Uneven corrugation height, irregular shape of the glue, indicates the unevenness of the corrugated cardboard. The most common reason for the uneven corrugated cardboard the single facer is the inaccurate position of the core paper when passing through various rollers. This article analyzes the causes of the defects and aims to provide a reference guide for corrugating line operators when solving the problem of uneven corrugated cardboard.
Core paper Reason
1. The core paper is too wet or too dry; 2. The core paper roll is not round or is loose; 3. The core paper is rough or there are other processing quality issues related to the core paper.
Measures
1. Adjust the preprocessor's blade angle or steam spraying device; 2. If necessary, replace the core paper roll; 3. Try using another type of core paper from the same supplier. If the problem is related to the quality of the core paper, seek technical consultation assistance from the core paper supplier.
II. Corrugated Paper Reason
1. There is dirt on the corrugated roller; 2. The bearing is worn out; 3. The surface of the corrugated roller is rough or damaged; 4. The corrugated roller vibrates when operating at the critical speed.
Measures
2. Clean the dirt off the corrugating rollers; 2. Inspect the condition of the bearings and replace them if necessary; 3. Smooth the rough surface of the corrugating rollers or replace them; 4. Check the adjustment status of the corrugating rollers and ensure that the machine operates at a speed higher or lower than the critical point.
Three.
Single-facer without guide claws Reason
Vacuum or pressure chamber pressure is insufficient; The vacuum hole is blocked; 3. The process of bonding the corrugated core paper and the surface paper is not smooth.
Measures
1. Refer to the manufacturer's product manual to determine the appropriate vacuum level or pressure degree, and make adjustments or repairs as necessary; Inspect and remove dirt; 3. Check the settings of the vacuum valve and the vacuum level at both ends of the lower corrugated roller, and inspect the gap between the vacuum box baffles