JPS6135282Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an ironing roll (smoothing roll) made of a nonwoven fabric and provided to press the outer surface of a thin metal strip while it is being wound on a winding machine.

For example, when winding a relatively wide thin metal strip such as a thin metal plate or foil into a coil on the tension reel of a winding machine, the flatness of the strip may be inappropriate, or the cross-sectional shape (profile) of the strip may be laminated. Due to the non-cylindrical nature of the outer peripheral surface of the coil formed by winding, the strip may be wound with "wrinkles" in the longitudinal direction, which may impair the product value. In addition, because the winding tension is small, "misalignment" occurs in the width direction, causing the side end surfaces of the coil to become uneven, damaging the side edges of the strip, or causing misalignment to remain in subsequent processes. This may cause harmful effects such as

As shown in Fig. 1, the conventional method used to prevent the above-mentioned problems is to rotate a tension reel A attached to a winding machine and pass the strip B through a deflator roll C. When winding the strip onto a reel, the arm E that can raise and lower the outer winding portion near the tangent to the coil D
A small diameter ironing roll F is mounted on the tip of the ironing roll F.
The so-called ironing method is generally used.

In particular, if the target strip is relatively soft and easily scratches, such as aluminum, and its purpose is glossy foil, printing plate material, name plate material, etc., minute scratches or slight patterns on the surface cannot be tolerated. Desirable characteristics required for ironing rolls include the following:

(a) The rotational inertia must be small because the rotational speed is high to support the high winding speed. (b) The weight of the roll is light so that the strip surface is not damaged by the impact force generated by the vertical vibration caused by the rotation of the roll. (c) For the reasons mentioned in (b) above, the roll surface must have appropriate compressive elasticity. (d) The surface of the roll and strip should have an appropriate frictional force to prevent stripping, and should not cause surface flaws on the strip even when stripping. (Ho) The roll surface should not be easily worn, damaged or deformed.

Ironing rolls used in conventional ironing methods are generally made of steel or have a steel core lined with rubber or synthetic resin (e.g. urethane resin), and the effective length of the roll is the length of both ends of the roll. It has become common practice for the width of the strip to be larger than the maximum width of the strip to be wound to avoid "scratching" the surface of the strip.

In practice, such ironing rolls have the following drawbacks.

Since the specific gravity is large, even if it is a hollow roll, the rotational inertia and mass inertia are large.

Because the elasticity is low, the roll and coil are close to line contact, and the surface pressure is large, and in the width direction,
The outer surface of the coil generally has a bulging drum shape rather than a cylindrical shape, as shown in FIG. 2, due to the stacking of the mid-height profiles of the strips, and is close to a point contact at the center in the width direction.

Low coefficient of friction.

Rubber and synthetic resin used as lining materials are subject to damage and surface wear due to the strip edge, which is transferred as a pattern to the surface of the strip.

In this way, the properties required for ironing rolls are not fully achieved.

The purpose of this invention is to provide an ironing roll that satisfies the characteristics required of an ironing roll when surface quality is important as mentioned above, and is constructed as follows.

A large number of disc-shaped nonwoven fabric elements with fiber cross sections exposed on the surface were inserted through a roll shaft and compressed by tightening from both sides of the roll shaft.

The ironing roll configured in this way is
The bulk specific gravity is small and the weight of the roll is reduced, the fiber cross section of the non-woven fabric is in contact with the strip, the coefficient of friction is high and wear resistance is high, and appropriate elasticity can be obtained by the degree of compression of the lamination and the selection of the material. The contact pressure between the roll and the strip can be alleviated, and even if a strip is formed between the roll and the strip, surface damage to the strip is extremely slight.

However, a drawback of rolls made of non-woven fabric is that the roll surface is easily damaged by cuts caused by strip edges, and these damaged recesses transfer patterns to the surface of subsequent wide strips.

According to tests conducted by the present inventors, even if the body length of an ironing roll made of non-woven fabric is smaller than the strip width, if the roll body end is chamfered appropriately, the linear pattern at the roll end will not stick to the strip. It was found that the wrinkle suppressing effect is effective if the body length is 1/3 or more of the strip width. Therefore, by making the body length of the ironing roll smaller than the minimum width of the applicable strip and larger than 1/3 of the maximum width, the above disadvantages can be avoided and the weight can be further reduced. become.

This invention will be explained below with reference to FIGS. 3 to 5.

FIG. 3 is a perspective view of the ironing roll of this invention, where 1 is a roll shaft, and a nonwoven fabric element 2 is integrally formed on this roll shaft to constitute an ironing roll made of a nonwoven fabric.

The above-mentioned ironing roll has a fourth ironing roll so that the fiber cross section of the conventionally known nonwoven fabric appears on the surface.
As shown in Figures A and B of the figure, a large number of hollow circular nonwoven fabric elements 2 having hooking parts are inserted into the roll shaft 1, and the elements are mutually connected by tightening them from both sides of the roll shaft. They are compressed and bite into each other to form a single piece.

The shape of the hollow part of the nonwoven fabric element is formed to the shape of the roll shaft where it is attached, for example, round, square, triangular, etc. In the case of a round shaft, the nonwoven fabric element that is attached and has an integral shape rotates. The key is buried to prevent this from happening. Further, the roll shaft is preferably a hollow shaft from the viewpoint of reducing weight.

FIG. 5 is a configuration diagram showing an embodiment of the ironing roll of this invention, in which 1 is a hollow roll shaft, 2 is a nonwoven fabric element, and both ends of this element are flanges 3 provided on the hollow roll shaft.
It is stopped by a sinking key 4 at two places, upper and lower, to prevent the element from rotating. A stepped shaft body 5 is fitted to both ends of a hollow roll shaft 1.

If the ironing roll of this invention is used, the wrinkles in the strip will be removed accurately, damage to the strip surface will be extremely slight, the life of the roll will be longer, and higher speed winding will be possible. bring.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the arrangement of the ironing roll, Fig. 2 is a side explanatory diagram showing the state when the top surface of the coil is pressed with a conventional ironing roll, and Fig. 3 is an explanatory diagram showing the arrangement of the ironing roll.
The figure is a perspective view of the ironing roll of the present invention.
FIGS. 4A and 4B are perspective views of nonwoven fabric elements constituting the roll of the present invention, and FIG. 5 is a sectional view showing one embodiment of the roll of the present invention. Explanation of symbols: 1...Roll shaft, 2...Nonwoven fabric element, 3...Flange, 4...Key.

Claims (1)

[Scope of utility model registration request] A large number of nonwoven fabric elements formed in a disk shape so that the fiber cross section appears on the surface are inserted into the roll shaft, and are installed to press down the outer diameter of the coil wound on the thin metal strip winding machine from the outside. 1. An ironing roll made of a non-woven fabric, which is compressed and tightened, and the length of the roll body is smaller than the minimum width of the strip to which it is applied.