SU1601241A1 - Combination ribbon - Google Patents

Abstract

The invention relates to general engineering and can be used as a reinforcing aggregate in the manufacture, for example, of jacketed pipes by the winding method. The purpose of the invention is the expansion of technological capabilities and ensuring reliable fixation of the half-belt of the combined tape relative to each other. The combined ribbon contains two mutually intersecting half-tape, forming an X-shaped profile in section, made of transversely arranged and alternating rods intertwined with longitudinal threads. In the loops of the longitudinal threads fastening the ends of one side in each semilent, there is a freely sliding rigid linear longitudinal thread with which you can change the angle of the rods. Rigid fixation of the semi-tape in the ribbon relative to each other is provided by longitudinal threads interlacing the rods in the places of their crosshairs. 6 Il.

Description

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as a reinforcing filler telG "Oi 1

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or approaching the branches of the tape and making an optimal opening angle. This angle

can vary from 0 to 180 °, but at angles of 0 and 180 °, the tape becomes flat and it is irrational to use it as a reinforcing element. Therefore, the workers selected angles of 10-170 °, and the optimal angle

90 °. Linear elements constituting

The olulents, in the form of rods of any length, the length, diameter, or size of the side of the second, are determined by design considerations depending on the specific use of the tape made of them, as well as on the conditions of their carrying capacity.

 When installed, the ribbons in the product, the sheath beam, etc.) the interlacing of the rods of the rods 6 fixes their position, ensures their joint operation under the action of the system of forces. The presence of a bond between the rods of the tape increases the strength 1 and the stability of the latter in comparison with the known tape.

 In order to obtain the pulses, the rods are laid parallel to each other with a step equal to their diameter (round rods) or to the side of their profile cross-section they impose a rigid linear longitudinal thread on their ends on one side and simultaneously twist the ends of the rods together with the laid linear longitudinal thread longitudinal thread, plant them above and below the rods in alternate order. Thus, the linear longitudinal thread is located in the loops of the longitudinal thread, but. without being rigidly fastened with them and with the rods, it has the freedom to slip in the loops. The material of the linear longitudinal threads may differ, or may coincide with the material of the rods.

Changing the step of laying rods in the pollen is undesirable; step reduction is not possible, increasing the step leads to a decrease in the rigidity of the tape and to the impossibility of using it as a reinforcing element.

The combined ribbon is formed from two half-waves, placing the rods of one half-tape with the other-half rods, and at the same time receiving a flat, as if solid pseudo-tape (without visible ring). To form a single structure, the tape itself, constituting the pseudo-tape semi-tapes are additional yarns, which, in succession. intertwine the rods of both half-paths at their intersections, fix their relative position and provide

25: 3

the possibility of their angular displacement relative to each other.

The offered tape has the ability to turn from flat to bulky, which provides the opportunity. using it as a reinforcement element for panels, pipes, and shells. Due to the freedom of movement of the rods in the half-tubes relative to each other, the tape can be a filler of sheath pipes with a large difference in the diameters of their outer and inner shells. When laying on a steep convex (concave) surface, the rods are fan-shaped due to the rigid linear longitudinal yarns that slide along them, and the freedom of distribution of the fan in the loops. This freedom provides the possibility of laying the tape along almost any trajectory. Known tape does not have this ability. All of the above expands the technological capabilities of the tape.

Example. For the manufacture of a tape intended for use as a reinforcing core of the internal cavity of a model thin-walled hollow frame of rectangular cross section, rods 0 are cut with a diameter of 1 mm and a length of 3 mm (diagonal of the cross section of the frame 32 mm plus the grooves where the rods are 2 mm) mz bar material obtained by the method of pultrusion 5 (drawn through a heated forming die) from the tows of carbon fiber impregnated with phenol-formaldehyde resin. The rods were laid in increments equal to their diameter, i.e. 1 mm. On one side at 0, their ends laid a linear longitudinal thread made of organic fiber impregnated with epoxy resin, at the same time twisted the points of contact with two nylon threads so that the linear longitudinal thread was freely slipping in the loops of the longitudinal threads . It turned out half a tape. By repeating the operations, the second half-tape was made. After that, the half-tape was inserted one into the other with its free ends and the rods were intertwined with nylon threads in the place of their intended cross (in this case in the central part), covering each stem with one thread from above, the other with - 55 memory. The result is a finished ribbon, which is used as a reinforcing filler in the cavity of the frame, for tea in the grooves 7 (Fig. 6) mounted on the mandrel 8 of the frame 9, linear longitudinal threads 5 are fixed. When the mandrel 8 rotates

using linear longitudinal threads 5, the ends of the rods are threaded into the grooves 7 and secured with glue. Longitudinal threads 4 in places of crossings of the rods keep the rods from axial displacements. After installing and fixing the tape, winding is performed on the free ends of the rods of the upper facing layer of the product.

The known tape, due to the absence of reliable fixing of its linear elements relative to each other in the places of their crosshairs, cannot take a rigid volumetric shape with a given angle of opening of the rods and is therefore unsuitable for use as a reinforcing core.

The proposed tape is convenient for storage (easily wound into a roll), does not create difficulties in application, increases the rigidity and strength of structures, creating a support for linings and protects them from loss of stability under loading. Depending on: the specific requirements for the construction, the tape can be

 one

0

five

0

make both with sections of rods equally spaced from its central axis, and ti with areas of unequal length.

Claims (1)

Formula of images, eteni Combined tape containing two cross-sectioning polylents forming an X-shaped profile in cross section, each of which is made of transversely arranged linear elements interlaced with longitudinal threads, in order to expand technological capabilities and provide reliable fixation of the semi-valent one relative to the other; in the places of the half-woven cross, their linear elements are fastened with additional threads by interlacing them at the points of contact; ente interdigitated linear elements at least by one of their ends, the elements are arranged in a linear ih.petl x to be longitudinally movable and are in the form of rods. 7 3. 3 Fi.Z Fiel Phie.