CN105034408A - Method for manufacturing fiber reinforced composite product through resin pocket pressing - Google Patents
Method for manufacturing fiber reinforced composite product through resin pocket pressing Download PDFInfo
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- CN105034408A CN105034408A CN201510410685.1A CN201510410685A CN105034408A CN 105034408 A CN105034408 A CN 105034408A CN 201510410685 A CN201510410685 A CN 201510410685A CN 105034408 A CN105034408 A CN 105034408A
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- resin
- mould
- fibre reinforced
- pressure
- deformation
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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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
-
- 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/446—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
-
- 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/462—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
-
- 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
-
- 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
- B29C70/546—Measures for feeding or distributing the matrix material in the reinforcing structure
- B29C70/548—Measures for feeding or distributing the matrix material in the reinforcing structure using distribution constructions, e.g. channels incorporated in or associated with the mould
Abstract
The invention provides a method for manufacturing a fiber reinforced composite product through resin pocket pressing. The method comprises the steps of FRP hand lay-up, vacuum diversion, RTM and light RTM. On the premise that a diversion channel device is not arranged, resin required by product molding can be injected quickly, and mold filling is complete. Due to the fact that a deformable soft film can move towards a hard film for compaction under the action of pressure difference, the fiber reinforced material is more compact, the fiber content of a product is increased, maximization of the fiber content can be realized, and control over quality and cost is facilitated. Due to the fact that a resin pocket is adopted for forming a resin diversion channel, the diversion device does not need to be additionally arranged, the manufacturing cost of the product is reduced, and environment friendliness is realized.
Description
Technical field
The present invention relates to a kind of fibre reinforced composites article fabrication methods, particularly a kind of method adopting pressurizing resin capsule legal system to make fibre reinforced composites goods.
Background technology
Glass fibre (English original name is: glassfiber or fiberglass) is a kind of Inorganic Non-metallic Materials of excellent performance, of a great variety, has good insulating, heat resistance is strong, corrosion resistance good, the advantage that mechanical strength is high.Along with developing rapidly of market economy, glass fibre become gradually building, traffic, electronics, electrically, chemical industry, metallurgy, environmental protection, the requisite raw material of industry such as national defence.
Glass fibre is typically used as the reinforcing material in composite, when adopting glass fibre to make composite product, its principle is: fiber glass reinforcement is fully flooded by resin in mould, get rid of bubble, then resin is in normal temperature or lower solidification of heating, and namely becomes composite product after the demoulding.
Current known employing glass fibre makes composite product technique and mainly comprises hand paste FRP method, vacuum diversion method, RTM method, lightweight RTM method, specific as follows:
hand sticks with paste method:utilize and manually resin and fibre reinforced materials are carried out flooding, being vented, greatly, working environment is poor for its inefficiency, pollution.
vacuum diversion method:its mould comprises die and covers the sealing film (i.e. soft mode) on die, and arranges flow-guiding channel under sealing film; Utilize negative pressure and flow-guiding channel to coordinate resin by injection, and make sealing film press down realization by negative pressure to fill type, dipping, its shortcoming is: (1) need arrange flow-guiding channel, and cost is higher; (2) resin injection and follow-up fill completely type, dipping pressure differential by vacuumizing realization, its relative pressure difference has ceiling restriction; (3) dies cavity easily causes the volatilization of constituent part in resin under vacuumizing state, and then affects quality and the performance of glass fiber compound material.
rTM method:its mould adopts two die structure, utilize malleation by resin injection die cavity, and realize filling type, dipping, it compares vacuum diversion method without the need to configuring flow-guiding channel, and relative pressure difference can easily more than a standard atmospheric pressure, without too large ceiling restriction, but also there is certain shortcoming: (1) malleation resin by injection, easily causing short circuit when filling type, even if under its packing state, also possibly cannot get rid of gas in mould completely, cause that to fill type not thorough; (2) fiber content is low.
lightweight RTM method:the semihard plasma membrane (i.e. soft mode) that its mould adopts die and covers on die, it arranges resin guide runner in the periphery of mould, and the mode resin by injection by vacuumizing the center of mould, by the mode of pressure differential, semihard plasma membrane is pressed down realization and fill type, dipping; Also there is certain deficiency in it: (1) resin guide runner is arranged on mould periphery, and the resin in runner also can solidify when urethane cure is shaped, and causes the waste of this part resource, adds cost.
