JPH0737088B2 - Scrap lifting method in label processing - Google Patents

Description

The present invention relates to a label processing method such as label printing, and more particularly to a label processing method for solving the problem of labels rising together in a scrap raising process. It is such a thing.

(Prior Art) Conventionally, label printing, which is a typical label processing, has been performed in a process as shown in FIG. That is, in the paper feeding step, the rolled long base paper 1 is hung on the unwinder 2 of the paper feeding device and automatically fed by the feeding device 3. The base paper 1 used for label printing is also called adhesive paper, and its laminated structure is as shown in FIG.
Surface substrate 11 with undercoat 11a that serves as an anchor for the adhesive
And an adhesive layer 12 and a release paper 13 coated with a release paper 13a. First, in the printing step, for example, the printing cylinder 4 of the printing device makes a rotational reciprocating motion at right angles to the traveling direction of the base paper 1 to print the label 5 on the base paper. When the label requires a high-grade feeling and durability, the transparent film 6 coated with an adhesive is attached to the printing surface of the base paper 1 in the next laminating step. Next, in the die cutting step, the transparent film 6 bonded in the laminating step and the surface base material 11 to the adhesive layer 12 of the base paper 1 are die cut with a flat pressure type die 7 having a blade along the contour of the label. In the subsequent scrap winding process, unnecessary scraps 8 are removed from the die-cut label and scraps of the scrap winding device are removed.
It is automatically wound up by 81 and the scrap winding roll 82, and only the label 5 portion is left on the release paper 13. The printed matter is automatically sheet-cut by the cutting machine 9 every arbitrary number of sheets, and the label printing is completed.

In the scrap winding process in the above conventional label processing method, since the scrap is wound while mechanically pressing the label portion with the scrap lifting roll, there is a problem that the label is lifted together. FIG. 6 is a diagram for explaining this problem, and the scrap raising roll is omitted in order to make the diagram easy to see. In the figure, the label portion 51 in a state where the surface base material 11 and the pressure-sensitive adhesive layer 12 are punched out in the die cutting step is
Although the scrap 8 advances along with the scrap 8 which is an unnecessary portion after the punching process, the scrap 8 is wound up at the position of the scrap raising roll. However, if the adhesive 12 used has a strong self-adhesiveness, the adhesive 12a of the label portion 51 and the adhesive 1 of the residue 8
After the die-cutting, the two and the two become adhered to each other again, and as the scraps are rolled up, the phenomenon of rising together occurs like the label portion shown at 52.

(Problems to be Solved by the Invention) The present invention is to provide an improved label processing method for preventing the label portion from being raised in the scrap winding step.

[Structure of the Invention] (Means and Actions for Solving Problems) In order to solve the above-mentioned object, the label processing method according to the present invention is such that the label portion is pressed against the release paper at the scrap winding position. It is characterized in that the label and the dregs are separated by blowing air to the label portion.

When the air pressure that presses the label portion onto the release paper exceeds the co-raising force of the self-adhesive adhesive that occurs along the die-cut contour, it can be forcibly separated from the residue. Therefore, the problem of label peeling from the release paper due to the double rise is completely eliminated by selecting the position of the air blowing to the place where the strong double rise is made and adjusting the air pressure appropriately.

(Example) An example of a scrap raising step in the label processing method of the present invention will be described below with reference to the drawings. In the drawings of the embodiments, the components denoted by the same reference numerals as those in FIGS. 4 to 6 have the same contents as those in the prior art, and therefore the description thereof will be omitted.

FIG. 1 is a perspective view showing a first embodiment of the present invention in which air is blown out from a nozzle. That is, the air blowing nozzle 14 is arranged at a position near and in front of the residue raising roll 81 as illustrated. This air blowing nozzle
The air inlet 14a of 14 is connected to a pipe from a compressor or a cylinder (not shown) to introduce compressed air.
Further, the tip portion 14b is formed in the shape of a laterally spreading nozzle that blows out air in a width substantially equal to the lateral width of the label in the traveling direction, and between the lower surface of the roll 81 and the die-cut label 51 that advances toward it. It is placed so that compressed air blows out toward.

The operation in the first embodiment is from the compressor to the air inlet.
Compressed air of, for example, about 2 kg / cm ² introduced into 14a is blown out from the nozzle tip portion 14b spread equally to the width of the label, and the blown air is between the die-cut label and the scrap roll as shown by an arrow. Blow through. The pressure of the air at that time exceeds the co-raising force along the relatively long die-cut line in the portion between the label head 51a and the lateral waste 8a, and first separates the label head 51a and the horizontal waste 8a. Head 51a
Since the co-raising force on the label after being separated from the horizontal scrap 8a at the portion is relatively small, the scrap 8 and the label 51 are relatively easily separated along the die-cut contour, and the scrap 8 is shown in FIG. It can be rolled up without raising the label like label 52 of.

Since the phenomenon of co-raising tends to occur between the label head 51a and the horizontal scrap 8a, it is advantageous to intermittently perform air blowing in synchronization with this. Since the force that causes co-raising often becomes locally large and small depending on the direction and shape of the die cut line, it is preferable to determine the shape of the nozzle tip portion 14b correspondingly, and not limited to the shape shown in the figure. .

