Cardboard Separator for Multistage Pyrotechnic Device
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Solution Overview
Problem
Existing multistage pyrotechnic devices suffer from environmental contamination due to the long degradation process of plastic or felt separators, which are dispersed after use and require removal to mitigate environmental impact.
Innovation Solution
A multistage pyrotechnic device utilizing cardboard separators with a multilayer structure composed of thin end disks, spacing rings, and intermediate disks, where the cardboard materials ensure quick degradation and minimize environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plastic or felt separators are used in multistage pyrotechnic devices, then the separators provide adequate insulation and structural integrity, but the separators cause environmental contamination due to long degradation processes
Solution Approach 1:
The patent changes the material parameter of the separator from synthetic materials (plastic, felt) to natural biodegradable material (cardboard). This material substitution maintains the insulating function while fundamentally altering the degradation characteristic from long-term persistence to rapid breakdown, thereby resolving the environmental contamination issue without sacrificing reliability
Solution Approach 2:
The patent employs cardboard as a disposable, short-living separator material that naturally degrades quickly after use. Unlike permanent plastic or felt separators, the cardboard separator is designed to break down rapidly in the environment, transforming the separator from a long-lasting contaminant into a temporary functional element that eliminates environmental harm after completing its insulating duty
2Object-affected harmful factors
If cardboard separators are used instead of plastic or felt, then environmental degradation is reduced, but the structural integrity and insulation performance may be compromised
Solution Approach 1:
The patent utilizes cardboard as a composite material structure consisting of layered paper fibers bound together. This composite construction provides sufficient mechanical strength and thermal insulation for the separator function while maintaining biodegradability. The layered structure of cardboard inherently offers both structural integrity and insulating properties, resolving the contradiction between durability and environmental friendliness
3Reliability
If multi-layer cardboard structure is implemented, then separator strength and insulation are improved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the separator into multiple cardboard layers with different orientations and densities. This segmentation approach enhances the overall structural integrity and insulating performance by creating a more robust barrier, while each individual layer remains simple in structure. The segmented layered design achieves improved performance without requiring complex manufacturing processes, as each layer can be produced independently and assembled through simple stacking
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 cardboard separators degrade rapidly, eliminating the need for residue removal and reducing environmental contamination, while maintaining the sequential firing of pyrotechnic stages with desired delay and effect.
Implementation Method 1
a fuse (U) in the axial conduit (80a) of the plastic bushing (80)... a flame front produced in the launching chamber (C) of a pyrotechnic stage (ST)... triggering the launching charge (C)
Implementation Method 2
the launching charge (C) explodes and launches the effect means (M) and the separator (8, 9) out of the launching tube (DD)
Implementation Method 3
the natural degradation and decomposition of said residues are very long processes... the cardboard separators degrade rapidly, eliminating the need for residue removal
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
A multistage pyrotechnic device (100) comprising a launching tube (DD) and at least two pyrotechnic stages (ST) disposed inside the launching tube (DD); each pyrotechnic stage (ST) comprises a launching charge (C) and effect means (M); the pyrotechnic device (100) comprises a separator (1) disposed between the two pyrotechnic stages (ST) and provided with an axial conduit (10) suitable for housing a fuse (U); the peculiarity of the pyrotechnic device (100) consists in the fact that the separator (1) comprises a first thin end disk (11) made of cardboard, a second thin end disk (12) made of cardboard with a diameter (d1), and at least one spacing ring (2) made of cardboard with a diameter (d2) and disposed between the two thin end disks (11, 12); the internal diameter (d3) of the launching tube (DD) is higher than the diameter (d2) of the spacing ring (2) and is lower than the diameter (d1) of the thin end disks (11, 12).