CN104999673A - Forming method of non-woven fiber composite material for replacing metal - Google Patents
Forming method of non-woven fiber composite material for replacing metal Download PDFInfo
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- CN104999673A CN104999673A CN201510344280.2A CN201510344280A CN104999673A CN 104999673 A CN104999673 A CN 104999673A CN 201510344280 A CN201510344280 A CN 201510344280A CN 104999673 A CN104999673 A CN 104999673A
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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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
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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
-
- 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
- B29C70/545—Perforating, cutting or machining during or after moulding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention discloses a forming method of non-woven fiber composite material for replacing metal. The method includes the steps that step1, high-strength fibers of which the tensile strength is larger than 800 MPa are adopted as raw materials, opening and carding steps are completed according to a non-woven cloth production process, needle puncturing is not needed, and the fibers are mixed well to become non-woven fibers in a fluffy state; step2, by the adoption of a dry method, the non-woven fibers in the fluffy state are placed inside a cavity of a mold to be shaped in a mold pressing mode; step3, resin of which the strength is larger than 40 MPa is injected into the cavity of the mold in a vacuum environment, heated, solidified and shaped to be a workpiece; step4, the workpiece is taken out of the mold, and a water cutting technology is adopted for trimming the pressing edge or the local part of the workpiece, so that the finished product is obtained. By the adoption of the method, the formed test sample piece already reaches the tensile strength of 518 MPa, and can reach the level of high-strength steel.
Description
Technical field
The invention belongs to the forming method of fibrous composite, be specifically related to a kind of non-woven fibre composite material forming method of alternative metals.
Background technology
Adopt fibrous composite to substitute steel in industrial quarters extensive use, at present the main composite making alternative steel by carbon fiber and resin compounded, and there is following problem by carbon fibre composite production technology:
1. production cost is high, even low side is used for civilian carbon fiber also want 20-40 ten thousand/ton;
2. energy consumption is high, and carbon fiber first need generate chemical fibre, then carbonization becomes carbon fine in high temperature with vacuum environment, because China is consumption of coal energy big country, uses carbon fiber very large to environmental pressure so extensive;
3. efficiency is low: after carbon fibre composite is woven into cloth, and successively tiling adopts pattern legal type, and production efficiency is very low;
4. the bearing capacity opposite sex: thickness direction is without fiber reinforcement in tiling for carbon fiber, and therefore carbon fibre has good resistance to tension, but shear resistance is not given prominence to.
Because carbon fiber cannot be produced without spinning process with common, mainly because carbon fibre is too crisp, the general acupuncture course without spinning equipment cannot be completed, thus the advantage of non-woven fibre always not be familiar with by machinery industry, rarely have the report of the composite adopting the alternative steel of non-woven fibre preparation.And traditional fibre application belong to textile industry, there is huge technology wide gap between textile industry and mechanical engineering, also cause some characteristic of fiber and textile technology not be familiar with by mechanical field.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, the non-woven fibre composite material forming method of the alternative metals providing a kind of cost low, energy-saving and cost-reducing, has higher mechanical strength with fibrous composite prepared by the method.
For the technical scheme realizing the object of the invention employing is as follows:
The non-woven fibre composite material forming method of alternative metals, comprises the following steps:
1, adopt tensile strength to be greater than the high-intensity fiber of 800MPa as raw material, complete shredding, combing operation by nonwoven production flow process, but do not carry out acupuncture, make fiber carry out the good non-woven fibre being mixed into fluffy state;
2, dry method is adopted: in the die cavity of the non-woven fibre of fluffy state being inserted mould and mold pressing (extruding or punching press) setting;
3, in die cavity, inject the resin that intensity is greater than 40MPa under vacuum conditions, be heating and curing and be shaped into workpiece (for different resins, corresponding known condition of cure can be adopted);
4, workpiece is taken out in mould, adopt Water Cutting technique to repair the flanging of workpiece or local, obtain finished product.
Another kind of forming method of the present invention, comprises the following steps:
1, adopt tensile strength to be greater than the high-intensity fiber of 800MPa as raw material, complete shredding, combing, pre-needling operation by nonwoven production flow process, make the non-woven fabrics of desired thickness;
2, wet method is adopted: non-woven fabrics is first dipped in intensity and is greater than in the resin of 40MPa, take out, then it is extruded to be placed in mould after resin impregnated, be heating and curing sizing;
3, workpiece is taken out in mould, adopt Water Cutting technique to repair the flanging of workpiece or local, obtain finished product.
The tensile strength of described high-intensity fiber is greater than 2.0GPa, to increase the structural strength of workpiece.
