Plastic Injection Part Authentication via Impurity Patterns
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Solution Overview
Problem
Existing authentication techniques for plastic parts, such as laser marking or RFID, are costly and difficult to implement in low-cost industrial processes, especially for parts like bottle caps, and do not provide a unique and easily verifiable method for traceability and recycling.
Innovation Solution
Incorporating a significant quantity of impurities into the plastic component during injection molding to create distinguishable elements on the part's surface, which can be mapped to form a unique identification zone, along with a marker, allowing for authentication through imaging and comparison with a database.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional authentication techniques (laser marking, RFID, holograms) are used, then authentication capability is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The invention converts the harmful effect of impurities (which create visual defects) into a beneficial authentication feature. By deliberately introducing impurities into the plastic material during injection molding, unique random patterns are created that serve as identification markers, eliminating the need for separate authentication components and reducing manufacturing costs.
Solution Approach 2:
The authentication capability is embedded directly into the plastic material itself through the inclusion of impurities. The part authenticates itself through its inherent random impurity pattern, eliminating the need for external authentication systems like RFID readers or laser marking equipment, thereby simplifying the manufacturing process.
2Reliability
If traditional authentication techniques (laser marking, RFID) are used, then authentication capability is improved, but manufacturing process complexity increases
Solution Approach 1:
The invention merges the authentication feature with the base plastic material by incorporating impurities during the injection molding process. This consolidation eliminates the need for separate authentication components and processes, reducing overall manufacturing complexity while maintaining authentication capability.
Solution Approach 2:
The plastic material itself provides the authentication function through its random impurity pattern, eliminating the need for external authentication systems. The part authenticates itself through its inherent characteristics, simplifying the manufacturing process and reducing device complexity.
3Reliability
If impurities are introduced to create unique patterns, then authentication capability is improved, but manufacturing precision deteriorates due to visible imperfections
Solution Approach 1:
The invention converts the harmful visual imperfections caused by impurities into beneficial authentication features. The random patterns created by impurities, which would normally be considered defects requiring removal, are instead embraced as unique identification markers that enable authentication.
Solution Approach 2:
The invention changes the role of impurities from unwanted contaminants to intentional authentication features. By controlling the amount and distribution of impurities, the system transforms a quality defect into a functional advantage for part identification and traceability.
Data Source
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AI summary
The invention relates to a part formed by injecting a plastic component into a volume delimited by a surface. Such a part comprises a plurality of distinguishable elements obtained by the presence of a non-negligible quantity of impurities in the plastic component during injection, the distinguishable elements being identifiable on a portion of the surface of the part, the portion being called the identification zone, the part also comprising at least one marker near or within the identification zone.