CN87102543A - Full carrying all-plastic automobile vehicle body and manufacture method thereof - Google Patents
Full carrying all-plastic automobile vehicle body and manufacture method thereof Download PDFInfo
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- CN87102543A CN87102543A CN87102543.4A CN87102543A CN87102543A CN 87102543 A CN87102543 A CN 87102543A CN 87102543 A CN87102543 A CN 87102543A CN 87102543 A CN87102543 A CN 87102543A
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The full carrying integral automobile vehicle body and the manufacture method thereof of a kind of high strength, light composite material.Unit body is bonded by body top section and body bottom section.Body top section is to be bonded by the housing ectonexine that the sticking glass fabric on inside and outside mould molding face upper berth is made; Body bottom section is to wrap up the glass fabric that has soaked into epoxy resin to make on the inner tube of a tyre of composite foam material system.Be embedded with the connector that is used for fixing other assemblies of automobile at body top section and bottom.
Description
The present invention relates to a kind of high strength, the full carrying integral automobile vehicle body and the manufacture method thereof of light composite material.On this integral automobile vehicle body, give and be embedded with the connector that is used to connect other each assemblies of automobile.
Auto body is generally formed by the steel plate compacting.In recent years,, use plastics and composite material on the automobile and make the more and more of member, for example: with semi-hard polyurethane foam plastic and polyvinylchloride manufacturing direction dish, gauge panel, face post, ceiling etc. along with developing rapidly of engineering plastics and composite material; Adopt the modified rigid polyurethane plastics to make bumper/spoiler, make backplate with modification ABC plastics; Make car door with the smc laminated plastics, make spring plate and turning cylinder etc. with the carbon fiber glass-felt plastic, also useful plastics or composite material are made unit body, but because material cost height, processed complex, so, up to the present, seldom have plastics or composite material carry unit body entirely and put on market, its major cause has several, 1. vehicle body plastics or composite material, especially unitary body, its intensity and impact resistance are generally not ideal enough, and 2. its cost is higher than the automobile of Iron and Steel Production, 3. the vehicle body of plastics or composite material is not ideal enough with connecting of other assemblies of automobile.So, in light weight although the unit body that composite material is made has, advantage such as oil consumption is low, but can not replace iron and steel and carry out Quantity production.
The applicant once proposed a kind of auto body and manufacture method thereof of full bearing composites, in the method, with be at least one deck soaked into the glass fabric of epoxy resin and at least one deck soaked into the glass fabric of polyester, all overlap joint wraps the automobile inner tube model of being made by composite foam material respectively, makes the composite material unitary body therefrom.Because in process of production, each layer soaked into the glass fabric of polyester or epoxy resin in solidification process, the generation contraction has produced vehicle body integral body and gives stress, so it is low that it not only has a cost, lightweight characteristics, also has the intensity height especially, the considerable part that anti-impact force is strong.
But, this automobile has run into some problems in batch manufacturing: on the one hand its manufacturability is poor, because what use in the course of processing is mold rather than mould, so the working accuracy of vehicle body is low, surface finish is bad, and makes the appearance property of vehicle body not ideal enough; In addition, owing to there is a large amount of handwork in the course of processing, each car size all can not be identical, so, make full plastic vehicle body and other each assemblies, as, car door, the connection of parts such as driving engine can not be very accurate, and its interchangeability is poor.This has the unit body that the gives stress batch manufacturing that has high input and has some difficulties with regard to making.
Purpose of the present invention will address this problem exactly.The invention provides the integral automobile vehicle body that a kind of composite material is made, this vehicle body is the intensity height not only, strong shock resistance, and have good surface appearance and desirable interchangeability, thereby vehicle body is produced in enormous quantities, satisfying customer requirement becomes possibility.
The present invention has also solved the concrete grammar of making this vehicle body, simultaneously automotive engine, suspension system have also been solved in this unit body, wait the location and installation problem of each parts, make the batch manufacturing of the unit body automobile of composite material become possibility like this with putting on market.
Method of the present invention is exactly that vehicle body is divided into two parts processing, and first is called body top section, and it is the composite-material body shell of being made by mould; Second portion is called body bottom section, and it is to have a whole crossbeam that gives stress by what composite material was made, body top section and body bottom section is sticked together again, thereby has constituted complete vehicle body.
