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Manufacturing method of automobile sound insulation pad

A technology of automobile sound insulation pad and manufacturing method, which is applied in the directions of chemical instruments and methods, lamination and layered products, etc., can solve the problems of complicated adjustment of acoustic performance, complicated production process, increase of production cost, etc., so as to ensure safety and save money. The effect of labor and productivity improvement

Active Publication Date: 2012-05-02
广州吉兴汽车内饰件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of process mainly has the following problems: 1. The raw material shrinks seriously after drying; 2. The production process is complicated, which also greatly increases the production cost; 3. The problem of complex acoustic performance adjustment

Method used

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  • Manufacturing method of automobile sound insulation pad
  • Manufacturing method of automobile sound insulation pad
  • Manufacturing method of automobile sound insulation pad

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Paving: such as figure 1 As shown, the pavements are stacked in the order of soft fiber mat 1, air-permeable sound-absorbing membrane 2 and hard layer fiber mat 3 from bottom to top. The air-permeable and sound-absorbing film is PE air-permeable and sound-absorbing film.

[0023] The composition of the soft layer fiber felt is 20% polyester fiber by mass fraction, 20% low melting point polyester fiber and 60% cotton fiber and regenerated fiber of chemical synthetic fiber; surface density: 500g / m 2 .

[0024] The hard layer fiber mat composition is 10% polyester fiber, 30% low melting point polyester fiber and 60% cotton fiber and regenerated fiber of chemical synthetic fiber; surface density: 500g / m 2 .

[0025] (2) Compression molding: Put the paved material into the forming mold for compression molding, the upper mold is vacuumed, and an air bag is formed in the product part, and at the same time, high-temperature steam is introduced to heat and shape the mater...

Embodiment 2

[0031] (1) Paving: stack the paving in the order of soft fiber mat, breathable sound-absorbing membrane and hard fiber mat from bottom to top;

[0032] (2) Compression molding: Put the paved material into the forming mold for compression molding, the upper mold is vacuumed, and an air bag is formed in the product part, and at the same time, high-temperature steam is introduced to heat and shape the material to obtain a semi-finished product; molding conditions: steam pressure : 3Mpa; Steam temperature: 220℃; Forming pressure: 10Mpa; Forming time: 60s; Vacuuming pressure: 0.03Mpa; Vacuuming time: 20s after forming;

[0033] (3) Cooling and shaping: put the pressed semi-finished product into the cooling fixture, and carry out cooling and shaping at room temperature, cooling time: 55s;

[0034] (4) Cutting: Use a punching device or a water jet to cut the dimensions and hole positions to obtain the product car sound insulation mat; punching device: punching pressure: 10Mpa, punchi...

Embodiment 3

[0037] (1) Paving: stack the paving in the order of soft fiber mat, breathable sound-absorbing membrane and hard fiber mat from bottom to top;

[0038] (2) Compression molding: Put the paved material into the molding mold for compression molding, vacuumize the upper mold, form air pockets in the product part, and at the same time inject high-temperature steam to heat and shape the material to obtain a semi-finished product; molding conditions: steam pressure : 2Mpa; Steam temperature: 200℃; Forming pressure: 7Mpa; Forming time: 50s; Vacuuming pressure: 0.02Mpa; Vacuuming time: 15s after forming;

[0039] (3) Cooling and shaping: put the pressed semi-finished product into the cooling fixture, and cool and shape it at room temperature. Cooling time: 40s;

[0040] (4) Cutting: use a punching device or a water jet to cut the overall size and hole position, punching device: punching pressure: 7Mpa, punching time: 5sec;

[0041] (5) Inspection: After passing the inspection without ...

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Abstract

The invention relates to a manufacturing method of an automobile sound insulation pad. The method relates to a technology for producing a sound insulation pad used for reducing the automobile noise. The invention belongs to the technical field of automobile part sound insulation and noise reduction. According to the invention, a soft layer fiber felt, a PE air-permeating sound-absorbing membrane and a hard layer fiber felt are piled and aligned; the materials are delivered into a molding die; with a heat transferring method by using high-temperature steam with a high penetrating force, compression molding is carried out; profile dimensions and hole locations of the obtained pad are obtained by cutting; when the pad is examined and proved to be qualified, the finished product, which is the automobile sound insulation pad, can be obtained. According to the invention, the bonding between the soft and hard layer fiber felts is carried out with the high-temperature steam heat transferring method, such that bonding is carried out during compression molding, but not by on-site artificial adhesive coating. Therefore, human labor can be saved, productivity can be improved, production efficiency can be greatly improved, production site environment safety can be ensured, and the health of operators can be ensured. According to the invention, the air resistance of the sound insulation pad is adjusted by using the PE air-permeating sound-absorbing membrane. With the composition of the soft layer fiber felt, the PE air-permeating sound-absorbing membrane, and the hard layer fiber felt with different densities, an automobile sound insulation pad with a better acoustic performance can be obtained.

Description

technical field [0001] The invention relates to a manufacturing method of an automobile sound insulation pad, which is a process for producing a sound insulation pad for reducing automobile noise, and belongs to the technical field of sound insulation and noise reduction of automobile parts. Background technique [0002] Car sound insulation mat products are generally installed inside the car to play the role of sound insulation and noise reduction. The adjustment of acoustic performance (through sound insulation and sound absorption rate) is very complicated by adjusting the acoustic performance (through sound insulation and sound absorption rate) of each layer of fiber structure. The production process flow of the existing fiber sound insulation mat products is to first send the hard-layer fiber felt (HL for short) into the oven to heat and dry it to soften it, and then send the softened hard-layer fiber felt into the mold for compression molding. Manually coat the adhes...

Claims

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Application Information

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IPC IPC(8): B32B27/12B32B27/32B32B37/06B32B37/10B32B38/04
Inventor 陈全生陈奇贺一辉曾凌云
Owner 广州吉兴汽车内饰件有限公司
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