Device and method for treating hollow bodies

Patent metadata

Field	Value
Publication number	US-12226946-B2
Application number	US-202017779554-A
Country	US
Kind code	B2
Filing date	Nov 27, 2020
Priority date	Nov 29, 2019
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

A device for treating hollow bodies, comprising at least a nozzle and a circuit for setting a pressurized airflow in circulation, having a valve and a first pressure sensor measuring a first pressure; a control distributor of said valve; a line connecting said distributor to said valve; a control unit with a time measurement component; wherein said device comprises a second pressure sensor situated along said line, measuring a second pressure, and wherein said control unit comprises means that are able to determine a differential between the measurement of the first pressure and the measurement of the second pressure as a function of time. The invention also relates to a corresponding treatment method.

First claim

The invention claimed is:

1. A device for treating hollowing bodies, comprising:
a nozzle that opens into a hollow body placed inside a receptacle;
at least one circuit and means for setting at least one pressurized airflow in circulation in at least one direction within said circuit;

said at least one circuit comprising:
at least one valve connected upstream to said nozzle and/or to said receptacle;
at least one first pressure sensor in the region of said nozzle or in the region of said receptacle, measuring a first pressure;

said treatment device also comprising:
at least one control distributor for said at least one valve;
a line connecting said distributor to said corresponding valve;
at least one control unit controlling at least one of the different abovementioned components, said control unit comprising at least one time measurement component;

wherein said device comprises:
at least one second pressure sensor situated along said line, measuring a second pressure inside said line; and

wherein said control unit comprises
means that are able to determine at least one differential between the measurement of the first pressure and the measurement of the second pressure as a function of time.

2. The treatment device as claimed in claim 1 , wherein said at least one second pressure sensor is a sensor for detecting the presence of a pressure in said line.

3. The treatment device as claimed in claim 1 , wherein said at least one second pressure sensor is a sensor for measuring the value of a pressure in said line.

4. The treatment device as claimed in claim 1 , wherein said control unit comprises means that are able to compare said differential as a function of the time that has passed between a first time at which the first pressure is measured and a second time at which the second pressure is measured.

5. The treatment device as claimed in claim 1 , further comprising a mold for blow-molding said hollow body, which is in the form of a preform.

6. The treatment device as claimed in claim 1 , further comprising a cavity for receiving said hollow body, which is in the form of a container.

7. A method for treating hollow bodies, comprising:
introducing a hollow body into a receptacle closed by a nozzle;
setting a pressurized airflow into circulation toward the inside of said nozzle and/or of said receptacle by actuation of at least one valve, which is connected upstream to said nozzle or to said receptacle;
controlling the actuation of said at least one valve by an associated distributor, which is connected to said valve by a line;
measuring a first pressure in the region of said nozzle;

wherein
a second pressure is measured inside said line;
a differential between the measurement of the second pressure and the measurement of the first pressure is calculated;
depending on the differential, a response time of said distributor and a response time of said valve are determined.

8. The treatment method as claimed in claim 7 , wherein the second pressure is measured by detecting the presence of a pressure inside said line.

9. The treatment method as claimed in claim 7 , wherein the second pressure is measured by measuring the value of said second pressure.

10. The treatment method as claimed in claim 7 , wherein, if one of the response times is exceeded, an exceedance notification is output.

11. The treatment method as claimed in claim 10 , wherein
the exceedances of one of the response times are successively recorded;
a notification of the exceedances counted above a maximum threshold is output.

12. The treatment method as claimed in claim 7 , which consists in a method for shaping a container by blow-molding from a blank placed in a mold.

13. The treatment method as claimed in claim 7 , which consists in a method for depositing a barrier-effect layer inside a container placed in a cavity.

14. The treatment device as claimed in claim 2 , wherein said at least one second pressure sensor is a sensor for measuring the value of a pressure in said line.

15. The treatment device as claimed in claim 2 , wherein said control unit comprises means that are able to compare said differential as a function of the time that has passed between a first time at which the first pressure is measured and a second time at which the second pressure is measured.

16. The treatment device as claimed in claim 2 , further comprising a mold for blow-molding said hollow body, which is in the form of a preform.

17. The treatment device as claimed in claim 2 , further comprising a cavity for receiving said hollow body, which is in the form of a container.

18. The treatment method as claimed in claim 8 , wherein the second pressure is measured by measuring the value of said second pressure.

19. The treatment method as claimed in claim 8 , wherein, if one of the response times is exceeded, an exceedance notification is output.

20. The treatment method as claimed in claim 8 , which consists in a method for shaping a container by blow-molding from a blank placed in a mold.

Assignees

• Sidel Participations

Inventors

• Pasquier Hervé
• Delaunay Arnaud

Classifications

• B29C49/16

  using pressure difference {for pre-stretching}, e.g. pre-blowing · CPC title

• B29C49/12

  Stretching rods · CPC title

• B29L2031/7158

  Bottles · CPC title

• B29K2067/003

  PET, i.e. poylethylene terephthalate · CPC title

• B29C49/28

  Blow-moulding apparatus · CPC title