Induction Welding Plastic Pipe Connector Delamination
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Solution Overview
Problem
Existing methods for connecting line connectors to plastic fluid-carrying motor vehicle pipelines are prone to delamination and inadequate chemical protection, particularly in multi-layer pipelines, and fail to effectively shield pipe ends from corrosive influences.
Innovation Solution
A method involving induction welding, where a conductivity element heats the plastic pipe end to melt and weld it to the receiving shaft's walls, using an electromagnetic alternating field, ensuring a strong and chemically resistant connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional connection methods are used to connect line connectors to plastic pipelines, then the connection process is simple, but the pipe ends are exposed to damage and delamination occurs in multi-layer pipelines
Solution Approach 1:
The patent replaces conventional mechanical connection methods with electromagnetic induction welding. A conductivity element (metal ring or foil) is placed in the receiving shaft, and electromagnetic induction heats the plastic pipe end and conductivity element to melt and fuse them together, creating a reliable, delamination-free connection while maintaining process simplicity
Solution Approach 2:
The invention uses a composite structure consisting of the plastic pipeline, the conductivity element (metal or conductive plastic), and the receiving shaft. This composite design allows the conductivity element to be heated by electromagnetic induction and transfer heat to the plastic, achieving reliable welding without delamination
2Ease of manufacture
If conventional connection methods are used, then the connection process is straightforward, but the pipe ends are not adequately protected against chemical influences such as salt solutions
Solution Approach 1:
The invention performs preliminary protection by inserting the conductivity element into the receiving shaft before connecting the pipeline. The electromagnetic induction welding process simultaneously creates the mechanical connection and seals the pipe end within the receiving shaft, providing preliminary protection against chemical corrosion before the pipeline is exposed to harsh environments
Solution Approach 2:
The receiving shaft acts as an intermediary protective structure that seals the pipe end. The electromagnetic induction welding process fuses the pipe end to the receiving shaft walls, creating a chemically resistant barrier that protects the pipe end from salt solutions and other corrosive substances
3Reliability
If induction welding is used to connect the pipeline, then delamination is prevented and chemical protection is improved, but the device complexity increases due to the conductivity element and electromagnetic induction system
Solution Approach 1:
The conductivity element serves multiple functions simultaneously: it acts as a heating element for electromagnetic induction, provides structural support during welding, and can serve as a sealing element. This self-service approach reduces overall system complexity by eliminating the need for separate heating devices, structural supports, and sealing components
4Reliability
If induction welding is used to melt and weld the pipe end, then a stable and chemically resistant connection is achieved, but energy consumption increases due to electromagnetic induction heating
Solution Approach 1:
The electromagnetic induction heating is applied locally only to the pipe end region that needs to be welded, rather than heating the entire pipeline. The conductivity element is positioned precisely in the receiving shaft to concentrate the electromagnetic energy where it is needed, reducing overall energy consumption while achieving reliable local welding
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 method provides a stable, chemically resistant, and mechanically durable connection that prevents delamination and protects against corrosive influences, while maintaining a contamination-free flow channel at low costs.
Implementation Method 1
at least one conductivity element which is arranged in or on the receiving shaft and is heated by electromagnetic induction
Implementation Method 2
at least plastic regions of the pipe end melting as a result of this heating, so that the pipe end is welded to the wall or walls of the receiving shaft
Data Source
Figure 1
Figure 2
AI summary
A method for connecting a pipe connector (1) to a fluid-carrying motor vehicle pipeline (2), wherein the pipeline (2) is made of plastic. A pipeline end (6) of the pipeline (2) is inserted into a receiving shaft (7) that extends around the circumference of the pipe connector (1). At least one metal element (10) is arranged in or on the receiving shaft (7). The metal element (10) is heated by electromagnetic induction, and as a result of this heating, at least plastic areas of the pipeline end (6) melt, so that the pipeline end (6) is welded to the wall(s) of the receiving shaft (7).