CN104890219A - Integral molding method of plasticizing trunk lid of automobile - Google Patents
Integral molding method of plasticizing trunk lid of automobile Download PDFInfo
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- CN104890219A CN104890219A CN201510288192.5A CN201510288192A CN104890219A CN 104890219 A CN104890219 A CN 104890219A CN 201510288192 A CN201510288192 A CN 201510288192A CN 104890219 A CN104890219 A CN 104890219A
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Abstract
The invention relates to an integral molding method of a plasticizing trunk lid of an automobile, and belongs to the technical field of molding. The molding method comprises the following steps: cleaning the inner surface of a die, and coating the inner surface with a die releasing agent; adding raw materials for the plasticizing trunk lid of the automobile to the die, performing die assembly, locking the die so as to form a die cavity, and exerting 0.08-0.12MPa of pressure to the die cavity; mounting the die in a screw plastic molding machine which drives the die to rotate, rotating the die and shifting the rotating die to a heating furnace, and heating the shifted die until the raw materials in the die are heated to be melted and uniformly coated on the inner surface of the die cavity so as to form a trunk lid blank of the automobile; cooling the die, performing die sinking and die release, and taking out the blank after die release so as to obtain the trunk lid finished product of the automobile. The molding method performs an integral molding at a time in the die; the processing technology is simple and feasible; the production efficiency is high; and the production cost is low. The trunk lid is made from a fiber reinforcement modified material, so that the molding method meets the requirements for the strength and the toughness of the trunk lid, and achieves the purpose of light weight of the trunk.
Description
Technical field
The present invention relates to a kind of method plastifying vehicle boot lid global formation, belong to field shaping technique.
Background technology
Traditional vehicle boot lid is that steel plate forms through Sheet Metal Forming Technology manufacture, and the automobile trunk process for making cover obtained by Sheet Metal Forming Technology exists many problems: first, the use of steel plate makes the heavier mass of case cover entirety; Secondly, Sheet Metal Forming Technology and mould limit the contour structures of case cover, and complex-curved being difficult to is formed; In addition, case cover very complicated very from selection to processing and forming technology.Therefore these factors cause the production efficiency of case cover low, and construction profile is single, and manufacturing cost is high.And when automobile tail light or other front lamp of vehicle break down, automobile is easy to have an accident at night running.
Though the vehicle boot lid that prior art light plate obtains has good strength and stiffness, but its weight is larger.The present invention adopts the composite of modified carbon fiber-reinforced resin to replace steel plate global formation to obtain vehicle boot lid, alleviates the quality of vehicle boot lid 40-60%, be equivalent to the 1/3-1/6 of steel plate materials while ensureing enough strength and stiffness.And modified carbon fibre reinforced composite energy-absorbing capacity is in an impact 4-5 times of steel plate or aluminium sheet, has good crashworthiness with the vehicle boot lid that composite of the present invention obtains.
The surface inertness of not surface treated carbon fiber is large, seldom has chemically active functional group, there is more defect in interface, and with the bad adhesion of matrix resin, limit the high performance performance of carbon fiber greatly.Carbon fiber after surface modification treatment improves the surface-active of carbon fiber, improves the caking property of carbon fiber and matrix resin, enhances the interface performance of carbon fiber and matrix material, and then improves the performance of composite.Its surperficial graphite aspect edge larger area oxidation of treated fiber, edge active point quantity increases, and causes rough surface to be more conducive to the bonding with epoxy resin-base, improves the cutting performance of composite.Meanwhile, its surface energy increases, and significantly improves the wellability between carbon fiber and matrix, and contact angle reduces, surface presentation lyophily.In addition, after surface treatment of carbon fibers, having there is the functional groups such as a large amount of hydroxyls, carboxyl, quinones in its surface, improves the polarity of carbon fiber surface, the wetability between enhancing and epoxy resin-base and their bonding degree.
In the method for above-mentioned plasticizing vehicle boot lid global formation, as preferably, the carbon fiber of described surface modification treatment carries out modification by the following method: by long carbon fiber at room temperature first with the nitric acid dousing 10-30min that concentration is 60-68%, then 10-30min is soaked with ionized water, then deionized water rinsing is used, dry 1-2h at 150-180 DEG C, is cut into dried long carbon fiber the carbon fiber that length is 2-3mm.
Beneficial effect of the present invention:
1, the present invention plastifies vehicle boot lid and adopts rotatory molding method, in a mold the Integratively formed case cover getting final product processing structure complexity, and processing technology simple possible, production efficiency is high, and production cost is low.
