Asymmetric Cutter Ejection Cap Film Penetration
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Solution Overview
Problem
Conventional ejection caps struggle to smoothly and reliably break through laminated films sealing container contents, leading to difficulties in dispensing the contents due to the shape and placement of cutters on the dispensing cylinder tip.
Innovation Solution
The ejection cap features an asymmetric cutter with a cutout on the side surface opposite to the direction of rotation on the dispensing cylinder tip, along with multiple cutters of varying heights positioned at specific angles, allowing for effective penetration of the film without causing the entire film piece to fall into the container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cutter is provided on the dispensing cylinder tip, then the film can be cut, but the film may not be broken through smoothly and reliably depending on the shape and placement of the cutter
Solution Approach 1:
The cutter is designed with an asymmetric shape featuring a cutout on the side surface opposite to the direction of rotation. This asymmetric configuration allows the cutter to engage with the film in a specific orientation, enabling smooth penetration while maintaining reliable cutting action. The cutout creates a leading edge that initiates film separation and a trailing edge that completes the cut, resolving the contradiction between smoothness and reliability.
Solution Approach 2:
The asymmetric cutter design performs preliminary action by creating an initial incision in the film at the leading edge, which then allows the rest of the cutter to complete the penetration smoothly. This preliminary cutting action reduces resistance during the subsequent cutting process, achieving both smooth film breaking through and reliable penetration.
2Reliability
If multiple cutters are provided on the dispensing cylinder tip, then film penetration is improved, but the device complexity increases
Solution Approach 1:
The cutting function is segmented into multiple cutters positioned at different heights and angles around the dispensing cylinder tip. Each cutter contributes to film penetration at different stages or locations, improving overall reliability. The segmentation allows the film to be cut at multiple points simultaneously or sequentially, ensuring complete penetration without requiring an overly complex single-cutter design.
Solution Approach 2:
Different cutters are positioned at specific locations (different heights and angular positions) around the dispensing cylinder tip, with each cutter optimized for its local position. This local quality approach ensures that each cutter contributes effectively to film penetration at its specific location, improving overall reliability while maintaining manageable complexity through standardized positioning patterns.
Data Source
AI summary
Provided is an ejection cap capable of smoothly and reliably breaking through a film closing a mouth part of a container body and ejecting a content inside a container.An ejection cap (1) comprising an asymmetric cutter (6) that hangs from a lower surface of a top plate part of a substantially cylindrical dispensing cylinder (4) threadedly engaging a mouth part (3a) of a container body (3) closed by a film (2) and penetrating the film to eject a content, and that has a notch part (7) at a lateral surface on a side opposite to a threadedly engaging rotating direction on a substantially circumference at the tip of the dispensing cylinder.