JPH0612482U - Ceramic snail guide - Google Patents

Abstract

(57) [Summary] [Structure] In a snail guide having a linear base portion, a circular arc portion continuous with the linear base portion, and a linear distal end portion, and a thread guide hole for guiding the yarn in the circular arc portion, the yarn is The shape of the yarn guide hole when viewed from the horizontal direction in which the ratio of the short diameter to the long diameter is 0.
It is an ellipse or a circle in the range of 4 to 1.0. [Effect] Even when a small yarn guide hole is required, the yarn does not intersect at two points where the height of the arc guide yarn guide hole is different, and the twisting is improved, and yarn breakage and fluffing occur. It is possible to produce high quality yarn by reducing damage to the yarn such as.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ceramic snail guide used for guiding a yarn in a process of spinning and twisting cotton and chemical fibers.

[0002]

[Prior art]

 As shown in FIG. 2, a conventional ceramic snail guide (hereinafter abbreviated as snail guide) is composed of a linear base portion 11, an arc portion 12 that is continuous with the base portion 11, and a linear tip portion 13. The yarn guide hole 14 for guiding the yarn was formed. This snail guide was manufactured by winding an extrusion-molded rod around a rod having a circular cross section having a spiral shape with a predetermined pitch and rotating it once (see Japanese Utility Model Publication No. 50-101609).

Therefore, when viewed from the direction of the spiral, that is, the direction in which the forming rod was located, the yarn introducing hole 14 looks like a circle, as shown in FIG. However, when viewed from the horizontal direction in which the yarn S travels (hereinafter, abbreviated as the horizontal direction), as shown in FIG. 2B, the yarn guide hole 14 has a short radius portion parallel to the axis of the base 11. The diameter is such that the ratio of the minor axis to the major axis (hereinafter, abbreviated as R value) is in the range of 0.1 to 0.2 and looks like an ellipse. Further, when the snail guide is viewed from the upper surface on the extension line of the axis of the base 11, it has a V shape as shown in FIG.

[0004]

[Problems to be solved by the device]

 By the way, if the size of the yarn introducing hole 14 is made considerably larger than the yarn S, the runout of the yarn S passing at a high speed becomes large, and it becomes difficult to manufacture a high quality yarn S. The thread hole 14 could not be enlarged.

Therefore, in the conventional snail guide, as shown in FIG. 2D, when the yarn S actually travels, the height of the portion of the circular arc portion 12 forming the yarn guide hole 14 is different. There is a problem in that the slidable contact occurs at the points, and it is easy to give damage to the yarn S such as yarn breakage or fuzzing.

Further, as shown in FIGS. 3 (a) and 3 (b), if the base 11 and a part of the tip 13 are bent, the shape of the yarn introducing hole 14 as viewed in the horizontal direction becomes substantially circular. However, when manufacturing by injection molding, the shape is complicated when the molded product is taken out of the mold, and some parts cannot be removed, so it is impossible to manufacture.

[0007]

[Means for Solving the Problems]

 In view of the above, the present invention is that in the snail guide, the shape of the yarn guiding hole as viewed in the horizontal direction is an ellipse or a circle having an R value in the range of 0.4 to 1.0.

[0008]

[Action]

 According to the present invention, the shape of the yarn guide hole seen from the horizontal direction is an ellipse or a circle having an R value in the range of 0.4 to 1.0. The two parts of the yarn guide hole having different heights do not come into sliding contact with each other, and the damage to the yarn such as yarn breakage or fluffing is reduced.

[0009]

【Example】

 Embodiments of the present invention will be described below.

As shown in FIG. 1 (a), the snail guide of the present invention comprises a linear base portion 1, a circular arc portion 2 and a linear distal end portion 3 which are continuous with the linear base portion 1, and the circular arc portion 2 forms a thread S. A yarn guide hole 4 for guiding is formed. Further, the shape of the yarn guiding hole 4 when viewed from the horizontal direction is an ellipse or a circle with an R value in the range of 0.4 to 1.0, and when viewed from the upper surface on the extension line of the axis of the base portion 1, FIG. ), It has a U-shaped rounded shape. As a result, as shown in FIG. 1C, when the yarn S actually travels, the yarn S does not come into sliding contact at two points where the height of the yarn guide hole 4 of the arc portion 2 is different, Since the vehicle travels without changing the height, it is possible to reduce damage to the yarn S. Further, since the axes of the base portion 1 and the tip portion 3 are deviated from each other, the thread S can be easily hung.

Such a snail guide of the present invention is manufactured by injection molding in which a raw material is injected into a mold while being heated and cured, and then removed from the mold. The mold at that time is a mold for molding a straight line portion which is the base portion 1 and a part of the circular arc portion 2, a die for molding a straight line portion which is the tip portion 3 and a part of the circular arc portion 2, and the circular arc portion 2. It is manufactured by dividing the mold into a semi-circular mold, which is a part, and combining these molds during molding. Here, since the shape of the yarn guiding hole 4 is determined only by the semi-circular shape, the shape of the yarn guiding hole 4 viewed from the horizontal direction is an ellipse or an R value in the range of 0.4 to 1.0. In order to obtain a circular shape, the shape of a mold for forming a semi-ring shape may be prepared.

