CN116476389A - Unidirectional fibrilia prepreg production line and production process - Google Patents
Unidirectional fibrilia prepreg production line and production process Download PDFInfo
- Publication number
- CN116476389A CN116476389A CN202310449548.3A CN202310449548A CN116476389A CN 116476389 A CN116476389 A CN 116476389A CN 202310449548 A CN202310449548 A CN 202310449548A CN 116476389 A CN116476389 A CN 116476389A
- Authority
- CN
- China
- Prior art keywords
- fibrilia
- hot
- film
- pressing
- unidirectional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 52
- 238000007731 hot pressing Methods 0.000 claims abstract description 83
- 238000009960 carding Methods 0.000 claims abstract description 57
- 239000002131 composite material Substances 0.000 claims abstract description 40
- 238000004804 winding Methods 0.000 claims abstract description 22
- 239000007888 film coating Substances 0.000 claims abstract description 18
- 238000009501 film coating Methods 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims description 57
- 229920005989 resin Polymers 0.000 claims description 57
- 238000001816 cooling Methods 0.000 claims description 37
- 238000007599 discharging Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 238000010030 laminating Methods 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 25
- 238000010924 continuous production Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 3
- 230000002860 competitive effect Effects 0.000 abstract description 2
- 241000208202 Linaceae Species 0.000 description 7
- 235000004431 Linum usitatissimum Nutrition 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 6
- 244000025254 Cannabis sativa Species 0.000 description 5
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 5
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 5
- 235000009120 camo Nutrition 0.000 description 5
- 235000005607 chanvre indien Nutrition 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 239000011487 hemp Substances 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 229920002994 synthetic fiber Polymers 0.000 description 4
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 240000008564 Boehmeria nivea Species 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 240000000491 Corchorus aestuans Species 0.000 description 1
- 235000011777 Corchorus aestuans Nutrition 0.000 description 1
- 235000010862 Corchorus capsularis Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/80—Rotatable transfer means for loading or unloading purposes, i.e. turret transfer means
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/024—Thermal pre-treatments
- B29C66/0242—Heating, or preheating, e.g. drying
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/03—After-treatments in the joint area
- B29C66/034—Thermal after-treatments
- B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention provides a unidirectional fibrilia prepreg production line and a unidirectional fibrilia prepreg production process. The production line is sequentially provided with a feeding zone, a drafting carding zone, a composite hot-pressing zone and a winding zone according to the conveying direction of fibrilia. The feeding zone comprises a feeding guide, the drafting carding zone comprises a first drafting roller, a carding device and a second drafting roller, and the composite hot-pressing zone comprises a first film-coating hot-pressing device and a second film-coating hot-pressing device. The unidirectional fibrilia prepreg with high orientation, uniform fiber distribution and controllable surface density can be obtained through the unidirectional fibrilia prepreg production line and the unidirectional fibrilia prepreg production process, and meanwhile, the unidirectional fibrilia prepreg production line and the unidirectional fibrilia prepreg production process are simple and feasible, are environment-friendly in production, realize low-cost continuous production of unidirectional fibrilia prepreg, and have great competitive power in the market.
Description
Technical Field
The invention relates to the field of preparation of fiber reinforced composite materials, in particular to a unidirectional fibrilia prepreg production line and a unidirectional fibrilia prepreg production process.
Background
Because the traditional composite material uses reinforcing phases such as carbon fiber, glass fiber, aramid fiber and the like, the manufacture of the artificial fiber needs to consume a large amount of energy, and the composite material is difficult to realize recycling or degradation after the life cycle is finished, thereby causing environmental protection problem. The plant fiber is used as a novel composite material reinforcing phase, and is derived from renewable plants, so that the plant fiber consumes less energy, can be naturally degraded, has excellent performance, and is favored by the composite material application industry. Among them, the mechanical properties of fibrilia, particularly flax and jute, are excellent in many plant fibers.
The manufacturing method of the fibrilia woven cloth prepreg has lower technical difficulty, and can almost directly apply the existing artificial fiber prepreg production equipment to compound the resin and the woven cloth. The prior industry discloses a preparation method of a hemp fabric prepreg and a composite material, because the fabric is formed by embracing twisted fibers into yarns, the fiber orientation is poor, the mechanical properties cannot be fully exerted, the yarns are woven into the fabric by warp knitting, the arrangement among the fibers is compact, the infiltration of resin is not easy, and the interface properties of the materials cannot be utilized. The composite material prepared as a whole has poor performance.
