Cast Booster Pre-Formed Cup-Shaped Core
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Solution Overview
Problem
Existing booster designs for initiating relatively insensitive explosives are costly, hazardous to handle, and have unreliable detonation transfer due to poor core coupling and variable core positioning, leading to increased labor and material costs.
Innovation Solution
A novel booster design featuring a pre-formed, cup-shaped explosive core with a granular coated composition and an organic binder, allowing for precise control over core density and shape, which improves detonation transfer reliability and reduces handling hazards, and a surrounding sheath explosive tailored to the core's output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pre-formed cup-shaped explosive core with organic binder is used, then detonation transfer reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The explosive core is pre-formed with a cup-shaped configuration and organic binder application before being inserted into the booster housing. This preliminary preparation ensures proper shape and binding characteristics, improving detonation transfer reliability while allowing for standardized manufacturing processes
Solution Approach 2:
The organic binder modifies the physical and chemical parameters of the granular explosive material, creating a cohesive pre-formed core structure. This parameter change enables the explosive to maintain its cup shape and provides predictable detonation characteristics, resolving the reliability issue
2Manufacturing precision
If a pre-formed cup-shaped explosive core is used, then core positioning precision is improved, but manufacturing labor increases
Solution Approach 1:
The cup-shaped core is pre-formed with locating features that engage with corresponding elements in the booster housing. This preliminary shaping ensures precise positioning when the core is inserted, eliminating the need for complex positioning mechanisms or additional assembly steps
Solution Approach 2:
The pre-formed cup shape itself provides the positioning function through its geometry, allowing the core to self-align and locate within the booster housing during assembly. This self-locating feature reduces the need for additional positioning components and simplifies the manufacturing process
3Object-affected harmful factors
If granular explosive with organic binder is used, then handling safety is improved, but material cost increases
Solution Approach 1:
The organic binder changes the physical state and handling characteristics of the granular explosive, converting it from a loose, sensitive material into a cohesive, bound core. This parameter change reduces friction sensitivity and improves handling safety, with the binder cost offset by reduced explosive material requirements and lower insurance/handling costs
4Use of energy by moving object
If a sheath explosive tailored to core output is used, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The sheath explosive is specifically formulated with different composition and sensitivity characteristics than the core, creating a localized quality match between the core output and sheath initiation requirements. This tailored composition ensures efficient energy transfer and reliable main charge initiation, with the complexity justified by the performance optimization
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 design enhances the reliability and safety of detonation transfer, reduces manufacturing labor and costs, and allows for precise optimization of core and sheath compositions, resulting in a more efficient and cost-effective booster.
Implementation Method 1
an organic binder that makes the granular explosive composition free-flowing and reduces the granular explosive's sensitivity to friction
Implementation Method 2
The compression is controlled to produce an explosive core having a predetermined density and size
Implementation Method 3
The explosive core is positioned in the main housing... causing it to combust or detonate and the output of the initiating assembly causes the main charge to detonate or combust
Data Source
AI summary
An improved cast booster design and method of assembly is provided for the detonation of blasting agents. The booster design utilizes a pre-formed core that simplifies assembly of the booster and increases the reliability of detonation transfer from a blasting cap. The pre-formed core has a cup shaped aperture provides improved coupling with the initiation source. The pre-formed core is made using a relatively insensitive explosive composition that can be manufactured using high speed pressing methods. The explosive composition allows for the attainment of a well defined shape with a predictable density. The pre-formed core shape mates with the casting mold in a way that ensures the location of the core within the booster thereby improving reliability and reducing labor associated with the booster manufacturing operation.