JPS6090761A - Printing on object with tiered face - Google Patents

Abstract

PURPOSE:To eliminate the occurrence of defective products by printing an object by one-time process by a method in which plural pads are used according to tiered faces, the transferring pressures of the pads are equalized, and plural printing pressures are also equalized. CONSTITUTION:In the process to transfer pads 7 from a plate 4, the diameter of the fitting bar 9 of the pad 7 is made larger than the fitting diameter (d1) of the receiving plate 8 of the pad 7, and the distance (l1) from the receiving plate 8 to the printing face of the pad 7 is made constant. Printing pressures when transferring ink from the plate 4 to the pad 7 are received by applying the large diameter (d2) of the pad fitting bar 9 to the pad receiving plate 8. In printing an object 1 of a tiered face, the pad fitting bar 9 is extended until printing pressures are equalized for each tiered face by the weight of the pad 7 and a spring 10, a stopper 11 is put into the groove of the bar 9 and fixed, and printing pressures when printing object 1 to be printed are received.

Description

[Detailed description of the invention] The present invention relates to a method using pad printing.

When printing desired characters, patterns, etc. (2) on a molded product with steps (1) as shown in Figure 1, it is possible to print each step lid surface once, but it is possible to print each step cover surface once, It was difficult to print on all the uneven surfaces.

When printing on such a level difference surface, as shown in Figure 2 (Jig (3)
) is used to make it flat.

If the printing section is made flat in this way, it is possible to print by other normal methods such as silk 2 clean printing and offset printing in addition to band printing, but it takes a lot of work to attach and detach the jig before and after printing. Also, as shown in Figure 1 (when printing on a product where the printing surface with each step cannot be separated), it is not possible to print the entire step surface in one process using normal silk screen printing or offset printing. As shown in Figure 3 (intaglio or letterpress printing surface + 41K), apply the remaining ink (5) to the flexible band (6) once, and as shown in Figure 4 (this pad (6) can be used as a molded product). (1) Pad printing method (off-cent printing, octopus printing using a pad) in which printing is carried out by pressure bonding to the plate.In band printing using an intaglio plate, ink is left only in the concave areas of the plate surface, so unnecessary ink remaining on the plate surface is scraped off. Therefore, it is necessary to scrape the plate surface with a doctor blade, and it is therefore mechanically difficult to create a step on the plate surface corresponding to the step on the printing medium, and it is necessary to use a flat plate.

For this reason, in the process of first transferring ink from the plate surface to the pads, if each pad has a step difference, the printing pressure applied to the pads will vary, making uniform printing difficult. As a countermeasure for this, as shown in Figure 5 (set the position of the band so that the printing surface of the pad is almost parallel to the printing plate, and in that state transfer the ink from the printing plate to the first step to cover the uneven surface. When press-bonding to a printing material, the pad position is set at a position where the printing surface of the band is parallel to the printing material so that the printing pressure between the pad and the printing material is uniform, and then printing is performed.

In this method, pad compression (printing pressure) is uniformly applied to each pad, and each pad is fixed at a position where stable printing is possible.

Next, the present invention will be explained in more detail using examples.

Example (1) As shown in Fig. 5, in the process of transferring 71K ink, the pad (installation of the force receiving plate (8) (dl) (7)
Make the diameter of the mounting rod (9) thicker (and print by applying the thicker diameter part (d2) of the pad throat mounting rod (9) from the plate (8) to the pad receiving plate (8). receive.

Next, when printing on a printing material (molded product) (I) with a step, the printing pressure is applied to the step surface when printing on the pad mounting rod (9) using the gravity of the pad (7) or, if necessary, a spring (10). The stopper (11) is inserted into the groove (121) of the band attachment rod (9) and fixed to receive the printing pressure when printing on the printing material (1). By using this structure, the pressure applied to the pad is kept constant by changing the position of the band when receiving ink from the plate and when printing on the printing material.

Example (2) As shown in FIG.
) and when receiving ink from the printing plate, use the cylinder (
Apply pressure from (14) of 13) and lift it onto the pad (7) and fix it so that the pad (7) is on the same plane.

(When printing on a printing medium il+ with KVC steps (
15) Apply more pressure and lower the cylinder. At this time, the cylinder is positioned using a stopper (16) so that a constant pressure is applied when each band (7) comes into contact with the printing object, and then the pad (7) is lowered to perform printing. (10th
Figure) Example (3) Similarly to Example (2) above, as shown in Figure 11, the pad (7) is attached to the cylinder (13) (pressure is applied from the 11 part, and the pad (7) is on the same plane). Place the ink on the pad (7) in this position.

Next, when the same pressure is applied from the (18) part of the cylinder +131', the pad (7) lowers until it comes into contact with each stage surface of the printing material il+, and after that, the cylinder pressure is applied and printing pressure is applied, and each pad (7) A certain pressure is applied to...

The present invention has the above-mentioned structure, and it is possible to print molded products that are difficult to print in a single process in a single process by dividing the pad, which saves time and reduces defects. little (naru)

[Brief explanation of the drawing]

FIG. 1 is a front view of a molded product (1) having a stepped surface,
Figure 2 is a schematic diagram of the conventional printing method using a jig.
FIGS. 3 and 4 are also schematic diagrams of the conventional method of printing with one pad, and FIGS. 5 to 8 are illustrations of the embodiment +1 of the present invention. FIG. 9 and FIG. 10 are process schematic diagrams regarding the method of Example (2), and FIGS. 11 and 12 are process schematic diagrams regarding the method of Example (3). It is a diagram. (1)...Printing material (2)...Printing (3)...
・Jig (4)...Print surface (5)...Ink (6)
... Band (7) ... Pad (8) ... Receptacle is plate (9) ... Mounting rod 00) ... Spring Old) ... Stopper (121 ... Groove (131 ...・Cylinder (16+...stopper patent applicant Kazuo Suzuki, representative of Toppan Printing Co., Ltd. -1 Figure 1 Figure 2 Figure 3 Figure 41 Figure 6 Figure 8)

Claims (1)

[Claims] Desired characters, patterns, etc. are transferred from a plate to a flexible elastic pad, and this is pressed against a printing medium having a stepped surface,
In a printing method of printing ink transferred to a pad, a plurality of pads are used depending on the stepped surface, and a band is transferred from a plate. Printing on a printing medium having a stepped surface, characterized in that the transfer pressure of a plurality of pads is the same, and the printing pressure of the plurality of pads becomes uniform when printing on a printing medium having a stepped surface. Method.