Rewinding Machine

The working process of a rewinding machine usually follows the pattern of "unwinding → processing → rewinding" :

1. Unwinding section: Install the large-sized master reel on the unwinding reel. The unwinding tension is controlled by devices such as magnetic powder clutches and variable frequency motors to ensure the smooth unfolding of the material.

2. Traction processing section: Materials pass through a series of guide rollers and key processing units. Stretch roller: Flatten the material and eliminate wrinkles.

Infinite tension detection roller: Real-time monitoring and feedback of material tension.

Slitting device: Uses circular blades (upper and lower type or razor type) or shearing knives to precisely slitt materials according to the preset width.

Inspection System (optional) : The visual inspection system can automatically identify and mark defects on the material surface.

Embossing/Coating unit (optional) : Embossing or surface coating treatment can be carried out at this station as required.

3. Winding Section: This is the core of the rewinding machine. The multiple pieces of material after cutting are respectively wound onto their respective winding reels. Modern rewinding machines typically adopt:

Central winding: The winding reel rotates actively for winding.

Surface winding: The material is pressed onto a large-diameter drive roller (" back roller ") and wound by friction, which can better control the hardness of the roll material.

Pressure roller device: Provides pressure at the initial stage of winding to help form a tight core.

4. Unloading section: When the coil material reaches the preset diameter or length, the material is automatically cut off, and the finished coil is automatically pushed out or lifted down, ready to enter the next process.

Techincal