Core Manufacturing Apparatus with Fluid Heating and Hot Air Injection
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Solution Overview
Problem
Existing core manufacturing methods using inorganic binders face challenges in efficiently producing large outer cores due to high heat requirements and long processing times, which can lead to environmental pollution and quality deterioration.
Innovation Solution
A core manufacturing apparatus that reheats fluid circulated through a mold using both external and internal heaters, and directly injects hot air into the core using a blow pin to uniformly maintain temperatures and reduce sintering time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If inorganic binder is used to manufacture large outer cores, then environmental pollution is reduced, but manufacturing time and heat requirements increase significantly
Solution Approach 1:
The heating process is segmented into multiple stages with different temperature profiles. The method involves preheating, main heating, and finishing stages, each with specific temperature ranges and durations. This segmented approach allows efficient heat distribution throughout the large core while maintaining productivity
Solution Approach 2:
The sand mixture is preheated before being introduced into the mold cavity. This preliminary heating action reduces the thermal shock to the inorganic binder and accelerates the overall curing process, compensating for the naturally slower setting time of inorganic binders in large cores
2Object-affected harmful factors
If inorganic binder is used for large outer cores, then environmental friendliness is improved, but heat requirement increases
Solution Approach 1:
Different regions of the core receive different heating intensities based on their specific requirements. The method applies higher heating power to thicker sections and maintains lower temperatures in thinner sections. This localized heating approach reduces overall energy consumption while ensuring complete curing of the inorganic binder throughout the large core
Solution Approach 2:
The heating process maintains continuous thermal action throughout the curing period. The method involves sustained heating at optimized temperature profiles without interruption, ensuring continuous activation of the inorganic binder setting reaction. This continuous useful action improves energy efficiency by avoiding repeated heating cycles
3Object-affected harmful factors
If inorganic binder is used to mold large outer cores, then environmental impact is minimized, but temperature uniformity across cavities becomes difficult to maintain
Solution Approach 1:
The heating system incorporates feedback control through temperature sensors positioned at multiple locations within the mold. The system continuously monitors temperature distribution across different cavities and automatically adjusts heating element output to maintain uniform temperatures. This feedback mechanism ensures consistent curing of the inorganic binder throughout the large core despite variations in cavity size and shape
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 enhances productivity and quality of large outer cores by ensuring consistent temperature distribution and reducing the core manufacturing cycle, while minimizing environmental impact.
Implementation Method 1
a first heater that is connected to the heating line and that heats the fluid that is released from the mold to the heating line
Implementation Method 2
a second heater that is provided inside the mold so as to be adjacent to an intermediate position of the inner fluid channel and that heats the fluid flowing through the inner fluid channel
Implementation Method 3
a hot-air supply device that supplies hot air into the mold to solidify the mulling sand introduced into the mold
Implementation Method 4
a hollow blow pin inserted through the upper mold to extend to a central portion of each cavity such that the supplied hot air is injected into a central portion of the core that is to be solidified
Data Source
AI summary
A core manufacturing apparatus using an inorganic binder includes a mulling sand feeder that supplies mulling sand comprising sand and the inorganic binder, a mold that receives the mulling sand from the mulling sand feeder and molds the mulling sand into a core, and a mold heating device that heats the mold. The mold includes an upper mold and a lower mold and has a plurality of cavities formed therein in which the mulling sand is deposited. The mold further includes an inner fluid channel through which fluid flows.