JPS59100707A - Spinneret - Google Patents

Abstract

PURPOSE:A spinneret capable of carrying out stable spinning, having improved durability and corrosion resistance, obtained by providing a coating layer consisting of a Ti nitride layer or a layer contg. diffused Ti nitride to inner walls of spinning holes of the spinneret made of Ti or Ti alloy having a large number of very small spinning holes. CONSTITUTION:In the spinneret 2 made of Ti or Ti alloy having a large number of the very small (spinning holes 1, diameter is preferably 1-0.05mm.) the inner walls of the spinning holes 1 are provided with the film 3 consisting of a titanium nitride layer or diffused Ti layer, to give the desired spinneret 2. EFFECT:Hole diameters are constant independently of the thickness of the film 3 of the inner walls of the spinning holes 1, and the thickness of the film 3 is uniform throughout the whole length of the spinning holes 1, so that the hole diameters and length of the holes are constant and stable spinning is carried out.

Description

【発明の詳細な説明】 木発明は、紡糸口金に係り、特にチタン又はチタン合金
より成る紡糸口金の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to spinnerets, and more particularly to improvements in spinnerets made of titanium or titanium alloys.

従来より紡糸口金の材料としては、紡糸操業条件による
ところの要求として耐久性及び耐食性が必要とされ、そ
の上多数の微細な紡糸孔を穿設する為に加工容易性が必
要とされ、これを満すものとしてステンレス鋼、金−白
金合金、タンタル。Conventionally, materials for spinnerets have been required to have durability and corrosion resistance as required by spinning operating conditions, and also to be easy to process in order to drill a large number of fine spinning holes. Stainless steel, gold-platinum alloy, tantalum.

チタンなどが主として用いられてきた。Titanium has been mainly used.

これらの比較的軟質の材料より成る紡糸口金を使用する
と、短期間の内に紡糸孔が摩耗し、孔径及び孔長の精度
が低下し、或いは損（島して紡糸口金としての性能が低
下し、得られる糸の品質が悪化すると云う欠点があった
。If a spinneret made of these relatively soft materials is used, the spinneret will wear out over a short period of time, reducing the accuracy of the hole diameter and length, or causing loss (deterioration of the spinneret's performance as a spinneret). However, there was a drawback that the quality of the yarn obtained deteriorated.

これは紡糸原液が紡糸孔を経て紡出される際、非當に高
い圧力、流速を伴って通過する為であり、例えば酸化物
などの添加物を含有している場合や加熱昇温の状態にあ
る場合などは特に著しいものである。This is because when the spinning stock solution is spun through the spinning hole, it passes through the spinning hole with an unreasonably high pressure and flow rate. In some cases, this is particularly significant.

このようなことから近年被覆技術の応用として物理的或
いは化学的手法により紡糸口金板に硬質膜を付し、紡糸
孔の耐摩耗性を向上させる方法が種々提案されている。For this reason, various methods have been proposed in recent years as an application of coating technology to improve the abrasion resistance of the spinning hole by applying a hard film to the spinneret plate by physical or chemical methods.

しかし、このような被覆技術により得られた紡糸口金に
は次のような種々の問題点があって、安定性に欠け、実
用化が困難である。However, the spinnerets obtained by such coating techniques have the following various problems, lack stability, and are difficult to put into practical use.

（１）紡糸孔の出口部に被）漢が集中し、かえり状に突
出し、特に厚い被膜を形成した場合には顕著となる。(1) The fibers concentrate at the outlet of the spinning hole and protrude like burrs, which is particularly noticeable when a thick film is formed.

（２）　　紡糸孔の上部は被膜があるが下部には殆んど
無く、従って紡糸孔の形状が逆テーパー状となり、孔径
及び孔長が安定しない。(2) There is a coating on the upper part of the spinning hole, but there is almost no coating on the lower part, so the shape of the spinning hole becomes inversely tapered, and the hole diameter and length are unstable.

（３）厚い被膜を形成した場合、孔径が極端に小さくな
り、また孔径の管理がゲＩｔＬい。(3) When a thick coating is formed, the pore diameter becomes extremely small and the pore diameter management becomes difficult.

（４）厚い被膜を形成した場合、′＋１．膜邪に応力割
れが発生し、被膜部が剥離する。(4) When a thick film is formed, '+1. Stress cracks occur in the membrane, causing the coating to peel off.

