CN104908337A - Production method for control of composite material vacuum auxiliary moulding thickness - Google Patents
Production method for control of composite material vacuum auxiliary moulding thickness Download PDFInfo
- Publication number
- CN104908337A CN104908337A CN201510207044.6A CN201510207044A CN104908337A CN 104908337 A CN104908337 A CN 104908337A CN 201510207044 A CN201510207044 A CN 201510207044A CN 104908337 A CN104908337 A CN 104908337A
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- thickness
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- control
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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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 present invention provides a production method for control of composite material vacuum auxiliary moulding thickness, according to the method, resin is filled the entire cavity, and when the resin reaches the exhaust tube position, the resin injection is continued for effective control of the thickness of a composite part. By determining the continued resin injection time, each batch molding thickness uniformity can be ensured, and normal implement of composite VARI molding process is not affected. According to the method, in the case of no change of composite part VARI molding process equipment, the purpose of control of the thickness of the composite part can be achieved only by the resin injection time in the VARI molding process, and the problems that the thickness of the composite part in the VARI molding process is difficult to control and unstable can be effectively solved. The method is suitable for industrialized production, and has great application value.
Description
Technical field
The present invention relates to the forming method of the large-scale product of composite, be specifically related to a kind of manufacture method controlling composite product vacuum assisted resin infusion thickness.
Background technology
Vacuum assistant resin infused (VARI-Vacuum Assisted Resin Infusion) is a kind of forming technique of the novel large-scale product of low cost composite.It is the gas got rid of under vacuum conditions in fibre reinforcement, utilizes the flowing of resin, infiltration, realizes fiber and textile impregnation thereof, and is cured under certain temperature conditions, forms the process of the composite product of certain resin/proportion of fibers.VARI forming technique has fiber without the need to preimpregnation, and solidification without the need to carrying out in autoclave, significantly can reduce manufacturing cost, and the advantage such as shaping goods porosity is low.But because VARI technique only adopts one side rigid die, another side is flexible vacuum bag, so just directly cannot control the shaping thickness of product, and batch product molding thickness manufactured is also unstable, is difficult to the matching requirements meeting structure, therefore, urgently improves.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned weak point, and research and design can control composite product thickness, meets the manufacture method of matching requirements.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
The invention provides a kind of manufacture method controlling composite vacuum assisted resin infusion thickness, the method is full of whole die cavity at resin, after reaching exhaust tube position, then continues resin by injection, by controlling different resin injection period, effectively control the thickness of composite product.
The present invention is full of whole die cavity at resin, after reaching exhaust tube position, controls the time of continuing injecting resin, effectively can control the thickness of composite product.By determining the time of continuing injecting resin, each batch of product molding thickness can be controlled, and guarantee the uniformity of thickness.
The present inventor finds through overtesting, and the thickness of VARI forming composite product changes with continuation resin injection period.Therefore, after reaching exhaust tube position by control resin, continue the time of injecting resin, effectively control the thickness of composite product, and do not affect the normal enforcement of composite VARI moulding process.In addition, result of study shows, and the time of described continuation injecting resin is inversely proportional to the thickness manufacturing product, and when manufacturing the product of heavy thickness, the time of continuing injecting resin is short, and when manufacturing the product of little thickness, the time of continuing injecting resin is long.
The time of described continuation injecting resin is 0-2500 second; The thickness manufacturing product is 2.020-2.195 millimeter.
The inventive method is not when changing the equipment of composite product VARI moulding process, only need change the time of injecting resin in VARI technical process, the object controlling product thickness can be reached, efficiently solve VARI technological forming composite product thickness and be difficult to control and the problem of instability.The inventive method is suitable for suitability for industrialized production, has larger using value.
Accompanying drawing explanation
Fig. 1 VARI moulding process sealed in unit schematic diagram
1-resin, 2-injection-tube, 3-vacuum bag, 4-flow-guiding screen, 5-release cloth, 6-fabric, 7-exhaust tube, 8-vacuum meter, 9-vavuum pump, 10-resin trap, 11-airfelt, 12-releasing agent, 13-sealing joint strip, 14-mould
The thickness of Fig. 2 product is with the change curve continuing resin injection period
Ordinate is the thickness (mm) of product, and abscissa is for continuing resin injection period (second)
The thickness measuring position of Fig. 3 product
17-be the test position of embodiment product thickness 1., be positioned near injection-tube;
18-be the test position of embodiment 2 product thickness 2., be positioned at product medium position;
19-be the test position of embodiment 3 product thickness 3., be positioned near exhaust tube.
Detailed description of the invention
Embodiment 1 controls the manufacture of composite product vacuum assisted resin infusion product thickness
The present embodiment adopts VARI moulding process sealed in unit as shown in Figure 1:
Wherein 1-resin, 2-injection-tube, 3-vacuum bag, 4-flow-guiding screen, 5-release cloth, 6-fabric, 7-exhaust tube, 8-vacuum meter, 9-vavuum pump, 10-resin trap, 11-airfelt, 12-releasing agent, 13-sealing joint strip, 14-mould.
