CN114770978B - Device and method for preparing composite material rib by using thermoplastic fiber reinforced resin-based prepreg tape - Google Patents
Device and method for preparing composite material rib by using thermoplastic fiber reinforced resin-based prepreg tape Download PDFInfo
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- CN114770978B CN114770978B CN202210395691.4A CN202210395691A CN114770978B CN 114770978 B CN114770978 B CN 114770978B CN 202210395691 A CN202210395691 A CN 202210395691A CN 114770978 B CN114770978 B CN 114770978B
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- 239000002131 composite material Substances 0.000 title claims abstract description 74
- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 74
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 74
- 239000000835 fiber Substances 0.000 title claims abstract description 54
- 229920005989 resin Polymers 0.000 title claims abstract description 49
- 239000011347 resin Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007493 shaping process Methods 0.000 claims abstract description 81
- 238000010438 heat treatment Methods 0.000 claims description 20
- 229920005992 thermoplastic resin Polymers 0.000 claims description 18
- 229920002292 Nylon 6 Polymers 0.000 claims description 12
- 239000004743 Polypropylene Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 229920001155 polypropylene Polymers 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 229920000299 Nylon 12 Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 239000012783 reinforcing fiber Substances 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 16
- 238000005470 impregnation Methods 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 description 13
- 238000000748 compression moulding Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 229920001187 thermosetting polymer Polymers 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 210000002435 tendon Anatomy 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000011199 continuous fiber reinforced thermoplastic Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 239000003733 fiber-reinforced composite Substances 0.000 description 1
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- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
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Classifications
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention provides a device and a method for preparing a composite material rib by using a thermoplastic fiber reinforced resin-based prepreg tape, and belongs to the technical field of preparation of composite material ribs. Solves the problems of high porosity and low impregnation degree faced by the current preparation of fiber reinforced thermoplastic composite material ribs. It includes top cap and kerve, the top cap divide into top cap guide area and top cap shaping district, the top cap shaping district is the protruding platform that sets up at the right-hand member of the lower surface of top cap, the kerve divide into kerve guide area and kerve shaping district, the kerve shaping district is the concave platform that sets up at the right-hand member of the upper surface of kerve, be equipped with a plurality of rectangular form recess bases respectively in top cap guide area and kerve guide area, set up a guide roll in every rectangular form recess base, guide roll and rectangular form recess base pass through a plurality of fixing bolt and top cap or kerve fixed connection that corresponds, guide roll on the top cap and the guide roll one-to-one dislocation arrangement on the kerve. The prepared product has low porosity and good dimensional stability.
Description
Technical Field
The invention belongs to the technical field of preparation of fiber reinforced thermoplastic composite material ribs in civil engineering, and particularly relates to a device and a method for preparing a composite material rib by using a thermoplastic fiber reinforced resin-based prepreg tape.
Background
The structural materials used in ocean engineering are mainly steel materials, but in a complex service environment, the steel materials are easy to erode by chemical corrosion, microbial corrosion, physical corrosion and the like, so that the bearing capacity of the steel materials is seriously reduced, the structure is damaged, and the service life is reduced. The fiber reinforced composite material (Fiber reinforced polymer, FRP for short) has the characteristics of light weight, high strength and corrosion resistance, and is expected to realize the high performance and long service life of the ocean engineering structure by being applied to ocean engineering instead of reinforcing steel bars.
At present, FRP bars in the market mainly adopt thermosetting property, and a resin matrix (such as epoxy resin) of the FRP bars has the advantages of high rigidity, high hardness, good product dimensional stability and the like. However, the thermosetting resin molecular chain is in a three-dimensional network structure, so that the thermosetting resin molecular chain has high brittleness and poor impact resistance; in addition, thermosetting resins are prone to water absorption and hydrolysis and have poor corrosion resistance. In contrast, the thermoplastic resin molecular chain is in a planar linear structure, so that the thermoplastic resin molecular chain has good toughness; in addition, the thermoplastic resin is heated, melted, cooled and solidified only in a physical process, so that the production efficiency is high, and the waste material can be processed secondarily. The advantages make the thermoplastic composite material more suitable for replacing steel materials in ocean engineering structures, for example, thermoplastic composite material bars are used for replacing longitudinal stress bars and horizontal stirrups in concrete structures, so that the durability and economy of the material in the service process and the safety and environmental protection of the ocean engineering structures are improved.
