KR101933507B1 - Engine cover and fabrication method of the same - Google Patents

Abstract

An engine cover comprises: a lower plate; a sound absorption material provided on the lower plate; and an upper plate provided on the sound absorption material to be coupled to the lower plate. Each of the lower plate and the upper plate includes felt. The felt has polyethylene terephthalate (PET).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an engine cover,

The present invention relates to an engine cover and a method of manufacturing the same, and more particularly, to an engine cover capable of simultaneously achieving weight reduction and absorbability improvement and a method of manufacturing the same.

The vehicle is operated using the engine as a power source. The engine is included in the engine room. The engine has a cylinder block having a plurality of bores formed therein, a piston reciprocatingly inserted into each bore of the cylinder block, a piston coupled to the cylinder block, A cylinder head forming a plurality of combustion chambers corresponding to the bores, and a crank case coupled to a lower portion of the cylinder block and connected to the piston, the crank shaft being rotated by the reciprocation of the piston.

The cylinder head is provided with an intake and exhaust port communicating each combustion chamber with an external intake and exhaust device. An intake and exhaust valve for opening and closing the intake and exhaust port is provided. A cooling passage and an oil passage communicating with each other are formed in the cylinder block and the cylinder head, In the case of an engine, a plurality of ignition plugs are also installed.

The cylinder head has a complicated external appearance due to the internal components, and the various components installed thereon are exposed to the outside to complicate the shape of the engine room.

Therefore, the engine cover is mounted on the upper portion of the cylinder head cover for the purpose of simplifying the shape of the engine room and making the appearance look good. The engine cover protects the engine room, but also blocks humming noise from the engine room.

Korean Registration No. 10-1055100

SUMMARY OF THE INVENTION An object of the present invention is to provide an engine cover capable of simultaneously achieving light weight and improved absorptiveness.

An object of the present invention is to provide a method of manufacturing an engine cover capable of providing an engine cover capable of simultaneously achieving light weight and improved absorptiveness.

An engine cover according to an embodiment of the present invention includes a lower plate, a sound absorbing material provided on the lower plate, and an upper plate provided on the sound absorbing material and fastened to the lower plate. Each of the lower plate and the upper plate includes a nonwoven fabric. The nonwoven fabric includes polyethylene terephthalate (PET).

The lower plate may include a lower groove, the upper plate may include an upper groove, and the sound absorbing material may be located in a space defined by the lower groove and the upper groove.

The top plate includes a top plate body on which the top groove is disposed, and a skin layer provided on the top plate body.

The skin layer includes PET.

The skin weight of the skin layer may be 200 to 400 g / m ² .

The weight of the raw fabric of the nonwoven fabric included in the upper plate may be 1400 to 2000 g / m ² .

Wherein the PET comprises 40 to 50 wt% of low melting point polyethylene terephthalate fibers, 10 to 40 wt% of regular polyethylene terephthalate fibers, and 10 to 40 wt% of flame retardant polyethylene terephthalate fibers, based on the total weight of the PET, May include.

The low melting point polyethylene terephthalate fiber may have a melting point of 160 to 200 캜.

The sound absorbing material may include polypropylene.

The weight of the sound absorbing material may be 180 to 330 g / m ² .

The lower plate may include a lower plate body portion in which the lower groove is disposed, a fastening portion projecting downward from the lower plate body portion to be engaged with the engine, and a reinforcing portion surrounding at least a part of the fastening portion.

The lower groove may be provided with a through hole passing through the lower plate body.

The lower plate body, the fastening portion, and the reinforcing portion may be integral.

The weight of the fabric of the nonwoven fabric included in the lower plate may be 1000 to 1500 g / m ² .

When viewed from above, a part of the upper plate may cover the entire lower plate.

A method of manufacturing an engine cover according to an embodiment of the present invention includes the steps of: thermally pressing a nonwoven fabric to manufacture a lower plate; thermally compressing the nonwoven fabric to manufacture an upper plate; and providing a sound absorbing material between the lower plate and the upper plate . Each of the steps of manufacturing the lower plate and the step of fabricating the upper plate may include the steps of preparing a fiber including polyethylene terephthalate (PET), producing a web with the fiber, Thereby producing a nonwoven fabric.

