Method and device for identifying strip inhomogeneity of a strip of material in the tobacco processing industry
A technology of material strips and uniformity, applied in the field of material strips, can solve problems such as false positive signals
Active Publication Date: 2020-01-21
KOERBER TECH GMBH
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Problems solved by technology
Therefore, the width of the fluctuations that occur during manufacture limits the sensitivity of detection of foreign objects or other inhomogeneities
The dilemma is therefore that a narrow limit value must be used to detect small foreign objects, and that, on the other hand, a narrow limit value is used even in the absence of actual interfering inhomogeneities in the case of the normally occurring fluctuation width of the measurement signal. False positive signals (Positivsignalen) for foreign object detection also in the case of
Method used
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[0051] exist figure 1 A two-twin cigarette making machine of the "PROTOS" type from the applicant company is schematically shown in , which is composed of a two-twin machine 2 and a filter fitting machine 3 in an "L-shaped" configuration. exist figure 1 The machine 1 is shown with a closed cover, without details for reasons of overview.
[0052]The following briefly introduces several stations of cigarette manufacturing. The manufacturing process of two continuous tobacco rods starts in a two-line machine 2 in a two-line distributing unit 4 with a pre-distributor 5 comprising, inter alia, a steeply inclined conveyor and two packing shafts and other known components. Therein, the loose tobacco material is conveyed to a first and a second parallel conveyer 6 and is shaken off from below onto the rod conveyer, thereby forming two tobacco rods, which are The suction air is held on the strip conveyor. The tobacco material is conveyed towards the first and second format units 8...
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The invention relates to a method for identifying non-uniformities in a strip of material from the tobacco processing industry, in particular a tobacco strip or a filter strip, wherein the material strip is passed longitudinally through at least two measuring machines operating at different measuring frequencies. Strip measuring device conveyed. The invention also relates to a device for identifying strip non-uniformities in a strip of material for the tobacco processing industry, a strip former for the tobacco processing industry, an application and a software program. In the method according to the invention, at least one comparison variable is derived independently of each other from the measurement signals of at least two strip measuring devices, forming a difference of a comparison variable of the at least two strip measuring devices or consisting of a plurality of Difference vectors resulting from a plurality of differences of variables are compared and it is detected whether the difference or the difference vector lies within a predetermined or predeterminable tolerance range, an excess of the tolerance range being signaled Inadmissible strip unevenness.
Description
technical field [0001] The invention relates to a method for detecting rod inhomogeneity (Stranginhomogenitäten) of a material rod in the tobacco processing industry, in particular a tobacco rod or a filter rod, wherein the material rod passes longitudinally and axially through at least two different measurements The bar measurement device for frequency operation is conveyed. The invention also relates to a device for identifying strip inhomogeneities of a material strip for the tobacco processing industry, a rod forming machine for the tobacco processing industry, an application and a software program. Background technique [0002] Rods of material, such as tobacco rods or filter rods, are produced in the manufacture of rod-shaped articles for the tobacco processing industry, in particular filter cigarettes. The tobacco or filter rod is cut to length after its manufacture into individual tobacco or filter rods. A common material for making filter rods is tow made of cellu...
Claims
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IPC IPC(8): A24D3/02A24C5/34
CPCA24C5/34A24D3/02A24C5/3412
Inventor D.施勒德
Owner KOERBER TECH GMBH