SU645061A1 - Device for determining printing parameters of fabric-printing cylinder machine - Google Patents

Description

i-. one

The invention relates to the field of fabric dyeing processes and can be used to determine the printing modes on the bulk of the fabric printing machines.

The iljBecTeH device for determining print modes on a web-type printing machine, contains a table with means for attaching a woven fabric to it, and drives for its rotation and translational movement in a horizontal plane, a print body made in the form of a disk, and fitting to press the print body to the woven material 1.

However, the need to progressively move the table with the woven material in the horizontal plane complicates the design of the device.

The aim of the invention is to simplify the design of the device.

This is achieved by the fact that the printing body is made in the form of a cone, the top of which is located on the axis of rotation of the table, and the device for pressing the print body to the woven material is made in the form of interchangeable weights.

Performing the print in the form of a cone eliminates the drive for the translational movement of the table in the horizontal plane.

2

FIG. 1 schematically shows the proposed device; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a view along arrow B in FIG. one.

The device for determining print modes contains a table 1 with means for fastening woven material 2, made in the form of a clamp 3, and a drive for its rotation (not shown in the drawing), a printing body 4 made in the form of a cone, the top of which is located on the axis of rotation of the table I , capacity 5 for paint, the lower edges of the walls of which are shaped along the profile of the cone 4.

The cone 4 by means of the bearing 6 is fixed on the spindle 7, which is mounted on the axis 8 and is equipped with a replaceable load 9. On the axis 8 fixedly relative to the spindle 7 is installed ratchet wheel 10, interacting with the pawl 11.

The container 5 is mounted on the rod 12, having a screw 13 of the vertical adjustment of the position of the container 5 and mounted on the lever 14 mounted on the axis 15.

On the table 1, a cam 16 is fastened to retract the printing organ 4 from the table I.

Work on the device as follows.

The desired substrate 17 is placed on the table 1 and the fabric 2 is secured with the clamp 3. The spindle 7 rotates about the axis 8 with the retracted dog 11 and the printing organ 4 is lowered onto the fabric. To create the necessary clamping force of the cone 4, the corresponding weight 9 is suspended on the spindle 7.

A container 5 is installed above the cone. A screw 13 regulates the size of the gap between the surface of the cone 4 and the edges of the container 5. The value h determines the thickness of the ink layer applied to the print organ and is set equal to the engraving depth on the printing shaft of the machine.

Table 1 is turned all the way to the back of the cam 16 into the spindle 7. The container 5 is filled with the test paint. The gearbox and table 1 are turned on, the rotation is generated at a constant known angular velocity (0). When the table rotates, the printing cone 4, due to the friction force, rotates around its axis and applies the test ink to the fabric.

After the table has made one revolution, the cam 16 with its working surface finds on the spindle 7 and pushes the printing cone 4 upwards together with the container 5. After the cam has come off, the printing cone 4 is held in the raised position by means of the ratchet wheel 10 and the pawl I.

Thus, the printing process on the roll machines is simulated, however, the cylindrical printing shaft of the machine on the instrument is replaced by a conical one. With this shape of the printing shaft, the printing speed, i.e., the speed of movement of the fabric relative to the shaft, varies along the table radius from 0 to co (R is the table radius).

In accordance with: this varies the radius of the quality of the resulting print, depending on the velocity gradients implemented during printing. Standard methods analyze the quality of the resulting print and determine the radius of the strip on which it is the best. The linear velocity of the tissue and the number of revolutions per minute n 6QV / nd of the printing shaft of the machine (d is the diameter of the shaft), which must be set for an optimal printing process, are determined.

To determine. the necessary force of pressing the printing cone 4 to the table 1, the above experience is repeated when using weights 9 with different weights. To normalize existing printing processes, it is necessary to compare a sample printed on the machine with a sample printed on the device. If the first sample does not match the quality with the best band of the second, then the printing and technical

the possibilities of ink are not fully utilized, and the printing mode on the machine must be brought into line with the printing mode of the best strip of the sample printed on the instrument.

The device can also be widely used in research laboratories engaged in the development and testing of printing inks.

Claims (2)

1. An instrument for determining printing modes on a roll-type printing machine, comprising a table with fastening means on a woven material and a drive for its rotation, a print organ and a device for pressing the print organ to the woven material, characterized in that, in order to simplify its construction, The printed organ is made in the form of a cone, the top of which is located on the axis of rotation of the table. 2. The apparatus according to claim 1, characterized in that the device for pressing the print organ to the woven material is made in the form of replaceable weights. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 434294, cl. G About IN 11/14, 1972. Vid U