JP4577779B2 - Die-cutting apparatus and die-cutting method - Google Patents

Description

  The present invention relates to a die-cutting apparatus and a die-cutting device for cutting a raw material having at least a three-layer structure made of a base material temporarily attached onto a release material via an adhesive from the base material side to form a label cut into a predetermined shape. Regarding the method.

  Conventionally, as this type of die-cutting apparatus, for example, a structure shown in FIG. 4A is known. The die-cutting device 1 shown in FIG. 1 applies a predetermined tension to the label raw material 6 by two sets of tension rollers 4 including a conveying roller 2 and a nip roller 3, and in this state, the die-cutting device 1 feeds and conveys the label in the direction of arrow A in FIG. The raw fabric 6 is half-cut, that is, is cut with the die-cut blade 12 of the die-cut roller 10 until it reaches the release material 7 from the label base material 9 side, and a plurality of labels 14 having a predetermined shape are intermittently formed. (See, for example, Patent Document 1 for the structure of such a die-cutting device)

  However, according to the die-cutting apparatus 1 having the conventional structure as described above, when the raw material 6 is cut with the die-cutting blade 12, the label base material 9 and the release material 7 of the raw material label 6 being die-cut always have a predetermined tension. Since it is controlled in this way (see FIG. 4 (A1)), the portion where the tension is not applied after die cutting, that is, the label 14 shrinks. At this time, although it depends on the properties of the adhesive layer 8 on the lower surface of the label 14, the adhesive layer 8 itself is hard at room temperature (low temperature), so that it adheres to the release material 7 as shown in FIG. In some cases, slippage occurs at the interface with the agent layer 8 and the label 14 is displaced on the release material 7. After that, when the predetermined tension is no longer applied to the release material 7, the adhesive layer 8 in the die-cut portion cannot fully return to the original state before sliding as shown in FIG. As shown in FIG. 4B, air enters from the swollen portion under the label 14 and air bubbles and streaks are formed on the outer edge of the label 14 to cause a defective label. .

JP 2004-182359 A

  The present invention has been made to solve the above problems, and its object is to provide a die-cutting apparatus and a die-cutting method suitable for producing a good label without bubbles or streaks. is there.

  In order to achieve the above object, the die-cutting apparatus of the present invention is a die-cutting apparatus that cuts an original fabric of at least a three-layer structure composed of a base material temporarily attached to a release material via an adhesive from the base material side. A tension applying means for applying a predetermined tension to the original fabric; and a cutting means having a cutter blade for forming a notch of a predetermined shape in the original fabric, and a heating means is provided near or around the cutting means. In addition to being provided, the raw fabric is heated by the heating means in accordance with the viscosity of the adhesive layer, and a cut is formed by the cutter blade.

  In the die-cutting apparatus of the present invention, the cutting of the raw material by the cutter blade may be a half-cut that cuts from the base material until reaching the release material.

  In the die-cutting apparatus according to the present invention, the original fabric is composed of an original fabric having at least a three-layer structure having an adhesive sheet and a release material temporarily attached to the upper and lower surfaces thereof. It may be a half cut that cuts from one release material side until it reaches the other release material.

  In order to achieve the above object, the die-cutting method of the present invention is a die-cutting method in which a raw material having at least a three-layer structure consisting of a base material temporarily attached to a release material via an adhesive is cut from the base material side. In this state, when a predetermined tension is applied to the original fabric, and a cut of a predetermined shape is formed on the original fabric with a cutter blade of the cutting device in this state, the bonding is performed by a heating device provided near or around the cutting device The raw fabric is heated according to the viscosity of the agent layer, and a cut is formed by the cutter blade.

  In the die-cutting method of the present invention, the cut of the original fabric by the cutter blade may be a half cut that cuts from the base material until it reaches the release material.

  In the die-cutting method of the present invention, the original fabric is composed of an original fabric having at least a three-layer structure having an adhesive sheet and a release material temporarily attached to the upper and lower surfaces thereof, and the cutting of the original fabric by the cutter blade is performed as described above. It may be a half cut that cuts from one release material side until it reaches the other release material.

  In the die-cutting apparatus and the die-cutting method of the present invention, as described above, when a predetermined tension is applied to the original fabric and the original fabric is cut with the die-cutting blade of the die-cut roller in this state, it is provided near or around the die-cut roller. A configuration was adopted in which the original fabric was heated according to the viscosity of the adhesive layer with a heating means and cut with a die-cut blade. For this reason, since the adhesive layer itself of the adhesive layer is softened by heating, slipping at the interface between the release material and the adhesive layer is prevented, and the original adhesive layer before the die cut part slips as in the past. It is possible to effectively prevent the air from being inflated without fully returning to the state, and to prevent air from being mixed in from the inflated portion, and bubbles and streaks are formed on the outer edge by die cutting. It is suitable for producing a good label or the like that does not occur.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an explanatory view of a die cutting apparatus to which the present invention is applied. The die-cutting device 1 has two sets of tension rollers 4 as tension applying means including a conveyance roller 2 and a nip roller 3 along the original conveyance direction, and each conveyance roller 2 of each tension roller 4 is a motor (not shown). ) And the nip roller 3 of each tension roller 4 has a structure in which the original fabric 6 is sandwiched between the opposite conveying rollers 2.

