RU2258007C2 - Variable folder - Google Patents

Abstract

FIELD: polygraphic engineering, applicable in polygraphic rolling machines.

SUBSTANCE: the structure provides for installation of a cutting mechanism for moving relative to the cylinders of the transverse folding and for individual adjustable drive for the cutting and stick cylinders. Use is made for additional hold-down cylinder engageable with the cylinders of transverse folding, the diameters of all the cylinders are multiple of the relation of the maximum length of cutting of paper fabric to number Π.

EFFECT: expanded production potentialities, simplified structure, reduced cost for production of machine.

1 dwg

Description

The invention relates to the printing industry and can be used in roll printing machines.

A known folding apparatus comprising a longitudinal folding mechanism in the form of a folding funnel, pulling devices, a cutting cylinder and a cylinder group including a folding knife blade, a valve cylinder and a second transverse folding cylinder (see Heidelberg Printing Systems. Offset Printing Machines. Study Guide. Moscow, MGUP Publishing House, 1999).

A significant drawback of such a folding machine is the limited technological capabilities due to the inability to use it to produce products of various formats that differ in cutting length.

Closest to the claimed invention is a folding apparatus comprising a longitudinal folding mechanism in the form of a folding funnel, pulling devices, a cutting mechanism, folding folding conveyors, a cylinder group for transverse folding. The pulling devices have an individual drive, and the cutting mechanism and the cylinder group are equipped with a common drive (see German patent No. 4241810, IPC B 41 F 13/56, published June 16, 94).

Significant disadvantages of the known folding apparatus are:

- limited technological capabilities of the device due to the inability to use it in a flexible stepless regulation of product formats along the length of the cutting;

- the need to create a number of folding machines for receiving products of various lengths of cutting formats;

- the combined drive of the cutting mechanism and the cylinder group of the transverse folding does not allow for a different cutting length of the paper web;

- folding ribbon conveyors complicate the design of the folding apparatus, require a separate drive with pulse control from the sensor, as well as pneumatic devices for changing the position of the conveyors;

- format matching of products using pulling devices or transverse folding devices can be carried out in a narrow range of lengths relative to one nominal cutting format (for example, when cutting 578 mm as a result of regulation, after the first transverse bend, the production size is 289 + 4 mm).

Each of the existing folding machines is used to obtain only one series of product formats determined by the cutting length, that is, the diameters of the transverse folding cylinders. Thus, to obtain any other number of formats along the cutting length, it is necessary to use cylinders of other diameters.

The objective of the invention is the creation of a folding apparatus of variable format with high technological capabilities, providing all the necessary series of product formats while simplifying the design of the apparatus.

The problem is solved in that in a known folding apparatus comprising a folding funnel, pulling devices, a cutting mechanism in the form of a block of cutting and marz cylinders, a drive, transverse folding cylinders and devices for laying out notebooks, according to the invention, the cutting mechanism is mounted with the possibility of moving relative to the transverse cylinders folding, cutting and marz cylinders are equipped with an individually adjustable drive and an additional clamping cylinder is provided, interacting with the cylinders erechnogo folding, the diameters of all cylinders are multiples relative maximum length cutting of the paper web to the number π.

The claimed invention has differences from the prototype in essential features:

- the cutting mechanism is mounted to move relative to the transverse folding cylinders;

- cutting and marzan cylinders are equipped with individually adjustable drive;

- provides an additional clamping cylinder that interacts with the transverse folding cylinders;

- the diameters of all cylinders are a multiple of the ratio of the maximum length of cutting of the paper web to the number π.

Therefore, the proposed invention meets the criterion of "novelty."

The installation of the cutting mechanism with the ability to move relative to the transverse folding cylinders ensures the transfer and positioning of cut sheets of various formats in the cylinder valves, eliminates the need for additional sheet transfer devices, simplifies the design of the folding apparatus, and reduces metal consumption.

The use of an individual adjustable drive for cutting and marz cylinders makes it possible to obtain products of a format that is variable in length along the length of cutting with unchanged diameters of transverse folding cylinders, which significantly expands the technological capabilities of the folding apparatus.

The introduction of an additional clamping cylinder interacting with the transverse folding cylinders ensures accurate sheet transfer from the cutting zone to the transverse folding cylinders, thereby increasing the reliability of the folding apparatus while simplifying the design.

