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Production technology of soft and hard layer sound insulating pad of automobile

A production process, soft and hard layer technology, applied in the field of automobile soft and hard layer sound insulation pad production technology, can solve the problems of soft and hard layer adhesion, fast heat dissipation of the film, low production efficiency, etc., and achieve strong water vapor penetration , Reduce the production process and improve the production efficiency

Active Publication Date: 2014-03-19
WUXI GISSING AUTO ACOUSTIC PARTS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the material composition of soft and hard fiber mats, the traditional process often adopts the method of first drying and then cold pressing to produce sound insulation mats, which has a series of disadvantages: many steps, long drying time and cold pressing time, and low production efficiency; The thickness of the layered fiber mat changes greatly during the drying process, which affects the sound insulation performance of the product; the baked fiber mat is easily deformed during transportation to the cold mold; the heat dissipation during the film laying process is too fast, resulting in the film not being completely melted, soft, The hard layer is not firmly pasted, it is easy to take off
These shortcomings seriously affect the performance of automobile soft and hard layer sound insulation pads, and hinder the development of automobile sound insulation pads. Therefore, it is of great significance to study the new production process of automobile soft and hard layer sound insulation pads.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1 A production process of an automobile soft and hard layer sound insulation pad

[0014] (1) Laying of raw materials: Lay materials on the laying table in the order of soft layer fiber mat, film and hard layer fiber mat.

[0015] The density of described soft layer fiber mat is 600g / m 2 , containing 10% low melting point fiber, 70% cotton fiber and 20% chemical fiber.

[0016] Described film is polyethylene perforated film, and density is 20g / m 2 .

[0017] The density of the hard layer fiber felt is 1000g / m 2 , containing 15% low melting point fiber, 60% cotton fiber and 25% chemical fiber.

[0018] (2) Hot pressing molding: Put the laid material into the forming mold, and then pressurize the water vapor, the ventilation time is 2s, the water vapor pressure is 0.5MPa, the water vapor intake time is 6s, and the water vapor exit time 15s; after the ventilation is completed, transfer to a hot-pressing mold, and pressurize to form a semi-finished product; the...

Embodiment 2

[0021] Example 2 A production process of an automobile soft and hard layer sound insulation pad

[0022] (1) Laying of raw materials: Lay materials on the laying table in the order of soft layer fiber mat, film and hard layer fiber mat.

[0023] The density of the soft layer fiber felt is 1000g / m 2 , containing 20% ​​low melting point fiber, 70% cotton fiber and 10% chemical fiber.

[0024] Described film is polyethylene perforated film, and density is 40g / m 2 .

[0025] Described hard layer fiber mat density is 1600g / m 2 , containing 25% low melting point fiber, 60% cotton fiber and 15% chemical fiber.

[0026] (2) Hot pressing molding: Send the laid material into the forming mold, and then pressurize the water vapor, the ventilation time is 10s, the water vapor pressure is 1.0MPa, the water vapor intake time is 12s, and the water vapor exit time After the ventilation is completed, transfer to a hot-pressing mold and pressurize to form a semi-finished product; the heatin...

Embodiment 3

[0029] Example 3 Production process of a car soft and hard layer sound insulation pad

[0030] (1) Laying of raw materials: Lay materials on the laying table in the order of soft layer fiber mat, film and hard layer fiber mat.

[0031] The density of described soft layer fiber mat is 800g / m 2 , containing 15% low melting point fiber, 70% cotton fiber and 15% chemical fiber.

[0032] Described film is polyethylene perforated film, and density is 30g / m 2 .

[0033] The density of the hard layer fiber felt is 1300g / m 2 , containing 20% ​​low melting point fiber, 60% cotton fiber and 20% chemical fiber.

[0034] (2) Hot pressing molding: Send the laid material into the forming mold, and then pressurize the water vapor, the ventilation time is 5s, the water vapor pressure is 0.8MPa, the water vapor intake time is 9s, and the water vapor exit time It is 17s; after the ventilation is completed, it is transferred to a hot-pressing mold, pressurized to form it, and a molded semi-f...

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PUM

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Abstract

The invention relates to a production technology of a soft and hard layer sound insulating pad of an automobile, belonging to the technical field of automobile interior component manufacture. The sound insulating pad is hot-formed for one time by letting a soft layer fibrofelt, a film and a hard layer fibrofelt be subject to steam heating, wherein, the steps of the method comprise paving the raw materials, carrying out hot forming, molding through adsorption, and cutting with water. The technology reduces production procedures, greatly increases production efficiency, can well control the thicknesses of the soft layer and hard layer. According to the invention, steam has strong penetrating force and good effect of heat transfer, thus the film is completely molten, and the soft and hard layers are bonded firmly. The prepared sound insulating pad of the automobile has good sound insulation performance, and can well satisfy the using requirements of clients.

Description

technical field [0001] The invention specifically relates to a production process of an automobile soft and hard layer sound insulation pad with high production efficiency and firm soft and hard layer bonding, and belongs to the technical field of automobile interior parts manufacturing. Background technique [0002] The car soft and hard layer sound insulation pad is made of soft layer fiber felt, film and hard layer fiber felt. Based on the material composition of soft and hard fiber mats, the traditional process often adopts the method of first drying and then cold pressing to produce sound insulation mats, which has a series of disadvantages: many steps, long drying time and cold pressing time, and low production efficiency; The thickness of the layered fiber mat changes greatly during the drying process, which affects the sound insulation performance of the product; the baked fiber mat is easily deformed during transportation to the cold mold; the heat dissipation duri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/12B32B37/06B32B37/10
Inventor 张丛见
Owner WUXI GISSING AUTO ACOUSTIC PARTS TECH CO LTD