Sectional conveying and sectional heating type double-sided machine

Abstract

The invention relates to a sectional conveying and sectional heating type double-sided machine. The machine comprises a front hot plate conveying part and a rear conveying part, an air-permeable heating transition section is arranged between the front hot plate conveying part and the rear conveying part and provided with an air-permeable heating channel, heat sources are arranged on the upper sideand/or the lower side of the air-permeable heating channel, rollers for preventing a surface paper printing layer from being scratched is arranged on the upper side of the air-permeable heating channel, a plurality of rollers are arranged, and air-permeable gaps are formed between the rollers. According to the sectional conveying and sectional heating type double-sided machine, through sectionalconveying, each conveying section can have different functions, for example, rapid double-sided heating is conducted on the front portion, the bonding speed of the surface paper and the corrugated paper is increased, then the surface paper and the corrugated paper are conveyed to the air-permeable heating transition section, heating can be conducted, bonding of the surface paper and the corrugatedpaper continues to be enhanced, and meanwhile air-permeable and accelerated drying can be achieved, so that the bonding paste of the surface paper and the corrugated paper is dry and stable, in addition, the situation that the paperboard quality is affected due to the fact that too much water exists in paper is avoided, and the paperboard quality and the production efficiency are both guaranteed.

Description

technical field [0001] The invention relates to a double-facer for cardboard production equipment, in particular to a segmented conveying and segmented heating type double-facer that improves the bonding speed and quality of face paper (which can be pre-printed paper) and pitted paper. Background technique [0002] The development of corrugated cardboard production equipment is closely related to the printing process. There are currently three types of pre-printing: [0003] 1. Offset pre-printing: good printing quality, low plate making cost, low printing plate durability, and non-environmentally friendly solvent-based inks are used. [0004] 2. Gravure pre-printing: the printing quality is good, the cost of plate making is high, the printing durability is good, and solvent ink is used. [0005] 3. Flexo pre-printing: good printing quality, low cardboard cost, moderate printing durability, and environmentally friendly water-based ink for cartons. [0006] These three pre-...

AI Technical Summary

Problems solved by technology

[0008] However, there are two main ways of feeding paper in the current double-sided machine. One is that the printing layer of the pre-printed paper is facing downward when conveying. Combined with the situation of high-speed conveying, the surface temperature of the printing layer is very high, so the surface of the printing layer of the pre-printed paper needs to be equipped with a high-temperature resistant film, so the cost is greatly increased; the high-temperature resistant film and the hot plate sliding friction will cause scratches High temperature resistant film, making the surface of the carton have a poor drawing and scratching feeling

[0009] The other is that the printing layer of the pre-printed paper faces upward during transmission, and the printing layer moves synchronously with the conveyor belt above the hot plate channel, so it is not easy to scratch. However, the derived problem is that the temperature on the upper side of the hot plate channel of the double-sided machine is not enough, so that The adhesion between the pre-printed paper and the pit paper is poor, and because the conveyor belt has poor ventilation, it affects the drying efficiency of the paste and the quality of the cardboard

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