CN117656543A - Composite fiber forming control method and formed product thereof - Google Patents
Composite fiber forming control method and formed product thereof Download PDFInfo
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- CN117656543A CN117656543A CN202410006634.1A CN202410006634A CN117656543A CN 117656543 A CN117656543 A CN 117656543A CN 202410006634 A CN202410006634 A CN 202410006634A CN 117656543 A CN117656543 A CN 117656543A
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- 239000000835 fiber Substances 0.000 title claims abstract description 640
- 239000002131 composite material Substances 0.000 title claims abstract description 131
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000000465 moulding Methods 0.000 claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 claims abstract description 53
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 description 6
- 239000003365 glass fiber Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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Abstract
The invention discloses a composite fiber forming control method and a formed product thereof, and relates to the technical field of composite materials. When at least two fiber reels with the same initial fiber yarn length exist in the used fiber reels, after each production preset length, one fiber reel in a plurality of fiber reels is replaced, and the initial fiber yarn length of the replaced fiber reels is different from the current fiber yarn lengths of other fiber reels in a fiber molding processing state, the condition that the plurality of fiber reels are used up simultaneously can be avoided, or the fiber reels with the same initial fiber yarn length and different initial fiber yarn lengths can be directly used at the beginning of fiber molding production, so that the time when all the fiber reels are used up is different, each fiber yarn interface in a composite fiber molding product can be dispersed, the condition that the fiber yarn interfaces are concentrated in a large amount is effectively avoided, the surface of the composite fiber molding product is smooth and the strength reaches the standard, and the production quality of the composite fiber molding product is ensured.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a composite fiber forming control method and a formed product thereof.
Background
In the production of composite fiber molded products, it is necessary to co-pultrude the fiber yarns in a plurality of fiber reels to form the composite fiber molded product. When one fiber yarn roll is used up, it is necessary to connect the replaced fiber yarn roll with a fracture of the replaced fiber yarn roll in fiber molding production even if another fiber yarn roll is replaced, so that the fiber molding production can be continued. The interface of two fiber reels can cause the influence on shape and performance on the composite fiber molded product, especially when a plurality of fiber reels are used up simultaneously, can make the condition that the fiber yarn interface produced in the composite fiber molded product is concentrated in a large amount in one place, seriously influences the production quality of the composite fiber molded product.
Disclosure of Invention
The invention mainly aims to provide a composite fiber forming control method and a formed product thereof, and aims to solve the technical problem that the production quality of the composite fiber formed product is poor due to concentrated fiber yarn interfaces.
According to a first aspect of the present invention, there is provided a composite fiber forming control method comprising the steps of:
providing a plurality of first fiber yarn rolls, wherein the initial fiber yarn lengths of at least two first fiber yarn rolls are the same;
performing fiber forming processing on the fiber yarns in the first fiber yarn rolls to produce a composite fiber formed product;
repeating the following steps until the fiber reels in the fiber forming processing state are all the second fiber reels:
after the composite fiber molded product is produced by a preset length, one of the first fiber yarn rolls is replaced by a second fiber yarn roll, and the initial fiber yarn length of the second fiber yarn roll is different from the current fiber yarn lengths of other fiber yarn rolls in a fiber molding processing state.
In some embodiments, the predetermined length is greater than 1m.
In some embodiments, the plurality of first fiber reels are arranged along a first direction, and when the first fiber reels are replaced with the second fiber reels, the first fiber reels are replaced sequentially in an order from both sides to a middle of the first direction.
In some embodiments, the initial fiber yarn length of each of the second fiber yarn rolls is the same and greater than or equal to the initial fiber yarn length of the first fiber yarn roll having the longest initial fiber yarn length.
