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Method for manufacturing light-weight air flow resistance adjustable type multilayered structure acoustics component

A technology of air flow resistance and acoustic components, applied in chemical instruments and methods, vehicle components, lamination, etc., can solve problems such as lowering production efficiency, increasing manufacturing processes, and increasing product weight, so as to improve production efficiency, increase production capacity, The effect of saving labor

Inactive Publication Date: 2014-04-02
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

If you continue to use the traditional EPDM or EVA as the isolation layer, on the one hand, the weight of the product will increase, which cannot meet the lightweight requirements; on the other hand, there will also be problems in the connection between the EPDM or EVA layer and the fiber layer: a) If Use the steam heating process to bond the fiber layer with EPDM or EVA back glue. Since EPDM or EVA will be softened at the same time during the heating process, it is easy to stick to the mold during demoulding. Further, if EPDM or EVA is used during the demoulding process, EVA cracks will form waste products, and the gaps on the sound insulation products will greatly reduce the sound insulation effect; b) If the EPDM layer and the fiber layer are bonded together by spraying glue, the manufacturing process will be increased and the production efficiency will be reduced At the same time, the use of glue will also bring certain VOC problems

Method used

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  • Method for manufacturing light-weight air flow resistance adjustable type multilayered structure acoustics component
  • Method for manufacturing light-weight air flow resistance adjustable type multilayered structure acoustics component
  • Method for manufacturing light-weight air flow resistance adjustable type multilayered structure acoustics component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Paving: Lay fiber mat, thermoplastic film and fiber mat in order from bottom to top; the weight of the upper layer of fiber mat is 1000 g / m 2 , the weight of the lower fiber felt is 1200 g / m 2 , the weight of the film used is 25g / m 2 ; The order of paving is as follows image 3 shown;

[0028] (2) Compression molding: Put the paved material into the molding mold for molding, while the molding is pressed, the lower mold is passed through steam, the upper mold is vacuumed, and the material is heated by high-temperature steam to make the upper and lower layers of fibers contain low melting point fibers. The filaments are melted, under the action of pressure, the surrounding fiber filaments are bonded together, and at the same time, the thermoplastic film is also melted, and the upper and lower fiber layers are bonded together to obtain a pressed semi-finished product;

[0029] Molding conditions: Steam pressure: 0.6MPa; Steam temperature: 220℃; Steaming time: 25s Mo...

Embodiment 2

[0035] (1) Paving: Lay fiber mat, thermoplastic film and fiber mat in order from bottom to top; the weight of the upper layer of fiber mat is 1200g / m 2 , the weight of the lower fiber felt is 1500g / m 2 , the weight of the film used is 70g / m 2 ; The order of paving is as follows image 3 shown;

[0036] (2) Compression molding: Put the paved material into the molding mold for molding, while the molding is pressed, the lower mold is passed through steam, the upper mold is vacuumed, and the material is heated by high-temperature steam to make the upper and lower layers of fibers contain low melting point fibers. The filaments are melted, under the action of pressure, the surrounding fiber filaments are bonded together, and at the same time, the thermoplastic film is also melted, and the upper and lower fiber layers are bonded together to obtain a pressed semi-finished product;

[0037] Molding conditions: Steam pressure: 3MPa; Steam temperature: 170℃; Steaming time: 35s Moldin...

Embodiment 3

[0043] (1) Paving: Lay fiber mat, thermoplastic film and fiber mat in order from bottom to top; the weight of the upper layer of fiber mat is 1200g / m 2 , the weight of the lower fiber mat is 1200g / m 2 , the weight of the film used is 35g / m 2 ; The order of paving is as follows image 3 shown;

[0044] (2) Compression molding: Put the paved material into the molding mold for molding, while the molding is pressed, the lower mold is passed through steam, the upper mold is vacuumed, and the material is heated by high-temperature steam to make the upper and lower layers of fibers contain low melting point fibers. The filaments are melted, under the action of pressure, the surrounding fiber filaments are bonded together, and at the same time, the thermoplastic film is also melted, and the upper and lower fiber layers are bonded together to obtain a pressed semi-finished product;

[0045] Molding conditions: Steam pressure: 2MPa; Steam temperature: 200℃; Steaming time: 30s Molding...

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Abstract

The invention relates to a method for manufacturing an acoustics component, which belongs to the technical field of sound insulation and noise reduction of automobile members. The method for manufacturing the acoustics component comprises the following steps: firstly, sequentially overlapping a fiber felt, a thermoplastic airtight EAA (Essential Amino Acid) film and a fiber felt, feeding the materials into a shaping mold, heating the materials by using high-temperature vapor of high penetrating power, forming in a compression molding mode, subsequently cutting the appearance size and holes, and finally inspecting to ensure that no defect exists so as to obtain the acoustics component with a multilayered structure. According to the method, the upper and lower fiber felts are adhered through the adhesion property of the thermoplastic film when being molten at high temperature without being adhered in a manual coating mode on site, so that not only is labor saved and capacity increased, but also the production efficiency is greatly improved, and the security of the environment on the manufacturing field and the health of operators are ensured, and furthermore the air flow resistance of a sound insulating pad is adjusted by using the thermoplastic airtight EAA film, so that the optimization on the acoustics property of an acoustics product is achieved on the basis of constant weight and manufacturing cost.

Description

technical field [0001] The invention relates to a manufacturing method of an automotive acoustic component, in particular to a control method of a multi-layer structural acoustic component that achieves different acoustic effects by adjusting air flow resistance, and belongs to the technical field of sound insulation and noise reduction of automotive components. Background technique [0002] Acoustic components are components that can attenuate or isolate noise. The mechanism of action includes two aspects: sound absorption or sound insulation. The mechanism of sound absorption and sound insulation: sound absorption is to absorb sound energy so that the energy is weakened until it disappears. The principle is that the incident sound wave must enter the material structure, and the energy of the sound wave makes the elastic fiber in the material vibrate, or makes the air molecules in the material pores interact with each other. Impact friction, in which the energy of the sound...

Claims

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Application Information

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IPC IPC(8): B32B37/04B32B37/10B32B37/06B32B38/04B32B38/18B60R13/08
CPCB32B5/22B29C35/049B29C2043/185B29C2043/189B29K2105/128B29L2031/3005B32B5/00B32B5/02B32B7/00B32B7/04B32B7/12B32B27/00B32B27/06B32B27/12B32B27/30B32B27/308B32B27/32B32B2250/00B32B2250/40B32B2262/00B32B2307/10B32B2307/102B32B2307/7242B32B2307/7244B32B2605/00B32B2605/08
Inventor 阮静黄威田秀杰
Owner WUXI GISSING AUTO ACOUSTIC PARTS TECH CO LTD