Mandrel Cupping Assembly Cam Track Actuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional web rewinding machines face issues with mandrel vibration and wobble during loading and unloading, leading to inefficient core attachment and potential damage to the chuck arm mechanism, requiring complex and numerous moving parts for operation.
Innovation Solution
A simplified mandrel cupping assembly with a hold-open and hold-closed cam track system, utilizing a single actuator to rotate cupping arms independently, allowing for reliable engagement and disengagement of mandrel cups, reducing complexity and maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mandrel support mechanisms are used with multiple moving parts, then the mandrels can be supported during winding, but the complexity of the device increases and maintenance needs increase
Solution Approach 1:
The mandrel support system is segmented into discrete cupping arms, each independently controllable. Each cupping arm can be individually engaged or disengaged from its associated mandrel, allowing selective support where needed rather than requiring a complex continuous support mechanism throughout the entire mandrel length
Solution Approach 2:
The cupping arms are made dynamically controllable through actuators that can engage or disengage them from the mandrels based on operational requirements. During winding operations, the cupping arms are engaged to provide support; during loading and unloading operations, they are disengaged to allow free access to the mandrel ends
2Stability of the object's composition
If chuck arms are engaged with mandrels during loading and unloading, then mandrel stability is improved, but the ability to load and unload cores efficiently is reduced
Solution Approach 1:
The cupping arms are designed with dynamic engagement and disengagement capabilities through actuators. During loading and unloading operations, the cupping arms are disengaged from the mandrels to allow free axial movement of cores. During winding operations, the cupping arms are engaged to provide mandrel support and stability
Solution Approach 2:
The cupping arms undergo periodic engagement and disengagement cycles synchronized with the operational phases of the mandrel. They are disengaged during loading/unloading phases and engaged during winding phases, creating a rhythmic pattern that matches the operational requirements
3Reliability
If complex mandrel cupping mechanisms are used, then mandrel support is reliable, but the risk of mechanism damage increases
Solution Approach 1:
The support mechanism is divided into separate, modular cupping arms that can be independently controlled. This segmentation reduces the complexity of any single mechanism and allows individual arms to be engaged or disengaged based on operational needs, reducing the risk of damage to the entire system
Solution Approach 2:
The actuators that control the cupping arms are positioned and configured to ensure smooth engagement and disengagement before critical operations begin. This preliminary positioning prevents sudden impacts or forced engagements that could damage the mechanism
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 enhances the stability of mandrel ends during operation, facilitating easier core loading and unloading, reducing the risk of damage and improving overall machine efficiency with fewer moving parts, allowing for higher turn-over rates and reduced maintenance costs.
Implementation Method 1
A simplified mandrel cupping assembly with a hold-open and hold-closed cam track system, utilizing a single actuator to rotate cupping arms independently
Data Source
AI summary
A web rewinding apparatus comprising a turret winder and a mandrel cupping assembly is disclosed. The turret winder has a rotatably driven turret supporting a plurality of rotatably driven mandrels capable of engaging cores upon which a web material is convolutely wound thereabout. The mandrel cupping assembly has a plurality of cupping arms each cooperatively associated with one of the plurality of mandrels and having a mandrel cup for releaseably engaging the unsupported ends of the cooperatively associated mandrel. The mandrel cupping assembly has a cupping arm support having a hold-open cam track and a hold-closed cam track. Each cupping arm is carried in a radial path while disposed in either of the hold-open cam track or said hold-closed cam track. A first actuator disposes the cupping arm from the hold-open cam track to the hold-closed cam track.