JPH01145985A - Roll made of carbon fiber-reinforced plastic - Google Patents

Abstract

PURPOSE:To hold necessary strength and to provide a light roll made of carbon fiber-reinforced plastic by a method wherein an intermediate layer formed such that orderly arranged carbon fiber sheets are laminated in parallel to and at a cross angle of 45 deg. with a roll shaft, the intermediate layer is sandwiched from the inside and the outside by means of carbon fiber cloths, and the whole is bonded by means of thermosetting resin. CONSTITUTION:The section of a roll body 2 is formed with three layers of an innermost layer 5, an intermediate layer 6, and an outermost layer 7. The innermost layer 5 is formed by laminating prepreg cloths formed by impregnating a carbon fiber cloth with epoxy resin, and the outermost layer 7 is formed in a similar manner described above by laminating prepreg cloths. The intermediate layer 6 is formed with an inner layer part 6a and an outer layer part 6b. The inner layer part 6a is formed such that a prepreg sheet impregnated with epoxy resin is laminated to a carbon fiber sheet, in which carbon fibers are orderly arranged, so that the sheets cross a roll shaft at an angle of + or -45 deg. with the roll shaft. The outer layer part 6b is formed by laminating prepreg sheets in parallel to the roll shaft. This method holds necessary strength and enables provision of a sharply light roll.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a roll made of carbon fiber-reinforced plastic used primarily for unwinding and winding devices for paper, plastic films, and the like.

(Prior Art) Conventionally, rolls of this type are generally made of steel or aluminum alloy because they require a certain level of strength.

(Problems to be Solved by the Invention) Due to their nature, this type of roll is frequently attached and detached from equipment, and the above-mentioned conventional rolls are generally too light to be attached and detached mechanically, so they are generally manually attached and detached. I use this to attach and detach. However, it is too heavy to attach and detach manually, placing an excessive physical burden on the worker and impairing work efficiency.

However, given recent technological trends, it is conceivable to apply reinforced plastic products made of carbon fiber to this type of roll for the purpose of weight reduction, but carbon It is assumed that advanced technology is required to simultaneously satisfy the conflicting elements of strength and weight as with this type of roll.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a carbon fiber-reinforced plastic roll that can be significantly reduced in weight while maintaining the strength required of conventional steel rolls.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a cylindrical roll whose roll body is made of carbon fiber reinforced plastic,
Its cross section consists of three layers: the innermost layer, the middle layer, and the outermost layer,
The innermost layer and the outermost layer are laminated with carbon fiber cloth, and the middle layer is a carbon fiber sheet in which the fibers are aligned in one direction, and the fiber direction is parallel to the roll axis. It is characterized in that it is formed by disposing a first layer and a second layer laminated at an angle of ±45°, and bonding the whole with a thermosetting resin.

(Function) The bending rigidity of the roll is increased by arranging aligned carbon fiber sheets in the intermediate layer parallel to the roll axis, and the sheets are arranged at an intersection angle of ±45° to the roll axis. By arranging carbon fiber cloth in the outermost layer and the innermost layer surrounding the intermediate layer, the bending strength of the roll can be increased and the peeling and fluffing that occur in the carbon fiber sheet can be prevented. In addition, the surface can be finished smoothly even when drilling holes, etc. Furthermore, by bonding these sheets and cloth with a thermosetting resin, the carbon fibers are firmly connected to each other, thereby making it possible to improve the stickiness and surface smoothness of the entire roll.

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

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

With reference to FIGS. 1 and 2, (1) indicates a roll;
The roll (1) has a roll body (2) and a roll body (2).
) Aluminum alloy cap fitted on both ends (3) (3)
After a paper tube serving as a core material for winding is inserted into the outer periphery of the roll (1), it is detachably attached to a winding device (not shown), and a plurality of paper tubes formed on the roll body (2) are attached. A chuck (not shown) is projected from the chuck hole (4) using compressed air to fix the paper tube to the roll body <2), and the paper or plastic film is wound up by rotating the roll (1). .

