CN113334626A - Continuous carbon fiber reinforced PEEK prepreg production process and equipment - Google Patents
Continuous carbon fiber reinforced PEEK prepreg production process and equipment Download PDFInfo
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- CN113334626A CN113334626A CN202110698694.0A CN202110698694A CN113334626A CN 113334626 A CN113334626 A CN 113334626A CN 202110698694 A CN202110698694 A CN 202110698694A CN 113334626 A CN113334626 A CN 113334626A
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- 229920002530 polyetherether ketone Polymers 0.000 title claims abstract description 38
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 title claims abstract description 37
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- 238000004804 winding Methods 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 8
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- 239000011347 resin Substances 0.000 claims description 61
- 238000001125 extrusion Methods 0.000 claims description 24
- 239000011248 coating agent Substances 0.000 claims description 18
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
- B29B15/125—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex by dipping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/14—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length of filaments or wires
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Reinforced Plastic Materials (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a production process and equipment of a continuous carbon fiber reinforced PEEK prepreg, relates to the technical field of production of the continuous carbon fiber reinforced PEEK prepreg, and is mainly used for solving the problems that domestic production equipment and production process are immature and industrial production conditions are not available at present. The method comprises the following steps: firstly, threading and spreading yarns; secondly, removing the sizing agent; thirdly, gluing the two sides; fourth, gum dipping; fifthly, cooling; sixthly, detecting on line; and seventhly, rolling. The structure includes: the device comprises a creel, a guide roller set, a grate, a yarn spreading roller set, a high-temperature oven, a first gluing roller, a second gluing roller, a forming impregnation die, a cooling platform, an online weight measuring instrument, a traction roller set and a winding device. The invention provides a production process and equipment of a continuous carbon fiber reinforced PEEK prepreg.
Description
Technical Field
The invention relates to the technical field of continuous carbon fiber reinforced PEEK prepreg production, in particular to a production process and equipment of a continuous carbon fiber reinforced PEEK prepreg.
Background
The continuous carbon fiber reinforced PEEK prepreg has the advantages of good toughness, recyclability, short molding time, no need of refrigeration and the like compared with thermosetting prepregs, is more and more emphasized, has become a research hotspot of material research units of various countries in recent years, and is gradually popularized and applied in the fields of common civil goods, automobiles, rail traffic, ships, aerospace and the like.
However, although continuous carbon fiber reinforced PEEK prepregs have many advantages over thermoset prepregs, they also have some disadvantages-because the resin is too viscous and does not readily wet the fibers, making the production of continuous carbon fiber reinforced PEEK prepregs difficult. This is also the reason why only a few countries and units worldwide can mass-produce. At present, the process method for preparing the continuous carbon fiber reinforced PEEK prepreg at home and abroad mainly comprises 3 steps:
1. a thin film method: firstly, the thermoplastic resin is made into a film, and then the film and the carbon fiber are made into a prepreg through hot pressing by a double-steel belt press. The prepreg prepared by the method has stable appearance quality and physical and chemical properties. However, high performance thermoplastic resins are difficult and expensive to make into films of consistent quality. Moreover, the technology is currently mastered by a few units in a few countries all over the world, and production equipment and films of the technology are not sold to China.
2. The "slurry" method: firstly, preparing resin powder into suspension liquid- 'slurry', then adsorbing the resin powder on the surface of the fiber by the carbon fiber through the 'slurry', then volatilizing the auxiliary agent in the 'slurry' at high temperature, and finally combining the resin and the fiber in a resin molten state through rolling or other modes to form the prepreg. The method has the greatest advantage of solving the problem that the high-viscosity thermoplastic resin is difficult to wet the carbon fibers. However, its disadvantages are also evident-PEEK needs to be processed into very fine powder for use and PEEK is very difficult to process into powder, usually requiring grinding at sub-200 degrees, which results in a significant increase in raw material costs. In addition, various additives are required to be added in the process of preparing the slurry solution, and the additives are difficult to completely remove in the subsequent process flow, so that the performance of the subsequent composite material is influenced. Also, the "mud" concentration is not easily controlled, resulting in uneven resin content in the final prepreg and therefore not easy to produce continuously in large batches.
