CN101306416A - Bamboo surface electrostatic painting method - Google Patents

Abstract

The invention relates to a bamboo-wood static spraying method. Conventional merchant PU paint for the automobile static plastic spraying is adopted, and the spraying is performed according to the following steps which are correspondingly improved: bamboo-wood is dried till the water ratio is 8 to 10 percent; the water ratio of the manufactured workpiece is controlled within 8 to 10 percent; sanding, dedusting, hanging and primary priming paint spraying are performed to the workpiece, and then the work piece is dried; secondary sanding, dedusting, hanging and intermediate paint spraying are performed to the work piece, and then the work piece is dried; tertiary sanding, dedusting, hanging and final paint spraying are performed to the work piece, and then the work piece is dried. The original metal surface static plastic spraying technology is shifted into the bamboo-wood surface spraying, the smoothness, the fineness, the plumpness and the adhesive force of the sprayed surface of the bamboo wood are observably enhanced, and the method effectively supports the high quality of the bamboo wood product. A hydraulic pressure spray gun is adopted for spraying, paint gas spray can not occur, the losing of the paint caused by spraying is reduced, the discharge capacity is reduced, and the method is paint saving and environment-friendly.

Description

Bamboo surface electrostatic painting method

[technical field]

The present invention relates to a kind of spraying method, especially carry out the method for electrostatic spraying at bamboo matter, wood materials and article surface.

[background technology]

Carry out the method for electrostatic plastic spraying in the metal surface, extensive use in the manufacturing repairing trades of automobile making and repairing trades, motorcycle, refrigerator manufacturing industry.For a long time, the bamboo and wood products surface is that the air pressure of certain pressure turns to aerosol with lacquer and sprays in bamboo and wood products and its surrounding environment with nitrate paint and common air pressure spray gun spraying, and the waste of lacquer liquid is big, and environmental pollution is serious.The different spraying methods of unlike material, cause the very big difference of lacquer painting impression: the surface smoothness of metal plastic-blasting, plumpness, fineness, adhesive force outclass the surface of bamboo wood spray nitrate paint.The method that exploration is used for reference the metal plastic-blasting on high-grade bamboo and wood products surface is carried out electrostatic spraying, to improve its surperficial flatness, fineness, plumpness, adhesive force, nothing is suspected to have its important practical sense, yet, do not see that so far related data report and this type of material object appear on the market.

[summary of the invention]

Adopt Electrostatic Spray Technology at still unresolved bamboo and timber material of prior art and product surface, problem with further raising facing decorate properties, the technical problem to be solved in the present invention be overcome these nonmetallic materials of bamboo wood non-conductive, moisture content is too high or too low, a series of factors of painting of being unfavorable for such as surface smoothness difference, designs the brand-new bamboo surface electrostatic painting method of a cover.

The technical scheme that addresses the above problem is: the lacquer of selecting for use is the PU lacquer that curing agent, paint, diluent in 0.5: 1: 1 ratio collocation packing that metal surface such as automobile electrostatic plastic spraying are used become case to sell together, this lacquer is packed as priming paint, intermediate layer paint, finish paint again, and the step of spraying with relevant improvement is:

(1) the bamboo drying of wood: moisture content is 8～10%;

(2) the bamboo wood workpiece is made: the moisture content of the openpore workpiece of making controls to 8～10%;

(3), hang on the static frame of spray booth with sanding, the dust removal of openpore workpiece;

(4) commercially available PU lacquer is made into priming paint, intermediate layer paint, three kinds of mixed paint of finish paint by the commodity prompting, is sub-packed in three hydraulic pressure buckets;

(5) use the hydraulic pressure spray gun to openpore workpiece primer spray, advance drying room and dry by the fire 0.5h under 40 ℃ of-50 ℃ of temperature conditions, helping the survey method is that hand is touched the sticking feel of nothing, carries out sanding, dust removal again;

(6) hang on the static frame for the second time, the spray intermediate layer paint is advanced drying room for the second time, dries by the fire 0.5h in 30 ℃-40 ℃, carries out sanding for the third time, dust removal;

(7) hang over for the third time on the static frame, spray plane layer lacquer advances drying room for the third time, at 30 ℃-40 ℃ baking 0.5h.

