JPH0772371B2 - Top clothing - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a structure of a top garment used for cotton and synthetic fibers.

Conventional technology and its problems In recent years, the carding machine has been remarkably speeded up and has high productivity, the amount of fiber passing per unit time is large, and the cylinder top is the main part of the carding process. In order to improve the ability to open the wire, metallic wires have been developed that set the working angle, the number of needle heads that do not cause clogging of seed residue and leaf residue.

However, in the conventional top clothing which corresponds to the strong opening force of the cylinder wire, the cross section of the clothing wire is flat or oval, and the front and rear ends in the carding action direction are formed with a large radius of curvature. Therefore, even if the number of needle heads is increased, the fibers on the small fibers to be combed are not sufficiently supplemented at the tips of the needle tips, and many small fiber masses pass without being sufficiently subjected to the combing action. Is the cause of the occurrence of.

Further, in order to improve the above-mentioned drawbacks and obtain a top clothing having excellent opening ability, for example, as shown in Japanese Patent Publication No. 54-26610, the cross-sectional shape of the clothing line is changed to the tip of the needle, the rear of It has been proposed to form an acute-angled portion at an end with a radius of curvature R of 0.1 to 0.01 mm, and to form four surfaces with rhombic lines formed with a flat surface or a concave surface. The top clothing that has needle-shaped wires of such a rhombic cross section has a larger gripping force of fibers than conventional round wires and track wires, and when the fibers are subjected to a combing action, they can be sufficiently stretched and separated. It was possible.

However, when the lobe wire having the rhombic cross section is planted on the base cloth, as shown in FIG. 5, the opposite corners at both ends in the minor axis direction of the lobe diamond cross section are sharpened. For this reason, since the corners of the needle-laid wire that are implanted are in contact with the back surface 11 of the base cloth at a right angle, the sitting of the needle becomes unstable. for that reason,
Starting needle. Since the needles are apt to be disturbed and the performance of the top clothing is significantly deteriorated, there is a problem that it cannot be used and its life is shortened.

The present invention is to solve the above problems, the cross-sectional shape of the clothing line that affects the performance of the top clothing, taking the advantages of the conventional ellipse and rhombus, further openability and dust removal ability It is intended to provide an improved top clothing.

Means for Solving the Problems According to the present invention, the radius of curvature R ₁ of the front end and the rear end in the action (long axis) direction of the needle is set to 0.03 to 0.10 mm. The optimum curvature for the spinning of the compound fiber, and the radius of curvature R ₂ of the opposite corners at both ends in the minor axis direction is 0.08 to 0.12 mm R ₁ <R ₂ There is a relationship of the above radius R A needle wire having a rhombic and elliptical composite cross-sectional shape in which the four faces connecting the ends of ₁ and R ₂ are connected with a curve R ₃ having an outward bulge is planted on an elastic base cloth having an elastic rubber sheet as a base layer. This stabilizes the seating of the needle against the base fabric, improves the strength of the needle, and further increases the needle tip hardness of the needle tip to 760 to 900 Hv, and minimizes the change in the needle head area even with the use of a needle. By adopting the shape, the conventional problems have been solved.

By the way, the needle point of the above-mentioned needle laying wire is formed in a sharp state in which the thickness in the minor axis direction at the tip in the needle working direction is made as small as possible by side surface polishing or the like.

Action Since it has a needle cross-sectional shape that is the most stable on the base cloth when the top bar is clipped, it is the starting needle. Rough needles and the resulting needle roughness (uneven needle height) are less likely to occur. Further, by making the radius of curvature of the front end and the rear end in the direction of the major axis (action) of the needle as small as possible, gripping of the fiber is ensured and opening and dust removal efficiency are improved. In addition, since it has a sharp needle tip with the thickness in the minor axis direction at the tip in the needle acting direction made as small as possible, it suppresses changes in the needle head area due to the abrasive needle as much as possible, and exhibits stable open performance for a long time. . Furthermore, in combination with the use of an elastic base cloth with an elastic rubber sheet inserted in the base layer, it becomes possible to obtain the optimum pin action for carding,
There is no need to raise a needle.

