JPS5815509Y2 - Pin-type opening roller in open-end spinning machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pin-type opening roller for an open-end spinning machine. In particular, in order to perform an even opening action on the fiber density characteristics of the sliver that is being gripped and fed, This takes into account the density of the pin needle head.

As a form of an open-end spinning machine, as shown in FIG. The spread fibers are fed into the opening zone A, transferred from the transfer zone to the transport path 5, further fed into the high speed rotating spinning chamber 6, and the yarn formed here is passed through the yarn guide tube 7 and drawn out to the outside. There is something I did.

In this case, the presser 3 has a spring 8
Because it is pressed against the supply roller 2 side by the pressure of
As shown in FIG. 2, the cross-sectional shape of the sliver S that is fed out while being gripped between the supply roller 2 and the prefixer 3 is flat, and is close to both ends a, a of the sliver S in the axial direction of the supply roller 2. The fiber density is smaller in the central part O, and larger in the central part O.

The opening roller 4 is usually made of a metal wire wound around the circumferential surface at a constant pitch, so when the flat shape 7 and the liver S with different fiber densities are affected by the metallic wire, the opening action will be reduced. Spots appear on the skin.

That is, since the number of fibers is small at both ends a and a for a constant opening force, each fiber is subjected to an excessive opening action, which tends to cause damage and breakage of the fibers.

On the other hand, in the central part O of the sliver, since the number of fibers is large for a given opening force, the opening action on each fiber is insufficient, which tends to cause slabs and neps.

In addition, the metallic wire is required to be flexible in order to be wound around the opening roller 4, and as a result, there is a limit to the hardening of the tips of the teeth, and the sliver must be rotated at a higher speed in order to obtain a sufficient opening effect in the central portion O. If this happens, the metal wire tooth tips will wear out prematurely.

By the way, since the Tutalic wire has a drawback in terms of wear resistance, a pin-type opening roller 4 in which a high-hardness pin 9 is implanted on the circumferential surface has been developed in order to improve this problem. The inventors of the present invention paid attention to the fact that the pins 9 can be placed in any arbitrary arrangement, and by changing the needle head density of the pins 9 in the axial direction of the roller 4, the flat sliver S is evenly opened. It was made to have a fiber effect.

In the embodiment shown in FIG. 3, the pins 9 are planted at a coarse pitch for one round in both end regions I in the direction of the four axial centers of the opening roller, and are planted densely in the remaining central region II.

With this configuration, the sliver S gripped by the supply roller 2 and the presser 3 and made into a flat shape is made so that the pins 9 with a coarse pitch act on both ends aa with a small fiber density, so that the fibers are The fiber opening effect is fully demonstrated without damage or cutting, and the pins 9 with a close pitch act on the central part O where the fiber density is large, and a large fiber opening force is exerted, so the fiber can be opened sufficiently. Effects can be obtained.

In short, the density of the needle heads of the pins 9 is made coarse for both ends aa of the sliver S in order to weaken the opening force, and the needle head density is made dense for the central part O in order to strengthen the opening force.

In the embodiment shown in FIG. 4, the density of needle heads in the central region IIO of the opening roller 4 is made denser, and both end regions I with a coarse pitch are made up of several turns, and the central region of the sliver S having the highest fiber density is The opening force in O is increased to ensure the opening action, and it is effective for opening thick slivers.

Of course, the pins 9 may be implanted so that the needle head density gradually decreases from the central region II to both end regions (2) of the opening roller 4.

As described above, according to the pin-type opening roller according to the present invention,
Since the density of the needle head of the pin corresponds to the fiber density, the opening action is performed evenly over the gold mines of the sliver without damaging or cutting the fibers, and it is a pin-type opening roller that is capable of high hardness treatment. Therefore, there is an advantage that even if the spindle is rotated at a higher speed, the phenomenon of wear on the pins is less likely to occur, and as a result, an effective fiber opening effect can be achieved by the high-speed rotation, which can contribute to improving productivity.

[Brief explanation of the drawing]

Fig. 1 is a plan sectional view of an open-end spinning frame in which the opening roller of the present invention is adopted, Fig. 2 is a front sectional view showing the cross-sectional shape of the sliver in a gripped state, and Fig. 3 is a developed view showing the pin installed state. , FIG. 4 is a developed view of another embodiment. 2... Supply roller, 3... Presser, 4... Spreading roller, S... Sliver, ■... Both ends of the opening roller Part area, II...
... Central area of the opening roller.

Claims (1)

[Scope of utility model registration request] In an open-end spinning machine that performs a fiber opening action on a gripped sliver, pins with at least two types of needle head densities are implanted on the circumferential surface so that the central region is dense and the end regions are coarse in the axial direction. A pin-type opening roller that is characterized by the following: