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Layered metallic gasket

A technology of gaskets and metal sheets, applied in the direction of engine seals, valve devices, adhesives, etc., can solve problems such as reduction of locking torque

Active Publication Date: 2013-03-27
SEVAL SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of these will result in a reduction in locking torque

Method used

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  • Layered metallic gasket
  • Layered metallic gasket
  • Layered metallic gasket

Examples

Experimental program
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Embodiment Construction

[0012] A preferred embodiment of the lid gasket 1 is in figure 1 shown in . The gasket comprises a plurality of sheets, or crown-shaped discs, stacked one on top of the other with alternating metal 2 and non-metal 3 . The metallic sheet 2 consists of steel, preferably stainless steel, while the non-metallic sheet 3 consists of graphite or PTFE. According to a preferred embodiment, the graphite is a high-density type of graphite, the density of which is in particular greater than 1.5 g / cm 3 . The higher density results in lower porosity of the graphite, which prevents internal leakage and therefore improves the sealing ability of the lid gasket. The sheets are held together by disposing an adhesive between each pair of consecutive sheets, wherein the adhesive is applied in the form of a spray. The sprayed adhesive consisted of a dispersion of natural adhesives and resins in: naphtha (<50%), cyclohexane (<25%), liquefied propane gas (25%), isobutane ( <25%) and acetone (<10...

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PUM

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Abstract

Head gasket (1) comprising a plurality of blades, or rather of circular crown shaped discs that are laid on top of one another according to an alternation of metal (2)—non metal (3), said blades kept together by arranging an adhesive between each pair of consecutive blades, characterised in that the adhesive is applied in spray form.

Description

technical field [0001] The present invention relates to an innovative metal head gasket with high sealing performance and the ability to maintain locking torque at high temperatures. The invention also relates to related manufacturing methods. Background technique [0002] A variety of metal lid gaskets are known in the prior art. These gaskets are elements adapted to ensure a tight seal against fluids, which may be liquids or gases, and these gaskets have a variety of uses in mechanical components, such as valves, mechanical elements, internal combustion engines and the like. The gasket consists of a stack of a plurality of alternating metallic and non-metallic layers with an adhesive layer disposed therebetween. For example, Japanese patent JP6081956 discloses a gasket for a motor vehicle engine head gasket consisting of a metal layer coated with a chrome-based layer on which is coated a layer of rubber adhesive. The adhesive is protected by a further layer of heat-resi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/12F16K1/226
CPCF16J15/125F16J15/122Y10T156/1074
Inventor A·费纳罗利
Owner SEVAL SRL