CN1169326A - Process for producing fiber-reinforced thermoplastic racket frame - Google Patents
Process for producing fiber-reinforced thermoplastic racket frame Download PDFInfo
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- CN1169326A CN1169326A CN97110070A CN97110070A CN1169326A CN 1169326 A CN1169326 A CN 1169326A CN 97110070 A CN97110070 A CN 97110070A CN 97110070 A CN97110070 A CN 97110070A CN 1169326 A CN1169326 A CN 1169326A
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Abstract
A method producing FRTP racket frame with high intension, high quality and high uniformity is provided. The steps are as follows. Strip-shaped or wide FRTP profile is intertwined on a mandrel to form tubular preform. The strip-shaped profile includes thermoplastic resin films supplying matrix resin and a layered part of strip-shaped strengthening fiber bundle, which is arranged among the thermoplastic resin films. Thermoplastic resin film is joined by fusion along the edge of the layered part on the longitudinal direction. The wide profile includes the strip-shaped profile which is arranged into one line. The adjacent strip-shaped profile pairs form lap part by mutual lap joint. The side edges of the strengthening fiber bundle on the longitudinal direction of the strengthening fiber bundle in the adjacent strip-shaped profile pairs are close to each other. The adjacent strip-shaped profile pairs are joined by fusion on the lap part and the strengthening fiber bundle has single orientation.
Description
The present invention relates to produce the technology of official ball frame, these rackets comprise: tennis racket, squash (racquetball) racket, squash racket (squash rackets) and racket.The present invention be more particularly directed to producd fibers enhancement mode [pad is referred to as " FRTP " after moulding) technology of racquet frame.According to the present invention, simplified the operation of twining the FRTP section bar, the selection of fortifying fibre orientation has the bigger free degree, even in the zonule of FETP, even the FRTP section bar that a large amount of fortifying fibres are arranged in every bundle FRTP section bar with bigger fibre bundle center distance when plug twines, the density of fortifying fibre is almost constant, and can there be the loose or rich resin region of fiber on every side at the infall of fortifying fibre or at it, therefore can obtain high strength, the FRTP moulding material of high-quality and high uniformity, this technology have proposed to make around plug winding of band-type FRTP section bar or wide type FRTP section bar the step of preform; Banded FRTP section bar comprises a laminate, and this laminate comprises the thermoplastic resin film that matrix resin is provided and place banded reinforcing fibre bundle between the thermoplastic resin film that the thermoplastic resin film fuses together in the edge along the laminate length direction; Wide type FRTP section bar comprises some banded FRTP section bars, they are line arrangement makes adjacent a pair of banded FRTP section bar overlap the formation clinch mutually, form the side portion of the reinforcing fibre bundle in the adjacent a pair of banded FRTP section bar thus, along each side portion of reinforcing fibre bundle length direction mutually near and put, adjacent a pair of banded FRTP section bar is welded together at clinch, makes on the same direction of being oriented in of reinforcing fibre.
As the technology of traditional production FRTP frame, a kind of technology of producing tennis racket frame is known, in this technology the FRTP section bar is twined around plug and makes the frame preform.(U.S. Patent No. 4871491 etc.)
In this class production technology, use following section bar:
1) every bundle comprises a large amount of fibers (about 12000) fibre bundle, and they are made of the reinforcement carbon fiber and the matrix resin fiber of blending;
2) apply to strengthen carbon fiber by the matrix resin powder and make matrix resin powder partial melting and the section bar that obtains;
3) the banded section bar that forms by strengthening the combination of carbon fiber and matrix resin;
4) with above-mentioned 1) the blend fibre bundle be arranged in a row and by pressurized down heating make it fuse together the section bar that obtains.
Yet, use above-mentioned 1 according to the traditional handicraft of producing the FRTP frame) and during class blend fibre bundle, fiber is microscler and has almost to be the section of circle; Although therefore make fibre bundle twine the flat shape that fibre bundle is stretched and temporarily obtain fibre bundle around longitudinal bodies with high-tension, but because this flat shape does not heat under pressurized and just can keep, can change the rich resin region of meeting appearance in (that is to say, the zone of " sparsity structure " can occur) gap between the fibre bundle of winding so in the small size that twines the made mold pressing frame of blend fibre around plug, strengthen the density of carbon fiber.
In addition, make when strengthening carbon fiber and intersecting when blend fibre twines in the cross-helicity mode, the infall of strengthening carbon fiber becomes not only thick but also thick.When the preform of making when such blending carbon fiber heats, strengthen the carbon fiber absent-mindedness that becomes under pressurized, perhaps can the generation bubble near strengthening that carbon fiber intersects, the preform that makes like this is also thicker.In addition, also rich resin region can appear between the reinforcement carbon fiber bundle that twines.
In addition, use this class blend fibre to be difficult for obtaining uniform frame, because be difficult to make reinforcement carbon fiber and the equally distributed fibre bundle of matrix resin fiber.
Moreover, use this fibrid wrapping around the time, the friction of anchor clamps or analog causes the part wearing and tearing of strengthening carbon fiber, thereby causes fluffing.Strengthen carbon fiber in this case and can produce dust, the intensity of strengthening carbon fiber also can descend.
Use above-mentioned 3) class or 4) during the class section bar,, need heat when therefore twining so that it is softening because this section bar can not twine too firmly at normal temperatures.Put into the die cavity of clapping the pivot shape for the preform that will twine back formation in addition, need preform is curved the frame shape, but the very difficult section bar that will twine state heats again.
Make reinforcement and when twining, make the direction of strengthening carbon fiber with frame preform center line when rectangular when use strengthening carbon fiber, need that a kind of width is big, fibre length weak point and pliable and tough FRTP section bar; Yet above-mentioned 3) the class section bar is too hard at normal temperatures, and heating can make to be strengthened the carbon fiber absent-mindedness or separate, on the other hand, when using above-mentioned 1) fibrid bundle or above-mentioned 2) or 4) can occur during the class section bar bundle dividing from; Therefore from above 1-4 class material, can not make wide type section bar.
