Centrifugal Molding for Microstructured Surfaces
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Solution Overview
Problem
Existing methods for producing microstructures, such as molding techniques, injection molding, and hot embossing, face challenges in achieving high surface quality due to gas inclusions, which are difficult to remove, especially in the microscopic range, leading to impaired structure quality and requiring complex ventilation processes.
Innovation Solution
A centrifugation method where the impression material is filled into a container with a microstructured mold, subjected to high centrifugal forces to compress and degas the material, ensuring a constant layer thickness and pressing the material into the mold cavities, thereby displacing gas inclusions and achieving high-quality microstructures with minimal technical effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional molding techniques are used to produce microstructures, then the manufacturing process is simple, but gas inclusions occur and deteriorate surface quality
Solution Approach 1:
The patent changes the physical parameters of the molding process by applying centrifugal force instead of conventional gravity-based molding. This parameter change enables complete filling of micro-cavities while forcing gas inclusions to separate and escape, thereby achieving high surface quality without complex ventilation systems.
Solution Approach 2:
The centrifugal force applied during rotation creates dynamic conditions that prevent gas inclusions from remaining trapped in the molding material. The continuous motion and force application during the molding process effectively removes gas bubbles, improving surface quality while maintaining manufacturing simplicity.
2Manufacturing precision
If vacuum degassing is applied to remove gas inclusions, then surface quality improves, but production time increases and process complexity increases
Solution Approach 1:
The patent combines the molding and degassing operations into a single simultaneous process. The centrifugal force applied during molding itself drives gas inclusions to escape, eliminating the need for separate vacuum degassing steps and reducing both time and process complexity.
Solution Approach 2:
The degassing action is performed preliminarily during the molding process itself rather than as a subsequent step. The centrifugal force continuously removes gas inclusions as the material is being molded, preventing gas entrapment before it can affect surface quality.
3Manufacturing precision
If centrifugal force is applied to compress impression material, then gas inclusions are displaced and surface quality improves, but the layer thickness becomes non-uniform
Solution Approach 1:
The patent applies centrifugal force in a controlled manner that creates different pressure distributions at different locations. This local variation in force application allows complete filling of micro-cavities while maintaining uniform layer thickness through proper mold design and force distribution.
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 enables the production of microstructured surfaces with minimal gas inclusions, achieving high surface quality and reducing technical complexity by eliminating the need for vacuum devices, allowing for faster and more efficient production of microstructures with improved homogeneity and compactness.
Implementation Method 1
the container is centrifuged. The impression material is gradually compressed, starting from the bottom of the container in the direction of the container opening
Implementation Method 2
The impression material is cured to form the molded body with microstructures
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a method and a device for producing a molded body with microstructures from impression material. The method for producing a molded body with microstructures on a carrier made of impression material is carried out by introducing an impression material into a container (10) having an impression chamber (14), wherein at least one microstructured mold (12) is provided in the impression chamber (14). Furthermore, the container (10) is centrifuged until the impression material has completely penetrated the structure of the mold (12), and the impression material is cured to form a molded body with microstructures. The molded body with microstructures is then removed from the mold (12) and the container (10).A container (10) is provided in which the mold (12) is placed, and the container (10) is connectable to a centrifuge, wherein the container (10) has an impression chamber (14) for receiving the impression material, wherein the impression chamber (14) has at least one microstructured mold (12).