CN105619841A - Forming method for thermoplastic composite material - Google Patents
Forming method for thermoplastic composite material Download PDFInfo
- Publication number
- CN105619841A CN105619841A CN201511016019.6A CN201511016019A CN105619841A CN 105619841 A CN105619841 A CN 105619841A CN 201511016019 A CN201511016019 A CN 201511016019A CN 105619841 A CN105619841 A CN 105619841A
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- Prior art keywords
- thermoplastic composite
- thermoplastic
- mould
- forming method
- resin
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/14—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
- B29C48/146—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration in the die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a forming method for thermoplastic composite material. The method comprises the steps that the thermoplastic composite material is placed into an injection molding machine (10), is heated through a plurality of sections of a heating zone (12) of the injection molding machine (10) for being molten and then is extruded, and the molten thermoplastic material is injected into a resin transfer molding mold (1) with fiber performing bodies laid under the needed pressure for being fast soaked with fiber fabric and is finally cooled and formed in a sealed mold. According to the method, the extrusion technology of the thermoplastic material and the RTM forming technology of the composite material are combined, the thermoplastic composite material of a complex structure is formed, the forming quality of the thermoplastic composite material of the complex structure is guaranteed, the preparation process of prepreg is eliminated, the cost is saved, the production efficiency is improved, and the problem that the complex structure is difficult to lay and prepare through the thermoplastic prepreg is solved.
Description
Technical field
The invention belongs to resin transfer moulding (RTM, ResinTransferMolding) molding technology thereof field, particularly relate to a kind of thermoplastic composite forming method.
Background technology
By the difference of resinous type, polymer matrix composites are divided into thermosetting resin based composites and thermoplastic resin based composite material. Compared with thermosetting resin based composites, thermoplastic resin based composite material has following feature: excellent toughness, antifatigue damage performance; Shaping cycle is short, production efficiency height; Fiber prepreg material need not be deposited at low temperatures; Goods can repeat processing, waste product reproducible utilization; Product design degree of freedom is big, can be made into complicated shape, shaping wide adaptability. In thermoplastic composite, thermoplastic resin plays the effect of fixing fiber, gives the special thermal characteristics of material, corrosion resistance nature and processing characteristics etc. simultaneously. Continuous fibre mainly carries external load, it is resolved that the mechanical property of matrix material, applies wider fiber and mainly contains glass fibre, carbon fiber and aramid fiber etc. The development of thermoplastic resin; the particularly development of new aromatic thermoplastic resin matrix; improve the rigidity of matrix material, thermotolerance and resistance to medium; make thermoplastic composite obtain development more and more widely and application in fields such as aerospace, medical treatment, electronics, machineries, become the research and development focus of field of compound material Showed Very Brisk. Thermoplastic resin as advanced polymer matrix composites resin matrix mainly contains: polyethersulfone (PES), polyether-ether-ketone (PEEK), polyetherimide (PAI), polyphenylene sulfide (PPS) etc.
Continuous fiber reinforced thermoplastic composite material has a lot of advantages, but thermoplastic resin, the Particular thermoplastic's melting point resin especially for the advanced polymer matrix composites of preparation is higher, and melt viscosity is big, general at more than 100Pa.s, bring difficulty to the preparation of matrix material. Therefore one of applicable thermoplastic resin matrix and efficient forming method focus becoming thermoplastic composite research in recent years is developed. The preparation of thermoplastic resin based composite material is generally divided into two steps: the preparation of prepreg and the shaping of product. Under thermoplastic resin normal temperature big in poor, fusing point height solid-state, molten and melt viscosity, the gordian technique therefore preparing prepreg is solve the be uniformly distributed problem of resin on fiber and resin to the continuous impregnating problem of fiber. Prepreg preparation method main at present has solution dipping method, melt impregnation method, powder pickling process, slurry shape resin infusion process and shuffling method etc. The product moulding process of thermoplastic composite mainly contains that hot pressing is shaping, fiber winding forming, roll-forming, pultrusion etc.
Resin transfer moulding (RTM, ResinTransferMolding) will infiltrate strongthener in resin injection close die and the processing method of curing molding, is suitable for multi items, middle batch, high quality advanced composite material shaping. This advanced technologies has plurality of advantages, can use multiple fiber reinforced material and resin system, has fabulous product surface. The goods being applicable to manufacture high quality complicated shape, and in fibre content height, moulding process, volatile component is few, low in the pollution of the environment, production automation strong adaptability, less investment, production efficiency height. Therefore, RTM technique is widely applied on automotive industry, aerospace, national defense industry, mechanical means, electronic product.
