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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AI-Extracted 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 pr...
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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.

Application Domain

Technology Topic

EngineeringSoft layer +5

Image

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

Examples

  • Experimental program(3)

Example Embodiment

[0021] Example 1
[0022] (1) Paving materials: such as figure 1 As shown, the paving materials are stacked in the order of the soft layer fiber felt 1, the air-permeable sound-absorbing film 2, and the hard layer fiber felt 3 from bottom to top. The breathable sound-absorbing film is a PE breathable sound-absorbing film.
[0023] The composition of the soft layer fiber felt is 20% by mass polyester fiber, 20% low-melting polyester fiber, 60% cotton fiber and chemical synthetic fiber regenerated fiber; surface density: 500g/m 2.
[0024] The composition of the hard layer fiber felt is 10% polyester fiber, 30% low-melting polyester fiber, 60% cotton fiber and chemical synthetic fiber regenerated fiber; surface density: 500g/m 2.
[0025] (2) Compression molding: Put the laid material into the molding mold for compression molding, the upper mold is evacuated to form an air bag in the product part, and high temperature steam is introduced to heat the material to obtain a semi-finished product; molding conditions: steam pressure : 0.6Mpa; steam temperature: 170℃; molding pressure: 5Mpa; molding time: 40s; vacuum pressure: 0.015Mpa; vacuum time: 10s after molding;
[0026] Such as figure 2 As shown, the product includes a hard layer fiber felt 1, a breathable sound-absorbing film 2, a soft layer fiber felt 3, and an airbag 4.
[0027] (3) Cooling and shaping: Put the pressed semi-finished product into a cooling jig, and perform cooling and shaping at room temperature. Cooling time: 30s;
[0028] (4) Cutting: Use a punching device or water jet to cut the dimensions and hole positions to obtain the product automotive sound insulation pad; punching device: punching pressure: 5Mpa, punching time: 3s; waterjet: cutting pressure: 40000psi, Cutting air pressure: 0.6Mpa;
[0029] (5) Inspection: After passing the inspection without defects, it shall be packed and put into storage.

Example Embodiment

[0030] Example 2
[0031] (1) Paving: stack the paving in the order from bottom to top soft layer fiber felt, breathable sound-absorbing film and hard layer fiber felt;
[0032] (2) Compression molding: Put the laid material into the molding mold for compression molding, the upper mold is evacuated to form an air bag in the product part, and high temperature steam is introduced to heat the material to obtain a semi-finished product; molding conditions: steam pressure : 3Mpa; steam temperature: 220℃; molding pressure: 10Mpa; molding time: 60s; vacuum pressure: 0.03Mpa; vacuum time: 20s after molding;
[0033] (3) Cooling and shaping: put the pressed semi-finished product into a cooling jig, and perform cooling and shaping at room temperature. Cooling time: 55s;
[0034] (4) Cutting: Use a punching device or water jet to cut the dimensions and hole positions to obtain the product car sound insulation pad; punching device: punching pressure: 10Mpa, punching time: 10s; waterjet: cutting pressure: 50000psi, Cutting air pressure: 0.8Mpa;
[0035] (5) Inspection: After passing the inspection without defects, it shall be packed and put into storage.

Example Embodiment

[0036] Example 3
[0037] (1) Paving: stack the paving in the order from bottom to top soft layer fiber felt, breathable sound-absorbing film and hard layer fiber felt;
[0038] (2) Compression molding: Put the laid material into the molding mold for compression molding, the upper mold is evacuated to form an air bag in the product part, and high temperature steam is introduced to heat the material to obtain a semi-finished product; molding conditions: steam pressure : 2Mpa; steam temperature: 200℃; molding pressure: 7Mpa; molding time: 50s; vacuum pressure: 0.02Mpa; vacuum time: 15s after molding;
[0039] (3) Cooling and shaping: Put the pressed semi-finished product into a cooling jig, and cool and shape it at room temperature. Cooling time: 40s;
[0040] (4) Cutting: Use a punching device or water jet to cut the shape and hole position, punching device: punching pressure: 7Mpa, punching time: 5sec;
[0041] (5) Inspection: After passing the inspection without defects, it shall be packed and put into storage.
[0042] The raw materials used in the present invention are all purchased from the market, and the equipment used is all existing equipment.
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PUM

PropertyMeasurementUnit
Surface density500.0 ~ 2000.0g/m²
Surface density500.0g/m²
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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