Two-Piece Door End Cap With Interlocking Clip And Beam
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional methods for manufacturing metal doors, such as welding and adhesive bonding, are time-consuming, costly, and unsatisfactory due to material limitations and safety concerns, while monolithic end caps face challenges in durability and thermal conductivity, necessitating a more efficient and environmentally resilient interlocking door assembly.
Innovation Solution
The interlocking door assembly features mechanically connected door skins with adhesive fixation and non-monolithic end caps composed of different materials for enhanced durability and thermal performance, utilizing locking tabs, mounting slots, and protrusions for secure engagement and thermal breaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If welding is used to manufacture metal doors, then the door provides great resistance to harsh environments and fire, but the process is time-consuming, costly, and produces unattractive seams requiring sanding and polishing
Solution Approach 1:
The patent replaces the welding process (thermal/mechanical system) with a mechanical interlocking system using tabs and slots. The door skins are connected through interlocking tabs that fit into slots, eliminating the need for welding operations while maintaining structural integrity and environmental resistance.
Solution Approach 2:
The patent extracts the problematic welding operation from the manufacturing process and replaces it with pre-formed interlocking components. The tabs and slots are created during forming operations, separating the connection function from the joining function that welding previously performed.
2Productivity
If adhesive is used to bond door skins, then the process is easier, cheaper, and faster than welding, but the adhesive cannot endure high heat of fire and will melt, posing a safety hazard
Solution Approach 1:
The patent replaces the adhesive bonding system (chemical system) with a mechanical interlocking system using tabs and slots. This mechanical connection maintains both the manufacturing efficiency of adhesive bonding and the fire resistance required for safety, as the mechanical structure does not degrade under high heat conditions.
3Device complexity
If monolithic end caps are used, then the structure is simple, but the end caps are difficult to manufacture due to conflicting requirements of durability, formability of connecting elements, and thermal break performance
Solution Approach 1:
The patent divides the end cap into two separate components: a beam element and a locking clip element. This segmentation allows each component to be optimized for its specific function - the beam for structural durability and the locking clip for formable connecting elements - while together they provide the required thermal break performance.
Solution Approach 2:
The patent employs composite construction by combining two different elements (beam and locking clip) that can be made from different materials or material treatments. This composite approach resolves the conflicting material requirements by allowing each component to use the most suitable material for its specific functional requirements.
Data Source
AI summary
This invention relates to a door assembly comprising a pair of door skins which are mechanically secured together to define a top and bottom opening. The top and bottom openings receive an end cap therein to complete the door. The end cap of the present invention is comprised of two separate pieces, namely a locking clip and a beam, whereby the locking clip is slidably engaged with the beam to form the end cap. This allows a manufacturer to form the locking clip with a first material and the beam with a second material, depending on the specific requirements of the door.