JPS62104928A - Top card clothing - Google Patents

Abstract

PURPOSE:To improve opening property and dust removing ability, by making the cross sectional shape of card clothing needles affecting the performance of top card clothing into a form incorporating advantages of a conventional oval and rhomb. CONSTITUTION:The radius of curvature (R1) at both end parts in the major axis direction (working direction) in the cross section of needles is smaller than that (R2) at both end pars in the minor axis direction in the perpendicular direction and the four sides connecting the end parts of the radii of curvature (R1) and (R2) are formed into a composite cross-sectional shape of a rhomb and oval connected with curves having outward bulges. The radii of curvature (R1) and (R2) are preferably 0.03-0.10mm and 0.08-0.12mm respectively. The tips of the needles are in the form of needles having ground sides and the hardness of the tip parts is preferably 760-900Hv.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the construction of top clothing for use with cotton and synthetic fibers.

Conventional technology and its problems In recent years, carding machines have significantly increased speed and production, and the amount of fiber passing through per unit time has increased. In order to improve the opening power of the wire, metallic wires are being developed that have a working angle and a number of needles that do not cause clogging with seed and leaf debris.

However, in conventional top clothing that can handle the strong opening force of the cylinder wire, the cross section of the clothing wire is flat or oval, and the leading and trailing 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 small fibers being combed are not sufficiently captured at the tips of the needles, and many small fibers pass through without receiving sufficient combing action, resulting in the occurrence of neps. It is the cause.

In addition, in order to improve the above-mentioned drawbacks and obtain a top clothing with excellent fiber opening force, as shown in Japanese Patent Publication No. 54-26610, for example, the cross-sectional shape of the clothing wire is It has been proposed that the rear end is formed with a radius of curvature R of an acute angle t-(L l~0,01 g, and is formed of a rhombic line with four flat or concave surfaces. Clothing with such a rhombic cross section The top clothing with needles planted with wire has a greater grip on the fibers than conventional round wire or track wire, and when the fibers are subjected to the combing action, they can be sufficiently stretched and separated.

However, when this needlework wire with a diamond-shaped cross section is planted in the base fabric, as shown in FIG. Therefore, the corners of the needle-planted sewing wire are placed in contact with the back surface 11 of the base fabric at right angles, so that the needles are unstable. As a result, needles are easily raised and wires become loose, and the performance of the top clothing is significantly reduced, making it unusable and shortening its lifespan.

The present invention solves the above problems, and incorporates the advantages of the conventional oval and rhombic cross-sectional shapes of the clothing wire, which affect the performance of the top clothing, to further improve the opening property and dust removal ability. The purpose is to provide an improved top clothing.

Means for Solving the Problems The present invention is suitable for spinning cotton and synthetic fibers when the radius of curvature R1 of the leading and trailing ends in the action (long axis) direction of the needle is set to 0.03 to 0.10. The radius of curvature of the opposing corners at both ends in the short axis direction is Rg1<α08 to 0.12.
■R1 (Rg), the above radius of curvature R1,
If! By planting needles in an elastic base fabric having an elastic rubber sheet as a base layer, a cloth wire having a composite cross-sectional shape of a rhombus and an oval shape, whose four sides are connected by a curve R3 that bulges outward, is implanted into an elastic base fabric having an elastic rubber sheet as a base layer. It stabilizes the position of the needle, improves the strength of the needle, and further improves the hardness of the needle tip from 760 to 9.
The conventional problems were solved by increasing the 00HV and creating a shape that suppressed changes in the needle head area as much as possible even when the needle was polished.

By the way, the needle point of the above-mentioned clothing wire is sharpened by side polishing etc. to make the thickness in the short axis direction of the tip in the direction of needle action as small as possible. Since the cross-sectional shape of the needle is the most stable, needle raising, random needles, and roughness (uneven needle heights) of the needles (accompanied by C) are less likely to occur.