At present, raw materials used in the preparation process of the continuous fiber reinforced thermoplastic composite material mainly comprise fiber bundles and prepreg tapes. Pultrusion is a molding process for preparing composite products by using fiber bundles, which refers to a method for preparing composite materials by impregnating continuous fibers with resin and passing the continuous fibers through a molding die under the action of a traction device. However, the viscosity of the thermoplastic resin is 100-1000 times that of the thermosetting resin, and it is very difficult to uniformly impregnate the fibers with the high-viscosity thermoplastic resin. In contrast, the lamellar prepreg tape resin can be uniformly impregnated into the fiber bundles, and the composite material product prepared by the prepreg tape has the characteristics of low porosity and high impregnation degree. The process for preparing the composite material by using the thermoplastic prepreg tape mainly comprises compression molding and winding molding. Compression molding (also called compression molding or compression molding) is a process in which a blank to be molded is placed in a mold cavity at a molding temperature, and then closed and pressurized to be molded and cured. However, the composite material ribs with smaller cross-sectional dimensions are not suitable for compression molding; in addition, the molding method has longer molding period, low efficiency, complex mold manufacturing and larger investment. Winding and forming, namely winding continuous fibers (or cloth belts and presoaked yarns) impregnated with resin onto a core mold according to a certain rule, and then solidifying and demolding to obtain the product. However, the fibers in the product obtained by the molding process are not distributed along the longitudinal direction of the product, and are not suitable for preparing composite material ribs.
Aiming at the problems, a preparation device and a preparation method of the fiber reinforced thermoplastic composite bar, which have high production efficiency, low cost, simple operation and wide application range, are needed to be provided.
Disclosure of Invention
In view of the above, the invention aims to provide a device and a method for preparing a composite material rib by using a thermoplastic fiber reinforced resin-based prepreg tape, so as to solve the problems of high porosity and low impregnation degree in the preparation of the current fiber reinforced thermoplastic composite material rib.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the device for preparing the composite material ribs by using the thermoplastic fiber reinforced resin-based prepreg tape comprises a top cover and a bottom groove, wherein the top cover is divided into a top cover guide area and a top cover shaping area, the top cover shaping area is a raised platform arranged at the right end of the lower surface of the top cover, the bottom groove is divided into a bottom groove guide area and a bottom groove shaping area, the bottom groove shaping area is a recessed platform arranged at the right end of the upper surface of the bottom groove, a plurality of strip-shaped groove bases are respectively arranged in the top cover guide area and the bottom groove guide area, a guide roller is arranged in each strip-shaped groove base, the guide roller and the strip-shaped groove base are fixedly connected with the corresponding top cover or bottom groove through a plurality of fixing bolts, and the guide rollers on the top cover and the guide rollers on the bottom groove are arranged in a one-to-one staggered manner;
a half-shape adjusting hole and a half-shape hole are respectively formed in the protruding platform and the recessed platform, the left end of the half-shape hole is communicated with the right end of the corresponding half-shape adjusting hole, the left end penetrates through the right end face of the corresponding platform, one ends, close to the left end of the half-shape adjusting hole, of the guide rollers of the top cover guide area and the guide rollers of the bottom groove guide area are of a necking structure, the left end of the half-shape adjusting hole is communicated with the necking structure formed by the corresponding guide rollers, the left end of the bottom groove is a feed inlet, and a plurality of heating rollers uniformly penetrate through the inside of the bottom groove and the inside of the top cover;
when the top cover is attached to the bottom groove, a plurality of guide rollers on the top cover and a plurality of guide rollers on the bottom groove are matched to form a fold-line-shaped guide roller set, the guide rollers of the fold-line-shaped guide roller set are arranged at equal intervals, the raised platform and the recessed platform enclose a complete shape adjusting hole and a complete shaping hole, the thermoplastic fiber reinforced resin-based prepreg tape is pulled by the traction device to enter the device from a feed inlet at the left end of the bottom groove, and the composite material rib shaping is realized after the folding-line-shaped guide roller set, the complete shape adjusting hole and the complete shaping hole are sequentially passed through.
Further, the thermoplastic resin matrix of the thermoplastic fiber reinforced resin-based prepreg tape is nylon 6, nylon 12 or polypropylene, and the reinforcing fibers are continuous carbon fibers or continuous glass fibers.
Further, the half-shape adjusting holes and the half-shape holes are positioned at the middle positions of the corresponding platforms.
Furthermore, the number of the guide rollers of the fold-line-shaped guide roller group is not less than 7, the guide rollers positioned in the middle are linear guide rollers, the guide rollers on the two sides are arranged at the center of the top cover and gather towards the whole shape adjusting hole in a fold line shape, the bending positions of the guide rollers on the two sides are distributed at two thirds of the length of the guide rollers from the feeding hole to the shaping hole, the distance between every two adjacent guide rollers near one end of the feeding hole is greater than or equal to the diameter of one guide roller and less than the diameter of two guide rollers, and the distance between every two adjacent guide rollers near one end of the whole shape adjusting hole is 5-10mm.
Furthermore, a semicircular groove is formed in the strip-shaped groove base, the guide roller is arranged in the semicircular groove, the height range of the strip-shaped groove base is 20-30mm, and the diameter range of the guide roller is 16-24mm.
Further, the fixing bolts are arranged along the length direction of the guide roller, the number of the fixing bolts is not less than 4, and the diameter range is 12-16mm.
Furthermore, the cross section of one end of the complete shape adjusting hole, which is communicated with the necking of the guide roller set, is elliptical, the length of the major axis of the ellipse is larger than the necking size of the guide roller set, the length of the minor axis of the ellipse is larger than the diameter of the guide roller, the cross section of one end of the complete shape adjusting hole, which is communicated with the complete shaping hole, is circular, and the diameter of the circular is the same as the diameter of the shaping hole and is the diameter of the prepared composite material rib.
