SU1715656A1 - Line for making corrugated cardboard - Google Patents

Abstract

This invention relates to the pulp and paper industry. The purpose of the invention is to improve the quality of corrugated board and reduce the size of the line. The line for the production of corrugated cardboard includes two corrugated sections 1 and 2 with two corrugated corrugated presses made mirror-like with each other. Two rolls 7 and 8 located between sections 1 and 2, a gluing machine, a drying table 10 with upper and lower working surfaces, having two mechanisms of clamping from the upper and lower sides of the table, cutting and transporting section and laying machine. 2 Il.

Description

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The invention relates to lines for the production of corrugated three-layer cardboard and can be used in the pulp and paper industry.

A known line for the production of corrugated cardboard, including a corrugated section, a peal, a gluing machine, a drying table with an upper working surface, a cutting-transporting section, a sheet-laying machine.

A disadvantage of the known device is low productivity.

The closest to the proposed invention is a shaft for the production of corrugated cardboard, comprising two corrugated sections, two rolls, a gluing machine, a drying table with an upper working surface, a cutting and transporting section, a sheet-laying machine. On the line, two three-layer corrugated cardboard sheets are produced, and the corrugated cardboard is dried; both blankets are passed over the drying table.

The disadvantages of this line are that the second sheet lies on the first one, which is on the drying table, therefore the second sheet is less heated than the first one, and therefore the drying process of the second sheet has a lower intensity than the first one. This leads to the fact that in order to ensure normal drying of the second web, the transport speed of the corrugated cardboard webs is reduced and, consequently, the productivity of the line decreases. In addition, the first canvas directly on the drying table will dry out, which leads to warping of the first corrugated cardboard sheet, deterioration of the quality of the corrugated cardboard and rejects.

The aim of the invention is to improve the quality of the corrugated board and reduce the dimensions of the line.

This goal is achieved by the fact that in a line for the production of corrugated cardboard, including two corrugation sections, two rolls, a gluing machine, a drying table with an upper working surface, a cutting-transporting section and a sheet-laying machine, a drying table is made with an additional lower working surface and provided the additional mechanism of a clip from the lower party.

Making the drying table with an additional lower working surface allows the second sheet to be dried on it in the same conditions as the first one (the covering sheet of the glued three-layer cardboard is in direct contact with the drying table). Ensuring normal conditions for drying the first and second corrugated cardboard leads to an increase in the productivity of the line and the quality of the corrugated cardboard. An additional clamping mechanism from the bottom side provides the pressing of the corrugated cardboard to the bottom surface of the table.

FIG. 1 is a schematic representation of a line for producing corrugated board; in fig. 2 - line drying table.

The lines for the production of corrugated cardboard include two corrugated sections 1 and 2, consisting of rolls 3, heaters 4, corrugating presses 5 mirrored relative to each other, accumulative bridges 6. Two double-layer corrugated cardboard sheets are produced on corrugated sections 1 and 2. On rolls 7 and 8, located between sections 1 and 2, rolls of a covering sheet are installed. After the corrugating sections 1 and 2, the following machine 9 is installed, followed by the drying table 10 and the cutting and transporting section 11, the latter consisting of rotary shears 12, the cutting and cutting machine 13, the cross-cutting machine 14. A sheet paver is installed behind the cutting and transporting section 11 15. The drying table 10 is made with an upper working surface 16 and with an additional lower working surface 17, and is also provided with an additional clamping mechanism 18 on the lower side.

Line for the production of corrugated cardboard works as follows.

From rolls 3 of the corrugating section 1, paper webs are rolled up that heat up on preheaters 4 and fed to a corrugating press 5. On a corrugating press 5, one web corrugates and sticks to the second, flat, resulting in a two-layer corrugated cardboard that accumulates on the storage bridge 6, and in front of it By applying to the gluing machine 9, the web is heated on the preheater 4. The gluing machine 9 applies glue to the tops of the corrugations of the double-layer corrugated cardboard, after which the web is fed to the upper working surface 16 of the drying station la 10. There also is provided with a cover web of roll 7, where they compound. The second three-layer sheet of corrugated cardboard is produced similarly to the corrugation section 2, roll 8, gluing machine 9, and it is fed to an additional lower working surface 17. On the drying table 10, the coating sheets are combined with two-layer corrugated by heating and crystallizing the adhesive, resulting in two three-layer cloths, and the cover cloths lie on the heating surfaces of the drying table 10. The pressing of the upper blade to the upper working surface 16 is carried out with conventional means, and the second blade to the lower working surface 17 - an additional mechanism 18 clip. After the drying table, 10 and the first and second three-layer corrugated cardboard sheets are further processed (each according to the format requirements), rotary shears make cutting of scrap, rifle-cutting machine produces rivet and longitudinal cutting, as well as cutting of edges, the cross-cutting machine - cross cutting of a cloth on the set length of formats. The resulting corrugated cardboard sheets are stacked into piles. -

Claims (1)

Invention Formula Lines for the production of corrugated cardboard, including two corrugated sections with two corrugated presses, two rolls, a gluing machine, a drying table with an upper working surface, a pressing mechanism on the upper side of the table, a cutting and transporting section and a sheet stacker, which is different in that improving the quality of the corrugated cardboard and reducing the dimensions of the line; the drying table is made with an additional lower working surface and is equipped with an additional clamping mechanism on the underside, with both rolls Position the crimping between sections, and gofrop- RESS made specular in relation to each other. JZ, JS. (Put- 2.