When processing unit body top, adopted inner mold and outer mold, make inner casing and shell that shape is complementary respectively, matched moulds makes up the bonding complete body top section that becomes then.When the processing body top section, should give at suitable position and bury connector.When the processing body bottom section, the inner tube of a tyre model that adopts composite foam material to make, again will be at least one deck soaked into the glass fabric of epoxy resin and at least one deck glass fabric of having soaked into polyester all overlap respectively and wrap this inner tube of a tyre model, and give at suitable position and to bury connector, have the whole crossbeam that gives stress and constitute.
Again body top section and body bottom section are sleeved on together, use the slit of the joint portion of foamed fibre resin glue filling body top section and body bottom section, just formed complete vehicle body after the curing with good appearance.
The present invention makes to have the body bottom section that gives stress and combines with the body top section of mould-manufacturing, not only make whole vehicle body have the intensity height, in light weight, durable in use, also to have possessed body contour simultaneously attractive in appearance with the low advantage of cost, the characteristics of good manufacturability are suitable for the production in enormous quantities of all-plastic automobile.
The present invention will be described in more detail below with reference to accompanying drawing.
Fig. 1 is the composite material unit body vertical profile scheme drawing that is bonded by the vehicle body upper and lower part.
Fig. 2 is the schematic cross section of Fig. 1.
Fig. 2 A is the local enlarged diagram of Fig. 2 joint portion A.
Fig. 3 is the lateral plan of body top section.
Fig. 4 is the end elevation of body top section.
Fig. 5 is the lateral plan (analysing and observe) of body bottom section.
Fig. 6 is the end elevation (analysing and observe) of body bottom section.
Fig. 7 body bottom section gives and buries the connector scheme drawing.
Fig. 8 body top section gives and buries the connector scheme drawing.
Employed glass fabric generally is neutral, dewaxing, and its thickness should not be too thick, in general, thickness between 0.1 to 0.5 millimeter, preferably 0.25 millimeter.
It is not only in light weight to make the employed composite foam material of body bottom section (promptly being processed into the material of inner tube of a tyre model), and will be easy to processing, and material is flexible, and price is low, generally can select polystyrene foam plate or hard polyurethane foams for use.Its capacity can be about 25 kilograms/cubic meter.
The thickness of composite foam material can change according to application site is different, and in general, its thickness is within 10 to 500 millimeters, and most cases is that about 50 millimeters thick are just passable.
The manufacture method of giving stress composite material body bottom section (seeing 2 among Fig. 5, Fig. 6) is as follows:
At first, composite foam material shape on demand is processed into inner tube of a tyre model.In small batch production, the method for available processing wooden mold is made each parts of required form with cystosepiment, and then with adhesives each sheet material is pieced together and to be sticked into needed global shape.In production in enormous quantities, available injection moulding, one-shot forming is needed shape.
Will wrap up this inner tube of a tyre model by different level, fully with glass fabric then.
It is suitable that glass fabric will be cut out, and is complementary with corresponding inner tube of a tyre model.In epoxy resin solution, soak into then.Wherein epoxy resin will dilute, and will add curing agent in this solution simultaneously, if adopt second diamino curing agent, then the ratio of second diamino and epoxy resin should be about 1: 10, and is proper.
The glass fabric that will soak into epoxy resin is topped on inner tube of a tyre model, is that scrub-brush more than 6 centimetres is flat with glass fabric brush with width.This is the ground floor glass fibre, must wrap inner tube of a tyre model all, equably, wherein will note the overlap of glass woven fabric especially, is proof strength, and the width of its overlap can not be less than 50 millimeters.After about 3 hours,, it is had an even surface with the rubber cylinder glass fabric of roll extrusion semi-solid preparation equably.This glass fabric that soaks into epoxy resin is wanted topped one deck at least.If topped two layers, then about 36 hours in the topped back of ground floor, after glass-felt plastic solidifies, the topped again second layer.
To soak into polyester again, cut out suitable glass fabric as stated above mutually overlap joint and all, topped on ground floor (or which floor) glass fabric equably, its lap width can not be less than 50 millimeters.The glass fabric that soaks into polyester is wanted more than topped one deck, in the end one deck topped after, approximately after 48 hours, the alkide resin glass-felt plastic has just solidified, and does the surface then and handles.
