An Experimental Study on Effects of Hot Plate Welding Parameters on Toughness Energy and Tensile Strength in Weld Line of Thermoplastic Parts

Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

مقاله 4، دوره 3، شماره 1، آذر 2010، صفحه 31-40   

نوع مقاله: Persian

نویسندگان

Amir Hooshmandpoor¹؛ abdol Mohammad Rezavand^{* 2}؛ Mehdi Nazari Marveyan³

¹M.Sc., Manufacturing Department, Graduated School Faculty, Islamic Azad University, Dezful Branch

²Assistant Professor, Manufacturing Department, Graduated School Faculty, Islamic Azad University, Dezful Branch

³Lecturer, Mechanical Engineering, Emam Hossein University, Tehran.

چکیده

Integral production of the thermoplastic parts with complicated geometric shapes by the processes such as injection molding and extrusion is not economical. It is better to divide the final shape into more simple parts and after production join them by an appropriate welding process. This research aims to study the tensile strength and toughness energy of high- density polyethylene parts which have been welded in different temperatures, pressures and times using hot plate method. The standard samples are separated from the welded samples by using the laser cutting device according to the tension standard ASTM D638-1 and then tested by the tension device. The results show that the tensile strength of welded parts is less than, and the toughness energy is more than not welded parts. Also, the tensile strength and the toughness energy increase with increasing the time and maintenance temperature. However, increasing the pressure causes the molten material between the two parts come out and overflow into the part edges. This results in decreasing the tensile strength and the toughness energy of the weld line.

کلیدواژه‌ها

Hot plate welding؛ Thermoplastics؛ High-density polyethylene؛ Tensile strength؛ Toughness energy

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