CN112917946A - Forming device and method for ultra-thick continuous fiber reinforced thermoplastic resin prepreg - Google Patents
Forming device and method for ultra-thick continuous fiber reinforced thermoplastic resin prepreg Download PDFInfo
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- CN112917946A CN112917946A CN201911236770.5A CN201911236770A CN112917946A CN 112917946 A CN112917946 A CN 112917946A CN 201911236770 A CN201911236770 A CN 201911236770A CN 112917946 A CN112917946 A CN 112917946A
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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
- 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]
- B29C70/504—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] using rollers or pressure bands
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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
- 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
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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
- B29B15/14—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length of filaments or wires
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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
- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/10—Cords, strands or rovings, e.g. oriented cords, strands or rovings
- B29K2105/101—Oriented
- B29K2105/105—Oriented uni directionally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Reinforced Plastic Materials (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
In order to solve the problems of large volume and low forming efficiency of a forming device of the ultra-thick continuous fiber reinforced thermoplastic prepreg in the prior art, the invention provides a forming device and a forming method of the ultra-thick continuous fiber reinforced thermoplastic resin prepreg, wherein the forming device comprises an unreeling device, a yarn spreading device, an impregnation die head, a shaping roller, a traction roller and a reeling device; wherein, the upper die head and the lower die head are symmetrically arranged at two sides of the middle die head, and a plurality of pairs of impregnation ripples which are arranged in a staggered way and are matched with each other are arranged at the joint of the middle die head, the upper die head and the lower die head. The invention utilizes the double-layer impregnation structure of the single die head, simplifies the structure of the forming equipment in the prior art on the premise of ensuring that resin can fully penetrate glass fibers and fully impregnate, and realizes the aims of small occupied area and improvement of production efficiency.
Description
Technical Field
The invention belongs to the field of composite material preparation, and particularly relates to a device and a method for quickly forming an ultra-thick continuous fiber reinforced thermoplastic resin prepreg.
Background
When a composite material product is produced, such as a winding pipeline, the ultra-thick continuous fiber reinforced thermoplastic prepreg can reduce the laying, and has higher production efficiency. The thickness of the existing continuous fiber reinforced thermoplastic prepreg on the market is generally 0.20-0.50 mm, more glass fibers are needed for thicker reinforced thermoplastic prepreg (>0.5mm), and resin cannot well penetrate the glass fibers in a die head formed by one-step impregnation, so that a thick strip product is poorly presoaked, the porosity is high, the fiber and the resin cannot be fully impregnated, and the prepreg has the defects of thick strips, white yarns and the like.
In the prior art represented by Chinese patent application CN208148549, an upper discharge die head and a lower discharge die head are adopted to form a die head, and a thick strip manufactured by one-step forming has low performance which is lower than 400MPa and cannot be normally used.
In addition, as disclosed in CN201510070915, a first coating mechanism and a second coating mechanism are connected in parallel to produce a thick sheet in a symmetrical layout production line, which not only occupies a large area, but also has low production efficiency.
In a word, the existing molding device for the ultra-thick continuous fiber reinforced thermoplastic prepreg has large volume and low molding efficiency.
Disclosure of Invention
In order to solve the problems of large volume and low forming efficiency of a forming device of the ultra-thick continuous fiber reinforced thermoplastic prepreg in the prior art, the invention provides the forming device and the forming method of the ultra-thick continuous fiber reinforced thermoplastic resin prepreg, which can divide a large amount of raw material yarns required for producing the ultra-thick sheet into two parts for yarn spreading respectively and simultaneously impregnate the two impregnated surfaces in a die head, thereby reducing the volume of equipment and improving the production efficiency.
In order to achieve the purpose, the invention adopts the specific scheme that: the technical scheme is that the impregnation die head comprises a middle die head, an upper die head, a lower die head and a discharge runner which is arranged on the middle die head and is used for being connected with a resin extrusion device; wherein, the upper die head and the lower die head are symmetrically arranged at two sides of the middle die head, and a plurality of pairs of impregnation ripples which are arranged in a staggered way and are matched with each other are arranged at the joint of the middle die head and the upper die head and the lower die head.
The discharging flow channel is arranged close to the feeding end of the middle die head and comprises a feeding flow channel, an upper flow channel, a lower flow channel and a liquid storage tank; the feeding end of the feeding runner is connected with the resin extrusion device; the discharge end of the feeding runner is respectively and simultaneously connected with the feeding ends of the upper runner and the lower runner; the discharge ends of the upper flow channel and the lower flow channel are arranged at the bottom of the liquid storage tank.