Be the first method of making composite material above.Second method and first kind are similar, and its main difference point is: at first the epoxy resin that modulates is sprayed equably or brush on foam inner tube of a tyre model (wherein also will mix curing agent in the epoxy resin).After about 20 minutes, when epoxy resin also has cooresponding viscosity, ground floor glass fabric two ends are evened up, steadily shakedown is multiple on foam inner tube of a tyre model, and is flat with dried brush brush, and promptly all model encased with glass fabric.Wherein also to interlock between every cloth and put up at least 50 millimeters, on the ground floor glass fabric, spray again then or brush epoxy resin solution, make this solution soak into the glass fibre layer of cloth, after about 20 minutes, repave multiple second layer glass fabric with said method.Again in the method for cover glass fiber cloth, its glass fabric is wanted two layers at least behind spary epoxy resin.After treating that needed level shop answer, need about 36 hours curing, and then polyester sprayed or brush on above-mentioned glass-felt plastic, after about 20 minutes, the multiple upper glass fiber layer of cloth in shop, its method and main points and spary epoxy resin similar, but to spread the layer glass fiber cloth at least, just on polyester layer, also to spread multiple layer of glass cloth, and then spary one deck polyester, treat that each layer all spread multiple, parcel and finished after, to pass through about 48 hours curing, and then do the surface and handle.
Because of every layer of glass fabric that has soaked into epoxy resin or polyester in solidification process, produce 8/1000ths contraction and make this member produce prestressed tension.
In aforesaid operations, the lap width between the glass fabric is all more than 50 millimeters, and the ambient temperature of operation will be higher than 25 ℃, and air themperature will be lower than 70%.
Body top section (see among Fig. 3, Fig. 4 1) manufacture method is as follows:
The every interior forming surface of making the external mold of body top section housing is carried out polishing, makes its forming surface degree of finish reach △ more than 10:
Then demoulding wax is melted under 37 ℃ of temperature, the demoulding wax of fusing is spread upon on the mould molding face uniformly, after demoulding wax solidifies (about 15 minutes), erase with the demoulding wax that cloth will solidify, repeat to smear the operation five times of demoulding wax, demoulding wax is penetrated in the slit of mould glass fibre fully;
After above-mentioned operation is finished, the liquid mold release is sprayed on the mould molding face that scribbles demoulding wax, its coat thickness is about 0.01mm, and the liquid mold release repeats to spray twice;
After the abundant drying of liquid mold release, uniformly spray one deck gel coat solution thereon, to mix mill base according to selected body color in the gel coat solution, the weight of mill base accounts for 10%～20% of gel coat total solution weight.The coat thickness of gel coat is about 0.6mm, and the gel coat after the spraying will solidify about two hours;
Multiple one deck is cut out suitable Blanket (or glass fabric) on the mould molding face upper berth that the gel coat coating is arranged, for the ease of carrying out the bonding of car shell each several part when the matched moulds, each limit of Blanket is less than the about 20mm of die edge, and the thickness of Blanket is about 0.2～1mm;
Pour into a mould alkide resin (or unsaturated polyester) then thereon uniformly, and with the aluminum jugged rolling wheel with the sufficient flattening-out of the alkide resin on the Blanket, alkide resin is soaked in the slit of Blanket uniformly, (will add curing agent in the alkide resin).
According to required thickness, with layer of glass cloth shop is multiple on the Blanket of abundant flattening-out at least, pour into a mould polyester (or unsaturated polyester) and flat thereon with the brush brush, eliminate its bubble, repeat this step till reaching desired thickness.
Through 24～36 hours curing, just made the skin of certain part of this body top section.
On outer forming surface corresponding to above-mentioned car shell internal mold partly, repeat above-mentioned whole operating process, make the internal layer of this car shell part;
On the faying face of car shell ectonexine, and the joint portion place mat glass fabric of every housing and being coated with alkide resin, the interior external mold that will have this car shell ectonexine then is involutory, with bolt that the mounting flange on the interior external mold is fastening, make body top section (1) become as a whole, solidify more than 24 hours;
Press first external mold, the order stripping of back internal mold then;
After the demoulding, the surface is done in the junction handle polishing, japanning, glazing.