Therefore, research and develop and a kind ofly fill that type is complete, efficiency is high and the fibre reinforced composites article fabrication methods that cost is low.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method adopting pressurizing resin capsule legal system to make fibre reinforced composites goods, can inject resin needed for product molding fast, fill type complete while arranging flow-guiding channel device.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of method adopting pressurizing resin capsule legal system to make fibre reinforced composites goods, and its innovative point is that described step is:
step S1mould preparatory process: mould comprises hard mould and can the soft film of deformation, by hard mould with can combine the goods die cavity forming goods by the soft film of deformation, mould has at least one inlet being positioned at low level and at least one outlet higher than inlet; Fibre reinforced materials is placed in the goods die cavity of mould, and can the soft mould of deformation will make fibre reinforced materials be pressed in hard mould to hard mould by external force;
step S2resin perfusion operation: by resin with injection pressure from mould inlet note into, in this process, the fibre reinforced materials gap near inlet side constantly filled by resin, start to fill type and dipping, progressively can strut the inlet side resin cyst heaved and form holding portion resin laterally by the soft film of deformation simultaneously; Resin by injection is continued after forming inlet side resin cyst, the fibre reinforced materials gap that resin enters outlet side by the flow-guiding channel of inlet side resin cyst formation and the fibre reinforced materials gap of inlet side simultaneously proceeds to fill type and dipping, and resin cyst constantly extends to outlet side; Wherein, injection pressure is P
fill, mould can deformation soft film side ambient pressure be P
outward, mould outlet pressure is P
row, in this step, resin is fully filled, the impregnation pressure be impregnated in each gap of fibre reinforced materials is P
leaching, and P
leaching=P
fill>=P
outward>=P
row,
step S3pressure capsule dipping process: close inlet and stop resin by injection, in extraneous pressure P
outwardeffect bed die can the soft mould of deformation to fibre reinforced materials, realize pressure capsule dipping, in this step, resin is fully filled, the impregnation pressure be impregnated in each gap of fibre reinforced materials is P
leaching, P
leaching=P
outward.
Preferably, in described step S2, can the soft film of deformation be sealing film.
Preferably, above-mentioned steps S2 and S3 can repeatedly repeatedly, and hocket, until resin overflows outlet complete thorough impregnation.
Preferably, in described step S2, by adjusting injection pressure and outlet pressure simultaneously, resin filling is made to enter speed in fibre reinforced materials gap lower than resin filling velocity.
The invention has the advantages that:
(1) pressurizing resin capsule method of the present invention is a kind of fundamental technology, it adopts injection pressure that resin is directly injected goods die cavity from mould inlet, can under the pressure differential effect of the soft film both sides of deformation, what resin can strut current location in flow process can the soft film of deformation, makes to heave the resin cyst being formed and hold resin by the soft film of deformation; Resin cyst structure forms a resin guide passage, is convenient to resin and flows in the fibre reinforced materials space of corresponding position by resin cyst position; And then make resin fill type, dipping by fibre reinforced materials gap-fibre reinforced materials gap and resin cyst-fibre reinforced materials gap binary channels, dispersed each corner to goods die cavity of resin the most at last, realize filling type, dipping completely, fill type effective, speed is fast.
(2) in method of the present invention, owing to can move to hard mould side under the effect of pressure differential and carry out compacting by the soft film of deformation, make fibre reinforced materials finer and close, improve the fiber content of goods, the maximization of fiber content can be realized, be conducive to the control of quality and cost.
(3) in the present invention owing to adopting resin cyst to form a resin guide passage, without the need to additionally arranging water conservancy diversion device, reduce the manufacturing cost of goods, and environmental protection.
Accompanying drawing explanation
Fig. 1 is first embodiment of the invention product structure schematic diagram.
