CN113211821A - Composite material conical section shell forming die and method thereof - Google Patents
Composite material conical section shell forming die and method thereof Download PDFInfo
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- CN113211821A CN113211821A CN202110406419.7A CN202110406419A CN113211821A CN 113211821 A CN113211821 A CN 113211821A CN 202110406419 A CN202110406419 A CN 202110406419A CN 113211821 A CN113211821 A CN 113211821A
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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
- B29C70/30—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
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/308—Adjustable moulds
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulding By Coating Moulds (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a composite material conical section shell forming die and a method thereof in the technical field of composite material forming, wherein the composite material conical section shell forming die comprises a die body and a pressing plate; the die body is a conical cylinder, and an opening at the bottom end of the die body is turned outwards to form a flange connecting section; the pressing plate comprises a flange pressing plate and a side pressing plate, the flange pressing plate comprises a flange surface pressing section and a supporting section, and the side pressing plate is of an L-shaped structure; after the prepreg is laid on the surface of the die body, the flange surface pressing section covers the surface of the prepreg on the flange connecting section, the end part of the side pressure plate is arranged on the supporting section, and the inner surface of the side pressure plate is attached to the prepreg surface of the corner part of the die body. According to the invention, through the design of the joint support of the side pressure plate and the surface of the flange pressure plate, the integral compaction operation can be carried out on the prepreg at the position where the flange structure is formed, and meanwhile, due to the characteristic of the split structure, the prepreg and the flange pressure plate can move relatively, so that the prepreg can be fully compacted, and the defects of glue gathering, layering, pores and the like existing after curing are reduced.
Description
Technical Field
The invention relates to the technical field of composite material forming, in particular to a composite material conical section shell forming die and a method thereof.
Background
At present, the carrier rocket load-bearing structure for spaceflight uses a large amount of high-strength composite materials, and has the main advantages that the composite material has a good weight reduction effect, and the effective load of single launch can be increased. As an important bearing structure of the rocket body final power cabin, the composite material conical section is used for supporting effective loads such as satellites. The typical structure of the composite material conical section is a thin-wall conical section, the front end and the rear end of the composite material conical section are thickened flanges, and a section of wall thickness gradual change area is arranged between the flanges and the conical section. In order to improve the strength of the interface position on the flange, the wall thickness of the thickened area of the flange can reach 12mm to the maximum; the conical section flange needs to be turned outwards under the limitation of the internal space of the power cabin, and a continuous turning is formed at the joint of the flanges, and the turning angle can reach 90 degrees. Due to the factors, the prepreg in the thickened area of the flange is difficult to compact, and the defects of glue gathering, layering, pores and the like are easily generated after curing. And the prepreg in the thickening area is fully compacted by optimizing a pressurizing mode.
The search of the existing patent literature shows that Chinese invention patent publication No. CN109849367A discloses a method for processing a large-thickness composite skirt, which comprises the following steps: preparing a material; preparing a mould; laying; assembling an envelope; curing; demolding; the method is characterized in that in the laying process, after the composite material with preset thickness is laid, the composite material and the die are integrally pre-compacted. According to the processing method provided by the invention, the composite material is pre-compacted in the process of laying, so that bubbles among composite material layers can be effectively eliminated, the bonding quality among the layers is improved, and the compaction of the composite material blank is tighter. The cover plate for a press plate disclosed in the patent art has the above-mentioned problem of not being able to be compacted, particularly the flange deformation section.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a composite material conical section shell forming die and a method thereof.
The invention provides a composite material conical section shell forming die which comprises a die body and a pressing plate, wherein the die body is provided with a die cavity;
the die body is a conical cylinder, an opening at the bottom end of the die body is turned outwards to form a flange connecting section, and an included angle alpha between the flange connecting section and the outer surface of the cylinder body of the die body is smaller than 90 degrees;
the pressing plate comprises a flange pressing plate and a side pressing plate, the flange pressing plate comprises a flange surface pressing section and a supporting section, and the side pressing plate is of an L-shaped structure;
after the prepreg is laid on the surface of the die body, the flange surface pressing section covers the surface of the prepreg on the flange connecting section, the end part of the side pressure plate is arranged on the supporting section, and the inner surface of the side pressure plate is attached to the surface of the prepreg at the corner part of the die body.
