Mold Alignment Member Sensing for Micron-Scale Misalignment Detection
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Solution Overview
Problem
Existing molding structures face challenges in accurately detecting small misalignments between moveable and stationary mold parts, which can lead to suboptimal quality of molded articles due to vibrations and rapid translations during the molding process.
Innovation Solution
A misalignment sensing system is integrated into the molding structure, utilizing strain gauges or Piezo film sensors embedded in the alignment members, such as a straight lock, to measure deformation and determine the magnitude and direction of misalignment, allowing for real-time monitoring and alerting of operators to potential misalignments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate alignment measurement systems are used to detect misalignment between mold parts, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the alignment measurement function with the existing straight lock alignment member by embedding strain gauges directly into the straight lock structure. This integration eliminates the need for separate alignment measurement systems while maintaining high measurement precision, as the strain gauges directly measure deformation of the alignment member itself.
Solution Approach 2:
The straight lock alignment member serves dual functions: it performs its primary alignment function while simultaneously serving as the measurement element through embedded strain gauges. The alignment member self-monitors its own deformation state, eliminating the need for external measurement systems.
2Measurement precision
If strain gauges are embedded in alignment members to detect misalignment, then measurement precision is improved, but manufacturing complexity increases
Solution Approach 1:
The straight lock alignment member is designed with discrete slots that segment the structure to accommodate strain gauge placement. These slots provide defined mounting locations for the strain gauges, simplifying the integration process while maintaining the structural integrity and alignment function of the straight lock.
Solution Approach 2:
The strain gauges are embedded into the straight lock alignment member during the manufacturing process rather than being added as a separate post-manufacturing step. This preliminary integration ensures proper positioning and bonding of the strain gauges while the alignment member is being fabricated, simplifying the overall manufacturing process.
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 solution reduces the complexity of separate alignment measurement systems, enabling precise detection of misalignments as low as 30 micrometers, thereby improving the consistency and quality of molded articles by ensuring accurate alignment of mold parts.
Implementation Method 1
at least one sensor embedded in the alignment member and configured to measure deformation of the alignment member
Implementation Method 2
utilizing strain gauges or Piezo film sensors embedded in the alignment members
Data Source
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AI summary
A misalignment sensing system for a molding structure and a method for using same. The molding structure includes a first component and a second component, at least one of the components being selectively repositionable between a closed configuration of the mold structure and an open configuration of the mold structure. The misalignment sensing system includes an alignment member including a male portion coupled to and extending from the first component of the molding structure, and a female portion defined in the second component of the molding structure, the female portion being configured to receive the male portion when the molding structure is in a closed configuration; and at least one sensor connected to one of the male and female portions and being configured to detect a deformation of any one of the male portion and the female portion, the deformation being induced by a misalignment of the molding structure.