CN106182804A - The mould of composite pipe and forming method - Google Patents
The mould of composite pipe and forming method Download PDFInfo
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- CN106182804A CN106182804A CN201610695604.1A CN201610695604A CN106182804A CN 106182804 A CN106182804 A CN 106182804A CN 201610695604 A CN201610695604 A CN 201610695604A CN 106182804 A CN106182804 A CN 106182804A
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- composite pipe
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- metal outer
- outer mold
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- 239000002131 composite material Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 claims abstract description 38
- 239000012792 core layer Substances 0.000 claims abstract description 22
- 239000010410 layer Substances 0.000 claims abstract description 16
- 239000004677 Nylon Substances 0.000 claims abstract description 15
- 229920001778 nylon Polymers 0.000 claims abstract description 15
- 239000011162 core material Substances 0.000 claims description 37
- 239000000835 fiber Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 8
- 229920006327 polystyrene foam Polymers 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000002788 crimping Methods 0.000 claims description 2
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate Chemical compound [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 3
- 239000004917 carbon fiber Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229920006248 expandable polystyrene Polymers 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011365 complex material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000013036 cure process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention provides mould and the forming method of a kind of composite pipe, described mould includes metal outer mold, core and is arranged on the attachment structure at metal outer mold two ends；Being provided with through hole in the middle of described metal outer mold, core is arranged in through hole；Described metal outer mold is made up of upper metal outer mold and lower metal outer mold；Described core includes core layer and is sheathed on the Nylon Bag film layer of core layer outer surface.Composite pipe prepared by forming method of the present invention, has lower production cost compared with traditional moulding process, higher internal soundness, and more preferable product thickness uniformity can be according to product design drawing requirement molding all kinds of shape pipe fitting.
Description
Technical field
The invention belongs to technical field of composite material molding, be specifically related to mould and the one-tenth of a kind of composite pipe
Type method.
Background technology
Composite product has specific strength and specific modulus is high, designability is good, good insulation preformance, excellent chemically-resistant are rotten
The features such as erosion, mainly in high-technology field application such as space flight and aviation, defence and military, industrial and high-end physical culture.Particularly with
Field of aerospace, composite product, particularly composite pipe goods rise in the load-bearing truss of the aircraft such as satellite
To the most important effect.
Composite pipe, in forming process, usually uses expansion, negative and positive group in vacuum bag-autoclave, silicone rubber
Prepreg is implemented pressurization by the modes such as matched moulds, it is difficult to guarantee pressurization whole to prepreg, so be difficult to interiors of products defect with
And product size uniformity control effectively, have a strong impact on composite products quality.Especially lead in aerospace applications
Territory, interiors of products defect is required to conformance with standard GB2895 C level and more than, cause conforming product rate relatively low, significantly make
About product is in light-weighted application processes of military industry field structural member such as space flight and aviation.
By finding the retrieval of prior art, Chinese patent CN101879738B discloses the making of composite pipe
Method, this invention first uses and carries out laying pre-setting at internal stay mandrel, then extracts inner core out and be inserted into three-chip type active block
Non-circular internal stay mandrel is by means of silicon flexible pipe extrusion forming, it is ensured that the manufacturing process stability of product.But the method for
The overall dimensions of product controls to be difficult to ensure that, and mentioned internal stay needs two kinds of specifications and twice handling, and process is loaded down with trivial details.China
Patent CN103213285B discloses a kind of variable cross-section and closes the forming method of chamber composite material element, and the method uses multiple pressurization
Mode the composite material process planning deposited, prepared constant product quality model.But this inventive method needs preparation to produce
The components such as product transition core, silicone rubber, relatively costly, molding procedure is loaded down with trivial details." low-angle is wound around rectangle composite to periodical literature
The research of pipe " (fibrous composite, 2011,2,14-16) use Filament Winding Equipment to carry out fiber winding, and many to mould etc.
Aspect is optimized prepares satisfactory rectangle rod member, but its Design of Dies and manufacture level, the required precision of equipment and
There is certain restriction for the molding of composite pipe in the aspects such as work top, it is difficult to realizes the low cost of product, Gao Xing
Can preparation.
Summary of the invention
For defect of the prior art, it is an object of the invention to provide mould and the one-tenth of a kind of composite pipe
Type method.The present invention overlaps the core layer core as mould of Nylon Bag film, pressurized expansion molding in implementing using surface, has
The solution existing forming composite pipe complex process of effect, mould processing cost height, production of articles cost high to equipment requirements
Height, the weak points such as internal soundness is poor.
It is an object of the invention to be achieved through the following technical solutions:
The invention provides the mould of a kind of composite pipe, including metal outer mold, core be arranged on metal
The attachment structure at external mold two ends；Being provided with through hole in the middle of described metal outer mold, core is arranged in through hole；Described metal outer mold by
Upper metal outer mold and lower metal outer mold composition；Described core includes core layer and is sheathed on the Nylon Bag film layer of core surfaces.
