Composite Protective Door Core for Bullet and Explosion Resistance

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Solution Overview

Problem

Existing protective doors lack comprehensive protection against explosions, bullets, fire, and theft, with current bulletproof doors failing to meet multi-functional security requirements.

Innovation Solution

A manufacturing method involving the use of composite door core panels made from explosion-proof, bullet-proof, high-temperature resistant, impact-resistant, anti-radiation, and fireproof materials, combined with a low-carbon steel frame, and integrated with an intelligent lock system, ensuring precise assembly and coating processes to enhance structural integrity and functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If ordinary security doors are used with simple structure and single materials, then manufacturing cost and simplicity are maintained, but security performance against explosions and bullets is insufficient

Engineering Contradiction:
Improvesecurity performanceVSAvoidstructure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies composite materials by combining multiple layers including steel plates, explosion-proof materials, bullet-proof materials, fire-proof materials, and thermal insulation materials to create a door core panel that simultaneously achieves explosion-proof, bullet-proof, fire-proof, and insulation performance, resolving the contradiction between security performance and structural simplicity

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The door structure is segmented into multiple functional layers (steel plates, explosion-proof materials, bullet-proof materials, fire-proof materials, thermal insulation materials) that can be manufactured and assembled separately, then combined to achieve comprehensive security performance without requiring a completely new complex structure

Inventive Principle:
Principle #1Segmentation

2Adaptability or versatility

If current bulletproof doors are used with individual bulletproof function, then manufacturing complexity is kept low, but multi-functional requirements (explosion-proof, fire-proof, anti-theft) cannot be met

Engineering Contradiction:
Improvemulti-functional capabilityVSAvoidmanufacturing process complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements multi-functionality by integrating explosion-proof, bullet-proof, fire-proof, and thermal insulation functions into a single door core panel through layered composite materials, allowing one door structure to meet multiple security requirements simultaneously, thus achieving versatility without proportionally increasing manufacturing complexity

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

By using composite materials with different functional properties (explosion-proof, bullet-proof, fire-proof, insulation) layered together in the door core panel, the patent enables a single component to deliver multiple protective functions, addressing the need for multi-functional capability

Inventive Principle:
Principle #40Composite materials

3Manufacturing precision

If traditional welding and spraying processes are used, then manufacturing simplicity is maintained, but structural integrity and aesthetic quality are insufficient

Engineering Contradiction:
Improveassembly precisionVSAvoidmanufacturing difficulty
Core Design Contradiction:
Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent applies preliminary action by pre-assembling the composite door core panel with all functional layers (steel plates, explosion-proof materials, bullet-proof materials, fire-proof materials, thermal insulation materials) before final door assembly, ensuring precise alignment and structural integrity while simplifying the final manufacturing process

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent replaces traditional welding processes with mechanical assembly methods for the composite door core panel layers, using precise cutting and fitting techniques that eliminate the need for welding while achieving high assembly precision and structural integrity

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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 method results in a protective door with integrated fireproof, anti-theft, explosion-proof, and bulletproof capabilities, enhancing security and intelligence through multi-performance integration while maintaining product quality and aesthetics.

Implementation Method 1

cutting the core panel materials into the specified dimensions with a laser cutting machine

Methodology Applied
Scientific EffectLaser: Laser

Implementation Method 2

coating the front and rear mating surfaces of each layer of the composite door core panel with two-component silicone adhesive

Methodology Applied
Scientific EffectAdhesive: Adhesive

Implementation Method 3

placed in a pressing machine to be pressed into the specified dimensions

Methodology Applied
Scientific EffectCompression: Compression

Implementation Method 4

hunging them on the curing oven production line for spray coating and curing

Methodology Applied
Scientific EffectHeating: Heating

Data Source

PatentUS12595701B2Manufacturing method of an intelligent anti-terrorism protective door
Publication Date: 2026.04.07 LIU ENYUAN

AI summary

A manufacturing method of an intelligent anti-terrorism protective door comprises the following steps: S1, making front and rear door panels; S2, cutting the composite door core panel materials; S3, making protective door frame; S4, assembling bulletproof and explosion-proof armored composite door core panel; S5, making the door frame; S6, decorating the surface of the protective door; S7, overall assembly; S8, installing the lock; S9, packaging the protective door. The manufacturing method is simple and easy to implement, with strict control over every aspect from raw materials, production processes, to quality control during the manufacturing process, ensuring the product quality. This not only makes the product fire-proof and anti-theft, but also has explosion-proof and bulletproof properties, effectively preventing explosions and bullet attacks, greatly improving the security of the protective door.