Single Machine Production Frequently Asked Questions

Single-sided machines are favored by small and medium-sized carton companies for their flexibility, ease of use, low price, and small footprint. However, some companies use corrugated cardboard for single-faced machines for a relatively short period of time, and the production equipment is complicated. Such problems often occur in the production process. This not only affects the quality of the product, but also wastes a large amount of raw materials. The single-sided machine is of great significance to guide the production of cartons and improve the quality of cartons. The following discussion on common quality problems and solutions in the production process of single-sided machines is held together with colleagues.

A large area of ​​open plastic

The adhesive coating line on the Corrugated peak was white, and the small particles of starch were gently rubbed off by hand, which was an indication that the adhesive was not sufficiently gelatinized. The reason for this is that the temperature of the heat roller has not reached the specified requirements, and the gelatinization temperature of the adhesive has not been reached. If the adhesive coating is found to be slightly sticky on the coating line, the reason is that the adhesion speed of the adhesive is not compatible with the vehicle speed and the viscosity of the adhesive.

These conditions are likely to occur when the paper is tight and the permeability is not strong, and the surface adsorption capacity and penetration force of the adhesive are not strong. The solution is to improve the adhesive, increase its penetration, or spray the adhesive surface of the paper, slow down the speed, and increase the paper preheating surface. Adhesive coating amount is too small will affect the adhesion, inspection can be coated with iodine adhesive coating line, according to the degree of blue to determine its coating, adjust the paste tray, increase the adhesive coating the amount.

Second, there have been one or several longitudinal plastic

The main reason for this problem is that the gap of the corresponding guide board of the opening line does not meet the requirements. The solution is to adjust the gap. When the gap between the paper guide and the lower corrugated fiber is too large, the corrugated paper does not abut against the corrugated roll, so that when the corrugated paper and the noodle paper are pressed at the pressure roll, the corrugation is flattened. At the same time, the gap between the paper guide plate and the lower corrugating roller is large, and in order to apply the glue, the rubber coating roller must be moved forward, and the lower part of the paper guide plate can be easily pushed, resulting in a corner mark of the lower corner of the paper board leaving a mark on the corrugated surface. Together. When the clearance is too small, the amount of glue applied affects the adhesion of the paper to the corrugated medium.

Third, facial paper wrinkles and collapse

Due to transportation, loading and unloading, and storage, webs are not circular. When the paper is conveyed to the single-sided machine, it is loose and tight, resulting in wrinkling and collapse of the tissue. The solution is to moderate the brakes. Another situation is that the moisture content of the paper is not uniform, resulting in inconsistent paper expansion and contraction, wrinkling and collapse of the paper, which can only be resolved by the carton company business personnel when purchasing.

Fourth, half of the adhesive half of the poor adhesion

The reason for this problem is that the gap between the pressure roller and the lower corrugating roller should be between 0.3-0.4mm. Normally installed machines are less likely to have gaps at both ends, and there is a greater possibility of inconsistent pressure. Therefore, the pressure should be adjusted first.

Fifth, erroneous

The common cause of the stumbling of squatting is due to the inaccurate positioning of the upper and lower corrugating rollers of the single-sided machine. The upper and lower corrugating rollers should be adjusted.

Sixth, the appearance of the paper and the corresponding rolling marks

Mild rolling is a normal phenomenon. When the pressure of the pressure roller is too high, the paper will be affected by the mechanical destructive force, deeper marks will appear, and even the edges will be slightly broken, which will seriously affect the quality of the corrugated board and reduce the strength of the carton. . The solution is to adjust the pressure roller pressure, pay attention to the combination of speed, paper thickness, paper quality and other factors.

Seven, edge open plastic

The reasons are as follows:

1. The cardboard is high in ration and the bonding speed is too fast;

2. The moisture content of the carton base paper is too low;

3 pressure roller adjustment is not reasonable;

4. Adhesive agglomerate, viscosity is not enough;

5. Adhesive coating is too large, causing paper edge peeling;

6. Edge paper guide adjustment is not reasonable.

Eight, cut off

The main reason is that the corrugating roll is not parallel and the clamping pressure is insufficient. The corrugating roll should be adjusted.

Nine, high and low

The reasons are corrugated roller, pressure roller surface contamination, wear or non-parallel; corrugated paperboard paperboard pressure is not uniform; corrugated roller temperature is not enough; corrugated roller pressure bearing wear; guide paperboard tray is not parallel.

Solution: For each of the above reasons, adjust the equipment accordingly and replace the parts.

There are some problems in the production of corrugated paperboards by single-sided machines that are not involved in the above, but as long as careful observation is made to analyze the causes of the corrugated paperboard, it is certain that solutions can be found.