CN102285059B - Molding method and mold used in resin transfer molding technology of cable rectifying cover - Google Patents

Molding method and mold used in resin transfer molding technology of cable rectifying cover Download PDF

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CN102285059B
CN102285059B CN201110247501.6A CN201110247501A CN102285059B CN 102285059 B CN102285059 B CN 102285059B CN 201110247501 A CN201110247501 A CN 201110247501A CN 102285059 B CN102285059 B CN 102285059B
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resin
mold
die
molding
mould
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CN102285059A (en
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洪强
郝晶莹
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Beijing Aerospace Xinfeng Machinery Equipment Co Ltd
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Beijing Aerospace Xinfeng Machinery Equipment Co Ltd
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Abstract

The invention provides a molding method and a mold used in resin transfer molding technology of a cable rectifying cover. The molding method and the mold are used for integrally molding sheet metal parts and the heat-proof layer. The molding method comprises the steps of: mold treatment, precast of sheet metal parts, laying of fiber reinforcement, mold assembly, pipe connection, airtight inspection, resin heating, mold heating, pressure injection of resin, curing and demolding. The mold comprises a lower pressure plate (1), a male die (2), a female die (3), an upper pressure plate (4), seal rings (5), a resin impregnating connector (6), a small nut (7), a screw rod (8), a big nut (9) and a resin discharging connector (10), wherein the cavities of the female die (3) and the male die (2) are matched with the cable rectifying cover in shape; and the surfaces of the male die (2), the female die (3) and the lower pressure plate (1) contacted with the male die (2) are respectively provided with a rectangular seal groove used for installing the seal ring (5). By utilizing the molding method and the mold disclosed by the invention, the molding efficiency is high, and the quality is stable.

