CN103909658B - Composite material connecting skirt forming method and mold and inner rubber core mold forming mold - Google Patents
Composite material connecting skirt forming method and mold and inner rubber core mold forming mold Download PDFInfo
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- CN103909658B CN103909658B CN201410121135.3A CN201410121135A CN103909658B CN 103909658 B CN103909658 B CN 103909658B CN 201410121135 A CN201410121135 A CN 201410121135A CN 103909658 B CN103909658 B CN 103909658B
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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
- B29C70/30—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
- B29C70/36—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 impregnating by casting, e.g. vacuum casting
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a composite material containing skirt forming method and mold and an inner rubber core mold forming mold. The method comprises the following steps: (1) manufacturing the forming mold, namely manufacturing an outer mold, an inner mold and the inner rubber core mold and sheathing the inner rubber core mold on the outer wall of the inner mold; (2) laying up; (3) preheating and vacuumizing the forming mold; (4) carrying out resin pretreatment; (5) injecting glue and solidifying, namely solidifying resin after glue injection, wherein the inner rubber core mold is expanded along with the increase of temperature to uniformly pressing a preform and enable the resin to fully infiltrate the preform; and (6) demolding and trimming. The forming mold structure adopts the inner rubber core mold; silicone rubber is adopted and a resin transfer molding (RTM) process is assisted to form the composite material containing skirt, and a double-sided mold is adopted, so that a product has the advantages of stable dimension, good quality consistence, controllable fiber and resin contents and the like; measures such as co-solidification and the adoption of the expandable core mold are adopted to reduce the porosity, increase the volume content of the fibers of the product and improve the mechanical property.
Description
Technical field
The present invention relates to solid rocket motor case forming technique, in particular to a kind of molding of composite joint skirt
Method, mould and its rubber inner core mould.
Background technology
Solid rocket motor case joint skirt is the overall extension of housing, for realize guided missile interstage section connect or and its
The connection of his part, joint skirt need to undergo axle pressure, moment of flexure, shearing, and various load such as intrinsic pressure, and stressing conditions are more complicated, such as
In the case of where not increasing joint skirt weight, simplify moulding process, and improve its performance, to whole motor body performance
Raising it is most important.
At present, composite joint skirt generally carries out molding using " prepreg overlay+winding " forming method, the molding
Method exposes in process of production following problem：1）Only one of which rigidity formpiston in forming process, and product external surfaces adopt
Pressurizeed with silvalin winding, when have Le trace, a projection, and depression etc. occurs, it is impossible to ensures the fineness of product external surfaces, and then produces
Product overall dimensions are difficult to ensure that；2）, using manual frictioning control, which is larger to fibre damage, and frictioning degree for resin content
It is wayward, very big is affected on motor body gross weight and specific impulse；3）Cannot composite of the molding with reinforcing rib structure
Joint skirt, product structure is less efficient；4）Joint skirt corner fiber is easily maked somebody a mere figurehead, is layered and fold, at present using increasing peace
The conservative design mode of overall coefficient does not produce breakage guaranteeing that this is under service load, but this mode reduce further it is multiple
Close structure efficiency of skirt etc..
The content of the invention
Present invention aim to provide a kind of forming method of composite joint skirt, mould and its rubber inner core mould
Mould, with composite joint skirt excellent in mechanical performance obtained in the forming method and its mould, fiber volume fraction is high,
Simultaneously moulding process is simple, easy to operate.
For achieving the above object, the technical solution used in the present invention is：A kind of composite joint skirt forming method, including
Following steps：
1）Make mould：Make external mold, internal model, and rubber inner core mould, the profile of the rubber inner core mould with it is compound
The interior shape cooperation of material joint skirt, the interior shape of the external mold and the form fit of composite joint skirt, the profile of the internal model
Coordinate with the interior shape of the rubber inner core mould；Then the uniform application releasing agent on the internal model outer wall, by the rubber inner core
Die sleeve is loaded on the internal model outer wall；
2）Laying：Fibre reinforced materials are cut into into different size and angle and painting is spread after setting agent, it is successively spread
It is overlying on the rubber inner core mould, is coated with to certain thickness compacting, until corrugationless, obtains preform；
3）Mould is preheated and evacuation：The external mold and internal model are carried out into matched moulds assembling, then adds mould
Heat simultaneously carries out evacuation process；
4）Resin pretreatment：By the uniform rear evacuation of resin agitating；
5）Injecting glue and solidification：Pretreated resin is injected in die cavity carries out molding；Injecting glue is carried out resin after finishing
Elevated cure, rubber inner core mould expands as temperature is raised, and uniform pressurization is carried out to preform, so that resin fully soaks
Profit preform；
6）The demoulding and pruning：After the demoulding, overlap pruning is carried out to molded body, obtain composite joint skirt.
