Exothermic Weld Cavity Geometry for Slag Separation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional exothermic welding containers face challenges in efficiently separating molten metal from slag, leading to inconsistent welds and increased manufacturing costs due to conventional geometries that require higher heights for weld volumes.

Innovation Solution

The design of an exothermic welding container with an inverted trapezoidal or rectangular riser section and bottom section configuration, allowing for easier separation of slag and molten metal, and potentially reducing the overall height and manufacturing costs through additive manufacturing techniques like binder jetting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional exothermic welding container geometries are used, then the container can perform welding operations, but the separation of molten metal from slag is inefficient, leading to inconsistent welds and increased manufacturing costs

Engineering Contradiction:

Improveweld consistencyVSAvoidmanufacturing cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent inverts the conventional weld cavity geometry by positioning the tap hole at the bottom rather than the top, and creating an upwardly extending riser section. This inversion allows slag to float upward away from the weld pool while molten metal flows downward into the weld cavity, dramatically improving separation efficiency and weld consistency.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent introduces a vertical dimension to the weld cavity geometry with the riser section extending upward from the tap hole. This vertical orientation creates distinct zones for slag accumulation (upper portion) and molten metal flow (lower portion), enabling efficient separation that was not achievable with conventional horizontal geometries.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of manufacture

If conventional exothermic welding container geometries are used, then the container can perform welding operations, but the overall height and manufacturing costs increase

Engineering Contradiction:

Improvemanufacturing costVSAvoidcontainer height

Core Design Contradiction:

Ease of manufactureVSLength of stationary object

Solution Approach 1:

The patent optimizes the dimensional parameters of the weld cavity, particularly the riser section height and tap hole positioning. By carefully controlling these parameters, the design achieves effective slag-metal separation while minimizing the overall container height, making it suitable for additive manufacturing with reduced material consumption and cost.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If conventional weld cavity geometries are used, then the container can perform welding operations, but the separation of slag and molten metal is inefficient

Engineering Contradiction:

Improveseparation efficiencyVSAvoidweld quality

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The inverted geometry with bottom-positioned tap hole and upward riser section reverses the conventional approach, allowing natural buoyancy to drive slag upward while molten metal flows downward into the weld cavity. This inversion creates efficient separation that directly improves both productivity and weld quality.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The weld cavity geometry leverages the natural buoyancy of slag to achieve self-separation from molten metal without requiring external forces or complex mechanisms. The upwardly extending riser section allows slag to automatically float and accumulate in the upper portion, while molten metal naturally flows downward into the weld area.

Inventive Principle:

Principle #25Self-service

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

This configuration enhances the separation of slag from molten metal, resulting in more consistent welds and reduced manufacturing costs by optimizing the weld cavity geometry, improving the efficiency and effectiveness of the exothermic welding process.

Implementation Method 1

an exothermic welding process can provide a bond with a current carrying capacity substantially equal to that of the conductors themselves

Methodology Applied

Scientific EffectExothermic reaction: Exothermic Reaction

Implementation Method 2

The tap hole can extend from a lower end of the crucible chamber

Methodology Applied

Scientific EffectGravity: Gravitation

Data Source

PatentUS20240424599A1Exothermic Welding Device

Publication Date: 2024.12.26 ERICO INTERNATIONAL CORP

AI summary

An exothermic welding container for welding at least two electrically conductive items together. The exothermic welding container can include one or more mold pieces that define a crucible chamber and a weld cavity. A tap hole can extend between the crucible chamber and the weld cavity. A set of channels, including a first channel and a second channel that intersect the weld cavity, spaced apart from the tap hole. The weld cavity can have a width that increases over a vertical rise away from the set of channels. The second weld cavity portion can include a riser section and a lower section.