The present embodiment employing injection viscosity is the epoxy resin CYCOM890 of 200cps, and injection temperature is 90 DEG C, and surface density is 267g/m
2± 45 ° of biaxially carbon fiber non-crimp fabric 267gsm/ (+45 ,-45)/HTS40 F13 12K 800Tex/1500mm, total laying is 8 layers, and ply stacking-sequence is [± 45 °]
8.The fabric cut according to mold cavity size is laid on mould, arranges resin flow channel and vacuum passage, then encapsulate at die edge sealing joint strip and vacuum bag, as shown in Figure 1.Treat fabric compacting, in die cavity, vacuum reaches 0.1MPa, opens pitch tube, injecting resin, reach behind exhaust tube position until resin, continue injecting resin 10 minutes, close injection-tube, mould is warming up to 180 DEG C, is incubated 2 hours, solidification, the demoulding obtains composite vacuum assisted resin infusion product, and product thickness is 2.192-2.198mm.Fig. 3 is seen in concrete thickness measuring position, and 3 linear positions of Fig. 3 display on average get 5 points, adopts slide measure to test thickness.
Embodiment 2
Method is with embodiment 1, and injecting resin, reaches behind exhaust tube position until resin, and continue injecting resin 40 minutes, obtain composite vacuum assisted resin infusion product, product thickness is 2.019-2.024mm.Fig. 3 is seen with embodiment 1 in concrete thickness measuring position.
Embodiment 3
Method is with embodiment 1, and injecting resin, reaches behind exhaust tube position until resin, close exhaust tube immediately, obtains composite vacuum assisted resin infusion product, and product thickness is 2.084-2.090mm.Fig. 3 is seen with embodiment 1 in concrete thickness measuring position.
Embodiment 1,2,3 thickness measuring data are in table 1.
Table 1 thickness measuring data
The thickness of the final product that embodiment 1,2 and 3 is obtained is with continuing the change of injecting glue time as shown in Figure 2.Show in figure, the time of described continuation injecting resin is inversely proportional to the thickness manufacturing product, continuing the injecting resin time is zero, namely resin reaches exhaust tube position and closes resin injection-tube immediately, the thickness of product is 2.08mm, the position still continuous injection resin about 10 minutes of exhaust tube is arrived at resin, product thickness is maximum, for 2.19mm, thickness increases about 5.3%, in the position of resin arrival exhaust tube, still the continuous injection resin time is about 40 minutes, product thickness is minimum, for 2.02mm, about 2.9% is reduced than the product thickness not continuing resin injection.
Claims (3)
1. control a manufacture method for composite vacuum assisted resin infusion thickness, it is characterized in that, the method is full of whole die cavity at resin, after reaching exhaust tube position, then continues injecting resin, effectively to control the thickness of composite product.
2. a kind of manufacture method controlling composite vacuum assisted resin infusion thickness according to claim 1, it is characterized in that, the time of described continuation injecting resin is inversely proportional to the thickness manufacturing product, when manufacturing the product of heavy thickness, the time of continuing injecting resin is short, when manufacturing the product of little thickness, the time of continuing injecting resin is long.
3. a kind of manufacture method controlling composite vacuum assisted resin infusion thickness according to claim 2, it is characterized in that, the time of described continuation injecting resin is 0-2500 second; The thickness manufacturing product is 2.020-2.195 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510207044.6A CN104908337A (en) | 2015-04-28 | 2015-04-28 | Production method for control of composite material vacuum auxiliary moulding thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510207044.6A CN104908337A (en) | 2015-04-28 | 2015-04-28 | Production method for control of composite material vacuum auxiliary moulding thickness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104908337A true CN104908337A (en) | 2015-09-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510207044.6A Pending CN104908337A (en) | 2015-04-28 | 2015-04-28 | Production method for control of composite material vacuum auxiliary moulding thickness |
Country Status (1)
| Country | Link |
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| CN (1) | CN104908337A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105751529A (en) * | 2016-03-30 | 2016-07-13 | 吉林重通成飞新材料股份公司 | Unidirectional cloth manufacturing system and layout method thereof |
| CN113232325A (en) * | 2021-03-31 | 2021-08-10 | 成都飞机工业（集团）有限责任公司 | Method for controlling thickness of composite material workpiece |
| CN114654758A (en) * | 2020-12-24 | 2022-06-24 | 上海飞机制造有限公司 | Method for improving sewing and VARI forming quality of high-temperature curing resin-based composite material |
-
2015
- 2015-04-28 CN CN201510207044.6A patent/CN104908337A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 潘利剑 等: "真空辅助成型工艺中预成型体的厚度变化与过流控制", 《复合材料学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105751529A (en) * | 2016-03-30 | 2016-07-13 | 吉林重通成飞新材料股份公司 | Unidirectional cloth manufacturing system and layout method thereof |
| CN114654758A (en) * | 2020-12-24 | 2022-06-24 | 上海飞机制造有限公司 | Method for improving sewing and VARI forming quality of high-temperature curing resin-based composite material |
| CN114654758B (en) * | 2020-12-24 | 2023-11-28 | 上海飞机制造有限公司 | Method for improving stitching and VARI forming quality of high temperature cured resin matrix composite |
| CN113232325A (en) * | 2021-03-31 | 2021-08-10 | 成都飞机工业（集团）有限责任公司 | Method for controlling thickness of composite material workpiece |
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Application publication date: 20150916 |
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