JPS5846115A - Spinneret for spinning yarn of modified-cross section - Google Patents

Abstract

PURPOSE:The titled spinneret, having tips for spinning a spinning solution having inner circular extrusion holes for the spinning solution and protruding tips of modified cross section passed through and fixed on the holes perforated in a spinneret plate, and capable of giving modified cross section yarns having a cross section of little roundness stably. CONSTITUTION:Many holes 6' having circular cross section and an intermediate stepped part 5' are perforated at a regular interval in a spinneret plate. Tips 7' for extruding a spinning solution having protruding tips of modified cross section, e.g. T shape, are passed through and fixed on the holes 6' having the upper half of an introductory port 8' for the spinning solution, and extrusion holes 9' for the spinning solution are perforated in all the extrusion tips 7' to give a modified cross section arrangement, e.g. T shape. The extrusion holes 7' constituted of a super hard alloy reduce the abrasion.

Description

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

The conventional spinneret for irregularly shaped yarn is one in which a stock solution discharge hole with a cross-sectional shape similar to or the same as the cross-sectional shape of the irregularly shaped thread to be obtained 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 2.21 having irregularly shaped discharge holes 1 and 1' was an irregularly shaped yarn with few rounded edges.

This is because the stock solution wets and spreads on the spun spinning surface at the outlet of the discharge hole, the donated liquid itself becomes rounded due to the unique property of liquids that reduces its surface area the moment it leaves the discharge hole, and This is thought to be due to the loss of stability of the thread shape due to wear of the irregularly shaped discharge hole, especially near the exit portion.

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. Holes are drilled in a staggered manner at intervals, and a stock solution discharging tip 7 made of carbide whose tip protrudes in an equilateral cross-sectional shape as shown in FIG. A stock solution introduction hole 8 is formed, and a single circular stock solution discharge hole 9 is bored in the center of the stock solution discharge chip 7.

i@4 The irregular shaped yarn spinning spinneret 31 shown in FIG.
The through holes 6/ with stepped portions 5I are arranged in a staggered manner at equal intervals in the middle and have a circular cross section, and the tips of the through holes 6' protrude in a T-shaped cross section as shown in Fig. 5. Consists of. The stock solution discharging tip 7I is penetrated and fixed so that the upper half of the through hole 6' becomes the stock solution introduction hole 8', and five circular stock solution discharging holes 9 are formed in a T-shaped arrangement throughout the stock solution discharging chip 7'. ' is perforated.

The thus constructed spinnerets 3, 3' for spinning irregularly shaped yarns shown in FIGS. 2 and 4 allow the stock solution introduced into the stock solution introduction hole 8° 8' during spinning to be discharged from the stock solution discharge hole 9.9'. At that time, the stock solution wets and spreads over the entire protruding tip surface of the stock solution discharging tip 7.
An irregularly shaped yarn having a regular triangular cross section is spun, and in 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 discharging tips 7 and 7' are made of cemented carbide as in the above embodiment, 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 i-shaped yarn spinneret of the present invention has a circular through hole formed in the spinneret plate, the tip of which protrudes in an irregular shape, and a circular stock solution discharge hole is bored inside. Since it is made by penetrating and fixing the stock solution spinning tip, even if the discharged stock solution wets and spreads over the entire irregularly shaped discharge surface, it will not spread any further, making it possible to obtain irregularly shaped yarn with an extremely stable shape. Can be done.

Furthermore, when the stock solution discharge tip tube of the irregularly shaped yarn spinning spinneret of the present invention is made of cemented carbide, there is less wear on the stock solution discharge hole, so the cross-sectional shape and thickness of the yarn will not change much even after long-term use. It is possible to maintain a certain level of quality.

It has the effect of

[Brief explanation of drawings]

Figures 1a and btj are top views showing the stock solution discharge hole of a conventional spinneret, the second is a sectional view of essential parts showing an embodiment of the spinneret for irregularly shaped yarn according to the present invention, and Figure 3 is a diagram showing the irregularly shaped yarn spinning. FIG. 4 is a sectional view of essential parts showing another embodiment of the spinneret for irregularly shaped yarn of the present invention, and FIG. 5 is a perspective view of the concentrate discharging tip in the spinneret for irregularly shaped yarn. It is a perspective view of a discharge tip. 3.3I... Spinneret for irregularly shaped yarn spinning, 4...
・Spinneret plate, 5...Taper, 5'-...Step, 6.6'...Through hole, 7.7'-...
Stock solution discharge chip, 8, 8'... Stock solution introduction hole, 9
．． 9'...Stock solution discharge hole.゛Applicant Tanaka Kikinzoku Kogyo Co., Ltd. Figure 1 (Q) Figure 1 (b)

Claims (1)

[Claims] A large number of through holes are drilled at equal intervals in the spinneret plate, and the tip is irregularly shaped (at least one protruding, circular stock solution discharge hole is provided inside, and the stock solution spinning tip is penetrated and fixed, resulting in an unusual shape). Spinneret for yarn spinning.