Plastic surface treatment is the use of physical, chemical, mechanical and other methods in the plastic surface processing, surface treatment is to meet the particularity of the product, such as corrosion resistance, wear resistance, decoration or other special requirements, called secondary processing; The secondary processing of plastic surface is divided into four categories: printing, laser, coating and electroplating. I. Printing The printing on the plastic surface includes screen printing, pad printing, heat transfer printing, hot stamping, etc. The principle of screen printing: screen printing is through the extrusion of the scraper, so that the ink is transferred to the substrate through the mesh of the graphic part, forming the same picture and text as the original. The principle of pad printing: pad printing, also called curved surface printing, is to first put the ink into the engraved text or pattern gravure plate, and then copy the text or pattern to the rubber, and then transfer the text or pattern to the surface of the plastic molding product, and finally through heat treatment or ultraviolet light irradiation and other methods to cure the ink. The principle of thermal transfer printing: the pattern is printed on a special release paper with sublimate ink in advance, and then the pattern is transferred to the plastic film, the advantage of thermal transfer is to transfer the pattern or pattern from the film or paper film to the working surface with heat. Transfer or hot stamping process, only need to hot the printed object once, you can transfer a variety of color patterns on the glue. This can reduce the defective rate of rubber parts, the picture is beautiful, and it can be completed with ordinary hot stamping machine and heat transfer machine. Simple operation, exquisite printing, low production cost. The product loss is small, the added value is high, the process is decorative. High covering power, strong adhesion. Meet the green printing standards, no environmental pollution. Hot printing principle: Hot printing is the use of special foil, at a certain temperature to transfer the text and pattern to the surface of plastic products; The advantage is that the method does not require surface treatment and can be printed with a simple device. In addition, it can also print products with gold, silver and other metallic luster. Two, laser Radium engraving, also known as laser printing technology, is a printing method that uses the high energy held by the laser to directly print the text and pattern to the surface of the material. According to the different printing methods, it can be divided into scanning laser and shielding laser. The principle of the scanning laser machine: The scanning laser machine is a method of using two lenses equivalent to the X axis and Y axis to control the laser light and print out the desired pattern or text on the substrate; The advantage is good at printing small text; The drawing data is controlled by computer and is suitable for small batch production.
The principle of the shielded laser machine: using the shielded laser machine, the pattern and text must be made in the template in advance, and then the laser can be carved through the template according to its projection; The advantage is that the time required for each printing is extremely short, which is suitable for mass production. Three, painting Coating is the construction of paint on the coated object, so that it forms a solid coating film, the formed protective film can prevent or delay the external damage to the object, so that the life of the material can be extended. The coating also has a decorative effect, giving the surface of the object to be painted with color, and the appearance of various effects can be obtained; The coating also has special characteristics, such as anti-static, anti-corrosion, insulation and so on. 
Four. Electroplating In simple terms, plastic electroplating refers to the electrolytic reaction in solution with the help of external direct current to deposit a metal layer or alloy layer on the surface of the plastic. Vacuum coating Products that are coated at a higher vacuum will be coated with a thin film substrate in a vacuum evaporation machine and vacuum pumped with a vacuum pump. The vacuum degree in the coating reaches 1.3×10-2 ~ 1.3×10-3Pa, and the high-purity aluminum wire (purity 99.99%) is melted and evaporated into gaseous aluminum at a temperature of 1200℃ ~ 1400℃ by heating the crucible. Gaseous aluminum particles are deposited on the surface of the moving film substrate and reduced by cooling to form a continuous and bright metal-aluminum layer.
Welcome to customize: Plastic Injection Mould, IMD Technology, Plastic Injection parts, Silicone Rubber Mould, Prototyping.
