CN205112423U - Automobile -used carbon -fibre composite shape for hat roof beam preparation mould - Google Patents
Automobile -used carbon -fibre composite shape for hat roof beam preparation mould Download PDFInfo
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- CN205112423U CN205112423U CN201520885751.6U CN201520885751U CN205112423U CN 205112423 U CN205112423 U CN 205112423U CN 201520885751 U CN201520885751 U CN 201520885751U CN 205112423 U CN205112423 U CN 205112423U
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Abstract
The utility model discloses an automobile -used carbon -fibre composite shape for hat roof beam preparation mould, for the preparation of overcoming the shape for hat roof beam be difficult to to the intensity at different positions adjust, the unable reasonable intensity distribution's of acquisition problem, automobile -used carbon -fibre composite shape for hat roof beam preparation mould include die (1), down die (2) and air bag (3), place in the low groove of under die (2) air bag (3), go up die (1) columniform location unthreaded hole suit through its four corners department on the columniform location light beam of die (2) four corners department down and on the messenger die (1) close and cover under on die (2), go up the upper groove of die (1) and adjust and form a complete die cavity mutually well with the low groove of lower die (2), go up the last semi -circular through -hole of die (1) and adjust and form a complete cylindrical through hole mutually well with the lower semi -circular through -hole of lower die (2), the forcing pipe that admits air of air bag (3) left end stretches out and the connection of pump output from complete cylindrical through hole.
Description
Technical field
The utility model relates to a kind of preparation facilities of automobile-used part, and more particularly, the utility model relates to automobile-used carbon fibre composite shape for hat beam and prepares mould.
Background technology
Carbon fibre composite relies on its outstanding mechanical property to obtain in a lot of industry as a kind of advanced composite material (ACM) to apply more and more widely.In recent years, along with the development of automotive light weight technology technology, the use of composite is used widely in automobile manufacturing process.Wherein carbon-fiber composite material has high specific strength, specific stiffness relative to traditional metal materials and other composite, than energy-absorbing, is widely used in automobile industry.
Shape for hat beam is the design form generally adopted in the main carrier bar of vehicle body, its have stability and crashworthiness good, hat beam contact area is large, can not form wedge angle, can better protect driver safety at breaking part.Adopt carbon fibre composite to replace traditional metal materials to make shape for hat beam required in body structure and under the prerequisite not reducing its mechanical property, the lightweight of vehicle body can be realized.In actual application, while requiring part high strength, require that it is overall or locally have enough plasticity or toughness, with the requirement of the aspects such as satisfied collision, connection toward contact.In molding carbon fiber composite material process, its local strength is difficult to control, but actual engineering design requires that the intensity adjustable often needing to realize beam controls.Although change by the laying quantity of fiber cloth the mechanical property that thickness can change carbon fibre composite, but variable cross-section place can produce stress concentration phenomenon, cause the intensity extreme difference of this local, change in the preparation process of carbon fibre composite thickness of slab can significantly raise the cost then improve performance and also in practical operation be difficult to realize.By change problem of solidification, it not easily reaches the effect of local solidification.
Consult Fig. 1, carbon fibre composite mould pressing process flow process as shown in FIG..And the Railway Project that the existence of automobile-used shape for hat beam is prepared in existing technological process is:
(1) at the automobile-used shape for hat beam conventional method side of preparation not easily pressurized, cause the mechanical property of side poor.
(2) easily there is discontinuity in the automobile-used shape for hat beam conventional method of preparation, cause the position mechanical property that test specimen arc transition occurs larger.
(3) strength control of automobile-used carbon fibre composite shape for hat beam can realize by controlling thickness of slab, but increasing thickness of slab not only significantly improves the manufacturing cost of plate but also occur that in variable cross-section position stress is concentrated.
(4) the zonule intensity adjustable of automobile-used carbon fibre composite shape for hat beam is difficult to realize by compression molding technology at present.
Therefore, need in existing carbon fibre composite die press technology for forming flow process, need to design new mould, increase new process, ensure can prepare high performance automobile-used carbon fibre composite shape for hat beam by compression molding, controlling the intensity of carbon fibre composite shape for hat beam simultaneously by setting up new process, automobile-used carbon fiber composite shape for hat beam can be prepared.
Summary of the invention
Technical problem to be solved in the utility model overcomes prior art to there is in the molded process of carbon fibre composite shape for hat beam form the problem being difficult to effectively regulate, cannot obtain reasonable strength distribution to the intensity of different parts, provides automobile-used carbon fibre composite shape for hat beam and prepare mould and method.
