JPS6132754A - Gravure printing press - Google Patents

Abstract

PURPOSE:To obtain the titled printing press capable of printing not only the front surface but also the back surface of a sheet, by making it possible to change over the rotation of a gravure printing roll in positive and reverse directions and providing a third roll in the direction opposite to a press roll through the printing roll in a spaced-apart state. CONSTITUTION:A gravure printing roll 1 is positively rotated and a doctor blade 10a is allowed to approach said printing roll 1 and a sheet 14 is passed to print the back surface thereof. The gravure printing roll 1 is reversely rotated and a doctor blade 10b is allowed to approach the gravure printing roll 1 while the sheet 14 is passed on the printing roll 1 through a free roll 13 and turned by a pressure roll 2 to also print the front surface of said sheet 14. By this method, not only the front surface but also the back surface of the sheet can be printed by one printing press.

Description

[Detailed description of the invention] 〔Technical field〕 This invention relates to a gravure printing machine.

[Background technology]

Resin V-) such as polyvinyl chloride and film can/-
In processing and extrusion processes, it is common practice to print patterns on sheets and films. FIG. 4 shows polyvinyl chloride (A'l 5) processed into a sheet using a calender 16, passed through an embossing throw/L' 17 and a cooling drum 18, and printed on a gravure printing machine 19. The printed sheet 21 is wound up with 1l 120. It shows the winding process.

However, in the conventional process, only the back side of the sheet 21 is printed by the gravure printing machine 19, and the front side of the sheet cannot be printed by the same printing machine 19.

[Purpose of the invention]

An object of the present invention is to provide a gravure printing machine capable of printing on the front or back side of a sheet.

[Disclosure of the invention]

The gravure printing machine of the present invention includes: a gravure plate roll that can be switched between forward rotation and reverse rotation; a pressure roll that presses the plate roll through a sheet and presses the sheet onto the plate roll; first and second rolls which are provided in front and rear of the plate and which transfer the y-) through the plate rolls in a forward rotating state;
and a third roll, which is provided in the opposite direction and separated from the plate roll, and sends the sheet from the first roll to the second roll over the plate roll while rotating in the opposite direction of the first plate roll. be.

An embodiment of the present invention will be described based on FIGS. 1 to 3. FIG. 1 is a perspective view showing the gravure printing machine of this embodiment. In Fig. 1, 1 is a gravure plate roll;
2 is a pressure roll. Gravure plate RO/I/1 is connected to drive motor 3 via clutch 4.5 and gear 6.7, and can be switched between forward rotation and reverse rotation by operating clutch 4.5. Further, the pressure roll 2 is pressed against the plate roll 1 by pressure cylinders 8 provided on both sides thereof, and the sheet passing between them is pressed onto the plate roll lvI for printing. An ink pan 9 is provided at the bottom of the plate roll 1, and doctor blades 1QIk and 10b are attached to the plate roll before and after the plate row A/1, respectively. It is used depending on the direction. In addition, these doctor grades 10a and 10b are outside of the plate low A/1.
At the front, rear, and below the ink pan 9 are the first. Second
and a third free roll 11, 12° 13 are respectively attached.

Next, the operation of this embodiment will be explained based on FIGS. 2 and 3.

^ When printing on the back side of a sheet, as shown in Figure 2, the rotation direction of the gravure plate roll 1 is set to forward rotation using the clutch 4.5, and one of the doctor-zoot V
- Move the grade 101 close to the plate loaf L/1, and move the other grade 10b away from the plate loaf I/1.

In this state, printing is carried out through sheet 14.

(6) When printing on the surface of the sheet As shown in Figure #13, rotate the gravure plate Low/I/1 in the opposite direction with clutch 4.5, and press one of the doctor grade 1
0m away from the plate roll l, and bring the other doctor grade 10b close to the plate roll A/1. Also, sheet 14
passes from the first free roll 11 to the third 7 leaker 7S/ia below the plate roll 1 and passes through the second 7 leaker 12
, and there -d, et al.
Printed through the top.

Turn with pressure low A/2.

In this embodiment, the pressure roll 2 is placed above the gravure plate roll 1, and the third tree row/L'l 3t is placed below.
? The arrangement may be such that the pressure roll /I/2 is placed below the gravure plate roll/l/1 (D) and the free roll x3tRIrj is placed above in the opposite direction to this pressure roll.

〔Effect of the invention〕

According to this invention, there is an advantage that the front or back side of a sheet can be printed with a single printing machine incorporated into a normal sheet processing line.

[Brief explanation of drawings]

Fig. 1 is a perspective view of one practical example of this invention, Fig. 2 is an explanatory diagram of the printing state on the back side of a sheet, Fig. 3 is an explanatory diagram of the printing state on the front side of the sheet, and Fig. 4 is an illustration of a normal sheet processing line. It is an explanatory diagram. 1... Gravure plate roll, 2... Pressure roll, 4° 5... Clutch, 10m, 10b-Vl! -fu V
-Y, 11- $ 1 +0717- o -A/,
12 ・= 2nd (2J 713-low〃, 13-・
3rd free roll, 14 shaft sheet

Claims (1)

[Claims] A gravure plate roll that can be switched between forward rotation and reverse rotation, a pressure roll that presses the plate roll through a sheet and presses the sheet onto the plate roll, and a press roll that is provided in front and rear of the plate roll and rotates in the forward direction. first and second rolls for transporting the sheet through the plate roll in a reverse rotation state; sheet first
The third roll sent from the first roll to the second roll over the plate roll
Gravure printing machine with rolls.