Further, the height of the long-strip-shaped groove base of the top cover guide area and the diameter of the guide roller of the bottom groove guide area are the same.
Another object of the present invention is to provide a method for preparing a composite bar by using a device for preparing a composite bar by using a thermoplastic fiber reinforced resin-based prepreg tape, which specifically includes the following steps:
step 1) preheating: firstly, buckling the top cover and the bottom groove, and adjusting the temperature of a heating roller on the top cover and the bottom groove to be higher than the melting temperature of the thermoplastic resin;
step 2) prepreg tape mold penetrating: lifting the top cover, enabling the thermoplastic prepreg tape to sequentially pass through a feed inlet, a guide roller, a half-shape adjusting hole and a half-shape hole on the bottom groove, then matching the top cover with the bottom groove again, and changing the sheet-shaped thermoplastic prepreg tape into a thermoplastic prepreg tape with a wave-shaped section under the action of a broken line-shaped guide roller set under the action of the gravity of the top cover;
step 3) shaping and cooling: drawing the thermoplastic prepreg tape to finish shaping through the complete shape adjusting holes and the complete shaping holes to form composite material ribs, drawing the complete shaping holes, and cooling at room temperature;
step 4) cutting: the formed composite bar is cut to the desired length.
Further, in the step 1), the temperature of the heating rollers penetrating through the top cover and the bottom groove is adjusted to be 5-10 ℃ higher than the melting temperature of the thermoplastic resin.
Compared with the prior art, the device and the method for preparing the composite material rib by using the thermoplastic fiber reinforced resin-based prepreg tape have the beneficial effects that:
(1) The invention aims at the existing mature technology for preparing the prepreg tape and the good performance of the prepreg tape as the basis, the thermoplastic fiber reinforced resin-based prepreg tape can be prepared into a composite material rib by the device of the invention, and a brand new mode is provided for preparing the composite material rib!
(2) The cross section shape of the lamellar thermoplastic fiber reinforced resin-based prepreg tape is changed into a wavy shape under the action of the broken line-shaped guide roller, and the distance between adjacent wave crests and wave troughs is gradually reduced; under the action of the shape adjusting holes, the cross section shape of the wavy thermoplastic prepreg tape is changed into a round shape, and finally the shaping is finished through the shaping holes; the device prepares the prepreg tape into the composite material rib through the three stages, so that the cross section of the prepreg tape gradually contracts to be round, and the rib prepared by the device has low porosity and good dimensional stability.
(3) The device for preparing the composite material rib by using the thermoplastic fiber reinforced resin-based prepreg tape is simple in design, convenient to process, low in cost, capable of continuous production, high in production efficiency and strong in applicability.
(4) The device for preparing the composite material rib by using the thermoplastic fiber reinforced resin-based prepreg tape has the advantages of low porosity and good dimensional stability, and can effectively solve the problems of high porosity, low impregnation degree and the like in the preparation of the conventional fiber reinforced thermoplastic composite material rib.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic structural diagram of an apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin-based prepreg tape according to an embodiment of the present invention;
FIG. 2 is an isometric view of a top cover of an apparatus for preparing a composite bar from thermoplastic fiber reinforced resin-based prepreg tape according to an embodiment of the present invention;
FIG. 3 is a front view of a top cover of an apparatus for preparing composite tendons from thermoplastic fiber reinforced resin-based prepreg tapes according to an embodiment of the present invention;
FIG. 4 is a top view of a top cover of an apparatus for preparing composite tendons from thermoplastic fiber reinforced resin-based prepreg tapes according to an embodiment of the present invention;
FIG. 5 is a top cover side view of an apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape according to an embodiment of the present invention;
FIG. 6 is an isometric view of a bottom groove of an apparatus for preparing a composite bar from a thermoplastic fiber reinforced resin-based prepreg tape according to an embodiment of the present invention;
FIG. 7 is a front view of a bottom channel of an apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape according to an embodiment of the present invention;
FIG. 8 is a top view of a bottom channel of an apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape according to an embodiment of the present invention;
fig. 9 is a side view of a bottom groove of an apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape according to an embodiment of the present invention.
Reference numerals illustrate:
1. a top cover; 2. a bottom groove; 3. a guide roller; 4. a long-strip-shaped groove base; 5. a fixing bolt; 6. a feed inlet; 7. a top cover half-shape adjusting hole; 8. a top cap semi-shaped aperture; 9. a heating roller; 10. a raised platform; 11. a recessed platform; 12. half-shape adjusting holes of the bottom groove; 13. the bottom groove is a semi-shaped hole.