For solving the problems of the technologies described above, the utility model adopts following technical scheme to realize: described automobile-used carbon fibre composite shape for hat beam is prepared mould and comprised upper cavity die, lower cavity die and air bag;
Air bag is placed in the low groove of lower cavity die, upper cavity die is sleeved on the columniform location light beam at lower cavity die corner place by the columniform location unthreaded hole at its corner place and makes upper cavity die closing lid on lower cavity die, the upper groove of upper cavity die and the low groove of lower cavity die align mutually and form a complete die cavity, first manhole of upper cavity die and the lower semi-circular through hole of lower cavity die align mutually and form a complete cylindrical hole, and the air inlet forcing pipe of air bag left end stretches out from complete cylindrical hole and is connected with inflator pump output.
Upper cavity die described in technical scheme is cuboid formula structural member, a cuboid formula upper groove is inwardly set in the center of a side of cuboid, the internal face of four cell walls of upper groove is equal with the distance of the four corresponding end faces of upper cavity die successively, the bottom surface of upper groove adopts face of cylinder rounding off to be connected with the internal face of front and back two cell wall successively, upper cavity die outside upper groove corner is provided with four columniform location unthreaded holes, the distance of four columniform location unthreaded holes successively apart from the both ends of the surface of upper cavity die four right angle is equal, in the centre position on the top of the left cell wall of upper groove, first manhole is set, first circular port is communicated with upper groove.
Lower cavity die described in technical scheme is cuboid formula structural member, a cuboid formula low groove is set downwards in the center of a side of cuboid, the internal face of four cell walls of low groove is equal with the distance of the four corresponding end faces of lower cavity die successively, the bottom surface of low groove adopts face of cylinder rounding off to be connected with the internal face of front and back two cell wall successively, lower cavity die outside low groove corner is provided with four columniform location light beams, the distance of four columniform location light beams successively apart from the both ends of the surface of lower cavity die four right angle is equal, four columniform location unthreaded holes on four columniform location light beams and upper cavity die align, in the centre position on the top of the left cell wall of low groove, a lower semi-circular through hole is set, lower semi-circular hole is communicated with low groove.
Lower cavity die described in technical scheme is equal with the appearance and size of upper cavity die, and lower cavity die is equal with upper groove physical dimension with the low groove on upper cavity die; Lower cavity die is equal with first manhole physical dimension with the lower semi-circular through hole on upper cavity die, and longitudinal plane of symmetry of the axis of rotation of lower semi-circular through hole and first manhole and low groove and upper groove is coplanar.
Air bag described in technical scheme is the hollow shell part of the identical cuboid of inner chamber formed together with shape, size and a upper cavity die attach together with lower cavity die, face of cylinder rounding off is adopted to be connected between air bag upper wall, antetheca, lower wall with two walls adjacent in rear wall, air bag adopts polytetrafluoroethylene (PTFE) material, and the thickness of air bag is 2 ~ 5mm.
Compared with prior art the beneficial effects of the utility model are:
1. automobile-used carbon fibre composite shape for hat beam described in the utility model is prepared the mould pressing process adopted in mould and method and is solved traditional mould pressing process and be used for preparing the difficulty that carbon fibre composite shape for hat beam exists, by mould cavity pressure to carbon fibre composite shape for hat beam test specimen pressure, reach pressure required in test material preparation process.
2. the Design of Dies that automobile-used carbon fibre composite shape for hat beam described in the utility model is prepared in mould makes a big difference with traditional moulds design, and its upper and lower mould is all die, and inner chamber is shape for hat beam shape, and this mould can prepare the shape for hat beam of any thickness.In mold process, only have marginal position pressurized, be not subject to any pressure when non-filler in mold cavity, test specimen pressure is actual is jointly provide by outside chamber He in chamber, test specimen upper and lower surface can be made like this to be subject to identical force value, there is not pressure differential.
3. automobile-used carbon fibre composite shape for hat beam described in the utility model prepares the polytetrafluoroethylmaterial material bag selected in mould is a kind of desirable material realizing the utility model process, it is high temperature resistant, can not produce self-deformation and material dissolves at curing temperatures, with resin curing process not there is any reaction in this material of polytetrafluoroethylene (PTFE), its smooth surface, takes out very convenient from mould.
4. the control method that automobile-used carbon fibre composite shape for hat beam described in the utility model prepares shape for hat beam strength in mould and method is adopt the fracture toughness controlling carbon fibre composite interface, and specific implementation method is add delamination promoter and delamination inhibitor at interlayer.The method possesses simple to operate, level and smooth at stress area, by the change carbon fibre composite intensity of many gradients, can control the intensity of carbon fibre composite beam tiny area simultaneously.
