, a lower connecting plate connected with the upper connecting plate through a fixing column, four resin trays and a fiber tray which are arranged between the upper connecting plate and the lower connecting plate, a rotating mechanism fixed with the upper end face of the upper connecting plate, and a nozzle fixed with the lower end face of the lower connecting plate; the feeding end of the nozzle is provided with five feeding holes corresponding to the four resin material trays and the fiber material tray respectively; the rotating mechanism is respectively hinged with one end of each of the three support rods. The invention can realize the in-situ impregnation and extrusion of various resin materials and continuous carbon fibers.
Description
Technical Field
The invention belongs to the technical field of continuous carbon fiber reinforced resin, and particularly relates to in-situ additive manufacturing equipment for a continuous fiber reinforced high-performance resin composite material.
Background
The carbon fiber has the advantages of high specific strength, high specific modulus, high temperature resistance, good conductivity and the like, and is widely applied to the fields of aerospace, fan blades, high-speed rail heads, automobile engine covers, bicycle frames and the like. The carbon fiber is generally used in the form of carbon fiber composite material, and at present, the carbon fiber composite material mainly takes continuous carbon fiber reinforced resin as a main material and has better strength and molding processability.
At present, carbon fiber reinforced resin molding technology mainly concentrates on classifying continuous carbon fiber reinforced resin and short carbon fiber reinforced resin, wherein the performance of the continuous carbon fiber reinforced resin is better, but at present, the continuous carbon fiber reinforced resin is mainly compounded by single resin and carbon fiber, and less resin and carbon fiber can be simultaneously impregnated and processed for molding.
For example, chinese patent publication No. CN111791515A discloses a large-tow long carbon fiber thermoplastic composite material and a method for preparing the same, wherein large-tow carbon fibers are drawn by an upper press roll and a lower support roll, enter a mold from an entrance, and leave the mold from an exit, and a resin melt enters the mold from the upper part of the mold cavity, and the large-tow carbon fibers are immersed from top to bottom under the action of gravity, and the two can be in full contact, so that the thermoplastic resin melt and the large-tow carbon fibers can be well impregnated.
Chinese patent publication No. CN105348768A discloses a method for producing a carbon fiber-reinforced thermoplastic resin composite material, which comprises removing a sizing agent from the surface of carbon fibers, plating metal, washing with water, performing surface heat treatment, introducing the carbon fibers into an impregnation die containing molten thermoplastic resin in an opened state, so that the surface of the carbon fibers is coated with the molten thermoplastic resin, cooling, and granulating to obtain the carbon fiber-reinforced thermoplastic resin composite material.
Since the conventional continuous carbon fiber reinforced resin is compounded by a single resin and carbon fibers, a system for simultaneously impregnating and molding a plurality of resins and carbon fibers needs to be designed.
Disclosure of Invention
The invention discloses in-situ additive manufacturing equipment for a continuous fiber reinforced high-performance resin composite material, which realizes in-situ impregnation and extrusion of various resin materials and continuous carbon fibers by redesigning a nozzle and a supporting rotating mechanism thereof.
An in-situ additive manufacturing device for a continuous fiber reinforced high-performance resin composite material comprises a support frame, a printing head and a printing hot bed;
the support frame comprises an upper support plate and a lower support plate fixed with the upper support plate through three support columns, each support column is provided with a sliding block capable of sliding up and down along the support column, and the sliding block is hinged with a support rod; the printing hot bed is fixed on the lower supporting plate;
the print head includes: the device comprises an upper connecting plate, a lower connecting plate connected with the upper connecting plate through a fixing column, four resin trays and a fiber tray which are arranged between the upper connecting plate and the lower connecting plate, a rotating mechanism fixed with the upper end face of the upper connecting plate, and a nozzle fixed with the lower end face of the lower connecting plate; the feeding end of the nozzle is provided with five feeding holes corresponding to four resin material trays and one fiber material tray respectively; the rotating mechanism is respectively hinged with one end of each of the three support rods.