Preferably, described Nylon Bag film layer is the bag film of tubular structure, and one end seals, and the other end connects inflating nozzle.Institute
Stating sealing can use sealing joint strip to carry out.
Preferably, described bag film thickness is not less than 0.03mm, more preferably 0.03mm～0.15mm, and elongation percentage is not less than
150%, heatproof is not less than 80 DEG C, pressure is not less than 5MPa.
Preferably, the one during the material of described core layer includes foam core material, wooden core, steel core.
Preferably, described foam core material is expandable polystyrene foam (EPS) core, and density is 5g/cm3~
50g/cm3。
Preferably, described metal outer mold is to mould (half) structure.
Preferably, described shape of through holes is identical with core layer external surface shape, through-hole wall and core layer outer surface away from
From the wall thickness for composite pipe.
Preferably, described shape of through holes and core layer external surface shape are designed according to the structure of pipe fitting and manufacture.
Preferably, described attachment structure includes front shroud and back shroud, front shroud respectively with upper metal outer mold and lower metal
The side of external mold connects, and back shroud opposite side with upper metal outer mold and lower metal outer mold respectively is connected, described connected mode bag
Include screw to connect；Being provided with the second through hole on described front shroud, inflating nozzle connects through the pipeline of the second through hole with compressed gas
Connect.
Present invention also offers the forming method of a kind of composite pipe, described forming method is for using aforesaid molding
Composite pipe prepared by mould, specifically includes following steps:
Laying step: by prepreg lay as requested in mandrel surface；
Matched moulds step: the core of prepreg puts into through hole, matched moulds by lay；
Curing schedule: be placed in curing apparatus by the mould after matched moulds and heat, inflating nozzle connects pressure simultaneously
Contracting gas gives cure under pressure to Nylon Bag film layer；
Demoulding step: open metal outer mold after solidification, extracts core out, obtains described composite pipe.
Preferably, described prepreg includes fiber reinforced epoxy resin prepreg, fibre reinforced phenolic resin prepreg, fibre
Dimension strengthens one or more in cyanate prepreg.
It is highly preferred that described fiber includes carbon fiber, glass fibre；More preferably carbon fiber is graphite fibre.
Preferably, one or more during described lay mode includes fiber winding, pipe crimping, manual laying.
Preferably, in curing schedule, described curing apparatus includes that hot press, autoclave, baking oven etc. can provide fire-bar
The equipment of part.
Preferably, in curing schedule, described compressed gas includes compressed air, compressed nitrogen etc., and its pressure is not less than
0.1MPa。
Compared with prior art, the present invention has a following beneficial effect:
1, using composite pipe prepared by mould of the present invention, in product, profile is because of the inflation of Nylon Bag film
And ensureing uniformity, the profile of product is ensured by metal outer mold, and then ensures the evenness of wall thickness of product.Use inner inflatable
Expanding, air pressure is adjustable, and prepared tubing products internal soundness is good, can reach in GB2895 internal flaw C level and more than
Requirement.Additionally, use expandable polystyrene foam as the core layer of molding core, in high temperature cure process, meeting is because being subject to
Heat and be punctured into the solid of micro volume, be drawn out of together with Nylon Bag film layer, it is to avoid the generation of fifth wheel.
2, use the inventive method mould to prepare composite pipe, for same root pipe fitting, there is different-thickness, with
And there is the pipe fitting of odd-shaped cross section or labyrinth all can be with disposal molding, manufacturability exploitativeness is strong, and product quality is steady
Qualitative good.
3, mould of the present invention is used to prepare composite pipe, for the equipment such as fiber winding machine, rolling machine without by force
Sexual demand processed, reduces the equipment investment in production process.
Accompanying drawing explanation
By the detailed description non-limiting example made with reference to the following drawings of reading, the further feature of the present invention,
Purpose and advantage will become more apparent upon:
Fig. 1 is the schematic diagram of mould of the present invention；
Fig. 2 is the core mold structure schematic diagram of mould of the present invention；
Wherein: the upper metal outer mold of 1-；Metal outer mold under 2-；3-core；4-front shroud；5-back shroud；6-core layer；7-Buddhist nun
Dragon bag film layer.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following example will assist in the technology of this area
Personnel are further appreciated by the present invention, but limit the present invention the most in any form.It should be pointed out that, the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement.These broadly fall into the present invention
Protection domain.