Fig. 2 is first embodiment of the invention original state schematic diagram.
Fig. 3 is that first embodiment of the invention pastes mould view.
Fig. 4 ~ 5 are each stage schematic diagram of first embodiment of the invention resin perfusion operation.
Fig. 6 is first embodiment of the invention pressure capsule dipping process schematic diagram.
Fig. 7 is second embodiment of the invention product structure schematic diagram.
Fig. 8 is second embodiment of the invention original state schematic diagram.
Fig. 9 is that second embodiment of the invention pastes mould view.
Figure 10 ~ 12 are each stage schematic diagram of second embodiment of the invention resin perfusion operation.
Figure 13 is second embodiment of the invention pressure capsule dipping process schematic diagram.
Detailed description of the invention
embodiment 1
In the present embodiment, as shown in Figure 1, goods 1 are semielliptical shape housing, length 1.5 meters, middle part Breadth Maximum 0.6 meter, depth capacity 0.6 meter, fibre reinforced composites products thickness 4mm, its fibre reinforced materials laying is from outward appearance to inner essence followed successively by gel coating resin 11+900 gram/m composite felt 4 layer 12; Resin system is unsaturated polyester resin and curing agent thereof.
Concrete technology step is:
mould preparatory process: mould comprises hard mould 21 and can the soft film 22 of deformation, by hard mould with can combine the goods die cavity forming goods by the soft film of deformation, known vacuum bag sealing film can be adopted by the soft film of deformation in the present embodiment.Resin injection mouth a is set at the minimum point place, bottom of mould, three outlet b are set mould is each apart from the height point place at inlet two ends farthest.
As shown in Figure 2, be placed in mould by fibre reinforced materials laying, wherein gel coating resin is close to hard mould inner surface, and composite felt is positioned at can the soft film side of deformation; Then mould is placed in pressurized tank 3, two outlets of mould are communicated in the air outside pressurized tank 3 by blast pipe.
As shown in Figure 3, the pressure of adjustment pressurized tank is 0.2MPa, and now mould can the ambient pressure P of the soft film side of deformation
outwardbe pressurized tank pressure 0.2MPa, can the soft film of deformation compacting glass fiber material laying under outside pressure effect realize pasting mould.
resin perfusion operation:as shown in Figure 4,
willresin is injected in mould by inlet, and injection pressure is initially set to 0.2MPa, and resin is constantly filled in the fibre reinforced materials gap near inlet; Injection pressure is risen to 0.3MPa, due to the injection pressure P of this process after starting injection by resin gradually
fillbe greater than P
outward, and control resin filling and enter speed in fibre reinforced materials gap lower than filling velocity, progressively can strut the inlet side resin cyst 4 heaved and form holding portion resin laterally by the soft film of deformation.
If when injection pressure cannot form resin cyst, by constantly adjusting injection pressure to realize, because when using mould, the sectional area of inlet is certain, therefore the change of injection pressure will inevitably change filling velocity, realizes being more prone to control for production process by the adjustment of injection pressure.
As shown in Figure 5, the flow-guiding channel that resin is formed by this resin cyst and fibre reinforced materials gap enter in die cavity fast, constantly enter more high-order fibre reinforced materials gap, outlet side to proceed to fill type and dipping, resin cyst constantly extends to outlet side; In this process, impregnation pressure P
leachingequal injection pressure P
fill.
pressure capsule dipping process:as shown in Figure 6, to be not less than after the resin of goods resin total amount (about when holding in mould
3/4fibre reinforced materials impregnating resin after), close resin injection mouth, under the effect of pressurized tank external pressure, fiber glass reinforcement is compacted, and makes resin and fiber glass reinforcement fill type and dipping completely further, and extrudes unnecessary resin by outlet.In this process, stain pressure P
leachingequal pressurized tank pressure P
outward, i.e. 0.2MPa.
Last at normal temperature or when heating, obtain fiber glass reinforcement composite article through cure and demold.
