CN117963006A - White car body cavity sealing structure, sealing method and car - Google Patents

Abstract

The application relates to the technical field of vehicle bodies, and provides a white vehicle body cavity sealing structure, a sealing method and a vehicle, wherein the white vehicle body cavity sealing structure comprises an expansion rubber sheet and a bracket; the shape of the expansion film is matched with the shape of the part to be sealed of the cavity of the white body, the expansion film with a specific shape can be obtained in a blanking mode, and the expansion film is connected with the white body through a bracket; the expansion film comprises a plate, a first foaming body and a second foaming body to be foamed; the plate is provided with a first surface and a second surface which are opposite, the first foam body is attached to the first surface, and the second foam body is attached to the second surface; the middle part of the expansion film is provided with a paint flowing hole, and the first foaming body and the second foaming body are used for filling the paint flowing hole under the condition that the first foaming body and the second foaming body are foamed; the application cuts out the expansion film with the corresponding shape according to the outline shape of the cavity to seal the cavity, has simple structure and good adaptability, and can play a good role in sealing and sound insulation for the cavity.

Description

White car body cavity sealing structure, sealing method and car

Technical Field

The application relates to the technical field of vehicle bodies, in particular to a white vehicle body cavity sealing structure, a white vehicle body cavity sealing method and a white vehicle.

Background

The white body refers to a body which is welded but not coated, and a plurality of closed stiffening beam structures such as an A column, a B column, a C column, a threshold, a front wall, a side wall and the like are arranged on the white body, and a plurality of cavities are arranged on the structures, so that when the vehicle runs at a high speed, high-speed air flow movement can be generated in the cavities, and strong noise and vibration are brought to passengers and drivers, and therefore, the cavities are required to be filled and sealed.

In the related art, the foaming material is fixed through the bracket, so that the expansion direction of the foaming material is controlled to fill and seal the cavity, however, for different cavity shapes, different brackets are required to be designed, the universality is poor, different bracket molds are required to be designed, and the cost is high.

Disclosure of Invention

Based on the above, it is necessary to provide a body-in-white cavity sealing structure, a sealing method and a vehicle, aiming at the problems of poor universality and high cost of sealing elements in the process of sealing the body-in-white cavity in the related art.

In a first aspect, the present application provides a body-in-white cavity seal structure comprising: an expansion film and a bracket; the shape of the expansion rubber sheet is matched with the shape of a part to be sealed of a cavity of the white automobile body; the expansion film comprises a plate, a first foaming body and a second foaming body to be foamed; the plate is provided with a first surface and a second surface which are opposite, the first foam body is attached to the first surface, and the second foam body is attached to the second surface; the middle part of the expansion film is provided with a paint flowing hole, and the first foam body and the second foam body are used for filling the paint flowing hole under the condition that the first foam body and the second foam body are foamed; the inflatable film is used for being connected with a white car body through the bracket.

In one embodiment, the bracket comprises a fastener and a sheet metal bracket body; the metal plate frame body comprises a first metal plate and a second metal plate, the first metal plate is connected with the second metal plate, the first metal plate extends along a first plane, the second metal plate extends along a second plane, and the first plane and the second plane are arranged at an angle; the first metal plate is connected with the expansion film through the fastener, and the second metal plate is used for welding with the white car body.

In one embodiment, the plate is provided with a plurality of through holes, and the first foam body is connected with the second foam body through a plurality of through holes.

In one embodiment, the sheet material is configured as a galvanized steel sheet.

In one embodiment, the materials of the first foam and the second foam are ethylene-vinyl acetate copolymer.

In one embodiment, the sheet has a thickness in the range of 0.2mm to 0.4mm.

In one embodiment, the first foam has a thickness in the range of 1.0mm to 2.0mm and the second foam has a thickness in the range of 1.0mm to 2.0mm.

In one embodiment, the foaming temperature range of the first foam and the foaming temperature range of the second foam are each 160 ℃ to 170 ℃, and the volume change rate of the first foam and the volume change rate of the second foam are each 800% or more.

In a second aspect, the present application also provides a sealing method applied to the body-in-white cavity sealing structure as described above, including:

Arranging an expansion rubber sheet at a part to be sealed of a cavity of a white automobile body, and forming a gap between the edge of the expansion rubber sheet and the inner wall surface of the cavity;

and after the electrophoretic paint enters the cavity through the gap and the paint flow hole and the inner wall surface of the cavity is subjected to electrophoretic paint plating, drying the white automobile body for a preset time at a preset temperature.

