Pellet Transfer via Pneumatic Pressure Differential
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Solution Overview
Problem
Existing methods fail to provide a reliable and efficient way to separate and transfer fragile, sensitive cryo-pellets due to mechanical damage, low density, and electrostatic charging issues, making precise volumetric metering and handling challenging.
Innovation Solution
A method and device utilizing vertically oriented metering ducts with pressure differential ducts to pneumatically suction and eject pellets, minimizing mechanical contact and using negative and positive pressures to accurately transfer pellets, while maintaining a protective gas atmosphere to prevent damage and charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If conventional supply technologies (slides, vibration infeeds) are used to transfer pellets, then the transfer process can be automated, but mechanical damage and abrasion occur to the fragile pellets
Solution Approach 1:
The patent replaces mechanical transfer systems (slides, vibration infeeds) with a pneumatic system that uses pressure differentials to move pellets. A blowing air nozzle directs a controlled air stream to transport pellets gently without mechanical contact, eliminating abrasion and structural damage while maintaining automation capability
Solution Approach 2:
The invention employs pneumatic principles by using compressed air to create pressure differentials for pellet transfer. The blowing air nozzle generates a controlled air stream that moves pellets through the air stream without physical contact, allowing automated transfer while preserving pellet integrity
2Extent of automation
If vibration infeed is used to supply pellets, then automated feeding is achieved, but electrostatic charging occurs due to frequent contact with surfaces
Solution Approach 1:
The patent eliminates mechanical contact-based feeding systems that cause electrostatic charging by using a pneumatic air stream to transport pellets. The blowing air nozzle creates a non-contact transfer mechanism that moves pellets through air flow, preventing the surface contact that generates electrostatic charges
Solution Approach 2:
The invention uses a controlled air stream environment to transfer pellets, creating a neutral atmosphere that prevents electrostatic charging. The pneumatic system operates in a controlled air flow that dissipates any potential electrostatic charges without requiring special inert gas atmospheres
3Measurement precision
If volumetric metering is used to fill packaging units, then precise quantity control is achieved, but the fragile pellets are damaged due to handling requirements
Solution Approach 1:
The patent replaces mechanical volumetric metering devices with a pneumatic counting system. The blowing air nozzle is positioned to selectively transport individual pellets or small groups through the air stream, enabling precise quantity control without mechanical handling or volumetric measurement that would damage the pellets
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 and economical transfer of cryo-pellets with minimal mechanical stress and electrostatic interference, ensuring precise delivery without abrasion or damage, even with low material densities.
Implementation Method 1
impinging a first pressure differential duct, which opens into the metering duct via a first duct mouth above the connection point, with negative pressure, wherein a pellet is suctioned onto the first duct mouth and on account thereof is locationally fixed thereto
Implementation Method 2
impinging a second pressure differential duct, which opens into the connection point via a second duct mouth, with positive pressure, wherein the pellet that is located in the connection point is pneumatically ejected by way of the outlet duct and supplied to the target container
Data Source
AI summary
A pellet column is formed in a metering duct. The lowermost pellet is located in a connection point where an outlet duct is connected to the metering duct and leads transversely away therefrom. A first duct, which opens into the metering duct via a first duct mouth above the connection point, is impinged with negative pressure, wherein a pellet is suctioned onto the first duct mouth and is fixed thereto. This pellet acts as a block for the pellets thereabove. A second duct, which opens into the connection point via a second duct mouth, is impinged with positive pressure, wherein the pellet at the connection point is pneumatically ejected via the outlet duct and supplied to a container. After the ejection of the lowermost pellet, the negative pressure in the first duct is switched off such that the pellet held at the first duct mouth advances toward the connection point.