Two-time hardening shower coating production line for mask of automotive headlamp

Abstract

The invention provides a two-time hardening shower coating production line for a mask of an automotive headlamp. Shower coating is carried out on a mask product by means of hardening shower coating production lines in two independent shower coating areas, the density of a material shower coated for the first time is higher than that of a coating shower coated for the second time, relatively low density material is shower coated for the second time, the flowability of the coating is more excellent, and it can be helpful to level a coating film shower coated for the first time to reduce the reject ratio of current ripple defects effectively, the current ripple risk is reduced obviously or avoided fully, so that a high coating film thickness and a perfect product appearance are considered. Aproducer can select common one-time shower coating or two-time shower coating on its own dependent on different product modeling difficulties and client coating thickness demands. Products obtained bytwo-time shower coating and one-time shower coating can be produced at the same time without transforming a jig and equipment additionally, so that the production flexibility is improved.

Description

technical field [0001] The invention relates to the field of coating equipment, in particular to a production line for twice-cured coating of automobile headlamp masks. Background technique [0002] With the rapid development of the automobile industry in China, the competition in the automobile industry is becoming more and more fierce. Various automobile groups are constantly introducing new ones, and they are constantly putting forward new requirements and new ideas for auto parts. At the same time, the performance requirements are constantly changing. Strict, especially the headlight mask of the car is the most severe part of the lamp. At present, in the design and production of the headlight, transparent polycarbonate plastic is usually used because of its excellent optical properties and impact toughness. Plastic for injection molding of the mask. However, polycarbonate plastics are not hard enough to be scratched, and are easily corroded by chemicals and oxidized and...

AI Technical Summary

Problems solved by technology

The existing measure to increase coating thickness is to increase the density of curtain coating coating, but due to the increase in density, the viscosity of the coating increases, the fluidity becomes poor, and the defects and risks of paint film flow marks increase accordingly, which is easy to appear on the product surface ( Especially for the increasingly complex mask shape design) to form paint flow marks, which cannot be eliminated after curing to form scrap, especially for new shapes or special shapes that are not suitable for paint leveling (such as stepped surfaces, large curved surfaces) The proportion of defects is higher and cannot be achieved Taking into account the high coating thickness and perfect appearance, the cured coating coating process widely used in the automotive lamp manufacturing industry currently has a large risk of flow mark defects, making it difficult to increase the thickness of the hardened coating and cannot meet the growing demand of customers. Durability requirements and complex modeling requirements

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