The fracture toughness at carbon fibre composite interface is changed by two kinds of methods usually: a kind of method is the proper property of the constituent element relying on carbon fibre composite; Another kind is the suitable control depending on fiber-matrix interface.Matrix in carbon fibre composite and matrix choose all, adopt suitable material and interlaminar separation terminator and promoter can increase or reduce the fracture toughness of carbon fibre composite by second method, thus change its mechanical property.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described:
Fig. 1 is the FB(flow block) of carbon fibre composite conventional moulded moulding process;
Fig. 2 is the full sectional view that automobile-used carbon fibre composite shape for hat beam described in the utility model prepares on mould structure composition front view;
Fig. 3 is the axonometric projection view that automobile-used carbon fibre composite shape for hat beam described in the utility model prepares the upper cavity die structure composition in mould;
Fig. 4 is the axonometric projection view that automobile-used carbon fibre composite shape for hat beam described in the utility model prepares the lower cavity die structure composition in mould;
Fig. 5 is the axonometric projection view that automobile-used carbon fibre composite shape for hat beam described in the utility model prepares the air bag after the inflation of the polytetrafluoroethylene (PTFE) material in mould;
Fig. 6 is the full sectional view on the air bag front view after automobile-used carbon fibre composite shape for hat beam described in the utility model prepares the inflation of the polytetrafluoroethylene (PTFE) material in mould;
Fig. 7 is the axonometric projection view of automobile-used carbon fibre composite list shape for hat beam described in the utility model;
Fig. 8 is the axonometric projection view of the two shape for hat beam of automobile-used carbon fibre composite described in the utility model;
Fig. 9 is the FB(flow block) of the two shape for hat beam preparation method of automobile-used carbon fibre composite intensity adjustable described in the utility model;
In figure: 1. upper cavity die, 2. lower cavity die, 3. air bag.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is explained in detail:
Automobile-used carbon fibre composite shape for hat beam preparation method described in the utility model comprises automobile-used carbon fibre composite equal strength shape for hat beam preparation method and automobile-used carbon fibre composite intensity adjustable shape for hat beam preparation method.
One. the mould used in automobile-used carbon fibre composite shape for hat beam preparation method
Described mould comprises upper cavity die 1, lower cavity die 2 and air bag 3.This mould structure is simple, is applicable to preparation equal strength shape for hat beam and intensity adjustable shape for hat beam.
Air bag 3 is placed in the low groove of lower cavity die 2, upper cavity die 1 is sleeved on the columniform location light beam at lower cavity die 2 four jiaos of places by the columniform location unthreaded hole at its corner place and makes upper cavity die 1 closing lid on lower cavity die 2, the upper groove of upper cavity die 1 and the low groove of lower cavity die 2 align mutually and form a complete die cavity, first manhole of upper cavity die 1 and the lower semi-circular through hole of lower cavity die 2 align mutually and form a complete cylindrical hole, and the air inlet forcing pipe of air bag 3 left end to stretch out and inflator pump output connects from complete cylindrical hole.
1. upper cavity die 1
Consult Fig. 2 and Fig. 3, described upper cavity die 1 is cuboid formula structural member, side (end) face of cuboid center inwardly (on) a cuboid formula upper groove is set, the internal face of four cell walls of upper groove is equal with the distance of the four corresponding end faces of upper cavity die 1 successively, the bottom surface of upper groove adopts face of cylinder rounding off to be connected with the internal face of front and back two cell wall successively, upper cavity die 1 outside upper groove corner is provided with four columniform location unthreaded holes, the distance of four columniform location unthreaded holes successively apart from the both ends of the surface (two right-angle sides) of upper cavity die 1 four right angle is equal, in the centre position on the top of the left cell wall of upper groove, first manhole is set, first circular port is communicated with upper groove.
In embodiment, upper cavity die 1 is aluminum alloy material, and long is 400mm, and wide is 200mm, and height is 80mm; The length of upper groove is 300mm, wide is 100mm, dark is the groove of 50mm, and the bottom surface of upper groove adopts radius to be that the face of cylinder rounding off of 20mm is connected successively with the internal face of front and back two cell wall, and the internal face of four cell walls of upper groove is 50mm with the distance of the four corresponding end faces of upper cavity die 1 successively.The axis of rotation of four columniform location unthreaded holes outside upper groove corner is 25mm apart from the distance of the both ends of the surface (two right-angle sides) of die 1 four right angle, and the radius of four columniform location unthreaded holes is 15mm, is 30mm deeply.The radius of first manhole arranged in the centre position on the left cell wall top of groove is 15mm, and long is 50mm.