In the unidirectional fibrilia prepreg, the fibrilia is required to be straight, the orientation degree is high, and the spreading and the distribution are uniform. However, unidirectional fibrilia prepregs cannot be produced by means of a device for the production of unidirectional synthetic fiber prepregs, mainly because the synthetic fibers may be continuous fibers of indefinite length, whereas the length of the fibrilia is limited, the diameter of the fibrilia filaments is about 10-20 μm, the length is only 1-30mm, the diameter of the fibrilia bundles can reach 200-300 μm, and the length 300-750mm. The creel length of the common unidirectional prepreg is more than 7m, and the fibrilia breaks in the drawing process of a plurality of meters, so that continuous production cannot be realized. There is a production of long fibrilia prepreg described in the literature, wherein the process is characterized in that long fibrilia is fed into a carding roll and a fiber spreading device, and then film is coated. The air jet device of the fiber spreading device realizes the main yarn spreading function. Obviously, on one hand, the strong air flow can blow away tiny short fibers, so that material loss is caused, the tiny short fibers can also cause air dust pollution, and serious people can cause explosion or fire when encountering open fire; on the other hand, the fibers are blown and twisted, and straightness is lowered. In order to solve the length problem, the document adds a shaping station, and the adhesive force between the fibers is enhanced by spraying a shaping solution on the fibrilia, so that the risk of drawing fracture is reduced in the subsequent drawing process. This solution uses a viscous chemical solution containing a relatively high amount of volatile solvents that need to be completely volatilized by heating prior to impregnation. Volatile solvents are generally inflammable and explosive, and the volatile solvents are added with scattered tiny short fibers in the air, so that environmental pollution and potential safety hazard are brought to production, and even if a solvent collecting device is erected, the method is still a complex and high-cost manufacturing method of unidirectional fibrilia prepreg.
Therefore, there is a strong need for a unidirectional fibrilia prepreg production line and process to solve the above problems.
Disclosure of Invention
The invention aims to provide a unidirectional fibrilia prepreg production line and a unidirectional fibrilia prepreg production process, which can obtain unidirectional fibrilia prepreg with high orientation, uniform fiber distribution and controllable surface density, meanwhile, the unidirectional fibrilia prepreg production line does not need to use high-pressure air to blow and spread fibrilia, avoids forming floating dust in air by a large amount of short fibers, does not need to use organic solvents to spray and shape the fibrilia, and is simple and feasible in production line and production process, environment-friendly in production, low-cost continuous production of unidirectional fibrilia prepreg is realized, and the unidirectional fibrilia prepreg production line is very competitive in market.
In order to achieve the aim, the invention provides a unidirectional fibrilia prepreg production line, which is sequentially provided with a feeding zone, a drafting and carding zone, a composite hot-pressing zone and a winding zone according to the fibrilia conveying direction,
the feeding zone comprises a feeding guide, wherein the feeding guide comprises a main shaft for pulling the fibrilia and a baffle plate which is fixed on the main shaft and is used for separating the fibrilia;
the drafting and carding area sequentially comprises a first drafting roller, a carding device and a second drafting roller according to the conveying direction of the fibrilia, the carding device comprises a carding box, the first drafting roller is used for drawing the fibrilia to the carding box, the carding box comprises a needle row used for directionally carding the fibrilia and holding the fibrilia, and the second drafting roller is used for stretching and thinning the carded fibrilia and drawing the fibrilia to the composite hot-pressing area for composite hot-pressing;
the composite hot-pressing area comprises a first film-coating hot-pressing device and a second film-coating hot-pressing device, wherein the first film-coating hot-pressing device and the second film-coating hot-pressing device are respectively used for compositing resin films on the upper surface and the lower surface of the fibrilia after carding;
and the winding area comprises a winding device for winding the fibrilia after the composite hot pressing.
