SU1326648A1 - Twin-apron drafting system for flax wet spinning machine - Google Patents

Abstract

The invention relates to textile IMPROVEMENT - to two-mesh stretching devices of a wet flax spinning machine and allows to improve the quality of the drawn fibrous product, reduce its breakage and increase the service life of the straps. At least one of the two exhaust device straps put on the feeding rollers contains hydrophilic fibers i partially protruding on the outer surface of the strap in the outer rubber layer i The length of the protruding fiber sections is 40–200 µm with their number of 1500–3500 fibers per I cm of outer the strap surface, Hydrophilic fibers absorb moisture deep into the strap until saturation and hold the smallest droplets of moisture on the outer surface of the strap, thus ensuring - even and constant moisture ix drawn fiber product, improve its quality and reduction of rsh used but ti..2 yl. i l & 0 th

Description

132

The invention relates to textile industry and can be used in wet spinning flax.

The aim of the invention is to improve the quality of the stretching of the fibrous product, reduce its breakage and increase the service life of the straps.

Fig. 1 shows the exhaust device 5 in Fig. 2 - the same, side view,

A two-strap device contains a power supply of rollers and 2 on which two endless rubber straps 3 and 4 are worn, at least one of which contains partially protruding hydrophilic fibers 5 in the outer rubber layer. The working surfaces of the endless straps 3 and 4: one to the other by means of plates 6 and 7 of the pressure lever 8. The straps adjoin the outlet pair 1 of the rollers 9 and 10, having a cleaning roller 11.

I The length of protruding portions of hydrophilic fibers on the outer surface of the strap is 40-200 µm, and their number is J500

3500 fibers in 1 cm of the outer surface of the strap,

The two-belt exhaust device operates as follows.

Moisture obtained by the roving trough 13 of the machine is pressed from the roving by the feed pair and then partially returned to the roving when it passes between the endless straps 3 and 4j in contact with the water film present on the working surface of the hydrophilic strap. Then, passing the outward pair of rollers 9 and 10, the elongated roving is placed on the spool by means of a ring and a runner.

The number of fibers protruding onto the outer surface of the strap determines the uniformity of covering the surface of the strap with a film of moisture and affects the yield of the strap.

The dependence of the breakage of flax-yarn yarn with a linear density of 24 tex on the number of protruding fibers on the surface of the strap follows:

Quantity Breakage on protruding 100 spindles of fibers per hour

on 1 cm of a surface of a thong

More than 100

85-95

70-75

56-60

50-60

50-60

In case of absence on the surface-v. these straps of hydrophilic fibers, due to their hydrophobicity, do not hold moisture on their surface, as a result of which

but the moistened roving has a pronounced brittleness, which is reflected in increased obryshnosti and reduced life of the strap due to crochet cuts when unwinding. In the presence of hydrophilic fibers (for example, cotton or viscose fibers) protruding onto the outer surface of the strap in the hydrophobic rubber layer, moisture is absorbed into the strap until we find it;

the protruding portion of the fiber forms and maintains a tiny droplet of moisture, obtained by the strap when squeezing moisture out of a roving or from a dropper installed above the strap,

With a small number of such areas (100-300 fibers / cm J, and hence the smallest droplets On the surface of the strap, not connected to each other or connected

foci, uneven occurs

moistening of the roving, which also contributes to the increased breakage of the yarn. An increase in the number of protruding fibers contributes to an increase in the number of droplets on the surface of the strap and joins them into a single film with an amount of 1500 fibers / cm, which contributes to a better wetting of the platform, and, as a result, to a decrease in

obryshnosti. The best properties have straps, on the surface of which acts 1500-3500 fibers / cm. With an increase in the number of protruding fibers 1 cm above 4000, the amount of moisture has virtually no effect on the properties of the fibrous product. However, the excess fiber content in the outer layer of rubber leads to a deterioration of the physical and mechanical properties of the product (such as strength, abrasion, etc.) and a drastic reduction in the service life of the straps.

The dependence of the breakage of the elongated fiber product on the length of the protruding sections of hydrophilic fibers in the production of 24 tex textiles using straps containing in the outer layer an optimal amount of protuberances of 1500-3500 fibers / cm is as follows:

m

100 spindles per hour

More than 100 70-90 56-60 70-85 More than 100

With a length of less than 4 microns, high. The product's size is explained by the practical absence of moisture on the surface of the strap (similar to a hydrophobic surface). With increasing this length -. 200 microns With a longer length, an increase in obliquity is observed, since the length of the protruding fibers becomes commensurate with the thickness of the processed roving and the villus meshes with the fibers of the product to be processed, which reduces the quality of the exhaust.

In the proposed exhausting device, the straps due to the absence of perforations on the straps, weakening them and imparting an uneven strap surface:. nosti, have a service life of 3-4 times

more of the prototype with better control of the fibers by pulling the fibrous product and with reduced visibility,

Claims (1)

Invention Formula A two-webblade wet spinning spinning machine containing a feeding roller pair with two endless rubber straps and a stretching roller pair characterized in that, in order to increase the quality of the stretched fiber product, at least one of the straps contains, in the outer rubber layer, hydrophilic fibers partially protruding on the outer surface of the strap, while the length of the fiber sections protruding on the outer surface of the re: bag is 40-200 μm, and their number is em 1500-3500 fibers per 1 cm outer surface strap. ig.1 ten / / 3 Yu (Rig.2 Editor T. Parfenova Compiled by N.Timofeeva Tehred L.Oliynyk Order 3252/23 Circulation A27 Subscription. VNIIPI USSR State Committee on affairs of inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab; 4/5 Production and printing company, Uzhgorod, Projecto st., 4 Proofreader V. But ha