SU36237A1 - Adaptation to paint roller roller machines to prevent paint squeezing on the ends of rollers - Google Patents

Description

In FIG. 1 and 2 depict diagrams of paint roller roller machines; FIG. 3 and 4, the proposed adaptation in two projects.

The transfer from the drum to the drum is due to its adhesion to the rollers and the different speeds of rotation of the rollers as follows: on a paint roller with a horizontal roller, according to FIG. 1, of the drawing and on the raskotterke with a vertical arrangement of rollers according to FIG. 2 drawings.

The amount of paint rubbed by the machine per hour is equal to the amount of paint removed by the knife from the front drum of the machine. On the upper half of the drum, from which the paint is removed with a knife, the latter goes in an even thin layer, and the productivity of the machine can be expressed as follows:

Va mc ABOUT . Z. l 60,

where a is the thickness of the paint layer on the first roll, V is the volume of paint,) is the diameter of rolls, Z, is their length, is the p-number of revolutions of the first roller per minute.

The average roller of the paint mill rotates at a slower speed, but must supply the same amount of paint per hour that the front roller carries per hour.

(251) -.

The thickness of the layer on the underside of the middle drum will be

1 t

where n is the number of revolutions of the transferring drum per minute, / l is the number of revolutions. average drum per minute; or

I1

That is, the thickness of the paint layer during normal operation of the machine carried by the front and middle rollers is inversely proportional to the speeds of rotation of these rollers. Usually, in practice, the thickness of the paint layer on the front and middle rollers does not follow this rule, namely, the rear drum is not pressed, as a result of which the front drum does not have time to remove all the paint that the middle roller brings, and the paint is squeezed onto the edge of the rollers. With proper adjustment of the rollers, the paint squeeze is reduced to a pjo minimum.

The paint is loaded into the box of the machine and drawn in by the middle and rear rollers. The cheeks of the box do not allow the drawn in paint to be squeezed onto the edges of the rollers.

The middle roller brings the paint from the rear roller to the front roller and the paint is pushed between the front roller.

and middle rollers. Here, to squeeze the paint onto the edges, there are no obstacles, and if the rollers are installed incorrectly, the paint will be more or less strongly squeezed onto the edges of the rollers.

Recently, attempts have been made to install special knives on the edges of the rollers, which would direct the paint from the edge | K to the center of the roller. So, by installing the knives on the edges of the middle drum, you can direct the paint to the middle of the drum And, therefore, back into the box of the machine. Installing a knife on the front drum case is somewhat more complicated. Attempts to make such knives at the X2 3 plant in Yaroslavl did not give good results.

Giving great importance to the moment of tearing the edges of the rollers, how much time the cracker has, and the pairing of the paintbrushes into the aggregates, the author offers a special device that fully; destroys the extrusion of paint onto the edges of the rollers even if they are not completely adjusted.

The fixture consists of hollow bars, wooden or metal (gun metal), installed between the first and middle rollers. The bars are fixed on special stands attached to the frame. The uprights are equally well and conveniently fixed on the frame like that of a spray gun with a vertical arrangement of rollers, and with an arrangement of rollers in a horizontal plane. The bars are installed between the front drum and the medium ones, much smaller in size than the cheeks in the loading box of the machine. The bars are fastened to the racks with bolts 4, clamping the bar on both sides. The bars have longitudinal notches 5 into which the bolts 4 are inserted. Because the notch is slightly larger than the diameter of the bolt 4, the bar can be carefully pressed against the rollers 2, 3 with all of their position.

The drawing shows the bars 1 of the simplest design. But it is possible to design them in such a way that the bars are pressed against the rollers by means of a spring. The pressing force of the bars to the rollers in this case can be changed at will. Such a system has the advantage that the bars will always be pressed against the rollers, regardless of the distance between the (front and middle) rollers pressed against them.

The bars of the shape of the surface, KOJOroy they are pressed against the rollers, are completely similar to the cheeks of the loading machine boxes and can be of two kinds, depending on whether the rollers have bevels or not. In case rollers 2, 3 have bevels, the cheeks of the box of machines and bars of the proposed device are pressed against the bevels, otherwise - directly to the surface of the rollers from the edges. .

The subject matter of the invention.

Adaptation to paint roller roller machines for the prevention of squeezing paint on the ends of rollers, characterized by the use of wedge-shaped timber 1 7, installed on the edge of rollers 2, 5, at the point of contact of the latter.

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