JP2006327135A - Method of fixing matter to be printed, mechanism for avoiding stain on printing table, and screen printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of fixing matter to be printed, for screen-printing a foil-like matter to be printed, a mechanism for avoiding a stain on a printing table, which enables continuous printing, and a high-throughput screen printer. <P>SOLUTION: In this method of fixing the foil-like matter 10 to be printed to the printing table of the screen printer, a cutout part 21 corresponding to only a part to be printed is provided on the matter 10 arranged on the printing table; and a thin metal plate 13 in such a shape as to cover an unprinted region of the matter 10 is placed to fix the matter 10. In this case, the printing table comprises a fixing printing table 9 provided with a suction hole 14 for sucking and fixing the plate 13 and an absorbent-paper holding printing table 12 for supporting the matter 10 via absorbent paper 11 for preventing staining. Additionally, the printing table 12 can be moved downward after printing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing substrate fixing method, a printing table stain countermeasure mechanism, and a screen printing machine, and more particularly to a substrate fixing method and a printing paste for a printing table that are suitable for fixing a foil body substrate that is easily plastically deformed. The present invention relates to a printing table stain countermeasure mechanism and a high-throughput screen printing machine that can prevent smudges and enable continuous printing.

  In conventional screen printing, a technique using pins and chucking is used as a method for fixing the printed material with sufficient rigidity to withstand the printing conditions. If the printed material has a low rigidity such as a foil, it is fixed by suction. Etc. are used. However, when shape deformation is likely to occur on the substrate, normal suction fixation cannot be performed, and the printing method by screen printing becomes difficult, and printing by other methods is unavoidable. Also, no such screen printing technique is found in the patent literature.

  Further, a mechanism disclosed in Japanese Patent Application Laid-Open No. 2004-151561 is known as a print table contamination countermeasure mechanism. The contents will be described with reference to the drawings.

  FIG. 5 shows a conventional screen printing machine, and FIG. 5 (a) is a schematic view of the arrangement of the substrate and suction paper for continuous printing in the screen printing machine. A supply mechanism unit 2 and a discharge mechanism unit 3 are installed on the right and left sides of the printing mechanism unit 1, and a substrate 4 and suction paper 5 are installed in the supply mechanism unit 2. The discharge mechanism 3 is provided with a suction paper take-up shaft 6 and other devices, and finally a printed material take-up shaft 7.

  The substrate 4 overlaps the suction paper 5 before the printing mechanism unit 1 and is supplied to the printing mechanism unit 1. FIG. 5B is a cross-sectional view showing a state in which the superposed substrate 4 and suction paper 5 are supplied onto the printing table 8 of the printing mechanism unit 1.

  The printed material 4 and the suction paper 5 that have finished printing are separated when they exit the printing mechanism unit 1, and the printed material 4 is wound around the printed material take-up shaft 7 through a drying device, and the suction paper 5 is separated, It is wound around the discharge shaft 6.

JP 2000-85099 A

  However, the screen printing method on a foil-like substrate to be deformed has a problem that it is difficult to separate the screen plate from the substrate, and is not suitable for screen printing.

  In addition, as described in the prior art (Patent Document 1), as a mechanism for preventing smudges on the print table, the printing material and suction paper are printed after being overlapped in the pre-printing process, thereby preventing smudges on the print table. Although it seems to be a monotonous construction method at first glance, the printed material and the suction paper after printing must be transported without misalignment in the running direction, and the surface condition of the printed material and the suction paper is always managed, It was necessary to pay attention to transport without deviation. In addition, the scale of the apparatus is increased, and there are many points to be noted in the separation mechanism between the substrate and the suction paper.

  In this situation, an object of the present invention is to provide a printed material fixing method that enables screen printing on a foil-like printed material that is easily deformed, and to provide a printing table contamination countermeasure mechanism that enables continuous printing. Another object is to provide a high-throughput screen printer.

