CN103240890B - A kind of method preparing noise reduction felt for automobile - Google Patents
A kind of method preparing noise reduction felt for automobile Download PDFInfo
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- CN103240890B CN103240890B CN201310178764.5A CN201310178764A CN103240890B CN 103240890 B CN103240890 B CN 103240890B CN 201310178764 A CN201310178764 A CN 201310178764A CN 103240890 B CN103240890 B CN 103240890B
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Abstract
The present invention relates to a kind of preparation method of noise reduction felt for automobile, belong to automotive interior part manufacturing technology field.It directly adopts artificial cellosilk and regeneration cotton filament and broken foam beads to be raw material, first carry out shredding and mixing, then dried the conformal felt of the integration that the steps such as the die-cut or Water Cutting of temperature heating, curing molding of colding pressing, clout produce by vacuum suction preformed, steam successively.This production efficiency is high, and the felt environmental protection characteristic produced is good, and acoustics NVH good combination property, meets the index request of sedan limousine for aspects such as environmental protection characteristics.
Description
Technical field
The present invention relates to a kind of preparation method of noise reduction felt for automobile, particularly relate to a kind of can according to the shape of plates of automobile, make zones of different different-thickness through mould pressing process but there is the novel manufacturing method of the car felt of homogeneous volume density, belonging to automotive interior part manufacturing technology field.
Background technology
The classical production process of domestic automobile noise reduction felt be generally use assorted cotton, return and spin that cotton blending is made into different size specification, felt sheet that surface density is identical, after to heating materials, then through molded curing formation felt product with phenolic resins etc.
Adopt the felt product that classical production process is made, thickness is generally at below 25mm, when thickness is more than 25mm, need to make felt paste block separately, as the feed supplement of more than 25mm thickness area, stick with glue agent feed supplement and major ingredient to be fit together, cause the production process of the cotton felt of monolithic many, cost of manufacture is high.
When adopting classical production process to make felt, raw material is the cotton felt of sheet material, and its elongation is limited, when the depth of cavity of the goods of target is more than 300mm or profile transition more complicated, when having multilayer to transfer, cotton felted terxture there will be the shape of having loose bowels or cannot form setting.
When adopting classical production process to make felt, because the surface density of the cotton felt material of raw material sets according to the required material weight of the maximum thickness of area percentage that accounts in goods, this thickness is generally 20mm, in the region that goods are thinner, design thickness generally only has 2 ~ 3mm, cotton felt material is difficult to be extruded to such thickness, and the distortion and shaping rear felt easily has a rebound, therefore the thickness in these regions is difficult to the required precision reaching design.
When adopting classical production process to make felt, raw materials size is according to maximum profile arrangement regular contour shape, and the most appearance profile of the product produced is irregular, section peripheral regions does not need material, therefore the felt clout of conventional method generation is many, and be difficult to recycle, the cost of raw material is high.
Adopt the felt that conventional method makes, felt product acoustical behavior generally designs according to the requirement of minimax thickness, and the thickness distribution of felt product is continually varying from small to large, and the acoustical behavior of whole product is determined by whole product instead of determined by minimax thickness separately, therefore, the felt of conventional method design is difficult to realize optimizing and balance at cost and performance face.
Adopt the felt that conventional method makes, owing to employing phenolic resins etc. as binding agent, the VOC performance of product is difficult to reduce.
Therefore, research and development produce a kind of can have with plates of automobile shape, to fit the felt of plates of automobile completely, and raw materials for production utilization rate is high, is easy to the method reclaimed, and for automobile noise reduction, promotes VOC performance and environmental protection has great importance.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, there is provided and directly adopt artificial cellosilk and regeneration cotton filament and broken foam beads to be raw material, first carry out shredding and mixing, then dried the conformal felt of the integration that the steps such as the die-cut or Water Cutting of temperature heating, curing molding of colding pressing, clout produce by vacuum suction preformed, steam successively.This production efficiency is high, and the felt environmental protection characteristic produced is good, and acoustics NVH good combination property, meets the index request of sedan limousine for aspects such as environmental protection characteristics.
