Pipeline Coating Die Venting With Porous Inserts
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Solution Overview
Problem
Existing dies for casting pipeline coatings face challenges in efficiently filling polymer material with high density and preventing air bubble formation, leading to weakened protective coatings that fail quality controls, requiring complex designs and controls.
Innovation Solution
A die with a tubular wall, centering devices, and vent openings with porous inserts allows for gradual filling and air expulsion, using elastic annular walls to adapt to irregularities and facilitate air escape, ensuring easy assembly and quick filling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a die is used to inject polymer material into the tubular joint portion, then the protective coating can be applied efficiently, but air bubbles may form and weaken the coating quality
Solution Approach 1:
The patent incorporates porous inserts within the die structure that allow trapped air bubbles to escape during the polymer injection process. These porous materials provide controlled pathways for air evacuation while preventing polymer material leakage, thereby eliminating air bubbles that would otherwise create defects and weaken the protective coating quality.
2Manufacturing precision
If complex dies with multiple controls are used to prevent air bubbles, then coating quality can be maintained, but device complexity increases
Solution Approach 1:
The patent uses simple porous inserts rather than complex control systems to prevent air bubble formation. These porous elements passively facilitate air escape through their inherent pore structure, eliminating the need for sophisticated valves, sensors, or control mechanisms while maintaining coating uniformity and quality.
3Productivity
If high density polymer material is injected quickly, then productivity increases, but air bubbles are trapped and coating quality decreases
Solution Approach 1:
The porous inserts are strategically positioned within the die to provide continuous air escape pathways during rapid polymer injection. As high-density polymer material is injected at high speed, the porous structures allow trapped air to vent progressively, preventing bubble formation even during fast injection processes and maintaining coating uniformity.
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 die enables simple and cost-effective air expulsion while maintaining polymer material inside, ensuring a robust and uniform protective coating by preventing air bubbles and adapting to pipeline irregularities.
Implementation Method 1
Each vent opening (13) comprises a hole made in the tubular wall (10) and an insert (25) of porous material, which is configured to allow the air to pass and stop the flow of the polymer material.
Data Source
AI summary
A die for casting junctions of a coating of a pipeline is configured to be coupled to the pipeline to form an annular shaped closed compartment about a tubular joint portion comprising a tubular wall, which extends about a designated axis; a plurality of centering devices configured to align the axis of the tubular wall with a longitudinal axis of the pipeline; two annular walls arranged respectively at the opposite ends of the tubular wall; and two pluralities of vent openings arranged along the tubular wall respectively at each of the annular walls; and at least one feeding port configured to supply polymer material into the closed compartment.