Further, the step 1）In, the forming method of the rubber inner core mould is comprised the following steps：
A, preparation rubber glue：By rubber latex：Vulcanizing agent=90～99%：1～10% mass ratio prepares rubber glue
Liquid, by rubber liquid cement agitation it is uniform after be evacuated to -10～-20Kpa, 30～60min of pressurize, to no longer occurring compared with after gross blow hole
Take out stand-by；
B, rubber inner core mold forming：Rubber glue is injected in rubber inner core mould carries out molding；
C, sulfuration and the demoulding：By rubber glue 22～26h of natural vulcanization at room temperature, 95～100 DEG C of guarantors are then heated to
1.0～1.5h of temperature, is finally warming up to 195～205 DEG C of 1.0～1.5h of insulation；The demoulding after room temperature is cooled to, rubber inner core is obtained
Mould.
Further, the step 2）In, laying angle is 0 °, ± 15 °, ± 30 °, ± 45 °, ± 60 ° and 90 °.
Further, the step 5）In, resin implantation temperature is 20～150 DEG C, and injection pressure is 0.1～0.8MPa.
Further, the step 5）In, resin curing conditions are：100～150 DEG C of 1～4h of insulation, then heat to
180～200 DEG C of 1～4h of insulation, are finally warming up to 210～250 DEG C of 2～10h of insulation.
Further, the step 1）In, the moulding material of the rubber inner core mould is R10301 silicone rubber；The demoulding
Agent is silicone grease or PMR-70.
Further, the step 2）In, the fibre reinforced materials are glass fabric or carbon cloth.
Further, the step 4）In, the resin is bismaleimide resin or epoxy resin.
A kind of composite joint skirt mould designed to realize said method, including internal model and external mold, it is described
Coaxial laminating on internal model outer wall is set with rubber inner core mould, and the external mold coaxial package is in the periphery of the rubber inner core mould, institute
State internal model top and be connected with pressing plate, the top surface of the pressing plate is connected with the top of the external mold, and the bottom of the internal model is connected with water conservancy diversion
Plate, the bottom of deflector is connected with cover plate, the periphery of the cover plate along be connected with the bottom of the external mold, the rubber inner core mould and
The external mold, internal model, pressing plate, and deflector surrounds joint skirt shaping mold cavity, is provided with what is connected with the die cavity on the cover plate
Gum-injecting port, the outer mold top is provided with the gum exudation mouth connected with the die cavity.
A kind of rubber inner core mould of the composite joint skirt molding designed to realize said method, including
Molding internal model, the periphery coaxial sleeve of the molding internal model is equipped with the first external mold, and molding internal model top outer is connected with outside second
Mould, the internal model, the first external mold, and the second external mold surround rubber inner core mold forming die cavity, and second external mold is provided with discharging
Mouthful.
Compared with prior art, the invention has the advantages that：
First, the present invention carries out the molding of composite joint skirt using silicone rubber assisted RTM technique, due to using two-sided
Making mold so that product has dimensionally stable, quality conformance good, and the advantages of fiber and controllable resin content, solves
The wayward problem of frictioning degree that manual frictioning is caused, it also avoid built on stilts joint skirt corner fiber, layering and fold
Phenomenon；Simultaneously product porosity is reduced using the means such as co-curing and expandable rubber core, improve the corpus fibrosum of product
Product content and mechanical property.
Second, this forming method integrated molding, the apparent color and luster of product is homogeneous, and internal bonding is good, high precision, without the need for right
The fibrous layer machine of carrying out adds, it is to avoid machine adds the damage to fiber；And the composite joint skirt that reinforcing rib structure can be carried with molding,
Improve product structure efficiency compared with.
