Basal piece forming device for reconstituted tobacco production by means of dry method of paper-making

Abstract

The invention relates to a substrate forming device for producing reconstituted tobaccos through a dry paper-making method. The substrate forming device comprises a forming mesh belt, a mesh belt conveying device, a machine frame 18 and forming heads. Each set of forming heads is symmetrically provided with a first screen drum 13 and a second screen drum 14, two fiber conveying pipes are arranged in each screen drum in the axial length direction of the screen drum, the two fiber conveying pipes are symmetrically arranged on the upper half portion in the corresponding screen drum, the lower portions of the screen drums are provided with scattering rollers, and the scattering rollers are located under the centers of the screen drums. Front annular channels are arranged between the fronts of the first screen drums and the fronts of the second screen drums, rear annular channels are formed between the backs of the first screen drums and the backs of the second screen drums, and the annular channels enable the inner spaces of the screen drums to be communicated. Two fiber conveying pipes are arranged in each screen drum and the lengths of the fiber conveying pipes are different, so that fiber outlets are increased, and the fiber conveying accuracy is effectively improved; a front annular channel and a rear annular channel are formed between the two screen drums in each forming head to communicate the spaces in the two screen drums, so that fibers stacked inside the parts, located at the two ends of each screen drum, of a box body are reduced.

Description

[0001] The present invention claims the priority of a Chinese invention application with the application date of March 7, 2014 and the application number CN2014100837143 for a substrate forming device for producing reconstituted tobacco leaves by dry-process papermaking. technical field [0002] The invention belongs to the technical field of tobacco material manufacture. In particular, it relates to a substrate forming device suitable for producing reconstituted tobacco leaves by dry papermaking. Background technique [0003] Reconstituted tobacco leaves, also known as reconstituted tobacco leaves and homogeneous tobacco leaves, are mainly composed of tobacco powder, chips, tobacco stems or low-grade tobacco leaves, plus some foreign fibers, adhesives and other additives. Reconstituted tobacco leaves have been widely used in cigarette production as a raw material for tobacco products. The reconstituted tobacco leaves made of low-grade tobacco raw materials have the charact...

AI Technical Summary

Problems solved by technology

The existing air-laid paper production equipment and the air-laid paper base sheet forming device have only one fiber delivery pipe, and the fibers cannot be evenly fed into the screen drum through a single pipe, and the fibers cannot be evenly scattered by the breaking rollers and fall onto the forming net; Secondly, the existing air-laid paper production equipment and the air-laid paper substrate forming device are in a box surrounded by two screen cylinders outside the forming head. During the production process, fibers will accumulate, and the accumulated fibers will enter the screen unevenly. Although the fiber is broken up by the breaking roller, the fiber still cannot evenly fall onto the forming net, and forms a lump of pulp, which affects the quality of the substrate.

[0007] Existing air-laid paper production equipment and air-laid substrate forming devices cannot meet the substrate forming requirements of dry-laid papermaking to produce reconstituted tobacco leaves. For example, Chinese utility model patent CN201320102329.X discloses a double-screen multi-channel airflow Powder sieve forming device, which only improves the quality and efficiency of papermaking, and does not involve the quantitative range of paper

Chinese patent application CN201310393610.8 relates to the dry-laid papermaking method reconstituted tobacco leaf packaging production line, but the essence disclosed in this patent application is a common production line for producing air-laid paper, and does not involve the dry-laid papermaking method to produce the special device for forming the substrate of reconstituted tobacco leaves

[0008] In addition, the quantitative fluctuation range of the air-laid paper produced by the existing air-laid paper production equipment is determined according to the standard, the standard number GB / T24292-2009, the quantitative fluctuation range specified in the standard is ≤ ± 10%, while the dry-laid papermaking method Substrate weight of reconstituted tobacco leaves≤22g / m 2 , Quantitative vertical and horizontal deviation ≤ ± 5%

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