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I. Purpose and significance of painting:

1. Decoration: The appearance of modern products needs the same as clothing. After painting, the products have a colorful, beautiful and beautiful appearance. Increase the added value of products.

2. Maintainability: After coating, the product surface can get a layer of maintenance layer to prevent casual injury.

2. Type Identification of Painting

Type A

1. Brushing 2, Spraying 3, High Pressure Airless Spraying

4. Air spraying (manual spraying and automatic spraying) 5. Electrophoretic coating 6. Electrostatic coating

B Automatic Painting Type Differentiation

1. Manipulator painting 2, reciprocating painting 3, automatic line painting (one coat, one bake, two coat, three bake, three coat, four bake)

3. Process flow of air spraying

1. UV secondary coating: quality inspection pre-disposal electrostatic precipitation spraying primer (baking 60 15MIN) cooling (inspection) electrostatic precipitation coating UV (preheating 60 8MIN) ultraviolet photo-curing (600-800MJ/C) full inspection packaging and storage

2. Three times of UV coating: quality inspection pre-disposal electrostatic precipitation spraying primer (baking at 60 C/15MIN) cooling (inspection) electrostatic precipitation spraying mid-coat baking at 60 C/15MIN cooling (inspection) electrostatic precipitation UV (preheating at 60 C/MIN) UV curing (600-MJ/C) total inspection _Packing and Storage

3. PU secondary coating: quality inspection pre-disposal electrostatic precipitation spraying primer (baking 60 C/15MIN) cooling (inspection) electrostatic precipitation PU coating leather paint (baking 80 C/60MIN) off-line baking (baking 80 C/60MIN) full inspection packaging

Warehousing

4, PU three coatings: quality inspection pretreatment electrostatic precipitation electrostatic precipitation electrostatic precipitation electrostatic primer (baba60 C/15MIN) spraying primer (baked 60 15MIN) cooling (inspection) (baked 60 C/15MIN) baking 60 MIN) electrostatic precipitation electrostatic precipitation PU \\\\\\\\\\\\94; Full Inspection Packaging and Storage

Note: The inspection process of red characters is not necessary if continuous production is carried out on the production line. The preheating process of blue characters is different if Korean UV is used.

IV. Curing mechanism of coatings

1. Drying type:

A accelerated drying B baking drying C natural drying D mapping curing

2. Drying method:

A convection B radiation C convection, radiation mixed D ultraviolet curing (300-450 NM)

V. Varieties of Paints

Identify by attributes:

A. Single liquid type B. Double liquid type (PU) C. Multiple liquid type (PU) D. Single E. Powder type

Functional discrimination:

A. Plastic paint (hard glue paint, soft glue paint) B. Wood paint C. Metal paint D. Architectural paint
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