CN117002036A - Forming die for large-thickness carbon fiber composite material joint - Google Patents
Forming die for large-thickness carbon fiber composite material joint Download PDFInfo
- Publication number
- CN117002036A CN117002036A CN202210452579.XA CN202210452579A CN117002036A CN 117002036 A CN117002036 A CN 117002036A CN 202210452579 A CN202210452579 A CN 202210452579A CN 117002036 A CN117002036 A CN 117002036A
- Authority
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- China
- Prior art keywords
- positioning sleeve
- carbon fiber
- fiber composite
- die
- bottom plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 37
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 37
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 239000003292 glue Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 239000004809 Teflon Substances 0.000 claims description 6
- 229920006362 Teflon® Polymers 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims 2
- 238000000465 moulding Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- 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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
-
- 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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/345—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The application discloses a large-thickness carbon fiber composite material joint forming die, which comprises a cylindrical positioning sleeve, a circular bottom plate, a supporting die with a section of inner conical surface and an annular cover serving as an upper die, wherein the circular bottom plate is provided with a plurality of grooves; the bottom of the positioning sleeve is provided with a flange plate extending outwards from the cylinder body; the inner diameter of the circular ring is matched with the outer diameter of the cylinder body of the positioning sleeve, the circular ring-shaped bottom plate is sleeved at the lower part of the cylinder body of the positioning sleeve, and the bottom of the bottom plate is connected with the flange plate; the support die is sleeved outside the positioning sleeve, and the lower part of the support die is connected with the annular bottom plate; the inner side end of the annular cover is sleeved on the upper part of the positioning sleeve body, and the outer side end of the annular cover is fixedly connected with the supporting die through a connecting piece; the lower side of the annular cover, the outer side of the cylinder body of the positioning sleeve, the upper side of the annular bottom plate and the inner side of the supporting die are surrounded to form a layering cavity for forming the large-thickness carbon fiber composite material joint.
Description
Technical Field
The application relates to the technical field of mold production, in particular to a large-thickness carbon fiber composite material joint forming mold.
Background
The solid rocket engine has very wide application in missile weapons, carrier rockets and space vehicles and mainly comprises four parts of a shell, solid propellant, a spray pipe assembly and an ignition device. Wherein the front and rear joints of the casing play an important role in the overall system in the key stress elements and external connection elements of the rocket motor casing. The traditional solid rocket engine shell joint is generally made of metal materials such as aviation aluminum alloy, titanium alloy and high-strength structural steel, the total mass of the front metal joint and the rear metal joint accounts for about 10-15% of the shell, and the application of the carbon fiber composite joint can reduce the weight of the similar metal joint by 30-50% under the condition of ensuring the same bearing force.
As the solid rocket engine shell tends to be larger, the sizes and thicknesses of parts of the solid rocket engine shell are larger, the weight reduction advantage of the carbon fiber composite material joint is more obvious, and the application requirements of the large-thickness carbon fiber composite material joint with the thickness of more than 50mm are more and more. However, for the large-thickness carbon fiber composite material joint, no corresponding mold can be integrally molded and cured at present, and the carbon fiber composite material product has the problem of difficult mold stripping after curing and molding.
Disclosure of Invention
The application aims to solve the technical problems of overcoming the defects in the prior art and providing the large-thickness carbon fiber composite material joint forming die which can solve the problem that the large-thickness carbon fiber composite material joint is difficult to demould and can improve the production efficiency and the forming quality.
The technical problems to be solved by the method can be implemented by the following technical schemes.
A large-thickness carbon fiber composite material joint forming die is characterized by comprising:
a cylindrical positioning sleeve (3), wherein a flange (31) extending outwards from the cylinder is arranged at the bottom of the positioning sleeve (3); and
the inner diameter of the circular ring-shaped bottom plate (2) is matched with the outer diameter of the cylinder body of the positioning sleeve (3), the circular ring-shaped bottom plate (2) is sleeved at the lower part of the cylinder body of the positioning sleeve (3), and the bottom of the bottom plate is connected with the flange plate (31); and
a supporting die (1) with a section of inner conical surface, wherein the supporting die (1) is sleeved outside the positioning sleeve (3), and the lower part of the supporting die (1) is connected with the annular bottom plate (2); and
the annular cover (4) is used as an upper die, the inner side end of the annular cover (4) is sleeved on the upper part of the cylinder body of the positioning sleeve (3), and the outer side end of the annular cover (4) is fixedly connected with the supporting die (1) through a connecting piece;
the lower side of the annular cover (4), the outer side of the cylinder body of the positioning sleeve (3), the upper side of the annular bottom plate (2) and the inner side of the supporting die (1) are surrounded to form a layering cavity for forming the large-thickness carbon fiber composite material joint.
