The importance of grinding steps for the durability of wooden doors

In the process of making and maintaining Wooden Doors, the sanding step is a key link to enhance the durability of wooden doors. Polishing not only improves the appearance of wooden doors, but also significantly enhances their service life and performance.

1. The function of grinding
1.1 Remove impurities
The first step of sanding is to remove impurities such as burrs, oil stains, glue marks and dust from the surface of the wooden door. If these impurities are not removed, they will form flaws in the subsequent coating process, affecting the adhesion and uniformity of the paint film.

1.2 Enhance flatness
The surface of the white blank of wooden doors is usually rather rough, with problems such as knife marks and scratches. Through grinding, the flatness of the white blank can be enhanced, laying a solid foundation for the subsequent coating work.

1.3 Enhance adhesion
Before spraying a new paint film, sanding the fully dry old paint film layer can expose the "fresh skin" of the coating film, increase the specific surface area at the same time, and thereby enhance the adhesion between the coatings.

2. Grinding process
2.1 Select appropriate grinding materials
The types of grinding materials include sandpaper, grinding wheels and elastic grinding materials, etc. Sandpaper includes dry sandpaper, water sandpaper, etc., and is mainly used for surface grinding. Grinding wheels are suitable for grinding irregular-shaped parts. Elastic abrasive materials such as scouring pads can be used for shaping parts and flat grinding.

2.2 Select the appropriate type of sandpaper reasonably
The fineness of sandpaper is usually indicated by the grit or mesh count. The higher the mesh count, the finer the abrasive. Different processes require the selection of different types of sandpaper. For instance, sandpaper with a grit of 180-240 is typically used for the grinding of white blanks, while sandpaper with a grit of 600-1000 is needed for the grinding of topcoats.

3. The impact of grinding on durability
3.1 Improve the quality of the paint film
Through grinding, the surface of the wooden door becomes smoother and flatter, and the paint film can adhere better to the surface of the wooden door, forming a uniform and dense protective layer. Such a paint film is not only aesthetically pleasing but also effectively prevents the erosion of wood by moisture, air and ultraviolet rays, thereby prolonging the service life of wooden doors.

3.2 Reduce wood deformation
Sanding can remove the uneven parts on the surface of wood and reduce the deformation of wood caused by uneven force. Especially for some woods that are prone to deformation, such as pine and mahogany, the sanding step is particularly important.

3.3 Enhance the corrosion resistance of wood
The surface of the wooden door after grinding becomes smoother, reducing the tiny cracks and pores on the wood surface, which are often channels for moisture and microorganisms to invade. The corrosion resistance of wood can be effectively enhanced through sanding and subsequent coating.

4. Grinding during daily maintenance
4.1 Regular inspection and grinding
In daily use, the surface of wooden doors should be inspected regularly. When scratches or paint film peeling are found, they should be sanded and repaired in time. Gently sand the damaged area with fine sandpaper and then repaint it to maintain the beauty and durability of the wooden door.

4.2 Prevent excessive grinding
Although sanding is crucial for the durability of wooden doors, excessive sanding can also cause damage to them. The depth of each sanding should be moderate to avoid excessive wear on the wood.

The grinding step plays a crucial role in the production and maintenance of wooden doors. By removing impurities, enhancing flatness and strengthening adhesion, sanding can significantly improve the durability of wooden doors. Choosing the appropriate grinding materials and sandpaper models, and carrying out the grinding process reasonably can effectively extend the service life of wooden doors, maintaining their appearance and performance. Whether it is the production of new wooden doors or the maintenance of old ones, sanding is an indispensable key step.