Corrosive metal signs are also called etching signs. Mainly check the embossed metal sign or concave metal sign made by processing in three steps of mask and etching.
Manufacturing process of corrosive metal nameplate:
1) Blanking: according to the size required by the drawing (layout size), a rough edge of not less than 5mm shall be added around. The 720 type pedal plate shears shall be used for plate cutting, and the surface shall be flat without gross margin around.
2) Surface treatment of metal corrosion sign:
(1) Mechanical polishing: use a 2.2-4 kW polishing machine to mechanically polish the raw material. The cloth wheel uses a 300-350 motor with a general speed of 2000-3000 rpm.
(2) Alkali treatment: use 10-15% sodium hydroxide to boil the metal plate in 65-85 ℃ aqueous solution for 10-30 seconds, and then wash it with clean water, and immerse it in 5% diammonic acid aqueous solution.
(3) Powder treatment method: use a flat brush dipped in the old powder (double powder) to brush the plate evenly and listen to the cross method, until the dirt surface is removed or the oxygen skin is removed, and then seal it with 5% potassium dichromate aqueous solution.
(4) Wire drawing treatment: wire drawing treatment is carried out on the metal surface by mechanical or manual wire drawing to achieve the regeneration effect of the metal surface.
QQ