Solid Core Door Dovetail Joints for Sturdy Assembly

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Solution Overview

Problem

Existing methods for manufacturing solid core doors with rails and stiles often use traditional tongue and groove designs, which fail to provide a solid, secure connection between components, leading to a lack of sturdiness and aesthetic appeal.

Innovation Solution

The use of specialized dovetail joints to securely connect the components of solid core doors, including applying glue to joints and pressing the door from the sides to enhance sturdiness, along with covering the joints with a door cover to improve aesthetics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If traditional tongue and groove joints are used to connect door components, then the manufacturing process is simple, but the connection strength and sturdiness are insufficient

Engineering Contradiction:

Improveconnection strengthVSAvoidjoint structure complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The door components are divided into separate stiles and rails that are joined through dovetail joints, allowing each component to be manufactured independently and then securely assembled. This segmentation enables stronger individual pieces to be connected through interlocking joints rather than relying on weak groove connections.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dovetail joint uses an asymmetric geometry with tapered tails that fit into corresponding channels, creating a mechanically superior connection compared to symmetric tongue and groove joints. The asymmetric shape provides greater surface area for glue bonding and mechanical interlocking, significantly improving connection strength.

Inventive Principle:

Principle #4Asymmetry

2Shape

If door components are joined with visible seams and joints, then the manufacturing process is straightforward, but the aesthetic appeal is reduced

Engineering Contradiction:

Improveaesthetic appearanceVSAvoidmanufacturing complexity

Core Design Contradiction:

ShapeVSEase of manufacture

Solution Approach 1:

The visible seams and joints are extracted or removed from the door surface by using dovetail joints that can be concealed within the door structure. The interlocking joints allow connections to be made without creating visible surface disruptions, maintaining aesthetic appearance while still providing secure connections.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If solid core doors use multiple wood pieces joined together, then the door provides good sound absorption, but the door lacks sturdiness and durability

Engineering Contradiction:

Improvedoor durabilityVSAvoidnumber of components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Dovetail joints are pre-formed on the stiles and rails before final assembly, ensuring that the connection structures are ready to provide maximum strength from the outset. This preliminary preparation of joint surfaces and geometries ensures that when components are assembled, they achieve optimal structural integrity and durability.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250198231A1Solid core door with dovetail joints and method of manufacturing the same

Publication Date: 2025.06.19 LETAFAT HASSAN

AI summary

Embodiments of the present invention describe novel solid core doors and methods of manufacturing solid core doors that use specialized dovetail joints to secure components of the door together to improve the sturdiness and aesthetics of the door. The manufacturing processes can include applying glue to joints between components, and pressing the door from the sides to secure the components together in a way that improves the sturdiness of the door.