CN103538267A - Magnetic force expansion forming method and mould - Google Patents
Magnetic force expansion forming method and mould Download PDFInfo
- Publication number
- CN103538267A CN103538267A CN201310470431.XA CN201310470431A CN103538267A CN 103538267 A CN103538267 A CN 103538267A CN 201310470431 A CN201310470431 A CN 201310470431A CN 103538267 A CN103538267 A CN 103538267A
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- mould
- push pedal
- prepreg
- resin
- magnetic force
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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
- B29C70/345—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 matched moulds
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a magnetic force expansion forming method and a mould. The magnetic force expansion forming method comprises the steps of arranging a push plate in a mould cavity of the mould according to the shape of a product, arranging electromagnets with repellent polarities during electrifying on the push plate and the mould opposite to the push plate; laying a raw material in the mould, then electrifying the electromagnets to ensure that the push plate moves for applying a pressure to the raw material and forming; and electrifying the electromagnets to ensure that the pushing plate makes an adverse movement for carrying out mould opening. Electromagnetism is applied to a material forming process, thus a new pressure source is provided; the quantity and the positions of the electromagnets are arranged according to the part structure requirement, and different pressurizing directions of different positions are realized; the magnetic force expansion forming method is mainly suitable for producing materials such as a resin-based composite material, and is capable of replacing a mould pressing process and an autoclave process under a certain conditions.
Description
Technical field
The present invention relates to forming materials technology field, be specifically related to a kind of magnetic force expansion molding method, and corresponding mould, be mainly applicable to the moulding process of polymer matrix composites material.
Background technology
Electromagnetic technique has been applied to the every field of productive life, as aspect and fields such as magnetic separator, electromagnetic flowmeter, Electromagnetic Simulation robot and life sciences, is a kind of working method of efficient, low consumption.It not only can avoid the friction loss, noise and the chip that cause, can also the extension device life-span, improve service condition and working environment.
At present, fiber reinforced thermosetting resin based composites moulding process has a variety of, comprising mould pressing process, laminating technology, vacuum tank technique, vacuum bag technique etc.These techniques are in forming process, and logical wirking pressure goes out bubble and unnecessary glue laminated, to reach construction profile and the fiber content of product requirement.This pressure transmittance process often needs a large amount of external equipment and external auxiliary material, and pressure is evenly distributed on product surface, is difficult to realize for the different pressures size of zones of different and the control of different pressures direction.And, under the trend of composite cost degradation, manufacturing process also towards low-cost, can flexible design, multiduty future development, and the equipment of above-mentioned pressure forming method is complicated, process costs is higher.
Summary of the invention
The object of this invention is to provide a kind of magnetic force expansion molding technique of utilizing magnetic force to realize, comprise corresponding mould structure and forming method, can carry out easily the moulding of the materials such as polymer matrix composites.
For achieving the above object, the present invention adopts following technical scheme:
An expansion molding method, its step comprises:
1) according to the shape of product, in the die cavity of mould, arrange push pedal, the electromagnet of polar repulsion while being arranged in energising in push pedal and on the mould relative with push pedal;
2) in mould, lay raw material, to electromagnet, energising makes push pedal campaign, by push pedal, raw material is exerted pressure and moulding;
3) to electromagnet, energising makes push pedal counter motion, carries out die sinking.
Further, lead is set in mould, by this lead, retrains the direction of motion of described push pedal.
Further, described raw material are resin-based prepreg, comprise one or more in chopped strand prepreg, two-dimentional long fibre prepreg, three-dimensional long fibre prepreg.
Further, in described resin-based prepreg, the material of prepreg fiber is one or more in carbon fiber, aramid fiber, glass fibre, polyethylene fiber peacekeeping polyester fiber, basalt fibre, and the material of prepreg resin is one or more in epoxy resin, phenolic resins, cyanate ester resin, bismaleimide resin, vinylite, unsaturated polyester resin.
Further, when described raw material are resin-based prepreg, step 2) according to the requirement of curing cycle, described resin-based prepreg is heated up, is incubated and process with curing molding.
Further, when described raw material are resin-based prepreg, first brushing releasing agent on push pedal and mould, then carry out step 2) described laying raw material; Step 2) make mold temperature be down to room temperature to 60 ℃ after completing, then carry out step 3).