Furthermore, each supporting upright post comprises two polished rods arranged in parallel and a screw rod driven by a screw rod motor, the sliding block is sleeved on the polished rods and the screw rod, and the screw rod is driven by the screw rod motor to rotate so as to drive the sliding block to slide up and down along the polished rods.
Furthermore, the feeding end of the nozzle is provided with a fiber feeding hole and four resin feeding holes; the fiber feeding holes are located in the center, the four resin feeding holes are uniformly arranged on the periphery of the fiber feeding holes, and the distance between the four resin feeding holes and the fiber feeding holes is 15-25 mm;
the nozzle is provided with a heating module and a temperature control module between the fiber feed port and the resin feed port;
the discharge end of nozzle is equipped with a fibre discharge gate and four resin discharge gates, and four resin discharge gates evenly arrange around the fibre discharge gate, and the interval with the fibre discharge gate is 0.2 ~ 2.5 mm.
Furthermore, four extruders are fixed on the lower end face of the lower connecting plate, input ends of the four extruders are in one-to-one correspondence with the four resin trays, and output ends of the four extruders are connected with four resin feed inlets of the nozzle.
Furthermore, the extruder is connected with the resin feed port through a throat pipe, one end of the throat pipe is in threaded connection with the resin feed port, and the other end of the throat pipe is fixed with the output end of the extruder through a set screw; polytetrafluoroethylene tubes for resin materials and fiber materials to pass through are respectively arranged in the throat tube and the fiber feeding port.
Further, the rotary mechanism includes: the rotating motor is fixed on the motor connecting plate, the output end of the rotating motor is connected with the rotating fixed connecting piece through the coupler, and the rotating fixed connecting piece is fixedly connected with the upper connecting plate.
Furthermore, a first connecting plate is fixed below the motor connecting plate, and the first connecting plate is fixed with the upper end of the bearing fixing shell; a first bearing, a sliding ring and a second bearing are arranged in the bearing fixing shell;
the inner ring of the first bearing is fixed on the sliding ring through an elastic washer; the inner ring of the second bearing is in interference fit with the rotary fixed connecting piece; and the bearing end cover is fixedly connected with the bearing fixing shell and used for fixing the outer ring of the second bearing.
Through the rotating mechanism with the structure, the printing head made of multiple materials can rotate around the axis of the printing head infinitely, and the problem of winding of wires cannot occur.
Furthermore, at least two fixing columns are arranged between the upper connecting plate and the lower connecting plate, and at least one vertical rod is arranged on the lower connecting plate; the fixed column and the vertical rod are both provided with horizontal support rods, and the resin material disc and the fiber material disc are rotatably sleeved on the corresponding horizontal support rods.
Preferably, the fiber material tray is arranged in the middle of the four resin material trays. The fiber material tray is arranged at the position close to the middle, so that the resistance is smaller and the smoothness is higher when the fibers in the fiber material tray enter the fiber feeding hole at the center of the nozzle.
Alternatively, the resin material filled in the four resin trays comprises resins such as PLA, ABS, TPU, nylon, PC, PEEK and PPSU.
Alternatively, the fibers loaded in the fiber tray comprise continuous carbon fiber tows with filament numbers of 1k,3k,6k,12k,24k,48k, and the like.
Compared with the prior art, the invention has the following beneficial effects:
1. the printing head is enabled to rotate around the axis of the printing head infinitely by arranging the rotating mechanism, so that the problem of winding of a lead wire is solved; the nozzle is matched with four resin trays and one fiber tray, so that four inlets and four outlets of resin materials and inlet and outlet of continuous fibers can be realized simultaneously; the heating module and the temperature control module on the nozzle can heat the resin material to a specified temperature, and the resin material is better compounded with the continuous fibers.
