Cap Sterilizer Pneumatic Pressure Control for High-Speed Conveyance
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Solution Overview
Problem
Conventional cap sterilizers face challenges in increasing conveying speed without compromising sterilization effectiveness, leading to increased costs and equipment size, and struggle with sterilizing lightweight or carbonated drink caps, which require precise seaming angle and torque control.
Innovation Solution
A cap sterilizer design that includes an infeed chamber, a sterilant atomizing chamber, and an air rinse chamber, where the exhaust pressures are strategically managed to ensure effective sterilization, and a washing chamber for further cleaning, allowing for high-speed cap conveyance while maintaining sterilization quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the conveying speed of the cap is increased in conventional cap sterilizers, then productivity increases, but the sterilization effect on the outer surface of the cap deteriorates
Solution Approach 1:
The sterilizer is divided into multiple chambers (infeed chamber, sterilant atomizing chamber, air rinse chamber, washing chamber) arranged in sequence along the conveying direction. Each chamber performs a specific function, allowing the cap to receive comprehensive sterilization treatment even at high conveying speeds. The segmentation enables parallel processing of different sterilization functions simultaneously.
Solution Approach 2:
The patent utilizes pneumatic principles by controlling exhaust pressures in different chambers. The exhaust pressure in the infeed chamber and air rinse chamber is higher than in the sterilant atomizing chamber, creating pressure differential that prevents sterilant leakage while maintaining effective sterilization. This pneumatic control allows high-speed operation without compromising sterilization quality.
2Productivity
If the conveying speed of the cap is increased, then productivity increases, but the equipment size and capital investment cost increase
Solution Approach 1:
The sterilizer integrates multiple functional chambers (infeed, sterilant atomizing, air rinse, washing) into a single compact unit with shared structure and control system. The chambers are arranged in sequence within a unified housing, reducing overall equipment footprint while maintaining high conveying speed capability. This merging approach avoids the need for separate sterilization equipment.
Solution Approach 2:
Each chamber serves multiple purposes: the infeed chamber prepares caps for sterilization, the sterilant atomizing chamber performs primary sterilization, the air rinse chamber removes excess sterilant, and the washing chamber provides final cleaning. This multi-functionality allows a single compact device to handle complete sterilization processes at high speed.
3Productivity
If the conveying speed of the cap is increased, then productivity increases, but the cost of medicine, thermal energy or washing water required for sterilization increases
Solution Approach 1:
The sterilization process operates continuously as caps move through the sequential chambers without interruption. The sterilant is applied continuously in the atomizing chamber, and the air rinse and washing functions operate continuously throughout cap conveyance. This continuous operation eliminates idle time and reduces total resource consumption compared to batch processing, maintaining high productivity while controlling costs.
Solution Approach 2:
The air rinse chamber uses exhaust air from the washing chamber to perform rinsing, and the washing chamber uses the same exhaust air for drying. This self-service approach where later chambers utilize resources from earlier chambers reduces the overall consumption of washing water and thermal energy while maintaining effective sterilization at high conveying speeds.
4Adaptability or versatility
If various cap types such as light-weight cap and cap for carbonated drinks are used, then adaptability increases, but controlling cap seaming angle and torque within specified range becomes more difficult
Solution Approach 1:
The sterilizer controls the physical parameters of caps during processing, including their orientation and position as they move through different chambers. By adjusting these parameters and ensuring uniform sterilization conditions, the system maintains consistent cap properties that facilitate precise seaming control for various cap types, including light-weight and carbonated drink caps.
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
Enables reliable sterilization of caps at increased conveying speeds, reduces equipment size, and lowers costs by integrating the sterilizer within the sterile chamber, allowing for efficient processing of various cap types with precise seaming control.
Implementation Method 1
a sterilant atomizing chamber which sprays a sterilant against a cap fed from the infeed chamber
Implementation Method 2
an air rinse chamber which air-rinses the cap sprayed with the sterilant in the sterilant atomizing chamber
Data Source
AI summary
A cap sterilizer (50) includes an infeed chamber (52), a sterilant atomizing chamber (53), and an air rinse chamber (54). At least the infeed chamber (52) and the air rinse chamber (54) are exhausted. Both an exhaust pressure (E2) in the infeed chamber (52) and an exhaust pressure (E4) in the air rinse chamber are higher than an exhaust pressure (E3) in the sterilant atomizing chamber (53), or the sterilant atomizing chamber (53) is not exhausted.