Description

A kind of resin moulded crimping and transfer processes forming method and mould of cable radome fairing
Technical field
The present invention relates to a kind of technological forming method and mould of radome fairing, specifically, the present invention is a kind of resin moulded crimping and transfer processes forming method and mould of cable radome fairing.
Background technology
In space flight and aviation and some job that requires special skills field, due to the requirement of equipment working environment high temperature, it is heat insulation that so need leak electricity outside, radome fairing is installed in the outside of cable, because cable radome fairing must meet certain resistance to compression, anti-deformation and the good requirement of following process, so general cable radome fairing is to be fixedly connected with and to be obtained by the metal metal plate part b of bottom and the heat shield a on top as shown in Figure 1, heat shield is by resin moulded transmission method moulding by fibre reinforcement.
General cable radome fairing moulding technique has two kinds, a kind of forming method is to be directly heat shield by resin moulded fibre reinforcement transfer molding, then adopt the mode of glueing joint that metal metal plate part is fixedly connected with the heat shield of moulding, but under hot conditions, glued joint easy unsticking, layering, institute in this way can not be connected metal metal plate part with heat shield well, and complex procedures.
Another kind is by resin moulded crimping and transfer processes method global formation by metal metal plate part and fibre reinforcement, the i.e. direct correct position to the punch of mould by built-in metal metal plate part lay in the time of laying, then by fibre reinforcement lay to the die of mould, after matched moulds, pass through resin moulded transfer molding, this forming method is owing to not locating in lay metal metal plate part, location between fibre reinforcement and metal metal plate part is forbidden, in forming process, easily form edge effect, cause easily layering between metal metal plate part and heat shield after moulding, forming part uneven thickness.
Summary of the invention
The invention provides a kind of resin moulded crimping and transfer processes forming method and mould of cable radome fairing, can directly metal metal plate part and heat shield be carried out to global formation, and make to connect between them reliable, accurate positioning, cable radome fairing even thickness, and the problem such as poor glue, bubble, dry spot while having solved moulding, improve production efficiency.
Technical scheme of the present invention is as follows:
The resin moulded crimping and transfer processes mould of cable radome fairing, comprise lower platen 1, punch 2, die 3, top board 4, sealing ring 5, injecting glue joint 6, primary nut 7, screw rod 8, big nut 9, go out cemented joint 10, the profile of the die cavity of die 3 and punch 2 and cable radome fairing matches, can be directly by metal metal plate part and heat shield straight forming one.
In the lower end of die 3 connection glue injection joints 6, on the upper and lower pressing plate 1 of top board 4, position, the hole place of corresponding metal metal plate part is provided with spew groove 13, has gum-injecting port 11 and gum outlet 12 on top board.On punch 2 and die 3, be provided with the connecting hole position that big nut 9, screw rod 8, primary nut 7 are installed, corresponding with metal metal plate part.
Along limit part, die bottom along being respectively equipped with rectangular seal groove on limit part, lower platen and punch contact-making surface, after matched moulds, can play sealing function in punch bottom.
When use, first metal metal plate part is embedded in punch, by fibre reinforcement lay to 3 li of the dies of mould, connecting hole position by big nut 9, primary nut 7 and screw rod 8 through die 3 and punch 2, again the punch being combined 2, die 3 are placed on lower platen 1, by injecting glue joint 6 with go out cemented joint 10 and be arranged on the position, hole that top board is corresponding, finally clamp matched moulds.
The resin moulded crimping and transfer processes forming method of cable radome fairing comprises that die treatment, metal metal plate part are pre-buried, fibre reinforcement lay, mould assembling connecting line, airtight inspection, resin heating, mold heated, resin vasopressing injection, the several steps of cure and demold, and concrete steps are
1. die treatment: will have sand papering for place, polishing, the coating release agent of cut on mould, object is to be beneficial to the demoulding, ensures molded article smooth surface.
2. metal metal plate part is pre-buried: the paving of metal metal plate part, on punch, and is added to glue and fixes.Avoid producing runner between metal metal plate part and mould, cause the appearance of the problems such as poor glue, bubble, dry spot, effectively prevented the generation of channelling effect.
3. fibre reinforcement lay: smooth fibre reinforcement lay, in die, will be ensured as far as possible and die cavity laminating in the time of lay, ensure smooth, wrinkle resistant, play not.Fibre reinforcement dimension control is in 0.1mm.Then at fibre reinforcement and cavity gap place filler, avoid channelling effect.
4. mould assembling, connecting line: prepare three circular seal rings, and be bonded in the corresponding seal groove of die, lower platen, punch.The installing hole that big nut, screw rod, primary nut is passed to metal metal plate part and fibre reinforcement, finally clamps matched moulds, ensures that play does not occur in the position of fibre reinforcement, has solved the inaccurate problem of locating.
5. airtight inspection: after glue-feeder is blocked, open gum outlet valve and utilize vavuum pump to bleed, the final vacuum degree that stops bleeding remains unchanged.If vacuum can not keep, need to find out air leak position and seal.After glue-feeder is decontroled, gum outlet is bled, and vacuum should reduce.Ensure the sealing of mould, in order to avoid gas enters die cavity in injection process.