This paper uses to give a definition:
Circle: of the FRTP section bar feed mechanism of the device of winding FRTP section bar is back and forth complete.
Bundle: do not cut with scissors continuous fibre bundle together.
Strand: an one way on the winding section device, the axle of wherein banded FRTP section bar and plug are a direction and twine.
Layer: with a series of winding circles that the mode of 2 bursts of closed figures forms, one is+α ° angle, and another strand is-α ° angle.
Find out from above situation, the technology that the purpose of this invention is to provide a kind of FRTP of production frame, according to this technology, the operation of twining the FRTP section bar has become easily, the selection of reinforcing fibre orientation has the big free degree, even in the zonule of FRTP, even in every bundle FRTP section bar, have add thermal fiber in a large number the FRTP section bar with bigger fibre bundle center distance when plug twines, the density of reinforcing fibre is almost constant, and can not occur fiber absent-mindedness or rich resin region on every side at the infall of reinforcing fibre or at it, can obtain the FRTP pressing of high strength high-quality and high uniformity like this.
The present invention achieves the above object by the technology that a kind of producd fibers reinforced thermoplastic product are provided on the whole, and this technology may further comprise the steps:
The preparation one around pipe as preform, this preform limits space in, this preform is by making around the fiber reinforced thermoplastic section bar of plug winding of band-type, the reinforced thermoplastic section bar of above-mentioned ribbon-like fibre comprises a laminate, this laminate comprises the film of some supply matrix resins and the banded reinforcing fibre bundle between film, and above-mentioned film is welded together than reinforcing fibre beamwidth and in the edge along stratiform thing length direction;
Plug is taken out from preform;
Preform is put into mould with the cavity that limits by inwall;
The heating preform makes the thermoplastic resin fusing, pressurizes to the inwall of cavity from the interior space of preform simultaneously;
The cooling preform;
Fiber reinforced thermoplastic thing is taken out from mould.
More particularly, according to first kind of situation of the present invention, achieve the above object by the technology that a kind of FRTP of production frame is provided, this technology may further comprise the steps:
The preparation one around pipe as preform, this preform limits space in, this preform is by making around plug winding of band-type FRTP section bar, above-mentioned banded FRTP section bar comprises a laminate, this laminate comprises the film of some supply matrix resins and the banded reinforcing fibre bundle between film, every tunic is made of the thermoplastic resin with certain fusing point, and film is welded together than reinforcing fibre beamwidth and in the edge along stratiform thing length direction;
Plug is taken out from preform;
Preform is put into the mould of the cavity of inwall qualification with frame shape;
Under the temperature that is the thermoplastic resin fusing point at least, heat preform, pressurize to the inwall of cavity from the interior space of preform simultaneously;
The cooling preform makes its hardening to obtain the FRTP frame;
The FRTP frame is taken out from mould.
According to second kind of situation of the present invention, achieve the above object by the technology that a kind of FRTP of production frame is provided, this technology may further comprise the steps:
The preparation one around pipe as preform, this preform limits space in, this preform is made by twine wide type FRTP section bar around plug, wide shape FRTP section bar comprises some banded FRTP section bars, each banded FRTP section bar comprises a stratiform thing, above-mentioned stratiform thing comprises the film of some supply matrix resins and the banded reinforcing fibre bundle between film, and every tunic is made of the thermoplastic resin with certain fusing point, and film is welded together than reinforcing fibre beamwidth and in the edge along stratiform thing length direction; Above-mentioned some banded FRTP section bar alignings overlap mutually to form the side portion that clinch also is formed on reinforcing fibre bundle in the adjacent a pair of banded FRTP section bar thus adjacent a pair of banded FRTP section bar, each side portion is arranged along the length direction of reinforcing fibre bundle is close, adjacent a pair of banded FRTP section bar is welded together at clinch, makes the single direction that is oriented in of reinforcing fibre;
From preform, take out plug;
Preform is put into the mould of the cavity that limits by inwall with frame shape;
Under the temperature that is the thermoplastic resin fusing point at least, heat preform, pressurize to the inwall of cavity from the interior space of preform simultaneously;
The cooling preform makes its hardening to obtain the FRTP frame;
The FRTP frame is taken out from mould.
In above-mentioned first kind of situation of the present invention, the FRTP section bar can twine around the plug with the inclination of plug major axis.
Above-mentioned first kind of situation of the present invention and second kind of situation also can comprise such step: twined the second wide type FRTP section bar around preform before preform is put into mould, the method for winding is to make the direction of reinforcing fibre and the center line quadrature of preform.
In addition, above-mentioned first kind of situation of the present invention and second kind of situation also can comprise such step: twined the second wide type FRTP section bar around preform before preform is put into mould, the method for winding is to make the direction of reinforcing fibre parallel with the center line of preform.
The above-mentioned second wide type FRTP section bar can have same structure with the wide type FRTP section bar that uses in second kind of situation of the present invention.
" winding " of the present invention comprises following manner, for example: the FRTP section bar is twined around the plug spiral; With continuous winding of cross-helicity mode it is intersected around plug the FRTP section bar, make the FRTP section bar be parallel to (0 ° of winding angle) plug major axis ground and twine around plug, and similar fashion.
Technology according to production FRTP frame of the present invention, special step in conjunction with winding of band-type FRTP section bar, this section bar can not cause the separation of reinforcing fibre bundle in the both sides of its length direction, and this section bar is not only thin not only gentle but also flat, therefore makes winding operation more convenient and can finish at short notice; In addition, the selection of reinforcing fibre orientation has the big free degree, easier formation multilayer, even in the zonule of FRTP, even the FRTP type that a large amount of fortifying fibres are arranged in every bundle FRTP section bar with bigger fibre bundle center distance when plug twines, the density of reinforcing fibre is almost constant, and the infall of reinforcing fibre can chap, and at the infall of reinforcing fibre or around it, can not produce the loose or rich resin region of fiber.