2. lower cavity die 2
Consult Fig. 2 and Fig. 4, described lower cavity die 2 is cuboid formula structural member, a cuboid formula low groove is set downwards in the center in side (top) face of cuboid, the internal face of four cell walls of low groove is equal with the distance of the four corresponding end faces of lower cavity die 2 successively, the bottom surface of low groove adopts face of cylinder rounding off to be connected with the internal face of front and back two cell wall successively, lower cavity die 2 outside low groove corner is provided with four columniform location light beams, the distance of four columniform location light beams successively apart from the both ends of the surface (two right-angle sides) of lower cavity die 2 four right angle is equal, four columniform location unthreaded holes on four columniform location light beams and upper cavity die 1 align, when namely four columniform location unthreaded hole matched togethers on the columniform location light beam of four on lower cavity die 2 and upper cavity die 1 become a complete mould, arrange a lower semi-circular through hole in the centre position on the top of the left cell wall of low groove, lower semi-circular hole is communicated with low groove.Lower cavity die 2 is equal with upper cavity die 1 appearance and size, and low groove is equal with upper groove physical dimension; Lower semi-circular through hole is equal with first manhole physical dimension, lower semi-circular through hole and first manhole are combined into a complete cylindrical hole, and longitudinal plane of symmetry of the axis of rotation of lower semi-circular through hole and first manhole and low groove and upper groove is coplanar.
In embodiment, lower cavity die 2 is aluminum alloy material, and long is 400mm, and wide is 200mm, and height is 80mm; The length of low groove is 300mm, wide is 100mm, dark is 50mm, and the bottom surface of low groove adopts radius to be that the face of cylinder rounding off of 20mm is connected successively with the internal face of front and back two cell wall, and the internal face of four cell walls of low groove is 50mm with the distance of the four corresponding end faces of lower cavity die 2 successively.The axis of rotation of four columniform location light beams outside low groove corner is 25mm apart from the distance of the both ends of the surface (two right-angle sides) of die 2 four right angle, and the radius of four columniform location light beams is 15mm, is 30mm deeply.The radius of the lower semi-circular through hole arranged in the centre position on the left cell wall top of low groove is 15mm, and long is 50mm.
3. air bag 3
Consult Fig. 5 and Fig. 6, air bag 3 is just in time fitted together formed inner chamber fills up 2-in-1 to upper cavity die 1 and lower cavity die after inflating, exactly, the shape of air bag 3 is shape, size and a upper cavity die 1 and the 2-in-1 hollow shell part being fitted together the identical cuboid of formed inner chamber of lower cavity die, adopts face of cylinder rounding off to be connected between air bag 3 upper wall, antetheca, lower wall with two walls adjacent in rear wall.Air bag 3 adopts polytetrafluoroethylene (PTFE) material, and the thickness of air bag 3 is 2 ~ 5mm.
Polytetrafluoroethylene (PTFE) has the feature of antiacid alkali resistant, anti-various organic solvent, is dissolved in all solvents hardly.Meanwhile, polytetrafluoroethylene (PTFE) has resistant to elevated temperatures feature, and its coefficient of friction is extremely low, not with resin generation chemical reaction.Air bag 3 is long is 300mm, and wide is 100mm, and height is 100mm, adopts the transition of radius 20mm arc surface to connect.There is overall diameter 20mm at the center of air bag 3 left side, and interior diameter is 16mm, the cylindrical air inlet forcing pipe of long 100mm.
Two. the preparation method of automobile-used carbon fibre composite equal strength shape for hat beam
The basis of designed mould completes the preparation of automobile-used carbon fibre composite equal strength shape for hat beam, and designed mould can prepare two kinds of automobile-used equal strength shape for hat beams, and namely equal strength list shape for hat beam and the two shape for hat beam of equal strength can adopt this mould to be prepared.
