Ferromagnetic Piston Actuation with Plastic Outer Body
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Solution Overview
Problem
Current fluid dose-measuring devices face challenges in manufacturing complexity and limited design freedom due to the need for ferromagnetic materials with limited corrosion resistance, which complicates the fabrication process and increases costs.
Innovation Solution
A fluid dose-measuring device with a ferromagnetic actuation part encapsulated in an outer body made of a non-metallic material, such as plastic, allowing for simpler manufacturing and increased design freedom, as the outer body can be injection-molded and provide efficient protection to the ferromagnetic material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ferromagnetic material is used for the piston to enable electromagnetic actuation, then the piston can be actuated by electromagnetic field, but the corrosion resistance is limited and manufacturing complexity increases
Solution Approach 1:
The piston is divided into two separate components: a ferromagnetic actuation part for electromagnetic actuation and a non-metallic outer body for protection and fluid interaction. This segmentation allows each part to be optimized for its specific function without compromise.
Solution Approach 2:
The non-metallic outer body acts as an intermediary between the ferromagnetic actuation part and the fluid environment. It protects the ferromagnetic material from corrosion while allowing electromagnetic field penetration to actuate the piston.
2Ease of operation
If ferromagnetic material is used for the piston, then electromagnetic actuation is enabled, but protection against corrosion becomes more difficult
Solution Approach 1:
The non-metallic outer body serves as a protective intermediary that shields the ferromagnetic actuation part from corrosive fluid environments while permitting electromagnetic field penetration for actuation.
Solution Approach 2:
The piston combines ferromagnetic material for actuation with non-metallic material for corrosion resistance, creating a composite structure that leverages the advantages of both materials while mitigating their individual disadvantages.
3Reliability
If protective coating is applied to ferromagnetic piston, then corrosion resistance is improved, but manufacturing process becomes more complex
Solution Approach 1:
Instead of coating the ferromagnetic piston, the design segments the piston into separate ferromagnetic and non-metallic parts. This eliminates the need for protective coating processes while maintaining corrosion resistance.
Solution Approach 2:
The non-metallic outer body provides inherent corrosion resistance without requiring additional protective layers, simplifying the manufacturing process by eliminating coating steps.
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
This approach reduces manufacturing complexity and costs while enhancing design flexibility, allowing for more predictable fluid dispensing and improved protection against corrosion, leading to a more economical and efficient dose-measuring device.
Implementation Method 1
The piston is actuated by an electromagnetic field interacting with ferromagnetic material in the piston
Implementation Method 2
an electromagnetic field can be produced with a coil, e.g. solenoid coil... By appropriately energizing the coil, the piston will move
Implementation Method 3
The piston may move back to the original position to form a single reciprocation by deenergizing the coil in combination with gravity, pressure inside the container, or a spring force applied by a spring element
Implementation Method 4
The escape of liquid may be caused by gravity or pressure inside the container
Implementation Method 5
pressure inside the container
Data Source
AI summary
A fluid dose-measuring device adapted to be releasably received in a dispensing apparatus having an electromagnetic coil includes a housing with an outlet passage and a connector part defining an inlet passage, the housing forming an internal chamber which is in fluid communication with the inlet passage and the outlet passage, and the connector part being connectable to a fluid container; a piston moveably arranged in the chamber of the housing for reciprocating motion between a closed position in which a flow from the inlet passage to the outlet passage is prevented and an open position in which a flow from the inlet passage to the outlet passage is allowed, the piston comprising a ferromagnetic actuation part for electromagnetic actuation of the piston by the electromagnetic coil, where the actuation part is arranged in an outer body.