Multi-Property Injection Molding Nozzle via Additive Manufacturing
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Solution Overview
Problem
Existing injection molding nozzles face challenges in maintaining consistent heat transfer, wear resistance, and uninterrupted melt flow due to disparate components that wear inconsistently and require precise fitting, making it difficult to create complex geometries that meet design and performance requirements.
Innovation Solution
The development of a multi-property injection molding nozzle with materials integrally layered to form a unitary structure, improving heat transfer, wear resistance, and melt flow by using additive manufacturing processes like direct metal laser sintering to fuse multiple materials with specific properties at predetermined locations, reducing the need for assembly joints and manufacturing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple discrete components are used to construct the nozzle, then assembly flexibility is improved, but wear consistency and heat transfer performance deteriorate
Solution Approach 1:
The patent merges multiple discrete nozzle components into a single monolithic nozzle body constructed from functionally graded materials. This integration eliminates the interfaces between components that cause inconsistent wear and heat transfer, while the FGM structure provides different material properties in different regions to maintain assembly flexibility and performance optimization.
Solution Approach 2:
The patent employs functionally graded materials (FGMs) that combine multiple materials with different properties in a continuous gradient structure. This allows the nozzle to have regions with different wear resistance, thermal conductivity, and mechanical strength properties, resolving the contradiction between assembly flexibility and wear consistency by providing both within a unified structure.
2Ease of manufacture
If multiple discrete components are assembled together, then manufacturing flexibility is improved, but manufacturing precision and assembly time worsen
Solution Approach 1:
The patent combines multiple nozzle components into a single monolithic structure manufactured using additive manufacturing. This eliminates the need for precise fitting and assembly of multiple parts, thereby improving manufacturing precision while maintaining the ability to create complex geometries through the additive manufacturing process.
Solution Approach 2:
The patent utilizes additive manufacturing technology to change the manufacturing approach from traditional subtractive or assembly-based methods. This enables the creation of complex internal geometries and functionally graded material structures with high precision in a single manufacturing step, resolving the contradiction between manufacturing flexibility and fitting precision.
3Device complexity
If traditional manufacturing processes are used, then manufacturing simplicity is maintained, but the ability to create complex geometries and optimize performance deteriorates
Solution Approach 1:
The patent changes the manufacturing process parameter from traditional subtractive manufacturing or assembly to additive manufacturing. This enables the creation of complex internal geometries, functionally graded material distributions, and optimized flow paths that cannot be achieved with traditional methods, while the additive process itself remains relatively simple and automated.
Solution Approach 2:
The patent employs functionally graded materials with complex spatial distributions of material properties that can only be created through additive manufacturing. The complex geometry and material gradient structure are integrated into a single manufacturing process, resolving the contradiction between manufacturing simplicity and geometry complexity.
4Ease of operation
If discrete components are used with joints, then assembly ease is improved, but melt flow continuity and surface quality worsen
Solution Approach 1:
The patent merges discrete nozzle components into a single monolithic structure, eliminating all joints and interfaces that cause melt flow interruptions and surface defects. The seamless internal geometry ensures continuous melt flow and high surface quality, while the component functions are integrated rather than assembled.
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
This approach enhances the operational durability and efficiency of the nozzle by ensuring consistent heat transfer and wear resistance, reducing manufacturing time, and enabling the creation of complex geometries that minimize surface vestiges and optimize melt delivery.
Implementation Method 1
a laser beam to heat and fuse the layers of metal powder together
Implementation Method 2
selective laser sintering (SLS) process
Data Source
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AI summary
Injection-molding nozzles having any one or more of improved heat transfer, wear resistance, and melt transfer from a manifold to a mold. The operation and durability of a nozzle can be improved by integrally layering multiple materials to create a multi-property nozzle that is a unitary, monolithic, and seamless structure. For example, the heat transfer properties of a nozzle is improved by integrally layering certain materials in the nozzle housing such that heat is more effectively dissipated or transferred throughout the nozzle to maintain and promote melt flow. One or more components of the nozzle can be merged and thus seamlessly formed to improve melt flow by reducing joints that would cause the melt to hang up within the nozzle and, concomitantly, reducing manufacturing and assembly time. The process used to unitarily form some or all of the nozzle may also be used to create complex geometric configurations therein.