CN221021934U - Combined die for molding closed composite material bracket - Google Patents
Combined die for molding closed composite material bracket Download PDFInfo
- Publication number
- CN221021934U CN221021934U CN202322478068.8U CN202322478068U CN221021934U CN 221021934 U CN221021934 U CN 221021934U CN 202322478068 U CN202322478068 U CN 202322478068U CN 221021934 U CN221021934 U CN 221021934U
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- Prior art keywords
- composite material
- mold
- molding
- die
- closed
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- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 238000000465 moulding Methods 0.000 title claims abstract description 20
- 229920001971 elastomer Polymers 0.000 claims abstract description 37
- 238000007599 discharging Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 2
- 229910021485 fumed silica Inorganic materials 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000004816 latex Substances 0.000 claims description 2
- 229920000126 latex Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 3
- 239000011148 porous material Substances 0.000 claims 1
- 238000000748 compression moulding Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model provides a combined die for molding a closed composite material bracket, which is characterized in that: the novel composite material comprises a main body outer die, an outer die cover plate, a rubber air bag assembly and a soluble core die, wherein the outer die cover plate is connected, the rubber air bag assembly is placed in a step through hole formed in the outer die cover plate, a prefabricated body composite material support is laid outside the rubber air bag assembly, the prefabricated body composite material support is placed in an inner cavity of the main body outer die, and the soluble core die is placed inside the rubber air bag assembly. The combined die for molding the closed composite material bracket is convenient for compression molding of the closed composite material bracket, and convenient for demolding of an internal core die, ensures the overall dimension of the composite material bracket, and reduces the processing and assembling difficulty of the subsequent composite material bracket.
Description
Technical Field
The utility model relates to the technical field of molding of composite structural members for spaceflight, in particular to a combined die for molding a closed composite bracket.
Background
The composite material support is used as a main bearing unit of a composite material component for the space satellite, needs to bear various mechanical loads of the space vehicle in the launching and running processes, has more severe requirements on structural strength and rigidity, and also needs to reduce weight as much as possible.
However, the closed composite material bracket is not easy to demould after being molded, and in order to facilitate the subsequent demould, the traditional internal core mold mostly adopts a soluble core mold, low-melting point alloy and the like. When the soluble core mould and the low melting point are used as the internal core mould, the forming pressure is required to be provided from the outside of the composite material bracket, but the external dimension of the formed part is uncontrollable.
In order to better control the external dimension of the workpiece, the traditional internal core mould can be replaced by a rubber air bag, the composite material support is pressurized from the inside, foam materials are filled in the rubber air bag to serve as supports for conveniently paving the composite material, and the foam materials cannot be completely removed from the closed composite material support.
Disclosure of Invention
The utility model relates to a combined die for molding a closed composite material bracket, which is provided for facilitating the demolding of the closed composite material bracket and ensuring the external dimension and the internal quality of the closed composite material bracket by adopting a soluble core die and a rubber air bag to be matched.
A closed composite material support forming mold assembly comprising: the outer die cover plate is connected with the outer die, the step through holes are formed in the outer die cover plate to place the rubber airbag assembly, the prefabricated body composite material support is laid outside the rubber airbag assembly, the prefabricated body composite material support is placed in the inner cavity of the outer die of the main body, and the soluble core die is placed inside the rubber airbag assembly.
The main body outer die is provided with a plurality of threaded holes, a plurality of through holes are formed in the main body outer die, and the main body outer die are fastened and connected through screws.
The rubber air bag assembly consists of an integral rubber air bag and an air charging and discharging nozzle, and a soluble core mould is arranged in the integral rubber air bag;
The soluble core mold consists of organic resin which is easy to dissolve in water, quartz sand, fumed silica and chopped glass fiber, and the surface of the soluble core mold is coated with a hole sealing coating.
In a preferred embodiment of the utility model, the main body outer mold is of female mold structure, and the contour of the inner cavity of the main body outer mold is consistent with the contour of the prefabricated body composite material bracket.
In a preferred embodiment of the utility model, the main body outer mold cavity has a draft angle of 1 ° -3 °.
In a preferred embodiment of the utility model, the integral rubber balloon belongs to a thin-wall latex balloon, and the thickness is 0.75-2mm.
In a preferred embodiment of the utility model, a gap of 1-3mm is reserved between the profile of the integral rubber balloon and the inner cavity of the cured preform composite material bracket.
In a preferred embodiment of the utility model, the contact position of the air charging and discharging nozzle and the integral rubber air bag is provided with a two-stage sealing ring.
In a preferred embodiment of the present utility model, the pressure resistance of the soluble core mold is 1 to 3MPa.
In a preferred embodiment of the present utility model, the soluble core form remains readily soluble in water after being heated at high temperatures.
The utility model relates to a combined die for molding a closed composite material bracket, which is convenient for compression molding of the closed composite material bracket, and demolding of an internal core die, ensures the overall dimension of the composite material bracket, and reduces the processing and assembling difficulty of the subsequent composite material bracket.
Drawings
Fig. 1 is a schematic view of a mold assembly for molding a closed composite material bracket.