  The present invention fixes a printed material that is easily deformed from above by pressing it from the top, enables printing by a screen printing method, and uses a printing table that can be easily separated from the printed material. The problem is solved by using a mechanism for preventing contamination of the printing paste on the printing table.

  Specifically, as a fixing method of a foil-like printed material that is assumed to be deformed by screen printing, only a portion to be printed is cut out from above the printed material arranged on the printing table, and the printed material is A thin metal plate (thin plate that does not affect the quality of screen printing) that has a sufficient area to cover the non-printing area is placed, and the non-printing area of the substrate is pressed by the weight of the metal thin board.

  The metal thin plate placed on the foil-like printed material is adsorbed on the printing table, so that the foil-like printed material is pressed against the printing table, and the plate can be separated in the printing process in the screen printing machine.

  In addition, when the printing pattern of screen printing is equal to the shape of the substrate, suction paper (for preventing the printing paste from being detached from the substrate and adhering to the printing table due to the positional deviation of the substrate on the printing table ( In the present invention, inexpensive kraft paper or the like is placed below the substrate to be printed, and the suction paper is set in a reel state so that reels are arranged at both ends of the printing table so that it can be unwound and taken up. The new surface is unwound from one reel and taken up to the other reel at the end of printing to prevent sticking of the printing paste to the printing table and enable continuous printing, and the suction paper and cover. By providing a suction paper table on the printing table so that the printed material can be separated on the printing table, and moving only the suction paper table downward when printing is completed. Suction paper can be installed without separating the printed material and suction paper, and the operation of feeding and discharging the printed material is synchronized, and suction is achieved by minimizing the unwinding amount (winding amount) of the suction paper Reduce the amount of paper used.

  That is, the printing material fixing method of the present invention is a printing material fixing method for fixing a foil-shaped printing material to a printing table of a screen printing machine, and printing is performed on the printing material arranged on the printing table. A cutout portion corresponding to only a portion to be printed is provided and a non-printing portion of the printed material is covered, and the printed material is fixed by placing a metal thin plate larger than the printed material.

  By adsorbing the metal thin plate onto the printing table, the substrate can be pressed against the printing table.

  The substrate can be a foil having a rectangular hole.

  Further, the printing table stain prevention mechanism of the present invention is a printing table stain prevention mechanism for preventing stains caused by printing paste on a printing table of a screen printing machine, and a printing table for fixing a printed material in a foil-like body, and the printing material A suction paper reel for supplying and discharging suction paper for adhering the printing paste detached from the printing table and preventing it from adhering to the printing table, and the suction paper for printing And a suction paper holding printing table movable so as to separate the suction paper from the printing material after printing.

  In the printing table contamination countermeasure mechanism, the substrate can be a foil having a rectangular hole.

  Further, the screen printing machine of the present invention is a screen printing machine that performs printing at a high throughput on a printed material made of a foil-like material that is easily deformed, and is provided with a cutout portion that corresponds only to a portion to be printed on the printed material. And a fixing printing table for holding the printing material by placing a metal thin plate larger than the printing material on the printing material and fixing the non-printing portion of the printing material. A suction paper reel for supplying and discharging suction paper for adhering the printing paste detached from the substrate and preventing it from adhering to the surroundings, and the suction paper for printing. A suction paper holding printing table which is brought into contact with the substrate from below and is movable so as to separate the suction paper from the substrate after printing. And it features.

  The fixing printing table may have a vacuum suction mechanism.

  Regarding the screen printing machine, the substrate may be a foil having a rectangular hole.

  According to the present invention, it is possible to perform a printing method on a substrate to be changed in shape with an inexpensive and general screen printing machine, and to eliminate printing paste stains on a printing table that has prevented continuous printing. Thus, high-throughput continuous printing is possible.

  A substrate fixing method, a printing table antifouling mechanism, and a screen printing machine according to the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a configuration of a screen printing machine according to an embodiment of the present invention.