Providing the lower plate and the upper plate with heat, and thermally welding them to each other.

At least one of the steps of producing the lower plate and the step of producing the upper plate performs the step of preheating the nonwoven fabric at 180 to 240 DEG C for 70 to 110 seconds.

Each of the steps of producing the lower plate and the step of producing the upper plate may be performed by thermocompression at 70 to 120 kgf / cm < 2 > for 70 to 90 seconds.

Wherein the lower plate includes a lower plate body portion in which a lower groove is disposed and a fastening portion protruding downward from the lower plate body portion to be fastened to the engine, wherein the step of fabricating the lower plate includes pressing the nonwoven fabric onto a metal mold, And may be thermocompression-bonded in the form of the lower plate integrally formed with the lower plate body and the fastening portion.

According to the engine cover according to the embodiment of the present invention, it is possible to realize both weight reduction and absorbability improvement at the same time.

According to the method for manufacturing an engine cover according to an embodiment of the present invention, it is possible to provide a method of manufacturing an engine cover that can realize light weight and improved absorptiveness at the same time.

1 is a schematic perspective view of an engine cover according to an embodiment of the present invention.
2 is a cross-sectional view corresponding to AA in Fig.
3 is a schematic exploded perspective view of an engine cover according to an embodiment of the present invention
4 is a schematic perspective view of a top plate included in an engine cover according to an embodiment of the present invention.
5A is a perspective view of a lower plate included in an engine cover according to an embodiment of the present invention when viewed from above.
5B is a perspective view of the lower plate included in the engine cover according to the embodiment of the present invention when viewed from below.
6 is a flowchart schematically showing a method of manufacturing an engine cover according to an embodiment of the present invention.
7 is a flowchart schematically showing a step of producing a nonwoven fabric included in each of the steps of providing the upper plate and providing the lower plate.
8 is a photograph of a fastening member attached to an engine cover manufactured by a conventional method.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are shown enlarged from the actual for the sake of clarity of the present invention. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, where a portion such as a layer, film, region, plate, or the like is referred to as being "on" another portion, this includes not only the case where it is "directly on" another portion, but also the case where there is another portion in between. On the contrary, when a part such as a layer, film, region, plate or the like is referred to as being "under" another part, it includes not only the case where it is "directly underneath" another part but also another part in the middle.

1 is a schematic perspective view of an engine cover according to an embodiment of the present invention. 2 is a cross-sectional view corresponding to A-A in Fig. 3 is a schematic exploded perspective view of an engine cover according to an embodiment of the present invention.

The engine cover 10 according to an embodiment of the present invention can be used in a transportation means. Transportation means means means used for transportation of goods, people, and the like. The means of transport include, for example, land vehicles, maritime vehicles and heavenly vehicles. Terrestrial vehicles may include, for example, automobiles, bicycles, motorcycles, trains, etc., including passenger cars, vans, trucks, trailer trucks, and sports cars. The marine transportation means may include, for example, ships, submarines, and the like. The celestial transportation means may include, for example, small non-shapes such as airplanes, han gliders, hot air balloons, helicopters, drones, and the like.

1 to 3, an engine cover 10 according to an embodiment of the present invention includes a lower plate 100, a sound absorbing material 200, and a top plate 300. The top plate 300 includes a nonwoven fabric. The nonwoven fabric may be at least one of, for example, a needle punching nonwoven fabric, a spunbond nonwoven fabric, and a spunlaced nonwoven fabric. The nonwoven fabric includes polyethylene terephthalate (PET).

The lower plate 100 includes a nonwoven fabric. The nonwoven fabric may be at least one of, for example, a needle punching nonwoven fabric, a spunbond nonwoven fabric, and a spunlaced nonwoven fabric. The nonwoven fabric includes polyethylene terephthalate (PET).

