Single-sided machine because of flexible operation, easy to use, cheap price, small footprint and other advantages by small and medium-sized carton enterprises favor. However, some enterprises by using single machine production time is relatively short, corrugated cardboard production equipment and more complex, often occurs in the process of production problems, which not only influence the product quality, but also waste a lot of raw materials, good grasp of the single machine right to guide carton production, it is of great significance to improve the quality of the cartons. The following single-side machine production process in the common quality problems and solutions to discuss with colleagues.
A large area into a batch of glue
Corrugated peak on the adhesive coated line is white, gently rub with small starch particles off, this is the performance of the adhesive is not fully gelatinized. The reason is that the temperature of the hot roller does not meet the specified requirements, can not reach the gelatinization temperature of the adhesive. If it is found that the coating line of the adhesive is slightly shiny and does not stick fast, the reason is that the bonding speed of the adhesive does not match the speed of the adhesive and the viscosity of the adhesive.
When the tightness of the paper is large, the permeability is not strong, the surface adsorption ability and permeability of the adhesive is not strong, it is easy to occur in these situations. The solution is to improve the adhesive, enhance its penetration, or spray to the adhesive surface of the paper, slow down, increase the paper preheating surface. The amount of adhesive coating is too small will affect the adhesion. When checking, iodine solution can be used to smear the adhesive coating line, judge the coating situation according to the degree of turning blue, adjust the paste plate and increase the amount of adhesive coating.
Two, appear one or several longitudinal open glue
The main reason for this problem is that the gap of the corresponding guide board of the unglue line does not meet the requirements. The solution is to adjust the gap. When the clearance between the guide board and the lower corrugated is too large, the corrugated paper is not close to the tile roller, resulting in the compression of the corrugated paper and the surface paper at the pressure roller, the corrugated is flattened. At the same time, the gap between the guide cardboard and the lower corrugated roller is large. In order to apply the glue, the cots will move forward, and the lower part of the guide cardboard will be easily pushed and bent, resulting in the lower corner tip of the cardboard leaving a book mark on the corrugated surface, and the adhesion of the place. When the gap is too small, has an impact on the amount of glue, so that the surface paper and corrugated adhesion is poor.
Three, face paper wrinkle and collapse
Web paper due to transportation, loading and unloading, storage and other reasons, resulting in web paper is not round. When the paper is conveyed to the single-sided machine, it is loose and tight, causing the paper to wrinkle and collapse. The solution is to tighten the brakes moderately. The other situation is that the water content of the paper is not uniform, resulting in inconsistent expansion rate of the paper, the surface paper wrinkle and collapse, which can only be solved by the carton business personnel in the procurement.
Four, half a good half adhesion is poor
The reason for this problem is that the gap between the pressure roll and the lower corrugated roll should be between 0.3-0.4mm. Normal installation of the machine at both ends of the gap is less likely to be unequal, and the possibility of inconsistent pressure is greater, so the pressure should be adjusted first.
Five, be deflected
The common reason for the corrugated deviation is that the tooth position of the lower corrugated roller is not allowed on the single-sided machine, and the upper and lower corrugated rollers should be adjusted.
Six, surface paper appears and corrugated corresponding rolling marks
Slight rolling marks is a normal phenomenon. When the pressure of the pressure roller is too large, the surface paper will be affected by mechanical damage, and there will be deep rolling marks, and even slight fracture at the edge, which seriously affects the quality of corrugated cardboard and reduces the strength of the carton. The solution is to adjust the pressure of the pressure roller, pay attention to the combination of speed, paper thickness, paper conditions and other factors.
Seven, the edge of glue
There are several reasons for this:
1. High quantity of cardboard and too fast bonding speed;
2. The water content of carton base paper is too low;
3. The pressure roller adjustment is unreasonable;
4 adhesive caking, viscosity is not enough;
5 adhesive coating is too large, causing the edge of the paper peeling;
6. Irreasonable adjustment of guide board at the edge.
Eight, stare blankly
The main reason is that the corrugated roller is not parallel and the clamping pressure is insufficient, the corrugated roller should be adjusted.
Nine, high and low
The reasons are corrugated roll, pressure roll surface pollution, wear or not parallel; Corrugated surface board pressure is not uniform; Corrugated roller temperature is not enough; Corrugated roller pressure bearing wear; The guide board bracket is not parallel.
Post time: Jul-21-2021