CN113815246A - Preparation method and preparation device of variable reinforcement hot-melt prepreg - Google Patents
Preparation method and preparation device of variable reinforcement hot-melt prepreg Download PDFInfo
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- CN113815246A CN113815246A CN202111367828.7A CN202111367828A CN113815246A CN 113815246 A CN113815246 A CN 113815246A CN 202111367828 A CN202111367828 A CN 202111367828A CN 113815246 A CN113815246 A CN 113815246A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
- B29C41/26—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length by depositing flowable material on a rotating drum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/504—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands
- B29C70/506—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands and impregnating by melting a solid material, e.g. sheet, powder, fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
Abstract
The invention relates to the technical field of composite materials, in particular to a preparation method and a preparation device of a variable reinforcement hot-melt prepreg; preparing an adhesive film, preparing lapping fiber cloth, stacking the adhesive film and the lapping fiber cloth to obtain a prefabricated variable reinforcement hot-melt prepreg, carrying out hot-pressing compounding by a hot-pressing roller to obtain the variable reinforcement hot-melt prepreg, cooling, compounding with a PE film, rolling and rolling for later use; the invention also provides a preparation device of the preparation method of the variable reinforcement hot-melt prepreg, which comprises a conveying roller, a glue tank, a hot-melt prepreg machine, a cooling system, a rolling roller, a rolling system and the like; the preparation method of the variable-reinforcement hot-melt prepreg provided by the invention can realize direct preparation of the variable-reinforcement hot-melt prepreg, one prepreg cloth is provided with different reinforcement materials, the prepreg cloth of the variable reinforcement is cut out in one step, the overlapping width of the reinforcement is accurately controlled, the working efficiency is effectively improved, and waste is avoided.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a preparation method and a preparation device of a variable reinforcement hot-melt prepreg.
Background
The conventional aircraft mostly adopts a circular section cabin section, while the hypersonic aircraft widely adopts a non-circular section cabin section, namely a special-shaped cabin section, and the heat protection requirements of different parts of the special-shaped cabin section are different, so that the reinforcing materials or resin matrixes of different parts are required to be different. The method is characterized in that at present, two kinds of prepreg cloth of different reinforcements are prepared, ablation-resistant high-silica cloth and the like are used as the reinforcements at positions with high heat-proof requirements of special-shaped cabin sections, low-density organic fiber cloth and the like are mainly used as the reinforcements at leeward sides with low heat-proof requirements, the two kinds of prepreg cloth are firstly prepared, the two kinds of prepreg cloth are respectively cut into required sizes and are manually overlapped and paved, but the overlapping allowance of the method is difficult to accurately control, the error is large, the waste is caused by repeated cutting, only single-reinforcement-reinforced hot-melt prepreg reports exist at present, and few reinforcement-reinforced hot-melt prepregs report.
Therefore, in order to solve the above problems, the present invention is urgently needed to provide a method for preparing a variable reinforcement hot-melt prepreg and a preparation device thereof.
Disclosure of Invention
The invention aims to provide a method and a device for preparing a variable-reinforcement hot-melt prepreg, which can directly prepare the variable-reinforcement hot-melt prepreg, one prepreg is provided with different reinforcement materials, and the prepreg of the variable reinforcement is cut out in one step according to the shape and the technical requirements of a product.
The invention provides a preparation method of a variable reinforcement hot-melt prepreg, which comprises the following steps:
s1, preparing a glue film;
s2, at least two pieces of reinforcement fiber cloth are transversely overlapped with each other, the adjacent two pieces of reinforcement fiber cloth are made of different materials, and overlapped fiber cloth is obtained according to the set overlapping width of the reinforcement fiber cloth which is overlapped with each other;
s3, stacking the adhesive film and the lapping fiber cloth to obtain a prefabricated variable reinforcement hot-melt prepreg;
s4, heating hot-pressing rollers in composite production equipment of the hot-melting pre-dipping machine, conveying the prefabricated variable reinforcement hot-melting prepreg between the upper hot-pressing roller and the lower hot-pressing roller, and performing hot-pressing compounding to obtain the variable reinforcement hot-melting prepreg;
wherein, the stacking sequence of the glue film and the lapping fiber cloth comprises that a layer of glue film is respectively placed at the upper part and the lower part, the lapping fiber cloth is placed at the middle part, or a layer of glue film is placed at the lower side, and the lapping fiber cloth is placed at the upper side.
Preferably, the variable reinforcement hot-melt prepreg is cooled, a PE film is arranged on the upper portion of the cooled variable reinforcement hot-melt prepreg, and the variable reinforcement hot-melt prepreg is rolled and rolled for standby.
