name plate production process
1、Machine Addition Forming The signage production adopts the machined and formed paint, so that the installation dimensions are unified and can be mass produced. The processing requirements of the instrument's painting panel are stricter, requiring experienced pliers and milling machines, and conditional CNC drilling machines.
2. Degreasing signage plate In order to make the surface of aluminum plate have a certain affinity for printing paint, oil stains on the surface of the plate must be removed. Generally, the package oil stain can be removed with soft sawdust, and then organic solvent is used to remove oil; Oil can be chemically deoiled with organic solvents or alkaline solutions.
3. Polishing There are scratches on the surface of the board. A layer of putty should be scraped first to make it smooth. According to the requirements of the customer, it is mechanical polishing, chemical polishing, or electrochemical polishing.
4, spray primer Because of the poor combination of aluminum alloy materials and topcoat, printing ink, in the aluminum alloy panel spray paint before spraying a layer of about 0.01mm thick epoxy zinc yellow primer.
5, spray paint According to customer requirements, spray the corresponding color of amino paint or acrylic paint. For light colored paints, especially white paint, the drying temperature and drying time should be strictly controlled, otherwise the white paint is yellowish.
6. Screen Printing The overall requirements for the printed signboard panel are: the position of the graphic and text is accurate and clear, the edge of the word line is neat, and the ink is firm.
(1) Screen. According to the thickness of the font line, select different mesh screens. The commonly used screens are 250T, 300T, 350T, 420S polyester screens. For monofilament diameter less than 1.5mm should choose more than 350 mesh monofilament yellow polyester mesh.
(2) Stretching angle. When the stretch angle is 22.5 ′, the area under the ink line is large, and the edge of the word line is neat.
(3) Scraper. The squeegee should be flat, with a Shore hardness of 65'-70', and the line contact should be guaranteed during printing. The squeegee of the printed signboard panel should be dedicated.
(4) Network distance. The large screen tension and small net distance are favorable for printing patterns. When the screen tension is determined, the network distance should be controlled within 2-3mm.
(5) Printing ink. Imported Japan's Toyo SS series, IPI series, Seiko series, made in Beijing Xiangyang brand 2711-4 instrument ink, glass ink and so on. If Tianjin Tianyi brand 8 head light offset ink needs to be dried below 120°C. The drying of the red panel paint is low temperature and short time.
7, spray varnish Brushes can be applied when the requirements are not high, the paint can use H-type water-soluble acrylic paint or amino paint.
8, packaging Signage plate due to the heavier sheets, easy to bump into each other, can be used in the finished product to protect the surface of old paper without pictures and text.