초록 ▼

In an underwater pelletizing die plate or an extruder for the pelletizing of thermoplastics, the front face of the die plate, which is provided with a wearing protection layer and over which pass the pelletizing knives, being disposed under water, and heat isulation means being provided on the pelle

In an underwater pelletizing die plate or an extruder for the pelletizing of thermoplastics, the front face of the die plate, which is provided with a wearing protection layer and over which pass the pelletizing knives, being disposed under water, and heat isulation means being provided on the pelletizing die plate, good axial insulation is to be achieved, accompanied by uniform temperature distribution in the radial direction, it being provided to this end that an insulating layer is disposed between the external upper side of the actual pelletizing die plate and the wearing protection layer, the wearing protection layer being positioned, relative to the insulating layer, with radial play and without axial pressure or with little axial pressure, respectively.

대표청구항 ▼

An underwater pelletizing die plate for an extruder that pelletizes thermoplastics, said die plate comprising said pelletizing die plate defining a plurality of die plate holes extending through a face of said pelletizing die plate, an insulating layer on said face, said insulating layer having a pl

An underwater pelletizing die plate for an extruder that pelletizes thermoplastics, said die plate comprising said pelletizing die plate defining a plurality of die plate holes extending through a face of said pelletizing die plate, an insulating layer on said face, said insulating layer having a plurality of insulating die holes aligned with said die plate holes, a wear protection layer on said insulating layer, said wear protection layer having a plurality protection layer die holes aligned with said insulating die holes, said protection layer die holes being larger than said insulation die holes, mounting means mounting said wear protection layer on said insulating layer, and wherein when said wear protection layer is cooled radial displacement of said wear protection layer towards the center of said wear protection layer takes place relative to said insulation layer and said die plate.