CN1883912A - Method for producing sealing rubber air-bag male die and resin transfer molding method therefor - Google Patents
Method for producing sealing rubber air-bag male die and resin transfer molding method therefor Download PDFInfo
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- CN1883912A CN1883912A CN 200610014057 CN200610014057A CN1883912A CN 1883912 A CN1883912 A CN 1883912A CN 200610014057 CN200610014057 CN 200610014057 CN 200610014057 A CN200610014057 A CN 200610014057A CN 1883912 A CN1883912 A CN 1883912A
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Abstract
Disclosed are a preparation method for sealed rubber air bag positive mold and a novel method for resin delivery mold formation, and the former comprises manufacturing a negative mold using metal material, putting filling material having a thickness equal or more than composite material product into the negative mold, spreading two or more than two pieces of rubber sheets overlapping each other for 20-30mm, one of the rubber sheets having a air faucet, sealing and fixing the negative mold; filling compressed air into the air faucet projecting out of the negative mold, sticking the rubber sheets behind the filling material, putting them into the bake oven to heat them up at a temperature of 150-160 DEG.C and holding a air pressure at 0.2-0.3Mpa for 10-20min, to make the sheet overlapping binding and sealed; cooling down, detaching the negative mold, and taking seal rubber air bag positive mold out. The latter method comprises further using the positive mold and metal mold manufactured by the former method, embedding a composite material precast product, filling compressed air into the positive mold, injecting resin, curing, degassing and demoulding, and obtaining the composite material.
Description
Technical field
The present invention relates to a kind of composite resin forming technique, particularly a kind of manufacture method of caulking gum air bag formpiston and be used for the new method of the resin transfer molding of labyrinth composite product, international monopoly Main classification number intend being Int.Cl.B29C70/00.
Background technology
Resin transfer moulding technology (RTM) is a kind of forming technique of composite.The composite product of producing with this technology has and can locally strengthen, and the two sides is smooth, and size is accurate, and therefore characteristics such as environmental friendliness are used for fields such as Aero-Space, communications and transportation, electrical equipment more and more widely.Traditional RTM technology, because what use is the metal die material, when making the composite product of labyrinth, a lot of structures as spherical or big hemispherical, modification chamber that opening is little, contain complicated product moulding such as built-in fitting after, formpiston integral body can't be separated, therefore the formpiston piecemeal can only be manufactured and designed, use splicing assembling back.But new technical problems such as location and sealing will inevitably appear assembling in the forming technique of this piecemeal formpiston, and not only design makes troubles to mould, and makes RTM moulding process difficulty, even is difficult to moulding, has also increased cost simultaneously.On the other hand, for large-sized member, the metal die area is big, and weight is big, and processing cost is higher, and not only assembling has brought difficulty to mould, and also is easy to generate distortion in the resin injection process, has reduced the formed product quality.
Summary of the invention
At the deficiencies in the prior art, the technical problem that quasi-solution of the present invention is determined is, design a kind of manufacture method of caulking gum air bag formpiston and the new method of resin transfer molding, it is simple that the manufacture method of sealing rubber pneumatic bag formpiston has the mould manufacturing, with low cost, be specially adapted to do the formpiston of various labyrinths and/or large-sized composite material product; The new method of this resin transfer molding by the manufacture method of described caulking gum air bag formpiston, make the labyrinth composite product solidify the back demoulding easily, and it is simple to have technology, non-caked with composite product, advantages such as good quality of product.
The technical scheme that the present invention solves the manufacture method technical problem of described caulking gum air bag formpiston is: the manufacture method that designs a kind of caulking gum air bag formpiston, this manufacture method at first utilizes metal material to make former according to the shape and structure of composite prefabricated component, in described former, pack into then and be not less than the packing material of composite product thickness, spread the rubber sheet that overlaps the 20-30 millimeter more than 2 or 2 mutually, wherein on a rubber sheet valve is installed, sealing assembly former, and described valve is stretched out outside the described sealing assembly former; Within described sealing former, squeeze into compressed air by described valve, described rubber sheet is pasted obey behind the surface of described packing material; Put into baking oven again and heat, make temperature reach 150-160 ℃, keep compressed air pressure 10-20 minute of 0.2-0.3Mpa, make described rubber sheet sulfuration, rubber sheet lap-joint adhesive seal; After the cooling, take described sealing assembly former apart, can take out made caulking gum air bag formpiston.
