Circular Cutting Blade Perforates Plastic Container Lids
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Solution Overview
Problem
Existing devices for perforating container lids, particularly in the paint coloring process, are ineffective for plastic lids as they tend to crack or break, leading to contamination and safety hazards, and do not facilitate efficient waste disposal.
Innovation Solution
A device using a cutting blade with a circular relative movement to create a hole in the lid, allowing for safe perforation of both plastic and metal containers without punching, and includes a suction pad for material removal and collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If punching is used to perforate the lid, then the perforation can be made quickly, but the lid breaks or cracks making it unusable
Solution Approach 1:
The patent replaces the punching mechanism (which applies concentrated impact force causing cracks) with a cutting blade mechanism that uses progressive cutting action. The cutting blade moves along a circular path, gradually separating the lid material through continuous cutting motion rather than sudden impact, thus preventing cracks while maintaining productivity.
Solution Approach 2:
The perforation process is divided into multiple small cutting segments along a circular path rather than a single punching action. The cutting blade performs incremental cuts at different positions around the perimeter, progressively separating the lid material into a complete circular opening without applying concentrated impact force that would cause cracking.
2Productivity
If punching is used to perforate the lid, then the hole can be made quickly, but waste material cannot be disposed of efficiently
Solution Approach 1:
The cutting action completely separates the removed lid portion from the main lid body, extracting the waste material as a discrete, removable piece. This complete separation allows the waste material to be easily removed from the container without leaving residual fragments, unlike punching which leaves cracked and fragmented waste that is difficult to dispose of.
3Ease of manufacture
If the lid is cut away partially and bent inside the container, then waste material can be retained, but the contents may be contaminated and user safety is compromised
Solution Approach 1:
The cutting blade completely extracts the lid portion that will become waste material, separating it cleanly from the main lid body. This complete extraction allows the waste to be removed entirely from the container system, eliminating the risk of contamination to contents and removing safety hazards associated with retained fragmented material.
4Reliability
If a cutting blade with circular movement is used, then the lid can be perforated safely without breaking, but the device complexity increases
Solution Approach 1:
The cutting blade mechanism serves multiple functions: it performs the cutting action, guides the circular motion, and can be integrated with existing container handling systems. The same cutting unit that creates the perforation also manages the separation of waste material, reducing the need for additional separate mechanisms and thereby limiting the increase in overall device complexity.
Data Source
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AI summary
A device for perforating the lid (C') of a container pre-filled with a base of paint or similar liquid material (C), of the type comprising: - a perforating tool (2A); and - means (34, 36, 38) designed to bring about a relative movement between said perforating tool and said container, said movement comprising at least one component along an axis orthogonal to the lid (C'), so that said tool traverses said lid; said device being characterized in that it has as perforating tool a cutting blade (2A) and in that it comprises rotation means (12, 14, 16, 18, 22, 24) designed to bring about a circular relative movement between said cutting blade and said lid, so that said cutting blade makes a circular cut on said lid.