2. The invention relates to a support frame with a special structure.A sliding block capable of sliding up and down along a support upright post is arranged on three support upright posts, a support rod is hinged on the sliding block, and the other end of the support rod is fixed with a printing head, so that the printing head can do three-dimensional translational motion in the space above a printing hot bed under the driving of the support rod; meanwhile, the rotating mechanism can rotate around the axis of the motor, so that in-situ impregnation and extrusion of various resin materials and continuous carbon fibers are realized.
Drawings
FIG. 1 is an overall structural view of an in-situ additive manufacturing apparatus for a continuous fiber reinforced high performance resin composite according to the present invention;
FIG. 2 is a block diagram of a printhead according to the present invention;
FIG. 3 is a view of another angle of the printhead of the present invention;
FIG. 4 is a schematic view of the extruder and nozzle assembly of the present invention;
FIG. 5 is a schematic view of a rotary mechanism on a printhead according to the present invention;
FIG. 6 is a structural view of a nozzle in the present invention;
FIG. 7 is a schematic view of the discharge end of the nozzle of the present invention;
Detailed Description
The invention will be described in further detail below with reference to the drawings and examples, which are intended to facilitate the understanding of the invention without limiting it in any way.
As shown in fig. 1, the in-situ additive manufacturing equipment for the continuous fiber reinforced high-performance resin composite material comprises a printing hot bed 1, a first support column 2, a printing head 3, a support rod 4, an upper support plate 5, a second support column 6, a third support column 7, a lower support plate 8 and the like.
The printing hot bed 1 is fixedly connected with the lower supporting plate 8, and the upper supporting plate 5 is fixedly connected with the lower supporting plate 8 through the first supporting upright 2, the second supporting upright 6 and the third supporting upright 7. Every support post all is equipped with the gliding slider from top to bottom along the support post on, and articulated on the slider have a bracing piece 4, and the rotary mechanism who beats printer head 3 upper portion is articulated with bracing piece 4.
In this embodiment, each support column includes two parallel arrangement's polished rod and a lead screw by lead screw motor drive, and the slider cover is established on polished rod and lead screw, drives the lead screw rotation through the lead screw motor and drives the slider and slide from top to bottom along the polished rod. The three sliding blocks can drive the printing head to do three-dimensional translational motion by sliding up and down.
As shown in fig. 2 to 5, the print head includes: a rotary motor 301, a motor connecting plate 302, a first connecting plate 303, a bearing fixing housing 304, a second connecting plate 305 (i.e., an upper connecting plate), a first supporting plate 306, a first resin tray 307, a first fixing tray 308, a first horizontal supporting rod 309, a third connecting plate 310 (i.e., a lower connecting plate), a first bent connecting piece 311, a first extruder 312, a second extruder 313, a second bent connecting piece 314, a second supporting plate 315, a second resin tray 316, a second horizontal supporting rod 317, a second fixing tray 318, a third fixing tray 319, a third fiber tray 320, a third horizontal supporting rod 321, a vertical rod 322, a fourth resin tray 323, a third bent connecting plate 324, a nozzle 325, a third extruder 326, a fourth extruder 327, a fourth bent connecting plate 328, a fourth supporting plate 329, a fifth resin tray 330, a fourth fixing tray 331, a fourth horizontal supporting rod 332, a first resin bundle 333, a second resin bundle 333, a third resin bundle, First polytetrafluoroethylene tube 334, first set screw 335, first throat 336, second resin bundle 337, second polytetrafluoroethylene tube 338, second throat 339, temperature sensor 340, second set screw 341, third throat 342, third set screw 343, third polytetrafluoroethylene tube 344, third resin bundle 345, first heating rod 346, second heating rod 347, fourth polytetrafluoroethylene tube 348, fourth throat 349, fifth polytetrafluoroethylene tube 350, fourth resin bundle 351, fourth set screw 352, third heating rod 353, carbon fiber tow 354, coupling 355, elastic washer 356, first bearing 357, slip ring 358, rotational fixing connector 359, second bearing 360, bearing end cap 361.
