Patent RU-2653052-C2 (RU)
Inventor: NIKOLAEV VLADIMIR SEMENOVICH
IPC: D01H13/04
Filed: 2016-05-31
Granted: 2018-05-04
Abstract: FIELD: textile. 
     SUBSTANCE: use: to form a continuous fibrous tape with a specified linear density from the transported band. Summary of the invention: the method provides a continuous process for forming a compact fibrous web which consists in transporting flattened fibers in the form of a band in a tape forming apparatus and changing the path length of the central fiber stream to a value equal to the path length of the outermost sidewall of the fibers; the device comprises the length of the profile of the central part of the channel, in the first approximation equal to the length of the profile of the extreme lateral part of the channel, the central and lateral sections being connected by smooth curvilinear transitions, and the cross-sectional area of the entrance area of the channel is equal to the cross-sectional area of the outlet zone of the channel; the channel of the device has an upper and a lower wall of a curved profile, and the side walls are straight; the device is defined by the cross-sectional area of the lateral part of the channel which, as it moves away from the inlet, changes its geometric dimensions and remains constant in value, the central part of the channel being formed with a gap equal to the height of the inlet slit-like opening, and is at least two-thirds the length of the profile of the central part of the channel. Positive effect: it is achieved by establishing the length of the path of the central fiber stream approximately equal to the length of the path of the end portion of the fiber streams, eliminates the degree of displacement of the fibers along the length of the belt and causes the preservation of the quality characteristics of the previous technological process in the machine, namely, the resulting linear density in the section of the fibrous material; provides impact on moving fibers and allows uniform folding of fibers in the longitudinal direction, without violating the structure of the longitudinal position of the fibers after the previous process; provides the direction of the lateral portion of the fibrous flow to the central portion of the flow of the pulp in the shortest possible way, which determines the length of the curved central portion and provides a compact structure of the device; provides fillability of lateral sections with a fibrous flow with a gradual transition to the central fibrous flow, followed by transformation into a tape, without disturbing the longitudinal displacements of the fibers, and making the central part of the channel with a gap equal to the height of the inlet slit-like opening, at least two-thirds of the length of the profile of the central part of the channel, retains the longitudinal position of the fibers after the previous process and causes the formation of a compact fibrous tape. 
     EFFECT: technical result: effectively provides a continuous process of forming a compact fibrous tape from the sliver, which consists in conveying the flattened fibers in the form of a band in the tape forming device and changing the path length of the central fiber stream to a value equal to the path length of the outermost sidewall of the fibers. 
     4 cl, 7 dwg