In a third aspect, the application also provides a vehicle comprising a body-in-white cavity seal arrangement as described above.

According to the body-in-white cavity sealing structure, the sealing method and the vehicle, in the process of sealing the cavity, firstly, the expansion film corresponding to the outline shape is punched according to the outline shape of the to-be-sealed part of the cavity, the obtained expansion film can just cover the to-be-sealed part, after being fixed with the body-in-white through the bracket, the expansion film is initially arranged at the to-be-sealed part, after the electrophoretic coating is finished, the body-in-white enters an electrophoretic drying furnace, the first foaming body and the second foaming body are heated and begin to foam and expand, so that gaps in the cavity are gradually filled, paint holes are filled, and a good sealing and sound insulation effect is achieved on the cavity; in the process, the plate is equivalent to the framework of the expansion film, can maintain the expansion film in a specific shape, ensures the integral strength of the expansion film, and can also play a role in restraining and controlling the expansion direction of the first foaming body and the second foaming body to a certain extent; compared with the sealing mode in the related art, the white car body cavity sealing structure does not need to design a bracket with a specific shape to fix the foaming material, accordingly reduces the die cost, only cuts out the expansion film with a corresponding shape according to the outline structure of the cavity, and has the advantages of simpler structure, strong universality and lower cost.

Drawings

Fig. 1 is a schematic view of an installation structure of a body-in-white cavity sealing structure on a body-in-white according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a body-in-white cavity sealing structure according to an embodiment of the present application.

Fig. 3 is an exploded view of a body-in-white cavity sealing structure according to an embodiment of the present application.

Fig. 4 is a schematic structural view of an inflatable film according to an embodiment of the present application.

Fig. 5 is a schematic cross-sectional view of fig. 4 taken along A-A.

Fig. 6 is a schematic structural view of a board according to an embodiment of the present application.

Fig. 7 is a flow chart of a sealing method according to an embodiment of the application.

Reference numerals illustrate:

100. expanding the film; 110. a sheet material; 111. a through hole; 120. a first foam; 130. a second foam; 140. a paint flow hole;

200. a bracket; 210. a fastener; 220. a sheet metal frame;

300. white body;

400. And welding spots.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The white body refers to a body which is welded but not coated, and a plurality of closed stiffening beam structures such as an A column, a B column, a C column, a threshold, a front wall, a side wall and the like are arranged on the white body, and a plurality of cavities are arranged on the structures, so that when the vehicle runs at a high speed, high-speed air flow movement can be generated in the cavities, and strong noise and vibration are brought to passengers and drivers, and therefore, the cavities are required to be filled and sealed.

In the related art, a specific sealing method is that a foaming material is fixed through a bracket, so that the expansion direction of the foaming material is controlled to fill and seal a cavity, then, for different cavity shapes, different brackets are required to be designed, the universality is poor, different bracket molds are required to be designed, and the cost is high.

Based on the problems of poor universality and high cost of sealing elements in the process of sealing the white car body cavity in the related art, the application provides a white car body cavity sealing structure, a sealing method and a car.

Referring to fig. 1 to 5, fig. 1 is a schematic view showing an installation structure of a body-in-white cavity sealing structure on a body-in-white in an embodiment of the present application, fig. 2 is a schematic view showing a structure of a body-in-white cavity sealing structure in an embodiment of the present application, fig. 3 is a schematic view showing an explosion structure of a body-in-white cavity sealing structure in an embodiment of the present application, fig. 4 is a schematic view showing a structure of an inflatable film in an embodiment of the present application, and fig. 5 is a schematic view showing a cross-sectional structure of the inflatable film in A-A direction; an embodiment of the present application provides a body-in-white cavity sealing structure, which comprises an inflatable film 100 and a bracket 200.