As shown in fig. 2 and 3, the rotating motor 301 is fixedly connected to the motor connecting plate 302; the motor connecting plate 302 is fixedly connected with the first connecting plate 303; the first connecting plate 303 is fixedly connected with the bearing fixing shell 304; the second connecting plate 305 (i.e. the upper connecting plate) is fixedly connected with the upper end of the first supporting plate 306; the first supporting plate 306 is fixedly connected with a first horizontal supporting rod 309; the first fixed disk 308 is fixedly connected with the first horizontal support rod 309; the lower end of the first supporting plate 306 is fixedly connected with a third connecting plate 310 (i.e. a lower connecting plate); the first resin tray 307 and the first horizontal support bar 309 are coaxial, and the first resin tray 307 is rotatable about the first horizontal support bar 309.
The upper ends of the second connecting plate 305 and the second supporting plate 315 are fixedly connected; the second supporting plate 315 is fixedly connected with the second horizontal supporting rod 317; the second fixed disc 318 is fixedly connected with the second horizontal support bar 317; the lower end of the second supporting plate 315 is fixedly connected with the third connecting plate 310; the second resin tray 316 and the second horizontal support bar 317 are coaxial, and the second resin tray 316 can rotate around the second horizontal support bar 317.
The third connecting plate 310 is fixedly connected with the lower end of the vertical rod 322; the vertical rod 322 is fixedly connected with the third horizontal support rod 321; the third fixed disc 319 is fixedly connected with a third horizontal support bar 321; the third fiber material tray 320, the fourth resin material tray 323 and the third horizontal support rod 321 are coaxial; the third fiber tray 320 and the fourth resin tray 323 can rotate around the third horizontal support bar 321.
The lower end surface of the third connecting plate 310 is fixedly connected with a first curved connecting piece 311, a second curved connecting piece 314, a third curved connecting piece 324 and a fourth curved connecting piece 328 respectively. The first bending connector 311 is fixedly connected to the first extruder 312. The lower ends of the first bending connector 311, the second bending connector 314, the third bending connector 324, and the fourth bending connector 328 are fixed to the first extruder 312, the second extruder 313, the third extruder 326, and the fourth extruder 327, respectively.
As shown in fig. 4, the first polytetrafluoroethylene tube 334 houses the first resin strand 333; the first extruder 312 is fixedly connected to the first throat 336 by a first set screw 335. The second throat 339 is screwed with the nozzle 325, the second throat 339 is internally provided with a second polytetrafluoroethylene tube 338, and the second polytetrafluoroethylene tube 338 is internally provided with a second resin beam 337. The third throat 342 is in threaded connection with the nozzle 325, a third PTFE tube 344 is arranged in the third throat 342, and a third resin bundle 345 is arranged in the third PTFE tube 344. The fourth throat 349 is in threaded connection with the nozzle 325, and a fifth polytetrafluoroethylene tube 350 is arranged in the fourth throat 349. The fifth polytetrafluoroethylene tube 350 houses a fourth resin bundle 351. The first heating rod 346 and the nozzle 325 are fixed by the second set screw 341; the second heating rod 347 and the nozzle 325 are fixed by a third set screw 343, and the third heating rod 353 and the nozzle 325 are fixed by a fourth set screw 352.
As shown in fig. 5, the shaft of the rotating electric machine 301 and the shaft of the rotating fixed link 359 are elastically connected by a coupling 355; an elastic washer 356 fixes the inner race of the first bearing 357 to a slip ring 358; the rotary fixed connecting piece 359 is fixedly connected with the second connecting plate 305; the inner ring of the second bearing 360 is in interference fit with the rotary fixed connecting piece 359; the bearing end cover 361 is fixed to the outer race of the second bearing 360 by being fixed to the bearing fixing case 304.
