Glaze-coated sand method of electrified railway contact net rod-shaped porcelain insulator

Abstract

The invention discloses a glaze-coated sand method of an electrified railway contact net rod-shaped porcelain insulator. The method comprises the following steps of: firstly, manufacturing porcelain sand with required granularity, then coating glaze, naturally shade drying the glaze-coated porcelain sand and sieving the sand with a sieve set, wherein the sand in the sieve set is the qualified glaze-coated sand; and uniformly coating a layer of bonding agent in a sanding control line on a glaze-coated blank, and uniformly spreading the glaze-coated sand, wherein sand lacking or sand stacking is required to be avoided. The method has the advantages that: by the method, the mechanical property of porcelain surface and cemented parts is greatly improved; bending resistance and tensile strength of the product are enhanced; the sand, the glaze and the porcelain blank are fully bonded, and the sand grains are difficult to be stripped from the porcelain blank; and the sands of the sintered product are fixedly bonded on the porcelain blank by the molten glaze layer, and a dead corner problem is avoided.

Description

technical field [0001] The invention relates to a glaze-sand coating method for porcelain insulators, in particular to a glaze-sand coating method for rod-shaped porcelain insulators of electrified railway contact nets. Background technique [0002] In the production process of rod-shaped porcelain insulators, in addition to the structural strength of the porcelain part itself affecting the bending strength of the product, the quality of the glue between the porcelain part and the accessories also directly affects the mechanical properties of the product. In the parts where the porcelain parts need to be glued, the porcelain parts are first glazed. The purpose of glazing is not only to make the surface of the product beautiful and stain-resistant, but also to effectively improve the surface properties of the porcelain parts and prevent micro-cracks on the surface of the porcelain parts. diffusion to enhance the mechanical properties of porcelain parts; after glazing, in the ...

AI Technical Summary

Problems solved by technology

However, there are disadvantages in the glazing and sanding process commonly used in China.

This is because the sand grains themselves are irregular in shape, and the glaze is applied after the sand grains adhere to the porcelain body. There is a place where the sand and the porcelain body are not in complete contact, forming a dead angle, and the glaze may not be able to invade this part. Therefore, sand, glaze and porcelain The bond between blanks is not very sufficient

[0003] Not only that, in the traditional process, sand and porcelain body often adopt similar formula, the expansion coefficient of sand is greater than or equal to the expansion coefficient of porcelain body, and the compressive stress cannot be formed on the porcelain body, if the temperature change exceeds the tensile strength of the porcelain body If it is, it will cause the sand particles to peel off the porcelain body