When viewed from above, a part of the upper plate 300 may cover the entire lower plate 100. [ When viewed from above, the area of the top plate 300 may be larger than the area of the bottom plate 100.

The PET contained in each of the upper plate 300 and the lower plate 100 is composed of 40 to 50 wt% of low melting point polyethylene terephthalate fiber, 10 to 40 wt% of regular polyethylene terephthalate fiber, and 10 To 40% by weight of flame retardant polyethylene terephthalate fibers.

The low melting point polyethylene terephthalate fiber has a low melting point and is advantageous for forming a product shape when the upper plate 300 and the lower plate 100 are formed by thermocompression using a metal mold.

The low melting point polyethylene terephthalate fiber may have a melting point of 160 to 200 캜. When the melting point of the low melting point polyethylene terephthalate fiber is less than 160 캜, the durability may be poor. When the melting point is more than 200 캜, molding of the upper and lower plates may be difficult.

The low melting point polyethylene terephthalate fiber is easier to bend than the regular polyethylene terephthalate fiber and can improve the workability of the engine cover. The low melting point polyethylene terephthalate fiber is produced so as to reduce the crystallization force during polymerization and has a low melting point, and can be substituted for the resin adhesion which is harmful to the human body and the environment.

The low melting point polyethylene terephthalate fiber may be contained in an amount of 40 to 50 wt% based on the total weight of the PET. If the low melting point polyethylene terephthalate fiber is less than 40 wt%, the fluidity is increased and the durability of the upper plate and the lower plate may be deteriorated. If the low melting point polyethylene terephthalate fiber is more than 50 wt%, the hardness may increase and molding of the upper plate and the lower plate may be difficult.

The thickness of the low melting point polyethylene terephthalate fiber may be 3 to 6 denier. If the thickness of the low melting point polyethylene terephthalate fiber is less than 3 deniers, durability may be deteriorated. If the thickness of the low melting point polyethylene terephthalate fiber is more than 6 deniers, the formability of the upper and lower plates may be lowered.

The fiber length of the low melting point polyethylene terephthalate fiber may be from 51 to 64 mm. If the fiber length of the low melting point polyethylene terephthalate fiber is less than 51 mm, the durability may be deteriorated. If the fiber length exceeds 64 mm, the formability of the upper and lower plates may be deteriorated.

Regular polyethylene terephthalate fiber is a structure for maintaining the rigidity of the upper and lower plates. The regular polyethylene terephthalate fiber may be contained in an amount of 10 to 40% by weight based on the total weight of the PET. If the content of the regular polyethylene terephthalate fibers is less than 10% by weight, durability of the upper and lower plates may be deteriorated. If the content exceeds 40% by weight, the formability of the upper and lower plates may be deteriorated.

The thickness of the regular polyethylene terephthalate fiber may be 3 to 10 denier. If the thickness of the regular polyethylene terephthalate fiber is less than 3 deniers, the strength may be lowered. If the regular polyethylene terephthalate fiber is more than 10 deniers, the sound absorption performance may be lowered.

The fiber length of the regular polyethylene terephthalate fiber may be 51 to 76 mm. When the fiber length of the regular polyethylene terephthalate fiber is less than 51 mm, it may cause bursting phenomenon in the web lamination, and when it is more than 76 mm, it may cause aggregation at the time of carding.

The melting point of the regular polyethylene terephthalate fiber may be 200 to 300 占 폚. If the melting point of the regular polyethylene terephthalate fiber is less than 200 캜, durability may be deteriorated, and if it exceeds 300 캜, carbonization may occur.

The flame retardant polyethylene terephthalate fiber may include PET and a flame retardant. For example, the flame retardant polyethylene terephthalate fiber can be formed by coating a flame retardant material on PET. For example, the flame-retardant polyethylene terephthalate fiber may be a mixture of PET and a flame retardant and then forming a fiber. The flame retardant polyethylene terephthalate fiber can impart flame retardancy to the upper plate 300 and the lower plate 100, respectively. The flame retardant polyethylene terephthalate fiber may be contained in an amount of 10 to 40% by weight based on the total weight of the PET. If the flame-retardant polyethylene terephthalate fiber is less than 10% by weight, flame retardancy may deteriorate. If it exceeds 40% by weight, the durability of the upper and lower plates may be deteriorated.