In some embodiments, said replacing one of said plurality of first fiber reels with a second fiber reel comprises:
the fiber yarns in the first fiber yarn roll and the second fiber yarn roll are thermosetting fiber yarns, and the replaced second fiber yarn roll is connected with the fracture of the replaced first fiber yarn roll in the fiber forming production by using an air splicer; or alternatively, the first and second heat exchangers may be,
the fiber yarns in the first fiber yarn roll and the second fiber yarn roll are thermoplastic fiber yarns, and the replaced second fiber yarn roll is connected with the fracture of the replaced first fiber yarn roll in the fiber forming production by using a heating device.
In some embodiments, the composite fiber formation control method further comprises:
when one of the second fiber reels is used up, selecting one of the first fiber reels to be replaced from among the plurality of first fiber reels, and connecting the first fiber reels with a fracture of the used second fiber reels in the fiber molding production;
the first fiber yarn rolls selected are the first fiber yarn rolls with the longest current fiber yarn length in all the first fiber yarn rolls which are different from the current fiber yarn lengths of other fiber yarn rolls in the fiber molding processing state.
According to a second aspect of the present invention, there is provided a composite fiber formation control method including the steps of:
providing a plurality of third fiber yarn rolls, wherein the initial fiber yarn lengths of the third fiber yarn rolls are different;
and performing fiber forming processing on the fiber yarns in the third fiber yarn rolls to produce a composite fiber forming product.
In some embodiments, the initial fiber yarn lengths of each two of the third fiber yarn rolls differ by more than 1m.
In some embodiments, the plurality of third fiber yarn packages are arranged in a second direction, and initial fiber yarn lengths of the third fiber yarn packages gradually increase in a direction from both sides of the second direction to a middle portion.
According to a third aspect of the present invention, there is provided a composite fiber-forming product obtained using the composite fiber-forming control method according to the first or second aspect.
The beneficial effects of the invention are as follows:
according to the composite fiber forming control method provided by the invention, the used-up time of each fiber yarn roll in the fiber forming production is different, so that each fiber yarn interface in the composite fiber forming product can be dispersed, the condition that a large number of fiber yarn interfaces are concentrated is effectively avoided, the surface of the composite fiber forming product is smooth, the strength of the composite fiber forming product reaches the standard, and the production quality of the composite fiber forming product is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a prior art composite fiber molded product;
FIG. 2 is a flow chart illustrating a method of controlling composite fiber formation according to an exemplary embodiment;
FIG. 3 is a flow chart illustrating a method of controlling composite fiber formation according to an exemplary embodiment;
FIG. 4 is a flow chart illustrating a method of controlling composite fiber formation according to another exemplary embodiment;
FIG. 5 is a schematic illustration of a composite fiber molded product, according to an exemplary embodiment;
fig. 6 is a cross-sectional view of a composite fiber shaped product, according to an exemplary embodiment.
In the figure: 10-composite fiber molded product; 1-a fiber yarn; 1 a-fiber yarn one; 1 b-fiber yarn two; 1 c-fiber yarn three; 1 d-fiber yarn four; 1 e-fiber yarn five; 1 f-fiber yarn six; 1 g-fiber yarn seven; 2-resin; 3-fiber yarn interface; 3 a-fiber yarn interface one; 3 b-fiber yarn interface two; 3 c-fiber yarn interface three.
Detailed Description
In industrial fiber forming production, the continuous production length of the composite fiber forming product often reaches more than kilometers and far exceeds the fiber yarn length in a fiber yarn roll with a conventional specification, so that the condition that the fiber yarn roll is used up frequently occurs in fiber forming production, and the fiber yarn roll which is used up needs to be replaced at the moment, so that the replaced fiber yarn roll is connected with a fracture of the replaced fiber yarn roll in fiber forming production, and the fiber forming production can be continuously carried out. The interface of two fiber reels can have a certain influence on the composite fiber shaped product: the fiber yarn interface is not only easy to break, but also can increase the local diameter of the fiber yarn, so that the thickness of the fiber yarn is uneven.
