JPH0116672B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an engraved plate with good appearance from a laminated sheet formed by laminating a film layer mainly composed of polyester and a paper layer.

Conventionally, various stamped and cut-out plates have been obtained by punching plastic film or paper into any shape and then applying the desired engraving on the surface. Each process is performed using separate equipment, requiring at least two steps, which takes a lot of time, and there is often a misalignment between the marking and punching positions, making it difficult to obtain the desired product. It has its drawbacks.

Furthermore, conventional stamped and punched molded products made of plastic film or paper alone have the disadvantage that the positions of the stamps and the punches tend to be misaligned as described above, and they also lack a sense of solidity. Moreover, in the case of plastic film, in addition to this, it has no stiffness, and after being punched out, the film turns white when bent by a small external force.
It also has the disadvantage that it cannot be used as a product.

In view of the current situation as described above, the present inventors used a laminated sheet in which a film layer mainly composed of polyester and a paper layer were laminated via an acrylic adhesive layer, and identified the surface of the film layer of this sheet. A special cutting die device equipped with a blade die and engraving is heated and crimped while holding the plate at a certain temperature in advance, and the engraving and blade die cutting are performed at the same time, thereby producing an engraved plate with an excellent three-dimensional appearance. The present invention was achieved by discovering that

That is, the gist of the present invention is to laminate a film layer mainly composed of polyester (hereinafter abbreviated as polyester film layer) (1) and a paper layer (2) via an acrylic adhesive layer 3. Using a laminated sheet 4, the surface of the polyester film layer 1 of this laminated sheet 1 is heated to
While preheating and maintaining the temperature in the range of 150°C, the mold 7 is formed into a mold 7 equipped with a blade mold 5 and a stamp 6, and the mold 7.
is supplied to the lower part of a cutting die device 9 which is composed of a heating device 8 for heating the material, and while the cutting die device 9 is heated, it is pressed from the polyester film layer 1 of the laminated sheet 4 and a stamping blade is cut out. There is a method for manufacturing a stamped plate, characterized in that the above steps are carried out at the same time.

The laminated sheet 4 used in the present invention has a polyester film layer 1 and a paper layer 2 laminated with an acrylic adhesive layer 3 in between. By using a laminated layer of polyester film layer 1 and paper layer 2, it is possible to obtain an engraved plate that is stiff, has an excellent solid feel, and is resistant to whitening of the film due to stiff bending. can. The polyester film layer 1 in the present invention has a metal layer on at least one surface thereof, or is composed only of a single layer of colored or uncolored polyethylene terephthalate film without a metal layer, or is composed of a single layer of colored or uncolored polyethylene terephthalate film without a metal layer, or Alternatively, at least one surface of an uncolored polyethylene terephthalate film layer is subjected to hairline processing or sandplast processing. Further, at least one side of the colored or uncolored polyethylene terephthalate film layer is subjected to hairline processing or sandplast treatment, or a metal layer is formed on at least one side of the film that is not subjected to these treatments, and then one of the layers is formed. It also includes a laminated composite in which a polyethylene terephthalate film layer is further provided on one or both metal layer surfaces with a heat-sensitive adhesive thermoplastic resin film layer such as polyvinyl chloride or polyethylene interposed therebetween. Here, polyethylene terephthalate film is obtained by forming a polyethylene terephthalate homopolymer or a polyethylene terephthalate copolymer containing ethylene terephthalate units as the main component, or a polymer obtained by mixing these resins with a small amount of a third resin component, into a film using a conventional method. It is something.

Further, the paper layer 2 in the present invention is composed of ordinary paper having an arbitrary thickness. The acrylic adhesive used to laminate the polyester film layer 1 and the paper layer 2 contains acrylic ester as a main component. When such an acrylic pressure-sensitive adhesive is used, an engraved plate with an excellent appearance can be obtained by performing cutting with a knife in a heated state as described below.