Preferably, in the S1 step, the step of preparing the adhesive film includes:
heating the hot-melt phenolic resin, heating the hot-melt phenolic resin to be molten, wherein the heating temperature of the hot-melt phenolic resin is 70-90 ℃, and the heating time is 1-3 h;
pouring the hot-melt phenolic resin in a molten state into coating production equipment of a hot-melt pre-dipping machine, coating, and coating into a glue film with uniform thickness, wherein the coating temperature is 70-90 ℃; and adjusting the gap and the film coating speed of the coating roller, wherein the film coating speed is 3-10 m/min.
Preferably, in step S4, the adhesive film and the lapped fiber cloth are hot-pressed and compounded, the temperature of the hot-pressing roller is controlled to be 70 to 120 ℃, and the linear speed of the hot-pressing roller is controlled to be 3 to 10 m/min.
Preferably, the overlap width is 2-4 cm.
Preferably, the reinforcement fiber cloth is: quartz fiber cloth, aramid fiber cloth, glass fiber cloth, high silica fiber cloth, blended cloth woven from aramid fiber and quartz fiber, blended cloth woven from aramid fiber and glass fiber, blended cloth woven from polysulfonamide fiber and quartz fiber, or blended cloth woven from polysulfonamide fiber and glass fiber.
Preferably, the width of the fiber cloth of the reinforcement body is less than 60 cm.
Preferably, the width of the variable reinforcement hot melt prepreg is 100cm-120 cm.
The invention also provides a preparation device of the preparation method of the variable reinforcement hot-melt prepreg, which comprises a conveying roller, a hot-melt pre-dipping machine, a cooling system, a rolling roller and a winding system which are sequentially arranged and used for conveying the fiber cloth, wherein the hot-melt pre-dipping machine is connected with the glue tank;
the hot-melting pre-dipping machine comprises a coating production device and a composite production device which are connected in sequence; coating rollers which correspond to each other up and down are arranged in the coating production equipment, and hot pressing rollers which correspond to each other up and down are arranged in the composite production equipment.
Preferably, at least 4 groups of hot-pressing rollers which correspond up and down are arranged in the composite production equipment.
Compared with the prior art, the preparation method and the preparation device of the variable reinforcement hot-melt prepreg provided by the invention have the following advantages:
1. the invention provides a method for preparing a variable reinforcement hot-melt prepreg, which can realize direct preparation of the variable reinforcement hot-melt prepreg, one prepreg is provided with different reinforcement materials, the prepreg of the variable reinforcement is cut out in one step according to the shape and the technical requirements of a product, the overlapping width of the reinforcement can be accurately controlled, the working efficiency is effectively improved, and waste is avoided; the method has simple process and high production efficiency; according to the shape and technical requirements of the product.
2. The invention provides a preparation device of a variable reinforcement hot-melt prepreg preparation method, which is suitable for continuously producing the variable reinforcement hot-melt prepreg, can transversely lap-joint fiber cloth, can continuously and stably realize the overlapping of an adhesive film and the lapped fiber cloth, and can be hot-pressed into the variable reinforcement hot-melt prepreg.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic overlapping view of a variable reinforcement hot-melt prepreg of aramid fiber cloth/glass fiber cloth according to the present invention;
FIG. 2 is a schematic process diagram of a variable reinforcement hot-melt prepreg of aramid fiber cloth/glass fiber cloth according to the present invention;
FIG. 3 is an overlapped schematic view of a variable reinforcement hot-melt prepreg of aramid fiber cloth/quartz fiber cloth/aramid fiber cloth according to the present invention;
FIG. 4 is a schematic process diagram of a variable reinforcement hot-melt prepreg of aramid fiber cloth/quartz fiber cloth/aramid fiber cloth according to the present invention;
FIG. 5 is a schematic view of the overlapping of the variable reinforcement hot melt prepreg of the high silica fiber cloth/aramid fiber and glass fiber woven hybrid cloth/glass fiber cloth described in the present invention;
FIG. 6 is a schematic process diagram of a hybrid woven cloth of a variable reinforcement hot-melt prepreg of a high silica fiber cloth/aramid fiber and glass fiber woven hybrid woven cloth/glass fiber cloth according to the present invention;
FIG. 7 is an overlapped schematic view of the variable reinforcement hot melt prepreg of the blended fabric woven by aramid fibers and quartz fibers/polysulfonamide fibers and glass fibers/polysulfonamide fibers and quartz fibers in the invention;
fig. 8 is a schematic process diagram of the variable reinforcement hot melt prepreg of the hybrid fabric woven by aramid fibers and quartz fibers/polysulfonamide fibers and glass fibers/polysulfonamide fibers and quartz fibers in the invention.