3. Powder spreading method: spreading the fiber, uniformly scattering resin powder on the fiber, heating and melting, and rolling or combining the resin and the fiber to form the prepreg. However, this method has high requirements not only for the powder application equipment but also for the uniformity of the particle size of the resin powder. This results in a significant increase in raw material costs. Meanwhile, since this method can only be used for single-sided dusting, it is not suitable for preparing a thick prepreg.
Generally speaking, the production of domestic continuous carbon fiber reinforced PEEK prepreg is still in the beginning stage, which is caused by the fact that the production equipment and the production process are immature and the industrial production conditions are not met. This results in the national need to provide substantially only laboratory grade samples, which is largely dependent on import.
Disclosure of Invention
The invention aims to provide a production process of a continuous carbon fiber reinforced PEEK prepreg, which can be used for finishing the industrial production of the continuous carbon fiber reinforced PEEK prepreg.
Another technical problem to be solved by the present invention is to provide an apparatus capable of implementing the above method.
The technical scheme for solving the former technical problem of the invention is as follows: a continuous carbon fiber reinforced PEEK prepreg production process comprises the following steps:
firstly, threading and yarn unfolding: leading out the carbon fiber from the creel, and enabling the carbon fiber to be spread to a required width and uniformly distributed after sequentially passing through the guide roller set, the grate and the yarn spreading roller set;
II, removing a sizing agent: sending the spread carbon fibers into a high-temperature oven with a tension roller set;
thirdly, double-sided gluing: coating glue on the upper and lower surfaces of the carbon fiber by using two sets of extruders, a cast film die and an extrusion die head in cooperation with a first gluing roller and a second gluing roller which are sequentially arranged along the feeding direction;
fourth, gum dipping: the carbon fiber after being coated with the glue is further soaked and shaped under the action of an S-shaped cavity with gradually reduced sectional area through a forming and dipping die to form a semi-finished prepreg;
fifthly, cooling: rapidly cooling and shaping the semi-finished prepreg through a cooling platform;
sixthly, online detection: performing online quality detection on the shaped prepreg by using an online weight measuring instrument, and timely adjusting the extrusion capacity of an extruder according to an online detection result until the unit area, the weight and the apparent mass of the prepreg meet the requirements to obtain a finished prepreg;
seventhly, rolling: and the finished prepreg passes through the traction roller set and then is wound by the winding device for standby.
As a further improvement of the present invention, the step three specifically includes the following steps:
s1, raising the temperature of the extruder, the casting film die, the first gluing roller and the second gluing roller to 380-400 ℃;
s2, adding the PEEK resin into an extruder, and continuously, uniformly and accurately extruding a certain amount of resin into a casting film die through the extruder to form a resin film;
s3, coating the resin film on the first and second rotating gluing rollers through an extrusion die head, and uniformly scraping the molten resin film on the surfaces of the first and second gluing rollers by using a scraper;
s4, coating resin and preliminarily immersing the resin on the surface of the carbon fiber through the synchronous motion of the first gluing roller, the second gluing roller and the carbon fiber;
and S5, using a separating blade to assist in stripping the resin and the carbon fibers which are about to leave the surfaces of the first gluing roller and the second gluing roller.
As a further improvement of the invention, the temperature in the high-temperature oven in the second step is 450-500 ℃.
As a further improvement of the invention, the temperature in the S-shaped cavity of the molding and dipping mold in the fourth step is 390-410 ℃.
As a further improvement of the invention, tap water is selected as the cooling medium of the cooling platform in the fifth step.