本発明はこのような問題点を解決すべくなされたもので
あり、多数の微細な紡糸孔の内壁に硬質の厚い被膜が均
一に形成された紡糸口金を提供せんとするものである。The present invention has been made to solve these problems, and it is an object of the present invention to provide a spinneret in which a thick hard coating is uniformly formed on the inner walls of a large number of fine spinning holes.

本発明の紡糸口金は、図面に示す如く多数の微細な紡糸
孔１を有するチタン又はチタン合金より成る紡糸ＬＩ金
２に於いて、前記紡糸孔１の内壁に窒化チタン層又は窒
化チタンの拡１１に層がら成る被膜３が設げられている
ことを特徴とするものである。As shown in the drawings, the spinneret of the present invention has a spinning LI gold 2 made of titanium or titanium alloy having a large number of fine spinning holes 1, and a titanium nitride layer or a titanium nitride expansion layer 11 on the inner wall of the spinning hole 1. It is characterized in that a coating 3 consisting of layers is provided.

斯かる本発明の紡糸口金の微細な紡糸孔１の孔径は、一
般にｌ　ｙｍ〜０．０５龍であり、それ以下の特殊な場
合もあるが、いずれの場合もガス窒化法により紡糸孔ｌ
の内壁に窒化チタン層又は窒化チタンの拡散層の被膜３
が形成されるものである。The diameter of the fine spinning holes 1 of the spinneret of the present invention is generally from ym to 0.05 mm, and there are special cases where the diameter is smaller than that, but in any case, the diameter of the spinning holes 1 is formed by the gas nitriding method.
coating 3 of a titanium nitride layer or a titanium nitride diffusion layer on the inner wall of the
is formed.

このように紡糸孔１の内壁に窒化チタン層又は窒化チタ
ンの拡散層の被膜３を設けた本発明の紡糸口金は、その
紡糸孔１の内壁の被膜３の厚さに関り無く孔径は一定し
ており、また紡糸孔１の孔径が小さくとも前記の被膜３
の厚さは紡糸孔１の全長にわたって均一となる。従って
多数の紡糸孔１の孔径及び孔の長さが一定し安定した紡
糸ができる。また紡糸孔１の出口部に従来の紡糸口金の
ように被膜のかえり状の突出部が形成されることが無い
。さらに窒化チタン層又は窒化チタンの拡散層の被膜３
ば、滑りが良く、しかも硬質で耐摩耗性に優れているの
で、紡糸時の糸離れが良好であり、孔径も変化すること
が無く、糸の太さにむらが生しることが無い。さらにま
た前記被膜３は耐久性、耐食性に優れているので、紡糸
操業条件の変化に対応できる等の優れた効果がある。In the spinneret of the present invention in which the coating 3 of the titanium nitride layer or the titanium nitride diffusion layer is provided on the inner wall of the spinning hole 1, the hole diameter is constant regardless of the thickness of the coating 3 on the inner wall of the spinning hole 1. Moreover, even if the diameter of the spinning hole 1 is small, the coating 3
The thickness is uniform over the entire length of the spinning hole 1. Therefore, the diameter and length of the numerous spinning holes 1 are constant, allowing stable spinning. Further, unlike conventional spinnerets, a burr-like protrusion of the coating is not formed at the outlet of the spinning hole 1. Further, a titanium nitride layer or a titanium nitride diffusion layer coating 3
For example, it is slippery, hard, and has excellent abrasion resistance, so the yarn separation during spinning is good, the pore diameter does not change, and there is no unevenness in the thickness of the yarn. Furthermore, since the coating 3 has excellent durability and corrosion resistance, it has excellent effects such as being able to respond to changes in spinning operating conditions.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明の紡糸口金の一部縦断面図である。 １−−−−一紡糸孔、２−−一一−−紡糸口金、３−−
−−−一被膜。 出願人　　田中貴金属工業株式会社 ／The figure is a partial longitudinal sectional view of the spinneret of the present invention. 1----1 spinning hole, 2--11--spinneret, 3--
---One coat. Applicant Tanaka Kikinzoku Kogyo Co., Ltd./

Claims (1)

【特許請求の範囲】[Claims] 多数の微細な紡糸孔を有するチタン又はチタン合金より
成る紡糸口金に於いて、前記紡糸孔の内壁に窒化チタン
層又は窒化チタンの拡散層から成る被膜が設けられてい
ることを特徴とする紡糸口金。A spinneret made of titanium or a titanium alloy having a large number of fine spinning holes, characterized in that the inner wall of the spinning hole is provided with a coating consisting of a titanium nitride layer or a titanium nitride diffusion layer. .