Knowledge of small science, why do solid wood furniture need to leave expansion joints?

Nowadays, many people like to put solid wood furniture in their homes, which is due to the fact that the texture of this furniture is particularly good-looking, and it will look special at home, but solid wood furniture will leave a telescopic space on the top when it is installed.

This is because wood has a certain elasticity, it will contain some moisture, the moisture in it will change with the seasons or the change of the environment, so that the wood may also produce a certain degree of deformation, so in order to prevent the furniture from being deformed when using and affecting the appearance, it will go when it is made, and leave a certain space in the structure of the furniture. <>

If there is no expansion space on the furniture, the furniture may be raised by the change of dryness or humidity in the atmosphere, which will cause cracks in the furniture, which will not only affect people's use, but also affect the aesthetics of the furniture. <>

Therefore, when making furniture, there will be some space in it, but this expansion space will not change from the appearance of the furniture. However, some people will not leave gaps when making it, which is mainly to let the wood go through high temperature treatment, and then go through some chemical solvent treatment and other procedures, so that the furniture does not need to leave a stretch space. <>

However, this treatment is used in mahogany furniture that loses its original luminosity. Therefore, when buying furniture, it is best to buy a telescopic space, and when designing these telescopic spaces, they will change with the change of humidity in the atmosphere, so that they can also meet the needs of people in different regions. However, leaving these spaces can be a hiding place for stains, which will make cleaning a lot more difficult.

In the production process, some errors will lead to some errors in the expansion space, which will affect the overall quality of the home. And now the error of leaving space for furniture has become an excuse for some businesses, which is not conducive to the quality of furniture can be further improved.

The principle of thermal expansion and cold contraction, I am afraid that the solid wood will expand and be easy to deform when the temperature rises, so it is necessary to leave expansion joints.

The expansion joint is to prevent the frame or corner tenon of the furniture from being cracked when the wood shrinks or expands due to the external environment, resulting in the loosening of the parts of the furniture and the inability to use normally. It is necessary to treat the expansion joints on the surface of the solid wood panel. Most of them are at the interface, and they are two different wood grain directions.

Because most of the solid wood furniture is a mortise and tenon structure, the wood will have changes in thermal expansion and cold contraction, and expansion joints will be left to prevent the deformation of the furniture.

If we take a closer look at some high-end solid wood furniture, especially mahogany furniture, we will find that the side of the furniture panel tends to have a gap that is neither wide nor narrow. This type of gap is called an expansion joint or shrink joint and is not caused by a mistake in the design and manufacture of the furniture. On the contrary, expansion joints are deliberately ingenious "ideas".

1. What is an expansion joint?

Expansion joints are the traditional processing technology of classical Chinese furniture. Anyone who knows about classical furniture knows that a piece of pure classical furniture will inevitably retain the excellent craftsmanship of traditional furniture - the tenon and tenon structure, without nails, through the clever combination of tenon and tenon to assemble the parts.

2. Why does solid wood furniture have expansion joints?

1. Expansion joints should be left for solid wood furniture to inhibit the "thermal expansion and cold contraction" of wood and prolong its service life.

2. The expansion joint is to prevent the frame or corner tenon of the furniture from cracking when the wood shrinks or expands under the external environment, resulting in the loosening of all parts of the furniture and the inability to use normally.

3. In order to reduce the deformation of wood, there is a strict drying process before the wood is made into furniture, and some may need to be baked for more than a month. In order to control the quality of standardized manufacturers, the moisture content of products sold in different regions is also different. Even so, in order to prevent the furniture from deforming, it is important to reserve expansion joints.

Third, the role of expansion joints.

1. There is a strict drying process for wood before it is made into furniture, and some may need to be baked for more than a month to reduce deformation. In order to control the quality of standardized manufacturers, the moisture content of products sold in different regions is also different. Even so, in order to prevent the furniture from deforming, it is important to reserve expansion joints.

2. The longitudinal shrinkage of wood is not large, and expansion joints are generally not needed at both ends. Some manufacturers have seams all around, so they look better. There are also some manufacturers who do not leave expansion joints for furniture, but not leaving does not mean that there is none, because manufacturers are not absolutely sure about wood drying.

Generally speaking, the moisture content of wood is higher than that of air, so even if there are no expansion joints left during the production process, there will be joints after the furniture is made, and quite a lot of furniture has seams regardless of the wet and dry seasons, but the size is different.

3. In areas with a large difference between dry and wet in the environment throughout the year, expansion joints must be set. During the rainy season, the air humidity is high. Although the wood is artificially dried, it still absorbs moisture and adds volume during furniture production.

Generally, it is not necessary to leave the expansion joint. Expansion joints also occur in dry winter climates; Spring and winter are dry. When making furniture from artificially dried wood, it is generally necessary to leave expansion joints, otherwise, when the wet summer comes, the large edges will be damaged.

I know that the role is particularly large, is one of the traditional Chinese processing technology, is an excellent production process, can avoid thermal expansion and contraction, can extend the service life of this furniture, is a very good style.

Solid wood furniture must have expansion joints.

The existence of expansion joints plays a huge role in curbing the physical characteristics of thermal expansion and cold contraction of wood and improving the service life of solid wood furniture.

The expansion joint is to prevent the frame or corner tenon of the furniture from being cracked when the wood shrinks or expands due to the external environment, resulting in the loosening of the parts of the furniture and the inability to use normally.

The size of the expansion joint is very important, and the width is determined by the specific gravity of the wood and the climatic characteristics of the region where the furniture is ultimately used. The width of the expansion joint is generally within centimeters, more than centimeters are more ugly, if the panel is not too wide, it is completely unnecessary to exceed. The expansion joints are too wide, and the wood is generally not dry well when making furniture.

Not necessarily, depending on what kind of product, the high-grade ones are generally solid wood as a whole, and the cheap ones are of course made of wood, and the heat expansion and contraction coefficient of the wood itself is not large, and some manufacturers exaggerate the role of expansion joints in order to promote it. Of course, if there is a lot of silver, you don't have to think too much, if there is less silver, it is much cheaper to buy one with expansion joints, and there is no big difference in the specific use (including taste, etc.).

A must! As long as it is solid wood furniture, there must be a seam, because solid wood furniture is not like panel furniture, the wood has been beaten into powder or small particles, solid wood furniture is used as a whole material, so that the wood is still woody, and it will absorb moisture in the air, and there will be expansion and contraction, and this seam is reserved for the expansion and contraction of furniture.

1.To be on the safe side, it is normally required, unless the panel area is not very large.

2.Wood has the characteristics of wet expansion and dry contraction, and the function of expansion joints is to leave space for the expansion and contraction of wood to prevent cracking.

The wood is not fully dry, there must be expansion joints, but the use is the same, ** much cheaper than without expansion joints, now look at the oak furniture is better, Jiangbei Suojiang stone has a factory direct sales, you can go to see.

The shrinkage joints of solid wood furniture are generally left after the edge, which is mainly reflected in the more panels, especially the tabletop.

Because the desktop board is afraid that the corners are easy to scratch people and the needs of beauty, it will generally make streamlined shape edge strips, which are not only beautiful, but also play a decorative role, and can effectively prevent accidental injury.

There is one of the main reasons why the desktop is often exposed to heat; cold; Water, in short, the environment is unstable, solid wood is afraid of these factors to cause bagging, cracking, etc., if there is no gap around the board to expand and shrink the space, the countertop will be deformed. This seam plays this role, which is said to have existed when Luban was there, but it is not as systematic as it is now.