Wherein, the positions of the upper die head and the lower die head corresponding to the discharging runner are provided with a reflux groove.
Wherein, the two ends of the middle die head, the upper die head and the lower die head are respectively provided with a flow-resisting convex group for preventing the resin from flowing out in a matching way; the flow-resisting convex group comprises flow-resisting bulges arranged at two ends of the middle die head and an upper flow-resisting recess and a lower flow-resisting recess which correspond to the flow-resisting bulges and are respectively arranged on the upper die head and the lower die head.
A method for molding an ultra-thick continuous fiber reinforced thermoplastic resin prepreg has the technical scheme that: the method comprises the following steps:
s1, after yarn is unwound by an unwinding device, continuous fibers are intensively drawn out and arranged;
s2, carrying out layered yarn spreading and heating on the fiber bundles subjected to yarn releasing and arrangement in the step S1 through a yarn spreading device; the fibers with the sizing agent are dispersed, so that the impregnation is convenient;
s3, respectively introducing the fibers subjected to double-layer yarn spreading in the step S2 into two closed impregnation surfaces formed by a middle die head, an upper die head and a lower die head;
s4, discharging high-temperature resin output by the resin extrusion device through a flow channel arranged on the middle die head, and bringing the high-temperature resin into two closed impregnation surfaces formed by the middle die head, the upper die head and the lower die head by fibers to realize impregnation;
and S5, shaping and cooling the molten sheet subjected to the double-layer impregnation in the step S4 to form a thick sheet by a shaping roller, and obtaining a finished product by using a winding device.
Has the advantages that: the invention is suitable for the production occasion of the molding of the super-thick continuous fiber reinforced thermoplastic resin prepreg, utilizes the single-die head double-layer impregnation structure to divide a large amount of raw material yarns required for producing super-thick sheets into two parts for spreading yarns respectively, and the two impregnation surfaces in one die head are impregnated simultaneously and respectively, so that on the premise of ensuring that the resin can fully penetrate through glass fibers and the impregnation is full, the structure of the molding equipment in the prior art is simplified through the two closed impregnation surfaces formed by the middle die head, the upper die head and the lower die head, and the aims of small occupied area and production efficiency improvement are achieved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 shows an embodiment of the present invention.
Fig. 3 is an enlarged view of fig. 2 at E.
Fig. 4 is another embodiment of the present invention.
Fig. 5 is an enlarged view of fig. 4 at F.
Fig. 6 is a block diagram of the components of the control assembly.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The invention aims to produce the ultra-thick continuous fiber reinforced thermoplastic prepreg with good impregnation effect, high strength performance and high production efficiency by adopting a simple and effective device. The equipment designed by the invention not only occupies small area and is simple and practical, but also the impregnation effect of the produced ultra-thick prepreg product is the same as that of the common thin prepreg; wherein the thickness of the super-thick continuous fiber is 0.4 mm-1 mm; the thickness of the thin prepreg is <0.5 mm.
As shown in fig. 1, in order to solve the problem of the excessive size of the forming device in the prior art, the forming device for the ultra-thick continuous fiber reinforced thermoplastic resin prepreg includes an unwinding device 1, a yarn spreading device 2 for dividing the raw material yarn output by the unwinding device 1 into two parts, an impregnation die head 3 for impregnating the raw material yarn output by the yarn spreading device 2, a shaping roller 4 for shaping the impregnated raw material yarn output by the impregnation die head 3, a traction roller 5 for providing traction force, and a winding device 6, and the volume of the device is reduced by ensuring that the two parts of raw material yarns output by the yarn spreading device 2 are simultaneously and synchronously impregnated.
As shown in fig. 2, the impregnation die 3 includes a middle die 302, an upper die 301, a lower die 303, and a discharge runner 304 provided on the middle die 302 for connection with the resin extrusion device 8; wherein, the upper die head 301 and the lower die head 303 are symmetrically arranged at the upper side and the lower side of the middle die head 302, and a plurality of pairs of impregnating ripples which are arranged in a staggered way and matched with each other are arranged at the joint of the middle die head 302 and the upper die head 301 and the lower die head 303; wherein, in order to guarantee the dipping effect and not to damage the raw yarn, the dipping corrugation is composed of concave-convex corrugation curves matched up and down.
Further, in order to ensure the heat-insulating effect and reduce the external interference, the impregnation die 3 is preferably configured in a closed structure.
Specific example I: as shown in fig. 3, the discharging flow channel 304 is disposed near the feeding end of the middle mold head 302, and the discharging flow channel 304 includes a feeding flow channel 3041, an upper flow channel 3042, and a lower flow channel 3043; wherein, the feeding end of the feeding runner 3041 is connected with the resin extrusion device 8; the discharge end of the feeding runner 3041 is connected to the feeding ends of the upper runner 3042 and the lower runner 3043, respectively.
