Sound insulation gasket for car body cavity

Abstract

The invention discloses a sound insulation gasket for a car body cavity. First expansion rubbers (2) with the same thickness are adhered onto the peripheral lateral wall of a supporting framework (1), second expansion rubbers (3) with the same thickness are adhered onto the front plane and the rear plane of the supporting framework (1), a through hole (1a) penetrating through the front plane and the rear plane is formed in the supporting framework (1), and a third expansion rubber (4) is filled in the through hole (1a). The peripheries of the second expansion rubbers (3) are connected with the first expansion rubbers (2), the third expansion rubber (4) enables the second expansion rubbers (3) on the front plane and the rear plane to be connected, and accordingly, the first expansion rubbers (2), the second expansion rubbers (3) and the third expansion rubber (4) are connected into a whole. Due to the fact that the expansion rubbers are adhered onto all the outer surface of the whole supporting framework, the contact area between the supporting framework and the expansion rubbers is enlarged, falling or poor forming during electrophoresis is avoided, and block effect on air flow in the car body cavity can be better.

Description

technical field [0001] The invention relates to auto parts, in particular to a sound-insulating gasket used for filling the cavity in the vehicle to block and block the high-speed flow of air in the cavity of the vehicle body when the vehicle is running at high speed. Background technique [0002] The body cavity sound insulation gasket is used to be installed between the metal plates or in the cavity formed by the metal plate and the support beam. The generated noise plays the role of sound insulation and sealing. The shape of the soundproof gasket is roughly the same as that of the cavity in the body. [0003] Such as figure 1 , figure 2 As shown, the body cavity sound insulation gasket includes two parts, the support frame 1 and the expansion glue 5 . The supporting frame 1 includes a front plane, a rear plane and a circumferential side wall, and a buckle 1b is arranged on the supporting frame 1 . A layer of expansion glue 5 with equal thickness is adhered on the ci...

AI Technical Summary

Problems solved by technology

In the actual production process, it was found that the expansion rubber on the circumferential side wall of the support frame 1 often fell off or was not well formed. The main reason was that when the body went through the electrophoresis process, the electrophoretic fluid washed inside the body to form a certain impact However, the contact area between the expansion gel 5 and the outline of the support frame 1 is too small, resulting in the expansion gel 5 falling off or poorly formed after the electrophoresis process is completed.

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