KR102239888B1 - The metal gasket and manufacturing method having anti-corrosion layer - Google Patents

Abstract

The present invention relates to a metal gasket capable of embodying an anticorrosion effect at the same time by forming an anticorrosion layer on the surface of a body with improved airtightness due to the formation in a laminated structure. More specifically, the metal gasket, which keeps an internal combustion engine in which gas or fluids flow airtight, includes: a metal body comprising two sub bodies which can be separated from or combined with each other, while having its surface coated with an anticorrosion agent; and an airtight body provided between the bodies, while formed of an elastic material maintaining airtightness to prevent the departure of the gas or fluids flowing in the internal combustion engine, wherein the anticorrosion agent is made of a mixture made by mixing poly (ethylene oxide)-polystyrene (PEO-b-PS) with an aqueous solution of oil from one selected from among dimethyl silicon and methylphenyl silicon, and the aqueous solution of the oil is obtained by mixing an insoluble surfactant with the oil, while forming emulsion in the mixture.

Description

The metal gasket and manufacturing method having anti-corrosion layer}

The present invention relates to a metal gasket that is formed of a laminated structure to form an anti-corrosion layer on the surface of a body with improved airtightness, thereby implementing an anti-corrosion effect together.

In general, a gasket is sandwiched between parts where fluids and gases flow in and out of engines (internal combustion engines) and oil/pneumatic devices, or between the contact surfaces or the parts to keep airtightness between them to prevent leakage. .

Looking at one of these gaskets, which is applied to an internal combustion engine belonging to the engine part of a vehicle for combustion, in particular, in the engine of a vehicle, a sealing means is installed between the bonding surface between the cylinder block and the cylinder head, and between the contact surface between the cylinder head and the cylinder head cover. It plays the function of (seal) and prevents leakage of high-pressure combustion gas in the combustion chamber. The interior of the combustion chamber is placed in a mechanical environment where the pressure inside the cylinder continuously changes during a four-stroke cycle consisting of compression, expansion, explosion, and exhaust.

In particular, since the vibration or internal gas pressure during explosion is high enough to exceed the tightening force of the bolt coupling that connects the cylinder head and the cylinder block, the force to push the cylinder head upward (lift-up force: hereinafter referred to as'lift force') ) Is generated, and a fine gap exists between the gasket and the cylinder head or the cylinder block.

For example, in a compression ignition engine, when the cylinder head is subjected to a lift force, it bounces about 10㎛ (0.01mm) ~ 15㎛ (0.015mm) from the top of the cylinder block, so there is a fluid gap between the cylinder head and the cylinder block. Will be made.

At this time, since the internal gas pressure is approximately 200 times the atmospheric pressure, the internal gas is counted out through the gap, which adversely affects the combustion efficiency of the internal combustion engine, and severely causes corrosion of the internal combustion engine. Is derived.

Since these fine gaps change fluidly according to the change of load inside the cylinder during the course of the cycle, a laminated gasket with elasticity and durability is required in order to maintain satisfactory sealing in the internal combustion engine and suppress the generation of fine gaps that occur during explosion. Do.

Domestic Registration Office No. 20-0221092 (Announcement date: 2001.16.) Domestic registration patent No. 10-0827685 (announcement date: 2008.05.07.) Journal of Colloid and Interface Science 351 (2010) 102/107, 2010

In order to solve the above-described conventional problems, the present invention is to provide a gasket that can improve durability such as corrosion prevention of the corresponding internal combustion engine by sealing so as to suppress the generation of fine gaps that may occur during operation of the internal combustion engine. There is a purpose.

In order to solve the above-described technical problem, the metal gasket having a corrosion protection layer according to the present invention is a metal gasket that maintains airtightness of an internal combustion engine through which a fluid or gas flows, wherein the metal gasket is made of two powders that can be separated and coupled to each other. An airtight body formed of an elastic material that is provided between the body of a metal material coated with a corrosion inhibitor on its surface and the body, but maintains airtightness so as to prevent the separation of fluid or gas passing through the internal combustion engine, the As the corrosion inhibitor, mix an insoluble surfactant in any one oil selected from dimethyl silicone or methylphenyl silicone, but form an emulsion in the mixture to obtain an aqueous solution of the oil, and then add PEO-b-PS (poly(ethylene oxide)) to the aqueous solution. )-polystyrene).

