CN102173058B - Diversion method for composite vacuum perfusion molding process - Google Patents
Diversion method for composite vacuum perfusion molding process Download PDFInfo
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- CN102173058B CN102173058B CN 201010595147 CN201010595147A CN102173058B CN 102173058 B CN102173058 B CN 102173058B CN 201010595147 CN201010595147 CN 201010595147 CN 201010595147 A CN201010595147 A CN 201010595147A CN 102173058 B CN102173058 B CN 102173058B
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- permeable medium
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Abstract
The invention belongs to the field of composite molding processes and mainly provides a diversion method for a composite vacuum perfusion molding process. The diversion method comprises the steps of paving diversion mediums (5) on the upper surface of a dry fiber paving layer, wherein the intervals among the diversion mediums located on the upper surface of the dry fiber paving layer form a diversion medium partition area (8); overlapping a diversion bridge (9) between the adjacent diversion mediums (5) with the intervals, wherein the adjacent diversion mediums (5) with the intervals are communicated by the diversion bridge; and cooperating the diversion bridge (9) overlapped between the adjacent diversion mediums (5) with the intervals with the diversion medium partition area (8) formed by the intervals among the diversion mediums so as to control the dispersion speed of liquid resin on the upper layer of the paving layer and guarantee the permeation and dispersion speed of the liquid resin in a direction perpendicular to the paving layer which is the bottom layer, wherein the diversion bridge overlapped between the adjacent diversion mediums with the intervals is composed of the material which is same with the diversion mediums (5).
Description
Technical field
The invention belongs to the composite material process planning technical field, mainly propose a kind of method of river diversion of composite vacuum perfusion molding process.
Background technology
The vacuum infusion molding process for compound principle is: carry out dried fiber laying in composite material mould, lay permeable medium at dried fiber laying upper surface, then these dried layings and permeable medium are set up vacuum sealing system together with mould, last under vacuum pressure so that the dispersion complete wetting laying of liquid resin by permeable medium.
Permeable medium is to have certain thickness space reticulated, liquid resin is under vacuum pressure, be distributed to rapidly in these space network structures, realization is permeated surface and the bottom of dried fiber laying, and simultaneously by the space network structure eliminating liquid resin of permeable medium and the residual gas in the laying structure.In vacuum forming technique, permeable medium plays vital effect, liquid resin permeates at surface and bottom by permeable medium and is distributed in the dried fiber laying structure, realizes that finally whole dried fiber laying structure and liquid resin merge fully and solidify to form goods.And the space network structure of permeable medium can effectively be got rid of the residual gas in liquid resin and the laying structure, if these residual gas are stayed the stretch-proof that will cause goods in the laying structure, counter-bending, anti-shearing, resistance to compression reduction, affect goods service life and chemical resistance, weatherability when reducing Mechanical Properties of Products.
Some large-scale composite material product, such as: barge, blade of MW class wind turbine, motorbus ceiling, aircraft wing etc., because build is larger, shape is single, is particularly suitable for adopting vacuum infusion molding process for compound to manufacture.The technological process principle of these large components is identical, but during the product of moulding different model and specification need to according to properties of product require different lay disalignment to glass fibre, be generally single shaft to multiaxis to glass fibre, difference according to the laying machine direction, when the upper surface of these dried layings is laid permeable medium, need to be according to the different dry fiber of laying, different-thickness and design different permeable medium and cut off the district, purpose is so that the degree that liquid resin disperses in permeable medium is controlled, reaches suitable degree to realize the infiltration of liquid resin in top layer and bottom laying structure.Namely according to the dried fleece-laying of different-thickness, different directions, some zone of permeable medium, surface needs to lay, and some zone need not to lay, control liquid resin with this and disperse seepage velocity in laying superficial velocity and vertical direction, these zones of not laying permeable medium are the permeable medium exclusion region.The common vacuum infusion molding permeable medium paving mode that adopts of large-scale composite material product is seen Fig. 1 at present.
