JPH03227414A - Metallic wire for carding machine - Google Patents

Abstract

PURPOSE:To obtain the title metallic wire most suitable for mass production, having shallower depth of teeth, thin thickness, a working angle, a back angle of stepped part and depth in fixed ranges and tooth bottom parts formed in a moderate closed curve from the back angle part. CONSTITUTION:The objective metallic wire which has <=60 degrees-<70 degrees working angle X, 0.4-0.85mm depth B of tooth, 0.5-0.7mm thickness C, is provided with a stepped part at the back, further forms 18-30 degrees back angle Y1 on the upper part of the stepped part, 25-45 degrees back angle at the lower part of the stepped part, has depth B' of the stepped part in a range of 0.1B-0.2B from the tip of the tooth and of 0.1B-0.2B from the back angle part, is provided with tooth bottom part formed through a moderate closed curve from the back angle part and maintains excellently carding action for a long period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the shape of a metallic wire for a carding machine that is used by being wound around the cylinder of a carding machine used in a spinning process.

[Conventional technology and its problems]

In recent years, with efforts to save labor in the spinning process, efforts have been made to increase the production volume per carding machine.

Conventionally, in order to increase the production volume of this high-production carding machine, as shown in Fig. 6, the working angle X of the cylinder metallic wire is set at 75° or more and 78° or less, and the back corner Y is set at 40° or more and 60° or less. The depth B of the teeth is 0.8 m or more and 0.91 fi or less, the thickness C is 0.6 w or more and 0.7 - or less, and the number of needle heads P is 800 P/
(25,4m)" or more and 900P/(25,4m or less) is used, and the number of needle heads is increased so that the opening effect does not deteriorate even if the fiber density on the cylinder increases in high production areas. Was.

In order to increase the number of needle heads of the metallic wire, there is a method of increasing the number of threads of the metallic wire, but if the depth of the teeth is increased and the number of threads is further increased, the included angle 2 (working angle
- The back angle Y) becomes smaller and the strength of the tooth tip decreases,
There is a problem with the leaf dregs piercing through.

On the other hand, if the thickness of the metallic wire is made smaller (in some cases, but the depth of the teeth is made deeper) and the thickness is made even smaller, leaf debris tends to get stuck between the leaves, which will actually impede the carding action. There is a problem with doing so.

[Means to solve the problem]

It is an object of the present invention to solve the above-mentioned conventional problems, to form a metallic wire for a cylinder of a carding machine into a specific shape, and to provide a metallic wire for a carding machine that is optimal for high production.

The present invention has a working angle X of 60° or more and less than 70°, and a tooth depth B.
0.4m or more and 0.85- or less, thickness C is 151 or more G
, 7- or less, a stepped part is provided at the back corner, the back corner Y1 of the upper part of the stepped part is 18° or more and 30° or less, and the back corner Y of the lower part of the stepped part is 25° or more and 45° or less. The depth B' of the stepped part is set to be at least αIB and not more than α2B from the tip of the tooth, and at least 0.1B and not more than 0°2B from the back corner, and the bottom part is formed with a gentle concave curve from the back corner. This is a metallic wire for a carding machine.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the metallic wire for cylinders of the present invention, and
The figure shows an enlarged view of the tip of the tooth.

The metallic wire for the carding machine of the present invention has a needle height A: λ8m
s, tooth depth B: (L5m, thickness C: 15m, edge height D
: 1.5m, tooth tip thickness E: 0.04 days, tooth root thickness F: 0
．． 25m, tooth tip length G: 0, working angle Number M: 17*/25.4m1
Number of needle heads P: 864P/(25,4 needles)2.

Note that if the tooth tip length G is 0.05 trs or less, a good fiber opening effect can be achieved.

The working angle X of the metallic wire is suitably 60° or more and less than 70°, so that fibers do not fly out due to centrifugal force even in high-speed, high-production ranges, and sufficient carding action can be performed.

In addition, if the working angle is less than 60°, the transfer of fibers from the cylinder to the docker is poor, and the fibers are likely to be deposited in the cylinder.
The opening effect becomes excessive and the number of neps increases dramatically.

The back corner Y is at an angle of 18° or more and 30° or less (Yl) and 25
It is formed at an angle (Mo) of 45° or more, and the depth B' of the stepped part is 0.1B or more (appropriately within L2B) from the tooth tip, and the included angle 2 of the tooth tip is 30° or more and 52 ° or less, even in high-speed, high-production areas, the tips of the teeth will not be damaged by abnormal impacts during carding, and sufficient strength of the tips of the teeth will be obtained, as well as prevent the penetration of leaf scraps. Does not occur.

Two angles y1 forming the back corner Y. If Y* exceeds 30° and exceeds 45°, the strength of the tooth tip will be weak and the tooth tip will be easily damaged. If the angle is less than 18 degrees and less than 25 degrees, the area of the needle heads of the metallic wire tends to increase due to polishing, which reduces the carding effect and at the same time narrows the space in which the fibers can enter between the needle heads, making it difficult to obtain sufficient space. A good carding effect cannot be obtained.

If the stepped part depth B' is less than (LIB), the strength of the tooth tips will be weak (and the problem will arise that chips are likely to become teeth.
If it exceeds 0.2B, the area of the needle head tends to increase due to polishing of the needle head, resulting in a problem of deterioration of web quality in high-production spinning.

