What to pay attention to when using birch rotary cutting wood veneer
Birch rotary cut veneer has been widely used in the field of wood processing due to its excellent performance, but many aspects need to be paid attention to during use to ensure that it can achieve the best effect and ensure product quality.
1、 Raw material selection
Wood quality: When selecting birch logs, it is important to choose wood with clear grain, no obvious knots, decay, or pest infestations. High quality logs are the foundation for obtaining high-quality rotary cut veneers, and defects such as knots may affect the flatness and strength of the veneers, which can easily lead to problems during subsequent processing.
Moisture content control: The moisture content of birch wood has a significant impact on the rotary cutting process and veneer quality. Generally speaking, the moisture content of logs should be controlled within an appropriate range, usually between 8% and 12%. Excessive moisture content may cause wood slippage during rotary cutting, affecting the uniformity of veneer thickness; A low moisture content can make the wood brittle and hard, increase the difficulty of rotary cutting, and easily cause veneer cracking.
2、 Rotary cutting process
Tool selection and adjustment: The sharpness and angle of the rotary cutting tool directly affect the surface quality and thickness accuracy of the veneer. Suitable cutting tools should be selected and regularly inspected and sharpened to ensure their sharpness. At the same time, the angle of the cutting tool should be adjusted according to the material and hardness of birch wood. Generally, the angle of the cutting tool is between 18 ° and 22 ° to achieve good cutting effect.
Parameter setting for rotary cutting: It is crucial to set the speed, feed rate, and other parameters of the rotary cutting machine reasonably. Excessive rotation speed may result in rough surface of the single board, and even tearing phenomenon; Inappropriate feed rate can affect the thickness uniformity of the veneer. For birch wood, the optimal rotary cutting parameters need to be determined through testing and debugging based on its wood characteristics and veneer thickness requirements.
Single board thickness monitoring: During the rotary cutting process, the thickness of the single board should be monitored in real time to ensure that it meets the design requirements. Regular inspections can be carried out using equipment such as thickness gauges, and the parameters of the rotary cutting machine can be adjusted in a timely manner if thickness deviations are detected. At the same time, attention should be paid to the uniformity of the thickness of the veneer to avoid situations where it is locally too thick or too thin.
3、 Single board drying
Drying method selection: There are various drying methods for birch veneer rotary cutting, such as natural drying, artificial drying, etc. Natural drying has lower costs, but it takes longer to dry and is greatly affected by environmental factors; Artificial drying has high efficiency, but it is necessary to control the drying temperature and humidity well to avoid deformation and cracking of the veneer. In general, natural drying for a period of time can be used before artificial drying.
Drying temperature and humidity control: During the artificial drying process, the drying temperature should be gradually increased to avoid rapid heating that may cause excessive internal stress and cracking of the veneer. For birch veneer, the initial drying temperature can be controlled at 40 ℃ -50 ℃, and then gradually increased to 60 ℃ -80 ℃. At the same time, it is necessary to maintain stable humidity in the drying room. If the humidity is too low, the veneer will become excessively dry, which will affect its bonding performance and strength; If the humidity is too high, it will prolong the drying time and even cause the veneer to mold.
4、 Single board storage and transportation
Moisture prevention measures: Birch veneer can easily absorb moisture from the air, so moisture prevention measures should be taken during storage and transportation. Moisture resistant packaging materials such as plastic film can be used to package the veneer and store it in a dry, well ventilated warehouse. The warehouse floor should be covered with moisture-proof mats to avoid direct contact between the veneer and the ground.
Avoid damage: When handling and transporting veneers, handle them gently to prevent them from being damaged by collisions, scratches, etc. Specialized handling equipment and tools, such as pallet forklifts, can be used to ensure the safe transportation of single boards. At the same time, attention should be paid to the stacking method to avoid deformation of the single board due to excessive or unreasonable stacking.
When using birch veneer rotary cutting, strict control and attention to every detail from raw material selection to processing, storage, and transportation are necessary to ensure the quality and performance of birch veneer rotary cutting, and to better apply it in furniture manufacturing, architectural decoration, and other fields.