The preparation method of automobile-used carbon fibre composite equal strength list shape for hat beam:
1. the carbon fibre composite prepreg cloth cut is laid in the low groove of lower cavity die 2 by the number of plies designed, the inner surface of the low groove of carbon fibre composite prepreg cloth lower surface and lower cavity die 2 and upper surface (i.e. the upper surface of the internal face of bottom surface, front cell wall, the internal face of rear cell wall, the upper surface of front cell wall and rear cell wall) are fitted tightly;
2. the air bag 3 of shrivelled polytetrafluoroethylene (PTFE) material put into the low groove of lower cavity die 2 and fit with the carbon fibre composite prepreg cloth that step 1 is put into, the air inlet forcing pipe of air bag 3 left end is connected with wind Rimula T800 inflator pump, and this inflator pump carries the Pressure gauge of the chamber pressure of the air bag 3 controlling polytetrafluoroethylene (PTFE) material;
3. upper cavity die 1 is attached together on lower cavity die 2, observe inflator pump force value, the force value of air bag 3 inner chamber of polytetrafluoroethylene (PTFE) material is made to remain on 5MPa, upper cavity die 1 and lower cavity die 2 heat up gel (heat up pressurization be all completed by compression molding press) simultaneously, namely control heating rate at 25 DEG C of-30 DEG C/h.Temperature is risen to 100 DEG C-110 DEG C, epoxy novolac vinylite gel time is 15min-20min.
4. after epoxy novolac vinylite gel terminates, upper cavity die 1 and lower cavity die 2 pressurize simultaneously, keep inflator pump to continue to inflate to air bag 3 inner chamber of polytetrafluoroethylene (PTFE) material simultaneously, pressure is kept to change in 0.5MPa ~ 1MPa interval, elevated cure, remains that cavity pressure value is constant in the curing process simultaneously; Namely control heating rate at 25 DEG C of-30 DEG C/h, continue to be warming up to 120 DEG C-130 DEG C, make epoxy novolac vinylite solidify 2h.
5. control heating rate at 25 DEG C of-30 DEG C/h, continue to be warming up to 145 DEG C-150 DEG C, Excess resin was lost efficacy.
6. remove inflator pump, after cooling, take off upper cavity die 1, taken out after the air bag 3 of polytetrafluoroethylene (PTFE) material is shrivelled, take out test specimen, the burr in edge during removing specimen molding.
The preparation method of the two shape for hat beam of automobile-used carbon fibre composite equal strength:
1. the carbon fibre composite prepreg cloth cut is laid in the low groove of lower cavity die 2 by the number of plies designed, the inner surface of the low groove of carbon fibre composite prepreg cloth lower surface and lower cavity die 2 and upper surface (i.e. the upper surface of the internal face of bottom surface, front cell wall, the internal face of rear cell wall, the upper surface of front cell wall and rear cell wall) are fitted tightly;
2. the air bag 3 of shrivelled polytetrafluoroethylene (PTFE) material put into the low groove of lower cavity die 2 and fit with the carbon fibre composite prepreg cloth placed, the air inlet forcing pipe of air bag 3 left end is connected with wind Rimula T800 inflator pump, this inflator pump carries the Pressure gauge of the chamber pressure of the air bag 3 controlling polytetrafluoroethylene (PTFE) material, and the air bag 3 of polytetrafluoroethylene (PTFE) material is full of by turn on pump air inlet.The carbon fibre composite prepreg cloth that the upper surface of upper surface and lower cavity die 2 that another block carbon fibre composite prepreg cloth is laid in the air bag 3 of polytetrafluoroethylene (PTFE) material has been placed fits tightly.
3. upper cavity die 1 is attached together on lower cavity die 2, observe inflator pump force value, make the force value of air bag 3 inner chamber of polytetrafluoroethylene (PTFE) material remain on 5MPa, upper cavity die 1 and lower cavity die 2 heat up gel (heating up pressurizes is all completed by compression molding press) simultaneously.Namely heating rate is controlled at 25 DEG C of-30 DEG C/h.Temperature is risen to 100 DEG C-110 DEG C, epoxy novolac vinylite gel time is 15min-20min.
4. after epoxy novolac vinylite gel terminates, upper cavity die 1 and lower cavity die 2 pressurize simultaneously, keep inflator pump to continue to inflate to air bag 3 inner chamber of polytetrafluoroethylene (PTFE) material simultaneously, pressure is kept to change in 0.5MPa ~ 1MPa interval, elevated cure, remains that cavity pressure value is constant in the curing process simultaneously; Namely control heating rate at 25 DEG C of-30 DEG C/h, continue to be warming up to 120 DEG C-130 DEG C, make epoxy novolac vinylite solidify 2h.
5. control heating rate at 25 DEG C of-30 DEG C/h, continue to be warming up to 145 DEG C-150 DEG C, Excess resin was lost efficacy.
6. remove inflator pump, after cooling, take off upper cavity die 1, taken out after the air bag 3 of polytetrafluoroethylene (PTFE) material is shrivelled, take out test specimen, the burr in edge during removing specimen molding.
