SU1735056A1 - Press for printing on hollow cylindrical articles - Google Patents

Abstract

Use: application of color reproductions on cylindrical hollow objects. The printing machine contains a revolving head rotating around a horizontal axis with products mounted on it, a printing device, plate cylinders, colorful devices containing a colorful reservoir, duktor, receiving and rubbing cylinders, transfer and roll rollers, crankshaft levers around one axis with knurled rollers mounted on them, power cylinders, threaded bushings. Crank levers in the form of earrings, L-shaped mounts, swivel links, rollers and bolts pivotally connected to each other and other elements to press the rolling rollers to the forme cylinder are installed in the inking machine. 3 silt

Description

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The invention relates to printing equipment, in particular to printing presses designed to apply color reproductions to cylindrical bed objects.

A known multi-color printing machine with a replaceable printing group, in which the rolling rollers are pressed to the printing cylinder by means of a compression spring fixed between the suspensions with the rolling rollers, the eccentrics in contact with the suspensions and the stop pins for fixing the eccentrics.

The disadvantage of this machine lies in the rigid fixation of the working position of the rolling rollers. Since the forme cylinder has a non-continuous cylindrical surface — grooves for fastening the cliches, the rolling rollers will jump into these grooves during operation.

springs, and again enter into contact with the working surface of the plate cylinder with a blow, which entails rapid wear of the surface of the rolling rollers.

Closest to the proposed invention, the technical essence is a printing machine for applying color images on pipes, cases or similar products with a rotating turret, on which products are placed and with a printing device, in which several ink devices are arranged around the printing roller, each of them which contains a colorful reservoir, ductor, rubbing and receiving cylinders, transfer and roll rollers, cranked levers with a mounted around one axis bubbled on the form roller levers, actuating cylinders, rods of which are connected to bell cranks, and a power cylinder body soVJ

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united with threaded bushings pivotally mounted in the frame panel of the inking unit.

The disadvantage of the known machine is that in one pair of power cylinders piston cavities work, and in the other - rod ones, as a result of which the knurling rollers are pressed against the surface of the plate cylinder with different forces, which negatively affects the print quality.

The purpose of the invention is to improve the quality of printing.

This goal is achieved by the fact that in a printing machine on hollow cylindrical articles containing a revolving head rotating around a horizontal axis with products mounted on it and a printing device in which the forme cylinders and colorful apparatus containing the ink reservoir are located along the outer perimeter of the printing roller. , ductor, receiving and rubbing cylinders, transfer and rolling rollers, cranked levers with knurled rollers mounted on them, power cylinders, threaded bushings, according to According to the invention, the rod of each power cylinder is pivotally connected to a pair of bend arms made in the form of earrings by means of L-shaped rods, and the threaded bushings are connected to bolts that can be reciprocated without rotation in the holes of the forks pivotally connected through pivoting links with L-shaped t gami.

1 schematically shows a fragment of a printing machine; figure 2 is a view of And figure 1; Fig 3 - section BB in Fig.2.

A printing machine for hollow cylindrical articles consists of a turret 1 with cylindrical articles 2 mounted on it, a printing roller 3, forme cylinders 4 (in particular, four) and inks 5.

Ink 5 contains a reservoir 6, a ductor 7, a receiving 8 and a rubbing 9 cylinders, a transfer roller 10 and a rolling roller 11.

On the crank levers 12 and 13, each made in the form of an earring rotating around the ramming cylinder 9, the rolling rollers 14 and 15 are placed (Fig. 3). Cranked levers 12 and 13 are connected to L-shaped rods 16 and 17 by pins 18 and 19, and L-shaped rods are connected to rods 20 of power cylinders 21 by trunnions 22. Power cylinders 21 can rotate around axes 23. L-shaped The glands 16 and 17 are pivotally connected by pins 24 and 25 with pivoting links 26 and 27, which by means of pins 28 and 29

connected to forks 30 and 31, in the holes of which bolts 32 and 33 are installed with the possibility of reciprocating movement; Bolts 32 and 33 are connected to threaded bushings 34 and 35, having

possibility of rotation around their axes. The printing machine works as follows.

When the machine drive (not shown) is turned on, the ductor cylinder 7 rotates and draws paint from the ink reservoir 6. The paint is transferred by the transfer roller 10 through the receiving cylinder 8, the roll roller 11 and the rubbing cylinder 9 to the rolling rollers 14 and 15. At the same time, the paint

frayed and rolled evenly over the surfaces of the knurling rollers.

Then the working fluid or air is supplied to the piston cavities of the power cylinders 21, after which the forces arising

in the power cylinders 21, are transmitted by the rods 20 to the L-shaped joints 16 and 17, which turn the crank levers 12 and 13 around the rubbing cylinder 9 and press the rolling rollers 14 and 15 to the surface

plate cylinder 4, transfer to it a layer of paint. The ink in the form of a pattern falls from the plate cylinder 4 onto the printing roller 3, and from the printing roller a color print is applied to the products 2 mounted on

turret head 1.

The angles of rotation of the crankshafts 12 and 13 when actuating the power cylinders 20 may differ due to the different diameters of the knurling rollers 14 and 15, which is compensated by the rotation of the L-shaped bar r 16 and 17 and the power cylinders 21 around the axes 23.

The angle of rotation of each pair of crank levers 12 and 13 is adjusted by rotating the threaded sleeves 34 and 35,

when rotating, the bolts 32 and 33 unscrew or screw into the threaded bushings, thereby increasing or limiting the angle of rotation of the crank levers, and hence the onslaught of the knurled rollers 14 and 15 on

plate cylinder 4.

Replacing four power cylinders with different working cavities with two cylinders with a working piston cavity simplifies the pneumatic circuit of the machine, and the forces transmitted through the rods and bend levers from the rods of the power cylinders to the rolling rollers are almost the same, which improves print quality and ensures uniform wear of knurling rollers.

Claims (1)

The invention The printing machine for printing on hollow cylindrical products, containing a revolving head mounted on a horizontal axis for supplying products, a printing device including a printing roller, inks with cylinders in contact with it and colorful devices installed in housings containing a colorful reservoir in contact with each other , receiving and rubbing cylinders, transfer and roll rollers, and cranks installed in pairs on the corresponding axis, carrying arms that roll contacting with form0 five cylinder, power cylinders, the rods of which are connected to the crank levers, and threaded bushings mounted in colorful housings, characterized in that, in order to improve print quality, the stem of each power cylinder is hinged to a pair of crank levers made in the form of earrings, by means of L-shaped tg, while the latter are connected by means of forks pivotally connected to them via rotary links and installed with the possibility of reciprocating movement in the forks of forks of bolts with threaded bolts by the streets. ka