Method for fabricating electrician-layer press plate by employing maple birch material

Abstract

The invention relates to a method for making electrical laminates using maple birch material, comprising the following steps: (1), cooking the maple birch species, removing cellulose and lignin from the species, and then rotary cutting; (2) 1. Coating modified phenolic resin on the veneer, and then drying at low temperature; (3) Assembling blanks into blanks; (4) Obtaining electrical laminates through high temperature pressing. The electrical laminated board prepared by the method of the present invention has high mechanical strength, good oil absorption rate, good compatibility with transformer oil, and better electrical performance than the electrical laminated wood produced by birch, and can be widely used in high-voltage transformers Production of lead brackets, pressure plates, and upper and lower iron yoke insulation. Russia and North Korea are adjacent to my country, and the economic situation is not good. Maple birch species are abundant, and the cost advantage is not lower than domestic raw materials. It is conducive to the healthy development of the electrical laminated wood industry and reduces the number of domestic industries Due to the shortage of raw materials, the high production cost of enterprises cannot continue to operate.

Description

technical field [0001] The invention relates to the technical field of manufacturing electrical laminates, in particular to a method for manufacturing electrical laminates using maple birch material. Background technique [0002] In the current industry, electrical laminated wood is the main insulation material for oil-immersed power transformers in the electrical industry. It is used to produce transformer insulation supports, insulation end rings, upper and lower iron yoke insulation, lead brackets, upper and lower foot pads, etc., to produce high withstand voltage levels. , Good oil absorption rate, and good compatibility with transformer oil. Electrical laminated wood requires high-quality broad-leaved tree species. At present, the world’s best quality electrical laminated wood is produced in Germany. They use high-quality beech raw materials to produce electrician Laminated wood, but there is no such broad-leaved economic tree species in my country, and birch veneer is us...

AI Technical Summary

Problems solved by technology

[0002] In the current industry, electrical laminated wood is the main insulation material for oil-immersed power transformers in the electrical industry. It is used to produce transformer insulation supports, insulation end rings, upper and lower iron yoke insulation, lead brackets, upper and lower foot pads, etc., to produce high withstand voltage levels. , Good oil absorption rate, and good compatibility with transformer oil. Electrical laminated wood requires high-quality broad-leaved tree species. At present, the world’s best quality electrical laminated wood is produced in Germany. They use high-quality beech raw materials to produce electrician Laminated wood, but there is no such broad-leaved economic tree species in my country, and birch veneer is used instead of beech for continuous production. On April 1, 2015, all state-owned forests in my country were closed to stop logging