Variable Speed Glass Forming Chuck for Pharmaceutical Vials
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Solution Overview
Problem
Existing glass forming machines for pharmaceutical vials operate at fixed rotational speeds, leading to high process temperatures, increased evaporation losses, and contamination risks, while lacking precision and cost-effectiveness.
Innovation Solution
A device with a clamping chuck and rotary drive that allows for variable rotational speeds, coupled with a heat source, enabling optimal speed adjustment for each phase of glass forming, reducing temperatures and evaporation losses, and utilizing cost-effective heating methods like resistance-heated gas heaters or infrared radiators, while maintaining chemical glass characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed rotational speed is used for all phases of glass forming, then device complexity is reduced, but manufacturing precision and process optimization are worsened
Solution Approach 1:
The patent applies dynamics by transitioning from fixed rotational speed to variable rotational speed control. The rotary drive is equipped with a control system that enables continuous adjustment of rotational speed according to different forming phases and requirements, allowing the system to adapt dynamically rather than operating at a single fixed speed.
Solution Approach 2:
The patent implements parameter changes by varying the rotational speed parameter throughout the glass forming process. Different rotational speeds are applied at different stages (e.g., higher speeds for certain forming operations, lower speeds for others), optimizing the forming process for each specific phase rather than using a uniform speed throughout.
2Productivity
If high rotational speed is used for glass forming, then productivity is improved, but process temperature must be increased which worsens evaporation losses
Solution Approach 1:
The patent utilizes parameter changes by adjusting rotational speed based on the specific forming phase and temperature requirements. By optimizing the rotational speed parameter, the system achieves high productivity at appropriate speeds while avoiding the need to excessively increase temperature, thereby reducing evaporation losses of glass constituents.
Solution Approach 2:
The control system monitors the forming process and adjusts rotational speed in response to process conditions, creating a feedback mechanism that optimizes productivity while maintaining temperature control to minimize evaporation losses.
3Speed
If high process temperature is used for glass forming, then forming speed can be maintained, but glass composition changes due to evaporation which worsens product quality
Solution Approach 1:
The patent applies parameter changes by optimizing rotational speed to achieve the desired forming speed without requiring excessive temperature increases. This maintains glass composition stability by keeping the process temperature as low as possible while still achieving high productivity through speed optimization.
4Manufacturing precision
If variable rotational speed control is implemented, then manufacturing precision and temperature control are improved, but device complexity increases
Solution Approach 1:
The patent implements dynamics by integrating a control system into the rotary drive that enables variable rotational speed operation. This dynamic control capability allows precise adjustment of speed according to forming phase requirements, improving manufacturing precision while managing the added complexity through systematic control integration.
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
The solution allows for reduced forming temperatures, minimized evaporation losses, improved glass quality, and increased precision in glass forming, enhancing the profitability of laser-assisted deformation and simplifying the forming process by adjusting rotational speeds and using zone-selective heating.
Implementation Method 1
a glass body is driven rotatingly, is at least locally heated to its softening temperature, preferably to a viscosity in the range of 10³ to 10⁵ dPas
Implementation Method 2
heated to its softening temperature, preferably to a viscosity in the range of 10³ to 10⁵ dPas
Implementation Method 3
Since the rotational speed can be adjusted and varied as desired, for each glass treating phase an optimal speed can be utilized. In this way in particular at higher rotational speeds of more than 1000 rpm a reduced temperature can be utilized
Data Source
AI summary
A device for the shaping of glass bodies, in particular of pharmaceutical vials, comprises a clamping chuck for holding a glass body, a rotary drive for driving the clamping chuck rotatingly, further at least one heat source for heating a glass body held within the clamping chuck, and further a controller which is coupled to the rotary drive so that the clamping chuck can be driven at variable rotational speed.