JPS6120043Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a squeezing roller used in a wet spinning process to control the moisture content of a fiber bundle.

Conventionally, in wet spinning, in order to perform stable spinning without yarn breakage, it is necessary to keep the moisture content of the wet fiber bundle in the draft zone constant to prevent fluctuations. It has been known.
However, methods for keeping this moisture content constant include a method of supplying water to the surface of the bag crawler in the draft zone, a method of supplying water directly to the fiber bundle in the draft zone, or a method of providing a guide in the draft zone and watering from the guide. There are known methods to supply water, but because the amount of water supplied fluctuates and the state of moisture adhesion to the fiber bundle changes, it is difficult to maintain the moisture content of the wet fiber bundle in the draft zone at a constant level. It is difficult to do this, and as a result, troubles such as thread breakage occur frequently.

The object of the present invention is to provide a squeezing roller that solves the above problems.

That is, the present invention has a circumferential groove in the center of the roller circumferential surface in a direction perpendicular to the roller rotation axis, and diagonal grooves extending from the groove to both end surfaces on both sides of the groove and obliquely intersecting the groove. This is a squeezing roller for spinning.

The configuration of the present invention will be explained in detail below. 1st
The figure is an elevational view showing an example of the squeezing roller according to the present invention. It has a circumferential groove 3 in the direction, and on both sides of the groove 3, from the groove 3 to both end surfaces of the roller R,
It has an oblique groove 4 having a certain angle θ with respect to the groove 3. The number of circumferential grooves 3 and diagonal grooves 4 is plural in the example shown in FIG. 1, but one or more may be selected as necessary. The number or total radius c of the circumferential grooves 3, the depth and pitch a of the grooves 3, the depth and pitch b of the oblique grooves 4, and the angle θ are determined depending on the type, thickness, and holding of the fiber bundle to be used. It can be determined experimentally based on a predetermined moisture content, etc.

The adjustment effect of the moisture content of the fiber bundle by the squeezing roller R of the present invention is performed by the circumferential groove 3 and the diagonal groove 4, but the circumferential groove 3 is mainly controlled by the depth of the groove, the size of the pitch a, and the number of grooves. The amount of water squeezed out of the fiber bundle is controlled by the diagonal groove 4, and the groove depth and pitch b are
The amount of squeezing is controlled by the size of the groove, the angle θ, and the number of grooves, and the squeezed water is transferred to the diagonal groove 4.
through the circumferential groove 3. The moisture content of the fiber bundle can be maintained at an excess moisture content until just before it is finally squeezed, and the excess moisture is finally squeezed mainly through the control of the circumferential groove 3, so that the predetermined moisture content can be easily achieved. It can be done.

FIG. 2 is a side view of a simplified process of wet spinning using a squeezing roller according to the present invention. After pre-drafting the fiber bundle Y with the back rollers R ₁ , R ₁ ′ and the front rollers R ₂ , R ₂ ′ in the pre-draft zone P,
Water is supplied to the fiber bundle Y from a swirl water supply nozzle K and a vertical water supply jet nozzle H, and then the fiber bundle Y is passed through a pair of rollers, the top roller being a rubber roller _R3 and the bottom roller being a squeezing roller R according to the present invention. After bringing _{the moisture} content _of the fiber _bundle Y to a predetermined moisture content by passing it between Next, the yarn is false-twisted using a false-twisting nozzle S, and pulled out using pull-out rollers R ₆ and R ₆ ' to spin out yarn Y'. In this wet spinning process, extremely smooth drafting was possible without causing troubles such as yarn breakage.

As described above, by using the squeezing roller according to the present invention in the wet spinning process, it is possible to easily stabilize the moisture content of the fiber bundle at a predetermined moisture content in the main draft zone, and as a result, faster speeds can be achieved. This made it possible to achieve stable wet spinning.

Next, examples will be presented in which the squeezing roller according to the present invention is used in a wet spinning process.

Example 1.4 denier was used in the wet spinning process shown in Figure 2.
32mm hot water soluble polyvinyl alcohol fiber 10%
A sliver (300 gel/6 yards) blended with 90% cotton fiber is supplied, and after being pre-drafted 5 times in the pre-draft zone P, the sliver is fed with a swirl water supply nozzle K and a vertical water supply jet nozzle H.
Both are supplied with water at a water pressure of 1.2 kg/cm ² , and then the sliver is passed through the squeezing roller R (a=
1mm, C = 10mm, b = 1mm, θ = 45°) as the bottom roller and a rubber roller _R3 with a hardness of 90° as the top roller. After passing it between a pair of rollers, it is drafted 24 times in the main draft zone M. Steam pressure 2.2Kg/cm ² and 135℃ using false twisting nozzle S.
_{False twist} with
It was pulled out at 400 m/mim to spin out a 20S yarn, dried in a drying drum (not shown) at 220°C, and then wound into cheese. In this case, the spinning quality was extremely good.

[Brief explanation of the drawing]

FIG. 1 is an elevational view showing an example of a squeezing roller according to the present invention, and FIG. 2 is a side view showing a simplified process of wet spinning using the squeezing roller according to the present invention. R... Squeezing roller according to the present invention, 1... Circumferential surface of R, 2, 2'... Rotating shaft of R, 3... Circumferential groove of R, a... Pitch of 3, C... 3 Full width, 4...
Diagonal groove of R, pitch of b...4, angle of θ...4,
Y...sliver, Y'...yarn, P...pre-draft zone, M...main draft zone.

Claims (1)

[Scope of utility model registration request] A squeezing roller for wet spinning, which has a circumferential groove in the center of the roller circumferential surface in a direction perpendicular to the roller rotation axis, and has oblique grooves on both sides of the groove that extend obliquely from the groove to both end faces and intersect the groove. .