Metallic Elbow Jacket Forming with Radiused Finger Mold
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing metal insulation jackets for pipes with bends, particularly elbows, face challenges with non-uniformity due to the use of multiple metal types and susceptibility to dents and creases, which lead to corrosion and maintenance issues, especially when using harder metals like 3000 series aluminum or stainless steel.
Innovation Solution
A protective metal jacket with a semi-circular cross-section and multiple fingers, each with a fillet at the junction and peak, made from durable materials like 3000 series aluminum or stainless steel, featuring a polysurlyn coating and a gapless seam for improved durability and corrosion resistance, along with a specialized mold for manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If softer 1000 series aluminum is used for elbow jackets to facilitate wrapping around bends, then ease of forming is improved, but susceptibility to dents and corrosion increases
Solution Approach 1:
The patent changes the material parameter from soft 1000 series aluminum to harder 3000 series aluminum or stainless steel, which provides both improved corrosion resistance and adequate formability when combined with the new mold design featuring radiused corners and finger projections
2Reliability
If harder metals like 3000 series aluminum or stainless steel are used for elbow jackets to improve durability, then corrosion resistance is improved, but formability and ease of molding deteriorate
Solution Approach 1:
The patent divides the mold into multiple finger projections that can independently move and flex, allowing the mold to accommodate the higher strength materials by distributing forming stresses across multiple segmented elements rather than a single rigid mold structure
Solution Approach 2:
The patent introduces radiused corners and curved surfaces in the mold design, replacing sharp angles with gradual transitions that reduce stress concentrations and enable successful forming of harder metals like 3000 series aluminum and stainless steel
3Ease of manufacture
If traditional elbow molds with multiple fingers are used to accommodate material bunching, then manufacturing capability is improved, but material accumulation and crease formation worsen
Solution Approach 1:
The patent replaces the traditional multi-finger mold design with a streamlined mold featuring radiused corners and smooth curved surfaces that guide material flow evenly, eliminating the finger-like protrusions that caused material bunching and crease formation while maintaining molding capability
4Adaptability or versatility
If multiple metal types are used in different pipe sections, then adaptability to different pipe portions is improved, but non-uniformity and maintenance complexity increase
Solution Approach 1:
The patent creates a universal mold design that can form elbow jackets from harder metals suitable for all pipe sections, eliminating the need for different metal types in different locations and thereby reducing maintenance complexity while maintaining adaptability through the versatile mold configuration
Data Source
AI summary
An improved protective jacket for insulated, angled pipe includes a metal jacket having a first portion and a second portion, each portion having a generally semi-circular cross-section, and including two or more fingers. Each of the fingers defines a fillet at a junction of the fingers and a baseline of the jacket. The fingers include a flat face at an inner angle and curve from the flat face to a superior surface of the jacket. A first finger is formed a minimum distance of about 0.5 inches from a second finger, and a width of the fingers is created by an isosceles triangle with a radius of curvature between about 0.3 inches and 0.5 inches.