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中文简体As a key equipment for nonwoven fabric production, the core function of the air-lay machine is to uniformly web a variety of fiber materials through airflow power. Fibers with different properties, such as recycled fibers, man-made fibers, and hot-melt fibers, need to be pre-treated before entering the equipment. Recycled fibers need to be fully opened to eliminate fiber aggregation; man-made fibers can directly enter the mixing stage due to their stable physical properties; hot-melt fibers need to be mixed with other fibers in a specific proportion because they can play a bonding role after being heated and melted. These fibers complete the initial fusion in the feeding system of the air-lay machine, and through the entrainment and dispersion of the airflow, break through the restrictions of traditional mechanical web formation on fiber types, and achieve the coordinated web formation of fibers of different lengths, finenesses, and materials.
Process characteristics of non-adjustable air-laying
For fully opened man-made fibers, cloth-opened fibers, hemp fibers and other raw materials, the air-lay machine can adopt an air-laying mode that does not require adjustment. This feature stems from the precise adaptation of the equipment to the fiber state. The core of no need for adjustment lies in the built-in fiber state monitoring module of the equipment, which can sense the fiber flow characteristics in real time, meet the web forming requirements by fixing the airflow parameters, reduce manual intervention links, and avoid production fluctuations caused by frequent adjustments. This process is particularly suitable for scenes with moderate requirements for web uniformity and sufficient fiber pretreatment, while ensuring production efficiency and reducing the complexity of equipment operation.
Fiber pretreatment and equipment coordination mechanism
The efficient operation of the air-lay machine depends on the close cooperation between the front-end fiber pretreatment and the equipment process. Due to the complex source of regenerated fibers, they need to go through pretreatment processes such as opening and impurity removal to ensure that there are no hard impurities and the fiber monofilaments are separated when entering the equipment; although artificial fibers do not require complex treatment, their moisture content needs to be controlled to avoid fiber agglomeration due to excessive humidity; natural fibers such as hemp fibers need to remove impurities such as lignin to reduce blockage of the airflow channel. The feeding system of the equipment is equipped with a grading and screening device, which can further remove residual impurities after pretreatment, and at the same time, different fibers are fully mixed in the conveying pipeline through airflow stirring.
The influence of core components on web quality
The web quality of the air-lay machine is determined by multiple core components. The diameter of the air conveying pipeline should be designed to match the fiber length to avoid fiber entanglement or air flow dispersion caused by too thin pipeline; the running speed of the web curtain and the air flow settling speed should maintain a dynamic balance to ensure that the fibers are evenly spread on the curtain surface; the negative pressure control of the suction device directly affects the fiber settling density. Too much negative pressure will cause the fibers to pile up too densely, while too little negative pressure will make the net structure loose. The fiber distribution box of the equipment evenly distributes the mixed fibers through a multi-channel design to avoid excessive local fiber concentration, and the angle adjustment of the guide plate can guide the air flow direction and further optimize the distribution of fibers in the web forming area.
Stability control strategy in equipment operation
The continuous and stable operation of the air-lay machine needs to be achieved through multiple control strategies. The fiber flow monitoring system equipped with the equipment can sense the changes in feed volume in real time and maintain the stability of fiber delivery by adjusting the feed speed; the air pressure feedback device can automatically adjust the air flow pressure according to the fiber type to ensure that fibers of different densities can be effectively transported; the net thickness monitoring module uses non-contact measurement to adjust the web curtain speed in real time to ensure the consistency of product thickness. The self-cleaning function of the equipment can regularly clean the residual fibers in the air flow channel to prevent the pipeline from being blocked due to long-term operation, while the condition monitoring system of key components can give early warning of potential failures and reduce downtime for maintenance. The comprehensive application of these control strategies enables the equipment to maintain production continuity and stabilize product quality when processing multi-fiber mixed raw materials.