But in the priming by vacuum process, liquid resin because there is not the permeable medium peptizaiton, can cause by the permeable medium exclusion region time:
1, liquid resin is namely slightly being accelerated to the speed of bottom infiltration perpendicular to the laying direction.Be conducive to the infiltration of the larger laying structure of thickness.
2, liquid resin is almost completely lost in laying body structure surface speed, causes surperficial rate of dispersion extremely slow, and the liquid resin flowing velocity reduces greatly.The impact that produces is: molding time is long, production efficiency is low, liquid resin can not soak into the risk of doing laying fully and increases in the filling process.
3, residual gas can't be got rid of by permeable medium in liquid resin and the dried laying structure, simultaneously, gas floats to the laying upper strata in the liquid resin of infiltration and the bottom laying structure downwards, so that these gases all collect in the laying upper strata of permeable medium exclusion region, cause goods stretch-proof, counter-bending, anti-shearing, resistance to compression to reduce, affect goods service life and chemical resistance, weatherability when reducing the mechanical property of goods.
Therefore, the exclusion region of design permeable medium is necessary in the vacuum infusion molding process for compound, but can bring more negative issues simultaneously.
Summary of the invention
For solving these negative issues, the present invention proposes a kind of method of river diversion of composite vacuum perfusion molding process, making liquid resin is that speed that bottom infiltration disperse obtain coordinate with liquid resin in vertical laying direction at laying upper strata rate of dispersion, satisfy simultaneously liquid resin in the dispersion flows and the needs of liquid resin in vertical laying direction infiltration dispersion on laying upper strata, unnecessary gas can effectively be got rid of in liquid resin and the laying structure simultaneously, guarantees the goods total quality.
The present invention finishes the technical scheme that its invention task takes:
A kind of method of river diversion of composite vacuum perfusion molding process, the dried fiber laying upper surface of laying in composite material mould is laid permeable medium, described have the interval between the permeable medium of dried fiber laying upper surface, the interval between the described permeable medium consists of the permeable medium exclusion region; Between the spaced adjacent permeable medium of tool, overlap joint water conservancy diversion bridge, described water conservancy diversion bridge is that a plurality of and a plurality of described water conservancy diversion bridges are arranged on the permeable medium exclusion region at certain intervals; Described water conservancy diversion bridge will be communicated with between the spaced adjacent permeable medium of tool, and liquid resin by the permeable medium exclusion region, is distributed to adjacent permeable medium district by the water conservancy diversion bridge; The water conservancy diversion bridge that overlaps between the spaced adjacent permeable medium of tool, the permeable medium exclusion region that consists of with interval between the permeable medium cooperates, the control liquid resin at laying upper strata rate of dispersion, guarantee that liquid resin is the speed of bottom infiltration dispersion in vertical laying direction; The water conservancy diversion bridge that overlaps between the spaced adjacent permeable medium of described tool is made of the material identical with permeable medium.
The method of river diversion of the composite vacuum perfusion molding process that the present invention proposes, the water conservancy diversion bridge that overlaps between the spaced adjacent permeable medium of tool, the permeable medium exclusion region that consists of with interval between the permeable medium cooperates, the control liquid resin at laying upper strata rate of dispersion, guarantee that liquid resin is the speed of bottom infiltration dispersion in vertical laying direction; Simultaneously unnecessary gas can be got rid of by the water conservancy diversion bridge in liquid resin and the laying structure, so that the stretch-proof of laying structure, counter-bending, anti-shearing, resistance to compression raising; Goods service life and chemical resistance, weatherability improve, and guarantee large-scale vacuum perfusion goods total quality; And simple to operate, it is convenient to implement, and compares with traditional method of river diversion, liquid resin is all more efficient in the infiltration of the bottom of the infiltration on laying structure top layer, shortened goods molding time, improved the production efficiency of product.
Description of drawings
Fig. 1 is that large-scale composite material product vacuum infusion molding process for compound permeable medium is laid schematic diagram.