Embodiment One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the cross-sectional shape of the needle laying wire used in the present invention, wherein the radius of curvature R ₁ of the tip and the rear end of the needle laying wire in the action (long axis) direction W of the needle is 0.03 mm to 0.10 mm, for example 0.07 mm. mm, and the radius of curvature R ₂ of the opposite corners at both ends in the minor axis direction D is 0.
08 to 0.12 mm, for example 0.1 mm, and the above radii of curvature R ₁ and R ₂ are R
₁ <R ₂ , and a combination of a rhombus and an ellipse formed by connecting four sides connecting the ends of the above-mentioned radiuses of curvature R ₁ and R ₂ with a curve R ₃ having a bulge outward and having a radius of curvature of 0.2 mm to 0.50 mm. It is formed into a needle wire having a sectional shape as combined. The respective dimensions in the major axis direction W and the minor axis direction D are, for example, 0.41 mm and 0.29 mm.

By the way, when spinning synthetic fiber, when dust removal is not required like cotton fiber, when spinning fine denier fiber, because fiber damage occurs, the radius of curvature R ₁ is within that range. The upper limit of 0.10mm, for example, exceeding 0.07mm (however, R ₁
Setting <R ₂ ) is good.

The above wire is bent into a U shape, and natural or styrene butadiene rubber (SBR), acrylonitrile butadiene rubber (NBR), ethylene propylene rubber (EPR), chloroprene rubber (CR) are applied to the surface layer (1) as shown in FIG. , A synthetic rubber sheet such as urethane rubber (U) or a foam sheet thereof, and a base layer (2) with a cotton cloth (3) and a synthetic fiber woven cloth (4) (for example, high tensile strength, high modulus polyester, aramid, vironin, A plurality of woven fabrics having at least warp yarns selected from benzoate, 6.6 nylon and the like, and an elastic rubber sheet (5) between them (for example, natural rubber,
Synthetic rubber or the like) is inserted, and each layer is integrally laminated and adhered via a natural or synthetic rubber adhesive to form a base cloth for needle cloth. The number of points is 300 to
650P / 25.4mm ² , working angle X ° = 75 ° (72 ° ~ 78 °), implantation angle Y ° = 75 ° (72 ° -80 °), needle height A = 8 to 11.0mm
For example, the needle is set to 9.0 mm, and the needle (6) is bent into a dogleg shape to form the top clothing of the present invention having a waist upper dimension B = 3.0 to 6.0 mm, for example 4.0 mm.

Further, as shown in FIGS. 2 and 3, the tip (7) of the dogleg-shaped needle.
Has a needle shape (8), is side-polished (9), and has a needle tip diameter P of 0.10-
The tip is sharp and sharp with 0.20 mm, and the hardness of the tip is increased to 760 to 900 Hv by heat treatment, and the softening point is located as much as possible from the tip of the needle above the waist (10) to about 2 to 5 mm.
It was set to a position between them and brought close to the needle tip.

Incidentally, as the needle implantation tissue, a known conventional tissue other than 10T × 4L can be used, and the needle height, the above waist dimension, the working angle and the implantation angle, etc. may be appropriately changed as necessary.

Also, set the radius of curvature R ₁ of the tip and the rear end in the needle action direction to 0.
If the length is less than 03 mm, the fibers are pointed at the tip of the combing action, causing a large bending stress on the fibers, and residual stress remains even when the fibers become sliver after passing through the card.
The fibers are not preferable because they are curled, and further, the bending stress causes a tensile force of carding action to cause fiber breakage. Moreover, when the radius of curvature R ₁ exceeds 0.10 mm, the speed is high when spinning cotton fibers. Under high production, the supplement of fibers on the small lumps at the tip of the needle tip is insufficient, and many small fiber lumps pass through without receiving the carding action sufficiently, which is a cause of nep occurrence, which is not preferable. .

Further, the radius of curvature R ₂ of the opposite corners of both ends in the minor axis direction of the needle is 0.08 to 0.12 mm, and by connecting the four surfaces connecting R ₁ and R ₂ with a curve R ₃ having a bulge on the outside, The top bar is set so that it fits best into the base cloth when clipping and is stable, and that the stapling due to rattling does not easily occur.