The thickness of the flame retardant polyethylene terephthalate fiber may be 3 to 10 denier. When the thickness of the flame-retardant polyethylene terephthalate fiber is less than 3 denier, the flame retardancy may be lowered, and if it is more than 10 denier, the sound-absorbing performance may be deteriorated.

The fiber length of the flame retardant polyethylene terephthalate fiber may be 51 to 76 mm. If the fiber length of the flame retardant polyethylene terephthalate fiber is less than 51 mm, the flame retardancy may be deteriorated. If the fiber length exceeds 76 mm, the absorbency can be deteriorated.

The melting point of the flame-retardant polyethylene terephthalate fiber may be 200 to 300 占 폚. If the melting point of the flame-retardant polyethylene terephthalate fiber is less than 200 캜, the durability may be deteriorated. If the melting point is more than 300 캜, carbonization may occur.

The upper plate 300 and the lower plate 100 will be described later in more detail.

The sound absorbing material 200 is provided between the lower plate 100 and the upper plate 300. The sound absorbing material 200 is fastened to the lower groove LH and the upper groove UH. The sound absorbing material 200 may include, for example, polypropylene. The sound absorbing material 200 may be, for example, micro-fabricated.

The weight of the sound absorbing material 200 may be 180 to 330 g / m ² . If the weight of the sound absorbing material 200 is less than 180 g / m ² , the sound absorption performance may deteriorate. If the weight of the fabric is more than 330 g / m ² , the cost increases, It is difficult to fasten it to the lower engaging groove LH and the upper engaging groove UH.

4 is a schematic perspective view of a top plate included in an engine cover according to an embodiment of the present invention.

1 to 4, the upper plate 300 may include a top plate body on which the upper groove UH is disposed and a skin layer (not shown) on the upper plate body. A part of the sound absorbing material 200 may be inserted into the upper groove UH.

The upper groove UH refers to a space formed by the upper plate body portion and may be an arbitrary divided space on the upper plate 300 or may refer to the inner space of the upper plate body portion. The upper groove UH provides a space in which the sound absorbing material 200 can be positioned together with the lower groove LH of the lower plate 100 when the upper plate 300 is coupled to the lower plate 100.

The skin layer is provided on the top plate body portion. The skin layer controls the outer shape of the upper plate 300 and protects the outer shape of the upper plate 300. The skin layer may comprise, for example, PET.

The fabric weight of the skin layer may be 200 to 400 g / m ² . If the fabric weight of the skin layer is less than 200 g / m ² , wrinkles or whitening may occur. If the fabric weight is more than 400 g / m ² , the product may not be molded or the product shape may not be clearly displayed.

The weight of the fabric of the nonwoven fabric included in the upper plate 300 may be 1400 to 2000 g / m ² . If the fabric weight is less than 1400 g / m ² , the durability of the top plate 300 may deteriorate. If the fabric weight exceeds 2000 g / m ² , cracks may occur in the top plate 300 due to external force.

FIG. 5A is a perspective view schematically showing a lower plate included in an engine cover according to an embodiment of the present invention when viewed from above. FIG. 5B is a perspective view schematically showing a bottom plate included in the engine cover according to an embodiment of the present invention when viewed from the bottom.

Referring to FIGS. 1 to 3, 5A and 5B, the lower plate 100 includes a lower plate body 110, a fastening portion 120, a reinforcing portion 130, and a through hole 140. The lower plate body 110, the coupling part 120, and the reinforcing part 130 may be integral.