The associated methods of body top section (1) and body bottom section (2) following (seeing Fig. 1, Fig. 2):
With the molded body top section (1) that fully solidifies with give stress body bottom section (2) and be sleeved on together, the design of body top section (1) and body bottom section (2), should guarantee that these two parts are chimeric fully at the junction surface potential energy, but leave gap about 8mm in its face of joint edge;
With the foamed fibre resin glue (13) of formulated, be filled in the slit of body top section (1) and body bottom section (2) joint and (see Fig. 2-A), make body top section (1) and body bottom section (2) can glue force together, and to solidify fully.
The compound method of the foamed fibre resin glue (13) of above-mentioned formulated is, by its shared volume, polyester (band curing agent) is 30%, silica flour is 20%, the polystyrene foam of pulverizing 35%, glass fibre element (more than the length 100mm) is 15%, with the fusion in proportion of various compositions, stir, and this resin glue should use after preparing immediately.
It is as follows that connector gives the method for burying:
On some position of body top section (1) and body bottom section (2), be useful on the connector that each assemblies and parts of automobile (as: driving engine, front and back bridge, car door, fuel tank etc.) is installed, as bolt hole, hook, hanger etc., these connectors employings are given the method for burying and are fixed on the vehicle body, it gives and buries operation and all carry out in the process of making body top section, bottom, and it specifically gives, and to bury step as follows:
For body bottom section (2) (see figure 7) of giving stress is arranged: need give a side of the connector (4) (nut, hook, hanger etc.) that buries at each, the steel plate (3) of a certain size of welding, this steel plate (3) thickness is generally 1mm, and its shape is wanted to conform to the vehicle body shape of giving the place of burying; Its steel plate (3) size should be: if bearing capacity is 1kg, and under connector (4) resistance to compression situation, its steel plate (3) area 〉=1cm
2; Under connector (4) tension situation, its steel plate (3) area 〉=3cm
2; Steel plate (3) need be through processing of rust removing.
Steel plate (3) welding method is, is to weld towards a side of vehicle body (2) at each connector (4), should make the be subjected to force direction of steel plate (3) plane perpendicular to connector (4).
Wrapping up the giving on stress body bottom section (2) member of plurality layers of glass fiber cloth (5), giving earlier determining to give and bury the position with jig;
Steel plate (3) outside that will be welded on each connector (4) is coated with fibre resin glue (6) thick more than the 1mm, and (or epoxy atom glue) sticks on steel plate (3) and gives on the vehicle body (2) of reserving the position earlier.
After treating that fibre resin (6) fully solidifies, again will be at least one deck soak into epoxy resin or polyester, and at the glass fabric (7) of locating to leave opening corresponding to connector (4), wrap up body bottom section (2) member successively, connector (4) is exposed from the opening part of glass fabric (7), glass fabric (7) should cover steel plate (3) fully, and connector (4) is exposed.
Body top section (1) give the method for burying and the different (see figure 8)s of body bottom section (2), when making body top section (1) inner casing, begin to give and bury,
On the mould molding face, spread and glued plurality layers of glass fiber cloth (8) afterwards, give determining earlier to give with jig and bury the position, the steel plate (10) of appropriate size is bonded on this position with fibre resin glue (or epoxy atom glue) (9), the thickness of its light plate (10) is about 4mm, the shape of steel plate (10) is wanted and the inner casing mould at this place adapts, the size of steel plate (10) can be given the method for burying with reference to foregoing body bottom section (2), be 1kg both as bearing capacity, according to connector pressurized or pulled condition, its steel plate (10) area is 1～3cm
2;
Proceed to spread the operation of multiple glass fabric (11) and cast alkide resin then;
After the vehicle body demoulding, giving on the appropriate location of burying steel plate (10), punch and the hitch operation.
Composite material automobile body is in light weight, is 1/3rd of the own weight of general iron structure, so the consumption of fuel of automobile can reduce; The intensity height, the strength and stiffness conditionally complete with the unitized frame that gives stress satisfies the requirement of automobile itself; Cost is low, can see from above-mentioned material and manufacture method, selected base stock price is all lower, manufacture method is easy, need not wide place and complex apparatus, general little factory all has the ability to bear, this vehicle body sound insulation, heat insulation good, no burn into is repaired easily, has higher utility.
Under the prerequisite of spirit of the present invention, also can make all kinds of ships, yacht, furniture, container etc. with this composite material.Purposes is more extensive.