Embodiment 1
Present embodiments provide the mould of a kind of composite pipe, as depicted in figs. 1 and 2, including metal outer mold,
Core 3 and the attachment structure being arranged on metal outer mold two ends；Being provided with through hole in the middle of described metal outer mold, core is arranged on through hole
In；Described metal outer mold is made up of upper metal outer mold 1 and lower metal outer mold 2；Described core includes core layer 6 and is sheathed on core
The Nylon Bag film layer 7 of layer outer surface.
Described Nylon Bag film layer 7 is the bag film of tubular structure, and one end seals, and the other end connects inflating nozzle.
Described bag film thickness is 0.03mm～0.15mm, and elongation percentage is not less than 150%, and heatproof is not less than 80 DEG C, pressure not
Less than 5MPa.
Described core layer 6 is expandable polystyrene foam (EPS) core layer.
The density of described expandable polystyrene foam is 5g/cm3～50g/cm3。
Described metal outer mold is to mode structure.
Described shape of through holes is identical with core layer 6 external surface shape, and through-hole wall is multiple with the distance of core layer outer surface
The wall thickness of condensation material pipe fitting.
Described shape of through holes and core layer 6 external surface shape are designed according to the structure of pipe fitting and manufacture.
Described attachment structure includes front shroud 4 and back shroud 5, front shroud 4 respectively with upper metal outer mold 1 and lower metal outer mold
The side of 2 connects, and back shroud 5 opposite side with upper metal outer mold 1 and lower metal outer mold 2 respectively is connected, described connected mode bag
Include screw to connect.
Being provided with the second through hole on described front shroud 4, inflating nozzle is connected through the second through hole with the pipeline of compressed gas.
The present embodiment further relates to the forming method of a kind of composite pipe, uses the preimpregnation of carbon fiber epoxy hot melt
The exemplary complex material round bar of internal diameter 40mm, wall thickness 2mm prepared by material.Comprise the concrete steps that:
(1) the polystyrene foam cylinder core sheet material layers that external diameter is 40mm (-0.05mm ,-0.02mm) is prepared；
(2) using internal diameter is 40mm (-0.05mm, 0mm), and thickness is that the Nylon Bag film 7 of 0.05mm is sleeved on polystyrene
Foam cylinder core layer outer surface forms core 3；
(3) thickness in monolayer 0.2mm, surface density 200g/m are used2Carbon fiber epoxy hot melt prepreg at core 3
On carry out laying, ply stacking-sequence is [0/90/+45/-45/0] s, and the number of plies is 10 layers；
(4) being sealed Nylon Bag film layer 7 one end, one end connects inflating nozzle；
(5) above-mentioned blank is placed in mold cavity and matched moulds is fixed；
(6) mould installing blank being placed in hot press, inflating nozzle is connected with compressed air；
(7) according to 80 DEG C 1 hour+130 DEG C 3 hours, pressure is that the curing cycle of 0.5MPa carries out product curing molding；
(8) after being cooled to room temperature, the demoulding, repair burr, obtain composite round bar.
The composite round bar that the present embodiment prepares, after tested, wall thickness 2mm (+0.05mm ,-0.03mm), flaw detection meets
C level requirement in GB2895, fully meets the performance indications of the structural members such as China's aerospace model.
Composite round bar prepared by the present embodiment, compared with the process such as traditional fibre winding, not only reduces compound
The manufacturing cost of material molds and the restriction of equipment, and achieve material in terms of evenness of wall thickness, internal quality control
It is obviously improved.
Embodiment 2
Present embodiments provide mould and the forming method of a kind of composite pipe, with the difference of embodiment 1
It is: the cross sectional shape of prepared composite pipe is pentagon, prepared polystyrene foam core sheet material layers cross sectional shape
Also being pentagon, other mould structures, mould molding step and parameter are same as in Example 1.Gained composite pentagon pipe
The wall thickness of part is 2mm (0mm ,-0.05mm), and flaw detection meets A level requirement in GB2895.
In sum, compound for meeting in the high-technology fields such as space flight and aviation, defence and military, industrial and high-end physical culture
The application demand of material pipe fitting high quality and low cost, the present invention, through great many of experiments, uses Nylon Bag Membrane cover to be contained in polystyrene
Foams form core 3, and prepreg overlay is placed in the mould of half structure behind core 3 surface, expand through internal pressurising
Molding.Through lot of experiments checking and actual application, the composite pipe using the method to prepare, there is more conventional molding work
The production cost that skill is lower, higher internal soundness, more preferable product thickness uniformity, can become according to product design drawing requirement
Type all kinds of shape pipe fitting.Domestic there is no pertinent literature and patent report so far.
The concrete application approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention.It should be pointed out that, above
Embodiment is merely to illustrate the present invention, and is not limited to protection scope of the present invention.Common skill for the art
For art personnel, under the premise without departing from the principles of the invention, it is also possible to make some improvement, these improvement also should be regarded as this
Bright protection domain.
