Floating Shut-Off Nozzle Alignment to Reduce Wear and Turbulence
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shut-off nozzles for molding machines suffer from wear due to friction during rotational movement, leading to misalignment of the valve element, which causes turbulent flows, additional heating, and reduced flow accuracy.
Innovation Solution
The shut-off nozzle features a valve element mounted rotationally about an axis of rotation relative to the fluid housing, allowing for a floating mounting that enables the valve element to align itself with the fluid channel through the flow of fluid, reducing wear and maintaining optimal alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the valve element is axially supported by a shoulder or similar structure to prevent axial movement, then the axial position of the valve element is ensured, but friction and wear occur during rotational movement, leading to displacement and misalignment
Solution Approach 1:
The harmful axial support structure (shoulder) that causes friction is completely removed. Instead, the valve element is held in position by the pressure differential created during operation, extracting the problematic mechanical constraint while maintaining positioning function.
Solution Approach 2:
The valve element positions itself automatically through the pressure differential generated during operation. The higher pressure behind the valve element creates an axial force that maintains the correct position, eliminating the need for external mechanical support structures.
2Manufacturing precision
If the valve element is axially supported to prevent movement, then positioning is maintained, but turbulent flows occur due to misalignment, causing additional heating
Solution Approach 1:
The valve element self-aligns through the pressure differential, ensuring the through-opening remains precisely aligned with the fluid channel. This eliminates edges and corners that would cause turbulence and unwanted heating.
Solution Approach 2:
The mechanical shoulder support is replaced with a fluid pressure-based positioning system. The pressure differential creates both the positioning force and the alignment, substituting mechanical constraints with fluid dynamics control.
3Stability of the object's composition
If the valve element is axially supported during rotation, then structural stability is maintained, but wear causes uncontrolled displacement and reduced flow accuracy
Solution Approach 1:
The axial support structure causing wear is removed entirely. The valve element operates without mechanical contact in the axial direction, eliminating wear while maintaining stability through pressure-based positioning.
Solution Approach 2:
The valve element maintains its own position through the pressure differential generated during operation. This self-positioning mechanism ensures long-term flow accuracy without degradation from wear.
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 design minimizes wear-related misalignment, prevents turbulent flows, reduces additional heating, and ensures consistent flow accuracy, thereby improving the operational efficiency and longevity of the shut-off nozzle.
Implementation Method 1
the valve element is allowed an axial movement along the axis of rotation relative to the valve housing, so that the valve element can align itself with the fluid channel of the valve housing with the through-opening by the flow of the fluid through the shut-off nozzle
Implementation Method 2
the turbulent flow, for example at edges or corners, additionally introduces thermal energy of the fluid (usually of a plasticized plastic) into the valve housing or the valve element of the shut-off nozzle
Data Source
AI summary
A shut-off nozzle for a molding machine, comprising a fluid housing having at least one fluid channel, wherein the at least one fluid channel is designed to guide a-preferably liquid and/or plastic-fluid and a valve element which is mounted rotationally about an axis of rotation relative to the fluid housing and which passes through the fluid channel and has at least one through-opening for the passage of the fluid, wherein a flow cross-section between the fluid channel and the through-opening can be varied by a rotational movement of the valve element and thus a flow rate of the fluid can be influenced, wherein the valve element is mounted in the valve housing in a floating manner along the axis of rotation.