Technology of Production of Technical Belts and the Study of Their Properties

Abstract

The article developed a method and technology for the production of seamless woven tapes. Defined technological parameters of the developed conveyor tapes. The laws of change in the mass and thickness of the conveyor tape made from the treated fabric, from the grey fabric and non-woven fabric depending on the time of operation are obtained. solved by the fact that the threading of the warp is carried out in the form of a continuous spiral, then the cords and weft yarns are woven into warp yarns the on the loom. Moreover, the length of a section of fabric with non-rubbed yarn and the ratio of the diameter of the cord to the diameter of the weft yarn is at least 1:2. From the graphs, fig.5 and 6, it follows that the exploitationof the conveyor tape made of non-woven fabric is not more than three months, the conveyor tape made of grey fabric is about two years, and the conveyor tape made of treated fabric is three years.Due to the fact that the degree of adherence of the conveyor material in the tape made of grey fabricis lower by 58 % and in the tape made of treated fabric lower by 71% than in the tape made of non-woven fabric. The structure of the grey fabric contains only twisted yarns mutuallyintertwined, and the treated fabric is ultimately water-repellent preparations that reduce the adhesion of the conveyer material to the tape. On the contrary, the structure of the non-woven fabric contains fabric, stitched with twisted threads, which increase the adherence of the conveyor material to the tape.

Dynamics of the warp beam brake drive on a weaving loom for the production of natural silk fabrics

“…According to [5,14] we accept the stiffness of elastic filling system, C = 140 N/mm, therefore, from expression (1) the reduced stiffness to the middle radius of the driven disk Cpr = 10,1 N/mm. When the spring in the friction clutch is tightened λm = 12 mm, the friction forces are determined from expression (4).…”

“…In [6,7,8,11,15] it is indicated that at low speeds of mutual sliding in the friction system there are jumps, which disappear when the speed increases, besides the amplitude and frequency of jumps depends on the sliding speed, mass of the ram and rigidity of the system. It is noted, in particular, that at a uniformly low velocity of the plane the ram will make the relaxation oscillations according to the sawtooth law (Fig.…”

“…There are several theories to explain the occurrence of a jump change in friction force [1][2][3][4][5][6][7][8]. However, varied these theories may be, they all boil down to a relationship between the friction force and either the time of fixed contact or the sliding velocity.…”