SU46201A1 - Instrument for measuring the tension and elongation of the rubber thread base on ribbon-weaving machines - Google Patents

Description

Tension of the base, both paper and rubber, on band-weaving machines is usually established experimentally, and the breakage of the base during the formation of the throat is crucial. The tension of the rubber thread of the base is also determined subjectively by the eye, which makes it impossible to fully use the elastic properties of rubber and to establish the correct expenditure of it. Tension testing is necessary both to reduce the consumption of raw materials (especially rubber), and to ensure high quality of manufactured products, as well as due to the fact that the properties of individual incoming batches of rubber, due to the different treatment mode (vulcanization), as well as improper section threads are different. This creates a difference in the fit of the tape, the quality of the tape and the uneven consumption of raw materials.

In order to eliminate the subjectivity in determining the degree of rubber tension and the possibility of measuring and expressing it with specific units when comparing between machine tools and for conducting all sorts of research works in order to use the full extent of elastic properties and reduce rubber consumption, this invention is intended.

(218)

In the schematic drawing of FIG. 1 is a front view of the device, and FIG. 2-cut it.

The proposed device is a copper tube 7, inside which a spiral spring 4 is installed, abutting against the cover 7 and the bottom 7a. The upper end of the spring is attached to plate 6 and arrow 9, which comes out through hole 10. Bottom hook 5 is attached to the plate. If the hook is pulled, the spring begins to compress and arrow 9 goes down. Depending on the degree of compression of the spring, the arrow stops at different scale divisions. The scale 2 is calibrated for tension from 0 to 400 g. In addition, the plate 5 can freely move inside the spring in a special guide tube J4 of elliptical cross section, soldered to the top cover 7. A vise is attached to this plate 5. The vice consists of two jaws pressed to one another, and this clamping is carried out using a spring mounted on the axis 77.

When pressed on the foot 2, the vise opens and the jaws 75 and / 3 can grab the rubber thread, the test length of which is 50 mm. There is a scale on the outside of the grip and on their extension (plastic 5).

graduated in accordance with the percentage of elongation of the rubber thread during the test.

The operation of the instrument is as follows. On a weaving loom, a stretch of rubber thread after the roller is clamped along the length of the jaws 13 and 13 of the clutches. A length of 50 mm is clamped and tested. Hook 3 picks up the rubber and, if we start to lift up tube 6, the hook will rise depending on the elasticity of the rubber, and arrow 9 will indicate the tension of the rubber thread. The vise and plate 5, being fixed all the time, due to the lifting of the tube and hook, will show on the scale (hook position) the percentage of elongation of the thread.

thus checking the tension;: rubber thread, you can, change the weights on

set the maximum tension of the thread and get the aconomy of its expenditure, the correct Density, fabrics and the correct mode of operation for all articles and machines.

The subject matter of the invention.

An instrument for measuring the tension and the relative elongation of the rubber yarn base on band-weaving machines, consisting of a tube, inside which is placed a coil spring with a rod having a hook at the end, characterized in that a tube, 14, is placed inside the coil spring to the lid 7 and serving as a guide for the plate 5, at the end of which a fixed sponge 13 is fixed with a rotatable movable sponge 13.