A kind of environmental protection lightweight soundproof pad and production method thereof

Abstract

The invention discloses an environment-friendly light sound insulation pad which is of a three-layer structure comprising a sound absorbing layer, a sound insulation layer and an elastic layer in sequence from top to bottom. The elastic layer makes contact with a car body metal plate. The invention further discloses a production method of the environment-friendly light sound insulation pad. The production method comprises the steps that the sound insulation layer is cut, and arc discharge processing is carried out on the sound insulation layer; the sound absorbing layer is heated; a semi-finished blanket is placed on a lower die of a sucking, foaming and punching integrated die to be positioned; the sound insulation layer is heated in a radiation mode; the sound insulation layer is sucked to the semi-finished blanket placed on the lower die of the sucking, foaming and punching integrated die; the surface skin of the sound insulation layer is heated and molten, an upper die and the lower die are closed, isocyanate and premixed polyether polyols are poured to the sound insulation layer, and the sound insulation layer forms the elastic layer; after die opening, the product is taken out. By the adoption of the structure, the weight of a single environment-friendly light sound insulation pad is reduced, the whole sound insulation level of the single environment-friendly light sound insulation pad is improved, the noise in the whole car is lowered, the product hole site precision is high, and the environment-friendly light sound insulation pad has the advantages of being low in odor intensity, low in VOC discharge and the like.

Description

technical field [0001] The present invention relates to the field of auto parts manufacturing, more specifically to an environment-friendly lightweight sound-insulating pad, and also relates to a production method of an environment-friendly lightweight sound-insulating pad, which is suitable for the production and manufacture of sound-insulating pads for automobile cowl baffles and belongs to automobile Parts manufacturing field. Background technique [0002] The sound insulation pad in the front panel area plays an important role in the noise performance in the passenger compartment of the vehicle. At the same time, as the fuel consumption and emission standards of automobiles and the air quality standards in the car become increasingly strict, lightweight, low odor, and low VOC emissions are also required. Considered goals. [0003] In order to achieve the target noise inside the vehicle, the front panel area generally uses a heavy layer sound insulation pad, and the soun...

AI Technical Summary

Problems solved by technology

Polyvinyl acetate (EVA) skin layer has a typical acetic acid smell, which in the car can lead to an unfriendly odor in the passenger compartment

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