What is the manufacturing process of birch plywood

The production process of birch plywood begins with the careful selection of high-quality birch. The selected birch usually comes from forest areas with excellent growth conditions, where the soil is fertile and the sun is abundant, ensuring the excellent texture and color of the wood. After the logs are harvested, the manufacturer will conduct a strict quality screening to remove wood with defects such as cracks, insect holes or decay, ensuring that only high-quality logs enter the subsequent processing stage.

The selected logs will be sent to the debarker for bark removal, which is completed mechanically or chemically. This key step is completed. The bark contains a lot of impurities and moisture, which can have a negative impact on the quality and stability of the plywood. Therefore, the surface of the debarked logs remains smooth, laying a good foundation for subsequent cutting and processing.

Next, the logs enter the cutting machine for slicing. In this process, the logs will be cut into uniform thin wood slices according to the required plywood thickness and number of layers. The thickness and size of the slices must be consistent to ensure the flatness and stability of the plywood. In addition, the wood chips need to be graded during the slicing process to ensure that the quality of the same batch of wood chips is the same, thus providing favorable conditions for subsequent assembly and pressing.

After slicing, the wood chips will undergo professional drying to remove excess moisture from the wood. During the drying process, advanced drying equipment is used to accurately control the temperature and humidity to ensure that the wood chips will not crack or deform due to excessive water loss during the drying process. The moisture content of the dried wood chips is moderate, which lays a good foundation for subsequent gluing and pressing.

Gluing is a crucial step in the manufacturing process of birch plywood. Before gluing, the wood chips need to be screened again to ensure that their surface is flat and flawless. Subsequently, environmentally friendly glue is evenly applied to the surface of the wood chips using professional gluing equipment. Controlling the amount of glue is crucial to ensure a strong bond between the wood chips and to avoid excessive glue causing uneven plywood surfaces.

The glued wood chips will be assembled in a specific order and direction. During the assembly process, it is necessary to ensure that the grain directions between the wood chips are perpendicular to each other to enhance the strength and stability of the plywood. At the same time, according to customer needs and the specific use of plywood, the number of layers and thickness of wood chips are adjusted to meet the requirements of different application scenarios.

After the plywood blanks are assembled, they will be sent to the hot press for pressing. The hot press uses high temperature and high pressure to quickly solidify the glue, thereby firmly bonding the wood chips together. During the pressing process, the temperature, pressure and time are strictly controlled to ensure that the plywood does not have quality problems such as cracks or deformation during the pressing process. In addition, the design and manufacture of the hot press fully consider energy conservation and environmental protection, aiming to reduce energy consumption and environmental pollution.

The pressed plywood needs to go through the cooling and curing stages to ensure that it achieves the best physical properties and stability. During the cooling process, natural cooling or forced cooling can be used, depending on the production environment and the thickness of the plywood. The surface of the cured plywood is flat and smooth, with high strength and stability, meeting the market demand for high-quality plywood.