The reference numbers are as follows:
1. reinforcement fiber cloth, 2, an overlapping area, 3, a reinforcement fiber cloth roller, 4, aramid fiber cloth, 5, glass fiber cloth, 6, an upper glue groove, 601, a lower glue groove, 7, a hot press roller, 8, a cooling system, 9, a rolling roller, 10, a PE film roller, 11, a rolling system, 12, a conveying roller, 13, a coating roller, 14, quartz fiber cloth, 15, blended woven cloth woven by aramid fiber and glass fiber, 16, high silica fiber cloth, 17, blended woven cloth woven by aramid fiber and quartz fiber, 18, blended woven cloth woven by polysulfonamide fiber and glass fiber, and 19, blended woven cloth woven by polysulfonamide fiber and quartz fiber.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 1 and fig. 2, the method and the device for preparing a variable reinforcement hot-melt prepreg provided by the invention comprise the following steps:
s1, preparing a glue film,
the preparation method of the adhesive film comprises the following steps:
heating the hot-melt phenolic resin for 3 hours, wherein the hot-melt phenolic resin is heated to be molten, and the heating temperature of the hot-melt phenolic resin is 70 ℃;
pouring the hot-melt phenolic resin in a molten state into coating production equipment of a hot-melt pre-dipping machine, coating to form a glue film with uniform thickness, wherein the coating temperature is 70 ℃; the gap between the coating rolls 13 and the coating speed were adjusted to 3 m/min.
S2, transversely overlapping different reinforcing body fiber cloths, transversely overlapping at least two reinforcing body fiber cloths, forming an overlapping area 2 according to the set overlapping width of the mutually overlapped reinforcing body fiber cloths, wherein the overlapping width is 4cm, and obtaining overlapped fiber cloths;
s3, stacking the adhesive film and the lapping fiber cloth to obtain a prefabricated variable reinforcement hot-melt prepreg;
s4, heating a hot pressing roller 7 in composite production equipment of the hot melting pre-dipping machine, and performing hot pressing composite on the adhesive film and the lapping fiber cloth, wherein the temperature of the hot pressing roller is controlled to be 70 ℃, and the linear speed of the hot pressing roller 7 is controlled to be 3 m/min; the stacking sequence of the glue film and the lapping fiber cloth is that a layer of glue film is respectively placed at the upper part and the lower part, the lapping fiber cloth is placed in the middle, or a layer of glue film is placed at the lower side, and the lapping fiber cloth is placed at the upper side; and conveying the prefabricated variable reinforcement hot-melt prepreg to a position between the upper hot pressing roller 7 and the lower hot pressing roller 7, and performing hot-pressing compounding to obtain the variable reinforcement hot-melt prepreg.
As shown in fig. 1, the reinforcing fiber cloth 1 is wound around a reinforcing fiber cloth roll 3, the width of the reinforcing fiber cloth 1 is less than 60cm, and the reinforcing fiber cloth 1 in this embodiment includes: aramid fiber cloth 4 with the width of 52cm and glass fiber cloth 5 with the width of 52cm is transversely lapped to obtain aramid fiber cloth/glass fiber cloth lapping cloth, an overlapping area 2 of the aramid fiber cloth/glass fiber cloth lapping cloth is provided, the overlapping width of the overlapping area 2 is 4cm, after the aramid fiber cloth/glass fiber cloth lapping cloth is subjected to up-down gluing and hot pressing, the variable reinforcement hot melt prepreg of the aramid fiber cloth/glass fiber cloth is obtained, and the total width of the variable reinforcement hot melt prepreg of the aramid fiber cloth/glass fiber cloth is 100 cm.
The variable reinforcement hot-melt prepreg of the aramid fiber cloth/glass fiber cloth is cooled, a PE film is arranged on the upper portion of the variable reinforcement hot-melt prepreg of the cooled aramid fiber cloth/glass fiber cloth, and then the variable reinforcement hot-melt prepreg is rolled by a rolling roller 9 and rolled for later use.
The invention provides a method for directly preparing a variable reinforcement hot-melt prepreg, wherein different reinforcement materials are arranged on a prepreg cloth, and the method comprises the following steps: the aramid fiber cloth and the glass fiber cloth are transversely lapped and are arranged according to the shape and the technical requirements of a product, the prepreg cloth of the variable reinforcement can be cut out in one step, and the working efficiency is effectively improved and the waste is avoided by accurately controlling the overlapping width of the reinforcement; the method has simple process and high production efficiency.
As shown in fig. 2, the present invention further provides a device for preparing a variable reinforcement hot-melt prepreg, which comprises a conveying roller 12 for sequentially conveying fiber cloth, two reinforcement fiber cloth rollers 3 connected to the front end of the conveying roller 12 and respectively wound with aramid fiber cloth 4 and glass fiber cloth 5, and a hot-press roller 7 arranged in a composite production facility of a hot-melt prepreg machine, wherein the rear end of the conveying roller 12 conveys the overlapped fiber cloth of the aramid fiber cloth 4 and the glass fiber cloth 5 to a coating roller 13 in the coating production facility of the hot-melt prepreg machine, and the hot-melt prepreg machine comprises: the production method comprises the steps of arranging coating roller 13 coating production equipment and hot pressing roller 7 composite production equipment, inputting the materials into a cooling system 8, laying a PE film on the variable reinforcement hot-melt prepreg of aramid fiber cloth/glass fiber cloth through a PE film roller 10, rolling the materials by a rolling roller 9, and then winding the materials in a winding system 11 for standby use, wherein a hot-melt prepreg machine is connected with an upper glue groove 6 and a lower glue groove 601; coating rollers 13 which correspond to each other up and down are arranged in the coating production equipment, hot pressing rollers 7 which correspond to each other up and down are arranged in the composite production equipment, and 4 groups of hot pressing rollers 7 which correspond to each other up and down are arranged in the composite production equipment.
