Plastic Combination Barrel Fusion Welding for Vapor Pressure Stability
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Solution Overview
Problem
Existing combination drums used for transporting and storing harsh chemicals face issues with deformation due to vapor pressure changes, instability, and the need for metal resistance, which complicates compliance with safety guidelines, especially when metal materials are undesirable.
Innovation Solution
A combination keg composed of two plastic barrel parts connected via complementary conical areas, welded together using a fusion welding process, ensuring a secure, lightweight, and stable structure that meets safety requirements without using metal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal barrels are used to provide structural strength and resistance to harsh chemicals, then the strength and chemical resistance are improved, but the weight increases and handling becomes more difficult
Solution Approach 1:
The invention uses a composite structure consisting of an inner plastic barrel and an outer plastic barrel, creating a combination drum that achieves the strength and chemical resistance typically associated with metal barrels while maintaining the weight advantages of plastic materials. The nested dual-barrel design provides structural reinforcement without using metal.
Solution Approach 2:
The outer barrel is divided into two separate plastic parts that are joined together, creating a segmented structure that enhances overall strength and rigidity. This segmentation allows the plastic structure to better resist deformation from vapor pressure changes while remaining lightweight.
2Weight of moving object
If simple plastic barrels are used to reduce weight and improve handling, then the weight and ease of handling are improved, but the barrels deform when vapor pressure changes occur
Solution Approach 1:
The nested dual-barrel composite structure provides dimensional stability while maintaining lightweight properties. The outer barrel's segmented design with joined parts resists deformation from vapor pressure changes, preventing the barrel from collapsing or changing shape during transport and storage.
Solution Approach 2:
Dividing the outer barrel into two joined parts creates a more rigid structure that better resists deformation. The segmentation provides structural reinforcement that maintains shape stability under varying pressure conditions while keeping the overall weight low.
3Stability of the object's composition
If metal barrels are used to ensure stability under pressure changes, then the shape stability is improved, but the barrels cannot be used for certain chemical applications where metal is undesirable
Solution Approach 1:
The all-plastic composite structure combines the chemical compatibility and lightweight advantages of plastic with the structural stability traditionally provided by metal. Both the inner and outer barrels are made of plastic materials that are resistant to harsh chemicals, making the combination drum suitable for a wider range of chemical applications.
Solution Approach 2:
The segmented outer barrel design provides the structural stability needed to resist pressure changes without using metal. The joined plastic parts create a rigid structure that maintains shape stability while being fully compatible with harsh chemicals that would corrode metal barrels.
4Ease of manufacture
If the outer barrel is made from a single piece to simplify manufacturing, then the manufacturing complexity is reduced, but the structural strength and resistance to deformation are compromised
Solution Approach 1:
The outer barrel is intentionally divided into two parts that are joined together. This segmentation provides structural reinforcement and rigidity that a single-piece barrel of the same weight would not achieve, while still maintaining relative manufacturing simplicity through the use of standard plastic joining techniques.
Solution Approach 2:
The composite structure of nested barrels with the outer barrel divided into joined parts creates a synergistic effect where the combination of elements provides greater structural strength than a simple single-piece design, while remaining manufacturable using conventional plastic processing methods.
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 all-plastic combination keg provides stability and safety compliance while being lighter and easier to handle, meeting UN guidelines for the transport and storage of dangerous goods without the need for metal, ensuring the outer shape remains unchanged and secure.
Implementation Method 1
the first and the second keg part are welded to one another at the connection area
Data Source
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AI summary
The invention relates to a combination drum (10, 100, 200) comprising an outer drum (14) and an inner drum (12), wherein the outer drum (14) has a first drum part (20, 102, 202) and a second drum part (22, 104, 204). The two drum parts (20, 22, 102, 202, 104, 202, 204) are firmly connected to each other in a connecting area. Both the inner drum (12) and the outer drum (14) are made of a plastic. The invention further relates to a method for manufacturing such a combination drum (10, 100, 200).