Two-Stage Compression for Aerosol Heat Source Filling
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Solution Overview
Problem
The existing methods for manufacturing combustible heat sources for aerosol forming articles are inefficient, leading to high rejection rates and waste due to insufficient filling of particulate components in the cavity, which is exacerbated by the mechanical fluidity and density issues of the particulate material.
Innovation Solution
A method involving a two-pressure compression process where a first pressure is applied in a chamber to ensure proper filling of the particulate component into a cavity, followed by a second pressure to compact it into a heat source, optimizing the filling and density without compacting the material excessively, thus reducing waste and increasing production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-pressure compression process is used, then the manufacturing process is simpler, but the filling accuracy and density control of particulate component deteriorate
Solution Approach 1:
The compression process is segmented into two distinct stages: a first compression stage applying a first pressure to achieve proper filling of the particulate component into the cavity, and a second compression stage applying a second pressure to compact the material into the final heat source form. This segmentation allows each stage to optimize for its specific function, resolving the contradiction between process simplicity and manufacturing precision.
Solution Approach 2:
The first compression stage performs a preliminary action by applying a lower first pressure to ensure complete filling of the particulate component into the cavity before the second compression stage applies higher pressure for compacting. This preliminary filling action prevents material deficiency issues that would require rework or rejection, thereby improving manufacturing precision without excessively complicating the overall process.
2Manufacturing precision
If higher pressure is applied during compression, then the density of heat source improves, but the risk of excessive compaction and material waste increases
Solution Approach 1:
The compression pressure is segmented into two levels: a first pressure applied in the first stage to achieve proper filling without excessive compaction, and a second pressure applied in the second stage to achieve the target density. This segmentation allows precise control over the compression process, ensuring optimal density while minimizing material waste from excessive compaction or defective products requiring rejection.
Solution Approach 2:
The compression parameter (pressure) is changed between two distinct stages: a相对较低的第一压力用于初步填充，然后是一个较高的第二压力用于最终压实。这种参数的分阶段变化使得能够在不同阶段实现不同的控制目标，既保证了密度控制精度，又避免了单一高压导致的材料浪费。
3Productivity
If the particulate component is not properly filled, then the manufacturing speed can be maintained, but the rejection rate increases and waste is generated
Solution Approach 1:
The first compression stage performs a preliminary filling action that ensures the particulate component is properly filled into the cavity before the second compression stage begins. This preliminary action prevents filling deficiencies that would lead to product rejection and waste, while the streamlined two-stage process maintains efficient manufacturing speed by avoiding the need for complex additional filling steps or rework operations.
4Manufacturing precision
If a multi-stage compression process is implemented, then the quality of heat source improves, but the manufacturing time increases
Solution Approach 1:
The compression process is segmented into two functional stages with distinct pressure levels: the first stage focuses on proper filling at a lower pressure, and the second stage focuses on compacting at a higher pressure. This segmentation improves heat source quality by ensuring both filling completeness and appropriate density, while the two-stage structure remains efficient enough to maintain acceptable manufacturing cycle times.
Solution Approach 2:
The two compression stages are implemented as a continuous process where the first compression stage transitions directly into the second compression stage without interruption. This continuity ensures that the useful action of compression is maintained throughout both stages, improving heat source quality through progressive densification while minimizing idle time and maintaining efficient manufacturing throughput.
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
This method minimizes waste and accelerates the manufacturing process by ensuring accurate filling and proper density of the heat source, enhancing the efficiency of heat source production and gas release during combustion.
Implementation Method 1
compressing the particulate component in the chamber up to a first pressure so that it forcedly flows into said cavity
Implementation Method 2
compressing the particulate component in the cavity up to a second pressure higher than said first pressure to form the heat source
Data Source
Figure 1a~1b
Figure 1c~2b
AI summary
The invention relates to a method for the manufacturing of a combustible heat source (1) for an aerosol forming article, comprising: - Providing a mould (100) defining a cavity (101) having a first opening (102); - Providing a chamber (106) above said cavity (101), the chamber (106) having a second opening (108) fluidly connected to the first opening (102); - Placing a particulate component (104) in the chamber (106); - compressing the particulate component (104) in the chamber (106) up to a first pressure so that it forcedly flows into said cavity (101); and - compressing the particulate component (104) in the cavity (101) up to a second pressure higher than said first pressure to form the combustible heat source (1).