6. resin heating: pour resin into charging basket according to the consumption of goods, utilize RTM injector or Muffle furnace heating resin, be heated to 70 DEG C~90 DEG C, about about half an hour.The flowing velocity in die cavity and the flow direction that have ensured resin, increased resin permeability.
7. mold heated: mould is sent into baking oven in the normal situation of vacuum monitor and be heated to 80 DEG C~100 DEG C insulations, mold temperature and resin temperature are consistent, ensures that resin enters the permeability that can not be subject to the impact of mold temperature after die cavity and reduce resin.
8. resin vasopressing injection: first start air compressor machine, open and add valve, injection initial pressure is 0.05MPa~0.3MPa, and after half an hour, intensified pressure is 0.3MPa~0.5MPa gradually.
9. curing and demolding: mould pushes back baking oven heating, and mold cools down, to room temperature, is laid down clamping device, takes out finished product.
The present invention has the advantages such as production cost is low, production efficiency is high, manufacturability is reliable, changes traditional process, and stabilized product quality, meets product high strength, low-density, endurance, and fail-safety is good, and structure can one-time formed requirement.
Brief description of the drawings
Fig. 1 radome fairing schematic cross-section
Fig. 2 is die side view
Fig. 3 die assembly generalized section
Detailed description of the invention
Below by example, the present invention is described further, but it should be noted that, publicize and implement routine object and be to help further to understand the present invention, but it will be appreciated by those skilled in the art that: without departing from the spirit and scope of the invention and the appended claims, various substitutions and modifications are all possible.Therefore, the present invention should not be limited to the disclosed content of embodiment, and the scope that the scope of protection of present invention defines with claims is as the criterion.
Example:
As shown in Figure 3, mould embodiment comprises lower platen 1, punch 2, die 3, top board 4, sealing ring 5, injecting glue joint 6, primary nut 7, screw rod 8, big nut 9, goes out cemented joint 10.
In the lower end of die 3 connection glue injection joints 6, on the upper and lower pressing plate 1 of top board 4, position, the hole place of corresponding metal metal plate part is provided with spew groove 13, along limit part, die 3 bottoms along being respectively equipped with rectangular seal groove on limit part, lower platen 1 and punch 2 contact-making surfaces, after matched moulds, can play sealing function in punch 2 bottoms.On top board 4, have gum-injecting port 11 and gum outlet 12, gum-injecting port 11 and gum outlet 12 can be used for vacuumizing equally.On punch 2 and die 3, be provided with the connecting hole position that big nut 9, screw rod 8, primary nut 7 are installed, corresponding with metal metal plate part.
When use, first metal metal plate part is embedded in to 2 li of punch, by fibre reinforcement lay to 3 li of the dies of mould, connecting hole position by big nut 9, primary nut 7 and screw rod 8 through die 3 and punch 2, again the punch being combined 2, die 3 are placed on lower platen 1, by injecting glue joint 6 with go out on the position, hole that cemented joint 10 is arranged on top board 4 correspondences, finally clamp matched moulds.
The resin moulded crimping and transfer processes moulding concrete steps of cable radome fairing are:
1. sand papering for place, polishing, the coating release agent NC55 of cut will be had on mould.Object is to be beneficial to the demoulding, ensures molded article smooth surface.
By the paving of metal metal plate part on punch 2, and fix with sulphurated siliastic.Avoid producing runner between metal metal plate part and mould, cause the appearance of the problems such as poor glue, bubble, dry spot, effectively prevented channelling effect.
By smooth fibre reinforcement lay in die 3, in the time of lay, to ensure as far as possible and die cavity laminating, ensure smooth, wrinkle resistant, play not.Fibre reinforcement dimension control is at 0.08mm.Then fill out sulphurated siliastic at fibre reinforcement and cavity gap place.
4. prepare three circular seal rings 5, and be bonded in the corresponding seal groove of die 3, lower platen 1, punch 2.The installing hole that big nut 9, screw rod 8, primary nut 7 is passed to metal metal plate part and fibre reinforcement, finally clamps matched moulds, ensures that play does not occur in the position of fibre reinforcement, has solved the inaccurate problem of locating.
5. after the injecting glue joint of connection glue injection mouth 11 6 use vacuum cements being blocked, open gum outlet valve and utilize vavuum pump to bleed, the final vacuum degree that stops bleeding remains unchanged.If vacuum can not keep, need to find out air leak position and seal.After injecting glue nipple orifice is decontroled, utilize the cemented joint 10 that goes out that connects gum outlet to bleed, vacuum should reduce.Ensure the sealing of mould, in order to avoid gas enters die cavity in injection process.
6. pour resin into charging basket according to the consumption of goods, utilize RTM injector or Muffle furnace heating resin, be heated to 80 DEG C, the heat time is about half an hour.The flowing velocity in die cavity and the flow direction that have ensured resin, increased resin permeability.
7. mould is sent into baking oven in the normal situation of vacuum monitor and be heated to 80 DEG C of insulations, mold temperature and resin temperature are consistent, and ensure that resin enters the permeability that can not be subject to the impact of mold temperature after die cavity and reduce resin.
8. first injection time starts air compressor machine, open and add valve, the lower 0.1MPa of injection initial pressure, after half an hour gradually intensified pressure to 0.3MPa.
9. mould pushes back baking oven heating, and mold cools down, to room temperature, is laid down clamping device, takes out finished product.