In use, the resin output from the resin extrusion device 8 is extruded into the upper flow path 3042 and the lower flow path 3043 through the feeding flow path 3041, and flows into the two corrugated impregnation surfaces along the upper flow path 3042 and the lower flow path 3043, thereby coating the fibers.
In actual production, the discharge ends of the upper runner 3042 and the lower runner 3043 in the embodiment I directly contact with the raw material yarn, so that the raw material yarn is abraded, and the product performance is affected.
Specific example II: as shown in fig. 4-5, the discharging flow channel 304 is disposed near the feeding end of the middle mold head 302, and the discharging flow channel 304 includes a feeding flow channel 3041, an upper flow channel 3042, a lower flow channel 3043, and two liquid reservoirs 3044 symmetrically disposed at the feeding end of the middle mold head 302; wherein, the feeding end of the feeding runner 3041 is connected with the resin extrusion device 8; the discharge end of the feeding runner 3041 is connected to the feeding ends of the upper runner 3042 and the lower runner 3043, respectively; discharge ends of the upper flow path 3042 and the lower flow path 3043 are respectively provided at bottoms of two different liquid sumps 3044 for supplying the impregnating resin.
In use, the resin discharged from the resin extrusion device 8 fills the liquid sump 3044, and then the surface of the resin is higher than the surface of the liquid sump 3044 due to surface tension. Therefore, the raw yarn is covered with the resin when passing through. Since the raw material yarn is not in direct contact with the discharge ends of the upper flow path 3042 and the lower flow path 3043, the raw material yarn is protected.
In practical practice, the liquid sump 3044 is provided to improve the performance of the product, but if the resin extrusion device 8 outputs a large amount of resin, the resin may flow out from the gaps in the corrugated impregnation surface, resulting in unnecessary waste. The main factors that contribute to this problem are: on the corrugated impregnation surface formed by the middle die 302, the upper die 301, and the lower die 303, a concave-convex corrugated curve closest to the discharge flow path 304 influences the resin coverage. Such as points a and B in fig. 3.
After the raw yarn passes through the liquid storage groove 3044, it is covered with resin, and then its movement locus is changed from a linear movement due to the existence of the concave-convex wave curve to an arc movement, and at points a and B, the resin is partially blocked. As the raw material yarn moves and the discharge channel 304 continues to feed, it accumulates more and more at points a and B until it flows out of the gaps in the corrugated impregnation surface.
Specific example III: in order to solve the above problems, as shown in fig. 4 to 5, the positions of the upper die head 301 and the lower die head 303 corresponding to the discharging flow channel 304 are provided with a backflow groove 304A; the reflow tank 304A may collect the resin collected at points a and B, forming a stock space between the reflow tank 304A and the stock tank 3044. On the one hand, the problem of resin overflow can be alleviated. In addition, the dipping modes in embodiment I and embodiment II are changed from single-side dipping through the upper runner 3042 and the lower runner 3043 to double-side dipping through the reflux tank 304A and the liquid storage tank 3044, so that the dipping reliability is improved.
Specific example IV: as shown in fig. 4 to 5, in order to further solve the problem of resin overflow, flow-blocking convex groups for preventing resin from flowing out are respectively and cooperatively arranged at two ends of the middle die head 302, the upper die head 301 and the lower die head 303; the flow-blocking convex group comprises flow-blocking bulges 302A arranged at two ends of the middle die head 302 and an upper flow-blocking recess 301A and a lower flow-blocking recess 303A which correspond to the flow-blocking bulges 302A and are respectively arranged on the upper die head 301 and the lower die head 303.
It is to be understood that: the two flow blocking protrusions 302A respectively form a flow blocking structure with the upper flow blocking recess 301A and the lower flow blocking recess 303A. The primary function of the flow-impeding structure is to retard or prevent the resin from flowing out of the gaps in the corrugated impregnation face.
It is to be understood that: the impregnation corrugations, flow-impeding structures, recirculation tank 304A, and sump 3044 described herein are all comprised of smooth surfaces.
Specific example V: since the resin extrusion device 8 is generally continuously fed out at a constant speed during operation, incomplete impregnation may occur if the resin feeding is too low; if the output resin is too much, even if the structures such as the return tank 304A and the liquid tank 3044 are provided, there may be a problem that the resin flows out from the slit in the corrugated impregnation surface.