Since fiber reels are generally of uniform gauge in industrial fiber forming production, their initial fiber yarn lengths are also nearly uniform. As shown in fig. 1, when a plurality of brand-new fiber reels are used at the beginning of the fiber molding production, the fiber yarn 1 of the fiber reels is used up simultaneously, so that a large number of fiber yarn interfaces 3 in the composite fiber molded product 10 are concentrated at one place, which not only causes problems such as surface wrinkles in the composite fiber molded product 10, but also reduces the strength of the composite fiber molded product 10, so that the composite fiber molded product is easy to break when being stressed, and the production quality of the composite fiber molded product 10 is seriously affected.
In view of this, the present invention provides a method for controlling composite fiber forming, when there are at least two fiber rolls with the same initial fiber yarn length in the used fiber rolls, after each predetermined length is produced, one fiber roll of the plurality of fiber rolls is replaced, and the initial fiber yarn length of the replaced fiber rolls is different from the current fiber yarn lengths of other fiber rolls in the fiber forming processing state, so that the condition that the plurality of fiber rolls are used up simultaneously can be avoided, or the fiber rolls with the same initial fiber yarn length and different initial fiber yarn lengths can be directly used at the beginning of the fiber forming production, so that the time when each fiber roll is used up in the fiber forming production is different, thereby dispersing all fiber yarn interfaces in the composite fiber forming product, effectively avoiding the condition that the fiber yarn interfaces are concentrated in a large amount, enabling the surface of the composite fiber forming product to be smooth and the strength to reach the standard, and ensuring the production quality of the composite fiber forming product.
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 will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention based on the embodiments of the present invention.
As shown in fig. 2, an exemplary embodiment of the present invention provides a method for controlling molding of a composite fiber, including the steps of:
step S110: providing a plurality of first fiber yarn rolls, wherein the initial fiber yarn lengths of at least two first fiber yarn rolls are the same;
step S210: performing fiber forming processing on the fiber yarns in the first fiber yarn rolls to produce a composite fiber formed product;
step S310: repeating the following steps until the fiber reels in the fiber molding processing state are all second fiber reels: after the composite fiber molded product is produced by a predetermined length, one of the plurality of first fiber reels is replaced with a second fiber reel, and the initial fiber yarn length of the second fiber reel is different from the current fiber yarn lengths of the other fiber reels in the fiber molding processing state.
For example, referring to fig. 2, in the method for controlling the formation of composite fibers according to the present embodiment, first, a plurality of first fiber reels are provided, and the first fiber reels are fiber reels used at the beginning of the production of fiber forming. The fiber yarn materials in the first fiber yarn rolls may be the same, for example, glass fibers, or may be different, for example, a part of the fiber yarns in the first fiber yarn rolls are glass fibers, and another part of the fiber yarns in the first fiber yarn rolls are carbon fibers, which is not limited in this embodiment.
Referring to fig. 1, when the fiber yarn 1 in the plurality of first fiber yarn rolls is subjected to the production of the composite fiber molded product 10 and the initial fiber yarn lengths of at least two first fiber yarn rolls are the same among the plurality of first fiber yarn rolls, the fiber yarn interfaces 3 are concentrated in a large amount if the at least two fiber yarn rolls are used up simultaneously by the conventional composite fiber molding control method. Accordingly, each time the composite fiber molded product 10 is produced to a predetermined length, one of the plurality of first fiber reels is replaced with a second fiber reel, and the replaced first fiber reel may be replaced by being used up or by being not used up but being actively cut by a machine or a man-made machine, so that the fracture of each first fiber reel is present at a different position.