By the way, when the top clothing A according to the present invention and the top clothing B, C, D of the conventional round wire, track line, and rhombus wire were used to measure the number of neps and the amount of cotton yarn, FIG. a)
The result as shown in (b) was obtained.

As is clear from these results, the top clothing of the present invention was able to reduce both the number of nep and the amount of cotton yarn as compared with the conventional top clothing.

EFFECTS OF THE INVENTION With the above configuration, the present invention sufficiently withstands a strong bending stress generated between the needle cloths of a carding machine, and holds and opens a fiber group that is combed in the action direction of the needle. Moreover, since the radius of curvature R ₁ is 0.03 to 0.10 mm, the fiber is not cut,
In addition, the instability of sitting on the base cloth, which is a drawback of the rhombus wire,
A curve R having opposite corners at both ends in the minor axis direction for improving strength and having a radius of curvature R ₂ larger than the above radius of curvature R ₁ and bulging outward on the four faces connecting R ₁ and R _{2. Since} it was formed in ₃ , the fibers that work with the metallic clothing on the cylinder with the tip gripped do not cause large bending stress,
The fiber is cut along the outer periphery of the smooth streamline, and no fiber cutting occurs. In addition, the U-shaped needle sits well on the base cloth and is stable, making it the starting needle. The wobbling that causes random needles is eliminated, and the needle is started. It is possible to prevent the shortening of the service life due to the cause of the needle contact accident and to extend the service life. Furthermore, in order to increase the elasticity of the needles, a cotton cloth and a plurality of synthetic fiber woven cloths with high tensile strength and high modulus are used for the base layer, and an elastic rubber sheet is used between them, so the base cloth for the needle cloth is used, which is ideal for carding. A pin action is obtained, and the occurrence of broken needles is eliminated.
In addition, the tip of the needle is kept sharp by side polishing, the hardness is increased by induction hardening only at the tip, and the change in needle diameter is suppressed as much as possible even with a needle, so it shows stable open performance over a long period of time. It is an invention having an excellent effect such as

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view showing the clothing line of the top clothing of the present invention, FIG. 2 is a partially enlarged cross-sectional view showing an embodiment of the top clothing of the present invention, and FIG. 3 is the needle tip portion. A partial enlarged view of (a)
Is a front view, (b) is a side view, and FIG. 4 shows a result of an experiment using the top clothing of the present invention and a conventional top clothing.
(A) is a comparative explanatory view of the number of neps, (b) is a comparative explanatory view of the amount of cotton yarn, and FIG. 5 is a partially enlarged cross-sectional view showing a needle implantation state of a conventional top clothing. (1) ... surface layer, (2) base layer, (3) ... cotton cloth, (4)
...... Synthetic fiber woven cloth, (5) elastic rubber sheet, (6) ……
Needle, (7) ... Tip, (8) ... Needle-shaped, (9) ...
… Side polishing, (10) …… waist, (11) …… reverse side of fabric, (1
2) …… Rhombus stitching wire.

Claims (2)

[Claims] 1. The radius of curvature R ₁ of the tip and the rear end in the action (long axis) direction of the needle is 0.03 to 0.10 mm, and the radius of curvature R ₂ of opposite corners of both ends in the short axis direction is 0.08 to 0.12 mm, and the relationship between the radius of curvature R ₁ and the radius of curvature R ₂ is R ₁ <R ₂ and the four faces connecting the ends of the above radiuses of curvature R ₁ and R ₂ are curved with an outward bulge. Needle wire formed in a composite cross-sectional shape of connected diamonds and ellipses is planted on the base cloth for needle cloth, the tip of the needle is side-polished to form a needle shape, and the hardness of the tip is 760 to 900 Hv. Top clothing that is characterized by 2. The top according to claim 1, wherein the base layer of the base cloth for the needle cloth is formed of a laminate of a plurality of cotton cloths and synthetic fiber woven cloths and an elastic rubber sheet inserted therebetween. Clothing.