CN105014989A - Preparation method of needle punched non-woven fabric composite material capable of replacing metal - Google Patents
Preparation method of needle punched non-woven fabric composite material capable of replacing metal Download PDFInfo
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- CN105014989A CN105014989A CN201510344238.0A CN201510344238A CN105014989A CN 105014989 A CN105014989 A CN 105014989A CN 201510344238 A CN201510344238 A CN 201510344238A CN 105014989 A CN105014989 A CN 105014989A
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- woven fabrics
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- woven fabric
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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
- B29C70/34—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 shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—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 shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
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- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a preparation method of a needle punched non-woven fabric composite material capable of replacing metal. The preparation method is characterized by comprising the following steps: 1, taking high-strength fiber with tensile strength being greater than 0.8GPa as a raw material, and preparing the raw material into non-woven fabric blank without glue according to a production technology of the needle punched non-woven fabric; and 2, by adopting a dry method, cutting the non-woven fabric blank into a piece of fabric with suitable size, placing the fabric into a cavity of a mold, compressing the fabric, vacuumizing the cavity, pouring resin into the cavity, and finally carrying out heat curing for setting. A test sample prepared by adopting the preparation method provided by the invention has the tensile strength being 528MPa, which meets the standard of high-strength steel, higher mechanical strength can be completely obtained if the resin and chemical fiber are optimized to a certain degree, and therefore, the needle punched non-woven fabric composite material based on the chemical fiber has the capacity and condition to replace steel.
Description
Technical field
The invention belongs to the preparation method of fibrous composite, be specifically related to a kind of preparation method having needle punched non-woven fabrics composite 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, thus the advantage of non-woven fibre always not be familiar with by machinery industry, rarely have the report of composite adopting non-woven fibre preparation to substitute steel.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 preparation method having needle punched non-woven fabrics composite 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 preparation method having needle punched non-woven fabrics composite of alternative metals, comprises the following steps:
1, adopt tensile strength to be greater than the high-intensity fiber of 0.8GPa as raw material, make the non-woven fabrics stock of non-glue spraying by needle punched non-woven fabrics production technology;
2, adopt dry method: cloth non-woven fabrics stock being cut into suitable dimension is inserted in the die cavity of mould, first compressed by cloth, then vacuumize die cavity, then resin by injection, be heating and curing sizing.
When described high-intensity fiber density is 1.3-1.6 gram every cubic centimetre, in step 2, first shock compaction, then compress.
The present invention also can adopt wet method:
1, adopt tensile strength to be greater than the non-woven fibre of 0.8GPa as raw material, make the non-woven fabrics stock of non-glue spraying by needle punched non-woven fabrics production technology;
2, non-woven fabrics stock being first dipped in intensity is greater than in the resin of 40MPa, takes out after resin impregnated, and insert in mould extruded by the cloth that the non-woven fabrics stock being soaked with resin is cut into suitable dimension, be heating and curing sizing.
The tensile strength of described high-intensity fiber is greater than 2.0GPa, to increase the structural strength of workpiece.
Beneficial effect of the present invention:
The present invention adopts high-strength chemical-fibre and resin-based compound, and chemical fibre adopts without spinning mode, and it specifically has following advantage:
1. 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.
2. 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.
3. 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.
4. interweave because non-woven fabrics exists thickness direction, more obvious after acupuncture, therefore made component shearing resistance and impact resistance stronger.Have needle punched non-woven fabrics relatively high without needle punched non-woven fabrics density, mold cavity decrement is little, and material thickness is less.Be mainly used in alternative stamping parts and the little die forging workpiece of thickness.
5., 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.
The test sample prepared by the inventive method is adopted to reach tensile strength 538MPa, reach the level of high-strength steel, if and do necessarily to optimize to resin and chemical fibre, then may obtain higher mechanical strength completely, therefore adopt the needle punched non-woven fabrics composite that has 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 schematic diagram of vertical Beam inner panel before the inventive method adopts dry process.
Fig. 2 is the bumper schematic diagram that the inventive method adopts dry process.
Fig. 3 is the container schematic diagram that the inventive method adopts dry process.
Fig. 4 is the thin-wall gear schematic diagram that the inventive method adopts dry process.
Fig. 5 is the motor rear cover schematic diagram that the inventive method adopts dry process.
Fig. 6 is the schematic diagram that the inventive method adopts wet-layer preparation front longitudinal girder inner plate.
Fig. 7 is the truck engine lid schematic diagram that the inventive method adopts wet-layer preparation.
Fig. 8 is the high ferro car door schematic diagram that the inventive method adopts wet-layer preparation.
