摘要:
A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.
摘要翻译:多个单向片材(30a,30b,30c)在不同方向上重叠,并且它们结合在一起。 单向片材中的至少一个是通过铺展丝束制成的,以获得均匀的厚度,宽度不小于5cm,重量不超过300g / m 2,赋予内聚力 以使其能够在与其他片材重叠之前被处理。 有利地,单向片由碳纤维制成,并且通过展开大的丝束获得。
摘要:
A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.
摘要翻译:多个单向片(30a,30b,30c)在不同的方向上重叠并且结合在一起。 单向片材中的至少一个是通过铺展丝束制成的,以获得均匀的厚度,宽度不小于5cm,重量不超过300g / m 2,赋予片材内聚力,使其能够 在与其他片材重叠之前被处理。 有利地,单向片由碳纤维制成,并且通过展开大的丝束获得。
摘要:
A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.
摘要翻译:多个单向片材(30a,30b,30c)在不同方向上重叠,并且它们结合在一起。 单向片材中的至少一个是通过铺展丝束制成的,以获得均匀的厚度,宽度不小于5cm,重量不超过300g / m 2,赋予内聚力 以使其能够在与其他片材重叠之前被处理。 有利地,单向片由碳纤维制成,并且通过展开大的丝束获得。
摘要:
A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.
摘要翻译:多个单向片材(30a,30b,30c)在不同方向上重叠,并且它们结合在一起。 单向片材中的至少一个是通过铺展丝束制成的,以获得均匀的厚度,宽度不小于5cm,重量不超过300g / m 2,赋予内聚力 以使其能够在与其他片材重叠之前被处理。 有利地,单向片由碳纤维制成,并且通过展开大的丝束获得。
摘要:
A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.
摘要翻译:多个单向片(30a,30b,30c)在不同的方向上重叠并且结合在一起。 单向片材中的至少一个是通过铺展丝束制成的,以获得均匀的厚度,宽度不小于5cm,重量不超过300g / m 2,赋予片材内聚力,使其能够 在与其他片材重叠之前被处理。 有利地,单向片由碳纤维制成,并且通过展开大的丝束获得。
摘要:
A woven fabric to be used in formation of a composite material includes multifilament warp and weft threads. Each of the warp threads and the weft threads have a total weight less than 80% of the weight of the fabric. The woven warp and weft threads have O twist/m and a torsion no greater than an original torsion of the threads before weaving. Each woven warp and weft thread has a width over the entire length thereof that is greater than or equal to an original width before weaving. The fabric is woven to have a given weight per unit area and a fiber volume ratio that is approximately constant throughout the fabric and that is satisfactory for use of the fabric in a composite material. The warp and weft threads of a yarn count that is greater than a yarn count traditionally used to achieve the fiber volume ratio for the given weight per unit area.
摘要:
A woven fabric to be used in formation of a composite material includes multifilament warp and weft threads. Each of the warp threads and the weft threads have a total weight less than 80% of the weight of the fabric. The woven warp and weft threads have 0 twist/m and a torsion no greater than an original torsion of the threads before weaving. Each woven warp and weft thread has a width over the entire length thereof that is greater than or equal to an original width before weaving. The fabric is woven to have a given weight per unit area and a fiber volume ratio that is approximately constant throughout the fabric and that is satisfactory for use of the fabric in a composite material. The warp and weft threads of a yarn count that is greater than a yarn count traditionally used to achieve the fiber volume ratio for the given weight per unit area.
摘要:
The invention relates to a process for the production of hollow bodies of revolution formed from threads extending in three different directions, as well as to a machine for performing this process. The machining of a mandrel, the installation or implantation of retaining or locking rings on this mandrel, the winding and weaving of the threads in circumferential, longitudinal passages formed between the locking rings and the appropriate dimensional controls and checks are carried out on the same machine. On one side of the horizontal axis of the machine is provided a mobile support on which can be mounted the subassemblies for machining the mandrel, the implantation of the locking rings, winding and control, the weaving system being placed on the other side of the axis. In order the facilitate the weaving operations, the weaving carriage moves parallel to a fictitious generatrix joining the ends of the body, the weaving means being oriented perpendicular to said generatrix.
摘要:
A multilayer textile article for the production of laminated materials has layers each consisting of a two-directional cloth, the layers being joined together by a third thread extending in a direction inclined to the direction in which the threads of the layers extend. According to the invention the third thread forms a continuous stitching (C), the stitching extending helically from one end of the layers to the other.
摘要:
The present invention relates to a process for manufacturing pieces of revolution made of three-dimensional material, of which the generatrix has at least one concave part, said process consisting in making a support mandrel provided with rows of pins defining therebetween longitudinal corridors and circumferential corridors, in disposing superposed layers of yarns in said corridors by winding and by filling, in densifying the assembly thus obtained, and, finally, in eliminating the support mandrel, wherein the longitudinal yarns are deposited in corresponding corridors and these yarns are maintained in the corridors at the level of said concave part. The invention also relates to a machine for carrying out this process.