CN211138191U - Forming device of super-thick continuous fiber reinforced thermoplastic resin prepreg - Google Patents
Forming device of super-thick continuous fiber reinforced thermoplastic resin prepreg Download PDFInfo
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- CN211138191U CN211138191U CN201922166544.6U CN201922166544U CN211138191U CN 211138191 U CN211138191 U CN 211138191U CN 201922166544 U CN201922166544 U CN 201922166544U CN 211138191 U CN211138191 U CN 211138191U
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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 resin prepreg in the prior art, the utility model provides a forming device of the ultra-thick continuous fiber reinforced thermoplastic resin prepreg, which comprises an unreeling device, a yarn spreading device, an impregnation die head, a shaping roller, a traction roller and a reeling device, and the technical proposal 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 extruding 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 utility model discloses utilize the double-deck impregnated structure of single die head, guaranteed that resin can be abundant pierce through fine, under the abundant prerequisite of flooding, simplify prior art the former's structure, realized that area is little, promote production efficiency's target.
Description
Technical Field
The utility model belongs to combined material preparation field, concretely relates to quick forming device of super thick continuous fibers reinforcing thermoplastic resin preimpregnation material.
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.
SUMMERY OF THE UTILITY MODEL
In order to solve among the prior art problem that the forming device of preimpregnation material is bulky, shaping inefficiency is moulded to super thick continuous fibers reinforcing heat, the utility model provides a forming device of preimpregnation material can fall into two parts with the required a large amount of raw materials yarn of production super thick sheet and carry out the exhibition yarn respectively to impregnate simultaneously in two flooding planes in a die head, reduced equipment volume, promoted production efficiency.
In order to achieve the above object, the utility model discloses a concrete scheme does: 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.
Has the advantages that: the utility model is suitable for a fashioned production occasion of super thick continuous fibers reinforcing thermoplastic resin preimpregnation material utilizes the double-deck impregnated structure of single mode head, falls into two parts to the required a large amount of raw materials yarn of production super thick sheet and opens up the yarn respectively to impregnate respectively in two impregnated surfaces in a die head simultaneously, guaranteed that resin can be abundant pierce through fine, under the abundant prerequisite of flooding, through two confined impregnated surfaces that well die head, upper die head, lower die head constitute, simplify among the prior art former's structure, realized that area is little, promote production efficiency's target.
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 shows 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 utility model aims at adopting simple and effective device to produce the super-thick continuous fiber reinforced thermoplastic prepreg with good dipping effect, high strength performance and high production efficiency. The equipment designed by the utility model 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.
The specific use principle of the molding device for the ultra-thick continuous fiber reinforced thermoplastic resin prepreg 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, pppη is the resin density, which is the ash content of the sample, and the 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 utility model discloses a double-deck flooding structure of single mode head falls into the fine yarn of a large amount of glass that the production super thick sheet is required two parts and opens up the yarn respectively to impregnate respectively in two flooding faces in a flooding die head 3, guaranteed that resin can be abundant pierce through fine, the flooding is abundant.
The utility model 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 the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily change or replace 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 (5)
1. A forming 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 is characterized in 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 apparatus for forming an ultra-thick continuous fiber reinforced thermoplastic resin prepreg according to claim 1, wherein the discharging runner (304) is disposed near a 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 sump (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 forming device of 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 apparatus for molding an ultra-thick continuous fiber-reinforced thermoplastic resin prepreg according to claim 1, further comprising a control unit (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).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922166544.6U CN211138191U (en) | 2019-12-05 | 2019-12-05 | Forming device of super-thick continuous fiber reinforced thermoplastic resin prepreg |
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| CN201922166544.6U CN211138191U (en) | 2019-12-05 | 2019-12-05 | Forming device of super-thick continuous fiber reinforced thermoplastic resin prepreg |
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| CN211138191U true CN211138191U (en) | 2020-07-31 |
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| CN201922166544.6U Active CN211138191U (en) | 2019-12-05 | 2019-12-05 | Forming device of super-thick continuous fiber reinforced thermoplastic resin prepreg |
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