What this embodiment obtained is aramid fiber cloth/glass fiber cloth becomes reinforcement hot melt preimpregnation material, provides aramid fiber cloth/glass fiber cloth's the preparation facilities that becomes reinforcement hot melt preimpregnation material simultaneously, is applicable to continuous production and becomes reinforcement hot melt preimpregnation material, can with the horizontal overlap joint of fiber cloth, can be continuous stable realization glued membrane, overlap joint fiber cloth's the stack to hot pressing becomes reinforcement hot melt preimpregnation material.
Example two
As shown in fig. 3 and 4, the method for preparing a variable reinforcement hot-melt prepreg provided by the invention comprises the following steps:
s1, preparing a glue film,
the preparation method of the adhesive film comprises the following steps:
heating the hot-melt phenolic resin, heating the hot-melt phenolic resin to be molten, wherein the heating temperature of the hot-melt phenolic resin is 90 ℃, and the heating time is 1 h;
pouring the hot-melt phenolic resin in a molten state into coating production equipment of a hot-melt pre-dipping machine, coating to form a glue film with uniform thickness, wherein the coating temperature is 90 ℃; the gap between the coating rolls and the coating speed were adjusted to 10 m/min.
S2, transversely overlapping different reinforcement fiber cloths, transversely overlapping at least two reinforcement fiber cloths, and obtaining overlapped fiber cloths according to the set overlapping width of the mutually overlapped reinforcement fiber cloths, wherein the overlapping width is 2 cm;
s3, stacking the adhesive film and the lapping fiber cloth to obtain a prefabricated variable reinforcement hot-melt prepreg;
s4, heating a hot pressing roller in composite production equipment of the hot melting pre-dipping machine, and performing hot pressing composite on the adhesive film and the lapping fiber cloth, wherein the control temperature of the hot pressing roller is 120 ℃, and the linear speed of the hot pressing roller is controlled at 10 m/min; the stacking sequence of the glue film and the lapping fiber cloth is that a layer of glue film is respectively placed at the upper part and the lower part, the lapping fiber cloth is placed in the middle, or a layer of glue film is placed at the lower side, and the lapping fiber cloth is placed at the upper side; and conveying the prefabricated variable reinforcement hot-melt prepreg to a position between the upper hot pressing roller and the lower hot pressing roller, and performing hot-pressing compounding to obtain the variable reinforcement hot-melt prepreg.
As shown in fig. 3, the reinforcing fiber cloth 1 is wound around the reinforcing fiber cloth roll 3, the width of the reinforcing fiber cloth 1 is less than 60cm, and in this embodiment, the reinforcing fiber cloth 1 shown in fig. 3 sequentially includes: the width of the aramid fiber cloth 4 is 31cm, the width of the quartz fiber cloth 14 is 32cm, the width of the aramid fiber cloth 4 is 41cm, the aramid fiber cloth/quartz fiber cloth/aramid fiber cloth overlapping cloth is obtained, the overlapping area 2 of the aramid fiber cloth/quartz fiber cloth/aramid fiber cloth overlapping cloth is 2cm, the overlapping width of the overlapping area 2 is 2cm, the aramid fiber cloth/quartz fiber cloth/aramid fiber cloth overlapping cloth is subjected to up-down gluing and hot pressing, and the total width of the variable reinforcement hot melt prepreg of the aramid fiber cloth/quartz fiber cloth/aramid fiber cloth is 100 cm.
The method comprises the following steps of cooling the variable reinforcement hot-melt prepreg of the aramid fiber cloth/quartz fiber cloth/aramid fiber cloth, arranging a PE film on the upper part of the variable reinforcement hot-melt prepreg of the cooled aramid fiber cloth/quartz fiber cloth/aramid fiber cloth, and then rolling and rolling for later use.
The invention provides a method for directly preparing a variable reinforcement hot-melt prepreg, wherein different reinforcement materials are arranged on a prepreg cloth, and the method comprises the following steps: the lapping mode is transverse lapping of the aramid fiber cloth/the quartz fiber cloth/the aramid fiber cloth, the lapping mode is set according to the shape and the technical requirements of a product, the prepreg cloth of the variable reinforcement can be cut out in one step, and the working efficiency is effectively improved and waste is avoided by accurately controlling the overlapping width of the reinforcement; the method has simple process and high production efficiency.
