JPH0627093U - Cutter for cutting glass fiber - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the durability of contact rolls. [Structure] The radius of curvature r of the cutting edge of the blade 3 of the cutter roll 2 facing the contact roll 6 is set to 3 μm or more. [Effect] Since the blade edge is more rounded than before, the blade does not bite on the rubber surface of the contact roll, and the life of the contact roll is extended. Further, since the rubber material of the contact roll may be the same as the conventional one, abrasion of the blade tip is also prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a glass fiber cutting cutter, and more particularly to improvement of the blade edge.

[0002]

[Prior art]

 As shown in FIGS. 3 to 4, the cutter for cutting the glass fiber has blades 3 fixed to a cutter roll 2 mounted on a drive shaft 1, and spacers 4 are positioned between the blades 3 to cut the blades. Fix it to the cutter roll 2 and keep the distance between the cutter blades 3. Then, a hard rubber contact roll 6 rotatably mounted on the support shaft 5 at an appropriate distance from the cutter roll 2 is installed, and a thread pressing roll 7 is provided above the rolls 2 and 6 to provide a glass fiber. 8 was cut.

[0003]

[Problems to be solved by the device]

 In a conventional glass fiber cutting cutter, the blade tip of the blade 3 is extremely sharp as shown in FIG.

When the blade edge is sharp as described above, there is a problem that the blade edge bites into the outer peripheral surface of the contact roll, innumerable scratches are made on the surface of the contact roll, and the contact roll is cut into pieces and cut off.

Although scratches can be reduced by increasing the hardness of the rubber of the contact roll, on the contrary, the blade is easily worn and the durability of the blade is deteriorated.

[0006]

[Means for Solving the Problems]

 The cutter for cutting glass fiber of the present invention comprises a contact roll having an outer peripheral surface made of rubber, and a cutter roll facing the contact roller. A plurality of blades are provided on the outer peripheral surface of the cutter roll. In a glass fiber cutting cutter protruding in a predetermined direction in the direction, the curvature radius of the blade edge of the blade is set to be larger than 3 μm.

[0007]

[Action]

 In the glass fiber cutting cutter of the present invention, the blade tip is more rounded than before, so that the blade does not bite on the rubber surface of the contact roll and the life of the contact roll is extended. Further, since the rubber material of the contact roll may be the same as the conventional one, abrasion of the blade edge of the blade is also prevented.

[0008]

【Example】

 FIG. 1 is an enlarged cross-sectional view of a blade edge portion of a glass fiber cutting cutter according to an embodiment.

In this embodiment, the radius of curvature r of the cutting edge of the blade 3 is 5 μm. By increasing the radius of curvature r in this way, it is possible to prevent the blade from biting the rubber surface of the contact roll.

When the blade was made of iron and the curvature radius r was variously changed, the contact roller surface durability time (life when the glass fiber cutting cutter was continuously operated) was measured. there were.

[0011]

[Table 1]

From the above experiment, it is clear that the durability of the contact roll is remarkably improved by making the radius of curvature r to be 3 μm or more and rounding the blade edge.

When the radius of curvature r is 20 μm or more, the sharpness of the blade becomes dull, so the radius of curvature r is preferably 3 to 20 μm.

[0014]

[Effect of device]

 As described above, since the blade edge of the glass fiber cutting cutter of the present invention is more rounded than before, the blade does not bite on the rubber surface of the contact roll and the life of the contact roll is reduced. Extends. Further, since the rubber material of the contact roll may be the same as the conventional one, abrasion of the blade edge is prevented. Therefore, it is possible to continuously operate the glass fiber cutting cutter for a very long period of time without replacing the contact roller or the blade.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a cutting edge of a blade according to an embodiment.

FIG. 2 is an enlarged cross-sectional view of a cutting edge of a blade according to a conventional example.

FIG. 3 is a perspective view of a glass fiber cutting cutter.

FIG. 4 is a cross-sectional view of a cutter roll.

[Explanation of symbols]

 2 Cutter roll 3 Blade 6 Contact roll 8 Glass fiber

Claims (1)

[Scope of utility model registration request] 1. A contact roll having an outer peripheral surface made of rubber and a cutter roll facing the contact roll, wherein a plurality of blades are provided on the outer peripheral surface of the cutter roll at predetermined intervals in the circumferential direction of the cutter roll. A cutter for cutting glass fibers, wherein the curvature radius of the blade tip of the blade is set to be larger than 3 μm.