JPS6032127Y2 - Rotating body for glass fiber cutting - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating body for cutting glass fibers that can efficiently cut glass fibers.

Currently, various types of rotating bodies with cutting blades have been developed, and various cut glass fiber products are manufactured for industrial materials and other uses using cutting devices that press rollers made of rubber or the like against these rotating bodies. ing.

A rotary body for cutting glass fibers that has been widely used in the past includes a cylindrical rotary roll having a circumferential surface parallel to the rotation axis, and a plurality of blades parallel to the rotation axis. There is a model in which the blades are installed at predetermined intervals, but because the circumferential surface on which the blades are installed is parallel to the circumferential surface of the roll of rubber, etc. that is pressed against the blade, it is difficult to continuously cut the glass fibers. When cutting glass fibers, the cut glass fibers and debris from the glass fiber treatment agent gradually become clogged, and as a result of this clogging, the cutting function deteriorates, and cut glass fibers that are longer than the specified length due to partial cutting mistakes are cut. Because of this, it is necessary to clean the clogged capacity at short intervals.
This has the problem of reduced cutting efficiency.

Known methods to reduce this monthly clogging include blowing compressed air from the outside onto a rotating body with blades installed;
There is a known method to blow away the monthly clogging by discharging compressed air from the bottom surface of the roll (corresponding to the circumferential surface of the rotating roll), but this method cannot completely prevent monthly clogging, and it still causes damage to the surrounding area. It has the disadvantage that fibers scatter and make the working environment extremely bad.

In addition, other known methods to reduce monthly clogging include:
A known method is to use a rotating body for cutting glass fibers that has a high height from the circumferential surface of the rotating roll to the cutting edge. Although there is a tendency for the clogging to improve somewhat, the problem of continuous clogging still occurring and the number of pieces that are not cut to the specified length gradually increasing remains unresolved. .

Recently, the cutting length was 37rr! Glass fiber products with cut lengths of n or less are now required for various industrial materials, etc., but glass fiber products with short cut lengths are prone to clogging during the cutting process. Therefore, in the glass fiber cutting method using the conventional glass fiber cutting rotating body described above, the cutting efficiency is extremely poor, and 3rIr
It is particularly difficult to produce cut glass fiber products of In or less.

The purpose of the present invention is to solve the problems of conventional rotating bodies for cutting glass fibers, and to solve the problems of 3rIr!, which is extremely difficult to manufacture using conventional methods. It is an object of the present invention to provide a novel rotating body for cutting fibers that can easily produce glass fiber products with a cutting length of n or less.

In other words, in a rotary body with cutting blades, in which a plurality of plate-shaped blades are set at predetermined intervals on the circumferential surface of a rotating roll parallel to the rotation axis, with the cutting edges facing outward, the rotating roll on which the plate-shaped blades are installed. The diameter of the cut surface perpendicular to the axis of the blade is greatest at approximately the center of the plate-shaped blade, and it forms a chevron-shaped inclined surface with respect to the rotation axis so that it decreases linearly or hyperbolically toward both ends. A roll made of rubber or the like is brought into pressure contact with the rotary body for cutting glass fiber of the present invention having a circumferential surface as shown in FIG. In the glass fiber cutting method, the clogging material is pushed by the contact pressure between the glass fiber cutting rotating body and a roller made of rubber or the like.
It slides along the inclined surface 1 and moves to the end of the rotating body for glass fiber cutting where no contact pressure is applied, where there are no rubber rolls, and it easily falls off due to centrifugal force, so it is difficult to cause clogging over a period of time and is continuous. It has been found that even when cutting glass fibers in this manner, the cutting function does not deteriorate and the cutting efficiency is extremely high.

The present invention will be explained below with reference to the drawings.

FIG. 1 shows a front view of an example of the rotating body for cutting glass fibers of the present invention, and FIG. 2 shows a side view thereof.

The rotating body for cutting glass fibers of the present invention shown in FIGS. 1 and 2 has a number of plate-shaped blades 3 on the circumferential surface of a rotating roll 1 in parallel to a rotating shaft 2, with cutting edges 4 facing outward. 32 to face
The diameter of the cutting surface perpendicular to the axis of the rotary roll 1 on which the plate-shaped blade 3 is installed is the largest at the center of the plate-shaped blade and decreases linearly toward both ends. It has a circumferential surface that forms a chevron-shaped inclined surface 5 having an inclination angle of 6 degrees with respect to the rotation axis.

Rubber rolls made of urethane rubber are pressed against this rotary body for fiber cutting, and the rotary body for fiber cutting is rotated so that the pressure-welded portion has a thickness of 3,000 tex (in units of thickness, length is 1,0
Means the weight in grams per 00rrL.

) Glass fiber bundles are supplied, and even if continuous cutting work is carried out, no clogging occurs and the cutting function does not deteriorate, so the 3rIr! It was confirmed that almost no glass fibers with a cutting length of n or more were included.

On the other hand, the circumferential surface of the rotating roll is 31rr parallel to the rotating axis! As a result of cutting the same glass fiber bundle as above using a conventional fiber cutting rotating body installed at n intervals, m
It was found that when continuous cutting work was carried out for several minutes, clogging began to occur, and a large amount of glass fibers with cut lengths of 3 mm or more due to cutting errors were included.

The rotating body for cutting glass fiber of the present invention hardly causes clogging even if the plate blades are installed at very close intervals, so the cutting length is short (3rIr!). When producing glass fiber products of n or less, the cutting efficiency can be greatly improved by using the rotating body for cutting glass fibers of the present invention.

In addition, by using the glass fiber cutting rotary body of the present invention, it is possible to cut glass fibers containing moisture that tend to clog over time, glass fibers treated with sticky surface treatment agents, etc. The cutting efficiency can be greatly improved compared to the above method.

The rubber rolls that are pressed against the rotating body for fiber cutting of the present invention include rubber rolls made of conventionally widely used styrene-butadiene rubber, nitrile-butadiene rubber, chloroprene rubber, urethane rubber, etc., and rubber elastic rolls. Rolls made of other materials can also be used.

The rotating body for cutting glass fibers of the present invention is less prone to clogging over a period of time, and its cutting function does not deteriorate over a long period of time, so compared to conventional rotating bodies for cutting glass fibers, cut glass fibers are less damaged, and the glass fibers are less likely to be damaged. It also has the feature that it is possible to provide a high-quality glass fiber product in which the cut glass fiber product contains almost no bead-shaped filament entangled aggregates produced when the fibers are damaged.

[Brief explanation of drawings]

FIG. 1 shows a front view of an example of the rotating body for cutting glass fibers of the present invention. FIG. 2 is a side view of the rotating body for cutting glass fibers shown in FIG. 1. Explanation of symbols, 1...Rotating roll, 2...
・Rotating axis, 3...plate-like blade, 4...cutting edge, 5...chevron-shaped inclined surface.

Claims (1)

[Scope of utility model registration request] A plurality of plate-shaped blades are installed on the circumferential surface of the rotating roll at predetermined intervals parallel to the rotating axis. 1. A rotating body for cutting glass fiber, characterized in that it has a circumferential surface that is large and that forms a chevron-shaped inclined surface with respect to a rotating shaft that becomes smaller linearly or hyperbolically toward both ends of the rotating body.