As shown in fig. 4, the invention further provides a preparation device of a method for preparing a variable reinforcement hot-melt prepreg, which comprises sequentially arranged conveying rollers 12 for conveying fiber cloth, wherein the front ends of the conveying rollers 12 are connected with three reinforcement fiber cloth rollers 3, which are respectively wound with aramid fiber cloth 4, quartz fiber cloth 14 and aramid fiber cloth 4, and the rear ends of the two conveying rollers 12 convey overlapped fiber cloth of the aramid fiber cloth/quartz fiber cloth/aramid fiber cloth to a coating roller 13 in a coating production device of a hot-melt prepreg machine and then to a hot-press roller 7 in a composite production device of the hot-melt prepreg machine, wherein the hot-melt prepreg machine comprises: the production method comprises the steps of arranging coating roller 13 coating production equipment and hot pressing roller 7 composite production equipment, inputting the materials into a cooling system 8, laying a PE film on the variable reinforcement hot-melt prepreg of aramid fiber cloth/glass fiber cloth through a PE film roller 10, rolling the materials by a rolling roller 9, and then winding the materials in a winding system 11 for standby use, wherein a hot-melt prepreg machine is connected with an upper glue groove 6 and a lower glue groove 601; coating rollers 13 which correspond to each other up and down are arranged in the coating production equipment, hot pressing rollers 7 which correspond to each other up and down are arranged in the composite production equipment, and 4 groups of hot pressing rollers 7 which correspond to each other up and down are arranged in the composite production equipment.
What this embodiment obtained is aramid fiber cloth/quartz fiber cloth/aramid fiber cloth becomes reinforcement hot melt preimpregnation material, provides aramid fiber cloth/quartz fiber cloth/aramid fiber cloth's the preparation facilities that becomes reinforcement hot melt preimpregnation material simultaneously, is applicable to continuous production and becomes reinforcement hot melt preimpregnation material, can become the horizontal overlap joint of fiber cloth, realization glued membrane that can be continuous and stable, the stack of overlap joint fiber cloth to hot pressing system becomes reinforcement hot melt preimpregnation material.
EXAMPLE III
As shown in fig. 5 and 6, the method and device for preparing a variable reinforcement hot-melt prepreg provided by the invention comprise the following steps:
s1, preparing a glue film,
the preparation method of the adhesive film comprises the following steps:
heating the hot-melt phenolic resin for 2 hours, wherein the hot-melt phenolic resin is heated to be molten, and the heating temperature of the hot-melt phenolic resin is 80 ℃;
pouring the hot-melt phenolic resin in a molten state into coating production equipment of a hot-melt pre-dipping machine, coating to form a glue film with uniform thickness, wherein the coating temperature is 80 ℃; the gap between the coating rolls and the coating speed were adjusted to 6 m/min.
S2, transversely overlapping different reinforcement fiber cloths, transversely overlapping and overlapping four reinforcement fiber cloths, and obtaining overlapped fiber cloths according to the set overlapping width of the mutually overlapped reinforcement fiber cloths, wherein the overlapping width is 2 cm;
s3, stacking the adhesive film and the lapping fiber cloth to obtain a prefabricated variable reinforcement hot-melt prepreg;
s4, heating a hot pressing roller in composite production equipment of the hot melting pre-dipping machine, and performing hot pressing composite on the adhesive film and the lapping fiber cloth, wherein the control temperature of the hot pressing roller is 100 ℃, and the linear speed of the hot pressing roller is controlled at 6 m/min; the stacking sequence of the glue film and the lapping fiber cloth is that a layer of glue film is respectively placed at the upper part and the lower part, the lapping fiber cloth is placed in the middle, or a layer of glue film is placed at the lower side, and the lapping fiber cloth is placed at the upper side; and conveying the prefabricated variable reinforcement hot-melt prepreg to a position between the upper hot pressing roller and the lower hot pressing roller, and performing hot-pressing compounding to obtain the variable reinforcement hot-melt prepreg.
As shown in fig. 5, the reinforcing fiber cloth 1 is wound around the reinforcing fiber cloth roll 3, the width of the reinforcing fiber cloth 1 is less than 60cm, and in this embodiment, the reinforcing fiber cloth 1 shown in fig. 5 sequentially includes: the high-silica fiber cloth 16 is 21cm in width, the aramid fiber cloth 4 is 32cm in width, the blended cloth 15 woven by aramid fibers and glass fibers is 42cm in width, the glass fiber cloth 5 is 31cm in width, the overlapped cloth of the high-silica fiber cloth/aramid fibers and glass fibers is formed after transverse overlapping, 3 overlapping areas 2 are arranged on the overlapped cloth of the high-silica fiber cloth/aramid fibers and glass fibers, the overlapping width of each overlapping area 2 is 2cm, the variable reinforcement hot-melt body of the high-silica fiber cloth/aramid fibers/glass fibers woven blended cloth/glass fibers cloth is obtained after gluing and hot pressing of the upper part and the lower part of the high-silica fiber cloth/aramid fibers/glass fibers woven blended cloth/glass fibers woven cloth A prepreg having a total width of 120 cm.