Third, mould adopts rubber pattern as inner core die, in the curing process, with temperature rising, rubber inner core
Mould expands, and carries out uniform pressurization to preform in whole process so that resin fully infiltrates preform, it is ensured that in product
Portion's resin is uniformly distributed, and improves the fiber volume fraction of product, while substantially increasing the mechanical property of material.
Description of the drawings
Fig. 1 is a kind of cross-sectional view of composite joint skirt mould.
Fig. 2 is a kind of cross-sectional view of rubber inner core mould.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is described in further detail, is easy to more clearly understand this
It is bright, but they do not constitute restriction to the present invention.
It is a kind of composite joint skirt mould used in following examples shown in Fig. 1, including internal model 1 and outer
Mould 2, coaxial laminating on the outer wall of internal model 1 is set with rubber inner core mould 3, and the coaxial package of external mold 2 is interior in the periphery of rubber inner core mould 3
The top of mould 1 is connected with pressing plate 4, and the top surface of pressing plate 4 is connected with the top of external mold 2, and the bottom of internal model 1 is connected with deflector 5, deflector 5
Bottom be connected with cover plate 6, the periphery of cover plate 6 along be connected with the bottom of external mold 2, rubber inner core mould 3 and external mold 2, internal model 1, pressing plate
4, and deflector 5 surrounds joint skirt shaping mold cavity 7, and the gum-injecting port 8 connected with die cavity 7 is provided with cover plate 6, the top of external mold 2 is provided with
The gum exudation mouth 9 connected with die cavity 7, is provided with the seal groove 10 for installing sealing strip between the top surface of internal model 1 and the bottom surface of pressing plate 4, lead
Seal groove is also had between stream plate 5 and cover plate 6, between deflector 5 and the bottom surface of internal model 1.
It is a kind of rubber inner core mould used in following examples shown in Fig. 2, including molding internal model 14, into
The periphery coaxial sleeve of type internal model 14 is equipped with the first external mold 15, and the top outer of molding internal model 14 is connected with the second external mold 16, internal model 14, the
One external mold 15, and the second external mold 16 surrounds rubber inner core mold forming die cavity 17, the second external mold 16 is provided with discharge port 18.
Embodiment 1
The motor body manufactured in the present embodiment size and performance parameter such as table 1 below of composite joint skirt：
Table 1
| Sequence number | Project | Unit | Index |
| 1 | Flange inner diameter | mm | φ400.0 |
| 2 | End face wall thickness | mm | 6.0 |
| 3 | Skirt height | mm | 100.0 |
| 4 | Cylinder section wall thickness | mm | 3.0 |
| 5 | Axle pressure | kN | ≥500.0 |
| 6 | Fiber volume fraction | % | ≥60 |
Should
The forming method of composite joint skirt is comprised the following steps：
1）Make mould：Make external mold, internal model, and rubber inner core mould, the profile of the rubber inner core mould with it is compound
The interior shape cooperation of material joint skirt, the interior shape of the external mold and the form fit of composite joint skirt, the profile of the internal model
Coordinate with the interior shape of the rubber inner core mould；Then one layer of releasing agent of uniform application on the internal model outer wall, releasing agent is silicon
Fat or PMR-70, by the rubber inner core die sleeve internal model outer wall is loaded on；
Wherein, the process using rubber inner core mould molded rubber inner core die is as follows：
A, preparation rubber glue：Using R10301 rubber, according to rubber latex：Vulcanizing agent=90～99%：1～10%, preferably
90%：10% mass ratio prepares 5kg rubber glues, stirs, and at ambient temperature rubber glue is put into into vacuum tank, takes out
Vacuum to vacuum is -10～-20Kpa, preferably -10Kpa, 30～60min of pressurize, preferred 30min, to no longer occurring compared with air
Take out behind hole stand-by；
B, rubber inner core mold forming：Molding inner mould surface is cleaned out into rear uniform application silicone grease, then respectively with first
External mold and the second external mold are assembled, and rubber glue is carried out into molding from discharge port injection rubber inner core mould；
C, sulfuration and the demoulding：Injecting glue is finished, by rubber glue 22～26h of natural vulcanization, preferred 24h at room temperature；Then
95～100 DEG C are warming up to, preferably 100 DEG C, 1.0～1.5h, preferred 1.0h is incubated；Finally it is warming up to 195～205 DEG C, preferably 200
