Variable Extrusion Die Swivel Core Mechanism
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Solution Overview
Problem
Existing extrusion molding methods are limited in producing products with variable cross-sectional shapes, as they require constant cross-sectional extrusion nozzles, making it difficult to manufacture complex shapes like a vehicle door frame without significant tooling and investment.
Innovation Solution
A variable extrusion die apparatus with a swivel core rotatably installed in the extrusion nozzle, allowing the cross-sectional shape of the nozzle to be varied by rotation, enabling the production of products with varying cross-sectional shapes while maintaining the existing die configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a constant cross-sectional extrusion nozzle is used, then the extrusion process is simple and stable, but the product cross-sectional shape cannot be varied
Solution Approach 1:
The patent applies the dynamics principle by making the extrusion nozzle rotatable around its central axis. The nozzle is no longer fixed in orientation but can dynamically change its rotational position, allowing the extruded product's cross-sectional shape to vary continuously. This dynamic rotation capability transforms a static extrusion system into a versatile one that can produce different cross-sectional profiles without changing the nozzle itself.
Solution Approach 2:
The extrusion nozzle is segmented into multiple functional parts: a cylindrical body portion, a separate rotation mechanism, and a die opening. This segmentation allows the nozzle to be rotated independently while maintaining structural integrity, enabling variable cross-sectional shaping without redesigning the entire nozzle assembly.
2Adaptability or versatility
If the extrusion nozzle shape is changed to produce variable cross-section products, then product design flexibility increases, but new tooling development and investment are required
Solution Approach 1:
The patent implements universality by designing a single extrusion nozzle that can perform multiple functions through rotation. Instead of requiring different nozzles for different cross-sectional shapes, one universal nozzle can produce various profiles by changing its rotational orientation during extrusion. This eliminates the need for multiple specialized tooling pieces and reduces development costs.
Solution Approach 2:
The invention changes the operational parameter of the extrusion nozzle from fixed orientation to variable rotation angle. By controlling the rotation parameter, the same physical nozzle produces different cross-sectional shapes in the extruded product. This parameter-based approach avoids the need for manufacturing new nozzles for each product variant.
3Adaptability or versatility
If a swivel core is added to vary the nozzle cross-section, then the existing die can be maintained, but the device complexity increases
Solution Approach 1:
The swivel core is nested inside the extrusion nozzle, with the core rotating within the nozzle's cylindrical body. This nested configuration allows the variable cross-section function to be integrated within the existing die structure without requiring external additions or complex mounting mechanisms, thereby minimizing overall device complexity.
Data Source
AI summary
A variable extrusion die apparatus includes a first die into which an extrusion material is injected. A second die is coupled to the first die and has an extrusion nozzle having a shape corresponding to a cross section of an extrusion product. A swivel core is rotatably installed in the extrusion nozzle, wherein a cross section of the extrusion nozzle is varied by rotation of the swivel core.