Production method of self-adhesive coating for electrical steel

Abstract

The invention discloses a production method of an electrical steel self-adhesive coating. The method comprises the steps of: 1) cold-rolling electrical steel into a finished product; 2) cleaning and drying; 3) annealing treatment; 4) controlling the plate temperature below 50°C, and controlling the solid content of the self-adhesive coating solution to 35 ~60%, viscosity 40~70S; 5) Adopt two-roller or three-roller type to carry out continuous coating, and evenly apply the self-adhesive coating solution to the surface of the electrical steel strip; 6) Baking the electrical steel strip, baking The baking time is 50-70s, and then the temperature of the electrical steel strip is cooled to below 70°C; 7) coiling, the coiling tension is 20-30N / mm2; 8) lamination, and then continuous curing for 1-3 hours. The production method of the electrical steel self-adhesive coating of the present invention can continuously produce the self-adhesive coating with stable bonding performance by taking multiple measures of coating coating, coating drying, and controlling the state of the electrical steel sheet before and after coating coating. Self-adhesive coating products for electrical steel with high bonding strength.

Description

technical field [0001] The invention relates to the technical field of special coatings, in particular to a production method of an electrical steel self-adhesive coating. Background technique [0002] In the existing motor manufacturing process, the silicon steel is usually welded, bolted or riveted to fasten into an iron core after being punched and laminated, but the above connection methods may have the following problems: (1) This will lead to deterioration of the magnetic performance of the iron core, which will affect the operating efficiency of the motor; (2) Only a part of the iron core is fastened, which is prone to noise during magnetization resonance; (3) Only part of the iron core is fixed, which cannot be used for fastening Highly demanding working conditions are not suitable for micro motors. [0003] In order to solve the above-mentioned possible problems of welding, bolting or riveting, the iron core laminations are currently fixed by applying a self-adhesi...

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Problems solved by technology

[0002] In the existing motor manufacturing process, the silicon steel is usually welded, bolted or riveted to fasten into an iron core after being punched and laminated, but the above connection methods may have the following problems: (1) This will lead to deterioration of the magnetic performance of the iron core, which will affect the operating efficiency of the motor; (2) Only a part of the iron core is fastened, which is prone to noise during magnetization resonance; (3) Only part of the iron core is fixed, which cannot be used for fastening Highly demanding working conditions, not suitable for micro motors

[0007] Since the coating and drying process window of the self-adhesive coating is narrow and there are many influencing factors, only by optimizing part of the coating process and coating curing measures, the bond strength of the self-adhesive coating obtained is not high, which may As a result, the bonding performance of the self-adhesive coating is not very stable after reaching the passivation state

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