The lower plate body 110 is provided with a lower groove LH. A part of the sound absorbing material 200 may be inserted into the lower groove LH. The lower groove (LH) may be provided with a through hole (140) passing through the lower plate body part (110). The number of the through holes 140 may be plural. Sound generated in the engine can be supplied to the sound absorbing material 200 through the through hole 140, and the sound absorbing effect can be maximized through resonance.

The fastening portion 120 protrudes downward from the lower plate body 110. The fastening portions 120 may be plural. For example, the number of the fastening portions 120 may be four. However, the present invention is not limited thereto, and the fastening portion 120 may have various numbers such as one, two, three, four or more, for fastening with the engine.

One end of the fastening portion 120 may include a hole. For example, one end of the fastening portion 120 spaced apart from the lower plate body 110 may include a hole. And a fastening means such as a bolt is inserted through the hole to fasten the engine and the engine cover.

The reinforcing portion 130 surrounds at least a part of the fastening portion 120. The reinforcing portion 130 can support the rigidity and durability of the fastening portion 120. For example, the reinforcing part 130 may surround the entire fastening part 120 in the form of a ring, and the reinforcing part 130 may be in contact with a part of the fastening part 120, and may partially surround the reinforcing part 130. For example, one reinforcing portion 130 connected to one fastening portion 120 may be one or a plurality of reinforcing portions.

The weight of the raw fabric of the nonwoven fabric included in the lower plate 100 may be 1000 to 1500 g / m ² . If the weight of the fabric is less than 1000 g / m ² , the durability of the lower plate 100 may be lowered. If the weight of the fabric is more than 1500 g / m ² , the weight may be excessively large.

An engine according to an embodiment of the present invention includes an upper plate and a lower plate each including a non-woven fabric including PET, and can be lightened while improving sound absorption. Since the nonwoven fabric is formed by spinning the PET fiber with a certain thickness, according to Helmholtz resonance in the acoustic engineering, the lower the density, the more the sound absorption is increased. Therefore, the upper and lower plates Sound can be absorbed. The upper and lower plates may be formed of nonwoven fabric to improve the durability against external force while reducing the weight of the engine cover.

Hereinafter, a method of manufacturing an engine cover according to an embodiment of the present invention will be described. Hereinafter, differences from the engine cover according to an embodiment of the present invention will be described in detail, and a description will be made of an engine cover according to an embodiment of the present invention.

6 is a flowchart schematically showing a method of manufacturing an engine cover according to an embodiment of the present invention. 7 is a flowchart schematically showing a step of producing a nonwoven fabric included in each of the steps of providing the upper plate and providing the lower plate.

1 to 6, a method of manufacturing an engine cover 10 according to an embodiment of the present invention includes a step (S100) of manufacturing a lower plate 100 by thermocompression bonding a nonwoven fabric, (S200) of manufacturing the lower plate 300 and providing the sound absorbing material 200 between the lower plate 100 and the upper plate 300 (S300).

The nonwoven fabric is provided in a mold and thermally bonded to produce a lower plate 100 (S100). The nonwoven fabric may be at least one of, for example, a needle punching nonwoven fabric, a spunbond nonwoven fabric, and a spunlaced nonwoven fabric. The nonwoven fabric is provided in a mold and thermocompression-bonded to produce an upper plate 300 (S200). The nonwoven fabric may be formed of the upper mold and the lower mold, and the nonwoven fabric may be positioned between the upper mold and the lower mold, followed by thermocompression (press) to form the nonwoven fabric in the shape of the lower plate 100 and / . In the step S100 of manufacturing the lower plate 100, the lower plate 100 includes a lower plate body 110, a fastening portion 120, and a reinforcing portion 130. [ The lower plate body 110, the coupling part 120, and the reinforcing part 130 may be integral.

The present invention is characterized in that the lower plate (100) is formed by a pressing process using a metal mold. Conventionally, in forming an engine cover, a fastening member for engaging the engine cover and the engine is formed by a separate injection process and then attached to the engine cover. Therefore, the end of the fastening member can not be inserted and formed as shown in FIG. 8, so that the degree of freedom of design is considerably reduced, and the process of manufacturing the engine cover is extremely troublesome. As described above, since the bar fastening part 120 for manufacturing the lower plate 100 in the pressing process and the hole at the end thereof are not formed, the degree of freedom of design is extremely high. Also, it is possible to greatly simplify the manufacturing process of the bar cover, which can complete the lower plate 100 by only one pressing process (pressing).