Furthermore, by making the radius of curvature of the tip and rear ends of the needle as small as possible in the long axis (action) direction, the grip of the fibers is completely ensured, and the efficiency of fiber opening and dust removal is improved. In addition, since it has a sharp needle tip with the short axis thickness as small as possible at the tip in the direction of needle action, changes in the needle head area due to abrasion are minimized and stable fiber opening performance is achieved over a long period of time. . Furthermore, in combination with the use of an elastic base fabric in which an elastic rubber sheet is inserted into the base layer, it becomes possible to obtain a binaxian that is optimal for carding, and needle raising does not occur.

EXAMPLE Hereinafter, one embodiment of the present invention will be described based on the drawings. Figure 1 shows the cross-sectional shape of the clothing wire used in the present invention, and shows the cross-sectional shape of the clothing wire in the action (long axis) direction W of the needle. The radius of curvature R1 of the leading and trailing ends is 0.03111 to 0.10, for example 0.
．． 071111, and the radius of curvature R2 of the opposing corners at both ends in the short axis direction is set to 0.08 to 0.12, for example, 0.1 mm, and the radius of curvature R and R2 are R1 (Rg
The relationship is as follows, and the radius of curvature with the bulge is 0.2 to 0.5, with the four sides connecting the ends of the radii of curvature R1 and R2 being on the outside.
The cloth wire is formed to have a cross-sectional shape that is a combination of a diamond shape and an oval shape connected by a curve R3 of 0 m. The dimensions in the major axis direction W and the minor axis direction are, for example, 0, 41
The height is 0.29 m.

By the way, when spinning synthetic fibers, dust removal properties are not required like cotton fibers, and when spinning fine denier fibers, fiber damage occurs, so the radius of curvature R1 is
exceeds the upper limit of the range, for example, 0.07 m and is within the range of 0.10 m (however, it is better to set it to R1 (Rg)).

The above clothing wire is bent into a U shape, and the surface layer (
1) natural or styrene butadiene rubber (SBR), acrylonitrile butadiene rubber (NBR), ethylene propylene rubber (BPR), chloroprene rubber (CR),
A synthetic rubber sheet such as urethane rubber (U) or a foam sheet thereof, and a base layer (2) consisting of a cotton cloth (3) and a synthetic fiber woven cloth (4) (e.g., high tensile strength, high modulus polyester, aramid, vinylon, benzony) ), 6.6 A woven fabric whose warp is at least a selected yarn such as nylon, and an elastic rubber sheath (5) (for example, natural rubber, synthetic rubber, etc.) is inserted between each layer, and natural or synthetic rubber is inserted between each layer. A base fabric for clothing is formed by laminating and adhering them together via a rubber adhesive. On this base fabric, the number of points is 300 to 650 with 1OTX4L needle structure, P/25.4■2, working angle X'
= 75° (72° to 78°), implantation angle Y' = 75° (
72° to 80°), needle height A=8 to ILO dew, e.g. 9.
The top clothing of the present invention is constructed by setting the needle to 0 rin, and bending the needle (6) into the shape of t-< to make the above-waist dimension B = 3.0 to aθ rin, for example 4.0 rin. .

Furthermore, as shown in the figure below, the tip (7) of the dogleg-shaped needle is shaped like a needle (8), and the side surface is ground 11 (9). Tip diameter P t 0
．． 10-0.20 III sharp needle tip,
Furthermore, the hardness of the needle tip at the tip is t-760~900H by heat treatment.
V and set the softening point at a position approximately 2 to 5 degrees above the tip of the needle above the waist (10) of the needle as much as possible,
I brought it closer to the tip of the needle.

In addition to the above-mentioned 10Tx4L, other known conventional structures can be used as the implanted needle structure, and the needle height, above-waist dimension, working angle, implantation angle, etc. may be changed as necessary.

Also, the radius of curvature Rl of the tip and rear part in the direction of action of the needle
t less than 0.03 m Nisrut, m m ;l! >E
s Because the tip of the fiber is sharp, it generates a large bending stress, and residual stress remains even after passing through the card and becomes a sliver. (This is undesirable because it causes problems such as fiber breakage due to the tensile force applied during carding. Also, if the radius of curvature R1 exceeds 0.10, it is difficult to use at high speeds and high production when spinning cotton fibers. This is undesirable because the small fibers are not sufficiently captured at the tip of the needle, and a large number of small fibers pass through without being sufficiently carded, which may cause nephrescence.