In addition, the body is preferably applied to form a corrosion protection layer on the body surface by immersion in the corrosion protection liquid accommodated in the receptor or by a spray gun that discharges the corrosion protection liquid to scatter at a predetermined discharge pressure.

In addition, the body includes a lower metal body and an upper metal body stacked on the lower metal body, and a seating groove in which the airtight body is inserted and seated is formed on an outer surface of the lower metal body, and the depth of the seating groove is the corrosion protection layer In the coated state, it is preferable that it is molded to have a width smaller than the thickness of the hermetic body and compressed so that the corresponding thickness is variable by the pressure of the upper metal body.

According to the present invention, the airtight body provided between the lower metal body and the upper metal body having a laminated structure with each other differently from the prior art is improved airtightness (sealing) by varying the thickness by pressing The formation of fine gaps may be prevented against vibration or gas pressure generated by this, and a corrosion prevention layer is formed on the surface of the lower metal body and the upper metal body to further maximize the airtightness.

1 shows a metal gasket having a corrosion protection layer according to the present invention.
2 is an exploded perspective view of FIG. 1.
3 is a cross-sectional view taken along AA′ of FIG. 1.
4 is a flowchart of a method for manufacturing a metal gasket having a corrosion protection layer according to the present invention.
5 is a view showing a state of forming a body using the press machine of FIG. 4.
6 is a view showing a state in which a corrosion protection layer is formed on the surface of the molded body of FIG. 4 by immersion.
7 and 8 are views showing a state in which the lower metal body and the upper metal body are formed by cutting using the cutting means of FIG. 4.
9 is a view showing a state in which the airtight body is formed using the lower jig and the upper jig of FIG. 4.

Since the present invention can apply various transformations and have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all conversions, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the present invention, when it is determined that a detailed description of a related known technology may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, a metal gasket having a corrosion protection layer according to the present invention (hereinafter, simply referred to as'metal gasket') will be described in detail with reference to the accompanying drawings. Prior to the description, the lower metal body 110 and the upper metal body 120 constituting the body 100 of the present invention are shown to have the same shape with each other, but this is only one embodiment, depending on the shape of the internal combustion engine. It is also possible to be molded into different shapes.

First, as shown in FIGS. 1 and 2, the metal gasket 1 according to the present invention largely includes a body 100 and an airtight body 200 on which a corrosion protection layer 310 is formed.

In more detail, the body 100 is intended to be coupled to an internal combustion engine (not shown) in which fuel such as an engine of a vehicle is burned and discharges combustion gas through fastening means such as bolts or screws. Configuration.

For example, the body 100 comprises a lower metal body 110 and an upper metal body 120 made of a plate shape of a metal material and having a stacked structure with each other, and the lower metal body 110 and the upper metal body 120 At least one or more first through holes 140 for moving gas or fluid are perforated at positions opposite to each other.

In addition, the body 100 made of two powders (lower metal body and upper metal body) of a stacked structure is inserted through a fastening means other than the first through hole 140 described above, so that the body 100 is securely installed in the internal combustion engine. A plurality of first fastening holes 150 may be further perforated to be able to be formed.

Furthermore, the upper surface of the lower metal body 110 or the lower surface of the upper metal body 120, that is, the upper surface or the lower surface of the airtight body 200 provided between the body 100 made of two powders, and any one of the surface of the constituents that interview each other It is preferable that a seating groove 130 into which the airtight body 200 is inserted and seated is formed so that the airtightness of the gas or fluid moving in the internal combustion engine is made more stable, and the gist of the present invention is to be clearly understood below. For this purpose, the mounting groove 130 is formed on the upper surface of the lower metal body 110 to be described as an example.

At this time, the seating groove 130 formed to have a predetermined depth (D1) on the upper surface of the lower metal body 110 is formed in a shape corresponding to the circumferential surface of the airtight body 200 so that the airtight body 200 is the seating groove In order to be seated in the shape fit within 130, the depth (D1) of the seating groove (130) is formed to be smaller than the thickness (D2) of the airtight body (200), the lower metal body ( 110) Fluid that is compressed so that the thickness (D2) width of the airtight body 200 can be varied due to the pressure of the upper metal body 120 stacked on the upper side and moves through the first and second through holes 140 and 210 B. It is desirable to be able to effectively block the separation of gas from the vibration of the corresponding internal combustion engine (for example, vibration generated when the combustion gas is discharged to the outside of the vehicle).

