JPS60146024A - Bulky processing method and apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for obtaining double yarns with a bulk of 8", especially by false twisting.

In order to simplify the explanation, the present invention is based on the false twisting method.
-Although the explanation is related to yarn, it is not limited thereto, and can also be applied to techniques such as stuffing (pushing method), bulking using gills or back passages (rubbing method). .

The main purpose of bulk 11″G processing is usually to improve the appearance of continuous multifilament yarn.
1) Increasing the width and gap ratio (height) of the fence;
Or a continuous multifilamentary yarn with increased elasticity If)
It is very common to increase the T:J conflict and void ratio.

Techniques that can perform this bulk processing are classified into two groups.

In the first group, to which the false-twisted umbrella processing techniques belong, the increased void ratio and the possibility of elasticity create mechanical strains in each hook, which can be fixed permanently by heat treatment and cooling. It can be obtained by

U.S. Special Edition No. 2,852,906M and No. 2°869.
In the second group, related to No. 967, increased bulk is obtained by passing the continuous multifilament yarn loosely through a nozzle forming a turbulent region. This region of turbulence avoids the unraveling of the multifilament yarn to form numerous turns, loops and other rotations, so that the treated yarn is wound with as low a tension as possible.

The present invention relates to a first group of devices and methods, particularly improvements to bulking methods using false twisting.

The best results have been obtained with the technique of the false-twist bulking method, except that one of the problems raised in point 11) of the current state of the art is the problem with unwinding the threads of the winding wheel. This disintegration problem is related to the improvement in the performance of current knitting and weaving machines and the increase in knitting and weaving speeds. Therefore,
It has been found that the increase in the winding of thread-wound bobbins and the increase in unwinding speeds of more than 1000 M/min are accompanied by rather important deficiencies. One way to overcome this drawback has been for engineers to change the winding conditions after bulking.

For example, additional patent application No. 77 03552 (No. 2
, No. 379,626) makes it clear that the obtained yarn does not roll easily (see page 2, line 2), so during or before rewinding, Fluffing by means of pressurized fluids as described in this patent is possible. but,
This solution requires complicated transformation of the 7Jj winding conditions;
Alternatively, it is not practical because it changes the properties (porosity, elasticity) after treatment.

Other I'iJ Notake are, for example, FR-A1, 235, 71
The aim is to subject the bulky textured yarn immediately after rewinding to anti-tangle treatment as described in No. 8. In fact, such processing, which is now frequently used in place of twisting,
Thread tack can be imparted without creating loops or turns. Although this solution helps in unwinding the formed spool, it usually has to be operated at fluid pressures significantly higher than 1 bar. This high fluid pressure considerably increases the production cost and further affects the void ratio or elasticity of the resulting bulky yarn.

A simple and inexpensive method has been discovered, which is the object of the present invention. The present invention provides a winding of bulky yarn that unravels at high speed without causing tension fluctuations or causes of breakage, while preserving the original void ratio and stretchability of the bulky yarn.

Generally, the method according to the invention allows bulking of the yarn, in particular by false twisting, and more particularly during the bulking operation C effectively allows partially drawn or non-drawn yarns, which yarns are present in the bulked areas. (Before passing through Δ, the action of the fluid flow under pressure conditions that substantially prevents the core yarn from entangling or creates only a small amount of external loops or swirls that affect between the main yarns that are subsequently processed. Special 1fi due to the fact that it receives
Re-GJ is done. Processing with such fluids is usually 0
．． It was carried out in a known manner using an anti-entanglement 11-nozzle supplied with fluid at a low pressure of 5 par.

The present invention will be described in detail below with reference to the drawings.

Referring first to FIG. 1, there is shown a bulking device with false twisting according to the present invention. This device has a plurality of processing positions, each processing 11'/ii being necessarily in the correct order, and a supply source 1 of yarn 2, such as a creel, and a yarn feeding device 3, for example to a bell 1, etc. a heating member 4 J3 and a cooling zone [5; a bulking spindle that is bulked during false twisting 6; a second yarn feeding device 7 that is similar to or different from the first yarn feeding device 3; It includes a second heating furnace 8, a third feeding device 9, and a winding member 10 for winding the treated yarn into a bobbin shape.

The invention is obviously also applicable to a bulking device in which the second heating furnace 8 is omitted, in which case the yarn is conveyed directly from the second feed device 7 to the winding device 10.

