JPH0121241B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a spinneret for irregularly shaped yarn.

Conventional spinnerets for irregularly shaped yarn have a stock solution discharge hole having a cross-sectional shape similar to or the same as the cross-sectional shape of the irregularly shaped thread to be obtained, which is bored through the bottom of the stock solution introduction hole.

However, as shown in FIGS. 1a and 1b, the irregularly shaped yarn obtained from the conventional spinneret 2, 2' having irregularly shaped discharge holes 1, 1' is an irregularly shaped yarn with few rounded edge portions.

This is due to the fact that the stock solution wets and spreads on the outlet of the discharge hole, that is, the spinning surface, that the stock solution itself becomes rounded due to the unique property of liquids that reduces the surface area the moment it leaves the discharge hole, and that This is thought to be due to the loss of stability of the thread shape due to wear of the hole, especially near the exit part.

The present invention has been made to solve such problems, and aims to provide a spinneret for spinning irregularly shaped yarns that can stably obtain irregularly shaped yarns with a less rounded cross-sectional shape.

The spinneret for irregularly shaped yarn of the present invention has a spinneret plate having a large number of equally spaced through holes, the tips of which protrude in an irregular shape, and at least one circular dope discharge hole provided inside. The chip is fixed through the chip.

Hereinafter, an embodiment of the spinneret for irregularly shaped yarn according to the present invention will be described with reference to the drawings. The spinneret 3 for spinning irregularly shaped yarn shown in FIG. are arranged in a staggered manner at equal intervals, and into the through holes 6 are undiluted solution discharging tips 7 made of carbide whose tips protrude in an equilaterally triangular cross section as shown in FIG.
is penetrated and fixed, and the upper half of the through hole 6 is the stock solution introduction hole 8.
A single circular stock solution discharge hole 9 is bored in the center of the stock solution discharge cap 7.

The spinneret 3' for spinning irregularly shaped yarn shown in FIG. 4 has through-holes 6' having a circular cross section and a stepped portion 5' in the middle arranged in a staggered manner at equal intervals in a spinneret plate 4. As shown in FIG. 5, a stock solution discharging tip 7' made of cemented carbide whose tip protrudes into a T-shaped cross section is fixed through the hole 6', and the upper half of the through hole 6' becomes a stock solution introduction hole 8'. Five circular stock solution discharge holes 9' are bored in a T-shaped arrangement throughout 7'.

The spinneret 3, 3' for spinning irregularly shaped yarn shown in FIGS.
The stock solution introduced into the stock solution discharge holes 9 and 9' is discharged from the stock solution discharge holes 9 and 9', and at this time, the stock solution wets and spreads over the entire protruding tip surfaces of the stock solution discharge tips 7 and 7', and is transferred to the irregularly shaped yarn spinneret 3 in FIG. In this case, an irregularly shaped yarn having a regular triangular cross section is spun, and in the case of the irregularly shaped yarn spinneret 3' of FIG. 4, an irregularly shaped yarn having a T-shaped cross section is spun. When the stock solution discharge tips 7 and 7' are made of cemented carbide as in the above embodiment, the wear of the stock solution discharge holes 7 and 7' is small, and the cross-sectional shape and thickness of the thread are not large even after long-term use. It is something that does not change.

As can be seen from the above description, the irregularly shaped yarn spinneret of the present invention has a dope solution formed by a circular through-hole formed in the spinneret plate, the tip of which protrudes in an irregular shape, and a circular dope discharge hole bored inside. Since it is made by penetrating and fixing the spinning tip, even if the discharged stock solution wets and spreads over the entire irregularly shaped discharge surface, it does not spread any further, making it possible to obtain irregularly shaped yarn with an extremely stable shape. can.

Furthermore, when the stock solution discharge tip of the irregularly shaped yarn spinning spinneret of the present invention is made of cemented carbide, the stock solution discharge hole suffers less wear, so the cross-sectional shape and thickness of the yarn do not change much even after long-term use. , it has the advantage of being able to maintain a certain level of quality.

[Brief explanation of drawings]

Figures 1a and b are depressed views showing the stock solution discharge hole of a conventional spinneret, Figure 2 is a cross-sectional view of essential parts showing an embodiment of the spinneret for irregularly shaped yarn according to the present invention, and Figure 3 is its irregular shape. FIG. 4 is a sectional view of essential parts showing another embodiment of the spinneret for irregularly shaped yarn according to the present invention, and FIG. FIG. 3 is a perspective view of a stock solution discharge chip. 3, 3'... Spinneret for irregularly shaped yarn, 4... Spinneret plate, 5... Taper, 5'... Step portion, 6, 6'...
Through hole, 7, 7'... Stock solution discharge tip, 8, 8'...
Stock solution introduction hole, 9, 9'... stock solution discharge hole.

Claims (1)

[Claims] 1. Irregularly shaped yarn made by fixing a dope spinning tip, which has an irregularly protruding tip and at least one circular dope discharge hole inside, into a large number of equally spaced through holes drilled in a spinneret plate. Spinneret.