IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0782612
(2001-02-13)
|
우선권정보 |
DE-0013409 (2000-03-17); DE-0002569 (2001-02-08); EP-0102981 (2001-02-08) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Deutsches Zentrum fuer Luft-und Raumfahrt e.V.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
17 인용 특허 :
17 |
초록
▼
In order to provide a process for the production of a component consisting of a fiber reinforced material, with which liquid resin is supplied to a semifinished fiber article by way of application by vacuum pressure, it is provided for a heat curing resin to be used as resin and for application by v
In order to provide a process for the production of a component consisting of a fiber reinforced material, with which liquid resin is supplied to a semifinished fiber article by way of application by vacuum pressure, it is provided for a heat curing resin to be used as resin and for application by vacuum pressure and temperature to be controlled such that in relation to the liquid resin the boiling point curve of the resin is not exceeded.
대표청구항
▼
1. A process for the production of a component consisting of a fiber reinforced material, wherein:a liquid heat curing resin is applied to a semi-finished fiber article via vacuum pressure,the vacuum pressure is controlled together with temperature such that during application of the liquid resin, i
1. A process for the production of a component consisting of a fiber reinforced material, wherein:a liquid heat curing resin is applied to a semi-finished fiber article via vacuum pressure,the vacuum pressure is controlled together with temperature such that during application of the liquid resin, including during resin infiltration and curing, the boiling point curve of the resin is not exceeded, anda distribution fabric serving as a flow aid for the supply of the resin to the semi-finished fiber article becomes inoperative at a certain distance in relation to a workpiece edge. 2. A process as defined in claim 1, wherein the application by vacuum pressure is controlled via a vacuum pump during the resin infiltration. 3. A process as defined in claim 1, wherein vacuum pressure is applied to a distribution fabric serving to supply the resin to the semi-finished fiber article. 4. A process as defined in claim 1, wherein the pressure following the resin infiltration is measured at a distribution fabric serving to supply the resin to the semi-finished fiber article. 5. A process as defined in claim 4, wherein at least one pressure sensor is brought into operative contact with the distribution fabric following the resin infiltration of the article. 6. A process as defined in claim 5, wherein the operative contact is interrupted prior to and during the resin infiltration of the article. 7. A process as defined in claim 1, wherein the semi-finished fiber article is placed in a mold during the resin infiltration. 8. A process as defined in claim 7, wherein the temperature of the mold is controlled. 9. A process as defined in claim 1, wherein a plurality of temperature sensors are arranged at a vacuum foil. 10. A process as defined in claim 1, wherein the temperature is adjusted with respect to a temperature dependence of the viscosity of the resin. 11. A process as defined in claim 10, wherein the resin infiltration takes place in an injection phase at a certain temperature or in a certain range of temperatures, the resin thereby having such a viscosity that an essentially uniform resin front is formable. 12. A process as defined in claim 10, wherein the temperature is adjusted such that the viscosity of the resin is in a range of about 10 mPas to 1000 mPas. 13. A process as defined in claim 1, wherein a reduction in the application by vacuum pressure is brought about in a curing phase following an injection phase. 14. A process as defined in claim 13, wherein an increase in temperature is brought about in the curing phase following the injection phase. 15. A process as defined in claim 1, wherein the temperature is increased in a curing phase, the resin being completely cured during said phase. 16. A process as defined in claim 15, wherein the temperature is increased in relation to an injection phase. 17. A process as defined in claim 15, wherein the temperature is increased in relation to a curing phase following an injection phase. 18. A process as defined in claim 1, wherein the temperature is adjusted such that a certain processing period or a certain processing period range is specified for the resin. 19. A process as defined in claim 18, wherein the temperature is adjusted such that the processing period of the resin is adapted to a workpiece size. 20. A process as defined in claim 1, wherein a process monitoring is carried out with respect to the resin infiltration and the resin curing. 21. A process as defined in claim 1, wherein the resin is pre-aged prior to the infiltration to increase the viscosity. 22. A process as defined in claim 1, wherein:a resin trap is provided for making a uniform application by vacuum pressure possible after the resin infiltration, andany removal of the resin by suction during a curing phase of the resin is essentially prevented. 23. A process as defined in claim 22, wherein the resin trap comprises an extraction guide means having such a large internal diameter that air and gas bubbles are abl e to rise without resin being pressed into an extraction chamber. 24. A process as defined in claim 22, wherein the extraction guide means is formed in a resin storage vessel for the resin injection. 25. A process as defined in claim 1, wherein the distance is in a range from about 10 mm to 50 mm. 26. A process as defined in claim 1, wherein the distribution fabric ends prior to said distance. 27. A process as defined in claim 1, wherein a cover film is provided between a workpiece and a distribution film for limiting the effectiveness of the distribution fabric. 28. A process for the production of a component consisting of a fiber reinforced material, wherein:a liquid heat curing resin is applied to a semi-finished fiber article via vacuum pressure,the vacuum pressure is controlled together with temperature such that during application of the liquid resin, including during resin infiltration and curing, the boiling point curve of the resin is not exceeded; anda distribution fabric serving as a flow aid during the supply of resin is cut in relation to a workpiece edge forming a gap in the distribution fabric in order to control an angular course of a flow front of the resin. 29. A process as defined in claim 28, wherein an end of said workpiece edge is sealed. 30. A process as defined in claim 1, wherein at least one vacuum port is provided, vacuum pressure being applied to a workpiece via said port or ports and said port or ports being connected to at least one vacuum pump. 31. A process as defined in claim 30, wherein one vacuum port is arranged in an area last reached by a flow front of injected resin. 32. A process as defined in claim 30, wherein one vacuum port is designed as a resin trap able to accommodate an amount of resin necessary to prevent the resin from passing into a vacuum system. 33. A process for the production of a component consisting of a fiber reinforced material, wherein:a liquid heat curing resin is applied to a semi-finished fiber article via vacuum pressure,the vacuum pressure is controlled together with temperature such that during application of the liquid resin, including during resin infiltration and curing, the boiling point curve of the resin is not exceeded;at least one vacuum port is provided, vacuum pressure being applied to a workpiece via said port or ports and said port or ports being connected to at least one vacuum pump;one vacuum port is arranged in an area last reached by a flow front of injected resin; andsaid vacuum port is positioned over a distribution fabric and connected via the distribution fabric to an underside of the semi-finished fiber article. 34. A process as defined in claim 30, wherein a connection of the vacuum port to a vacuum foil is sealed. 35. A process as defined in claim 33, wherein the distribution fabric is sealed in relation to a workpiece edge. 36. A process as defined in claim 35, wherein the distribution fabric is sealed by a seal, and a film is arranged between the distribution fabric and the seal. 37. A process as defined in claim 30, wherein the vacuum port is sealed in relation to the workpiece. 38. A process as defined in claim 1, wherein a resin brake is arranged at a workpiece edge. 39. A process as defined in claim 38, wherein a first connection for the application by vacuum pressure is arranged in front of the resin brake in relation to the semi-finished fiber article and a second connection is arranged behind the resin brake. 40. A process as defined in claim 1, wherein a process monitoring is carried out by means of ultrasound acting on the workpiece. 41. A process as defined in claim 1, wherein a polyaddition resin is used as said heat curing resin. 42. A process as defined in claim 1, wherein the flow rate of the resin from a resin store to the semi-finished fiber article is controllable.
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