In some embodiments, the end face of the side platen which is in contact with the surface of the support section is slidable relative to the surface of the support section.
In some embodiments, the end portions of the side pressing plates are L-shaped, the end transverse plates of the side pressing plates are attached to the horizontal sections of the supporting sections, and the end vertical plates of the side pressing plates are located outside the vertical surfaces of the supporting sections.
In some embodiments, the vertical plate at the end of the side pressure plate is provided with a through hole, a screw is connected with the supporting section through the through hole, and when the side pressure plate slides relative to the supporting section, the surface of the screw is not in contact with the surface of the through hole.
In some embodiments, the side pressure plate comprises a flat section and a tapered section, the tapered section becomes thinner gradually from one end connected with the flat section to the other end, and the end surface of the flat section is in contact with the surface of the support section.
In some embodiments, the inner surface of the straight section and the inner surface of the tapered section smoothly transition in a curve.
In some embodiments, the flange pressing plate further includes a surrounding strip section, the surrounding strip section is connected to the outer side of the flange surface pressing section, the surrounding strip section and the supporting section are respectively located at two axial ends of the flange surface pressing section, an end surface of the surrounding strip section is higher than an end surface of the flange surface pressing section, and a side surface of the surrounding strip section higher than the surface of the flange surface pressing section is used for contacting with an end surface of the prepreg.
In some embodiments, a gasket is arranged between the end face of the surrounding strip section and the surface of the flange connecting section, and the height of the gasket is adjustable.
In some embodiments, a plurality of groups of the pressing plates are arranged along the circumferential direction of the bottom opening of the die body, and the plurality of groups of the pressing plates are arranged at intervals.
The invention also provides a method for molding the composite material conical section shell, which adopts the composite material conical section shell molding die and comprises the following steps:
step S1, cleaning the die main body, the flange pressing plate and the side pressing plate, and coating a release agent after cleaning;
step S2, laying prepreg on the mould main body according to preset requirements;
step S3, pressing the flange surface pressing section on the prepreg on the flange connecting section, and meanwhile, placing the end part of the side pressing plate on the supporting section, and adhering and wrapping the inner surface of the side pressing plate on the prepreg surface of the corner part of the mould main body;
step S4, sleeving the mould main body with the prepreg laid on the surface and the pressing plate covered on the prepreg into a vacuum bag;
step S5, conveying the device formed in the step S4 into a hot-pressing tank, vacuumizing the vacuum bag, heating to 120-200 ℃, applying pressure through nitrogen or air, and keeping the vacuum, the temperature and the pressure for a preset time;
and S6, releasing pressure, cooling the formed composite material conical section shell to room temperature, stopping vacuum and demolding.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the ingenious matching of the flange pressing plate and the side pressing plate, namely through the joint support design of the side pressing plate and the surface of the flange pressing plate, the flange pressing plate and the flange pressing plate have the integral structural characteristics when being subjected to external pressure, the integral compaction operation can be carried out on the prepreg at the position where the flange structure is formed, and meanwhile, due to the characteristic of a split structure, the flange pressing plate and the side pressing plate can move relatively, so that the prepreg can be fully compacted, and the defects of glue gathering, layering, pores and the like existing after curing can be reduced.
2. According to the invention, through the design of the sliding connection relationship between the support section and the side pressure plate, the pressure loss caused by mutual interference when the prepreg is compressed by the pressure plate can be effectively solved, and the compaction operation effect of the prepreg is improved.
3. According to the invention, through the optimized design of the side pressure plate structure, the compaction operation effect is ensured, and meanwhile, the potential safety hazard caused by accidental falling of the side pressure plate in the installation process is prevented.
