Blow Molding Valve Timing Control for Pressure Level Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing forming devices for plastics material containers do not account for variable valve switching time delays due to wear and tear, leading to potential overflow and increased air consumption.
Innovation Solution
A method and apparatus that measure and compensate for valve switching time delays by determining pressure changes and time intervals, allowing for automatic adjustment of machine parameters without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigid machine parameters for valve switching time delay are stored, then overflow between pressure levels is prevented, but valve switching time delay changes due to wear and tear are not compensated
Solution Approach 1:
The system continuously monitors the actual switching time delay of valves and feeds this information back to the control unit, which automatically adjusts the machine parameters to compensate for wear and tear, maintaining reliable operation without manual intervention
Solution Approach 2:
The machine parameters are changed from rigid fixed values to dynamic values that automatically adapt based on the actual valve performance, allowing the system to respond to changing conditions caused by wear and tear
2Adaptability or versatility
If machine parameters are changed manually with higher user rights, then valve switching time delays can be adjusted, but incorrect entries lead to higher air consumption
Solution Approach 1:
The control unit automatically determines and adjusts the machine parameters based on measured valve switching times, eliminating the need for manual parameter changes and preventing incorrect entries that would increase air consumption
Solution Approach 2:
The manual parameter adjustment process is replaced by an automated measurement and adjustment system that uses pressure sensors and control algorithms to determine optimal parameters, eliminating human error
3Ease of operation
If valve switching time delay is not taken into account, then the system is simple to operate, but overflow between pressure levels occurs
Solution Approach 1:
The system automatically measures the valve switching time delay using pressure sensors and adjusts the control timing accordingly, maintaining reliable pressure control without requiring user intervention or complex manual adjustments
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
Ensures precise control of pressure levels, prevents overflow, and reduces air consumption by dynamically adjusting to changing valve performance, enhancing the accuracy and efficiency of the blow molding process.
Implementation Method 1
wherein this measured value results from a pressure measured value
Implementation Method 2
Heated plastics material preforms are usually formed into plastics material containers by applying compressed air to the plastics material preforms
Data Source
AI summary
Disclosed is a method for operating a forming device for forming plastics material preforms into plastics material containers, wherein the forming device has a movable carrier on which a plurality of forming stations are arranged, wherein each of these forming stations forms plastics material preforms into the plastics material containers by applying a flowable and, in particular, gaseous medium in an operation mode, wherein in the operation mode at least two different pressure levels are applied to the plastics material preforms for the expansion thereof and at least two valves are used for this application, wherein at least one measured value is determined, at least at times, which is characteristic of a switching time and/or a switching time delay of at least one of the valves, wherein this measured value results from a pressure measured value.