FIG. 2 is a cutaway perspective view showing a second embodiment of the present invention in which air is blown out from a small hole provided on the surface of the scrap raising roll.

The residue raising roll 21 of the second embodiment is a roll rotation outer cylinder 21a having a large number of air blowout small holes 22 formed through the entire surface, and a fixed inner cylinder 21b provided with a slit 23 for determining the air blowout position. Is. Not shown because it was cut out,
One end of the fixed inner cylinder 21b is connected to a compressed air source, and compressed air is introduced into the inner cylinder 21b. The roll 21 has an inner cylinder 21b.
The slit 23 is fixed so as to correspond to the die cut line of the label head 51a.

In the operation of the second embodiment, the compressed air introduced into the fixed inner cylinder 21b passes through the slit 23 of the inner cylinder, passes through the outer cylinder small hole 22 opened to the slit, and is blown out of the roll directly. Then, the label head 51a is pressed to separate the label from the residue more efficiently than in the first embodiment. Rotating outer cylinder
21a rotates around the fixed inner cylinder 21b as the base paper travels, and does not damage the surface of the base paper. Further, the method of the second embodiment has an advantage that it is possible to deal with a change in product label type by exchanging the fixed inner cylinder in which the width and the length of the slit are changed.

FIG. 3 is a cutaway perspective view showing a third embodiment of the present invention in which air is blown out from a small hole provided on the surface of the scrap raising roll.

The residue raising roll 31 of the third embodiment has a roll outer cylinder 31a having a large number of air blowout small holes 32 penetrating the entire surface and an inner cylinder 31b provided with a slit 33 for determining the air blowout position. . Although not shown because it is notched, one end of the roll is connected to a compressed air source, and the compressed air is introduced into the inner cylinder 31b. The roll 31 is rotated so that the slit 33 of the inner cylinder 31b is synchronized with the die cut line of the label head 51a. Therefore, the length of the outer circumference of the roll when one slit is inserted as shown in the drawing is equal to the length of one label in the traveling direction, but the number of slits to be inserted is not limited to one. The length of the outer circumference of the roll when n slits are inserted is selected to be equal to the length of the n labels in the traveling direction.

The operation in the third embodiment is such that the compressed air introduced into the roll passes through the slit 33 of the inner cylinder and the outer cylinder small hole 32 opened to the slit, and is blown out of the roll directly to the label head. Pressing 51a results in more efficient separation of the label from the residue than in the first embodiment. Further, in the method of the third embodiment, there is little pressure drop due to the use of the inner cylinder with slits, and there is an advantage that it is possible to correspond to the product type change of the product label by exchanging the inner cylinder 31b having a different number and shape of slits. . Furthermore, air may be blown out from all the small holes of the outer cylinder without using the fixing provided with the slits.

[Effect of the Invention] According to the residue lifting method for label processing of the present invention, the air pressure blown suppresses the force of co-raising along the die-cut contour caused by the self-adhesive or the like to force the label part and residue. Since the label is separated, it is possible to solve the problem of label rising.

[Brief description of drawings]

FIG. 1 is a perspective view showing a scrap raising process of a first embodiment of the present invention, FIG. 2 is a cutaway perspective view showing a scrap raising process of a second embodiment of the present invention, and FIG. 3 is a third embodiment of the present invention. FIG. 4 is a cutaway perspective view showing the scrap raising process of FIG. 4, FIG. 4 is a perspective view showing a conventional label processing method, FIG. 5 is a cross-sectional view for explaining the laminated constitution of the base paper, and FIG. 6 is a problem for the conventional method. FIG. 1 …… Base paper, 11 …… Surface base material, 12 …… Adhesive layer, 13 ……
Release paper, 5,51 …… Label, 51a …… Label head, 52 ……
Double-sided label, 7 ... die-cut die, 8 ... waste, 8a ... horizontal waste, 81 ... waste lifting roll, 14 ... nozzle, 21a, 31a ... roll outer cylinder, 21b, 31b ... in roll Cylinder, 22, 32 ... Small hole, 23, 33 ... Slit.

Claims (3)

[Claims] 1. A die-cutting of a surface base material and an adhesive layer of a label portion in a long base paper comprising a surface base material, an adhesive layer and a release paper, and then air is blown to the label portion,
A label processing method, characterized in that a surface base material and an adhesive layer of a non-label portion are lifted up from a release paper and the label portion is left on the release paper. 2. The label processing method according to claim 1, wherein the air is blown from the nozzle intermittently in synchronization with the progress of the label portion after die cutting. 3. An air blower is provided with a residue raising roll in which an inner cylinder with a slit is fitted to an outer cylinder having a large number of small holes formed on the entire surface thereof, and compressed air introduced into the residue raising roll is supplied to the inside. The label processing method according to claim 1, which is carried out by blowing out from a small hole in the outer cylinder opened through the slit in the cylinder to the slit in the inner cylinder.