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1. WO2020118166 - CORE ROD ASSEMBLY FOR BLOW MOLDING AND HAVING MULTIPLE TEMPERATURE ZONES

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[ EN ]

1 . A core rod assembly for blow molding, comprising:

a core rod head extending longitudinally between first and second ends; a first fluid pathway extending along a first length of the core rod head; and a second fluid pathway extending along a second length of the core rod head, wherein the first and second fluid pathways are fluidly isolated from each other, and further wherein a portion of the first fluid pathway is longitudinally offset from the second fluid pathway.

2. The core rod assembly of claim 1 , wherein the core rod head includes an inner surface, and wherein the first fluid pathway is positioned along, and in thermal communication with, the inner surface.

3. The core rod assembly of any preceding claim, wherein the core rod head includes an outer surface, and wherein the second fluid pathway is positioned along the outer surface.

4. The core rod assembly of any preceding claim, further comprising:

a core rod bubbler positioned at least partially within the core rod head, wherein the first fluid pathway is at least partially defined by the core rod bubbler and the core rod head.

5. The core rod assembly of claim 4, further comprising a valve stem positioned at least partially within the core rod bubbler and a valve supported at one end of the valve stem.

6. The core rod assembly of any preceding claim, further comprising:

a core rod body, wherein the core rod head is at least partially received within the core rod body, and further wherein the second fluid pathway is at least partially defined by the core rod body and the core rod head with the second fluid pathway being in thermal communication with a portion of the core rod body.

7. The core rod assembly of any preceding claim, wherein the first length at least partially overlaps the second length.

8. The core rod assembly of any preceding claim, wherein the first fluid pathway defines a first zone along a first length of the core rod assembly and the second fluid pathway defines a second zone along a second length of the core rod assembly, wherein the first zone is longitudinally offset from the second zone, and wherein the first fluid pathway is configured to supply a first temperature controlled fluid at a first temperature to the first zone and the second fluid pathway is configured to supply a second temperature controlled fluid at a second temperature to the second zone.

9. The core rod assembly of claim 8, wherein the first fluid pathway includes at least one first helical leg and wherein the first zone is defined by the at least one first helical leg.

10. The core rod assembly of claim 8 or 9, wherein the second fluid pathway includes at least one second helical leg and wherein the second zone is defined by the at least second helical leg.

1 1. The core rod assembly of any of claims 8-10, wherein the first zone is located distally of the second zone.

12. A method of blow molding an article, comprising:

forming a preform over first and second portions of a core rod assembly, the preform including a body portion positioned over the first portion of the core rod assembly and a neck portion positioned over the second portion of the core rod assembly;

controlling a first temperature of the body portion of the preform via a first temperature-controlled fluid in thermal communication with the first portion of the core rod assembly; and

controlling a second temperature of the neck portion of the preform via a second temperature-controlled fluid in thermal communication with the second portion of the core rod assembly, wherein the second temperature-controlled fluid is fluidly isolated from the first temperature-controlled fluid, and wherein the first temperature is greater than the second temperature.

13. The method of claim 12, wherein the first portion of the core rod assembly is longitudinally offset from the second portion.

14. The method of claim 13, wherein the first portion is located distally of the second portion.

15. The method of any preceding claim, wherein the first temperature-controlled fluid travels in a helical manner along at least a partial longitudinal length of the core rod assembly.

16. The method of any preceding claim, wherein the second temperature-controlled fluid travels in a helical manner along at least a partial longitudinal length of the core rod assembly.

17. The method of any preceding claim, wherein the first temperature is greater than the second temperature.

18. A core rod as shown and described herein.

19. A blow molding system as shown and described herein.

20. A method of blow molding an article as shown and described herein.