Following table is that the present embodiment adopts pressurizing resin capsule legal system of the present invention to do the contrast of fibre reinforced composites goods and other composite product techniques:
Conclusion: by the inventive method, environment is good, and production efficiency is high, and goods fiber content is high.
embodiment 2
In the present embodiment, goods profile is similar to example 1, and size is slightly large, and length reaches 2.2m, fibre reinforced composites products thickness 5mm, it is two-layer that laying is from outward appearance to inner essence followed successively by two-layer+900 grams/m of composite felt of two-layer+600 grams of bi-axial fabrics of gel coating resin+900 grams/m of composite felt; Resin system is unsaturated polyester resin and curing agent thereof.
Concrete technology step is:
mould preparatory process: mould comprises hard mould and can the soft film of deformation, by hard mould with can combine the goods die cavity forming goods by the soft film of deformation, known vacuum bag sealing film can be adopted by the soft film of deformation in the present embodiment.Resin injection mouth is set at the minimum point place, bottom of mould, three outlets are set mould is each apart from the height point place at inlet two ends farthest.
Be placed in mould by fibre reinforced materials laying, wherein gel coating resin is close to hard mould inner surface, and composite felt is positioned at can the soft film side of deformation; Then mould is placed in pressurized tank, two outlets of mould are communicated to by blast pipe in the air outside pressurized tank.
The pressure of adjustment pressurized tank is 0.2MPa, and now mould can the ambient pressure P of the soft film side of deformation
outwardbe pressurized tank pressure 0.2MPa, can the soft film of deformation compacting glass fiber material laying under outside pressure effect realize pasting mould.
resin perfusion operation: willresin is injected in mould by inlet, and injection pressure is initially set to 0.2MPa, and resin is constantly filled in the fibre reinforced materials gap near inlet; Injection pressure is risen to 0.35MPa, due to the injection pressure P of this process after starting injection by resin gradually
fillbe greater than P
outward, and resin filling enters speed in fibre reinforced materials gap lower than filling velocity, progressively can strut the inlet side resin cyst heaved and form holding portion resin laterally by the soft film of deformation.
The fibre reinforced materials gap of the flow-guiding channel that resin is formed by this resin cyst and inlet side enters in die cavity fast, and the fibre reinforced materials gap constantly entering outlet side proceeds to fill type and dipping, and resin cyst constantly extends to a high position; In this process, impregnation pressure P
leachingequal injection pressure P
fill.
pressure capsule dipping process:goods resin total amount is not less than when holding in mould
2/3after resin (about
1/2fibre reinforced materials impregnating resin after), close resin injection mouth, carry out pressure capsule under external pressure and flood, glass fibre floods extremely further
2/3left and right, now impregnation pressure P
leachingequal ambient pressure P
outward;
resin secondary pouring operation:again opened by resin injection mouth, resin injection pressure is also corresponding is adjusted to 0.35MPa, about
4/5fibre reinforced materials impregnating resin after, close inlet, in secondary pouring process, impregnation pressure P
leachingequal injection pressure P
fill,i.e. 0.35MPa.
secondary pressure capsule dipping process:pressurized tank pressure remains unchanged, and makes resin and fiber glass reinforcement fill type and dipping completely further, and extrudes unnecessary resin by outlet.In this process, impregnation pressure P
leachingequal pressurized tank pressure P
outward, i.e. 0.2MPa.
Last at normal temperature or when heating, obtain fiber glass reinforcement composite article through cure and demold.
Following table is that the present embodiment adopts pressurizing resin capsule legal system of the present invention to do the contrast of fibre reinforced composites goods and other composite product techniques:
Conclusion: adopt the inventive method, except environment is good, outside production efficiency height, goods are without hickie, and fiber content is high.
embodiment 3
In the present embodiment, goods profile, size are same as Example 2, fibre reinforced composites products thickness is about 6mm, and it is two-layer that laying is from outward appearance to inner essence followed successively by 900 grams/m of two-layer+900 grams/m of composite felt of two-layer+1200 grams/m of triaxial fabrics of composite felt; Resin system is low viscosity epoxy resin and curing agent thereof.
