Introduction of Furniture Painting Technology, Materials and Steps

Generally speaking, ordinary wooden boards are made of some wood fibers or synthetic wood. Although they are relatively reliable in environmental protection performance and will not suffer excessive loss due to temperature changes, the aesthetics of the products are slightly inferior. If the surface is not coated or protected, it will be easily corroded in the later stage. Today, I will introduce one of the key wood processing technologies, that is, wood painting technology.

1. What is used for painting furniture?

1, covering paint In the past, the paint commonly used in homemade furniture completely covered the furniture material, and only the paint color could be seen. Commonly used are red, big green and so on. It has been eliminated.

2. In the production of raw lacquer mahogany furniture, this kind of paint is often used and sprayed on the surface of furniture to reflect the color of furniture itself.

3.PU paint (polyester paint) is often used to make high-grade furniture such as classical and post-modern. This paint has high permeability and can fully reflect the wood grain texture. Because the wooden conduit is completely filled, it achieves a smooth effect, which is often called sealing paint. This kind of paint has high cost, complicated operation, long process and difficult rework, but the paint is easy to clean and water can't enter the furniture through the paint film at all. Strong resistance to all kinds of corrosive substances.

4. After the construction of 4.PE coating, this coating can get a thick paint film with excellent fullness and luster, high transparency and good leveling. The original paint is light in color and easy to spray. The coating has ultra-high hardness and is often used in piano and other products. However, the adhesion is not good and it is easy to fall off.

5.NC paint (nitrocellulose paint), commonly known as nitrocellulose paint, is especially suitable for antique effect, so it is often used in the production of American and British furniture. NC paint often has an open effect, and the catheter on the wood surface is exposed, pursuing a natural effect. NC paint has the characteristics of fast drying time, short working procedure and easy rework. Tianna water, alcohol, etc. It is easy to damage the surface of this paint. The surface scratches easily. Not resistant to high temperature, not allowed to burn.

Second, the painting process of solid wood furniture

1. Main construction technologies

( 1)? Construction technology of varnish:

Polishing the base (cleaning the wood surface → polishing with sandpaper, smoothing and polishing, and cleaning with wet cloth); Brush the varnish for the first time (with thinner, the paint film dries quickly); Blow putty for the first time and polish it with sandpaper (putty repairs nail holes and gaps); Brush the varnish for the second time and polish it with fine sandpaper; Brush the varnish for the third time and polish it; Wooden at least 5 times, polished with water sandpaper, waxed and polished. Attention:? Interval until dry. 6 hours in summer and 24 hours in winter. Keep the site clean and free of dust. The temperature is above 5 degrees Celsius.

(2)? Construction technology of mixed color paint: grinding the base (cleaning the dust on the surface of the base, repairing the base, leveling with frosted paper); Scrape putty for the first time (putty, varnish, gypsum and powder water are mixed at 3:6: 1) → polish → brush primer (main paint: curing agent: diluent 1:0.5: 1, the thickness of primer is about 1 cm, and it is dried for 4 hours) → Diluent increases dryness, too thick for construction, too thin for adhesion) → Fill putty for repair → Grind and wipe for the third time, brush the top coat for the second time → Grind → Trim for the third time → Grind and wax.

2. Key points of construction

Code for construction of oil cleaning and paint polishing Primer is an important process of painting. First of all, remove the dust, oil stains and other impurities on the wood surface. Lubricating oil powder is also an important process of varnish painting. During construction, cotton silk is dipped in oil powder and coated on the wood surface, rubbed back and forth by hand, and the oil powder is rubbed into the wood eye. When brushing clean oil, you should hold the oil brush easily and naturally, and use your fingers gently, so as not to loosen or drop the brush when moving. When painting, it should be carried out according to the requirements of dipping more times, dipping less oil every time, diligent operation and smooth brushing, and the construction should be carried out according to the operation methods of first up and then down, first difficult and then easy, first left and then right, first inside and then outside, and horizontal and vertical brushing.

Code for Construction of Mixed Oil on Wood Surface When dealing with the grass-roots level, in addition to cleaning up the sundries at the grass-roots level, local putty should be added and polished along the grain with sandpaper. Before painting the top coat, seal the knots and wood resin with lacquer flake (shellac paint). Drying oil or berth clearing should be applied at the grass-roots level, and drying oil layer should be evenly applied to all parts, without brush leakage. After the priming oil is completely dried, scrape the putty for the first time, polish it with manual sandpaper after drying, and then fill in the high-strength putty. Putty shall be based on not picking silk. When painting the top coat, it should be polished with fine sandpaper first.

3.？ Matters needing attention

( 1)? Basic treatment should be carried out as required to ensure that the surface coating will not fail.

(2)? Clean up the surrounding environment to prevent dust from flying.

(3)? Because the paint is toxic and has a strong stimulating effect on the respiratory tract, we must pay attention to ventilation during construction.

Latex is the main coating for plastering surface of indoor panels.

Basic treatment of board surface and plastering surface: firstly, remove impurities such as dust and pimples on plastering surface with a shovel, and then clean up the dust and dirt on the surface with a brown brush. After the surface is cleaned, level it with putty. After the putty is dry, first scrape off the excess putty with a shovel, and then polish it with 1 sandpaper. Flat-fell seam of board face is generally bonded with slit tape. Brush the nail tail with antirust paint and smooth it with gypsum putty. Fill the internal corners with putty, and paste the coating on the seam panel and plastering surface: cleaning → filling the gaps, locally scraping putty → smoothing → first scraping putty → smoothing → second scraping putty → smoothing → third scraping putty → priming → first painting → filling putty → smoothing → second painting → third painting.

Complete putty scraping and polishing:

When filling the large gaps in the interior painting surface, scrape the latex putty with batch embedding tools, scrape all the tiny sand holes and shrinkage cracks, make them dense, flat and tidy, and lay them horizontally at the same time.

Cross-scrape the wall, scrape as thin as possible, without leakage, and leave no gaps at the joints. Be careful not to dirty doors, windows and other surfaces. Scrape putty three times in turn. After the putty is completely dried, wrap it on a flat sand rack with 1 sandpaper, and polish the putty residue and uneven place. Pay attention to the uniform force and protect the edges and corners. After grinding, clean the ingredients with a brown broom.

The first coating:

Before the first brushing, the base surface must be cleaned and the floating ash must be wiped off. When painting, roller coating should be used. Generally, the order of painting is from top to bottom, from left to right, first horizontal and then vertical, then edges and corners and facets, and then big facets. There shall be no residual paint in the internal corner, and there shall be no edges and corners in the external corner. If the wall can't be painted from top to bottom at the same time, it is necessary to operate at multiple levels from top to bottom and cooperate with each other to avoid overlapping after painting. Apply the same batch of paint to the independent surface every time, and finish it at one time.

Repair putty: after each coating is thoroughly dried, it should generally be inspected. If there is any defect, it should be repaired locally and scraped off with a claw to avoid damaging the paint film.

Polishing: After the repaired putty is completely dried, polish the coating surface with fine sandpaper, with light and even force, so as not to break the paint film. After grinding, the surface should be cleaned.

The second brushing method is the same as the first one.

Although a lot of furniture is mainly made of wooden boards, we may find that it is easy to be corroded in the later period and the aesthetics is not so reliable, so many manufacturers are more and more inclined to treat the surface of wooden boards. What is common is Bian Xiao's explanation about the process of woodcut painting. It can be seen that spraying a certain coating on the surface of the board can play a role in protection and decoration.

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