Atomized Water Cooling for Foundry Molds
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Solution Overview
Problem
Conventional cooling systems for molding fixtures face issues such as thermal shock, leaks due to excess pressure, and inefficiencies in heat removal, particularly when using water, which can damage molds and compromise operation.
Innovation Solution
A cooling system that combines water treatment and compressed air to produce atomized water under controlled pressure, ensuring consistent and repeatable cooling by maintaining a pressure difference between the water and air lines, preventing thermal shocks and leaks, and optimizing the water flow rate through a calibrated nozzle and three-way connector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If water is used as the heat removal fluid in cooling circuits, then heat removal effectiveness is improved, but thermal shock is generated that can crack the mold and cause irreparable damage
Solution Approach 1:
The invention changes the physical state of water from liquid to vapor by heating it to boiling point in an enclosed chamber, then introduces the vapor rather than liquid water to the mold surface. This parameter change (phase transition) allows heat transfer while avoiding the thermal shock caused by liquid water contact.
Solution Approach 2:
The invention introduces steam as an intermediary substance between the heat source and the mold. The steam acts as a mediator that transfers heat effectively while its gaseous state prevents direct thermal shock to the mold surface, unlike liquid water which causes cracking.
2Temperature
If water cooling systems are used, then heat removal effectiveness is improved, but leaks occur at seals joining components that compromise correct operation
Solution Approach 1:
The invention uses steam as an intermediary that can be introduced into the mold cavity without requiring tight seals. The steam delivery system uses flexible hoses and spray nozzles that are inherently leak-resistant, eliminating the seal problems associated with rigid water cooling circuits.
Solution Approach 2:
The invention employs a pneumatic-like system using steam under pressure delivered through flexible conduits and spray nozzles. This approach replaces the rigid hydraulic water cooling system with flexible steam delivery, eliminating seal interfaces that are prone to leakage.
3Reliability
If compressed air is used in cooling circuits, then thermal shock and leaks are avoided, but heat removal effectiveness is reduced compared to water systems
Solution Approach 1:
The invention utilizes the phase transition of water to steam (vaporization) to achieve effective heat transfer. The steam condenses on the cooler mold surface, releasing latent heat of condensation which is much more effective than sensible heat transfer from hot air, while avoiding thermal shock.
Solution Approach 2:
The invention changes the temperature and phase parameters of water, heating it to boiling point and converting it to steam, then delivering it to the mold. This parameter transformation allows the system to achieve water-like heat removal effectiveness while maintaining the safety advantages of air cooling.
4Temperature
If heated water exits from the mold, then cooling function is achieved, but suitable treatment is required for disposal or reuse
Solution Approach 1:
The invention extracts and removes the cooling medium (steam) from the mold cavity after it has performed its cooling function. The condensed water is collected and can be easily disposed of or reused, eliminating the need for complex treatment systems required by conventional water cooling circuits.
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 system achieves precise and repeatable cooling, reduces production discards, lowers energy consumption, shortens cooling times, and enhances productivity by using humidified air with a lower air pressure, while being compatible with existing fixtures and immune to thermal shocks and leaks.
Implementation Method 1
water treatment means 11, which are arranged on a water supply line
Implementation Method 2
means for pressurizing the treated water 13
Implementation Method 3
a device 14 for mixing air with the treated water, and for the controlled ejection of atomized water under pressure
Implementation Method 4
the controlled ejection of atomized water under pressure toward a cooling circuit 16 of a molding fixture 15
Data Source
AI summary
A cooling system (10) for molding fixtures, and particularly for foundry molds, comprising: —water treatment means (II)—compressed air generation means (12)—means (13) for pressurizing the treated water—a device (14) for mixing air with the treated water, and for the controlled ejection of atomized water under pressure toward a cooling circuit (16) of a molding fixture.