Taking the AF-3 fully automatic stretch wrapping machine as an example, its product design primarily comprises several core systems: the control system, turntable system, film carriage system, and top-pressing device. The control system utilizes programmable logic control, allowing users to directly configure parameters-such as the number of top and bottom wrapping layers, wrapping cycles, top-overrun time, and reinforcement layers (0–9)-via the control panel. It is equipped with a photoelectric sensor to automatically detect cargo height, employs highly reliable electrical control components, and supports seamless switching between automatic and manual modes at any time. The turntable system features variable frequency speed control, offering an adjustable rotation speed range of 0–12 rpm; it automatically returns to its home position upon the completion of the wrapping cycle. The turntable itself is constructed from high-durability, wear-resistant solid steel. The film carriage system incorporates a powered pre-stretch mechanism capable of achieving a pre-stretch ratio of up to 250%, thereby minimizing film consumption. The film feeding speed is adjustable and controlled by a dedicated DC motor, while the ascent and descent speeds of the film carriage can be adjusted independently. Constructed from solid cast aluminum, the film carriage is both lightweight and stable; it utilizes wear-resistant rubber rollers to ensure a long service life, and its lifting column features a dual-chain structure to guarantee smooth and reliable operation. The top-pressing device employs a linear guide rail structure supported by a dual-column lifting mechanism; it exerts a pressing force of 20 kg with an air consumption rate of 1000 ml/min.
In recent years, the product design of fully automatic stretch wrapping machines has continued to evolve through constant innovation. A notable design advancement involves integrating hydraulically actuated support rollers within the rotating turntable. This feature allows for the convenient adjustment of the support surface's contour, thereby enabling the machine to accommodate the wrapping requirements of cargo with diverse base shapes-ranging from flat bottoms to curved bottoms-and significantly enhancing the equipment's overall versatility.
