JP2619748B2 - Flexo printing machine for corrugated cardboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated cardboard printing machine for printing pictures, symbols, numbers, etc. on corrugated cardboard paper (hereinafter, referred to as corrugated cardboard) cut to a required size.

[0002]

2. Description of the Related Art A printing machine with an impression cylinder facing upward and a plate cylinder facing downward is used for printing on a corrugated cardboard surface. The corrugated cardboard is cut into a predetermined size and stacked on a feeder unit, from which the corrugated cardboard is fed horizontally to the printing unit one by one, and sent out to the delivery unit. Between the feeder unit and the printing unit, there are a delivery roll and a receiving roll which form a pair to vertically deliver the cardboard horizontally. In the printing unit, the impression cylinder and the plate cylinder are paired up and down.

[0003]

The cut plate ball has cutting waste coming out of the cutting opening. Many of such cutting wastes are shaken off from the cutting opening at the time of cutting, or fall off when being sent out from the feeder unit. However, some of the cuttings are not completely separated and protrude from the cutting opening, and other cuttings are pressed into the cutter and are in close contact with the cutting opening. Cause.

[0004] That is, the cutting waste carried into the printing unit is separated from the cutting opening by the adhesive force of the ink and adheres to the plate cylinder, and is transferred to the corrugated cardboard therefrom, thereby creating a stain on the printing surface. .

In the present invention, therefore, most of the cutting wastes which cause such printing defects are 1 to 3 mm in width and 1 to 8 cm in length.
Note that it is in the form of lint or tape, and this is adhered to the receiving roll between the feeder unit and the printing unit, actively separated from the corrugated cardboard, so that it is not transferred to the corrugated cardboard again. Is to try.

[0006]

Corrugating printing machine 14 according to the problem-solving means for the] Namely, the present invention is for a corrugated board 12 are supplied to perform printing during the impression cylinder 11 and plate cylinder 12 which form a vertical pair, the impression cylinder 11 On the corrugated cardboard supply side of the printing unit 21 in which the plate cylinder 12 forms an upper and lower pair, a sending roll 15 and a receiving roll 16 forming an upper and lower pair are provided, and an adhesive rubber surface layer 17 is laminated on the surface of the receiving roll 16. A wiping device 18 that comes into contact with the surface of the receiving roll 16, and the receiving roll 16 is moved from the delivery roll 15 to the wiping device 18 in the rotation direction of the receiving roll 16 along the supply direction of the cardboard 13. A doctor device 19 in contact with the surface is provided, and a nozzle 20 for spraying the cleaning liquid toward the surface of the receiving roll 16 is further provided.

[0007] Between the wiping device 18 and the feeder unit 22, several pairs of sending rolls 23 and receiving rolls 24 for horizontally transporting the cardboard 13 can be provided.

For the adhesive rubber surface layer 17, butyl rubber, soft polyurethane rubber, or the like provided with adhesiveness by isobutylene or the like is used.

The wiping device 18 includes a pad 25 made of a nonwoven fabric or other cloth and a support 26 for the pad 25.

An air cylinder 27, a solenoid valve, or the like may be attached to the support 26, and the pad 25 may contact the rubber surface layer 17 to perform a wiping action as required.

The support table 26 is supported so as to slide on a rail 28 parallel to the axis of the roll 16 so that the pad 25 moves left and right to wipe the rubber surface layer 17. You can do it.

The pad 25 may be folded and gripped by the support 26 (FIG. 1), or it may be wound into a roll and passed over the support 26 from the delivery roll 29 to the take-up roll 30. It can be sent out (Fig. 2
And FIG. 3).

The doctor device is constituted by one or several doctor knives 19.

A cleaning unit 31 composed of a receiving roll 16, a wiping device 18, a doctor device 19, and a nozzle 20 is housed in a cabinet 32 and is separated from a printing unit 21 and a feeder unit 22.
It is preferable that the cleaning liquid ejected from 0 does not scatter to the printing unit 21 or the feeder unit 22.

An upper and lower pair of an impression cylinder 11 and a plate cylinder 12, and
And a sending roll 15 and a receiving roll 16 which form a pair,
Each one is on the top and the other is on the bottom,
They only need to face each other up and down (FIGS. 3 and 4). The present invention can be implemented by modifying a conventional cardboard printing machine . FIG. 1 illustrates a case where two-color printing is performed in a conventional three-color corrugated cardboard printing machine, in which a printing unit on a feeder unit side is modified into a cleaning unit 31, and The receiving roll 16 is formed by winding a butyl rubber sheet having an adhesive property to be the adhesive rubber surface layer 17 around a plate cylinder.