Fig. 2 is that large-scale composite material product vacuum infusion molding process for compound permeable medium of the present invention is laid schematic diagram.
Among the figure, 1, vacuum pumping opening, 2, ventilative medium, 3, exhaust pipe, 4, composite laying structure, 5, permeable medium, 6, the priming by vacuum pipeline, 7, liquid liquid resin inlet, 8, the permeable medium exclusion region, 9, the water conservancy diversion bridge.
The specific embodiment
By reference to the accompanying drawings, embodiments of the invention are illustrated:
As shown in Figure 2, the present invention has improved permeable medium paving mode in the traditional vacuum pouring and forming process, re-lays the permeable medium formation water conservancy diversion bridge of certain size in the exclusion region of traditional vacuum infusion molding process for compound laying permeable medium.
Embodiment 1:
The large-scale composite material wind-power blade vacuum infusion molding application example of the wide 5m of long 50m.
The 50m wind electricity blade is divided into upper-lower casing, and upper-lower casing adopts respectively vacuum infusion molding when moulding, after solidifying, upper-lower casing is sticked with glue that agent is bonding to become one again.The ply sequence of upper-lower casing and laying structure are in full accord, wherein arbitrary half housing that is referred to as.
Half housing is when moulding, mould at half housing is laid 3 layers of dried fibrage from the full surface of 10m to 50m along its length, lay along its length the composite girder that is formed by the one-way glass fibre preforms at 10m～50m, described girder is positioned at the center of mould width, the cellular type core material with the girder equal height is laid in the both sides of girder, then re-lays 3 layers of glass fibre on the surface of girder and cellular type core material.
Lay along its length two permeable mediums in the girder both sides at above-mentioned dried laying upper surface at last.This permeable medium consists of by having certain thickness space reticulated, its effect is when carrying out vacuum infusion molding, liquid resin is under vacuum pressure, can be distributed to rapidly in these space network structures, realization is permeated surface and the bottom of dried fiber laying, and simultaneously by the space network structure eliminating liquid resin of permeable medium and the residual gas in the laying structure.Has the interval between described two permeable mediums, described interval consists of the permeable medium exclusion region, the effect that exclusion region is set is so that resin reduces superficial velocity in exclusion region, accelerates the flowing velocity of bottom, so that liquid resin can permeate and be distributed to the crossbeam bottom.The width of described permeable medium exclusion region is 50～80mm (take room temperature as benchmark, the width of the higher interval region of environment temperature is larger, and the width of the lower interval region of environment temperature is less).In described permeable medium exclusion region a plurality of water conservancy diversion bridges being set is communicated with two exclusion region, spacing between the adjacent water conservancy diversion bridge is that 500～1000mm is (take room temperature as benchmark, spacing between the higher adjacent water conservancy diversion bridge of environment temperature is larger, and the spacing between the lower water conservancy diversion bridge of environment temperature is less).The purpose that the water conservancy diversion bridge is set is: water conservancy diversion bridge and permeable medium exclusion region cooperatively interact, and the control liquid resin is the speed that the bottom infiltration disperses at laying upper strata rate of dispersion, assurance liquid resin in vertical laying direction; Unnecessary gas can be got rid of by the water conservancy diversion bridge in liquid resin and the laying structure simultaneously.
Embodiment 2:
The large-scale composite material wind-power blade vacuum infusion molding application example of the wide 5m of length 50m.
The 50m wind electricity blade is divided into upper-lower casing, and upper-lower casing adopts respectively vacuum infusion molding when moulding, after solidifying, upper-lower casing is sticked with glue that agent is bonding to become one again.The ply sequence of upper-lower casing and laying structure are in full accord, wherein arbitrary half housing that is referred to as.
Half housing when moulding, the mould of lower house along its length in 0m to the 10m scope full surface lay 100 layers of dried fibrage.