Detailed Description
The technical solutions 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. It should be noted that, in the case of no conflict, embodiments of the present invention and features of the embodiments may be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1-9, a device for preparing a composite material rib by using a thermoplastic fiber reinforced resin-based prepreg tape comprises a top cover 1 and a bottom groove 2, wherein the top cover 1 is divided into a top cover guide area and a top cover shaping area, the top cover shaping area is a raised platform 10 arranged at the right end of the lower surface of the top cover 1, the bottom groove 2 is divided into a bottom groove guide area and a bottom groove shaping area, the bottom groove shaping area is a recessed platform 11 arranged at the right end of the upper surface of the bottom groove 2, a plurality of strip-shaped groove bases 4 are respectively arranged in the top cover guide area and the bottom groove guide area, a guide roller 3 is arranged in each strip-shaped groove base 4, the guide roller 3 and the strip-shaped groove base 4 are fixedly connected with the corresponding top cover 1 or bottom groove 2 through a plurality of fixing bolts 5, and the guide roller 3 on the top cover 1 and the guide roller 3 on the bottom groove 2 are arranged in a one-to-one staggered manner;
a half-shape adjusting hole and a half-shape hole are respectively formed in the protruding platform 10 and the recessed platform 11, the left end of the half-shape hole is communicated with the right end of the corresponding half-shape adjusting hole, the left end penetrates through the right end face of the corresponding platform, one ends, close to the left end of the half-shape adjusting hole, of a plurality of guide rollers of the top cover guide area and one end, close to the left end of the half-shape adjusting hole, of a plurality of guide rollers of the bottom groove guide area are of a necking structure, the left end of the half-shape adjusting hole is communicated with the necking structure formed by the corresponding plurality of guide rollers, the left end of the bottom groove 2 is a feed inlet 6, and a plurality of heating rollers 9 uniformly penetrate through the inside of the bottom groove 2 and the inside of the top cover 1; the raised platform 10 is provided with a top cover half-shape adjusting hole 7 and a top cover half-shape hole 8; a bottom groove semi-shape adjusting hole 12 and a bottom groove semi-shaping hole 13 which are recessed on the platform 11;
when the top cover 1 is attached to the bottom groove 2, a plurality of guide rollers 3 on the top cover 1 and a plurality of guide rollers 3 on the bottom groove 2 are matched to form a fold-line-shaped guide roller set, the guide rollers 3 of the fold-line-shaped guide roller set are arranged at equal intervals, the raised platform 10 and the recessed platform 11 enclose to form a complete shape adjusting hole and a complete shaping hole, the thermoplastic fiber reinforced resin-based prepreg tape is pulled by the traction device to enter the device from a feed inlet 6 at the left end of the bottom groove 2, and the shaping of the composite material rib is realized after the folding-line-shaped guide roller set, the complete shape adjusting hole and the complete shaping hole are sequentially carried out.
The thermoplastic resin matrix of the thermoplastic fiber reinforced resin-based prepreg tape is nylon 6 (PA 6), nylon 12 (PA 12) or polypropylene (PP), and the reinforcing fiber is continuous carbon fiber or continuous glass fiber.
The half-shape adjusting holes and the half-shape holes are positioned at the middle positions of the corresponding platforms.
The number of the guide rollers 3 of the fold-line-shaped guide roller group is not less than 7, the guide rollers positioned in the middle are linear guide rollers, the guide rollers on two sides are arranged at the center of the top cover 1 and gather towards the whole shape adjusting hole in a fold line shape, the bending positions of the guide rollers on two sides are distributed at two thirds of the length of the guide rollers from the feeding hole 6 to the shaping hole, the distance between every two adjacent guide rollers 3 near one end of the feeding hole 6 is greater than or equal to the diameter of one guide roller and less than the diameter of two guide rollers, and the distance between every two adjacent guide rollers 3 near one end of the whole shape adjusting hole is 5-10mm.
The long-strip-shaped groove base 4 is provided with a semicircular groove, the guide roller 3 is arranged in the semicircular groove, the height range of the long-strip-shaped groove base 4 is 20-30mm, and the diameter range of the guide roller 3 is 16-24mm.
The fixing bolts 5 are arranged along the length direction of the guide roller 3, the number of the fixing bolts is not less than 4, and the diameter range is 12-16mm.
The section of one end of the complete shape adjusting hole, which is communicated with the necking of the guide roller set, is elliptical, the length of the major axis of the ellipse is larger than the necking size of the guide roller set, the length of the minor axis of the ellipse is larger than the diameter of the guide roller, the section of one end of the complete shape adjusting hole, which is communicated with the complete shaping hole, is circular, and the diameter of the circular is the same as the diameter of the shaping hole and is the diameter of the prepared composite material rib.
The height of the strip-shaped groove base 4 of the top cover guide area and the bottom groove guide area is the same as the diameter of the guide roller 3.