Concrete technology step is:
mould preparatory process: mould comprises hard mould and can the soft film of deformation, by hard mould with can combine the goods die cavity forming goods by the soft film of deformation, known vacuum bag sealing film can be adopted by the soft film of deformation in the present embodiment.Resin injection mouth is set at the minimum point place, bottom of mould, in both mold ends, two outlets is set higher than resin injection mouth place is each.
Be placed in mould by fibre reinforced materials laying, wherein gel coating resin is close to hard mould inner surface, and composite felt is positioned at can the soft film side of deformation; Then mould is placed in pressurized tank, two outlets of mould are communicated to by blast pipe in the air outside pressurized tank.
The pressure of adjustment pressurized tank is 0.2MPa, and now mould can the ambient pressure P of the soft film side of deformation
outwardbe pressurized tank pressure 0.2MPa, can the soft film of deformation compacting glass fiber material laying under outside pressure effect realize pasting mould.
resin perfusion operation: willresin is injected in mould by inlet, and injection pressure is initially set to 0.2MPa, and resin is constantly filled in the fibre reinforced materials gap near inlet; Injection pressure is risen to 0.3MPa, due to the injection pressure P of this process after starting injection by resin gradually
fillbe greater than P
outward, and resin filling enters speed in fibre reinforced materials gap lower than filling velocity, progressively can strut the inlet side resin cyst heaved and form holding portion resin laterally by the soft film of deformation.
The flow-guiding channel that resin is formed by this resin cyst and fibre reinforced materials gap enter in die cavity fast, and constantly enter more high-order fibre reinforced materials gap and proceed to fill type and dipping, resin cyst constantly extends to outlet side; In this process, impregnation pressure P
leachingequal injection pressure P
fill.
After accommodation in mould is not less than 3/5 resin of goods resin total amount (after the fibre reinforced materials impregnating resin of about 2/5), close resin injection mouth, the pressure of pressurized tank is adjusted to 0.3MPa, under external pressure, glass fibre floods further to 3/5, the pressure of pressurized tank is adjusted to 0.2MPa, resin injection mouth is opened again, resin injection pressure is also corresponding is adjusted to 0.4MPa, after the fibre reinforced materials impregnating resin of about 9/10, close inlet, pressurized tank pressure also rises to 0.35MPa thereupon, resin and fiber glass reinforcement is made to fill type and dipping completely further, and extrude unnecessary resin by outlet.In this process, impregnation pressure P
leachingequal pressurized tank pressure P
outward, i.e. 0.35MPa.
Last at normal temperature or when heating, obtain fiber glass reinforcement composite article through cure and demold.
Following table is that the present embodiment adopts pressurizing resin capsule legal system of the present invention to do the contrast of fibre reinforced composites goods and other composite product techniques:
Conclusion: adopt the inventive method, environment is good, and production efficiency is high, and goods fiber content is high.
embodiment 4
In the present embodiment, as shown in Figure 7, goods are rectangle case 1, length
1.0rice, width
0.6rice, height 0.2 meter, fibre reinforced composites products thickness 5mm, laying is from outward appearance to inner essence followed successively by gel coating resin 11+450 gram continuous felt+900 grams/m of composite felt 4 layer 12; Resin system is unsaturated polyester resin and curing agent thereof.
Concrete technology step is:
mould preparatory process: as shown in Figure 8, mould comprises hard mould 21 and can the soft film 22 of deformation, by hard mould with can combine the goods die cavity forming goods by the soft film of deformation, known vacuum bag sealing film can be adopted by the soft film of deformation in the present embodiment.Resin injection mouth is set at the minimum point place, bottom of mould, a bleeding point (i.e. outlet) is set mould is each apart from the height point place, both sides of inlet distalmost end.
Be placed in mould by fibre reinforced materials laying, wherein gel coating resin is close to hard mould inner surface, and composite felt is positioned at can the soft film side of deformation; Then and die edge sealing, open vavuum pump.
