CN101653997A - Process for producing low-density polyurethane foam sound insulating pad - Google Patents

Process for producing low-density polyurethane foam sound insulating pad Download PDF

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Publication number
CN101653997A
CN101653997A CN200910182808A CN200910182808A CN101653997A CN 101653997 A CN101653997 A CN 101653997A CN 200910182808 A CN200910182808 A CN 200910182808A CN 200910182808 A CN200910182808 A CN 200910182808A CN 101653997 A CN101653997 A CN 101653997A
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China
Prior art keywords
finished
polyurethane foam
sound insulating
insulating pad
low
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Pending
Application number
CN200910182808A
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Chinese (zh)
Inventor
陈涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Jixing Auto Acoustic Parts Technology Co Ltd
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Wuxi Jixing Auto Acoustic Parts Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Wuxi Jixing Auto Acoustic Parts Technology Co Ltd filed Critical Wuxi Jixing Auto Acoustic Parts Technology Co Ltd
Priority to CN200910182808A priority Critical patent/CN101653997A/en
Publication of CN101653997A publication Critical patent/CN101653997A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a process for producing a sound insulating pad of a car, in particular to a process for producing a low-density polyurethane foam sound insulating pad. The process for producing the sound insulating pad for being installed at parts, such as an engine cover of the car, and the like and playing roles of heat and sound insulation and beautification belongs to the technical field of manufacture of interior parts of cars. The process for producing the low-density polyurethane foam sound insulating pad comprises the following steps: (1) laying materials: firstly, laying non-woven fabric; secondly, placing a piece of low-density polyurethane foam on the non-woven fabric; and thirdly, placing non-woven fabric on the low-density polyurethane foam to form a semi-finished product; (b) pressing and molding: pressing and molding the semi-finished product of the step (a) in a die by a press to form a finished product; (c) cooling and molding: cooling the cut finished productto normal temperature so that the finished product is molded. The molding takes the assembly of the whole car into consideration, the assembly requirement of the size of the sound insulating pad is met by cooling and molding, and the part is difficult to deform; and the cooling time is controlled to 45-55 seconds.

Description

The production technology of low-density polyurethane foam sound insulating pad
Technical field
The present invention relates to a kind of production technology of vehicle noise insulation pad, a kind of production technology of low-density polyurethane foam sound insulating pad specifically, be used to be installed in positions such as automobile cover, play heat insulation, sound insulation and the sound insulating pad production technology of the effect that beautifies, belong to automotive upholstery manufacturing technology field.
Background technology
Automotive upholstery generally is installed on automotive interior, the effect of playing heat insulation, sound insulation and beautifying.More and more pursuing high-performance, environment-friendly type, energy-saving, lightweight, personalized epoch, the interior trim of automobile is the same with the profile of automobile, becomes the key factor that people choose automobile.Therefore also more and more higher to the requirement of automotive upholstery.In the prior art, performance indications such as the high sound-absorbing of sound insulating pad, low grammes per square metre, NVH become bottleneck, are restricting the development of sound insulating pad.Existing roof liner normally adopts mineral wool to add the lining moulding, and this kind moulding process mainly exists following problem: 1, the sound-absorbing index does not reach requirement; 2, product rigidity is poor, frangibility; 3, product weight is big, is unfavorable for the car load lightweight, and is energy-conservation.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide that a kind of sound absorption qualities is good, rigidity greatly, the not production technology of the low-density polyurethane foam sound insulating pad of frangibility, light weight, and this production process do not have harmful substance to produce.
General low-density polyurethane foam can't be fitted with nonwoven.So this low-density polyurethane foam need use high temperature when producing.
According to technical scheme provided by the invention, the production technology of described low-density polyurethane foam sound insulating pad comprises following steps:
(a), material lay: nonwoven of first lay; Low-density polyurethane foam of placement on described nonwoven again, the density of described low-density polyurethane foam is at 15g/m 2~20g/m 2, one of placement nonwoven lining on low-density polyurethane foam forms semi-finished product again;
(b), compression moulding: the semi-finished product of step a are utilized press compression moulding in mould, form finished product; During compression moulding, the patrix temperature is controlled at: 190~200 ℃, the counterdie temperature is controlled at: 195~210 ℃, briquetting pressure is controlled at: 110~120kgf/cm 2, molding time is controlled at: 90~100S;
Before compression moulding, the toasting performance of utilizing press earlier and being had is toasted the semi-finished product of step a, and baking temperature is 170 ℃~180 ℃, and stoving time is 30~35sec;
After the compression moulding, utilize the severing function of press, the shape need of the back finished product that forms of compacting according to sound insulating pad cut, make it the edge severing, satisfy the appearance requirement of product;
(c), cooling and shaping: the finished product after will cutting is cooled to normal temperature, makes its typing; Typing is an assembling of considering car load, satisfies the matching requirements of sound insulating pad size by cooling and shaping, and part is not yielding; Be controlled at cool time: 45~55sec.
Advantage of the present invention is: sound absorption qualities is good, rigidity greatly, the not production technology of the low-density polyurethane foam sound insulating pad of frangibility, light weight, and this production process do not have harmful substance to produce.
The specific embodiment
Embodiment 1
Production Shanghai GM model is the cover sound insulating pad of D06, and the roof liner specification is: 1250mm * 500mm.
1, material lay: upper surface is placed one of nonwoven lining, needs composite glue powder overleaf.(density is at 17g/m for middle one of low-density polyurethane foam of placement 2), one of common non-woven fabric is placed in the below, needs composite glue powder overleaf.
2, compression moulding: the semi-finished product of step 1 are pressed in mould, and the patrix temperature is controlled at during compression moulding: 190~200 ℃, the counterdie temperature is controlled at during compression moulding: 195~210 ℃, briquetting pressure is controlled at: 110~120kgf/cm 2, molding time is controlled at: 90~100S, this product D06 cover sound insulating pad needs before moulding with falling the baking that the toasting performance of make-up machine advances.Make the compression moulding semi-finished product; Make the substrate forming of sound insulating pad after the compacting by heating mould, the severing function of opening machine simultaneously makes it the edge severing, satisfies the appearance requirement of material product; Stoving time is controlled at: 30~35sec; Baking temperature is 170 ℃~180 ℃
3, cooling and shaping: the compression moulding finished product of step 2 is cooled to normal temperature, makes its typing; Typing is an assembling of considering car load, satisfies the matching requirements of sound insulating pad size by cooling and shaping, and part is not yielding; Be controlled at cool time: 45~55sec.At the sag of chain of testing product by experiment, show that product meets the experimental standard requirement by the situation of requirement of experiment.Come the size conforms degree coincidence rate of testing product to reach 100% according to cubing and meet the product tolerance.
By above step, just can produce a performance, with all satisfactory cover sound insulating pad of outward appearance.
Embodiment 2
Production Shanghai GM model be D06 before enclose outer sound insulating pad, the roof liner specification is: 1250mm * 200mm.
1, material lay: upper surface is placed one of nonwoven lining, needs composite glue powder overleaf.(density is at 18g/m for middle one of low-density polyurethane foam of placement 2), one of common non-woven fabric is placed in the below, needs at the back side of low-density polyurethane foam composite glue powder.Described rubber powder is a kind of macromolecular material, and this material at high temperature can reacting melt.Produce bonding force, nonwoven and low-density PU are bonded together.The consumption of general rubber powder is controlled at 25g/m 2~30g/m 2
2, compression moulding: the semi-finished product of step 1 are made type at mould inner pressure, and during compression moulding, the patrix temperature is controlled at: 190~205 ℃, the counterdie temperature is controlled at: 195~215 ℃, briquetting pressure is controlled at: 105~111kgf/cm 2, molding time is controlled at: 90~100S.Enclose outer sound insulating pad before this product D06, before moulding, need with falling the baking that the toasting performance of make-up machine advances.Make the compression moulding semi-finished product; Make the substrate forming of sound insulating pad after the compacting by heating mould, the severing function of opening machine simultaneously makes it the edge severing, satisfies the appearance requirement of material product; Stoving time is controlled at: 30~35sec.Baking temperature is 170 ℃~180 ℃
3, cooling and shaping: the compression moulding finished product of step 2 is cooled to normal temperature, makes its typing; Typing is an assembling of considering car load, satisfies the matching requirements of sound insulating pad size by cooling and shaping, and part is not yielding; Be controlled at cool time: 45~55sec.At the sag of chain of testing product by experiment, show that product meets the experimental standard requirement by the situation of requirement of experiment.Come the size conforms degree coincidence rate of testing product to reach 100% according to cubing and meet the product tolerance.

Claims (1)

1, a kind of production technology of low-density polyurethane foam sound insulating pad is characterized in that, described production technology comprises the steps:
(a), material lay: nonwoven of first lay; Low-density polyurethane foam of placement on described nonwoven again, the density of described low-density polyurethane foam is at 15g/m 2~20g/m 2, one of placement nonwoven lining on low-density polyurethane foam forms semi-finished product again;
(b), compression moulding: the semi-finished product of step a are utilized press compression moulding in mould, form finished product; During compression moulding, the patrix temperature is controlled at: 190~200 ℃, the counterdie temperature is controlled at: 195~210 ℃, briquetting pressure is controlled at: 110~120kgf/cm 2, molding time is controlled at: 90~100S;
Before compression moulding, the toasting performance of utilizing press earlier and being had is toasted the semi-finished product of step a, and baking temperature is 170 ℃~180 ℃, and stoving time is 30~35sec;
After the compression moulding, utilize the severing function of press, the shape need of the back finished product that forms of compacting according to sound insulating pad cut, make it the edge severing, satisfy the appearance requirement of product;
(c), cooling and shaping: the finished product after will cutting is cooled to normal temperature, makes its typing; Typing is an assembling of considering car load, satisfies the matching requirements of sound insulating pad size by cooling and shaping, and part is not yielding; Be controlled at cool time: 45~55sec.
CN200910182808A 2009-09-07 2009-09-07 Process for producing low-density polyurethane foam sound insulating pad Pending CN101653997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910182808A CN101653997A (en) 2009-09-07 2009-09-07 Process for producing low-density polyurethane foam sound insulating pad

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200910182808A CN101653997A (en) 2009-09-07 2009-09-07 Process for producing low-density polyurethane foam sound insulating pad

Publications (1)

Publication Number Publication Date
CN101653997A true CN101653997A (en) 2010-02-24

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CN (1) CN101653997A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102423945A (en) * 2011-09-10 2012-04-25 无锡吉兴汽车部件有限公司 Production technology of soft and hard layer sound insulating pad of automobile
CN102431260A (en) * 2011-09-10 2012-05-02 无锡吉兴汽车部件有限公司 Manufacturing method of automobile sound insulation pad
CN102441919A (en) * 2011-09-10 2012-05-09 无锡吉兴汽车部件有限公司 Production process of automobile sound-insulating and heat-insulating pad
CN102529839A (en) * 2010-12-23 2012-07-04 上海新安汽车隔音毡有限公司 Multilayer-structure sound-proof and heat-proof cushion used for automotive engine cabin and manufacture method thereof
CN102874184A (en) * 2012-10-12 2013-01-16 无锡吉兴汽车声学部件科技有限公司 Production method of automotive cockpit front wall sound insulation pad
CN103182810A (en) * 2011-12-28 2013-07-03 上海新安汽车隔音毡有限公司 Composite layer type sound and heat insulation pad for engine compartment
CN104325773A (en) * 2014-10-30 2015-02-04 烟台正海汽车内饰件有限公司 Production method of spare-tyre cover plate and spare-tyre cover plate produced by using production method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102529839B (en) * 2010-12-23 2014-08-27 上海新安汽车隔音毡有限公司 Multilayer-structure sound-proof and heat-proof cushion used for automotive engine cabin and manufacture method thereof
CN102529839A (en) * 2010-12-23 2012-07-04 上海新安汽车隔音毡有限公司 Multilayer-structure sound-proof and heat-proof cushion used for automotive engine cabin and manufacture method thereof
CN102423945A (en) * 2011-09-10 2012-04-25 无锡吉兴汽车部件有限公司 Production technology of soft and hard layer sound insulating pad of automobile
CN102431260A (en) * 2011-09-10 2012-05-02 无锡吉兴汽车部件有限公司 Manufacturing method of automobile sound insulation pad
CN102431260B (en) * 2011-09-10 2014-01-22 无锡吉兴汽车部件有限公司 Manufacturing method of automobile sound insulation pad
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
CN102441919A (en) * 2011-09-10 2012-05-09 无锡吉兴汽车部件有限公司 Production process of automobile sound-insulating and heat-insulating pad
CN103182810B (en) * 2011-12-28 2016-01-06 上海新安汽车隔音毡有限公司 A kind of enging cabin composite stratotype sound-heat insulated cushion
CN103182810A (en) * 2011-12-28 2013-07-03 上海新安汽车隔音毡有限公司 Composite layer type sound and heat insulation pad for engine compartment
CN102874184A (en) * 2012-10-12 2013-01-16 无锡吉兴汽车声学部件科技有限公司 Production method of automotive cockpit front wall sound insulation pad
CN104325773A (en) * 2014-10-30 2015-02-04 烟台正海汽车内饰件有限公司 Production method of spare-tyre cover plate and spare-tyre cover plate produced by using production method

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Application publication date: 20100224