Three. automobile-used carbon fibre composite intensity adjustable shape for hat beam preparation method described in the utility model
Intensity adjustable shape for hat beam preparation method described in the utility model is that the combination degree by increasing or reduce carbon fiber and resin realizes.Several most typical carbon fibre composite failure mode: MATRIX CRACKING, interfacial detachment, fibrous fracture, delamination failure, the final failure mode of carbon fibre composite is the comprehensive function of these four kinds of failure modes.So the interface cohesion of control treatment fiber and resin the mechanical property of carbon fibre composite just can be controlled.In carbon fibre composite hierarchically laid course, add some materials at interlayer can significantly improve or reduce its intensity.This method not only handled easily, and the rigidity controlling each local can be reached, which layer the layering that even can control carbon fiber laminated composite occurs in.Concrete preparation method is as follows:
1. the carbon fibre composite prepreg cloth cut is laid in the low groove of lower cavity die 2 by the number of plies designed, the inner surface of the low groove of carbon fibre composite prepreg cloth lower surface and lower cavity die 2 and lower cavity die 2 upper surface (i.e. the upper surface of the internal face of bottom surface, front cell wall, the internal face of rear cell wall, the upper surface of front cell wall and rear cell wall) are fitted tightly; By the bottom intensity adjustable shape for hat beam of preparation by the right side to parting on the left side as n intensity interval, n is more than or equal to the natural number that 2 are less than or equal to 10, each intensity interval carbon fibre composite prepreg cloth add different adding materials between layers.
In order to strengthen the intensity of carbon fibre composite, when adding the Nano particles of silicon dioxide of 0.2mg-0.5mg in carbon fibre composite prepreg cloth process of deployment between the two layers.In order to reduce the intensity of carbon fibre composite, when adding the cotton felt of 0.2mg-0.5mg in carbon fibre composite prepreg cloth process of deployment between the two layers or adding one deck poly tetrafluoroethylene between layers at carbon fibre composite prepreg cloth, the former intensity the latter of reduction carbon fibre composite among a small circle can significantly can reduce the intensity of carbon fibre composite.Scope according to control intensity selects different adding materials between two-layer carbon fibre composite prepreg cloth.
2. the air bag 3 of shrivelled polytetrafluoroethylene (PTFE) material to be placed in the low groove of lower cavity die 2 and to fit with the carbon fibre composite prepreg cloth that step 1 is put into, the air bag 3 of polytetrafluoroethylene (PTFE) material is inflated completely, the carbon fibre composite prepreg cloth that the upper surface of upper surface and lower cavity die 2 that another block carbon fibre composite prepreg cloth is laid in the air bag 3 of polytetrafluoroethylene (PTFE) material has been placed fits tightly.By the upper end intensity adjustable shape for hat beam of preparation by the right side to parting on the left side as n intensity interval, n is more than or equal to the natural number that 2 are less than or equal to 10, each intensity interval carbon fibre composite prepreg cloth add different adding materials between layers.
In order to reduce the intensity of carbon fibre composite, when adding the cotton felt of 0.2mg-0.5mg in carbon fibre composite prepreg cloth process of deployment between the two layers or adding one deck poly tetrafluoroethylene between layers at carbon fibre composite prepreg cloth, the former can the intensity of reduction carbon fibre composite among a small circle, and the latter significantly can reduce the intensity of carbon fibre composite.Scope according to control intensity selects different adding materials between two-layer carbon fibre composite prepreg cloth.(preparing single this step of shape for hat beam to omit)
3. upper cavity die 1 is attached together on lower cavity die 2, observe inflator pump force value, make the force value of air bag 3 inner chamber of polytetrafluoroethylene (PTFE) material remain on 5MPa, upper cavity die 1 and lower cavity die 2 gel (heating up pressurizes is all by compression molding press) that simultaneously heats up completes.Namely heating rate is controlled at 25 DEG C of-30 DEG C/h.Temperature is risen to 100 DEG C-110 DEG C, the phenol aldehyde modified epoxy resin gel time is 15min-20min.
4. after epoxy novolac vinylite gel terminates, upper cavity die 1 and lower cavity die 2 pressurize simultaneously, keep inflator pump to continue to inflate to air bag 3 inner chamber of polytetrafluoroethylene (PTFE) material simultaneously, pressure is kept to change in 0.5MPa ~ 1MPa interval, elevated cure, remains that cavity pressure value is constant in the curing process simultaneously; Namely control heating rate at 25 DEG C of-30 DEG C/h, continue to be warming up to 120 DEG C-130 DEG C, make phenol aldehyde modified epoxy resin cure 2h.