In addition, because the matrix resin in the above-mentioned FRTP section bar is each the lip-deep film that is positioned at flat reinforcing fibre bundle, therefore protected the reinforcing fibre bundle; Like this when section bar when plug twines, even section bar since tension force and compressing fixture also can not play fine hair owing to friction makes reinforcing fibre therefore can avoid because the reinforcing fibre that the reinforcing fibre fluffing causes rises grey and stiffening effect weakens.Even moreover bigger in the quantity of an intrafascicular contained reinforcing fibre of reinforcing fibre, all fibers still wrap in the matrix resin easily.
Therefore, by the technology of production FRTP frame of the present invention, can make the FRTP pressing of high-quality, high uniformity.Further advantageously, this pressing has stable intensity, and it can satisfy the design of high request, and can obtain the product that in light weight, size is big, improve antifatigue or stretching durability.
In addition, be soft and unheavy by twining preform that above-mentioned FRTP section bar makes, be easy in mould, place preform, so forming operation needs high skill more easily and not.
Moreover, since the FRTP section bar very softness can make when twining and not interspace between the levels FRTP section bar, therefore, even internal drop is low between shaping period, the FRTP section bar also can be in full accord with the shape of mould.
Also have, because the material of reinforcing fibre bundle can select for use for example every bundle of inexpensive reinforcing fibre bundle to have the carbon fiber bundle of 12000 fibers, therefore used section bar is inexpensive, has reduced the cost of prepared FRTP frame like this.
In addition, when the wide type FRTP section bar that in conjunction with following step is the above-mentioned type twines its mode around preform is when making the center line quadrature of reinforcing fibre and preform, the advantage of gained is: the part that the wide type FRTP section bar in footpath twines is strengthened, and can obtain high-intensity frame thus.
Fig. 1 is the sectional drawing of banded FRTP section bar used in the FRTP frame technology produced according to the invention;
Fig. 2 is the sectional drawing according to wide type FRTP section bar used in the production FRTP frame technology of the present invention;
Fig. 3 is the side view that twines, and wherein is wrapped on the plug with banded FRTP section bar shown in Figure 1;
Fig. 4 is the side view that twines, and it shows the method for winding of band-type FRTP section bar;
Fig. 5 A, 5B show the ground floor that is twined out by a kind of winding method, in the method, have formed one of one and negative angle of positive angle with respect to the axle that extends along the plug length direction; Fig. 5 A shows the side view of ground floor; Fig. 5 B is half a sectional drawing of plug and ground floor;
Fig. 6 A, 6B show the second layer that twines out with a kind of winding method, in the method, and with respect to winding angle β=0 of plug center line; Fig. 6 A shows the side view of the second layer; Fig. 6 B is half a sectional drawing of plug and the second layer;
Fig. 7 A, 7B show the 3rd layer (outermost layer) by the formed laminated element of a kind of helical wrapping method, in the method, have formed with respect to plug 12 center lines 13 two strands for positive and negative winding angle γ, and Fig. 7 A is a side view; Fig. 7 B is a sectional drawing;
Fig. 8 is resulting around the pipe side view by twining the FRTP section bar;
Fig. 9 is the stereogram around pipe that curves the tennis racket shaped as frame;
Figure 10 is the stereogram of the preform strengthened by other FRTP section bar, wherein wide type FRTP section bar partly twines around the preform that will become head, its canoe is, the length direction of the reinforcing fibre in wide type FRTP section bar at right angles extends with the center line of preform, another wide type FRTP section bar partly twines around the preform that will become handle portion, canoe is that the length direction of reinforcing fibre extends along the direction that is parallel to the preform center line.
Figure 11 is the plane of tennis racket frame model;
Figure 12 is the plane according to the prepared FRTP frame of production frame technology of the present invention.
To explain the example of production FRTP frame technology of the present invention below.The example of these production technologies has been set forth aspects more of the present invention simply; But the present invention is not limited to these examples.Can make a change these manufacturing process within the scope of the invention.
The example of the FRTP section bar that FRTP racquet frame technology at first produced according to the invention below is used is described.
Fig. 1 shows first example of FRTP section bar.The banded FRTP section bar of number in the figure 1 expression.
Banded FRTP section bar 1 has the main body of the Bao Youping again that comprises stratiform thing 4, wherein banded reinforcing fibre bundle 2 is (each thermoplastic resin film 3 and 3 is wide than reinforcing fibre bundle 2) between the thermoplastic resin film 3 and 3 that matrix resin is provided, and wherein thermoplastic resin film 3 and 3 is welded together at each limit portion 5 and 5 places along the length direction of stratiform thing 4.
Above-mentioned banded reinforcing fibre bundle 2 has and the main body of Bao Youping, and it is made of the circle cross section fibre bundle or the carbon fiber of the disconnection with 6000-24000 root fiber.The thickness of banded reinforcing fibre bundle 2 is 1mm at the most, preferably is 0.5mm at the most.The width of banded reinforcing fibre bundle 2 is 4 times of its thickness at least, preferably 10 of thickness times.In this example, the reinforcing fibre that constitutes banded reinforcing fibre bundle 2 can be aramid fibre (aramid fiber), glass fibre, carbon fiber or analog.In the present invention, reinforcing fibre 2 does not preferably comprise any twisted fiber, even or comprise, the twisted fiber rate also should be lower.
