Layer Multiplication Device Flow Cavity Volume
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Solution Overview
Problem
Existing layer multiplication devices in multilayer film manufacturing introduce excessive shear forces and pressure drops, which can damage the film structure and cause layer blending, preventing the formation of well-defined multilayer stacks.
Innovation Solution
A layer multiplication device with an insert housing and layer multiplication insert that divides and recombines flow streams, configured to have a cavity flow volume greater than the inlet flow volume, reducing shear forces and pressure drops by maintaining or expanding the flow volume within the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a layer multiplication device divides and recombines flow streams to multiply layers, then the number of individual layers in the film is increased, but excessive shear forces and pressure drops are generated that can damage the film structure and cause layer blending
Solution Approach 1:
The flow stream is divided into multiple separate flow streams through division elements within the housing, allowing the multilayer structure to be split into discrete portions that can be independently controlled and then recombined, reducing shear forces during the multiplication process
Solution Approach 2:
Recombination elements are introduced as intermediary components that facilitate the gentle merging of divided flow streams. These intermediaries control the recombination process to minimize shear forces and prevent layer blending while achieving the desired multiplication effect
2Adaptability or versatility
If the flow cavity volume is reduced to accommodate the layer multiplication insert, then the device can perform layer multiplication, but the pressure drop across the device increases
Solution Approach 1:
The layer multiplication insert is nested within the housing in a space-efficient manner, with division and recombination elements arranged to maximize the utilization of available flow cavity volume while maintaining sufficient space to minimize pressure drop
Solution Approach 2:
The division and recombination elements are configured to operate in multiple spatial dimensions within the flow cavity, allowing complex flow manipulation without requiring excessive linear space, thereby maintaining adequate flow cavity volume to reduce pressure drop
3Manufacturing precision
If shear forces are reduced to prevent layer blending, then layer distinctness is maintained, but the device complexity increases
Solution Approach 1:
The housing integrates multiple functions including flow division, flow recombination, and shear force control into a single unified structure. The division and recombination elements serve dual purposes of multiplying layers and controlling shear forces, reducing overall device complexity while maintaining layer distinctness
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
A layer multiplication device (100) may include a housing (102A, 102B) and at least one layer multiplication insert (106) positioned inside the housing (102A, 102B). The housing (102A, 102B) may have an inlet (108) configured to receive a flow stream, an outlet (110) configured to discharge the flow stream, and a flow cavity (112) extending between the inlet (108) and the outlet (110). In operation, the layer multiplication insert (106) may divide an incoming flow stream so as to multiply the flow stream into at least a first flow stream and a second flow stream. In some examples, the inlet (108) provides an inlet flow volume equal to a cross-sectional area of the housing (102A, 102B) at the inlet (108) multiplied by a length of the flow cavity (112), the flow cavity (112) defines a cavity flow volume, and the cavity flow volume is equal to or greater than the inlet flow volume.