As shown in fig. 6, the molding device for the ultra-thick continuous fiber reinforced thermoplastic resin prepreg may further include a control component 7; the control component 7 comprises a control unit 701 and a data acquisition unit 702; the data acquisition unit 702 acquires the winding speed of the winding device 6, and the control unit 701 dynamically adjusts the speed of the resin output by the resin extrusion device 8 according to the winding speed, so as to prevent liquid leakage among the middle die head 302, the upper die head 301 and the lower die head 303.
Specifically, the control unit 701 may be a single chip microcomputer; the data acquisition unit 702 may be a speed sensor; the single chip microcomputer receives data of the speed sensor, compares the data with empirical data, and controls the output speed of the resin extrusion device 8 according to the comparison result so as to avoid incomplete impregnation or overflow.
A method for molding an ultra-thick continuous fiber reinforced thermoplastic resin prepreg has the technical scheme that: the method comprises the following steps:
s1, continuous fiber yarn releasing: the width of the continuous fiber reinforced thermoplastic resin prepreg is between 500mm and 2000mm, and the mass content of the fiber is between 40 percent and 75 percent; calculating the required fiber quantity according to the width, the thickness and the fiber content; the fiber yarn group is equally divided into an upper part and a lower part after being unreeled by the unreeling device 1, is transversely arranged and set, has a certain breadth, and is divided into an upper layer and a lower layer which are respectively led into the yarn spreading device 2;
s2, double-layer yarn spreading: leading the upper and lower layers of glass fiber yarns out of the yarn spreading device 2, heating and applying certain tension to spread the yarns, dispersing and spreading the fibers, and setting the yarn spreading temperature to be 150-250 ℃;
s3, dipping: the upper layer and the lower layer of glass fibers are respectively introduced into an impregnation die head 3 with two layers of corrugated impregnation surfaces, high-temperature resin output by a resin extrusion device 8 is discharged through a discharge runner arranged on a middle die head 302, and the high-temperature resin is brought into two closed impregnation surfaces formed by the middle die head 302, an upper die head 301 and a lower die head 303 by the fibers to realize impregnation; the temperature of the resin extrusion device 8 is set to be 170-300 ℃, and the temperature range of the impregnation die head 3 is 200-350 ℃;
s4, the fiber impregnation speed is 3m/min-50m/min, the molten sheet subjected to the double-layer impregnation in the step S4 is shaped and cooled into a thick sheet by a shaping roller 4, and a finished product is obtained by a winding device 6.
S5, a porosity testing method comprises the following steps:
where ρ istIs the theoretical density, pmIs the actual density.
Theoretical density
ρGFIs the fiber density, pppEta is the ash content of the sample, which is the resin density; actual density ρmAs measured by drainage.
The continuous fiber reinforced thermoplastic resin prepreg described herein is composed of fibers and a thermoplastic resin. The fiber comprises one or a mixture of more of carbon fiber, glass fiber and aramid fiber; the resin includes polyethylene, polypropylene, nylon, polycarbonate, other general-purpose resins or high-performance engineering plastics.
The preparation process table of different continuous fiber reinforced thermoplastic resin prepregs:
the invention adopts a single-die double-layer impregnation structure, divides a large amount of glass fiber yarns required for producing the ultra-thick sheet into two parts for spreading yarns respectively, and impregnates the two impregnation surfaces in an impregnation die head 3 respectively, thereby ensuring that resin can fully penetrate through glass fibers and the impregnation is full.
The invention has the advantages that:
1. a large amount of glass fiber yarns are divided into two parts for spreading yarns respectively, so that sufficient dispersion and heating are ensured;
2. a large amount of glass fiber yarns are divided into two parts to be respectively impregnated on two impregnation surfaces of one impregnation die head 3, so that the full impregnation of resin and fibers can be realized, and the performance of the ultra-thick prepreg sheet is ensured;
3. the dipping die head 3 is simple and practical, can produce ultra-thick sheets and has small occupied area;
4. the closed impregnation mode is little interfered by the external environment and the production is stable.
It should be understood that the directional descriptions herein are based on fig. 5.
It is to be understood that: the raw yarn described herein may be a glass yarn.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily change or replace the present invention within the technical scope of the present invention. Therefore, the protection scope of the present invention is subject to the protection scope of the claims.
Claims (7)
1. A molding device for an ultra-thick continuous fiber reinforced thermoplastic resin prepreg comprises an unreeling device (1), a yarn spreading device (2), an impregnation die head (3), a setting roller (4), a traction roller (5) and a reeling device (6), and the technical scheme is that the impregnation die head (3) comprises a middle die head (302), an upper die head (301), a lower die head (303) and a discharge runner (304) which is arranged on the middle die head (302) and is used for being connected with a resin extruding device (8);
wherein, the upper die head (301) and the lower die head (303) are symmetrically arranged at two sides of the middle die head (302), and a plurality of pairs of impregnation ripples which are arranged in a staggered way and are matched with each other are arranged at the joint of the middle die head (302) and the upper die head (301) and the lower die head (303).