Thermoplastic resin film 3 thickness is 100 μ m at the most, is preferably to be at most 50 μ m, preferably 5-30 μ m.Thermoplastic resin film 3 width should be when above-mentioned banded reinforcing fibre bundle 2 is placed between thermoplastic resin film 3 and 3, reinforcing fibre bundle 2 can not stretch out from the limit portion 5 and 5 of stratiform thing 4, and thermoplastic resin film 3 and 3 can be melted in the limit portion 5 and 5 that forms stratiform thing 4 together.
The thermoplastic resin that constitutes thermoplastic film 3 can be polyamides ester, Merlon, polyphenylene oxide (polyphenyleneoxide), polyetherimide (polyetherimide) or analog.
Many holes (not shown) is preferably arranged in above-mentioned thermoplastic resin film 3, and the size in hole should be in diameter be 100 μ m-1mm scopes, and the distribution in hole can be 1-50 hole/cm
2
The filament of the banded FRTP section bar made from thermoplastic resin film 31 with such hole twine and preform, when the heating preform, because interior pressure effect, stay the outside that bubble in the banded reinforcing fibre bundle 2 can be discharged into banded FRTP section bar through the hole.Therefore can remaining pore in the frame that makes like this.
The thickness of banded FRTP section bar 1 is at most 1.0mm, is preferably between 0.1-1.0mm, preferably is at most 0.5mm.The width of banded FRTP section bar 1 is between 5-35mm.
In above-mentioned banded FRTP section bar 1, banded reinforcing fibre bundle 2 is represented by the volume fraction (Vf) of reinforcing fibre with respect to thermoplastic resin film 3 volume fraction, is approximately 30-60%.Certain above-mentioned volume fraction is not limited thereto scope, and the amount (Vf) of the reinforcing fibre that it can comprise according to needs in frame is decided.In addition, number number of banded reinforcing fibre bundle 3 can be decided according to the Vf value.
Fig. 2 shows second example of FRTP section bar.The wide type FRTP section bar of number in the figure 10 expressions.
Wide type FRTP section bar 10 comprises some (among the figure being 6) banded FRTP section bar 1 as shown in Figure 1, they are arranged in a row, adjacent a pair of banded FRTP section bar 1 and 1 is overlapped mutually, form clinch 10a, reinforcing fibre bundle 2 in adjacent a pair of banded FRTP section bar 1 and 1 and 2 side portion 2a and 2a are adjacent to each other, adjacent a pair of banded FRTP section bar 1 and 1 is in clinch 10a place fusion, thus reinforcing fibre be oriented to a direction.
Preferably as far as possible little along side portion 2a and the gap width W between the 2a on the length direction of the reinforcing fibre bundle 2 in above-mentioned adjacent paired banded FRTP section bar 1 and 1 and 2.By being overlapped mutually, reinforcing fibre bundle 2 in above-mentioned adjacent paired banded FRTP section bar 1 and 1 and 2 side portion 2a and 2a make gap width W be reduced to zero.If in the above-mentioned adjacent paired banded FRTP section bar 1 and 1 between the reinforcing fibre bundle 2 and 2 gap width W too big, the density of reinforcing fibre in the zonule, can change or when by wide type FRTP section bar 10 when the preform that plug is made heats under pressurized, rich resin region can appear in the gap location between the reinforcing fibre bundle 2 and 2.
The thickness of wide type FRTP section bar 10 is at most 1.0mm, is preferably between 0.1-1.0mm, preferably is at most 0.5mm.
The FRTP section bar 1 and 10 that the present invention is used can twining to form preform 44 around plug 12 such as following explanation.
To explain below and use above-mentioned FRTP section bar to produce the example of FRTP frame technology.
In this embodiment, description be the production technology of tennis racket frame, use racquet frame yet this production technology also can be used for the match of other class, as squash racket, squash racket and racket.
At first as shown in Figure 3, as shown in Figure 1 banded FRTP section bar 1 is twined around rotating plug 12, this plug is covered by an inflatable tubular plastic soft shell 17.
The device of winding section comprises a rotating driver, elongated plug 12 and FRTP section bar feeding machine, and this feeding machine is along the vertical back and forth movement of the length of plug 12.When the feeding machine moves along a direction of plug 12, twine FRTP section bar 1 spirally, when moving in the opposite direction then, twine FRTP section bar 1 with the angle opposite with former angle with a constant angle.
This spiral twines and proceeds to continuously till the number of turns of covering plug 12 side faces required on the positive and negative both direction of FRTP section bar 1.
After in case the ground floor 16 that covers plug 12 side faces with FRTP section bar 1 has twined, then the similar approach of selecting by the designer twine subsequently layer.
Among Fig. 4, the first lap of FRTP section bar 1 is expressed as FRTP section bar 1a, and it twines at a certain angle, and this angle is generally approximate+45 ° with respect to the major axis 13 of plug 12.Second circle of FRTP section bar twines and is expressed as FRTP section bar 16 in the opposite direction, and it is similar to-45 ° angle winding with the major axis 13 with respect to plug 12.The number of turns of ensuing FRTP section bar is expressed as FRTP section bar 1c, 1d, 1e and 1f etc., and they twine in the same way till covering plug 12.This winding forms the ground floor 16 around plug 12.
Fig. 5 A and 5B show the ground floor 16 that is twined out by a kind of winding method, in the method, have formed one of one and negative angle of positive angle with respect to the center line 13 of plug 12; Fig. 5 A shows the side view of ground floor; Fig. 5 B is half a sectional drawing of plug 12 and ground floor 16.
Half sectional drawing of plug 12 and ground floor 16 shows two strands of FRTP section bar ± 45.By positive and negative winding angle+α ,-length of the arc 14 that α forms depends on the width of banded FRTP section bar 1 and the winding angle of FRTP section bar 1.In this example, winding angle α is 45 °, and the diameter layer of plug 12 can cover plug 12 calculating by twining 9 circles.
