CN102514132A - Method for manufacturing shape memory polymer core mold by winding composite material component - Google Patents
Method for manufacturing shape memory polymer core mold by winding composite material component Download PDFInfo
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- CN102514132A CN102514132A CN201110448553XA CN201110448553A CN102514132A CN 102514132 A CN102514132 A CN 102514132A CN 201110448553X A CN201110448553X A CN 201110448553XA CN 201110448553 A CN201110448553 A CN 201110448553A CN 102514132 A CN102514132 A CN 102514132A
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Abstract
The invention discloses a method for manufacturing a shape memory polymer core mold by winding a composite material component. The method comprises the following steps of: 1, uniformly mixing hydrogenated epoxy resin, hexanediol diglycidyl ether and maleic anhydride according to the molar ratio of 0.5-1.0:0-0.4:2.0, and adding the mixture into a vacuum drying box to remove bubbles to obtain a hydrogenated epoxy resin system; 2, casting the hydrogenated epoxy resin system into a cylindrical mold, placing the cast mold in an oven to be cured, after cooling the mold to room temperature, demolding to obtain a hydrogenated epoxy resin blank; and 3, selecting a core mold shaping mold according to the shape of the required core mold, assembling the hydrogenated epoxy resin blank and the core mold shaping mold, deforming the hydrogenated epoxy resin blank into the shape of the core mold through a blow-moulding process, and cooling the hydrogenated epoxy resin blank to obtain the shape memory polymer core mold. The shape memory polymer core mold manufactured by the method is low in cost, high in efficiency and short in manufacturing period, can be repeatedly used and has obvious economic benefit; and demolding is convenient to perform.
Description
Technical field
The invention belongs to the core manufacture technology field, be specifically related to the Wrapping formed preparation method of a kind of composite element with the shape-memory polymer core.
Background technology
The fiber winding forming technology is meant continuous fiber and behind the impregnating resin glue, under the certain force of strain effect, is wound on the core according to certain rules, then the technology of curing molding.Divide dry method, wet method and three kinds of winding forms of semidry method.Be applicable to and make cylinder, cylinder, spheroid and some positive camber revolving body goods.This forming technique has that fiber content height, fibre strength are bringd into play, the fiber winding direction can change and is fit to advantage such as production in enormous quantities, has a wide range of applications in Aero-Space and civil area.
Composite element is Wrapping formed directly to influence dimensional accuracy of products, inner surface quality, cost and production cycle with core.The Wrapping formed technology of present domestic composite element adopts metal core, water-soluble core mould and metallic framework external application gypsic horizon combined type core mostly.The advantage of combined type core is that skeleton can reuse, but its complex structure, dismounting or gypsic horizon striking all need manual operations, and mechanization degree is low, and gypsic horizon is highly brittle simultaneously, easy of crack, the core yield rate is not high.Water-soluble core mould is from composite product, to remove than being easier to respect to the great advantage of metallic combination core; But core weight is excessive is the water-soluble core mould development key of restriction always; And its manufacturing process mostly belongs to manually-operated, and efficient is very low, has also restricted its development.Metal core cost is high, weight is big and be unfavorable for the molding component that draw ratio is bigger, makes its range of application also limited greatly.
Along with improving constantly of composite application requirements; The Wrapping formed integral rigidity to core material and core of composite element, axiality and assembling, dismounting etc. require increasingly high; And existing core cost is high, structure heavy stupid, weight is big; The assembling of core, dismounting and distortion all can't be satisfied further developing of composite winding technology, and it is necessary therefore to carry out the investigation of materials of light high-stiffness core.The continuous expansion of composite range of application simultaneously, demand continues to increase, and requires its rapid batch production, and this application study to easy-formation, the easy demoulding, lightweight, low-cost core material has proposed active demand.
Summary of the invention
Technical problem to be solved by this invention is the deficiency to above-mentioned prior art, provides a kind of composite element Wrapping formed preparation method with the shape-memory polymer core.This method adopts shape-memory polymer to make composite and twines the member core; Can realize the rapid shaping of core; The core of making is changed between elasticity and rigidity through shape-memory polymer, realizes form removal easily, and reaches reusable purpose; Final quick, efficient, the low cost of composite products of realizing made, and then promotes technological the applying and updating of advanced material.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the Wrapping formed preparation method with the shape-memory polymer core of a kind of composite element is characterized in that this method may further comprise the steps:
Step 2, make the hydrogenated epoxy resin blank: the system of hydrogenated epoxy resin described in the step 1 is poured into cylindric mould, and the mould after will pouring into a mould then places baking oven to solidify, be cooled to room temperature after the demoulding obtain the hydrogenated epoxy resin blank;
The mol ratio of hydrogenated epoxy resin, hexanediol diglycidyl ether and maleic anhydride described in the above-mentioned steps one is 0.6～0.9: 0.1～0.3: 2.0.
