Nozzle Tips with Tangential Flow Channels for Resin Scouring
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Solution Overview
Problem
Conventional nozzle tips for injection molding and other applications often suffer from 'dead spots' where resin accumulates, leading to inefficient cleaning processes and potential contamination when switching between different resins, resulting in costly and time-consuming procedures to ensure purity and consistency.
Innovation Solution
The design of a nozzle tip with a central flow channel branching into non-intersecting, tangentially extending exiting flow channels, featuring a tapering and branching portion that minimizes resin accumulation by promoting continuous flow and reducing the likelihood of resin entrapment, thereby eliminating the need for extensive cleaning between resin changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional nozzle tip structures with multiple planes and creases are used, then resin can be effectively delivered through the nozzle, but dead spots are created where resin accumulates and builds up
Solution Approach 1:
The nozzle tip structure replaces two-dimensional creases and three-dimensional corners with curved surfaces and rounded transitions. The flow path features smooth curves instead of sharp angles, eliminating pocket-like structures where resin could accumulate. This curvature principle ensures continuous flow without dead spots while maintaining effective resin delivery.
Solution Approach 2:
Instead of designing the nozzle tip with traditional multi-plane structures that create creases and corners, the invention inverts the approach by using single-plane surfaces with curved transitions. The flow path is designed to avoid intersections and pockets by maintaining a streamlined, uninterrupted geometry that prevents resin accumulation.
2Reliability
If extensive cleaning procedures are performed to remove accumulated resin, then contamination is prevented, but the nozzle becomes unavailable and additional labor and time are required
Solution Approach 1:
The nozzle tip design enables self-cleaning through its geometry. The streamlined flow path with curved surfaces and no dead spots allows resin to flow through continuously without accumulating. This design inherently prevents contamination without requiring external cleaning interventions, maintaining both resin purity and nozzle availability.
Solution Approach 2:
The nozzle tip is designed beforehand to prevent resin accumulation through its geometry. By incorporating curved surfaces and eliminating creases from the start, the design preemptively avoids the formation of dead spots, eliminating the need for subsequent cleaning actions to maintain resin purity.
3Ease of manufacture
If flushing with additional resin is used to clear old resin, then cleaning is avoided, but resin materials are wasted and flushing completion is difficult to determine
Solution Approach 1:
The nozzle tip design prevents resin accumulation through its geometry, eliminating the need for flushing operations. The streamlined flow path with curved surfaces ensures continuous resin flow without dead spots, preventing contamination without wasting resin materials or requiring complex flushing procedures.
Solution Approach 2:
The nozzle tip is designed beforehand to prevent resin accumulation through its geometry. By incorporating curved surfaces and eliminating creases from the start, the design preemptively avoids the formation of dead spots, eliminating the need for subsequent flushing actions that would waste resin materials.
4Adaptability or versatility
If conventional nozzle tip structures with creases and corners are used, then resin can be delivered through multiple flow streams, but resin gets trapped in pockets and corners
Solution Approach 1:
The nozzle tip uses curved surfaces and rounded transitions throughout the flow path, replacing two-dimensional creases and three-dimensional corners. This curvature eliminates pocket-like structures where resin could accumulate while maintaining the ability to deliver resin through multiple flow streams via curved branching channels.
Solution Approach 2:
Instead of using traditional multi-plane structures with creases to create flow streams, the invention inverts the approach by using single-plane surfaces with curved transitions. The flow streams are created through curved branching from a central channel, avoiding intersections and pockets that would trap resin.
Data Source
AI summary
The invention relates to nozzle tips including a nozzle body and a tip portion, configured to minimize the accumulation of a resin on the nozzle tip as it is dispensed through the nozzle tip. The nozzle tip can contain a central flow channel and an internal portion that branches and guides the resin into multiple exiting flow channels that define tangential pathways to the outer surface of the nozzle tip. The nozzle tip can include grooves that define extended, sharply angled flow paths for the resin.Nozzle tips can have a neck portion separating a nozzle body and a tip end of the nozzle tip; here, a doughnut-shaped space located around the neck portion can be defined by the base of the nozzle, the crown of the nozzle, and the neck portion, for encouraging turbulent flow of the resin to scour the nozzle tip during dispensing.