Claims (11)
1, the full carrying integral automobile vehicle body made of a kind of composite material, it is characterized in that, the body bottom section that gives stress is adhered to one another to be formed this vehicle body together by composite molded unit body top with by having of making of composite material, and this unit body gives and be embedded with the connector that is used for fixing other assemblies of automobile.
2, the described full bearing automobile vehicle body of claim 1 is characterized in that: body top section is to be formed by sticking pressure of the inside and outside shell matched moulds of making on the mould molding face.
3, the described full bearing automobile vehicle body of claim 1 is characterized in that: body bottom section be by one deck at least soaked into the glass fabric of epoxy resin and at least one deck soaked into polyester glass fabric successively all the inner tube of a tyre model of overlap joint parcel composite foam material system form.
4, claim 1,2 described full bearing automobile vehicle bodies is characterized in that: at some position of body top section, give being embedded with the connector that is used for fixing other assemblies of automobile.
5, claim 1,3 described full bearing automobile vehicle bodies is characterized in that: some position of body bottom section, give being embedded with the connector that is used for fixing other assemblies of automobile.
6, the described a kind of full bearing automobile vehicle body of claim 1～3 is characterized in that: auto body is to be bonded together with the foamed fibre resin glue of formulated by body top section and body bottom section to constitute.
7, a kind of composite material carries the manufacture method of unit body entirely, it is characterized in that, body top section is bonding the making of housing ectonexine matched moulds of being made by the sticking glass fabric on inside and outside mould molding face upper berth; Body bottom section is to wrap up the glass fabric that has soaked into epoxy resin to make on the inner tube of a tyre that composite foam material is made; Unit body is bonding and make by body top section and body bottom section.In the process of making body top section and body bottom section, give being embedded with the connector that is used to connect other each assemblies of automobile.
8, the manufacture method of the described a kind of full bearing composites unit body of claim 7, it is characterized in that: the manufacturing step of its body bottom section comprises:
Composite foam material is made the inner tube of a tyre of required form;
At least one deck glass fabric that will soak into epoxy resin all overlaps and wraps inner tube of a tyre model, and is flat with the brush brush;
On after the curing, the glass fabric that will soak into polyester is all topped, be wrapped in ground floor (or the which floor) glass fabric;
Needs are given the connector that buries to be welded on the suitable steel plate of shape and size;
Steel plate is bonded at the appropriate position of body bottom section with fibre resin glue;
After treating that fibre resin glue fully solidifies, continue shop multiple one deck at least and soaked into epoxy resin or polyester, and leave the glass fabric of opening at corresponding connector place, complete topped steel plate exposes connector;
After treating curable polyester, body bottom section is carried out surface treatment.
9, the manufacture method of the described a kind of full bearing composites unit body of claim 7 is characterized in that: its body top section manufacturing step comprises:
The vehicle body shape of Zhi Zaoing prepares the inside and outside mould on unit body top on demand,
With inside and outside mould molding mirror polish;
On forming surface, smear demoulding wax;
Spraying liquid mold release;
The gel coat of mill base is mixed in spraying;
The multiple suitable Blanket (or cloth) of size in shop;
Go up the cast alkide resin at Blanket (or cloth), flat with the brush brush;
Give the position of burying connector at needs, the steel plate that shape and size are suitable is located at this with the fibre resin glue bond;
Continuation on the steel plate upper berth again at least one deck soaked into the glass fabric of polyester;
Behind the curable polyester resin, on the inside and outside shell face of joint and the joint portion place mat glass fabric of every housing, and be coated with alkide resin;
With inside and outside mould matched moulds;
After waiting to solidify, the demoulding;
Surfaces externally and internally to vehicle body carries out surface treatment, polishing, japanning, glazing;
To giving steel plate punching and the hitch that buries.
10, the manufacture method of the described a kind of full bearing composites unit body of claim 7, it is characterized in that: the adhesion step of its body top section and body bottom section comprises:
Body top section and body bottom section are sleeved on together;
With the foamed fibre resin glue, be filled in the slit, junction surface of vehicle body upper and lower part;
Abundant curing is also done the surface to the junction surface and is handled.
