CS230783B1 - A method of applying crumbs to the ends of ceramic insulators - Google Patents

Abstract

The invention relates to a method of applying ceramic chips to the ends of ceramic insulators for electrical engineering, which are cemented into fittings. The essence of the invention is that a single layer of chips is evenly applied to a carrier tape, preferably made of paper or plastic, provided with an adhesive surface, then the tape prepared in this way is cut into parts, the length of which is identical to the circumference given by the diameter of the insulator shafts increased by twice the height of the chips on the tape, and the chips and the tape are glued to the ends of the insulators, the chips are glued to the surface of the insulator.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a method of applying ceramic crumb to the ends of electrical insulating ceramic insulators which are cemented into fittings.

The hitherto conventional method of applying the pulp is such that the pulp is poured onto the rotating ends of the insulator, coated with an adhesive composition which is applied by brush, roller or other conventional method. In addition to the firing properties, the adhesive composition must have the properties necessary to maintain relatively heavy grains on the insulator surface. The viscosity can only move within narrow tolerance limits so that it does not run off with the adhesive mixture. In this way of application of the pulp, the grains are unevenly distributed. In case of unsuccessful scattering, the end of the insulator must be cleaned from the pulp and the adhesive mixture and the process of applying the pulp must be repeated under more unfavorable conditions when the end is already wet. The control of the uniform application of the pulp is currently only visual and cannot be automated without a complicated optical sensor control device which would have to be alternately tilted and moved away from the surface of the insulator ends to avoid being hit by the spray glaze.

These drawbacks of the present process are overcome by the method of depositing crumb on the ends of the ceramic insulator according to the invention, which consists in that a simple layer of crumb is uniformly applied to the carrier tape, preferably of paper or plastic, provided with an adhesive surface. the tape thus prepared is cut into parts whose length corresponds to the circumference given by the diameter of the ends of the insulator increased by twice the height of the pulp on the tape, the cutting direction of the tape being perpendicular or oblique to its longitudinal axis.

The invention will be explained and described in more detail on a possible embodiment of the invention:

- 2 Example:

230 783

The INC insulator, type C 8-550, has a shaft diameter of 0 120 mm and a construction height of 1220 mm. The height of the bulk crushed section should be 0.6 to 0.8 d, where d is the diameter of the shaft. In this case, the height of the section is 90mm. The pre-prepared black paper tape with the adhesive sticks uniformly adhered is unwound from the reel tray and the parts are cut in length to allow the end of the insulator to be fully wrapped. With a double-sided chip height of 3 mm and a shaft diameter as indicated, this will be the length:

i = (a + 2 V) / JT where 1 s tape length v = crumb height.

At the ends of the insulator, an adhesive composition is applied in a known manner, and the crumb prepared on the tape is adhered to it to be crushed into the adhesive composition so that the carrier tape remains on the outer surface. The crushing rate of the pulp application is thus reduced to below 1%, while at the time of the method used to pour the pulp into the adhesive mixture up to now it has reached more than 10% in some periods. The carrier tape was made of black paper (weight 90 g / m), with the pulp glued with conventional rubber glue Ghlorprén. It was wound on a reel. The uniformity of the pulp application was checked optically by a sensor (the application is being prepared). The ends of the wrapping tape were cut with a knife adjacent the side of the paper so as not to blunt the blade. The cuts were oblique to the longitudinal axis of the tape at an angle of 45 °, so that even distribution of the grains of grains even at the point of contact of both ends of the tape after gluing to the insulator was guaranteed. In spite of the greater tolerance of the dimensions of the shafts in the production, an oblique cut is recommended. The length of the cut tape piece was increased by 127 mm (00.f2) compared to the above calculation, so that the length of the piece from tip to tip was 513 µm. The tape was glued to the ends of the insulators by hand.

Claims (4)

• 1. A method of applying crumb to the ends of ceramic insulators, characterized in that it is uniformly applied to a carrier tape, preferably of paper or plastic, provided with an adhesive surface. a simple layer of pulp, whereupon the tape thus prepared is cut into pieces the length of which is identical to the circumference given by the diameter - the ends of the insulator, increased by twice the amount of grit on the tape, and crushed with tape to the ends of the insulators, crushed to the surface of the insulator. 2. Method of depositing the pulp according to point Mixture for gluing the pulp to the insulator * 1, characterized in that the adhesive is applied to the ends of the insulators. 3. A method according to claim 1 wherein the adhesive composition for adhering the debris to the insulator is applied to the debris on a tape. 4. A method according to claim 1 _, characterized in that the adhesive composition for adhering the pulp to the insulator is applied simultaneously to the tape and the insulator while the end of the insulator is wrapped with the pulp tape.