Label production process flow

Writer：admin Time：2023-06-08 10:23 Browse：℃

　　1. Machined metal signs are made by machining and painting to ensure uniform and standardized installation dimensions and mass production. The processing of instrument spray panels requires strict dimensional requirements and requires experienced pliers and milling workers. If conditions permit, CNC drilling machines can be used.

　　2. In order to make the surface of the aluminum plate have a certain affinity for the printing coating, the oil stains on the surface of the plate should be removed. Generally, the oil stains on the packaging can be first wiped off with a soft saw dust, and then degreased with an organic solvent; Oil stains in machining can be chemically removed using organic solvents or alkaline solutions.

　　3. If there are scratches on the surface of the polished board, a layer of putty should be applied first to make it smooth. According to the customer's requirements, mechanical polishing, chemical polishing, or electrochemical polishing should be chosen.

　　4. Due to the poor adhesion between aluminum alloy materials, topcoat, and printing ink, a layer of approximately 0.01mm thick epoxy zinc yellow primer is required before spraying topcoat on aluminum alloy panels.

　　5. Spraying topcoat: According to the customer's requirements, spray corresponding colors of amino or acrylic paint. For light colored paint, especially white paint, the drying temperature and drying time should be strictly controlled, otherwise the white paint will turn yellow.

　　6. The overall requirements for screen printed sign panels are: accurate and clear position of graphics and text, neat edges of character lines, and firm ink marks.

　　Metal signage production

　　(1) Silk screen. Choose different mesh sizes of silk screens based on the thickness of the font lines. The commonly used silk screens are 250T, 300T, 350T, and 420S polyester silk screens. For lines with a diameter of less than 1.5mm, single filament yellow polyester mesh with a diameter greater than 350 mesh should be selected.

　　(2) Angle of tension net. When the tension angle is 22.5 ', it can make the ink area under the character line large and the edges of the character line neat.

　　(3) Scraper. The scraper should be flat and pointed, with a Shore hardness of 65 '-70', ensuring line contact during printing. The scraper for printing the label panel should be dedicated.

　　(4) Net distance. High screen tension and small screen spacing are beneficial for printing clear graphics. When determining the screen tension, the screen spacing should be controlled between 2-3mm.

　　(5) Printing ink. The imported products include the Japanese Toyo SS series, IPI series, Seiko series, and the Chinese ones include Tianjin Xiangyang brand 2711-4 instrument ink, glass ink, etc. If using Tianjin Tiannv brand 8-character glossy offset ink in China, it needs to be dried at a temperature below 120 ℃. The drying of red panel paint requires low temperature and short time.

　　7. When the requirements for spraying glossy paint are not high, a brush can be used to apply, and the paint material can be H-type water-soluble acrylic paint or amino paint.

　　8. Due to the heavy weight of the packaging metal label, it is easy to collide with each other. Old paper without graphics and text can be placed in the finished product to protect its surface.