JPH085591B2 - Carbon fiber reinforced plastic roll - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a carbon fiber reinforced plastic roll mainly used for unwinding and winding a paper, a plastic film or the like.

(Prior Art) A conventional roll of this type is generally made of steel or aluminum alloy because it requires a predetermined strength.

(Problems to be Solved by the Invention) Due to the nature of this type of roll, it is frequently attached and detached from the apparatus. In the conventional rolls described above, it is generally light in weight for mechanical attachment and detachment. I'm trying to put on and take off. However, the attachment / detachment is heavy because of manual labor, which imposes an excessive physical burden on the worker and damages the worker.

However, in view of recent technological trends, it is conceivable to apply a reinforced plastic product made of carbon fiber to this type of roll for the purpose of weight reduction.
It is necessary to apply carbon fiber so as to satisfy the characteristics of the object to be applied, and it is assumed that high technology is required to simultaneously satisfy the contradictory factors of strength and weight like this type of roll. .

In view of the above problems, an object of the present invention is to provide a carbon fiber reinforced plastic roll capable of achieving significant weight reduction while maintaining the strength required for conventional steel products and the like.

(Means for Solving Problems) The present invention is, in order to achieve the above object, a cylindrical roll having a roll main body made of carbon fiber reinforced plastic, the cross section of which has an innermost layer, an intermediate layer, and an outermost layer. The carbon fiber sheet is composed of three layers, and a carbon fiber cloth is laminated on the innermost layer and the outermost layer, and a carbon fiber sheet in which fibers are aligned in one direction is arranged in the intermediate layer, and the fiber direction is parallel to the roll axis. It is characterized in that a first layer laminated so as to form a first layer and a second layer laminated so as to intersect ± 45 ° are arranged, and the whole is bonded with a thermosetting resin.

(Working) The bending rigidity of the roll is increased by arranging the carbon fiber sheets aligned in the middle layer parallel to the roll axis, and
The twist strength can be increased by arranging the sheet at an intersection angle of ± 45 ° with respect to the roll axis, and by arranging carbon fiber cloth in the outermost layer and the innermost layer surrounding the intermediate layer, In addition to increasing the bending strength, the peeling and fuzz generated on the carbon fiber sheet can be prevented, and the surface can be finished smoothly even during processing such as drilling. Furthermore, by bonding these sheets and cloths with a thermosetting resin, the carbon fibers can be firmly connected to each other, and the stickiness and surface smoothness of the entire roll can be achieved.

In addition, by using carbon fiber as the material of the roll, it is possible to achieve a marked weight reduction of the roll as a whole.

(Example) A case where the present invention is applied to an air shaft type roll used in a paper / plastic film winding device will be described.

Referring to FIG. 1 and FIG. 2, (1) indicates a roll, and the roll (1) is made of an aluminum alloy fitted to both outer ends of the roll body (2) and the roll body (2). Base (3)
(3) and after inserting a paper tube as a core material for winding on the outer periphery of the roll (1), it is detachably attached to a winding device (not shown) and formed on the roll body (2). A chuck (not shown) is projected from the plurality of chuck holes (4) by compressed air to fix the paper tube to the roll main body (2), and the roll (1) is rotated to wind the paper or the plastic film. I have to.

The cross section of the roll body (2) is composed of three layers, an innermost layer (5), an intermediate layer (6) and an outermost layer (7) as shown in FIG. 1, and the innermost layer (5) is plain weave or satin. It is composed by stacking 0.3mm prepreg cloth impregnated with epoxy resin on the well-known carbon fiber cloth in the 14th volume, and similarly, the outermost layer (7) is composed by stacking the same prepreg cloth in the 4th volume. .

The intermediate layer (6) is composed of an inner layer portion (6a) and an outer layer portion (6b), and the inner layer portion (6a) is 0.2 mm obtained by impregnating a carbon fiber sheet in which carbon fibers are aligned in one direction with an epoxy resin. Thick prepreg sheets are laminated in 6 rolls so that they intersect with the roll axis at an angle of 45 °, and the prepreg sheet is crossed at an angle of 45 ° in the “−” direction with the cross direction as “+”. The outer layer portion (6b) has the prepreg sheet parallel to the roll axis.
It is composed of 24 rolls.

Then, the roll body (2) configured as described above is welded at a temperature of 130 ° C. for 2 hours with the epoxy resins impregnated in each cloth and sheet to form an integrated roll.

As described above, according to this embodiment, for example, the inner diameter 52, the outer mold
When forming a roll with a length of 75 and a length of 1600 _(mm) , the weight is 6.
The weight is 2 kg, and the weight of the steel roll having the same shape is about 32.5 kg, while the weight can be reduced to 1/5.

In this embodiment, the carbon fiber sheets to be applied to the intermediate layer (6) are laminated in the outer layer portion (6b) parallel to the roll axis, and in the inner layer portion (6a) so as to intersect the roll axis at an angle of ± 45 °. Are stacked on top of each other. This is because when the roll body (2) has insufficient rigidity, bending occurs in the bending direction, the center of the roll body (2) is swung during winding, and the bending rigidity is enhanced so as not to be damaged by centrifugal force. .

Further, as described in the section of the above action, by laminating carbon fiber cloth and sheet so that each layer has a unique strength characteristic, and organically bonding these, conventional steel or aluminum alloy It is possible to manufacture a roll having the same strength characteristics as those required for the roll.

In this example, a plurality of prepreg cloths having a thickness of 0.3 mm and a prepreg sheet having a thickness of 0.2 mm were laminated, but it goes without saying that the number of windings will be different if the thicknesses of these materials are different. Further, the laminated structure of the intermediate layer (6) can be changed sequentially in view of ease of manufacture and strength.

(Effect of the invention) As described above, according to the present invention, a carbon fiber sheet in which rolls are aligned is laminated at a crossing angle of ± 45 ° parallel to the roll axis and a carbon fiber cloth. By sandwiching the roll from inside and outside, it is possible to achieve extreme weight reduction while maintaining the strength required for the roll, and by configuring the outermost layer of the roll with carbon fiber cloth, the outer surface of the roll Has the effect of being able to form smoothly.

[Brief description of drawings]

FIG. 1 is a cutaway side view of one embodiment of the present invention, and FIG. 2 is a perspective view of a roll. (1) …… Roll, (2) …… Roll body (5) …… Innermost layer, (6) …… Intermediate layer (7) …… Outermost layer

Claims (2)

[Claims] 1. A cylindrical roll whose main body is made of carbon fiber reinforced plastic, the cross section of which is made up of three layers of an innermost layer, an intermediate layer and an outermost layer, wherein the innermost layer and the outermost layer are formed. A carbon fiber cloth is laminated and arranged, and a carbon fiber sheet in which fibers are aligned in one direction in the intermediate layer is laminated so that the fiber direction is parallel to the roll axis and intersects ± 45 °. The carbon fiber reinforced plastic roll is characterized in that it is formed by arranging the second layer laminated as described above and bonding the whole with a thermosetting resin. 2. The carbon according to claim 1, wherein the first layer is arranged in an outer layer portion of the intermediate layer and the second layer is arranged in an inner layer portion of the intermediate layer. Fiber reinforced plastic roll.