To this end, the airtight body 200 may be made of an elastic material such as rubber or silicone whose thickness (D2) width can be variable through the pressing of the upper metal body 120, and the first through hole 140 or the first through hole 140 A second through hole 210 or a second fastening hole is formed at a position opposite to the 1 fastening hole 150 to move fluid or gas, as well as the internal combustion engine through fastening of the fastening means in the state inserted into the body 100 It has a structure that can be installed on.

In addition, guide portions 230 are formed on both sides of the airtight body 200 so that when it is seated in the seating groove 130, it is guided so that it can be stably seated in the lower metal body 110 according to its shape.

On the other hand, in the present invention, the lower metal body 110 and the upper metal body 120 are, in particular, each surface so as to prevent the surface from being corroded by the movement of the fluid moving through the first through hole 140. A corrosion protection layer 310 may be applied to the corrosion protection layer 310 by immersion of the body 100 in the corrosion protection liquid 300 accommodated in the receptor 320 or at a predetermined discharge pressure. The corrosion prevention layer 310 having a predetermined thickness may be formed on the surface by a spray gun (not shown) that discharges the prevention liquid 300 so that it can be scattered. (See Fig. 3)

Here, the anti-corrosion solution 300 forming the anti-corrosion layer 310 on the body 100 is dimethyl silicone having oil properties (for example, at least among TSF-400, TSF-405, and TSF-451 currently available on the market) Any one) or methylphenyl silicone (eg, at least any one of TSF-431, TSF-433, TSF-434 currently available on the market) is PEO-b-PS (poly(ethylene oxide)) in the selected silicone oil. An aqueous solution in which polystyrene) is mixed in a predetermined weight part may be used as the corrosion inhibitor 300.

At this time, the weight ratio of the corrosion inhibitor 300 is preferably mixed so that the ratio of PEO-b-PS is 1 to 1.2 parts by weight when the silicone oil is 1 to 1.5 parts by weight.

On the other hand, dimethyl silicone or methylphenyl silicone having oil properties in the present invention is insoluble in the silicone oil to overcome the difficulty of forming an aqueous solution using water as a solvent because it is insoluble in water. After mixing a surfactant (refer to 102/107 description of document No. 351 of Colloid and Interface Science in 2010), it forms an O/W emulsion, so that the formation of an aqueous solution of silicone oil can be satisfied, and a corrosion inhibitor The application of 300 was made possible.

Furthermore, the anticorrosion liquid 300 in the present invention is 100 weight of a coating agent made of methylpyrrolidone or methyl isobutyl ketone so as to further maximize the effect of preventing corrosion as well as improving its application ability when applied with a spray gun. With respect to the part, 15 to 20 parts by weight of the above-described silicone oil may be further mixed so that the ability to apply (coating) the surface of the body 100 may be improved.

Hereinafter, a method for manufacturing a metal gasket having a corrosion protection layer according to the present invention (hereinafter, simply referred to as a'manufacturing method') according to the present invention will be described in detail with reference to the accompanying drawings. Prior to killing, the corrosion inhibitor 300 to be applied to the surface of the body 100 will be described below by way of immersion as an example.

First, as shown in Figure 4, the manufacturing method (2) according to the present invention is largely 1) the step of forming a disk made of a metal material (S100), 2) the precipitation or application of an anti-corrosion solution on the surface of the formed disk. Step (S200), 3) step of drying the original plate on which the anti-corrosion layer is formed (S300), 4) the step of forming the lower metal body and the upper metal body shape by processing the disk (S400) and 5) the airtight body 200 It includes the step of molding (S500).

For example, 1) step (S100) is a step for forming the lower metal body 110 in which the above-described seating groove 130 is formed and the upper metal body 120 superimposed to have a stacked structure on the lower metal body 110 to be.

To this end, the lower metal body 110 and the upper metal body 120 are lifted and lowered from the lower mold 410 and the lower mold 410 by an elevating means 440 such as a cylinder, as shown in FIG. 5. It can be molded into a press machine 400 including an upper mold 420.

