Coating and spraying equipment production line
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First of all, the so-called coating production line is actually a manufacturing process that includes a series of operation steps, which are all realized by coating equipment.
The specific operation process of the coating production line is as follows: it is the product input link, and the task of this link is to place the items that need to be coated on the working plug-in of the coating equipment, which marks the beginning of the coating work. The next step is the electrostatic precipitator link, the coating object will produce some oil and dust during the production process, this link is to remove these impurities and ensure the coating effect. Then there is the preheating link, which is mainly to preheat the painted items, so that the items are more uniform when colored, so as to achieve better coating results.
Then there is the primer spraying session, where the purpose of this step is to cover the color of the plastic itself and first spray the base color required for production. This is followed by drying, where the paint is heated to a semi-dry state in the infrared zone in the tunnel in preparation for subsequent painting. This is followed by the surface spraying session, where the spraying staff will spray the desired color as required. The sliding and drying process is mainly to allow the paint to dry during the sliding process through the tunnel.
This is followed by UV spray curing, in which workers use 365 nanometers (UV365nm) of light from ultraviolet light, combined with the color requirements of the paint (800-1200 mJ), for an instantaneous cure. Depending on the type and needs of the coating, the time and manner of curing may vary. The last step is to ship and inspect the packaging, and the completion of this step means that the production process of a product has ended, and the next step is ready for packaging and shipment.
The process flow of the coating production line is mainly divided into three parts: pretreatment, powder coating, and heating curing.
The pretreatment stage of the coating line is mainly to clean and treat the surface of the product in preparation for subsequent spraying.
The coating equipment mainly includes pretreatment equipment and coating equipment, in which the pretreatment equipment includes manual simple process and automatic pretreatment process. The automatic pretreatment process can be further subdivided into automatic spraying and automatic immersion spraying. Before the painting process begins, the surface of the workpiece must be treated to remove oil and rust in order to ensure that the paint adheres better to the surface of the workpiece. The pretreatment process will involve the use of a variety of chemicals, mainly including rust removers, degreasers, surface conditioners, phosphating agents, etc.
In the pretreatment section or workshop of the coating production line, the first thing that needs to be paid attention to is to formulate a set of strict procurement, transportation, storage and use guidelines for strong acids and alkalis. These guidelines require workers to be provided with the necessary protective clothing and safe and reliable clothing, as well as reliable equipment and handling tools, as well as clear emergency response and rescue measures. Secondly, in the pretreatment section of the coating production line, because a lot of waste gas, waste liquid, etc. will be generated, so environmental protection measures are also very important, and the company must install an exhaust system, waste liquid treatment equipment and other waste treatment devices.
Due to the difference in the production line process and the pre-treatment liquid of the coating equipment, the quality of the pre-treated workpiece will also vary. For those parts that have been thoroughly treated, the surface of the surface will be completely cleaned of oil and rust. In order to avoid recurrence of rust in a short period of time, in addition to cleaning oil and rust, it is also ensured that phosphating or passivation is carried out at all stages of pretreatment. The phosphorus parts are then dried to remove surface moisture before dust removal. Small batches are usually produced in a single piece, either by natural air-drying, air-drying or air-drying. For large-scale line operations, low-temperature drying is usually used, and drying is carried out in an oven or drying tunnel.
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