DEG C, it is incubated 1.0～1.5h, preferred 1h；The demoulding after room temperature is naturally cooled to, rubber inner core mould is obtained；
2）Preform laying：40 blocks of carbon cloths of cutting or glass fabric apply spread after setting agent according to（0°）2/
（± 15 °, ± 30 °, ± 45 °, ± 60 °）9/90°2Order, be successively coated with from the inside to the outside on rubber inner core mould（Fiber laying
0 ° of direction is defined as internal model ring）, it is coated with to end face wall thickness 6.0mm, cylinder section wall thickness 3.0mm, prune away excess fiber cloth, adopts
Vacuum bag coated after evacuation compacting, until all of fiber be compacted, corrugationless, that is, obtain preform；
3）Mould is preheated and evacuation：The external mold 2 and internal model 1 are carried out into matched moulds assembling, i.e.,：First in internal model 1
Sealing strip is loaded onto in seal groove 10, then pressing plate 4 and internal model 1 fastened by the first screw 11 successively, by external mold 2 with press
Plate 4 is fastened, is fastened deflector 5 with internal model 1 by the second screw 12, finally cover plate 6 and external mold 2 is passed through into the 3rd
Screw 13 is fastened；Then mould is heated to into 130 DEG C, and carries out evacuation process；
4）Resin pretreatment：By bismaleimide resin at 20～150 DEG C, evacuation after stirring at preferably 130 DEG C；
5）Injecting glue and solidification：By pretreated bismaleimide resin in 0.1～0.8MPa, from two under preferred 0.5MPa pressure
Injecting in die cavity simultaneously in gum-injecting port carries out molding, after injecting glue is finished, resin is solidified according to following curing cycle：100
～150 DEG C, preferably 150 DEG C, it is incubated 1～4h, preferred 4h；180～200 DEG C are then heated to, preferably 180 DEG C, 1～4h is incubated,
It is preferred that 2h；210～250 DEG C are finally warming up to, preferably 220 DEG C, 2～10h, preferred 6h is incubated, rubber inner core mould is with temperature liter
It is high and expand, uniform pressurization is carried out to preform, so that resin fully infiltrates preform；
6）The demoulding and pruning：Overlap pruning is carried out to composite joint skirt product, composite joint skirt finished product is obtained.
After testing, the performance indications such as table 2 below of the composite joint skirt of above-mentioned molding：
Table 2
| Sequence number | Project | Unit | As a result |
| 1 | Axle pressure | kN | 620.7 |
| 2 | Fiber volume fraction | % | 65.0 |
From the data in table 2, it can be seen that obtained composite joint skirt mechanical property is good, fiber volume fraction is big.
Embodiment 2
The motor body manufactured in the present embodiment size and performance parameter such as table 3 below of composite joint skirt：
Table 3
| Sequence number | Project | Unit | Index |
| 1 | Flange inner diameter | mm | φ1200 |
| 2 | End face wall thickness | mm | 12.0 |
| 3 | Skirt height | mm | 250.0 |
| 4 | Cylinder section wall thickness | mm | 8.0 |
| 5 | Axle pressure | kN | ≥1000.0 |
| 6 | Fiber volume fraction | % | ≥60 |
The forming method of the composite joint skirt is comprised the following steps：
1）Make mould：Make external mold, internal model, and rubber inner core mould, the profile of the rubber inner core mould with it is compound
The interior shape cooperation of material joint skirt, the interior shape of the external mold and the form fit of composite joint skirt, the profile of the internal model
Coordinate with the interior shape of the rubber inner core mould；Then one layer of releasing agent of uniform application on the internal model outer wall, by the rubber
Inner core die is set in the internal model outer wall；
Wherein, the process using rubber inner core mould molded rubber inner core die is as follows：
A, preparation rubber glue：Using R10301 rubber, according to rubber latex：Vulcanizing agent=95%：5% mass ratio is matched somebody with somebody
5kg rubber glue processed, stirs, and at ambient temperature rubber glue is put into into vacuum tank, be evacuated to vacuum for-
20Kpa, pressurize 45min, to no longer occurring compared with taking out stand-by after gross blow hole；
B, rubber inner core mold forming：By the removing surface of molding internal model 14 it is clean after uniform application silicone grease, then respectively with the
One external mold 15 and the second external mold 16 are assembled, and rubber glue is injected in rubber inner core mould from discharge port 18 to be carried out
Molding；
C, sulfuration and the demoulding：Injecting glue is finished, and by rubber glue natural vulcanization 24h at room temperature, then heats to 100 DEG C of guarantors
Warm 1.0h, is finally warming up to 200 DEG C of insulation 1h；The demoulding after room temperature is naturally cooled to, rubber inner core mould is obtained；