  First, FIG. 4 shows a substrate to be printed before and after screen printing. FIG. 4A is a perspective view showing a printed material before printing, where 10 is the printed material and 20 is a rectangular hole. FIG. 4B is a perspective view showing the printed material and the printing paste pattern after printing, and 17 shows the printing paste, which spreads not only on the upper surface of the printed material 10 but also on the inner surface of the rectangular hole 20. . A specific printed material 10 according to an embodiment of the present invention is an aluminum foil having a thickness of about 100 μm in which rectangular holes are continuously formed and subjected to chemical conversion treatment on the surface, and the printing paste 17 is conductive. It is a paste.

  Hereinafter, description will be made according to the screen printing process. As shown in FIG. 1, the printing table has a space where the substrate 10 can be placed and a space where the suction paper 11 can be placed. In particular, a portion where the suction paper 11 is placed is called a suction paper holding printing table 12. The suction paper 11 is unwound and wound between reels arranged on both sides of the suction paper holding print 12. The printing table 9 (fixing printing table) is provided with a suction hole 14 for sucking the metal thin plate 13, and the metal thin plate 13 can be opened with a window (cutout portion 21) cut out only from the printing site. The thin plate has a shape that covers the non-printed portion of the printing material and does not affect the quality of screen printing.

  Further, the suction paper holding print table 12 can move downward with respect to the print table 9, and the printed material 10 and the suction paper 11 after printing can be separated on the print table 9. In this case, the suction paper holding and printing table 12 and the suction paper 11 are somehow fixed (for example, suction, tension device, clamp).

  Further, a screen plate 15 is installed above the metal thin plate 13, and the metal thin plate 13 and the screen plate 15 can be moved in the vertical direction with respect to the printing table 9. The metal thin plate 13 is sucked by the suction hole 14 while pressing from above. Thereafter, the screen plate 15 descends from above and is ready for printing. In the figure, the portion indicated by the mesh is the print pattern 16.

  Next, FIG. 2 is an explanatory diagram of a plate separation phenomenon in screen printing. FIG. 2A is a cross-sectional view showing a state in which the substrate 10 is pressed by the metal thin plate 13, and the metal thin plate 13 is sucked and sucked by the suction holes 14 provided in the printing table 9. A thin metal plate 13 holds the substrate 10. FIG. 2B is a cross-sectional view showing the plate separation phenomenon of the screen plate 15 during printing. When the squeegee 18 travels on the screen plate 15, it applies a printing pressure downward. The screen plate 15 becomes as shown in FIG. 2B by the printing pressure of the squeegee 18, and the printing paste 17 is transferred to the substrate 10. At this time, after the squeegee 18 passes, the screen plate 15 tends to leave the substrate 10. Such a state is referred to as separation of the screen plate. At this time, the substrate 10 receives the peeling force F of the printing paste 17 from the screen plate 15 to be separated. In the drawing, the metal thin plate 13 is attracted by the suction force Q from the suction hole 14 provided in the printing table 9 so that the foil-like printed material 10 can be fixed. In the figure, the relationship 2Q> F is established. Instead of the suction force Q, a force pressing from above may be applied to the metal thin plate 13.

  FIG. 3 is a schematic cross-sectional view showing the positional relationship among the print table 9, the suction paper holding print table 12, the substrate 10 and the suction paper 11. 3A shows a state before printing, FIG. 3B shows a state after printing, and FIG. 3C shows a state where the suction paper holding print table 12 and the suction paper 11 have moved downward after printing. The printing paste that has left 10 (the detached printing paste 19) adheres to the suction paper 11 and is separated from the substrate 10. Thereafter, the substrate 10 is discharged from the printing table 9, and the suction paper 11 is wound up on a reel, thereby enabling continuous printing. Further, by minimizing the winding amount of the suction paper 11, it is possible to reduce the amount of use and to prevent the printing stage from being stained at a low cost.

  The above embodiment is a case where a conductive paste is printed on an aluminum foil having a rectangular hole. In order to improve electrical characteristics, the printing paste 17 has a rectangular hole 20 as shown in FIG. It was a case where it was necessary to print so as to spread to the inner surface. Not only in such a case, when a part of the printing pattern of screen printing is equal to a part of the shape of the substrate, when there is a hole or an edge in contact with the printing pattern of the printing paste, In such a case, the printing table contamination countermeasure mechanism of the present invention can be applied. Further, the printing material fixing method of the present invention can be applied to screen printing on a foil body that is generally easily deformed.

