JPH0557675A - Long roll goods cutting device - Google Patents

Abstract

PURPOSE:To provide a long roll goods cutting device capable of cutting long roll goods efficiently while preventing the generation of defective cut faces. CONSTITUTION:A long roll goods cutting device is provided with a tool rest 3 with a cutter 2 fitted thereto, and a feeder for advancing/retreating the tool rest 3 by a ball screw 4. The feeder is provided with a holding device 8 for holding the rotational torque of the ball screw 4 approximately constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting a long roll product such as an industrial adhesive tape which can be cut into a strip shape.

[0002]

2. Description of the Related Art Adhesive tapes such as industrial adhesive tapes are longly wound on a wide roll and then cut into a small width in a sliced form.

FIG. 2 shows a conventional device for cutting a long roll product, which cuts the adhesive tape wound long on this wide roll into a small width in a sliced manner, where 1 is a long roll. The adhesive tape 10 is a paper core, 10 is a paper core, 2 is a blade, and 3 is a tool rest.

Reference numeral 4 is the front and rear of the tool rest 3 (in the direction of the arrow in FIG. 2).
A ball screw 5 for advancing and retracting the blade 2 against the adhesive tape 1 by pressure, 5 is a sprocket, 6 is a chain, and 7 is a motor.

The rotation of the motor 7 is transmitted to the ball screw 4 via the sprocket 5 and the chain 6, and the ball screw 4
The tool post 3 is moved forward and backward by the rotation of the tool, the rotating tool 2 attached to the tool post 3 is pressed against the adhesive tape 1, and the wide adhesive tape 1 is cut into a small width in a sliced manner. ..

[0006]

However, in the above-described conventional apparatus for cutting a long roll product, the rotation speed of the motor is constant, so that the rotation speed of the ball screw is constant. Therefore, the cutter attached to the ball screw is fixed. The feeding speed of the table was always constant during the cutting work. Therefore, the blade was always pressed against the adhesive tape at a constant feed rate regardless of the cutting resistance of the adhesive tape.

For this reason, if the cutting area of the adhesive tape that hits the blade changes and the cutting area of the adhesive tape that hits the blade increases, the cutting resistance of the adhesive tape increases and the force required for cutting increases, resulting in unreasonable cutting and the cut surface is roughened. , Fusing, annual whiskers, etc. had occurred.

In order to avoid this, when the reduction ratio is increased and the feeding speed is reduced, the cutting resistance of the adhesive tape is reduced to prevent the occurrence of defects, but the feeding speed is constant. Therefore, there is a problem that the cutting time becomes long.

In view of the above points, an object of the present invention is to provide a long roll product cutting device capable of preventing the occurrence of defective cut surfaces and efficiently cutting long roll products. ..

[0010]

SUMMARY OF THE INVENTION The present invention comprises a tool rest to which a tool is attached and a ball screw feed device for advancing and retracting the tool rest, and the feed device is provided with a rotary torque of the ball screw. It is characterized in that it is provided with a holding device for holding it substantially constant.

As a device for keeping the rotating torque of the ball screw substantially constant, an electromagnetic powder clutch, a fluid clutch,
A constant torque motor, vector inverter, etc. are used.

[0012]

The rotating torque of the ball screw for advancing and retracting the tool rest to which the tool is attached is held substantially constant by the holding device for holding the rotating torque substantially constant, and the tool rest is fed with a constant feed force.

Thus, the feed rate of the tool rest is adjusted according to the cutting resistance of the long roll product, and the long roll product is cut with a constant cutting load.

[0014]

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view of a long roll product cutting device of the present invention.

Reference numeral 1 is a long roll adhesive tape, 10 is a paper core thereof, 2 is a knife, and 3 is a tool rest. 4 is a ball screw which is a feed mechanism for advancing and retracting the tool rest 3 forward and backward (in the direction of the arrow in FIG. 1) to press the tool 2 against the long roll winding adhesive tape 1, 5 is a sprocket, 6 is a chain, and 7 is It is a motor.

Reference numeral 8 is an electromagnetic powder clutch for keeping the rotation torque of the ball screw 4 which is a feed mechanism substantially constant, and reference numeral 9 is a setting device capable of arbitrarily setting the rotation torque. The rotation torque of the ball screw 4 is arbitrarily set by the setting device 9 according to the product type, size, etc. of the product.

In this embodiment, the long roll adhesive tape 1 has a product diameter of 150 to 500 mm and a paper core diameter of 3 in. The rotation of the motor 7 is controlled by the ball screw 4 through the sprocket 5, the chain 6, and the electromagnetic powder clutch 8.
And the tool rest 3 is moved forward and backward by the rotation of the ball screw 4 in front of and behind the long roll adhesive tape 1. The rotating blade 2 attached to the tool rest 3 by the forward / backward movement of the tool rest 3 is pressed against the long roll adhesive tape 1 to make the wide long roll adhesive tape 1 into a small-width-sized slice. Be disconnected.

At this time, since the rotating torque of the ball screw 4 is kept constant by the electromagnetic powder clutch 8,
The tool rest 3 attached to the ball screw 4 is sent with a substantially constant feed force, whereby the tool 2 attached to the tool rest 3 is pressed against the long roll product 1 with a substantially constant feed force. When the cutting resistance of the long roll product 1 is large, the feed speed of the tool post 3 is low, and when the cutting resistance is small, the feed speed of the tool post 3 is high, so that the long roll product 1 has a constant cutting load. Be disconnected.

The tool rest 3 can also be moved in the width direction of the long roll product 1 by a mechanism (not shown).

[0020]

The rotation torque of the ball screw for advancing / retracting the tool rest to which the tool is attached is kept substantially constant, and the tool rest is fed with a constant feed force, so that long roll products are cut from the start of cutting. It is cut with a constant cutting load until the end, and the tool post is fed at an appropriate feed speed according to the cutting resistance of the long roll product, which prevents defects on the cut surface and the long roll product. Can be cut efficiently.

[Brief description of drawings]

FIG. 1 is an explanatory view of a long roll product cutting device of the present invention.

FIG. 2 is an explanatory view of a conventional device for cutting a long roll product.

[Explanation of symbols]

 1 Long roll adhesive tape 2 Cutlery 3 Turret 3 Ball screw 5 Sprocket 6 Chain 7 Motor 8 Electromagnetic powder clutch 9 Setting device 10 Paper core

Claims (1)

[Claims] 1. A tool post having a tool attached thereto, and a feed device using a ball screw for advancing and retracting the tool post. The feed device includes a holding device for holding a rotational torque of the ball screw substantially constant. A device for cutting long rolls, which is provided.