JPH08155546A - Buffer material for taking up metallic strip and metallic strip - Google Patents

Abstract

PURPOSE: To decrease lap marks at the time of taking up a metallic strip by forming the front end and/or rear end of a buffer material for taking-up to be inserted into the front end of this metallic strip to a special shape at the time of taking up the metallic strip. CONSTITUTION: The shape of at least either of the front end and rear end of the buffer material for taking-up to be inserted into the front end of the metallic strip at the time of taking up the metallic strip is so formed as not to include a part which exceeds 100m and intersects orthogonally with the longitudinal direction of the metallic strip. As a result, the deformation of the metallic strip by discontinuous differences in level at the front end and rear end of the buffer material for taking-up is lessened and the lap marks are decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning material for winding which is inserted into a tip portion of a metal strip when winding the metal strip to reduce a wrap mark of the metal strip, and the winding cushioning material. It concerns metal strips.

[0002]

2. Description of the Related Art When winding a metal strip, it is wound around a winding machine called a mandrel or reel. This time,
Defects often called mandrel marks, reel marks, lap marks, and top marks occur.

The main one of these defects is a bent mark generated in the portion overlapping the tip end after the second winding because the leading edge of the metal strip is rectangular.

These marks (generally referred to as lap marks hereinafter) occur on every line accompanied by winding of metal strips, and various countermeasures and proposals have been made.

As a conventional technique for attaching an object to the tip of the coil during winding, there is a technique disclosed in Japanese Utility Model Laid-Open No. 61-148409, and as a technique for winding a cushioning material, Japanese Patent Laid-Open No. 59-1019. There are techniques disclosed in Japanese Patent Application Laid-Open No. 3-81016.

In the technique of (1), the step is made thickest and the thickness corresponding to the metal strip (therefore, the step becomes twice as thick after mounting), and a jig that becomes thinner before and after that is attached and wound. It is a thing to take. The technique of (1) inserts a cushioning material into a metal strip.

[0007]

While the above techniques may be effective for each particular line, they are not universal.
In the technology of, the surface pressure of the stepped portion is rather high,
The surface pressure before and after that also increases, and there are difficulties in selecting the material of the cushioning material, the shape, and the mountability.

The technique of [1] is effective for steel strips having a large plate thickness and metal strips having a high yield point, but for steel strips having a thin plate thickness and metal strips having a low yield point, the front or rear end of the inserted cushioning material is used. There is a problem that a new lap mark is generated in the part.

The present invention solves the problems of the prior art of this kind, and is a buffer material for winding a metal strip having a simple and versatile special longitudinal end shape, and a winding buffer. The purpose is to provide a metal strip with an inserted material.

[0010]

According to a first aspect of the present invention, at least one of the front end portion and the rear end portion has a shape of 100.
It is a cushioning material for winding a metal strip, which has no portion orthogonal to the longitudinal direction of the metal strip and has a length of more than mm.

The invention according to claim 2 is characterized in that at least one of the front end portion and the rear end portion does not have a portion orthogonal to the longitudinal direction of the metal strip. It is a material.

According to a third aspect of the present invention, there is provided a buffer material for winding a metal band according to claim 1 or 2 within the inner circumference of the metal band wound in a coil shape or within 5 turns from the inner circumference. The metal strip is characterized by being inserted with a length of 1.3 turns or less.

[0013]

The cushioning material for winding according to the present invention is inserted at the time of winding a metal strip to prevent a lap mark due to the leading end of the winding of the metal strip regardless of the thickness of the metal strip and the yield point. is there.

At this time, in the shape of at least one of the front end portion and the rear end portion of the winding cushioning material, the portion orthogonal to the longitudinal direction of the metal strip is reduced as much as possible, so that Alternatively, it is possible to reduce the deformation of the metal band due to the discontinuous step at the rear end portion (the boundary portion with or without the cushioning material), and thus, even the lap mark based on the concentrated stress at the step due to the thickness of the cushioning material itself can be reduced. Can be reduced.

As will be described later, it is effective to reduce the lap marks by setting the lengths of at least one of the front end portion and the rear end portion orthogonal to the longitudinal direction of the metal strip to be 100 mm or less. . Further, at least one of the front end portion and the rear end portion may have various shapes without a portion orthogonal to the longitudinal direction of the metal strip.