Here, the press machine 400 is provided in a plurality of configurations so as to individually mold the lower metal body 110 or the upper metal body 120 to be formed, or an upper mold provided to be interchangeable with the press machine 400 It is preferable to individually mold the lower metal body 110 or the upper metal body 120 by 420 or collectively form the plurality of press machines 400, and the lower metal body 110 is formed. A protrusion 430 is formed to protrude downward on the lower surface of the upper mold 420 to be formed so that the seating groove 130 can be formed by pressing the disk 10 through the protrusion 430.

Next, step 2) (S200) is a step for forming a corrosion protection layer 310 on the surfaces of each of the lower metal body 110 and the upper metal body 120 formed by compression of the press machine 400. .

To this end, as shown in Fig. 6, the lower metal body 110 and the upper metal body 120 are mixed with an insoluble surfactant in any one oil selected from the above-described dimethyl silicone or methylphenyl silicone, but an emulsion is added to the mixture. After forming and obtaining an aqueous solution of the oil, the anti-friction liquid 300 made of a mixture of PEO-b-PS (poly(ethylene oxide)-polystyrene) in the aqueous solution is accommodated in the container 320 The corrosion prevention layer 310 can be formed by immersing the lower metal body 110 and the upper metal body 120 in the.

At this time, a plurality of the lower metal body 110 and the upper metal body 120 immersed in the corrosion protection liquid 300 are accommodated through a tray (not shown) in which a storage space is formed to be immersed in the corrosion protection liquid 300. After being inserted into the receptor 320 so that it is desirable to be able to be pulled out integrally.

After the lower metal body 110 and the upper metal body 120 are immersed in the corrosion-resistant liquid 300, the lower metal body 110 and the upper metal body are dried for a certain time at room temperature in step 3) (S300). (120) A cured anti-corrosion layer 310 having a predetermined thickness can be formed on the surface.

On the other hand, steps 2) (S200) and 3) (S300) described above are sequentially repeated as necessary to vary the thickness of the corrosion protection layer 310, and the lower metal body 110 and the upper metal body ( 120) It is preferable that the lower metal body 110 and the upper metal body 120 are dried while rotating at a constant speed during the drying process so that the thickness of the corrosion prevention layer 310 to be formed on the surface is constant.

Next, step 4) (S400) is a step for cutting the lower metal body 110 and the upper metal body 120 on which the corrosion protection layer 310 is formed to form a shape to be mounted on the internal combustion engine.

To this end, as shown in Figs. 7 and 8, the cutting means 600 such as a laser is a virtual body having a shape of the lower metal body 110 or the upper metal body 120 through a control signal from a control unit (not shown). The disk 10 is cut while moving along the line L of the lower metal body 110 or the upper metal body 120 so that the final shape of the lower metal body 110 or the upper metal body 120 can be formed.

Finally, in step 5) (S500), the airtight body 200 is inserted and seated in a shape-matched manner in the seating groove 130 formed in the lower metal body 110 described above, but sealing the fluid or gas passing through the internal combustion engine. It is a step for molding, and the airtight body 200 is formed through a molding plate 500 including a lower jig 510 and an upper jig 520, but the airtight body 200 is separable from each other.

To this end, as shown in FIG. 9, an intaglio portion 540 having the same shape as the shape of the hermetic body 200 to be formed is formed on the upper surface of the lower jig 510, and the intaglio portion 540 is The lower jig 510 has a structure capable of receiving and molding raw materials through a moving path 530 provided inside the lower jig 510.

At this time, the raw material refers to a raw material made of a liquid having elastic properties such as rubber or silicone, but when the raw material is supplied to the intaglio portion 540 of the lower jig 510 through a pump, the upper jig 520 is (510) It is preferable that the intaglio portion 540 is supplied in an airtight state by interviewing the upper surface so that the airtight body 200 is formed.

In addition, the thickness (D2) of the airtight body 200 is formed larger than the depth (D1) of the above-described mounting groove 130 so that the airtightness of the internal combustion engine can be easily made by compression of the airtight body 200. do.

