Patent ID: 6592350
Filing Date: 2003-07-15
Classification: B29B,B29K,Y10S

Abstract:
An underwater pelletizer for granulating thermoplastics, comprising:at least one extruder; at least one die plate connected to the extruder and having die holes for extruding thermoplastics in the form of single strands; at least one motor-driven cutting tool rotating about a horizontal pivot axis for cutting the strands in short pieces in a cutting plane in parallel relation to an exit plane of the die plate, thereby forming a granulated product; means forming a chamber which is filled with cooling water streaming through the chamber, said exit plane of the die plate and said cutting tool being positioned within the chamber, said chamber having a cooling water inlet, which is arranged above the pivot axis of the cutting tool, and an outlet, arranged beneath the pivot axis of the cutting tool, for discharge of a mixture of water and granulated product, said outlet being configured as a free discharge opening; and a separator connected to the outlet for separating the granulated product from the cooling water, said separator being positioned immediately underneath the outlet.