Filling Nozzle With Porous Plug for Powder Adhesion
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Solution Overview
Problem
Conventional filling nozzles face issues with powder adherence during wet powder filling, requiring high-pressure air and expensive equipment, and can lead to incomplete powder supply due to air flow obstruction and improper air distribution.
Innovation Solution
A filling nozzle design featuring a filling cylinder with an auger, an air-injection cylinder forming an annular space, and a tapered air-discharge mouth with a water-repellent coating, using low-pressure air to prevent powder adherence, and an optional lifting unit for precise air-injection positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If high-pressure air is used to prevent powder adherence, then powder adherence is reduced, but equipment cost and complexity increase
Solution Approach 1:
The filling nozzle incorporates a porous plug made of porous resin material positioned at its tip. This porous structure allows air to pass through and create airflow along the inner surface of the nozzle, preventing powder adherence without requiring high-pressure air sources. The porous material naturally distributes air flow through its interconnected pores, achieving the anti-adhesion effect with low-pressure air.
Solution Approach 2:
The porous plug acts as an intermediary element between the air supply and the nozzle interior. It transforms the air supply mechanism from direct high-pressure injection to distributed low-pressure flow through pores, mediating the interaction between air and powder to prevent adherence while reducing equipment requirements.
2Object-affected harmful factors
If high-pressure air is supplied through porous plastic, then air flow is generated to prevent adherence, but the porous holes can be plugged by powder reducing air supply
Solution Approach 1:
The porous plug is designed with a specific pore structure where the pore diameter is larger than the powder particle diameter, preventing powder particles from blocking the pores. The porous resin material provides sufficient air permeability even when powder is present, ensuring consistent air flow for preventing adherence without the plugging problems experienced with smaller-pore porous plastic.
3Object-affected harmful factors
If high-pressure air is used to clear the nozzle, then powder adherence is prevented, but powder may blow upward instead of being supplied into the container
Solution Approach 1:
The invention changes the air pressure parameter from high-pressure to low-pressure supply. The porous plug distributes this low-pressure air along the nozzle inner surface, creating sufficient airflow to prevent powder adherence through shear forces, but not enough pressure to blow powder upward or disrupt the filling process. This parameter optimization resolves the contradiction between preventing adherence and maintaining supply efficiency.
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 efficient and cost-effective powder filling by preventing adherence with low-pressure air flow along the tapered surface, ensuring complete supply without the need for high-pressure air sources and maintaining a simple, inexpensive structure.
Implementation Method 1
air flow is generated on an inner surface of the nozzle by compressed air supplied from the outside
Implementation Method 2
An inner surface of the air-discharge mouth may be coated with a water-repellant layer
Data Source
AI summary
A filling nozzle provided with a filling cylinder, an air-injection cylinder, and an air-supply unit. The filling cylinder is configured such that an auger rotates about the axis thereof to discharge powder through an opening provided at the lower end of the filling cylinder. The air-injection cylinder is fitted to the exterior of the filling cylinder to form an annular space between the filling cylinder and the air-injection cylinder. The air-supply unit supplies air in the annular space. A tip portion of the air-injection cylinder extends downward below the opening and has an air-discharge mouth formed in a tapered shape such that the tip portion has a diameter smaller than that of the opening.