In the modern manufacturing industry, the
painting production line of spraying paint is one of the important parts of
product surface treatment, and pre -processing, as the primary step of the
entire painting process, directly affects the adhesion, uniformity and product
quality of the coating. This article will introduce the pre -processing process
in the painting production line of spray paint, including its definition,
working principles, main methods, and applications in the manufacturing
industry.
Pre -processing means that before the
product is painted, the surface of the product is processed through a series of
chemical, physical or mechanical methods to ensure that the coating can better
attach to the product surface and improve the painting effect. The main goals
of pre -processing include removing surface pollutants, improving coating
adhesion, increasing surface energy, and improving the corrosion resistance of
products.
The pre -processing working principle
mainly includes the following aspects:
• Remove pollutants: Products may be affected by various pollutants
during manufacturing and transportation, such as oil, dust, metal particles,
etc. Pre -processing, sandblasting, and sandblasting, effectively remove the
surface pollutants, and provide clean working surfaces for subsequent paint.
• Improve surface energy: Pre -processing can change the chemical
properties of the product surface and increase its surface energy. This helps
the coating more attached to the surface of the product, forming a uniform and
firm coating.
• Promote the attachment of coating: Pre -processing By forming a
proper treatment layer on the surface, it will increase the affinity between
coatings and substrates, increase the adhesion of the coating, and prevent
peeling and falling off.
• Increase corrosion resistance: Pre -treatment can improve the
product's corrosion resistance by forming the surface layer of corrosion. This
is particularly important for products used in harsh environments, such as cars
and aircraft.
In the painting production line of paint,
the commonly used pre -processing methods include:
• Chemical cleaning: Use chemical solvents or alkaline solutions to
clean the surface of the product to remove pollutants and other pollutants.
• Sand spray/spraying: Use sand particles or steel pills in high
-speed jet streams to impact the surface of the product to remove oxide layers,
oils and other pollutants, while forming a rough surface and increasing coating
adhesion.
• Pickle: Use acidic solutions to treat the metal surface, remove
oxidation layers, rust and other bad substances, while increasing the affinity
of the surface.
• Phosphorusization treatment: The product surface reacts with
phosphate to form phosphate film, which improves coating adhesion and corrosion
resistance.
• Electrolytic processing: Use the principle of electrolytic to
generate a layer of oxide on the metal surface to improve the appendability and
corrosion resistance of the surface.
Preparatory processing is widely used in
various manufacturing fields. For products that require high -quality coating,
pre -processing is an indispensable link. The following is the application of
pre -processing in some key industries:
• Car manufacturing: Pre -treatment on the surface of the car is
essential for spraying and corrosion. Pre -processing ensures the cleaning and
durability of the surface of the car shell, and improves the adhesion and
quality of the coating.
• Electronic product manufacturing: The surface of electronic
products requires corrosion corrosion and improved coating adhesion.
Preparatory processing plays a key role in ensuring the appearance and
performance of the electronic product.
• Aerospace Industry: The surface treatment of aircraft and
spacecraft needs to consider many factors such as weight, corrosion resistance
and appearance, and pre -processing is an important step to ensure the quality
of paint.
• Furniture manufacturing: Pre -treatment on the surface of the
furniture can improve the adhesion and durability of the coating, and ensure that
the appearance of the furniture is long -lasting during use.
With the continuous advancement of
technology, pre -processing technology is constantly innovating. Some emerging
pre -processing technologies include:
• Plasma Jet: Use plasma spraying and cleaning surfaces, which can
efficiently remove oil and pollutants, while improving surface energy.
• Nano -technology: The use of nano -material on the surface is used
to form a protective film to improve the surface corrosion resistance and anti
-pollution resistance.
• Water -based coating technology: Use water -based coatings to
replace traditional organic solvents coating, reduce environmental pollution,
and improve the environmental protection of paint.
Pre -processing, as a key link in the
lacquer coating production line, directly affects the quality and performance
of the product coating. Through reasonable selection and application of
different pre -processing methods, manufacturing can improve the coating effect
of products, extend product life, while meeting the requirements of product
appearance, durability and environmental protection. In the future, with the
introduction and continuous development of new technologies, pre -processing
technology will continue to develop, providing a more efficient and
environmentally friendly surface treatment plan for the manufacturing industry.
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