As an example, as shown in fig. 5, five first fiber yarns are provided: fiber yarn one 1a, fiber yarn two 1b, fiber yarn three 1c, fiber yarn four 1d and fiber yarn five 1e, wherein the initial fiber yarn length of fiber yarn one 1a and fiber yarn five 1e is 20m, the initial fiber yarn length of fiber yarn two 1b is 30m, and the composite fiber molded product 10 is produced in the x direction. After 10m of the composite fiber shaped product 10 has been produced, the first fiber yarn 1a is cut off and replaced with a second fiber yarn package, at which point the first fiber yarn interface 3 in the composite fiber shaped product 10, i.e. the fiber yarn interface 3a, is present at 10 m. After the further production of the composite fiber molded product 10 for 10m, i.e. for a total of 20m, the fiber yarn five 1e is used up and replaced with a second fiber yarn package, at which time the second fiber yarn interface 3 in the composite fiber molded product 10, i.e. fiber yarn interface two 3b, occurs at 20 m. After the further production of the composite fibre shaped product 10 for 10m, i.e. for a total of 30m, the second fibre yarn 1b is used up and replaced with a second fibre yarn package, at which time the third fibre yarn interface 3 in the composite fibre shaped product 10, i.e. the fibre yarn interface three 3c, occurs at 30 m. Thereby, the fiber yarn interfaces 3 of the respective first fiber yarn rolls in the composite fiber molded product 10 can be dispersed.
When the first fiber yarn roll is replaced by the second fiber yarn roll, in order to reduce the condition that two fiber yarns are used up simultaneously in the subsequent fiber molding production as far as possible, the second fiber yarn roll with the initial fiber yarn length different from the current fiber yarn lengths of other fiber yarn rolls in the fiber molding processing state can be selected for replacement. As an example, as shown in fig. 5, the composite fiber molded product 10 is produced in the x direction, when the fiber yarn 1a is replaced with the fiber yarn six 1f, that is, when the composite fiber molded product 10 is produced by 10m, the other fiber yarn rolls in the fiber molding process state are the fiber yarn two 1b, the fiber yarn three 1c, the fiber yarn four 1d and the fiber yarn five 1e, the current fiber yarn lengths thereof are respectively 20m, 40m, 30m and 10m, and the initial fiber yarn length of the fiber yarn six 1f replaced at this time is 50m, so that the current fiber yarn lengths of all the fiber yarn rolls in the fiber molding process state are different when the fiber yarn six 1f is replaced, whereby the occurrence of the condition that the fiber yarn interface 3 is concentrated in the subsequent fiber molding process can be avoided.
By adopting the molding control method, the time when each fiber yarn roll is used up in the fiber molding production is different, so that each fiber yarn interface 3 in the composite fiber molding product 10 can be dispersed, the condition that the fiber yarn interfaces 3 are concentrated in a large amount is effectively avoided, the surface of the composite fiber molding product 10 is smooth, the strength reaches the standard, and the production quality of the composite fiber molding product 10 is ensured.
The predetermined lengths in step S310 may be set according to the production needs and the actual conditions in the production process, respectively. As an example, as shown in fig. 5, the respective predetermined lengths may be the same so that the respective fiber yarn interfaces 3 are uniformly dispersed in the extending direction of the composite fiber molded product 10 to minimize the influence of the plurality of fiber yarn interfaces 3 on the production quality of the composite fiber molded product 10. In other examples, the predetermined lengths may be different, for example, adaptively adjusted based on the current fiber yarn length of each fiber yarn package, to fully utilize the fiber yarn package and reduce fiber yarn package raw material loss.
With continued reference to fig. 5, in one embodiment, each predetermined length is greater than 1m, such that the vertical distance between each fiber yarn interface 3 in the composite fiber molded product 10 is greater than 1m. The fiber yarn interfaces 3 are kept far enough apart to provide the composite fiber molded product 10 with enough space to allow the uneven surface caused by the fiber yarn interfaces 3 to transition to a smooth surface. In one embodiment, as shown in fig. 5, when the predetermined length is greater than 1m, at most three fiber yarn rolls are replaced in each 10m of the fiber molding production, that is, at most three fiber yarn interfaces 3 appear in any 10m of the composite fiber molding product 10, so that the dispersion degree of each fiber yarn interface 3 in the composite fiber molding product 10 can be further enlarged, the condition that the fiber yarn interfaces 3 are not concentrated in a large amount in the composite fiber molding product 10 is ensured, and the strength of the composite fiber molding product 10 is greatly improved.
