Development of a semi-automatic macadamia cracking machine

Main Article Content

Suphan Yangyuen Juckamas Laohavanich

Abstract

Macadamia is the king of nuts and popular around the world. Cracking is vital to extract the whole nut and increases the commercial value of the product. Therefore, a semi-automatic macadamia cracking machine was designed and assessed. It was modified from a manual nut cracker. Such a machine was expected to have a higher throughput and produce a higher quality output. The key part of this machine consisted of a drive blade set and a nut discharge set, which were both upgraded so that they were driven by an electric motor. In extant machines, both these tasks are manual. We tested blade speeds of up to 22 rpm, macadamia nut diameters from 21 to 27 mm and the method to feed the nuts into the cracking section. The optimum cracking condition was found to be a 19 rpm blade speed or 19 cracking strokes per minute. The feeder handled 99% of the nuts successfully leading to a nut throughput of 10.6 kg/h, with 88% whole kernels. The best cracking performance was found on nut diameters in the range of 25 to 27 mm with a blade compression depth of 2.5 mm.

Keywords

Article Details

How to Cite
Yangyuen, S., & Laohavanich, J. (2018). Development of a semi-automatic macadamia cracking machine. Engineering and Applied Science Research, 45(4), 256-261. Retrieved from https://www.tci-thaijo.org/index.php/easr/article/view/99881
Section
ORIGINAL RESEARCH

References

[1] Borompichaichartkul C, Luengsode K, Chinprahast N, Devahastin S. Improving quality of macadamia nut (Macadamia integrifolia) through the use of hybrid drying process. J Food Eng. 2009;93(3):348-53.

[2] Weinert IAG. Macadamia nut processing. South Africa: The Southern African Macadamia Growers Association Yearbook; 1993.

[3] Gilberto CB, Sandra MC, Tetuo H, Jayme TP, Almeida N. Mechanical behaviour of macadamia nut under compression loading. J Agr Eng Res. 1999;72(3):239-45.

[4] Thongjan P, Amarerg S, Changrue V. Development of macadamia nut cracker using impact mechanism for farmer use. Agricultural Science Journal. 2011;42(S3):454-7. [In Thai].

[5] Krissanasrani S. Macadamia [Internet]. Thailand: Agricultural Engineering Research Center, Department of Agriculture; 2017 [cited 2017 Sep]. Available from: https://kanchanapisek.or.th/kp6/Ebook /BOOK36/pdf/book36_5.pdf. [In Thai].

[6] Paosantadpanich C, Amaroek S, Prapat P, Chomchiangkum P. Study on macadamia nut drying using alternate hot air dryer. Agricultural Science Journal. 2011;42(S1):563-60. [In Thai].

[7] Ghafari A, Chegini GR, Khazaei J, Vahdati K. Design, construction and performance evaluation of the walnut cracking machine. International Journal of Nuts and Related Sciences. 2011;2(1):11-6.

[8] Polat R, Tarhan S, Çetin M, Atay U. Mechanical behaviour under compression loading and some physical parameters of Japanese quail (Coturnix coturnix japonica) eggs. Czech J Anim Sci. 2007;52(2):50-6

[9] Mohsenin NN. Physical properties of plant andanimal material. New York: Gordon and Breach; 1970.

[10] Yangyuen S, Laohavanich J, Chaiwchanwattana C, Wiriyaumpaiwong S. Efficient strip belt shelling and air suction cleaning units for sunflower seeds. Adv Mater Res. 2014;1044-1045:778-83.