CN107584750B - Hot pressing process of automobile sound insulation diaphragm - Google Patents
Hot pressing process of automobile sound insulation diaphragm Download PDFInfo
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- CN107584750B CN107584750B CN201710699134.0A CN201710699134A CN107584750B CN 107584750 B CN107584750 B CN 107584750B CN 201710699134 A CN201710699134 A CN 201710699134A CN 107584750 B CN107584750 B CN 107584750B
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Abstract
The invention relates to the field of sound insulation materials, in particular to a hot pressing process of an automobile sound insulation diaphragm, which comprises the steps of conveying the sound insulation diaphragm to a vacuum hot pressing platform, and heating to soften the sound insulation diaphragm; pressing the softened sound-proof membrane sheet on a hot-pressing platform by using a pressing plate; applying external force to the periphery of the pressing plate to press the softened sound insulation diaphragm again; and (4) loosening the pressing plate, and taking out the sound insulation diaphragm formed by pressing. The invention firstly carries out preliminary hot pressing on the sound insulation diaphragm by utilizing the pressing plate, then presses the sound insulation diaphragm from the periphery, and simultaneously presses the edge of the sound insulation diaphragm, thereby pressing the sound insulation diaphragm from the center to the periphery and then to the edge of the sound insulation diaphragm, so that the whole diaphragm is pressed more uniformly and compactly, and the sound insulation effect is effectively improved.
Description
Technical Field
The invention relates to the field of sound insulation materials, in particular to a hot pressing process of an automobile sound insulation diaphragm.
Background
The automobile is easy to cause noise in the driving process, and sealing and noise isolation are needed. At present, materials for automobiles are mainly high-foaming rubber-plastic materials with a multilayer composite structure, the manufacturing process of the multilayer high-foaming rubber-plastic materials is complex, the cost is high, and due to different thermal expansion coefficients, the layers can be mutually restricted in the foaming process to influence the foaming multiplying power, so that the phenomenon of peeling between the layers occurs, the gap cannot be filled, and the integral sound insulation effect is influenced. The various thermoplastic resin molecules in the sound insulation layer of the hot pressing process of the automobile sound insulation membrane with the traditional formula are not tightly bonded, the interface bonding between the thermoplastic resin and the filler is poor, the pressing is not compact enough, and the ideal sound insulation effect is difficult to achieve.
Disclosure of Invention
Aiming at the technical problems, the invention provides a hot pressing process for pressing compact automobile sound insulation diaphragms with good sound insulation effect.
The technical scheme adopted by the invention for solving the technical problems is as follows: a hot pressing process of an automobile sound insulation diaphragm comprises the following steps:
(1) conveying the sound insulation membrane to a vacuum hot-pressing platform, and heating to soften the sound insulation membrane;
(2) pressing the softened sound-proof membrane sheet on a hot-pressing platform by using a pressing plate;
(3) applying external force to the periphery of the pressing plate to press the softened sound insulation diaphragm again;
(4) and (4) loosening the pressing plate, and taking out the sound insulation diaphragm formed by pressing.
Preferably, the vacuum degree of the hot-pressing platform is-0.1 MPa.
Preferably, a heating device is provided on the hot press platen to soften the sound-insulating film sheet.
Preferably, the heating temperature of the heating device is 130 to 150 ℃.
Preferably, the press plate also presses the edges of the sound-insulating film sheet.
Preferably, the press time of the press plate is 15-25 min.
According to the technical scheme, the sound insulation diaphragm is initially hot-pressed by the pressing plate, then the sound insulation diaphragm is pressed from the periphery, and the edge of the sound insulation diaphragm is pressed, so that the sound insulation diaphragm is pressed from the center to the periphery and then to the edge, the whole diaphragm is pressed more uniformly and compactly, and the sound insulation effect is effectively improved.
Detailed Description
The invention is described in detail below, with illustrative embodiments and descriptions of the invention provided herein to explain the invention without limiting it.
A hot pressing process of an automobile sound insulation diaphragm comprises the following steps:
firstly, conveying the sound insulation diaphragm to a vacuum hot-pressing platform, and keeping the vacuum degree of the hot-pressing platform at-0.1 MPa to avoid influencing the performance of the sound insulation diaphragm in the hot-pressing process; simultaneously heating on a hot-pressing platform to soften the sound-insulating membrane; particularly, a heating device is arranged on a hot-pressing platform, the heating temperature is controlled to be 130-150 ℃, and the sound-proof membrane can be prevented from being softened excessively.
Then, pressing the softened sound insulation membrane sheet on a hot-pressing platform by using a pressing plate; the pressure plate presses the sound insulation diaphragm from top to bottom, the center of the pressure plate is driven by the driving mechanism to move up and down, and the pressure is adjusted according to the thickness and performance requirements of the diaphragm. Because the pressing plate adopts a central driving mode, the pressure distribution in the center is slightly larger in the pressing process. Therefore, the invention applies external force to the periphery of the pressure plate to press the softened sound insulation diaphragm again, so that the periphery of the sound insulation diaphragm is pressed again, thereby achieving uniform pressing of the center and the periphery and ensuring the uniformity of pressing. In practice, the whole pressing time of the press plate is 15-25 min. Specifically, after the pressing plate is pressed for 2-3mim, intermittently pressing the periphery of the pressing plate by hammering for 2-3 times at an interval of 1 min; this ensures the uniformity of the pressed film.
Preferably, the press plate also presses the edges of the sound-insulating film sheet. In the pressing process of the pressing plate, the pressing of the edge of the pressing plate can be realized through the flange at the edge of the pressing plate, and meanwhile, a corresponding groove is arranged on the hot pressing platform to avoid the edge of the pressing plate from touching the hot pressing platform. The design can utilize the lateral clearance between the flange and the groove to extrude the edge of the sound-insulating membrane, thereby achieving the purpose of pressing and homogenizing the edge; the invention can further press the edge by hammering the periphery, thereby improving the homogenization degree of the edge. After the pressing, the pressing plate is released, and the press-molded sound-insulating film sheet is taken out, thereby obtaining a sound-insulating sheet.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention.
Claims (5)
1. A hot pressing process of an automobile sound insulation diaphragm comprises the following steps:
(1) conveying the sound insulation membrane to a vacuum hot-pressing platform, and heating to soften the sound insulation membrane;
(2) pressing the softened sound-proof membrane sheet on a hot-pressing platform by using a pressing plate;
(3) applying external force to the periphery of the pressing plate to press the softened sound insulation diaphragm again; the pressing plate is used for pressing the edge of the sound insulation film sheet; in the pressing process of the pressing plate, the edge of the pressing plate can be pressed through the arranged flange on the edge of the pressing plate, and meanwhile, the corresponding groove is arranged on the hot pressing platform to prevent the edge of the pressing plate from touching the hot pressing platform;
(4) and (4) loosening the pressing plate, and taking out the sound insulation diaphragm formed by pressing.
2. The hot-pressing process of the automobile sound-insulating membrane as claimed in claim 1, wherein: the vacuum degree of the hot-pressing platform is-0.1 MPa.
3. The hot-pressing process of the automobile sound-insulating membrane as claimed in claim 1, wherein: and a heating device is arranged on the hot-pressing platform to soften the sound-proof membrane.
4. The hot-pressing process of the automobile sound-insulating membrane as claimed in claim 3, wherein: the heating temperature of the heating device is 130-150 ℃.
5. The hot-pressing process of the automobile sound-insulating membrane as claimed in claim 1, wherein: the pressing time of the pressing plate is 15-25 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710699134.0A CN107584750B (en) | 2017-08-16 | 2017-08-16 | Hot pressing process of automobile sound insulation diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710699134.0A CN107584750B (en) | 2017-08-16 | 2017-08-16 | Hot pressing process of automobile sound insulation diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107584750A CN107584750A (en) | 2018-01-16 |
| CN107584750B true CN107584750B (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710699134.0A Active CN107584750B (en) | 2017-08-16 | 2017-08-16 | Hot pressing process of automobile sound insulation diaphragm |
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| CN (1) | CN107584750B (en) |
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| CN102423945B (en) * | 2011-09-10 | 2014-03-19 | 无锡吉兴汽车部件有限公司 | Production technology of soft and hard layer sound insulating pad of automobile |
| CN102673084A (en) * | 2012-05-26 | 2012-09-19 | 无锡吉兴汽车声学部件科技有限公司 | Production method for automobile engine compartment heat-insulating cushion |
| CN105818726A (en) * | 2016-04-21 | 2016-08-03 | 无锡吉兴汽车声学部件科技有限公司 | Production method of multilayered structure under-car carpet acoustic shock absorption pad |
| CN105837926A (en) * | 2016-04-27 | 2016-08-10 | 柳州申通汽车科技有限公司 | Sound-insulating material and preparation method thereof |
| CN205800228U (en) * | 2016-07-22 | 2016-12-14 | 山东理工大学 | A kind of mould of continuous fiber reinforced thermoplastic prepreg tape panel |
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|---|---|---|---|---|
| WO2008046547A1 (en) * | 2006-10-20 | 2008-04-24 | Krd Coaatings Gmbh | Transparent, multi-layered component |
| CN101830023A (en) * | 2010-05-14 | 2010-09-15 | 程国凉 | Manufacture process of high-density bamboo chip plates |
| CN103339669A (en) * | 2011-01-26 | 2013-10-02 | 霓佳斯株式会社 | Sound-proof material and process for production thereof, sound-proof molding, and sound insulation method |
| CN103042681A (en) * | 2011-10-11 | 2013-04-17 | 晟铭电子科技股份有限公司 | Hot press molding device and method thereof |
| CN103318103A (en) * | 2013-07-02 | 2013-09-25 | 无锡吉兴汽车部件有限公司 | Automobile roof decorating plate production method |
| CN103786659A (en) * | 2014-01-25 | 2014-05-14 | 湖北三环汽车工程塑料有限公司 | Light sound insulating pad of composite structure and production method thereof |
| CN204019667U (en) * | 2014-09-02 | 2014-12-17 | 浙江安吉双虎竹木业有限公司 | A kind of hot press |
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| CN107584750A (en) | 2018-01-16 |
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