To explain the implementation details of the present invention with reference to the drawings, as shown in FIG. Heat the surface with heater 10 to 60~
It is supplied to the lower part of the cutting die device 9 while being preheated and maintained at 150°C, preferably in the range of 70 to 100°C. It is not preferable if the surface of the polyester film layer 1 is heated and maintained at a temperature below 60° C., since only unclear markings will be obtained. Also, if the temperature exceeds 150℃,
This is undesirable because it may cause blurring or burning of the stamp, resulting in poor appearance or poor dimensional stability.

Here, as a method of heating the surface of the polyester film layer 1, a heating method using an infrared heater is preferable. Although heating can be performed using a heater other than an infrared heater, in the usual heating method, polyester film layer 1 and paper layer 2
Care must be taken because unevenness occurs in the acrylic adhesive layer 3 interposed between the acrylic adhesive layer 3 and the acrylic adhesive layer 3, making it difficult to obtain a plate with excellent appearance. Thereafter, the polyester film layer 1 side of the heated laminated sheet 4 is pressed with a cutting die device 9 in a heated state, and stamping and blade cutting are performed simultaneously to obtain a plate with a stamp of a desired shape.

It is sufficient for the cutting die device 9 to heat the surface of the polyester film layer 1 to a temperature similar to the above-mentioned temperature range, and in particular, heating it to a temperature range of 70 to 100°C is sufficient to achieve its purpose. achieved.
The cutting die device 9 includes a die 7 equipped with a blade die 5 and a stamp 6, and a heating device 8 for heating the die 7.
It is composed of. As an example of the mold 7, as shown in FIG.
The blade mold 5, the stamp 6, and the mold 7 are integrated, but are not limited to these. This also includes those molded by casting. Further, the stamp 6 can take the shape of either a relief stamp or an intaglio stamp, and is determined by the desired shape of the stamp.

In the present invention, the cutting die 5 is heated by heating the cutting die device 9 to the temperature range mentioned above.
and stamp 6 are also heated to the same temperature range, and these blade mold 5, stamp 6 and mold 7
Any material can be used as long as it has good heat conductivity and wear resistance, but hard metals are particularly preferred. On the other hand, the heating device 8, as shown in FIG. 3, is equipped with an electric heating plate 13 and a temperature detection end 14, both of which are connected to a thermostat 15, so that the temperature can be adjusted to a required temperature. Unnecessary margins, so-called slag, of the laminated sheet 4 that has been stamped and cut with a blade die are taken up upward by a take-up roll 11. FIG. 4 shows a cross section of the obtained stamped plate. In the figure, 16 indicates a stamped portion.

When the above-mentioned stamping and blade cutting are carried out at room temperature, the stamped part sag, the stamp becomes unclear, and the edge of the cutout has burrs, which causes problems in terms of appearance and product quality. In addition, since an acrylic adhesive layer containing acrylic acid ester as the main component is used, if the blade is continuously cut out at room temperature, the adhesive will seep out from the edge of the cutting edge and adhere to the blade. This stains the blade mold, and the attached adhesive also transfers and adheres to the surface of the laminated sheet used for cutting the blade mold, so the blade mold must be cleaned with a solvent or coated with silicone, which will prevent continuous processing and molding. There was a problem in preventing stains. Furthermore, the adhesive that has seeped out from both ends of the molded product and the edge of the slag will stick together again, reducing the work efficiency of separating the punched molded product from the slag and causing dirt and dust to adhere to the molded product. The disadvantage was that it was easy to cause

However, as in the present invention, if the surface of the polyester film layer of the laminated sheet is preheated and then stamping and cutting are performed using a heated die, the blade die 5 is crimped and the laminated sheet is formed as shown in FIG. When biting into the acrylic adhesive, the heated blade 5 is in close contact with the edge, and the laminated sheet is preheated, so the viscosity of the acrylic adhesive temporarily decreases.
In addition, the acrylic adhesive layer becomes thinner and no longer oozes out, and after removing the blade mold 5, the pressing force is released and the acrylic adhesive cools down and returns to its original state. There is no adhesion and no burrs, making it possible to perform continuous processing with easy separation from slag, and to prevent dirt from contaminating the edges.
Furthermore, this punched edge has an excellent appearance with a rounded and three-dimensional effect, and also has excellent features such as being able to prevent misalignment between the stamp and the punch.