The technical scheme that the present invention solves the new method technical problem of described resin transfer molding is: design a kind of new method of resin transfer molding, this new method utilizes metal material to be former.The caulking gum air bag of the gas nozzle of the manufacture method manufacturing of caulking gum air bag formpiston of the present invention is a formpiston, the good mould of fixing seal behind the composite prefabricated component of packing between the yin, yang mould; Import compressed air by described valve in the rubber pneumatic bag formpiston, the air pressure in the control rubber pneumatic bag formpiston is 0.1-0.7Mpa; Inject resin then, the injection pressure of resin is less than the compressed air pressure in the described rubber pneumatic bag formpiston, treat resin solidification after, utilize described valve to discharge air in the caulking gum air bag formpiston, the demoulding promptly makes composite.
Compared with prior art, the rubber pneumatic bag that the present invention relates to have designed uniquely the sealing of gas nozzle is a formpiston, utilize the deformability of rubber mold, the labyrinth feature that fully adapts to composite product, make it to bear in the air and press, can bear resin dipping external pressure again, satisfy the RTM process conditions; Behind the resin solidification, the rubber pneumatic bag formpiston separates with the demoulding of labyrinth composite product easily by the venting contraction distortion, greatly reduce manufacturing cost, guaranteed product quality, and technology is simple, has solved labyrinth composite product mould and has made difficulty, cost height, be difficult to problems such as stripping forming and large-sized composite material product metal die cost costliness, have the favorable industrial practicality.
Description of drawings
Fig. 1 is the process route view of the new method of resin transfer molding of the present invention;
Fig. 2 is the schematic diagram of a kind of embodiment of employing resin transfer molding new method of the present invention:
Fig. 3 is the schematic diagram of the another kind of embodiment of employing resin transfer molding new method of the present invention;
Fig. 4 is the process route view of the manufacture method of caulking gum air bag formpiston of the present invention.
The specific embodiment
Further narrate the present invention below in conjunction with embodiment and accompanying drawing thereof:
The manufacture method (referring to Fig. 1-4) of a kind of caulking gum air bag formpiston (abbreviation formpiston) of the present invention's design, this manufacture method at first utilize metal material to make former 1 according to the shape and structure of composite prefabricated component 2.In described former 1, pack into be not less than the packing material of composite prefabricated component 2 thickness after, spreading more than 2 or 2 the rubber sheet of overlap joint 20-30 millimeter mutually on the packing material, wherein on a rubber sheet valve 4 is installed.Then, sealing assembly former, and described valve 4 is stretched out outside the described sealing assembly former by the air nozzle hole of reserving, air nozzle hole is salable.Within described sealing former, apply compressed air by described valve 4, described rubber sheet is pasted obeys behind the surface of described packing material, putting into baking oven again heats, make temperature reach 150-160 ℃, keep compressed air pressure 5-20 minute of 0.2-0.3Mpa, make described rubber sheet sulfuration, rubber sheet lap-joint adhesive seal; After the cooling, take described sealing assembly former apart, can take out made caulking gum air bag formpiston 3.The manufacturing assembling of described former 1 is prior art.
The piece number and the shape of the rubber sheet of manufacturing caulking gum air bag formpiston 3 of the present invention are not limit, according to the planform of the planform of composite product 2 or metal former or make the needs of formpiston 3 and decide.For the composite product 2 of shape and structure complexity, the rubber sheet piece number that making formpiston 3 needs is more, may be greater than 2.No matter required rubber sheet how much, all will overlap the 20-30 millimeter between the every rubber sheet, should pay special attention to when cutting out.The lap of splice of rubber sheet with can be bonding firm be principle.The rubber sheet of described manufacturing formpiston 3 can be selected according to the temperature of resin solidification and the complexity of product structure, during the high resin of general composite material by adopting solidification temperature, formpiston 3 should be selected the high-temperature resistant rubber material, and at the high product of complex structure degree, formpiston 3 should be selected the high elastomeric material of percentage elongation.General silicon rubber commonly used, nitrile rubber etc. are as the rubber sheet of making formpiston 3.