This omission is also possible in a device for processing partially drawn yarns, where the drawing is carried out simultaneously in a false twisting operation between the feed devices 3 and 7.

Easy thread unraveling when using manufactured thread bobbins
At the same time, each processing position according to the invention has an I[
It includes a nozzle 11 connected to a compressed air supply source (not shown).

This nozzle, as shown in FIGS. 2 and 3, is of simple design and consists of a body 12 with an essentially longitudinal opening 13 into which pressurized fluid '14 is blown. Preferably, the opening 13 is formed with an opening 15 through which the yarn can easily pass. Guide elements 17 and 18 are also formed on each side of the nozzle 11 in the extension of this groove 13 .

The nozzle used in the method according to the invention has a very simple design, due to the fact that the fluid pressure required to carry out the method is very low, typically 0.5 bar and the entanglement of the threads is less than 1 q. . Obviously, fairly complex nozzles can be used that cause thread entanglement, but in this case, the air pressure in the nozzle is adjusted to a level where the lead flow does not normally cause thread entanglement or entanglement. .

It has been quite unexpectedly discovered that in these conditions, by treating the partially oriented yarns, a favorable bulking treatment or normal condition can be formed. The obtained yarn has both elasticity and elasticity as compared to conventional yarns, and it is also possible to form yarns using these yarns with ease without causing virtually any breakage. I was able to solve it.

By way of example, a 70 dtex, 34 strand polyester yarn was treated according to the invention using an unwinding speed r of over 1000 M/min and a nozzle 11 supplied with a pressure of 0.5 bar. It has been found that in this case no rupture occurs. -6 In the treatment not according to the present invention, six breaks occurred in one bobbin during the same winding. These comparisons are for a model with a diameter of 250mm and a weight of 5.2k.
(), density 0.53k.

, 'dm3 bobbin.

Examples of this kind illustrate the advantages offered by the invention.

The present invention is not limited to what has been described above,
It can also be applied to other bulk processing techniques using partially drawn yarn or non-drawn yarn as the raw material.

[Brief explanation of the drawing]

FIG. 1 shows a 1-IR equipped with a blowing nozzle according to the present invention.
-△2.347.4 (side view of the conventional bulk processing equipment using the false twisting method described in No. 3G; Figure 2 is a perspective view of the nozzle necessary to carry out the method of the present invention; Fig. 3 is a sectional view taken along the axis △ of a nozzle necessary to carry out the method of the present invention. 1... Yarn supply source, 2... Yarn, 3...
...First feeding device, 4...Heating member, 5...
... Cooling area, 6 ... False twisting bulking spindle, 7 ... Second feeding device, 8 ...
...Second heating furnace, 9...Third feeding device, 1
0... Winding member, 11... Nozzle. Applicant birthmark anonym

Claims (1)

[Claims] (1) Before the yarn to be processed passes through the bulky processing member, substantial prevention of entanglement of the core yarn, that is, affecting the volume of the main yarn to be processed thereafter. Particularly false-twisted yarns characterized by being subjected to the action of a fluid stream in a pressure-horn state with only a few easy external loops or hk turns, and more particularly partially drawn yarns or non-drawn yarns formed during bulk processing. A bulking method for bulking yarn. (2) The fluid treatment is carried out by means of an entanglement VjII nozzle supplied with fluid at low pressure. The bulking method according to claim 1. (3) The anti-tangle nozzle supplies air at a pressure of about 0.5 bar.
Bulky processing method described in section. (4) having a plurality of processing positions, each processing position necessarily in normal order, having a supply of yarn such as a creel, a first yarn feeding device, e.g. , a false twisting spindle with an 8-inch twisting rack, a second feeding device similar to or different from the first yarn feeding device 3, a second heating furnace, a third feeding device, etc., for processing the yarn after processing. a winding member for winding into a bobbin shape, and a nozzle connected to a source of pressurized fluid is formed between the yarn supply source and the first yarn feeding device. High processing equipment. (5) The nozzle consists of a body essentially provided with a longitudinal groove into which pressurized fluid is blown; the body is formed with an opening [1] through which the thread can easily pass, and an extension of the groove. 5. The bulking device as claimed in claim 4, characterized in that guide elements are formed on each side of the nozzle in the direction.