Overturning Device for Molten Material Purging
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Solution Overview
Problem
Current extrusion devices require a time-consuming and wasteful purging process to change molten materials, leading to significant downtime and material waste, as old material sticks in melt channels and is difficult to remove.
Innovation Solution
An overturning device with a melt guiding system that rearranges molten material from the center to the edge and vice versa, allowing for automatic guidance without moveable parts, reducing purge time by ensuring old material is transported faster to the center for removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional purging method is used to change molten material in extrusion devices, then the material change can be completed, but the process is extremely time-consuming and generates significant material waste
Solution Approach 1:
The patent applies inversion by reversing the normal flow direction of molten material through the melt channel. During purging, the flow is redirected to move old material from the edge region (where it accumulates) back through the channel to the extrusion end, where it can be removed. This reverse flow mechanism dramatically accelerates the purging process compared to conventional methods that rely on slow displacement of stagnant material.
Solution Approach 2:
The patent introduces a reversing device as an intermediary component that actively controls and redirects the molten material flow. This device acts as a mediator between the extrusion system and the melt channel, enabling the flow reversal necessary for rapid purging without requiring complete system shutdown or manual intervention.
2Adaptability or versatility
If a conventional purging method is used to change molten material in extrusion devices, then the material change can be completed, but significant material waste occurs
Solution Approach 1:
By reversing the flow direction, the patent enables old material to be efficiently evacuated from the edge region back through the channel. This inversion allows for more complete removal of contaminated material with less waste, as the reverse flow actively pushes old material toward the extrusion end where it can be cleanly removed rather than allowing it to stagnate and mix with new material.
Solution Approach 2:
The patent maintains continuous material flow during the purging process through the reversing device. Instead of stopping production to purge, the system continuously moves material through the channel in reverse during purging operations, eliminating downtime and reducing the amount of material that must be discarded while maintaining production continuity.
3Adaptability or versatility
If molten material is transported through melt channels with complex distribution, then multiple products can be produced, but old material sticks in the edge region and is difficult to remove
Solution Approach 1:
The patent addresses the sticking problem by implementing flow reversal that actively moves stagnant material from the edge region back through the channel. This inversion of normal flow direction creates a flushing effect that dislodges and removes accumulated old material from areas where it would otherwise stagnate, making material removal much easier in complex distribution systems.
Solution Approach 2:
The reversing device operates periodically to alternate between normal extrusion mode and purging mode. During periodic purging cycles, the flow direction is reversed to clear accumulated material from edge regions, then returns to normal operation. This periodic action prevents material buildup and maintains ease of operation in complex melt channel configurations.
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 overturning device reduces purge time by up to 50%, minimizes material waste, and decreases thermal exposure to the material, enhancing production efficiency and reducing material impairments.
Implementation Method 1
The melt guiding means (40) serves for a rearrangement of molten material from the centre of the melt inlet (20) to the edge of the melt outlet (30). Further, the melt guiding means (40) is configured for a rearrangement of the molten material from the edge of the melt inlet (20) into the centre of the melt outlet (30).
Data Source
AI summary
The present invention relates to an overturning device (10) for overturning a molten material (200) in a melt channel (110) comprising a melt inlet (20) and a melt outlet (30), wherein between the melt inlet (20) and the melt outlet (30) at least one melt guiding means (40) is assembled for a rearrangement of molten material (200) from the centre (22) of the melt inlet (20) to the edge (34) of the melt outlet (30) and for a rearrangement of molten material (200) from the edge (24) of the melt inlet (20) into the centre (32) of the melt outlet (30).