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

Abstract

The invention relates to a basal piece forming device for reconstituted tobacco production by means of a dry method of paper-making. The device comprises a forming mesh belt, a mesh belt conveying device, a machine frame 18 and forming heads, wherein each forming head is provided with a first screen drum 13 and a second screen drum 14 which are symmetrically arranged, two fiber conveying pipelines are arranged in each screen drum in the axial length direction and are symmetrically located on the upper half portion of the screen drum, a scattering roller is arranged on the lower half portion of each screen drum and located under the circle center of the screen drum, and a front annular channel and a rear annular channel are arranged on the front portion of each first screen drum and the corresponding second screen drum and on the rear portion of the first screen drum and the second screen drum respectively to enable the internal space of the screen drums to be communicated. Due to the fact that two fiber conveying pipelines in different lengths are arranged inside each screen drum, the number of fiber outlets is increased, and then fiber conveyance accuracy is effectively improved; the front annular channel and the rear annular channel are arranged between the two screen drums of each forming head to enable the space of the two screen drums to be communicated, and accumulation of fibers in the portions, on the two sides of each screen drum, of the interior of a box body is 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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