JP2005320662A - Metallic wire for spinning machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the wear in the ridges of a metallic wire, improve the quality of a web, and improve the life of the metallic wire by reducing the concentration of fibers on the working surfaces of the teeth of the metallic wire. <P>SOLUTION: This metallic wire for a spinning machine is characterized by the following characteristics. The working surface of each tooth is formed of two curved surfaces comprising the first curved surface on the tooth tip side and the second curved surface on the tooth bottom side. The interface P of the two curved surfaces at a contact point between the end portion of the second curved surface on the tooth bottom side and its tangent is placed at 15 to 25 % of the depth B of the tooth from the tooth tip Q. The first curved surface on the tooth tip side is formed at an apparent working angle α of 43 to 50° to a line passing through the tooth tip Q as a tangent. The second curved surface on the tooth bottom side is formed at an apparent working angle β of 53 to 60° to a line passing through the tooth tip Q as a tangent. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a metallic wire for a spinning machine that is used in a spinning carding machine and has a good fiber opening action at high speed and high production.

  Conventionally, when natural fibers or synthetic fibers are opened using a carding machine, a metallic wire for a cylinder is used in which a working angular surface is formed in a straight line and a tooth bottom is connected by an arc surface. However, in the above-described metallic wire, increasing the number of rotations of the drum of the carding machine in order to increase the productivity and further increasing the supply amount of the raw cotton to be supplied will increase the fiber density on the metallic wire, and the function of the teeth. Since the fibers sink into the tooth bottom along the corner surface, there is a problem in that the fibers are insufficiently opened and nep in the web increases.

For this reason, as shown in FIG. 4, in the metallic wire having an overall height A of 2.8 mm, a tooth depth B of 0.4 mm to 0.6 mm, and an edge thickness C of 0.6 mm, The working surface 8 is formed by smoothly connecting a tooth tip 9 constituted by a straight line having a working angle X of 60 ° and a tooth base 10 having a slope composed of a straight line in the opposite direction to the slope of the tooth tip 9. Further, a cylinder metallic wire 13 is considered in which the back surface 11 is constituted by a straight line having a back angle Y of 32 °, and the working surface 8 and the back surface 11 are each smoothly connected to a tooth bottom 12 formed in a straight line. .
Japanese Utility Model Publication No. 63-102773

  However, the metallic wire 13 for the cylinder has a high-speed and high-production, and the fibers gripped by the tooth working surface 8 are caused by the flow of the air flow generated by the high-speed rotation of the cylinder roller and the inclination of the working surface 8. Due to the balance, along the inclination of the working surface 8, the fiber gripped on the tooth tip 9 side sinks in the direction of the tooth root 12, and the fiber gripped on the tooth base 10 side tends to float in the direction of the tooth tip 9. is there. For this reason, it becomes easy to concentrate the said fiber at the intersection S formed by the working surface of the tooth tip formed linearly and the working surface of the tooth root formed linearly, and the ridgeline at the tooth intersection S is locally There is a problem that a notched portion is generated by abrasion, and a fiber is cut at the notched portion, thereby deteriorating the quality of the web and shortening the life of the metallic wire.

  The metallic wire for a spinning machine according to the present invention is made to solve the above-described problems, and has teeth having an overall height A of 2.0 mm to 3.0 mm and a tooth depth B of 0.4 mm to 0.6 mm. It is a metallic wire, and the working surface is composed of two different circular arc surfaces.

  In the metallic wire configured as described above, the working surface of the tooth is composed of a first curved surface and a second curved surface, and the first curved surface has a curvature radius R1 of 0.20 mm to 0.38 mm, The apparent working angle α of the tangent line T passing through the apex Q of the tooth tip is 40 ° to 50 °, the second curved surface has a radius of curvature R2 of 0.17 mm to 0.20 mm, and the tooth tip The apparent working angle β of the tangent line S passing through the apex Q is 50 ° to 60 ° and is smoothly connected to the tooth bottom. The metallic wire for a spinning machine is provided in which the joint point P between the first curved surface and the second curved surface is provided at a position of 15% to 25% from the apex Q of the tooth tip with respect to the tooth depth B. is there.

  And the back surface of a tooth | gear is formed by the straight line which made the back angle | corner (theta) 16 degrees-30 degrees, and the said back surface is comprised smoothly by the top part and tooth root which were formed of the circular arc surface.