Then, on the ground floor 16 of above formation, shown in Fig. 6 A, 6B, be wrapped in FRTP section bar 1 and form the second layer (intermediate layer) 18.Fig. 6 A, 6B show the second layer 18 that is twined out by a kind of winding direction, in the method, and with respect to winding angle β=0 of plug 12 center lines 13 or be parallel to center line; Fig. 6 A shows the side view of the second layer 18; Fig. 6 B is half a sectional drawing of plug 12 and the second layer 18.In this embodiment, half sectional drawing of the plug 12 and the second layer 18 show to need just to cover around 12 circles with the winding angle of β=0 ° the side face of the ground floor 16 on the plug 12 among Fig. 6 B.The length of arc 15 equals the width of FRTP section bar 1.
On the second layer 18, shown in Fig. 7 A, 7B, twine FRTP section bar 1 and form the 3rd layer (outermost layer) afterwards.Fig. 7 A, 7B show the 3rd layer 19 of this layer structure, and its winding method is the center line 13 with respect to mandrel 12, and forming with winding angle γ has two strands of positive and negative angle shown in Fig. 5 A, 5B; Fig. 7 A is the 3rd layer a side view; Fig. 7 B is an inflatable soft shell 17 and around pipe 44 sectional drawing, around pipe 44 by FRTP section bar 1 being wrapped in ground floor 16 on inflatable soft shell 17 side faces with angle ± α, FRTP section bar 1 being wrapped in the second layer 18 on ground floor 16 peripheries with angle ± β ° and the 3rd layer 19 that FRTP section bar 1 is wrapped in angle ± γ on the second layer 18 peripheries constitutes.In this embodiment, γ is chosen to be 45 °, therefore needs 9 circles could cover the side face of the second layer 18 on the plug 12.
Therefore, shown in Figure 8ly constitute by ground floor 16, the second layer 18 and the 3rd layer 19 around pipe 44.Around pipe 44 promptly is the preform 44 of frame.Label 44d represents the axle (being center line) of preform 44 among Fig. 8.
The positive angle of FRTP section bar one around the angle be preferably in+20 °-+60 ° between.One be preferably between-20 °-60 ° of the angle of FRTP section bar around the angle.
In addition, although these conditions may become with the desired intensity of frame in meeting, be between adjacent two FRTP section bars 1 and 1, not stay the gap around the better mode that plug 12 twines stratification with FRTP section bar 1.Better canoe is that edge part along the length direction of the reinforcing fibre bundle 2 in each adjacent a pair of FRTP section bar 1 and 1 almost contacts with the edge part of another FRTP section bar winding.
Moreover, in order to strengthen each several part (the head construction part 29 that for example will become the hoop-like head of frame described below maybe will become the grip structure part 30 of handle portion), can in pipe (preform) 44, insert enhancement layer, the formation of this layer is: with winding angle is that 0 ° or 90 ° are wrapped in fritter FRTP section bar 10 between each layer of FRTP section bar 1, perhaps is entangled in interior or outermost layer.
Because above-mentioned FRTP section bar 1 and 10 and by the preform 44 that twines FRTP section bar 1 and 10 gained be not wet and also be pliable and tough, so when with preform when plug 12 takes out afterwards and do processing as described below, preform can keep its structure.
As shown in Figure 8, when with plug 12 after around pipe (preform) 44 and soft shell 17, taking out, by the central part with preform 44 and soft shell 17 curve as shown in Figure 9 hoop-like and with the two ends of preform 44 and make preform 44 curve the shape of tennis racket frame together.Curve mainly being made up of the head component part 29 that will become the hoop-like head and the handle component part 30 that will become bar-shaped handle around pipe (being preform 44) of frame shape, handle is wherein also formed by the two ends of preform 44 together.The root place that constitutes head part 29 fork connecting portion 39 closely arranged so that fork couples together.
Next, before being placed on the soft shell 17 in preform 44 and the preform 44 in the mould as described below 45, preferably by as shown in figure 10 above-mentioned wide type FRTP section bar 10 is provided the reinforcement of a head component part 29 around head component part 269 places of preform 44, canoe wherein is to make the length direction of the reinforcing fibre in wide type FRTP section bar 10 and the center line 44d quadrature of preform 44.In this case, although this writhing number changes with the intensity that frame requires, the writhing number of the wide type FRTP section bar 10 that twines around head component part 29 can be half-turn to two circle, preferably near a circle.Therefore, the length of wide type FRTP section bar 10 only is that it enough covers the length of head component part 29 side faces at least, that is to say, the length of wide type FRTP section bar 10 be half of head component part 29 girths to twice, said head part is the center with center line 44d.On the other hand, the width of wide type FRTP section bar 10 can be approximately equal to the girth of the hoop part of head component part 29, also can be narrower slightly.
Although in above-mentioned winding method, adopted, wide type FRTP section bar 10 of the present invention in the length of machine direction less than its width, yet it can not cause the separation of reinforcing fibre, be inserted in and be used to provide between the thermoplastic resin film of matrix resin because be divided in a small amount the reinforcing fibre of fiber element, and the thermoplastic resin film along the edge weld of machine direction together.
In addition, preferably as shown in figure 10, by above-mentioned wide type FRTP section bar 10 is twined the reinforcement that handle component part 30 can be provided around the handle component part 30 of preform 44, canoe wherein is to make the length direction of the reinforcing fibre in wide type FRTP section bar 10 be parallel to the center line 44d of preform 44.In this case, although this writhing number changes with the intensity that frame requires, the writhing number of the wide type FRTP section bar 10 that handle component part 30 is twined can be half-turn to two circle, preferably near a circle.Therefore, the length of wide type FRTT section bar 10 only is that it enough covers the length of handle component part 30 side faces at least, that is to say, the length of wide type FRTT section bar 10 is the length of handle component part 30 or short a little no better than.On the other hand, the width of wide type FRTP section bar 10 can be that half of handle component part 30 girths is to twice.
