Monolithic Hot-Runner Apparatus Assembly Elimination
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Solution Overview
Problem
Conventional injection molding systems require time-consuming and costly assembly of individually fabricated components, leading to cumulative errors and inefficiencies in manufacturing.
Innovation Solution
The use of freeform fabrication processes to create unitary monolithic injection molding apparatuses, where components like mold plates, hot-runner manifolds, and nozzles are formed together in a single process, eliminating the need for assembly and allowing for more precise and cost-effective production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If components are fabricated individually and assembled, then manufacturing flexibility is maintained, but assembly time and cumulative errors increase
Solution Approach 1:
The patent combines multiple separately fabricated components (manifold, nozzles, sprue bushings, spacers, insulation components) into a single monolithically formed hot-runner assembly. This integration eliminates the need for assembly operations, thereby eliminating cumulative dimensional errors from multiple fabrication processes and eliminating assembly time entirely.
2Device complexity
If components are assembled from separate parts, then ease of repair is maintained, but device complexity and assembly cost increase
Solution Approach 1:
The patent merges multiple discrete components into a single monolithic structure formed by additive manufacturing. This reduces the total number of parts from dozens to one, eliminating assembly operations, reducing assembly labor costs, and simplifying quality control while maintaining ease of manufacture through the capabilities of additive manufacturing.
3Weight of moving object
If traditional fabrication methods are used, then manufacturing processes are well-established, but weight and material usage increase
Solution Approach 1:
The patent employs additive manufacturing technology to fundamentally change the manufacturing process parameters from traditional subtractive or formative methods. This enables the creation of optimized configurations with reduced material usage and weight, while the layer-by-layer fabrication process allows for complex internal geometries and optimized material distribution that traditional methods cannot achieve.
Data Source
Figure 1~2
Figure 3A~4
Figure 5~6B
AI summary
A unitary monolithically formed hot-runner apparatus having at least a manifold containment structure, a hot-runner manifold, at least one nozzle, and one or more spacers. In some embodiments, the manifold containment structure, hot-runner manifold, nozzle(s), and spacer(s) may be multi-material apparatuses of unitary monolithic construction. In other embodiments, a thermal expansion accommodation portion is provided for each nozzle to accommodate thermal growth. Each spacer may be formed of a material having a lower thermal conductivity than the materials of the hot-runner manifold and manifold containment structure and may be made to include a discontinuity to allow for thermal expansion.