The shape of the expansion film 100 is matched with the shape of the part to be sealed of the cavity of the white body, namely, the expansion film 100 with a specific shape can be obtained in advance by punching, and the expansion film 100 is connected with the white body 300 through the bracket 200; the expansion sheet 100 includes a plate 110, a first foam 120 and a second foam 130 to be foamed; the plate 110 has a first surface and a second surface facing away from each other, the first foam 120 is attached to the first surface, and the second foam 130 is attached to the second surface, that is, the inflatable film 100 is integrally a sandwich structure, and the plate 110 is located between the first foam 120 and the second foam 130; the middle part of the expansion film 100 is provided with a paint flow hole 140, and the paint flow hole 140 has the function that in the process of the white body 300 electrophoretic paint plating, the electrophoretic paint can enter the cavity through the paint flow hole 140 so as to plate the paint on the inner wall surface of the cavity, and after the electrophoresis is finished, the electrophoretic paint in the cavity can flow out of the cavity through the paint flow hole 140 so as to be dried; during the drying process, the first and second foams 120 and 130 are foamed, and the first and second foams 120 and 130 gradually fill the paint flow holes during the foaming expansion process, thereby sealing the cavity.

Specifically, in the body-in-white cavity sealing structure provided by the application, in the process of sealing a cavity, firstly, according to the outline shape of a part to be sealed of the cavity, an expansion film 100 corresponding to the outline shape is punched out, so that the obtained expansion film 100 can just cover the part to be sealed, after being fixed with the body-in-white 300 through a bracket 200, the expansion film 100 is initially arranged at the part to be sealed, after the electrophoretic coating is finished, the body-in-white 300 enters an electrophoretic drying furnace, and the first foam 120 and the second foam 130 are heated and begin to foam and expand, so that the gap in the cavity is gradually filled, and paint flow holes are filled, so that the cavity has a good sealing and sound insulation effect; in this process, the plate 110 corresponds to the skeleton of the expansion film 100, and the plate 110 can maintain the expansion film 100 in a specific shape, ensure the overall strength of the expansion film 100, and also can play a role in restraining and controlling the expansion direction of the first foam 120 and the second foam 130; compared with the sealing mode in the related art, the white body cavity sealing structure does not need to design a bracket with a specific shape to fix the foaming material, accordingly reduces the die cost, only cuts out the expansion film 100 with a corresponding shape according to the outline structure of the cavity, and has the advantages of simpler structure, strong universality and lower cost.

Wherein the paint flow holes 140 may be bar-shaped holes.

Referring to fig. 1 to 3, in some embodiments, the bracket 200 shown in this embodiment includes a fastener 210 and a sheet metal bracket 220; the metal plate frame 220 comprises a first metal plate and a second metal plate, the first metal plate is connected with the second metal plate, the first metal plate extends along a first plane, the second metal plate extends along a second plane, and the first plane and the second plane are arranged at an angle; the first sheet metal is connected to the intumescent film 100 by fasteners 210 and the second sheet metal is used to weld to the body in white 300, with the weld spots 400 being indicated by solid dots in fig. 1.

Specifically, the metal plate frame 220 is in an "L" shape, and an angle between the first metal plate and the second metal plate is determined according to a structure of an actual mounting position, so that the expansion film 100 can be located at a portion to be sealed, and the second metal plate can be attached to the white body 300, thereby improving reliability of fixing the bracket 200.

The fastener 210 may be a rivet, and the first metal plate is connected to the inflatable film 100 through two rivets.

Further, the metal plate frame 220 may be formed by bending one metal plate or welding two metal plates; the junction of first panel beating and second panel beating is provided with the strengthening rib, and the strengthening rib is used for stabilizing first panel beating and second panel beating for the angle between first panel beating and the second panel beating is difficult for taking place to change.

Referring to fig. 5 and 6, fig. 6 is a schematic view showing the structure of a plate according to an embodiment of the present application; in some embodiments, the plate 110 in this embodiment is provided with a plurality of through holes 111, that is, the plate 110 is in a net shape, and the first foam 120 is connected to the second foam 130 through the plurality of through holes 111.

Specifically, in the actual manufacturing process of the inflatable film 100, the first foam 120 and the second foam 130 are attached to two sides of the board 110, and under the action of the extrusion process, the first foam 120 and the second foam 130 can pass through the through holes 111 to be connected with each other, so that an integral structure is formed with the board 110, and the adhesion of the first foam 120 and the second foam 130 on the board is increased by the through holes 111 on the board 110, so that the lightweight design of the inflatable film 100 is facilitated.

Further, as shown in fig. 5 and 6, in some embodiments, the cross-sectional shape of the through hole 111 shown in this embodiment is circular, the diameter of the through hole 111 is 3mm, and the through holes 111 are uniformly distributed in a plurality of rows and columns.

