Firearm Sound Suppressor Using TPMS Porous Baffles
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Solution Overview
Problem
Conventional sound suppressors for firearms face challenges in efficiently reducing noise, heat, and mechanical energy due to high pressures and velocities of propellant gases, while also being limited by space and material constraints.
Innovation Solution
The use of triply periodic minimal surfaces (TPMS) structures in the suppressor core, which provides a high surface area-to-volume ratio to slow and cool propellant gases, while also being designed to withstand the demanding conditions of firearm projectiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional baffles and expansion chambers are used, then noise reduction is achieved, but the device complexity and material usage increase
Solution Approach 1:
The patent employs a porous baffle structure with controlled pore sizes and distributions to reduce noise through enhanced gas scattering and absorption. The porous configuration provides increased surface area for gas interaction without requiring complex multi-component assemblies, thereby achieving noise reduction while simplifying device architecture.
Solution Approach 2:
The invention utilizes composite materials combining different porous materials with varying pore characteristics in a single integrated baffle structure. This allows simultaneous optimization of noise reduction performance and structural simplicity, as the composite material achieves multiple functions (gas scattering, absorption, pressure reduction) within a unified component rather than requiring separate baffles and chambers.
2Object-affected harmful factors
If more baffles and expansion chambers are added, then noise reduction improves, but the weight and material cost increase
Solution Approach 1:
The porous baffle structure reduces weight compared to solid conventional baffles while maintaining noise reduction effectiveness. The porous configuration provides sufficient gas scattering and absorption through controlled porosity rather than material density, achieving the desired noise reduction with reduced mass.
Solution Approach 2:
The composite material construction allows selection of materials with optimized density and porous characteristics that provide maximum noise reduction per unit mass. This enables achieving superior noise reduction performance while minimizing weight compared to traditional homogeneous materials and multi-component designs.
3Object-affected harmful factors
If the suppressor volume is increased, then gas dispersion and noise reduction improve, but the device size and complexity increase
Solution Approach 1:
The porous baffle structure provides enhanced gas dispersion and noise reduction within a compact volume. The high surface area-to-volume ratio of the porous structure enables effective gas interaction and energy dissipation without requiring large overall suppressor dimensions, thus achieving superior noise reduction in a compact package.
Solution Approach 2:
The integrated composite material baffle structure achieves multiple functions (gas scattering, absorption, pressure reduction, and thermal management) within a single compact component. This eliminates the need for separate expansion chambers and multiple baffles, reducing overall device volume while maintaining or improving noise reduction performance.
Data Source
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AI summary
Noise suppressors for firearms are disclosed, having a cylindrical body extending along a longitudinal direction, a chamber having an annular cylindrical shape, and a suppression core in the chamber. The chamber has an outer diameter defined by an inner surface of the body, an inner diameter forming a center bore, and a length along the longitudinal direction. The suppression core has a triply periodic minimal surfaces (TPMS) structure. A wall thickness or unit cell size of the TPMS structure may vary along longitudinal or radial directions. The suppression core may have an inner portion and an outer portion, where at a transition between the inner and outer portions, a plurality of first openings in the inner portion and a plurality of second openings in the outer portion have a parameter that matches in size with each other, and the first and second openings are approximately aligned with each other.