Winding Device Pneumatic Suction Cup Spool Alignment
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Solution Overview
Problem
Cardboard spools with uneven side walls often cause the strip-shaped material to get caught during winding, leading to damage or machine downtime, as existing devices require ideal parallelism to function properly.
Innovation Solution
A device with two rotating bodies and pneumatic suction cups that can adjust and hold the side walls of the spool to maintain parallelism and facilitate winding, allowing for fully automatic operation even with uneven spools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cardboard spools with uneven side walls are used, then cost and weight are reduced, but the strip-shaped material gets caught during winding
Solution Approach 1:
The device changes the geometric parameters of the spool by using adjustable side wall holders that can modify the distance between side walls and their parallelism. This allows the system to compensate for manufacturing imperfections in cardboard spools, maintaining reliable winding operation while继续使用低成本的一次性纸卷
Solution Approach 2:
The side wall holders are designed with adjustable positions along the spool axis, allowing dynamic adaptation to different spool geometries. The holders can be moved to compensate for non-parallel side walls, transforming a static winding system into a dynamically adaptable one that maintains reliability across varying spool quality
2Device complexity
If manual spool changing is used, then device complexity is reduced, but productivity decreases
Solution Approach 1:
The device prepares the winding process in advance by using side wall holders to pre-adjust and secure the spool geometry before material feeding begins. This preliminary positioning ensures that even with manual spool changes, the winding process can start immediately at high speed without adjustment delays
Solution Approach 2:
The side wall holders automatically maintain spool alignment and parallelism during operation without requiring manual intervention. This self-adjusting mechanism allows the system to maintain high productivity while keeping the spool changing process simple, as the holders compensate for any misalignment automatically
3Ease of manufacture
If side wall parallelism is not maintained, then spool manufacturing is easier, but material feeding becomes problematic
Solution Approach 1:
The side wall holders act as intermediary elements between the spool and the winding mechanism. They mediate the interaction by providing a stable reference geometry that compensates for spool manufacturing imperfections, ensuring smooth material feeding even when the spool side walls are non-parallel
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
Enables continuous, high-speed automatic winding without manual intervention by ensuring the strip-shaped material is not caught, as the pneumatic suction cups maintain the necessary alignment and tension on the spool side walls.
Implementation Method 1
At least one of the two rotating bodies - preferably both - carries retaining elements for pulling one side wall of the coil, each retaining element having a holding side that is movable relative to the rotating body. By means of the holding elements, preferably designed as pneumatic suction cups, at least one side wall of a spool, preferably both side walls, can be drawn from the outside into a defined position.
Data Source
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AI summary
A device for winding strip-shaped material onto spools is described. This device comprises at least one first rotating body (10a, 10b) rotatable about a spool axis (S) and at least one second rotating body (20) rotatable about the spool axis (S), which is axially movable with respect to the spool axis (S) from a first end position to a second end position. In the first end position, the second rotating body (20) is closer to the first rotating body (10a, 10b) than in the second end position. The two rotating bodies (10a, 10b; 20) can be set into rotation about the spool axis together, at least when the second rotating body (20) is in its first end position.In order to ensure trouble-free operation even when the coils used are cardboard coils with not completely flat side walls, at least one rotating body (10a, 10b ; 20) carries at least one holding element, in particular in the form of a pneumatic suction cup (32) for pulling a side wall (54) of a coil (50, 50'), for which purpose the holding element has a holding side whose relative position to the rotating body (10a, 10b ; 20) is changeable.