CN105729823A - Method for improving compressive strength of carbon fiber/phenolic aldehyde molded product - Google Patents
Method for improving compressive strength of carbon fiber/phenolic aldehyde molded product Download PDFInfo
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- CN105729823A CN105729823A CN201410744840.9A CN201410744840A CN105729823A CN 105729823 A CN105729823 A CN 105729823A CN 201410744840 A CN201410744840 A CN 201410744840A CN 105729823 A CN105729823 A CN 105729823A
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- carbon fiber
- phenolic aldehyde
- molded product
- carbon cloth
- pressing
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Abstract
The invention discloses a method for improving the compressive strength of a carbon fiber/phenolic aldehyde molded product. Carbon cloth and the carbon fiber/phenolic aldehyde molded product are included. The carbon fiber/phenolic aldehyde molded product is manufactured and produced through a traditional mold pressing manufacturing process. The carbon cloth is flatly laid in a premix of the carbon fiber/phenolic aldehyde molded product. The number of layers of the carbon cloth can be determined solely according to the use demands and the manufacturing process. The carbon fiber/phenolic aldehyde molded product with the carbon cloth is allowed to be subjected to later machining. According to the method for improving the compressive strength of the carbon fiber/phenolic aldehyde molded product, the compressive strength of the product is improved by adding the carbon cloth under the condition that the original high-temperature resistance, anti-scouring and anti-carbonization performance of the carbon fiber/phenolic aldehyde molded product is not influenced; and due to the existence of the carbon cloth, peeled objects produced when the compression resistance function of the product fails cannot fall off the product body, and the possibility of exhaust nozzle blockage is avoided.
Description
Technical field
The present invention relates to solid propellant rocket field, the method being specifically related to a kind of enhanced carbon fiber/phenolic aldehyde pressing comprcssive strength.
Background technology
Solid propellant rocket is the power section of guided missile, is the propulsion plant that the chemical energy of the SOLID PROPELLANT COMBUSTION being seated in combustion chamber shell body generation converts to kinetic energy via jet pipe.In the process of energy conversion, propellant is to be produced the form of high-temperature high-pressure fuel gas to provide chemical energy by burning, therefore the inner chamber of whole solid propellant rocket is filled with high-temperature high-pressure fuel gas.
Carbon fiber/phenolic aldehyde pressing is the nonmetallic materials of a kind of anti-carbonization of high temperature resistance antiscour, is often used in as the component materials directly contacting high-temperature high-pressure fuel gas.But carbon fiber/phenolic aldehyde pressing is formed through pressuring method compacting by chopped carbon fiber tow and resin, and the physical property of this material belongs to anisotropy, comparatively unstable, and resistance to compression is comparatively weak with tensile strength.When the combustion gas effect being subject to high-voltage high-speed, carbon fiber/phenolic aldehyde pressing easily cracks, and when penetration of cracks during whole goods, can produce the overburden of bulk, it is easy to blocking jet pipe, and solid propellant rocket can be made time serious to produce the catastrophic collapses such as blast.
Summary of the invention
Present invention aims to above-mentioned Problems existing, it is provided that the method for a kind of enhanced carbon fiber/phenolic aldehyde pressing comprcssive strength, under considering High Temperature High Pressure combustion gas effect at a high speed, it is ensured that the reliability of carbon fiber/phenolic aldehyde pressing and structural intergrity.
In order to solve the above-mentioned technical problem of the present invention, solution provided by the invention is to provide the method for a kind of enhanced carbon fiber/phenolic aldehyde pressing comprcssive strength, and its step includes: by the processing technology of carbon fiber/phenolic aldehyde pressing, the premix material such as chopped carbon fiber tow, resin is carried out pressurization and forms goods；Put into smooth carbon cloth in premix material intermediate layer, carbon cloth is compressed on inside carbon fiber/phenolic aldehyde pressing；According to product needed and products thickness, the carbon cloth number of plies of optional compacting.
Further, the thickness of described carbon fiber/phenolic aldehyde pressing is 7.5mm, for dome shape structure, has uniformly suppressed 5 layers of carbon cloth.Pressing has carried out polish process after having suppressed carbon cloth, so the carbon cloth within final products is not what extend completely through.
Due to the fact that have employed increases carbon cloth layer and improves the comprcssive strength of carbon fiber/phenolic aldehyde pressing, compared with prior art, and its advantage and providing the benefit that:
(1) do not affecting on the original high temperature resistance antiscour anti-carbonation properties of carbon fiber/phenolic aldehyde pressing, improve the comprcssive strength of goods by increasing carbon cloth；
(2) due to the existence of the internal carbon cloth of goods, through-wall crack the bulk overburden produced will not come off from goods body, it is to avoid the possibility of blocking jet pipe.
Accompanying drawing explanation
By reading the detailed description that non-limiting example is made made with reference to the following drawings, the other features, objects and advantages of the present invention will become more apparent upon.
