Resin Container Pattern Positioning on Non-Cylindrical Preforms
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Solution Overview
Problem
Existing methods for manufacturing resin containers face challenges in achieving high visibility, particularly when laser marking is performed on preforms due to difficulties in accurately positioning patterns on non-cylindrical surfaces.
Innovation Solution
A resin container manufacturing method that involves forming a first pattern on a preform using laser marking, followed by a second pattern based on the first pattern, ensuring accurate positioning and visibility, even on non-cylindrical surfaces, using low-cost optical devices like LEDs and PDs for recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If laser marking is performed on preform at the stage of preform, then manufacturing process is simplified, but visibility of the marked pattern on non-cylindrical surfaces deteriorates
Solution Approach 1:
The patent applies preliminary action by forming a first pattern on the preform before blow molding, then using this first pattern as a reference to form a second pattern at the final position where it will be visible on the completed container. This two-stage pattern formation ensures both ease of manufacture and high visibility by preparing the pattern in advance and then positioning it correctly on the non-cylindrical surface.
Solution Approach 2:
The patent uses the first pattern as a copy or reference to create the second pattern. The first pattern is formed initially, then its position information is used to determine where to form the second pattern on the non-cylindrical surface. This copying approach allows the pattern to be accurately positioned on complex geometries while maintaining visibility.
2Device complexity
If single pattern formation method is used, then manufacturing complexity is reduced, but positioning accuracy on non-cylindrical surfaces deteriorates
Solution Approach 1:
The patent segments the pattern formation process into two distinct stages: forming a first pattern on the preform, then forming a second pattern based on the first pattern's position. This segmentation allows each stage to serve a specific function - the first pattern for positioning reference and the second pattern for final visibility - thereby achieving high positioning accuracy without excessive overall complexity.
Solution Approach 2:
The first pattern is formed as a preliminary action that establishes position information before the final pattern is created. This preliminary positioning enables accurate placement of the second pattern on non-cylindrical surfaces while keeping the overall process manageable through systematic breakdown of the formation steps.
3Measurement precision
If complex image processing is used for pattern positioning, then positioning accuracy improves, but manufacturing cost increases
Solution Approach 1:
The patent uses a simple copying approach where the first pattern serves as a direct reference for positioning the second pattern. Instead of using complex image processing systems, the position information from the first pattern is copied and transferred to determine the second pattern's location. This maintains high positioning accuracy while avoiding the cost and complexity of sophisticated image processing equipment.
Solution Approach 2:
The first pattern can be considered a disposable reference element that is formed temporarily and then used to guide the formation of the second pattern. This approach eliminates the need for expensive, complex image processing systems by using a simple, inexpensive reference pattern that achieves the same positioning function.
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
This method enables the production of resin containers with enhanced visibility by accurately forming patterns on multiple surfaces without the need for complex image processing, reducing costs and maintaining high manufacturing efficiency.
Implementation Method 1
irradiating the preform with a laser beam
Implementation Method 2
forming a first pattern on a preform (30) by changing properties of a base material constituting the preform (30)
Data Source
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AI summary
A resin container manufacturing method includes: forming a first pattern (11) on a preform (30) of a resin container (40); and forming a second pattern (12) on the preform (30) based on a position of the first pattern (11) on the preform (30).