Tissue Toilet Paper Roll Rewinding Cutting Packing Machine

What is a Toilet Paper Converting Machine?

A Toilet Paper Converting Machine is an integrated production line that automates the process of taking jumbo rolls (or "parent rolls") of already-manufactured tissue paper and converting them into consumer-ready, perforated, and often wrapped toilet paper rolls.

This machine handles the processes of rewinding, perforating, cutting, and packaging.

Core Components and Their Functions

The machine is a series of connected modules, each performing a specific task.

1. Unwind Stand

• Function: Holds one or more jumbo rolls (typically up to 1.5 meters in diameter).

• Key Feature: Equipped with a tension control system (pneumatic or electronic) to ensure the paper web feeds smoothly and consistently without stretching or breaking. Some advanced models have an automatic splice unit to seamlessly join a new jumbo roll when the old one runs out, allowing for non-stop production.

2. Embossing Unit

• Function: Presses a pattern into the paper.

• Process: Used primarily for 2-ply production. Two plies of paper pass between a matched set of steel rollers (one male, one female) that imprint a design.

• Purpose: Improves softness, bulk, aesthetics, and ply bonding. It also creates air pockets for better absorbency.

3. Gluing Unit

• Function: Applies adhesive between the two plies after embossing.

• Purpose: To bond the two plies together so they don't separate during use or rewinding. It applies a fine, patterned glue line to maintain softness.

4. Perforation Unit

• Function: Creates the micro-perforated tear lines between sheets.

• Component: A precision steel roller with protruding blades that works against a rubber anvil roller. The spacing determines the final sheet count.

5. Rewinding Machine (The Heart of the Line)

• Function: Winds the embossed, glued, and perforated paper onto cardboard cores at high speed.

• Key Feature: Uses a drum rewinding system. The paper is wound onto cores that are pressed against a large, driven drum. This ensures tight, uniform, and firm rolls. Modern machines have multiple rewind shafts for continuous operation: while one set of logs is being wound, the finished set is ejected for cutting.

6. Log Saw (Cutting Machine)

• Function: Cuts the long, continuous "logs" of wound paper into individual consumer-sized rolls.

• Component: A high-speed circular saw or band saw with automatic positioning that moves to cut the log at pre-set lengths (determining the roll height/width).

7. Packaging Section

• Function: Wraps the individual rolls.

• Process:

  • Automatic Wrapper: Feeds each roll into a sleeve of plastic (e.g., Polyethylene) or paper wrap.

  • Heat Sealing Unit: Creates a tight, neat seal on the ends of the wrap.

  • Output Conveyor: Transports the wrapped rolls to a collection area.

The Step-by-Step Converting Process

1. Loading: A jumbo roll is mounted on the unwind stand, and cardboard cores are loaded onto the rewind shafts.

2. Web Threading: The paper web is threaded through the embossing, gluing, and perforation units, and attached to the core on the rewind shaft.

3. Rewinding & Processing: The machine starts. The paper is embossed, glued (if 2-ply), perforated, and wound into a long log around the core.

4. Log Ejection & Cutting: Once the log reaches the pre-set diameter, it is automatically ejected and transferred to the log saw, which cuts it into individual rolls.

5. Wrapping & Sealing: The individual rolls are fed into the wrapping machine, enclosed in film, and the ends are heat-sealed.

6. Output: The finished, wrapped rolls are discharged onto a conveyor for manual or automatic collection and secondary packaging into multi-packs or cases.

Types of Converting Machines

• Fully Automatic: The entire process from unwinding to output of wrapped rolls is automated. Requires minimal operator intervention.

• Semi-Automatic: Certain steps, like core loading, log transfer, or packing, may require manual operation. More affordable but slower and more labor-intensive.

• High-Speed vs. Standard-Speed: Production rates can range from 50-60 rolls per minute (RPM) for smaller machines to over 150 RPM for large industrial lines.