Further, according to the shape of product and structural requirement, a plurality of push pedals are set, electromagnet is pre-buried to corresponding position in push pedal and in mould, realize the segmentation at each position and control separately.Further, electromagnet can arbitrarily remove and install, and can realize on different moulds and using, and reaches and can design and adjustable object.
An expansion molding mould, comprises die cavity, in described die cavity, is provided with push pedal, is respectively equipped with the electromagnet of polar repulsion when energising in described push pedal and on the mould relative with described push pedal.
Further, on mould, be fixed with the lead of the described push pedal campaign of constraint.
Further, described push pedal longitudinally arranges or is horizontally disposed with, and comprises one or more in following: end push pedal, thruster plate, push plate.
The present invention be electromagnetic application in forming materials technique, pre-buried magnet inside mould, utilizes the principle of " same sex repulsion " of magnet, expand in the space of realizing between mould and push pedal, thereby to raw material or prefabricated component pressurization.The present invention regulates the size of magnetic force to change with different parts and the pressurization of different periods realizing for composite material component by size of current, also can realize prediction die cavity inside pressure situation of change simultaneously.The present invention can arrange quantity and the position of electromagnet according to modular construction requirement, realizes the different compression aspect of different parts; Electromagnet also can arbitrarily remove and install, and can realize on different moulds and using, and reaches and can design and adjustable object.The present invention is mainly suitable for the manufacture of the materials such as polymer matrix composites, can replace mold pressing, autoclave technique, for moulding provides a kind of new pressure source under certain requirement.
Accompanying drawing explanation
Fig. 1 is the vertical section schematic diagram of mould in embodiment 1.
Fig. 2 is the two-dimentional prepreg composite material flat plate schematic diagram of embodiment 1 preparation.
Fig. 3 is the vertical section schematic diagram of mould in embodiment 2.
Fig. 4 is the top view of mould in embodiment 2.
Fig. 5 is the instrument rectangular box schematic diagram of embodiment 2 preparations.
Fig. 6 is the vertical section schematic diagram of mould in embodiment 3.
Fig. 7 is the band inserts member product schematic diagram of embodiment 3 preparations, and wherein (a) is front view, is (b) bottom view of (a).
Number in the figure explanation: 11-mould, 12-electromagnet, 13-push pedal, 14-bolt, 15-die cover plate; 21-external mold, 22-thruster plate, push pedal at the bottom of 23-, 24-bolt, 25-lead, 26-electromagnet, 27-core rod; 31-upper cover plate, the push pedal of 32-inserts, push pedal at the bottom of 33-, 34-bolt, 35-lead, 36-electromagnet, 37-external mold, 38-inserts.
The specific embodiment
Below by specific embodiments and the drawings, the present invention is described in detail.
The present invention be electromagnetic application in composite material process planning, pre-buried magnet inside mould, utilizes the principle of " same sex repulsion " of magnet, expand in the space of realizing between mould and push pedal, thereby to raw material or prefabricated component pressurization.In the present invention, apply electromagnetic force forming composite goods, under certain requirement, can replace mold pressing, autoclave technique.
Take polymer matrix composites as example, and the concrete steps of magnetic force expansion molding technique of the present invention are as follows:
Step 1: electromagnet is installed in mould, and every block of magnet has corresponding magnet, requires two blocks of corresponding magnet, in energising situation, can all realize repulsion.Electromagnet in mould connects power supply and electric control system.
The Distribution Principles of electromagnet: the installation of electromagnet in every push pedal is according to the structure of moulding distribution of force and product; During distribution, guarantee that push pedal moving direction meets technological requirement, and this moving direction direction ferreous with electromagnetism is consistent or approach unanimously, if desired in order to guarantee that push pedal can not be offset, adopts lead to retrain and leads.
Step 2: evenly brushing or spraying releasing agent on push pedal and mould, set bolt.
Step 3: by mould and the preheating of resin-based prepreg, according to the requirement of modular construction and design, lay resin-based prepreg; The range that push pedal and mould are realized, is the maximum process gap of considering in laying, and the gap generally reserving is below 20mm.
Step 4: mould is tightened with set bolt, and minimum leeway will be down in gap.
Step 5: energising, for prepreg, realize plus-pressure, by size of current and gap, can record magnetic force pressure size.
Step 6: according to curing cycle requirement, intensification, heat preservation solidification moulding; When mold temperature is down to room temperature～60 ℃, energising allows electromagnet pull push pedal counter motion, away from product, then disconnects electromagnet power supply, turns on set bolt, die sinking.
