Dispensing Cartridge Insert Positioning for Uniform Pouch Opening
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Solution Overview
Problem
Existing cartridges with inherently non-rigid film pouches and rigid inserts suffer from inconsistent positioning, leading to uneven opening behavior and waste due to adhesive connections.
Innovation Solution
A form-fitting and/or force-fitting connecting device is used to attach the insert to the head part, ensuring precise positioning and a reliable, detachable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an adhesive connection is used to attach the insert to the head part, then the connection is simple and cost-effective, but the positioning precision deteriorates and the opening behavior becomes uneven
Solution Approach 1:
The connection system is divided into separate functional elements: positioning elements (protrusions and recesses) that ensure precise positioning, and connecting elements (latching protrusions and recesses) that provide secure attachment. This segmentation allows each element to optimize its specific function without compromising the other.
Solution Approach 2:
The connecting device acts as an intermediary mechanism between the insert and head part, mediating the connection through form-fitting and force-fitting elements. This intermediary structure enables both precise positioning and reliable connection simultaneously, resolving the contradiction between simplicity and precision.
2Ease of manufacture
If the insert is loosely positioned on the head part, then the assembly is easier to manufacture, but the opening behavior becomes undefined and waste increases
Solution Approach 1:
The positioning elements are designed to automatically align and position the insert in the correct location during assembly. This preliminary positioning action ensures that the insert is precisely located before the final connection is made, preventing material waste due to incorrect positioning or uneven opening behavior.
3Manufacturing precision
If a form-fitting and force-fitting connecting device is used, then the insert positioning precision is improved, but the device complexity increases
Solution Approach 1:
The connecting device merges multiple functions into a single integrated structure: positioning protrusions and recesses are combined with latching protrusions and recesses in one component. This merging reduces the number of separate parts and simplifies the overall structure while maintaining both precise positioning and secure connection.
Data Source
AI summary
A cartridge for a dispensing device has at least one inherently non-rigid, elongate film pouch, which has a chamber for receiving a composition. The cartridge also has a head part for interacting with the film pouch. The head part has an inherently rigid insert, which is connected to the film pouch on a side facing the head part. A connecting device is provided, which can connect the insert to the head part in a form-fitting and/or force-fitting manner. The insert has at least one first connecting element of the connecting device and the head part has at least one second connecting element of the connecting device.