  The original fabric 6 has a three-layer structure including a label base material 9 temporarily attached to a release material 7 via an adhesive layer 8, and a predetermined tension is applied by the two sets of tension rollers 4. However, it is fed out and conveyed in the direction of arrow A in the figure. In this embodiment, as a mechanism for applying the tension, for example, a motor capable of torque control is used for a motor (not shown) that rotationally drives each conveyance roller 2, and conveyance is controlled so that a predetermined tension is applied to the original fabric 6. However, a predetermined tension may be applied to the original fabric 6 by other methods.

  A die cut roller 10 and a platen roller 11 as cutting means are provided between the two sets of tension rollers 4, and the die cut roller 10 is provided with a die cut blade 12 for cutting the raw fabric 6 on the outer peripheral surface. On the other hand, the platen roller 11 is disposed at a position facing the die cut roller 10 with the original fabric 6 interposed therebetween, and is rotated by a motor (not shown) in synchronization with the die cut roller 10. In this structure, the die-cutting blade 12 that rotates integrally with the die-cutting roller 10 cuts the conveyed raw fabric 6 from the label base material 9 side until it reaches the release material 7, so-called half-cut, and die-cut into a predetermined shape. A plurality of labels 14 are formed intermittently. As the cutting means, a flat die having a flat cutter blade can be used in addition to the die cut roller.

  An electric heater 16 is provided in the vicinity or the periphery of the die cut roller 10 as a heating means 15 for the original fabric 6, and the electric heater 16 has a temperature corresponding to the viscosity of the adhesive layer 8 constituting the original fabric 6. Control is made and the raw fabric 6 can be heated. The temperature range of this heating is such that the adhesive layer 8 itself becomes soft by heating, so that the label 14 is displaced due to slippage of the adhesive layer 8 on the release material 7 after die cutting (FIG. 4A2) and FIG. The temperature range is such that B2) can be prevented. Note that the temperature range of this heating may be determined individually and experimentally in consideration of the viscosity of the adhesive layer 8. In addition to the electric heater, a heating device such as a hot water heater or a combustion heater may be used as the heating means.

  In the die-cutting apparatus 1 of FIG. 1 configured as described above, the original fabric 6 is moved in the direction indicated by the arrow a in the figure while applying a predetermined tension to the original fabric 6 conveyed between the two sets of tension rollers 4. In this state, the original fabric 6 is heated by the heating means 15 and the original fabric 6 is cut by the die-cutting blade 12 (see die-cutting in a half-cut state (see FIG. 1 (B1))). The formed label 14 is formed.

  At that time, the portion of the label 14 is not subjected to the tension immediately after die cutting, and contracts in the direction indicated by the arrow B in the figure. At this time, since the original fabric 6 is heated in the temperature range, the original fabric 6 As the adhesive layer 8 constituting the softening itself becomes soft, almost no slip occurs at the interface between the release material 7 and the adhesive layer 8 on the lower surface of the label 14 as shown in FIG. Maintain close contact with each other. Then, the adhesive layer 8 at the die-cut portion extends obliquely in the direction of arrow C in the figure by the shrinkage force of the label 14.

  Thereafter, when the original fabric 6 after die cutting is conveyed further downstream than the tension roller 4B on the downstream side in the original conveyance direction, no tension is applied to the release material 7, and the die cut portion extending obliquely at this time The adhesive layer 8 is sufficiently returned to the original state (see FIG. 1 (B3)).

  Therefore, according to the die-cutting device 1 of FIG. 1, the adhesive layer 8 in the die-cut portion is swelled as in the conventional device (see FIG. 4 (A3)), or from the swelled portion. Air does not enter under the label 14, and it is possible to effectively prevent bubbles and streaks from forming on the outer edge of the label.

  In FIG. 1, as a specific configuration of the heating unit 15, an example of a structure in which the electric heaters 16 are arranged in the front-rear direction of the outer peripheral surface of the platen roller 11 and the raw fabric 6 is heated from the platen roller 11 side is shown. Instead of this or in combination with this, the electric heater 16 may be arranged in the front-rear direction of the outer peripheral surface of the die cut roller 10 to heat the original fabric 6 from the die cut roller 10 side.

