What are the precautions for spraying powder electrostatic spraying assembly line equipment?

powder coating equipment

The process flow of electrostatic spray line equipment is divided into: spray pretreatment, dehydration and drying, powder spray coating, high temperature heating and curing. In the early stage, there are manual simple spraying process and automatic spraying pretreatment process. Later, after development, it is divided into automatic spraying pretreatment and automatic immersion spraying pretreatment.

The sprayed workpiece must be surface treated to remove oil and rust before powder spraying. At this stage, the pretreatment uses more chemical solutions, mainly including rust remover, oil remover, surface adjustment agent, phosphating agent and so on. In the pre-treatment section of the electrostatic spray line equipment, great attention should be paid to the necessary strong acid and strong alkali purchase, transportation, storage and use systems, to provide workers with the necessary protective clothing, safe and reliable clothing, handling, and equipment, and to formulate in case of accidents Emergency measures and rescue methods in time.

The production of small batches of workpieces generally adopts natural drying, sun drying, and air drying. For mass production of workpieces, low-temperature drying is generally adopted, using an oven or a drying tunnel. Generally, manual powder spraying devices are used for the production of small batches of workpieces, and manual or automatic powder spraying devices can be used for the production of large batches of workpieces. However, whether manual or automatic powder spraying is used, the spraying quality is the most important. When spraying, it is necessary to ensure that the sprayed workpiece is sprayed evenly and sprayed with a consistent thickness to prevent thin spray, missed spray, rub off and other defects.

In the process of powder spraying of electrostatic spraying assembly line equipment, pay attention to the hook part of the workpiece. Before entering the high temperature curing furnace, the powder attached to it should be blown off as much as possible to prevent the excess powder on the hook from solidifying.

Matters needing attention in the process of high temperature curing are: sprayed workpieces, if it is a small batch of single-piece production, before entering the high temperature curing furnace, pay attention to prevent the powder from hitting the workpiece. If the workpiece is powdered, it should be Respray powder in time. The baking should be controlled strictly according to the temperature and time of the process to prevent the color difference that should be controlled improperly, and insufficient curing caused by over-baking or too short time.

For workpieces that are automatically conveyed in large quantities, before entering the high-temperature drying tunnel, check whether there is any leakage, thinning or partial dusting. If these problems or unqualified workpieces are found, they should be filled in time or removed and re-sprayed. . If some workpieces are sprayed too thinly, they can be taken out of the curing oven for powder spraying and curing again. In fact, painting refers to covering the metal or non-metal surface with a protective or decorative layer.

Electrostatic spraying assembly line equipment has experienced the development process from manual spraying to semi-automatic spraying production line and then to fully automatic spraying production line. The degree of automation is getting higher and higher. Therefore, the application of electrostatic spraying assembly line equipment is becoming more and more extensive and deep Many areas of the national economy.