In the composite fiber molded product 10, as shown in fig. 6, the individual fiber yarns are arranged in a certain manner, for example, five fiber yarns are arranged in a straight line in a plate-like composite fiber molded product 10. The first fiber yarn rolls are arranged along the first direction, and when the first fiber yarn rolls are replaced by the second fiber yarn rolls, the first fiber yarn rolls are replaced sequentially from two sides to the middle of the first direction.
In an example, referring to fig. 5 and 6, five fiber yarns are arranged in a first direction (x and x' directions shown in fig. 6), two fiber yarns positioned at the two most ends in the first direction are fiber yarn one 1a and fiber yarn five 1e, two fiber yarns positioned adjacent to fiber yarn one 1a and fiber yarn five 1e in the middle direction along both sides of the first direction are fiber yarn two 1b and fiber yarn four 1d, respectively, and fiber yarn positioned in the middle is fiber yarn three 1c. When the first fiber yarn package is replaced, the replacement can be performed sequentially according to the sequence of 1a-1e-1b-1d-1c or 1e-1a-1d-1b-1c, so that the fiber yarn interfaces 3 are dispersed in the extending direction (x and x 'directions shown in fig. 5) of the composite fiber molded product 10, and the dispersion in the width direction (y and y' directions shown in fig. 5) of the composite fiber molded product 10 can be realized, and the phenomenon that when the composite fiber molded product 10 is stressed, the strength of two sides in the width direction is uneven, so that the side with weaker strength is broken is avoided. At the same time, the arrangement minimizes the number of fiber yarn interfaces 3 in the extending direction at the middle position on the cross section of the composite fiber molded product 10, and the middle part of the composite fiber molded product 10 has the highest strength, which is further advantageous for the strength balance.
In one embodiment, the initial fiber yarn length of each second fiber yarn roll is the same and greater than or equal to the initial fiber yarn length of the first fiber yarn roll having the longest initial fiber yarn length. As an example, as shown in fig. 5, the first fiber yarn roll having the longest initial fiber yarn length is fiber yarn three 1c, the fiber yarn length thereof is 50m, and when fiber yarn one 1a and fiber yarn two 1b are used up, the second fiber yarn roll to be replaced is fiber yarn six lf and fiber yarn seven 1g, respectively, and the lengths of fiber yarn six lf and fiber yarn seven 1g are equal and equal to 50m. The arrangement mode is adopted because the fiber reels often have uniform specifications in industrial fiber molding production, all the brand-new fiber reels have the same initial fiber yarn length, for example, 50m, when the fracture of each first fiber reel in the composite fiber molding product 10 is dispersed, only one brand-new second fiber reel is needed to be connected with the fracture of the first fiber reel, so that each fiber reel can be used up at different moments in subsequent fiber molding production respectively, and the operation steps of fiber molding production are greatly simplified without cutting off the fiber yarns by a machine or manually and actively, thereby being beneficial to improving the production efficiency and reducing the raw material loss.
According to different fiber yarn materials, different interface modes can be adopted when the fiber yarn rolls are replaced, so that the interface surface of the fiber yarn interface 3 is smoother and the connection is firmer. In an embodiment, the fiber yarns in the first fiber yarn roll and the second fiber yarn roll are thermosetting fiber yarns such as glass fibers, at the moment, the replaced second fiber yarn roll can be connected with the fracture of the replaced first fiber yarn roll in fiber forming production by using an air splicer, the air splicer utilizes compressed air jet to enable the fracture of the two fiber yarns to be reversely overlapped, and the fiber yarns are mutually doped, so that the fiber yarn connection is realized. In another embodiment, the fiber yarn in the first fiber yarn roll and the second fiber yarn roll is thermoplastic fiber yarn such as polypropylene fiber, at this time, the replaced second fiber yarn roll and the replaced first fiber yarn roll can be connected with the fracture of the fiber molding production by using a heating device, the fracture of the two fiber yarns can be softened and deformed and fused together by the heating device, and then the fiber yarn joint 3 is cooled, reinforced and shaped, so that the firm connection of the two fiber yarns can be realized.