For difform product, illustrate the implementation process of said method below:
Embodiment 1: the preparation of two-dimentional prepreg composite material flat plate
Fig. 1 is the vertical section schematic diagram of mould in the present embodiment, and Fig. 2 is the schematic diagram of the two-dimentional prepreg composite material flat plate prepared of the present embodiment.The preparation process of this product is as follows:
Step 1: electromagnet 12 is installed to mould 11;
Step 2: even brushing silicone grease releasing agent on push pedal 13 and mould 11;
Step 3: the prepreg preheating of preheating is laid in mould 11; Process gap between reserved push pedal 13 and mould 11;
Step 4: die cover plate 15 use bolts 14 are tightened;
Step 5: energising, realizes plus-pressure for prepreg;
Step 6: temperature is risen to 170 ± 5 ℃, isothermal curing moulding;
Step 7: when mold temperature is down to below 60 ℃, the demoulding.
Embodiment 2: the preparation of certain instrument rectangular box
Fig. 3 is the vertical section schematic diagram of mould in the present embodiment, and Fig. 4 is the top view of this mould, and Fig. 5 is the instrument rectangular box schematic diagram of preparation.The preparation process of this product is as follows:
Step 1: electromagnet 26 is installed to mould;
Step 2: even brushing silicone grease releasing agent on core rod 27, thruster plate 22, end push pedal 23 and external mold 21;
Step 3: by core rod 27 intensification preheatings, lay the prepreg of modified epoxy carbon fiber;
Step 4: the process gap between reserved core rod 27 and push pedal 22,23 and external mold 21;
Step 5: mould is tightened with bolt 24;
Step 6: first by end push pedal 23 energisings, be pushed into the position of regulation, then, realize the energising of thruster plate, make it along lead 25 direction pressurizations;
Step 7: temperature is risen to 130 ± 5 ℃, isothermal curing moulding;
Step 8: when mold temperature is brought down below 60 ℃, die sinking.
Embodiment 3: with the manufacture of inserts member product
Fig. 6 is the vertical section schematic diagram of mould in the present embodiment, and Fig. 7 is the schematic diagram with inserts member product of preparation, and wherein (a) is front view, (b) is the bottom view of (a).
Product description: the yielding inserts 38 of the pre-buried pressurized in this product one end, other parts are composite.
The present embodiment arranges inserts push pedal 32 and end push pedal 33 according to the shape of this product, with the different parts segmentation to product, controls separately moulding.The preparation process of this product is as follows:
Step 1: electromagnet 36 is installed to mould 31;
Step 2: even brushing silicone grease releasing agent on inserts push pedal 32, end push pedal 33 and external mold 37;
Step 3: external mold 37 is warming up to 60 ℃, lays the prepreg of modified epoxy carbon fiber and inserts is installed;
Step 4: the process gap between reserved core rod 37 and push pedal 32,33 and external mold 31;
Step 5: mould is tightened with bolt 34;
Step 6: by the logical Bu Tong electric current of size of inserts push pedal 32 and end push pedal 33, make it to vary in size along lead 35 directional pressures;
Step 7: temperature is risen to 130 ± 5 ℃, isothermal curing moulding;
Step 8: when mold temperature is brought down below 60 ℃, die sinking.
Above embodiment is only in order to technical scheme of the present invention to be described but not be limited; those of ordinary skill in the art can modify or be equal to replacement technical scheme of the present invention; and not departing from the spirit and scope of the present invention, protection scope of the present invention should be as the criterion with described in claim.
Claims (10)
1. a magnetic force expansion molding method, its step comprises:
1) according to the shape of product, in the die cavity of mould, arrange push pedal, the electromagnet of polar repulsion while being arranged in energising in push pedal and on the mould relative with push pedal;
2) in mould, lay raw material, to electromagnet, energising makes push pedal campaign, by push pedal, raw material is exerted pressure and moulding;
3) to electromagnet, energising makes push pedal counter motion, carries out die sinking.
2. the method for claim 1, is characterized in that: lead is set in mould, retrains the direction of motion of described push pedal by this lead.
3. method as claimed in claim 1 or 2, is characterized in that: described raw material are resin-based prepreg, comprises one or more in chopped strand prepreg, two-dimentional long fibre prepreg, three-dimensional long fibre prepreg.
