Rotating Die Flange Structure for Extrusion Leakage Control
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Solution Overview
Problem
Existing extrusion and pultrusion devices face issues with leakage at the junction of rotating die side walls and opposing channel portion side walls, compromising production efficiency and quality.
Innovation Solution
The device incorporates flange portions on the rotating die side walls with recesses and additional leakage strategies to control material flow, ensuring it does not reach the junction, combined with geometric differences between channel sections to manage pressure effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotating die side walls are positioned close to the opposing channel portion side walls to maintain high production speed and quality, then productivity and manufacturing precision are improved, but material leakage occurs at the junction between the rotating die side walls and channel portion side walls
Solution Approach 1:
The rotating die side walls are divided into distinct portions: a mid-portion that contacts the material and exerts pressure, and flange portions at the ends that extend radially outward to contact the channel portion side walls. This segmentation allows the mid-portion to maintain close spacing for high productivity while the flange portions provide leakage protection by sealing the junction areas.
Solution Approach 2:
The flange portions act as intermediary elements between the rotating die and the channel portion side walls. These flange portions extend radially outward to contact and seal against the channel portion side walls, preventing material leakage at the junction without requiring the entire rotating die to be positioned closer to the channel walls, thus maintaining both productivity and preventing leakage.
2Manufacturing precision
If the rotating die exerts high pressure onto the material surface to maintain shape and imprint quality, then manufacturing precision is improved, but material may escape through gaps at the side wall junctions
Solution Approach 1:
The rotating die is segmented into a pressure-exerting mid-portion and sealing flange portions. The mid-portion maintains close spacing to the channel walls to ensure high manufacturing precision through effective pressure application, while the flange portions extend radially to seal the junctions and prevent material escape despite the high pressure applied by the mid-portion.
Solution Approach 2:
Different portions of the rotating die have different functions: the mid-portion is designed for pressure application and shape formation, while the flange portions are designed for sealing and leakage prevention. This local differentiation of quality and function allows the system to simultaneously achieve high manufacturing precision through pressure while preventing material leakage through localized sealing at the junctions.
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 design significantly reduces leakage, maintains high production speed and quality, and allows for diverse material processing, including heterogeneous materials and patterns, while minimizing oscillation issues.
Implementation Method 1
the rotating die is rotatable about an axis extending across the production direction and arranged to allow the outer circumferential surface to, while the rotating die rotates, exert a pressure onto a surface of the material when fed through the profile definition zone
Data Source
AI summary
An extrusion- or pultrusion device for forming a profile product in a production direction comprises a rotating die having two opposite first and second side walls and an outer circumferential surface there between, wherein the rotating die comprises a first side portion in connection to the first side wall and a second side portion in connection to the second side wall and a mid-portion extending between the first and second side portions, wherein the first and/or second side portions comprises first and second flange portions extending in a radial direction with an extension greater than a radial extension of at least a part of the mid-portion.