4. According to the flange pressing plate structure, the surrounding strip section is arranged in the flange pressing plate structure, so that the number of parts in the structure is reduced, the distance between the flange pressing plate and the flange connecting section on the die main body is adjustable, and the quantitative adjustment of the flange pressing plate on the compression amount of the flange connecting section is realized.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic cross-sectional view of the overall structure of the present invention;
FIG. 2 is a schematic view of the platen structure of the present invention;
fig. 3 is a schematic view of the overall structure of the present invention after installation.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
The invention provides a composite material conical section shell forming die which comprises a die body 1 with a conical barrel structure and a pressing plate 2 for pressing prepreg laid on the die body 1. The openings at the upper end and the lower end of the die body 1 are used for being connected with other structural sections, the bottom end of the die body 1 is provided with a flange connecting section 11, the flange connecting section 11 is formed by outwards turning along the edge of the die body 1, the flange connecting section 11 formed by outwards turning forms an included angle alpha with the die body 1, the range of the included angle alpha is smaller than 90 degrees, and the included angle alpha forms a complementary angle with one half of the taper angle of the die body 1 under the general condition, namely the included angle alpha and the half of the taper angle of the die body 1 are equal to 90 degrees. When the included angle α between the flange connecting section 11 and the mold body 1 is smaller than 90 °, the flange connecting section 11 and the cylinder of the mold body 1 form a corner with an approximately C-shaped structure, and a straight line segment with a certain length is formed between the cylinder of the mold body 1 and the surface of the flange connecting section 11.
The pressing plate 2 comprises a flange pressing plate 21 and a side pressing plate 22, the flange pressing plate 21 is matched with the flange connecting section 11, the prepreg is clamped in the flange pressing plate 21, and the part which is transited to the cylinder surface of the die main body 1 from the flange connecting section 11 and extends for a certain distance is pressed through the side pressing plate 22. The flange pressing plate 21 comprises a flange surface pressing section 211 and a supporting section 212, wherein the flange surface pressing section 211 covers the prepreg on the flange connecting section 11, and the length of the flange surface pressing section 211 comprises a certain distance which is beyond the flange connecting section 11 due to the thickness relation. The supporting section 212 is formed by extending a certain distance from the flange surface pressing section 211 to the direction in the cylinder, the surface of the supporting section 212 and the surface of the flange surface pressing section 211 are the same surface, the lower end surface of the side pressure plate 22 is arranged on the surface of the supporting section 212, the lower end surface of the side pressure plate 22 can be completely arranged on the supporting section 212 or partially arranged on the supporting section 212, and the supporting section 212 is used for supporting the side pressure plate 22. The side pressing plates 22 are of an integrally formed L-shaped structure, and the corner structure formed by the flange connecting section 11 and the cylinder of the die main body 1 can be better adapted by setting the angles of the inner side surfaces of the side pressing plates 22. After the lower end surfaces of the side pressing plates 22 are placed on the supporting sections 212, the upper and lower inner side surfaces thereof are respectively attached to the partial surface of the cylinder and the surface of the straight line section connecting the cylinder 1 and the flange connecting section.
The working principle of the invention is as follows: after the prepreg is laid on the mold body 1 and covers auxiliary members such as airfelt and an isolation film, the flange pressing plate 21 is placed on the prepreg on the flange connecting section 11, the supporting section 212 of the flange pressing plate 21 is positioned outside the prepreg, then the end part of the side pressing plate 22 is placed on the supporting section 212, and the inner surface of the side pressing plate 22 is attached to the corner part of the mold body 1, and then the device on which the prepreg is laid is placed in a vacuum bag and then sent into a hot-pressing tank to perform vacuumizing, heating and pressurizing operations, and in the process, the flange pressing plate 21 and the side pressing plate 22 perform compacting operations on the prepreg due to external pressure. According to the invention, through the ingenious matching of the flange pressing plate and the side pressing plate, namely through the joint support design of the side pressing plate and the surface of the flange pressing plate, the flange pressing plate and the flange pressing plate have the integral structural characteristics when being subjected to external pressure, the integral compaction operation can be carried out on the prepreg at the position where the flange structure is formed, and meanwhile, due to the characteristic of a split structure, the flange pressing plate and the side pressing plate can move relatively, so that the prepreg can be fully compacted, and the defects of glue gathering, layering, pores and the like existing after curing can be reduced.