RTM is that paving has covered strongthener in advance in closed mould cavity, then thermosetting resin is injected in die cavity, infiltrate strongthener wherein, resin is cure and demold when room temperature or intensification, again the goods after the demoulding are carried out the aftertreatment such as surface finish, polishing if desired, obtain a kind of hi-tech liquid composite molding technology of the smooth goods in two sides. So far, the shaping more resin used of RTM is the thermosetting resin of the low viscosity such as epoxy resin, resol, strengthens matrix and mostly is carbon fibre fabric, glasscloth etc.
Traditional composite resin transfer mould device comprises mould, mould scribbles releasing agent, with conveniently stripped and obtain smooth bright and clean article surface, fabric is laid on the bed die scribbling releasing agent (if needed, release cloth can be put on most last layer fabric upper berth) in order to conveniently stripped, mix the good thermoplastic composite of deaeration in advance to be contacted with fabric by valve tube injection mould under suitable pressure by air compressor machine and reducing valve, constantly flowing is permeated until soaking into fabric, the air of venting port for getting rid of in mould, avoid the generation of product mesoporosity.
Conventional resins Transfer molding resin used mostly is thermosetting resin, solidification required time longer (generally needing hot setting 2-3 hour): heating, mould reaches solidification value, is incubated 2-3 hour, cooling after solidification, whole process required time reaches 5-6 hour. Due to resin transfer moulding die cost relatively other techniques costly, producing time that goods take mould, more long then production cost is more high relatively, therefore solidified forming time is shortened, it is possible to reduce the holding time to mould thus reduce production cost.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of thermoplastic composite forming method, dry fiber is adopted to prepare preform, change traditional thermoplasticity prepreg to be difficult to spread the shortcoming covered, thermoplastic composite shaping of complex construction can be realized, and decrease the preparation process of thermoplasticity prepreg, save cost, it is to increase production efficiency.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of thermoplastic composite forming method, wherein said method is: put into by thermoplastic composite in injection moulding machine, thermoplastic composite melting is made through the heating of some sections, injection moulding machine heating zone, then extrude, at the desired pressure the thermoplastic material under molten state is injected and spread the resin transfer moulding mould putting perform manufacturing well, the thermoplastic composite under molten state is made to soak into fabric fast, finally cooling forming in sealed mold.
The further technical scheme of the present invention is, the described resin transfer moulding mould putting perform manufacturing well that spread is first be laid in by fabric on the bed die scribbling releasing agent, is sealed by mould, gets rid of bubble in mould, then by mold heated to assigned temperature.
The further again technical scheme of the present invention is, described resin transfer moulding mould is by baking oven for heating or designs oil pipe circulation heating and cooling system at mould inside, it is achieved the rapid heating of mould or cooling.
The further again technical scheme of the present invention is that described resin transfer moulding mould adopts the mode vacuumized to get rid of bubble in mould.
The further again technical scheme of the present invention is that release cloth is put on described fabric upper berth, conveniently stripped.
The further again technical scheme of the present invention is that the one in azoles fiber dry state fabric disliked by polyparaphenylene's benzo two that described fabric is glass fibre or carbon fiber or ultra-high strength polyethylene or aramid fiber or stiff chain structure.
The present invention more further technical scheme be that described thermoplastic composite is the one in polyether-ether-ketone resin or polyether ketone resin or polyphenylene sulfide or polyetherimide resin or polycarbonate.
The further again technical scheme of the present invention is that described thermoplastic composite puts into injection moulding machine by feeding hopper.
The further again technical scheme of the present invention is, described thermoplastic composite passes through screw extruder zone heating to molten state, and in the resin transfer moulding mould thermoplastic resin of molten state injected by the pressure of screw extruder, and infiltrate and spread the fabric covered in advance, after cooling, form matrix material.
The further technical scheme of the present invention is, described screw extruder is realized the different velocity of flow of thermoplastic composite by control screw speed thus controlled different pressures injection moulding.
The extruding technology of thermoplastic material, in order to solve conventional thermal plastic composites and need first to prepare prepreg and then make composite structure and thermoplasticity prepreg is difficult to spread the problem covered and prepare complex construction, is combined by patent of the present invention with the RTM forming technique of matrix material. Under utilizing the pressure effect that thermoplastic material extruded to molten state and at screw rod by screw rod zone heating by extruding technology, the thermoplastic resin of molten state is injected paving in advance and cover the RTM close die of fibre reinforcement, and infiltrate perform manufacturing, through cooling aftershaping. The method can realize the shaping of the thermoplastic composite of complex construction, ensure that the thermoplastic composite Forming Quality of complex construction, eliminates the preparation process of prepreg, saves cost and improves production efficiency.
