Sewer Pipe Element with Integrated Plastics Lining
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Solution Overview
Problem
Existing methods for manufacturing sewage pipe elements with plastics linings are complex and costly, as they require additional steps and increased time, leading to higher production costs.
Innovation Solution
A method involving a mould with an outer and inner shell, where the inner shell is formed from plastics material and remains connected to the concrete after setting, simplifying the manufacturing process and eliminating the need for an additional demoulding step, thereby reducing costs and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plastics material is sprayed directly onto a mould for forming a concrete element, then the plastics lining is applied, but additional method steps are required to provide portions of the mould with a plastics layer, increasing manufacturing time and costs
Solution Approach 1:
The inner shell serves dual purposes: it acts as both the mould component for forming the concrete element and as the final plastics lining of the sewage pipe element. This merging eliminates the need for separate plastics application steps and subsequent mould preparation, directly resolving the contradiction between achieving corrosion resistance and maintaining process simplicity
Solution Approach 2:
The inner shell is designed to perform multiple functions throughout the manufacturing process: it defines the mould cavity shape, provides the plastics lining material, and becomes part of the finished product. This multi-functionality eliminates additional steps required in conventional methods, reducing both complexity and manufacturing time while ensuring reliable corrosion protection
2Reliability
If a plastics inner pipe is introduced into a concrete pipe after the inner shell is removed, then the plastics lining is provided, but an additional step is required, making the manufacturing method more complex and longer
Solution Approach 1:
The plastics lining is prepared in advance as the inner shell before concrete pouring, rather than being added afterward. This preliminary action ensures the lining is already in position and properly configured before the concrete sets, eliminating subsequent installation steps and improving manufacturing efficiency while guaranteeing reliable corrosion protection
Solution Approach 2:
The mould inner shell and the final plastics lining are merged into a single component. The inner shell remains in place during concrete setting and becomes the permanent lining, eliminating the need for separate plastics pipe installation steps and significantly improving productivity
3Ease of manufacture
If the inner shell is removed from the concrete element, then the concrete structure is exposed, but an additional step is required and the plastics lining cannot be provided in-situ
Solution Approach 1:
The inner shell is designed to remain permanently attached to the concrete element, serving as both the mould wall and the final plastics lining. This merging eliminates demoulding operations while ensuring the plastics lining maintains its integrity and provides reliable corrosion protection throughout the service life of the pipe element
Data Source
AI summary
The present invention relates to a method for manufacturing a sewage pipe element comprising a plastics lining, the method comprising the following steps: providing a mould 2 for manufacturing the sewage pipe element, comprising a first sleeve 22 and a plastics element 20; introducing a concrete into the mould 2; attaching a second sleeve 28; demoulding the sewage pipe element; the first sleeve 22 being connected to the plastics element 20 and the plastics element 20 being connected to the second sleeve 28 in a fluid-tight manner in each case and forming at least part of the plastics lining.