The technical scheme for solving the second technical problem of the invention is as follows: a continuous carbon fiber reinforced PEEK prepreg production device comprises a creel, a guide roller set, a grate, a yarn spreading roller set, a high-temperature oven, a first gluing roller, a second gluing roller, a forming impregnation die, a cooling platform, an online weight measuring instrument, a traction roller set and a winding device which are sequentially arranged along a feeding direction; the device comprises a first gluing roller, a second gluing roller, a high-temperature oven and a high-temperature oven, wherein the first gluing roller and the second gluing roller are sequentially arranged along the feeding direction, the roller surfaces are tangent, cast film dies with extrusion die heads facing the surfaces of the first gluing roller and the second gluing roller are arranged above the first gluing roller and below the second gluing roller, one side of each cast film die, which is close to the high-temperature oven, is also provided with a scraper for scraping off gluing, and the separation part of the first gluing roller and carbon fibers and the separation part of the second gluing roller and the carbon fibers are both provided with separation blades; an S-shaped cavity with gradually reduced sectional area along the feeding direction is arranged in the forming dipping die.
As a further improvement of the invention, the guide roller group comprises two guide rollers which are oppositely arranged up and down; the yarn spreading roller group comprises a plurality of yarn spreading rollers which are sequentially arranged along the feeding direction; the traction roller group comprises two traction rollers which are oppositely arranged up and down.
As a further improvement of the invention, the adjacent yarn spreading rollers are arranged in a staggered way up and down.
As a further improvement of the invention, a plurality of tension rollers which are sequentially arranged along the feeding direction are arranged in the high-temperature oven.
As a further improvement of the invention, the cross-sectional area of the inlet of the S-shaped cavity is 10-30% larger than that of the outlet.
Technical effects
Compared with the prior art, the continuous carbon fiber reinforced PEEK prepreg production process and equipment have the advantages that:
1. in the method, firstly, a plurality of carbon fibers come out of a creel and are extruded by a pair of guide rollers, and then are converged on the same plane to form a carbon fiber tow. A plurality of carbon fiber tows are carded by the grate and are uniformly distributed in the width direction. Then, the carbon fiber tows are spread by a spreading roller to be spread to a required width and distributed uniformly. The carbon fibers of the prepreg product can be uniformly distributed and have no gaps, and the carbon fibers can be unfolded to facilitate the next procedure for removing the sizing agent on the surfaces of the carbon fibers. And then, the spread carbon fiber enters a high-temperature oven with a tension roller, so that the sizing agent on the surface of the carbon fiber can be better removed through ablation. And (3) immediately gluing the carbon fibers after removing the surface sizing agent, namely gluing the upper and lower surfaces of the carbon fibers by using two sets of extruders, a cast film die and an extrusion die head in cooperation with a first gluing roller and a second gluing roller, wherein the gluing rollers are horizontally arranged in a left-right tangent manner. And the carbon fiber after being coated with the glue is further soaked and shaped under the action of an S-shaped cavity with the gradually reduced sectional area through a forming and dipping die. And the outlet gap at the rear end of the S-shaped cavity is the thickness of a prepreg product. The prepreg after gluing forms a continuous extrusion process in a forming and dipping die, so that the resin can fully soak the fibers, and meanwhile, the product can be shaped at the outlet to form a semi-finished prepreg. And finally, rapidly cooling and shaping the semi-finished prepreg through a cooling platform, and rolling the semi-finished prepreg through a traction roller and a rolling device for standby after the semi-finished prepreg is detected by an online weight measuring instrument.
According to the method, two sets of extruders, a cast film die and an extrusion die head are adopted, and the first gluing roller and the second gluing roller are matched to glue the upper surface and the lower surface of the carbon fiber, so that the gluing uniformity is facilitated, and the extruded molten resin film can be uniformly and stably coated on the surface of the carbon fiber. Meanwhile, the carbon fiber after being coated with the glue can be fully infiltrated by the high-viscosity thermoplastic resin and the carbon fiber under the action of the S-shaped cavity through the forming and impregnating die. Therefore, by using the method, the industrial production of the continuous carbon fiber reinforced PEEK prepreg can be completed.
2. Adding PEEK resin into an extruder, continuously, uniformly and accurately extruding a certain amount of resin into a casting film die through the extruder, and forming a resin film with a certain width and uniform and stable weight per unit area after the molten resin passes through the casting film die.