The new method (hereinafter to be referred as the RTM new method) of the resin transfer molding of the present invention's design, be on original RTM method basis, utilize metal material to be former, the caulking gum air bag of the gas nozzle of the manufacture method manufacturing of caulking gum air bag formpiston of the present invention is a formpiston, the good mould of fixing seal behind the composite prefabricated component of packing between the yin, yang mould; Import compressed air by described valve in the rubber pneumatic bag formpiston, the air pressure in the control rubber pneumatic bag is 0.1-0.7Mpa, makes it have the ability that supports the composite prefabricated component, and can bear the external pressure that is produced when resin floods; Inject resin then, the injection pressure of resin is less than the compressed air pressure in the described rubber pneumatic bag, treat resin solidification after, utilize described valve to discharge air in the caulking gum air bag formpiston, the demoulding promptly makes composite.
The present invention has designed the caulking gum air bag formpiston that flexible material is made uniquely, and manufacture method is easy, and adaptability is good, and is with low cost, adapts to the shape and structure requirement of labyrinth composite product especially, economizes on resources, and increases the benefit.RTM new method of the present invention is on the basis of traditional RTM method, adopted the caulking gum air bag formpiston of the gas nozzle that caulking gum air bag formpiston manufacture method of the present invention makes uniquely, utilize it to inflate the shape and structure requirement that adapts to the labyrinth composite product, utilize its venting contraction distortion to solve complicated shape structure demoulding difficult problem, and moulding process is simple, is convenient to practical application.Though manufacture method of the present invention is specially adapted to the manufacturing of labyrinth composite product, equally also be applicable to the manufacturing of routine or general structural composite material product.
Caulking gum air bag formpiston manufacture method of the present invention and RTM new method are further described by following embodiment, but embodiment does not limit the manufacture method and the RTM new method of caulking gum air bag formpiston of the present invention.
The present invention does not address part and is applicable to prior art.
The caulking gum air bag formpiston manufacture method and the RTM novel molding method (referring to Fig. 2) of big hemispherical composite product.
(1) makes caulking gum air bag formpiston: at first make two symmetrical mold piece 1 and 6, three mould pieces of 1 ' and plane cover board mold piece, 1,1 ' and 6 common formers of forming with metal material greater than 1/4 sphere shape according to the composite product shape need.Make the caulking gum air bag formpiston 3 of the semi-spherical shape of gas nozzle 4 again with rubber sheet, make it to have deformability and sealing.
The manufacture method of big hemispherical formpiston 3 is: with lay packing material in described metal cavity block 1 and 1 ', the packing material of embodiment adopts glass fabric earlier, and lay thickness is not less than the gauge of composite product 2; Again a rubber sheet is laid in the surface of glass fabric, on another piece rubber sheet, installs 4, two rubber sheet overlap joints of valve 20mm, and valve 4 is passed from the cavity block 6 that installs sealing strip 8.This cavity block 6 is provided with an air nozzle hole that is complementary with described valve 4, and air nozzle hole is salable, can make mould sealing assembling after, valve 4 places outside the sealing assembly jig, so that inflate in mould.With screw 7 that two sphere cavity blocks 1 of described plane cover plate 6 and other and 1 ' fixing seal assembly are good, utilize valve 4 in mould, to charge into compressed air, putting into baking oven then heats, because the support of former is arranged, under compressed-air actuated effect, rubber sheet can paste obeys on the surface of glass fabric and moulding, when oven temperature reaches 150 ℃, keep-uped pressure 0.3Mpa10 minute, make the vulcanization of rubber, it is as a whole that two rubber sheets are promptly made, and forms the caulking gum air bag identical with the product shape and structure; After the cooling, take described plane cover plate cavity block 6 apart, venting can obtain described finished product caulking gum air bag formpiston 3.
(2) the RTM new method is made composite product: with composite prefabricated component 2 put into described sphere cavity block 1,1 ' and the formpiston 3 of gained between, sealing strip 8 is installed, with screw 7 two sphere cavity blocks of described plane cover plate cavity block 6 and other 1,1 ' sealing are installed, and the valve 4 of described formpiston 3 is stretched out outside the plane cover plate cavity block 6.In formpiston 3, charge into compressed air by described valve 4, and keep its internal pressure 0.3Mpa, utilize the inlet 5 on the plane cover plate cavity block 6 in mould, to inject resin, injection pressure is controlled at 0.2Mpa, after treating the exhaust outlet 9 outflow resins on the described former, close described inlet 5 and exhaust outlet 9.Then mould being put into baking oven heats.The temperature and time of heating is determined according to different resins.The embodiment of the invention adopts epoxy resin, and the temperature/time of its curing process is: 130 ℃/2 hours-→ 150 ℃/1 hour-→ 160 ℃/8 hours-→ 180 ℃/3 hours, stop heating then; After treating that curing is finished, be cooled to room temperature; Dismantle described plane cover plate cavity block 6, the air from valve 4 discharges in the formpiston 3 perhaps vacuumizes, make formpiston 3 contraction distortions, separate with the composite prefabricated component 2 of moulding, take described two sphere cavity blocks 1,1 ' apart, the big hemispherical composite product of gained can take out smoothly.
