Delaminatable Laminated Bottle Introduction Hole Verification
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Solution Overview
Problem
Existing delaminatable laminated bottles, particularly small eyedroppers, face challenges in ensuring the formation and functionality of air introduction holes, which can be closed during the blow molding process, leading to potential defects and inefficiencies in content dispensing without a check valve.
Innovation Solution
A delaminatable laminated bottle design featuring a squeeze-deformable outer layer bottle with a test hole and an inner layer bag, where the introduction hole can be closed by squeezing the bottle body, allowing air to be compressed between layers for efficient content dispensing, and a production method that includes checking for air flow through a test hole to ensure hole formation and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the introduction hole is formed in a small bottle during injection molding, then the molding process is simplified and production costs are reduced, but the introduction hole is liable to be closed during the blow molding process
Solution Approach 1:
The patent applies preliminary action by forming the introduction hole in the preform during injection molding before the blow molding process. The hole is created in advance using a pin in the injection mold, ensuring its formation occurs before any potential closing during blow molding. This preliminary formation allows subsequent verification steps to detect and prevent defective bottles with closed holes.
Solution Approach 2:
The patent implements feedback through a verification method where air is introduced into the preform to check for proper introduction hole formation. This feedback mechanism identifies bottles with closed or defective holes before they proceed to blow molding, allowing defective preforms to be rejected and preventing the propagation of manufacturing defects through the production process.
2Reliability
If the inner layer thickness is increased to ensure proper functioning in small eyedroppers, then the inner layer can function as a check valve, but the ratio of inner layer thickness to mouth diameter increases which may prevent proper check valve function
Solution Approach 1:
The patent applies segmentation by separating the check valve function from the inner layer structure. Instead of relying on the inner layer itself to provide check valve functionality through increased thickness, the invention uses a distinct check valve component positioned at the mouth portion. This segmentation allows the inner layer to maintain appropriate thickness for small bottles while the separate check valve component ensures proper backflow prevention.
Solution Approach 2:
The patent implements local quality by providing the check valve function at a specific location (the mouth portion) rather than throughout the entire inner layer. The check valve component is locally positioned to perform the backflow prevention function, while the inner layer maintains its structural role without requiring excessive thickness that would compromise the bottle's overall dimensions and functionality.
3Measurement precision
If post-processing such as melt-processing or piercing is used to form an air introduction hole, then the hole formation can be verified, but the production process becomes more complex and plant costs increase
Solution Approach 1:
The patent applies merging by combining the introduction hole formation and verification functions into a single integrated process. The pin in the injection mold not only forms the introduction hole but also serves as a verification element, as the pin's successful passage through the preform confirms proper hole formation. This eliminates the need for separate post-processing steps and reduces overall process complexity.
Solution Approach 2:
The patent implements self-service through a self-verification mechanism where the injection molding process itself provides verification of introduction hole formation. The pin used to create the hole automatically verifies its successful formation by passing through the preform, eliminating the need for external verification equipment or additional processing steps. The process verifies itself through the inherent mechanics of hole formation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy closure of the introduction hole without a check valve, ensuring effective air compression and efficient dispensing of a significant amount of content liquid, while also allowing for defect checking in the production process.
Implementation Method 1
the introduction hole can be closed by squeezing the bottle body, allowing air to be compressed between layers for efficient content dispensing
Implementation Method 2
the member pressing the inner layer bag against the test hole so that the test hole is closed by the inner layer bag and the member
Data Source
AI summary
A particularly small eyedropper or the like is provided, which has a construction such that, when a body thereof is squeezed, an introduction hole thereof can be easily closed to compress air in a space between an inner layer and an outer layer thereof even in the absence of a check valve in the introduction hole, and defectiveness of the introduction hole can be easily checked. To this end, a test hole (19) communicating with an introduction hole (17) via a space between an outer layer bottle. (1) and an inner layer bag (16) is provided in an outer layer mouth portion (4). The test hole (19) is closed by the inner layer bag (16) and an inside plug (21) fitted in the mouth portion (4). Further, the introduction hole (17) is provided in a middle portion of a body which is pressed by a finger when the bottle is squeezed. The introduction hole (17) is closed by the finger.