The through-hole 111 is obtained by a punching process, and the cross-sectional shape of the through-hole 111 may be triangular, quadrangular, pentagonal, or the like, and the cross-sectional shape of the through-hole 111 is not limited as long as the punching process can be facilitated.

In some embodiments, the sheet 110 shown in this embodiment may be configured as a galvanized steel sheet having a strength such that the inflation film 100 can be maintained in a particular shape.

In some embodiments, the materials of the first foam 120 and the second foam 130 in this embodiment may be ethylene-vinyl acetate Copolymer (ETHYLENE VINYL ACETATE Copolymer, abbreviated as EVA).

In some embodiments, the thickness of the plate 110 in this embodiment ranges from 0.2mm to 0.4mm, and may specifically be 0.2mm, 0.3mm, or 0.4mm, and 0.3mm may be actually selected.

In some embodiments, the thickness range of the first foam 120 and the thickness range of the second foam 130 shown in this embodiment are each 1.0mm to 2.0mm, and the thickness may be 1.0mm, 1.5mm, or 2.0mm.

In some embodiments, the foaming temperature range of the first foam 120 and the foaming temperature range of the second foam 130 shown in this embodiment are 160 ℃ to 170 ℃, the temperature may be specifically 160 ℃, 165 ℃ or 170 ℃, and 165 ℃ may be actually selected; the volume change rate of the first foam and the volume change rate of the second foam are 800% or more so that the first foam 120 and the second foam 130 after foaming expansion can sufficiently fill the cavity.

Based on the above-mentioned body-in-white cavity sealing structure, as shown in fig. 7, fig. 7 shows a schematic flow chart of a sealing method according to an embodiment of the present application; the application also provides a sealing method which is applied to the white car body cavity sealing structure and comprises the following steps: step 710 and step 720.

And 710, arranging the expansion film 100 at a part to be sealed of the cavity, and forming a gap between the edge of the expansion film 100 and the inner wall surface of the cavity.

In this step, the expansion film 100 is fixed at the portion to be sealed of the cavity by using the bracket 200, and at the same time, a gap is formed between the edge of the expansion film 100 and the inner wall surface of the cavity, so that the electrophoretic paint can flow into the cavity through the gap and the paint flow holes 140 in the process of performing electrophoretic paint plating, and further the electrophoretic paint plating is performed on the inner wall surface of the cavity.

Prior to step 710, further comprising: according to the contour shape of the part to be sealed of the cavity, the expansion film 100 with the consistent contour shape is punched out, and the expansion film 100 can just cover the part to be sealed.

Step 720, after the electrophoretic paint enters the cavity through the gap and the paint flow holes 140, and the inner wall surface of the cavity is subjected to electrophoretic paint plating, drying the white car body for a preset time period at a preset temperature.

In this step, after the electrophoretic paint coating is completed, the electrophoretic paint in the cavity can flow out of the cavity through the gap and the paint flow holes 140, the body-in-white 300 is moved into the electrophoretic drying oven, dried for more than 20 minutes at a temperature ranging from 160 ℃ to 170 ℃, and the first foam 120 and the second foam 130 are heated and fully expanded in the electrophoretic drying oven, so that the gaps in the cavity and the paint flow holes 140 are filled, and thus the effect of sealing the cavity is achieved.

Compared with the sealing method in the related art, the sealing method disclosed by the application has the advantages that a bracket with a specific shape is not required to be designed to fix the foaming material, the die cost is correspondingly reduced, the expansion film with a corresponding shape is punched only according to the outline structure of the cavity, the structure is simpler, the universality is strong, and the cost is lower.

Based on the same inventive concept, the present application also provides a body-in-white 300 comprising the body-in-white cavity sealing structure as described above.

