Paper Core Making Manufacturing Plant Cost In Africa

The paperboard tubes making machine is a sophisticated piece of industrial equipment that efficiently transforms flat paper into strong,

versatile cylindrical products essential for countless industries.

The Core Manufacturing Process (Step-by-Step)

The process can be broken down into the following key stages:

1. Unwinding (De-reeling): Large rolls of paperboard (the "parent rolls") are mounted on an unwinding stand. Multiple rolls (often 2-4) are used simultaneously to build up the wall thickness of the tube.

2. Gluing: As the paper is fed into the machine, it passes through a precision gluing unit. This applies a controlled amount of adhesive (typically PVA or dextrin-based glue) to one side of the paper web. The glue is what binds the layers together.

3. Spiral Winding (The Heart of the Process):

   • The glued paper strips are fed at a specific angle onto a rotating central mandrel (a solid steel rod that defines the tube's inner diameter).

   • As the mandrel rotates, it pulls the paper and winds it around itself, creating a continuous, spirally-wound tube.

   • The angle of the paper feed determines the spiral angle of the paper fibers in the final product, which affects its strength and flexibility.

4. Forming and Pressure: The wound paper passes through a forming belt or rollers that apply consistent pressure, ensuring the layers bond tightly and securely without air pockets.

5. Cutting: Once the tube reaches the desired length, a cutting mechanism (often a rotary saw or a guillotine cutter) slices it precisely. The cutting can be triggered by a pre-set length counter or a sensor.

6. Ejection and Drying: The cut tubes are ejected from the mandrel. They are then conveyed through a drying oven or left to air-cure, allowing the adhesive to fully set and achieve maximum strength.

Key Components of the Machine

• Unwind Stand: Holds the large paper rolls with tension control for smooth feeding.

• Gluing System: Includes a glue tank, rollers, and applicators for even adhesive distribution.

• Mandrel: The core of the machine; its diameter defines the tube's inner diameter. Mandrels are interchangeable to produce different tube

  sizes.

• Forming Belt/System: A set of belts or rollers that apply pressure to the wound paper to ensure a tight bond.

• Cutting Unit: A high-speed saw or cutter that slices the continuous tube into specific lengths.

• Control Panel (PLC): The brain of the machine. A Programmable Logic Controller allows operators to set parameters like tube length,

  wall thickness, production speed, and cutting frequency.

• Drying/Curing System: Can be integrated (hot air ovens, IR dryers) or a separate area for the tubes to cure.

Types of Paperboard Tube Machines

There are two primary winding technologies:

1. Spiral Winding Machines:

   • How it works: Paper is fed at an angle onto a rotating mandrel.

   • Characteristics:

     • Can produce very long tubes.

     • Tubes have excellent flexibility and crush resistance.

     • Ideal for tubes where flexibility is key (e.g., postal tubes, concrete casting forms).

   • Common Uses: Mailing tubes, fabric rolls, paper cores for films and foils, construction forms.

2. Parallel Winding Machines (aka Convolute Winding):

   • How it works: Paper is fed straight onto a mandrel, winding in the same direction with no spiral angle.

   • Characteristics:

     • Produces tubes with very straight, clean edges.

     • Excellent for high-speed, high-volume production of shorter tubes.

     • Tubes have high rigidity and compressive strength.

   • Common Uses: Cores for paper towels, toilet tissue, adhesive tapes, cans and composite containers, high-strength industrial cores.

Applications of the Tubes Produced

The tubes and cores made by these machines are ubiquitous in industrial and consumer packaging:

• Industrial Cores: For winding materials like plastic film, foil, textiles, labels, and carpet.

• Paper Product Cores: The center tube for toilet paper, paper towels, and wrapping paper.

• Packaging: Mailing and shipping tubes, packaging for posters, maps, and blueprints.

• Construction: Sonotubes® for concrete pillars and columns.

• Consumer Goods: Cores for adhesive tapes, food containers (like Pringles cans), and gift wrap.