Concrete Pipe Section With Hybrid Plastic Joint Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The production of prefabricated concrete parts for shafts, particularly sewage shafts, faces challenges in cost-effectiveness and thermal expansion issues when using thermoplastic and thermosetting plastics for lining and molded parts, respectively, especially for complex components with large diameters.
Innovation Solution
A prefabricated part with a thermoplastic lining and a thermosetting plastic molded part, connected via a thermoplastic strip with fasteners, where the lining and molded part overlap for a tight seal, and anchoring elements like bonding bridges are used to secure the connection, allowing for efficient and economical production and reduced thermal expansion issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complex component (molded part) is produced from thermoplastic material, then the production cost increases due to expensive injection molds, but the component can be produced with high precision
Solution Approach 1:
The patent uses composite materials by combining thermosetting plastic (for the molded part requiring precision) with thermoplastic lining (for cost-effective production). The molded part is produced from thermosetting plastic using less expensive molding methods rather than expensive thermoplastic injection molding, while maintaining manufacturing precision through the properties of thermosetting materials.
2Ease of manufacture
If a complex component is produced from thermoplastic material, then the production cost increases, but the production process becomes more complex due to temperature control requirements
Solution Approach 1:
The patent changes the material parameter by using thermosetting plastic instead of thermoplastic for the molded part. Thermosetting plastics have much lower coefficients of thermal expansion than thermoplastics, which eliminates the need for complex temperature control during storage and processing, thereby simplifying the production process.
3Ease of manufacture
If thermoplastic lining is used, then the production cost is low due to simple extrusion process, but the component is susceptible to thermal expansion
Solution Approach 1:
The patent segments the prefabricated part into two distinct components: a thermoplastic lining (produced by simple extrusion at low cost) and a thermosetting plastic molded part (providing thermal stability). This segmentation allows each component to fulfill its specific function - the lining provides cost-effective coverage while the molded part provides dimensional stability.
Solution Approach 2:
The patent creates a composite structure combining thermoplastic and thermosetting plastic materials. The thermoplastic lining maintains low production costs through extrusion, while the thermosetting plastic molded part compensates for thermal expansion issues, achieving both cost-effectiveness and thermal stability.
4Ease of manufacture
If thermosetting plastic is used for molded parts, then the production cost decreases and thermal expansion is reduced, but the connection between lining and molded part becomes more complex
Solution Approach 1:
The patent merges the thermoplastic lining and thermosetting plastic molded part into a unified sealed connection. The lining is sealed to the molded part in an overlap area, creating an integrated structure that simplifies the overall assembly while maintaining the advantages of both materials.
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 combination enables the production of cost-effective, thermally stable prefabricated parts with a tight seal, reducing production costs and minimizing size deviations due to thermal expansion, while ensuring a secure connection between the lining and the concrete body.
Implementation Method 1
the lining and the molded part are connected to one another in a sealed manner
Implementation Method 2
the lining and the molded part overlap one another in an overlap area extending along the inner side of the molded part
Data Source
AI summary
A prefabricated part comprises a concrete body that has the form of a pipe section with two pipe ends and a pipe inner side. The pipe inner side is lined at least in some areas by a lining made of plastic material connected to the concrete body, and at least one of the pipe ends is covered at least in some areas by a molded part made of plastic material connected to the concrete body. At least the pipe end, which is covered at least in some areas, has a connecting joint in order to connect the pipe end to a pipe end of a further prefabricated part. The lining consists of a thermoplastic material and the molded part consists of a thermosetting plastic. The lining and the molded part are connected to each other in a sealed manner.