KR20190062328A - Urea tank for vehicle and fanufacturing method of the same - Google Patents

Abstract

The present invention relates to a urea tank for a vehicle and a manufacturing method thereof which can prevent deflection of the vicinity of a through hole of a lower tank. According to the present invention, the urea tank for a vehicle comprises: an upper tank having an opened lower portion and protruding upwards to form a space therein to store a fluid; a lower tank which has an opened lower portion, is dented downwards to form a space therein to store a fluid, allows an edge of an upper surface thereof to be coupled to an edge of a lower surface of the upper tank, and has a through hole formed on a dented lower portion thereof; a lower baffle which has a shape protruding towards the internal space of the lower tank on the inner side of a lower portion of the lower tank, is arranged along an edge of the through hole, and has a prescribed height; and an upper baffle which has a shape protruding towards the internal space of the upper tank on the inner side of an upper portion of the upper tank, is arranged on a position of the lower tank facing the lower baffle when the upper and the lower tank are coupled, and has a prescribed height.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a urea water tank for a vehicle,

The present invention relates to a urea water tank for a vehicle and a manufacturing method thereof.

Recently, as environmental pollution becomes an issue, eco-friendly technologies for reducing environmental pollution are attracting attention. Particularly, in the case of vehicles, the development of environmentally friendly vehicles is actively under way. However, most of the vehicles are still using gasoline or diesel as fuel, and this trend seems to be maintained for a long time.

On the other hand, in a vehicle, an exhaust gas is generated when an engine is operated, and in particular, in the case of a diesel engine, exhaust gas containing a large amount of nitrogen oxides (NOx) is discharged to the outside. As the combustion temperature increases, the amount of nitrogen oxides (NOx) increases as the combustion temperature increases and serious air pollution occurs when the exhaust gas is discharged. Therefore, in order to reduce the amount of nitrogen oxides, the combustion temperature of the engine is controlled, So that a method of installing and cleaning is performed.

Conventionally, Urea-Selective Catalyst Reduction (UREA-SCR) has been applied to purify nitrogen oxides emitted from diesel vehicles. Here, the selective catalytic reaction system including the urea injection precisely injects the urea water into the exhaust pipe through various sensors such as the nitrogen oxide sensor and the urea water injection control device, the injected urea water is pyrolyzed by the exhaust gas heat and converted into ammonia, Ammonia reacts with nitrogen oxides in the SCR catalyst to decompose them into water and nitrogen, thereby reducing nitrogen oxides in the exhaust gas. In order to utilize this technique, the vehicle must be equipped with a tank for storing urea water in the vehicle and a urea water pump for supplying urea water.

In the prior art, the urea water pump is inserted into the through hole formed in the urea water tank, and the urea water pump is connected to the urea water tank using the heat fusion method. In the process of fusing the urea water pump, There is a problem that the fused portion around the through hole is struck by the Z axis.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

Korean Patent Registration No. 10-1205232

SUMMARY OF THE INVENTION The present invention has been conceived to overcome the above problems, and it is an object of the present invention to provide an upper baffle on an upper inner side surface of an upper tank to support a lower pump in a process of fusing a pump, It is an object of the present invention to provide a urea water tank for a vehicle and a manufacturing method which can prevent the vicinity of the through hole from being stuck in the Z axis.

In order to achieve the above object, the present invention provides an elliptical water tank for a vehicle, comprising: an upper tank having a lower portion and protruding upwardly and having a space for storing fluid therein; A lower tank having a top opened and a downwardly recessed space for storing a fluid therein, an upper rim coupled with a lower rim of the upper tank, and a through hole formed in the lower rim of the upper tank; A lower baffle which is formed to protrude from the lower inner surface of the lower tank toward the inner space of the lower tank and is formed along the rim of the through hole and has a constant height; And an upper baffle protruding toward the inner space of the upper tank from an upper inner surface of the upper tank and formed at a position facing the lower baffle of the lower tank when the upper tank and the lower tank are coupled to each other and having a predetermined height; .

The pump is inserted into the through hole of the lower tank, and the pump can be welded to the rim of the through hole.

When the pump is fused, the lower baffle is pressed toward the upper tank together with the vicinity of the through hole, and the lower baffle to be pressurized is supported by the upper baffle of the upper tank so that the z-axis deflection around the lower tank through hole can be prevented.

The upper baffle is constituted by a first baffle and a second baffle arranged to be spaced apart from each other in a running direction of the vehicle, the first baffle and the second baffle each extending along the running direction of the vehicle and spaced apart in the width direction of the vehicle, And a plurality of baffle pieces.

The front portion of the lower baffle faces the first baffle, and the rear portion of the lower baffle faces the second baffle.

The baffle piece of the first baffle and the baffle piece of the second baffle can be arranged to be shifted with respect to the vehicle running direction.

The inner surface of the upper tank is provided with a cross baffle spaced from the first baffle or the second baffle along the running direction of the vehicle. The cross baffle has a bent cross section, and the portion protruded by bending is formed to face the lower baffle .

The first baffle and the second baffle each comprise a plurality of baffle pieces extending along the running direction of the vehicle and spaced apart from each other in the width direction of the vehicle, Lt; / RTI >

The side point corresponding to the outside of the second baffle of the side surface of the upper tank may be an inclined surface inclined with respect to the running direction of the vehicle.

The cross baffle is provided outside the first baffle, and a side point corresponding to the outside of the cross baffle among the side surfaces of the upper tank may be a surface in a direction crossing the vehicle running direction.

The upper baffle and the lower baffle may be in such a state that the respective opposite ends of the upper tank and the lower tank are spaced apart from each other when the coupling between the upper tank and the lower tank is completed.

The lower baffle may be formed to be higher than the height of the pump that is thermally welded through the through hole of the lower tank.

The upper tank and the upper baffle may be integrally molded and made of a plastic material.

The lower tank and the lower baffle are integrally formed and may be made of a plastic material.

According to another aspect of the present invention, there is provided a method of manufacturing a urea water tank for a vehicle, comprising the steps of: preparing an upper tank, an upper baffle, a lower tank and a lower baffle by injection molding; And joining the bottom edge of the upper tank and the upper edge of the lower tank using a heat welding method.

After the step of joining the upper tank and the lower tank, inserting the pump into the lower tank through the through hole formed in the lower portion of the lower tank; Pressurizing the pump to thermally fuse the rim of the pump to the outer surface of the rim of the lower tank through hole; And releasing and cooling the pressing force applied to the pump.

In the step of manufacturing the upper tank and the lower tank, the upper baffle and the lower baffle can be integrally formed with the upper tank and the lower tank, respectively.

According to the urea water tank for a vehicle and the method of manufacturing the same, the upper baffle is provided on the upper inner surface of the upper tank to support the lower pump in the process of fusing the pump, It is possible to prevent the periphery of the through-hole in the Z-axis from being stuck.

Further, since the first baffle and the second baffle are constituted by a plurality of baffle pieces arranged in parallel and spaced apart from each other in the vehicle width direction, when the number of elements in the tank is fluctuated due to sudden braking of the vehicle or the like, , A plurality of baffle pieces spaced apart from each other by a predetermined distance are dispersed in the flow of the urea water flowing in the running direction of the vehicle, thereby reducing the flow noise of the urea water.

In addition, by disposing the baffle pieces of the first baffle and the baffle pieces of the second baffle shifted with respect to the running direction of the vehicle, the flow of the urea water can be dispersed twice, thereby further reducing the flow noise.

Further, the portion projecting by the bending of the cross baffle is formed so as to face the point between the baffle pieces, whereby the flow of the urea water distributed through the first baffle and the second baffle is dispersed again by the projecting portion of the cross baffle , It is possible to more effectively reduce the flow noise of the urea water.

In addition, by forming the side surface point corresponding to the outside of the second baffle in the side surface of the upper tank as an inclined surface, it is possible to more effectively use the space inside the limited tank without additional cross baffles and to further reduce the flow noise of the urea water .

Furthermore, by providing the lower baffle around the through hole into which the pump is inserted, the pump can be protected, and when the urea water is frozen as in winter, only the number of elements between the lower baffle and the pump is melted It is possible to supply urea water more stably even when the number of elements is frozen as in winter.