3. The resin film is coated on the first and second rotating gluing rollers through the extrusion die head, the molten resin film on the surfaces of the first and second gluing rollers can be uniformly scraped by using the scraper, and the resin coated on the first and second gluing rollers is combined with the fibers after being scraped, so that the gluing accuracy is facilitated. In this embodiment, the first gluing roller rotates counterclockwise, the second gluing roller rotates clockwise, and the rotation speed is consistent with the speed of the prepreg production line. At the same time, the weight of the resin per unit area is further controlled by the gap formed between the doctor blade and the roll.
4. Through the synchronous motion of first rubber coating roller, second rubber coating roller and carbon fiber, make resin coating and preliminary dip in the carbon fiber surface, simultaneously, along with the motion of carbon fiber and first rubber coating roller, second rubber coating roller, enable resin and carbon fiber and form backward extrusion on the roller surface to make partial resin can dip in the carbon fiber, and then reach partial preimpregnation effect. The resin and the carbon fiber form reverse extrusion on the surface of the roller, which is favorable for the resin to be immersed into the carbon fiber and lays a foundation for the final complete soaking.
5. The separation blade is used for assisting in stripping the carbon fibers which are about to leave the surfaces of the first gluing roller and the second gluing roller so as to ensure that the resin and the carbon fibers are transferred in time and completely and combined with the carbon fibers, so that gluing is uniform, stable and controllable.
The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of a process flow of the present invention;
FIG. 2 is a schematic view of the structure of the production apparatus of the present invention.
Wherein: 1-a creel; 2-a guide roll; 3-fine-toothed comb; 4-a yarn spreading roller; 5-high temperature oven; 6-a tension roller; 7-casting a film mould; 8-an extrusion die head; 9-a first gluing roller; 10-a scraper; 11-a separating blade; 12-forming an impregnation die; 13-S-shaped cavity; 14-a cooling platform; 15-online weight measuring instrument; 16-a pulling roll; 17-a winding device; 18-second glue roller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiments of the present invention will now be described with reference to the accompanying drawings.
Examples
As shown in FIG. 1, the invention discloses a continuous carbon fiber reinforced PEEK prepreg production process, which comprises the following steps:
firstly, threading and yarn unfolding: leading out carbon fibers from a creel 1, and enabling the carbon fibers to be spread to a required width and uniformly distributed through a guide roller set, a grate 3 and a yarn spreading roller set in sequence;
II, removing a sizing agent: sending the spread carbon fiber into a high-temperature oven 5 with a tension roller set;
thirdly, double-sided gluing: coating glue on the upper and lower surfaces of the carbon fiber by using two sets of extruders, a cast film die 7 and an extrusion die head 8 in cooperation with a first coating roller 9 and a second coating roller 18 which are sequentially arranged along the feeding direction;
fourth, gum dipping: the carbon fiber after being coated with the glue is further soaked and shaped under the action of an S-shaped cavity 13 with gradually reduced sectional area through a forming and dipping die 12 to form a semi-finished prepreg;
fifthly, cooling: the semi-finished prepreg is rapidly cooled and shaped through a cooling platform 14;
sixthly, online detection: performing online quality detection on the shaped prepreg by using an online weight measuring instrument 15, and timely adjusting the extrusion capacity of an extruder according to an online detection result until the unit area, the weight and the apparent mass of the prepreg meet the requirements to obtain a finished prepreg;
seventhly, rolling: finished prepreg passes through the traction roller set and then is wound by the winding device 17 for standby.