5. control heating rate at 25 DEG C of-30 DEG C/h, continue to be warming up to 145 DEG C-150 DEG C, Excess resin was lost efficacy.
6. remove inflator pump, after cooling, take off upper cavity die 1, taken out after the air bag 3 of polytetrafluoroethylene (PTFE) material is shrivelled, take out test specimen, the burr in edge during removing specimen molding.
Embodiment
Apply the two shape for hat beam of automobile-used carbon fibre composite intensity adjustable that automobile-used carbon fibre composite shape for hat beam preparation method described in the utility model prepares 400mm × 400mm × 2mm, require that this beam has different intensity gradients, in actual Automobile Design, the energy absorption characteristics of the two shape for hat beam of intensity adjustable is better, and requirement of strength strengthens from left to right successively.Select 3k carbon fiber to be carbon fibre composite main body, resin matrix selects epoxy novolac modified resin.Interlayer additive adopts Nano particles of silicon dioxide, cotton felt and poly tetrafluoroethylene.
1. the carbon fiber 2D woven fabric good with the preimpregnation of epoxy novolac vinylite being cut into 12 block lengths is 300mm, and wide is the rectangle of 190mm.Be four intensity interval by the right side to parting on the left side by two for the intensity adjustable of preparation shape for hat beam, selections length is equal length, and namely each intensity interval is long is 75mm.The Nano particles of silicon dioxide dissolution homogeneity that first intensity area selects 0.2-0.5mg Nano particles of silicon dioxide to be dissolved in the configuration of 1mL distilled water is coated with between the two layers, second intensity area does not deal with, 3rd intensity interval by the cotton felt uniform spreading of 0.2mg between the layers, 4th intensity area, at 2 layers and 3 layers, 3 layers and 4 layers, sticks one deck poly tetrafluoroethylene between 4 layers and 5 layers.6 pieces of carbon fibre initial rinse fabric laies that taking-up cuts, on lower cavity die 1, add different materials respectively by above-mentioned intensity interval between process of deployment carbon fibre initial rinse fabric.
2. in the die cavity of lower cavity die 1, put into the air bag 3 of shrivelled polytetrafluoroethylene (PTFE) material, the air bag 3 of polytetrafluoroethylene (PTFE) material is inflated completely, other carbon fibre initial rinse fabric is laid in air bag 3 upper surface of tetrafluoroethene material, the Nano particles of silicon dioxide dissolution homogeneity that first intensity area selects 0.2-0.5mg Nano particles of silicon dioxide to be dissolved in the configuration of 1mL distilled water is coated with between the two layers, second intensity area does not deal with, 3rd intensity interval by the cotton felt uniform spreading of 0.2mg between the two layers, 4th intensity area is at 2 layers and 3 layers, 3 layers and 4 layers, one deck poly tetrafluoroethylene is sticked between 4 layers and 5 layers.Each intensity interval is long is 75mm.
3. matched moulds heats up, and observes inflator pump force value, makes the force value of air bag 3 inner chamber of polytetrafluoroethylene (PTFE) material remain on 5MPa, and upper cavity die 1 and lower cavity die 2 heat up simultaneously, controls heating rate at 30 DEG C/h.Temperature is risen to 100 DEG C, the gel time of phenol aldehyde modified epoxy resin is 20min.
4. after phenol aldehyde modified epoxy resin gel terminates, upper cavity die 1 and lower cavity die 2 pressurize simultaneously, keep inflator pump to continue, to the inflation of polytetrafluoroethylene (PTFE) bag inner chamber, to keep pressure at 10MPa simultaneously.Control heating rate at 30 DEG C/h, continue to be warming up to 130 DEG C, make epoxy novolac vinylite solidify 2h.
5. control heating rate at 30 DEG C/h, continue to be warming up to 150 DEG C, Excess resin was lost efficacy.
6. remove inflator pump, after cooling, take off upper cavity die 1, taken out after polytetrafluoroethylene (PTFE) bag is shrivelled, the burr in edge during removing specimen molding.
Claims (5)
1. automobile-used carbon fibre composite shape for hat beam prepares a mould, it is characterized in that, described automobile-used carbon fibre composite shape for hat beam is prepared mould and comprised upper cavity die (1), lower cavity die (2) and air bag (3);
Air bag (3) is placed in the low groove of lower cavity die (2), upper cavity die (1) is sleeved on the columniform location light beam at lower cavity die (2) corner place by the columniform location unthreaded hole at its corner place and makes upper cavity die (1) closing lid on lower cavity die (2), upper groove and the low groove of lower cavity die (2) of upper cavity die (1) align mutually and form a complete die cavity, first manhole and the lower semi-circular through hole of lower cavity die (2) of upper cavity die (1) align mutually and form a complete cylindrical hole, the air inlet forcing pipe of air bag (3) left end stretches out and the connection of inflator pump output from complete cylindrical hole.