In one embodiment, as shown in fig. 3, the method for controlling the molding of the composite fiber further includes the steps of:
step S410: when one second fiber yarn roll is used up, selecting one first fiber yarn roll from the replaced first fiber yarn rolls, and connecting the first fiber yarn roll with a fracture of the used second fiber yarn roll in fiber forming production; the selected first fiber yarn rolls are first fiber yarn rolls with the longest current fiber yarn length among all the first fiber yarn rolls which are different from the current fiber yarn lengths of other fiber yarn rolls in the fiber molding processing state.
When one second fiber yarn roll is used up, the fiber yarn roll can be continued to maintain continuous fiber forming production, wherein one of the plurality of first fiber yarn rolls which can be replaced in the previous fiber forming production is selected and connected with the fracture of the used second fiber yarn roll in the fiber forming production, so that the fiber yarn roll is fully utilized, and raw material waste is reduced. In one embodiment, one first fiber yarn roll is selected from all first fiber yarn rolls which are different from the current fiber yarn lengths of other fiber yarn rolls in the fiber forming processing state, so that all fiber yarn rolls in the fiber forming processing state can be used up at different moments, and furthermore, the first fiber yarn roll with the longest current fiber yarn length can be preferentially selected from the first fiber yarn rolls, so that the total number of fiber yarn interfaces 3 in the composite fiber forming product 10 is reduced as much as possible, and the influence caused by the fiber yarn interfaces 3 is reduced.
Of course, when one second fiber yarn package is exhausted, other fiber yarn packages other than the first fiber yarn package may be used for replacement, for example, a completely new fiber yarn package may be used, without limitation.
As shown in fig. 4, a method for controlling molding of a composite fiber according to an exemplary embodiment of the present invention includes the steps of:
step S120: providing a plurality of third fiber yarn rolls, wherein the initial fiber yarn lengths of the third fiber yarn rolls are different;
step S220: fiber yarns in the third plurality of fiber reels are subjected to a fiber forming process to produce a composite fiber formed product.
For example, referring to fig. 4, in the composite fiber molding control method provided in the present embodiment, first, a plurality of third fiber reels are provided, and initial fiber yarn lengths of the third fiber reels are different, where the third fiber reels are fiber reels used at the beginning of the fiber molding production.
As an example, as shown in fig. 5, five third fiber yarns are provided: fiber yarn one 1a, fiber yarn two 1b, fiber yarn three 1c, fiber yarn four 1d and fiber yarn five 1e, whose initial fiber yarn lengths are 10m, 30m, 50m, 40m and 20m, respectively, were produced in the x-direction, and composite fiber molded product 10 was produced. After 10m of the composite fiber shaped product 10 has been produced, the first fiber yarn 1a is used up and replaced with a second fiber yarn package, at which point the first fiber yarn interface 3 in the composite fiber shaped product 10, i.e. the fiber yarn interface 3a, is present at 10 m. After the further production of the composite fiber molded product 10 for 10m, i.e. for a total of 20m, the fiber yarn five 1e is used up and replaced with a second fiber yarn package, at which time the second fiber yarn interface 3 in the composite fiber molded product 10, i.e. fiber yarn interface two 3b, occurs at 20 m. After the composite fiber molded product 10 continues to be produced for 10m, i.e., 30m in total, the second fiber yarn 1b is used up and replaced with the second fiber yarn package, and at this time, the third fiber yarn interfaces 3 in the composite fiber molded product 10, i.e., the third fiber yarn interfaces 3c, appear at 30m … …, and so on, so that the dispersion of the fiber yarn interfaces 3 of each third fiber yarn package in the composite fiber molded product 10 can be achieved.
