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Automobile sound-insulating pad and manufacturing technique thereof

A technology of automobile sound insulation mat and manufacturing process, which is applied in vehicle parts, transportation and packaging, etc., can solve the problems of fiber felt with strong smell, fiber felt exposed, easy to pollute the environment, etc., to improve the sound absorption coefficient of low-frequency waves, and the sound absorption effect is good , light weight effect

Active Publication Date: 2013-09-18
WUXI GISSING AUTO PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing fiber felt sound insulation pad reinforcement methods mainly have the following problems: 1. The fiber felt reinforced with phenolic resin has a strong smell and is easy to pollute the environment; 2. The fiber felt is exposed, which is likely to cause unqualified volatile organic compounds (VOC), and the smell cannot meet the requirements. OEM Technical Requirements

Method used

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  • Automobile sound-insulating pad and manufacturing technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment one: a kind of manufacturing process of automobile sound insulation pad, comprises following process step:

[0027] (1) Preparation of low-melting point fiber layer: Send low-melting point PET fiber from cotton feeder to carding machine for carding to form low-melting point fiber web; transport the low-melting point fiber web to cotton laying machine to form low-melting point fiber Among them, the speed of the cotton feeding machine is 20Hz, the speed of the carding machine doffer is 350 rpm, and the reciprocating frequency of the cotton laying machine is 4Hz; The speed is 200 rpm; the density of the low melting point fiber layer is 100g / m 2 ;

[0028] (2) Preparation of mixed fiber felt: Mix regenerated fiber, polyester fiber and low-melting point PET fiber evenly in a weight ratio of 40:20:20 to obtain mixed fiber; send the mixed fiber from the cotton feeder to the carding machine for carding to form Mixed fiber web; the mixed fiber web is transported to ...

Embodiment 2

[0033] Embodiment two: a kind of manufacturing process of automobile sound insulation pad, comprises following process step:

[0034] (1) Preparation of low-melting point fiber layer: Send low-melting point PET fiber from cotton feeder to carding machine for carding to form low-melting point fiber web; transport the low-melting point fiber web to cotton laying machine to form low-melting point fiber Among them, the speed of the cotton feeding machine is 30Hz, the speed of the carding machine doffer is 450 rpm, and the reciprocating frequency of the cotton laying machine is 10Hz; The speed is 300 rpm; the density of the low melting point fiber layer is 250g / m 2 ;

[0035] (2) Preparation of mixed fiber felt: Mix regenerated fiber, polyester fiber and low-melting point PET fiber evenly in a weight ratio of 60:30:30 to obtain mixed fiber; send the mixed fiber from the cotton feeder to the carding machine for carding to form Mixed fiber web; the mixed fiber web is transported to...

Embodiment 3

[0040] Embodiment three: a kind of manufacturing process of automobile sound insulation pad, comprises following process step:

[0041] (1) Preparation of low-melting point fiber layer: Send low-melting point PET fiber from cotton feeder to carding machine for carding to form low-melting point fiber web; transport the low-melting point fiber web to cotton laying machine to form low-melting point fiber layer; wherein, the speed of the cotton feeding machine is 25Hz, the speed of the carding machine doffer is 400 rpm, and the reciprocating frequency of the cotton laying machine is 5Hz; The speed is 250 rpm; the density of the low melting point fiber layer is 200g / m 2 ;

[0042] (2) Preparation of mixed fiber felt: Mix regenerated fiber, polyester fiber and low melting point PET fiber evenly in a weight ratio of 50:25:25 to obtain mixed fiber; send the mixed fiber from the cotton feeder to the carding machine for carding to form Mixed fiber web; the mixed fiber web is transport...

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Abstract

The invention relates to an automobile sound-insulating pad and a manufacturing technique thereof. The manufacturing technique is characterized by comprising the following processing steps: (1) low-melting-point PET (Polyethylene Terephthalate) fibers are carded by a carding machine, spread and stacked by a cotton spreading machine and strengthened by needle punching to form low-melting-point fiber layers; (2) after being mixed, regenerated fibers, polyester fibers and low-melting-point PET fibers are carded by the carding machine, spread and stacked by the cotton spreading machine and strengthened by needle punching to form a composite fiber felt; (3) one low-melting-point fiber layer, the composite fiber felt and the other low-melting-point fiber layer are strengthened by needle punching in sequence from the bottom up to form a semi-finished automobile sound-insulating pad; (4) the semi-finished automobile sound-insulating pad is placed in a forming die, and is subjected to compression molding by injecting steam into the forming die; (5) cooling is performed; (6) the semi-finished automobile sound-insulating pad is cut to reach a required overall size, and required holes are punched in the semi-finished automobile sound-insulating pad, thus obtaining the finished automobile sound-insulating pad. According to the invention, the sound absorption performance of the automobile sound-insulating pad is improved, the emission of odor and volatile organic compounds (VOC) is reduced, and materials are saved.

Description

technical field [0001] The invention relates to an automobile sound-insulating mat and a manufacturing process thereof, in particular to an automobile sound-insulating mat produced by using low-melting-point fibers and mixed fiber mats, and belongs to the technical field of automobile interior decorations. Background technique [0002] Car sound insulation pads can be applied to various parts such as car engine compartments, passenger compartments, and trunks. They have the characteristics of shock absorption, sound absorption, and heat insulation. The interior, like the appearance of the car, has become an important factor for people to choose a car, so the requirements for the interior parts of the car are getting higher and higher. At present, car sound insulation pads are mainly made of recycled fiber felt and PU foam. The existing fiber felt sound insulation pad reinforcement methods mainly have the following problems: 1. The fiber felt reinforced with phenolic resin h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R13/08
Inventor 张玮长
Owner WUXI GISSING AUTO PARTS CO LTD
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