Manufacturing method of license plate of automobile

Abstract

The invention relates to the technical field of advanced manufacture, automated car and railway vehicles, in particular to an advanced manufacturing method of a license plate of an automobile appliedto an advanced drive-assisting system. The method sequentially includes the steps that injection molding is conducted, wherein license plate base materials with various shapes are formed through injection molding; pretreatment of the base materials is conducted, wherein the obtained base materials are subjected to dust removal and electrostatic eliminating; vacuum plating is conducted, wherein two vacuum plating layers, an indium alloy plating layer and an oxide protection plating layer are formed on the surfaces of the base materials through vacuum plating, the total thickness is smaller than 1 micrometer, and the thickness of the indium alloy plating layer is controlled within 10-60 micrometers; deplating is conducted, wherein according to the requirements of different automobile license plates, coating-resisting paint is coated on the vacuum plating layers; a colored paint layer is formed, a protection paint layer is formed, bonding with a base is conducted, and inspection and packaging are conducted. According to the manufacturing method of the license plate of the automobile, it can be ensured that the license plate has a good metal feeling, enough strength, high stability, long service life and good production qualification rate, and meanwhile the performance of a radar can be gave full play to as normal.

Description

technical field [0001] This project involves the technical fields of advanced manufacturing and automation of automobiles and rail vehicles, especially an advanced manufacturing method for a vehicle signage used in advanced driver assistance systems. Background technique [0002] As the name suggests, a car sign is a sign of a car brand. It is often pasted on the front and rear of the car, and its position is in the middle, for the purpose of marking and easy identification. Car signs generally have silver bright areas and color areas, such as Volkswagen signs Only the "V" and "W" patterns and the circle outside the pattern are bright silver, and the rest are color areas. The silver bright areas of various signs are different. Since existing vehicles are equipped with radar, it is necessary to ensure that the passage of radar waves does not affect the radar work for car signs, especially for vehicles with adaptive cruise systems. For such applications, it is important for c...

AI Technical Summary

Problems solved by technology

[0005] Patent CN103956573A provides a method for preparing a radar protective cover. The hot stamping step in the preparation process cannot effectively avoid the influence of dust, stains, water vapor and other factors in the air, thereby reducing the appearance compliance rate and product qualification rate of the product , the thickness of the indium-plated alloy nano-metal layer in the steps described in the patent is 5-50 nanometers. Although the transmission loss of the radar millimeter wave round-trip is guaranteed to be below 2db, the pass rate of the product in the actual production process is only 60%-68 %

[0006] The current development of the automobile industry has put forward higher requirements for the manufacturing technology of automobile signs, which not only have good metal texture, sufficient strength, high stability, long service life and good production pass rate, but also It has minimal impact on the transmission of radar electromagnetic waves and does not affect the performance of radar performance. However, it is difficult for existing technologies to meet the above requirements

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