It is very important to choose the opener to open with multiple sticks, which has a decisive influence on the effect of opening

    In the opening theory, it is very important to choose the multi-rod opening for the licker part of the opening machine, and it also has an important or even decisive influence on the opening effect.

       In most countries, the diameter of the thorn roll is about 250mm, but there are also some countries where the diameter of the thorn roll is different. For example, the C40 opener produced by Marzuoli in the 1970s had a licker roller diameter of 228mm, and the later C300, CX400, and C501 used a 350mm licker roller diameter, which is the largest among known openers. Polish CZ-690 licker roll diameter adopts 236mm size, American Hollingsworth adopts 229mm size, Japan CK7C adopts 208mm size, my country Qingji 1182 has adopted 200mm size, and contemporary out-of-production openers use small thorn reel sizes are OK903 and FA225 They use a four licker roller system, and their three licker rollers are all 172.5mm in diameter, which is the smallest among known openers.

    The diameter of the licker roller has an impact on the following problems:

1) It has an effect on the carding and transfer of fibers. Generally, when the diameter of the licker roller is small and the rotation speed is large, the fiber separation and carding effect is better, and it is also conducive to fiber transfer (especially when combing needles are used). This may be the reason why DK903 and FA225 adopt small diameter licker rollers. .

(2) It has an impact on the size of the cleaning area. If the diameter of the thorn reel is large, the cleaning area will be larger, which is beneficial to the arrangement of the cleaning area and the cleaning. For example, the diameter of the Mazzoli C501 opener is larger, which is 350mm , It arranges three groups of dust removal knives with cleaning suction nozzles, two deflection blades, and two combing plates under the licker roller. It is said that the cleaning effect is better, and 90% of the cleaning work can be completed in this area.

(3) It has an influence on the centrifugal force. Generally, when the diameter of the licker roller is small, the centrifugal force is larger at the same linear speed, which is beneficial to fiber transfer and impurities removal.