The moulding process RTM that the present invention applies has used very ripe in thermosetting resin base composite material forming, and except that matrix be thermoplasticity, by coordinating injection moulding machine to be injected in RTM mold by after thermoplastic resin heating and melting under applicable pressure, meanwhile RTM mold utilizes oil hot systems heating to be also in the condition of high temperature, it is beneficial to thermoplastic resin flowing in a mold, infiltration, thus infiltrates perform manufacturing fast. Thus prepare high performance thermoplastic resin based composite material fast.
Compared with prior art, the invention has the beneficial effects as follows:
The matrix that the present invention adopts is thermoplastic resin, and the composite products density prepared by it is little, intensity height, and the density of thermoplastic composite is 1.1-1.6g/cm3; Higher toughness and damage tolerance; Product has very low rate of moisture absorption; Internal voids rate is very low; The degree of freedom of performance designability is big; Thermal characteristics is improved; Chemical resistance is better; Waste material can be recycled, and thermoplastic composite can repeat machine-shaping, and waste product and tailing can be recycled, and can not cause environmental pollution.
Injection moulding machine is combined by the present invention with RTM forming mould, preparation high-performance product shorten shaping required time simultaneously, reduce the holding time to mould, improve mould utilization factor, reduce die cost so that mass production cost and efficiency are improved. Cost starting material is decreased simultaneously, select and collocation scope also more extensive.
Accompanying drawing explanation
Fig. 1 is the process principle figure that the present invention adopts injection moulding and is combined with resin transfer moulding;
Fig. 2 is conventional composite materials resin transfer molding process principle figure.
Wherein: 1, resin transfer moulding mould, 2, releasing agent, 3, fabric, 4, release cloth, 5, thermoplastic composite, 6, air compressor machine, 7, reducing valve, 8, valve tube, 9, venting port, 10, injection moulding machine main frame, 11, feeding hopper, 12, heating zone, 13, oil pipe repeated heating & cooling system.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further. Limit the scope of the invention it will be understood that these embodiments are only not used in for illustration of the present invention. In addition it will be understood that after having read the content that the present invention lectures, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
A kind of thermoplastic composite forming method, wherein said method is: put into by thermoplastic composite in injection moulding machine 10, thermoplastic composite melting is made through the heating of 12 some sections, the heating zone of injection moulding machine 10, then extrude, at the desired pressure the thermoplastic material under molten state is injected and spread the resin transfer moulding mould 1 putting perform manufacturing well, the thermoplastic composite under molten state is made to soak into fabric fast, finally cooling forming in sealed mold.
The described resin transfer moulding mould 1 putting perform manufacturing well that spread is first be laid in by fabric 3 on the bed die scribbling releasing agent 2, is then sealed by upper and lower mould, gets rid of bubble in mould, then by mold heated to assigned temperature; Described resin transfer moulding mould 1 is by baking oven for heating or designs oil pipe circulation heating and cooling system 13 at mould inside, it is achieved the rapid heating of mould or cooling, described resin transfer moulding mould 1 adopts the mode vacuumized to get rid of bubble in mould.
Release cloth 4 is put on described fabric 3 upper berth, conveniently stripped; The one in azoles fiber dry state fabric disliked by polyparaphenylene's benzo two that described fabric 3 is glass fibre or carbon fiber or ultra-high strength polyethylene or aramid fiber or stiff chain structure, dry fabric has the well paving property covered, applicable shaping in complex construction.
Described thermoplastic composite is the one in polyether-ether-ketone resin or polyether ketone resin or polyphenylene sulfide or polyetherimide resin or polycarbonate, and described thermoplastic composite puts into injection moulding machine 10 by feeding hopper 11.
Described thermoplastic composite passes through screw extruder zone heating to molten state, and in the resin transfer moulding mould 1 thermoplastic resin of molten state injected by the pressure of screw extruder, and infiltrate and spread the fabric 3 covered in advance, after cooling, form matrix material; Described screw extruder is realized the different velocity of flow of thermoplastic composite by control screw speed thus is controlled different pressures injection moulding.
As shown in Figure 1, concrete processing step is:
1, fabric 3 is first laid on the bed die scribbling releasing agent 2;
2, in order to conveniently stripped, release cloth 4 is laid on fabric 3;
3, resin transfer moulding mould 1 is sealed, and adopt the mode vacuumized to get rid of bubble, then adopt the oil temperature recycle system 13 or baking oven by mold heated to assigned temperature;
4, thermoplastic composite is put into injection moulding machine 10 by feeding hopper 11, made the thermoplastic composite melting added by heating region 12;
5, control thermoplastic composite velocity of flow and pressure by control screw speed, make the thermoplastic composite of melting inject the mold heat sealed, constantly flow, permeate, so that fabric is infiltrated;
6, final fast cooling under proper condition, the demoulding obtains product.
