Magnetic Fluid Valve Overmolding for Precise Closing Behavior
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Solution Overview
Problem
Existing fluid valves with magnetic drive units are complex and costly to manufacture, requiring calibration of the armature's end position to achieve a defined closing behavior.
Innovation Solution
A fluid valve design featuring a drive unit with a core, electric coil, and armature, where the core is fixed in a defined position relative to the armature support through overmolding, simplifying manufacturing and eliminating the need for final adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the core position is adjusted manually to achieve defined switching behavior, then the valve closing behavior is precise, but the manufacturing cost and complexity increase due to calibration requirements
Solution Approach 1:
The core position is predetermined and fixed during the injection molding process itself, rather than requiring subsequent manual calibration. The injection molding tool defines the core insertion position, ensuring precise positioning is achieved as part of the primary manufacturing operation, eliminating the need for separate calibration steps.
Solution Approach 2:
The manual mechanical adjustment and calibration process is replaced by an automated injection molding process. The injection molding tool automatically positions and fixes the core at the precise location required for proper valve operation, substituting human-operated mechanical calibration with an automated molding process.
2Measurement precision
If manual calibration of the armature end position is performed, then the switching behavior is defined accurately, but the production time and manufacturing cost increase
Solution Approach 1:
The armature end position is predetermined and established during the injection molding process, before the valve leaves the production line. The core position, which directly determines the armature end position, is fixed by the injection molding tool, ensuring accurate positioning is achieved as part of the primary manufacturing operation rather than requiring subsequent calibration steps that would slow production.
3Ease of manufacture
If the core insertion position is not precisely defined, then the manufacturing process is simpler, but the valve requires readjustment and recalibration
Solution Approach 1:
The manual positioning and adjustment process is replaced by the injection molding process, which automatically and precisely positions the core. The injection molding tool provides the mechanical means to fix the core at the exact required position, ensuring both manufacturing simplicity (no manual positioning needed) and operational reliability (precise positioning achieved).
Solution Approach 2:
The injection molding process itself provides the positioning function, without requiring separate positioning mechanisms or manual intervention. The molding tool automatically ensures the core is inserted at the correct position and fixed in place, making the system self-sufficient for positioning requirements.
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 fluid valve is manufactured at lower costs with a simplified process, and achieves a defined switching behavior without the need for recalibration, ensuring precise and reproducible operation.
Implementation Method 1
The drive unit comprises a core, an electric coil partially surrounding the core, and an armature movable by the energization of the coil and the resulting magnetic force
Implementation Method 2
The core introduced into the at least one insertion opening is fixed to the main body by means of an overmold in such a way that the core assumes a defined position relative to the armature support
Data Source
AI summary
A fluid valve having a drive unit for a valve closing body is provided. The drive unit can have a core, an electric coil partially surrounding the core, and an armature movable by the energization of the coil and the resulting magnetic force, the drive unit having a main body on which a support for the coil, at least one insertion opening for the core and an armature support are provided, and the core inserted into the at least one insertion opening being fixed to the main body by an overmold in such a way that the core assumes a defined position relative to the armature support.