In the method, firstly, a plurality of carbon fibers come out of a creel 1 and are extruded by a pair of guide rollers 2 to be converged on the same plane to form a carbon fiber tow. A plurality of carbon fiber tows are carded by the grate 3 and are uniformly distributed in the width direction. Then, the carbon fiber tows are spread by the spreading roller 4 to be spread to a required width and distributed uniformly. The carbon fibers of the prepreg product can be uniformly distributed and have no gaps, and the carbon fibers can be unfolded to facilitate the next procedure for removing the sizing agent on the surfaces of the carbon fibers. And then, the spread carbon fiber enters a high-temperature oven 5 with a tension roller 6, and the sizing agent on the surface of the carbon fiber can be removed in an ablation manner. And (3) immediately gluing the carbon fiber after removing the surface sizing agent, namely gluing the upper and lower surfaces of the carbon fiber by using two sets of extruders, a cast film die 7 and an extrusion die head 8 in cooperation with a first gluing roller 9 and a second gluing roller 18, wherein the first gluing roller 9 and the second gluing roller 18 are horizontally arranged in a left-right tangent manner. The carbon fiber after being coated with the glue is further soaked and shaped under the action of an S-shaped cavity 13 with gradually reduced sectional area through a forming and dipping die 12. Wherein, the outlet gap at the rear end of the S-shaped cavity 13 is the thickness of a prepreg product. The prepreg thus coated forms a continuous extrusion process in the molding and dipping die 12, so that the resin can fully soak the fibers, and the product can be shaped at the outlet to form a semi-finished prepreg. And finally, rapidly cooling and shaping the semi-finished prepreg through a cooling platform 14, detecting the semi-finished prepreg through an online weight measuring instrument 15, and winding the semi-finished prepreg through a traction roller 16 and a winding device 17 for later use.
According to the method, two sets of extruders, a cast film die 7 and an extrusion die head 8 are adopted, and a first gluing roller 9 and a second gluing roller 18 are matched to glue the upper surface and the lower surface of the carbon fiber, so that the gluing uniformity is facilitated, and the extruded molten resin film can be uniformly and stably coated on the surface of the carbon fiber. Meanwhile, the carbon fiber after being coated with the glue can be fully infiltrated by the high-viscosity thermoplastic resin and the carbon fiber under the action of the S-shaped cavity 13 through the forming and dipping die 12. Therefore, by using the method, the industrial production of the continuous carbon fiber reinforced PEEK prepreg can be completed.
The third step specifically comprises the following steps:
s1, raising the temperature of the extruder, the casting film die 7, the first gluing roller 9 and the second gluing roller 18 to 380-400 ℃;
s2, adding the PEEK resin into an extruder, continuously, uniformly and accurately extruding a certain amount of resin into the casting film die 7 through the extruder, and forming a resin film with a certain width and uniform and stable weight per unit area after the molten resin passes through the casting film die 7;
s3, coating the resin film on the first glue coating roller 9 and the second glue coating roller 18 which rotate through the extrusion die head 8, uniformly scraping the molten resin film on the surfaces of the first glue coating roller 9 and the second glue coating roller 18 by using the scraper 10, and combining the resin coated on the first glue coating roller 9 and the second glue coating roller 18 with the fibers after being scraped, so that the glue coating accuracy is facilitated. In this embodiment, the first glue roller 9 rotates counterclockwise, and the second glue roller 18 rotates clockwise at a speed consistent with the speed of the prepreg production line. Meanwhile, the weight of the resin in unit area can be further controlled through gaps formed between the scraper 10 and the first gluing roller 9 and the second gluing roller 18;
s4, coating resin and preliminarily immersing the resin into the surface of the carbon fiber through the synchronous movement of the first gluing roller 9, the second gluing roller 18 and the carbon fiber, and simultaneously, forming backward extrusion on the resin and the carbon fiber on the surfaces of the first gluing roller 9 and the second gluing roller 18 along with the movement of the carbon fiber, the first gluing roller 9 and the second gluing roller 18, so that part of the resin can be immersed into the carbon fiber, and further, part of the preimpregnation effect is achieved. The resin and the carbon fiber form reverse extrusion on the surfaces of the first gluing roller 9 and the second gluing roller 18, so that the resin can be immersed into the carbon fiber, and a foundation is laid for final complete soaking;
s5, the separating blade 11 is used for assisting in stripping the carbon fibers which are about to leave the surfaces of the first gluing roller 9 and the second gluing roller 18 so as to ensure that the resin and the carbon fibers are transferred in time and completely, and therefore gluing is uniform, stable and controllable.
