Rotatable Nozzle Adhesive Applicator Humidity Barrier
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Solution Overview
Problem
Existing application devices for viscous adhesives, such as polyurethane-based adhesives, face challenges in preventing humidity ingress, which can lead to unwanted hardening, requiring complex equipment to manage ambient air humidity.
Innovation Solution
A rotatable nozzle application device with a separating agent chamber and dynamic seals, using a hydrophobic substance like lubricating grease to form a barrier against humidity, ensuring the adhesive remains effective and preventing hardening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex equipment is used to prevent humidity ingress, then reliability of adhesive application is improved, but device complexity increases
Solution Approach 1:
The application device is divided into separate functional components: a base body for adhesive supply and a rotatable nozzle body for application. This segmentation allows independent optimization of each component and simplifies the overall system while maintaining reliability through focused humidity protection at the critical interface.
Solution Approach 2:
A dynamic seal acts as an intermediary element between the base body and nozzle body, creating a reliable barrier against humidity ingress. The seal, combined with the rotatable connection, provides effective humidity protection without requiring complex enclosed systems, thus maintaining simplicity while ensuring adhesive reliability.
2Adaptability or versatility
If a rotatable nozzle is implemented, then adaptability of application direction is improved, but sealing against humidity becomes more difficult
Solution Approach 1:
The nozzle body is designed to rotate relative to the base body, enabling dynamic adjustment of application direction. This rotational freedom is combined with a dynamic seal that maintains reliable humidity protection during movement, thus achieving both adaptability and sealing performance through a dynamically designed interface.
3Reliability
If a separating agent chamber is added, then protection against humidity ingress is improved, but device complexity increases
Solution Approach 1:
The separating agent chamber is integrated into the existing structure of the application device, combining humidity protection functionality with the overall device architecture. This merging approach provides effective humidity barrier protection without adding significant structural complexity, as the chamber utilizes available space and interfaces with existing components.
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
The device effectively prevents humidity from reaching the adhesive, ensuring reliable application and hardening only where intended, while maintaining a simple and efficient equipment design.
Implementation Method 1
a first dynamic seal surrounding the base body, which rests with an inner side against an outer wall of the base body and with an outer side against an inner wall of the nozzle body
Implementation Method 2
A hydrophobic, preferably viscous, substance is used as the separating agent. A fat and/or an oil is preferably used as the separating agent, which forms a separating layer and thus a barrier to water, so that the separating agent in the separating agent chamber prevents or at least significantly slows the penetration of air with humidity through the sealing points of the first dynamic seal
Data Source
AI summary
An application device for a viscous adhesive comprising a base body having a first inlet for a viscous adhesive; and a nozzle body which is rotatable about an axis with respect to the base body and which surrounds a portion of the base body radially on the outside with respect to the axis, wherein, via the interaction of a first dynamic seal with a separating agent chamber, in which a separating agent is stored, the introduction of humidity into the adhesive before it exits the nozzle opening is effectively prevented.