Injection molded automotive sound insulation pad and manufacturing method thereof

An automotive sound insulation pad and injection molding technology, which is applied in vehicle parts, transportation and packaging, etc., can solve the problems of low effective utilization, unfavorable lightweight, energy saving and emission reduction requirements, and large material consumption, and achieves dimensional accuracy and consistency. Improved performance, significant weight reduction and energy saving, and reduced waste in corners

Active Publication Date: 2015-11-11
SHANGHAI HUAGU VEHICLE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in order to meet the sound absorption and insulation requirements of the sound insulation pad, the front wall sound insulation pad for automobiles generally adopts a double-layer structure of heavy layer skin and PU foam. The dosage is large, the effective utilization rate is low, and the thickness of each area of ​​the skin layer after blister forming cannot be accurately controlled. The acoustic requirements of the same standard require more skin dosage, which is not conducive to automobile lightweight and energy saving and emission reduction needs. New applications are required. Advanced technology, so that the heavy layer skin is distributed according to the thickness area required by the design, so as to achieve the goal of weight reduction and energy saving

Method used

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  • Injection molded automotive sound insulation pad and manufacturing method thereof
  • Injection molded automotive sound insulation pad and manufacturing method thereof
  • Injection molded automotive sound insulation pad and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] An injection-molded sound-insulating pad for automobiles comprises a double-layer structure of a heavy-layer skin and a PU foam layer.

[0051] The production method is as follows: put the elastomer particles with a density of 1.8kg / m3 in an oven, and dry them at 80°C for 2 hours; put the elastomer particles into the injection molding machine for injection molding, and the injection mold adopts needle valve type Hot runner structure, the main process parameters of injection molding are set as follows: the temperature of the injection mold is 70°C, the temperature of the hot runner is 255°C, the temperature of each injection section is 240~255°C, the injection pressure is 45Mpa, and the injection molding time is 55 seconds. Prepare the shaped skin; take out the shaped skin and put it into the shaping tool for cooling and shaping, the setting time is 2 minutes; put the shaped shaped skin on the flame treatment bracket, and use the flame treatment system for surface treatme...

Embodiment 2

[0053] An injection molded sound insulation pad for automobiles comprises a three-layer structure of a light PET felt layer, a heavy layer of skin and a PU foam layer.

[0054] The production method is as follows: put the elastomer particles with a density of 1.5kg / m3 in an oven, and dry them at 80°C for 2 hours; put the elastomer particles into the injection molding machine for injection molding, and the injection mold adopts needle valve type Hot runner structure, the main process parameters of injection molding are set as follows: the temperature of the injection mold is 70°C, the temperature of the hot runner is 250°C, the temperature of each injection section is 240~250°C, the injection pressure is 43Mpa, and the injection molding time is 50 seconds. Prepare the shaped skin; take out the shaped skin and put it into the shaping tool for cooling and shaping, the setting time is 2 minutes; put the shaped shaped skin on the flame treatment bracket, and use the flame treatment ...

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Abstract

The invention relates to the technical field of an automotive sound insulation pad, and particularly to an injection molded automotive sound insulation pad and a manufacturing method thereof. The injection molded automotive sound insulation pad is characterized in that the sound insulation pad is provided with heavy layers with different densities; the central portion of the sound insulation pad is provided with a hole; the left side of the hole is provided with a first heavy layer with a density of 5.4kg / m<2>; a second heavy layer with a density of 6.3kg / m<2> is arranged at the right side and below the hole; the portion above the hole, the portion below the heavy layer and the right side below the second heavy layer are respectively provided with a third heavy layer with a density of 4.5kg / m<2>; a fourth heavy layer with a density of 3.6kg / m<2> is arranged below the second heavy layer; and a fifth heavy layer with a density of 2.7kg / m<2> is arranged outside the first heavy layer, the second heavy layer, the third heavy layer and the fourth heavy layer. Compared with a prior plastic uptake process, the process according to the injection molded automotive sound insulation pad is advantageous in that the number of leftover materials is reduced; and the dimension accuracy and consistency of the component are improved.

Description

technical field [0001] The invention relates to the technical field of automobile sound insulation pads, in particular to an injection molding automobile sound insulation pad and a manufacturing method thereof. Background technique [0002] At present, in order to meet the sound absorption and insulation requirements of the sound insulation pad, the front wall sound insulation pad for automobiles generally adopts a double-layer structure of heavy layer skin and PU foam. The dosage is large, the effective utilization rate is low, and the thickness of each area of ​​the skin layer after blister forming cannot be accurately controlled. The acoustic requirements of the same standard require more skin dosage, which is not conducive to automobile lightweight and energy saving and emission reduction needs. New applications are required. The advanced technology makes the skin of the heavy layer distributed according to the thickness area required by the design, so as to achieve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R13/08B29C69/02B29B9/06B29B13/06B29C45/27B29C45/77B29C45/78B29C71/02C08L23/06C08L23/12C08L23/08C08L53/02C08L91/06C08K13/02C08K3/04C08K3/34C08K3/26C08K3/30C08J3/22
CPCB60R13/08
Inventor 王拥宪陈阳闻建煊钱时杰
Owner SHANGHAI HUAGU VEHICLE IND CO LTD
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