1 is a view showing the interior of an upper tank of an urea water tank for a vehicle according to an embodiment of the present invention.
2 is a view showing the interior of a lower tank of an urea water tank for a vehicle according to an embodiment of the present invention.
3 is a perspective view of the urea water tank for a vehicle according to the embodiment of the present invention, in which the upper tank and the lower tank are combined.
4 is a view showing a state before the pump is fused to the lower tank in the urea water tank for a vehicle according to the embodiment of the present invention.
5 is a view showing a state where a pump is welded to a lower tank in a urea water tank for a vehicle according to an embodiment of the present invention.
6 is a flowchart illustrating a method of manufacturing a vehicle element number tank according to an embodiment of the present invention.

Specific structural and functional descriptions of the embodiments of the present invention disclosed herein are for illustrative purposes only and are not to be construed as limitations of the scope of the present invention. And should not be construed as limited to the embodiments set forth herein or in the application.

The embodiments according to the present invention are susceptible to various changes and may take various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first and / or second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are intended to distinguish one element from another, for example, without departing from the scope of the invention in accordance with the concepts of the present invention, the first element may be termed the second element, The second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms " comprises ", or " having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be construed as meaning consistent with meaning in the context of the relevant art and are not to be construed as ideal or overly formal in meaning unless expressly defined herein .

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

FIG. 1 is a view showing the interior of an upper tank of an urea water tank for a vehicle according to an embodiment of the present invention, FIG. 2 is a view showing the interior of a lower tank of a urea water tank for a vehicle, FIG. 4 is a view showing a state before the pump is fused to the lower tank, and FIG. 5 is a view showing a state where the pump is fused to the lower tank.

1 to 3, an urea water tank for a vehicle according to an embodiment of the present invention includes an upper tank 100, an upper baffle 110 formed on an upper inner surface of the upper tank 100, a lower tank 200, And a lower baffle 120 formed on a lower inner surface of the lower tank 200. The lower baffle 120 may further include a pump 300 according to an embodiment of the present invention. Hereinafter, the detailed configuration and characteristics of the urea water tank for a vehicle will be described in more detail.

The upper tank 100 may have a lower opening and a space protruding upward to store fluid therein. The upper tank 100 in FIG. 1 is in a state in which the upper tank 100 is turned upside down to explain the inside. As will be described later, the bottom edge of the upper tank 100 may be engaged with the upper edge of the lower tank 200 to couple the upper tank 100 and the lower tank 200 together.

1 and 3, the upper baffle 110 may protrude from the upper inner surface of the upper tank 100 toward the inner space of the upper tank 100. The upper baffle 110 may be provided at a position facing the lower baffle 210 of the lower tank 200 when the upper tank 100 and the lower tank 200 are coupled to each other, . The reason why the upper baffle 110 is provided to have a predetermined height at a position facing the lower baffle 210 of the lower tank 200 when the upper tank 100 and the lower tank 200 are coupled is that the pump 300 The lower baffle 210 of the lower tank 200 is supported to prevent the Z axis from being stuck around the through hole of the lower tank 200. [ 4 and 5, when the pump 300 is fused, the lower baffle 210 is pressed toward the upper tank 100 together with the peripheries of the through holes of the lower tank 200, The upper baffle 110 is formed to have a constant height at a position facing the lower baffle 210 as shown in FIG. 3, The lower baffle 210 stuck to the Z axis can be supported. That is, in the welding process, the upper baffle 110 supports the lower baffle 120 to prevent the periphery of the through-hole of the lower tank 200 from being stuck in the Z-axis.

1, the upper baffle 110 may include a first baffle 112 and a second baffle 114 that are spaced apart from each other with respect to a running direction of the vehicle. At this time, the first baffle 112 may face the front portion of the lower baffle 210, and the second baffle 114 may be disposed to face the rear portion of the lower baffle 210.

