SU84461A1 - Method of making laminated materials - Google Patents

Description

The invention relates to a method for producing laminated electrical insulating materials based on paper or fabric impregnated with bakelite or other varnishes.

The existing method of manufacturing laminated electrically insulating materials based on bakelite paper or fabric (getinax or textolite) by hot pressing packages made of an appropriate number of sheets of paper or fabric pre-impregnated with bakelite or other varnish is laborious and does not provide uniform quality of material and observance of necessary tolerances on thickness.

According to the proposed method, electrical insulating laminates of the type of getinax and textolite are made in the form of long strips of uniform quality over the entire area and with a thickness kept within sufficiently tight tolerances.

This is achieved by passing the required number of strips of paper or fabric simultaneously through an appropriate number of varnish devices and directing them in parallel with a parallel beam through an existing chamber, a heating device, and then passing between heated gauge rollers.

FIG. I and 2 schematically illustrate embodiments of a method for producing laminates.

Dry paper or fabric is continuously fed into a conventional adjustable device. L The upper and lower sheets are coated with bakelite varnish, for example, the “OF” or “OK” marks on both sides. The coating device 2 is portable depending on the fabrication of a particular thickness of material.

The varnished paper or fabric is further supplied to the existential chamber 3. The paper whitening is performed using high frequency currents in combination with hot air circulation.

In the existing chamber, as a result of a stable heat treatment process, volatile products are rapidly removed to a set limit and the melting point of the resin rises dramatically.

No. 84461-2 -

Next, dried bakelite paper paper or fabric passes a beam between the electrodes 4 of the high-frequency generator, thereby melting the resin and transferring it from stage A to stage B.

Then a bundle of paper or tacapi enters the first pair of rolls, heated by steam to a temperature of 155-165 °, and, pakopets, on the second, calibrating a pair of rolls 5. The upper rolls of the forward roll along the vertical axis of the HC have high pressure supplied by the pump.

Depending on the brand of the product being manufactured, the required specific pressure is created with the help of pizh rolls, and the pressure on the first pair of rolls is somewhat lower than on the second.

The finished material is wound around a volumetric hollow drum 6, having a forced drive, which is connected with the whole machine.

A snare drum with roTOBOii and | K) can be trapsported by a MO / CAT in a special chamber or sent directly to rewind or cutting material on sheets of the required size.

In order to simplify the filling of the device, the drying chamber is made detachable.

Ma ftg. Figure 2 shows a schematic representation of the production of layered materials from pre-bakeltizing paper or fabric, thereby eliminating the need for lacquer and varnish.

Subject invention

The method of making layered materials on a basis of paper or fabric impregnated with bakelite or other varnishes is also so that, in order to make it possible to manufacture these materials in the form of long ribbons of a given thickness, the required number of strips of paper or fabric is passed through the appropriate varnishes. n is directed by a parallel beam through the drying chamber, an heating device and between the heated calibrating rollers.