CNC Knitted Formwork for Complex Concrete Casting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing concrete casting methods for complex geometries are labor and material intensive, costly, and generate significant construction waste, while traditional textile formworks are limited in customization and require extensive post-processing.
Innovation Solution
Utilizing Computer Numeric Controlled (CNC) manufactured knitted formwork that dynamically interacts with fresh concrete, allowing for complex geometries and reducing waste through lightweight, customizable, and automated manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional textile formworks are used for concrete casting, then the formwork can be assembled from mass-manufactured textiles, but the customization capability is limited and extensive post-processing is required
Solution Approach 1:
The patent applies parameter changes by utilizing the rheological properties of fresh concrete (viscosity, flowability) to enable the concrete to dynamically interact with the knitted formwork during casting. This allows the formwork to adapt to complex geometries without extensive post-processing, as the concrete's flow characteristics enable it to conform to the formwork's shape during the casting process
Solution Approach 2:
The patent implements dynamics by allowing the knitted formwork to dynamically interact with the fresh concrete during casting. The formwork is not a rigid mold but a flexible structure that responds to the concrete's weight and hydrostatic pressure, enabling complex geometries to emerge during the casting process rather than being pre-defined by a rigid form
2Shape
If complex geometries are achieved using traditional casting methods, then the desired shapes can be obtained, but the process is labor and material intensive and generates significant construction waste
Solution Approach 1:
The patent uses a knitted formwork that functions as a flexible shell or thin film structure. This knitted fabric acts as a lightweight, adaptable form that can conform to complex geometries without requiring extensive material or labor. The flexibility of the knitted structure allows it to define complex shapes while minimizing material usage compared to traditional rigid formwork systems
Solution Approach 2:
The patent applies preliminary action by pre-engineering the knitted formwork with specific topological features (pockets, tethers, apertures) that guide the concrete's flow and pressure distribution during casting. This preliminary configuration of the formwork enables complex geometries to emerge naturally during casting without requiring extensive post-processing or additional materials
3Manufacturing precision
If CNC knitted formwork is used for casting, then complex geometries and finished surfaces can be achieved, but the manufacturing process requires advanced CNC knitting technology
Solution Approach 1:
The patent applies parameter changes by utilizing the rheological properties of fresh concrete (viscosity, flowability) to enable the concrete to dynamically interact with the knitted formwork during casting. This allows the formwork to adapt to complex geometries without extensive post-processing, as the concrete's flow characteristics enable it to conform to the formwork's shape during the casting process
Solution Approach 2:
The patent replaces traditional mechanical formwork systems with a knitted textile structure that uses the concrete's own weight and hydrostatic pressure as the forming mechanism. Instead of rigid mechanical molds that require precise manufacturing, the knitted formwork uses soft, adaptable textiles that conform to complex geometries through the dynamic interaction with flowing concrete
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
Enables cost-effective, efficient production of complex concrete structures with reduced waste by leveraging the dynamic interaction of CNC knitted formwork with concrete's rheological properties, achieving finished surfaces and complex geometries without extensive post-processing.
Implementation Method 1
the weight and hydrostatic pressure of the concrete
Implementation Method 2
deforming the flexible formwork with the casting material
Data Source
AI summary
A method of material casting includes knitting, by a computer-controlled knitting machine, a flexible formwork, where the flexible formwork defines a partially-closed shape having a plurality of topological features, filling the flexible formwork with a casting material, and deforming the flexible formwork with the casting material. In some cases, the method includes removing the casting material from the flexible formwork when the flexible formwork has imparted the shape on the casting material.