Next, the frame shape will be curved if the preform 44 that needs also available wide type FRTP section bar 10 to strengthen head component part 29 and/or handle component part 30 is put into mould 45 as shown in figure 11, this mould has cavity 45a, and cavity shape is the same with the shape of tennis racket frame.Cavity 45a comprises the handle model part 50 of the two ends of ringwise head model part 49 and preform 44 among being positioned at.As a kind of alternative method, FRTP section bar 1 can be directly on the plug that does not cover with soft shell, when after pipe (preform) 44 takes out from plug, again with the flexible pipe insertion in pipe.
Then, the section bar that is ready for the fork (not shown) is in addition inserted the fork model part 51 of cavity 45a and link to each other with fork coupling part 39.
Then, the two ends that extend to the soft shell 17 of mould 45 outsides are linked to each other with force pipe 52.After this, close die 45 heats under the melting temperature of thermoplastic resin that is formation thermoplastic resin film 3 at least, makes preform 44 tightly press to the surface of cavity 45 by pressurization in soft shell 17 simultaneously, makes the thermoplastic resin fusing whereby.
Next, make preform 44 sclerosis obtain the FRTP pressing by cooling.Figure 12 shows FRTP frame 60, and it is the FRTP pressing after taking out from mould 45.
This mold pressing FRTP frame 60 comprises head 61, handle portion 62, throat 63 and fork 64.
By boring mesh at the head 61 of FRTP frame 60 and fork 64 places, the cloth that is wrapped at handle 62 places stretches tight string and tennis racket is made in head 61 and fork 64.
Use can increase impact strength, compressive strength and shear strength by the thermoplastic resin plastics that thermoplastic resin film 3 is shaped.
Use the FRTP section bar 1 of said structure and the following properties of 10 generations effect of the present invention:
1) reinforcing fibre in the FRTP section bar 1 and 10 is continuous at length direction.
2) distortion of the reinforcing fibre bundle 2 in the FRTP section bar is less, and fibre bundle 2 is entangled on the plug 12 with tabular, has therefore improved the mechanical strength of FRTP section bar.
3) reinforcing fibre can unrestriced angle twine, but perhaps changes kind of a mode coiled stratiform, and the thickness of layer makes it have satisfactory higher intensity, slight and pliability.
4) by using FRTP section bar 1 and 10 to be prefabricated into around pipe 44 mechanical stiffness and the intensity that improve around pipe.
Use FRTP section bar of the present invention, even when the banded FRTP section bar 1 that contains the reinforcing fibre bundle 2 that constitutes by a large amount of fibers with bigger fibre bundle center distance when plug 12 twines, because the FRTP section bar is banded and wide type, between the FRTP of adjacent winding section bar, produce the gap hardly, even the density of reinforcing fibre does not almost have difference (to that is to say on the small size of FRTP, the zone that can not occur " sparsity structure " basically), rich resin region can not appear in the gap.In addition, because the material of reinforcing fibre bundle 2 can select for use for example every bundle of inexpensive reinforcing fibre bundle to have the carbon fiber bundle of 12,000 fibers, therefore used section bar is inexpensive, has reduced the cost of FRTP frame like this.
Moreover, because FRTP section bar 1 fork is put down again thin and is banded, even be wound in cross-helicity shape so work as FRTP section bar 1, it is not only thick but also thick that the infall of reinforcing fibre can not become, and can avoid the absent-mindedness of reinforcing fibre and rich resin region occur when heating the preform of being made by FRTP section bar 1 like this under pressurized.In addition, because the matrix resin in the FRTP section bar 1 is membranaceous, be positioned on two surfaces of Boping reinforcing fibre bundle 2, usually on the surface of reinforcing fibre bundle 2 with the fiber welding, therefore, even the bigger whole fiber of the fiber number of reinforcing fibre bundle 2 also is included in the matrix resin easily.
In addition, because most of fiber in reinforcing fibre bundle 2 is not and the thermoplastic resin blending, and thermoplastic resin film 3 and 3 marginal portion 5 and 5 that is positioned at FRTP section bar 1 length direction fuses together simultaneously, so section bar is pliable and tough.Moreover, because reinforcing fibre bundle 2 covers by thermoplastic resin film 3 and 3, therefore when section bar when plug 12 twines, reinforcing fibre bundle 2 can and not given prominence to away from the side separation of profile length direction.
Therefore, twined the simplified control of FRTP section bar 1, and can finish winding at short notice.For example consider the periphery of the head component part 29 of preform 44, can twine FRTP section bar 1 by this way easily: make the direction of contained reinforcing fibre and the center line 44d quadrature of preform 44; In this way, can make FRTP section bar 1 be applicable to littler part easily.In addition, even the tension force that is added on the section bar during winding is lower, section bar can be not bulk yet.Can form the gap hardly between FRTP section bar 1 and 1 the levels; Therefore the winding of reinforcing fibre can not relaxed, and occurs the loose district of reinforcing fibre hardly.
Moreover because the matrix resin of above-mentioned FRTP section bar 1 is membranaceous, it is positioned at each surface of flat reinforcing fibre bundle 2 and goes up in order to protection reinforcing fibre bundle 2; Therefore, when section bar 1 when plug 12 twines, even section bar 1 since tension force and compressing fixture also can not go out fine hair owing to friction makes reinforcing fibre therefore can avoid because the reinforcing fibre that the reinforcing fibre fluffing causes rises grey and stiffening effect weakens.Even the quantity of contained reinforcing fibre is bigger in every bundle reinforcing fibre in addition, whole fiber also wraps in the matrix resin easily.
