METHOD FOR MANUFACTURING METALLIC GASKET FOR CYLINDER HEAD, AND METALLIC GASKET FOR CYLINDER HEAD

Title:

METHOD FOR MANUFACTURING METALLIC GASKET FOR CYLINDER HEAD, AND METALLIC GASKET FOR CYLINDER HEAD

Document Type and Number:

WIPO Patent Application WO/2011/102148

Kind Code:

A1

Abstract:

A metallic gasket for a cylinder head, wherein a base plate and a height difference adjusting plate are engaged with each other with an increased engaging force. A method for manufacturing a metallic gasket for a cylinder head is configured in such a manner that prepared holes (3c) are respectively formed in protrusions (3b) of a height difference adjusting plate (3), a die (4) having a pyramidal punch (4a) is inserted into each of the prepared holes (3c) to raise the periphery of the prepared hole (3c) into a tubular shape and at the same time to divide and cut the periphery into multiple sections to thereby form a tubular section (3d) composed of raised protrusions (3d1), engaging holes (2h) are formed in a base plate (2) at positions corresponding to the tubular sections (3d) of the height difference adjusting plate (3), the tubular sections (3d) of the height difference adjusting plate (3) are caused to penetrate through the engaging holes (2h) of the base plate (2), and then the raised protrusions (3d1) of the tubular sections (3d) are folded outward and crushed to engage the protrusions (3b) with the base plate (2).

Inventors:

MATSUSHITA YOSHITAKA (JP)
TAKAHASHI YUJI (JP)
ARAKAWA YOSHIMI (JP)

Application Number:

PCT/JP2011/000962

Publication Date:

August 25, 2011

Filing Date:

February 21, 2011

Export Citation:

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Assignee:

NIPPON LEAKLESS IND CO LTD (JP)
MATSUSHITA YOSHITAKA (JP)
TAKAHASHI YUJI (JP)
ARAKAWA YOSHIMI (JP)

International Classes:

F02F11/00; B21D39/00; B21D53/84; F16J15/08

Foreign References:

JPH0842696A	1996-02-16
JP2007064449A	2007-03-15
JP2010203379A	2010-09-16
JP2002286141A	2002-10-03
JPH10281289A	1998-10-23

Other References: