Blow Molding Control Unit for Real-Time Thickness Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for manufacturing containers by blow molding or stretch blow molding are inefficient and require significant manual adjustment of parameters, leading to lengthy production times and potential defects in container quality.
Innovation Solution
A method that utilizes a control unit to drive the preform heating, pre-blowing, and blowing steps based on selected driving parameters, allowing for real-time adjustment and optimization of the manufacturing process through a Graphical User Interface (GUI) and automated thickness measurement and correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment of manufacturing parameters is performed by an operator, then container quality conformity can be achieved, but production time increases significantly and productivity decreases
Solution Approach 1:
The system enables self-service by automatically adjusting manufacturing parameters through a feedback mechanism. Thickness measurements are automatically taken, compared against reference values, and parameter adjustments are made without operator intervention. The control unit autonomously modifies heating power, blowing pressure, or stretching speed based on real-time thickness data, eliminating the need for manual quality checks and adjustments while maintaining high production speeds.
Solution Approach 2:
The invention implements a closed-loop feedback system where thickness measurement devices continuously monitor container wall thickness during production. The measured values are automatically compared to reference values, and the control unit adjusts manufacturing parameters in real-time based on the deviation. This feedback mechanism ensures consistent quality conformity while maintaining high productivity, as the system self-corrects without stopping production or requiring manual intervention.
2Manufacturing precision
If multiple parameters are adjusted manually to correct quality defects, then container conformity can be improved, but the complexity of operation increases and time consumption increases
Solution Approach 1:
The system performs self-service by automatically determining which parameter to adjust and by what amount. The control unit receives thickness measurements, compares them to reference values, and autonomously selects the appropriate parameter (heating power, blowing pressure, or stretching speed) to modify. This eliminates the operator's burden of understanding complex parameter interrelationships and makes the system easy to operate while maintaining high conformity standards.
Solution Approach 2:
The control unit acts as an intermediary between the thickness measurement device and the manufacturing parameters. Instead of requiring the operator to directly adjust multiple parameters based on quality defects, the control unit mediates this process by automatically translating thickness deviations into appropriate parameter adjustments. This intermediary function simplifies operation while ensuring precise conformity correction.
3Manufacturing precision
If preliminary tests are performed for each container format to adjust parameters, then quality conformity can be ensured, but the time required for setup increases and productivity decreases
Solution Approach 1:
The system stores reference thickness values for different container formats in advance, prepared during the programming phase. When a new format is installed, the operator simply inputs the format identifier, and the system retrieves the corresponding reference values and initial parameter settings. This preliminary preparation eliminates the need for time-consuming manual parameter adjustment and testing for each format change, while still ensuring quality conformity through the feedback mechanism.
Solution Approach 2:
The feedback mechanism enables rapid format changes by continuously monitoring thickness and automatically adjusting parameters. Instead of requiring preliminary manual tests for each format, the system uses real-time feedback to adapt to the new format's characteristics. The control unit compares measured thickness values against stored reference values and automatically modifies parameters, allowing the system to quickly converge to optimal settings without lengthy setup procedures.
4Productivity
If real-time thickness measurement and parameter adjustment are implemented, then production time is reduced and productivity increases, but the complexity of the control system increases
Solution Approach 1:
The control unit serves multiple functions: it stores reference thickness values for different formats, controls thickness measurement devices, compares measured values against references, determines which parameter to adjust, calculates the adjustment amount, and modifies manufacturing parameters. This multi-functionality consolidates what would otherwise require multiple separate systems into a single control unit, reducing overall system complexity while enabling real-time measurement and adjustment for high productivity.
Solution Approach 2:
The invention merges the thickness measurement system, reference value storage, comparison logic, and parameter control into an integrated system. The control unit combines functions of data acquisition, data processing, decision-making, and actuation control. This merging reduces the number of separate components and interfaces, making the system more manageable despite its advanced capabilities, while enabling real-time feedback and adjustment that boosts productivity.
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 rapid optimization of the manufacturing process, reducing production time and improving container quality by allowing for real-time adjustments and minimizing manual intervention.
Implementation Method 1
a first so-called preform heating phase, during which a succession of preforms is heated in the heating unit to a reference temperature at which the preforms are in a malleable state
Implementation Method 2
a fluid under pressure is injected into each preform by the injection device, also called corresponding nozzle, to give the preform the final form of the container
Implementation Method 3
a stretching phase performed by means of a movable stretching rod arranged to apply a stretching force onto the bottom of a preform in a mold
Data Source
AI summary
A method for manufacturing containers from thermoplastic materials by blow molding or extrusion blow molding a preform that has been pre-heated in a furnace then placed in a mold consisting of two half-molds that define a molding cavity, said preform being blown into the mold, optionally with a pre-blowing step. In example embodiments, the method includes at least the following steps of: i) selecting at least one production configuration from a GUI (graphical user interface), each production configuration being associated with one or more control parameters; ii) compiling the various control parameters corresponding to the selected production configurations; and iii) executing said selected and compiled control parameters. In other example embodiments, the invention relates to computer program product, a data processing device, and a computer-readable storage medium implementing the steps of the method.