Modular Polyurethane Bullet Trap with Granulate Filling
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Solution Overview
Problem
Existing bullet trap systems face challenges in reliably and safely catching projectiles, preventing rebound and fragment dispersion, while also being space-efficient and easy to install and maintain.
Innovation Solution
A bullet trapping device comprising modular units with polyurethane walls and granulate filling, where each module is designed to absorb projectile energy, with a modular structure allowing for continuous interior connection and easy replacement of damaged units, and a cuffing mechanism to prevent filling escape through penetration points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bullet trap system uses a solid wall structure to prevent projectile rebound and fragment dispersion, then safety and reliability are improved, but the device becomes more complex and harder to install and maintain
Solution Approach 1:
The bullet trap system is divided into multiple modular units, each containing a wall made of bullet-penetrable material and a filling material for energy absorption. These modules can be individually installed, maintained, or replaced without affecting the entire system, thus improving reliability while managing complexity through standardization.
Solution Approach 2:
The system uses composite construction with a wall made of bullet-penetrable material (such as plastic or rubber particles) combined with a filling material (such as sand, gravel, or rubber granules). This composite structure effectively stops projectiles and absorbs energy while maintaining a manageable system architecture.
2Reliability
If the bullet trap system uses sufficient filling material to absorb all projectile energy, then safety and energy absorption are improved, but the volume and space requirement increase
Solution Approach 1:
The filling material properties are optimized locally within each module to provide maximum energy absorption in the smallest volume. The wall thickness and filling material type (sand, gravel, rubber granules) are specifically selected for the expected projectile types and energies, ensuring efficient space utilization while maintaining safety.
Solution Approach 2:
The combination of a penetrable wall material with high-density filling materials creates an efficient energy absorption system that maximizes stopping power per unit volume, reducing the overall space requirement while maintaining reliable projectile capture.
3Reliability
If the wall material is made highly penetrable to allow projectile entry, then projectile capture is improved, but the structural strength and durability decrease
Solution Approach 1:
The wall is constructed from composite materials such as plastic particles, rubber particles, or other bullet-penetrable substances that are sufficiently soft to allow projectile penetration while maintaining structural integrity. These materials absorb impact energy through deformation and fragmentation, providing both penetrability and durability.
Solution Approach 2:
The wall material properties are carefully selected to balance penetrability and strength - using materials with specific hardness, elasticity, and tensile strength parameters that allow projectile entry while resisting catastrophic failure from repeated impacts.
4Ease of operation
If modular units are designed for easy replacement and maintenance, then ease of operation is improved, but the connection complexity between modules increases
Solution Approach 1:
The system is divided into discrete modular units with standardized interfaces. Each module can be independently removed and replaced by disconnecting the coupling elements, allowing easy maintenance without requiring complex disassembly procedures or specialized tools.
Solution Approach 2:
The coupling elements are designed with universal, standardized connection mechanisms that work across all module types in the system. This standardization simplifies the connection process and allows the same coupling design to be used throughout the entire bullet trap system, reducing overall complexity.
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
Ensures reliable and safe projectile capture, prevents rebound and fragment dispersion, and allows for easy maintenance and expansion of the system, maintaining operational safety and efficiency.
Implementation Method 1
an interior space circumferentially surrounded by the wall is filled with a filling material as a filling, the wall and/or the filling being made of a polyurethane
Implementation Method 2
the filling being in the form of granulate, with polygons more precisely a polyhedron structure
Implementation Method 3
a bullet trapping module, or module for short, in particular for absorbing bullet energy
Data Source
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AI summary
The subject matter of the present invention relates to a projectile receiving device (100) for a projectile receiving device (10) for a projectile receiving system (1), comprising a projectile receiving module (110) for absorbing projectile energy, which has a circumferential wall (111), wherein the wall (111) of the projectile receiving module (110) is made of a module material penetrable by projectiles and an interior space (113) circumferentially surrounded by the wall (111) is filled with a filling material, wherein the wall (111) and/or the filling is/are made of polyurethane and/or the filling is formed as granules with a polygonal or polyhedral structure. The subject matter of the invention further relates to a projectile receiving device (10), a projectile receiving system (1), and a method and use thereof.