A method for detecting air leakage of cigarettes

Abstract

The invention discloses a cigarette permeability on-line detection method which is applied to a cigarette making and plug assembling machine set. The method is characterized by comprising the following steps of applying positive-pressure air onto a cigarette ignition end on a detection drum wheel, respectively installing a pressure sensor on two ends of a cigarette to detect the pressure value on the air inlet end and the air outlet end, applying the identical positive-pressure air onto the filter tip end of the cigarette on a next slot, installing a pressure sensor on the cigarette ignition end to detect the pressure value on the air outlet end, transmitting the three pressure values to a controller processing unit to be calculated, judging the cigarette permeability, outputting a removal signal, and removing the cigarette with unqualified permeability on a removal drum wheel. By adopting the method, the influence of the air pressure fluctuation and different brands on the detection of the permeability can be reduced. The online detection precision and accuracy of the cigarette permeability can be improved, the quantity of the cigarettes with unqualified permeability in the market can be reduced, and the cigarette quality can be improved.

Description

technical field [0001] The invention relates to an on-line detection method for the air leakage of cigarettes, in particular to a method for on-line detection of the air leakage of cigarettes on a crimping unit. Background technique [0002] With the development of the tobacco industry, the competition is becoming more and more fierce, and the requirements for the quality of cigarettes are also getting higher and higher; the purpose of online inspection of cigarette quality is to conduct online real-time identification of defective cigarettes such as air leakage, shortness, and shape. , and reject unqualified cigarettes; if the quality inspection is not accurate enough, it will cause unqualified cigarettes to enter the follow-up link. Once they enter the market, it will have a huge impact on the quality image of the tobacco factory; among them, the air leakage of cigarettes directly affects the quality of cigarettes. Therefore, the air leakage test of cigarettes is a link th...

AI Technical Summary

Problems solved by technology

[0004] The ZJ17 crimping unit is the main model of the domestic cigarette factory. Its existing air leakage detection is to install a pressure sensor on the filter end of the cigarette for detection, and the pressure value obtained from the detection is the only basis for air leakage judgment; use this Judging the air leakage of cigarettes with a single variable can only be compared with a fixed reference value set in advance; in practical applications, affected by other disturbances such as air source fluctuations and mechanical vibrations, the actual measured filter tip pressure The value will fluctuate greatly, and different brands of good cigarettes will also lead to large differences in measured pressure values ​​due to different degrees of air leakage; therefore, this method of judging by using a single variable and a fixed reference value will cause large errors, and may even lead to misjudgment, resulting in qualified cigarettes being mistakenly rejected, or unqualified cigarettes flowing into subsequent links, which will eventually cause huge losses

[0005] In the air leakage test, when the defect hole on the cigarette is close to the ignition end of the cigarette, the test gas will flow out from this hole. Since the system has a gas storage tank to stabilize the pressure, the pressure at the inlet end is relatively constant, and the gas released from the damaged hole The gas flow rate is not enough to have a significant impact on the intake pressure, so it will basically not affect the detected gas pressure passing through the shredded tobacco and filter. At this time, the defect of cigarette damage will not be easily detected, so the reliability of air leakage detection is very poor.

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