Between combing and pre-needling, lapping operation is increased, so that fibres set in subsequent handling in described nonwoven production flow process.
Beneficial effect of the present invention:
The present invention adopts high-strength chemical-fibre and high-strength resin base compound, and chemical fibre adopts without spinning mode, and it specifically has following advantage:
Cost is low: China is experimental branch line big country, and some high-end chemical fibre such as (vinylon, aramid fiber etc.) only has 1.8-2 ten thousand yuan/ton, and its strength and modulus has reached the level of low side carbon fibre.
Energy consumption is low: without vacuum high-temperature carbonisation, especially vinylon does not need Petroleum Production, adopts lime masonry raw material to be well suited for national conditions.
Adopting nonwoven process efficiency high: without the need to successively tiling, adopting mould to be once pressed into, its fiber content can free adjustment as requested.
Interweave because non-woven fabrics exists thickness direction, therefore made component shearing resistance and impact resistance comparatively strong (but lower than there being needling process).
Because chemical fibre has certain malleable, therefore when occurring to destroy, secondary pollution and injury can be produced because of embrittlement unlike the fine goods of carbon.
Having maximum advantage without acupuncture non-woven fibre is: all fibres combing is all in fluffy state, can infinitely meet component demand in theory at volume, easily can produce the component of large, the high thickness of volume like this.
The test sample prepared by the inventive method is adopted to reach tensile strength 518MPa, the level of high-strength steel can be reached, if and do necessarily to optimize to resin and chemical fibre, then may obtain higher mechanical strength completely, therefore adopt the non-woven fabric composite material based on chemical fibre to have ability and the condition of alternative steel.
Technical scheme of the present invention is further illustrated below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the process chart that the inventive method adopts wet production product.
Fig. 2 is the motor rear cover schematic diagram that the inventive method adopts wet-layer preparation.
Fig. 3 is the process chart that the inventive method adopts dry production product.
Fig. 4 is the Automobile wheel hub schematic diagram that the inventive method adopts dry process.
Fig. 5 is the gear shift cover schematic diagram that the inventive method adopts dry process.
Detailed description of the invention
Embodiment 1
Certain vehicle suspension swing arm wet method makes: its technique as shown in Figure 1, adopt the vinylon fibre of hot strength 2.4GPa as raw material, shredding is completed by nonwoven production flow process, combing, after lapping and pre-needling operation, make the non-woven fabrics that thickness is 50-70mm, this non-woven fabrics is dipped among thermosetting resin vinyl ester resin, resin is made to soak into non-woven fabrics completely, again the non-woven fabrics soaked into is placed in mould, it is extruded, be heating and curing sizing simultaneously, heating-up temperature is 80-120 degree, temperature retention time is 1-1.5 hour, be processed into workpiece, with Water Cutting equipment, the flanging of workpiece or local are repaired.Final products have better rigidity and tensile strength, and tensile strength can reach more than 320MPa, and meanwhile, material, respectively to being tending towards the same sex, can bear higher impact and shearing force.
Embodiment 2
Certain motor rear cover wet method makes: adopt hot strength to be greater than 800MPa terylene, after completing shredding, combing operation by nonwoven production flow process, pre-needling is carried out to non-woven fabrics, make the non-woven fabrics stock that thickness is the non-glue spraying of 15 ~ 20mm, cloth non-woven fabrics stock being cut into suitable dimension is placed in phenolic resins fermentation vat, mechanical strength of resin is greater than 40MPa, after being soaked into, insert in die cavity, by mold heated to 80-100 degree, insulation 40-60 minute, after the thorough solidifying and setting of resin, obtain workpiece, as shown in Figure 2.Final products have better rigidity, and meanwhile, material is respectively to being tending towards the same sex.
Embodiment 3
Vertical Beam inner panel dry fabrication before certain vehicle: its technique as shown in Figure 3, adopt the vinylon fibre raw material of hot strength 2.4GPa, shredding is completed by nonwoven production flow process, combing, after lapping and acupuncture operation, make the non-woven fabrics stock that thickness is the non-glue spraying of 8 ~ 12mm, adopt dry method, cloth non-woven fabrics stock being cut into suitable dimension is inserted in the die cavity of mould, first cloth is compressed, again die cavity is vacuumized, then the thermosetting resin phenolic resins that tensile strength is 60MPa is injected, mold heated temperature is 180 degree, temperature retention time is 1 hour, treat that the thorough solidifying and setting of resin becomes workpiece, with Water Cutting equipment, the flanging of workpiece or local are repaired.Final products have better rigidity and tensile strength, and tensile strength can reach more than 300MPa, and meanwhile, material, respectively to being tending towards the same sex, can bear higher impact and shearing force.
Embodiment 4
Certain Automobile wheel hub dry fabrication: adopt hot strength to be greater than the aramid fiber raw material of 2.8GPa, after completing shredding, combing, lapping and acupuncture operation by nonwoven production flow process, make the non-woven fabrics stock that thickness is the non-glue spraying of 8 ~ 12mm, adopt dry method, cloth non-woven fabrics stock being cut into suitable dimension is inserted in the die cavity of mould, first cloth is compressed, again die cavity is vacuumized, then epoxide modified corrosion-resisting resin is injected, mold heated temperature is 120 degree, temperature retention time is 1-1.5 hour, treats that the thorough solidifying and setting of resin becomes workpiece, as shown in Figure 4.Final products have better rigidity and tensile strength, and meanwhile, material, respectively to being tending towards the same sex, can bear higher impact and shearing force.
Be tending towards the same sex, higher impact, shearing force and tensile force can be born.
Embodiment 5
Certain gear shift cover dry fabrication: the polyester fiber raw materials adopting hot strength 800MPa, shredding is completed by nonwoven production flow process, combing, after acupuncture operation, make the non-woven fabrics stock that thickness is the non-glue spraying of 10 ~ 25mm, adopt dry method, cloth non-woven fabrics stock being cut into suitable dimension is inserted in the die cavity of mould, first cloth is compressed, again die cavity is vacuumized, then injecting tensile strength is 60MPa thermosetting phenolic resin, mold heated temperature is 180 degree, temperature retention time is 1 hour, treat that the thorough solidifying and setting of resin becomes workpiece, with Water Cutting equipment, finished product is repaired to obtain to the flanging of workpiece or local, as shown in Figure 5.Product has better rigidity and tensile strength, and tensile strength can reach more than 180MPa.
Claims (3)
1. a non-woven fibre composite material forming method for alternative metals, is characterized in that comprising the following steps:
Step one, employing tensile strength are greater than the high-intensity fiber of 800MPa as raw material, complete shredding, combing operation, but do not carry out acupuncture, make fiber carry out the good non-woven fibre being mixed into fluffy state by nonwoven production flow process;
Step 2, adopt dry method: in the die cavity of the non-woven fibre of fluffy state being inserted mould and mold pressing setting;
Step 3, in die cavity, inject the resin that intensity is greater than 40MPa under vacuum conditions, be heating and curing and be shaped into workpiece;
Step 4, workpiece to be taken out in mould, adopt Water Cutting technique to repair the flanging of workpiece or local, obtain finished product.
2. the non-woven fibre composite material forming method of alternative metals according to claim 1, is characterized in that the tensile strength of described high-intensity fiber is greater than 2.0GPa.
3. the non-woven fibre composite material forming method of alternative metals according to claim 1 and 2, is characterized in that after combing, increasing lapping operation in described nonwoven production flow process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510344280.2A CN104999673A (en) | 2015-06-19 | 2015-06-19 | Forming method of non-woven fiber composite material for replacing metal |
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| CN201510344280.2A CN104999673A (en) | 2015-06-19 | 2015-06-19 | Forming method of non-woven fiber composite material for replacing metal |
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| CN104999673A true CN104999673A (en) | 2015-10-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1563541A (en) * | 2004-04-21 | 2005-01-12 | 天津工业大学 | Method for fabricating non-woven fabric from flax and composite material |
| EP1524106A1 (en) * | 2003-10-14 | 2005-04-20 | Saab Ab | Method of forming a composite structure |
| CN101166621A (en) * | 2004-12-29 | 2008-04-23 | 欧文斯-康宁玻璃纤维技术第二有限公司 | Polymer/WUCS mat for use in sheet molding compounds |
| CN101220562A (en) * | 2007-11-23 | 2008-07-16 | 东华大学 | Chinese medicine slag filling non woven composite material and preparation thereof |
-
2015
- 2015-06-19 CN CN201510344280.2A patent/CN104999673A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1524106A1 (en) * | 2003-10-14 | 2005-04-20 | Saab Ab | Method of forming a composite structure |
| CN1563541A (en) * | 2004-04-21 | 2005-01-12 | 天津工业大学 | Method for fabricating non-woven fabric from flax and composite material |
| CN101166621A (en) * | 2004-12-29 | 2008-04-23 | 欧文斯-康宁玻璃纤维技术第二有限公司 | Polymer/WUCS mat for use in sheet molding compounds |
| CN101220562A (en) * | 2007-11-23 | 2008-07-16 | 东华大学 | Chinese medicine slag filling non woven composite material and preparation thereof |
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Application publication date: 20151028 |
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