Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Kabushiki Kaisha Toyota Chuo Kenkyusho

Hiroshi Omori

Meiji Anahara

Yoshiharu Yasui

Yoshihisa Suzuki

Kazuo Seiki

Susumu Kawabata

Hiroshi Niimi

Shigeru Takasu

Three dimensional fabric and method for producing the same

A three dimensional fabric of substantially columnar shape having an axis. A plurality of substantially cylindrical axial yarn layers are arranged concentrically about and outward from the axis. Each of the axial yarn layers includes a plurality of axial yarns extending longitudinally relative to the axis. Circumferential yarn turns are inserted to extend circumferentially around the axis at several positions including outside of the outermost axial yarn layer. Inside of the innermost axial yarn layer, and between the inner and outer axial yarn layers. A plurality of radial yarns are woven between the circumferential yarn turns to extend zigzag succesively in the longitudinal and radial directions relative to the axis. The radial yarns are woven substantially perpendicular to the circumferential yarns, between the circumferential yarns, each of the radial yarns are woven in a particular plane that extends through the axis.

Three dimensional fabric and method for making the same

A method and an apparatus for producing a fasciated yarn, utilizing an air nozzle for false-twisting a fiber bundle. The apparatus is provided with a fiber passage comprising an inlet portion, a small channel, and a large channel, and is provided also with a contact area on an inner wall of the small channel, this contact area being formed by the intersection at an angle of the small channel and the large channel. During the spinning operation, the fiber bundle is forced against the contact area, effectively suppressing a twist imparted by a vortex such that it does not ascend toward the upstream region. Also, since ballooning can be suppressed by the contact area, the size of the small channel can be increased, resulting in the intake by suction of a sufficient amount of air in the inlet portion.

Method and apparatus for producing a fasciated yarn

In a pneumatic nozzle utilized in the process of producing a fasciated yarn, provided with a transporting passage of a fiber bundle in which an inlet portion, a smaller channel, and a large channel having an outlet opening are successively arranged along the longitudinal axis of the transporting passage, and a plurality of air supply apertures for ejecting compressed air toward a restricted region of the transporting passage, a plurality of small chambers formed around the large channel is symmetry with respect to the large channel's longitudinal axis and connecting apertures for connecting the large channel to the outside of the nozzle so that air introduced into the large channel through the inlet opening and the air-supply apertures can be partly discharged, while the remaining part of the above-mentioned air is discharged from the outlet of the large chamber. In this nozzle, a supplemental ring can be used to adjust the air condition in the large chamber by mounting on a discharge end portion of the nozzle.

Pneumatic nozzle utilized in the process of producing a fasciated yarn

An apparatus for producing a fasciated yarn comprising two air nozzles (2, 3) arranged at an angle in such a manner that a wedge shaped space (S) is formed therebetween, in which each of the air nozzles (2, 3) has a function of rotating a fiber bundle about the axis thereof in a direction that is the reverse of the other. A yarn passage from the first air nozzle (2) and to the second air nozzle (3) is so adapted that the fiber bundle is not in positive contact with an inner wall of an exit portion (7) of the first air nozzle (2) but is in contact with an inner wall of an inlet portion (4) of the second air nozzle (3), whereby a twist ascent from the second air nozzle (3) into the first air nozzle (2) is adequately suppressed and effective fasciated yarn forming is attainable. According to the wedge shaped space (S), the interference by exhaust air from the first air nozzle (2) with the second air nozzle (3) is eliminated.

Apparatus for producing a fasciated yarn

A false-twist nozzle with an improved structure is provided herein. The false-twist nozzle according to the invention comprises a housing having a large-diameter yarn passage portion and an insert member having a small-diameter yarn passage portion and a fluid conduit hole. When the insert member is within the housing, a complete yarn passage hole is formed through the nozzle. Because the insert member is separable from the housing, drilling of the very small diameter fluid conduit hole can be made easily and accurately prior to insertion within the housing. Furthermore, the fluid conduit opening is disposed both annularly and angularly in the downstream direction with respect to the yarn passage hole, thereby increasing the twisting action induced by the flow of jetted fluid while preventing damage to the yarn.

False-twist nozzle

An air nozzle utilized for false-twisting a fiber bundle to form a fasciated yarn, comprising, in series, an inlet and a fiber passage provided with at least a jet for generating a vortex within the fiber passage. The inlet has an opening of a flattened shape having upper and lower walls longer than the side walls thereof and has a size decreasing toward the fiber passage. The edge portion of the ribbon-like fiber bundle passing through the air nozzle strongly contacts the upper and lower walls of the inlet during the twisting operation by the vortex. As a result of frictional resistance with the walls, the twist angle of the edge portion fibers becomes less than that of the core portion fibers. This causes a tightly fasciated effect of the edge portion fibers onto the core portion fibers during the untwisting operation.

Air nozzle for fasciated yarn spinning

An air nozzle, suitable for producing a fasciated yarn, having at least one jet in each of narrow and wide passages along the traveling direction of the fiber bundle. Each jet is directed to generate a vortex whirling reversely from that of the other passage. The twist imparted to the fiber bundle by the vortex generated in the wide passage is restrained by the vortex whirling reversely thereto in the narrow passage. As a result, circumferential fibers of the fiber bundle are less twisted relative to the core portion thereof. During the untwisting operation of the vortex of the wide passage, the circumferential fibers are entangled around the core portion with a twist corresponding to the difference from the core portion, thereby obtaining a well-fasciated yarn.

Air nozzle utilized for fasciated yarn spinning

A false twisting air nozzle for use in fasciated yarn spinning and the like. The air nozzle has a fiber bundle passage for allowing a fiber bundle to pass therethrough in a direction, the fiber bundle passage including an inlet, a smaller-diameter hole portion, and a larger-diameter hole portion which are arranged in series. An air injection hole has end opening tangentially and downstream in the larger-diameter hole portion. Air passages are disposed around the smaller-diameter hole portion and held in communication with the larger-diameter hole portion for increasing the force with which the fiber bundle can be drawn into the air nozzle. The air passages may be a plurality of slots defined in an inner wall surface of the smaller-diameter hole portion or a plurality of independent holes defined radially outwardly of the smaller-diameter hole portion.

Growing community of inventors

Aichi, Japan

Hiroshi Omori