More specifically, the first baffle 112 and the second baffle 114 may each be composed of a plurality of baffle pieces extending along the running direction of the vehicle and spaced apart in the width direction of the vehicle and disposed side by side. According to an embodiment, the first baffle 112 may be configured as three baffle pieces and the second baffle 114 as four baffle pieces as shown in FIG. 1, The number of baffle pieces constituting the first baffle 112 and the second baffle 114 is not limited to a specific number and can be effectively prevented when the pump 300 is fused to effectively prevent deflection of the Z axis around the through hole of the lower tank 200 Multiple numbers of multiple baffle pieces may constitute the first baffle and the second baffle.

In addition, since the first baffle 112 and the second baffle 114 are constituted by a plurality of baffle pieces arranged in parallel and spaced apart from each other in the vehicle width direction, the number of elements in the tank is caused by the rapid braking of the vehicle, A plurality of baffle pieces arranged in parallel and spaced apart from each other by a predetermined distance disperses the flow of the urea water flowing in the running direction of the vehicle, thereby reducing the flow noise of the urea water.

Further, according to the embodiment, the baffle pieces of the first baffle 110 and the baffle pieces of the second baffle 120 may be arranged to be shifted with respect to the vehicle running direction. The baffle pieces of the first baffle 110 and the baffle pieces of the second baffle 120 are arranged to be shifted from each other with respect to the direction of travel of the vehicle, Flows again through the plurality of baffle pieces of the second baffle piece 120, and as a result, the flow noise of the number of urea can be more effectively reduced. That is, according to the present invention, the baffle pieces of the first baffle 110 and the baffle pieces of the second baffle 120 are shifted with respect to the vehicle running direction, so that the flow of urea water can be dispersed twice, Can be further reduced.

The cross baffle 116 may be provided on the inner surface of the upper tank 110 and may be spaced from the first baffle 112 or the second baffle 114 along the vehicle running direction. More specifically, referring to FIG. 1, according to an embodiment, the cross baffle 116 may have a bent cross section, and the portion protruding by bending may be formed to face the lower baffle 210.

Further, it may be formed so as to face the point between the partly-shaped baffle pieces projected by the bending of the cross baffle 116. That is, as shown in FIG. 1, a portion protruding by the bending of the cross baffle 116 may be formed so as to face a point between the baffle pieces of the first baffle 112. As such, the portion of the cross baffle 116 that is projected by bending is directed toward the point between the baffle pieces, so that the flow of urea water dispersed through the first baffle 112 and the second baffle 114 crosses the cross baffle 116, the flow noise of the urea water can be more effectively reduced.

Depending on the embodiment, the cross baffle 116 may be provided outside the first baffle 112, wherein a side point corresponding to the outside of the cross baffle 116 in the side of the upper tank 100, As shown in Fig. According to the embodiment, a side point corresponding to the outside of the cross baffle 116 in the side surface of the upper tank 100 may be a surface in a direction perpendicular to the vehicle running direction.

Meanwhile, the side point corresponding to the outside of the second baffle 114 in the side surface of the upper tank 100 may be an inclined surface inclined with respect to the running direction of the vehicle. If the lateral point corresponding to the outside of the second baffle 114 in the side surface of the upper tank 100 is a surface orthogonal to the running direction of the vehicle, the flow noise generated when the urea water hits the inner wall of the tank is relatively It will be big. However, in the present invention, the side surface corresponding to the outside of the second baffle 114 in the side surface of the upper tank 100 is formed as an inclined surface, so that the space inside the limited tank can be efficiently used without providing additional cross baffles The flow noise of the number of urea can be further reduced.

In the present invention, the upper tank 100, the upper baffle 110 and the cross baffle 116 may be integrally formed, and may be made of a plastic material according to an embodiment.

The lower tank 200 has a top opening and a downward opening to form a space for storing a fluid therein, and an upper edge of the lower tank 200 can be coupled with a bottom edge of the upper tank 100. In addition, a through hole may be formed in the bottom surface of the recessed portion of the lower tank 200. The pump 300 can be inserted into the through hole formed in the lower portion of the lower tank 200, and the pump 300 can be fused with the rim of the through hole. Specifically, the pump 300 is inserted into the lower tank 200 through the through hole formed in the lower portion of the lower tank 200, and then the pressure of the pump 300 is applied to the lower portion of the pump 300, The pump 300 is thermally fused to the outer surface of the rim of the through hole of the tank 200 and then the pressure applied to the pump 300 is released and cooled to cool the pump 300 through the through hole of the lower tank 200 ) To be bonded to each other.

