CS222772B1 - Apparatus for uniform distribution of flow medium - Google Patents

Abstract

Device for evenly distributing the flow of medium, especially paste, to the printing center of machines for printing flat materials, especially textiles on screen printing machines, the printing tool of which is a flat or circular template. The invention solves the uniformity of the application of printing paste across the width of the goods, and its essence lies in the fact that it is formed by a channel with replaceable sleeves with holes, the size of which is determined by the position of the sleeve relative to the mouth of the channel and the consistency variables of the flowing medium

Description

(54) Apparatus for uniformly distributing the amount of flowing medium

Apparatus for uniform distribution of media flow, in particular paste for printing apparatus of machines for embossing flat materials, especially textiles on screen printing machines, whose printing tool is a flat or circular template. The invention solves uniformity of printing paste application over the width of goods. it consists of a channel with exchangeable bushings with holes whose size is determined by the position of the bushing relative to the channel mouth and the consistency variables of the flowing medium.

222 72

- / 222 772

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The invention relates to a device for the application of polystyrene fabrics on screen printing machines whose printing tool 3 is ^a flat or circular template. The feeding of the printing paste and the application paste onto the fabric via the template is carried out by means of a gravel or similar device.

The hitherto known devices consist of a hollow body of different cross-section, provided with a supply of printing paste inside the squeegee body and a mouth of various elastic and non-elastic materials, which is

print sealed against rotating circular template. The printing paste is supplied from the body to the mouth by a series of slits of a longitudinal, circular or other shape. The pressure squeegee mouth ensures that when the printing paste is supplied to the pressure squeegee which is secured by a pump or other conveying member. paste, where the pressure in the pressure squeegee body is higher than atmospheric pressure, that the pressure squeegee delivery and application system is pressure separated from the surrounding environment except for the perforation of the template. The pressure squeegee enables continuous application of the printing paste onto the printed material.

Flat or rotary stencil is a screen stencil used for screen printing, which is patterned in accordance with the pattern requirement.

Another device of the type described is a device for supplying paste to a printing press template, the application of which is a squeegee of various designs, for example of metal, rubber, plastics and combinations thereof. The actual device for feeding the paste in front of the closing device is usually designed as a supply channel,

- Jt222 772 in which fixed holes are made through which the paste is transported to the template ·

The pastes used in printing have a distinctly non-Newtonian character and are rheologically different from each other. The pressure losses in the flow of rheologically different liquids are different, which in the present embodiments results in an uneven flow in individual slots or holes and consequently different amounts of applied dye and hence color shade in the direction of the width of the printed material. pressure squeegees ·

The device according to the invention is intended to largely eliminate these drawbacks, in particular consisting of a channel with exchangeable bushings having apertures the size of which is determined by the position of the bushing relative to the channel mouth and the consistency variables of the flowing medium.

The device according to the invention allows a uniform flow of the printing paste. 1 is a side sectional view of one embodiment of the device of the invention; FIG. 2 is a side sectional view of another embodiment of the device of the invention.

The device according to the invention is formed by channels 2, ^{8 with} exchangeable sleeves 4 with holes 2. The printing paste flows from the channel 2 through the hole 2 either into the body 2 or in front of the closing member 2 of the printing machine. The size of the orifices 2 is a function of the distance of the sleeve 1 from the mouth of the channel 2 and the consistency variables of the flowing printing paste.

Holes from the sleeves 4 are made for a certain circle of rheologically similar printing pastes so that approximately the same amount of printing paste flows through all of the apertures, and the amount of deviation flowing through the amount of printing paste in each aperture is not reflected in the color. When the paste flows from the apertures 2 into the surrounding space of the separated body 2, the pressure along the length of the paste is nearly equal, thereby compensating for the pressure loss due to the flow of printing paste in the distribution channel. templates zatíracímu organ 2 3 ^e amount of printing paste evenly distributed along the length of the template.

Claims (3)

P ft E D MEASUREMENT E2U 222 772 Apparatus for uniformly distributing a quantity of flowing medium into several streams, characterized in that it comprises a channel (3) and replaceable bushings (1) with openings (2), determined by the position of the bushing (1) with respect to the mouth of the channel (3) ) and consistency variables of the flowing medium. Device according to claim 1, characterized in that the channel (3) is connected to the housing (7) by a housing (1) with openings (2). Device according to claim 1, characterized in that the channel (3) is connected via the sleeves (1) to the stencil space (5) via the closing member (9) of the printing machine.