2）Preform laying：80 blocks of carbon cloths of cutting, painting spread after setting agent according to（0°）4/（± 15 °, ± 30 °,
± 45 °, ± 60 °）18/90°4Order, be successively coated with from the inside to the outside on rubber inner core mould（0 ° of direction of fiber laying is defined as
Internal model ring）, it is coated with to end face wall thickness 12.0mm, cylinder section wall thickness 8.0mm, prune away excess fiber cloth, is carried out using vacuum bag
After cladding evacuation compacting, until all of fiber be compacted, corrugationless, that is, obtain preform；
3）Mould evacuation：The external mold and internal model are carried out into matched moulds assembling, i.e.,：It is built-in in internal model seal groove first
Upper sealing strip, then successively pressing plate and internal model fastened by screw 2, external mold and pressing plate are fastened by screw 1,
Deflector is fastened with internal model, finally cover plate is fastened by screw 3 with external mold；Then mould is taken out
Application of vacuum；
4）Resin pretreatment：Epoxy resin is stirred at room temperature into uniform rear evacuation；
5）Injecting glue and solidification：Pretreated epoxy resin is injected simultaneously under 0.3MPa pressure from two gum-injecting ports
Molding is carried out in die cavity, after injecting glue is finished, resin is solidified according to following curing cycle：80 DEG C of insulation 4h, then heat up
To 100 DEG C of insulation 4h, 120 DEG C of insulation 6h are finally warming up to, rubber inner core mould expands as temperature is raised, preform is entered
Row uniform pressurization, so that resin fully infiltrates preform；
6）The demoulding and pruning：Overlap pruning is carried out to composite joint skirt product, composite joint skirt finished product is obtained.
After testing, the performance indications such as table 4 below of the composite joint skirt of above-mentioned molding：
Table 4
| Sequence number | Project | Unit | As a result |
| 1 | Axle pressure | kN | 1427.0 |
| 2 | Fiber volume fraction | % | 72.1 |
From the data in table 4, it can be seen that obtained composite joint skirt mechanical property is good, fiber volume fraction is big.
Claims (7)
1. a kind of composite joint skirt forming method, comprises the following steps：
1) mould is made：Make external mold, internal model, and rubber inner core mould, the profile and composite of the rubber inner core mould
The interior shape cooperation of joint skirt, the interior shape of the external mold and the form fit of composite joint skirt, the profile of the internal model and institute
The interior shape for stating rubber inner core mould coordinates；Then the uniform application releasing agent on the internal model outer wall, by the rubber inner core die sleeve
Loaded on the internal model outer wall；
2) laying：By fibre reinforced materials be cut into different size and angle and painting spread after setting agent, it is successively coated with
On the rubber inner core mould, compacting is coated with to certain thickness, until corrugationless, obtains preform；Laying angle is 0 °, ±
15 °, ± 30 °, ± 45 °, ± 60 ° and 90 °；
3) mould preheating and evacuation：The external mold and internal model are carried out into matched moulds assembling, then mould is heated simultaneously
Carry out evacuation process；
4) resin pretreatment：By the uniform rear evacuation of resin agitating；
5) injecting glue and solidification：Pretreated resin is injected in die cavity carries out molding；Injecting glue is heated up resin after finishing
Solidification, rubber inner core mould expands as temperature is raised, and uniform pressurization is carried out to preform, so that resin fully infiltrates pre-
Molded body；Resin curing conditions are：100～150 DEG C of 1～4h of insulation, then heat to 180～200 DEG C of 1～4h of insulation, finally
It is warming up to 210～250 DEG C of 2～10h of insulation；
6) demoulding and pruning：After the demoulding, overlap pruning is carried out to molded body, obtain composite joint skirt；
The step 1) in, the forming method of the rubber inner core mould is comprised the following steps：
A, preparation rubber glue：By rubber latex：Vulcanizing agent=90～99%：1～10% mass ratio prepares rubber glue,
By rubber liquid cement agitation it is uniform after be evacuated to -10～-20Kpa, 30～60min of pressurize, to no longer occurring being taken compared with after gross blow hole
Go out stand-by；
B, rubber inner core mold forming：Rubber glue is injected in rubber inner core mould carries out molding；
C, sulfuration and the demoulding：By rubber glue 22～26h of natural vulcanization at room temperature, 95～100 DEG C of insulations 1.0 are then heated to
～1.5h, is finally warming up to 195～205 DEG C of 1.0～1.5h of insulation；The demoulding after room temperature is cooled to, rubber inner core mould is obtained.