Compared with the prior art, the feeding guide comprises the main shaft and the baffle plates, when the fibrilia passes through the feeding guide, the main shaft plays a role in supporting the fibrilia, each bundle of fibrilia is positioned between two adjacent baffle plates, the baffle plates play a role in separating the fibrilia and limiting the width of the fibrilia, and meanwhile, the baffle plates can also prevent overlapping caused by the position channeling among the fibrilia to disturb respective operation. The carding device comprises the comb box, the needle row in the comb box can directionally comb the fibrilia, so that the fibrilia becomes thinner under the condition of basically unchanged width, and meanwhile, the carding device, the first drawing roller and the second drawing roller are mutually cooperated, so that the fibrilia is kept in a tight and straight state in the conveying process, and the orientation of the fibrilia is further improved.
Preferably, the number of the baffle plates is plural, and the baffle plates are uniformly distributed at intervals along the direction perpendicular to the conveying direction of the fibrilia.
Preferably, the first laminating hot pressing device and the second laminating hot pressing device each comprise a first release film collecting roller, a first resin film discharging roller and a first resin film hot pressing roller which are used for sequentially processing the fibrilia according to the fibrilia conveying direction.
Preferably, the number of the first resin film hot-pressing rollers is even, the even number of the first resin film hot-pressing rollers are symmetrically arranged on the upper side and the lower side of the fibrilia, the two oppositely arranged first resin film hot-pressing rollers are in a group, and a film-covering hot-pressing channel is formed between the first resin film hot-pressing rollers in each group.
Preferably, the first resin film hot-pressing rollers have a plurality of groups, the plurality of groups of first film hot-pressing rollers are sequentially arranged along the fibrilia conveying direction, and the formed film hot-pressing channels are gradually narrowed along the fibrilia conveying direction.
Preferably, a cooling film-changing area is further arranged between the composite hot-pressing area and the winding area, and the cooling film-changing area sequentially comprises a cooling device for cooling the fibrilia subjected to composite hot pressing and a film-changing device for film-changing treatment according to the conveying direction of the fibrilia.
Preferably, the cooling device comprises a cooling plate and a cold plate press roller capable of pressing the cooling plate.
Preferably, the film changing device comprises a second release paper collecting roller, a second release film discharging roller and a first release film hot pressing roller which are used for sequentially processing the fibrilia according to the fibrilia conveying direction.
Preferably, the drafting and carding zone further comprises a third drafting roller, and the third drafting roller is positioned between the second drafting roller and the composite hot-pressing zone; preferably, the distance between the second drawing roller and the third drawing roller is 100mm-800mm, preferably 400mm; the distance between the third draft roller and the first resin film hot-pressing roller is 100mm to 800mm, preferably 400mm.
Preferably, an observation area is arranged between the second drawing roller and the third drawing roller, preferably, a backlight is arranged in the observation area, and preferably, the backlight is a cold light source.
The invention also provides a production process of the unidirectional fibrilia prepreg, which comprises the following steps:
s1, fibrilia feeding: drawing a plurality of bundles of fibrilia into a carding apparatus having a feed guide and a needle bar, the feed guide having a baffle, the fibers being separated by the baffle after drawing;
s2, drafting and carding: the separated fibrilia is directionally carded by adopting the needle row;
s3, composite hot pressing: respectively compounding resin films on the upper and lower surfaces of the fibrilia after carding;
s4, rolling.
Further, a cooling film-changing step is further included between the step S3 and the step S4: and cooling the fibrilia after the composite hot pressing, and peeling the original release paper and then re-coating the release film.
Further, in the step S3, the temperature of the composite hot press is 50 ℃ to 120 ℃, preferably 65 ℃.
Drawings
FIG. 1 is an arrangement of a first embodiment of a unidirectional fibrilia prepreg production line of the present invention;
FIG. 2 is an arrangement of a second embodiment of the unidirectional fibrilia prepreg production line of the present invention;
FIG. 3 is a perspective view of a feed guide in the unidirectional fibrilia prepreg production line of the present invention;
FIG. 4 is a perspective view of a pin row in the unidirectional fibrilia prepreg production line of the present invention;
FIG. 5 is a perspective view of a cleaning brush in a unidirectional fibrilia prepreg production line of the present invention;
FIG. 6 is a layout of a plurality of heated press rolls in a unidirectional fibrilia prepreg production line of the present invention.
