Rotating Die Side Recesses for Leak-Resistant Pultrusion
Find Innovative SolutionsGenerate Solutions
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, leading to inefficiencies in material flow and product quality.
Innovation Solution
The device incorporates recesses in the side portions of the rotating die, reducing pressure and controlling material flow to prevent leakage, with features like recesses and flange portions strategically positioned to manage pressure differentials and material flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotating die is used in the second channel section, then high-speed production with maintained quality is achieved, but leakage occurs at the junction of rotating die side walls and opposing channel portion side walls
Solution Approach 1:
The patent applies local quality by creating recesses in specific locations (side portions) of the rotating die where leakage occurs. These recesses locally modify the pressure distribution only at the problematic junction areas, allowing the rest of the rotating die to continue functioning at high speed without compromising overall production efficiency.
Solution Approach 2:
The rotating die is segmented into different portions (mid-portion and side portions) with distinct functions. The side portions contain recesses specifically designed to address leakage, while the mid-portion maintains the primary shaping function. This segmentation allows targeted solutions for specific problems without redesigning the entire rotating die.
2Reliability
If recesses are added to the side portions of the rotating die, then leakage is reduced, but device complexity increases
Solution Approach 1:
Rather than redesigning the entire rotating die structure, the patent introduces simple recesses only in the specific side portions where leakage occurs. This localized modification minimizes the increase in device complexity while effectively addressing the leakage problem.
Solution Approach 2:
Instead of adding complex sealing mechanisms or tightening tolerances to prevent leakage, the patent inverts the approach by creating recesses that intentionally reduce pressure at the leakage points. This inverse solution simplifies the overall structure compared to traditional sealing approaches.
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
The solution effectively reduces leakage and maintains high-quality product formation by controlling material flow, ensuring consistent pressure and shape integrity during the extrusion process.
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 comprising 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 an recess extending in a radial direction with an extension being less than a radial extension of at least a part of the mid-portion.