JPH06179260A - Printing device of work - Google Patents

Abstract

PURPOSE:To contrive shortening of working hours, by performing printing by transferring paints to both the top and bottom of such a work of a plastic product to be used for a building material at a time. CONSTITUTION:The title printing device is constituted of a pair of coating rolls 4, 14 arranged at a distance in a vertical direction, form plate rolls 3, 13 transferring paints to the coating rolls 4, 14, a quantity-of-coating adjusting roll for supplying the paints to the form plate rolls 3, 13 and a pick up roll 12, a work W is carried in under a state wherein the pair of the coating rolls 4, 14 are turned in the opposite directions from each other, through which printing is performed by transferring the paints to both the top and bottom of the work W at a time while conveying the work W by performing pressing, pinching and holding of the work W by the pair of the coating rolls 4, 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work printing apparatus.

[0002]

2. Description of the Related Art Conventionally, a plastic product used for construction or the like may be printed with a grain pattern. A printing device 11a as shown in FIG. 2 is employed for such printing.

This printing apparatus 11a is a pickup roll 1 which is impregnated in a paint tank Ta and is rotatably supported.
2a, a plate roll 13a which is in contact with the pickup roll 12a and is rotatably supported, and the plate roll 13
coating roller 14a which is rotatably supported by contacting a
A doctor knife 15a for scraping off the excess paint attached to the plate roll 13a, and the coating roll 14 described above.
The pressure roller 16a is disposed above a and is rotatably supported in the opposite direction to the coating roller 14a.

Therefore, the paint is rolled up by the rotation of the pickup roll 12a and supplied to the plate roll 13a. After the paint is made uniform by the doctor knife 15a, it is transferred to the coating roll 14a and carried in via a carrying device (not shown). The applied work Wa is pressed and held by the pressing roll 16a and the applying roll 14a, and by rotating them in opposite directions, the paint adhered to the applying roll 14a is transferred to the lower surface of the work Wa for printing. It is a thing.

[0005]

By the way, since the printing apparatus 11a prints on one surface of the upper surface or the lower surface of the work Wa, when printing is required on both upper and lower surfaces of the work Wa, the printing apparatus 11a After the printing is completed, the work Wa is reversed and the other surface is printed. Therefore, the work Wa is introduced into one printing device 11a twice, or two printing devices 11a are installed in series to deal with the problem.

However, in such a printing method,
There is a problem that the printing efficiency is reduced because the printing time of at least twice the printing time of one side is required. Moreover, when two printing devices are arranged side by side, a large work space is required, and there is a drawback that the installation place is restricted.

Although a two-sided automatic printing machine is commercially available, not only is the structure of the machine complicated, but the machine itself is also large, and it requires a large space for installation and is expensive in price. Become.

The present invention has been made in view of the above problems, and provides a work printing apparatus capable of simultaneously printing on both upper and lower surfaces of a work by adding a simple structure.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a pair of coating rolls which are vertically spaced apart from each other and are rotatably supported in opposite directions, and a pair of coating rolls which are rotatable in contact with these coating rolls. Supported by a pair of plate rolls that transfer the coating material to the pair of coating rolls respectively, and a coating amount adjusting roll and a pickup roll that transfer the coating material to these plate rolls, and press and hold the work by the pair of coating rolls. It is characterized in that the paint transferred to the coating roll is printed on both upper and lower surfaces of the coating material while being conveyed.

[0010]

By guiding the work between a pair of coating rolls which rotate in opposite directions, the work is pressed and held by the coating roll and conveyed, and at the same time, the coating amount adjusting roll, pickup roll and plate are applied to these coating rolls. The paints transferred through the rolls are simultaneously transferred to the upper and lower surfaces of the paint to perform printing.

As described above, since the upper and lower surfaces of the work are simultaneously printed, the working time can be reduced to half as compared with the case of printing one surface at a time.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an outline of the overall configuration of the printing apparatus 1. The printing apparatus 1 includes a work upper surface printing unit 1A installed on the upper side of the work W to be carried in and a work lower surface printing unit 1B installed on the lower side of the work W, and the work lower surface printing unit 1B is a paint tank. T, a pickup roll 12, a plate roll 13, a coating roll 14, and a doctor knife 15, which are the same as those described in the section of the prior art, and detailed description thereof will be omitted.

The work upper surface printing unit 1A contacts the coating amount adjusting roll 2 and the coating amount adjusting roll 2 which is rotatably supported and which evenly spreads the coating liquid supplied through the coating material supplying nozzle N. Plate roll 3 rotatably supported
And a coating roll 4 which is rotatably supported in contact with the plate roll 3 and is arranged above the coating roll 14 which constitutes the work lower surface printing unit 1B, and the surplus of the coating roll 3 attached to the plate roll 3 described above. It is composed of a doctor knife 5 for scraping the paint.

In the printing apparatus 1 of the present invention having such a configuration, the work W is carried in through the carrying device (not shown) and guided between the coating rolls 4 and 14 which rotate in opposite directions to each other. W is pressed and held by the coating rolls 4 and 14 and conveyed, and at the same time, the coating material is transferred to the coating rolls 4 and 14 from the coating amount adjusting roll 2 and the pickup roll 12 through the plate rolls 3 and 13, respectively. Therefore, these paints are simultaneously transferred to the upper and lower surfaces of the work W for printing.

Then, when the work W is carried out from the coating rolls 4 and 14, the printing on both sides of the work W is completed.

[0017]

As described above, according to the present invention, a simple structure in which a coating roll and a coating amount adjusting roll for transferring the coating material to the coating roll are added instead of the pressing roll in the conventional printing apparatus, Since it is possible to print on both the upper and lower sides of the work piece at the same time, it is possible to reduce the processing time without being restricted by the installation space.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the overall configuration of a printing apparatus.

FIG. 2 is a schematic diagram showing the overall configuration of a conventional printing device.

[Explanation of symbols]

 1 Printing device 2 Coating amount adjusting roll 3 Plate roll 4,14 Coating roll 5,15 Doctor knife 12 Pickup roll

Claims (1)

[Claims] 1. A pair of coating rolls which are vertically separated from each other and are rotatably supported in opposite directions, and a pair of coating rolls which are rotatably supported in contact with these coating rolls. A pair of plate rolls that transfer paint respectively,
It consists of a coating amount adjusting roll and a pick-up roll for supplying paint to these plate rolls, and it is possible to convey the work by pressing and holding the work by these pair of coating rolls and at the same time printing the paint transferred to the coating rolls on both upper and lower sides thereof. Characteristic work printing device.