화학공학소재연구정보센터
Polymer Engineering and Science, Vol.37, No.7, 1113-1126, 1997
Review of Die Lip Buildup in Plastics Extrusion
Die lip buildup, also called plate-out, die drool, die drip, or die peel, refers to the unwanted material accumulation on the open faces of extrusion dies. Since this buildup of material can interfere with extrusion, the processing line must be shut down periodically to clean the die. These shutdowns are costly. The mechanism for die lip buildup is not understood, though there are a variety of proposed explanations. Ways to suppress the problem have been developed by trial. Our review of the literature suggests that there are many mechanisms at play in die lip buildup. For a given industrial problem only a few may matter, but which? Here we use a dimensional analysis to develop a unified approach to die drool problems.