Movable Mold System for Uniform Pipe Insulation
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Solution Overview
Problem
Conventional molding systems are inadequate for applying insulation to long metal pipes, such as those used in subsea oil and gas pipelines, as they fail to ensure uniform coverage and withstand high temperatures and pressures effectively.
Innovation Solution
A molding system with a movable mold and dynamic support mechanism that allows for the application of moldable material to the entire length of a pipe, featuring a controller to manage stress relief during curing and an elongate vent for horizontal filling and expansion, along with retractable support mechanisms to ensure a seamless coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional molding systems are used to apply insulation to long metal pipes, then the insulation application process is simple, but uniform coverage and effectiveness in withstanding high temperatures and pressures cannot be ensured
Solution Approach 1:
The molding system is divided into multiple independent components: a movable mold divided into first and second end portions, a retractable support mechanism with injector, and a controller. This segmentation allows each component to perform its specific function independently, achieving uniform insulation coverage through coordinated operation while maintaining manageable system complexity through modular design
Solution Approach 2:
The mold is designed to be movable rather than fixed, allowing it to move along the pipe during the molding process. The support mechanism is also made retractable, enabling it to pull back after injecting insulation material. These dynamic elements ensure continuous contact and uniform coverage along the entire pipe length while adapting to the molding process requirements
2Manufacturing precision
If a movable mold and dynamic support mechanism are used to ensure uniform coverage, then insulation uniformity improves, but the device complexity increases
Solution Approach 1:
The retractable support mechanism serves multiple functions: it supports the pipe during the molding process, injects insulation material through its integrated injector, and then retracts to allow mold movement. This multi-functionality reduces the need for separate components, achieving uniform insulation coverage while limiting the increase in overall device complexity
Solution Approach 2:
The retractable support acts as an intermediary between the mold and the pipe, facilitating the molding process by providing temporary support and then allowing the mold to move freely. This intermediary role enables precise insulation application without requiring complex direct mold-to-pipe contact mechanisms
3Manufacturing precision
If the mold is moved to apply insulation along the entire pipe length, then coverage completeness improves, but stress on the pipe during demolding increases
Solution Approach 1:
The controller is configured to move the mold along the pipe before the insulation material fully cures, applying pressure to ensure complete coverage. The support mechanism is then retracted to release the mold from the pipe surface. This preliminary action sequence ensures complete insulation coverage while minimizing stress during demolding by avoiding prolonged confinement of the curing material
4Stress or pressure
If the support is made retractable to enable mold movement, then demolding stress is reduced, but the ability to maintain pipe position during molding decreases
Solution Approach 1:
The support mechanism operates in periodic cycles: it extends to support the pipe and enable mold positioning, then retracts to allow mold movement and reduce stress. This periodic extension and retraction pattern maintains pipe position stability during the critical molding phase while eliminating stress during the demolding phase, achieving both requirements through time-separated action
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 system provides uniform insulation coverage along the entire length of pipes, effectively withstanding high temperatures and pressures, and minimizes stress on the pipe during demolding, ensuring a robust and reliable insulation solution for harsh environments.
Implementation Method 1
the moldable material in the mold cavity supports the pipe in the molding position
Implementation Method 2
the support is selectively movable relative to the mold along the support axis
Data Source
AI summary
A molding system for applying moldable material to a pipe. An elongate mold has at least one elongate mold member movable relative another elongate mold member between open and closed positions. The mold includes a pipe support that extends generally radially into a mold cavity along a support axis. An inner end of the support is configured to support the pipe in a molding position in which an annular portion of the mold cavity extends circumferentially around the pipe. After moldable material in the annular portion of the mold cavity can support the pipe, the support is withdrawn from the mold cavity by moving outwardly along the support axis. An injector selectively dispenses additional moldable material into a space formed by the support in the existing moldable material.