In the drawing, a 100-feeding zone, a 11-charging barrel, a 111-sliver, a 12-feeding guide, a 121-main shaft, a 122-baffle, a 200-drafting carding zone, a 21-first drafting roller, a 22-carding box, a 221-needle row, a 2211-needle row seat, a 2212-needle dredging, a 222-cleaning brush, a 2221-brush body, 2222-brush hair, a 23-second drafting roller, a 24-third drafting roller, a 25-backlight lamp, a 26-unidirectional flax, a 300-composite hot press zone, a 31-first release film collecting roller, a 311-first release film, a 32-first resin film discharging roller, a 321-resin film and a release paper carrier, 33-first resin film hot press roller, 331-tectorial membrane hot press channel, 34-preheating plate, 35-unidirectional fibrilia prepreg, 400-cooling and film changing area, 41-cooling device, 411-cooling plate, 412-cold plate press roller, 42-second release paper collecting roller, 421-release paper, 43-second release film discharging roller, 431-second release film, 44-first release film hot press roller, 45-unidirectional fibrilia prepreg of single-sided release paper, 46-unidirectional fibrilia prepreg coated with release paper and release film, 500-winding area, 51-winding device.
Detailed Description
For better illustrating the objects, technical solutions and advantageous effects of the present invention, the present invention will be further described with reference to the accompanying drawings. The embodiments of the following drawings are further illustrative of the present invention and should not be construed as limiting the invention.
As shown in fig. 1 and 2, the present invention discloses a unidirectional fibrilia prepreg production line, in which a feeding zone 100, a drawing carding zone 200, a composite hot-pressing zone 300, a cooling film-changing zone 500 and a winding zone 400 are sequentially arranged along a fibrilia conveying direction.
The feeding zone 100 is for feeding of the hemp fibers, and the feeding zone 100 comprises a feeding guide 12. The feeding guide 12 includes a main shaft 121 for drawing the fibrilia and a baffle 122 fixed to the main shaft 121 for separating the fibrilia. As shown in fig. 2, a plurality of feeding guides 12 may be provided, and a plurality of feeding guides 12 may be arranged along the transporting direction of the fibrilia, so that the guiding effect on the fibrilia may be better achieved. The distance between adjacent two guides 12 is between 200mm and 1500mm, preferably 750mm. A feed cylinder 11 is also provided at the front end of the feed guide 12, the feed cylinder 11 being used for storage of the fibrilia.
As shown in fig. 3, there are a plurality of baffle plates 122, and the plurality of baffle plates 122 are uniformly spaced along the direction perpendicular to the transporting direction of the fibrilia, and a single Shu Ma fiber is placed between two adjacent baffle plates 122. The baffle 122 serves to separate individual fibers and limit the width of the fibers, and the baffle 122 also prevents overlap between the fibers and disturbing their operation. The flaps 122 are designed to be thin, preferably 2mm thick, and the distance between two adjacent flaps 122 is approximately equal to the width of the fibrilia. In actual production, the fibrilia with the required width can be obtained by adjusting the distance between the adjacent baffle plates. This design, in combination with the subsequent drafting and carding zone, eliminates the gaps between the fibrilia and makes the fibrilia evenly distributed in width.
As further shown in FIG. 1, the drafting and carding zone 200 is used for drafting and carding the fibrilia, so that the fibrilia becomes thinner and smaller in surface density under the condition of almost unchanged width, and simultaneously, the fibrilia is stretched and straightened, and the fibrilia orientation is improved. The drafting and carding zone 200 comprises, in order of the direction of transport of the fibrilia, a first drafting roller 21, a carding unit (not shown), a second drafting roller 23. The first drawing roller 21 is used for drawing the fibrilia to the carding unit and flattening the height-wise undulations of the fibrilia formed during storage of the cylinder 11. The carding device carries out directional carding on the fibrilia, the carding device comprises a carding box 22, the carding box 22 comprises a needle row 221 for carrying out directional carding on the fibrilia and holding the fibrilia, as shown in fig. 4, the needle row 221 comprises a needle row seat 2211 and a carding needle 2212, the needle row 221 carries out clockwise circular motion in the carding box 22 along a certain track, the needle row 221 horizontally moves along the transporting direction of the fibrilia when being positioned above the box body, and the needle row 221 horizontally moves along the transporting direction of the fibrilia, and the carding needle 2212 drives the fibrilia to continuously move towards the transporting direction by utilizing the friction force between the needle row 221 and the carding needle while inserting the fibrilia into the fibrilia to carry out directional carding.
