Gas suction device of casting mold

Patent metadata

Field	Value
Publication number	US-11511335-B2
Application number	US-202217681950-A
Country	US
Kind code	B2
Filing date	Feb 28, 2022
Priority date	Mar 30, 2021
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A gas suction device of a casting mold includes an overflow portion, a suction path, and a shut-off valve. The shut-off valve includes a housing section for housing a valve element. An upstream-side housing portion of the housing section has an arc-shaped outer peripheral edge. The overflow portion includes an introduction path which is continuous with the upstream-side housing portion and guides gas to the upstream-side housing portion. At a predetermined location on the outer peripheral edge, the introduction path is connected to the upstream-side housing portion along the tangential direction of the outer peripheral edge.

First claim

What is claimed is:

1. A gas suction device of a casting mold, comprising:
an overflow portion connected to a cavity portion of the casting mold and formed along a predetermined surface;
a suction path configured to suck gas in the cavity portion via the overflow portion; and
a shut-off valve connected between the overflow portion and the suction path and configured to allow the suction path to be blocked, wherein
the shut-off valve includes a valve element and a housing section configured to house the valve element,
the housing section includes a valve seat portion, an upstream-side housing portion located on an upstream side of the valve seat portion, and a downstream-side housing portion located on a downstream side of the valve seat portion,
the valve element includes an abutment portion configured to abut against the valve seat portion to block the suction path, an upstream-side valve portion located on an upstream side of the abutment portion, and a downstream-side valve portion located on a downstream side of the abutment portion,
the predetermined surface includes an angle reference surface between the overflow portion and a position where an axis of the valve element intersects the predetermined surface,
an angle formed by an axis of the downstream-side housing portion and the angle reference surface is an obtuse angle,
the upstream-side housing portion includes an outer peripheral edge having an arc shape on the predetermined surface,
the overflow portion includes an introduction path continuous with the upstream-side housing portion and configured to guide the gas to the upstream-side housing portion, and
at a predetermined location on the outer peripheral edge, the introduction path is connected to the upstream-side housing portion along a tangential direction of the outer peripheral edge.

2. The gas suction device of the casting mold according to claim 1 , wherein
a width of the introduction path is smaller than a diameter of the outer peripheral edge, and
the introduction path is connected to the outer peripheral edge in a manner that a central axis of the introduction path is shifted from a center of the outer peripheral edge.

3. The gas suction device of the casting mold according to claim 1 , wherein
the predetermined surface is along a vertical line, and
a central axis of the introduction path is along the predetermined surface and forms a predetermined angle with respect to the vertical line.

4. The gas suction device of the casting mold according to claim 1 , wherein
the introduction path includes a bottom surface having a planar shape and extending along a central axis of the introduction path, and
a width of the bottom surface becomes smaller toward the predetermined location.

5. The gas suction device of the casting mold according to claim 1 , wherein
at least when the shut-off valve is in an open state, a cross-sectional area of a gap between the downstream-side housing portion and the downstream-side valve portion on a plane perpendicular to the axis of the downstream-side housing portion increases from the abutment portion toward the downstream side within a certain distance from the abutment portion.

6. The gas suction device of the casting mold according to claim 5 , wherein
the downstream-side valve portion has a truncated cone shape whose diameter decreases from the abutment portion toward the downstream side.

7. The gas suction device of the casting mold according to claim 1 , wherein
the gas flowing from the introduction path into the downstream-side housing portion forms a swirling flow that swirls along the outer peripheral edge, and
the downstream-side valve portion includes a rib extending so as to follow a swirling direction of the swirling flow.

Assignees

• Honda Motor Co Ltd

Inventors

• Ariyama Yuki
• Yamada Masahiro
• Kimura Satoru
• Yuki Kenji

Classifications

• F16K51/00

  Other details not peculiar to particular types of valves or cut-off apparatus · CPC title

• F16K1/36

  Valve members (for double-seat valves F16K1/44 {; for butterfly valves F16K1/222, F16K1/223}) · CPC title

• F16K1/32 Primary

  Details (details of more general applicability F16K25/00 - F16K51/00) · CPC title

• B22D17/2007

  Methods or apparatus for cleaning or lubricating moulds · CPC title

• B01D35/04

  Plug, tap, or cock filters {filtering elements mounted in or on a faucet} · CPC title