Air Bearing Mold Handler for Sand Casting Alignment
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Solution Overview
Problem
Conventional methods for aligning and closing cope and drag sand mold halves in matchplate sand casting require human intervention and manual alignment, which can be inaccurate and labor-intensive, especially with the use of chemically bonded, no-bake sand molds where precision is critical due to the tapered shape of the mold sides.
Innovation Solution
An automated system using a mold closer mechanism with air bearing structures and alignment mechanisms that allow for precise, automated centering and closing of sand mold halves without the need for human operators or expensive vision systems, utilizing hydraulic and pneumatic systems to move and align the mold halves accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated mechanism is used for centering and closing sand mold halves, then productivity and manufacturing precision are improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical alignment mechanisms with a simpler system using air bearings and gravity-assisted self-alignment. The mold halves are lowered under gravity onto air bearings that provide frictionless support, allowing automatic centering without complex mechanical guides or actuators.
Solution Approach 2:
The patent uses air bearings (pneumatic element) to support the mold halves during the closing operation. The air bearing provides a frictionless interface that allows the mold half to float and self-align automatically, eliminating the need for complex mechanical alignment mechanisms while maintaining high precision.
2Manufacturing precision
If articulated joint with high precision is used for rotation, then manufacturing precision is improved, but device complexity and difficulty of manufacture increase
Solution Approach 1:
The patent eliminates the need for precision articulated joints by using air bearings and gravity-assisted self-alignment. Instead of relying on precision mechanical joints to maintain alignment during rotation and inversion, the system uses the natural tendency of the mold half to align under gravity on the frictionless air bearing surface.
Solution Approach 2:
The patent extracts the alignment function from the mechanical joint system and transfers it to the air bearing support system. The air bearing provides the alignment function that would otherwise require complex precision mechanical joints, simplifying the overall mechanism.
3Device complexity
If manual alignment by human operators is used, then device complexity is reduced, but manufacturing precision deteriorates
Solution Approach 1:
The patent implements self-alignment through the interaction of gravity and air bearing support. The mold half automatically centers itself on the air bearing during the lowering operation without requiring manual intervention or complex alignment mechanisms, achieving both simplicity and precision.
4Device complexity
If friction-based mechanical alignment is used, then device complexity is reduced, but manufacturing precision deteriorates due to friction and wear
Solution Approach 1:
The patent uses air bearings to provide frictionless support during the alignment and closing operation. The air bearing eliminates friction between the mold half and the support surface, allowing precise automatic centering without the wear and imprecision associated with friction-based mechanical contacts.
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 system ensures accurate and rapid alignment and closure of sand mold halves, reducing the risk of misalignment and labor costs, while maintaining precision without the need for complex machine vision systems, making it suitable for the harsh conditions of a foundry environment.
Implementation Method 1
An air bearing mechanism that supports at least one of said cope and drag halves permits low friction lateral movement in a plane perpendicular to the closing direction
Data Source
AI summary
The mold handler includes a mold closer mechanism that supports the cope and drag halves and effects movement in a closing direction whereby cope and drag halves are moved into mating alignment with one another. The cope and drag halves are with respective alignment structures that mediate the mating alignment of cope and drag halves as they are moved into mating alignment with one another. An air bearing mechanism that supports at least one of said cope and drag halves permits low friction lateral movement in a plane perpendicular to the closing direction to thereby adjust the relative positional relationship of cope and drag by interaction of the alignment structures.