Hard impurities with small size, heavy weight and smooth shape (such as broken seeds), under the action of the centrifugal force of the roller, are in the first impurity zone along the tangential direction of the roller. Special equipment for the textile industry on the winder. As the last process of spinning and the first process of weaving, winding is the link between the past and the next.“bridge”Therefore, it occupies an important position in the textile field.
Grinder A spinning machine that turns fiber strands into rovings. The main function is to draft and twist, and to wind the roving into a certain package to meet the processing requirements of the spinning frame. The structure of the double twisting unit of the double twisting machine mainly includes the spindle braking device, the spindle part of the double twisting machine, the yarn winding device, and the special device of the double twisting unit.
It is light in weight, with broken fibers on the surface, sterile seeds, etc. After leaving the tip of the serration, it is blocked by the airflow of the adhesion layer, and the falling speed is slow. Large, light weight, fluffy shape with fiber seed chips and dead fiber cotton sheets that are attached to the surface air resistance, too late to sink and get clogged with dust at the tip of the blade. (1) The height of the dust removal knife: When the distance between the cotton board and the small bottom plate is certain, the height of the dust removal knife determines the length of the first and second stray zones.
Reducing the dust removal knife is equivalent to increasing the length of the first mixing zone. Broken seeds, sterile seeds, hard lumps and other large hybrids have more chances to fall in the first hybrid area due to the large growth space of the hybrids. Due to the length of the first stray zone and the thickening of the boundary layer, the dust removal knife covers more fibers and impurities floating on the boundary layer, the cotton drop rate increases, and the cotton drop rate also increases.
Therefore, if the raw cotton contains a large amount of b impurities, to remove more impurities in the elbow before the knife, you can take the dust removal method of reducing the knife height, otherwise, lift the dust removal knife. The adjustment range of the relative distance between the height of the dust-removing knife of the A186 card and the surface of the frame is -6mm. (2) The angle of the dust removal knife: see Figure 2-16, the angle of the dust removal knifeαThat is, the angle between the back of the dust removal knife and the horizontal plane of the machine frame.
The size of the angle of the dust removal knife affects the noil rate of the car belly and the impurity rate of the cotton. When the angle is small, the air comb on the back of the knife is relatively fast, and an eddy current is formed in the triangular area between the feeding board, the licker-in roller and the dust-removing knife, and the impurities and short fibers blocked by the dust-removing knife will be taken away by the licker-in roller again. At the same time, it will weaken the recovery of the air flow from the back of the blade to the inlet of the small bottom, and the waste in the rear belly contains more long fibers.
The installation angle of the dust-removing knife of the A186 carding machine is 75°~90°. The height and angle of the dust removal knife must be combined and developed to be adjustable. At present, enterprises generally use low knife and large angle.
Low knives increase noil and recycle long fibers at a high angle. (3) And the dust removal knife thorn convergence meter: a constant distance between a plate and the dust removal knife cotton, between the small dust removal knife and the licker-in, the better dust knife holder with serrated fibers, can better Removes impurities adhering to dry fibers, impurities are beneficial, but too small will cause a drop of white flowers. Currently commonly used 12/1000 - 20/1000 inches.