Corrosive Metal Sign Making Process

Corrosive metal signs are also called etched signs. Mainly check the convex metal sign or concave metal sign made by three steps of processing by mask and post-etching processing.

Corrosion metal sign making process:

1) Blanking: According to the size of the drawing (layout size), plus burrs of not less than 5mm on all sides. 720 type pedal shears are used for shearing. The surface is required to be flat and there is no gross around.

2) Surface treatment of metal corrosion signs:

(1) Mechanical polishing: Use a 2.2-4 kW polishing machine to mechanically polish the wool. The cloth wheel uses a 300-350 motor and the speed is generally 2000-3000 rpm.

(2) Alkali treatment: cook the metal plate with 10-15% sodium hydroxide in an aqueous solution of 65-85 ° C for 10-30 seconds, then wash it with water, and immerse it in a 5% aqueous solution of heavy acid.

(3) Powder treatment method: Use a flat brush dipped in the old powder (double powder) to scrub the ears with a uniform cross method. Listen to it until the effect of removing dirt or oxygen skin is removed, and then use a 5% potassium dichromate aqueous solution. Closed.

(4) Wire drawing method: wire drawing is performed on the surface of the metal plate by mechanical or manual wire drawing to achieve the regeneration effect of the metal surface.