  As described above, by forming the tooth shape on the working side of the tooth with two curved surfaces, the apparent working angle α of the first curved surface on the tooth tip side is small, and the apparent working angle α is on the root side. Since it increases while continuously changing as it goes to, the strength of the teeth can be increased and the apparent working angle β of the second curved surface on the root side can be increased, so that two curved surfaces At the joint point formed by intersecting, the fibers are dispersed along the upper and lower curved surfaces, and the fibers are less concentrated on the local part of the working surface of the tooth, so that the tooth edge wear can be reduced.

  Furthermore, since the apparent working angle is configured to be smaller toward the tip of the tooth, the fiber is easily gripped by the tip of the tooth, the fiber defibrating action is improved, and the nep can be reduced. Since the fiber transfer from the cylinder to the doffer is also improved, high speed and high production of the carding machine can be enabled.

  In the metallic wire for spinning machine of the present invention, the working surface of the tooth is constituted by two curved surfaces, and the joint point P of the two curved surfaces is located from 15% to 25% of the tooth depth B from the tooth tip Q. The first curved surface on the tooth tip side has an apparent working angle α of 43 ° to 50 °, so that the working angle becomes smaller at the tip of the tooth. For this reason, the fiber is easily gripped by the tip of the tooth and is subjected to a good defibrating action, so that the nep can be reduced. In addition, since the fibers are gripped by the tip of the teeth, the fibers are well transferred to the doffer, so that high speed and high production becomes possible.

  In addition, since the fibers are dispersed across the joint P, the local concentration of the fibers gripped by the teeth is reduced, ridge wear on the tooth working surfaces is reduced, and the life of the metallic wire can be extended.

  Furthermore, the invention has an excellent effect that the strength of the tooth tip can be improved and the life can be extended by configuring the top portion of the tooth with an arc surface in combination with the configuration of the tooth tip. It is.

  Hereinafter, an embodiment of a metallic wire for spinning machine according to the present invention will be described.

  1 to 3 show an embodiment of a metallic wire for a spinning machine according to the present invention, FIG. 1 is an enlarged front view of a main part, FIG. 2 is a cross-sectional view taken along the line JJ in FIG. It is explanatory drawing.

  1 to 3, the metallic wire 1 of the present invention has an overall height A of 2.0 mm to 3.0 mm, a tooth depth B of 0.4 mm to 0.6 mm, and an edge thickness C of 0. .4 mm to 0.5 mm, and the edge height D is 1.3 mm to 1.7 mm.

  The working surface 3 of the tooth 2 of the metallic wire 1 is composed of two curved surfaces, and the first curved surface on the tooth tip side has an apparent working angle α at the tangent T passing through the tooth tip Q, and the second surface on the tooth bottom side. Has an apparent working angle β at a tangent S passing through the tooth tip Q.

  The second curved surface on the root side has a radius of curvature R2 of 0.17 mm to 0.20 mm, one end is smoothly joined to the bottom 4 and the first curved surface on the tip side is one end. Constitutes the tooth tip Q, and the other end is joined at the contact point between the second curved surface and its tangent, thereby constituting a joint P between the second curved surface.

  The curvature radius R1 of the first curved surface is determined by setting the apparent working angle α passing through the tooth tip Q and the curvature radius R2 of the second curved surface.

  The apparent working angle α of the first curved surface is preferably 43 ° to 50 °, and the apparent working angle β of the second curved surface is preferably 53 ° to 60 °.

  The top 5 of the tooth 2 is preferably formed by a circular arc surface and smoothly joined to the back surface 6 having a back angle θ of 16 ° to 25 °.

  Furthermore, the junction point P of the two curved surfaces on the working surface 3 of the tooth 2 is preferably located within a range of 15% to 25% of the tooth depth B between the tooth tip Q and the tooth base 4. By doing so, the fiber is gripped by the tip portion of the tooth 2, the defibration property can be improved and the nep can be reduced, and the transition of the fiber to the doffer is also improved. Furthermore, since the joint point P is provided between the first curved surface and the second curved surface, the local concentration of the fibers gripped by the working surface 3 is reduced, and ridge wear is reduced. That is, if the position of the joining point P is less than 15%, the gripping force of the fiber is reduced and the defibration property is lowered, and if it exceeds 25%, the fiber is concentrated on the first curved surface to cause ridge wear. There is a problem.

