KR810001718B1 - Fiber opening apparatus for an open-end spinning machine - Google Patents

Abstract

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Description

Opening device of open and spinning machine

FIG. 1 is a front view of an opening area of an open end spinning apparatus, in which a cover is removed to show an opening element.

FIG. 2 is a side view of the open area of FIG. 1 taken along line II-II. FIG.

3 is an enlarged cross-sectional view showing in detail a fiber conveying passage in a partial side view taken along line III-III of FIG.

4, 5, and 6 are enlarged cross-sectional views showing modified portions of the fiber conveying passage.

The present invention relates to a retrofit of an apparatus for treating open end spun yarn, in particular a sliver supplied to the open area of such a device to open the action therein.

In a known method for treating open-and-spun yarn, the next fiber conveyed by a rotating islet roller by installing a needle protruding from its main surface in order to separate and open the fiber in the islet area is opened. The main surface of the roller is conveyed to the inlet of the fiber conveying tube, through which the fiber is conveyed in the spinning rotor.

The opener roller was hypothesized to be rotatable in a circular recess formed in a housing.

The diameter of the recess is slightly larger than the diameter of the opening roller measured on the tip of the needle or tooth.

The periphery of the opener roller is usually cylindrical, and forms the fiber conveying passage of the short end surface by the parallel subsurface of the recess and the inner surface of the lateral flange usually provided on each side.

Such a configuration is described in British Patent No.1368886 and US Patent No. 4058965.

However, in operation, it has been found that the fiber cross-section of the short cross section does not provide the optimum opening condition. In particular, it has been found that the fibrous material tends to transfer within the lateral gap between the side of the opener roller and the adjacent surface of the housing past the flange in the fiber transport passageway.

Sedimentation of fibrous material in this transverse spacing impedes the rotation of the carding roller, and as a result, there is a fear of damaging the components of the carding roller and the possibility of breaking the yarn.

British Patent No. 1333526 describes a carding system configured to allow the supplied sliver to be opened by the first carding roller and then to be carded again by the second carding roller.

In FIG. 10 of the above specification, various forms of the main surface and the adjacent recessed surface of the open island roller are combined in various shapes of the fiber conveyance passage.

In FIG. 10 and FIG. 10d, the radial distance between the main surface and the adjacent recessed surface of the open island is larger at the midpoint than the distance at both sides.

Each tip of the dog needle protrudes from the main surface at equidistant distances.

This configuration is described in the patent specification as being designed to prevent combing actions that tend to damage the fibers in the short fiber transport passage.

However, it was incredible to provide a carding operation that would satisfy the above arrangement.

The wide end between the tip of the needle and the recessed surface, and the inconsistent radial distance, result in insufficient open seam.

This is because the fibers tend to be deposited on the lumbar surface by centrifugal force without acting by the needle.

In this situation the fiber tends to curl up into a spherical state, which leads to confusion in the spinning yarn process, and if it reaches the fiber collecting surface, at least adversely affects the properties of the yarn.

In this known configuration, the fiber control means is not provided, so that the problem of transferring the fibers from both sides of the opening roller in the fiber transportation passage cannot be overcome.

The same configuration as described above is described in Japanese Patent Publication No. 75-35138, and it is claimed that the problem of damage to fibers can be overcome. However, even in the configuration, the above-described drawbacks could not be eliminated, which is also an insufficient configuration.

It is an object of the present invention to provide improved carding conditions during operation as a device for opening fibers from slivers in open end spinning machines, in particular the lateral spacing between the two sides of the carding rollers and adjacent housing surfaces in the fiber transport passage. It is intended to provide for reducing the tendency to migrate within.

In order to solve the above problems as described above, the present invention is to allow the radial distance between the imaginary surface including the tip of the needle and the mother surface to be curved at the midpoint of the length of the mother surface to the maximum at the mid-plane length .

It is preferred that the opener rollers have a circular transverse flange on each side of the main surface, the flanges having an inner facing surface constituting the width of the fiber conveying passage, and the facets of the main surface mutually guide the common valleys from the inner surfaces of the flanges. It is formed by a continuous arc.

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

The housing 1 has a cavity 2, in which the rotating sliver feed roller 3, the conveying plate 4, and the rotating opener roller 5 are arranged.

The cavity 2 has a first curved portion 6 which is formed so as to partially and concentrically surround the outer circumferential surface of the transfer roller 3.

Moreover, the cavity 2 has the curved part 7 which formed the open island roller 5 partially and concentrically surrounded.

The curved fiber positioning surface 8 is adjacent to the opener roller 5 in the conveyance plate 4, and is the same as the outer diameter, and is arc-shaped.

The curved portion 7 and the fiber positioning surface 8 of the cavity 2 thus form a recess that almost completely encloses the opener roller 5.

The spring 9 presses the conveying plate 4 against the conveying roller 3 and constitutes a nip for conveying the sliver like the conveying roller 3, and the conveying plate 4 has a fiber positioning surface ( 8) It was attached so that it could be forcibly driven along the outer diameter and concentric passage of the dog-opening roller 5.

Suitable methods of attachment to the transfer plate 4 are described in British Patent No. 1,368,886.

The fiber feed tube 10 is in communication with the cavity 2 and the fiber feed passage (not shown in the figure) useful for conveying the fiber to the spinning rotor (not shown in the figure).

The cavity 2 was provided with a cover 11 in the housing 1 so as to cover the transfer roller 3, the transfer plate 4, and the opening roller 5.

