1. The plywood is cut from steamed softened logs into large sheets, and then the wood fibers are placed perpendicular to each other, bonded with a synthetic resin glue with good water resistance, and then pressed, dried, sawed, and surface-finished. Into the plate. The number of layers is odd, generally 3-13 layers, which are called plywood and plywood. The species used to make plywood are eucalyptus, birch, ash, eucalyptus, color wood, and willow wood. 2. Fiberboard is a board made by crushing, soaking, grinding and grinding waste materials such as bark, shavings, and branches into a wood pulp, followed by pressure molding and drying. Due to the different temperature and pressure during molding, it can be divided into three types: hard, semi-rigid and soft. 3. Particleboard is a sheet made of wood shavings or wood fiber with or without a compound applied. Particleboard has low density and uniform material, but it is easy to absorb moisture and has low strength. 4. Blockboard is an artificial board made of corner scraps generated during wood processing, shaped, planed, glued, spliced ​​and veneered. The core of the core is generally a short dry wood strip with a single layer of thin wood or plywood. Blockboard is not only an effective measure for comprehensive utilization of wood, but also obtains a uniform structure, stable size, large format and large thickness. In addition to surface decoration, it can also be used as a construction material. 5. Other explanations and emerging technologies for the production of wood-based panels: The raw materials used for wood-based panels, except for the plywood used for logs, are mostly from harvesting and processing residues, as well as small-diameter materials (less than 8 cm in diameter). Sheet, strip, needle, and granular materials that have been crushed or shaved and then shredded can be used for particleboard manufacturing. The chips are separated by fibers and used in the manufacture of fiberboard. This can increase the utilization of wood by 20 to 25% compared to the traditional use. In the 1970s, attention was paid to the use of bark and wood chips as raw materials for wood-based panels. However, bark can only be used in the middle layer of particleboard. The dosage should not exceed 8%, otherwise the strength of the product will be reduced. In addition, non-wood materials have also received increasing attention. In addition to bagasse, hemp stalks, etc., which have long been used in the production of wood-based panels, they have been expanded to a variety of plant stems and seed shells. The manufacturing process of various wood-based panels includes the following five main processes. Cutting process raw material processing and final product processing must use cutting processes, such as rotary cutting, planing, cutting of wood chips and shavings, grinding and separation of fibers, and sawing and sanding in final processing. Cutting the wood into units of different shapes and recombining them into various sheets in a certain way can improve certain properties of the wood, such as anisotropy, heterogeneity, swelling and shrinkage. The plate composed of large units has higher mechanical strength, and the plate composed of small units has better homogeneity. Precise control of the thickness error of the rotary cutting veneer can increase the yield of 2 to 3%. The cut wood shavings affect the overall physical and mechanical properties of the particleboard; the fiber morphology is also closely related to the strength of the fiberboard. The final sawing, grinding, etc. of the sheet also affect the quality of the product. We have two type gear pumps: oil gear pump and bitumen gear pump. oil gear pumps are divided into helical gear pumps and circular gear pumps. gear oil pump usually be used to transfer lubricating oil, if pump with bronze gear, pump also been used to transfer diesel fuel oil. pump have large flow rate and high pressure,strong suction. bitumen gear pump have three material: cast iron, cast steel and stainless steel. bitumen gear pump can bear 300 degree high temperature, pump have heat insulation jacket, can injuction hot water, hot oil and steam in to jacket circulation, keep pump warm, to prevent asphalt crystallization. Oil Gear Pump,Gear Oil Pump,Gear Lube Pump,Gear Lube Oil Pump Hengshui Yuanhan Trading Co.,Ltd , https://www.yuanhanpump.com