2, vehicle boot lid of the present invention adopts fiber-reinforced modified process, realizes the light-weighted requirement of case cover while meeting the due intensity of case cover, toughness.
3, the present invention plastifies in vehicle boot lid integral forming method, at mould inner surface coating fluorescent material, improves the security of automobile while raising automobile is attractive in appearance.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose a kind of production cost low, production efficiency is high, and manufacturing process simply plastifies the method for vehicle boot lid global formation, and vehicle boot lid quality is light.
Object of the present invention realizes by following technical proposal: a kind of method plastifying vehicle boot lid global formation, described forming method comprises the steps:
(1) die treatment: by clean for mould inner surface clean, and apply releasing agent;
(2) matched moulds: joined in the mould in step (1) by the raw material of plasticizing vehicle boot lid, matched moulds, forms die cavity with fixture by mold-locked, applies the pressure of 0.08-0.12MPa in die cavity;
(3) first one-step forming: mould is arranged in rotatory molding machine, rotatory molding machine carries out rotation and revolution with mould, mold side is rotated limit and proceeds to heating furnace, the raw material melted by heating be heated in mould is uniformly coated on die cavity inner surface, forms vehicle boot lid base;
(4) cooling forming: along with the rotation of mould, produces heating furnace by mould and enters cooling chamber, cooling die, die sinking, the demoulding, can obtain vehicle boot lid finished product after taking out the finishing of vehicle boot lid base.
Vehicle boot lid of the present invention adopts mould pressing process, not only greatly reduces the quality of vehicle boot lid, also reduce Integral automobile quality, and its construction profile is determined by mould, can according to different demand, and processing has the vehicle boot lid of labyrinth.In addition, whole forming process is that a rotatory molding can obtain finished product in a mold, and production efficiency is high, and production cost is low, and manufacturing process is simple.
In the method for above-mentioned plasticizing vehicle boot lid global formation, as preferably, the mould described in step (1) comprises external mold and internal mold, and described external mold shape is identical with case cover outer wall shape, and internal mold shape is identical with case cover inner wall shape.
In the method for above-mentioned plasticizing vehicle boot lid global formation, as preferably, described external mold comprises external mold main body, outward flange dish, and outward flange rim adventitia main body outline is arranged.Further preferably, the lower boundary of outward flange dish and adventitia body portion profile are at same plane.
In the method for above-mentioned plasticizing vehicle boot lid global formation, as preferably, described internal mold comprises internal mold main body, inner flange, boss, inner flange matches with outward flange dish, inner flange along internal mold main body outline arrange, described inner flange be provided with boss and boss to deviate from internal mold main body outline side protrude.Further preferably, the lower boundary of inner flange and inner membrance body portion profile are at same plane.
Again further preferably, described external mold and internal mold are all also provided with mould bases, and described mould bases is separately positioned on outside internal mold main body and outside external mold main body.
Time shaping, mould bases is connected with rotatory molding machine, and outward flange dish and inner flange lock internal mold and external mold, forms die cavity.Because adventitia inner surface concaves and identical with automobile trunk exterior surface, inner membrance inner surface concaves and identical with automobile trunk interior surface, therefore when the die joint of adventitia and inner membrance is fitted, a hollow structure-i.e. vehicle boot lid shape can be formed, the curtain coating in die cavity that is rotated in by rotatory molding machine after material melts applies, and can form vehicle boot lid after cooling.
In the method for above-mentioned plasticizing vehicle boot lid global formation, as preferably, after applying releasing agent described in step (1), also comprise coating fluorescent material.Fluorescent material adopts common appropriate fluorescent material.The fluorescent material of coating can send fluorescence at night, can point out front vehicle, reduction accident occurrence risk while increase automobile is attractive in appearance.
In the method for above-mentioned plasticizing vehicle boot lid global formation, as preferably, the composite after described plasticizing vehicle boot lid adopts fiber-reinforced modified process is made.
In the method for above-mentioned plasticizing vehicle boot lid global formation, as preferably, described composite comprises the composition of following percentage by weight: epoxy resin 30-60%, polyamide 30-60%, the carbon fiber 10-20% of surface modification treatment.
Accompanying drawing explanation
Fig. 1 is the explosive view that the present invention plastifies mould therefor in vehicle boot lid integral forming method.
Fig. 2 is the partial sectional view of B-B in Fig. 1.
In figure, 1, mould bases; 2, inner flange; 3, boss; 4, internal mold; 5, external mold; 6, outward flange dish.
