Manufacturing method for traceable high-corrosion-resistance three-piece aerosol can

Abstract

The invention relates to a manufacturing method for a traceable high-corrosion-resistance three-piece aerosol can. The manufacturing method is characterized by sequentially including the steps that welding is performed; synchronous supplementary coating of internal and external powder is performed; solidifying is performed through infrared rays; heating solidifying and invisible code spraying are performed; three small aerosol can flat-sheet pieces are welded and combined through resistors; the same kind of thermoplastic polyester resin powder coating is sprayed on internal and external side regions of a weld seam; after electrostatic adsorption is utilized for solidification, an internal weld seam supplementary coating strip and an external weld seam supplementary coating strip are formed; the powder coating is pre-solidified through an infrared ray solidifying device so that pre-filming can be achieved on the surface of the powder coating; then a heating solidifying device is utilized for completely solidifying the powder supplementary coating strips; finally, invisible ink is adopted for spraying invisible codes on the external powder supplementary coating strip and solidifying the invisible codes at normal temperature. The product is good in corrosion resistance and traceable, anti-fake performance is easy to achieve, and the method is suitable for industrialized production.

Description

technical field [0001] The invention relates to a traceable method for manufacturing a three-piece aerosol can with high corrosion resistance, which belongs to the field of metal packaging. Background technique [0002] The corrosion of aerosol cans has always been a technical problem in the industry, which has plagued the applicability and development of industry products for many years, and the corrosion of aerosols mainly occurs in the inner and outer weld areas. At present, in order to protect the weld seam from corrosion and rust caused by the content and the external environment, aerosol cans usually use internal and external recoating liquid devices after the welding process to apply liquid paint on the weld by rolling or spraying. Seam area, and then baked and cured at high temperature to form a paint protective layer. [0003] In recent years, with the emphasis on environmental protection requirements, it has become a trend to use dimethyl ether propellant and wate...

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Problems solved by technology

[0003] In recent years, with the emphasis on environmental protection requirements, it has become a trend to use dimethyl ether propellant and water-based products for three-piece aerosol cans, and the requirements for corrosion resistance of products are getting higher and higher; daily chemical care products are increasing year by year. In the extremely humid environment of the toilet, corrosion and rust are more likely to occur; in recent years, the air conditioner cleaning agent and car care products that have continuously increased in recent years are extremely corrosive, and occasionally pitting corrosion or large-scale corrosion in the weld repair area Corrosion and leakage problems, and ordinary liquid internal and external repainting cannot meet the above product application requirements

[0004] In addition, in the three-piece aerosol can industry, in order to prevent various dealers from colluding goods, market counterfeiting and product traceability, the bottom of the aerosol can is generally treated with a coding process, but usually when there are corrosion and rust problems in the market, it cannot be traced back to Detailed production information for cause finding and problem analysis

[0005] The patent number is 201320633611.0, and the Chinese patent titled "simultaneous re-coating device inside and outside the can-making weld seam" discloses a device for simultaneously performing powder re-coating on the inside and outside of the can-making weld seam, but does not involve specific re-coating. Coating process, and the equipment belongs to the inherent characteristics of general powder equipment, such as powder nozzles, powder baffles, powder supply boxes and recovery boxes, etc., there is no process solution such as how to prevent unstable conveying and loose powder when internal and external powder is recoated at the same time, and this is also The core technical difficulties in the construction of this powder recoating technology, and there is no product traceability solution

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