Device for granulating thermoplastic material issuing from orifices

• Main Author: MURB,REINHARDT-KARSTEN
• Format: Patent
• Language: English
• Published: 11.12.2003
• Edition: 7
• Subjects: MAKING GRANULES OR PREFORMS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present invention relates to a device for granulating thermoplastic materials issuing from orifices, said orifices being provided in a substantially circular arrangement in an orifice plate and being swept by blades rotating about a blade carrier shaft, said blades being held by a blade carrier in an oblique position with respect to the radial direction, the blade carrier shaft extending through the centre of the circular arrangement and a cooling medium being supplied to the orifice plate and to the blades for cooling the granulated plastic materials. The blade carrier is disposed with the blade carrier shaft in a substantially round housing extending as far as the orifice plate, a coolant inlet joining into the housing in the tangential direction for producing an annular flow, the blade carrier rotating in the housing, the cooling medium rotating in the housing substantially with a velocity and direction of rotation corresponding to the rotational velocity and direction of rotation of flow openings in the blade carrier, through which flow openings the cooling medium reaches the blades.