The method for preparing the composite material rib by using the device for preparing the composite material rib by using the thermoplastic fiber reinforced resin-based prepreg tape specifically comprises the following steps:
step 1), preheating: firstly, the top cover 1 and the bottom groove 2 are buckled, and the temperature of a heating roller 9 on the top cover 1 and the bottom groove 2 is regulated to be higher than the melting temperature of thermoplastic resin; the temperature of a heating roller 9 penetrating through the top cover 1 and the bottom groove 2 is adjusted to be 5-10 ℃ higher than the melting temperature of the thermoplastic resin;
step 2), pre-soaking tape penetrating die: lifting the top cover 1, enabling the thermoplastic prepreg tape to sequentially pass through a feed inlet 6, a guide roller 3, a semi-shape adjusting hole and a semi-shape hole on the bottom groove 2, then matching the top cover 1 with the bottom groove 2 again, and changing the sheet-shaped thermoplastic prepreg tape into a thermoplastic prepreg tape with a wave-shaped section under the action of the group of the fold-line-shaped guide rollers 3 under the action of the gravity of the top cover 1;
step 3), shaping and cooling: drawing the thermoplastic prepreg tape to finish shaping through the complete shape adjusting holes and the complete shaping holes to form composite material ribs, drawing the complete shaping holes, and cooling at room temperature;
step 4), cutting: the formed composite bar is cut to the desired length.
Two specific examples are given below:
the first embodiment is as follows: preparation of continuous carbon fiber reinforced PA6 rib with diameter of 20mm
The preparation device for continuously preparing the composite material rod by using the thermoplastic prepreg tape comprises a top cover 1 and a bottom groove 2, wherein the top cover 1 is divided into a top cover guide area and a top cover shaping area, the top cover shaping area is a raised platform 10 arranged at the right end of the lower surface of the top cover 1, the bottom groove 2 is divided into a bottom groove guide area and a bottom groove shaping area, the bottom groove shaping area is a recessed platform 11 arranged at the right end of the upper surface of the bottom groove 2, a plurality of strip-shaped groove bases 4 are respectively arranged in the top cover guide area and the bottom groove guide area, a guide roller 3 is arranged in each strip-shaped groove base 4, the guide roller 3 and the strip-shaped groove base 4 are fixedly connected with the corresponding top cover 1 or the corresponding bottom groove 2 through a plurality of fixing bolts 5, and the guide roller 3 on the top cover 1 and the guide roller 3 on the bottom groove 2 are arranged in a one-to-one staggered manner;
a half-shape adjusting hole and a half-shape hole are respectively formed in the protruding platform 10 and the recessed platform 11, the left end of the half-shape hole is communicated with the right end of the corresponding half-shape adjusting hole, the left end penetrates through the right end face of the corresponding platform, one ends, close to the left end of the half-shape adjusting hole, of a plurality of guide rollers of the top cover guide area and one end, close to the left end of the half-shape adjusting hole, of a plurality of guide rollers of the bottom groove guide area are of a necking structure, the left end of the half-shape adjusting hole is communicated with the necking structure formed by the corresponding plurality of guide rollers, the left end of the bottom groove 2 is a feed inlet 6, and a plurality of heating rollers 9 uniformly penetrate through the inside of the bottom groove 2 and the inside of the top cover 1; the raised platform 10 is provided with a top cover half-shape adjusting hole 7 and a top cover half-shape hole 8; a bottom groove semi-shape adjusting hole 12 and a bottom groove semi-shaping hole 13 which are recessed on the platform 11;
when the top cover 1 is attached to the bottom groove 2, a plurality of guide rollers 3 on the top cover 1 and a plurality of guide rollers 3 on the bottom groove 2 are matched to form a fold-line-shaped guide roller group, the guide rollers 3 of the fold-line-shaped guide roller group are arranged at equal intervals, the raised platform 10 and the recessed platform 11 enclose a complete shape adjusting hole and a complete shaping hole, a thermoplastic fiber reinforced resin-based prepreg tape is pulled by a traction device to enter the device from a feed inlet 6 at the left end of the bottom groove 2, and the shaping of the composite material bar is realized after the folding-line-shaped guide roller group, the complete shape adjusting hole and the complete shaping hole are sequentially carried out;
the diameter of the guide roller 3 is 20mm, the number is 7, the guide rollers in the middle are straight-line guide rollers, the guide rollers on two sides are arranged at the central position of the top cover 1 and gather towards the whole shape adjusting hole in a fold line shape, the bending positions of the guide rollers on two sides are all arranged at two thirds of the length of the guide rollers in the direction from the feeding hole 6 to the shaping hole, the distance between two adjacent guide rollers 3 close to one end of the feeding hole 6 is 20mm, the distance between two adjacent guide rollers 3 close to one end of the whole shape adjusting hole is 5mm, semicircular grooves are formed in the long-strip-shaped groove base 4, the guide rollers 3 are arranged in the semicircular grooves, the height of the long-strip-shaped groove base 4 is 25mm, the fixing bolts 5 are arranged along the length direction of the guide rollers 3, the number is 4, the diameter is 16mm, the cross section of one end of the whole shape adjusting hole communicated with the shrinkage mouth of the guide roller set is elliptical, the major axis is 180mm, the minor axis is 30mm, the cross section of one end of the whole shape adjusting hole communicated with the whole shape adjusting hole is circular, the diameter is the diameter of the shaping hole is the same as the diameter of the shaping hole (20 mm), and the diameter of the composite rib is equal to the diameter of the composite rib.