  Further, in place of or in combination with the heating by the electric heater 16, either one or both of the platen roller 11 and the die cut roller 10 are heated, and the heated platen roller 11 and the die cut roller 10 heat the original fabric 6. You may employ | adopt the structure to perform.

  Further, as shown in FIG. 2, the range including the die cut roller 10 and the conveyance roller 2B on the downstream side in the conveyance direction is accommodated in the heating case 17, and the temperature of the heating case 17 is increased to heat the original fabric 6. You may comprise. In addition to this configuration, the heating by the electric heater 16 or the heating by the platen roller 11 may be used in combination.

  Although the example of the half cut by the die cut blade 12 was shown in the said embodiment, this invention is a die cut blade of another die cut roller, and until it completely penetrates the peeling material 7 from the label base material 9 side as shown in FIG. The present invention can also be applied to a case where a so-called full cut is performed by cutting the original fabric 6.

  Moreover, about the said original fabric 6, it shall consist of the raw fabric of the at least 3 layer structure which has the adhesive sheet as a base material, and the peeling material temporarily attached to the upper and lower surfaces, and cut | incision by the die-cut blade 12 about this original fabric May be a half cut that cuts from one side of the release material constituting the original fabric until it reaches the other release material.

  As mentioned above, although embodiment of this invention was disclosed, this invention is not limited to this. For example, in the above-described embodiment, the original label 6 is exemplified as the original fabric 6, but instead of this, a protective sheet for protecting the surface of an adherend such as a semiconductor wafer or a sheet base material for forming a dry resist film is used. The present invention is also applied to an original fabric having at least a three-layer structure in which a film substrate such as is temporarily attached on a release material via an adhesive. The shape of the label formed by die cutting is not limited to a circular shape, and may be a polygonal shape.

FIG. 1 is an explanatory view of a die cutting apparatus to which the present invention is applied, in which (A) is a plan view of the die cutting apparatus, (B) is a side view thereof, (B1) is an enlarged view at the time of die cutting, (B2) is a partially enlarged view for explaining the tension after die cutting, and (B3) is a partially enlarged view for explaining the tension after passing through the tension roller. Explanatory drawing of the other die-cutting apparatus to which this invention is applied. Explanatory drawing of the raw material in which all cuts are performed. 4A and 4B are explanatory views of a conventional die cutting apparatus. FIG. 4A is a side view of the die cutting apparatus, FIG. 4A is an enlarged view at the time of die cutting, and FIG. 4A is a portion for explaining tension after die cutting. In the enlarged view, (A3) is a partially enlarged view for explaining the tension after passing through the tension roller, and (B) is an explanatory view of a streak pattern generated on the label edge by die cutting.

Explanation of symbols

1 Die-cutting device 4 Tension roller (tensioning means)
6 Original fabric 7 Release material 8 Adhesive layer 9 Label base material (base material)
10 Die-cut rollers (cutting means)
12 Die-cut blade (cutter blade)
15 Heating means

Claims (6)

In a die-cutting apparatus for cutting an original fabric of at least a three-layer structure composed of a base material temporarily attached via an adhesive on a release material from the base material side,
Tension applying means for applying a predetermined tension to the original fabric;
Cutting means provided with a cutter blade for forming a cut of a predetermined shape in the original fabric,
A die cutting apparatus characterized in that a heating means is provided in the vicinity of or around the cutting means, and the original fabric is heated by the heating means in accordance with the viscosity of the adhesive layer to form a cut with the cutter blade. . The die cutting apparatus according to claim 1, wherein the cutting of the raw material by the cutter blade is a half cut that cuts from the base material until reaching the release material. The original fabric consists of an original fabric of at least a three-layer structure having an adhesive sheet and a release material temporarily attached to the upper and lower surfaces thereof,
The die cutting apparatus according to claim 1, wherein the cutting of the raw material by the cutter blade is a half cut that cuts from the one release material side until reaching the other release material. In the die-cutting method of cutting an original fabric of at least a three-layer structure composed of a base material temporarily attached via an adhesive on a release material, from the base material side,
When a predetermined tension is applied to the original fabric and a cut of a predetermined shape is formed on the original fabric with a cutter blade of the cutting device in this state, the adhesive layer is formed by a heating device provided near or around the cutting device. A die-cutting method, characterized in that the raw material is heated according to the viscosity of the material to form a cut with the cutter blade. The die cutting method according to claim 4, wherein the cutting of the raw material by the cutter blade is half-cutting from the base material until reaching the release material. The original fabric consists of an original fabric of at least a three-layer structure having an adhesive sheet and a release material temporarily attached to the upper and lower surfaces thereof,
The die cutting method according to any one of claims 4 and 5, wherein the cutting of the raw material by the cutter blade is half-cutting from the one release material side until reaching the other release material.

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