The production process for five-layer corrugated cardboard involves the following steps:
Initially, five rolls of raw paper are positioned in a specific orientation on the paper holder. Each paper web undergoes preheating through a preheater to warm its surface, facilitating adhesion. Prior to being fed into the single-facer machine, the corrugated base paper passes through a preprocessor for moisture adjustment and width flattening.
Subsequently, the corrugated base paper is pressed in the single-facer machine, where adhesive is applied and bonded with the facer paper to form single-faced corrugated cardboard. Upon completion, the single-faced corrugated cardboard is conveyed by a lift conveyor to the overhead conveyor frame and then enters a triple preheater via a brake. Next, two types of single-faced corrugated cardboard are fed into the glue machine for additional gluing, with the inner layer paper undergoing preheating once more. Subsequently, these three types of corrugated cardboard enter the drying equipment of the double-backer unit together for adhesive drying. The cardboard undergoes thermal bonding and is then cooled to evaporate moisture.
After cooling on the conveyor belt, the cardboard is horizontally cut to specific specifications by a computer-controlled cross-cutter. It is then transported by the conveyor belt to the stacking machine for neat arrangement. The production of corrugated cardboard is a highly intricate process that necessitates substantial knowledge. Numerous factors must be taken into consideration during manufacturing. The production process demands the simultaneous presence of corrugating medium, temperature, adhesive, and speed. Any deviation in one of these aspects can lead to quality issues.