  In the above configuration, the tooth depth B is set to 0.4 mm to 0.5 mm. However, by reducing the tooth depth B as described above, the defibration is improved and the cylinder of the carding machine is used. The fiber transition from to doffer becomes good.

  The apparent working angle α at the tip of the tooth 2 is preferably 43 ° to 50 °. If the working angle α is less than 43 °, the transition of the fibers to the doffer becomes worse, and when the working angle α exceeds 50 °. There is a problem that the defibration property of the fiber is lowered.

  Furthermore, the angle formed between the tangent line passing through the tooth tip Q of the circular arc surface at the top 5 of the tooth 2 and the horizontal plane is preferably 3 ° to 6 °, and when the angle exceeds 6 °, the tooth tip becomes thin, There is a problem that the strength of the tooth tip is lowered, the tooth tip is deformed, the wear of the tooth tip is accelerated, and the life is shortened. On the other hand, if the angle is less than 3 °, the strength of the teeth increases, but there is a problem that the defibration property is deteriorated and the quality of the web is deteriorated.

  Hereinafter, an embodiment of the metallic wire 1 for spinning machine according to the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the spinning wire metallic wire 1 has an overall height A of 2.0 mm, a tooth B depth B of 0.4 mm, an edge 7 thickness C of 0.4 mm, and an edge 7 of The height D is 1.3 mm.

  The working surface 3 of the tooth 2 is composed of two curved surfaces joined at the joint point P, and the second curved surface on the tooth bottom side is a line having an apparent working angle β passing through the tooth tip Q of 55 °. The first curved surface on the tooth tip side is a tangent line S, and the radius of curvature R2 is 0.19 mm. One end of the tooth tip side is the tooth tip Q and the other end is the second curved surface and its tangent line. A line joined with the contact point and having an apparent working angle α passing through the tooth tip Q of 45 ° is defined as a tangent line T, and a circular arc surface having a curvature radius R1 of 0.35 mm.

  The height h of the joint P is 25% of the tooth depth B, and is provided at a position of about 0.1 mm from the tooth tip Q.

  Further, the back surface portion of the tooth 2 is composed of a top portion 5 and a back surface 6, and the top portion 5 is formed by an arc surface having an angle formed by a tangent line passing through the tooth tip Q and a horizontal surface, and the back angle θ is 25 ° The back surface 6 is smoothly joined.

  Further, the second curved surface on the tooth bottom side and the tooth bottom 4 and the back surface 6 and the tooth bottom 4 are smoothly connected to each other, and the tooth 2 has 15 peaks per 25.4 mm in the length direction of the metallic wire 1. It is provided to become.

It is a principal part enlarged front view which shows one Example of the metallic wire for spinning machines of this invention. It is the JJ sectional view taken on the line of FIG. It is principal part explanatory drawing which shows one Example of the tooth | gear of the metallic wire for spinning machines of this invention. (A) is a principal part enlarged front view which shows the conventional metallic wire for spinning machines, (b) is KK sectional view taken on the line of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 13 Metallic wire 2 Teeth 3, 8 Working surface 4, 12 Tooth bottom 5 Top part 6, 11 Back surface 7 Edge part 9 Tooth tip 10 Tooth base

Claims (2)

A metal wire having an overall height A of 2.0 mm to 3.0 mm and a tooth depth B of 0.4 mm to 0.6 mm, wherein the tooth working surface is a first curved surface and a tooth bottom The joint point P of the two curved surfaces at the contact point between the end portion of the second curved surface on the tooth bottom side and the tangent line is formed from the tooth tip Q to the tooth depth B. 15% to 25% of the first, the first curved surface on the tooth tip side has an apparent working angle α of 43 ° to 50 ° with the line passing through the tooth tip Q as the tangent line, and the second curved surface on the tooth bottom side. A metallic wire for a spinning machine, characterized in that an apparent working angle β with a line passing through the tooth tip Q as a tangent line is 53 ° to 60 °. The metallic wire for a spinning machine according to claim 1, wherein the radius of curvature R2 of the second curved surface on the tooth bottom side is 0.17 mm to 0.20 mm.

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