Reduced material container and method of forming same

Patent metadata

Field	Value
Publication number	US-11833729-B2
Application number	US-202017596706-A
Country	US
Kind code	B2
Filing date	Jun 23, 2020
Priority date	Jun 28, 2019
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

Systems and methods for making a reduced material container (105) are provided that hold a preform (130) adjacent to an open end (165) of the preform (130), stretch the preform (130), close a mold (110, 120) about the stretched preform (175) to form a truncated preform (185), and introduce a pressurized fluid (160) into the truncated preform (185) to expand the truncated preform (185) and form the reduced material container (105). A stretch rod (125) can be inserted into the preform (130) to mechanically stretching the preform (130). The mold (110, 120) accepts the preform (130) at a first end (135) thereof, has an open state and a closed state, and the closed state forms a cavity (140) defining an internal surface (145) having a second end (150) located remotely from the first end (135). A first length (155) is defined by a distance between the first end (135) and the second end (150), the stretch rod (125) mechanically stretching the preform (130) to a second length (170), the second length (170) being greater than the first length (155).

First claim

What is claimed is:

1. A system for making a reduced material container comprising:
a mold configured to accept a preform at a first end thereof, the mold having an open state and a closed state, the closed state forming a cavity defining an internal surface, the internal surface having a second end located remotely from the first end, where a first length is defined by a distance between the first end and the second end;
a blow nozzle configured to receive a pressurized fluid and dispense the pressurized fluid to the preform; and
a stretch rod configured to mechanically stretch the preform to a second length, the second length being greater than the first length;
wherein the stretch rod is operable to stretch the preform to the second length when the mold is in the open state to form a stretched preform, wherein the stretch rod is vented, the stretch rod being further operable to be withdrawn from the stretched preform, the mold operable to move from the open state to the closed state to truncate a portion of the stretched preform at the second end to form a truncated preform, the blow nozzle operable to transfer the pressurized fluid into the truncated preform to urge the truncated preform to expand toward the internal surface of the mold cavity to thereby form the reduced material container.

2. The system of claim 1 , further comprising a pressure source configured to provide the pressurized fluid.

3. The system of claim 2 , wherein the pressurized fluid is a gas.

4. The system of claim 2 , wherein the pressurized fluid is a liquid.

5. The system of claim 4 , wherein the pressure source has an inlet, a chamber, an outlet, and a mechanically driven piston-like device moveable within the chamber in a first direction to draw the liquid into the chamber through the inlet and moveable in a second direction to urge the liquid out of the chamber through the outlet as the pressurized fluid.

6. The system of claim 5 , wherein the piston-like device is one of a piston, a pump, and an accumulator.

7. The system of claim 1 , further comprising a holder configured to hold the preform adjacent to an open end of the preform and contact at least a portion of a finish of the preform.

8. The system of claim 7 , wherein the holder is coupled to the mold.

9. The system of claim 7 , wherein the holder is an integral portion of the mold.

10. The system of claim 7 , wherein the holder is coupled to the blow nozzle.

11. The system of claim 7 , wherein the holder is an integral portion of the blow nozzle.

12. A method of making a reduced material container comprising:
holding a preform adjacent to an open end of the preform;
stretching the preform to form a stretched preform, wherein stretching the preform to form the stretched preform includes inserting a stretch rod into the preform and mechanically stretching the preform;
closing a mold about the stretched preform thereby truncating the stretched preform to form a truncated preform; and
introducing a pressurized fluid into the truncated preform to expand the truncated preform toward an internal surface of the mold to form the reduced material container, wherein during the introducing of the pressurized fluid into the truncated preform a gas disposed within the truncated preform is vented through a passage of the stretch rod.

13. The method of claim 12 , wherein holding the preform adjacent to the open end of the preform includes using a holder to contact at least a portion of a finish of the preform.

14. The method of claim 13 , wherein the mold is configured to accept the preform at a first end thereof, the mold having an open state and a closed state, the closed state forming a cavity defining the internal surface, the internal surface having a second end located remotely from the first end, where a first length is defined by a distance between the first end and the second end, the stretch rod mechanically stretching the preform to a second length, the second length being greater than the first length.

15. The method of claim 12 , wherein the pressurized fluid is a gas.

16. The method of claim 12 , wherein the pressurized fluid is a liquid.

17. The method of claim 16 , wherein the pressurized fluid is provided by a pressure source, the pressure source having an inlet, a chamber, an outlet, and a mechanically driven piston-like device moveable within the chamber in a first direction to draw the liquid into the chamber through the inlet and moveable in a second direction to urge the liquid out of the chamber through the outlet as the pressurized fluid.

18. A system for making a reduced material container comprising:
a mold configured to accept a preform at a first end thereof, the mold having an open state and a closed state, the closed state forming a cavity defining an internal surface, the internal surface having a second end located remotely from the first end, where a first length is defined by a distance between the first end and the second end;
a holder configured to hold the preform adjacent to an open end of the preform and contact at least a portion of a finish of the preform, wherein the holder is an integral portion of the mold;
a blow nozzle configured to receive a pressurized fluid and dispense the pressurized fluid to the preform; and
a stretch rod configured to mechanically stretch the preform to a second length, the second length being greater than the first length;
wherein the stretch rod is operable to stretch the preform to the second length when the mold is in the open state to form a stretched preform, the stretch rod being further operable to be withdrawn from the stretched preform, the mold operable to move from the open state to the closed state to truncate a portion of the stretched preform at the second end to form a truncated preform, the blow nozzle operable to transfer the pressurized fluid into the truncated preform to urge the truncated preform to expand toward the internal surface of the mold cavity to thereby form the reduced material container.

Assignees

• Discma Ag

Inventors

• Sieradzki Richard
• Janes Corey
• Lee Darrel
• Blystone Mark

Classifications

• B29C49/62

  Venting means · CPC title

• B29C49/12 Primary

  Stretching rods · CPC title

• B29C49/46 Primary

  characterised by using particular environment or blow fluids other than air · CPC title

• B29C49/06

  Injection blow-moulding · CPC title

• B29C49/1212

  the stretching rod comprising at least one opening on the surface, e.g. through which compressed air is blown into the preform to expand the same · CPC title