Fig. 9 is the chemical logistic pipeline shell schematic diagram that the inventive method adopts wet-layer preparation.
Figure 10 is the decelerator lid schematic diagram that the inventive method adopts wet-layer preparation.
Detailed description of the invention
Embodiment 1
Vertical Beam inner panel dry fabrication before certain vehicle: its technique as shown in Figure 1, adopt the vinylon fibre raw material of hot strength 2.4GPa, 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 injecting tensile strength is 60MPa thermosetting phenolic resin, heating-up temperature is 80-120 degree, and temperature retention time is 1-1.5 hour, is shaped into workpiece.Product has better rigidity and tensile strength, and meanwhile, material, respectively to being tending towards the same sex, can bear higher impact and shearing force.
Embodiment 2
Certain bumper dry fabrication: adopt hot strength to be greater than 800MPa polyamide fibre, 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 15 ~ 20mm, 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 thermosetting phenolic resin is injected, by mold heated to 60-80 degree, insulation 40-60 minute, after the thorough solidifying and setting of resin, obtain workpiece, as shown in Figure 2.Material is respectively to being tending towards the same sex.
Embodiment 3
Container dry fabrication: adopt hot strength to be greater than the apple fiber of 3.5GPa, after completing shredding, combing, lapping operation by nonwoven production flow process, acupuncture is carried out to non-woven fabrics, make the non-woven fabrics stock that thickness is the non-glue spraying of 15 ~ 20mm, adopt dry method, cloth non-woven fabrics stock being cut into suitable dimension is inserted in the die cavity of mould, again die cavity is vacuumized, then thermosetting phenolic resin is injected, by mold heated to 80-120 degree, insulation 40-60 minute, after the thorough solidifying and setting of resin, obtain workpiece, as shown in Figure 3.Product has better rigidity and tensile strength, and meanwhile, material, respectively to being tending towards the same sex, can bear higher impact, shearing force and tensile force.
Embodiment 4
Thin-wall gear dry fabrication: adopt hot strength to be greater than the vinylon fibre of 3.0GPa, after completing shredding, combing, lapping operation by nonwoven production flow process, acupuncture is carried out to non-woven fabrics, make the non-glue spraying non-woven fabrics stock meeting gear thickness needs, adopt dry method, cloth non-woven fabrics stock being cut into suitable dimension is inserted in the die cavity of mould, again die cavity is vacuumized, then thermoset polyimide resin is injected, by mold heated to 80-120 degree, be incubated 60 minutes, after the thorough solidifying and setting of resin, obtain workpiece, as shown in Figure 4.The withstand shocks ability of power, bending force and tensile force of product is comparatively strong, especially has good wearability.
Embodiment 10
Certain motor rear cover dry fabrication: adopt hot strength to be greater than 800MPa, fibre density is the polyster fibre of 1.1-1.6 gram every cubic centimetre, shredding is completed by nonwoven production flow process, combing, after lapping operation, make the non-woven fabrics stock that thickness is the non-glue spraying of 15 ~ 20mm, adopt dry method, cloth non-woven fabrics stock being cut into suitable dimension is inserted in the die cavity of mould, compress after shock compaction, again die cavity is vacuumized, then thermosetting die resin is injected, by mold heated to 90-110 degree, be incubated 70 minutes, after the thorough solidifying and setting of resin, obtain workpiece, as shown in Figure 5.The withstand shocks ability of power, bending force and tensile force of product is stronger.
Embodiment 6
Certain vehicle front longitudinal girder inner plate wet method makes: its technique as shown in Figure 6, hot strength 1.9 ~ 3.5GPa terylene is adopted to be raw material, shredding is completed by nonwoven production flow process, combing, after lapping operation, acupuncture is carried out to non-woven fabrics, make the non-woven fabrics stock that thickness is the non-glue spraying of 15 ~ 20mm, adopt wet method, cloth non-woven fabrics stock being cut into suitable dimension is placed in polyimide resin fermentation vat, mechanical strength of resin is greater than 100MPa, after being soaked into, insert in die cavity, by mold heated to 180-200 degree, insulation 60-80 minute, after the thorough solidifying and setting of resin, obtain workpiece.Product has better rigidity and tensile strength, and meanwhile, material, respectively to being tending towards the same sex, can bear higher impact and shearing force.
Embodiment 7
Truck engine lid wet method makes: adopt hot strength to be greater than 3.0Gpa aramid fiber, after completing shredding, combing, lapping operation by nonwoven production flow process, acupuncture is carried out to non-woven fabrics, make the non-woven fabrics stock that thickness is the non-glue spraying of 15 ~ 20mm, the cloth that non-woven fabrics stock is cut into suitable dimension is placed in epoxy resin, and mold heated temperature is 120-140 degree, and temperature retention time is 60-80 minute, treat that the thorough solidifying and setting of resin becomes workpiece, as shown in Figure 7.Product has better rigidity and tensile strength, and meanwhile, material, respectively to being tending towards the same sex, can bear higher impact and shearing force.
