Method for on-line nondestructive detection and regulation of cigarette blank density

Abstract

The invention relates to a method for on-line nondestructive detection and regulation of cigarette blank density, comprising the steps of connecting a repressing machine pressure head (1) installed on a rack (6) with a sampling detection driving hydraulic system (3) through a hydraulic pipeline, arranging a pressure sensor detecting system (2) which is connected with an electronic control system (4) and is provided with nine pressure sensors on the pressure head, connecting the electronic control system and a material equalizing system (5) of a preformer in the meantime; when the cigarette blank is repressed by the repressing machine pressure head, removing pressure deviations of nine points of each cigarette blank on line, reflecting density conditions of the nine points of the cigaretteblank after subjecting to electronic control conversion, feeding back detection results of densities to the electronic control system, regulating the material equalizing system of the preformer on line and controlling the density uniformity of the packaged cigarette blank. By means of the method provided by the invention, the nondestructive on-line sampling can be realized and the material equalizing system of the preformer can be on line regulated in real time to ensure that the technological requirement for the density uniformity of the cigarette blank in a box can be satisfied.

Description

technical field [0001] The invention relates to a method for on-line detection of the density of tobacco blanks after packaging in the threshing, redrying and pre-compression packaging section in the tobacco industry, and timely online real-time adjustment of the material distribution mechanism after passing the on-line detection. Background technique [0002] At present, there are two methods for detecting the density of tobacco billets in the box in China: the first one uses a nine-point sampling tube to sample the tobacco billets in the box and randomly selects them from the finished product after the tobacco billets are packaged. The tobacco blanks in the box are destructively sampled using a special density sampling detection method, which cannot be tested for each package, and the adjustment of the uniformity of the tobacco blank density is seriously lagging behind; the second method is to add an X-ray inspection after the pre-pressing packaging section The nine-point ...

AI Technical Summary

Problems solved by technology

[0002] At present, there are two methods for detecting the density of tobacco billets in the box in China: the first one uses a nine-point sampling tube to sample the tobacco billets in the box and randomly selects them from the finished product after the tobacco billets are packaged. The tobacco blanks in the box are destructively sampled using a special density sampling detection method, which cannot be tested for each package, and the adjustment of the uniformity of the tobacco blank density is seriously lagging behind; the second method is to add an X-ray inspection after the pre-pressing packaging section The nine-point density "ionizing radiation method" used to detect the density of tobacco blanks in the box is characterized by the realization of online non-destructive testing of the tobacco blanks in each box, and the timely feedback of the status of the uniformity of the tobacco blank density in the box, which is easy to adjust , but this method is expensive and uses online X-ray detection, and cannot be isolated separately, the radiation is strong, and it will cause certain damage to the operator's body

In addition, X-rays will attenuate after penetrating substances. It is necessary to perform a calibration test to determine the parameters of the same type of smoke. The amount of data is large, and calibration is difficult. The authenticity of the test directly affects the test results. There are many uncontrollable factors, such as parameters If the constant is biased, the detection value is actually unreliable

Images