Abstract
Three dimensional (3D) printing is one of the fast growing printer fields and most widely used process among several processes is known as Fused Deposition Modelling (FDM). The process heats up a thermoplastic filament to the melting point by a heating device and then extrudes the melted material through a small hole. The extruded material is placed, layer by layer, to create a three dimensional object. The heating/extruding device is referred to as "hotend" in industry. One of the current shortcomings of this process is an inability to use the materials which have a high temperature range (400°C ~ 500°C) such as PEEK (Polyether Ether Ketone) which is so called super engineering plastic. It is at the higher end of the temperature spectrum, generally with very high mechanical strength and thermal resistance. It is used in high temperature, high stress applications, in harsh environments, and low to medium volume production. We decided to take up the momentous challenge of this high temperature hotend. There have been many problems to be solved to achieve the goal and we are sharing some of the issues we had to deal with.
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