Coreless Scroll Rewinding Machine Pneumatic Suction System
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Solution Overview
Problem
Conventional coreless paper roll rewinding machines rely on a winding assisting plate for starting the winding process, leading to unstable force application, uneven tightness, increased structural complexity, and surface indentations on the paper roll, affecting the quality and appearance of the finished product.
Innovation Solution
A coreless paper roll rewinding machine design that eliminates the need for a winding assisting plate by using parallel rewinding rollers with air flow channels and suction holes on the lower roller, creating a suction force to initiate winding without changing the roller gap, ensuring stable force application and even tightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a winding assisting plate is used to support the paper roll at the preliminary stage of rewinding, then the start of winding can be achieved, but the force applied on the paper roll becomes uneven causing core portion wrinkling
Solution Approach 1:
The patent replaces the mechanical winding assisting plate with a pneumatic suction system. The suction system uses negative pressure generated by a vacuum pump to hold and advance the paper roll, eliminating the mechanical contact that caused uneven force distribution and core portion wrinkling.
Solution Approach 2:
The patent employs pneumatic principles by using a vacuum pump connected to suction holes on the lower roller to create negative pressure. This pneumatic field uniformly distributes the holding force across the paper roll surface, avoiding the localized pressure points that caused wrinkling with mechanical plates.
2Ease of operation
If the roller gap is changed during the process from start of winding to rewinding, then the winding can be initiated, but the force applied on the paper roll becomes unstable
Solution Approach 1:
The patent replaces the mechanical roller gap adjustment system with a pneumatic suction system. The suction force, controlled by vacuum pressure rather than mechanical gap changes, provides stable and continuous force application throughout the winding process, eliminating the instability caused by gap transitions.
3Measurement precision
If the rewinding lower roller moves while rotating at high speed to control distance, then the winding position can be controlled, but the structural complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces the complex mechanical movement and positioning system with a pneumatic suction system. The suction force naturally follows the rotating lower roller without requiring additional movement mechanisms, simplifying the structure while maintaining precise control through vacuum pressure regulation.
4Ease of operation
If a winding assisting plate with comb shape is used and inserted into a ring groove, then the winding can be initiated, but significant indentations are left on the surface of the paper roll
Solution Approach 1:
The patent replaces the mechanical comb-shaped assisting plate that physically indented the paper with a pneumatic suction system. The suction force holds the paper without mechanical contact or grooves, completely eliminating surface indentations while maintaining the ability to initiate winding.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides stable and even force application during rewinding, prevents core portion wrinkling, reduces structural complexity and manufacturing costs, and improves the appearance of the paper roll by eliminating surface indentations.
Implementation Method 1
When the air suction holes on the surface of the rewinding lower roller are gradually closing toward the roller gap between the rewinding upper roller and the rewinding lower roller, they will create a suction force, which rolls up the head portion of the paper
Data Source
Figure 1~2
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AI summary
A coreless scroll rewinding machine without a winding assisting plate comprises an upper rewinding roller (1) and a lower rewinding roller (2) that are parallel with each other. Paper (3) is wound on the upper rewinding roller (1) and passes through a gap between the upper and the lower rewinding roller (1, 2). Multiple airflow channels (4) are formed in a roller body of the lower rewinding roller (2), and each of the airflow channels (4) is communicated with a group of air entry ports (5) on a surface of the roller body. An suction cover (6) provided with a suction port is arranged near an end of the lower rewinding roller (2). When one group of air entry ports (5) on the surface of the lower rewinding roller (2) is adjacent to the gap between the rollers, the airflow channel (4) communicated with the group of air entry ports is rotated to an area communicated with the suction port of the suction cover (6). When the group of air entry ports (5) is far away from the gap between the rollers, the corresponding airflow channel (4) is rotated to an area deviated from the suction port. This coreless scroll rewinding machine has high winding reliability, stable rewinding function and uniform scroll compactness, and can prevent the indentation on the surface of the scroll.