Claims (5)

1. a resin moulded crimping and transfer processes forming method for cable radome fairing, comprises the following steps;
First step die treatment: will have sand papering for place, polishing, the coating release agent of cut on mould;
Second step metal metal plate part is pre-buried: the paving of metal metal plate part, on punch, and is added to glue and fixes;
The 3rd step fibre reinforcement lay: in die, fibre reinforcement dimension control is in 0.1mm, then at fibre reinforcement and cavity gap place filler by smooth fibre reinforcement lay;
The 4th step mould assembling, connecting line: by three articles of circular seal rings, be bonded in the corresponding seal groove of die, lower platen, punch, on punch and die, be provided with the connecting hole position that big nut, screw rod, primary nut are installed, the installing hole that big nut, screw rod, primary nut is passed to metal metal plate part and fibre reinforcement, finally clamps matched moulds;
Whether the airtight inspection of the 5th step: whether after glue-feeder is blocked, open gum outlet valve and utilize vavuum pump to bleed, observe vacuum and remain unchanged after stopping bleeding, then glue-feeder is decontroled, gum outlet is bled, observe vacuum and reduce;
The 6th step resin heating: pour resin into charging basket, utilize RTM injector or Muffle furnace heating resin, be heated to 70 DEG C~90 DEG C, heat 15-45 minutes;
The 7th step mold heated: mould good airproof is sent into baking oven and be heated to 80 DEG C~100 DEG C insulations;
The 8th step resin vasopressing injection: first start air compressor machine, open and add valve, injection initial pressure is 0.05MPa~0.3MPa, and after half an hour, intensified pressure is 0.3MPa~0.5MPa gradually;
The 9th step curing and demolding: mould is pushed back to baking oven heating, and mold cools down, to room temperature, is laid down clamping device, takes out finished product.
2. the resin moulded crimping and transfer processes forming method of cable radome fairing as claimed in claim 1, is characterized in that, the pre-fixing of mould and metal metal plate part in second step adopts sulphurated siliastic bonded metal metal plate part to mould.
3. the resin moulded crimping and transfer processes forming method of cable radome fairing as claimed in claim 1, is characterized in that, the glue that the 3rd step gap is used is sulphurated siliastic.
4. the resin moulded crimping and transfer processes forming method of cable radome fairing as claimed in claim 3, is characterized in that, the 6th step heating-up temperature is 80 DEG C, and the heat time is 30 minutes.
5. the resin moulded crimping and transfer processes forming method of cable radome fairing as claimed in claim 4, is characterized in that, in the 7th step, mold heated is incubated to 80 degree.
CN201110247501.6A 2011-08-26 2011-08-26 Molding method and mold used in resin transfer molding technology of cable rectifying cover Active CN102285059B (en)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102529040A (en) * 2012-02-27 2012-07-04 重庆海电风能科技有限公司 Vacuum sealing mold of wind turbine nacelle cover
CN102922671B (en) * 2012-11-13 2015-04-29 中国科学院宁波材料技术与工程研究所 Resin transfer moulding mold and resin transfer moulding molding system
CN103904530A (en) * 2014-03-06 2014-07-02 佛山市高明毅力温控器有限公司 Manufacturing process for sealing structure of electric junction box
CN110524756A (en) * 2019-08-07 2019-12-03 中国商用飞机有限责任公司北京民用飞机技术研究中心 Treadmill test part molding die, treadmill test part production method and treadmill test part

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2374328Y (en) * 1999-07-07 2000-04-19 北京航空工艺研究所 Mould for transfer moulding shaping tech. for composite resin
CN101111132A (en) * 2006-07-21 2008-01-23 王水木 Casing manufacturing method
CN101269548A (en) * 2008-05-09 2008-09-24 天津工业大学 Device and method for preparing composite material with resin transfer molding technique
CN101428476A (en) * 2008-11-10 2009-05-13 东华大学 Method for manufacturing vacuum mould closing of false ogive

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2374328Y (en) * 1999-07-07 2000-04-19 北京航空工艺研究所 Mould for transfer moulding shaping tech. for composite resin
CN101111132A (en) * 2006-07-21 2008-01-23 王水木 Casing manufacturing method
CN101269548A (en) * 2008-05-09 2008-09-24 天津工业大学 Device and method for preparing composite material with resin transfer molding technique
CN101428476A (en) * 2008-11-10 2009-05-13 东华大学 Method for manufacturing vacuum mould closing of false ogive

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