Aerosol Component Buffer Station with Pneumatic Sheet Support
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Solution Overview
Problem
Aerosol generating article production machines face challenges in handling fragile and sticky sheet materials, such as Tobacco Cast Leaf, which are prone to damage due to their weight and require high force to unwind, necessitating a buffer system that minimizes material stress and damage.
Innovation Solution
A machine with a buffer station featuring fixed and movable sheet guides that define a zig-zag trajectory, supported by an air system with sucking and blowing actions to reduce friction and stress on the sheet, and temperature control to manage material handling and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sheet material is supported by mechanical contact with rollers, then the sheet can be transported and buffered, but the weight of the material causes stress and potential damage to the fragile sheet
Solution Approach 1:
The patent employs a pneumatic support system where air cushions are generated between the sheet material and the support surface. This allows the sheet to be supported and transported without direct mechanical contact, eliminating stress concentrations and damage risks associated with roller contact, while still enabling effective weight support and positioning.
2Productivity
If movable rollers are used to create a buffer of sheet, then continuous production can be maintained during input unit replacement, but the sheet experiences friction and stress that can cause damage
Solution Approach 1:
The buffer system utilizes pneumatic cushions to support the sheet during transportation and storage in the buffer zone. This eliminates friction between the sheet and mechanical rollers, allowing the sheet to be moved and buffered without the harmful friction and stress that would otherwise occur with conventional roller-based buffering systems.
Solution Approach 2:
The buffer system is designed to be dynamically adjustable, allowing the buffer zone length to be modified based on production requirements. The pneumatic support system can adapt to different sheet positions and buffer configurations, maintaining optimal support conditions throughout the dynamic buffering process.
3Speed
If high force is applied to unwind the sticky TCL material, then the material can be fed into the machine, but the fragile material is likely to be torn apart
Solution Approach 1:
The pneumatic support system provides distributed support across the entire sheet surface during unwinding and transportation. This eliminates the need for high localized forces that would be required with mechanical grippers or rollers, allowing the sheet to be unwound and transported at appropriate speeds without exceeding its tensile strength limits.
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 effectively reduces material stress and damage by distributing weight and minimizing friction, allowing for continuous production without interrupting the processing of aerosol generating articles, particularly suitable for fragile and sticky sheets like homogenized tobacco material.
Implementation Method 1
a sucking action by the air system is exerted to attract the sheet towards the outer surface
Implementation Method 2
a blowing action by the air system is exerted to push the sheet away from the outer surface
Data Source
AI summary
The present invention relates to a machine for the production of a component for an aerosol generating article, the machine including: —a buffer station, the buffer station including: # fixed sheet guides; # movable sheet guides which are movable in a reciprocating manner in a direction towards the fixed sheet guides and in a direction away from the sheet fixed guides; # an actuator for moving the movable sheet guides, wherein the fixed and movable sheet guides together define a zig-zag trajectory for the sheet having a variable length for varying the total length of the sheet of material in the buffer station; # supports for the sheet, the supports being arranged so that, when the movable sheet guides are moved towards the fixed sheet guides, at least one of the movable sheets guides is interposed between two different supports of the plurality; # an air system; # wherein the each of the supports defines an outer surface, at least one of the outer surfaces having a first portion in which a sucking action is exerted by the air system to attract the sheet towards the outer surface and a second portion in which a blowing action is exerted by the air system to push the sheet away from the outer surface.