As shown in fig. 4, the heating principle of the print head is as follows: the first, second, and third heating rods 346, 347, and 353 may heat the nozzle 325 to a set temperature after being energized, and the temperature sensor 340 may control the actual temperature to fluctuate within a set temperature range by comparing the detected temperature with the set temperature.
The principle of in-situ dip extrusion of the print head is as follows: the printing head has four groups of extruders and auxiliary extrusion mechanisms, wherein the first group comprises: a first resin strand 333, a first polytetrafluoroethylene tube 334, a first extruder 312, a first set screw 335, a first throat 336; second group: a second extruder 313, a second resin strand 337, a second polytetrafluoroethylene tube 338, a second throat 339; third group: a third extruder 326, a first heating rod 346, a third resin strand 345, a third set screw 343; and a fourth group: a fourth extruder 327, a fourth set screw 352, a fourth resin strand 351, and a fifth polytetrafluoroethylene tube 350. The principle of extrusion of a single set of resin is illustrated here with a first set of extruders and an auxiliary extrusion mechanism.
The part of the first resin beam 333 close to the nozzle 325 is molten because of reaching the melting temperature, the part of the first resin beam 333 far from the nozzle 325 does not reach the melting temperature and is in a solid state, and the first resin beam 333 moves in the direction of the first throat 336 close to the nozzle 325 under the action of the extruder, namely the solid first resin beam 333 far from the spraying group pushes the molten first resin beam 333 close to the nozzle into the nozzle to be extruded from one of the nozzles. The four groups of extruders and the auxiliary mechanism extrude simultaneously, four groups of molten resins are generated from the nozzle, and the carbon fiber tows 354 are drawn out by the friction force between the carbon fiber tows and the printing platform during the movement of the nozzle, so that the carbon fiber tows and the carbon fibers are subjected to in-situ impregnation in real time in the printing process, and the in-situ impregnation co-extrusion of the carbon fiber resins is realized.
The motion transmission principle of the rotating mechanism on the printing head is as follows: the rotation of the rotating motor 301 is transmitted to the rotating fixed connector 359 through the coupling 355, and the rotating fixed connector 359 is fixedly connected with the second connecting plate 305, so that the rotation of the second connecting plate 305 is realized.
As shown in FIG. 6, the feed end of the nozzle 325 is provided with one fiber feed port 41 and four resin feed ports 42; the fiber feeding holes 41 are located in the center, the four resin feeding holes 42 are uniformly arranged on the periphery of the fiber feeding holes 41, the edge of the feeding end of the nozzle is close to, and the distance between the four resin feeding holes and the fiber feeding holes is 15-25 mm. The nozzle 325 is provided with three heating module mounting holes 43 and one temperature control module mounting hole 44 for mounting a heating rod and a temperature sensor at a position between the fiber feed port 41 and the resin feed port 42.
As shown in fig. 7, the discharge end of the nozzle 325 is provided with a fiber discharge port 45 and four resin discharge ports 46, the four resin discharge ports 46 are uniformly arranged around the fiber discharge port 45, and the distance between the four resin discharge ports 46 and the fiber discharge port 45 is 0.2-2.5 mm.
The embodiments described above are intended to illustrate the technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, additions and equivalents made within the scope of the principles of the present invention should be included in the scope of the present invention.
