Forming different plastic products from a single melt
AssigneeUnivation Technologies, LLC
InventorsDaudi A. Abe, Simon J. White
Life of this patent
Estimating the term…
Abstract
Systems (200) and methods for making different plastic products (202, 204) in a single melting process are provided. A method includes melting a plastic resin in a first extruder (104) to form a melt (106) and transferring at least a portion of the melt to a second extruder (114). Any portion of the melt (106) that is not transferred to the second extruder (114) is formed into a first plastic product (202). Additives (116) are blended with the melt in the second extruder to form a second melt (118), and a second plastic product (204) is formed from the second melt (118).
Claims13
A system for forming different plastic products from a single melt, comprising:
- a main extruder system, comprising:
- a main extruder configured to melt a plastic resin, forming a melt;
- an additive system configured to feed an additive to the melt in the main extruder;
- a first die positioned downstream from the main extruder
- a second product extruder system comprising a second product extruder that is located downstream of the main extruder;
- a diverter valve positioned downstream from the main extruder and between the main extruder and the first die and the second product extruder, the diverter valve configured to:
- receive the melt from the main extruder;
- transfer a first portion of the melt to the first die to form a first plastic product and
- transfer a second portion of the melt to the second product extruder;
- and
- the second product extruder system, comprising:
- the second product extruder configured to blend the second portion of the melt with an additive, forming a second product melt;
- an additive feeder configured to feed the product additive to the second product extruder;
- and
- a second die configured to form a second plastic product from the second product melt;
- wherein the second product extruder has a capacity that is about 75% or less than the capacity of the main extruder.
Dependencies are inferred from the claim text.