Method for supplying inert gas into poppet valve intermediate and apparatus for supplying inert gas into poppet valve intermediate

Patent metadata

Field	Value
Publication number	US-9840948-B2
Application number	US-201515504845-A
Country	US
Kind code	B2
Filing date	Oct 28, 2015
Priority date	Oct 28, 2015
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A method and an apparatus for supplying inert gas into a poppet valve intermediate are provided that are capable of properly filling the inert gas without waste into the poppet valve intermediate of any size. After a negative pressure is achieved by suction in an internal space (Win) of a poppet valve intermediate (W) as compared to an ambient pressure (Pa) of the poppet valve intermediate (W), the inert gas is supplied into the internal space (Win) until a pressure (F) of the internal space (Win) reaches the ambient pressure (Ps) of the poppet valve intermediate (W).

First claim

The invention claimed is:

1. A method for supplying inert gas into a poppet valve intermediate with a supply/discharge adjuster, the poppet valve intermediate having an internal space with an opening on one axial end side, and being arranged with the opening on one axial end side facing upward, the supply/discharge adjuster supplying inert gas to the opening on one axial end side of the poppet valve intermediate before a cooling medium metal is supplied into the internal space of the poppet valve intermediate, comprising the steps of:
closing the opening on the one axial end side of the poppet valve intermediate with the supply/discharge adjuster,
achieving a negative pressure by negative-pressure suction in the internal space of the poppet valve intermediate as compared to an ambient pressure of the poppet valve intermediate, and
supplying the inert gas from the supply/discharge adjuster to the internal space until a pressure of the internal space reaches the ambient pressure of the poppet valve intermediate.

2. The method for supplying inert gas into a poppet valve intermediate according to claim 1 , wherein
the supply/discharge adjuster is capable of switching adjustment between a negative-pressure suction and a supply of inert gas, and wherein
the supply/discharge adjuster is brought into contact with an opening circumferential edge portion on the one axial end side of the poppet valve intermediate to close the opening on one axial end side of the poppet valve intermediate,
the negative-pressure suction is then performed through adjustment of the supply/discharge adjuster to make the pressure inside the internal space of the poppet valve intermediate lower than the ambient pressure of the poppet valve intermediate, and wherein
the inert gas is then supplied through the switching adjustment of the supply/discharge adjuster into the internal space of the poppet valve intermediate until the inside of the internal space reaches the ambient pressure of the poppet valve intermediate.

3. The method for supplying inert gas into a poppet valve intermediate according to claim 2 , wherein
the supply/discharge adjuster is also used as a conveying tool to convey the supply/discharge adjuster to a supply station of the cooling medium metal constituting the next process while the poppet valve intermediate is sucked to the supply/discharge adjuster based on the negative-pressure suction, and wherein
after the supply/discharge adjuster is conveyed to the cooling medium metal supply station, the switching adjustment of the supply/discharge adjuster is performed to supply the inert gas into the internal space of the poppet valve intermediate.

4. The method for supplying inert gas into a poppet valve intermediate according to claim 3 , wherein
the poppet valve intermediate is prepared that has an opening on one axial end side thereof opened in a leading end surface of a diameter expansion part of the poppet valve intermediate, and wherein
when the poppet valve intermediate is sucked to the supply/discharge adjuster based on the negative-pressure suction, the leading end surface of the diameter expansion part of the poppet valve intermediate is sucked to the supply/discharge adjuster.

5. The method for supplying inert gas into a poppet valve intermediate according to claim 2 , wherein
both operations of the negative-pressure suction and the supply of the inert gas to the inside of the internal space of the poppet valve intermediate are performed at the same working position, and wherein
after completion of both of the operations, the poppet valve intermediate is conveyed to a supply station of the cooling medium metal constituting the next process.

6. The method for supplying inert gas into a poppet valve intermediate according to claim 2 , wherein
the supply/discharge adjuster is used that includes a supply/discharge passage for selectively performing the negative-pressure suction and the supply of the inert gas, wherein the supply/discharge passage has an opening opened to the outside, and wherein
when the supply/discharge adjuster comes into contact with the opening circumferential edge portion on one axial end side of the poppet valve intermediate, the opening of the supply/discharge passage faces the opening on one axial end side of the poppet valve intermediate.

7. The method for supplying inert gas into a poppet valve intermediate according to claim 2 , wherein
the negative-pressure suction and the supply of the inert gas are repeated multiple times.

8. The method for supplying inert gas into a poppet valve intermediate according to claim 1 , wherein
nitrogen or argon is used as the inert gas.

9. The method for supplying inert gas into a poppet valve intermediate according to claim 8 , wherein
at least an ambient atmosphere of the poppet valve intermediate is an inert gas atmosphere.

10. The method for supplying inert gas into a poppet valve intermediate according to claim 1 , wherein
the ambient pressure of the poppet valve intermediate is the same pressure as the atmospheric pressure.

11. An apparatus for supplying inert gas into a poppet valve intermediate in which an object to be supplied with inert gas is a poppet valve intermediate having an internal space with an opening on one axial end side, the apparatus having a support supporting the poppet valve intermediate with the opening on one axial end side facing upward, the inert gas being supplied from the opening on one axial end side of the poppet valve intermediate into the internal space of the poppet valve intermediate while the poppet valve intermediate is supported by the support, the apparatus comprising:
a supply/discharge adjuster arranged to be capable of coming into contact with and separating from an opening circumferential edge portion on one axial end side of the poppet valve intermediate, the supply/discharge adjuster closing the opening on one axial end side when coming into contact with the opening circumferential edge portion on one axial end side of the poppet valve intermediate, wherein
the supply/discharge adjuster is set to have achievable switching forms including a negative-pressure suction form and an inert gas supply form, wherein in the negative-pressure suction form, when the supply/discharge adjuster is located on the opening circumferential edge portion on one axial end side of the poppet valve intermediate, negative-pressure suction is performed in the internal space of the poppet valve intermediate until reaching a setting pressure lower than an ambient pressure of the poppet valve intermediate, and wherein in the inert gas supply form, when the pressure inside the internal space of the poppet valve intermediate reaches the setting pressure due to the negative-pressure suction form, the inert gas is supplied into the internal space of the poppet valve intermediate until the pressure inside the internal space reaches the ambient pressure of the poppet valve intermediate.

12. The apparatus for supplying inert gas into a poppet valve intermediate according to claim 11 , wherein the supply/discharge adjuster includes a supply/discharge passage for selectively performing the negative-pressure suction and the supply of the inert gas, and wherein the supply/discharge passage has an opening facing the opening on one axial end side when the supply/discharge adjuster comes into contact with the opening circumferential edge portion on one axial end side of the poppet valve intermediate.

13. The apparatus for supplying inert gas into a poppet valve intermediate according to claim 12 , comprising
a conveying mechanism conveying the supply/discharge adjuster as a conveyin

Assignees

• Nittan Valva

Inventors

• Yokoyama Hisanaga
• Uchida Shigeru

Classifications

• F01L2303/01

  Tools for producing, mounting or adjusting, e.g. some part of the distribution · CPC title

• F01L2820/01

  Absolute values · CPC title

• F01L3/14 Primary

  by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve · CPC title

• B23P15/002

  poppet valves · CPC title

• Y10T29/49307

  Composite or hollow valve stem or head making · CPC title