Detailed description of the invention
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
Embodiment 1
Plastify a method for vehicle boot lid global formation, described forming method comprises the steps:
Die treatment: by clean for mould inner surface clean, and apply releasing agent;
Matched moulds: joined in the mould in step (1) by the raw material of plasticizing vehicle boot lid, matched moulds, forms die cavity with fixture by mold-locked, applies the pressure of 0.10MPa in die cavity; Described raw material is the composite after fiber-reinforced modified process, comprises the composition of following percentage by weight: epoxy resin 40%, polyamide 45%, the carbon fiber 15% of surface modification treatment; Wherein, the carbon fiber of described surface modification treatment carries out modification by the following method: by long carbon fiber at room temperature first with the nitric acid dousing 25min that concentration is 63%, then 15min is soaked with ionized water, then deionized water rinsing is used, dry 2h at 170 DEG C, is cut into dried long carbon fiber the carbon fiber that length is 3mm;
First one-step forming: be arranged on by mould in rotatory molding machine, rotatory molding machine carries out rotation and revolution with mould, mold side is rotated limit and proceeds to heating furnace, is heated to the raw material melted by heating even spread die cavity inner surface in mould, forms vehicle boot lid base;
Cooling forming: along with the rotation of mould, produces heating furnace by mould and enters cooling chamber, cooling die, die sinking, the demoulding, can obtain vehicle boot lid finished product after taking out the finishing of vehicle boot lid base.
Embodiment 2
Plastify a method for vehicle boot lid global formation, described forming method comprises the steps:
Die treatment: by clean for mould inner surface clean, and apply releasing agent;
Matched moulds: joined in the mould in step (1) by the raw material of plasticizing vehicle boot lid, matched moulds, forms die cavity with fixture by mold-locked, applies the pressure of 0.11MPa in die cavity; Described raw material is the composite after fiber-reinforced modified process, comprises the composition of following percentage by weight: epoxy resin 50%, polyamide 35%, the carbon fiber 15% of surface modification treatment; Wherein, the carbon fiber of described surface modification treatment carries out modification by the following method: by long carbon fiber at room temperature first with the nitric acid dousing 20min that concentration is 65%, then 20min is soaked with ionized water, then deionized water rinsing is used, dry 1h at 160 DEG C, is cut into dried long carbon fiber the carbon fiber that length is 2mm;
First one-step forming: mould is arranged in rotatory molding machine, rotatory molding machine carries out rotation and revolution with mould, mold side is rotated limit and proceeds to heating furnace, be heated to the raw material melted by heating in mould, and be uniformly coated on die cavity inner surface under the influence of centrifugal force, form vehicle boot lid base;
Cooling forming: along with the rotation of mould, produces heating furnace by mould and enters cooling chamber, at cooling chamber Raw cooling forming, rotatory molding machine forwards die sinking position to, and mould stops the rotation, and unclamps rear mold fixture, the demoulding, takes out global formation and obtains vehicle boot lid finished product.
Embodiment 3
Plastify a method for vehicle boot lid global formation, described forming method comprises the steps:
Die treatment: by clean for mould inner surface clean, and apply common appropriate releasing agent and fluorescent material successively;
Matched moulds: joined in the mould in step (1) by the raw material of plasticizing vehicle boot lid, matched moulds, forms die cavity with fixture by mold-locked, applies the pressure of 0.12MPa in die cavity; Described raw material is the composite after fiber-reinforced modified process, comprises the composition of following percentage by weight: epoxy resin 60%, polyamide 30%, the carbon fiber 20% of surface modification treatment; Wherein, the carbon fiber of described surface modification treatment carries out modification by the following method: by long carbon fiber at room temperature first with the nitric acid dousing 30min that concentration is 60%, then 10min is soaked with ionized water, then deionized water rinsing is used, dry 1h at 180 DEG C, is cut into dried long carbon fiber the carbon fiber that length is 3mm;
First one-step forming: mould is arranged in rotatory molding machine, rotatory molding machine carries out rotation and revolution with mould, mold side is rotated limit and proceeds to heating furnace, be heated to the raw material melted by heating in mould, and be uniformly coated on mould inner surface under the influence of centrifugal force, middle formation hollow structure, forms vehicle boot lid goods;
Cooling forming: along with the rotation of mould, produces heating furnace by mould and enters cooling chamber, cooling die, die sinking, the demoulding, can obtain vehicle boot lid finished product after taking out the finishing of vehicle boot lid base.
