Dual Nozzle Molten Metal Pouring Box
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Solution Overview
Problem
Conventional molten metal pouring boxes with single nozzles suffer from flow rate dependency on the head parameter, leading to inconsistent metal flow and nozzle clogging due to temperature fluctuations during non-pouring delays, and require time-consuming and difficult nozzle replacement in automated mold casting systems.
Innovation Solution
A molten metal holding and pouring box with a pyramidal-shaped lower section featuring a unitary dual nozzle assembly made of thermally conductive material, insulated from the box's structure to maintain constant temperature and prevent clogging, and allowing adjustable nozzle spacing for accommodating varying mold configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single nozzle is used in a rectangular holding box, then the structure is simple, but the flow rate is directly proportional to the square root of the head parameter, causing inconsistent metal flow
Solution Approach 1:
The single nozzle is divided into two separate nozzles arranged side by side in the bottom of the holding box. Each nozzle has its own stopper rod for independent control, allowing the metal flow to be divided into two consistent streams rather than relying on a single variable flow rate that depends on the head parameter.
2Device complexity
If the nozzle is exposed to the external environment during non-pouring delays, then the structure is simple, but the nozzle temperature drops causing slag to freeze and clog the nozzle
Solution Approach 1:
A thermally conductive material is introduced as an intermediary between the nozzle and the molten metal. This material ensures continuous thermal contact, allowing the nozzle to be maintained at metal temperature even when not in use, preventing slag freezing and clogging without requiring complex insulation systems.
3Ease of manufacture
If fixed nozzle spacing is used, then the manufacturing is simple, but the system cannot accommodate varying mold configurations
Solution Approach 1:
The nozzle assembly is designed with adjustable spacing between the two nozzles. The stopper rods and their positioning mechanisms allow for dynamic adjustment of the nozzle configuration to match different mold arrangements, providing versatility while maintaining a relatively simple overall structure.
4Productivity
If nozzle replacement is done in automated casting systems, then the productivity is high, but the nozzle replacement is time-consuming and difficult
Solution Approach 1:
The nozzle assembly is segmented into replaceable components with standardized interfaces. The dual nozzle configuration allows one nozzle to be replaced while the other remains in place, or both can be replaced together as a unit, reducing the time required compared to replacing a single nozzle in a conventional system.
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 solution provides a relatively constant flow rate of molten metal through dual nozzles, reducing nozzle clogging and enabling easier replacement of the nozzle assembly, while maintaining efficient metal pouring and casting processes even with changing mold configurations.
Implementation Method 1
The pyramidal-shaped lower section provides for a relatively constant flow of the molten metal being poured from the box through each of the two nozzles in the unitary dual nozzle assembly
Implementation Method 2
unitary dual nozzle assembly is constructed of a thermally conductive material and insulated from contact with the lower inverted pyramidal-shaped section while being in thermal contact with the molten metal contained within the box
Data Source
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AI summary
A molten metal holding and pouring box with a rectangular-shaped upper section and a pyramidal-shaped lower section provides a relatively constant flow of molten metal being poured from the box through each of two bottom nozzles into two separate foundry molds at the same time. The two bottom nozzles are contained in a unitary dual nozzle assembly that facilitates replacement as required by wear, or a change in location of the sprue cups in the two separate foundry molds being filled with molten metal.