As shown in fig. 2 and 5, a cleaning brush 222 is further provided inside the comb case 22, and the cleaning brush 222 is rotatably provided inside the comb case 22. The cleaning brush 222 includes a brush body 2221 and bristles 2222 fixed to the brush body 2221. After the comb 2212 is pulled away from the fibrilia, the cleaning brush 222 cleans the needle row 221 during the return process.
The second drawing roller 23 is used for drawing the fibrilia to the composite hot-pressing area, and simultaneously further straightening and thinning the fibrilia; the materials of the upper roller and the lower roller of the second draft roller 23 may be inconsistent; preferably, the upper roller of the second drawing roller 23 is a rubber roller, the lower roller is a heat-treated and hardened 45-grade steel roller, and a groove (not shown in the figure) is further formed in the lower roller. The friction force between the second drawing roller 23 and the fibrilia can be increased by the arrangement, so that the second drawing roller 23 can accurately hold the fibrilia.
As further shown in fig. 2, the drawing and carding zone 200 further includes a third drawing roller 24 for supporting and drawing the fibrilia, the third drawing roller 24 is located between the second drawing roller 23 and the composite hot-pressing zone 300, an observation zone (not shown) is disposed between the second drawing roller 23 and the third drawing roller 24, and a backlight lamp 25 is disposed in the observation zone, so as to monitor the quality of the fibrilia at all times. Among them, the backlight needs to use a light source with low heat generation, preferably a cold light source.
In the present invention, the relation between the movement speed of the needle bar 221 and the linear speed of the first draft roller 21 is:
V 221 ＝n 1 *V 21 ，(n 1 =1.1-8.0), preferably n 1 =1.3, where V 221 For the speed of movement of the needle row 221, V 21 The linear velocity of the first draft roller 21. The linear velocity of the second draft roller 23 is related to the moving velocity of the needle bar 221: v (V) 23 ＝n 2 *V 221 ，(n 2 =3.0-20), preferably n 2 =7.7, where V 23 V is the linear velocity of the second draft roller 23 221 Is the speed of movement of pin row 221. The relationship between the linear velocity of the third draft roller 24 and the linear velocity of the second draft roller 23 is V 24 ＝n 4 *V 23 ，(n 3 =1.0-1.5), preferably n 3 =1.01, where V 24 For the linear velocity of the third drawing roller 24, V 23 Is the linear velocity of the second draft roller 23. The distance between the second drawing roller 23 and the third drawing roller 24 is 100mm to 800mm, preferably 400mm.
Continuing to refer to fig. 1, the composite hot press area 300 includes a first film-coating hot press device (not shown) and a second film-coating hot press device (not shown), wherein the first film-coating hot press device and the second film-coating hot press device respectively composite resin films on the upper and lower surfaces of the carded fibrilia; the first film laminating hot press device and the second film laminating hot press device each comprise a first release film collecting roller 31, a first resin film discharging roller 32 and a first resin film hot press roller 33 which are used for sequentially processing fibrilia according to the fibrilia conveying direction. The distance between the first resin film heat pressing roller 33 and the third drawing roller 24 is 100mm to 800mm, preferably 400mm.
In general, the resin film roll is of a three-layer structure, and includes a release film, a resin film and release paper from the outside to the inside, and when in use, the release film is usually peeled from the resin film roll to obtain the resin film and release paper carrier, and then the subsequent hot pressing and compounding work is performed. Thus, in the present invention, the first release film collecting roller 31 is used to collect a release film (not shown) unwound from a roll of a resin film; the first resin film discharging roller 32 is used for storing and discharging a resin film (not shown); the first resin film hot press roller 33 is used to impregnate the resin film onto the fibrilia.
A preheating plate 34 is further disposed between the first release film collecting roller 31 and the first resin film hot-pressing roller 33, and the preheating plate 34 is used for preheating the resin film discharged from the first resin film discharging roller 32 and then feeding the resin film into the first resin film hot-pressing roller 33 for hot-pressing film covering operation of fibrilia. As shown in fig. 6, the number of the first resin film hot-pressing rollers 33 is even, the even number of the first resin film hot-pressing rollers 33 are symmetrically arranged on the upper side and the lower side of the fibrilia, two first resin film hot-pressing rollers 33 which are oppositely arranged are in a group, a film-coating hot-pressing channel 331 is formed between each group of the first resin film hot-pressing rollers 33, the first resin film hot-pressing rollers are in a plurality of groups, the first film-coating hot-pressing rollers are sequentially arranged along the transporting direction of the fibrilia, and the formed film-coating hot-pressing channels 331 are gradually narrowed along the transporting direction of the fibrilia, so that the resin film and the fibrilia are more fully infiltrated.