Referring to FIG. 2, the lower baffle 210 may protrude from the lower inner surface of the lower tank 200 toward the inner space of the lower tank 200. Further, the lower baffle 210 may be provided along the through hole, and may have a predetermined height. That is, the lower baffle 210 in the present invention may be an annular baffle having a predetermined height provided along the through hole. The lower baffle 210 may be formed to have a height higher than that of the pump 300 inserted through the through holes of the lower tank 200 to be fused. That is, the lower baffle 210 is formed to be higher than the height of the pump 300, so that the upper baffle 110 can be prevented from touching the pump 300 when the upper tank 100 and the lower tank 200 are engaged. In addition, in the present invention, the lower baffle 210 may be formed integrally with the lower tank 200, and may be made of a plastic material according to an embodiment.

In the present invention, the lower baffle is provided around the through hole into which the pump is inserted, thereby protecting the pump. Even when the urea water is frozen as in winter, only the number of elements between the lower baffle and the pump is melted It is possible to supply urea water more stably even when the number of elements is frozen as in winter.

In the present invention, the upper baffle 110 and the lower baffle 210 may be separated from each other in a state where the upper tank 100 and the lower tank 200 are completely coupled. The upper baffle 110 and the lower baffle 210 spaced apart from each other come into contact with each other when the pump 300 is inserted into the through hole of the lower tank 200 and press- The upper baffle 110 and the lower baffle 210 can be separated from each other by supporting the baffle 210 to prevent the Z axis from being deflected around the through hole and releasing the pressure after fusion. If the upper baffle 110 and the lower baffle 210 come into contact with each other while the upper tank 100 and the lower tank 200 are coupled to each other, The upper baffle 110 and the lower baffle 210 may be damaged and noise may be generated at the contact surfaces of the ends of the upper baffle 110 and the lower baffle 210. In the present invention, And the lower baffle 210 are spaced apart from each other.

6 is a flowchart illustrating a method of manufacturing a vehicle element number tank according to an embodiment of the present invention. As shown in FIG. 6, a method for manufacturing a vehicle element water tank according to an embodiment of the present invention includes the steps of: manufacturing an upper tank, an upper baffle, a lower tank, and a lower baffle by injection molding; And joining the rim of the lower tank with the rim of the upper surface of the lower tank using a heat welding method. After the step of joining the upper tank and the lower tank, Through the through hole formed in the lower tank; Pressurizing the pump to thermally fuse the rim of the pump to the outer surface of the rim of the lower tank through hole; And releasing and cooling the pressing force applied to the pump. Here, in the step of manufacturing the upper tank and the lower tank, the upper baffle and the lower baffle may be integrally formed with the upper tank and the lower tank, respectively.

As described above, according to the urea water tank for a vehicle and the manufacturing method thereof, the upper baffle is provided on the upper inner side surface of the upper tank to support the lower pump in the process of fusing the pump, It is possible to prevent the periphery of the through-hole of the lower tank from being stuck in the Z-axis when fused.

Further, since the first baffle and the second baffle are constituted by a plurality of baffle pieces arranged in parallel and spaced apart from each other in the vehicle width direction, when the number of elements in the tank is fluctuated due to sudden braking of the vehicle or the like, , A plurality of baffle pieces spaced apart from each other by a predetermined distance are dispersed in the flow of the urea water flowing in the running direction of the vehicle, thereby reducing the flow noise of the urea water.

In addition, by disposing the baffle pieces of the first baffle and the baffle pieces of the second baffle shifted with respect to the running direction of the vehicle, the flow of the urea water can be dispersed twice, thereby further reducing the flow noise.

Further, the portion projecting by the bending of the cross baffle is formed so as to face the point between the baffle pieces, whereby the flow of the urea water distributed through the first baffle and the second baffle is dispersed again by the projecting portion of the cross baffle , It is possible to more effectively reduce the flow noise of the urea water.

In addition, by forming the side surface point corresponding to the outside of the second baffle in the side surface of the upper tank as an inclined surface, it is possible to more effectively use the space inside the limited tank without additional cross baffles and to further reduce the flow noise of the urea water .

