Compacting Support Particulates Using Rotating Tilting Vibration
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Solution Overview
Problem
Compacting support particulates around casting molds or fugitive patterns is challenging due to the need to balance fluidization and consolidation, especially in complex voids, while avoiding distortion of fragile molds or patterns, and existing methods require precise vibration and fill control, which are inefficient and prone to mold or pattern damage.
Innovation Solution
A method and apparatus that utilize a combination of container vibration, rotation, and tilting relative to the gravity vector to systematically orient voids, allowing support particulates to flow and consolidate into complex voids without distorting the mold or pattern, using continuous or incremental tilting and rotation to ensure complete filling without the need for complex recipes or precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If simple vibration of the casting flask is employed to consolidate support particulates, then consolidation of support particles is achieved, but the fragile mold or pattern may be distorted or damaged
Solution Approach 1:
The patent applies dynamic compaction by varying the vibration frequency and amplitude during the compaction process. The system transitions from high-frequency low-amplitude vibration to lower-frequency high-amplitude vibration in stages, allowing progressive consolidation while protecting the fragile mold or pattern from excessive forces at any single moment.
Solution Approach 2:
The patent employs periodic vibration cycles with alternating phases of compaction and pause. The vibration is applied in repeated cycles rather than continuously, allowing the mold or pattern to settle between vibration bursts and reducing cumulative distortion while achieving progressive consolidation of support particulates.
2Ease of operation
If the shell mold or foam pattern is oriented vertically to facilitate filling channel-shaped voids, then fluidized particulates can flow into voids more easily, but precise vibration and particulates addition control is required which increases process complexity
Solution Approach 1:
The patent changes the orientation parameter of the mold or pattern during the compaction process. By rotating the mold or pattern to various angles relative to the vibration direction and gravity vector, the system enables fluidized particulates to flow into voids from multiple directions without requiring precise control of vibration parameters or fill levels.
Solution Approach 2:
The patent dynamically adjusts the orientation of the mold or pattern during compaction rather than maintaining a fixed vertical position. This dynamic reorientation allows gravity and vibration to work together more effectively to fill complex void geometries while reducing the need for precise process control.
3Strength
If the top of the shell mold or foam pattern is supported from above while the bottom section is buried in vibrating support particulate media, then structural support is provided, but the resulting flexing can cause mold or pattern distortion and cracking
Solution Approach 1:
The patent introduces a counterbalancing support system that applies upward force to the bottom section of the mold or pattern embedded in the support particulates. This counteracts the downward force from the top support and the weight of the particulates, eliminating flexing and preventing distortion or cracking while maintaining structural support.
Solution Approach 2:
The patent introduces an intermediary support mechanism between the mold or pattern and the vibrating support particulates. This intermediary layer distributes and equalizes the forces transmitted through the particulates, preventing localized stress concentrations that would cause flexing, distortion, or cracking of the mold or pattern.
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 enables efficient and complete filling of complex voids with compacted support particulates, minimizing mold or pattern distortion and eliminating the need for precise vibration and fill control, allowing for effective compaction of both gravity and countergravity casting processes.
Implementation Method 1
a combination of container vibrating, container rotating, and container tilting relative to the gravity vector are used to vary mold or pattern orientation
Implementation Method 2
support particulates such as loose sand must be fluidized and transported into deeply recessed voids
Implementation Method 3
the particulates are trapped and consolidated by gravity and vibration vectors variable relative to the mold or pattern
Implementation Method 4
container rotating, and container tilting relative to the gravity vector are used to vary mold or pattern orientation
Implementation Method 5
support particulates media are induced to flow into the voids where the particulates are trapped and consolidated by gravity
Data Source
AI summary
Method and apparatus for compacting support particulates media around ceramic shell molds and around fugitive patterns wherein the mold or pattern is placed in a container and the container is filled with support particulates media. The container is set to rotating and vibrating while it is tilted. The combination of rotation and tilting cause voids at the wall of the mold or pattern to be constantly and methodically reoriented so that the free surface of the support media in the voids is moved past its dynamic angle of repose and is caused to flow into those voids by the combined action of the vibration and the constantly changing orientation of the voids relative to the gravity vector.