As shown in fig. 2, in order to meet different requirements of the unidirectional fibrilia prepreg in actual production, for example, in some cases, the unidirectional fibrilia prepreg is desirably covered and protected by a light-transmitting and soft release film, so that the unidirectional fibrilia prepreg needs to be subjected to release film replacement treatment. The cooling and film changing area 400 sequentially includes a cooling device 41 for cooling the fibrilia after the composite hot pressing and a film changing device (not shown) for film changing according to the conveying direction of the fibrilia, the cooling device 41 is used for cooling the fibrilia output from the film laminating hot pressing channel 331, so as to prevent the resin from reacting too fast, and the cooling device 41 includes a cooling plate 411 and a cooling plate pressing roller 412 capable of pressing the cooling plate. The film changing device comprises a second release paper collecting roller 42, a second release film discharging roller 43 and a first release film hot pressing roller 44 which are used for sequentially processing the fibrilia according to the fibrilia conveying direction. The second release paper collecting roller 42 is used for collecting release paper (not shown) covered on fibrilia; the second release film discharging roller 43 is used for discharging release films (not shown in the figure), and the first release film hot pressing roller 44 is used for hot compress the release films on the fibrilia after release paper is peeled off.
As shown in fig. 1 and 2, the winding zone 500 includes the step of winding the fibrilia after the hot-pressed filmThe winding device 51 of the roll, specifically, the winding device 51 may be a winding roller (not shown in the drawings), in the present invention, the linear velocity values of the first resin film hot-pressing roller 33, the winding device 51 and the first release film hot-pressing roller 44 are equivalent, and the relationship between the linear velocities of the first resin film hot-pressing roller 33 and the third traction device 24 is as follows: v (V) 33 ＝n 4 *V 24 ，(n 4 =1.01-1.5), preferably n 4 =1.05, where V 33 For the first resin film hot press roller 33 linear velocity, V 24 The linear speed of the third drawing device 24 is set in such a way as to ensure that the fibrilia maintains a certain stretching state between the first resin film hot-pressing roller 33 and the third drawing roller 24, prevent the fibrilia from loosening and rebounding, and maintain the orientation of the fibrilia.
The invention also discloses a production process of the unidirectional fibrilia prepreg, which comprises the following steps.
S1, fibrilia feeding: the method comprises the steps of drawing a plurality of bundles of fibrilia into a carding apparatus having a feed guide and a needle bar, the feed guide having a baffle, the baffle being used to divide the fibrilia after drawing.
S2, drafting and carding: and (3) carrying out directional carding on the separated fibrilia by adopting the needle row.
S3, composite hot pressing: and respectively compounding resin films on the upper and lower surfaces of the carded fibrilia.
S4, rolling.
Wherein, between S3 and S4, the method also comprises a cooling film-changing step: and cooling the fibrilia after the composite hot pressing, and peeling the original release paper and then re-coating the release film.
Specifically, in S3, the preheating is performed before the composite hot pressing at a temperature of 50 ℃ to 90 ℃, preferably at a preheating temperature of 55 ℃.
Specifically, in S3, the temperature of the composite hot press is 50 ℃ to 120 ℃, preferably, the temperature is 65 ℃.
Taking the unidirectional fibrilia prepreg production line shown in fig. 2 as an example, the unidirectional fibrilia prepreg production process of the present invention will be further described. The unidirectional fibrilia prepreg production process comprises the following steps.
S1, feeding of the ramie stripes: a plurality of strands 111 of hemp stored in the barrel 11 (untreated hemp fibers are referred to herein as hemp strands) are drawn into the feed guide 12, respectively placed between two adjacent flaps 122, the strands 111 being arranged in the conveying direction under the support of the main shaft 121.