The system of solidifying described in the above-mentioned steps two is: be to solidify 2h～4h under 60 ℃～80 ℃ the condition in temperature, under temperature is 110 ℃～130 ℃ condition, solidify 2h～4h then, under temperature is 150 ℃～180 ℃ condition, solidify 0.5h～1.5h at last.
Mandrel molding mould described in the above-mentioned steps three adopts the form of distinguish former, the shape of mandrel molding mould inner surface with the core external surface shape that will make identical.
The mode of cooling described in the above-mentioned steps three is brushed for employing nitrogen or is adopted the running water cooling, perhaps adopts the running water cooling again for after adopting nitrogen to brush.
The used cylindric mould of hydrogenated epoxy resin system cast of the present invention is formed by connecting through bolt cylindric formpiston and cylindric former.
The method for using of shape-memory polymer core of the present invention is: according to conventional method composite is wound on the shape-memory polymer core and prepares composite element; Then the shape-memory polymer core is heated to more than the glass transition temperature of hydrogenated epoxy resin system; The core shape can return back to initial cylindric, at last the core of the recovery of shape opening part from composite element is taken out.
The present invention compared with prior art has the following advantages:
1, the present invention adopts shape-memory polymer to make composite and twines the member core; Can realize the rapid shaping of core; The core of making is changed between elasticity and rigidity through shape-memory polymer, realizes form removal easily, and reaches reusable purpose; Final quick, efficient, the low cost of composite products of realizing made, and then promotes technological the applying and updating of advanced material.
2, the shape-memory polymer core light weight that adopts the inventive method to make, proportion is less than 1.2g/cm
3, be about 1/7 of metal core proportion, 1/3 of core mould proportion.
3, the shape-memory polymer core that adopts the inventive method to make is simple in structure, adopts the blow molding process global formation, has avoided the bigger artificial assembly and disassembly operation of workload.
4, the shape-memory polymer core cost of the present invention's making is low, and efficient is high, and is reusable, and fabrication cycle is short, is convenient in demoulding, and has tangible economic benefit.
Below in conjunction with accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description.
Description of drawings
Fig. 1 is the structural representation of the cylindric mould of the present invention's employing.
Fig. 2 is the structural representation of the mandrel molding mould of first kind of specific embodiment employing of the present invention.
Fig. 3 is the structural representation of the mandrel molding mould of second kind of specific embodiment employing of the present invention.
Description of reference numerals:
The 1-formpiston; The 2-former; 3-end socket former;
4-tube section die; The last former of 5-; Former under the 6-.
The specific embodiment
Be used for the preparation of the Wrapping formed shape-memory polymer core of composite material pressure container:
Step 2, make the hydrogenated epoxy resin blank: the system of hydrogenated epoxy resin described in the step 1 is poured into cylindric mould, and the mould after will pouring into a mould then places baking oven to solidify, be cooled to room temperature after the demoulding obtain the hydrogenated epoxy resin blank; The system of said curing is: be to solidify 3h under 80 ℃ the condition in temperature, under temperature is 120 ℃ condition, solidify 3h then, under temperature is 180 ℃ condition, solidify 1h at last; As shown in Figure 1, said cylindric mould is formed by connecting through bolt cylindric formpiston 1 and cylindric former 2;
Present embodiment adopts the blow molding process global formation, has avoided the bigger artificial assembly and disassembly operation of workload, and the shape-memory polymer core of making is simple in structure, light weight, and proportion is less than 1.2g/cm
3, be about 1/7 of metal core proportion, 1/3 of core mould proportion, and core is reusable, has tangible economic benefit.
The shape-memory polymer core that adopts present embodiment to make prepares composite material pressure container; According to conventional method composite is wound on the shape-memory polymer core and prepares composite material pressure container; Then the shape-memory polymer core is heated to 140 ℃; The core shape can return back to initial cylindric, at last the core of the recovery of shape opening part from composite material pressure container is taken out.
Embodiment 2
Be used for the preparation of the Wrapping formed shape-memory polymer core of composite pipe:
Step 2, make the hydrogenated epoxy resin blank: the system of hydrogenated epoxy resin described in the step 1 is poured into cylindric mould, and the mould after will pouring into a mould then places baking oven to solidify, be cooled to room temperature after the demoulding obtain the hydrogenated epoxy resin blank; The system of said curing is: be to solidify 3h under 65 ℃ the condition in temperature, under temperature is 120 ℃ condition, solidify 3h then, under temperature is 150 ℃ condition, solidify 1h at last; As shown in Figure 1, said cylindric mould is formed by connecting through bolt cylindric formpiston 1 and cylindric former 2;
Present embodiment adopts the blow molding process global formation, has avoided the bigger artificial assembly and disassembly operation of workload, and the shape-memory polymer core of making is simple in structure, light weight, and proportion is less than 1.2g/cm
3, be about 1/7 of metal core proportion, 1/3 of core mould proportion, and core is reusable, has tangible economic benefit.