Claims (6)
1. The in-situ additive manufacturing equipment for the continuous fiber reinforced high-performance resin composite material is characterized by comprising a support frame, a printing head and a printing hot bed;
the support frame comprises an upper support plate and a lower support plate fixed with the upper support plate through three support columns, each support column is provided with a sliding block capable of sliding up and down along the support column, and the sliding block is hinged with a support rod; the printing hot bed is fixed on the lower supporting plate;
the print head includes: the device comprises an upper connecting plate, a lower connecting plate connected with the upper connecting plate through a fixing column, four resin trays and a fiber tray which are arranged between the upper connecting plate and the lower connecting plate, a rotating mechanism fixed with the upper end face of the upper connecting plate, and a nozzle fixed with the lower end face of the lower connecting plate; the feeding end of the nozzle is provided with five feeding holes corresponding to four resin material trays and one fiber material tray respectively; the rotating mechanism is respectively hinged with one end of each of the three supporting rods;
the feeding end of the nozzle is provided with a fiber feeding hole and four resin feeding holes; the fiber feeding holes are located in the center, the four resin feeding holes are uniformly arranged on the periphery of the fiber feeding holes, and the distance between the four resin feeding holes and the fiber feeding holes is 15-25 mm; the nozzle is provided with a heating module and a temperature control module between the fiber feed port and the resin feed port; the discharge end of the nozzle is provided with a fiber discharge hole and four resin discharge holes, the four resin discharge holes are uniformly arranged around the fiber discharge hole, and the distance between the four resin discharge holes and the fiber discharge hole is 0.2-2.5 mm;
the rotary mechanism comprises: the output end of the rotating motor is connected with a rotating fixed connecting piece through a coupler, and the rotating fixed connecting piece is fixedly connected with the upper connecting plate; a first connecting plate is fixed below the motor connecting plate, and the first connecting plate is fixed with the upper end of the bearing fixing shell; a first bearing, a sliding ring and a second bearing are arranged in the bearing fixing shell; the inner ring of the first bearing is fixed on the sliding ring through an elastic washer; the inner ring of the second bearing is in interference fit with the rotary fixed connecting piece; and the bearing end cover is fixedly connected with the bearing fixing shell and used for fixing the outer ring of the second bearing.
2. The in-situ additive manufacturing apparatus for continuous fiber reinforced high performance resin composite material according to claim 1, wherein each supporting column comprises two parallel polished rods and a lead screw driven by a lead screw motor, the slide block is sleeved on the polished rods and the lead screw, and the lead screw is driven by the lead screw motor to rotate to drive the slide block to slide up and down along the polished rods.
3. The in-situ additive manufacturing equipment for the continuous fiber reinforced high-performance resin composite material as claimed in claim 1, wherein four extruders are fixed on the lower end surface of the lower connecting plate, the input ends of the four extruders are respectively in one-to-one correspondence with four resin trays, and the output ends of the four extruders are respectively connected with four resin feed ports of the nozzle.
4. The continuous fiber reinforced high-performance resin composite in-situ additive manufacturing equipment according to claim 3, wherein the extruder is connected with the resin feed port through a throat pipe, one end of the throat pipe is in threaded connection with the resin feed port, and the other end of the throat pipe is fixed with the output end of the extruder through a set screw; polytetrafluoroethylene tubes for resin materials and fiber materials to pass through are respectively arranged in the throat tube and the fiber feeding port.
5. The continuous fiber reinforced high-performance resin composite in-situ additive manufacturing equipment as claimed in claim 1, wherein at least two fixing columns are arranged between the upper connecting plate and the lower connecting plate, and at least one vertical rod is further arranged on the lower connecting plate; the fixed column and the vertical rod are both provided with horizontal support rods, and the resin material disc and the fiber material disc are rotatably sleeved on the corresponding horizontal support rods.
6. The continuous fiber reinforced high-performance resin composite in-situ additive manufacturing apparatus according to claim 1, wherein the fiber trays are arranged in the middle of four resin trays.
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| CN202110832015.4A CN113619106B (en) | 2021-07-22 | 2021-07-22 | Continuous fiber reinforced high-performance resin composite material in-situ additive manufacturing equipment |
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| CN202110832015.4A CN113619106B (en) | 2021-07-22 | 2021-07-22 | Continuous fiber reinforced high-performance resin composite material in-situ additive manufacturing equipment |
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| CN113619106B true CN113619106B (en) | 2022-03-25 |
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