Plastic Preform Blow Molding With Characteristic Curve Extraction
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Solution Overview
Problem
The large volume of data generated during the blow molding process of plastic preforms into containers is difficult to process, store, and transmit effectively, hindering precise process evaluation and control.
Innovation Solution
The method involves applying at least two pressure levels to the plastic preform, using a rod-like body for expansion, and evaluating characteristic points of pressure and movement curves using a processor device to reduce data volume, allowing for process control and predictive maintenance without altering the machine hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complete measurement curves of pressure and stretching bar movement are recorded during the blow molding process, then precise knowledge about the process is gained, but the amount of data becomes very large and difficult to process, store, and transmit
Solution Approach 1:
The patent extracts only the essential characteristic points (extreme values, turning points, inflection points) from the complete measurement curves. Instead of processing entire pressure curves and stretching bar movement curves, the system identifies and stores only these critical points that represent the most important process information, thereby dramatically reducing data volume while preserving evaluation precision
Solution Approach 2:
The patent segments the continuous measurement curves into discrete characteristic points. By dividing the continuous data stream into specific meaningful points (extrema, turning points, inflection points), the system transforms unwieldy continuous data into manageable discrete data points that are easier to process, store, and transmit
2Quantity of substance
If characteristic points are determined through mathematical evaluation of recorded curves, then data volume is reduced for storage and transmission, but processing complexity increases
Solution Approach 1:
The evaluation system is integrated directly into the control device of the blow molding machine. The control device automatically performs the mathematical evaluation of measurement curves and extracts characteristic points without requiring external processing systems. This self-service approach reduces the need for separate complex evaluation hardware while maintaining the required processing capability
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 approach significantly reduces data requirements, enabling efficient storage and transmission of essential process data for machine settings and predictive maintenance, while maintaining precise process control across multiple forming stations.
Implementation Method 1
a plastic preform is introduced into a blow mould and expanded into a plastic container by the application of a flowable and, in particular, gaseous medium
Implementation Method 2
a rod-like body is preferably introduced into the plastic preform in order to expand the plastic preform in its longitudinal direction
Data Source
AI summary
Method for forming plastic preforms into plastic containers, wherein a plastic preform is introduced into a blow mould and is expanded into a plastic container by being applied by a flowable medium, wherein the plastic preform is applied by at least two different pressure levels and wherein furthermore preferably a rod-like body is introduced into the plastic preform, in order to expand the plastic preform in its longitudinal direction, wherein a pressure curve and/or a movement curve of the rod-like body being determined by a measuring device during the expansion process, whereinleast one of the curves is evaluated by means of a processor device and at least one point or region of this curve which is characteristic of the course is determined.