Cooling the variable reinforcement hot-melt prepreg of the high-silica fiber cloth/aramid fiber and glass fiber woven mixed woven cloth/glass fiber cloth, arranging a PE film on the upper part of the variable reinforcement hot-melt prepreg of the cooled high-silica fiber cloth/aramid fiber and glass fiber woven mixed woven cloth/glass fiber cloth, and then rolling and rolling for later use.
The invention provides a method for directly preparing a variable reinforcement hot-melt prepreg, wherein different reinforcement materials are arranged on a prepreg cloth, and the method comprises the following steps: the lapping mode is that the aramid fiber cloth, the high silica fiber cloth, the glass fiber cloth, the aramid fiber and the glass fiber woven mixed woven cloth are transversely lapped, the lapping mode is set according to the product shape and the technical requirements, the prepreg cloth of the variable reinforcement body can be cut out in one step, and the working efficiency is effectively improved and the waste is avoided by accurately controlling the overlapping width of the reinforcement body; the method has simple process and high production efficiency.
As shown in fig. 6, the present invention further provides a device for preparing a variable reinforcement hot-melt prepreg, which comprises four conveyor rollers 12 arranged for conveying fiber cloth, four reinforcement fiber cloth rollers 3 connected to the front ends of the conveyor rollers 12, a hybrid fabric 15 respectively wound with aramid fiber cloth 4, high silica fiber cloth 16, glass fiber cloth 5, and a hybrid fabric woven by aramid fiber and glass fiber, and two conveyor rollers 12, the rear ends of which convey the overlapped fiber cloth of the hybrid fabric woven by high silica fiber cloth/aramid fiber and glass fiber to a coating roller 13 in a coating production device of a hot-melt prepreg machine and then to a hot-press roller 7 in a composite production device of the hot-melt prepreg machine, wherein the hot-melt prepreg machine comprises: the production method comprises the steps of arranging coating roller 13 coating production equipment and hot pressing roller 7 composite production equipment, inputting the coating equipment and the hot pressing roller into a cooling system 8, paving a PE film on a variable reinforcement hot-melt prepreg of high silica fiber cloth/aramid fiber and glass fiber woven mixed woven cloth/glass fiber cloth through a PE film roller 10, rolling the PE film by a rolling roller 9, then rolling the PE film in a rolling system 11 for standby application, and connecting a hot-melt prepreg machine with an upper glue groove 6 and a lower glue groove 601; coating rollers 13 which correspond to each other up and down are arranged in the coating production equipment, hot pressing rollers 7 which correspond to each other up and down are arranged in the composite production equipment, and 4 groups of hot pressing rollers 7 which correspond to each other up and down are arranged in the composite production equipment.
What this embodiment obtained is that high silica fiber cloth/aramid fiber and glass fiber weave's mixed fabric/glass fiber cloth become reinforcement hot melt prepreg, the preparation facilities that become reinforcement hot melt prepreg of the mixed fabric/glass fiber cloth that high silica fiber cloth/aramid fiber and glass fiber weave is provided simultaneously, be applicable to continuous production and become reinforcement hot melt prepreg, can be with the horizontal overlap joint of fiber cloth, realization glued membrane that can be continuous and stable, the stack of overlap joint fiber cloth, and hot pressing becomes reinforcement hot melt prepreg.
Example four
As shown in fig. 7 and 8, the method and device for preparing a variable reinforcement hot-melt prepreg provided by the invention comprise the following steps:
s1, preparing a glue film,
the preparation method of the adhesive film comprises the following steps:
heating the hot-melt phenolic resin, heating the hot-melt phenolic resin to be molten, wherein the heating temperature of the hot-melt phenolic resin is 78 ℃, and the heating time is 2 hours;
pouring the hot-melt phenolic resin in a molten state into coating production equipment of a hot-melt pre-dipping machine, coating to form a glue film with uniform thickness, wherein the coating temperature is 78 ℃; the gap between the coating rolls and the coating speed were adjusted to 6 m/min.