As shown in FIG. 2, the opener roller 5 is attached to one end of the shaft 12 supported by the bearing 13 in a rotational manner.

In the figure, only one bearing 13 is shown.

Since the shaft 12 extends rearward from the housing 1 and is connected to a drive belt (not shown in the drawing), the opening roller 5 is rotated by the drive belt.

On the other hand, in Fig. 3, the opener roller 5 has a flange 14 on each axis, and the flange 14 has an inner surface 15 and an outer surface 16.

The outer surface 16 of the flange, together with the adjoining surface of the housing 1 and the cover 11, constitutes small lateral spacings 17, 18, respectively.

The main surface 19 extends between the inner surfaces 15 and 15 of the flange 14, and a plurality of needles 20 protrude from the main surface 19.

The needle 20 protrudes on a spherical main surface 19 formed by the inner surface 15 and the main surface 19 as described in US Patent No. 4058965.

The tips of the needles 20 respectively end in a virtual cylinder surface formed by a straight line with respect to the rotation axis of the open roller 5, and the virtual cylinder has a diameter corresponding to the outer diameter of the flange 14, whereby the needle 20 ) Is maintained at the same distance as the opening position determining surface (8).

The radius of the flange 14 is slightly smaller than the radius of the fiber positioning surface 8 and the fiber positioning surface 8 and the main surface 19 carry the fiber to the inner surface 15 of the flange 14 at each axial axis thereof. A passage 21 is formed.

In operation, the sliver S is supplied into the passage of the needle 20 protruding from the main surface 19 of the open island roller 5 through the nip formed by the feed roller 3 and the conveying plate 4 which are rotated. .

Therefore, the fiber is separated from the sliver S and is conveyed through the fiber conveyance passage 21 by the opening roller 5.

The fibers are transferred from the opener roller 5 to the fiber feed tube 10.

When the fiber is conveyed to the spinning rotor in the opened state through the fiber supply pipe 10, it is collected therein to become a spinning yarn.

Improvement in spinning process and yarn properties by modifying the space of the fiber conveying passage 21 so that the radial distance between the main surface 19 and the fiber positioning surface 8 is maximum at the midpoint of the two inner surfaces 15. This has been found by the inventor.

In particular, in FIG. 3, the main surface 19 is curved, and has a radius of curvature R ₃ , which forms a gentle arc between the two inner surfaces 15, 15 of the flange 14.

The radius of curvature R ₃ of the arc is about 23 mm in length and the depth D of the string with respect to the width of the main surface 19 is 0.5 mm.

It is appropriate that the string depth (D) does not exceed 1.5 mm.

Thus, it forms a fiber transport passageway 21 on both sides of the radial distance between the main surface 19 and the fiber crystal surface 8 toward the center thereof.

The gaseous cylindrical surface having the tip of the needle 20 opens and carries the fibers together with the adjacent fiber positioning surfaces 8 at intervals of 0.15 mm.

In this way, the formation which makes a fiber vibrate between the needle 20 and the fiber crystal surface 8 can be prevented.

Maintaining a narrow gap between the tip of the needle 20 and the fiber positioning surface 8 is the most important point in the design of the opening area.

It has been found by the applicant that the spacing above 0.16 mm degrades the quality of the open end yarn.

The fiber positioning surface 8 is not necessarily located on the supply plate 4 but is formed as part of the housing 1.

The present invention relates to the improvement of the carding action, and it has been found by the present inventors at the time of operation to reduce the tendency of the fibers to transfer from the fiber conveyance passage 21 to the transverse spacing 17, 18.

4, 5, and 6 are alternative forms of the main surface of the opener roller 5, in which the distance between the main surface 19 and the fiber positioning surface 8 is maximized at its midpoint. In the embodiment of FIG. 4, the mother plane of the main surface 23 has an arc-shaped central portion 23 having a radius of curvature R ₃ , as in the case of the embodiment of FIG. ₃ .

The arc center portion 23 is connected to the inner surface 15 by an arc side portion 24 having a radius of curvature R ₄ smaller than the radius of curvature R ₃ .

Thus, the groove in which the needle 20 protrudes is formed by a continuous surface which does not have an acute angle that may provide a fiber deposition point.

The fifth escape 25 of the main surface can also be formed in its entirety by Wonhyo with a radius of curvature (R _5).

This arc extends between the bore diameters of the flanges 14, the strings of which coincide with the virtual cylindrical surface having the tip of the needle 20.

Also in this embodiment, the groove into which the needle 20 protrudes was formed by a smooth continuous surface without an acute angle.

In the embodiment shown in FIG. 5, the mother surface of the main surface 26 becomes the straight center part 27 located in parallel with respect to the rotation axis of the open roller 5. As shown in FIG.

The central portion 27 is connected to the inner surface 15 by the inclined side portion 28.

Claims (1)

A recess having a fiber positioning surface formed in the housing, and rotatably attached to the recess, a plurality of needles protruding from the main surface thereof, the tip of each needle being equidistant from the fiber positioning surface having a virtual cylindrical surface, In the open end spinning machine which forms the fiber conveying path together with the fiber positioning surface, the main surface of the opener rollers has the radial distance between the main surface of the main surface and the virtual cylindrical surface to be curved at the midpoint of the main surface, and the radius of curvature of the main surface Opening machine for open end spinning machine characterized in that the arc formed between the inner surface of the flange and the depth of the string is 0.15mm ~ 1.6mm, the tip of the needle is 0.15mm ~ 0.16mm equidistant from the fiber positioning surface .

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