3D Multi-Channel Melt Conductor for Extrusion Die
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Solution Overview
Problem
Existing melt conductors in extrusion facilities face challenges with increasing dimensions, leading to elevated pressure and shear stresses, which limit the construction and dimensioning of extruding dies, especially when producing products with small extrusion cross-sections, and result in uneven distribution or mixing of polymer melts.
Innovation Solution
A melt conductor with a multi-channel system arranged three-dimensionally within a block, featuring branchings and levels of melt channels that adjust cross-sectional areas and numbers to maintain constant shear stresses and ensure even distribution or mixing, utilizing additive manufacturing for enhanced geometric complexity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the dimensions of melt conductors are increased to handle larger extrusion volumes, then the productivity is improved, but the pressure and shear stresses increase excessively
Solution Approach 1:
The melt conductor is divided into multiple separate melt conductor elements arranged in parallel, each handling a portion of the total melt flow. This segmentation allows the system to achieve high productivity through combined capacity while each individual element maintains manageable dimensions and stress levels.
Solution Approach 2:
The invention transitions from a single large-scale melt conductor to a multi-element parallel arrangement, effectively adding a spatial dimension to the system architecture. This dimensional change enables scaling of productivity without proportionally increasing stress in any single component.
2Productivity
If the dimensions of melt conductors are increased, then the productivity is improved, but the construction and dimensioning become limited
Solution Approach 1:
The system is segmented into standardized melt conductor elements that can be independently designed and manufactured. This modular approach simplifies construction and dimensioning by breaking down a complex large-scale problem into manageable, repeatable units.
Solution Approach 2:
The melt conductor elements are designed as universal, interchangeable components that can be used in various configurations. This universality simplifies construction and dimensioning by allowing the same basic element to serve multiple functions and positions in the extrusion system.
3Productivity
If the dimensions of melt conductors are increased, then the productivity is improved, but the distribution or mixing of polymer melts becomes uneven
Solution Approach 1:
By dividing the melt conductor into multiple separate elements, each element can be optimized for uniform melt distribution and mixing independently. This segmentation ensures that even at high productivity levels, each individual channel maintains precise control over melt flow characteristics.
Solution Approach 2:
Each melt conductor element can be independently designed with specific geometric features optimized for uniform distribution and mixing. This local optimization ensures that quality parameters such as melt uniformity are maintained in each segment, which collectively achieves high overall productivity without sacrificing precision.
Data Source
AI summary
The invention relates to a melt conductor (1), in particular a melt distributor or melt mixer, for an extruding die (2) of an extrusion facility (3), comprising a melt conductor block (4) with a multi-channel system (5), the multi-channel system (5) being arranged inside the melt conductor block (4) with three-dimensional extension and having at least one input (6) and at least one output (7) for polymer melt, between one input (6) and one output (7) fluidically connected to the input (6) several branchings (8) arranged in series and several levels (9a) of sub-branches (10) being formed over several levels (12a, 12b) of divided melt channels (11a, 11b); with m melt channels (11a) of the ath level (12a) with Xth local cross-sections and n melt channels (11b) of the bth level (12b) with yth local cross-sections being present, wherein n>m if b>a, the yth local cross-sections of the melt channels (11b) of the bth level (12b) being smaller than the Xth local cross-sections of the melt channels (11a) of the ath level (12a). The invention further relates to an extruding die, an extrusion facility and to a method of operating the extrusion facility.