According to technical scheme provided by the invention, a kind of method preparing noise reduction felt for automobile, step is as follows:
A, shredding process: take staple fibre 1 ~ 3 part, regeneration cotton fiber 3 ~ 6 parts, low melting point thermoplastic fibre 2 ~ 3 parts and the broken sponge particles of elasticity 0.2 ~ 1 part, first shredding process is carried out, the staple fibre of cluster-shaped, regeneration cotton fiber and low melting point thermoplastic fibre are dispersed as fluffy filament, and the volume density of breaing up rear fiber is 50 ~ 80kg/m
3, broken for bulk elasticity sponge particles is dispersed as the sponge particles scattered, and the material after breaing up is sent into a large storehouse (1) and is mixed, and obtains mixed raw material;
B, preformed: in preformed storehouse (11), by feeding unit (10), step b gained mixed material is broken up further, coordinate the hot blast that bottom, preformed storehouse (11) is blown into, mixed material is sprayed in the preforming tool (2) at preformed storehouse (11) top, and hot blast temperature is 200 ~ 280 DEG C;
The preparation of c, preform: by the mode of vacuum suction, the raw material of step b gained mixing is adsorbed onto on preforming tool (2) from the bottom to top, by the control to absorption affinity size that size and the arrangement mode of pore on adjustment mould realize, realize zones of different absorption on preforming tool and obtain Different Weight raw material, obtain like this needing the weight of setting, the preform (3) of thickness distribution by production, the time of vacuum suction stone is 60 ~ 90s;
D, melting: preform (3) is transferred in Steam Heating mould (5) by the adsorption jig on manipulator (4); By Steam Heating mould (5) upper and lower mould matched moulds, then the steam of logical 160 ~ 200 DEG C, heats preform (3), keeps temperature 160 ~ 200 DEG C heating 20 ~ 40s, the filament in raw material is melted;
E, mold pressing and sizing of colding pressing: get the raw material after steps d melting and carry out preliminary mold pressing, pressure is 5 ~ 10MPa, and clamp time is 10 ~ 20s, obtain heating semifinished product (6); To heat in semifinished product (6) feeding cold pressing forming mould (8) and carry out cold moudling, obtain cold moudling product (9): the time of sizing of colding pressing will be 30 ~ 90s, and pressure of colding pressing is 6 ~ 10MPa;
F, post processing: cold moudling product (9) are through die-cut, and die-cut pressure is 10 ~ 20MPa, or high pressure waterjet, obtains product noise reduction felt for automobile; If have defective products (7) or clout to produce in steps d ~ f, defective products or clout can carry out shredding again, are then transported in large storehouse (1) again as producing materials.
The volume density of the broken sponge particles of elasticity described in step a is 40 ~ 80kg/m
3, size is 5 ~ 13mm.
The fineness of the thermoplastic fibre of low melting point described in step a is 4 ~ 20 Dtex, and fusing point is 120 ~ 150 DEG C, and length is 30 ~ 60mm.Described low melting point thermoplastic fibre is specially polyethylene fibre, polyester fiber or terylene etc.
The fineness of staple fibre described in step a is 10 ~ 30 Dtex, and length is 30 ~ 60mm.Staple fibre is specially regenerated celulose fibre, cellulose ester fiber, protein fibre and other natural polymer fibres and chemical fibre acrylic fibers, nylon etc.
Volume density: the quality of material in unit volume, units/kg/m
3;
Surface density: the quality of material in unit are, units/kg/m
2.
Tool of the present invention has the following advantages: the present invention directly adopts filament to be that felt produced by raw material, has saved the cost of sheet material in the middle of making; Raw materials most in technical process can repeat to reclaim and use, and is also beneficial to environmental protection while the stock utilization of raising.Its raw material sources are wide, and cost is low, and raw material can be processed by tailing in other productions, reduce further the production cost of product.
The jointing material that the present invention uses is low melting point thermoplastic fibre, and the VOC free generation in process of production of this material, high degree improves the VOC performance of product; The stickiness of goods and plates of automobile is good, improves anti-acoustic capability, also improves comfort simultaneously; Adopt steam cycle to heat, the efficiency of heating surface is high, and safety and environmental protection; Can feed as required.
The present invention, by special conveying, charging pattern, realizes according to shaping profile forms lay raw material, has broken product thickness and depth of cavity to the restriction of product molding, disposablely can produce the complex-shaped and thickness felt product at more than 25mm; Adopt global formation mode, can consider the impact of Total Product thickness on NVH acoustical behavior, the raw material of use can adjust in the larger context, really realize the maximum optimization between quality cost.
Accompanying drawing explanation
Fig. 1 felt pre-shaping mechanism schematic diagram.
Fig. 2 technological process of production schematic diagram.