The body in white 300 is sealed by using the body in white cavity sealing structure, in the process of sealing the cavity, firstly, according to the outline shape of the part to be sealed of the cavity, the expansion film 100 corresponding to the outline shape is punched out, the obtained expansion film 100 can just cover the part to be sealed, after being fixed with the body in white 300 through the bracket 200, the expansion film 100 is initially arranged at the part to be sealed, after the electrophoretic paint plating is finished, the body in white 300 enters an electrophoretic drying furnace, the first foam 120 and the second foam 130 are heated and begin to foam and expand, so that the gap in the cavity is gradually filled, paint flowing holes are filled, and a good sealing effect is achieved on the cavity; in this process, the plate 110 corresponds to the skeleton of the expansion film 100, and the plate 110 can maintain the expansion film 100 in a specific shape, ensure the overall strength of the expansion film 100, and also can play a role in restraining and controlling the expansion direction of the first foam 120 and the second foam 130; compared with the sealing mode in the related art, the white body cavity sealing structure does not need to design a bracket with a specific shape to fix the foaming material, accordingly reduces the die cost, only cuts out the expansion film 100 with a corresponding shape according to the outline structure of the cavity, and has the advantages of simpler structure, strong universality and lower cost.

Based on the same inventive concept, the application also provides a vehicle comprising the body-in-white cavity sealing structure.

Because the vehicle adopts the body-in-white cavity sealing structure shown in the above embodiment, the specific structure of the body-in-white cavity sealing structure refers to the above embodiment, and because the vehicle adopts all the technical solutions of all the above embodiments, the vehicle has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be described in detail herein.

The vehicle comprises a passenger vehicle and a commercial vehicle, the white body 300 of the vehicle is sealed through the white body cavity sealing structure, specifically, the expansion film 100 with the corresponding shape is punched according to the outline shape of the cavity on the white body 300, the first foam 120 and the second foam 130 are expanded under the condition of heating, so that the gap, the paint flowing hole 140 and the cavity are filled, and the cavity is sealed. Because the cavity is filled and sealed, the phenomenon of air flow movement of the vehicle during high-speed running is reduced, noise and vibration in the cockpit are reduced, and riding experience of passengers and drivers is improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A body-in-white cavity sealing structure, characterized in that the body-in-white cavity sealing structure comprises:

The shape of the expansion film is matched with the shape of a part to be sealed of the cavity of the white body; the expansion film comprises a plate, a first foaming body and a second foaming body to be foamed; the plate is provided with a first surface and a second surface which are opposite, the first foam body is attached to the first surface, and the second foam body is attached to the second surface;

The middle part of the expansion film is provided with a paint flowing hole, and the first foam body and the second foam body are used for filling the paint flowing hole under the condition that the first foam body and the second foam body are foamed; and

And the expansion film is used for being connected with the white body through the bracket.

2. The body-in-white cavity seal structure according to claim 1, wherein,

The bracket comprises a fastener and a sheet metal bracket body;

The metal plate frame body comprises a first metal plate and a second metal plate, the first metal plate is connected with the second metal plate, the first metal plate extends along a first plane, the second metal plate extends along a second plane, and the first plane and the second plane are arranged at an angle; the first metal plate is connected with the expansion film through the fastener, and the second metal plate is used for welding with the white car body.

3. The body-in-white cavity seal structure according to claim 1, wherein,

The plate is provided with a plurality of through holes, and the first foam body is connected with the second foam body through a plurality of through holes.

4. The body-in-white cavity seal structure according to claim 1, wherein,

The sheet material is configured as a galvanized steel sheet.

5. The body-in-white cavity seal structure according to claim 1, wherein,

The materials of the first foam and the second foam are ethylene-vinyl acetate copolymer.

6. The body-in-white cavity seal structure according to claim 1, wherein,

The thickness of the plate ranges from 0.2mm to 0.4mm.

7. The body-in-white cavity seal structure according to claim 1, wherein,

The thickness range of the first foam and the thickness range of the second foam are both 1.0mm to 2.0mm.

8. The body-in-white cavity seal structure according to claim 1, wherein,

The foaming temperature range of the first foaming body and the foaming temperature range of the second foaming body are 160-170 ℃, and the volume change rate of the first foaming body and the volume change rate of the second foaming body are more than or equal to 800%.

9. A sealing method applied to the body-in-white cavity sealing structure according to any one of claims 1 to 8, comprising:

Arranging an expansion rubber sheet at a part to be sealed of a cavity of a white automobile body, and forming a gap between the edge of the expansion rubber sheet and the inner wall surface of the cavity;

and after the electrophoretic paint enters the cavity through the gap and the paint flow hole and the inner wall surface of the cavity is subjected to electrophoretic paint plating, drying the white automobile body for a preset time at a preset temperature.

10. A vehicle comprising a body-in-white cavity sealing structure as claimed in any one of claims 1 to 8.