Embodiment 4
Plastify a method for vehicle boot lid global formation, described forming method comprises the steps:
Die treatment: by clean for mould inner surface clean, and apply common appropriate releasing agent and fluorescent material successively;
Matched moulds: joined in the mould in step (1) by the raw material of plasticizing vehicle boot lid, matched moulds, forms die cavity with fixture by mold-locked, applies the pressure of 0.08MPa in die cavity; Described raw material is the composite after fiber-reinforced modified process, comprises the composition of following percentage by weight: epoxy resin 40%, polyamide 40%, the carbon fiber 20% of surface modification treatment; Wherein, the carbon fiber of described surface modification treatment carries out modification by the following method: by long carbon fiber at room temperature first with the nitric acid dousing 10min that concentration is 68%, then 30min is soaked with ionized water, then deionized water rinsing is used, dry 2h at 150 DEG C, is cut into dried long carbon fiber the carbon fiber that length is 2mm;
First one-step forming: mould is arranged in rotatory molding machine, rotatory molding machine carries out rotation and revolution with mould, mold side is rotated limit and proceeds to heating furnace, the raw material melted by heating be heated in mould is uniformly coated on die cavity inner surface, forms vehicle boot lid base;
Cooling forming: along with the rotation of mould, produces heating furnace by mould and enters cooling chamber, at cooling chamber Raw cooling forming, rotatory molding machine forwards die sinking position to, and mould stops the rotation, and unclamps rear mold fixture, the demoulding, takes out global formation and obtains vehicle boot lid finished product.
As shown in Figure 1-2, in plasticizing vehicle boot lid integral forming method, mould used comprises external mold 5 and internal mold 4, and external mold 5 comprises external mold main body, outward flange dish 6, and outward flange dish 6 is arranged along adventitia main body outline.Further preferably, the lower boundary of outward flange dish 6 and adventitia body portion profile are at same plane.
Internal mold 4 comprises internal mold main body, inner flange 2, boss 3, and inner flange 2 matches with outward flange dish 6, inner flange 2 along internal mold main body outline arrange, inner flange 2 be provided with boss 3 and boss 3 to deviate from internal mold main body outline side protrude.Further preferably, the lower boundary of inner flange 2 and inner membrance body portion profile are at same plane.
Again further preferably, external mold 5 and internal mold 4 are all also provided with mould bases 1, and mould bases 1 is separately positioned on outside internal mold main body and outside external mold main body.
Time shaping, mould bases is connected with rotatory molding machine, and outward flange dish and inner flange lock internal mold and external mold, forms die cavity.Because adventitia inner surface concaves and identical with automobile trunk exterior surface, inner membrance inner surface concaves and identical with automobile trunk interior surface, therefore when the die joint of adventitia and inner membrance is fitted, a hollow structure-i.e. vehicle boot lid shape can be formed, the curtain coating in die cavity that is rotated in by rotatory molding machine after material melts applies, and can form vehicle boot lid after cooling.
Vehicle boot lid obtained in embodiment 1-4 and commercially available steel plate vehicle boot lid are compared, result is as shown in table 1.
Table 1: in embodiment 1-4 and the performance comparison result of commercially available vehicle boot lid
In sum, the present invention plastifies the processing technology simple possible of vehicle boot lid forming method, production efficiency is high, production cost is low, adopt rotatory molding method, the Integratively formed case cover getting final product processing structure complexity in a mold, and adopt the composite after fiber-reinforced modified process to make, while meeting the due intensity of case cover, toughness, realize the light-weighted requirement of case cover.In addition, mould inner surface coating fluorescent material, improves the security of automobile while raising automobile is attractive in appearance.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (10)
1. plastify a method for vehicle boot lid global formation, it is characterized in that, described forming method comprises the steps:
(1) die treatment: by clean for mould inner surface clean, and apply releasing agent;
(2) matched moulds: joined in the mould in step (1) by the raw material of plasticizing vehicle boot lid, matched moulds, forms die cavity by mold-locked, applies the pressure of 0.08-0.12MPa in die cavity;
(3) first one-step forming: be arranged on by mould in rotatory molding machine, rotatory molding machine rotates with mould, mold side is rotated limit and proceeds to heating furnace, and the raw material melted by heating be heated in mould is uniformly coated on die cavity inner surface, forms vehicle boot lid base;
(4) cooling forming: cooling die, die sinking, the demoulding, can obtain vehicle boot lid finished product after taking out the finishing of vehicle boot lid base.
2. plastify the method for vehicle boot lid global formation according to claim 1, it is characterized in that, mould described in step (1) comprises external mold and internal mold, and described external mold comprises external mold main body, outward flange dish, and outward flange rim adventitia main body outline is arranged.
