JPS63532B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to open-end spinning machines, and more particularly to fibrous sliver capacitors for use in such machines.

The invention is particularly suitable for use in hydrodynamic spinning machines where the main working member is a spinning chamber into which the separated fibers are fed.

It is known that one of the factors influencing the quality of spinning, especially the uniformity, is the uniformity of the feeding of the separated fibers into the spinning chamber. Such uniform feeding can be obtained, for example, by uniformly distributing the fibers over the entire cross-section of the sliver when feeding the fibers into the separating device (carding device or drawing device). It will be done.

Slit capacitors of various designs have been used to uniformly distribute the fibers throughout the sliver.

As is conventionally known, the capacitor is placed upstream of the drawing device (US Pat. No. 3,947,923).
(see issue). This capacitor is formed as a triangle with elements forming vertical slits in it, allowing downward movement of the sliver (roving) as it travels along the thicker section. The movement of this roving is restricted by bridges. The sliver assumes an arbitrary position within the capacitor.

However, such movement of the sliver, i.e. movement of the sliver under gravity, creates a tendency for the sliver to clump together and become thicker in the center of the capacitor, so that the sliver is not evenly fed into the drawing device. The quality of the drill strip will be inappropriate.

A relatively uniform distribution of the fibers within the sliver is obtained by using a capacitor which is prior art to the present invention (see German Patent No. 2359176, published May 30, 1794). This capacitor has a casing with a built-in passage for the sliver,
The passage becomes progressively narrower in the direction of movement of the sliver. On the exit side of the sliver, the end of the channel is a rectangular opening, and the interior of the channel is provided with opposing projections extending at an angle to the longitudinal axis of the channel.

The provision of these opposing protrusions provides a uniform distribution of fibers throughout the sliver.
This is because the projections engage the sliver and push the excess fibers from the center of the sliver to its lateral parts.

However, if the structure of the sliver is such that the maximum amount of fibers is at the edge of the sliver and the minimum amount of fibers is in the center of the sliver, the protrusions of this prior art capacitor cover the entire cross section of the sliver. It is no longer possible to distribute the fibers evenly across the fibers.

The present invention aims to provide a sliver capacitor in which channel protrusions are created and arranged in such a way as to distribute the fibers uniformly over the entire cross-section of the sliver, thereby improving the spinning quality. It is something.

To achieve this purpose, the casing is provided with a passageway, said passageway gradually narrowing in the direction of sliver flow and terminating in a rectangular opening, with said passageway having a longitudinal axis within said passageway. In accordance with the invention, in a sliver capacitor comprising opposing projections extending at an angle to the passageway, each projection extends over the entire length of the passageway on each side of the longitudinal axis of the passageway; Opposing protrusions cross each other.

By providing protrusions extending over the entire length of the channels and crossing each other, a uniform density of fibers over the entire cross-section of the sliver is achieved. That is,
This is because one fin or projection displaces the excess fibers towards one edge of the sliver, and the other fin extending in the opposite direction displaces the excess fibers towards the other edge of the sliver.

To simplify manufacturing, each of the projections is made in the form of a step.

In order not to damage the sliver structure in the central part of the sliver and to avoid breaking the shaped stream of fibers at the sliver exit from the condenser channel, the protrusions inside said channel should be removed from the sliver on the side of the sliver exit from said channel. Preferably, the distance between the projections is equal to the maximum transverse dimension of the outlet opening of the passageway.

In order to improve the degree of action on the thicker parts of the sliver in the inlet and working areas, the projections are placed in the passage, the distance between them on the side of the sliver entrance into the passage being equal to the maximum transverse dimension of the passage. It is preferable to set it so that it is 0.4 to 1.0 times. When processing ordinary slivers in the condenser, ie slivers with a convex lenticular cross-section, the distance 2a is chosen equal to 0.4. In this way, the main amount of fibers is in the center of the sliver, and the strongest action of the protrusions, which displaces and removes this thicker part towards the edges, occurs in the center of the sliver.

When using a capacitor for a sliver with enlarged edges, the distance 2a is equal to 1.0. That is, a strong effect of the protrusions takes place at the edges of the sliver, displacing the thicker parts of the edges towards the center and removing them.

The capacitor according to the invention is suitable for use in a drawing device having a feeding device with a sliver clamp line arranged at an angle to the flat side of the sliver. In this case, the distance between the surfaces of the projections measured on the side of the entrance opening of the passage is made larger than the maximum dimension of the exit opening of the passage.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The sliver capacitor of the invention has a casing 1 (FIG. 1) with a passage 2 (FIG. 2) inside. The channel 2 gradually narrows in the direction of sliver flow and terminates in a rectangular opening 3 (FIG. 1). The passage 2 is defined by a pair of walls 4 and 5, the latter being wider than the fourth.

The passageway 2 is provided in its interior with opposing projections 6 formed on a wide wall 5. The above protrusion is
They extend at an angle α to the longitudinal axis 7 of the passageway 2 and cross each other. That is, the projections extend in opposite directions, as shown in FIGS. 1, 3, and 4. This configuration of the protrusions makes it possible to eliminate clumping of the fibers by drawing the fibers apart in opposite directions within the sliver, thus making it possible to distribute the sliver uniformly over the entire cross section. can be converted into

The projections 6 (FIG. 2) have a distance 2a between them on the side of the entrance of the sliver to the channel 2 (a being the distance from one projection to the longitudinal axis of the channel) of the entrance opening 8 of the channel 2. It is arranged in the passageway 2 such that it is 0.4 to 1.0 times the maximum transverse dimension.