In addition, because FRTP section bar 1 is very thin, the winding multilayer is more convenient, selects the reinforcing fibre orientation that big freedom is also arranged, and therefore can produce the frame that satisfies requirement of strength like this according to the number of plies and the orientation that the requirement of product are changed reinforcing fibre.
In addition, be flexibility and unheavy owing to twine FRTP section bar 1 made preform 44, therefore inject in the mould 45 easily, make forming operation need high skill more easily and not like this.
Moreover, because FRTP section bar 1 is very soft, between the levels of FRTP section bar, do not interspace during winding, even press in therefore between shaping period when low, the FRTP section bar also can be in full accord with the shape of mould.
Therefore, adopt the streamline of this example, can obtain the FRTP molding of high-quality high uniformity as FRTP frame production technology.This molding has stable intensity in addition, can satisfy the design of high request, and can obtain the product that in light weight, size is big, improve antifatigue and stretching durability.
Although should be noted that at making preform 44 and made explanation in this case, yet preform 44 also can use similarity method to be made by wide type FRTP section bar 10 with banded FRTP section bar winding plug 12.
In addition, by the periphery of above-mentioned wide type FRTP section bar 10 around the head component part 29 of preform 44 twined, winding method is to make the length direction of the reinforcing fibre in wide type FRTP section bar 10 and the center line 44d quadrature of preform 44, can make head component part 29 be strengthened being formed in the high frame of head 61 place's intensity like this.
In addition, by the periphery of above-mentioned wide type FRTP section bar 10 around the handle component part 30 of preform 44 twined, method is the center line 44d that makes the parallel prefabrication 44 of length direction of the reinforcing fibre in wide type FRTP section bar 10, can make handle component part 30 be strengthened also being formed in the high frame of handle portion 62 place's intensity like this.
Moreover, although in the example of above-mentioned production FRTP frame, made explanation at the situation of twining the head component part 29 of preform 44 with wide type FRTP section bar 10, wherein canoe is to make the length direction of the reinforcing fibre in the wide type FRTP section bar 10 and the center line 44d quadrature of preform 44, yet the position of twining wide type FRTP section bar 10 is not limited to head component part 29; Can use FRTP section bar 10 to twine the part of the needs reinforcement of preforms 44 according to the intensity that frame requires, its canoe be to make the length direction of the reinforcing fibre in the wide type FRTP section bar 1 and the center line 44d quadrature of preform 44.
Have again, although in the example of above-mentioned production FRTP frame, made explanation at the situation of twining the handle component part 30 of preform 44 with wide type FRTP section bar 10, wherein canoe is to make the length direction of the reinforcing fibre in the wide type FRTP section bar 10 be parallel to the center line 44d of preform 44, yet the position of twining wide type FRTP section bar is not limited to handle component part 30; The intensity that can require according to frame is twined the part that the needs of preforms 44 are strengthened with FRTP section bar 10, and its canoe is to make the length direction of the reinforcing fibre in the wide type FRTP section bar 10 be parallel to the center line 44d of preform 44.
In addition, although in the example of above-mentioned production FRTP frame, at having made explanation, also can make the FRTP section bar between plug twines the FRTP section bar 1 that makes adjacent winding and 1 pair, leave the gap certainly and make preform in situation very close to each other between the FRTP section bar 1 that twines plug 12 formed adjacent windings in layer with FRTP section bar 1 and 1 pair.
Although the present invention describes in detail with reference to some preferred embodiments and some alternative situation, should be known in that this description only for for example, does not have limited significance.It is worthy of note that those skilled in the art can make some changes and draw other embodiments of the invention the details of the embodiment of the invention behind the reference foregoing description.Can think that all these changes and other embodiment are in claims of the present invention scope required for protection and design.
At last, the priority that the application requires is: Japanese patent application No, the Hei:8-52094 applying date are on March 8th, 96, herein with it as reference.
Claims (8)
1, the technology of the reinforced thermoplastic articles of a kind of producd fibers may further comprise the steps:
The preparation one around pipe as preform, this preform limits space in, this preform is by making around the fiber reinforced thermoplastic section bar of plug winding of band-type, the reinforced thermoplastic section bar of above-mentioned ribbon-like fibre comprises a laminate, this laminate comprises the film of some supply matrix resins and the banded reinforcing fibre bundle between film, every tunic is made of thermoplastic resin, and above-mentioned film is welded together than reinforcing fibre beamwidth and in the edge along stratiform thing length direction;
Plug is taken out from preform;
Preform is put into mould with the cavity that limits by inwall;
The heating preform makes the thermoplastic resin fusing, pressurizes to the inwall of cavity from the interior space of preform simultaneously;
The cooling preform;
Fiber reinforced thermoplastic articles is taken out from mould.
2, the technology of the reinforced thermoplastic frame of a kind of producd fibers may further comprise the steps:
The preparation one around pipe as preform, this preform limits space in, this preform is by making around the fiber reinforced thermoplastic section bar of plug winding of band-type, the reinforced thermoplastic section bar of above-mentioned ribbon-like fibre comprises a laminate, this laminate comprises the film of some supply matrix resins and the banded reinforcing fibre bundle between film, every tunic is made of the thermoplastic resin with certain fusing point, and above-mentioned film is welded together than reinforcing fibre beamwidth and in the edge along stratiform thing length direction;
Plug is taken out from preform;
Preform is put into the mould of cavity with the qualification of frame shape inwall;
Under the temperature that is above-mentioned thermoplastic resin fusing point at least, heat preform, pressurize to the inwall of cavity from the interior space of preform simultaneously;
The cooling preform makes its hardening to obtain fiber reinforced thermoplastic frame;
Fiber reinforced thermoplastic frame is taken out from mould.