Claims (10)
1. the mould of a composite pipe, it is characterised in that include metal outer mold, core and be arranged on metal outer mold
The attachment structure at two ends；Being provided with through hole in the middle of described metal outer mold, core is arranged in through hole；Described metal outer mold is by upper gold
Belong to external mold and lower metal outer mold composition；Described core includes core layer and is sheathed on the Nylon Bag film layer of core layer outer surface.
2. the mould of composite pipe as claimed in claim 1, it is characterised in that described Nylon Bag film layer is tubulose
The bag film of structure, one end seals, and the other end connects inflating nozzle.
3. the mould of composite pipe as claimed in claim 2, it is characterised in that described bag film thickness is 0.03mm
～0.15mm, elongation percentage is not less than 150%, and heatproof is not less than 80 DEG C, pressure is not less than 5MPa.
4. the mould of composite pipe as claimed in claim 1, it is characterised in that the material of described core layer includes
One in foam core material, wooden core, steel core.
5. the mould of composite pipe as claimed in claim 4, it is characterised in that described foam core material is expandability
Polystyrene foam core material, density is 5g/cm3～50g/cm3。
6. the mould of composite pipe as claimed in claim 1, it is characterised in that described shape of through holes and core layer
External surface shape is identical, through-hole wall and the wall thickness that distance is composite pipe of core layer outer surface.
7. the mould of composite pipe as claimed in claim 1, it is characterised in that described attachment structure includes protecgulum
Plate and back shroud, front shroud is provided with the second through hole, and inflating nozzle is connected through the second through hole with the pipeline of compressed gas.
8. the forming method of a composite pipe, it is characterised in that described forming method is for using claim 1-7 arbitrary
Composite pipe prepared by mould described in Xiang, specifically includes following steps:
Laying step: by prepreg lay as requested in mandrel surface；
Matched moulds step: the core of prepreg puts into through hole, matched moulds by lay；
Curing schedule: be placed in curing apparatus by the mould after matched moulds and heat, inflating nozzle connects compressed gas simultaneously
Body gives cure under pressure to Nylon Bag film layer；
Demoulding step: open metal outer mold after solidification, extracts core out, obtains described composite pipe.
9. the forming method of composite pipe as claimed in claim 8, it is characterised in that described prepreg includes that fiber increases
One or more in strong epoxy prepreg, fibre reinforced phenolic resin prepreg, fiber reinforcement cyanate prepreg.
10. the forming method of composite pipe as claimed in claim 8, it is characterised in that described lay mode includes fibre
One or more in dimension winding, pipe crimping, manual laying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610695604.1A CN106182804A (en) | 2016-08-19 | 2016-08-19 | The mould of composite pipe and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610695604.1A CN106182804A (en) | 2016-08-19 | 2016-08-19 | The mould of composite pipe and forming method |
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| Publication Number | Publication Date |
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| CN106182804A true CN106182804A (en) | 2016-12-07 |
Family
ID=57523228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610695604.1A Pending CN106182804A (en) | 2016-08-19 | 2016-08-19 | The mould of composite pipe and forming method |
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| CN106553357A (en) * | 2016-11-09 | 2017-04-05 | 江苏恒神股份有限公司 | Hollow multi-cavity abnormal shape surface composite material complex structural member integral forming technique |
| CN107139359A (en) * | 2017-06-30 | 2017-09-08 | 山东非金属材料研究所 | Compression molding die with the composite product for extending laterally cavity |
| CN108115948A (en) * | 2017-12-26 | 2018-06-05 | 天津工业大学 | A kind of composite material shaping core and preparation method |
| CN108858911A (en) * | 2018-05-03 | 2018-11-23 | 威海光威复合材料股份有限公司 | A kind of 120 DEG C of lumen type mandrel molding methods |
| CN109466091A (en) * | 2018-07-17 | 2019-03-15 | 广州市勇源冰雪运动用品有限公司 | A kind of preparation method and ice stick of ice stick |
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| CN110228212A (en) * | 2019-07-08 | 2019-09-13 | 西安奥若特材料技术有限公司 | A kind of composite material shaping mould and its forming method based on air bag |
| CN110501197A (en) * | 2019-08-23 | 2019-11-26 | 上海复合材料科技有限公司 | Suitable for preparing the molding die of pour mass tensile sample |
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| CN116119054A (en) * | 2022-12-12 | 2023-05-16 | 中国科学院工程热物理研究所 | A kind of preparation method of the side vertical plate and the space curved pipe of the unmanned aerial vehicle with the joint wing layout |
| CN117944204A (en) * | 2024-03-26 | 2024-04-30 | 成都飞机工业（集团）有限责任公司 | Manufacturing die and manufacturing method for annular sandwich wave-absorbing structure |
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