The preparation method of the device comprises the following steps:
step 1), preheating: firstly, the top cover 1 and the bottom groove 2 are buckled, and the temperature of a heating roller 9 on the top cover 1 and the bottom groove 2 is regulated to be higher than the melting temperature of thermoplastic resin; the temperature of the heating roller 9 of the top cover 1 and the bottom tank 2 is adjusted to 230 ℃; the principle of the molding method is that the thermoplastic composite material rib is prepared by utilizing the characteristic that thermoplastic resin can be processed secondarily and adopting a heating, melting, cooling and shaping mode, so that the CF/PA6 prepreg tape is required to be preheated, and the CF/PA6 prepreg tape is prevented from directly entering a molding die to cause uneven heating of partial areas of the CF/PA6 prepreg tape, so that the molding effect is poor;
step 2), pre-soaking tape penetrating die: lifting the top cover 1, enabling the CF/PA6 thermoplastic prepreg tape to sequentially pass through a feed inlet 6, a guide roller 3, a semi-shape adjusting hole and a semi-shape hole on the bottom groove 2, then matching the top cover 1 with the bottom groove 2 again, and changing the sheet-shaped thermoplastic prepreg tape into a thermoplastic prepreg tape with a wave-shaped section under the action of a fold line-shaped guide roller 3 group under the action of the gravity of the top cover 1;
step 3), shaping and cooling: drawing the CF/PA6 thermoplastic prepreg tape to finish shaping through the complete shape adjusting hole and the complete shaping hole to form a composite material rib, and cooling at room temperature after drawing the complete shaping hole;
step 4), cutting: the formed CF/PA6 ribs were cut to the desired length.
The second embodiment is as follows: preparation of continuous glass fiber reinforced PP rod with diameter of 22mm
The preparation device for continuously preparing the composite material rod by using the thermoplastic prepreg tape comprises a top cover 1 and a bottom groove 2, wherein the top cover 1 is divided into a top cover guide area and a top cover shaping area, the top cover shaping area is a raised platform 10 arranged at the right end of the lower surface of the top cover 1, the bottom groove 2 is divided into a bottom groove guide area and a bottom groove shaping area, the bottom groove shaping area is a recessed platform 11 arranged at the right end of the upper surface of the bottom groove 2, a plurality of strip-shaped groove bases 4 are respectively arranged in the top cover guide area and the bottom groove guide area, a guide roller 3 is arranged in each strip-shaped groove base 4, the guide roller 3 and the strip-shaped groove base 4 are fixedly connected with the corresponding top cover 1 or the corresponding bottom groove 2 through a plurality of fixing bolts 5, and the guide roller 3 on the top cover 1 and the guide roller 3 on the bottom groove 2 are arranged in a one-to-one staggered manner;
a half-shape adjusting hole and a half-shape hole are respectively formed in the protruding platform 10 and the recessed platform 11, the left end of the half-shape hole is communicated with the right end of the corresponding half-shape adjusting hole, the left end penetrates through the right end face of the corresponding platform, one ends, close to the left end of the half-shape adjusting hole, of a plurality of guide rollers of the top cover guide area and one end, close to the left end of the half-shape adjusting hole, of a plurality of guide rollers of the bottom groove guide area are of a necking structure, the left end of the half-shape adjusting hole is communicated with the necking structure formed by the corresponding plurality of guide rollers, the left end of the bottom groove 2 is a feed inlet 6, and a plurality of heating rollers 9 uniformly penetrate through the inside of the bottom groove 2 and the inside of the top cover 1; the raised platform 10 is provided with a top cover half-shape adjusting hole 7 and a top cover half-shape hole 8; a bottom groove semi-shape adjusting hole 12 and a bottom groove semi-shaping hole 13 which are recessed on the platform 11;
when the top cover 1 is attached to the bottom groove 2, a plurality of guide rollers 3 on the top cover 1 and a plurality of guide rollers 3 on the bottom groove 2 are matched to form a fold-line-shaped guide roller group, the guide rollers 3 of the fold-line-shaped guide roller group are arranged at equal intervals, the raised platform 10 and the recessed platform 11 enclose a complete shape adjusting hole and a complete shaping hole, a thermoplastic fiber reinforced resin-based prepreg tape is pulled by a traction device to enter the device from a feed inlet 6 at the left end of the bottom groove 2, and the shaping of the composite material bar is realized after the folding-line-shaped guide roller group, the complete shape adjusting hole and the complete shaping hole are sequentially carried out;
the diameter of the guide roller 3 is 22mm, the number is 7, the guide rollers in the middle are straight-line guide rollers, the guide rollers on two sides are arranged at the central position of the top cover 1 and gather towards the whole shape adjusting holes in a fold line shape, the bending positions of the guide rollers on two sides are all arranged at two thirds of the length of the guide rollers in the direction from the feeding hole 6 to the shaping hole, the distance between two adjacent guide rollers 3 close to one end of the feeding hole 6 is 25mm, the distance between two adjacent guide rollers 3 close to one end of the whole shape adjusting hole is 5mm, semicircular grooves are formed in the long-strip-shaped groove base 4, the guide rollers 3 are arranged in the semicircular grooves, the height of the long-strip-shaped groove base 4 is 25mm, the fixing bolts 5 are arranged along the length direction of the guide rollers 3, the number is 4, the diameter is 16mm, the cross section of one end of the whole shape adjusting hole communicated with the shrinkage mouth of the guide roller set is elliptical, the major axis is 190mm, the minor axis is 35mm, the cross section of one end of the whole shape adjusting hole communicated with the whole shape adjusting hole is circular, the diameter is the same as the shaping hole diameter (22 mm), and the diameter of the whole shape adjusting hole is equal to the diameter of the shaping hole is equal to the rib.
