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Abstract
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Article Information:
Evaluation of the Effective Baking Conditions for Grade 3 Nigerian Acacia Species Bonded Foundry Sand Cores
Nuhu A. Ademoh and A.T. Abdullahi
Corresponding Author: Nuhu A. ademoh
Submitted: 2009 November, 02
Accepted: 2009 December, 07
Published: 2010 September, 10 |
Abstract:
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The most effective economical baking conditions w ere determined for foundry cores bonded with
the grade 3 Nigerian acacia species exudates. Silica sand base cores bonded with the material were oven baked
at temperatures ranging from 160 to 250ºC for varying periods oven cooled and then subjected to tensile
strength tests to ascertain the best baking conditions for different alloy castings. The experimental core
specimens were in accordance with foundry test standard, shaped like figure number eight. They were tested
with standard universal strength machine equipped with attachment for gripping the cores and an instantaneous
meter from which the test values were read. The result were compared with established standard foundry core
property table which showed that the class V iron/steel cores are best made with 3% acacia bonded silica sand
baked at 160ºC for 1 h. For magnesium cores, sand bonded with 4.5% acacia baked at 160ºC for 1-2 h was
optimum. For class IV iron/steel cores 4.5% acacia bonded sand baked at 180ºC for 1 hour was optimal. Sand
bonded with 4.5% grade 3 acacia baked at 200ºC for 1.0-2.0 h was optimum for copper, aluminium, classes II
and III iron/steel cores. Sand bonded with 8.0-13.0% grade 3 N igerian acacia species baked at 200ºC for 1.5-2
h was found most effective for class I iron and steel cores.
Key words: Acacia grade 3, baking, cores, oven, temperature, ,
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Cite this Reference:
Nuhu A. Ademoh and A.T. Abdullahi, . Evaluation of the Effective Baking Conditions for Grade 3 Nigerian Acacia Species Bonded Foundry Sand Cores. Research Journal of Applied Sciences, Engineering and Technology, (6): Page No: 504-507.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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