2. prepare mould according to automobile-used carbon fibre composite shape for hat beam according to claim 1, it is characterized in that, described upper cavity die (1) is cuboid formula structural member, a cuboid formula upper groove is inwardly set in the center of a side of cuboid, the internal face of four cell walls of upper groove is equal with the distance of the four corresponding end faces of upper cavity die (1) successively, the bottom surface of upper groove adopts face of cylinder rounding off to be connected with the internal face of front and back two cell wall successively, upper cavity die (1) outside upper groove corner is provided with four columniform location unthreaded holes, the distance of four columniform location unthreaded holes successively apart from the both ends of the surface of upper cavity die (1) four right angle is equal, in the centre position on the top of the left cell wall of upper groove, first manhole is set, first circular port is communicated with upper groove.
3. prepare mould according to automobile-used carbon fibre composite shape for hat beam according to claim 1, it is characterized in that, described lower cavity die (2) is cuboid formula structural member, a cuboid formula low groove is set downwards in the center of a side of cuboid, the internal face of four cell walls of low groove is equal with the distance of the four corresponding end faces of lower cavity die (2) successively, the bottom surface of low groove adopts face of cylinder rounding off to be connected with the internal face of front and back two cell wall successively, lower cavity die (2) outside low groove corner is provided with four columniform location light beams, the distance of four columniform location light beams successively apart from the both ends of the surface of lower cavity die (2) four right angle is equal, four columniform location unthreaded holes on four columniform location light beams and upper cavity die (1) align, in the centre position on the top of the left cell wall of low groove, a lower semi-circular through hole is set, lower semi-circular hole is communicated with low groove.
4. prepare mould according to automobile-used carbon fibre composite shape for hat beam according to claim 1, it is characterized in that, described lower cavity die (2) is equal with the appearance and size of upper cavity die (1), and lower cavity die (2) is equal with upper groove physical dimension with the low groove on upper cavity die (1); Lower cavity die (2) is equal with first manhole physical dimension with the lower semi-circular through hole on upper cavity die (1), and longitudinal plane of symmetry of the axis of rotation of lower semi-circular through hole and first manhole and low groove and upper groove is coplanar.
5. prepare mould according to automobile-used carbon fibre composite shape for hat beam according to claim 1, it is characterized in that, described air bag (3) is a shape, size and upper cavity die (1) attach together with lower cavity die (2) together with the hollow shell part of the identical cuboid of inner chamber that formed, face of cylinder rounding off is adopted to be connected between air bag (3) upper wall, antetheca, lower wall with two walls adjacent in rear wall, air bag (3) adopts polytetrafluoroethylene (PTFE) material, and the thickness of air bag (3) is 2 ~ 5mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520885751.6U CN205112423U (en) | 2015-11-09 | 2015-11-09 | Automobile -used carbon -fibre composite shape for hat roof beam preparation mould |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520885751.6U CN205112423U (en) | 2015-11-09 | 2015-11-09 | Automobile -used carbon -fibre composite shape for hat roof beam preparation mould |
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| CN205112423U true CN205112423U (en) | 2016-03-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105216342A (en) * | 2015-11-09 | 2016-01-06 | 吉林大学 | Automobile-used carbon fibre composite shape for hat beam preparation method and mould |
| CN112078152A (en) * | 2020-09-25 | 2020-12-15 | 中车长春轨道客车股份有限公司 | Method and mold for molding carbon fiber composite material part |
| CN113370557A (en) * | 2021-06-15 | 2021-09-10 | 浩珂科技有限公司 | Preparation method of carbon fiber square tube |
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2015
- 2015-11-09 CN CN201520885751.6U patent/CN205112423U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105216342A (en) * | 2015-11-09 | 2016-01-06 | 吉林大学 | Automobile-used carbon fibre composite shape for hat beam preparation method and mould |
| CN105216342B (en) * | 2015-11-09 | 2018-03-06 | 吉林大学 | Automobile-used carbon fibre composite shape for hat beam preparation method and mould |
| CN112078152A (en) * | 2020-09-25 | 2020-12-15 | 中车长春轨道客车股份有限公司 | Method and mold for molding carbon fiber composite material part |
| CN113370557A (en) * | 2021-06-15 | 2021-09-10 | 浩珂科技有限公司 | Preparation method of carbon fiber square tube |
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