Furthermore, a drawing die angle is arranged on the outer side surface of the cylinder body of the positioning sleeve (3). For example, the locating sleeve (3) is provided with a drawing angle of 1 DEG, so that a product is separated from the locating sleeve during demolding.
As a further improvement of the technical scheme, the forming surface of the layering cavity is sprayed with a separation coating. The isolation coating is preferably a Teflon coating, but is not limited to Teflon, so that the product is convenient to demold, the release agent is not required to be precoated, and the molded product is convenient to separate from the mold, thereby improving the production efficiency.
As a preferable form of the application, the annular bottom plate (2) is detachably connected with the flange plate (31) into a whole; the supporting die (1) and the annular bottom plate (2) are detachably connected into a whole.
Also as a preferable form of the application, the upper end surface of the supporting die (1) is provided with a glue overflow groove; the cylinder wall and the upper end face of the cylinder body of the positioning sleeve (3) are provided with continuous glue overflow grooves. Excess resin can overflow through the overflow groove in the compression molding process.
Preferably, the inner side end of the cylinder body of the positioning sleeve (3) is provided with a reinforcing rib.
As a further improvement of the technical scheme, the supporting die (1) further comprises a section of columnar surface (17), wherein the columnar surface is positioned at the lower end of the inner conical surface and is naturally connected with the inner conical surface, and the columnar surface and the inner conical surface form part of the molding surface of the layering molding cavity.
As one of the preferred embodiments of the application, threaded holes for installing hoisting screws and/or jackscrew demoulding screws are arranged on the supporting die (1), the annular bottom plate (2), the positioning sleeve (3) and/or the annular cover (4). When in hoisting, the lifting ring screw is screwed in, so that the lifting ring screw can be conveniently carried; when the demolding is disassembled, the hexagon head screw is screwed in to be used for demolding the jackscrew, and the components are separated from the product.
The forming die adopting the technical scheme is used for forming the large-thickness carbon fiber composite material joint, but is not limited to forming the large-thickness carbon fiber composite material joint, and the large-thickness glass fiber composite material joint is also included.
The working principle of the application is as follows: the female die is fixedly connected with the bottom plate through an inner hexagonal cylindrical head bolt, the bottom plate is fixedly connected with the positioning sleeve through an inner hexagonal cylindrical head bolt, a large-thickness carbon fiber composite material joint laying cavity is formed, and teflon is sprayed on the surface of the laying cavity; paving carbon fiber prepreg in the paving cavity for product paving; after layering, the upper die is positioned by a positioning sleeve and is matched with the female die; after die assembly, lifting the whole die to the working table of the press, and curing and forming by adopting a heating and pressurizing mode of the press; when demoulding and disassembling after forming, screwing in the hexagon head screw can be used for stripping jackscrew, and the upper die, the locating sleeve, the bottom plate, the female die (supporting die) and the product are separated in sequence.
The application has the positive effects that: the preparation process of the integrated compression molding of the large-thickness carbon fiber composite connector is realized, the blank of the integrated compression molding and curing molding die of the large-thickness carbon fiber composite connector is filled, and the problem of difficult demoulding of the large-thickness carbon fiber composite connector is solved; and the Teflon is sprayed on the molding surface, so that repeated coating of a release agent is avoided, and the production efficiency and the molding quality of the large-thickness carbon fiber composite material joint are improved.
The application has the advantages that: the split type connection is adopted, so that the structure is simple, the operation is convenient, and the installation and the disassembly are convenient; the female die and the positioning sleeve are provided with glue overflow grooves, and excessive resin can overflow through the glue overflow grooves in the die pressing and curing process; each part is provided with a hoisting threaded hole, and the hoisting and transferring are convenient.
Drawings
FIG. 1 is a cut-away view of the overall structure of the present application;
FIG. 2 is a schematic diagram of the overall structure of the present application;
FIG. 3 is a schematic diagram of a female die structure according to the present application;
FIG. 4 is a schematic view of the structure of the base plate of the present application;
FIG. 5 is a schematic view of a positioning sleeve according to the present application;
fig. 6 is a schematic diagram of the upper die structure of the present application.
