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

A lightweight, sound-insulating pad technology, applied in the field of auto parts manufacturing, can solve the problem of unfriendly passenger compartment odor, and achieve the effect of weight reduction, low VOC emission, and easy combination

Active Publication Date: 2016-08-24
湖北三环汽车工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] An environmentally friendly lightweight sound insulation pad will be realized through the following process.

[0032] Step 1. Preparation of raw materials: According to the consumption quota requirements of the product, the sound insulation layer 2 is cut into raw material sheets of predetermined size. The sound insulation layer breaks the polymer chains on the surface through arc discharge, thereby increasing the surface tension, improving the adhesion with PU foam, and preventing delamination. The discharge current is 1.5A, and the surface tension reaches 36 dynes.

[0033] Step 2. The sound-absorbing layer 1 is sent into the hot blast stove by the automatic feeding mechanism for heating. Hot air temperature: 210°C, the wind speed of hot air injection is 6m / s. The distance between the air outlet and the heating surface: 10mm, and the heating time is 15s.

[0034]Step 3. The heated sound-absorbing layer 1 is transferred to a hot-press punching die for pressing and f...

Embodiment 2

[0046] An environmentally friendly lightweight sound insulation pad will be realized through the following process.

[0047] Step 1. Preparation of raw materials: According to the consumption quota requirements of the product, the sound insulation layer 2 is cut into raw material sheets of predetermined size. The sound insulation layer breaks the polymer chains on the surface through arc discharge, thereby increasing the surface tension, improving the adhesion with PU foam, and preventing delamination. The discharge current is 2.5A, and the surface tension reaches 38 dynes.

[0048] Step 2. The sound-absorbing layer 1 is sent into the hot blast stove by the automatic feeding mechanism for heating. Hot air temperature: 240°C, hot air jet speed is 15m / s. The distance between the air outlet and the heating surface: 20mm, and the heating time is 20s.

[0049] Step 3. The heated sound-absorbing layer 1 is transferred to a hot-press punching die for pressing and forming, and the ...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R13/08
CPCB60R13/0815
Inventor 张志龙龙踏青田光胜司旭仓吴凌波丁贝
Owner 湖北三环汽车工程塑料有限公司
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