CN114889172A - Self-adaptive rubber retaining strip for molding ultra-thick composite material part and using method - Google Patents
Self-adaptive rubber retaining strip for molding ultra-thick composite material part and using method Download PDFInfo
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- CN114889172A CN114889172A CN202210822993.5A CN202210822993A CN114889172A CN 114889172 A CN114889172 A CN 114889172A CN 202210822993 A CN202210822993 A CN 202210822993A CN 114889172 A CN114889172 A CN 114889172A
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- unvulcanized rubber
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 238000000465 moulding Methods 0.000 title claims abstract description 14
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 44
- 239000004917 carbon fiber Substances 0.000 claims abstract description 44
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 44
- 230000000903 blocking effect Effects 0.000 claims abstract description 36
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000013329 compounding Methods 0.000 claims abstract description 5
- 239000003292 glue Substances 0.000 claims description 30
- 230000007704 transition Effects 0.000 claims description 23
- 230000003044 adaptive effect Effects 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims 2
- 239000011347 resin Substances 0.000 abstract description 7
- 229920005989 resin Polymers 0.000 abstract description 7
- 239000002390 adhesive tape Substances 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 4
- 238000004073 vulcanization Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 9
- 239000002994 raw material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
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Classifications
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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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a self-adaptive rubber blocking strip for molding of an ultra-thick composite material part and a using method thereof, relates to the technical field of composite material processing, and solves the technical problems of resin loss and edge collapse easily occurring in the molding process of the existing ultra-thick composite material part. The self-adaptive rubber retaining strip is formed by embedding a thin carbon fiber laminated board and a carbon fiber prepreg in an unvulcanized rubber sheet in a compounding mode, and the thin carbon fiber laminated board and the carbon fiber prepreg are distributed on two sides of the unvulcanized rubber sheet. The self-adaptive glue-blocking strip reinforced by the thin carbon fiber laminated board and the carbon fiber prepreg can be hardened at a high temperature and a high pressure, has higher rigidity than pure rubber, is not easy to bend or collapse, and can better provide support for the edge of a blank of a workpiece. Compare in traditional vulcanization and keep off the adhesive tape, the self-adaptation of this application keeps off the adhesive tape and need not to do other processings in the type in-process of enclosing, many places concatenation department, can heal up by oneself under high temperature high pressure.
Description
Technical Field
The invention relates to the technical field of composite material processing, in particular to a self-adaptive rubber retaining strip for forming an ultra-thick composite material part and a using method thereof.
Background
The super-thick composite material part is a special member in a composite material structural part, the thickness of a common composite material part is below 7mm, and the super-thick composite material part is used for transferring load to a main bearing structure, and the super-thick composite material part can be directly used for the main bearing structure and is used for bearing larger load, such as areas of a wing main bearing beam, a bearing belt plate and the like. However, as the thickness of the composite material product increases, the edge effect of the blank of the composite material product becomes more and more obvious, and in the prior art, vulcanized rubber or unvulcanized rubber is mostly placed at the edge of the blank to prevent the resin in the blank of the product from losing.
However, with the increase of the thickness of the blank, the vulcanization glue blocking strip has the inherent defect of low rigidity, and is easy to incline, slide and the like, so that the edge effect cannot be completely solved. The unvulcanized glue blocking strip has the problems of large hot melting, large deformation in the heating process and the like, so that the edge of a blank of a product is easy to collapse in the forming process, and a large amount of resin is lost. In addition, in order to avoid the influence of the edge effect on the product, a method of widening the margin area is usually adopted in the process to reduce or avoid the influence of the edge effect on the product, which may result in a reduction in the utilization rate of raw materials and a substantial increase in the cost.
Disclosure of Invention
The invention aims to provide a self-adaptive glue retaining strip for molding an ultra-thick composite material part and a using method thereof, and aims to solve the technical problems that resin is easy to lose and the edge is easy to collapse in the molding process of the ultra-thick composite material part in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a self-adaptive rubber retaining strip for molding of an ultra-thick composite material part, which is formed by embedding a thin carbon fiber laminated board and a carbon fiber prepreg in an unvulcanized rubber sheet and compounding, wherein the thin carbon fiber laminated board and the carbon fiber prepreg are distributed on two sides of the unvulcanized rubber sheet.
According to a preferred embodiment, the adaptive glue barrier comprises a conformal region, a transition region and a reinforcing region, wherein the transition region is located between the conformal region and the reinforcing region,
the conformal area is formed by embedding the thin carbon fiber laminated board in the unvulcanized rubber sheet; the transition area is formed by the unvulcanized rubber sheet, and the reinforcing area is formed by embedding the carbon fiber prepreg in the unvulcanized rubber sheet.
