Application Nozzle With Segmented Filler For Low-Height Adhesive Strand
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Solution Overview
Problem
Existing order nozzles for applying viscous materials to workpieces often result in material strands with excessive height, which can hinder the stable pressing of workpieces together, especially when using adhesives.
Innovation Solution
The order nozzle incorporates at least one filler in the order channel that extends up to the material outlet opening, creating a partly hollow material strand with cavities that can be surrounded by the ring material strand or open to its surface, facilitating easier compression and flattening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a conventional round nozzle with a circular material outlet opening is used, then the material strand has an approximately circular cross-section with sufficient width, but the material strand height becomes excessively high
Solution Approach 1:
The application channel cross-section is segmented by filler bodies to create multiple flow paths. Instead of a single circular outlet, the channel is divided into several smaller flow paths that merge at the outlet, producing a material strand with reduced height while maintaining adequate width for effective adhesive application.
Solution Approach 2:
The filler bodies create local variations in the application channel geometry, narrowing the channel in specific regions to control material flow distribution. This local modification of channel geometry ensures that material is distributed across multiple flow paths, resulting in a flattened strand profile suitable for workpiece joining.
2Stability of the object's composition
If the material strand height is reduced by compressing it, then the workpiece stability improves, but the required pressing force increases
Solution Approach 1:
The filler bodies pre-shape the material strand during extrusion, creating a flattened profile before the material contacts the workpiece. This preliminary shaping action reduces the subsequent compression required during pressing, thereby lowering the pressing force needed while still achieving stable workpiece joining.
3Length of moving object
If the application channel cross-section is narrowed to reduce material strand height, then the material flow resistance increases
Solution Approach 1:
Instead of creating a single narrow channel, the filler bodies divide the channel into multiple parallel flow paths. This segmentation maintains adequate flow cross-sectional area while achieving the desired strand height reduction, thereby preventing excessive pressure build-up in the dosing system.
Data Source
Figure 1a~1c
Figure 2a~3d
AI summary
The invention relates to an application nozzle (10) for applying a viscous material to workpieces (44), comprising a nozzle body (12) and an application duct (18) for the viscous material, said duct extending inside the nozzle body (12) from a material inlet opening (14) to a material outlet opening (16). According to the invention, at least one filler element (28) is located in the application duct (18), which filler element constricts the cross-section of the application duct (18) and extends from a first end (30) remote from the material inlet opening (14) to a second end (32) at the material outlet opening (16).