Tobacco negative pressure feeding technique and device thereof

Abstract

The invention discloses a tobacco negative pressure feeding technique and a device thereof, belonging to the technical field of cigarettes. By utilizing an intermittent type negative pressure feeding manner, the invention enables the tobaccos to absorb feed liquid in a certain amount when being placed in a roller in a negative pressure state so as to reach the tobaccos evenly and absorb quickly. The negative pressure device can meet the requirement of the new technique and improves the feeding precision, the evenness and the production speed. The negative pressure feeding product in the invention improves the whole precision, ensures the stable feeding process and shortens the tobacco storing period; besides, as the feeding evenness is improved, the final quality score of the product increases, and the quality of cigarettes is also improved.

Description

technical field [0001] The invention belongs to the technical field of cigarettes, and in particular relates to a negative pressure feeding process for tobacco leaves and a feeding device thereof. Background technique [0002] Tobacco leaf feeding is to add a certain proportion of specific feed liquid to the tobacco leaves to remove and cover up the stimulation generated during the tobacco leaf smoking process. The overall technical requirements are: the overall feeding accuracy meets the feeding formula ratio, the feeding process is stable, and the feeding is uniform. And ensure that the feed liquid is fully absorbed by the tobacco leaves. [0003] The feeding of the prior art is the feeding of a drum feeder, and the continuous feeding mode is adopted for production. The feeding is carried out by a group of feeding nozzles installed in the drum. The feeding nozzles are set at the feed end or discharge end of the drum. Through a certain steam pressure, they are mixed and at...

AI Technical Summary

Problems solved by technology

[0005] Since the existing feeding is controlled by an electronic scale before feeding, affected by the moisture fluctuation of the tobacco leaves, the real total weight of the tobacco leaves in each production batch is inconsistent with the weighed weight, resulting in a mismatch between the total amount of feed liquid applied in each batch and the amount of tobacco leaves

On the surface, the application ratio is consistent with the formula requirements, but in fact the overall accuracy is poor

At the same time, because the existing feeding is continuous production, affected by the double influence of tobacco leaf flow rate and incoming tobacco moisture, coupled with a certain hysteresis of the control system, the control of the feeding process is unstable, the accuracy fluctuates greatly, and the impact on product quality is also relatively large. Big

[0006] 2. Poor feeding uniformity

[0007] Since the existing feeding is continuous feeding, the tobacco leaves in the feeding drum move simultaneously in the horizontal and axial directions, and at the same time, the feeding is carried out through a group of feeding nozzles arranged at the feeding end or the discharging end of the drum. The liquid spraying area is limited, and it is impossible to ensure that each piece Tobacco leaves are fully exposed to the feed liquid, the uniformity of feeding is not well controlled, and the uniformity of product quality cannot be guaranteed

[0008] 3. After feeding, the tobacco leaves absorb the feed liquid slowly, and the storage time is long, which affects the production progress

[0009] Since the existing feed is fed under normal pressure, the feed liquid is sprayed on the surface of the tobacco leaves. It needs to be stored for 2 hours to 48 hours to ensure that the feed liquid is fully absorbed by the tobacco leaf raw materials. The storage time is long and has a great impact on production.

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