As another manufacturing method, a cross section before or after firing is applied to a conventional snail guide in which the shape of the yarn introducing hole 14 is an ellipse having an R value in the range of 0.1 to 0.2. By cutting or grinding from the horizontal direction with an elliptical or circular drill, the shape of the yarn introducing hole 14 seen from the horizontal direction is made into an ellipse or a circle with an R value of 0.4 to 1.0. be able to. Since the shape of the yarn introducing hole 14 is determined only by the shape of the cross section of the drill, the shape of this cross section may be adjusted.

Further, as another manufacturing method, in extrusion molding in which a raw material is extruded from a predetermined mold to produce a rod-shaped shape, the extruded rod-shaped one has an elliptical cross section having a spiral shape with a predetermined pitch. By wrapping the forming rod 1 with one revolution, the shape of the yarn introducing hole 4 as viewed in the horizontal direction can be an ellipse or a circle having an R value of 0.4 to 1.0. Here, since the shape of the yarn introducing hole 4 is determined only by the shape of the elliptical cross section, the shape of the cross section of the rod may be adjusted.

The snorre guide of the present invention may be either cermet or cermet containing aluminum, titania, silicon carbide, silicon nitride, or zirconia as a main component, which can sufficiently withstand abrasion with the yarn S. The surface roughness is preferably a smooth surface of 4S or less, and more preferably 2 to 4S.

In the embodiment shown in FIG. 1, the snail guide has a circular cross section and a uniform thickness, but the snail guide is not limited to such a shape. For example, the cross section may have an elliptical shape or a polygonal shape with rounded corners. The shape may be changed, or the thickness may be changed on the way.

Experimental Example An experiment was conducted to find the optimum range of the R value of the yarn introducing hole 4. However, even if the R value of the yarn introducing hole 4 changes, the area thereof does not change. Then, as shown in Table 1, those in which the R value of the yarn introducing hole 4 was variously changed were used for a long time, and the results were examined.

However, in a snail guide manufactured by injection molding or extrusion molding, there is a limit in forming a small yarn guide hole 4, so that the ratio of the wire diameter of the yarn S to the long diameter of the yarn guide hole 4 is 0. In most cases, it is 01 or less. Therefore, the ratio of the wire diameter of the yarn S to the major diameter of the yarn introducing hole 4 was set to 0.001, 0.005, and 0.01 for the experiment.

The experiment was conducted for 6 months under the conditions that the material of the snail guide had a surface roughness of 3S and a ceramic containing alumina as the main component, the material of the thread S was polyester, the operating speed was 100 m / min, and the tension was 20 g. After using for a long time, the damage of the thread S is examined, and the one without any damage can be used for a long time, and the one with the damage that appears a little in the latter half can be used for a long time. After several experiments, at least once. Those that could not be used for a long time were made difficult, and those that could not be used for a long time were made unusable for a long time. The results are shown in Table 1.

When the shape of the yarn introducing hole 4 is elliptical, the radius portion parallel to the axis of the base 1 may have a short diameter or a long diameter. It was a result.

[0020]

[Table 1]

Here, it can be seen from Table 1 that the ellipse having the R value of the yarn guide hole 14 which is the conventional snail guide in the range of 0.1 to 0.2 cannot be used for a long time. Further, it can be seen that if the R value of the yarn guide hole 4 is 0.4 or less, it cannot be used for a long time. On the other hand, when the R value of the yarn guide hole 4 is 0.6 or more, it can be seen that there is no problem in long-term use.

After all, if the R value of the yarn guide hole 4 was 0.4 or more, it was excellent for long-term use. And, the more preferable R value of the yarn introducing hole 4 is 0.6 or more.

In the above experimental example, only the material of the snail guide was made of ceramics containing alumina as a main component, but other materials were not so different.

[0024]

[Effect of device]

 As described above, according to the snail guide of the present invention, the shape of the thread guide hole when viewed in the horizontal direction is an ellipse or a circle having an R value in the range of 0.4 to 1.0. Even when a yarn hole is required, the yarn does not intersect at two points of the arc-shaped yarn guide hole where the height of the yarn guide hole is different, so good twisting is achieved, and yarn breakage or fluffing occurs. It is possible to provide a snail guide capable of producing high-quality yarn with less damage to the yarn.

[Brief description of drawings]

1A is a front view showing a snail guide of the present invention, FIG. 1B is a plan view, and FIG. 1C is a left side view showing a usage state.

2A is a view of a conventional snail guide as seen from the direction of the spiral, FIG. 2B is a front view, and FIG. 2C is a plan view.
(D) is a left side view showing a usage state.

FIG. 3A is a front view showing a conventional snail guide,
(B) is a left side view.

[Explanation of symbols]

 1, 11: Base part 2, 12: Arc part 3, 13: Tip part 4, 14: Yarn guide hole S: Yarn

Claims (1)

[Scope of utility model registration request] 1. A snail guide having a linear base portion, a circular arc portion continuous with the linear base portion, and a linear distal end portion, wherein a yarn guide hole for guiding the yarn is formed in the circular arc portion, in a horizontal direction in which the yarn travels. A ceramic snail guide characterized in that the shape of the yarn guiding hole as viewed from above is an ellipse or a circle having a ratio of the minor axis to the major axis of 0.4 to 1.0.