Apparatus for granulating hot cut
AssigneeEREMA Engineering Recycling Maschinen und Anlagen Gesellschaft m.b.H.
InventorsKlaus Feichtinger, Manfred Hackl, Gerhard Wendelin
Life of this patent
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Abstract
An apparatus for granulating hot cut, in particular thermoplastic resin material, the material strands melted by an extruder being knocked off into granule pellets in a granulating housing by rotating knives disposed on a shaft driven by way of a motor, the granule pellets being picked up by a cooling medium flowing in the granulating housing, cooled and discharged out of the granulating housing, characterized in that a flow opening establishing a continuous fluid connection between the inside of the granulating housing and the outside environment is designed between the shaft and the region of the granulating housing in which the shaft penetrates the granulating housing.
Claims13
An apparatus for hot cut granulation of material, configured for strands of the material which has been melted in an extruder to be introduced thereto, comprising:
- a granulating housing configured for the strands to be introduced into the granulating housing;
- a rotatable shaft;
- rotatable knives disposed in the granulating housing and disposed on the shaft, wherein the rotatable knives are configured to cut the strands into granulate particles;
- a coolant inlet and a coolant outlet, configured for coolant to flow through the granulating housing in such a way that the granulate particles are picked up and cooled by the coolant, and the granulate particles are discharged from the granulating housing through the coolant outlet along with the coolant;
- and
- a flow-through opening, wherein the shaft penetrates the granulating housing through the flow-through opening, wherein the flow-through opening abuts immediately against the shaft, and wherein the flow-through opening establishes a fluid connection between an interior of the granulating housing and an ambient atmosphere of the apparatus, wherein, during operation, a pressure interior of the granulating housing is at a vacuum in comparison with the ambient atmosphere of the apparatus, wherein the vacuum acts to draw in air from the ambient atmosphere to thereby create an air current such that the air current enters the granulating housing through the flow-through opening at a rate to prevent any of the coolant from exiting the granulating housing through the flow-through opening, such that the air current creates a seal against the escape the coolant from the flow-through opening.
Dependencies are inferred from the claim text.