The present invention will be explained below with reference to Examples.

EXAMPLE The following experiment was conducted on the production of a decorative plate for the top surface of a cosmetic cap, in which a desired trademark was engraved in the center, and the engraved plate was punched into a round shape.

The film has an acrylic adhesive (PF manufactured by Fuji Paper Co., Ltd.) layer containing acrylic acid ester as its main component on one side, and is a film based on polyethylene terephthalate film, which has been treated with hairline processing and aluminum vapor deposition. A 180μ thick polyester film (Mitsubishi Rayon's “Hairline Millenart Adhesive Type”) was pasted onto 450μ thick special ivory paper, and the polyester/
A paper-based laminated sheet 4 was obtained. This laminated sheet 4 is placed on the sheet feeding and moving machine bed 12 shown in FIG. 75~80℃ with stamp 6
When the material was supplied to the lower part of the cutting die device 9 which was heated to 100° C., the plate was crimped, stamped, and cut out by the blade at the same time, and a plate was obtained at a crimping speed of 80 times per minute. When this method was used, clear markings were obtained, and at the same time, no burrs or misalignment between the markings and the cutting blade were observed. Moreover, since the blade mold 5 was heated, there was almost no seepage of the adhesive from the edge portion, and no adhesive was attached to the blade mold 5 or to the surface of the molded product. Furthermore, an excellent effect was obtained in separating the slag by simply rolling up the slag upward by the take-up roll 11, and the molded product plate continuously fell down and remained.

Laminated sheet 4 used in the above experiment as a comparative example
After stamping at room temperature, the second step was cutting with a blade at room temperature. With this method, sagging occurred in the area around the stamp, and stains on the surface of the molded product were observed due to burrs on the punched edges and adhesion of exuding adhesive. In addition, the process of extracting molded products from the slag did not go well, and there was a misalignment between the stamp and the cutting blade, making continuous processing impossible.

[Brief explanation of drawings]

Fig. 1 is an overall explanatory diagram of the apparatus for carrying out the method of the present invention, Fig. 2 is an enlarged explanatory diagram of the mold shown in Fig. 1, and Fig.
The drawings are a perspective view of the heating device shown in FIG. 1, FIG. 4 is a cross-sectional view of a molded product manufactured according to the present invention, and FIG. 5 is an enlarged cross-sectional view showing the state of cutting by the blade of the mold. 1... Polyester film layer, 2... Paper layer,
3... Acrylic adhesive layer, 4... Laminated sheet,
5... Blade mold, 6... Engraving, 7... Mold, 8... Heating device, 9... Cutting die device, 10... Sheet heating heater, 11... Sheet take-up roll, 12
...Mechanical bed for sheet supply movement, 13...Electric heating plate, 14...Temperature detection end, 15...Thermostat, 16...Marking section.

Claims (1)

[Claims] 1 Using a laminated sheet 4 formed by laminating a film layer 1 mainly composed of polyester and a paper layer 2 via an acrylic adhesive layer 3, the surface of the film layer 1 mainly composed of polyester of this laminated sheet 1 is used. The mold is made up of a mold 7 equipped with a blade mold 5 and a stamp 6, and a heating device 8 for heating the mold 7, while preheating and maintaining the mold to a temperature in the range of 60 to 150°C using a heating heater 10. The film layer 1 of the laminated sheet 4 is pressed from the polyester-based film layer 1 side while the cutting die device 9 is heated, and stamping and blade cutting are performed at the same time. A manufacturing method for plates with distinctive markings.