The marks in the drawings are: 1. a female die; 11. an inner conical surface; 12. a transition surface; 13. a glue overflow groove; 14. a cavity; 15. a support plate; 16. a top surface; 17. a columnar surface;
2. a bottom plate;
3. a positioning sleeve; 31. a flange plate; 32. a cylinder; 33. reinforcing ribs; 34. a glue overflow groove; 311. a connection hole;
4. and (5) upper die.
Detailed Description
The following describes in further detail the specific embodiments of the large-thickness carbon fiber composite material joint forming die according to the present application with reference to the accompanying drawings, and further describes in detail the design and use process according to the present application by way of examples.
The embodiment is a large-thickness carbon fiber composite material joint forming die, referring to fig. 1 to 6, the forming die is composed of an outer female die 1 serving as a supporting die, a bottom plate 2 at the bottom, an inner positioning sleeve 3 and an upper die 4 at the upper part serving as a cover plate, the female die 1 and the bottom plate 2 are fixedly connected by adopting inner hexagonal cylindrical bolts, the bottom plate 2 and the positioning sleeve 3 are fixedly connected by adopting inner hexagonal cylindrical bolts, and the upper die 4 is installed in a positioning way through the positioning sleeve 3 and is matched with the female die 1. Adopt split type connection installation, simple structure, convenient operation is convenient for assemble and dismantlement.
In the use process, after the female die 1, the bottom plate 2 and the positioning sleeve 3 are connected, a layering cavity is formed, teflon is sprayed on the surface of the layering cavity, carbon fiber prepreg is paved on the surface of the cavity, a vacuum bag vacuumizing mode is adopted for prepressing, after paving is completed, the upper die 4 is positioned and installed through the positioning sleeve 3 and is matched with the female die 1, and then the whole die is lifted to a working table of a press for pressurizing, heating and solidifying.
Referring to fig. 1 and 3, the female die 1 is used as a supporting die, the molding surface of the female die comprises a section of inner conical surface 11, a transition surface 12 is arranged between the inner conical surface 11 and the top surface 16, and a section of cylindrical molding surface (i.e. a cylindrical surface 17 in the figure) is arranged at the lower part of the inner conical surface 11. A plurality of continuous glue overflow grooves 13 are arranged on the transition surface 12 and the top surface 16. The supporting mould is supported by a plurality of supporting plates 15 (which can also be regarded as reinforcing ribs), a cavity 14 which is convenient for weight reduction of the parts is formed between the supporting plates 15, and meanwhile, the bearing and the compression of the inner molding surface (mainly referred to as an inner conical surface 11) are ensured to meet the requirements.
Referring to fig. 1 and 5, the positioning sleeve 3 comprises a cylinder 32 with a certain drawing angle, for example, a drawing angle of 1 degree is provided, so that a molded product is conveniently separated from the positioning sleeve; the bottom of barrel 32 is equipped with the outward flange 31 that extends, is provided with connecting hole 311 on the flange 31, is convenient for connect the bottom plate 2 of bottom through the connecting piece, and wherein, bottom plate 2 can cup joint on barrel 32, and both detachable are connected as an organic wholely. The inner end of the cylinder 32 is provided with a plurality of reinforcing ribs 33 to cope with the damage of the cylinder 32 under the action of a large pressure. The upper part of the outer wall of the cylinder 32 is connected with the top end of the cylinder, and a plurality of glue overflow grooves 34 are arranged along with the end face of the top end of the cylinder.
The female die 1 and the positioning sleeve 3 are provided with glue overflow grooves at the upper end face, and redundant resin can flow out through the glue overflow grooves in the curing process of the carbon fiber prepreg in the heating and pressurizing curing process.
In addition, the female die 1, the bottom plate 2, the positioning sleeve 3 and the upper die 4 are all provided with threaded holes. The lifting ring screw is screwed in, so that the lifting and transferring are convenient; when demoulding, the upper die, the locating sleeve, the bottom plate, the female die and the product can be separated in sequence by screwing in the hexagon head screw.