Claims (10)
1. a thermoplastic composite forming method, it is characterized in that: described method is: thermoplastic composite is put in injection moulding machine (10), heating zone (12) some sections of heating through injection moulding machine (10) make thermoplastic composite melting, then extrude, at the desired pressure the thermoplastic material under molten state is injected and spread the resin transfer moulding mould (1) putting perform manufacturing well, the thermoplastic composite under molten state is made to soak into fabric fast, finally cooling forming in sealed mold.
2. a kind of thermoplastic composite forming method according to claim 1, it is characterized in that: the described resin transfer moulding mould (1) putting perform manufacturing well that spread is for be first laid on the bed die scribbling releasing agent (2) by fabric (3), then upper and lower mould is sealed, get rid of bubble in mould, then by mold heated to assigned temperature.
3. a kind of thermoplastic composite forming method according to claim 2, it is characterized in that: described resin transfer moulding mould (1) is by baking oven for heating or designs oil pipe circulation heating and cooling system (13) at mould inside, it is achieved the rapid heating of mould or cooling.
4. a kind of thermoplastic composite forming method according to claim 2, it is characterised in that: described resin transfer moulding mould (1) adopts the mode vacuumized to get rid of bubble in mould.
5. a kind of thermoplastic composite forming method according to claim 2, it is characterised in that: release cloth (4) is put on described fabric (3) upper berth, conveniently stripped.
6. a kind of thermoplastic composite forming method according to claim 2, it is characterised in that: described fabric (3) dislikes the one in azoles fiber dry state fabric for polyparaphenylene's benzo two of glass fibre or carbon fiber or ultra-high strength polyethylene or aramid fiber or stiff chain structure.
7. a kind of thermoplastic composite forming method according to claim 1, it is characterised in that: described thermoplastic composite is the one in polyether-ether-ketone resin or polyether ketone resin or polyphenylene sulfide or polyetherimide resin or polycarbonate.
8. a kind of thermoplastic composite forming method according to claim 1, it is characterised in that: described thermoplastic composite puts into injection moulding machine (10) by feeding hopper (11).
9. a kind of thermoplastic composite forming method according to claim 1, it is characterized in that: described thermoplastic composite passes through screw extruder zone heating to molten state, and in the resin transfer moulding mould (1) thermoplastic resin of molten state injected by the pressure of screw extruder, and infiltrate and spread the fabric (3) covered in advance, after cooling, form matrix material.
10. a kind of thermoplastic composite forming method according to claim 9, it is characterised in that: described screw extruder is realized the different velocity of flow of thermoplastic composite by control screw speed thus is controlled different pressures injection moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016019.6A CN105619841A (en) | 2015-12-29 | 2015-12-29 | Forming method for thermoplastic composite material |
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| CN201511016019.6A CN105619841A (en) | 2015-12-29 | 2015-12-29 | Forming method for thermoplastic composite material |
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| CN105619841A true CN105619841A (en) | 2016-06-01 |
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| CN201511016019.6A Pending CN105619841A (en) | 2015-12-29 | 2015-12-29 | Forming method for thermoplastic composite material |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946488A (en) * | 2017-11-16 | 2018-04-20 | 北京航空航天大学 | Composite material battery case and preparation process based on continuous fiber Yu long fibre hybrid design |
| CN108248073A (en) * | 2018-01-16 | 2018-07-06 | 胜利油田新大管业科技发展有限责任公司 | A kind of method for preparing fiber reinforcement valve module, valve module and valve |
| CN108443095A (en) * | 2018-05-22 | 2018-08-24 | 国电联合动力技术有限公司 | A kind of blower fan tower barrel composite material cable clamping plate and preparation method thereof |
