JP2651547B2 - Metallic wire for carding machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to the shape of a metallic wire for a carding machine which is used by being wound around a cylinder of a carding machine used in a spinning process.

[Conventional technology and its problems]

In recent years, with the labor saving in the spinning process, the production amount per carding machine has been increased.

Conventionally, with this high production carding machine, the sixth
As shown in the figure, the working angle X of the metallic wire for cylinder
75 ° to 78 °, back angle Y 40 ° to 60 °, tooth depth B 0.8mm to 0.9mm, thickness C 0.6mm to 0.7
mm or less, the number of needles P is 800P / (25.4mm) ² or more 900P / (25.4mm)
mm) The number of needles was increased by using a metallic wire having a diameter of ² or less so that the spreading effect did not decrease even when the fiber density on the cylinder increased in a high production area.

When increasing the number of needles of the metallic wire, there is a method of increasing the number of peaks of the metallic wire. However, if the depth of the teeth is increased and the number of peaks is further increased, the included angle Z of the tooth (working angle X−back angle) is increased. There is a problem that the angle Y) becomes small, the strength of the tooth tip portion is reduced, and leaf residue is pierced.

Conversely, the thickness of the metallic wire may be reduced, but if the depth of the teeth is further reduced to further reduce the thickness,
There is a problem that leaf residue tends to be clogged between the leaves, which rather inhibits the carding action.

[Means for solving the problem]

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

In the present invention, the working angle X is 60 ° or more and less than 70 °, and the tooth depth B is
0.4mm or 0.85mm or less, the thickness C and 0.5mm or more 0.7mm or less, the stepped portion is provided on the back angle, the back angle Y ₁ of the stepped portion upper 18 ° or more 30 ° or less, the stepped subordinate unit back angle Y ₂ form below 45 ° or more 25 °, more 0.1B from the tooth tip of the stepped portion depth B '0.
A metallic wire for a carding machine characterized by being within 2B and at least 0.1B and within 0.2B from the dorsal corner, and having a gentle concave curve at the tooth bottom from the dorsal corner.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a metallic wire for a cylinder according to the present invention, and FIG. 2 shows an enlarged view of the tip of the metallic wire.

The metal wire for the carding machine of the present invention has a needle height A: 2.8 m
m, tooth depth B: 0.5mm, thickness C: 0.5mm, edge height D: 1.5mm, tip thickness E: 0.04mm, root thickness F: 0.25mm, tip length G: 0, Working angle X: 63 °, Back angle Y ₁ : 18 °, Back angle Y ₂ : 28 °, Step depth of the back angle B ': 0.05mm, Number of peaks M: 17 peaks / 25.4mm, Needle head Number P: 86
4P / (25.4mm) ²

In addition, if the tooth tip length G is 0.05 mm or less, a good fiber opening action can be performed.

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

If the working angle is less than 60 °, the transfer of the fiber from the cylinder to the doffer is poor, and the fiber is easily deposited on the cylinder.
The opening action becomes excessive and the number of NEPs increases sharply.

Back angle Y between 18 ° and 30 ° (Y ₁ ) and 25 ° and above
An angle (Y ₂ ) of 45 ° or less is appropriate, and the depth B ′ of the stepped portion is appropriately in the range of 0.1B or more and 0.2B or less from the tooth tip, and the included angle Z of the tooth tip is 30 ° or more and 52 ° or less. In the high-speed, high-production area, the tooth tip is not damaged even by an abnormal impact during the carding operation, and a sufficient tooth tip strength is obtained.
There is no sticking of leaf residue.

The two angles Y ₁ and Y ₂ forming the back angle Y exceed 30 °,
And when it exceeds 45 °, the tooth tip is weak and the tooth tip is easily damaged. Also, if it is less than 18 mm and less than 25 mm, the needle head area of the metallic wire is easily polished to increase the needle head area, reducing the carding action, and at the same time, the space where the fiber enters between the needle heads is narrowed, and No carding action is obtained.

If the stepped portion depth B 'is less than 0.1B, there is a problem that the strength of the tooth tip is weakened and the tooth tends to be missing. Also, 0.
If it exceeds 2B, the needle head area tends to increase due to the polishing of the needle head, which causes a problem that the web quality is deteriorated in high production spinning.

FIG. 3 is an enlarged view of the tooth portion of the metallic wire for a cylinder. If there is a refraction point L at the dorsal corner and the bottom of the tooth as indicated by the broken line, a vortex is generated in the air flow, resulting in good carding. Since the function cannot be performed, it is preferable to form a gentle concave curve at the tooth bottom rather than at the dorsal corner.