The lower plate body 110 is provided with a lower groove LH. A part of the sound absorbing material 200 may be inserted into the lower groove LH. The lower engaging groove LH may be provided with a through hole 140 passing through the lower plate body 110. The through holes may be plural.

The fastening portion 120 protrudes downward from the lower plate body 110. One end of the fastening portion 120 may include a hole. The reinforcing portion 130 surrounds at least a part of the fastening portion 120.

In step S200 of manufacturing the top plate 300, the top plate 300 may include a top plate body portion and a skin layer. The top plate body portion is provided with an upper groove UH. A part of the sound absorbing material 200 may be inserted into the upper groove UH.

Step S100 of manufacturing the lower plate 100 and step S200 of manufacturing the upper plate 300 may be performed by thermocompression at 70 to 120 kgf / cm 2 for 70 to 90 seconds. If the temperature is less than the above range, the forming process can not be performed sufficiently. If the temperature is less than the above range, the overpressure of the molding die may cause problems in the durability of the lower plate 100 and the upper plate 300.

At least one of the step S100 of manufacturing the lower plate 100 and the step S200 of manufacturing the upper plate 300 includes preheating the nonwoven fabric at 180 to 240 DEG C for 70 to 110 seconds. If preheated below the above range, the heat resistance of the product may deteriorate, and if it is preheated beyond the above range, carbonization may occur in the product.

Each of the steps of manufacturing the lower plate 100 (S100) and manufacturing the upper plate 300 (S200) may further include a cooling step. The cooling step may be performed, for example, with cooling water. The temperature of the cooling water may be, for example, 0 to 20 ° C. If it is less than 0 占 폚, cooling efficiency relative to the temperature of the cooling water may be lowered, and if it exceeds 20 占 폚, cooling may not be sufficiently performed.

Referring to FIGS. 1 to 7, a step S100 of manufacturing the lower plate 100 and a step S200 of manufacturing the upper plate 300 may be performed by preparing a fiber including polyethylene terephthalate (PET) A step S2000 of producing a web with fibers, and a step S3000 of producing a nonwoven fabric by a web.

Prepare fibers (S1000). The fibers may be short fibers, long fibers, filament yarns or mixtures thereof. The fibers include PET. PET comprises from 40 to 50% by weight of low melting point polyethylene terephthalate fibers, from 10 to 40% by weight of regular polyethylene terephthalate fibers, and from 10 to 40% by weight of flame retardant polyethylene terephthalate fibers, based on the total weight of PET .

The web is made of fiber (S2000). The method for producing the web is not particularly limited and can be produced by, for example, an air laid method, a wet method, a spun bond (meltblown, flash irradiation) method or the like.

A nonwoven fabric is manufactured on the web (S3000). The nonwoven fabric may be at least one of, for example, a needle punching nonwoven fabric, a spunbond nonwoven fabric, and a spunlaced nonwoven fabric. For example, when the nonwoven fabric is a needle punching nonwoven fabric, the laminated web may be needle punched to produce a needle punching nonwoven fabric.

A sound absorbing material 200 is provided between the lower plate 100 and the upper plate 300 (S300). The sound absorbing material 200 may be inserted into and engaged with the lower groove LH of the lower plate 100 and the upper groove UH of the upper plate 300. The sound absorbing material 200 may include, for example, polypropylene. The sound absorbing material 200 may be, for example, micro-fabricated.

The method of manufacturing the engine cover 10 according to an embodiment of the present invention further includes providing heat to the lower plate 100 and the upper plate 300 to thermally weld them to each other.

