JPS6255989B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved method for easily manufacturing a silk screen in the screen printing method of the cutting method and for improving the print quality when using this method, and an automatic method using a computer. This method is particularly suitable for cutting.

Silk screen printing methods include a direct method using a film, an intuitive method using a photosensitive resin film, and a cutting method, which is the object of the present invention. Traditionally, the cutting method has been pointed out to have drawbacks such as not being able to print large quantities, being able to print only on paper or cloth, and not being able to reproduce the screen, so it was not generally used. In Japanese Patent Application Publication No. 55-164161,
A method of manufacturing a screen for printing and textile printing using a film sheet with an adhesive layer sandwiched between the film and a mount is shown, but the mount only has the function of supporting the film after cutting. Since the most important cutting process must be performed by sliding the cutter against the film surface, the cutting depth of which can be finely adjusted, the cutting speed cannot be increased and uneven cutting cannot be prevented. Ta. Furthermore, since the film is attached to the screen and used as is until the end of printing, the film is limited to polyvinyl alcohol or the like which is insoluble in printing ink. Furthermore, the problem that the bonded material peels off after multiple uses is the same as in the case of using conventional varnished paper that is bonded to the screen by heating.

To explain this in more detail, when a conventional film made of polyvinyl alcohol or the like is cut and laminated onto a screen, the film itself becomes an ink-impermeable film and acts as an ink-permeable film. This point is also related to the fact that in the past, it was nearly impossible to express thin lines and outlines in cutting method silk screen printing. In other words, when the film cut in this way directly forms an ink-impermeable film, there is no need to cut thin and curved films with a width of a few millimeters, such as contour lines or hair. It was possible. Furthermore, even if the film can be cut, there will be problems with the adhesive strength of the film pasted onto the screen, and such an ink-impermeable film cannot withstand multiple printings. Therefore, there were problems that needed to be solved in terms of the finish of the printed matter and the number of times it could be printed.

However, the present inventor was the first to develop a screen printing method that solved the drawbacks of using conventional varnished paper by forming a resin film with ink permeable holes on the screen (Japanese Patent Application Laid-Open No. 59-1993). −45185
Due to this issue, the silk screen printing method of the cutting method is once again in the spotlight. The newly developed method involves first cutting a single layer of sealing film based on the printing plate to create a mold sealing film, pasting this mold sealing film onto a screen using an adhesive, and then pasting the mold sealing film onto the screen. After a resin is applied to the top to form a film, the adhesive is dissolved from the back using a solvent and the mold sealing film is removed. This series of operations creates ink passage holes on the screen similar to those on the block, making printing possible.

In the above-mentioned screen printing method, it is important to cut the seal film into a mold seal film. It is no exaggeration to say that the quality of printing is determined by the cutting. Also, from the point of view of work efficiency, it is necessary that cutting be performed easily. The present invention has been completed as a result of various studies based on these reasons. Its characteristics are:
The sealing film uses a special three-layer laminated film, specifically a base film A that is thick enough to not be completely cut by the cutter edge, an intermediate film B that becomes the mold sealing film, and an adhesive on the intermediate film. A sealing film laminated with a release paper C that protects the agent and facilitates cutting is cut into a predetermined shape using a cutter, an unnecessary intermediate film B is removed, and a mold sealing film 4 is placed on the base film A. Then, the base film A is removed, and a resin 8 is applied to the screen 7 to form a solidified film. 4 is removed to form ink permeable holes.

A specific cutting method is shown in FIGS. 1 to 3. A feature of this method is that a special sealing film 1 is used to cut out and leave a mold sealing film 4 of the same shape as the original. It has a structure in which a base film A, an intermediate film B, and a release paper C are laminated with adhesives 2 and 3, respectively. The base film A is preferably a synthetic resin film, but paper or the like may also be used, and is thick enough to be around 100 μm, so that the cutting edge of the cutter 5 cannot completely cut it. After the intermediate film B is cut with a cutter, the required portion of the block shape becomes the mold sealing film 4, and its thickness is preferably 10 to 50 μm. The release paper C protects the adhesive 3 on the intermediate film B, and can protect the adhesive 3 until the mold sealing film 4 with the adhesive 3 is attached to the screen. The release paper C is not limited to paper, and may be replaced with other materials such as polyolefin film as long as it can be peeled off against the adhesive force of the adhesive 3 between the intermediate films B. In the illustrated example, the release paper C is polyolefin-in-film laminated glassine paper.

