Patent ID: 6217802
Filing Date: 2001-04-17
Classification: B26D,B29B,Y10T

Abstract:
A method of advancing knives against a die in an underwater polymer pelletizing system, wherein the knives are rotated against the die and have a predetermined useful life, comprising:inputting, into a programmable controller, a first predetermined time period a first predetermined advance distance for the knives to be advanced;advancing the knives by the first predetermined advance distance toward the die upon or after the expiration of the first predetermined time period;advancing the knives by one or more additional predetermined advance distances upon or after the expiration of additional predetermined time periods;providing an alert when the sum of the first and additional predetermined advance distances corresponds to a predetermined total distance, or when the sum of the first and additional predetermined time periods corresponds to a predetermined total time, wherein the predetermined total distance or the predetermined total time corresponds to a useful life of the knives; andreplacing the knives.