4. method as claimed in claim 3, it is characterized in that: in described resin-based prepreg, the material of prepreg fiber is one or more in carbon fiber, aramid fiber, glass fibre, polyethylene fiber peacekeeping polyester fiber, basalt fibre, and the material of prepreg resin is one or more in epoxy resin, phenolic resins, cyanate ester resin, bismaleimide resin, vinylite, unsaturated polyester resin.
5. method as claimed in claim 3, is characterized in that step 2) according to the requirement of curing cycle, described resin-based prepreg is heated up, is incubated and process with curing molding.
6. method as claimed in claim 3, is characterized in that: first brushing releasing agent on push pedal and mould, then carry out step 2) described laying raw material; Step 2) make mold temperature be down to room temperature～60 ℃ after completing, then carry out step 3).
7. method as claimed in claim 1 or 2, is characterized in that: according to the shape of product, a plurality of push pedals are set, segmentation are carried out in each position of product and control separately moulding.
8. a magnetic force expansion molding mould, comprises die cavity, it is characterized in that, in described die cavity, is provided with push pedal, is respectively equipped with the electromagnet of polar repulsion when energising in described push pedal and on the mould relative with described push pedal.
9. mould as claimed in claim 8, is characterized in that: the lead that is fixed with the described push pedal campaign of constraint on mould.
10. mould as claimed in claim 8 or 9, is characterized in that: described push pedal longitudinally arranges or is horizontally disposed with, and comprises one or more in following: end push pedal, thruster plate, push plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310470431.XA CN103538267B (en) | 2013-10-10 | 2013-10-10 | A kind of magnetic force expansion molding method and mould |
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| CN201310470431.XA CN103538267B (en) | 2013-10-10 | 2013-10-10 | A kind of magnetic force expansion molding method and mould |
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| CN103538267A true CN103538267A (en) | 2014-01-29 |
| CN103538267B CN103538267B (en) | 2016-08-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108673915A (en) * | 2018-05-18 | 2018-10-19 | 航天特种材料及工艺技术研究所 | Gas expansion molding die |
| CN108773090A (en) * | 2018-05-18 | 2018-11-09 | 航天特种材料及工艺技术研究所 | Gas expansion forming method |
| CN114248464A (en) * | 2021-11-24 | 2022-03-29 | 威海光威复合材料股份有限公司 | Carbon fiber composite material forming device and method |
| CN114311739A (en) * | 2021-12-06 | 2022-04-12 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Manufacturing method of strong corrosion-resistant lead-acid storage battery cover |
| CN116061467A (en) * | 2022-12-12 | 2023-05-05 | 安徽佳力奇先进复合材料科技股份公司 | Composite material forming device and forming method thereof |
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| CN101733906A (en) * | 2008-11-07 | 2010-06-16 | 郭先煌 | Injection-compression molding method and injection-compression mold |
| CN101977746A (en) * | 2008-04-04 | 2011-02-16 | 住友重机械工业株式会社 | Mold clamping apparatus |
| CN202225390U (en) * | 2011-09-29 | 2012-05-23 | 福建工程学院 | Clamping device for hemming mould |
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Patent Citations (4)
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| JPS63111039A (en) * | 1986-10-29 | 1988-05-16 | Agency Of Ind Science & Technol | Three-dimensional reinforced composite and its manufacture |
| CN101977746A (en) * | 2008-04-04 | 2011-02-16 | 住友重机械工业株式会社 | Mold clamping apparatus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108673915A (en) * | 2018-05-18 | 2018-10-19 | 航天特种材料及工艺技术研究所 | Gas expansion molding die |
| CN108773090A (en) * | 2018-05-18 | 2018-11-09 | 航天特种材料及工艺技术研究所 | Gas expansion forming method |
| CN114248464A (en) * | 2021-11-24 | 2022-03-29 | 威海光威复合材料股份有限公司 | Carbon fiber composite material forming device and method |
| CN114311739A (en) * | 2021-12-06 | 2022-04-12 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Manufacturing method of strong corrosion-resistant lead-acid storage battery cover |
| CN116061467A (en) * | 2022-12-12 | 2023-05-05 | 安徽佳力奇先进复合材料科技股份公司 | Composite material forming device and forming method thereof |
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| CN103538267B (en) | 2016-08-17 |
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