Fig. 2 is a schematic cross-sectional view of a mold assembly for molding a closed composite material bracket.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
A combined die for molding a closed composite material bracket comprises: the main body outer mold 100, the outer mold cover 200, the integral rubber bladder 410, the air charging and discharging nozzle 420 and the soluble core mold 500.
Referring to fig. 1 and 2, a hole sealing coating is coated on the surface of a soluble core mold 500, an integral rubber air bag 410 is coated, a carbon fiber prepreg is paved outside the integral rubber air bag 410 to obtain a prefabricated body composite material bracket 300, the paved integral is placed in the inner cavity of a main body outer mold 100 together, and fastening connection is performed by screws through threaded holes arranged on the main body outer mold 100 and through holes on an outer mold cover plate 200; the integral rubber airbag 410 has certain elasticity, can stretch and deform, stretches the opening of the integral rubber airbag 410 to pass through a step through hole formed in the outer mold cover plate 200, and is provided with an air charging and discharging nozzle 420 at the opening position of the integral rubber airbag 410, the air charging and discharging nozzle 420 is provided with two stages of sealing rings, and during installation, polytetrafluoroethylene films are used for winding and coating with tension, so that the sealing between the integral rubber airbag 410 and the air charging and discharging nozzle 420 is ensured.
And finally, placing the combined die for molding in an oven for heating and curing, wherein the curing temperature is 178 ℃, a high-pressure nitrogen cylinder is used in the curing process, the whole rubber air bag 410 is inflated through an inflation and deflation nozzle 420, the inflation pressure is 0.6-1MPa, the inflated whole rubber air bag 410 uniformly applies molding pressure to the prefabricated body composite material bracket 300, the internal quality of a finished piece is ensured, and the outer dimension precision of the prefabricated body composite material bracket 300 is ensured by the inner cavity of the main body outer die 100. After curing, the main body outer mold 100 and the outer mold cover plate 200 are removed, the air filling and discharging nozzle 420 is removed, the soluble core mold 500 in the integral rubber air bag 410 is flushed by a high-pressure water gun, the air filling and discharging nozzle 420 is reinstalled, the air in the integral rubber air bag 410 is pumped by a vacuum pump, and the integral rubber air bag 410 can be easily separated from the cured preform composite material bracket 300 after being contracted.
Claims (9)
1. The utility model provides a closed combined material support forming is with assembling die, a serial communication port, including main part external mold (100), external mold apron (200), rubber gasbag subassembly (400), soluble mandrel (500), main part external mold (100) are connected external mold apron (200), external mold apron (200) set up the step through-hole and place rubber gasbag subassembly (400), prefabricated body combined material support (300) are laid to rubber gasbag subassembly (400) outside, prefabricated body combined material support (300) are placed in the inner chamber of main part external mold (100), soluble mandrel (500) are placed to rubber gasbag subassembly (400) inside.
2. The combined die for molding the closed composite material bracket according to claim 1, wherein a plurality of threaded holes are formed in the main body outer die (100), a plurality of through holes are formed in the outer die cover plate (200), and the main body outer die and the outer die cover plate are fastened and connected through screws.
3. A composite material support forming mold according to claim 1, wherein the main body outer mold (100) is of female mold structure, and has an inner cavity contour which is identical to the outer contour of the prefabricated composite material support (300) and has a draft angle of 1 ° -3 °.
4. The mold assembly for molding a closed composite material bracket according to claim 1, wherein the rubber bladder assembly (400) is composed of an integral rubber bladder (410) and an inflation/deflation nozzle (420).
5. The assembling die for molding the closed composite material bracket according to claim 4, wherein the integral rubber air bag (410) belongs to a thin-wall latex air bag, and has a thickness of 0.75-2mm.
6. The mold assembly for molding a closed composite material stent according to claim 4, wherein the overall rubber balloon (410) has a contour and a clearance of 1-3mm from the inner cavity of the cured preform composite material stent (300).
7. The mold assembly for molding a closed type composite material bracket according to claim 4, wherein the two-stage sealing ring is provided at a contact position of the air charging/discharging nozzle (420) and the integral rubber bag (410).
8. The composite material support molding die set as claimed in claim 1, wherein the soluble core mold (500) is composed of an organic resin or quartz sand or fumed silica or chopped glass fiber which is easily dissolved in water, and the surface thereof is coated with a pore sealing coating, and the soluble core mold (500) is easily dissolved in water after being heated at high temperature.
9. The mold assembly for molding a closed composite material scaffold according to claim 1, wherein the pressure resistance of the soluble core mold (500) is 1-3MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322478068.8U CN221021934U (en) | 2023-09-13 | 2023-09-13 | Combined die for molding closed composite material bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322478068.8U CN221021934U (en) | 2023-09-13 | 2023-09-13 | Combined die for molding closed composite material bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221021934U true CN221021934U (en) | 2024-05-28 |
Family
ID=91181872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322478068.8U Active CN221021934U (en) | 2023-09-13 | 2023-09-13 | Combined die for molding closed composite material bracket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221021934U (en) |
-
2023
- 2023-09-13 CN CN202322478068.8U patent/CN221021934U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |