Highway Steel Guardrail Production Line and Production Technology of Epoxy Zinc-based Polyester Composite Coating

Abstract

The invention relates to a production line and process of a steel road barrier with an epoxy zinc-based polyester composite coating. The production line of the road barrier is a fully-automatic production line, the production line has the advantages of stable product quality, small labor amount and high efficiency in the process from strip steel loading to one-step finishing of product molding; the produced steel road barrier adopts a double-layer anticorrosive structure including a zinc-based epoxy coating and a polyester coating to replace the traditional hot galvanizing, hot galvanizing and polyester hot-dipping as well as hot galvanizing and polyethylene hot-dipping technologies, so that a product is stable in quality, good in anticorrosion, long in service life and capable of meeting the requirements for coating uniformity and range as well as coating anticorrosion, the coating range does not exceed 40mu m, and the service life of the coating is also prolonged by more than 20% than that of a conventional product; in addition, the production process of the steel road barrier is environment-friendly and pollution-free, and the curing temperature of the coating is only 200 DEG C, while the hot galvanizing temperature is 450 DEG C, so that energy is saved, and the loss of the produced heat energy is reduced by more than 60%.

Description

technical field [0001] The invention relates to a road steel guardrail and its preparation process, which is suitable for double anti-corrosion road steel guardrails, especially for road steel guardrails with epoxy zinc-based polyester composite coatings. Specifically, the invention relates to an epoxy zinc Highway steel guardrail production line and production process based on polyester composite coating. Background technique [0002] At present, domestic and international road steel guardrails mainly include three product types: hot-dip galvanized, hot-dip galvanized + polyester coating, and hot-dip galvanized + polyethylene coated. These product types have some defects, as follows: [0003] 1. High energy consumption. The temperature of the hot-dip galvanizing process is generally around 450°C, and the production of galvanizing needs to consume a lot of heat energy. Moreover, the higher the production temperature, the lower the effective utilization rate of heat energy,...

AI Technical Summary

Problems solved by technology

[0004] 2. Not environmentally friendly

Zinc belongs to the heavy metal category. In the hot-dip galvanizing production process, a large amount of acid mist and zinc ion discharge will be generated in the pre-treatment process, and a large amount of zinc dust will be generated in the galvanizing process. Although the production enterprises have adopted environmental protection measures, there is still some acid mist 1. Zinc flows into the environment, causing environmental pollution; moreover, during the use of zinc products, zinc is continuously dissolved into the environment through the corrosion of rainwater, causing environmental pollution

[0005] 3. More labor

Most of the current hot-dip galvanizing enterprises are not highly mechanized, and most of the galvanizing is produced manually

However, the production process of hot-dip galvanized + polyethylene coating, hot-dip galvanized + polyester coating is very long, and the labor force is further increased.

[0006] 4. Unstable product quality

And these products go through multiple processes during production, further increasing the volatility of quality

[0007] 5. Waste of resources

Especially hot-dip galvanized + polyester coating, hot-dip galvanized + polyethylene coating, the traditional production process causes the film thickness difference of the coating to be very large, and the fluctuation is generally 80~120um. These redundant thicknesses have caused national resources great waste of

[0008] In recent years, the country has strengthened the control of environmental protection and energy. The traditional steel guardrail production process can no longer meet the needs of the society. It is urgent to develop a new product with energy saving, environmental protection, excellent anti-corrosion performance and less labor.

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