Grooved Multilayer Pyrotechnic Block Cohesion
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Solution Overview
Problem
The existing processes for manufacturing primed pyrotechnic bars with radial combustion are costly, labor-intensive, and result in weak cohesion between the primer and main compositions, leading to suboptimal combustion profiles and infrared emission performance.
Innovation Solution
A method involving the simultaneous arrangement and compression of primer and main compositions in a shaping tool to form a grooved multilayer block, eliminating the need for additional priming steps and solvent-based pastes, thereby enhancing cohesion and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If primer composition is deposited in paste form in grooves of pyrotechnic block, then pyrotechnic bar can be initiated, but weak cohesion between primer and main composition results, leading to poor fire transmission and suboptimal combustion profile
Solution Approach 1:
The patent merges the primer composition and main pyrotechnic composition into a single integrated block through simultaneous compression, eliminating the groove-deposition method. This combining approach ensures strong cohesion between compositions and optimal fire transmission, resolving the contradiction between reliability and strength.
Solution Approach 2:
The patent uses composite material formulation where primer and main compositions are mixed together in a granular form before compression. This composite approach creates strong interfacial bonding while maintaining distinct functional zones, achieving both high cohesion and reliable fire transmission.
2Ease of manufacture
If primer composition is manufactured and deposited as paste in solvent, then pyrotechnic bar can be primed, but limited lifespan of paste and binding planning requirements result, increasing manufacturing complexity
Solution Approach 1:
The patent changes the physical state parameter of the primer composition from paste form to granular solid form. This parameter change eliminates solvent-related shelf-life limitations and allows the primer to be stored and handled like conventional pyrotechnic materials, simplifying manufacturing infrastructure and eliminating binding planning requirements.
Solution Approach 2:
The patent extracts the solvent component from the primer composition entirely. By formulating the primer as a solvent-free granular mixture, the invention eliminates the limitations associated with solvent-based pastes, including limited lifespan and storage constraints, thereby simplifying the manufacturing process and reducing infrastructure complexity.
3Manufacturing precision
If multiple separate steps are used for shaping and priming pyrotechnic blocks, then distinct functions can be optimized, but manufacturing time and costs increase significantly
Solution Approach 1:
The patent combines the shaping and priming operations into a single simultaneous compression step. The primer composition and main composition are compressed together in one operation, achieving both precise integration and high manufacturing efficiency. This eliminates the need for separate shaping and priming steps, resolving the contradiction between precision and productivity.
Solution Approach 2:
The patent prepares both primer and main compositions in advance as granular materials with predetermined proportions and properties. This preliminary preparation allows the actual formation and priming to occur simultaneously in one compression step, maintaining manufacturing precision while maximizing production speed.
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 approach simplifies the manufacturing process, improves mechanical strength, reduces vulnerability to mechanical attacks, and optimizes infrared performance by ensuring better transmission of light and combustion efficiency, while extending the lifespan of primer compositions and reducing production time and costs.
Implementation Method 1
shaping, of preferably by compression
Implementation Method 2
In order to ensure the cohesion of the two compositions (primer and main)
Implementation Method 3
The combustion of an infrared type pyrotechnic bread is characterized by its luminance, its duration and its rising edge
Data Source
Figure 1(a)~2
Figure 3~4
Figure 5(a)~6
AI summary
The present invention concerns initiated pyrotechnic blocks, the method for producing same and the use thereof. The method for producing said initiated pyrotechnic block in the form of a preferably grooved multilayer block, comprises the following successive steps: 1) successive arrangement, in a shaping tool, of at least: a) one layer (a) of initiating composition, and b) one layer (b) of main composition, 2) shaping, preferably by compression.