As shown in Figure 9, adjust and be evacuated to below 0.006MPa to die cavity, now mould can the ambient pressure P of the soft film side of deformation
outwardbe atmospheric pressure 0.1MPa, can the soft film of deformation compacting glass fiber material laying under outside pressure effect realize pasting mould.
resin perfusion operation: as shown in Figure 10, willresin is injected in mould by inlet, and injection pressure is initially set to 0.1MPa, and resin is constantly filled in the fibre reinforced materials gap near inlet; Injection pressure is risen to 0.2MPa after starting injection by resin gradually,
exhaust port pressure controls as 0.04MPa simultaneously,due to the injection pressure P of this process
fillbe greater than P
outward, make resin filling enter speed in fibre reinforced materials gap lower than filling velocity, and then progressively can strut the resin cyst heaved and form holding portion resin laterally by the soft film of deformation.
As shown in Figure 11,12, the fibre reinforced materials gap of the flow-guiding channel that resin is formed by this resin cyst and inlet side enters in die cavity fast, constantly enter more high-order fibre reinforced materials gap to proceed to fill type and dipping, resin cyst constantly extends to outlet side; In this process, impregnation pressure P
leachingequal injection pressure P
fill.
After accommodation in mould is not less than the resin of goods resin total amount (about
4/5fibre reinforced materials impregnating resin after), close resin injection mouth,
exhaust outlet is 0.005MPa by vacuumizing controlled pressure simultaneously,under atmospheric pressure effect, as shown in figure 13, fiber glass reinforcement is compacted, and makes resin and fiber glass reinforcement fill type and dipping completely further, and discharges unnecessary resin by vacuum orifice.In this process, impregnation pressure P
leachingequal atmospheric pressure P
outward, i.e. 0.1MPa.
Last at normal temperature or when heating, obtain fiber glass reinforcement composite article through cure and demold.
Following table is that the present embodiment adopts pressurizing resin capsule legal system of the present invention to do the contrast of fibre reinforced composites goods and other composite product techniques:
Conclusion: adopt the inventive method, compared with sticking with paste method with hand, environment is good, and production efficiency is high, and compared with lightweight RTM, goods fiber content is high.
embodiment 5
In the present embodiment, goods profile is similar to example 4, length
1.2rice, width
0.7rice, height 0.2 meter, products thickness 5mm, laying is from outward appearance to inner essence followed successively by 450 grams/m of continuous felt one decks+600 grams/m of bi-axial fabrics, six layers+450 grams/m continuous felt one decks; Resin system is low viscosity epoxy resin and curing agent thereof.
Concrete technology step is:
mould preparatory process: mould comprises hard mould and can the soft film of deformation, by hard mould with can combine the goods die cavity forming goods by the soft film of deformation, known vacuum bag sealing film can be adopted by the soft film of deformation in the present embodiment.Resin injection mouth is set at the minimum point place, bottom of mould, a bleeding point is set mould is each apart from the height point place, both sides of inlet distalmost end.
Fibre reinforced materials laying is placed in die hard, then can the soft film of deformation in die edge sealing, open vavuum pump.
Be evacuated to below 0.006MPa from bleeding point to die cavity, now mould can the ambient pressure P of the soft film side of deformation
outwardbe atmospheric pressure 0.1MPa, can the soft film of deformation compacting glass fiber material laying under outside pressure effect realize pasting mould.
resin perfusion operation: willresin is injected in mould by inlet, and injection pressure is initially set to 0.1MPa, and resin is constantly filled in the fibre reinforced materials gap near inlet; Injection pressure is risen to 0.2MPa, due to the injection pressure P of this process after starting injection by resin gradually
fillbe greater than P
outward, and resin filling enters speed in fibre reinforced materials gap lower than filling velocity, progressively can strut the inlet side resin cyst heaved and form holding portion resin laterally by the soft film of deformation.
The fibre reinforced materials gap of the flow-guiding channel that resin is formed by this resin cyst and inlet side enters in die cavity fast, and the fibre reinforced materials gap constantly entering outlet side proceeds to fill type and dipping, and resin cyst constantly extends to outlet side; In this process, impregnation pressure P
leachingequal injection pressure P
fill.