The band reinforcement the cone composite product caulking gum air bag formpiston manufacture method and RTM novel molding method (referring to Fig. 3).
(1) make caulking gum air bag formpiston: the manufacture method of formpiston 3 is same as embodiment 1 substantially.It is 2 that difference is in the metal former, and one is the cavity block 1 of similar trapezoid cross section; Another piece also is a plane cover plate cavity block 6; And used rubber sheet is three, and the lap of splice between the rubber sheet is 20mm; When described oven temperature is designed to 160 ℃, keep-uped pressure 0.2Mpa20 minute, make the vulcanization of rubber.In addition, packing material will be carried out reinforcement.
(2) the RTM new method is made composite product: composite prefabricated component 2 is placed among the metal cavity block 1, put into described formpiston 3 again, the ledge that makes it sunk part and composite prefabricated component 2 matches, by inflation, twice circulation of exhaust in formpiston 3, after composite prefabricated component 2 and formpiston 3 are adjacent to, sealing strip 8 is installed, with screw 7 described two cavity blocks 1 and 6 sealings is installed, and the valve 4 of described formpiston 3 is stretched out outside the described cavity block 6.Utilize valve 4 in formpiston 3, to charge into compressed air then, and keep its pressure 0.6Mpa; Utilize described inlet 5 injection ring epoxy resins in mould, pressure is controlled at 0.5Mpa, after treating that described exhaust outlet 9 flows out resin, close inlet 5 and exhaust outlet 9, then mould being put into baking oven heats, the temperature of curing process, time are identical with embodiment 1, wait to solidify and finish, after being cooled to room temperature, dismounting plane cover board mold piece 6, the air that discharges in the formpistons 3 from valve 4, perhaps vacuumize, make formpiston 3 contraction distortions, separate with the composite prefabricated component 2 of moulding, the cone composite product of band reinforcement can take out smoothly.
Claims (2)
1. the manufacture method of a caulking gum air bag formpiston, this manufacture method at first utilizes metal material to make former according to the shape and structure of composite prefabricated component, in described former, pack into then and be not less than the packing material of composite material element thickness, spread the rubber sheet that overlaps the 20-30 millimeter more than 2 or 2 mutually, wherein on a rubber sheet valve is installed, sealing assembly former, and described valve is stretched out outside the described sealing assembly former; Within described sealing former, squeeze into compressed air by described valve, described rubber sheet is pasted obey behind the surface of described packing material; Put into baking oven again and heat, make temperature reach 150--160 ℃, keep compressed air pressure 10-20 minute of 0.2-0.3Mpa, make described rubber sheet sulfuration, rubber sheet lap-joint adhesive seal; After the cooling, take described sealing assembly former apart, can take out made caulking gum air bag formpiston.
2. the new method of a resin transfer molding, this new method utilizes metal material to be former, the caulking gum air bag of the gas nozzle of the manufacture method manufacturing of the described caulking gum air bag of claim 1 formpiston is a formpiston, the good mould of fixing seal behind the composite prefabricated component of packing between the yin, yang mould; Import compressed air by described valve in the rubber pneumatic bag formpiston, the air pressure in the control rubber pneumatic bag formpiston is 0.1-0.7Mpa; Inject resin then, the injection pressure of resin is less than the compressed air pressure in the described rubber pneumatic bag formpiston, treat resin solidification after, utilize described valve to discharge air in the caulking gum air bag formpiston, the demoulding promptly makes composite.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100140572A CN100436095C (en) | 2006-06-06 | 2006-06-06 | Method for producing sealing rubber air-bag male die and resin transfer molding method therefor |
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| CNB2006100140572A CN100436095C (en) | 2006-06-06 | 2006-06-06 | Method for producing sealing rubber air-bag male die and resin transfer molding method therefor |
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| CN1883912A true CN1883912A (en) | 2006-12-27 |
| CN100436095C CN100436095C (en) | 2008-11-26 |
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| US4185056A (en) * | 1976-12-07 | 1980-01-22 | Noyes Tire Co. | Method of making a flexible elastomeric matrix and method of retreading tires therewith |
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