JPH05331430A - Production of adhesive sheet - Google Patents

Abstract

PURPOSE:To prevent the damage of punching blades by removing metal foreigners falling on the adhesive sheet. CONSTITUTION:A magnet M is set on the upper stream side of the puncher 4 for punching the adhesive sheet 10 having the separator 13, the adhesive 12 and the substrate 11 laminated in order into a prescribed shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive sheet manufacturing apparatus.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a support 11 such as a polyethylene foam, an adhesive 12 and a separator 13 such as a polyethylene terephthalate film.
There is known a pressure-sensitive adhesive sheet 10 formed by sequentially stacking the above.

In order to manufacture this adhesive sheet 10, FIG.
The manufacturing apparatus 1 shown in FIG. This manufacturing device 1
Is a coating device 2 for coating the pressure sensitive adhesive 12 on the separator 13.
A laminating roll 3 for laminating the support 11 on the side of the adhesive 12 coated on the separator 13, and an adhesive sheet 10 in which the separator 13, the adhesive 12 and the support 11 are laminated in this order by the laminating roll 3. It is composed of a punching device 4 for punching in the size of.

The coating device 2 comprises a rotating base roll 5
And a comma roll 6 in which a comma knife 6a is arranged with a clearance corresponding to the thickness of the adhesive 12 applied from the surface of the separator 13 wound around the base roll 5.
And the butt 7 of the adhesive 12 arranged adjacent to the base roll 5, and the separator 13 forms the reservoir of the adhesive 12 formed by the cylindrical surface of the base roll 5 and the cylindrical surface of the comma roll 6 by the separator 13 The adhesive 12 is applied to the surface of the separator 13 when it is wound around and passed through 5, and its thickness is controlled to be constant by the comma knife 6 a of the comma roll 6. Further, the laminating roll 3 is arranged adjacent to the base roll 5, and cooperates with the base roll 5 to attach the support 1 to the pressure-sensitive adhesive 12 side applied to the separator 13.
1 is laminated, while the punching device 4 comprises a rotary die 8 having a punching blade 8a and an anvil 9,
As the rotary die 8 rotates, the traveling adhesive sheet 10 is continuously punched out into a predetermined shape with the anvil 9 by the punching blade 8a to commercialize it.

[0005]

By the way, the support 1
When supplying the pressure-sensitive adhesive sheet 10 in which 1, the pressure-sensitive adhesive 12 and the separator 13 are sequentially laminated to the punching device 4, metal foreign matter j such as screws, screws or tools due to mechanical vibration or the like.
May fall onto the pressure-sensitive adhesive sheet 10, and when the pressure-sensitive adhesive sheet 10 is punched by the punching device 4 with these metal foreign matters j placed thereon, there is a problem that the punching blade 8a is damaged.

The present invention has been made in view of the above problems, and provides a pressure-sensitive adhesive sheet manufacturing apparatus capable of reliably removing a metal foreign matter even if the metal foreign matter falls on the pressure-sensitive adhesive sheet. To do.

[0007]

DISCLOSURE OF THE INVENTION The present invention is a punching device for punching a traveling adhesive sheet into a predetermined shape, and a magnetic body is arranged on the upstream side of the punching device and above the adhesive sheet. It is characterized by that.

[0008]

When the adhesive sheet is supplied to the punching device, even if the metallic foreign substance falls on it, the magnetic foreign substance disposed on the upstream side of the punching device sucks and removes the metallic foreign substance. .

As a result, it is possible to reliably prevent the punching blade in the punching device from being damaged by the foreign metal.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

The same components as those of the manufacturing apparatus 1 shown in FIG. 2 are designated by the same reference numerals, and detailed description thereof will be omitted to avoid duplication.

FIG. 1 shows a manufacturing apparatus 1A of the present invention. In this manufacturing apparatus 1A, it is located on the upstream side of the punching apparatus 4 and above the adhesive sheet 10 to be supplied. The magnetic body M is arranged.

Therefore, even if the metallic foreign matter j such as a screw falls on the adhesive sheet 10 due to mechanical vibration or the like, the metallic foreign matter j is sucked by the magnetic body M in the preceding stage of the punching device 4 and is removed from the adhesive sheet 10. To be removed. As a result, it is possible to reliably prevent the punching blade 8a of the rotary die 8 in the punching device 4 from being damaged by the foreign metal j.

Specifically, a polyethylene terephthalate film 13 having a thickness of 100 μm is laminated on a polyethylene foam 11 having a thickness of 2 mm with an adhesive 12 interposed therebetween, and a width of 250 is obtained.
mm adhesive sheet 10 is formed, width 200 mm, length 1
Punch into a 00 mm square to commercialize. Then, it is located on the upstream side of the punching device 4 and has a length 200 of the same width as the punched product.
A 20 mm square rod-shaped magnetic material M was placed 10 mm above the surface of the adhesive sheet 10.

When the pressure-sensitive adhesive sheet 10 was supplied at a speed of 15 m / min and at a speed of 20 m / min, it was possible to suck and remove the metallic foreign matter j weighing 1 g and 500 g.

Further, the same magnetic material M is applied to the adhesive sheet 10.
Even when the adhesive sheet 10 is arranged 20 mm above the surface, the case where the supply speed of the adhesive sheet 10 is 15 m / min
Weight of 1 g and weight of 50 in each case of 0 m
It was possible to suck and remove 0 g of the metal foreign matter j.

In this embodiment, the punching device 4 is composed of the rotary die 8 and the anvil 9, but FIG.
In place of the rotary die 8, a reciprocating die 80 having a punching blade 8a that reciprocates may be used as shown in FIG.

Further, in this embodiment, the coating device 2 is exemplified by the comma coater, but it may be a knife coater, and the structure thereof is not limited.

[0019]

As described above, according to the present invention, the magnetic foreign matter is arranged on the upstream side of the punching device and above the adhesive sheet, so that the metallic foreign matter falls on the adhesive sheet. However, it can be removed by the magnetic material, and damage to the punching blade of the die in the punching device can be reliably prevented.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an outline of an adhesive sheet manufacturing apparatus of the present invention.

FIG. 2 is an explanatory diagram showing an outline of a conventional pressure-sensitive adhesive sheet manufacturing apparatus.

FIG. 3 is a cross-sectional view of an adhesive sheet.

FIG. 4 is a side view showing a reciprocating die.

[Explanation of symbols]

 1 Manufacturing Device 2 Coating Device 3 Laminating Roll 4 Punching Device 5 Base Roll 6 Comma Roll 8 Rotary Die 8a Punching Blade 10 Adhesive Sheet 11 Support 12 Adhesive 13 Separator M Magnetic Material j Metal Foreign Material

Claims (1)

[Claims] 1. A punching device for punching a running adhesive sheet into a predetermined shape, wherein a magnetic material is arranged upstream of the punching device and above the adhesive sheet. Manufacturing equipment.