1 is a perspective view showing a configuration of a screen printing machine according to an embodiment of the present invention. Explanatory drawing of the plate separation phenomenon in the screen printing which concerns on this invention. FIG. 2A is a cross-sectional view showing a state where a substrate is pressed by a metal thin plate, and FIG. 2B is a cross-sectional view showing a screen plate separation phenomenon during printing. FIG. 2 is a schematic cross-sectional view showing a positional relationship among a printing stage, a suction paper holding printing stage, a substrate, and suction paper according to the present invention. 3A is a cross-sectional view before printing, FIG. 3B is a cross-sectional view after printing, and FIG. 3C is a cross-sectional view showing a state in which the suction paper holding printing stage and the suction paper are moved downward after printing. Figure. FIG. 4A is a perspective view before screen printing, and FIG. 4B is a perspective view after screen printing, showing a foil-like substrate according to the present invention. FIG. 5A shows a conventional screen printing machine, FIG. 5A is a schematic diagram of the arrangement of printed materials and suction paper for continuous printing in the screen printing machine, and FIG. 5B is an illustration of superimposed printed materials and suction paper. Sectional drawing which shows the state supplied on the printing table.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing mechanism part 2 Supply mechanism part 3 Ejection mechanism part 4,10 Printed material 5,11 Suction paper 6 Suction paper winding shaft 7 Printed material winding shaft 8,9 Printing table 12 Suction paper holding printing table 13 Metal thin plate 14 Suction Hole 15 screen plate 16 printing pattern 17 printing paste 18 squeegee 19 detached printing paste 20 rectangular hole 21 cutout

Claims (8)

  In the printed material fixing method for fixing a foil-shaped printed material to a printing table of a screen printing machine, a cutout portion corresponding only to a portion to be printed is provided on the printed material arranged on the printing table. A printed material fixing method, comprising: a metal thin plate that is provided and has a shape that covers a non-printing portion of the printed material and is larger than the printed material.   The method for fixing a printing material according to claim 1, wherein the printed material is pressed against the printing table by adsorbing the metal thin plate onto the printing table.   The method for fixing a printed material according to claim 1, wherein the printed material is a foil-like body having a rectangular hole.   In the printing table contamination countermeasure mechanism for preventing contamination by printing paste on the printing table of the screen printing machine, the printing table for fixing the printed material on the foil and the printing paste detached from the printing material are attached to the printing table. A suction paper reel for supplying and discharging suction paper for preventing adhesion to the lower side of the substrate, and a suction paper reel on the discharge side for printing, and the suction paper in contact with the substrate from below during printing, and after printing And a suction paper holding print table movable so as to separate the suction paper from the printing material.   5. The print table contamination countermeasure mechanism according to claim 4, wherein the substrate is a foil-like body having a rectangular hole.   In a screen printing machine that performs printing at a high throughput on a printed material that is easily deformed, a cutout portion corresponding to only a portion to be printed of the printed material is provided and a non-printed portion of the printed material is A fixing printing table that holds the printed material by fixing a thin metal plate larger than the printed material on the printed material, and a printing paste detached from the printed material is attached to the surroundings. A suction paper reel for supplying and discharging suction paper for preventing the adhesion of the printing material to the lower side of the printed material, and a suction paper reel on the supply side and the discharging side for printing, and the printing paper is brought into contact with the printed material from below to perform printing. A screen printing machine comprising: a suction paper holding printing table that is movable so as to separate the suction paper from the substrate to be printed later.   The screen printing machine according to claim 6, wherein the fixing printing table has a vacuum suction mechanism for sucking the metal thin plate.   The screen printing machine according to claim 6 or 7, wherein the substrate is a foil-like body having a rectangular hole.

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