MAKSIMUM TEGANGAN THERMAL PADA PROSES PENCELUPAN CERAMIC STALK DI LOW PRESSURE DIE CASTING MACHINE

Hendra, Hendra (2014) MAKSIMUM TEGANGAN THERMAL PADA PROSES PENCELUPAN CERAMIC STALK DI LOW PRESSURE DIE CASTING MACHINE. MECHANICAL, 3 (1). pp. 23-31. ISSN 2087-1880

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Abstract

Low pressure die casting is process to make the xi-simmetric product such as cylinder head, piston, brake drum and etc. The process is injected the molten metal with high speeds and pressure into a metallic die. The low pressure die casting process has some advantages as a low-cost and high-efficiency precision forming technique. The low pressure die casting having the permanent die and filling systems are placed over the furnace containing the molten alloy. The filling of the cavity is obtained by forcing using the pressurized gas to order a rise the molten metal into a tube, which connects the die to the furnace. The tube called stalk made from ceramics because ceramics has high temperature resistance and high corrosion resistance. However, care should be taken for the thermal stress when the tube is dipped into the molten metal. To reduce the risk of fracture it is important because fracture may happen due to the thermal stresses. In this paper, thermo-fluid analysis is performed to calculate surface heat transfer coefficient. Then, the finite element method is applied to consider the thermal stresses when the stalk is dipped into the crucible with varying the dipping speeds. It is found that the stalk with slowly dipping is better than fast dipping to reduce the thermal stress.

Item Type: Article
Subjects: T Technology > T Technology (General)
Divisions: Faculty of Engineering > Journal
Depositing User: 021 Nanik Rahmawati
Date Deposited: 26 Mar 2014 16:01
Last Modified: 26 Mar 2014 16:01
URI: http://repository.unib.ac.id/id/eprint/6879

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