1、 Working principle

The working principle of the wrapping machine is mainly based on the coordinated motion of the turntable rotation and the mold frame lifting. The specific steps are as follows:

1. Cargo positioningPlace the wrapped object in the center of the turntable.
2. turntable rotationStart the turntable motor to drive the turntable to rotate, so that the object can be wrapped and wrapped around the periphery.
3. Mold frame liftingAt the same time, the elevator motor starts, driving the winding and bundling unit to move up and down together, achieving the winding of objects in the height direction.
4. packing completedBy coordinating the movement of the turntable and the mold frame, the entire surface of the object is wrapped and packaged.

2、 Classification

Wrapping machines can be classified into various types according to different classification criteria:

1. According to the degree to which the packaging is wrapped：

   • Full wrap wrapping machine: including twisting type, covering type, body fitting type, seam type, etc.
   • Half wrap wrapping machine: only partially wraps the packaging.

2. According to the structure：

   • Tray winding machine: suitable for packaging goods shipped on pallets, such as container transportation of bulk goods and packaging of loose pallets.
   • Tray free winding machine: It can wrap and package goods without pallets.
   • Horizontal wrapping machine: It uses a rotating arm system to rotate around goods moving at a constant speed horizontally, achieving wrapping and packaging.
   • Cantilever winding machine: It uses a rotatable cantilever to wrap and wrap goods around them.
   • Circular winding machine: A film (belt) feeding device that runs around a circular track to wrap and wrap the ring part of circular goods.
   • Drum winding machine: It uses two power rollers on the turntable to drive the drum shaped cargo to rotate and wrap the radial cylindrical surface.
   • Steel strip winding machine: using steel strip as packaging material to wrap and package goods.

3. According to the degree of mechanical automation：

   • Fully automatic winding machine: achieving automated operation without the need for manual intervention.
   • Semi automatic winding machine: Some operations require manual participation, such as placing goods, starting equipment, etc.
   • Manual winding machine: relying on manual operation, suitable for small batch, low efficiency packaging needs.

4. According to the membrane frame structure form：

   • Pre stretch winding machine: By setting the stretch ratio, the film is uniformly wrapped, which has the characteristic of high utilization rate of consumables.
   • Resistance stretch winding machine: adapts to different film materials by adjusting friction damping, but lacks stability for light and high goods.
   • Mechanical pre stretching winding machine: Combining mechanical structure to achieve pre stretching of film.

3、 Advantages and Characteristics

1. AdaptableNot limited by the size of the packaging object, it can wrap and package goods of various shapes and sizes.
2. Good packaging effectIt can prevent dust, moisture, and clean packaging materials, reduce surface scratches, and improve surface quality.
3. efficient and low-consumptionAdopting PLC automatic control, the performance is reliable, and the winding method and frequency can be changed as needed to improve packaging efficiency and reduce packaging costs.
4. safe and reliableIt has overload, overcurrent and other protection functions to ensure the safe operation of the equipment.
5. easy maintenanceThe design is concise and easy to maintain.

4、 Application scenarios

Wrapping machines are widely used for containerized packaging of products such as foreign trade exports, food and beverage, irrigation, papermaking, dyes, plastic chemicals, glass ceramics, and electromechanical castings. Specific application scenarios include:

1. logistics warehousingWrap and package the goods for easy storage, transportation, and mechanized loading and unloading.
2. Product processingWrap and package the processed products to protect their surface quality and increase their added value.
3. automatic production lineUsed in conjunction with automated production lines to achieve automated packaging and transportation of goods.