3. plastify the method for vehicle boot lid global formation according to claim 2, it is characterized in that, the lower boundary of outward flange dish and adventitia body portion profile are at same plane.
4. plastify the method for vehicle boot lid global formation according to claim 2, it is characterized in that, described internal mold comprises internal mold main body, inner flange, boss, inner flange along internal mold main body outline arrange, described inner flange be provided with boss and boss to deviate from internal mold main body outline side protrude.
5. plastify the method for vehicle boot lid global formation according to claim 4, it is characterized in that, the lower boundary of inner flange and inner membrance body portion profile are at same plane.
6. according to claim arbitrary in claim 2-5, plastify the method for vehicle boot lid global formation, it is characterized in that, described external mold and internal mold are all also provided with mould bases, and described mould bases is separately positioned on outside internal mold main body and outside external mold main body.
7. plastify the method for vehicle boot lid global formation according to claim 1, it is characterized in that, after applying releasing agent described in step (1), also comprise coating fluorescent material.
8. plastify the method for vehicle boot lid global formation according to claim 1, it is characterized in that, the composite after described plasticizing vehicle boot lid adopts fiber-reinforced modified process is made.
9. plastify the method for vehicle boot lid global formation according to claim 8, it is characterized in that, described composite comprises the composition of following percentage by weight: epoxy resin 30-60%, polyamide 30-60%, the carbon fiber 10-20% of surface modification treatment.
10. plastify the method for vehicle boot lid global formation according to claim 9, it is characterized in that, the carbon fiber of described surface modification treatment carries out modification by the following method: by long carbon fiber at room temperature first with the nitric acid dousing 10-30min that concentration is 60-68%, then 10-30min is soaked with ionized water, then deionized water rinsing is used, dry 1-2h at 150-180 DEG C, is cut into dried long carbon fiber the carbon fiber that length is 2-3mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510288192.5A CN104890219A (en) | 2015-05-29 | 2015-05-29 | Integral molding method of plasticizing trunk lid of automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510288192.5A CN104890219A (en) | 2015-05-29 | 2015-05-29 | Integral molding method of plasticizing trunk lid of automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108623970A (en) * | 2018-05-21 | 2018-10-09 | 芜湖创科新材料科技有限公司 | A kind of automobile peripheral board ASA modified material preparation processes |
| CN112157925A (en) * | 2020-08-11 | 2021-01-01 | 共慧冶金设备科技(苏州)有限公司 | Preparation device and preparation method of carbon fiber reinforced thermoplastic resin composite material |
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| JP2002059478A (en) * | 2000-08-21 | 2002-02-26 | Kawasaki Heavy Ind Ltd | Molding method and device |
| CN101343409A (en) * | 2008-08-27 | 2009-01-14 | 毛惠敏 | Carbon fiber reinforced composite and preparation thereof |
| CN103057105A (en) * | 2011-10-21 | 2013-04-24 | 广州健恩医疗设备有限公司 | Plastic molding equipment |
| CN103707937A (en) * | 2013-12-12 | 2014-04-09 | 北京化工大学 | Plasticized car body overall-molding method |
| CN103727203A (en) * | 2013-12-30 | 2014-04-16 | 石家庄中煤装备制造股份有限公司 | Composite gear and gear shaft |
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2015
- 2015-05-29 CN CN201510288192.5A patent/CN104890219A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002059478A (en) * | 2000-08-21 | 2002-02-26 | Kawasaki Heavy Ind Ltd | Molding method and device |
| CN101343409A (en) * | 2008-08-27 | 2009-01-14 | 毛惠敏 | Carbon fiber reinforced composite and preparation thereof |
| CN103057105A (en) * | 2011-10-21 | 2013-04-24 | 广州健恩医疗设备有限公司 | Plastic molding equipment |
| CN103707937A (en) * | 2013-12-12 | 2014-04-09 | 北京化工大学 | Plasticized car body overall-molding method |
| CN103727203A (en) * | 2013-12-30 | 2014-04-16 | 石家庄中煤装备制造股份有限公司 | Composite gear and gear shaft |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108623970A (en) * | 2018-05-21 | 2018-10-09 | 芜湖创科新材料科技有限公司 | A kind of automobile peripheral board ASA modified material preparation processes |
| CN112157925A (en) * | 2020-08-11 | 2021-01-01 | 共慧冶金设备科技(苏州)有限公司 | Preparation device and preparation method of carbon fiber reinforced thermoplastic resin composite material |
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