Preferably, the end surfaces of the side pressure plates 22 and the surface of the supporting section 212 are connected in a sliding manner, that is, the side pressure plates 22 arranged on the surface of the supporting section 212 can slide relatively along the surface of the supporting section 212, and the sliding manner is preferably realized by polishing the two surfaces in contact, so as to reduce the contact friction coefficient of the two surfaces. When the flange pressing plate 21 and the side pressing plates 22 are subjected to external force to perform compaction operation on the prepreg, the side pressing plates 22 can perform corresponding micro-movement according to external pressure and internal pressure formed by part of the prepreg moving to the part covered by the side pressing plates 22 after the prepreg is pressed by the flange pressing plate 21, so that pressure loss caused by mutual interference when the prepreg is compressed by the pressing plates can be effectively solved, and the compaction operation effect of the prepreg is improved.
Preferably, the bottom opening ring of mould body 1 is provided with multiunit clamp plate 2, and multiunit clamp plate 2 interval sets up. The distance between the two plates is 2-5mm, so that the mutual interference of the pressing plates caused by installation errors is avoided.
Example 2
The embodiment 2 is formed on the basis of the embodiment 1, and through the optimized design of the structure of the side pressure plate, the potential safety hazard caused by accidental falling of the side pressure plate in the installation process is prevented while the compaction operation effect is ensured. Specifically, the method comprises the following steps:
the side press plate 22 integrally formed into an L-shaped structure comprises a straight section 221 and a tapered section 222, wherein the straight section 221 and the tapered section 222 are integrally formed. The end of the straight section 221 away from the tapered section 222 is in close contact with the surface of the support section 212, and the tapered section 222 is preferably an equilateral triangle or a right-angled triangle, and becomes thinner from the end of the tapered section 222 connected to the straight section 221 to the end of the other end. The thickness design of the tapered section in the side pressure plate 22 can reduce the upper layer pressure laid at the corner of the mould main body, so that air bubbles are more easily discharged in the prepreg compaction process, and the compaction density of the prepreg is improved. Furthermore, the inner surface of the straight section 221 connected with the tapered section 222 is designed to form an arc transition surface through smooth transition of a curve, so that the problem of stress concentration is reduced.
Preferably, the end of the side pressure plate 22 is L-shaped and is connected to the supporting section 212 in an inverted manner. When the side pressure plate 22 comprises the straight section 221 and the tapered section 222, the end of the straight section 221 away from the tapered section 222 is in an L-shaped structure. The plate surfaces of the end transverse plates of the side pressing plates 22 are attached to the surface of the supporting section 212, the end vertical plates of the side pressing plates 22 are located outside the end surface of the supporting section 212, and the end vertical plates of the side pressing plates 22 are used for limiting the maximum moving distance of the side pressing plates 22 along the direction of the supporting section 212 towards the flange surface pressing section 211 so as to prevent the prepreg located at the part from being subjected to overlarge pressure.
Furthermore, the end riser of the side pressure plate 22 is provided with a through hole 220 for preventing falling, the through hole 220 is used for preventing falling of the side pressure plate 22, and the means for preventing falling of the side pressure plate 22 can be screwed with the support section 212 by a screw passing through the through hole 220. Meanwhile, in order to prevent the screws from influencing the sliding of the side pressing plates 22 relative to the supporting sections 212 in the prepreg compacting operation process, the aperture of the through holes 220 is larger than the outer diameter of the screws, namely after the screws penetrate through the through holes 220, the outer surfaces of the screws are basically not in contact with the inner surfaces of the through holes 220, so that the influence on the sliding of the side pressing plates 22 is avoided, and the screws can prevent the side pressing plates from falling off only when the side pressing plates 22 fall off due to other reasons, so that toes or other safety accidents are prevented from being injured by smashing.