In this embodiment, the temperature in the high temperature oven 5 in the second step is 450 ℃ to 500 ℃. The temperature in the S-shaped cavity 13 of the molding and dipping die 12 in the fourth step is 390-410 ℃. Tap water is used as the cooling medium of the cooling platform 14 in the fifth step, because the melting point of PEEK resin is about 343 ℃, and ordinary tap water circulation cooling is enough.
The invention relates to production equipment, and as shown in fig. 2, the invention discloses continuous carbon fiber reinforced PEEK prepreg production equipment which comprises a creel 1, a guide roller set, a grate 3, a spreading roller set, a high-temperature oven 5, a first gluing roller 9, a second gluing roller 18, a forming and impregnating mold 12, a cooling platform 14, an online weight measuring instrument 15, a traction roller set and a winding device 17 which are sequentially arranged along the feeding direction. The first gluing roller 9 and the second gluing roller 18 are sequentially arranged along the feeding direction, the roller surfaces are tangent, and cast film dies 7 with extrusion die heads 8 facing the surfaces of the first gluing roller 9 and the second gluing roller 18 are arranged above the first gluing roller 9 and below the second gluing roller 18. A scraper 10 for scraping off the glue is further arranged on one side, close to the high-temperature oven 5, of the cast film die 7, and separating blades 11 are arranged at the separation position of the first gluing roller 9 and the carbon fiber and the separation position of the second gluing roller 18 and the carbon fiber. An S-shaped cavity 13 with gradually reduced sectional area along the feeding direction is arranged in the molding and dipping die 12.
In this embodiment, the guide roller group includes two guide rollers 2 disposed opposite to each other in the up-down direction. The yarn spreading roller group comprises a plurality of yarn spreading rollers 4 which are sequentially arranged along the feeding direction. The set of drawing rolls comprises two drawing rolls 16 arranged opposite one another. Wherein, adjacent yarn-spreading rollers 4 are arranged in a staggered way up and down.
Meanwhile, a plurality of tension rollers 6 which are sequentially arranged along the feeding direction are arranged in the high-temperature oven 5.
In addition, the sectional area of the inlet of the S-shaped cavity 13 is 10-30% larger than that of the outlet.
The present invention has been described in connection with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, and is intended to cover various modifications, equivalent combinations, which are made in accordance with the spirit of the present invention.
Claims (10)
1. A continuous carbon fiber reinforced PEEK prepreg production process is characterized by comprising the following steps:
firstly, threading and yarn unfolding: leading out carbon fibers from a creel (1), and enabling the carbon fibers to be spread to a required width and uniformly distributed through a guide roller set, a grate (3) and a yarn spreading roller set in sequence;
II, removing a sizing agent: sending the spread carbon fiber into a high-temperature oven (5) with a tension roller set;
thirdly, double-sided gluing: gluing the upper surface and the lower surface of the carbon fiber by using two sets of extruders, a cast film die (7) and an extrusion die head (8) in cooperation with a first gluing roller (9) and a second gluing roller (18) which are sequentially arranged along the feeding direction;
fourth, gum dipping: the carbon fiber after being glued is further soaked and shaped under the action of an S-shaped cavity (13) with gradually reduced sectional area through a forming and dipping die (12) to form a semi-finished prepreg;
fifthly, cooling: the semi-finished prepreg is rapidly cooled and shaped through a cooling platform (14);
sixthly, online detection: performing online quality detection on the shaped prepreg by using an online weight measuring instrument (15), and timely adjusting the extrusion capacity of an extruder according to an online detection result until the weight of the prepreg in unit area and the apparent mass meet the requirements, so as to obtain a finished prepreg;
seventhly, rolling: and the finished prepreg passes through the traction roller set and then is wound by the winding device (17) for standby.
