Qingdao JIERUIXIN Machinery and Technology CO.,LTD. achieving automatic paper jointing during the paper coating process not only enhances production efficiency, reduces energy waste, and saves production costs but also alleviates labor intensity for operators and improves product quality.

Automatic jointing consists of unwinding jointing and rewinding jointing.

1.Automatic Unwinding Jointing

The automatic unwinding stand consists of a rotating arm and a transmission mechanism with a reducer. The rotating arm completes approximately one rotation every 1.5 minutes. At both ends of the rotating arm, there are A and B paper splicing stands equipped with a dual-position structure for power transmission without shafts.

Automatic unwinding jointing refers to swiftly joining another paper roll when one paper roll finishes coating, allowing the production process to continue uninterrupted and without deceleration, repeatedly coating without stopping. Generally, there is no need for a shutdown under normal circumstances.

The principle of automatic unwinding is as follows: Pre-apply double-sided tape on the B paper roll. When the A paper roll is about to finish coating, the rotating arm pre-accelerates the B paper roll to an appropriate position. As the linear speed approaches that of the A paper roll, a paper cutting knife, driven by a cylinder, continuously lifts the trailing edge of the A paper roll. When it moves to the B paper roll and instantaneously adheres to the double-sided tape on it, the paper cutting knife swiftly cuts the trailing edge of the A paper roll. The leading edge of the B paper roll is attached, initiating a new coating. The pre-acceleration of the B paper roll stops, entering normal operation. At this point, the paper core tube is removed from the A paper roll, a new roll is loaded, and the coating process repeats.

2.Automatic Rewinding Jointing

During the rewinding process, the A paper roll is adhered to the steel tube on the B paper roll with double-sided tape. As the A paper roll is about to complete winding, the B paper roll with the steel tube begins pre-acceleration. When the linear speed matches that of the A paper roll, the trailing edge of the A paper roll is cut off, and the joint of the B paper roll is stuck to the trailing edge of the A paper roll, initiating rewinding. The A paper roll is unloaded, a new steel tube is loaded, and the process is repeated to achieve continuous automatic jointing.

Additionally, the double-sided tape adhered to the B unwinding paper roll and the A rewinding paper roll steel tubes must be neat and flat to prevent paper tearing during jointing.

The key to successfully achieving automatic jointing in the paper coating process lies in effectively controlling the automatic unwinding and rewinding, ensuring that the jointing linear speeds of A and B paper rolls are synchronized. Additionally, the smoothness of the double-sided tape adhered to the B paper rolls in automatic unwinding and the steel tubes in automatic rewinding is crucial for the success of the jointing process.

Qingdao JIERUIXIN Industries Co., Ltd., specializes in paper coating industries and has been serving customers worldwide for decades. Our dedicated team of chemists designs exclusive formulas tailored to meet the unique needs of each client. With extensive experience in establishing paper coating machine lines and supplying chemicals, we are the preferred choice for companies in the paper coating industry seeking comprehensive support, ranging from paper and machinery to chemicals. We welcome inquiries and invite you to experience our excellent service and superior quality firsthand.