Example 3
This embodiment 3 forms on the basis of embodiment 1 or embodiment 2, sets up the surrounding strip section in the flange clamp plate structure, has not only reduced the spare part quantity in the structure, still makes the interval between the flange connection section on flange clamp plate and the mould main part adjustable, realizes the quantitative regulation of flange clamp plate to flange connection section compression capacity. Specifically, the method comprises the following steps:
one end of the flange pressing plate 21 is provided with a surrounding strip section 213, and the surrounding strip section 213 is used for enclosing, namely plugging, the end part of the prepreg laid on the surface of the flange connecting section 11, so as to prevent the prepreg from flowing out. Therefore, the surrounding strip section 213 is located at the end of the flange pressing plate 21, and the surrounding strip section 213, the flange surface pressing section 211 and the supporting section 212 are sequentially arranged from one end to the other end of the flange pressing plate 21. The end face of the surrounding strip section 213 is higher than the end face of the flange face pressing section 211, and the side face of the surrounding strip section 213 is in contact with the end face of the prepreg to surround the end part of the prepreg, so that the prepreg is prevented from flowing out.
Further, height-adjustable is realized through setting up gasket 3 between the terminal surface of foxing section 213 and the surface of flange joint section 11, and then reaches the quantitative regulation of height between adjustment flange clamp plate 21 and the flange joint section 11 through gasket 3, and then the volume of compression of the prepreg between the quantitative regulation flange joint section.
Example 4
The embodiment 4 is a method for forming a composite material conical shell, which is formed on the basis of any one of the embodiments 1 to 3, and the method adopts the composite material conical shell forming mold of any one of the embodiments 1 to 3, and includes the following steps:
step S1, cleaning the die main body 1, the flange pressing plate 21 and the side pressing plate 22, and coating a release agent after cleaning;
step S2, laying prepreg on the mould main body 1 according to preset requirements, wherein the prepreg is pre-laid with an air felt, a hollow isolation film, a glue absorption felt and the like;
step S3, pressing the flange surface pressing section 211 on the prepreg on the flange connecting section 11, and simultaneously placing the end of the side pressing plate 22 on the supporting section 212 and the inner surface of the side pressing plate 22 on the prepreg surface of the corner part of the mold body 1;
step S4, sleeving a mould main body 1 with the prepreg laid on the surface and a pressing plate 2 covering the prepreg into a vacuum bag;
step S5, conveying the device formed in the step S4 into a hot-pressing tank, vacuumizing the vacuum bag, heating to 120-200 ℃, applying pressure through nitrogen or air, and keeping the vacuum, the temperature and the pressure for a preset time;
and S6, releasing pressure, cooling the formed composite material conical section shell to room temperature, stopping vacuum and demolding.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A composite material conical section shell forming die is characterized by comprising a die body (1) and a pressing plate (2);
the die body (1) is a conical cylinder, an opening at the bottom end of the die body (1) is turned outwards to form a flange connecting section (11), and an included angle alpha between the flange connecting section (11) and the outer surface of the cylinder body of the die body (1) is smaller than 90 degrees;
the pressing plate (2) comprises a flange pressing plate (21) and a side pressing plate (22), the flange pressing plate (21) comprises a flange surface pressing section (211) and a supporting section (212), and the side pressing plate (22) is of an L-shaped structure;
after the prepreg is laid on the surface of the die body (1), the flange surface pressing section (211) covers the surface of the prepreg on the flange connecting section (11), the end part of each side pressure plate (22) is arranged on the supporting section (212), and the inner surface of each side pressure plate (22) is attached to the surface of the prepreg at the corner part of the die body (1).