By adopting the molding control method, fiber yarn rolls with different initial fiber yarn lengths are provided at the beginning of fiber molding production, active cutting of the fiber yarn rolls by a machine or a human is not needed, and the time when each fiber yarn roll is used up in the fiber molding production is also different, so that each fiber yarn interface 3 in the composite fiber molding product 10 can be dispersed, the condition that the fiber yarn interfaces 3 are concentrated in a large amount is effectively avoided, the surface of the composite fiber molding product 10 is smooth, the strength reaches the standard, and the production quality of the composite fiber molding product 10 is ensured.
In order to maintain a sufficient distance between the fiber yarn interfaces 3, the composite fiber molded product 10 is provided with a sufficient space so that the uneven surface caused by the fiber yarn interfaces 3 can be transferred to a smooth surface, and the initial fiber yarn length difference of the third fiber yarn rolls can be appropriately increased. In one example, as shown in fig. 5, the initial fiber yarn lengths of each of the two third fiber yarn rolls differ by more than 1m, so that the vertical distance between the fiber yarn interfaces 3 in the composite fiber molded product 10 is more than 1m. In one embodiment, as shown in fig. 5, while the initial fiber yarn lengths of every two third fiber yarn rolls differ by more than 1m, the initial fiber yarn lengths of every four third fiber yarn rolls, i.e., the two third fiber yarn rolls with the longest initial fiber yarn length and the shortest initial fiber yarn length, may be further more than 10m, so that at most three fiber yarn interfaces 3 occur in any 10m of the composite fiber molding product 10, and the arrangement can further expand the dispersion degree of each fiber yarn interface 3 in the composite fiber molding product 10, ensure that the fiber yarn interfaces 3 are not concentrated in a large amount in the composite fiber molding product 10, and greatly improve the strength of the composite fiber molding product 10.
Since the position of the fiber yarn end 3 in the composite fiber molded product 10 also influences the strength balance of the composite fiber molded product 10 in the cross-sectional direction perpendicular to the extending direction thereof, the corresponding arrangement position of the respective third fiber yarn rolls having different initial fiber yarn lengths in the composite fiber molded product 10 also influences the production quality thereof. In an embodiment, the plurality of third fiber yarn packages are arranged along the second direction, and initial fiber yarn lengths of the third fiber yarn packages are gradually increased along a direction from two sides to the middle of the second direction.
In an example, referring to fig. 5 and 6, five fiber yarns are arranged in the second direction (x and x ' directions shown in fig. 6), two fiber yarns at the two most ends in the second direction are fiber yarn one 1a and fiber yarn five 1e, the initial fiber yarn lengths thereof are 10m and 20m, respectively, two fiber yarns adjacent to fiber yarn one 1a and fiber yarn five 1e in the middle direction along the two sides in the second direction are fiber yarn two 1b and fiber yarn four 1d, respectively, the initial fiber yarn lengths thereof are 30m and 40m, respectively, the fiber yarn at the middle is fiber yarn three 1c, and the initial fiber yarn lengths thereof are 50m, thereby enabling dispersion of each fiber yarn interface 3 not only in the extending direction (x and x ' directions shown in fig. 5) of the composite fiber molded product 10, but also enabling dispersion in the width direction (y and y ' directions shown in fig. 5) of the composite fiber molded product 10, avoiding breakage on the side with weaker strength at the two sides in the width direction when the composite fiber molded product 10 is stressed. At the same time, the arrangement minimizes the number of fiber yarn interfaces 3 in the extending direction at the middle position on the cross section of the composite fiber molded product 10, and the middle part of the composite fiber molded product 10 has the highest strength, which is further advantageous for the strength balance.
As shown in fig. 5 and 6, an exemplary embodiment of the present invention provides a composite fiber molded product 10, which is obtained by using the composite fiber molding control method according to any of the above embodiments, and the composite fiber molded product 10 includes a fiber yarn 1 and a resin 2. In the composite fiber molded product 10 obtained by the molding control method provided by the embodiment of the invention, the fiber yarn interfaces 3 are well dispersed in the extending direction, the surface of the composite fiber molded product 10 is smooth, the strength reaches the standard, and a powerful guarantee is provided for the subsequent application of the composite fiber molded product 10.
The embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present invention should not be construed as being limited to the specific forms set forth in the embodiments, but the scope of protection of the present invention also includes equivalent technical means that can be conceived by those skilled in the art according to the inventive concept.
Claims (10)
1. A composite fiber forming control method, characterized by comprising the steps of:
providing a plurality of first fiber yarn rolls, wherein the initial fiber yarn lengths of at least two first fiber yarn rolls are the same;
performing fiber forming processing on the fiber yarns in the first fiber yarn rolls to produce a composite fiber formed product;
repeating the following steps until the fiber reels in the fiber forming processing state are all the second fiber reels:
after the composite fiber molded product is produced by a preset length, one of the first fiber yarn rolls is replaced by a second fiber yarn roll, and the initial fiber yarn length of the second fiber yarn roll is different from the current fiber yarn lengths of other fiber yarn rolls in a fiber molding processing state.
2. The composite fiber formation control method according to claim 1, wherein the predetermined length is greater than 1m.
3. The method according to claim 1, wherein the plurality of first fiber reels are arranged in a first direction, and when the first fiber reels are replaced with second fiber reels, the first fiber reels are replaced in this order from both sides to a middle of the first direction.
4. The method according to claim 1, wherein the initial fiber yarn length of each of the second fiber yarn rolls is equal to or greater than the initial fiber yarn length of the first fiber yarn roll having the longest initial fiber yarn length.
5. The composite fiber formation control method according to any one of claims 1 to 4, wherein the replacing one of the plurality of first fiber reels with a second fiber reel includes:
the fiber yarns in the first fiber yarn roll and the second fiber yarn roll are thermosetting fiber yarns, and the replaced second fiber yarn roll is connected with the fracture of the replaced first fiber yarn roll in the fiber forming production by using an air splicer; or alternatively, the first and second heat exchangers may be,
the fiber yarns in the first fiber yarn roll and the second fiber yarn roll are thermoplastic fiber yarns, and the replaced second fiber yarn roll is connected with the fracture of the replaced first fiber yarn roll in the fiber forming production by using a heating device.
6. The composite fiber formation control method according to any one of claims 1 to 4, characterized in that the composite fiber formation control method further comprises:
when one of the second fiber reels is used up, selecting one of the first fiber reels to be replaced from among the plurality of first fiber reels, and connecting the first fiber reels with a fracture of the used second fiber reels in the fiber molding production;
the first fiber yarn rolls selected are the first fiber yarn rolls with the longest current fiber yarn length in all the first fiber yarn rolls which are different from the current fiber yarn lengths of other fiber yarn rolls in the fiber molding processing state.
7. A composite fiber forming control method, characterized by comprising the steps of:
providing a plurality of third fiber yarn rolls, wherein the initial fiber yarn lengths of the third fiber yarn rolls are different;
and performing fiber forming processing on the fiber yarns in the third fiber yarn rolls to produce a composite fiber forming product.
8. The method of claim 7, wherein the initial fiber yarn lengths of each of the two third fiber reels differ by more than 1m.
9. The method according to claim 7, wherein the plurality of third fiber yarn rolls are arranged in the second direction, and initial fiber yarn lengths of the third fiber yarn rolls are gradually increased in a direction from both sides to a middle of the second direction.
10. A composite fiber molded product obtained by the composite fiber molding control method according to any one of claims 1 to 6, or by the composite fiber molding control method according to any one of claims 7 to 9.
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| CN202410006634.1A CN117656543A (en) | 2024-01-03 | 2024-01-03 | Composite fiber forming control method and formed product thereof |
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| CN202410006634.1A CN117656543A (en) | 2024-01-03 | 2024-01-03 | Composite fiber forming control method and formed product thereof |
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