As described above, in the metal gasket 1 according to the present invention, the airtight body 200 provided between the lower metal body 110 and the upper metal body 120 having a stacked structure with each other differently from the prior art As a result, the airtightness (sealing) is improved through the variation of the thickness, so that the formation of fine gaps against vibration or gas pressure generated by the operation of the internal combustion engine can be blocked, and the lower metal body 110 and the upper metal body (120) It has an effect of forming a corrosion protection layer 310 on the surface so that the airtightness can be further maximized.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

1: Metal gasket having an anti-corrosion layer according to the present invention
100: body
110: lower metal body 120: upper metal body
130: seating groove 140: first through hole
150: 1st fastening work
200: hermetic body
210: second through hole 230: guide portion
300: corrosion inhibitor
310: corrosion protection layer 320: receptor
400: press machine
500: forming plate
600: cutting means

Claims (4)

In the metal gasket for maintaining airtightness of an internal combustion engine in which fluid or gas flows,
The metal gasket is
A body made of two powders capable of being separated and coupled to each other, and a metal body 100 coated with a corrosion inhibitor 300 on the surface thereof; And
An airtight body 200 formed between the body 100 and formed of an elastic material that is provided between the body 100 and maintains airtightness so as to prevent separation of fluid or gas passing through the internal combustion engine.
When the anti-corrosion liquid 300 is 1 to 1.5 parts by weight of a mixture formed by mixing an insoluble surfactant in any one silicone oil selected from dimethyl silicone oil or methylphenyl silicone oil to form an emulsion, PEO-b-PS ( It consists of a mixture of 1 to 1.2 parts by weight of poly(ethylene oxide)-polystyrene),
The anti-corrosion solution 300 is further mixed with a coating agent to increase the corrosion-preventing effect of the body 100, but the coating agent is based on 100 parts by weight of methylpyrrolidone or methyl isobutyl ketone, and 15 to 20 parts by weight of silicone oil Metal gasket having a corrosion protection layer, characterized in that mixed.

The method of claim 1,
The body 100 is
A corrosion protection layer 310 is formed on the surface of the body 100 by a spray gun that is immersed in the corrosion protection liquid 300 accommodated in the receptor 320 or discharges the corrosion protection liquid 300 to be scattered at a predetermined discharge pressure. Metal gasket having an anti-corrosion layer, characterized in that applied so as to be formed.
The method of claim 2,
The body 100 includes a lower metal body 110 and an upper metal body 120 stacked on the lower metal body 110,
On the outer surface of the lower metal body 110
A seating groove 130 into which the airtight body 200 is inserted and seated is formed, and the depth (D1) of the seating groove 130 is the thickness of the airtight body 200 in a state in which the corrosion protection layer 310 is applied ( A metal gasket having a corrosion protection layer, characterized in that it is molded to have a width smaller than that of D2) and compressed so that the corresponding thickness (D2) is variable by the pressure of the upper metal body (120).
1) forming a disc 10 made of a metal material;
2) Precipitating or applying an anti-corrosion solution (300) on the molded surface of the original plate (10);
3) drying the original plate 10 on which the anti-corrosion layer 310 is formed;
4) processing the disk 10 to form a lower metal body 110 and an upper metal body 120; And
5) forming the hermetic body 200; including,
Step 2) and step 3) are sequentially repeated,
When the anti-corrosion liquid 300 is 1 to 1.5 parts by weight of a mixture formed by mixing an insoluble surfactant in any one silicone oil selected from dimethyl silicone oil or methylphenyl silicone oil to form an emulsion, PEO-b-PS ( It consists of a mixture of 1 to 1.2 parts by weight of poly(ethylene oxide)-polystyrene),
The anti-corrosion solution 300 is further mixed with a coating agent to increase the anti-corrosion effect of the body 100, but the coating agent is mixed with 15 to 20 parts by weight of silicone oil based on 100 parts by weight of methylpyrrolidone or methyl isobutyl ketone. And the lower metal body 110 and the upper metal body 120 are immersed in the corrosion protection liquid 300 accommodated in the receptor 320 or the corrosion protection liquid 300 is discharged at a predetermined discharge pressure. A method for manufacturing a metal gasket having a corrosion protection layer, characterized in that it is applied by a spray gun discharged to the surface so that the corrosion protection layer 310 can be formed on each surface.

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