Then lay two permeable mediums in above-mentioned dried laying upper surface broad ways.This permeable medium consists of by having certain thickness space reticulated, its effect is when carrying out vacuum infusion molding, liquid resin is under vacuum pressure, can be distributed to rapidly in these space network structures, realization is permeated surface and the bottom of dried fiber laying, and simultaneously by the space network structure eliminating liquid resin of permeable medium and the residual gas in the laying structure.Have the interval between described two permeable mediums, described interval consists of the permeable medium exclusion region, and the effect that exclusion region is set is so that resin reduces superficial velocity in the permeable medium exclusion region, accelerates liquid resin in dried laying bottom flowing velocity.The width of described permeable medium exclusion region is 30～50mm (take room temperature as benchmark, the width of the higher interval region of environment temperature is larger, and the width of the lower interval region of environment temperature is less).In described permeable medium exclusion region a plurality of water conservancy diversion bridges being set is communicated with two permeable medium exclusion region, spacing between the adjacent water conservancy diversion bridge is that 300～500mm is (take room temperature as benchmark, spacing between the higher adjacent water conservancy diversion bridge of environment temperature is larger, and the spacing between the lower water conservancy diversion bridge of environment temperature is less).Purpose is: water conservancy diversion bridge and flow medium exclusion region cooperatively interact, and the control liquid resin is the speed that the bottom infiltration disperses at laying upper strata rate of dispersion, assurance liquid resin in vertical laying direction; Unnecessary gas can be got rid of by the water conservancy diversion bridge in liquid resin and the laying structure simultaneously.
Claims (1)
1. the method for river diversion of a composite vacuum perfusion molding process, in composite material mould, carry out dried fiber laying, lay permeable medium (5) at dried fiber laying upper surface, described have the interval between the permeable medium of dried fiber laying upper surface, the interval between the described permeable medium consists of permeable medium exclusion region (8); It is characterized in that: between the spaced adjacent permeable medium of tool (5), overlap joint water conservancy diversion bridge (9), described water conservancy diversion bridge (9) is arranged on permeable medium exclusion region (8) at certain intervals for a plurality of and a plurality of described water conservancy diversion bridges; Described water conservancy diversion bridge will be communicated with between the spaced adjacent permeable medium of tool (5), and liquid resin by permeable medium exclusion region (8), is distributed to adjacent permeable medium district by water conservancy diversion bridge (9); The water conservancy diversion bridge (9) of overlap joint between the spaced adjacent permeable medium (5) of tool, the permeable medium exclusion region (8) that consists of with interval between the permeable medium cooperates, the control liquid resin at laying upper strata rate of dispersion, guarantee that liquid resin is the speed of bottom infiltration dispersion in vertical laying direction; The water conservancy diversion bridge that overlaps between the spaced adjacent permeable medium of described tool is made of the material identical with permeable medium (5).
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| CN102814996B (en) * | 2012-08-24 | 2014-11-19 | 中国人民解放军国防科学技术大学 | Preparing method of hybrid composite wing spar of large-scale wind power blade |
| CN107415278A (en) * | 2017-07-07 | 2017-12-01 | 咸宁海威复合材料制品有限公司 | The vacuum assisted resin infusion device and technique of a kind of composite |
| CN110328867B (en) * | 2019-07-05 | 2022-03-22 | 国电联合动力技术(连云港)有限公司 | Fan blade flow guide arrangement method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006039124A2 (en) * | 2004-09-29 | 2006-04-13 | The Boeing Company | Apparatuses, systems, and methods for manufacturing composite parts |
| CN101462360A (en) * | 2007-12-18 | 2009-06-24 | 上海玻璃钢研究院 | High-power wind mill blade root disposal vacuum auxiliary pouring and molding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006039124A2 (en) * | 2004-09-29 | 2006-04-13 | The Boeing Company | Apparatuses, systems, and methods for manufacturing composite parts |
| CN101462360A (en) * | 2007-12-18 | 2009-06-24 | 上海玻璃钢研究院 | High-power wind mill blade root disposal vacuum auxiliary pouring and molding method |
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