Bell casting using gema’s local clay: Mold performance and gating design influence variations

Dedy Masnur

doi:10.71452/zeg34d84

Authors

Dedy Masnur University of Riau Author

DOI:

https://doi.org/10.71452/zeg34d84

Keywords:

bell making, clay, gating system, ceramic mold

Abstract

Indonesia has a large potential of natural clays, one of which is located in Gema Village, Lipat Kain Subdistrict, Kampar Regency, Riau Province. This study aims to examine the use of Gema clay as a molding material and gating system design for bell making through a number of defects, dimensional accuracy, and hardness values. The molds were designed with a sprue; two sprues; and a sprue and a riser. The Gema village clay was formed into two mold halves, the lower and upper molds. Then, the molds were dried and sintered at 359 °C. Al-4.5wt.%Cu was melted in a crucible furnace to 780 °C, then poured into the mold. The defects were observed, the representative of dimensions and the hardness were measured. The results show there are two types of defects that were observed as a result of the use of clay and channel system: incomplete casting and pin holes. The a sprue and a riser design has a lowest percentage error of 0.35% and a hardness of 56.486 VHN.

References

P. H. Yanti, “Karakterisasi Lempung Alam Desa Gema Teraktifasi Fisika,” vol. 8, no. 1, 2015.

J. Kolczyk and J. Zych, “High temperature strength of ceramic moulds applied in the investment casting method,” Archives of Foundry Engineering, vol. 11, no. 3, pp. 121–124, 2011.

R. Putra, Asnawi, M. Sayuti, and Muhammad, Pengantar Penggolahan Bahan. Alue Awe-Lhoksemawe: Sefa Bumi Persada, 2019.

R. M. Pillai, S. G. K. Pillai, and A. D. Damodaran, “The lost-wax casting of icons, utensils, bells, and other items in South India,” Jom, vol. 54, no. 10, pp. 12–16, 2002, doi: 10.1007/BF02709214.

B. Robert and E. B. Brown, “Discovery Of An Elevent Century Ad Bell-Casting Mold From Venosa (Southern Italy),” vol. 267, no. 1, pp. 1–14, 2004.

S. Suyitno, U. A. Salim, and M. Mahardika, “Aplikasi Cetakan Permanen untuk Meningkatkan Produksi dan Kualitas Produk IKM Pengecoran Logam Kuningan di Ngawen, Sidokarto, Godean, Yogyakarta,” Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement), vol. 2, no. 1, p. 66, 2016, doi: 10.22146/jpkm.22218.

G.-H. Cho, E.-H. Kim, and Y.-G. Jung, “Improving Strength in Casting Mold by Control of Starting Material and Process,” J. Korean Ceram. Soc, vol. 53, no. 5, pp. 541–547, Sept. 2016, doi: 10.4191/kcers.2016.53.5.541.

A. K. Birru, D. B. Karunakar, and M. M. Mahapatra, “A study on hot tearing susceptibility of Al-Cu, Al-Mg, and Al-Zn alloys,” Transactions of the Indian Institute of Metals, vol. 65, no. 1, pp. 97–105, 2012, doi: 10.1007/s12666-011-0112-7.

T. L. Donohue and H. Frye, “Characterization and Correction of Casting Defects,” Technical Report, Advanced Casting Technology, L.L.C., pp. 5–12, 1999.

Adri and D. Masnur, “Studi kekasaran permukaan produk investment casting aluminium minuman kaleng bekas dengan parameter temperatur tuang dan ukuran butir lempung,” Journal Online Mahasiswa, vol. 3, no. 1, pp. 1–6, 2016.

P. Beeley, Foundry Technology. 2001.

Roziqin, “Pengaruh Model Sistem Saluran Pada Proses Pengecoran Aluminium Daur Ulang Terhadap Struktur Mikro Dan Kekerasan,” Teknik Mesin Universitas Wahid Hasyim, vol. 8, no. 1, pp. 33–39, 2012.

A. E. Purkuncoro and A. Taufik, “Pengaruh bentuk salura pada proses pengecoran dengan model dari styrofoam terhadap sifat mekanis alumunium paduan Al-Si-Cu,” Jurnal PASTI, vol. 13, no. 2, p. 177, 2019, doi: 10.22441/pasti.2019.v13i2.007.