FIG. 3 shows a conventional three-color printing press for corrugated cardboard.
FIG. 1 shows a case where the present invention is implemented by modifying the
On the knit side, a sending roll and a receiving roll that form
Vignetting and rubber 17 is baked imparted with tacky surface of that delivery rolls 16.

In the drawing, reference numeral 33 denotes an ink roll for transferring and supplying ink to a plate cylinder, and reference numeral 34 denotes a delivery unit for receiving printed cardboard.

As the cleaning liquid, an organic solvent or a detergent aqueous solution that does not dissolve the rubber surface layer 17 is applied.

[0019]

As described above, cardboard printing according to the present invention.
In the machine 14, a receiving roll 16 whose surface is covered with an adhesive rubber surface layer 17 and is in contact with the printing surface of the cardboard 13, a wiping device 18 for wiping the surface of the roll 16, and a position before the wiping device 18. A cleaning unit 31 is provided between the printing unit 21 and the feeder unit 22. The cleaning unit 31 includes a doctor 19 acting on the surface (17) of the receiving roll and a nozzle 20 for spraying the cleaning liquid onto the receiving roll 16.

For this reason, the cutting waste 35 adhered to the cardboard 13 is first separated to the rubber surface layer 17 of the receiving roll 16, and the cutting waste 35 attached to the receiving roll 16 is removed by the wiping device 18. Before being wiped off by the wiping device 18, the receiving roll 16 is wiped off from the rubber surface layer 17.
Is scraped off from the rubber surface layer 17 of the wiping device 1.
8 is hard to accumulate the cutting waste 35.

Therefore, there is no danger that the cutting waste 35 adhered to the receiving roll 16 remains on the rubber surface layer 17 without being wiped by the wiping device 18.

Further, when the cutting waste 35 is stuck to the receiving roll 16 and cannot be scraped off by the doctor device 19, it is easily scraped off from the receiving roll 16 by the cleaning liquid sprayed from the nozzle 20. Can be cleanly removed from the rubber surface layer 17.

Then, the corrugated cardboard from which the cutting waste has been removed is immediately sent to the printing unit.
Printing trouble due to cutting waste is completely eliminated.

According to the results of practical tests, in the printing of pharmaceutical cardboard cases where rework of printing is not allowed,
By performing the present invention, the defective printing rate with dust, which has occurred as much as 5 to 6%, has been drastically reduced to 0.1% or less, which is almost 0%.

[Brief description of the drawings]

FIG. 1 is a sectional side view of a cardboard printing machine according to the present invention.

FIG. 2 is a sectional side view of a cleaning unit of the cardboard printing machine according to the present invention.

FIG. 3 is a sectional side view of the cardboard printing press according to the present invention.

FIG. 4 FIG. 2 is a cross-sectional side view of a cardboard printing machine according to the present invention.
is there.

[Explanation of symbols]

 11 impression cylinder 12 plate cylinder 13 cardboard 14Printer  Reference Signs List 15 sending roll 16 receiving roll 17 rubber surface layer 18 wiping device 19 doctor 20 nozzle 21 printing unit 22 feeder unit 23 sending roll 24 receiving roll 25 pad 26 support base 27 cylinder 28 rail 29 sending roll 30 winding roll 31 cleaning unit 32 Cabinet 33 Ink roll 34 Delivery unit 35 Cutting waste

Claims (1)

(57) [Claims] A cardboard (13) between an impression cylinder ( 11) and a plate cylinder ( 12).
In a corrugated cardboard printing machine 14 for supplying and printing a corrugated cardboard, a delivery roll 15 and a receiving roll 16 forming an upper and lower pair are provided on the corrugated cardboard supply side of an upper and lower impression cylinder 11 and a plate cylinder 12,
An adhesive rubber surface layer 17 is laminated on the surface of the receiving roll 16, and the wiping device 1 is brought into contact with the surface of the receiving roll 16.
8 is provided, and the wiping device 1 is moved from the delivery roll 15 in the rotation direction of the receiving roll 16 along the supply direction of the cardboard 13.
8. A corrugated cardboard printing press, comprising: a doctor device 19 which comes into contact with the surface of the receiving roll 16 during a period of 8; and a nozzle 20 for jetting a cleaning liquid toward the surface of the receiving roll 16 .