| CN108973168A (en) * | 2018-06-22 | 2018-12-11 | 朱波 | A kind of method of high-pressure smelting dipping preparation thermoplasticity carbon fibre composite artificial limb protector |
| CN109624198A (en) * | 2018-12-10 | 2019-04-16 | 重庆大学 | A kind of fiber cloth composite material forming method |
| CN109703065A (en) * | 2017-10-26 | 2019-05-03 | 佛吉亚汽车复合材料公司 | The method for manufacturing composite material component |
| CN109795208A (en) * | 2017-11-16 | 2019-05-24 | 株式会社迪思科 | The manufacturing method of core material and the manufacturing method of copper-clad laminated board |
| CN110944827A (en) * | 2017-07-25 | 2020-03-31 | 罗图公司 | Method and device for producing composite components having complex shapes |
| CN111037951A (en) * | 2019-12-30 | 2020-04-21 | 中国航空制造技术研究院 | Composite material liquid molding injection device and method |
| CN112512773A (en) * | 2018-08-03 | 2021-03-16 | 克劳斯玛菲科技有限公司 | Method and apparatus for manufacturing fiber-reinforced plasticizers |
| CN113329866A (en) * | 2018-12-18 | 2021-08-31 | 法国圣戈班高性能塑胶公司 | Method for producing a composite material in the form of a sandwich |
| CN114872273A (en) * | 2022-05-19 | 2022-08-09 | 北京化工大学 | In-mold coating injection molding method for continuous fiber reinforced thermoplastic composite material |
| CN115592981A (en) * | 2022-10-14 | 2023-01-13 | 惠州硕贝德新材料技术有限公司（Cn） | Thermoplastic molding process for prepreg and injection molding mold |
| CN117082796A (en) * | 2023-10-16 | 2023-11-17 | 歌尔股份有限公司 | Electronic device, composite shell and preparation method thereof |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110944827A (en) * | 2017-07-25 | 2020-03-31 | 罗图公司 | Method and device for producing composite components having complex shapes |
| CN109703065A (en) * | 2017-10-26 | 2019-05-03 | 佛吉亚汽车复合材料公司 | The method for manufacturing composite material component |
| CN109795208A (en) * | 2017-11-16 | 2019-05-24 | 株式会社迪思科 | The manufacturing method of core material and the manufacturing method of copper-clad laminated board |
| CN107946488A (en) * | 2017-11-16 | 2018-04-20 | 北京航空航天大学 | Composite material battery case and preparation process based on continuous fiber Yu long fibre hybrid design |
| CN109795208B (en) * | 2017-11-16 | 2023-05-12 | 株式会社迪思科 | Method for manufacturing core material and method for manufacturing copper-clad laminate |
| CN108248073A (en) * | 2018-01-16 | 2018-07-06 | 胜利油田新大管业科技发展有限责任公司 | A kind of method for preparing fiber reinforcement valve module, valve module and valve |
| CN108443095A (en) * | 2018-05-22 | 2018-08-24 | 国电联合动力技术有限公司 | A kind of blower fan tower barrel composite material cable clamping plate and preparation method thereof |
| CN108973168A (en) * | 2018-06-22 | 2018-12-11 | 朱波 | A kind of method of high-pressure smelting dipping preparation thermoplasticity carbon fibre composite artificial limb protector |
| CN112512773B (en) * | 2018-08-03 | 2023-04-04 | 克劳斯玛菲科技有限公司 | Method and apparatus for manufacturing fiber-reinforced plasticizers |
| CN112512773A (en) * | 2018-08-03 | 2021-03-16 | 克劳斯玛菲科技有限公司 | Method and apparatus for manufacturing fiber-reinforced plasticizers |
| CN109624198A (en) * | 2018-12-10 | 2019-04-16 | 重庆大学 | A kind of fiber cloth composite material forming method |
| CN113329866A (en) * | 2018-12-18 | 2021-08-31 | 法国圣戈班高性能塑胶公司 | Method for producing a composite material in the form of a sandwich |
| CN111037951A (en) * | 2019-12-30 | 2020-04-21 | 中国航空制造技术研究院 | Composite material liquid molding injection device and method |
| CN114872273A (en) * | 2022-05-19 | 2022-08-09 | 北京化工大学 | In-mold coating injection molding method for continuous fiber reinforced thermoplastic composite material |
| CN114872273B (en) * | 2022-05-19 | 2023-07-25 | 北京化工大学 | In-mold cladding injection molding method for continuous fiber reinforced thermoplastic composite material |
| CN115592981A (en) * | 2022-10-14 | 2023-01-13 | 惠州硕贝德新材料技术有限公司（Cn） | Thermoplastic molding process for prepreg and injection molding mold |
| CN115592981B (en) * | 2022-10-14 | 2023-10-13 | 惠州硕贝德新材料技术有限公司 | Thermoplastic forming process for impregnating compound |
| CN117082796A (en) * | 2023-10-16 | 2023-11-17 | 歌尔股份有限公司 | Electronic device, composite shell and preparation method thereof |
| CN117082796B (en) * | 2023-10-16 | 2024-03-12 | 歌尔股份有限公司 | Electronic device, composite shell and preparation method thereof |
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Application publication date: 20160601 |