The shape-memory polymer core that adopts present embodiment to make prepares composite pipe; According to conventional method composite is wound on the shape-memory polymer core and prepares composite pipe; Then the shape-memory polymer core is heated to 110 ℃; The core shape can return back to initial cylindric, at last the core of the recovery of shape opening part from composite pipe is taken out.
Be used for the preparation of the Wrapping formed shape-memory polymer core of composite material pressure container:
Step 2, make the hydrogenated epoxy resin blank: the system of hydrogenated epoxy resin described in the step 1 is poured into cylindric mould, and the mould after will pouring into a mould then places baking oven to solidify, be cooled to room temperature after the demoulding obtain the hydrogenated epoxy resin blank; The system of said curing is: be to solidify 4h under 60 ℃ the condition in temperature, under temperature is 110 ℃ condition, solidify 4h then, under temperature is 160 ℃ condition, solidify 1.5h at last; As shown in Figure 1, said cylindric mould is formed by connecting through bolt cylindric formpiston 1 and cylindric former 2;
Present embodiment adopts the blow molding process global formation, has avoided the bigger artificial assembly and disassembly operation of workload, and the shape-memory polymer core of making is simple in structure, light weight, and proportion is less than 1.2g/cm
3, be about 1/7 of metal core proportion, 1/3 of core mould proportion, and core is reusable, has tangible economic benefit.
The shape-memory polymer core that adopts present embodiment to make prepares composite material pressure container; According to conventional method composite is wound on the shape-memory polymer core and prepares composite material pressure container; Then the shape-memory polymer core is heated to 130 ℃; The core shape can return back to initial cylindric, at last the core of the recovery of shape opening part from composite material pressure container is taken out.
Be used for the preparation of the Wrapping formed shape-memory polymer core of composite pipe:
Step 2, make the hydrogenated epoxy resin blank: the system of hydrogenated epoxy resin described in the step 1 is poured into cylindric mould, and the mould after will pouring into a mould then places baking oven to solidify, be cooled to room temperature after the demoulding obtain the hydrogenated epoxy resin blank; The system of said curing is: be to solidify 2h under 70 ℃ the condition in temperature, under temperature is 130 ℃ condition, solidify 3h then, under temperature is 150 ℃ condition, solidify 0.5h at last; As shown in Figure 1, said cylindric mould is formed by connecting through bolt cylindric formpiston 1 and cylindric former 2;
Present embodiment adopts the blow molding process global formation, has avoided the bigger artificial assembly and disassembly operation of workload, and the shape-memory polymer core of making is simple in structure, light weight, and proportion is less than 1.2g/cm
3, be about 1/7 of metal core proportion, 1/3 of core mould proportion, and core is reusable, has tangible economic benefit.
The shape-memory polymer core that adopts present embodiment to make prepares composite pipe; According to conventional method composite is wound on the shape-memory polymer core and prepares composite pipe; Then the shape-memory polymer core is heated to 100 ℃; The core shape can return back to initial cylindric, at last the core of the recovery of shape opening part from composite pipe is taken out.
Embodiment 5
Be used for the preparation of the Wrapping formed shape-memory polymer core of composite pipe:
Step 2, make the hydrogenated epoxy resin blank: the system of hydrogenated epoxy resin described in the step 1 is poured into cylindric mould, and the mould after will pouring into a mould then places baking oven to solidify, be cooled to room temperature after the demoulding obtain the hydrogenated epoxy resin blank; The system of said curing is: be to solidify 2h under 80 ℃ the condition in temperature, under temperature is 130 ℃ condition, solidify 2h then, under temperature is 150 ℃ condition, solidify 1h at last; As shown in Figure 1, said cylindric mould is formed by connecting through bolt cylindric formpiston 1 and cylindric former 2;
Present embodiment adopts the blow molding process global formation, has avoided the bigger artificial assembly and disassembly operation of workload, and the shape-memory polymer core of making is simple in structure, light weight, and proportion is less than 1.2g/cm
3, be about 1/7 of metal core proportion, 1/3 of core mould proportion, and core is reusable, has tangible economic benefit.
