Corrugated board quality terminology
1) Dimensional error: The size exceeds the error range specified by the customer or the national standard.
2) High and low 楞: Corrugated paper has high fluctuations, and the thickness of the cardboard is uneven, and the difference is out of tolerance.
3) Surface wrinkles: Creases on the surface of corrugated cardboard that can cause printing defects.
4) Collapse: Corrugated is crushed by external force.
5) The bonding is not strong: the bonding strength is not up to the requirement, and the layers of the corrugated board are easy to open due to the weak bonding.
6) Insufficient quantification: The total amount of cardboard is less than the specified standard.
7) Insufficient hardness: If the water content of the cardboard is too large or the physical properties of the raw materials are low, the flat compressive strength and the edge compressive strength of the corrugated cardboard are low.
8) De-pitting: also called pseudo-sticking, the finger paper and the paper paper are not really bonded, which means that the two can be easily separated, and the paper layer is not damaged after separation.
9) Skew: The pressure line or the beer line is not parallel or perpendicular to the pit pattern. The skew of the large box does not exceed 3 楞, and the skew of the small box does not exceed 2 楞.
10) Missing material: The cardboard paper of the corrugated box exceeds the corrugated paper.
11) Dew (pit): Corrugated cardboard has more corrugated paper than cardboard.
12) Warpage: In the production of corrugated board, the change of moisture content of the base paper, improper operation and environmental changes may cause unevenness of the produced paperboard.
13) Seesaw phenomenon: It refers to the corrugated board after it is made. It has a concave phenomenon on the surface paper along the top of the peak and the back of the peak. The shape is like a household washboard.
14) Foaming: The corrugated board partially fails to conform to the paper and corrugated paper.
15) Shallow indentation: When the corrugated board is pressed horizontally, the pressure line is too shallow due to the pressure being too small, which makes it difficult to bend the flap.
16) Cardboard blasting line: When the corrugated cardboard after pressing the line is bent, the pressure line is cracked. The main reason is that the cardboard is too dry, the surface/back paper is poor in folding resistance, and the pressure line is improperly operated.
Corrugated board equipment terminology
1) Base paper support: The base paper support is used to load the roll paper, so that the paper roll can be easily and smoothly bonded to the corrugated board by the corrugating roller and the cardboard paper under the action of the pulling force. The structure of the base paper support is relatively simple, and it mainly includes a frame, a lifting device, a tension control device, a clutch, a paper web deviation correction, and a loading and unloading paper roll.
2) Preheater: Also called preheating roller, it is an important part of single-sided machine. It preheats the base paper before entering the corrugating roller, making it easy to form and bond.
3) Corrugated machine: It is also called a pit machine. The corrugated paper is pressed into corrugated paper and attached to the surface and inner paper. The equipment is mainly composed of upper and lower corrugating rollers, heating device, adjusting system, anti-rolling paper guide claw and the like. Pre-regulator: It can heat corrugated paper or base paper, and it can also spray steam to adjust the moisture of the paper.
4) Corrugating Roller: The corrugating roll is a “mold†for corrugating. It is a key component on a single-sided machine. It consists of upper and lower corrugating rolls. Generally, the position of the lower corrugating roller is fixed, and the upper corrugating roller applies a certain pressure to the lower corrugating roller by spring, air pressure or oil pressure.
5) Pressure roller: Apply the paper and the coated corrugated paper to a pressure of 0.4-0.5 MPa so that they are firmly attached together to form a single-faced corrugated.
6) Paper guide: Because the corrugated base paper passes through the corrugating roller, the corrugated base paper is separated from the corrugating roller due to the centrifugal action of the high speed operation of the corrugating roller. In order for the corrugated paper to be neither opened nor in a good fit with the corrugating roller, the paper guide is required.
7) Vacuum adsorption device: Its function is to replace the paper guide plate, so that the corrugated paper is completely attached to the lower corrugating roller, so that the corrugated peak can obtain a uniform amount of sizing, which is more conducive to improving the quality of the corrugated cardboard.
8) Transport bridge: also known as flyover. Its function is to match the single-sided cardboard produced by each single-sided machine and to make initial curing of single-sided cardboard.
9) Paper feeding trolley: The original paper is moved from the outside of the production site to the in-plant transportation equipment at the original paper support.
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