Wood door industry paint coating process pros and cons PK ultimate Raiders

Jiuzheng Building Materials Network Guide: In all the manufacturing processes of wooden doors, paint decoration is the last, and most important, time-consuming process. The quality and efficiency of this process directly affects the appearance quality and production efficiency of wooden doors. And restrict the market competitiveness of enterprises. The wooden door painting process has become a bottleneck in the wooden door manufacturing process. Only by solving this problem can we achieve high-efficiency production.

Hand painted paint - highlighting many shortcomings

We all know that traditional hand-painting has many shortcomings, such as: due to different personal operation methods, it is difficult to control the quality stability and uniformity of batch products; production efficiency is low, can not meet the needs of mass production; Increase the production cost of the enterprise; manual operation has great harm to the operators themselves. The simple manual painting booth does not carry out environmental treatment of paint mist, which is harmful to the environment; it requires a large number of operators, and now masters the painting technology. Workers are hard to find and increase the production and management costs of the company.

The wooden door is coated with many different processes. The principle of the process design is to select the appropriate coating type according to the requirements and standards of the customer's wooden door products, determine the painting operation process and the configuration of related equipment.

From the surface effect requirements of wooden door products, we can divide them into fully enclosed effects, semi-open effects (including full open effects); at the same time, they can be divided into transparent effects and solid colors.

In the market, we can see most of the wooden door products, the surface coating effect is fully enclosed transparent and colored effect, the coatings used are mainly PU paint. In this paper, we will introduce the process and the advantages and disadvantages of each process with PU as the coating's fully enclosed transparent colored effect.

According to the product positioning and materials used by the respective companies, each factory has made some adjustments based on the above process, and has derived many different process operations. In this article, we will focus on introducing various derivative process operations. Process.

One: one bottom side

1. Process: white blank grinding → scraping water ash → grinding → spray transparent primer → sanding → spraying colored transparent surface.

2, product positioning: low-end products.

3. Advantages: The process is the simplest, and the coating cost is the lowest. In the case that the wood white billet has obvious defects, it is filled with wood-colored water ash, and the colored transparent surface is sprayed with a relatively dark color, which can better cover the substrate. defect. Uniform color.

4. Disadvantages: The product has no permeability and can not see the natural texture of the wood. The overall coating effect is similar to the solid color paint effect on the medium density board. Because only one primer is made, the filling property of the product is not good, and the anti-sag property is not good. It is easy to appear that the surface paint film of the product has wave-like fluctuations, which greatly affects the overall beauty of the product. The grinding of water ash is the most time-consuming, labor-intensive, dusty and dusty, making it difficult for the sander to work.

Two: two bottom side (including water gray type)

1. Process: white blank grinding → scraping water ash → grinding → spray transparent primer → grinding → spray transparent primer → sanding → spray colored transparent surface.

2, product positioning: low-end.

3. Advantages: The process is relatively simple, the coating cost is low, and it has better filling and anti-sag property than the previous process.

4. Disadvantages: The permeability of the product is not so good, the layering is not strong, and the natural texture and beauty of the wood cannot be well displayed. The water ash has a large grinding strength and a large dust ash.

5. Suggestions: (1) Change the wood color water ash to “colored water ash”; (2) Change the spray colored transparent top lacquer to use the color repairing essential oil to repair the color, lightly grind, and then spray the transparent top lacquer.

Third: three bottom side

1. Process: white blank polishing→spray transparent primer→grinding→spray transparent primer→grinding→spray transparent primer→grinding→repairing→light grinding→spraying topcoat.

2, product positioning: high-end products.

3, advantages: good permeability, can clearly show the natural texture of wood. The construction of the water ash is omitted, and the strength of the grinding is reduced.

4, shortcomings: high cost, the process has not been simplified, if it is the material of deep wood eye, three primers can not do a good fullness. If the texture of the material is fine, it will not enhance the effect of the grain texture (just the real performance).

5. Suggestions: (1) If the material is darker, the second primer can be wet-wet; (2) the second primer can be changed from spray to scrape, which not only greatly saves Cost, the coating effect is better.

Fourth: bottom coloring, face repair

1. Process flow: white blank grinding → spray sealing solid bottom → grinding → rub PU Gres → spray transparent primer → sanding → spray transparent primer → sanding → spray transparent primer → grinding → color correction → light grinding → spray Clear topcoat.

2, product positioning: high-end products.

3. Advantages: It has very good permeability and layering (three-dimensionality). Even if the texture of the wood itself is not clear enough, the texture can be expressed more clearly through the above process.

4. Disadvantages: high cost and long working time.

5. Suggestions: (1) If the texture of the wood itself is very clear and beautiful, it is not necessary to use the bottom coloring (such as the veneer of Sapele, directly to make a transparent primer, the wooden eye itself will emit a flashing effect. Very beautiful; but if you do the bottom coloring process, you can't show this effect); (2) After the bottom coloring process, the color of the face color can be lighter, so that the layering and permeability are better.

Through the above process introduction and analysis, we can see that each process has its applicability and has its advantages and disadvantages. Therefore, when choosing a process, we must consider the actual needs and conditions to choose the right process. Otherwise, it is difficult to achieve the desired effect, sometimes it costs more, and we can't do the effect and quality we want. .

In summary, only the automated coating method can be used for high-volume, high-quality, stable production to meet the high-efficiency production requirements of enterprises.

Automated spraying - trends

The automation of furniture paint coating is the inevitable result of the development of large-scale production, and also a trend in the development of furniture coating industry! Many companies are well aware of this reason, which equipment is the most suitable, most cost-effective and saves paint. Some companies have begun to try. Some strong domestic enterprises have purchased imported automatic painting equipment. However, we have also heard many examples of operational failures, and only a small number of companies have barely used it by changing the process. Is it really impossible to automate the painting of wooden doors?

In all the manufacturing processes of wooden doors, paint decoration is the last, and most important, time-consuming process. The quality and speed of this process directly affects the appearance quality and production efficiency of wooden doors, and restricts the market competition of enterprises. force. The wooden door painting process has become a bottleneck in the wooden door manufacturing process. Only by solving this problem can we achieve high-efficiency production.