According to a preferred embodiment, the sheet carbon fiber laminate is embedded in the unvulcanized rubber sheet with its longitudinal direction parallel to the longitudinal direction of the unvulcanized rubber sheet.
According to a preferred embodiment, the thin carbon fiber laminate has a thickness of less than 1 mm.
According to a preferred embodiment, the width of the transition zone is 3mm to 15 mm.
According to a preferred embodiment, the carbon fiber prepreg is embedded in the unvulcanized rubber sheet in a manner that the longitudinal direction of the carbon fiber prepreg is parallel to the longitudinal direction of the unvulcanized rubber sheet.
According to a preferred embodiment, at least two layers of fiber cloth are arranged in the unvulcanized rubber sheet in the transition area, and the fiber cloth is embedded in the unvulcanized rubber sheet in a manner that the length direction of the fiber cloth is parallel to the length direction of the unvulcanized rubber sheet.
The invention also provides a using method of the self-adaptive rubber retaining strip, which comprises the following steps:
pre-pressing the self-adaptive glue blocking strip into an L-shaped structure by using a pressing block, and forming a transition region of the self-adaptive glue blocking strip into a bent part of the L-shaped structure;
and placing the self-adaptive glue blocking strip with the L-shaped structure at the edge of the blank of the workpiece, and attaching the shape following area of the self-adaptive glue blocking strip to the edge profile of the blank of the workpiece, so that the reinforcing area of the self-adaptive glue blocking strip is attached to the surface of the mold.
According to a preferred embodiment, the method of use further comprises the steps of:
and forming a closed cavity on the self-adaptive glue blocking strip with the L-shaped structure and the vacuum bag and the mould surface in the process of packaging the blank of the workpiece.
According to a preferred embodiment, the briquetting includes briquetting, base and thickness limiting block, wherein, the upper surface of base is formed with V type groove, just the contained angle in V type groove is the right angle go up the bottom of briquetting form with the V type lug of V type groove looks adaptation, the thickness limiting block sets up the upper surface of base.
Based on the technical scheme, the self-adaptive glue blocking strip for molding the super-thick composite material part and the using method thereof at least have the following technical effects:
the self-adaptive rubber retaining strip for molding the ultra-thick composite material part is formed by embedding a thin carbon fiber laminated board and a carbon fiber prepreg into an unvulcanized rubber sheet and compounding. The self-adaptive glue blocking strip reinforced by the thin carbon fiber laminated board and the carbon fiber prepreg can be hardened at a high temperature and high pressure state, has higher rigidity than pure rubber, is not easy to bend or collapse, and can better provide support for the edge of a blank of a workpiece. Compare in traditional vulcanization and keep off the adhesive tape, the self-adaptation of this application keeps off the adhesive tape and need not to do other processings in the type in-process of enclosing, many places concatenation department, can heal up by oneself under high temperature high pressure. The self-adaptive rubber blocking strip can greatly shorten the width of a part allowance area, greatly improve the utilization rate of raw materials and reduce the cost.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIGS. 1 and 2 are schematic structural views of an adaptive glue-stopping strip for forming an ultra-thick composite material part according to the invention;
FIG. 3 is a schematic diagram of a pre-press of the adaptive glue-stop strip of the present invention into an L-shaped configuration;
FIG. 4 is a schematic view of the adaptive glue-blocking strip and the blank of the part of the present invention.
In the figure: 101-unvulcanized rubber sheet; 102-a laminar carbon fiber laminate; 103-carbon fiber prepreg; 104-self-adaptive glue blocking strip; 201-a blank of a part; 202-vacuum bag; 203-mold face; 301-conformal region; 302-a transition region; 303-an enhancement region; 401-briquetting; 402-briquetting; 403-a base; 404-thickness limiting blocks; 405-V-shaped grooves; 406-V shaped bump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The technical scheme of the invention is explained in detail in the following with the accompanying drawings of the specification.
Example 1
As shown in FIG. 1, the invention provides an adaptive rubber retaining strip for molding of an ultra-thick composite material part, wherein the adaptive rubber retaining strip 104 is formed by embedding a thin carbon fiber laminated board 102 and a carbon fiber prepreg 103 into an unvulcanized rubber sheet 101. Preferably, the thin carbon fiber laminate 102 and the carbon fiber prepreg 103 are distributed on both sides of the unvulcanized rubber sheet 101. The self-adaptive glue blocking strip reinforced by the thin carbon fiber laminated board 102 and the carbon fiber prepreg 103 can be hardened in a high-temperature and high-pressure state, has higher rigidity than pure rubber, is not easy to bend or collapse, and can better provide support for the edge of a blank of a workpiece.