The invention has the beneficial effects as follows: the metal plastic-blasting technique is married again in the nonmetallic bamboo timber product, improved planarization, fineness, plumpness and the adhesive force of lacquer painting significantly, give bamboo and wood products superior with strong support.Adopt hydraulic spraying, the atomizing ease of paint is lost and is subtracted greatly, saves paint, has reduced blowdown flow rate.

[specific embodiment]

The present invention is described in further detail below in conjunction with embodiment: the electrostatic plastic spraying technology of marrying again metal is to nonmetallic bamboo wood, need do following three improvement: the one, change non-conductive for possessing certain electric conductivity, the 2nd, the reasonable control of moisture content, the 3rd, adopt the hydraulic pressure spray gun.Dry bamboo timber is insulator, the bamboo timber of high-moisture percentage is electric conductor, but moisture content is too high unfavorable to paint quality and fungus-proof antisepsis, has only moisture content to be controlled at (damping that should remake of super scope is handled) in 8%～10% scope, is only the reasonable plan that both take into account.Traditionally, bamboo wood spray nitrate paint all adopts the air pressure spray gun with the metal plastic-blasting, forms and coats with lacquer aerosol, is sprayed in object surface and its surrounding environment, takes lacquer, blowdown is serious.The imbibition ability of bamboo wood is strong more than metal, therefore selects for use the effect of hydraulic pressure spray gun to be better than the air pressure spray gun, and during spray can not trickle in the surface, do not produce the lacquer aerosol, and province coats with lacquer, blowdown is light.The present invention is controlled at 8%～10% with the whole moisture content of the bamboo drying of wood.The workpiece of making is drawn up mouth, and making land used is ground such as Europe, North America, and local equilibrium moisture content mostly is 8%～10% greatly, if make the equilibrium moisture content of land used be higher or lower than this scope, then the dry first whole moisture content of bamboo timber is done corresponding change.It should be noted that the bamboo wood in the application's material, the finished product that general reference bamboo matter or wooden material, workpiece, each workpiece are assembled is referred to as goods to workpiece and finished product, and therefore, bamboo wood is general term with goods.Best mode is to spray after making workpiece, and each workpiece is assembled into finished product, and then finished product is painted everywhere and evenly do not blanked.

Claims (1)

1, a kind of bamboo surface electrostatic painting method, the PU lacquer of selecting for use the commercial metals surface plastic spraying to use is characterized in that the step that sprays is as follows with relevant improvement:

(1) the bamboo drying of wood; Moisture content is 8～10%;

(2) making of bamboo wood workpiece: the moisture content of the openpore workpiece of making is controlled at 8%～10%;

(3), hang on the static frame of spray booth with the sanding of openpore workpiece, dust removal;

(4) commercially available PU lacquer is made into priming paint, intermediate layer paint, three kinds of mixed paint of finish paint by the commodity prompting, is sub-packed in three hydraulic pressure buckets;

(5) use the hydraulic pressure spray gun to openpore workpiece primer spray, advance drying room and dry by the fire 0.5h under 40 ℃ of-50 ℃ of temperature conditions, helping the survey method is that hand is touched the sticking feel of nothing, carries out sanding, dust removal again;

(6) hang on the static frame for the second time, the spray intermediate layer paint is advanced drying room for the second time, dries by the fire 0.5h in 30 ℃-40 ℃, carries out sanding for the third time, dust removal;

(7) hang over for the third time on the static frame, spray plane layer lacquer advances drying room for the third time, at 30 ℃-40 ℃ baking 0.5h.