A multi-layer corrugated cardboard production line

Abstract

The invention discloses a multi-wall corrugated board production line and belongs to corrugated board production equipment. The multi-wall corrugated board production line is characterized in that a constant temperature humidification device composed of arch bars, a piece of heat insulating film and a spray pipe is arranged on two lateral galleries of a paper conveying overpass, a flat beam is arranged at the middles of the tops of the arch bars, the heat insulating film is paved towards the two sides from the flat beam, the fixed end of the heat insulating film is firmly connected with the flat beam, the movable ends of the heat insulating film are movably connected with two sides of the paper conveying overpass, the insulating film covers the whole paper conveying overpass to form a closed paper conveying passage, and the paper conveying passage is respectively joined with a single surface corrugated machine and a gumming machine; a humidification device composed of an air inlet pipe and an air storage tank is arranged below the paper feed side of a pre-heating cylinder of a paper pre-heater, two ends of the air storage tank are fixed on the stand in a welding mode, an air outlet is formed in the air storage tank, and one end of the air inlet pipe is connected with a steam device while the other end is connected with the air storage tank. By means of the multi-wall corrugated board production line, the yield is greatly improved, the warping and degumming phenomenons of the multi-wall corrugated board are reduced, and the pass percent is greatly improved.

Description

technical field [0001] The invention belongs to corrugated cardboard production equipment, in particular to a corrugated cardboard production line. Background technique [0002] The corrugated cardboard production line is an assembly line composed of roll base paper after corrugated pressing, gluing, bonding, paper separation and creasing, cross-cutting into standard cardboard, and output by code. The currently used corrugated cardboard production line consists of two relatively independent process sections, the wet end equipment and the dry end equipment. The wet end equipment mainly includes base paper support racks, automatic paper splicers, surface paper preheaters, and core paper preheaters. , single-sided corrugating machine, paper feeding bridge, gluing machine, double-sided machine, etc., the wet end equipment makes corrugated base paper into three-, five-, and seven-layer corrugated cardboard with different combinations of flute types; the cadre equipment mainly inc...

AI Technical Summary

Problems solved by technology

There is a paper feeding bridge between the single-facer corrugator and the gluing machine. The temperature of the corrugated paper coming out of the single-facer corrugator is 50-60°C, which is still sufficient for the gelatinization temperature of the starch in the glue. However, in the south, due to the indoor and outdoor temperature in winter Low relative humidity, the corrugated paper coming out of the single-facer needs to be transported to the paper bridge, and the moisture in the paper evaporates quickly during the conveying process, and the surface temperature of the corrugated paper drops to 20-30°C, resulting in slow gelatinization of the starch in the glue. In order to ensure good bonding of multi-layer corrugated cardboard, the speed must be reduced, otherwise, the cardboard is prone to degumming, the output of the team is greatly reduced, and the normal production is affected; at the same time, because the moisture in the paper in the single-facer machine is released in winter, the face paper and the cardboard come out. When the moisture content of the lining paper tends to be consistent with the moisture content in the surrounding air, the lining paper releases moisture and shrinks, and the surface paper absorbs moisture and expands. The two forces cause the cardboard to warp upward, especially for the production of three-layer cardboard. The pass rate of cardboard is low, resulting in a large number of returns from customers

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