The preparation method of the device comprises the following steps:
step 1), preheating: firstly, the top cover 1 and the bottom groove 2 are buckled, and the temperature of a heating roller 9 on the top cover 1 and the bottom groove 2 is regulated to be higher than the melting temperature of thermoplastic resin; the temperature of the heating roller 9 of the top cover 1 and the bottom tank 2 is adjusted to 180 ℃; the principle of the molding method is that thermoplastic resin is utilized to prepare thermoplastic composite material ribs in a heating, melting, cooling and shaping mode, so that GF/PP prepreg tape needs to be preheated, and the GF/PP prepreg tape is prevented from directly entering a molding die to cause uneven heating of partial areas of the GF/PP prepreg tape, so that the molding effect is poor;
step 2), pre-soaking tape penetrating die: lifting the top cover 1, enabling the GF/PP thermoplastic prepreg tape to sequentially pass through a feed inlet 6, a guide roller 3, a semi-shape adjusting hole and a semi-shape hole on the bottom groove 2, then matching the top cover 1 with the bottom groove 2 again, and changing the sheet thermoplastic prepreg tape into a thermoplastic prepreg tape with a wave-shaped section under the action of a fold line-shaped guide roller 3 group under the action of the gravity of the top cover 1;
step 3), shaping and cooling: drawing the GF/PP thermoplastic prepreg tape, completing shaping through the complete shape adjusting holes and the complete shaping holes to form composite material ribs, drawing the complete shaping holes, and cooling at room temperature;
step 4), cutting: the formed GF/PP ribs were cut to the desired length.
The measured porosities of the CF/PA6 ribs and the GF/PP ribs obtained by the device reach 1.5% -2%, and the preparation device and the preparation method have the advantages of high production efficiency, low cost, simple operation and strong applicability, and the prepared product has low porosity and good dimensional stability.
The embodiments of the invention disclosed above are intended only to help illustrate the invention. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention.
Claims (10)
1. A device for preparing a composite material rib by using a thermoplastic fiber reinforced resin-based prepreg tape is characterized in that: the novel structure comprises a top cover (1) and a bottom groove (2), wherein the top cover (1) is divided into a top cover guide area and a top cover shaping area, the top cover shaping area is a raised platform (10) arranged at the right end of the lower surface of the top cover (1), the bottom groove (2) is divided into a bottom groove guide area and a bottom groove shaping area, the bottom groove shaping area is a recessed platform (11) arranged at the right end of the upper surface of the bottom groove (2), a plurality of strip-shaped groove bases (4) are respectively arranged in the top cover guide area and the bottom groove guide area, a guide roller (3) is arranged in each strip-shaped groove base (4), the guide roller (3) and the strip-shaped groove bases (4) are fixedly connected with the corresponding top cover (1) or bottom groove (2) through a plurality of fixing bolts (5), and the guide rollers (3) on the top cover (1) are arranged in a staggered manner with the guide rollers (3) on the bottom groove (2) one by one.
A half-shape adjusting hole and a half-shape hole are respectively formed in the protruding platform (10) and the recessed platform (11), the left end of the half-shape hole is communicated with the right end of the corresponding half-shape adjusting hole, the left end penetrates through the right end face of the corresponding platform, one end, close to the left end of the half-shape adjusting hole, of each of a plurality of guide rollers of the top cover guide area and a plurality of guide rollers of the bottom groove guide area is of a necking structure, the left end of the half-shape adjusting hole is communicated with the necking structure formed by the corresponding guide rollers, the left end of the bottom groove (2) is provided with a feeding hole (6), and a plurality of heating rollers (9) uniformly penetrate through the inside of the bottom groove (2) and the inside of the top cover (1);
when top cap (1) and kerve (2) are laminated, a plurality of guide rollers (3) on top cap (1) and a plurality of guide rollers (3) on kerve (2) cooperate to form a broken line-shaped guide roller group, and a plurality of guide rollers (3) of broken line-shaped guide roller group are equidistant to be arranged, protruding platform (10) and concave platform (11) enclose into complete shape regulation hole and complete shaping hole, in the feed inlet (6) entering device from kerve (2) left end is pulled by draw gear to thermoplastic fiber reinforced resin base prepreg tape, realize the shaping of combined material muscle after broken line-shaped guide roller group, complete shape regulation hole and complete shaping hole in proper order.