Preferably, as shown in fig. 2, the adaptive glue stop strip 104 includes a conformal region 301, a transition region 302, and a reinforced region 303, wherein the transition region 302 is located between the conformal region 301 and the reinforced region 303. In the forming process of the blank of the workpiece, the shape following area 301 is used for being attached to the edge profile of the blank of the workpiece, the reinforcing area 303 is located at the bottom and is used for being attached to the surface of a mold, under the high-temperature and high-pressure environment in the forming process of the blank of the workpiece, the shape following area of the self-adaptive glue blocking strip deforms along with the edge of the blank of the workpiece, is hardened before the blank, and forms an L-shaped stop block along with the blank of the workpiece together with the transition area and the bottom reinforcing area to provide support for the edge of the blank of the workpiece.
Preferably, the conformal region 301 is formed by embedding the thin carbon fiber laminate 102 in the unvulcanized rubber sheet 101. Preferably, the thin carbon fiber laminate sheet 102 is embedded in the unvulcanized rubber sheet 101 so that the longitudinal direction thereof is parallel to the longitudinal direction of the unvulcanized rubber sheet 101. Preferably, the laminated carbon fiber laminate 102 has a thickness of less than 1 mm. Therefore, the conformal area compounded by the thin carbon fiber laminated board can be hardened under the high-temperature and high-pressure state, has higher rigidity than pure rubber, is not easy to bend or collapse, and provides good support for the edge of a blank of a workpiece.
Preferably, the transition zone 302 is formed from the uncured rubber sheet 101, i.e., it is to be understood that the transition zone 302 is a single component uncured rubber sheet. Or preferably, at least two layers of fiber cloth are arranged in the unvulcanized rubber sheet 101 in the transition area 302, and the length direction of the fiber cloth is embedded in the unvulcanized rubber sheet 101 in parallel with the length direction of the unvulcanized rubber sheet 101. During the molding of the blank, a transition area 302 is formed at the bend of the L-shaped structure stop. Preferably, the width of the transition area 302 is 3 mm-15 mm.
Preferably, as shown in fig. 1 and 2, the reinforcing region 303 is formed by embedding the carbon fiber prepreg 103 in the unvulcanized rubber sheet 101. The carbon fiber prepreg 103 is embedded in the unvulcanized rubber sheet 101 so that the longitudinal direction thereof is parallel to the longitudinal direction of the unvulcanized rubber sheet 101. When the self-adaptation keeps off the adhesive tape and forms L type structure, reinforcing area 303 is located the bottom and forms the bottom reinforcing area, provides the bottom holding power.
The self-adaptive glue blocking strip avoids the problems of resin loss, edge collapse and the like of an ultra-thick composite material part in the forming process, and thoroughly solves the edge effect of the ultra-thick composite material part in the forming process.
Example 2
The embodiment provides a use method of the adaptive rubber blocking strip in embodiment 1, and the use method includes the following steps:
step 1: the self-adaptive rubber blocking strip 104 is pre-pressed into an L-shaped structure by a pressing block 401, and a transition area 302 of the self-adaptive rubber blocking strip 104 is formed into a bending part of the L-shaped structure;
step 2: placing the self-adaptive glue blocking strip 104 with the L-shaped structure at the edge of the blank 201 of the workpiece, and attaching the shape following area 301 of the self-adaptive glue blocking strip 104 to the edge profile of the blank 201 of the workpiece, and attaching the reinforcing area 303 of the self-adaptive glue blocking strip 104 to the mold surface 203;
and step 3: the adaptive glue blocking strip 104 with the L-shaped structure forms a closed cavity with the vacuum bag 202 and the mold surface 203 during the process of encapsulating the blank 201 of the part. The hardened L-shaped self-adaptive glue blocking strip, the vacuum bag and the mold surface form a closed cavity, so that a blank of a workpiece is molded in the closed space, and edge effects such as resin loss, edge collapse and the like are avoided, as shown in FIG. 4.
Preferably, as shown in fig. 3, the pressing block 401 includes an upper pressing block 402, a base 403 and a thickness limiting block 404, wherein a V-shaped groove 405 is formed on the upper surface of the base 403, an included angle of the V-shaped groove 405 is a right angle, a V-shaped protrusion 406 matched with the V-shaped groove 405 is formed at the bottom of the upper pressing block 402, and the thickness limiting block 404 is disposed on the upper surface of the base 403. Preferably, the thickness of the thickness limiting block 404 is consistent with the thickness of the adaptive glue stop strip 104. In the pre-pressing process, the self-adaptive glue blocking strip is placed in a V-shaped groove 405 of the base 403, so that the upper pressing block 402 moves downwards, the convex tip of the V-shaped bump is in contact with the transition area 302, and the self-adaptive glue blocking strip is pre-pressed into an L-shaped structure by pressing downwards.