Examples of the material of the cushioning material include non-crosslinked high-foamed polyethylene sheet, cross-linked high-foamed polyethylene sheet, cardboard paper, corrugated cardboard on one side, rubber, non-woven fabric (felt, etc.), elastic body and plastic deformable body. Used.

When rust-preventing oil is applied to the metal strip, it is necessary to consider non-immersion property in order to prevent deterioration of oil resistance and rust-preventing effect. At this time, the material of the cushioning material should be selected. Alternatively, the surface contacting the metal strip may be treated with vinyl coating or the like.

When the cushioning material for winding is manufactured without loss by cutting or punching from a long material, the shape in which the tip shape is reversed becomes the rear end shape. In this case, both ends are metal strips. It is preferable that the portion orthogonal to the longitudinal direction of the is shaped as small as possible.

The winding cushioning material is inserted on the inner periphery of the coiled metal strip or within 5 windings from the inner periphery with a length of 1.3 rolls or less. The lap mark can be reduced by inserting it so as to include the place located at the tip of the. The reason for limiting the number of windings to 5 or less from the inner circumference is that the length of the lap mark between the reel before insertion and the tip of the metal band becomes longer, so all lap marks including this lap mark It is preferable to insert it between the first roll and the second roll as much as possible in order to reduce the noise.

The insertion length is usually 50 mm or more and 1.3 turns or less including the position corresponding to the tip of the metal strip. Preferably, for the reduction of lap marks, 1
It is better that the cushioning material does not overlap as the winding is weak. The length of 1.3 rolls or less is an economical problem.

It may be inserted between the reel and the metal band (inner circumference). This can be inserted relatively easily when the reel grips the tip of the metal band, but when winding with a belt wrapper, it is difficult to insert and insert the cushioning material for winding.

In the case of winding with a belt wrapper, the metal band is wound around the reel and then inserted, or the end of the metal band before winding around the reel or the end of the first to fifth windings is included for winding. Alternatively, a cushioning material may be attached to the belt wrapper after the cushioning material is attached (a tape or the like), and a cushioning material insertion device may be separately provided near the reel.

The thickness of the cushioning material for winding should be determined by the compression amount (ratio) with respect to the winding tension of the cushioning material, the thickness of the metal strip, and the yield point of the metal strip. For example, in the case of a steel strip, the thickness of the crosslinked high-foaming polyethylene sheet is usually 3 to
At 5 mm, for low yield point steel strips, the thickness of the cross-linked high-foam polyethylene sheet should be 2-3 mm.

[0024]

EXAMPLE FIG. 1 shows a cushioning material when a metal band having a low yield point is wound around a reel of a winder by using cross-linked high-foaming polyethylene sheets having various insertion tip shapes as a cushioning material for winding. The length of the lap mark generated at the tip portion is the length from the position where the cushioning material is inserted, and the degree is visually determined and displayed. The tip shape of the wound cushioning material used is shown in FIG.

The metal band of FIG. 1 has a yield point of 14.5-16.5.
A Kgf / mm ² steel strip with a thickness of 0.8 mm, and when wound on a 24-inch reel, a cushioning material made of a cross-linked high-foaming polyethylene sheet (foaming ratio 30 times, product name Softlon) having a thickness of 2 mm, The number of turns of the steel strip is less than one turn between the third and fifth turns of the reel.

As a result, the length of the lap mark is short after the position at which the cushioning material for winding is inserted in each of all 11 of the present invention. On the other hand, Maru 14, Maru 13, Maru
In No. 12, since the length L of the portion of the winding cushioning material orthogonal to the longitudinal direction of the metal strip exceeds 100 mm, the length of the lap mark generated at the tip of the cushioning material is long.

In FIG. 4, when the winding cushioning material is manufactured from a long material by cutting or punching without loss, the effect is confirmed also in the case where the shape inverted from the tip shape becomes the rear end shape. Are doing That is, against, against, against, against 1
The number is 0, 10 to 12 and 13 (however, 12 and 13 are outside the invention), but any of the shapes of 11 to 11 of the invention have excellent results.

