Product Description
After loosening, impurity removal, and mixing, the fibers are fed into the main carding mechanism to obtain further carding and form a single fiber state. Under the combined action of centrifugal force and airflow generated by high-speed rotation of the cylinder, the fibers detach from the serrations of the needle cloth, are transported by airflow and condensed on the mesh curtain (or dust cage), forming a fiber=dimensional disorderly arrangement of fiber mesh. The airflow forms a three-dimensional disorderly arrangement of fibers in the mesh, with MD: CD=1.1~1.5, and the final product is basically isotropic in the winter direction
Airflow forming a mesh usually requires a fiber length of no more than 80mm, as excessively long fibers can damage the appearance and uniformity of the mesh. Airflow forming a mesh can effectively process short fibers, such as wood pulp fibers with a length less than 10mm.
In order to improve the disorder of the arrangement of fibers in the final fiber mesh in the airflow network, the conveying pipeline is often structured using Venturi tubes. This type of pipeline is actually a variable cross-section pipeline, where the cross-sectional areas of any two sections in the pipeline are not equal, and the pipeline gradually expands from the inlet to the outlet. According to the principles of fluid mechanics, gases can be considered incompressible at atmospheric pressure.
Due to the fiber having a certain length, in a Venturi tube, its head and tail are located in two different cross-sections, so the velocity of the fiber head and tail is different. The velocity at the head is lower than that at the tail, so
The fibers undergo a change of direction, forming a disorderly arrangement.
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