According to the invention, the self-adaptive rubber blocking strip is formed by compounding the unvulcanized rubber sheet, the thin carbon fiber laminated board and the carbon fiber prepreg, and is placed at the edge of a blank of a workpiece to form the L-shaped stop block which follows the edge of the blank. In the molding process of the blank of the workpiece, the self-adaptive rubber blocking strip deforms along with the edge of the blank of the workpiece under the high-temperature and high-pressure environment and is hardened before the blank, the hardened L-shaped check block, the vacuum bag and the mold surface form a closed space, and the blank is molded in the closed space, so that the edge effects of resin loss, edge collapse and the like are avoided. Meanwhile, after the self-adaptive rubber blocking strip is applied, the width of a part allowance area can be greatly shortened, and the utilization rate of materials is greatly improved.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like 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 also 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; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The self-adaptive rubber retaining strip for molding of the super-thick composite material part is characterized in that the self-adaptive rubber retaining strip (104) is formed by embedding a thin carbon fiber laminated board (102) and a carbon fiber prepreg (103) into an unvulcanized rubber sheet (101) in a compounding mode, and the thin carbon fiber laminated board (102) and the carbon fiber prepreg (103) are distributed on two sides of the unvulcanized rubber sheet (101).
2. The adaptive flashing strip of claim 1 wherein the adaptive flashing strip (104) comprises a shape-following region (301), a transition region (302), and a reinforcement region (303), wherein the transition region (302) is located between the shape-following region (301) and the reinforcement region (303),
the conformal area (301) is formed by embedding the thin carbon fiber laminated board (102) in the unvulcanized rubber sheet (101) in a composite manner; the transition region (302) is formed by molding the unvulcanized rubber sheet (101), and the reinforcing region (303) is formed by embedding the carbon fiber prepreg (103) in the unvulcanized rubber sheet (101) in a composite manner.
3. The adaptive rubber dam of claim 2 wherein the length direction of the thin carbon fiber laminate sheet (102) is embedded in the unvulcanized rubber sheet (101) parallel to the length direction of the unvulcanized rubber sheet (101).
4. The adaptive glue stop strip of claim 2, wherein the thin carbon fiber laminate (102) has a thickness of less than 1 mm.
5. The adaptive rubber stopper strip according to claim 2, wherein the width of the transition area (302) is 3-15 mm.
6. The adaptive rubber blocking strip according to claim 2, wherein the carbon fiber prepreg (103) is embedded in the unvulcanized rubber sheet (101) in a manner that the longitudinal direction of the unvulcanized rubber sheet (101) is parallel to the longitudinal direction of the unvulcanized rubber sheet (101).
7. The adaptive rubber stopper strip according to claim 2, wherein at most two layers of fiber cloth are arranged in the unvulcanized rubber sheet (101) in the transition region (302), and the fiber cloth is embedded in the unvulcanized rubber sheet (101) in a manner that the length direction of the fiber cloth is parallel to the length direction of the unvulcanized rubber sheet (101).
8. Use method of an adaptive rubber stop strip according to any one of claims 1 to 7, characterized in that the use method comprises the following steps:
the self-adaptive rubber blocking strip (104) is pre-pressed into an L-shaped structure by a pressing block (401), and a transition area (302) of the self-adaptive rubber blocking strip (104) is formed into a bending part of the L-shaped structure;
the method comprises the steps of placing the self-adaptive glue blocking strip (104) of the L-shaped structure at the edge of a workpiece blank (201), enabling a shape following area (301) of the self-adaptive glue blocking strip (104) to be attached to the edge profile of the workpiece blank (201), and enabling a reinforcing area (303) of the self-adaptive glue blocking strip (104) to be attached to a mold surface (203).
9. Use according to claim 8, characterized in that it further comprises the following steps:
the self-adaptive glue blocking strip (104) with the L-shaped structure and a vacuum bag (202) and a mould surface (203) in the process of packaging the blank (201) of the workpiece form a closed cavity.
10. The use method according to claim 8, characterized in that the pressing block (401) comprises an upper pressing block (402), a base (403) and a thickness limiting block (404), wherein a V-shaped groove (405) is formed on the upper surface of the base (403), the included angle of the V-shaped groove (405) is a right angle, a V-shaped bump (406) matched with the V-shaped groove (405) is formed at the bottom of the upper pressing block (402), and the thickness limiting block (404) is arranged on the upper surface of the base (403).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210822993.5A CN114889172B (en) | 2022-07-14 | 2022-07-14 | Self-adaptive rubber blocking strip for molding ultra-thick composite material part and using method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210822993.5A CN114889172B (en) | 2022-07-14 | 2022-07-14 | Self-adaptive rubber blocking strip for molding ultra-thick composite material part and using method |
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| CN114889172B CN114889172B (en) | 2022-10-25 |
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