The tooth depth B is 0.4 mm or more and 0.7 mm or less, and the thickness C is 0.5 mm.
It is appropriate that the number of peaks M is 16 or more and 18 or less, and sufficient carding action can be obtained even when the fiber density per unit area on the cylinder surface is high in the high-speed and high-production area. .

The friction coefficient on the working angle side of the tooth is 0.4 to 0.8, the friction coefficient on the dorsal angle side is 0.2 to 0.6, which is reduced by brushing the dorsal angle side, and the surface roughness of the tooth side is Ra = Since it is 0.2 to 1.5 μ, clogging of leaf residue and short fibers is greatly reduced, and the opening property is improved.

Further, at least one side of the edge is formed on a knurled surface, and the surface roughness of the surface is roughened to Ra = 1.2 to 3.0 μ. The resistance is large, the strength of the entire wound wire is large even in high-speed high-production spinning, and a good carding action can be maintained for a long time.

As shown in FIG. 4, the working angle X of the metallic wire for the doffer combined with the metallic wire for the cylinder is
The best is 55 mm or more and 65 mm or less, and the tooth depth B is 2.2 mm or more and 3.0 mm or less. Even under the condition of high production spinning, the doffer can grasp the fiber sufficiently from the cylinder.

(Operation)

The results of a comparison test between a conventional metallic wire and a conventional metallic wire wound on a metallic wire for a cylinder and a metallic wire for a doffer at a high speed and a high production carding machine were as follows.

Spinning conditions: Fiber: Cotton 20th count Production amount: 50 kg / hr Number of cylinders: 450 rpm Nep number: From conventional 150 wires / g to 50 wires / g in the metallic wire of the present invention.

FIG. 5 shows the rate of increase in the number of NEPs between the metallic wire A of the present invention and the conventional metallic wire B.
It can be seen that the metallic wire A of the present invention has a small rate of increase in the number of neps even when the number of times of brushing is reduced.

Further, in the conventional metallic wire, the leaf debris is clogged between the teeth, and the removal of the leaf debris is performed by brushing the surface of the cylinder every three to four days. Almost gone.

〔The invention's effect〕

As described above, the present invention forms the metallic wire wound around the cylinder into a specific shape, and appropriately sets the friction coefficient and the surface roughness of the tooth portion, so that the number of times of the stylus in the high-speed and high-production spinning is reduced. Even so, the number of NEPs was remarkably reduced, and sliver with good fiber parallelism could be spun.

Also, although the thickness of the metallic wire is thin, the depth of the teeth is shallow, and the friction coefficient on the dorsal angle side of the teeth is reduced,
Leaf residue became difficult to clog.

Further, since the stepped portion having the above-described configuration is provided at the dorsal corner and formed at two angles, the strength of the tooth tip is high, the tooth tip is hardly damaged, and the sticking of the leaf residue hardly occurs.

Furthermore, the production volume per carding machine is
High production of 50-80kg / hr is possible from about 30kg / hr, and even in high-speed high-production spinning, the strength of the entire wound wire is large, and excellent effects such as good carding action can be maintained for a long time. It is an invention.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a metallic wire for a carding machine according to the present invention, wherein (a) is a side view, (b) is a front view, and FIG. 2 is an enlarged view of a tooth tip of the metallic wire of the present invention. , FIG. 3 is an enlarged view of the tooth portion, FIG. 4 is a metallic wire for a doffer used in combination with the metallic wire, (a) is a side view, (b) is a front view, and FIG. Figure 6 shows the relationship between the number and the years of use.
(A) is a side view, and (B) is a front view. A: Needle height, B: Tooth depth C: Thickness, D: Edge height E: Tooth thickness, F: Tooth thickness G: Tooth length, X: … Working angle Y, Y ₁ , Y ₂ …… Back angle

Claims (3)

(57) [Claims] 1. The working angle X is not less than 60 ° and less than 70 °, and the tooth depth B is
The 0.4mm or 0.85mm or less, the thickness C and 0.5mm or more 0.7mm or less, the stepped portion is provided on the back angle, the back angle Y ₁ of the stepped portion upper 18
° or more 30 ° or less, the back angle Y ₂ of the stepped subordinates portion formed below 45 ° or more 25 °, 0.1B or from the tooth tip of the stepped portion depth B '
A metallic wire for a carding machine, characterized in that the tooth bottom is formed with a gentle concave curve from the dorsal corner portion within 0.2B. 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 dorsal angle side. 3. The side surface of the tooth has a surface roughness of Ra = 0.2-1.5μ, at least one side of the edge is formed on a knurled surface, and the surface roughness of the surface is Ra = 1.2-3.0μ. Claim 1
The metallic wire for a carding machine according to the above.