S2, drafting and carding: the first drawing roller 21 draws the sliver 111 to make the surface of the sliver 111 preliminary smooth, the sliver 111 is drawn to the comb box 22, the needle row 221 in the comb box 22 carries out directional carding on the sliver 111 and holds the sliver 111 to enable the sliver 111 to continuously advance in the conveying direction, the running speed of the needle row 221 is larger than that of the first drawing roller 21, friction force formed between the needle row 221 and the sliver 111 drives the sliver 111 to continuously advance to the second drawing roller 23, the second drawing roller 23 further draws and stretches the sliver 111 at a running speed larger than that of the needle row 221, unidirectional flax 26 is obtained after the sliver 111 is processed, and the third drawing roller 24 continuously supports and draws the unidirectional flax 26 into the composite hot-pressing area 300.
S3, composite hot pressing: the first release film 311 wound on the surface of the resin film on the first resin film discharging roller 32 is peeled and wound into the first release film collecting roller 31, the resin film peeled with the first release film 311 and the release paper carrier 321 are preheated by the preheating plate 34 and then fed into the first resin film hot pressing roller 33 and fully contacted with the unidirectional flax 26 transported to the film coating hot pressing channel 331, and the unidirectional flax 26 is treated as the unidirectional flax fiber prepreg 35.
Cooling and film changing: conveying the unidirectional fibrilia prepreg 35 obtained in the step S3 to a cooling device 41 for cooling, peeling and winding release paper 421 on one side of the unidirectional fibrilia prepreg 35 to a second release paper collecting roller 42 after cooling to obtain unidirectional fibrilia prepreg 45 with one side coated with release paper, feeding a second release film 431 wound on a second release film discharging roller 43 into a first release film hot-pressing roller 44, carrying out hot-pressing compounding with the unidirectional fibrilia prepreg 45 with one side coated with release paper conveyed into a channel of the first release film hot-pressing roller 44 to obtain unidirectional fibrilia prepreg 46 coated with release paper and release film,
s4, rolling: the unidirectional fibrilia prepreg 46 coated with the release paper and the release film is wound up to the winding device 51.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or substituted without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. A unidirectional fibrilia prepreg production line is characterized in that a feeding zone, a drafting carding zone, a composite hot-pressing zone and a winding zone are sequentially arranged according to the fibrilia conveying direction,
the feeding zone comprises a feeding guide, wherein the feeding guide comprises a main shaft for pulling the fibrilia and a baffle plate which is fixed on the main shaft and is used for separating the fibrilia;
the drafting and carding area sequentially comprises a first drafting roller, a carding device and a second drafting roller according to the conveying direction of the fibrilia, the carding device comprises a carding box, the first drafting roller is used for drawing the fibrilia to the carding box, the carding box comprises a needle row used for directionally carding the fibrilia and holding the fibrilia, and the second drafting roller is used for stretching and thinning the carded fibrilia and drawing the fibrilia to the composite hot-pressing area for composite hot-pressing;
the composite hot-pressing area comprises a first film-coating hot-pressing device and a second film-coating hot-pressing device, wherein the first film-coating hot-pressing device and the second film-coating hot-pressing device are respectively used for compositing resin films on the upper surface and the lower surface of the fibrilia after carding;
and the winding area comprises a winding device for winding the fibrilia after the composite hot pressing.
2. A unidirectional fibrilia prepreg production line according to claim 1 wherein there are a plurality of the baffle plates, and a plurality of the baffle plates are arranged at uniform intervals along a direction perpendicular to the transporting direction of the fibrilia.
3. The unidirectional fibrilia prepreg production line of claim 1 wherein the first and second film laminating hot press devices each comprise a first release film collecting roller, a first resin film discharging roller, and a first resin film hot press roller that sequentially process the fibrilia in the fibrilia conveying direction.
4. A unidirectional fibrilia prepreg production line according to claim 3, wherein the number of the first resin film hot-pressing rollers is even, the even number of the first resin film hot-pressing rollers are symmetrically arranged on the upper side and the lower side of the fibrilia, two oppositely arranged first resin film hot-pressing rollers are in a group, and a film-covering hot-pressing channel is formed between one group of the first resin film hot-pressing rollers.
5. The unidirectional fibrilia prepreg production line of claim 4 wherein the first resin film hot-press rolls have a plurality of groups, the plurality of groups of first film hot-press rolls are sequentially arranged along the fibrilia conveying direction and the formed film hot-press channels are gradually narrowed along the fibrilia conveying direction.