11, the manufacture method of the full carrying unit body described in the claim 7 is characterized in that: the various composition of the foamed fibre resin glue institute accounting part that is used for bonding body top section and body bottom section is: polyester (band curing agent) 30%; Silica flour 20%; The polystyrene foam of pulverizing 35%; Glass fibre element (more than the length 100mm) is 15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87102543.4A CN1003924B (en) | 1987-04-02 | 1987-04-02 | Full load-carrying and full plastic automobile body and manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87102543.4A CN1003924B (en) | 1987-04-02 | 1987-04-02 | Full load-carrying and full plastic automobile body and manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87102543A true CN87102543A (en) | 1988-10-12 |
| CN1003924B CN1003924B (en) | 1989-04-19 |
Family
ID=4814013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87102543.4A Expired CN1003924B (en) | 1987-04-02 | 1987-04-02 | Full load-carrying and full plastic automobile body and manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003924B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103192480A (en) * | 2012-01-05 | 2013-07-10 | 应革 | One-time forming process of plastic vehicle body with built-in steel net and aluminum frame |
| CN103707937A (en) * | 2013-12-12 | 2014-04-09 | 北京化工大学 | Plasticized car body overall-molding method |
| CN106584925A (en) * | 2016-11-29 | 2017-04-26 | 上海晋飞碳纤科技股份有限公司 | Integrally-formed, flame-retardant and high-strength roof board of high-speed railway carriage and forming process of roof |
| CN108349544A (en) * | 2015-08-31 | 2018-07-31 | 戴弗根特技术有限公司 | System and method for vehicles sub-component and making |
| CN108501274A (en) * | 2017-02-27 | 2018-09-07 | 丹阳市金业来车辆装饰件有限公司 | A kind of production technology of class-A surfaces fiber reinforcement polyurethane hard decorative part |
| CN108791517A (en) * | 2018-05-30 | 2018-11-13 | 富士房车（江苏）有限公司 | It is a kind of plate armour type fiberglass hyperbolic arch wheel enclose |
| CN111775985A (en) * | 2020-07-30 | 2020-10-16 | 北京天仁道和新材料有限公司 | Cab hood of magnetic levitation vehicle and manufacturing method thereof |
| US10960929B2 (en) | 2014-07-02 | 2021-03-30 | Divergent Technologies, Inc. | Systems and methods for vehicle subassembly and fabrication |
| US10960468B2 (en) | 2014-07-02 | 2021-03-30 | Divergent Technologies, Inc. | Stress-based method for optimization of joint members within a complex structure |
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| CN100404347C (en) * | 2006-07-03 | 2008-07-23 | 安徽安凯汽车股份有限公司 | Completely-loaded vehicle body |
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1987
- 1987-04-02 CN CN87102543.4A patent/CN1003924B/en not_active Expired
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192480A (en) * | 2012-01-05 | 2013-07-10 | 应革 | One-time forming process of plastic vehicle body with built-in steel net and aluminum frame |
| CN103707937A (en) * | 2013-12-12 | 2014-04-09 | 北京化工大学 | Plasticized car body overall-molding method |
| US10960929B2 (en) | 2014-07-02 | 2021-03-30 | Divergent Technologies, Inc. | Systems and methods for vehicle subassembly and fabrication |
| US10960468B2 (en) | 2014-07-02 | 2021-03-30 | Divergent Technologies, Inc. | Stress-based method for optimization of joint members within a complex structure |
| CN108349544A (en) * | 2015-08-31 | 2018-07-31 | 戴弗根特技术有限公司 | System and method for vehicles sub-component and making |
| CN108349544B (en) * | 2015-08-31 | 2022-11-15 | 戴弗根特技术有限公司 | System and method for vehicle subassembly and fabrication |
| CN106584925A (en) * | 2016-11-29 | 2017-04-26 | 上海晋飞碳纤科技股份有限公司 | Integrally-formed, flame-retardant and high-strength roof board of high-speed railway carriage and forming process of roof |
| CN108501274A (en) * | 2017-02-27 | 2018-09-07 | 丹阳市金业来车辆装饰件有限公司 | A kind of production technology of class-A surfaces fiber reinforcement polyurethane hard decorative part |
| CN108791517A (en) * | 2018-05-30 | 2018-11-13 | 富士房车（江苏）有限公司 | It is a kind of plate armour type fiberglass hyperbolic arch wheel enclose |
| CN111775985A (en) * | 2020-07-30 | 2020-10-16 | 北京天仁道和新材料有限公司 | Cab hood of magnetic levitation vehicle and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1003924B (en) | 1989-04-19 |
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