2. The forming device of the ultra-thick continuous fiber reinforced thermoplastic resin prepreg according to claim 1, wherein the discharging runner (304) is arranged close to the feeding end of the middle die head (302), and the discharging runner (304) comprises a feeding runner (3041), an upper runner (3042), a lower runner (3043) and a liquid storage tank (3044);
wherein the feeding end of the feeding runner (3041) is connected with a resin extrusion device (8); the discharge end of the feeding runner (3041) is respectively connected with the feeding ends of the upper runner (3042) and the lower runner (3043) at the same time; the discharge ends of the upper flow passage (3042) and the lower flow passage (3043) are arranged at the bottom of the liquid storage tank (3044).
3. The device for molding the ultra-thick continuous fiber reinforced thermoplastic resin prepreg according to claim 1 or 2, wherein the upper die head (301) and the lower die head (303) are provided with a backflow groove (304A) at a position corresponding to the discharge runner (304).
4. The forming device of the ultra-thick continuous fiber reinforced thermoplastic resin prepreg according to claim 1 or 2, wherein two ends of the middle die head (302), the upper die head (301) and the lower die head (303) are respectively provided with a flow-resisting convex group for preventing the resin from flowing out in a matching manner;
the flow blocking convex group comprises flow blocking bulges (302A) arranged at two ends of a middle die head (302), and an upper flow blocking recess (301A) and a lower flow blocking recess (303A) which correspond to the flow blocking bulges (302A) and are respectively arranged on an upper die head (301) and a lower die head (303).
5. The device for molding the ultra-thick continuous fiber reinforced thermoplastic resin prepreg according to claim 1, further comprising a control component (7); the control assembly (7) comprises a control unit (701) and a data acquisition unit (702); the data acquisition unit (702) acquires the winding speed of the winding device (6), and the control unit (701) dynamically adjusts the resin output speed of the resin extrusion device (8) according to the winding speed to prevent leakage among the middle die head (302), the upper die head (301) and the lower die head (303).
6. A method for molding an ultra-thick continuous fiber reinforced thermoplastic resin prepreg has the technical scheme that: the method comprises the following steps:
s1, drawing out continuous fibers in a centralized manner after yarn is unwound by an unwinding device (1) and arranging the continuous fibers;
s2, the fiber bundles after yarn releasing and arrangement in the step S1 pass through a yarn spreading device (2) to be subjected to layered yarn spreading and heating; the fibers with the sizing agent are dispersed, so that the impregnation is convenient;
s3, respectively introducing the fibers subjected to double-layer yarn spreading in the step S2 into two closed impregnation surfaces formed by a middle die head (302), an upper die head (301) and a lower die head (303);
s4, discharging the high-temperature resin output by the resin extrusion device (8) through a flow channel arranged on the middle die head (302), and bringing the high-temperature resin into two closed impregnation surfaces formed by the middle die head (302), the upper die head (301) and the lower die head (303) by fibers to realize impregnation;
and S5, shaping and cooling the molten sheet subjected to the double-layer impregnation in the step S4 by a shaping roller (4) to form a thick sheet, and obtaining a finished product by a winding device (6).
7. The method for molding the ultra-thick continuous fiber reinforced thermoplastic resin prepreg according to claim 6, wherein the technical scheme is as follows: the continuous fiber reinforced thermoplastic resin prepreg comprises fibers and thermoplastic resin; wherein the fiber comprises one or more of carbon fiber, glass fiber and aramid fiber; the thermoplastic resin is polyethylene or polypropylene or nylon or polycarbonate or other general purpose resin or high performance engineering plastics.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911236770.5A CN112917946A (en) | 2019-12-05 | 2019-12-05 | Forming device and method for ultra-thick continuous fiber reinforced thermoplastic resin prepreg |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113334628A (en) * | 2021-06-28 | 2021-09-03 | 四川兴宇航科技有限公司 | Air-float type rolling continuous fiber prepreg production device |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113334628A (en) * | 2021-06-28 | 2021-09-03 | 四川兴宇航科技有限公司 | Air-float type rolling continuous fiber prepreg production device |
| CN113334628B (en) * | 2021-06-28 | 2023-08-01 | 四川省新万兴碳纤维复合材料有限公司 | Air-floating type rolling continuous fiber prepreg production device |
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