Furthermore, by providing the lower baffle around the through hole into which the pump is inserted, the pump can be protected, and when the urea water is frozen as in winter, only the number of elements between the lower baffle and the pump is melted It is possible to supply urea water more stably even when the number of elements is frozen as in winter.

100: upper tank 110: upper baffle
112: First baffle 114: Second baffle
116: Cross baffle 200: Lower tank
210: lower baffle 300: pump

Claims (15)

An upper tank having an open bottom and a top protruding upward to define a space for storing fluid therein;
The upper part of the upper tank is opened and the lower part is recessed to store a fluid therein. An upper edge of the upper part is coupled with a lower edge of the upper tank. A through hole is formed in the lower part of the upper tank. A lower tank in which the pump is pressurized and fused around the through hole;
A lower baffle which is shaped to protrude from an inner bottom surface of the lower tank toward an inner space of the lower tank and is formed in a cylindrical shape having a predetermined height along the rim of the through hole to surround the side surface of the pump; And
The upper tank is provided with a lower baffle and a lower baffle. The upper tank has a lower baffle and a lower baffle. And an upper baffle formed to intersect the upper end of the upper baffle,
And the upper end of the lower baffle is supported at the lower end of the upper baffle when the pump is welded, thereby preventing the Z axis from being deflected around the through hole. The method according to claim 1,
The upper baffle is constituted by a first baffle and a second baffle arranged to be spaced apart from each other in a running direction of the vehicle, the first baffle and the second baffle each extending along the running direction of the vehicle and spaced apart in the width direction of the vehicle, And a plurality of baffle pieces arranged in a circumferential direction. The method of claim 2,
Wherein a front portion of the lower baffle faces the first baffle and a rear portion of the lower baffle faces the second baffle. The method of claim 2,
Wherein the baffle piece of the first baffle and the baffle piece of the second baffle are disposed shifted with respect to the vehicle running direction. The method of claim 2,
The inner surface of the upper tank is provided with a cross baffle spaced from the first baffle or the second baffle along the running direction of the vehicle. The cross baffle has a bent cross section, and the portion protruding by bending is formed to face the lower baffle And a plurality of the ellipses. The method of claim 5,
The first baffle and the second baffle each comprise a plurality of baffle pieces extending along the running direction of the vehicle and spaced apart from each other in the width direction of the vehicle, Of the elliptical shape of the ellipse. The method of claim 2,
And a side point corresponding to an outer side of the second baffle of the side surface of the upper tank is an inclined surface inclined with respect to the vehicle running direction. The method of claim 5,
Wherein a cross baffle is provided outside the first baffle and a side point corresponding to an outer side of the cross baffle among the side surfaces of the upper tank is a surface crossing the vehicle running direction. The method according to claim 1,
Wherein the upper baffle and the lower baffle are in such a state that the respective opposite ends of the upper baffle and the lower baffle are spaced apart from each other when the upper tank and the lower tank are engaged. The method according to claim 1,
Wherein the lower baffle is formed to be higher than a height of a pump that is thermally welded through the through hole of the lower tank. The method according to claim 1,
Characterized in that the upper tank and the upper baffle are integrally molded and made of a plastic material. The method according to claim 1,
Wherein the lower tank and the lower baffle are integrally formed and made of a plastic material. A method of manufacturing an urea water tank for vehicles according to claim 1,
Fabricating an upper tank, an upper baffle, a lower tank and a lower baffle by injection molding; And
And joining the bottom edge of the upper tank and the upper edge of the lower tank using a heat welding method. 14. The method of claim 13,
After the step of joining the upper tank and the lower tank,
Inserting the pump into the lower tank through the through hole formed in the lower portion of the lower tank;
Pressurizing the pump to thermally fuse the rim of the pump to the outer surface of the rim of the lower tank through hole; And
Further comprising the step of releasing and cooling the pressing force applied to the pump. 14. The method of claim 13,
Wherein the upper baffle and the lower baffle are integrally formed with the upper tank and the lower tank, respectively, in the step of manufacturing the upper tank and the lower tank.

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