The engine cover manufactured by the method of manufacturing an engine cover according to an embodiment of the present invention includes an upper plate and a lower plate each including a non-woven fabric including PET, so that the weight of the engine cover can be improved while improving sound absorption. In addition, it is possible to improve the durability against an external force while reducing the weight.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative and non-restrictive in every respect.

10: engine cover 100; Bottom plate
110: lower plate body part 120: fastening part
130: reinforcement part 140: through hole
200: Sound absorbing material
300: top plate
LH: Lower groove UH: Upper groove

Claims (20)

Lower plate;
A sound absorbing material provided on the lower plate; And
And a top plate provided on the sound absorbing material and fastened to the bottom plate,
Each of the lower plate and the upper plate
A nonwoven fabric,
The nonwoven fabric may include polyethylene terephthalate (PET)
Wherein the upper plate includes a top plate body having an upper groove disposed therein; And
And a skin layer provided on the top plate body portion,
And the skin weight of the skin layer is 200 to 400 g / m ² .
The method according to claim 1,
Wherein the lower plate includes a lower groove,
Wherein the upper plate includes an upper groove,
The sound-
And the upper groove is located in a space formed by the lower groove and the upper groove. delete The method according to claim 1,
The skin layer
An engine cover comprising polyethylene terephthalate (PET). delete The method according to claim 1,
The weight of the fabric of the nonwoven fabric included in the upper plate is
1400 to 2000 g / m < ² >. The method according to claim 1,
The PET
40 to 50% by weight of a low melting point polyethylene terephthalate fiber;
10 to 40% by weight of regular polyethylene terephthalate fibers; And
10 to 40% by weight of flame retardant polyethylene terephthalate fibers. 8. The method of claim 7,
The low melting point polyethylene terephthalate fiber
And a melting point of 160 to 200 캜. The method according to claim 1,
The sound-
An engine cover comprising polypropylene. The method according to claim 1,
The weight of the sound absorbing material
180 to 330 g / m < ² >. The method according to claim 1,
The lower plate
A lower plate body on which the lower groove is disposed;
A fastening part projecting downward from the lower plate body part and fastened to the engine; And
And a reinforcing portion surrounding at least a part of the fastening portion. 12. The method of claim 11,
And a through hole penetrating the lower plate body is disposed in the lower groove. 12. The method of claim 11,
Wherein the lower plate body, the fastening portion, and the reinforcing portion are integral. The method according to claim 1,
The fabric weight of the nonwoven fabric included in the lower plate is
1000 to 1500 g / m < ² >. The method according to claim 1,
From the top,
And a part of the upper plate covers the entire lower plate. Thermocompression bonding the nonwoven fabric to produce a lower plate;
Thermosetting the nonwoven fabric to produce an upper plate; And
And providing a sound absorbing material between the lower plate and the upper plate,
Each of the steps of producing the lower plate and of manufacturing the upper plate
Preparing a fiber including polyethylene terephthalate (PET);
Fabricating the web with the fibers; And
And a nonwoven fabric is produced from the web,
Wherein the upper plate includes a top plate body having an upper groove disposed therein; And
And a skin layer provided on the top plate body portion,
The fabric weight of the skin layer is 200 to 400 g / m ² ,
The lower plate includes a lower plate body on which a lower groove is disposed, and a fastening part protruding downward from the lower plate body to be fastened to the engine,
Wherein the step of fabricating the lower plate comprises pressing the nonwoven fabric on a metal mold and pressing the nonwoven fabric in the form of the lower plate integrally formed with the lower plate body and the fastening portion. 17. The method of claim 16,
Further comprising providing heat to the lower plate and the upper plate so as to be thermally welded to each other. 17. The method of claim 16,
At least one of the steps of producing the lower plate and of producing the upper plate
And preheating the nonwoven fabric at 180 to 240 DEG C for 70 to 110 seconds. 17. The method of claim 16,
Each of the steps of producing the lower plate and of manufacturing the upper plate
And thermocompression is performed for 70 to 90 seconds at 70 to 120 kgf / cm < 2 >. delete

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