2. The composite material conical shell molding die of claim 1, wherein the end face of the side platen (22) in contact with the surface of the support section (212) is slidable relative to the surface of the support section (212).
3. The composite material conical shell molding die as claimed in claim 2, wherein the end portions of the side pressing plates (22) are L-shaped, the end transverse plates of the side pressing plates (22) are attached to the horizontal sections of the supporting sections (22), and the end vertical plates of the side pressing plates (22) are located outside the vertical surfaces of the supporting sections (22).
4. The composite material conical shell molding die of claim 3, characterized in that the end risers of the side plates (22) are provided with through holes (220), screws are connected with the supporting sections (212) through the through holes (220), and when the side plates (22) slide relative to the supporting sections (212), the surfaces of the screws are not in contact with the surfaces of the through holes (220).
5. The composite material conical shell molding die according to claim 2, wherein the side pressure plate (22) comprises a flat section (221) and a tapered section (222), the tapered section (222) becomes thinner gradually from one end connected with the flat section (221) to the other end, and the end surface of the flat section (221) is in contact with the surface of the support section (22).
6. The composite material conical section shell molding die of claim 5, wherein the inner surface of the flat section (221) and the inner surface of the conical section (222) are in curvilinear smooth transition.
7. The molding die for the composite material conical shell according to claim 2, wherein the flange pressing plate (21) further comprises a surrounding strip section (213), the surrounding strip section (213) is connected to the outer side of the flange surface pressing section (211), the surrounding strip section (213) and the supporting section (212) are respectively located at two axial ends of the flange surface pressing section (211), the end surface of the surrounding strip section (213) is higher than the end surface of the flange surface pressing section (211), and the side surface of the surrounding strip section (213) higher than the surface of the flange surface pressing section (211) is used for contacting with the end surface of the prepreg.
8. The composite material conical shell molding die according to claim 7, characterized in that a gasket (3) is arranged between the end face of the surrounding strip section (213) and the surface of the flange connecting section (11), and the height of the gasket (3) is adjustable.
9. The forming die for the composite material conical shell according to any one of claims 1 to 8, wherein a plurality of groups of the pressing plates (2) are arranged along the bottom opening ring direction of the die body (1), and the plurality of groups of the pressing plates (2) are arranged at intervals.
10. A method for forming a composite material conical shell, which is characterized in that the composite material conical shell forming die as claimed in any one of claims 1 to 9 is adopted, and the method comprises the following steps:
step S1, cleaning the die main body (1), the flange pressing plate (21) and the side pressing plate (22), and coating a release agent after cleaning;
step S2, laying prepreg on the mould main body (1) according to preset requirements;
step S3, pressing the flange surface pressing section (211) on the prepreg on the flange connecting section (11), and simultaneously placing the end part of a side pressure plate (22) on the supporting section (212) and adhering the inner surface of the side pressure plate (22) to the prepreg surface of the corner part of the mould main body (1);
step S4, sleeving the mould main body (1) with the prepreg laid on the surface and the pressing plate (2) covering the prepreg into a vacuum bag;
step S5, conveying the device formed in the step S4 into a hot-pressing tank, vacuumizing the vacuum bag, heating to 120-200 ℃, applying pressure through nitrogen or air, and keeping the vacuum, the temperature and the pressure for a preset time;
and S6, releasing pressure, cooling the formed composite material conical section shell to room temperature, stopping vacuum and demolding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110406419.7A CN113211821B (en) | 2021-04-15 | 2021-04-15 | Composite material conical section shell forming die and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110406419.7A CN113211821B (en) | 2021-04-15 | 2021-04-15 | Composite material conical section shell forming die and method thereof |
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| CN113211821A true CN113211821A (en) | 2021-08-06 |
| CN113211821B CN113211821B (en) | 2022-11-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114536806A (en) * | 2021-12-24 | 2022-05-27 | 江苏海锋能源科技有限公司 | Resin flow guiding edge-cutting-free process |
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