The cross section of the roll body (2) is as shown in Fig. 1.
5), an intermediate layer (6), and an outermost layer (7), and the innermost layer (5) is a prepreg cloth of 0,3+++n, which is made by impregnating plain weave or satin weave carbon fiber cloth with epoxy resin. Similarly, the outermost layer (7) is formed by laminating 4 turns of the same prepreg cloth.

The intermediate layer (6) is composed of an inner layer (6a) and an outer layer (6b), and the inner layer (6a) is made of carbon fiber sheet made of carbon fibers aligned in one direction and impregnated with epoxy resin. 2+
Prepreg sheets with a thickness of nm are laminated in 6 rolls so as to intersect at an angle of 45° to the roll axis, and on top of that, a prepreg 2 sheet is laminated at an angle of 45° in the “-” direction with the above-mentioned crossing direction as “+”. The prepreg sheets are laminated in 6 turns so as to intersect at an angle, and the outer layer portion (6b) is similarly formed by laminating the prepreg sheets in 24 turns in parallel to the roll axis.

Then, the roll main body (2) constructed as described above is heated to 130° C. for 2 hours to weld the epoxy resin impregnated into each cloth and sheet to form an integrated roll.

As described above, according to this example, when a roll with an inner diameter of 52, an outer shape of 75, and a length of 1600 (□) is formed, the weight is 6.2 kg, and the weight of a roll made of steel with the same shape is 6.2 kg. The weight is approximately 32.5 kg, whereas the weight can be 115 kg.

In this example, the carbon fiber sheet applied to the intermediate layer (6) is
The outer layer portion (6b) is laminated parallel to the roll axis, and the inner layer portion (6a) is laminated so as to intersect the roll axis at an angle of ±45°. This is to strengthen the bending rigidity so that if the roll body (2) is insufficiently rigid, it will bend in the bending direction and the center of the roll body (2) will be swung around during winding and will not be damaged by centrifugal force. .

In addition, as described in the section above, by laminating carbon fiber cloth and sheets so that each layer has its own unique strength characteristics and organically bonding them, it is possible to It is possible to manufacture rolls with the same strength characteristics as those required for rolls.

In this example, a prepreg cloth with a thickness of 0.3 mm and a prepreg sheet with a thickness of 0.2+ nm were laminated in multiple turns, but it goes without saying that the number of turns will vary depending on the thickness of these materials. . In addition, the middle class (
The laminated structure in 6) can also be changed from time to time in terms of ease of manufacture and strength.

(Effects of the Invention) As described above, according to the present invention, there is provided an intermediate layer in which carbon fiber sheets made of aligned rolls are laminated parallel to the roll axis and at an intersection angle of ±45°, and a carbon fiber cloth in which the intermediate layer is laminated at an intersection angle of ±45°. By sandwiching the roll from the inside and outside, it is possible to achieve extreme weight reduction while maintaining the required strength of the roll.In addition, by configuring the outermost layer of the roll with carbon fiber cloth, the outer surface of the roll It has the effect of smoothly forming the

[Brief explanation of the drawing]

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)...Middle layer (7)...Outermost layer

Claims (1)

[Claims] 1. A cylindrical roll whose roll body is made of carbon fiber reinforced plastic, whose cross section is composed of three layers: an innermost layer, an intermediate layer, and an outermost layer. A first layer in which carbon fiber cloth is laminated on the outer layer, and a carbon fiber sheet in which the fibers are aligned in one direction is laminated on the intermediate layer so that the fiber direction is parallel to the roll axis. 1. A roll made of carbon fiber reinforced plastic, characterized in that the second layer is laminated so as to intersect with each other, and the whole is bonded with a thermosetting resin. 2. The carbon fiber reinforced plastic according to claim 1, wherein the first layer is disposed in the outer layer of the intermediate layer, and the second layer is disposed in the inner layer of the intermediate layer. made roll.