Casting Apparatus with Slidable Lid for Homogeneous Alkaloid Web
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Solution Overview
Problem
Existing casting methods for homogenized tobacco material result in inhomogeneities due to variations in slurry physical properties, leading to defects in the cast web, such as tearing and inconsistent aerosol delivery in aerosol-generating articles.
Innovation Solution
A casting apparatus with a slidable lid and movable support, where the slurry is cast using a casting blade, allowing precise control of pressure within the casting box to prevent 'dry slurry patches and ensure consistent web formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If standard casting methods are used to cast slurry onto a moving metal belt, then the casting process is simple and fast, but the cast web becomes inhomogeneous with defects such as tearing and dry slurry patches
Solution Approach 1:
The casting box is equipped with a movable support that can adjust its position dynamically, and a slidable lid that can move along the lateral walls. These dynamic components allow the system to adapt to variations in slurry properties and maintain homogeneous casting despite changes in slurry consistency, viscosity, or moisture content during the casting process.
Solution Approach 2:
The apparatus allows for controlled changes in pressure parameters within the casting box through the slidable lid mechanism. By adjusting the position of the lid and movable support, the pressure of the slurry can be controlled, preventing dry slurry patches and ensuring consistent web formation. This parameter control directly addresses the inhomogeneity caused by slurry variations.
2Manufacturing precision
If pressure control is not implemented in the casting box, then the casting apparatus is simple, but variations in slurry pressure lead to inhomogeneity and web defects
Solution Approach 1:
The slidable lid can move along the lateral walls of the casting box, and the movable support can adjust its position, creating a dynamic pressure control system. This allows the apparatus to maintain consistent slurry pressure even when slurry properties vary, preventing inhomogeneity and web defects while avoiding complex fixed pressure control mechanisms.
Solution Approach 2:
The movable support and slidable lid work together to automatically adjust and maintain appropriate pressure conditions within the casting box. The system self-regulates the pressure environment for homogeneous casting without requiring external complex pressure control systems, achieving consistent web formation through the interaction of its own components.
3Manufacturing precision
If a slidable lid and movable support are added to control pressure, then homogeneous cast web is achieved, but the casting apparatus becomes more complex
Solution Approach 1:
The casting box incorporates a movable support that can adjust its position and a slidable lid that moves along the lateral walls. These dynamic components provide the necessary pressure control for homogeneous casting while maintaining relative simplicity through their straightforward mechanical design and integration into the existing casting box structure.
Solution Approach 2:
The movable support and slidable lid serve multiple functions: they control slurry pressure for homogeneous casting, accommodate variations in slurry properties, prevent dry slurry patches, and work together to maintain consistent web formation. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in overall apparatus complexity.
Data Source
AI summary
The invention relates to a casting apparatus (100) to cast a web (1) of a material containing alkaloids, the casting apparatus (100) including: —a casting box (10) adapted to contain a slurry (2) to be cast to form the web (1) of a material containing alkaloids, the casting box (10) defining one or more lateral walls (11, 14); —a slidable lid (80) adapted to slide on the one or more lateral walls (12,14) of the casting box (10); —a movable support (20); and —a casting blade (70) adapted to cast the slurry (2) contained in the casting box (10) onto the movable support (20) so as to form the cast web (1). The invention also relates to a method to cast a web of a material containing alkaloids.