JPH04343700A - Ultrasonic cutting method - Google Patents

Abstract

PURPOSE:To eliminate abnormal noise and extend the life of a tool horn and an anvil by pinching and cutting an object to be cut between the side face of the tip section of the tool horn and the tip of the anvil. CONSTITUTION:When a teremp is to be cut, a web 5 is fed between web conveying rolls 6, and it is inserted between the tip side face 3a of a tool horn 3 and the tip of an anvil 4. The ultrasonic vibration converted by a converter and amplified by a booster 2 is applied in the direction shown by a reciprocating arrow. Constant tension is applied to the web 5 in the longitudinal direction as shown by an arrow B. Friction heat is generated at the portion of the web 5 pinched by the tip of the anvil 4 and the side face 3a of the tool horn 3, the object to be cut 5 is softened and melted, and the softened and melted portion is cut.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of cutting a strip-shaped object such as a thermoplastic or a thermoplastic material by utilizing heat generated by ultrasonic waves.

0002

2. Description of the Related Art Conventionally, when cutting telescopes and the like using ultrasonic waves, cutting has been carried out in the manner shown in FIGS. 2 and 3. In the figure, 1 is a converter, 2 is a booster,
3 is a tool horn, for example an exponential horn. 4 is an anvil (also called a knife, pedestal, etc.), and the object to be cut 5
is between the tip of the tool horn 3 and the anvil 4,
The cutting was performed using compression heat generated by longitudinal vibration of the tool horn 3.

0003

[Problems to be Solved by the Invention] However, with the above conventional device, the tip of the tool horn repeatedly collides with the blade through the object to be cut due to the longitudinal vibration of the tool horn, resulting in abnormally loud vibration noise during cutting. This not only worsened the working environment, but also caused severe damage to the tool horn and anvil due to the collisions, necessitating frequent replacement.

Therefore, the main object of the present invention is to eliminate the above-mentioned abnormal noise and extend the life of the tool horn and anvil.

[0005]

[Means for Solving the Problems] The above object is a method of performing ultrasonic cutting with a belt-shaped object to be cut sandwiched between a tool horn vibrated by ultrasonic waves and an anvil having a protruding tip, the method comprising: This can be solved by cutting the object by sandwiching it between the side surface of the tip of the tool horn and the tip of the anvil.

[0006]

[Operation] According to the present invention, the object to be cut is sandwiched between the side surface of the tip of the tool horn and the tip of the anvil. Therefore, the object to be cut (hereinafter referred to as web)
Due to the lateral vibration along the surface of the anvil (called lateral vibration because the direction is perpendicular to the longitudinal vibration), frictional heat is generated in the web between the side surface of the tool horn and the tip of the anvil.
The part to be cut can be softened and melted by frictional heat to be cut. Further, in the present invention, the vibration direction of the tool horn does not match the longitudinal direction of the anvil, so that the tip surface of the tool horn does not collide with the anvil tip due to ultrasonic vibration. This eliminates abnormal noises and extends the life of the tool horn and anvil.

[0007]

[Example] Next, the effects of the present invention will be clarified by examples. FIG. 1 shows an example of a device according to the method of the present invention, and the shapes of the ultrasonic vibration generator body (device body consisting of a converter, booster, tool horn, etc.) and anvil are the same as those of the conventional device. In the present invention, FIG.
The anvil 4 is arranged perpendicularly to the longitudinal direction of the tool horn 3, and the web 5 is sandwiched between the tip of the anvil 4 and the side surface 3a of the tool horn 3. In this case, the web 5 as the object to be cut is brought into contact with the side surface 3a of the tool horn and guided between it and the tip of the anvil 4. At this time, in order to intensively generate frictional heat only at the target cutting site of the web 5, it is preferable to provide a web conveyance roll 6 that guides the web 5.

[0008] In order to cut a telescope or the like using such an apparatus, the web 5 is passed between the web conveying rolls 6 and inserted between the tip side surface 3a of the tool horn 3 and the tip of the anvil 4. In this state, ultrasonic vibrations converted by the converter 1 and amplified by the booster 2 are applied in the direction shown by the reciprocating arrow. At this time, a constant tension is applied to the web 5 in the longitudinal direction as indicated by arrow B. As a result, frictional heat is generated in the corresponding part of the web 5 sandwiched between the tip of the anvil 4 and the side surface 3a of the tool horn 3, and the object to be cut 5 is softened and melted by the heat, and the softened and melted part is cut. becomes.

As described above, in the present invention, since the tool horn tip end surface and the anvil tip do not collide as in the conventional case, abnormal noise and damage to the tool horn and anvil are prevented, and the life of the tool horn is significantly extended. By the way, when the method of the present invention is adopted, compared to the conventional example, the noise at a distance of 1 meter was 80 horns and the frequency of replacement was 50 times a year, but the noise was reduced to 30 horns. The frequency of replacement has been reduced to 5 times a year.

As the material of the tool horn in the present invention, conventionally known materials such as duralumin can be used. In addition to the above-mentioned terremp, hard plastics such as polystyrene, polycarbonate, and hard vinyl chloride are suitable for the object to be cut in the present invention. Alternatively, it may have a laminated structure.

The tool horn used in the present invention may have a conical shape, a stepped shape, or the like, in addition to the above-mentioned exponential shape. Also,
The shape of the anvil also does not matter.

0012

As described above, according to the present invention, noise during cutting is reduced and the life of the tool horn and anvil is extended.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing an embodiment of the method of the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a schematic explanatory diagram showing an example of a conventional method.

[Explanation of symbols]

3...Tool horn, 3a...Side surface, 4...Anvil, 5...Object to be cut (web)

Claims (1)

[Claims] 1. A method of ultrasonically cutting a belt-shaped object to be cut between a tool horn that vibrates by ultrasonic waves and an anvil having a protruding tip, the method comprising: An ultrasonic cutting method characterized by cutting by sandwiching the tip between the side surface of the tip and the tip of an anvil.