The constancy of the diameters of all transverse folding cylinders and their multiplicity of the ratio of the maximum blade cutting length to the number π ensure high folding quality and the possibility of using a folding machine of one model for the production of products of various formats, eliminate the need to create folding machines of various lengths of cutting format rows, leading to a significant reduction costs for the design and manufacture of printing machines, as well as the production of printed products.

In the proposed solution, all the distinguishing features are interconnected and, in combination with other features, provide a new technical result: expanding the technological capabilities of the folding machine, simplifying its design, reducing the cost of creating printing machines and producing printed products. But in general, the solution paves the way for the creation of universal variable-format roll presses.

Therefore, the proposed solution meets the criterion of "inventive step".

The invention is illustrated in the drawing, which shows a schematic diagram of a folding apparatus of variable format.

Folding apparatus of variable format contains a folding funnel 1, pulling devices made in the form of pairs of paper rolls 2 and 3, a cutting mechanism and transverse folding cylinders. The cutting mechanism is a movable block, consisting of a cutting 4 and marzana 5 cylinders, mounted in the walls of the folding apparatus with the possibility of stepless movement relative to the transverse folding cylinders. Knife pads 6 are mounted on the cutting cylinder 4, and marzans 7 are mounted on the marz cylinder 5.

Cylinders 4 and 5 have an individual servo drive 8 controlled by a programmable system. The diameters of the cutting 4 and marzana 5 cylinders correspond to the accepted maximum length of cutting the blade and remain constant during production with any other shorter cutting lengths.

The cylinder group for transverse folding includes four cylinders: presser 9 with pressure pads 10, feed 11, provided with grippers 12, cylinder of the first transverse bend 13 and cylinder of the second transverse bend 14. The pressure pads 10 of the pressure cylinder 9 together with the periphery of the supply cylinder 11 create a base surface to capture the cut blanks of notebooks. The diameter of each of these cylinders is a multiple of the ratio of the maximum blade cutting length accepted for a given type of equipment to the number π and is unchanged for any other cutting lengths.

The distance between the cutting point A and the capture point B of the notebook in the cylinder group is not constant and can be varied by the stepless movement of the cutting unit 4 and the marz 5 cylinder relative to the pressure cylinder 9 depending on the required cutting length. This movement of the block ensures the positioning of the leading edge of the cut-off blank of the notebook (of any format) relative to point B in time with the operation of the cylinder group of the transverse folding.

The transverse folding cylinder group and pulling devices have independent drives with uniform angular speed for any cutting cycle, while the angular speed of the cutting 4 and marzan 5 cylinders changes during the cycle under the influence of the programmed drive 8.

Folding machine variable format works as follows. The paper web from the folding funnel 1 is fed to the paper rolls 2 and 3, captured by them and held in the cutting zone (point A). When the interaction of the knife pads 6 of the cutting cylinder 4 and the marzans 7 of the marzee cylinder 5, the cutting of the blade. The installation of a cutting unit 4 and a marzan 5 cylinder for a specific cutting format (distance AB) is carried out in the process of preparing the folding machine for use. An individual programmable drive 8 provides the required length L of a cut-out notebook by changing the rotation speed of the cutting 4 and marz 5 cylinders, which is not constant within one cyclic revolution, but at the time of cutting coincides with the linear speed of the paper web. The cut-off blank of the notebook is captured by the pressure pads 10 of the pressure cylinder 9 and the periphery of the feed cylinder 11 of the transverse folding cylinder group at the gripping point B behind the leading edge, receiving the necessary acceleration, and is carried out into the lateral bend formation zone by the grippers 12 of the supply cylinder 11. All further folding and output products are produced by conventional known methods.

The application of the invention will simplify the design of the folding machine and significantly expand its technological capabilities, so that one folding machine can be used to produce products of different lengths of cutting formats in different printing machines, as well as significantly reduce the cost of creating printing machines and printing production.

Claims (1)

Folding apparatus of variable format, comprising a folding funnel, pulling devices, a cutting mechanism in the form of a block of cutting and marzan cylinders, a drive, transverse folding cylinders, devices for laying out notebooks, characterized in that the cutting mechanism is mounted with the possibility of movement relative to the transverse folding cylinders, cutting and marzan cylinders are equipped with an individually adjustable drive and an additional clamping cylinder is provided that interacts with the transverse fold cylinders Nia, the diameters of all cylinders are multiples relative maximum length cutting of the paper web to the number π.