FIG. 2 shows the length L of a portion of the winding cushioning material of the present invention orthogonal to the longitudinal direction of the metal strip and the length of the lap mark (similar to FIG. 1, the tip of the cushioning material). The length of the lap mark generated in the portion is the length from the position where the cushioning material is inserted, and the degree is visually determined and displayed.), Length L
It can be seen that a value of 100 mm or less brings about a great effect. That is, L100 mm or less is excellent in any shape from the tip shape to the round shape 13.

FIG. 3 shows the angle Q of the tip of the cushioning material for winding of the present invention with respect to a line orthogonal to the longitudinal direction of the metal strip and the length of the lap mark (as in FIG. 1, the tip portion of the cushioning material). The length of the lap mark generated in 1. is the length from the position where the cushioning material is inserted, and the degree is visually judged and displayed.), And the preferable range of the angle Q exceeds 10 degrees (of course, the maximum is 80 degrees). Below). That is, the tip shape ~,
It has been found that the angle Q has a great influence on any of the shapes 1 to 3, and therefore the shape should not be orthogonal to the longitudinal direction of the metal strip.

The metal strip of the present invention was of excellent quality, with no lap marks due to the leading end of the metal strip and the buffer material for winding, and no trouble in loading the metal strip in the next step.

In the embodiment, lap marks are easily generated,
Only steel strips with a low yield point are shown, but of course, those with a thick plate and those with a high yield point give good results.

In the examples, only the cross-linked high-foamed polyethylene sheet (trade name Softlon) was used as the cushioning material for winding, but non-cross-linked high-foamed polyethylene sheet, cardboard paper, corrugated cardboard on one side, Even if it is an elastic body such as rubber or non-woven fabric, or a plastically deformable body, the effect of almost the same tendency can be obtained.

In the embodiment, the determination is made by the length of the lap mark only at the leading end of the winding cushioning material, but the same effect can be obtained at the trailing end.

The relationship between the width of the buffer material for winding and the width of the metal strip is
When considering only the lap mark, the width of the cushioning material for winding should be widened by 50 mm or more on one side.
This is because if it is too narrow, a lap mark is generated at the end of the metal band width. Usually, it should be within a range of minus 50 mm to plus 10 mm, preferably within a range of minus 20 mm to plus 5 mm, in consideration of transportation and packaging after winding.

[0035]

INDUSTRIAL APPLICABILITY The cushioning material for winding a metal strip according to the present invention is effective for reducing lap marks when winding any metal strip. The metal strip of the present invention can significantly reduce both the lap mark when winding the front end of the metal strip and the wrap mark by the cushioning material for winding, and there is no trouble in charging the metal strip in the next step, which is excellent quality. Is.

[Brief description of drawings]

FIG. 1 is a diagram showing a relationship between various tip shapes of a cushioning material for winding and a length of a lap mark in an example of the present invention and a comparative example.

FIG. 2 is a diagram showing the relationship between the length of the wrap mark and the length of the portion of the winding buffer material orthogonal to the longitudinal direction of the metal strip in the example of the present invention and the comparative example.

FIG. 3 is a diagram showing a relationship between an angle of a tip of a winding cushioning material with respect to a line orthogonal to a longitudinal direction of a metal strip and a length of a lap mark in an example of the present invention and a comparative example.

FIG. 4 is a diagram showing various tip shapes of a cushioning material for winding according to an example of the present invention and a comparative example.

Front Page Continuation (72) Inventor Makoto Kubo 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd.

Claims (3)

[Claims] 1. A coil for winding a metal strip, characterized in that at least one of the front end portion and the rear end portion does not have a portion having a length exceeding 100 mm and orthogonal to the longitudinal direction of the metal strip. Cushioning material. 2. A cushioning material for winding a metal strip, wherein at least one of the front end portion and the rear end portion does not have a portion orthogonal to the longitudinal direction of the metal strip. 3. A coiled metal strip having an inner circumference or within 5 turns from the inner circumference, wherein the metal strip winding cushioning material according to claim 1 or 2 is 1.3 rolls or less. A metal strip characterized by being inserted in length.