Fig. 1 is the product structure schematic diagram adopting enhanced carbon fiber/phenolic aldehyde pressing comprcssive strength.
Detailed description of the invention
Referring to the accompanying drawing illustrating the embodiment of the present invention, the present invention is described in more detail.But, the present invention can realize in many different forms, and should not be construed as by restriction of the embodiment of proposition at this.On the contrary, it is proposed to these embodiments are to reach fully and complete disclosure, and make those skilled in the art understand the scope of the present invention completely.In these accompanying drawings, for clarity sake, it is possible to be exaggerated size and the relative size in layer and region.
As shown in Figure 1, the method of enhanced carbon fiber/phenolic aldehyde pressing comprcssive strength contains carbon cloth 1, carbon fiber/phenolic aldehyde pressing 2, the product that the mold pressing manufacturing process that described carbon fiber/phenolic aldehyde pressing 2 is traditional is processed into, carbon cloth 1 is entirely to be layered on inside as required when premix material proportioning, and the number of plies of carbon cloth 1 is determined as required voluntarily.When determining the number of plies of carbon cloth 1, except considering the instructions for use of goods, also needing to take into account the demand of molding manufacturing process, the quantity of the premix material such as chopped carbon fiber tow between carbon cloth layer and carbon cloth layer, resin to reach the minimum requirements amount of pressing.
Described carbon fiber/phenolic aldehyde pressing 2 containing carbon cloth, machines the blank of product by embossing manufacturing process, and polish postmenstruation processes and finally gives product shown in Fig. 1, and internal contained carbon cloth layer is not the product extended completely through.
Further, the product shown in Fig. 1 is carbon fiber/phenolic aldehyde pressing 2, wall be shaped as sphere, wall thickness is 7.5mm.According to product user demand, during green state, the inner homogeneous of goods has suppressed 5 layers of carbon cloth 1, and the carbon cloth 1 after polish processes not is what extend completely through.
Product containing carbon cloth 1 and previous status (without carbon cloth) product are carried out pressure-bearing contrast test, after comparing maximum pressure-bearing pressure and analyzing pressure-bearing inefficacy after the damage mode of injury region, it is thinned the wall thickness (previous status wall thickness is 10mm) of product, reduces the quality of product.Compared to previous status (without carbon cloth) product, add the product of carbon cloth when pressure-bearing lost efficacy, due to the existence (carbon cloth layer can't rupture) of carbon cloth 1 layer, the spall of bulk can't be produced.
This structure is applied in this model, and Product Process and productibility are verified, and have passed through the slow test under outer load effect, and repeatedly ground and flight test, and structure is reliable, meets the instructions for use of solid propellant rocket.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when without departing substantially from the spirit of the present invention or basic feature, it is possible to realize the present invention in other specific forms.
Claims (3)
1. the method for enhanced carbon fiber/phenolic aldehyde pressing comprcssive strength, it is characterised in that comprise the steps: that the premix material such as chopped carbon fiber tow, resin are carried out pressurization and form goods by the processing technology by carbon fiber/phenolic aldehyde pressing；Put into smooth carbon cloth in premix material intermediate layer, carbon cloth is compressed on inside carbon fiber/phenolic aldehyde pressing；According to product needed and products thickness, the carbon cloth number of plies of optional compacting.
2. the method for enhanced carbon fiber according to claim 1/phenolic aldehyde pressing comprcssive strength, it is characterised in that the described carbon cloth number of plies is 3～9 layers.
3. the method for enhanced carbon fiber according to claim 1 and 2/phenolic aldehyde pressing comprcssive strength, it is characterised in that the thickness of described carbon fiber/phenolic aldehyde pressing is 7.5mm, for dome shape structure, has uniformly suppressed 5 layers of carbon cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744840.9A CN105729823A (en) | 2014-12-09 | 2014-12-09 | Method for improving compressive strength of carbon fiber/phenolic aldehyde molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410744840.9A CN105729823A (en) | 2014-12-09 | 2014-12-09 | Method for improving compressive strength of carbon fiber/phenolic aldehyde molded product |
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| CN105729823A true CN105729823A (en) | 2016-07-06 |
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| CN201410744840.9A Pending CN105729823A (en) | 2014-12-09 | 2014-12-09 | Method for improving compressive strength of carbon fiber/phenolic aldehyde molded product |
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Cited By (2)
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| CN107030455A (en) * | 2017-06-21 | 2017-08-11 | 西安蜂鸟精密机械有限公司 | The processing method of part filled with phenolic glass fiber moulding compound series material |
| CN110132058A (en) * | 2019-05-14 | 2019-08-16 | 湖北三江航天江北机械工程有限公司 | Combustion gas stream row leads device and row's guiding method |
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Application publication date: 20160706 |