Description of reference numerals: 1, great Cang, 2, preforming tool, 3, preform, 4, manipulator, 5, Steam Heating mould, 6, semifinished product, 7, defective products, 8, cold pressing forming mould, 9, cold moudling product, 10, feeding unit, 11, great Cang.
Detailed description of the invention
In order to enable the auditor of Patent Office especially the public clearly understand technical spirit of the present invention and useful achievement, applicant will elaborate below by way of example, but be not all the restriction to the present invention program to the description of embodiment, any conceive according to the present invention done be only pro forma but not substantial equivalent transformation and all should be considered as technical scheme category of the present invention.
Embodiment 1
The volume density of design felt product is 60kg/m
3, the raw material needed after calculating mixing is 4.5kg:
A, shredding process: take rayon fibers's element ester fiber 3 parts, regeneration cotton fiber 4 parts, low melting point thermoplastic fibre polyethylene fibre 2.5 parts and the broken sponge particles of elasticity 0.5 part, first shredding process is carried out, the staple fibre of cluster-shaped, regeneration cotton fiber and low melting point thermoplastic fibre are dispersed as fluffy filament, broken for bulk elasticity sponge particles is dispersed as the sponge particles scattered, material after breaing up is sent into a large storehouse 1 and is mixed, and obtains mixed raw material;
B, preformed: take mixed raw material 4.5kg; In preformed storehouse 11, broken up further by step b gained mixed material by feeding unit 10, coordinate the hot blast be blown into bottom preformed storehouse 11, mixed material is sprayed in the preforming tool 2 at top, preformed storehouse 11, and hot blast temperature is 250 DEG C;
The preparation of c, preform: as shown in Figure 1, by the mode of vacuum suction, the raw material of step c gained mixing is adsorbed onto on preforming tool 2 from the bottom to top, by the control to absorption affinity size that size and the arrangement mode of pore on adjustment mould realize, realize zones of different absorption on preforming tool and obtain Different Weight raw material, obtain like this needing the weight of setting, the preform 3 of thickness distribution by production, the time of vacuum suction stone is 60s;
D, melting: preform 3 is transferred in Steam Heating mould 5 by the adsorption jig on manipulator 4; By Steam Heating mould 5 upper and lower mould matched moulds, then the steam of logical 160 ~ 200 DEG C, heats preform 3, keeps temperature 160 ~ 200 DEG C heating 30s, the filament in raw material is melted;
E, mold pressing and sizing of colding pressing: get the raw material after steps d melting and carry out preliminary mold pressing, pressure is 8MPa, and clamp time is 15s, obtain heating semifinished product 6; Heating semifinished product 6 is sent in cold pressing forming mould 8 and carries out cold moudling, obtain cold moudling product 9: the time of sizing of colding pressing is 60s, and pressure of colding pressing is 10MPa;
F, post processing: cold moudling product 9 are through die-cut, and die-cut pressure is 15MPa, or high pressure waterjet, obtains product noise reduction felt for automobile; If have defective products 7 or clout to produce in steps d ~ f, defective products 7 or clout can carry out shredding again, are then transported in large storehouse 1 again as producing materials;
Embodiment 2
The volume density of design felt is 50kg/m
3, the raw material needed after calculating mixing is 3.5kg:
A, shredding process: take staple fibre protein fibre 3 parts, regeneration cotton fiber 4 parts, 2.8 parts, low melting point thermoplastic fibre polyester fiber and the broken sponge particles of elasticity 0.2 part, first shredding process is carried out, the staple fibre of cluster-shaped, regeneration cotton fiber and low melting point thermoplastic fibre are dispersed as fluffy filament, broken for bulk elasticity sponge particles is dispersed as the sponge particles scattered, material after breaing up is sent into a large storehouse 1 and is mixed, and obtains mixed mixed material;
B, preformed: take mixed raw material 3.5kg; In preformed storehouse 11, broken up further by step b gained mixed material by feeding unit 10, coordinate the hot blast be blown into bottom preformed storehouse 11, it is 280 DEG C that mixed material is sprayed hot blast temperature in the preforming tool 2 at top, preformed storehouse 11;
The preparation of c, preform: as shown in Figure 1, by the mode of vacuum suction, the raw material of step c gained mixing is adsorbed onto on preforming tool 2 from the bottom to top, by the control to absorption affinity size that size and the arrangement mode of pore on adjustment mould realize, realize zones of different absorption on preforming tool and obtain Different Weight raw material, obtain like this needing the weight of setting, the preform 3 of thickness distribution by production, the time of vacuum suction stone is 45s;
D, melting: preform 3 is transferred in Steam Heating mould 5 by the adsorption jig on manipulator 4; By Steam Heating mould 5 upper and lower mould matched moulds, then the steam of logical 160 ~ 200 DEG C, heats preform 3, keeps temperature 160 ~ 200 DEG C heating 25s, the filament in raw material is melted;
E, mold pressing and sizing of colding pressing: get the raw material after steps d melting and carry out preliminary mold pressing, pressure is 7.5MPa, and clamp time is 15s, obtain heating semifinished product 6; Heating semifinished product 6 is sent in cold pressing forming mould 8 and carries out cold moudling, obtain cold moudling product 9: the time of sizing of colding pressing is 60s, and pressure of colding pressing is 9MPa;
F, post processing: cold moudling product 9 are through die-cut, and die-cut pressure is 13MPa, or high pressure waterjet, obtains product noise reduction felt for automobile; If have defective products 7 or clout to produce in steps d ~ f, defective products 7 or clout can carry out shredding again, are then transported in large storehouse 1 again as producing materials;
Embodiment 3
The volume density of design felt is 75kg/m
3, the raw material needed after calculating mixing is 6.0kg:
A, shredding process: take staple fibre acrylic fibers 2 parts, regeneration cotton fiber 4 parts, low melting point thermoplastic fibre terylene 3 parts and the broken sponge particles of elasticity 1 part, first shredding process is carried out, the staple fibre of cluster-shaped, regeneration cotton fiber and low melting point thermoplastic fibre are dispersed as fluffy filament, broken for bulk elasticity sponge particles is dispersed as the sponge particles scattered, material after breaing up is sent into a large storehouse (1) and is mixed, and obtains mixed raw material;
B, preformed: take mixed raw material 6.0kg; In preformed storehouse 11, broken up further by step b gained mixed material by feeding unit 10, coordinate the hot blast be blown into bottom preformed storehouse 11, mixed material is sprayed in the preforming tool 2 at top, preformed storehouse 11, and hot blast temperature is 200 DEG C;
The preparation of c, preform: as shown in Figure 1, by the mode of vacuum suction, the raw material of step c gained mixing is adsorbed onto on preforming tool 2 from the bottom to top, by the control to absorption affinity size that size and the arrangement mode of pore on adjustment mould realize, realize zones of different absorption on preforming tool and obtain Different Weight raw material, obtain like this needing the weight of setting, the preform 3 of thickness distribution by production, the time of vacuum suction stone is 80s;
D, melting: preform 3 is transferred in Steam Heating mould 5 by the adsorption jig on manipulator 4; By Steam Heating mould 5 upper and lower mould matched moulds, then the steam of logical 160 ~ 200 DEG C, heats preform 3, keeps temperature 160 ~ 200 DEG C heating 40s, the filament in raw material is melted;
E, mold pressing and sizing of colding pressing: get the raw material after steps d melting and carry out preliminary mold pressing, pressure is 10MPa, and clamp time is 20s, obtain heating semifinished product 6; Heating semifinished product 6 is sent in cold pressing forming mould 8 and carries out cold moudling, obtain cold moudling product 9: the time of sizing of colding pressing is 90s, and pressure of colding pressing is 10MPa;
F, post processing: cold moudling product 9 are through die-cut, and die-cut pressure is 18MPa, or high pressure waterjet, obtains product noise reduction felt for automobile; If have defective products or clout to produce in steps d ~ f, defective products or clout can carry out shredding again, are then transported in large storehouse 1 again as producing materials.