In addition, the radius of curvature R2￥-t of the opposing corners of both sides in the short axis direction of the needle is set to 0.08 to 0.12 mII, and R
1゜R2 A curve R3 that connects all four sides and bulges outward.
By tying the top bar, it blends best with the base fabric and stabilizes when clipping the top bar, and prevents the needle from shaking due to looseness.

By the way, top clothing A according to the present invention and conventional top clothing B and C with round wire, track wire, and diamond wire.

D was used to measure the number of neps and the amount of end cotton, and the results shown in Figure 4(a) (1)) were obtained.

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

Effects of the Invention By paying close attention to the above-mentioned structure, the present invention can sufficiently withstand the strong bending stress generated between the needle cloths of the carding machine, and the fibers to be combed can be gripped and opened at the tips of the needles in the action direction. However, it is formed with a radius of curvature R1 that does not cause cutting, and the opposing corners at both ends in the short axis direction are formed with a radius of curvature R1 that is greater than the radius of curvature R1, which improves the instability and strength of sitting against the base fabric, which is a drawback of rhombic wires. Since it is constructed with a large radius of curvature R2, and the four sides connecting R1 and R2 are formed by a curve R3 that bulges outward, the fibers that interact with the metallic clothing on the cylinder gripped at the tip will generate large bending stress. The fibers are completely opened along the smooth streamlined outer periphery, and no fiber breakage occurs. In addition, the U-shaped needle sits well and stably on the base fabric, eliminating wobble that can cause needles to be set up or misaligned, thereby preventing shortening of life due to causes of needle start or needle contact accidents. It will be extended. In order to increase the elasticity of the needle,
By using multiple sheets of cotton fabric and high tensile strength, high modulus synthetic fiber woven fabric as the base layer, and placing an elastic rubber sheet between them to use the base fabric for nine-piece fabric, Binaxilane, which is ideal for carding, can be obtained and folded. No more needles. In addition, the needle tip maintains its sharpness by side polishing, the hardness is increased by induction hardening only at the tip, and the shape minimizes changes in the needle head diameter even when placed, resulting in excellent long-term opening performance. This is an effective invention.

[Brief explanation of drawings]

FIG. 1 is an enlarged sectional view showing the clothing line of the top clothing of the present invention, and FIG. 2 shows the results of an experiment using the top clothing of the present invention and the top clothing of the first embodiment. Fig. 5 is a comparative illustration of the number of nep, (b) is a comparative illustration of the amount of end cotton, and Fig. 5 is a partially enlarged cross-sectional view showing the needle planting state of the conventional top clothing. (1)...Surface layer, C2)...Base layer, (3)...Cotton cloth, (4)...Synthetic fiber woven fabric, (5)...Elastic rubber sheet, (6)... Needle, (7)...Tip, (8)...
...Needle type, (9)...Side surface polishing, (10)...
・Waist, (11)...back side of base fabric, (12)...diamond-shaped clothing line. Figure 3 Figure 2 @ 4 (a) Figure (b)

Claims (4)

[Claims] (1) The radius of curvature R_1 of the tip and rear end in the action (long axis) direction of the needle and the radius of curvature R_2 of the opposing corners of both ends in the short axis direction have the relationship R_1<R_2, and the above-mentioned Clothing wire formed in a composite cross-sectional shape of a rhombus and a circle, which is formed by connecting the ends of the curvature radii R_1 and R_2 with a curved line that bulges outward, is made by planting needles in the base fabric for clothing. Features top clothing. (2) The radius of curvature R_1 of the tip and 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 the opposing corners of both ends in the direction of the short axis is 0. ．．
Top clothing according to claim 1, having a diameter of 0.08 to 0.12 mm. (3) The top clothing according to claims 1 and 2, wherein the tip of the needle is needle-shaped and polished on the side, and the hardness of the tip is 760 to 900 HV. (4) The top clothing according to claim 1, wherein the base layer of the clothing base fabric is formed of a laminate of a plurality of cotton fabrics and synthetic fiber woven fabrics and an elastic rubber sheet inserted between them. .