2. An apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape as claimed in claim 1, wherein: the thermoplastic resin matrix of the thermoplastic fiber reinforced resin-based prepreg tape is nylon 6, nylon 12 or polypropylene, and the reinforcing fiber is continuous carbon fiber or continuous glass fiber.
3. An apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape as claimed in claim 1, wherein: the half-shape adjusting holes and the half-shape holes are positioned at the middle positions of the corresponding platforms.
4. An apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape as claimed in claim 1, wherein: the number of the guide rollers (3) of the fold-line-shaped guide roller group is not less than 7, the guide rollers positioned in the middle are linear guide rollers, the guide rollers on two sides are arranged at the center position of the top cover (1) and gather towards the whole shape adjusting hole in a fold line shape, the bending positions of the guide rollers on two sides are distributed at two thirds of the length of the guide rollers from the feeding hole (6) to the shaping hole direction, the distance between every two adjacent guide rollers (3) close to one end of the feeding hole (6) is greater than or equal to the diameter of one guide roller and less than the diameter of two guide rollers, and the distance between every two adjacent guide rollers (3) close to one end of the whole shape adjusting hole is 5-10mm.
5. An apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape as claimed in claim 1, wherein: semicircular grooves are formed in the long-strip-shaped groove bases (4), the guide rollers (3) are arranged in the semicircular grooves, the height range of the long-strip-shaped groove bases (4) is 20-30mm, and the diameter range of the guide rollers (3) is 16-24mm.
6. An apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape as claimed in claim 1, wherein: the fixing bolts (5) are arranged along the length direction of the guide roller (3), the number of the fixing bolts is not less than 4, and the diameter range is 12-16mm.
7. An apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape as claimed in claim 1, wherein: the section of one end of the complete shape adjusting hole communicated with the necking of the guide roller set is elliptical, the length of the major axis of the ellipse is larger than the necking size of the guide roller set, the length of the minor axis of the ellipse is larger than the diameter of the guide roller, the section of one end of the complete shape adjusting hole communicated with the complete shaping hole is circular, and the diameter of the circular shape adjusting hole is the same as the diameter of the shaping hole and is the diameter of the prepared composite material rib.
8. An apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape as claimed in claim 1, wherein: the height of the strip-shaped groove base (4) of the top cover guide area and the bottom groove guide area is the same as the diameter of the guide roller (3).
9. A method of manufacturing a composite bar using an apparatus for manufacturing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape according to any one of claims 1 to 8, wherein: the method specifically comprises the following steps:
step 1), preheating: firstly, buckling the top cover (1) and the bottom groove (2), and adjusting the temperature of a heating roller (9) on the top cover (1) and the bottom groove (2) to be higher than the melting temperature of the thermoplastic resin;
step 2), pre-soaking tape penetrating die: lifting the top cover (1), enabling the thermoplastic prepreg tape to sequentially pass through a feed inlet (6), a guide roller (3), a half-shape adjusting hole and a half-shape hole on the bottom groove (2), then matching the top cover (1) with the bottom groove (2) again, and changing the sheet-shaped thermoplastic prepreg tape into a thermoplastic prepreg tape with a wave-shaped section under the action of a broken line-shaped guide roller (3) group under the action of the gravity of the top cover (1);
step 3), shaping and cooling: drawing the thermoplastic prepreg tape to finish shaping through the complete shape adjusting holes and the complete shaping holes to form composite material ribs, drawing the complete shaping holes, and cooling at room temperature;
step 4), cutting: the formed composite bar is cut to the desired length.
10. A method of preparing a composite bar using an apparatus for preparing a composite bar using a thermoplastic fiber reinforced resin based prepreg tape as claimed in claim 9, wherein: in the step 1), the temperature of the heating roller (9) penetrating through the top cover (1) and the bottom groove (2) is adjusted to be 5-10 ℃ higher than the melting temperature of the thermoplastic resin.
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| CN202210395691.4A CN114770978B (en) | 2022-04-15 | 2022-04-15 | Device and method for preparing composite material rib by using thermoplastic fiber reinforced resin-based prepreg tape |
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| CN202210395691.4A CN114770978B (en) | 2022-04-15 | 2022-04-15 | Device and method for preparing composite material rib by using thermoplastic fiber reinforced resin-based prepreg tape |
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| CN113442465A (en) * | 2021-06-28 | 2021-09-28 | 哈尔滨工业大学 | Forming device and method for preparing composite material rod by utilizing thermoplastic prepreg tape |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107866954A (en) * | 2016-09-26 | 2018-04-03 | 中国石油化工股份有限公司 | The manufacture method and equipment of continuous fiber reinforced thermoplastic resin prepreg tape |
| CN112313055A (en) * | 2018-06-20 | 2021-02-02 | 三菱化学株式会社 | Prepreg sheet and method for producing same, fiber-reinforced composite material molded article and method for producing same, and method for producing preform |
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