Dispensing Nozzle Cap Separation via Ramp Mechanism
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Solution Overview
Problem
Existing nozzle and cap assemblies face difficulties in removing the cap from the nozzle after use, especially when the nozzle is contaminated with product, leading to potential material failure and increased costs due to the need for strong materials and complex thread designs.
Innovation Solution
The design incorporates an external ramp on the nozzle body that allows for relative separation between the cap and nozzle through rotation, eliminating the need for conventional screw threads and reducing material usage, enabling easy cap removal even when contaminated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional screw threads are used to secure the cap to the nozzle, then the cap can be held firmly in place, but the cap becomes difficult to remove when product contaminates the threads
Solution Approach 1:
The invention extracts the harmful threaded engagement mechanism and replaces it with a ramp-based separation system. The ramp surface allows the cap to be pushed off the nozzle by following the inclined plane, eliminating the thread contamination problem while maintaining secure attachment during use.
Solution Approach 2:
Instead of using threads that require rotational force for both attachment and detachment, the invention inverts the approach by using a ramp surface where a simple pushing motion in the longitudinal direction achieves both secure attachment and easy removal, reversing the traditional operational mechanism.
2Strength
If strong materials with thick walls are used to prevent material failure during cap removal, then the nozzle and cap can withstand substantial forces, but the material costs increase substantially
Solution Approach 1:
The invention replaces the mechanical thread engagement system with a ramp-based separation mechanism. This substitution allows for easier cap removal without requiring excessive force, thereby preventing material failure while using thinner-walled, less expensive plastic materials.
Solution Approach 2:
The invention changes the mechanical interaction parameters from threaded rotational engagement to ramp-based linear separation. This parameter change reduces the force required for cap removal, allowing the use of materials with lower strength specifications and thinner walls, thus reducing material costs.
3Ease of operation
If screw threads with low pitch are used to ease cap rotation, then the relative rotation is easier for the user, but the cap and nozzle still become bonded and difficult to remove
Solution Approach 1:
The invention extracts the threaded engagement mechanism entirely and replaces it with a ramp surface. This eliminates the problem of product contamination bonding the threads while maintaining ease of operation through the smooth inclined plane that guides cap removal.
Solution Approach 2:
The ramp surface acts as an intermediary between the cap and nozzle, providing a controlled separation path. This intermediary surface allows the cap to be easily pushed off without the bonding issues that occur with direct threaded engagement, especially when product contamination is present.
Data Source
AI summary
A dispensing nozzle for a container with a long tapered nozzle body has a narrow tapered dispensing end and a wider base end. A passage for fluid runs from the base end to the dispensing end and through an outlet. The dispensing nozzle has a removable cap that fits over the dispensing nozzle when in the closed position which closes the dispensing nozzle's outlet with a penetrating plug located on the interior of the cap. The cap has a narrow closed end that has the penetrating plug on its interior side and the cap has a wider open end. The cap fits onto the nozzle in a tight fit when closed. The invention contemplates that the fluid in the container is strong glue, so that hardened glue makes removing the cap difficult. To solve this problem, the nozzle and the cap have two distinct sets of ramps that provide the initial separating force to twist the cap with respect to the nozzle in order to remove the cap easily and allow dispensation.