JPH0655532A - Laser cutting method in extruder - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The conventional defects are eliminated, noise is low, cleaning is unnecessary, soft materials can be cut, and the cut pieces due to the passage of time and material changes The purpose is to realize a cutting method in an extruder with few irregularities. [Structure] A laser beam is exercised and irradiated orthogonally to the direction of movement of an extruded plasticized resin, and cut pieces are scattered by a jet fluid from a fluid source 7.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for cutting a plasticized resin of an extruder.

[0002]

2. Description of the Related Art Cutting is performed by using a milling machine tool.

Noise is loud, cleaning is required, it is difficult to cut soft resin, and the shape of the cut pieces becomes uneven due to the dirt of the blade with the passage of cutting time. The size of the cut pieces varies depending on the nature of the resin. There are drawbacks such as doing.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to realize a cutting method in an extruder which eliminates the conventional drawbacks.

[0005]

A plasticized resin extruded from an extruder is cut by a laser into cut pieces. At this time, a laser beam is exercised and irradiated substantially orthogonally to the movement direction of the plasticized resin, and the cut pieces are scattered by the jet fluid from the fluid source. The problem was solved in this way.

[0005]

EXAMPLES Examples will be described with reference to the drawings.

Conventionally, there are a center cut and a side cut.

[0007]

[Figure 1]

FIG. 2 is an embodiment corresponding to a center cut. The resin is extruded from the die 1 along the circumference into a cord-shaped body 2. A laser beam 4 is emitted from a rotating laser source 3 at the center of the circumference. The laser beam 4 moves substantially orthogonally to the extrusion movement direction of the resin to irradiate the resin. By this irradiation, the rotating laser beam 4 sequentially cuts the cord-shaped body 2 to form cut pieces 5.

[0008]

[Fig. 3]

FIG. 4 is an example corresponding to a side cut. The string-like body 6 advances substantially in parallel on the horizontal plane. Similarly to the center cut, the string-like body 6 is successively cut by the rotating laser beam 4 to form the cut pieces 5.

The cutting piece 5 is formed by the jet fluid from the fluid source 7.
It may be better to scatter. The fluid may be air or water.

The size of the cut piece 5 is determined by the speed of the cord-like bodies 2 and 6 and the speed of the laser beam 4.

Since a laser beam generator is known, its description is omitted.

[0012]

As described above, the effects of the present invention are as follows.

Since the present invention is laser cut, it produces less noise and does not require cleaning. It is easy to cut soft material, there is no unevenness of cut pieces due to blade dirt, and there is little difference in cut piece size depending on the type of resin.

As described above, according to the present invention, it is possible to realize the conventional cutting method in the extruder in which the drawbacks are eliminated.

[Brief description of drawings]

FIG. 1 is a front view of a center cut method.

FIG. 2 is a side view of the center cut method.

FIG. 3 is a front view of a side cut method.

FIG. 4 is a side view of a side cut method.

[Explanation of symbols]

 1 Die 2, 6 String 3 Rotating laser source 4 Laser beam 5 Cut piece 7 Fluid source

Claims (3)

[Claims] 1. A laser cutting method in an extruder, which comprises cutting a plasticized resin extruded from the extruder with a laser to obtain cut pieces. 2. A laser cutting method in an extruder according to claim 1, wherein the laser beam is radiated to the plasticizing resin in a motion substantially orthogonal to the moving direction of the plasticized resin when the laser cutting is performed. 3. A laser cutting method in an extruder according to claim 1, wherein the cut pieces are scattered by a jet fluid from a fluid source.