CN205202896U - Sealed expansion glue piece of using of car cavity - Google Patents

Abstract

The utility model relates to an auto part, a sealed expansion glue piece of using of car cavity in an in particular to car NVH field. Including metal sheet, foam sheet, metal sheet one end is the metal clip, and the other end is the face, is equipped with two metal buckles on the metal sheet face, foam sheet is irregularly shaped, is equipped with two fixed orificess and an electrophoresis hole on foam sheet's face, foam sheet fixes on the metal sheet face through the cooperation of two metal buckles of two fixed orificess and metal sheet. The advantage is: can be used to the packing of the great cavity of car body, preparation simple process, assembling process are simple, simple to operate, the location is accurate, the effect that gives sound insulation is obvious, the expanded material materials are few, and the cost of manufacture is low, use safe and reliable.

Description

A kind of expansion film for automobile cavity sealing

technical field

The utility model relates to an automobile accessory, in particular to an intumescent film used for sealing an automobile cavity in the field of automobile NVH.

Background technique

In recent years, expandable materials for sound insulation and vibration reduction have played an increasingly important role in the field of automotive NVH. For example, when a car is running at high speed, the bypass cavity of the body will generate high-speed airflow during high-speed driving, which will give passengers and The driver brings strong noise and vibration. To solve this problem, various foam materials have been widely used to fill the bypass cavity. At present, vinyl (such as EVA) foaming materials are widely used, which have the advantages of light weight, good adhesion, and good sound absorption effect. This kind of material is assembled in the cavity of the vehicle body, and after expansion, it fills the cavity of the vehicle body to achieve the purpose of sound insulation and vibration reduction. But for the larger cavity of the car body, if it is completely filled, the amount of material required is large and the cost is high, so a new method must be found to fix this type of material.

Contents of the invention

In view of the existing conditions in the prior art, the utility model provides an intumescent film for sealing an automobile cavity, which is used for filling a relatively large cavity of an automobile body, which greatly saves the amount of foaming material and greatly reduces the cost.

In order to achieve the above object, the utility model adopts the following technical solution: an expansion film for sealing the cavity of an automobile, which is characterized in that it includes a metal plate and a foam sheet, one end of the metal plate is a metal clip, and the other end is a The surface of the metal plate is provided with two metal buckles; the surface of the foam sheet is provided with two fixing holes and an electrophoresis hole; the foam sheet is connected with the metal plate through the two fixing holes. The cooperation of two metal buckles is fixed on the surface of the metal plate.

The utility model has the advantages that it can be used for filling larger cavities in automobile bodies, has simple manufacturing process, simple assembly process, convenient installation, accurate positioning, obvious sound insulation effect, less foam material, low production cost, and safe and reliable use process. .

Description of drawings

Fig. 1 is a side view of the utility model;

Fig. 2 is a front view of the foam sheet of the present invention.

detailed description

Below in conjunction with accompanying drawing, the structure of the present utility model is further described.

As shown in Figures 1 and 2, an intumescent film for sealing an automobile cavity includes a metal plate 1 and a foam sheet 2.

One end of the metal plate 1 is a metal clip 1-1, and the other end is a plate surface, and two metal buckles 1-2 are arranged on the plate surface of the metal plate 1.

The foam sheet 2 has an irregular shape, and two fixing holes 2-1 and one electrophoresis hole 2-2 are arranged on the surface of the foam sheet 2.

The foam sheet 2 is fixed on the surface of the metal plate 1 through the cooperation of the two fixing holes 2-1 and the two metal buckles 1-2 of the metal plate 1 .

The foamed sheet 2 is a high-temperature expandable material mixed with ethylene polymer or copolymer with foaming agent, crosslinking agent, filler, etc. It can be formed into a sheet by molding, extrusion, etc. during processing, and then Cut to desired shape.

During use, the metal clip 1-1 of the metal plate 1 is clamped on the sheet metal in the cavity of the automobile body, and because the metal clip 1-1 is elastic, it is firmly fixed and will not fall off. After high-temperature baking in the subsequent process, the foam sheet 2 expands and foams to fully fill a certain cross-section of the cavity of the vehicle body to block the flow of high-speed airflow, thereby achieving the purpose of sound insulation and noise reduction.

Claims (1)

1. an automobile cavity sealing expansion film, it is characterized in that: comprise metal sheet (1), foam sheet (2), described metal sheet (1) one end is metal clip (1-1), and the other end is plate face, and metal sheet (1) plate face is provided with two metal buckles (1-2); The face of described foam sheet (2) is provided with two fixed orifices (2-1) and an electrophoresis hole (2-2); Foam sheet (2) is fixed on metal sheet (1) plate face by coordinating of two fixed orifices (2-1) and metal sheet (1) two metal buckle (1-2).