Device for cooling, granulating and drying molten strands of synthetic thermoplastic material emerging from dies
AssigneeRieter Automatik GmbH
InventorFriedrich Hunke
Life of this patent
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Abstract
A device for cooling, granulating and drying molten strands of synthetic thermoplastic material emerging from dies includes a cooling unit for applying a cooling liquid to the strands and a granulator housing with a cutting roll for granulating the strands. The granulator housing is connected to an outlet duct with a sieve to separate the thermoplastic material from the cooling liquid. The sieve is arranged so that the granules separated from the strands by the cutting roll impinge directly on the sieve at basically the same speed as that imparted to the granules by the cutting roll.
Claims8
A device for cooling, granulating and drying molten strands (1) of synthetic thermoplastic material emerging from dies which comprises a cooling unit (6, 7;
- 25) for applying a cooling liquid onto the strands, a granulator housing (12) which is connected to said cooling unit and contains a cutting roll (18) for receiving and granulating the strands and ejecting granules along a path, and an outlet duct (21) which is connected to said granulator housing and provided with a sieve (22, 24, 29, 32) to separate the thermoplastic material from the cooling liquid, wherein the sieve (22, 24, 29, 32) is positioned in the path along which the granules (19) are ejected by the cutting roll (18) so that all the granules impinge directly on the sieve (22;
- 24;
- 29;
- 32) at essentially the same speed as the speed imparted to the granules (19) by the cutting roll (18), by which said speed throws the cooling liquid almost completely from the granules.
Dependencies are inferred from the claim text.