Claims (2)
1. prepare a method for noise reduction felt for automobile, it is characterized in that step is as follows:
A, shredding process: take staple fibre 1 ~ 3 part, regeneration cotton fiber 3 ~ 6 parts, low melting point thermoplastic fibre 2 ~ 3 parts and the broken sponge particles of elasticity 0.2 ~ 1 part, first shredding process is carried out, the staple fibre of cluster-shaped, regeneration cotton fiber and low melting point thermoplastic fibre are dispersed as fluffy filament, and the volume density of breaing up rear fiber is 50 ~ 80kg/m
3, broken for bulk elasticity sponge particles is dispersed as the sponge particles scattered, and the material after breaing up is sent into a large storehouse (1) and is mixed, and obtains mixed raw material;
B, preformed: in preformed storehouse (11), by feeding unit (10), step a gained mixed material is broken up further, coordinate the hot blast that bottom, preformed storehouse (11) is blown into, mixed material is sprayed in the preforming tool (2) at preformed storehouse (11) top, and hot blast temperature is 200 ~ 280 DEG C;
The preparation of c, preform: by the mode of vacuum suction, the raw material of step b gained mixing is adsorbed onto on preforming tool (2) from the bottom to top, by the control to absorption affinity size that size and the arrangement mode of pore on adjustment mould realize, realize zones of different absorption on preforming tool and obtain Different Weight raw material, obtain like this needing the weight of setting, the preform (3) of thickness distribution by production, the time of vacuum suction stone is 60 ~ 90s;
D, melting: preform (3) is transferred in Steam Heating mould (5) by the adsorption jig on manipulator (4); By Steam Heating mould (5) upper and lower mould matched moulds, then the steam of logical 160 ~ 200 DEG C, heats preform (3), keeps temperature 160 ~ 200 DEG C heating 20 ~ 40s, the filament in raw material is melted;
E, mold pressing and sizing of colding pressing: get the raw material after steps d melting and carry out preliminary mold pressing, pressure is 5 ~ 10MPa, and clamp time is 10 ~ 20s, obtain heating semifinished product (6); To heat in semifinished product (6) feeding cold pressing forming mould (8) and carry out cold moudling, obtain cold moudling product (9): the time of sizing of colding pressing will be 30 ~ 90s, and pressure of colding pressing is 6 ~ 10MPa;
F, post processing: cold moudling product (9) are through die-cut, and die-cut pressure is 10 ~ 20MPa, or high pressure waterjet, obtains product noise reduction felt for automobile; If have defective products (7) or clout to produce in steps d ~ f, defective products or clout can carry out shredding again, are then transported in large storehouse (1) again as producing materials;
The volume density of the broken sponge particles of elasticity described in step a is 40 ~ 80kg/m
3, size is 5 ~ 13mm;
The fineness of the thermoplastic fibre of low melting point described in step a is 4 ~ 20 Dtex, and fusing point is 120 ~ 150 DEG C, and length is 30 ~ 60mm.
2. prepare the method for noise reduction felt for automobile as claimed in claim 1, it is characterized in that: the fineness of staple fibre described in step a is 10 ~ 30 Dtex, and length is 30 ~ 60mm.
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| KR101683957B1 (en) * | 2014-01-21 | 2016-12-07 | 현대자동차주식회사 | Apparatus and method for manufacturing multi-layer felt |
| CN104085118B (en) * | 2014-06-11 | 2016-07-06 | 青岛理工大学 | Manufacturing process of embedded co-curing perforated damping film composite material structure |
| CN105058781A (en) * | 2015-08-06 | 2015-11-18 | 成都市新筑路桥机械股份有限公司 | Preparation method of waste rubber particle noise reduction material |
| CN105818402B (en) * | 2016-03-29 | 2018-05-01 | 常熟杉诺柯非织造设备有限公司 | A kind of preparation method of automobile bodies sound insulating pad |
| CN105902045A (en) * | 2016-04-25 | 2016-08-31 | 江苏恒康家居科技股份有限公司 | Polyurethane fiber and polyurethane mixed mattress and preparation method thereof |
| CN108149389A (en) * | 2016-12-05 | 2018-06-12 | 上海新安汽车隔音毡有限公司 | One kind is for the molding improvement mold of deadening felt and its application |
| CN107573672A (en) * | 2017-08-28 | 2018-01-12 | 广德天运新技术股份有限公司 | A kind of environment-friendly type regeneration cotton automotive interior material |
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| CN109483900A (en) * | 2018-09-11 | 2019-03-19 | 上海新安汽车隔音毡有限公司 | A kind of production method of automobile PET superfine fibre part |
| CN109610090A (en) * | 2018-12-07 | 2019-04-12 | 无锡吉兴汽车声学部件科技有限公司 | The production method of sound insulating pad under a kind of blanket car carpeting |
| CN110067083B (en) * | 2019-04-19 | 2020-06-26 | 武汉纺织大学 | Peripheral annular cavity type ventilation die assembly system |
| CN113529268A (en) * | 2020-04-22 | 2021-10-22 | 合肥佩尔哲汽车内饰系统有限公司 | Production method of novel sound insulation felt sheet |
| US20240316838A1 (en) * | 2023-03-23 | 2024-09-26 | Faurecia Interior Systems, Inc. | Vehicle interior panel with non-uniform hardness |
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