The shape-memory polymer core that adopts present embodiment to make prepares composite pipe; According to conventional method composite is wound on the shape-memory polymer core and prepares composite pipe; Then the shape-memory polymer core is heated to 120 ℃; The core shape can return back to initial cylindric, at last the core of the recovery of shape opening part from composite pipe is taken out.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any restriction, every according to inventing technical spirit to any simple modification, change and equivalent structure variation that above embodiment did, all still belong in the protection domain of technical scheme of the present invention.
Claims (5)
1. Wrapping formed preparation method with the shape-memory polymer core of composite element is characterized in that this method may further comprise the steps:
Step 1, preparation hydrogenated epoxy resin system: with hydrogenated epoxy resin, hexanediol diglycidyl ether and maleic anhydride by 0.5～1.0: put into vacuum drying chamber after 0～0.4: 2.0 mixed in molar ratio is even; Be to remove bubble 5min～15min under 50 ℃～60 ℃ the condition in temperature, obtain the hydrogenated epoxy resin system;
Step 2, make the hydrogenated epoxy resin blank: the system of hydrogenated epoxy resin described in the step 1 is poured into cylindric mould, and the mould after will pouring into a mould then places baking oven to solidify, be cooled to room temperature after the demoulding obtain the hydrogenated epoxy resin blank;
Step 3, making core: the shape according to required core is selected the mandrel molding mould; With blank of hydrogenated epoxy resin described in the step 2 and the assembling of mandrel molding mould; Adopting the hydrogenated epoxy resin blank after blow molding process will be assembled is 90 ℃～140 ℃ in temperature; Pressure is pressurize 10min～20min under the condition of 0.2MPa～0.6MPa, makes the hydrogenated epoxy resin blank be deformed into the core shape, and the cooling back demoulding obtains the shape-memory polymer core.
2. the Wrapping formed preparation method of composite element according to claim 1 with the shape-memory polymer core; It is characterized in that the mol ratio of hydrogenated epoxy resin described in the step 1, hexanediol diglycidyl ether and maleic anhydride is 0.6～0.9: 0.1～0.3: 2.0.
3. the Wrapping formed preparation method of composite element according to claim 1 with the shape-memory polymer core; It is characterized in that; The system of solidifying described in the step 2 is: be to solidify 2h～4h under 60 ℃～80 ℃ the condition in temperature; Under temperature is 110 ℃～130 ℃ condition, solidify 2h～4h then, under temperature is 150 ℃～180 ℃ condition, solidify 0.5h～1.5h at last.
4. the Wrapping formed preparation method of composite element according to claim 1 with the shape-memory polymer core; It is characterized in that; The mould of mandrel molding described in the step 3 adopts the form of distinguish former, the shape of mandrel molding mould inner surface with the core external surface shape that will make identical.
5. the Wrapping formed preparation method of composite element according to claim 1 with the shape-memory polymer core; It is characterized in that; The mode of cooling off described in the step 3 is brushed cooling or is adopted the running water cooling for adopting nitrogen, perhaps adopts the running water cooling again for after adopting nitrogen to brush.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216844A (en) * | 2019-07-22 | 2019-09-10 | 哈尔滨工业大学 | A kind of mold of deformable duct |
| CN112008920A (en) * | 2020-07-31 | 2020-12-01 | 湖北三江航天江北机械工程有限公司 | Core mold for producing rocket engine composite material shell and forming method thereof |
| CN112452369A (en) * | 2020-11-24 | 2021-03-09 | 东南大学 | Magnetic control thermoplastic shape memory polymer wrapped heating platform and method |
| CN112571822A (en) * | 2020-10-29 | 2021-03-30 | 上海新力动力设备研究所 | Memory non-metal core mold structure suitable for winding with medicine and shell forming method |
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| WO2008127806A1 (en) * | 2007-03-07 | 2008-10-23 | Cornestone Research Group, Inc. | Venting mechanisms for containers |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110216844A (en) * | 2019-07-22 | 2019-09-10 | 哈尔滨工业大学 | A kind of mold of deformable duct |
| CN110216844B (en) * | 2019-07-22 | 2021-06-18 | 哈尔滨工业大学 | Mould of flexible pipeline |
| CN112008920A (en) * | 2020-07-31 | 2020-12-01 | 湖北三江航天江北机械工程有限公司 | Core mold for producing rocket engine composite material shell and forming method thereof |
| CN112571822A (en) * | 2020-10-29 | 2021-03-30 | 上海新力动力设备研究所 | Memory non-metal core mold structure suitable for winding with medicine and shell forming method |
| CN112452369A (en) * | 2020-11-24 | 2021-03-09 | 东南大学 | Magnetic control thermoplastic shape memory polymer wrapped heating platform and method |
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