Embodiment 8
High ferro car door wet method makes: adopt hot strength to be greater than the polyvinyl of 2.6GPa, after completing shredding, combing, lapping operation by nonwoven production flow process, acupuncture 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 polyimide resin fermentation vat, mechanical strength of resin is greater than 100MPa, after being soaked into, insert in die cavity, by mold heated to 180-200 degree, insulation 60-80 minute, after the thorough solidifying and setting of resin, obtain workpiece, as shown in Figure 8.Product has better rigidity and tensile strength, and meanwhile, material, respectively to being tending towards the same sex, can bear higher impact and shearing force.
Embodiment 9
Chemical logistic pipeline shell wet method makes: adopt hot strength to be greater than the polypropylene fibre of 2.0GPa, shredding is completed by nonwoven production flow process, combing, after lapping operation, acupuncture 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 epoxide modified corrosion-resisting resin fermentation vat, mechanical strength of resin is greater than 60MPa, after being soaked into, insert in die cavity, by mold heated to 80-100 degree, insulation 60-80 minute, after the thorough solidifying and setting of resin, obtain workpiece, as shown in Figure 9.Product has better rigidity and tensile strength, and meanwhile, material, respectively to being tending towards the same sex, can bear higher impact and shearing force.
Embodiment 10
Certain type speed reducer lid wet method makes: adopt hot strength to be greater than 800Mpa terylene, after completing shredding, combing, lapping operation by nonwoven production flow process, make the non-woven fabrics stock that thickness is the non-glue spraying of 10 ~ 25mm, cloth non-woven fabrics stock being cut into suitable dimension is placed in phenolic resins fermentation vat, mold heated temperature is 60-80 degree, temperature retention time is 40-60 minute, treats that the thorough solidifying and setting of resin becomes workpiece, as shown in Figure 10.Product has better rigidity and tensile strength.
Claims (4)
1. the preparation method having needle punched non-woven fabrics composite of alternative metals, is characterized in that comprising the following steps:
Step one, employing tensile strength are greater than the high-intensity fiber of 0.8GPa as raw material, make the non-woven fabrics stock of non-glue spraying by needle punched non-woven fabrics production technology;
Step 2, employing dry method: cloth non-woven fabrics stock being cut into suitable dimension is inserted in the die cavity of mould, and first compressed by cloth, then vacuumize die cavity, then resin by injection, be heating and curing sizing.
2. the preparation method having needle punched non-woven fabrics composite of alternative metals according to claim 1, when it is characterized in that described high-intensity fiber density is 1.3-1.6 gram every cubic centimetre, in step 2, first shock compaction, then compress.
3. the preparation method having needle punched non-woven fabrics composite of alternative metals, is characterized in that comprising the following steps:
Step one, employing tensile strength are greater than the non-woven fibre of 0.8GPa as raw material, make the non-woven fabrics stock of non-glue spraying by needle punched non-woven fabrics production technology;
Step 2, non-woven fabrics stock is first dipped in intensity is greater than in the resin of 40MPa, take out after resin impregnated, insert in mould extruded by the cloth that the non-woven fabrics stock being soaked with resin is cut into suitable dimension, be heating and curing sizing.
4. the preparation method having needle punched non-woven fabrics composite of the arbitrary alternative metals according to claims 1 to 3, is characterized in that the tensile strength of described high-intensity fiber is greater than 2.0GPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510344238.0A CN105014989A (en) | 2015-06-19 | 2015-06-19 | Preparation method of needle punched non-woven fabric composite material capable of replacing metal |
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| CN201510344238.0A CN105014989A (en) | 2015-06-19 | 2015-06-19 | Preparation method of needle punched non-woven fabric composite material capable of replacing metal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106418816A (en) * | 2016-08-31 | 2017-02-22 | 佛山市特纶纤维科技有限公司 | Preparation method of protective gloves |
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| 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 |
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2015
- 2015-06-19 CN CN201510344238.0A patent/CN105014989A/en active Pending
Patent Citations (2)
| 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 |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 任元林: "UHMWPE纤维及其非织造复合材料的制备与应用", 《纺织导报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106418816A (en) * | 2016-08-31 | 2017-02-22 | 佛山市特纶纤维科技有限公司 | Preparation method of protective gloves |
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Application publication date: 20151104 |