Single-Piece Cap Cutting Knife for Precise Tamper-Evident Notches
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Solution Overview
Problem
Existing cutting devices for plastic caps are structurally complex, requiring multiple parts and high precision assembly, leading to increased production costs and downtime, and result in low-quality notches due to improper part positioning.
Innovation Solution
A single-piece knife with a simple, robust structure featuring various cutting protrusions and edges arranged at different tilts to create incisions and notches on plastic caps, allowing for efficient and precise cutting without complex assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple parts and high precision assembly are used in cutting devices, then cutting precision can be improved, but device complexity and production costs increase
Solution Approach 1:
The patent combines multiple cutting edges and protrusions into a single knife body structure. The knife includes a first cutting edge for horizontal cutting and a second cutting edge for vertical cutting, both integrated into one piece rather than using separate blades or components. This merging approach maintains cutting precision while significantly reducing device complexity and the number of parts requiring assembly.
Solution Approach 2:
The knife is designed with multiple functional cutting edges and protrusions segmented along its length. The first cutting edge creates horizontal incisions while the second cutting edge creates vertical incisions, and cutting protrusions create notches at specific positions. This segmentation of cutting functions within a single integrated structure allows precise control over the cutting pattern without requiring multiple separate components.
2Adaptability or versatility
If multiple parts are used in cutting devices, then cutting functionality can be improved, but assembly time and production downtime increase
Solution Approach 1:
Multiple cutting functionalities are merged into a single knife structure. The knife body integrates the first cutting edge, second cutting edge, and multiple cutting protrusions into one component that performs horizontal cutting, vertical cutting, and notch creation simultaneously. This eliminates the need to assemble multiple separate blades or cutting components, drastically reducing assembly time and production downtime while maintaining versatile cutting functionality.
3Manufacturing precision
If complex assembly is required, then cutting precision can be improved, but production costs increase
Solution Approach 1:
The knife integrates all cutting and notching functions into a single manufactured component. The first cutting edge, second cutting edge, and cutting protrusions are all formed as part of the same knife body through a single manufacturing process. This eliminates the need for complex multi-component assembly operations and reduces production costs while ensuring consistent notch quality through precise integration of all cutting elements.
Data Source
AI summary
A knife is arranged for being fitted in a cutting apparatus for obtaining incision lines and notches on a cap made of plastics intended for closing a container and is suitable for making notches and incisions on a side wall of the cap when the cap, by rotating around its own rotation axis, is moved along a path for interacting with the knife in an advancement direction; the knife includes an arrangement of cutting edges that project from a peripheral region of the knife, the arrangement of cutting edges including:an opening formation part that extends parallel to a horizontal plane orthogonal to the rotation axis, the at least one opening formation part being arranged for making at least one circumferential notch on the side wall at a first height on a vertical axis that is substantially parallel to the rotation axis to define a tamper-evident ring and a main body in the cap;at least one connection formation part that occupies a region extending between the first quote and a second height that is greater than the first height on the vertical axis, the connection formation part being arranged for making at least one notch on the side wall to determine at least one connection portion connecting the tamper-evident ring and the main body;wherein the knife consists of a single piece, the arrangement of cutting edges being obtained in the single piece.