The bottom plate 2 and the upper die 4 are both of annular structures, wherein the molding surface of the upper die 4 can be set to be an arc surface according to the structural requirement of a molded workpiece. The upper and lower parts are connected with the bottom plate 2 in a sealing way through the upper die 4 to form a layering cavity together. The corresponding produced composite joint inner ring thickness is > 50mm (i.e. the thickness of the cavity formed part is > 50mm, the so-called high thickness condition of the application).
The application has the advantages of convenient installation, low cost, simple disassembly, convenient product demoulding and the like,
the foregoing is merely a preferred embodiment of the present application, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the concept of the present application, and are intended to be within the scope of the present application.
Claims (10)
1. The utility model provides a large thickness carbon fiber composite material connects forming die which characterized in that includes:
a cylindrical positioning sleeve (3), wherein a flange (31) extending outwards from the cylinder is arranged at the bottom of the positioning sleeve (3); and
the inner diameter of the circular ring-shaped bottom plate (2) is matched with the outer diameter of the cylinder body of the positioning sleeve (3), the circular ring-shaped bottom plate (2) is sleeved at the lower part of the cylinder body of the positioning sleeve (3), and the bottom of the bottom plate is connected with the flange plate (31); and
a supporting die (1) with a section of inner conical surface (11), wherein the supporting die (1) is sleeved outside the positioning sleeve (3), and the lower part of the supporting die (1) is connected with the annular bottom plate (2); and
the annular cover (4) is used as an upper die, the inner side end of the annular cover (4) is sleeved on the upper part of the cylinder body of the positioning sleeve (3), and the outer side end of the annular cover (4) is fixedly connected with the supporting die (1) through a connecting piece;
the lower side of the annular cover (4), the outer side of the cylinder body of the positioning sleeve (3), the upper side of the annular bottom plate (2) and the inner side of the supporting die (1) are surrounded to form a layering cavity for forming the large-thickness carbon fiber composite material joint.
2. The large-thickness carbon fiber composite material joint forming die according to claim 1, wherein a drawing angle is arranged on the outer side surface of the cylinder body of the positioning sleeve (3).
3. The large-thickness carbon fiber composite material joint forming die according to claim 1 or 2, wherein the positioning sleeve (3) is provided with a draft angle of 1 °.
4. The high thickness carbon fiber composite joint forming die of claim 1, wherein the forming surface of the lay-up cavity is sprayed with a barrier coating.
5. The high thickness carbon fiber composite joint forming die of claim 4, wherein the barrier coating is a teflon coating.
6. The large-thickness carbon fiber composite material joint forming die according to claim 1, wherein the annular bottom plate (2) is detachably connected with the flange plate (31) into a whole; the supporting die (1) and the annular bottom plate (2) are detachably connected into a whole.
7. The large-thickness carbon fiber composite material joint forming die as claimed in claim 1, wherein the upper end surface of the supporting die (1) is provided with a glue overflow groove; the cylinder wall and the upper end face of the cylinder body of the positioning sleeve (3) are provided with continuous glue overflow grooves.
8. The large-thickness carbon fiber composite material joint forming die according to claim 1, wherein the inner side end of the cylinder of the positioning sleeve (3) is provided with a reinforcing rib (33).
9. The high-thickness carbon fiber composite material joint forming die according to claim 1, wherein the supporting die (1) further comprises a section of columnar surface (17), the columnar surface is positioned at the lower end of the inner conical surface and is naturally connected with the inner conical surface, and the columnar surface and the inner conical surface form part of the cavity surface of the layering cavity forming surface.
10. The large-thickness carbon fiber composite material joint forming die according to claim 1, wherein threaded holes for installing hoisting screws and/or jackscrew demoulding screws are formed in the supporting die (1), the annular bottom plate (2), the positioning sleeve (3) and/or the annular cover (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210452579.XA CN117002036A (en) | 2022-04-27 | 2022-04-27 | Forming die for large-thickness carbon fiber composite material joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210452579.XA CN117002036A (en) | 2022-04-27 | 2022-04-27 | Forming die for large-thickness carbon fiber composite material joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117002036A true CN117002036A (en) | 2023-11-07 |
Family
ID=88560445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210452579.XA Pending CN117002036A (en) | 2022-04-27 | 2022-04-27 | Forming die for large-thickness carbon fiber composite material joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117002036A (en) |
-
2022
- 2022-04-27 CN CN202210452579.XA patent/CN117002036A/en active Pending
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