JPH05228668A - Method for cutting base sheet with mount - Google Patents

Abstract

PURPOSE:To provide a method for cutting a base sheet with a mount that only the base sheet can be cut using a laser beam leaving the mount. CONSTITUTION:In the method for cutting the base sheet with the mount that the base sheet 2 is cut by radiating the laser beam to the base sheet with the mount which consists of the mount 1 and the base sheet 2 which is freely peelable from this mount 1, plural laser beams are radiated as they are closely arranged and plural places are cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting method for cutting only a base sheet used as a label or an adhesive sheet from a base sheet having a mount.

[0002]

2. Description of the Related Art Conventionally, only a base material sheet from a base material sheet with a mount is cut by a laser beam and used as a label or an adhesive material sheet.
The technique of Japanese Patent No. 82 is known. According to this conventional technique, a metal plate such as aluminum is used as a mount, and a laser beam is irradiated to prevent the mount from being cut, and only the base sheet is laser-cut.

[0003]

However, in the conventional technique, delicate control of the laser output is required in order to cut only the base sheet, and if the base sheet is not cut reliably, the releasability is poor. Furthermore, when a metal such as aluminum is used for the mount, there is a problem that the weight becomes large when the material is supplied in a roll shape. The present invention has been made to solve such a problem, and an object thereof is to provide a method for cutting a base sheet with a mount, which can cut only the base sheet with a laser while leaving the mount. Especially.

[0004]

In order to achieve the above object, the present invention firstly irradiates a base material sheet with a mount, which is composed of a mount material and a base material sheet which can be separated from the mount material, with laser light. A method of cutting a base sheet with a mount, which cuts a base sheet, is characterized in that a plurality of laser beams are radiated while being close to each other. Secondly, the irradiation position of the laser light is partially close to the irradiation. Thirdly, it is characterized in that the irradiation positions of the laser light are made to partially intersect with each other. Fourthly, the irradiation position of the laser light is intersected a plurality of times to perform irradiation. Fifthly, it is characterized in that laser lights having different focal points are used. Sixth, a laser beam having a large central laser beam mode and a small circular laser beam mode is used.

[0005]

In the cutting method having the above-described structure, the plurality of laser beams are irradiated in close proximity to each other to cut the plurality of portions of the base sheet,
Since at least one position is surely cut, the reliability of cutting is increased and the releasability of the base sheet is improved.
Further, by irradiating the irradiation position of the laser light so that the irradiation position is partially close to, intersects, or intersects a plurality of times, a plurality of portions of the base sheet are partially cut, so that the cutting reliability is improved and the base sheet is cut. The peelability of can be improved. Further, by irradiating laser light having a different focus or laser light in a wine cup shape, cutting and heat treatment can be performed at the same time, and the heat treatment improves the peelability of the base sheet by forming the cut portion into a bead shape.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an apparatus for cutting only a base material sheet from a roll-shaped base material sheet with a mount, and the base material sheet with a mount 10 is stretched between a supply roll 20 and a winding roll 30. A laser cutting device 40 is provided in the middle of these two rolls 20 and 30 so that only the base sheet 2 can be cut and peeled from the mount 1 by laser energy. As the mount 1, for example, paper is used, but it is not limited to this.

[Embodiment 1] This embodiment is characterized in that a plurality of laser beams are irradiated close to each other. That is, as shown in FIG. 2A, a condenser lens 3 is arranged above the base material sheet 2, and the condenser lens 3 divides the laser light into two and condenses the laser light. As described above, the base material sheet 2 is cut along two cutting lines C and C ′ that are close to each other. As a result, even if one of the cutting lines C and C ′ is an incomplete cutting, the cutting is performed at the other cutting line, so that the cutting reliability is improved.

[Embodiment 2] This embodiment is characterized in that when a plurality of laser beams are irradiated in close proximity to each other, the irradiation positions of the laser lights are partially moved in close proximity to each other. That is, as shown in FIG. 3A, at the beginning of cutting, the irradiation positions of the two laser beams are separated from each other, gradually approached to each other, and cut into V-shapes. At the end of cutting, the irradiation positions of the two laser beams are gradually separated to cut into an inverted V shape.

Further, as shown in FIG. 3 (b), at the beginning of cutting, the irradiation positions of the two laser beams are gradually brought close to each other to make a U-shaped cut, and at the intermediate position, the irradiation positions of the laser beams coincide. Further, at the end of cutting, the irradiation positions of the two laser beams are gradually separated to cut into an inverted U shape.