Said distance 2a is equal to 0.4 times said maximum dimension in the case of application for feeding a normal sliver, i.e. a convex lenticular cross-shaped sliver, into a sliver condenser; If the sliver is applied to feed a large sliver to a sliver capacitor, the maximum dimensions above should be
Equal to 1.0 times.

5 and 7 show another embodiment of a sliver capacitor, each of the opposing projections being formed as a step 9. FIG. The steps also extend at an angle α to the longitudinal axis 7 of the channel 2 (FIG. 6), such that the distance b between them on the side of the sliver exit from the channel 2 is It is arranged in said passage so as to be equal to the maximum transverse dimension of the opening 3.

The sliver capacitor described above works as follows.

A sliver 10 (FIG. 8) is inserted into the sliver condenser on the side of the inlet opening 8 of the passage 2, passes along this increasingly narrow passage and exits in a focused state through the slit-like opening 3. Go. When passing through said passage, the enlarged portions c of the sliver 10 engage the protrusions 6, 9 and are displaced in mutually opposite directions, as indicated by arrows A in the drawing.

This ensures a uniform distribution of the fibers over the entire cross-section of the sliver at the exit of the sliver condenser, thus resulting in a high degree of separation of the fibers and thus also an improved quality of the yarn produced therefrom.

It is well known that sliver in cans or wound on spools is flattened under pressure.

On the other hand, as shown in FIG. There are structures that extend at an angle.

In such a case, the sliver is fed with its narrow side to the clamp and distributed along the line of the clamp in clusters of arbitrary shape.

In order to obtain a better separation of the fibers and thus also to improve the quality of the spinning, it is preferred to orient the flat side of the sliver along the clamp line. This is achieved by using the sliver capacitor of the present invention.

As shown in FIG. 9, the sliver 10 has a dimension d
The sliver is fed to the inlet of the sliver condenser with both edges of the sliver between the walls having steps 6, 9. As the sliver is moved, the steps act more strongly against the edges of the sliver, causing it to rotate, so that the flat part of the sliver is moved by the pair of feed rolls to the exit. It is oriented along the maximum dimension b of the aperture, ie along the clamp line of the fiber. In order to prevent the edges of the sliver from being damaged due to rapid narrowing, the distance d between the walls provided with the projections must be smaller than the maximum transverse dimension b of the outlet opening of the sliver capacitor. It is preferable to make it large.

[Brief explanation of the drawing]

FIG. 1 is a front view of the sliver capacitor of the present invention seen from the entrance opening of the passage, and FIG.
3 is a sectional view taken along the - line in FIG. 1, FIG. 4 is a sectional view taken along the - line in FIG. 3, and FIG. 5 is another embodiment of the sliver capacitor of the present invention. 6 is a sectional view taken along the - line in FIG. 5, FIG. 7 is a sectional view taken along the - line in FIG. 5, FIG. 8 is a cross-sectional view of the sliver capacitor, and FIG. FIG. 2 is a perspective view showing a state in which the sliver capacitor of the present invention is used in a drawing device. 2... Passageway, 3... Passage exit opening, 6, 9...
...protrusion, 10...sliver, 8...inlet opening of passage, 7... longitudinal axis of passage, 2a...distance between protrusions on the sliver inlet side to the passage, b...protrusion on the sliver outlet side from the passage mutual distance.

Claims (1)

[Claims] 1. A casing with a passage that gradually narrows in the direction of the sliver flow and terminates in a rectangular opening, the passage having an internal space at an angle with respect to the longitudinal axis of the passage. A sliver capacitor for an open-end spinning machine comprising opposing projections extending across the passageway, each of said projections 6, 9 extending over the entire length of said passage on each side of said longitudinal axis 7 and extending across each other. A sliver characterized by
capacitor. 2. A sliver capacitor according to claim 1, characterized in that each of the projections 6, 9 is made in the shape of a step. 3 said protrusions 6, 9 are arranged in said passage 2 such that the distance b between said protrusions on the exit side of the sliver 10 from said passage 2 is equal to the maximum transverse dimension of the outlet opening 3 of said passage; A sliver capacitor according to claim 1, characterized in that: 4 The distance between the protrusions 6 and 9 on the entrance side of the sliver 10 to the passage 2 is 2a.
is 0.4 of the maximum transverse dimension of the inlet opening 8 of the passage 2.
2. A sliver capacitor according to claim 1, wherein the sliver capacitor is arranged in the passage 2 so that the sliver capacitor is between 1.0 and 1.0. 5 said protrusion measured on the side of said inlet opening 8 of said channel 2 in a sliver condenser for a drawing device with a feeding device with a sliver clamp line extending at an angle to the flat side of the sliver; 2. Sliver capacitor according to claim 1, characterized in that the distance between the faces 6, 9 is greater than the maximum dimension of the outlet opening 3 of the passage 2.