After accommodation in mould is not less than 3/5 resin of goods resin total amount (after the fibre reinforced materials impregnating resin of about 2/5), close resin injection mouth, resin cyst is pushed down under atmospheric pressure effect, resin is flooded further to 3/5 fiber glass reinforcement, open resin injection mouth, again adjust pressure and rise to 0.2MPa, extremely
4/5after fiber glass reinforcement impregnating resin, again close resin injection mouth, under atmospheric pressure effect, fiber glass reinforcement is compacted, make resin and fiber glass reinforcement fill type and dipping completely further, and discharge unnecessary resin by vacuum orifice.In this process, impregnation pressure P
leachingequal atmospheric pressure P
outward, i.e. 0.1MPa.
Last at normal temperature or when heating, obtain fiber glass reinforcement composite article through cure and demold.
Following table is that the present embodiment adopts pressurizing resin capsule legal system of the present invention to do the contrast of fibre reinforced composites goods and other composite product techniques:
Adopt the inventive method, environment is good, and without in water conservancy diversion auxiliary material situation, production efficiency is apparently higher than vacuum diversion, and goods fiber content is high.
Claims (4)
1. adopt pressurizing resin capsule legal system to make a method for fibre reinforced composites goods, it is characterized in that described step is:
step S1mould preparatory process: mould comprises hard mould and can the soft film of deformation, by hard mould with can combine the goods die cavity forming goods by the soft film of deformation, mould has at least one inlet being positioned at low level and at least one outlet higher than inlet; Fibre reinforced materials is placed in the goods die cavity of mould, and can the soft mould of deformation will make fibre reinforced materials be pressed in hard mould to hard mould by external force;
step S2resin perfusion operation: by resin with injection pressure from mould inlet note into, in this process, the fibre reinforced materials gap near inlet side constantly filled by resin, start to fill type and dipping, progressively can strut the inlet side resin cyst heaved and form holding portion resin laterally by the soft film of deformation simultaneously;
Resin by injection is continued after forming inlet side resin cyst, the fibre reinforced materials gap that resin enters outlet side by the flow-guiding channel of inlet side resin cyst formation and the fibre reinforced materials gap of inlet side simultaneously proceeds to fill type and dipping, and resin cyst constantly extends to outlet side;
Wherein, injection pressure is P
fill, mould can deformation soft film side ambient pressure be P
outward, mould outlet pressure is P
row, in this step, resin is fully filled, the impregnation pressure be impregnated in each gap of fibre reinforced materials is P
leaching, and P
leaching=P
fill>=P
outward>=P
row,
step S3pressure capsule dipping process: close inlet and stop resin by injection, in extraneous pressure P
outwardeffect bed die can the soft mould of deformation to fibre reinforced materials, realize pressure capsule dipping, in this step, resin is fully filled, the impregnation pressure be impregnated in each gap of fibre reinforced materials is P
leaching, P
leaching=P
outward.
2. fibre reinforced composites article fabrication methods according to claim 1, is characterized in that: in described step S2, can the soft film of deformation be sealing film.
3. employing pressurizing resin capsule legal system according to claim 1 makes the method for fibre reinforced composites goods, it is characterized in that: above-mentioned steps S2 and S3 can repeatedly repeatedly, and hocket, until resin overflows outlet complete thorough impregnation.
4. the employing pressurizing resin capsule legal system according to claim 1 or 3 makes the method for fibre reinforced composites goods, it is characterized in that: in described step S2, by adjusting injection pressure and outlet pressure simultaneously, resin filling is made to enter speed in fibre reinforced materials gap lower than resin filling velocity.
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| CN107877888A (en) * | 2017-10-31 | 2018-04-06 | 全球能源互联网研究院有限公司 | A kind of insulated tension pole prefabricated component preparation technology |
| CN110001086A (en) * | 2019-01-28 | 2019-07-12 | 广东国立科技股份有限公司 | A kind of molding vacuum introducing technology prepares the encapsulating method of carbon fibre composite |
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| CN105034408B (en) | 2017-06-13 |
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