Further, in FIG. 3 (c), at the beginning of cutting, the irradiation positions of the two laser beams are gradually brought close to each other to make a V-shaped cut, and thereafter, the irradiation positions of the laser beams are made to coincide with each other, and the central position is set. Then, the irradiation positions of the two laser beams are gradually operated to cut into a rhombus shape, and at the end of the cutting, the irradiation positions of the two laser beams are gradually separated to cut into an inverted V shape. Note that FIG.
The above cutting positions in (a) to (c) are indicated by cutting lines C, respectively.

[Embodiment 3] This embodiment is characterized in that the irradiation positions of the laser light are made to partially intersect with each other. That is, as shown in FIG. 4, the irradiation positions of the two laser beams are separated at the beginning of cutting, and the laser beams are made to gradually approach each other to intersect the laser beams at a substantially intermediate position of the base sheet 2,
After that, the irradiation positions of the two laser beams are gradually separated again to cut along the cutting lines C and C ′.

[Embodiment 4] The present embodiment is characterized in that the irradiation positions of the laser light are crossed a plurality of times for irradiation. That is, by moving the condenser lens 3 while rotating it as shown in FIG. 5A, the base material sheet 2 is spirally cut as shown in FIG. 5B.

[Embodiment 5] This embodiment is characterized in that laser lights having different focal points are used. That is, FIG.
As shown in FIG. 6A, by using the condensing lens 3 having a different focus, the base sheet 2 is irradiated with the laser light, so that FIG.
As in (b), cutting is performed with laser light and heat treatment is performed with laser light.

[Embodiment 6] This embodiment is characterized in that a laser beam having a large central laser beam mode and a small peripheral laser beam mode is used. That is, as shown in FIG. 7A, the condenser lens 3 produces laser light having a large central laser beam mode and a small peripheral laser beam mode. This laser light is shown in FIG.
As shown in FIG. 7B, the central laser beam mode is large, and the peripheral laser beam mode is small. If the substrate sheet 2 is irradiated with this laser beam mode, the central laser beam mode becomes as shown in FIG. It is possible to perform cutting with the laser light and heat treatment with the surrounding laser light.

[0015]

As described above, the present invention irradiates a base sheet with a mount, which is composed of a mount and a base sheet which can be peeled off from the mount, with a laser beam to cut the base sheet. In the cutting method of (1), a plurality of laser beams are irradiated close to each other, partially close to each other, or partially crossed, and further crossed several times, thereby improving the reliability of cutting and the substrate. The peelability of the sheet can be improved. Further, by using laser light having different focal points, or by using laser light having a large central laser beam mode and a small circumferential laser beam mode, it is possible to perform cutting and heat treatment at the same time, and to cut the cutting portion. Since it is heat-treated into a ball shape, the releasability of the base sheet can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an appearance of a cutting device for a base sheet with a mount.

FIG. 2A and FIG. 2B are diagrams showing a state in which a plurality of laser beams are radiated and cut while being brought close to each other.

FIGS. 3A to 3C are diagrams showing a state in which a plurality of laser beams are partially brought close to each other and irradiated, and then cut.

FIG. 4 is a cross-sectional view of a plurality of laser beams,
It is a figure which shows the state cut | disconnected.

5A and 5B are diagrams showing a state in which a plurality of laser beams are crossed a plurality of times to irradiate and cut.

6A and 6B are diagrams showing a state in which a plurality of laser beams having different focal points are irradiated and cut.

7A to 7C are diagrams showing a state in which a wine cup-shaped laser beam is irradiated and cut.

[Explanation of symbols]

 1 Mount 2 Base Material Sheet 3 Condensing Lens 10 Base Material Sheet with Mount Paper 20 Supply Roll 30 Winding Roll 40 Laser Cutting Device

Claims (6)

[Claims] 1. A method of cutting a base sheet with a mount, which comprises irradiating a base sheet with a mount, which comprises a mount and a base sheet that can be peeled off from the mount, with a laser beam to cut the base sheet. A method for cutting a base material sheet with a mount, which is characterized in that irradiation is carried out while keeping them close. 2. The method of cutting a base sheet with a mount according to claim 1, wherein the irradiation positions of the laser light are partially close to each other. 3. The method for cutting a base sheet with a mount according to claim 1, wherein the irradiation position of the laser light is made to partially intersect with the irradiation position. 4. The method for cutting a base sheet with a mount according to claim 1, wherein the irradiation position of the laser beam is crossed a plurality of times for irradiation. 5. The method for cutting a base sheet with a mount according to claim 1, wherein laser beams having different focal points are used. 6. The method for cutting a base sheet with a mount according to claim 1, wherein a laser beam having a large central laser beam mode and a small peripheral laser beam mode is used.