Pyrotechnic Propelling Charge Master Batch Mixing
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Solution Overview
Problem
The increasing number of gas generator variants and power gradations leads to a high number of propelling charge variants that need to be individually fabricated and tested, resulting in significant logistical and testing efforts, with many batches not meeting ballistic specifications, thus requiring separate pressing and storage.
Innovation Solution
A pyrotechnical propelling charge is produced using a combination of master batches with defined geometry and relative quickness, allowing for flexible mixing ratios to achieve desired ballistic properties, reducing the need for multiple propellant variants and enabling just-in-time production, thereby reducing costs and testing efforts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple propelling charge variants are individually fabricated to meet different gas generator requirements, then the adaptability to different gas generator variants is improved, but the device complexity and manufacturing effort increase significantly
Solution Approach 1:
The propelling charge is segmented into master batches with defined geometry and relative quickness characteristics. These master batches serve as standardized building blocks that can be mixed in different ratios to create various propelling charge variants, reducing the need to fabricate each variant from scratch.
Solution Approach 2:
A universal set of master batches is created that can serve multiple gas generator variants. By mixing these master batches in different proportions, a single set of master batches can fulfill the requirements for multiple different propelling charge specifications, eliminating the need for separate pressing and storage of each variant.
2Manufacturing precision
If multiple propelling charge variants are produced and stored separately, then the ballistic precision for different gas generator types is improved, but the loss of time and logistical effort increase
Solution Approach 1:
Master batches are prepared in advance with defined geometry and relative quickness characteristics. This preliminary action allows for rapid mixing and production of specific propelling charge variants when needed, eliminating the time-consuming process of fabricating and testing each variant from scratch.
Solution Approach 2:
Instead of creating physically different propellant variants, the invention changes the ballistic parameters by varying the mixing ratios of master batches. This allows precise control over ballistic properties without requiring separate pressing and storage facilities for each variant.
3Reliability
If separate pressing and storage facilities are maintained for each propelling charge variant, then the reliability of ballistic specifications is improved, but the manufacturing cost and resource consumption increase
Solution Approach 1:
Multiple propelling charge variants are merged into a unified system based on master batch combinations. Instead of maintaining separate pressing and storage facilities for each variant, the invention combines master batches in different ratios to produce the required variants, significantly reducing facility requirements and manufacturing costs while maintaining ballistic specification reliability.
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 allows for the production of propelling charges with predetermined ballistic profiles at lower costs, reducing the number of variants that need to be stored and tested, while enabling flexible response to different gas generator variants without the need for new propellant variants, thus optimizing production and logistics.
Implementation Method 1
Pyrotechnical gas generators are suited to activate said safety devices as they produce the amount of gas required sufficiently quickly
Data Source
AI summary
A gas generator for use for a safety device in vehicles comprises a pyrotechnical propelling charge, wherein the propelling charge is formed from a first and at least a second master batch which are in a mixed state in a filling. Each master batch has a plurality of molded propellant bodies having defined geometry and having a relative quickness. The relative quickness RQ2 of the second master batch is less than the relative quickness RQ1 of the first master batch, wherein RQ2=RQ1·fq and fq≤0.9. The invention further relates to a method for producing the propelling charge.