JPH0230489A - Method and device for cutting film like body - Google Patents

Abstract

PURPOSE:To cut a cutting work with good efficiency by moving the cutting tool set up by its intrusion by making it in a reverse traveling direction by advancing and retreating continuously in the intrusion direction to the film like body traveling in the longitudinal direction. CONSTITUTION:A film like body 5 consisting of a polyester film is traveled in the longitudinal direction (arrow mark A direction) by rotating a delivery roll 6 and winding roll 7 by a driving device. A pinion 3 is controlled by its driving in this state, a rack 4b biting with this pinion 3 is moved along a support part 2 and the cutting tool 4 intruded into the film like body 5 with its blade part 4a in the reverse traveling direction is moved by advancing and retreating continuously in this intrusion direction. As a result, the life of the blade part 4a can be extended and the film like body 5 can be cut with good efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Applications) The present invention relates to a method for continuously cutting a so-called membrane-like material (such as a film or sheet) in the longitudinal direction, and an improvement in the device thereof. be.

(Prior art) Conventionally, it has been used to continuously cut so-called film-like materials or thin plate-like materials (hereinafter referred to as "film-like materials") such as plastic films, cellophane, laminates, paper, plastic sheets, metal foils, etc. In general, the laser cutting method using a knife, the sawtooth cutting method, the shear cutting method using shear cutting, and the non-contact cutting method using laser, plasma, etc., have been put into practical use.

Among the above-mentioned methods, an example of the one-method laser cutting method using a knife related to this patent will be outlined based on FIGS. 2 and 3.
is a film-like material such as a plastic film stretched between the unwinding roll 6 and the winding roll 7;
, in the longitudinal direction (arrow A in the figure) by the rotation of the winding roll 7.
(indicated by ). Reference numeral 4 denotes a knife which is inserted into a predetermined part of the stretched portion of the membrane-like material 5 with the blade portion 4a facing in the direction opposite to the traveling direction, and the membrane-like material 5 is cut by the knife 4 in the traveling direction. (8 in the figure is a cutting line) (Problems to be Solved by the Invention) However, the above cutting method using a knife has the following problems.

First, since the blade 4 penetrates and is fixed at a predetermined location of the membrane-like material 5, the membrane-like material 5 always comes into contact with the same location of the blade portion 4a of the knife 4 during cutting, and therefore, as the cutting progresses, the blade 4 is fixed. The portion 4a is partially worn and the sharpness deteriorates, and the precision of the cut surface of the film-like object is significantly reduced, making replacement and management of the blade 4 extremely complicated. In addition, when cutting a glue-coated film-like object coated with glue, the glue migrates and adheres to the cut portion of the blade 4a, which deteriorates the sharpness of the blade 4a even more than in the above case, reducing the product value. decline is unavoidable.

The above-mentioned problems occur because the part of the blade that contributes to cutting is fixed, so conventionally it has been difficult to predict the cutting length of the film-like material until the above-mentioned problems occur. This problem has been solved by replacing the blade 4 or discontinuously moving the cutting location of the blade 4a before the predicted cutting length is reached.

However, the above method has problems such as a decrease in work efficiency due to the difficulty in predicting the above, and the complexity of updating or moving the cutlery.
This was undesirable due to many problems such as increased labor costs and waste of cutlery due to discontinuous movement.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a method and apparatus for cutting a membrane-like material without the above-mentioned drawbacks.

(Means for Solving the Problems) As shown in FIG. 1, the method for cutting a film-like material according to the first aspect of the invention is to cut a film-like material 5 traveling in the longitudinal direction (indicated by arrow A in the figure) with a blade. The cutter 4 is inserted with the part 4a in the reverse running direction,
It was made to continuously move forward and backward in the penetration direction (indicated by arrow B in the figure).

In addition, the film-like material cutting device of the second invention has a film-like material 5 stretched thereon, and an unwinding roll 6 that runs the film-like material 5 in the longitudinal direction (indicated by arrow A in the figure) and a winding roll. The cutter 4 is inserted into a predetermined position between the roll 7 and the film-like material 5 to be stretched, with the cutter 4a running in the opposite direction, and the cutter 4 is continuously moved forward and backward in the penetration direction (as indicated by arrow B in the figure). It consists of a blade attachment device 1 that can be used (as shown).

(Function) When cutting a membrane-like material, cutting is performed by the entire blade portion of the knife. In other words, the entire blade contributes to cutting.

(Example) Hereinafter, the apparatus and working method used in the present invention will be explained with reference to FIG. In the figure, 5 is a film-like material made of a polyester film with a thickness of 25 μm 11 stretched between an unwinding roll 6 and a winding roll 7, and the unwinding roll 6 and the winding roll 7 are not shown in the diagram. The film-like material 5 is rotated by a drive device such as a motor, and this rotation causes the film-like material 5 to rotate approximately 5 times.
It travels in the longitudinal direction (indicated by arrow A in the figure) at a speed of 0 m/min. Reference numeral 1 denotes a blade attachment device provided on the upper blade of the foil at a predetermined position of the membrane-like material 5 to be stretched, and a rack provided above the blade 4 that penetrates into the film-like material 5 with the blade portion 4a in the reverse running direction. 4
The rack 4b is made up of a support portion 2 to which the rack 4b is slidably attached, a pinion 3 that engages with the rack 4b, and a drive controller for the pinion 3 (not shown).

With the above configuration, the cutter 4 is approximately 2r in the direction of penetration of the film-like material 5.
Continuously moves at a speed of rvn 1 minute, the length between the top and bottom is about 1
A so-called reciprocating motion is possible in which the direction of movement is automatically switched alternately at both ends of the blade portion 4a of 0100rI.

The cutting operation is carried out by moving the membrane material 5 in the longitudinal direction and continuously moving the blade 4 penetrating the membrane material 5 back and forth using the pinion 3 and the rack 4b.

(Effects) The effects of the present invention are as follows. In other words, conventionally, when cutting a polyester film with a thickness of 25 μm, the effective cutting distance without causing any defects was limited to 500 to 700 m, and the cutter had to be moved about 10 M in this straight line or replaced with a new cutter. In the case of the present invention, even if cutting is performed under the same conditions as described above, no problem occurs even if the cutting amount is 10,000 m or more, and therefore, cutting can be performed efficiently and cost-effectively.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an apparatus and cutting method used in the present invention, and FIGS. 2 and 3 are explanatory diagrams of a conventional cutting method. Explanation of symbols 1 Blade attachment device 2 Support part 3 Pinion 4 Blade 4a Blade part 5 Membrane material 6 Unwinding roll 7 Winding roll 8
・Cutting line

Claims (1)

[Claims] 1. Cutting of a membrane-like object, which is characterized by continuously moving forward and backward in the penetrating direction a blade installed in a membrane-like object running in the longitudinal direction with the blade part in the opposite direction of travel. Method. 2. A film-like material is stretched, an unwinding roll and a take-up roll that run the film-like material in the longitudinal direction, and a cutter with the blade part running in the opposite direction at a predetermined position of the film-like material to be stretched. Penetratingly installed,
A device for cutting a membrane-like material, comprising a blade attachment device that can continuously move the blade forward and backward in the penetration direction.