S2, transversely overlapping different reinforcement fiber cloths, transversely overlapping and overlapping the three reinforcement fiber cloths, wherein the overlapping width is 2cm according to the set overlapping width of the mutually overlapped reinforcement fiber cloths to obtain overlapped fiber cloths;
s3, stacking the adhesive film and the lapping fiber cloth to obtain a prefabricated variable reinforcement hot-melt prepreg;
s4, heating a hot pressing roller in composite production equipment of the hot melting pre-dipping machine, and performing hot pressing composite on the adhesive film and the lapping fiber cloth, wherein the control temperature of the hot pressing roller is 100 ℃, and the linear speed of the hot pressing roller is controlled at 6 m/min; the stacking sequence of the glue film and the lapping fiber cloth is that a layer of glue film is respectively placed at the upper part and the lower part, the lapping fiber cloth is placed in the middle, or a layer of glue film is placed at the lower side, and the lapping fiber cloth is placed at the upper side; and conveying the prefabricated variable reinforcement hot-melt prepreg to a position between the upper hot pressing roller and the lower hot pressing roller, and performing hot-pressing compounding to obtain the variable reinforcement hot-melt prepreg.
As shown in fig. 7, the reinforcing fiber cloth 1 is wound around the reinforcing fiber cloth roll 3, the width of the reinforcing fiber cloth 1 is less than 60cm, and in this embodiment, the reinforcing fiber cloth 1 shown in fig. 5 sequentially includes: a mixed woven cloth 17 woven by aramid fibers and quartz fibers, which has a width of 31cm, a mixed woven cloth 18 woven by polysulfonamide fibers and glass fibers, which has a width of 32cm, a mixed woven cloth 19 woven by polysulfonamide fibers and quartz fibers, which has a width of 41cm, and which is transversely overlapped to form a mixed woven cloth woven by aramid fibers and quartz fibers/a mixed woven cloth woven by polysulfonamide fibers and glass fibers/an overlapped cloth woven by polysulfonamide fibers and quartz fibers, which is provided with two overlapping regions 2, wherein the overlapping widths of the overlapping regions 2 are both 2cm, the upper and lower parts of the overlapped cloth woven by aramid fibers and quartz fibers, the upper part and the lower part of the mixed woven cloth woven by polysulfonamide fibers and glass fibers/the mixed woven cloth woven by polysulfonamide fibers and quartz fibers are coated with glue, After hot pressing, the variable reinforcement hot melt prepreg of the mixed woven cloth of aramid fiber and quartz fiber/polysulfonamide fiber and glass fiber/polysulfonamide fiber and quartz fiber is obtained, and the total width of the variable reinforcement hot melt prepreg is 100 cm.
Cooling the variable reinforcement hot melt prepreg of the mixed woven cloth woven by aramid fibers and quartz fibers/the mixed woven cloth woven by aramid fibers and glass fibers/the mixed woven cloth woven by aramid fibers and quartz fibers, arranging a PE film on the upper part of the cooled variable reinforcement hot melt prepreg of the mixed woven cloth woven by aramid fibers and quartz fibers/the mixed woven cloth woven by aramid fibers and quartz fibers, and rolling for later use.
The invention provides a method for directly preparing a variable reinforcement hot-melt prepreg, wherein different reinforcement materials are arranged on a prepreg cloth, and the method comprises the following steps: the lapping mode is that the blended fabric weaved by aramid fiber and quartz fiber, the blended fabric weaved by polysulfonamide fiber and glass fiber, and the blended fabric weaved by polysulfonamide fiber and quartz fiber are transversely lapped, and the lapping mode is set according to the shape and the technical requirements of a product, so that the prepreg fabric of the variable reinforcement can be cut out in one step, and the working efficiency is effectively improved and the waste is avoided by accurately controlling the overlapping width of the reinforcement; the method has simple process and high production efficiency.
As shown in fig. 8, the present invention further provides a device for preparing a variable reinforcement hot melt prepreg, which comprises a conveying roller 12 arranged for conveying fiber cloth, three reinforcement fiber cloth rollers 3 connected to the front end of the conveying roller 12, a blended fabric 17 woven from aramid fibers and quartz fibers, a blended fabric 18 woven from polysulfonamide fibers and glass fibers, a blended fabric 19 woven from polysulfonamide fibers and quartz fibers, and a hot press roller 7 arranged at the rear end of the two conveying rollers 12 for conveying overlapped fiber cloths of the blended fabric woven from aramid fibers and quartz fibers, the blended fabric woven from polysulfonamide fibers and glass fibers, the blended fabric woven from polysulfonamide fibers and quartz fibers, the blended fabric woven from polysulfonamide fibers and glass fibers, the blended fabric woven from polysulfonamide fibers and quartz fibers to a coating roller 13 in a coating production facility of a hot melt prepreg machine, wherein the hot melt prepreg machine comprises: the production equipment is provided with a coating roller 13 and a hot-pressing roller 7, and then the production equipment is input into a cooling system 8, a PE film is laid on the variable reinforcement hot-melt prepreg of the mixed woven cloth woven by aramid fiber and quartz fiber, the polysulfonamide fiber and glass fiber, the mixed woven cloth woven by polysulfonamide fiber and quartz fiber, the PE film is rolled by a rolling roller 9 and then enters a rolling system 11 for rolling for standby, and a hot-melt pre-dipping machine is connected with an upper glue tank 6 and a lower glue tank 601; coating rollers 13 which correspond to each other up and down are arranged in the coating production equipment, hot pressing rollers 7 which correspond to each other up and down are arranged in the composite production equipment, and 4 groups of hot pressing rollers 7 which correspond to each other up and down are arranged in the composite production equipment.