Cutting may be done manually using a hand cutter, but computer cutting is most suitable. The computer cutting method is a method in which a cutter moves vertically and horizontally under electrical control in accordance with pre-input data on the block to cut the seal film 1 into the shape of the block. As shown in FIG. 1, the cutting path 6 is drawn by setting the cutting edge of the cutter so that it slightly penetrates into the inside of the base film A and running it. Although the above method automates cutting, cutting can also be performed manually using a hand cutter.

After cutting the seal film as described above, as shown in Fig. 2, unnecessary parts of release paper C and intermediate film B are peeled off and removed.
As shown in the figure, only the mold sealing film 4 with the intermediate film B left uncut is left on the base film A. Since the adhesive 3 is present on the upper surface of the mold sealing film 4, when a screen is placed on the mold sealing film 4, the mold sealing film 4 is transferred and bonded to the screen 7 as shown in FIG. The object in this state is then coated with resin 8. After the resin has solidified, only the adhesive to which the mold sealing film 4 is attached is dissolved with a solvent, and the mold sealing film 4 is removed. The hole created after this removal becomes the hole through which the printing ink passes. The process described above enables automatic silk screen manufacturing by combining computer cutting equipment, release paper peeling equipment, screen laminating equipment, resin coating equipment, solvent spraying equipment, etc. be.

Since the seal film cutting plate-making method in the silk screen printing method described in detail above involves cutting a special laminated film, the cutting can be done by machine rather than by hand, and computer cutting can be employed. Therefore, complex printing that was previously impossible using the cutting method and that belonged to the field of photomechanical silk screen printing is now possible using the cutting method as well. Moreover, photoengraving requires photographs, but computer cutting allows
Even if a rough design is submitted, it is stored as internally revised draft data, which can then be used for automatic cutting. Compared to photolithography, the advantages of cutting platemaking, such as clarity at the end of printing, can be utilized even in complex printing. Other features include the ability to use computer cutting, which eliminates the need for drafts (pre-prepared menu graphic data can be used), allows freedom in changing character size, height and width, and layout, and speeds up cutting. It solves all of the problems with conventional cutting plate-making methods, such as being fast and accurate, cutting figures and curves accurately, and being able to be unmanned. These are due to the fact that the seal film is cut using a special laminated film cutting method.

In addition, the screen created by the plate-making method of the present invention is capable of expressing thin lines and outlines even though it is a cutting method, and the printed matter has a good finish and can withstand multiple printings.
It has features such as being able to produce a large number of printed materials.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main part specifically showing the cutting method in the cutting plate-making method of the present invention, and FIGS. 2 to 4 are perspective views of the main part showing the process of manufacturing a zirc screen. 1... Seal film, 2, 3... Adhesive, 4
...Mold seal film, 5...Cutter, 6...
Cutting locus, 7...Screen, 8...Resin, A...Base film, B...Intermediate film, C...Release paper.

Claims (1)

[Claims] 1. A base film A that is too thick to be completely cut by the cutter blade edge, an intermediate film B that serves as a mold sealing film, and a release paper C that protects the adhesive on the intermediate film and facilitates cutting.
The sealing film laminated with the above is cut into a predetermined shape using a cutter, the unnecessary intermediate film B is removed, the mold sealing film 4 is left on the base film A, and the adhesive that the mold sealing film 4 has is removed. Paste it to the screen 7 by 3.
Next, the base film A is removed, a resin 8 is applied to the screen 7 to form a solidified film, and then the mold seal film 4 is removed to form ink permeable holes. Film cutting method.