2. The continuous carbon fiber reinforced PEEK prepreg production process according to claim 1, wherein the third step specifically comprises the following steps:
s1, raising the temperature of the extruder, the casting film die (7), the first gluing roller (9) and the second gluing roller (18) to 380-400 ℃;
s2, adding the PEEK resin into an extruder, and continuously, uniformly and accurately extruding a certain amount of resin into a casting film die (7) through the extruder to form a resin film;
s3, coating a resin film on a first rotating gluing roller (9) and a second rotating gluing roller (18) through an extrusion die head (8), and uniformly scraping the molten resin film on the surfaces of the first gluing roller (9) and the second gluing roller (18) by using a scraper (10);
s4, coating resin and preliminarily immersing the resin on the surface of the carbon fiber through the synchronous movement of the first gluing roller (9) and the second gluing roller (18) and the carbon fiber;
and S5, using a separation blade (11) to assist in peeling off the resin and the carbon fibers which are about to leave the surfaces of the first gluing roller (9) and the second gluing roller (18).
3. The process for producing continuous carbon fiber reinforced PEEK prepreg according to claim 1 or 2, wherein the temperature in the high temperature oven (5) in step two is 450-500 ℃.
4. The continuous carbon fiber reinforced PEEK prepreg production process according to claim 1 or 2, wherein the temperature in the S-shaped cavity (13) of the forming and impregnating mold (12) in the fourth step is 390-410 ℃.
5. The continuous carbon fiber reinforced PEEK prepreg production process according to claim 1 or 2, wherein a cooling medium of the cooling platform (14) in the fifth step is tap water.
6. A continuous carbon fiber reinforced PEEK prepreg production device is characterized by comprising a creel (1), a guide roller set, a grate (3), a yarn spreading roller set, a high-temperature oven (5), a first gluing roller (9), a second gluing roller (18), a forming impregnation die (12), a cooling platform (14), an online weight measuring instrument (15), a traction roller set and a winding device (17) which are sequentially arranged along the feeding direction; the device comprises a first gluing roller (9), a second gluing roller (18), a cast film die (7) with an extrusion die head (8) facing the surface of the first gluing roller (9) and the second gluing roller (18), a scraper (10) for scraping resin is arranged on one side of the cast film die (7) close to a high-temperature oven (5), and a separation blade (11) is arranged at the separation position of the first gluing roller (9) and carbon fibers and the separation position of the second gluing roller (18) and the carbon fibers; an S-shaped cavity (13) with the sectional area gradually reduced along the feeding direction is arranged in the forming dipping die (12).
7. The continuous carbon fiber reinforced PEEK prepreg production device according to claim 6, wherein the guide roller group comprises two guide rollers (2) arranged oppositely up and down; the yarn spreading roller group comprises a plurality of yarn spreading rollers (4) which are sequentially arranged along the feeding direction; the drawing roller group comprises two drawing rollers (16) which are oppositely arranged up and down.
8. The continuous carbon fiber reinforced PEEK prepreg production device according to claim 7, wherein the adjacent yarn spreading rollers (4) are arranged in a staggered manner from top to bottom.
9. The continuous carbon fiber reinforced PEEK prepreg production device according to claim 6, 7 or 8, wherein a plurality of tension rollers (6) are arranged in the high-temperature oven (5) in sequence along the feeding direction.
10. The continuous carbon fiber reinforced PEEK prepreg production equipment as claimed in claim 6, wherein the cross-sectional area of the inlet of the S-shaped cavity (13) is 10% -30% larger than that of the outlet.
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Effective date of registration: 20220510 Address after: 614100 group 9, Xinghe village, Xinchang Town, Jiajiang County, Leshan City, Sichuan Province Applicant after: SICHUAN XIN WAN XING CARBON FIBER COMPOSITES Co.,Ltd. Address before: 614100 floor 1, building 2, group 4, Wansong village, Huangtu Town, Jiajiang County, Leshan City, Sichuan Province Applicant before: Sichuan Xinghang Aerospace Technology Co.,Ltd. |
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Application publication date: 20210903 |