The variable reinforcement hot melt prepreg is suitable for continuously producing the variable reinforcement hot melt prepreg, can transversely lap the fiber cloth, can continuously and stably realize the overlapping of an adhesive film and lapped fiber cloth, and can be prepared into the variable reinforcement hot melt prepreg by hot pressing.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for preparing a variable reinforcement hot-melt prepreg is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing a glue film;
s2, transversely overlapping at least two reinforcing body fiber cloths, wherein the two adjacent reinforcing body fiber cloths are made of different materials, and overlapping fiber cloths are obtained according to the set overlapping width of the mutually overlapped reinforcing body fiber cloths;
s3, stacking the adhesive film and the lapping fiber cloth to obtain a prefabricated variable reinforcement hot-melt prepreg;
s4, heating hot-pressing rollers in composite production equipment of the hot-melting pre-dipping machine, conveying the prefabricated variable reinforcement hot-melting prepreg between the upper hot-pressing roller and the lower hot-pressing roller, and performing hot-pressing compounding to obtain the variable reinforcement hot-melting prepreg;
wherein, the stacking sequence of the glue film and the lapping fiber cloth comprises that a layer of glue film is respectively placed at the upper part and the lower part, the lapping fiber cloth is placed at the middle part, or a layer of glue film is placed at the lower side, and the lapping fiber cloth is placed at the upper side.
2. The method for preparing the variable reinforcement hot-melt prepreg according to claim 1, wherein the method comprises the following steps: and cooling the variable reinforcement hot-melt prepreg, arranging a PE film on the upper part of the cooled variable reinforcement hot-melt prepreg, and rolling for later use.
3. The method for preparing the variable reinforcement hot-melt prepreg according to claim 1, wherein the method comprises the following steps: in the S1 step, the step of preparing the adhesive film includes:
heating the hot-melt phenolic resin, heating the hot-melt phenolic resin to be molten, wherein the heating temperature of the hot-melt phenolic resin is 70-90 ℃, and the heating time is 1-3 h;
pouring the hot-melt phenolic resin in a molten state into coating production equipment of a hot-melt pre-dipping machine, coating, and coating into a glue film with uniform thickness, wherein the coating temperature is 70-90 ℃; and adjusting the gap and the film coating speed of the coating roller, wherein the film coating speed is 3-10 m/min.
4. The method for preparing the variable reinforcement hot-melt prepreg according to claim 1, wherein the method comprises the following steps: and step S4, performing hot-pressing compounding on the adhesive film and the lapping fiber cloth, wherein the control temperature of the hot-pressing roller is 70-120 ℃, and the linear speed of the hot-pressing roller is controlled at 3-10 m/min.
5. The method for preparing the variable reinforcement hot-melt prepreg according to claim 1, wherein the method comprises the following steps: the overlap width is 2-4 cm.
6. The method for preparing the variable reinforcement hot-melt prepreg according to claim 1, wherein the method comprises the following steps: the fiber cloth of the reinforcement is: quartz fiber cloth, aramid fiber cloth, glass fiber cloth, high silica fiber cloth, blended cloth woven from aramid fiber and quartz fiber, blended cloth woven from aramid fiber and glass fiber, blended cloth woven from polysulfonamide fiber and quartz fiber, or blended cloth woven from polysulfonamide fiber and glass fiber.
7. The method for preparing the variable reinforcement hot-melt prepreg according to claim 1, wherein the method comprises the following steps: the width of the reinforcing fiber cloth is less than 60 cm.
8. The method for preparing the variable reinforcement hot-melt prepreg according to claim 1, wherein the method comprises the following steps: the width of the variable reinforcement hot-melt prepreg is 100cm-120 cm.
9. A production apparatus based on the method for producing a variable reinforcement hot-melt prepreg according to any one of claims 1 to 8, characterized in that: the device comprises sequentially arranged conveying rollers for conveying fiber cloth, a hot melting pre-dipping machine, a cooling system, a rolling roller and a winding system, wherein the hot melting pre-dipping machine is connected with a glue tank;
the hot-melting pre-dipping machine comprises a coating production device and a composite production device which are connected in sequence; coating rollers which correspond to each other up and down are arranged in the coating production equipment, and hot pressing rollers which correspond to each other up and down are arranged in the composite production equipment.
10. The manufacturing apparatus according to claim 9, characterized in that: at least 4 groups of hot-pressing rollers which correspond up and down are arranged in the composite production equipment.
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