In addition, Fig. 3 shows an enlarged view of the teeth of the metallic wire for cylinders, and if there are bending points at the back corner and the bottom of the teeth as in the conventional case shown by broken lines, vortices will be generated in the air flow, which will result in good carding. Therefore, it is better to form a gentler concave curve at the bottom of the tooth than at the back corner.

In addition, the tooth depth B is 0.4 fins or more and 0.7 m or less, and the thickness C is 0.
．． 51 or more and 0.7 or less, and the number of threads M is 16 or more and 18 or less, and in high-speed, high-production areas, even if the fiber density per unit area on the cylinder surface is high, sufficient carding action can be achieved. is obtained.

In addition, the friction coefficient on the working angle side of the teeth was reduced to 0.4 to 0.8, and the friction coefficient on the back angle side was reduced to α2 to 0.6 by brushing the back angle side. Surface roughness Ra=0
．． Since the thickness is set to 2 to 1.5μ, clogging with leaf debris and short fibers is greatly reduced, and opening properties are improved.

In addition, at least one side of the edge is formed into a knurled surface, and the surface roughness of the surface is roughened to Ra = 1.2 to 3.0μ, so when the wire is wound around a cylinder drum, the side surface of the edge of the wire The frictional resistance between the wires is large, and even in high-speed, high-production spinning, the overall strength of the wound wire is large, and good carding action can be maintained for a long time.

As shown in Fig. 4, the metallic wire for the docker combined with the metallic wire for the cylinder has a working angle X of 5.
5° or more and 65° or less, tooth depth B is 12m or more3. OI
The following is best, and the fiber can be sufficiently grasped from the cylinder even under high production spinning conditions.

[For production]

The above metallic wire for cylinders and metallic wire for dockers were wound on a high-speed, high-production carding machine, and a spinning comparison test with conventional metallic wire was conducted, and the results were as follows.

Spinning conditions: Fiber 2-cotton 20 count Production volume: 50Kg/hr Norinda rotation speed: 450r, p, m.

Number of nep: Conventionally, it was 150 nep/g, but in the metallic wire of the present invention, it is 50 nep/g.

Furthermore, Fig. 5 shows the rate of increase in the number of nep between the metallic wire A of the present invention and the conventional metallic wire B, and it shows that the metallic wire A of the present invention does not increase the number of nep even if the number of times of polishing is reduced. It can be seen that the proportion is small.

In addition, with conventional metallic wires, leaf debris clogs between the teeth, and the surface of the cylinder must be brushed every 3 to 4 days to remove the leaf debris, but with the metallic wire of the present invention, leaf debris becomes clogged. It's almost gone.

〔Effect of the invention〕

As described above, in the present invention, the metallic wire wound around the cylinder is formed into a specific shape, and the friction coefficient and surface roughness of the teeth are set appropriately, so the number of times the needles are polished is reduced in high-speed, high-production spinning. However, the number of neps was significantly reduced, making it possible to spin a sliver with good fiber parallelism.

Furthermore, although the thickness of the metallic wire is thin, the depth of the teeth is shallow, and the coefficient of friction on the dorsal angle side of the teeth is reduced, making it difficult for leaf debris to become clogged.

In addition, since the stepped portion of the above structure is provided at the back corner and is formed at two angles, the strength of the tooth tip is high, and it is less likely to be damaged and less likely to be penetrated by leaf scraps.

Furthermore, the production volume per carding machine has been reduced to 30% per carding machine.
It is possible to achieve a high production rate of 50 to 80 Kg/hr from about Kg/hr, and even in high-speed, high-production spinning, the strength of the entire wire is high and the carding action is long (maintainable). This invention has the following effects.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the metallic wire for a carding machine of the present invention, (c) is a side view, @ is a front view, Fig. 2 is an enlarged view of the tip of the tooth of the metallic wire of the present invention, Figure 3 is an enlarged view of the teeth, Figure 4 shows the metallic wire for dosing used in combination with the same metallic wire, (A) is a side view, @ is a front view, and Figure 5 is the number of nep. Figure 6 shows the conventional metallic wire, side view,
(b) is a front view. A: Needle height B: Tooth depth C
・・・・・・Thickness D・・・・Edge height E・
...Tooth tip thickness F...Tooth root thickness G.
...Tooth tip length X ...Working angle Y, Y
,,Y,...The dorsal angle marks are shown in Figure (a) (b) Figure (a) (b) Figure (a) (b) Figure 100...Tsubozuki

Claims (3)

[Claims] (1) Working angle
or more and 0.7 mm or less, a stepped part is provided at the back corner, and the back angle Y_1 of the upper part of the stepped part is 18° or more and 30° or less, and the back angle Y_2 of the lower part of the stepped part is 25° or more and 45° or less. A metallic wire for a carding machine, characterized in that the stepped portion depth B' is 0.1 B or more and 0.2 B or less from the tooth tip, and the tooth bottom portion is formed with a gentle concave curve from the back corner portion. (2) The metallic wire for a carding machine according to claim 1, wherein the coefficient of friction of the teeth is 0.4 to 0.8 on the working angle side and 0.2 to 0.6 on the back angle side. (3) The surface roughness of the side surface of the tooth is Ra = 0.2 to 1.5 μ, and at least one side of the edge is formed into a knurled surface, and the surface roughness of the surface is Ra = 1.2 to 3. The metallic wire for a carding machine according to claim 1, wherein the wire has a thickness of .0μ.