6. The unidirectional fibrilia prepreg production line according to claim 1, wherein a cooling and film changing area is further arranged between the composite hot-pressing area and the winding area, and the cooling and film changing area sequentially comprises a cooling device for cooling the fibrilia subjected to composite hot pressing and a film changing device for film changing treatment according to the fibrilia conveying direction.
7. A unidirectional fibrilia prepreg production line according to claim 2 wherein the cooling means comprises a cooling plate and a cold plate press roll capable of pressing the cooling plate.
8. The unidirectional fibrilia prepreg production line according to claim 2, wherein the film changing device comprises a second release paper collecting roller, a second release film discharging roller and a first release film hot pressing roller which are used for sequentially processing the fibrilia according to the fibrilia conveying direction.
9. A process for producing unidirectional fibrilia prepreg, comprising the steps of:
s1, fibrilia feeding: drawing a plurality of bundles of fibrilia into a carding apparatus having a feed guide and a needle bar, the feed guide having a baffle, the baffle being employed to divide the fibrilia after drawing;
s2, drafting and carding: the separated fibrilia is directionally carded by adopting the needle row;
s3, composite hot pressing: respectively compounding resin films on the upper and lower surfaces of the fibrilia after carding;
s4, rolling.
10. The process for producing unidirectional fibrilia prepreg according to claim 9, further comprising a cooling film changing step between S3 and S4: and cooling the fibrilia after the composite hot pressing, and peeling the original release paper and then re-coating the release film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310449548.3A CN116476389A (en) | 2023-04-24 | 2023-04-24 | Unidirectional fibrilia prepreg production line and production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310449548.3A CN116476389A (en) | 2023-04-24 | 2023-04-24 | Unidirectional fibrilia prepreg production line and production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116476389A true CN116476389A (en) | 2023-07-25 |
Family
ID=87226389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310449548.3A Pending CN116476389A (en) | 2023-04-24 | 2023-04-24 | Unidirectional fibrilia prepreg production line and production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116476389A (en) |
-
2023
- 2023-04-24 CN CN202310449548.3A patent/CN116476389A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101840491B1 (en) | Apparatus and methods for spreading fiber bundles for the continuous production of prepreg | |
| CN1034960C (en) | A method of and an apparatus for forming a composite thread | |
| EP2003232B1 (en) | Method and device for creating a unidirectional fibre layer, method for manufacturing a multi-axial layed fabric and a multi-axial machine as well as a method for manufacturing a woven cloth and weaving machine | |
| JP6490074B2 (en) | Equipment for producing multiple synthetic yarns | |
| WO2019093898A2 (en) | Method and device for producing a ribbon and a thread of bamboo fiber | |
| CN104943196A (en) | Production equipment of continuous fiber thermoplastic prepreg tape | |
| JP2012127044A (en) | Fiber material and method for manufacturing the same | |
| CN112497732B (en) | Space truss 3D printing method based on continuous fiber reinforced resin-based prepreg | |
| CN113954392B (en) | Unidirectional long fibrilia prepreg production line and production process | |
| CN109968691B (en) | Fiber thermoplastic casting vibration infiltration pre-dipping machine | |
| CN111212714B (en) | Device and method for impregnating a fiber strand with a polymer melt | |
| CN116476389A (en) | Unidirectional fibrilia prepreg production line and production process | |
| JPS61229535A (en) | Method and device for manufacturing fiber reinforced resin sheet | |
| CN113021936A (en) | Continuous molding device and molding method for thermoplastic composite material sandwich structure | |
| KR100583382B1 (en) | Calendering apparatus and method for heat setting a traveling multi-filament tow | |
| CN211112437U (en) | Production equipment for fiber spreading and forming of carbon fiber bundles | |
| US2773297A (en) | Process and apparatus for making yarn and fabric | |
| CN110877428A (en) | Device and method for preparing high-performance pre-impregnated yarn | |
| KR101676729B1 (en) | the spreading apparatus and the spreading system of yarn therewith | |
| CN213472276U (en) | Continuous fiber yarn spreading system | |
| JPS646012B2 (en) | ||
| CN210117494U (en) | Flash spinning fiber post-treatment equipment | |
| JPS581725A (en) | Continuous production of paralleled fiber bundle sheet | |
| CN106987916A (en) | The production method of the automotive trim numb plate of anti-oxidant polylactic acid degradable composite fibre | |
| CN113400691A (en) | High-performance ultrahigh molecular weight polyethylene strip and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |