CN103753891B - Automobile interior trim part and forming process for same - Google Patents

Automobile interior trim part and forming process for same Download PDF

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Publication number
CN103753891B
CN103753891B CN201310755098.7A CN201310755098A CN103753891B CN 103753891 B CN103753891 B CN 103753891B CN 201310755098 A CN201310755098 A CN 201310755098A CN 103753891 B CN103753891 B CN 103753891B
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pressurize
layer
pressure release
automotive upholstery
cystosepiment
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CN103753891A (en
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刘新义
宋伟康
杜洪超
赵磊
许琰
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Great Wall Motor Co Ltd
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Tianjin Boxin Automotive Parts Co Ltd
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Abstract

The invention provides an automobile interior trim part and a forming process for the same. The automobile interior trim part sequentially consists of a composite knitted fabric layer, a fiberglass mat, a PU (polyurethane) foam sheet, the fiberglass mat and a PET (polyethylene terephthalate) material layer from top to bottom. The automobile interior trim part and the forming process for the same have the advantages and positive effects that the cost is lowered, the production efficiency is improved, and the occurrence rate of quality problems is lowered; sound insulation and noise reduction effects can be achieved, and the NVH (noise vibration and harshness) performance of a product assembly can be improved; energy is saved, and the consumption is reduced.

Description

A kind of automotive upholstery and moulding process thereof
Technical field
The invention belongs to technical field of automobile, particularly relate to a kind of automotive upholstery and moulding process thereof.
Background technology
Along with the development of automobile industry, car load NVH performance day is more concerned, also more and more higher to the NVH performance requirement of auto parts and components.Roof of the vehicle is important sound-absorbing member, plays Main Function in car load; Roof of the vehicle moulding process now mainly contains two kinds of moulding process, and one is dry process for forming, and be also called the cold mold forming mode of heat material, this molding mode is mainly the heating of PU composite plate, and sheet material temperature is about 180 DEG C, with the compression molding in a mold of product fabric;
Two is wet therapy forming process, wet therapy forming process is divided into again Wet One-step moulding process and wet method two-step method moulding process, wet therapy forming process, also known as cold burden hot-die molding mode, wet method two-step method is first molded substrate mainly, as depicted in figs. 1 and 2, wherein mold temperature requires is 120 DEG C-140 DEG C, after glue spraying on base material again, in hot-die, again carry out fabric bonding, realize half-finished making, wherein mold temperature requires is 100 DEG C-110 DEG C; Wet One-step is one-step shaping, as shown in Figure 3, raw material and fabric are superimposed together simultaneously, in hot-die, pressurize is shaping, wherein require that temperature is 150 DEG C, a pressurize molding semi product, for ensureing product appearance quality, can increase one deck three layers of glued membrane in fabric and glass mat during technological forming.
Because the NVH performance of the shaping wet therapy forming process of ceiling and the performance such as high temperature resistant are all better than dry process for forming, wet therapy forming process is then later stage main flow direction; Wet method two-step method moulding process demand mould two overlaps, and requires that mould must exist good uniformity, and higher to composite die die cavity clearance requirement, easily occurs because the problem of coming unglued appears in the change of die cavity gap; Repair a die difficulty, is difficult to the matching of guarantee two mold, easily causes product appearance bad; Wet One-step mould is a set of mould of use compared with two-step method moulding process advantage, for ensureing the presentation quality of product, increase by three layers of adhesive film material, require higher to mold temperature, mold temperature is lower than PE fusing point (mold temperature demand >=150 DEG C), and require that fabric has good heat conductivility, easily cause product precoat and three layers of adhesive film to occur the problem of coming unglued, affect the quality of product; Three layers of glued membrane and knit fabric are Split type structure, easily in superposition operation and mold process because product quasi spline and other reasons cause three layers of glued membrane out-of-flatness to occur superposing, lack material etc. and affect the problem of product appearance quality.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of automotive upholstery and moulding process thereof, this technique requires lower to mold temperature and fabric performance, and avoid, because control point holds the problem appearance being forbidden to cause product bad, being particularly useful for automotive upholstery ceiling and sunshading board moulding process.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of automotive upholstery, is composited by compound knitted fabric layer, glass mat, PET material layer.
Preferably, described compound knitted fabric layer is made up of looped fabric, PU foamed cotton layer and PA film.
Preferably, described compound knitted fabric layer is composited by glue or flame processes by looped fabric, PU foamed cotton layer and PA film.
Preferably, be made up of compound knitted fabric layer, glass mat, PU cystosepiment, glass mat, PET material layer successively from top to bottom.
Existing Wet One-step moulding process mostly be prevent strike-through occur surface bad, three layers of glued membrane are increased between the existing compound knitted fabric of the superiors' material and its subsurface material glass mat, i.e. PE+PA+PE layer, and the present invention cancels the non-woven fabrics that knit fabric bottom plays the effect of resistance glue, change three layers of film structure, three layers of glued membrane are changed to individual layer PA film, by compound knitted fabric directly and PA film carry out compound, namely molding structure is more existing changes.
PU in PU foamed cotton layer and PU cystosepiment refers to polyurethane; But the density of PU foamed cotton layer and PU cystosepiment is different, the density of foam is 22kg/m 3, and the density of cystosepiment is 26-30kg/m 3, both calculation big powers power and elongation at break are also different, and density is larger, product ultimate strength is larger, PET in the less PET material layer of elongation at break refers to PETG, is commonly called as polyester resin, and it is the condensation polymer of terephthalic acid (TPA) and ethylene glycol; PA film refers to polyamide, is commonly called as nylon, and the PA film in the present invention is composited by nylon 6 and nylon66 fiber; PE+PA+PE layer refers to polyethylene+nylon+polyethylene layer.
The present invention also provides a kind of technique of producing automotive upholstery as above, comprises following procedure of processing:
(1), by described PU cystosepiment carry out top and bottom gluing through roller glue machine, then carry out PU cystosepiment and spray water, wherein the mass ratio of glue and water is 2:1 ~ 1:1;
(2), by the PU cystosepiment of PET material layer, glass mat, double spread, glass mat and compound knitted fabric layer superpose successively from the bottom to top, deliver in die cavity after having superposed;
(3), cold burden heat-die compaction is shaping, and wherein the temperature of mould is 120 DEG C ~ 140 DEG C, carries out pressurize, dwell pressure is 10MPa-15MPa, in pressure maintaining period, interval is vented, and after shaping pressurize, 4 ~ 6s carries out pressure release, after pressure release completes, again carry out pressurize, after pressurize is spaced apart 12 ~ 18s, be again exhausted pressure release, after pressure release completes again after pressurize 15 ~ 25s, complete the half-finished making of automotive upholstery;
(4), automotive upholstery semi-finished product are carried out cut, bound edge, inspection.
Preferably, the production technology of described compound knitted fabric layer is by the middle foamed cotton layer that burns, and looped fabric and PA film is bonded to respectively the two sides of middle foamed cotton layer.
Preferably, the respectively uniform gluing water in the top and bottom of middle foamed cotton layer, at 120 DEG C ~ 140 DEG C, is bonded to the two sides of middle foamed cotton layer respectively by looped fabric and PA film, bonds at the temperature namely bondd at applicable glue.。
Preferably, in step (3), cold burden heat-die compaction is shaping, wherein the temperature of mould is 120 DEG C ~ 140 DEG C, carries out pressurize, and dwell pressure is 100T ~ 120T, in pressure maintaining period, interval is vented, and after shaping pressurize, 5s carries out pressure release, after pressure release completes, again carry out pressurize, after pressurize is spaced apart 15s, be again exhausted pressure release, after pressure release completes again after pressurize 20s, complete the half-finished making of automotive upholstery;
Existing wet therapy forming process needs mold temperature higher, the impact of limited three layers of glued membrane fusing point, and mold temperature must higher than 150 DEG C, and the present invention only needs mold temperature to meet glue reaction temperature.Existing moulding process is that guarantee three layers of glued membrane melt completely, evacuation time and pressurize longer for interval time.
The advantage that the invention has and good effect are:
1), cost reduces, and the technique effect that the present invention reaches is better than prior art, and saves the cost of two-layer PE on fabric bottom non-woven fabrics and three layers of glued membrane;
2), production efficiency improve, compound knitted fabric layer directly carries out flame compound or glue compound by producer, without the need to repeat superposition;
3), because PA film has good tensile property, can not cause occurring buckling problems in process, quality problems incidence reduces;
4), the introduction of PA film, the effect of sound insulation and noise reduction can be played, improve the NVH performance of product assembly;
5), save energy and reduce the cost, existing one step processing technique is higher to mold temperature demand, and must ensure the fusing point of raw material temperature more than PE in three layers of glued membrane, general mold temperature is greater than 150 DEG C, and the program only need meet the reaction temperature of roller glue glue.
Accompanying drawing explanation
Fig. 1 is existing wet method two-step method molded substrate structural representation;
Fig. 2 is existing wet method two-step method fabric composite molding structural representation;
Fig. 3 is the shaping material structure schematic diagram of existing Wet One-step;
Fig. 4 is the structural representation of the material of wet moulding in the present invention;
Fig. 5 is the structural representation of compound knitted fabric in the present invention;
In figure: 1, PET material layer; 2, glass mat; 3, PU cystosepiment; 4, molded substrate; 5, adhesive; 6, existing compound knitted fabric layer; 7, PE+PA+PE layer; 8, looped fabric; 9, PU foamed cotton layer; 10, PA film; 11, compound knitted fabric layer.
Detailed description of the invention
Embodiment one
A kind of automotive upholstery, is made up of compound knitted fabric layer, glass mat, PU cystosepiment, glass mat, PET material layer from top to bottom successively.
Produce a technique for automotive upholstery as above, comprise following procedure of processing:
(1), by described PU cystosepiment carry out top and bottom gluing through roller glue machine, then carry out PU cystosepiment and spray water, wherein the ratio of glue and water is 2:1;
(2), by the PU cystosepiment of PET material layer, glass mat, double spread, glass mat and compound knitted fabric layer superpose successively from the bottom to top, deliver in die cavity after having superposed;
(3), cold burden heat-die compaction is shaping, and wherein the temperature of mould is 140 DEG C, carries out pressurize, dwell pressure is 10MPa-15MPa, in pressure maintaining period, interval is vented, and after shaping pressurize, 6s carries out pressure release, after pressure release completes, again carry out pressurize, after pressurize is spaced apart 18s, be again exhausted pressure release, after pressure release completes again after pressurize 25s, complete the half-finished making of automotive upholstery;
(4), automotive upholstery semi-finished product are carried out cut, bound edge, inspection.
Wherein, the production technology of described compound knitted fabric layer is by the middle foamed cotton layer that burns, and looped fabric and PA film is bonded to respectively the two sides of middle foamed cotton layer.
Embodiment two
A kind of automotive upholstery, is made up of compound knitted fabric layer, glass mat, PU cystosepiment, glass mat, PET material layer from top to bottom successively.
Produce a technique for automotive upholstery as above, comprise following procedure of processing:
(1), by described PU cystosepiment carry out top and bottom gluing through roller glue machine, then carry out PU cystosepiment and spray water, wherein the ratio of glue and water is 1.5:1;
(2), by the PU cystosepiment of PET material layer, glass mat, double spread, glass mat and compound knitted fabric layer superpose successively from the bottom to top, deliver in die cavity after having superposed;
(3), cold burden heat-die compaction is shaping, and wherein the temperature of mould is 130 DEG C, carries out pressurize, dwell pressure is 10MPa-15MPa, in pressure maintaining period, interval is vented, and after shaping pressurize, 5s carries out pressure release, after pressure release completes, again carry out pressurize, after pressurize is spaced apart 15s, be again exhausted pressure release, after pressure release completes again after pressurize 20s, complete the half-finished making of automotive upholstery;
(4), automotive upholstery semi-finished product are carried out cut, bound edge, inspection.
Wherein, the production technology of described compound knitted fabric layer is at the top and bottom of middle foamed cotton layer difference uniform gluing water, under preference temperature, looped fabric and PA film are bonded to respectively the two sides of middle foamed cotton layer, the different temperatures of glue is different, generally at about 80 DEG C temperature, completes compound.
Embodiment three
A kind of automotive upholstery, is made up of compound knitted fabric layer, glass mat, PU cystosepiment, glass mat, PET material layer from top to bottom successively.
Produce a technique for automotive upholstery as above, comprise following procedure of processing:
(1), by described PU cystosepiment carry out top and bottom gluing through roller glue machine, then carry out PU cystosepiment and spray water, wherein the ratio of glue and water is 1:1;
(2), by the PU cystosepiment of PET material layer, glass mat, double spread, glass mat and compound knitted fabric layer superpose successively from the bottom to top, deliver in die cavity after having superposed;
(3), cold burden heat-die compaction is shaping, and wherein the temperature of mould is 120 DEG C, carries out pressurize, dwell pressure is 10MPa-15MPa, in pressure maintaining period, interval is vented, and after shaping pressurize, 4s carries out pressure release, after pressure release completes, again carry out pressurize, after pressurize is spaced apart 12s, be again exhausted pressure release, after pressure release completes again after pressurize 20s, complete the half-finished making of automotive upholstery;
(4), automotive upholstery semi-finished product are carried out cut, bound edge, inspection.
The production technology of described compound knitted fabric layer is by the middle foamed cotton layer that burns, and looped fabric and PA film is bonded to respectively the two sides of middle foamed cotton layer.
Above the embodiment of the invention has been described in detail, but described content being only the preferred embodiments of the invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the invention scope change and improve, and all should still belong within this patent covering scope.

Claims (4)

1. produce a technique for automotive upholstery, described automotive upholstery, be made up of compound knitted fabric layer, glass mat, PU cystosepiment, glass mat, PET material layer successively from top to bottom, it is characterized in that, comprise following procedure of processing:
(1), by described PU cystosepiment carry out top and bottom gluing through roller glue machine, then spray water to PU cystosepiment, wherein the mass ratio of glue and water is 2:1 ~ 1:1;
(2), by the PU cystosepiment of PET material layer, glass mat, double spread, glass mat and compound knitted fabric layer superpose successively from the bottom to top, deliver in die cavity after having superposed;
(3), cold burden heat-die compaction is shaping, and wherein the temperature of mould is 120 DEG C ~ 140 DEG C, carries out pressurize, dwell pressure is 10MPa-15MPa, in pressure maintaining period, interval is vented, and after shaping pressurize, 4 ~ 6s carries out pressure release, after pressure release completes, again carry out pressurize, after pressurize is spaced apart 12 ~ 18s, be again exhausted pressure release, after pressure release completes again after pressurize 15 ~ 25s, complete the half-finished making of automotive upholstery;
(4), automotive upholstery semi-finished product are carried out cut, bound edge, inspection.
2. technique of producing automotive upholstery as claimed in claim 1, is characterized in that: the production technology of described compound knitted fabric layer is by the middle foamed cotton layer that burns, and looped fabric and PA film is bonded to respectively the two sides of middle foamed cotton layer.
3. technique of producing automotive upholstery as claimed in claim 1, it is characterized in that: the production technology of described compound knitted fabric layer is at the top and bottom of middle foamed cotton layer difference uniform gluing water, at 120 DEG C ~ 140 DEG C, looped fabric and PA film are bonded to respectively the two sides of middle foamed cotton layer.
4. the technique of the production automotive upholstery as described in any one of claims 1 to 3, it is characterized in that: in step (3), cold burden heat-die compaction is shaping, wherein the temperature of mould is 120 DEG C ~ 140 DEG C, carry out pressurize, dwell pressure is 10MPa-15MPa, in pressure maintaining period, interval is vented, and after shaping pressurize, 5s carries out pressure release, after pressure release completes, again carry out pressurize, after pressurize is spaced apart 15s, be again exhausted pressure release, after pressure release completes again after pressurize 20s, complete the half-finished making of automotive upholstery.
CN201310755098.7A 2013-12-30 2013-12-30 Automobile interior trim part and forming process for same Active CN103753891B (en)

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CN104210562B (en) * 2014-08-22 2016-07-06 无锡吉兴汽车声学部件科技有限公司 The production technology on automobile bamboo slab rubber floor
CN104309546B (en) * 2014-10-08 2016-07-06 安徽省地坤汽车天窗科技有限公司 A kind of vehicle dormer window ceiling is cotton
CN105398184A (en) * 2015-10-26 2016-03-16 烟台正海合泰科技股份有限公司 Production method of flexible PU skylight sun shield
CN105479914B (en) * 2015-12-28 2018-06-26 武汉泰宇汽车零部件有限公司 A kind of textile type engine bonnet preparation method
CN106346937A (en) * 2016-08-24 2017-01-25 烟台正海合泰科技股份有限公司 Production method of wet-process automotive interior ceiling
CN106113650A (en) * 2016-08-27 2016-11-16 费孝锋 A kind of automobile inner decoration facing
CN106182946A (en) * 2016-08-27 2016-12-07 费孝锋 A kind of fabric of automobile decoration
CN108501408A (en) * 2018-04-10 2018-09-07 安庆永大体育文化有限公司 The processing method of TPU musculus cutaneus on a kind of surfboard moulded board
CN110421940A (en) * 2019-09-06 2019-11-08 无锡吉兴汽车声学部件科技有限公司 A kind of automobile ceiling skylight reinforcing frame and its hot-die punch forming process

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CN103434253A (en) * 2013-08-22 2013-12-11 烟台正海汽车内饰件有限公司 Production method of low-gram-weight high-intensity automobile inner trim ceiling

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CN202805842U (en) * 2012-06-29 2013-03-20 长城汽车股份有限公司 Automobile internal decorative head cover
CN103434253A (en) * 2013-08-22 2013-12-11 烟台正海汽车内饰件有限公司 Production method of low-gram-weight high-intensity automobile inner trim ceiling

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Effective date of registration: 20211109

Address after: 071000 No. 2266 Chaoyang South Street, Hebei, Baoding

Patentee after: GREAT WALL MOTOR Co.,Ltd.

Address before: 300462 No. 99, South Street, West District, Binhai New Area Development Zone, Tianjin

Patentee before: TIANJIN BOXIN AUTOMOBILE PARTS Co.,Ltd.

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