2. composite joint skirt forming method according to claim 1, it is characterised in that：The step 5) in, resin
Implantation temperature is 20～150 DEG C, and injection pressure is 0.1～0.8MPa.
3. composite joint skirt forming method according to claim 1, it is characterised in that：The step 1) in, it is described
The moulding material of rubber inner core mould is R10301 silicone rubber；The releasing agent is silicone grease or PMR-70.
4. composite joint skirt forming method according to claim 1, it is characterised in that：The step 2) in, it is described
Fibre reinforced materials are glass fabric or carbon cloth.
5. composite joint skirt forming method according to claim 1, it is characterised in that：The step 4) in, it is described
Resin is bismaleimide resin or epoxy resin.
6. a kind of composite joint skirt mould designed to realize claim 1 methods described, including internal model (1) and
External mold (2), it is characterised in that：Coaxial laminating on internal model (1) outer wall is set with rubber inner core mould (3), and the external mold (2) is same
Axle sleeve is mounted in the periphery of the rubber inner core mould (3), and internal model (1) top is connected with pressing plate (4), the top surface of the pressing plate (4)
It is connected with the top of the external mold (2), the bottom of the internal model (1) is connected with deflector (5), and the bottom of the deflector (5) connects
Have a cover plate (6), the periphery of the cover plate (6) along being connected with the bottom of the external mold (2), the rubber inner core mould (3) with it is described
External mold (2), internal model (1), pressing plate (4), and deflector (5) surrounds joint skirt shaping mold cavity (7), be provided with the cover plate (6) with
The gum-injecting port (8) of die cavity (7) connection, external mold (2) top is provided with the gum exudation mouth (9) connected with the die cavity (7).
7. a kind of rubber inner core mold forming mould of the composite joint skirt molding designed to realize claim 1 methods described
Tool, it is characterised in that：Including molding internal model (14), the periphery coaxial sleeve of the molding internal model (14) is equipped with the first external mold (15),
Molding internal model (14) top outer is connected with the second external mold (16), the internal model (14), the first external mold (15), and the second external mold
(16) rubber inner core mold forming die cavity (17) is surrounded, second external mold is provided with discharge port (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410121135.3A CN103909658B (en) | 2014-03-28 | 2014-03-28 | Composite material connecting skirt forming method and mold and inner rubber core mold forming mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410121135.3A CN103909658B (en) | 2014-03-28 | 2014-03-28 | Composite material connecting skirt forming method and mold and inner rubber core mold forming mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103909658A CN103909658A (en) | 2014-07-09 |
| CN103909658B true CN103909658B (en) | 2017-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410121135.3A Active CN103909658B (en) | 2014-03-28 | 2014-03-28 | Composite material connecting skirt forming method and mold and inner rubber core mold forming mold |
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| CN102700150B (en) * | 2012-05-14 | 2014-04-16 | 湖北三江航天江北机械工程有限公司 | Molding method of wall-thickness-variable composite connection skirt |
| CN103214847B (en) * | 2013-03-20 | 2015-05-13 | 湖北三江航天江北机械工程有限公司 | Silicon rubber mold for integral moulding of composite skirt and preparation method |
| CN203214193U (en) * | 2013-04-22 | 2013-09-25 | 湖北航天技术研究院总体设计所 | Angle box for composite skirt of solid rocket engine |
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