3, the technology of the reinforced thermoplastic frame of a kind of producd fibers may further comprise the steps:
The preparation one around pipe as preform, this preform limits space in, this preform is made by twine the reinforced thermoplastic section bar of wide fiber type around plug, the fiber reinforced thermoplastic section bar of above-mentioned wide shape comprises the reinforced thermoplastic section bar of some ribbon-like fibres, the reinforced thermoplastic section bar of each ribbon-like fibre comprises a stratiform thing, the stratiform thing comprises the film of some supply matrix resins and the banded reinforcing fibre bundle between film, every tunic is made of the thermoplastic resin with a certain fusing point, and above-mentioned film is than reinforcing fibre beamwidth and along edge's clinkering of stratiform thing length direction together; The reinforced thermoplastic section bar of some ribbon-like fibres aligning overlaps mutually to form the side portion that clinch also is formed on reinforcing fibre bundle in the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre thus the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre, each side portion layout close to each other along the length direction of reinforcing fibre bundle, the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre is welded together at clinch, and the orientation of reinforcing fibre can be at single direction like this;
From preform, take out plug;
Preform is put into the mould of cavity with the qualification of frame shape inwall;
Under the temperature that is the thermoplastic resin fusing point at least, heat preform, pressurize to the inwall of cavity from the interior space of preform simultaneously;
The cooling preform makes its hardening to obtain fiber reinforced thermoplastic frame;
Fiber reinforced thermoplastic frame is taken out from mould.
4, the technology of the reinforced thermoplastic section bar of producd fibers as claimed in claim 2, wherein fiber reinforced thermoplastic section bar twines around the plug with the inclination of plug major axis.
5, as in order to the technology that requires the reinforced thermoplastic section bar of 2 described producd fibers, also comprise the steps: before preform is put into mould, to twine the reinforced thermoplastic section bar of the second wide fiber type around preform;
The fiber reinforced thermoplastic section bar of the above-mentioned second wide shape comprises the reinforced thermoplastic section bar of some ribbon-like fibres, the reinforced thermoplastic section bar of each ribbon-like fibre comprises a stratiform thing, above-mentioned stratiform thing comprises the film of some supply matrix resins and the banded reinforcing fibre bundle between film, every tunic is made of the thermoplastic resin with certain fusing point, and above-mentioned film is welded together than reinforcing fibre beamwidth and in the edge along stratiform thing length direction; The reinforced thermoplastic section bar of some ribbon-like fibres aligning overlaps mutually to form clinch the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre, and be formed on the side portion of reinforcing fibre bundle in the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre thus, each side portion layout close to each other along the length direction of reinforcing fibre bundle, the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre is welded together at clinch, and the orientation of reinforcing fibre can be at single direction like this;
Wherein the canoe of the reinforced thermoplastic section bar of the second wide fiber type is to make the direction of reinforcing fibre and the center line quadrature of preform.
6, the technology of the reinforced thermoplastic section bar of producd fibers as claimed in claim 3 comprises that also such step twined the reinforced thermoplastic section bar of the second wide fiber type around preform before preform is put into mould;
The fiber reinforced thermoplastic section bar of the above-mentioned second wide shape comprises the reinforced thermoplastic section bar of some ribbon-like fibres, the reinforced thermoplastic section bar of each ribbon-like fibre comprises a stratiform thing, above-mentioned stratiform thing comprises the film of some supply matrix resins and the banded reinforcing fibre bundle between film, and film is welded together than reinforcing fibre beamwidth and in the edge along stratiform thing length direction; The reinforced thermoplastic section bar of above-mentioned some ribbon-like fibres aligning overlaps mutually to form clinch the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre, and be formed on the side portion of reinforcing fibre bundle in the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre thus, each side portion layout close to each other along the length direction of reinforcing fibre bundle, the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre is welded together at clinch, and the orientation of reinforcing fibre can be at single direction like this;
Wherein the canoe of the reinforced thermoplastic section bar of the second wide fiber type is to make the direction of reinforcing fibre and the center line quadrature of preform.
7, the technology of the reinforced thermoplastic section bar of producd fibers as claimed in claim 2 also comprises such step: twined the reinforced thermoplastic section bar of the second wide fiber type around preform before preform is put into mould;
The fiber reinforced thermoplastic section bar of the above-mentioned second wide shape comprises the reinforced thermoplastic section bar of some ribbon-like fibres, the reinforced thermoplastic section bar of each ribbon-like fibre comprises a stratiform thing, above-mentioned stratiform thing comprises the film of some supply matrix resins and the banded reinforcing fibre bundle between film, and film is welded together than reinforcing fibre beamwidth and in the edge along stratiform thing length direction; The reinforced thermoplastic section bar of some ribbon-like fibres aligning overlaps mutually to form clinch the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre, and be formed on the side portion of reinforcing fibre bundle in the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre thus, each side portion layout close to each other along the length direction of reinforcing fibre bundle, the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre is welded together at clinch, and the orientation of reinforcing fibre can be at single direction like this;
Wherein the canoe of the reinforced thermoplastic section bar of the second wide fiber type is to make the direction of reinforcing fibre parallel with the center line of preform.
8, the technology of the reinforced thermoplastic section bar of producd fibers as claimed in claim 3 also comprises such step: twined the reinforced thermoplastic section bar of the second wide fiber type around preform before preform is put into mould;
The fiber reinforced thermoplastic section bar of the above-mentioned second wide shape comprises the reinforced thermoplastic section bar of some ribbon-like fibres, the reinforced thermoplastic section bar of each ribbon-like fibre comprises a stratiform thing, above-mentioned stratiform thing comprises the film of some supply matrix resins and the banded reinforcing fibre bundle between film, and film is welded together than reinforcing fibre beamwidth and in the edge along stratiform thing length direction; The reinforced thermoplastic section bar of some ribbon-like fibres aligning overlaps the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre mutually, to form the side portion that clinch also is formed on reinforcing fibre bundle in the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre thus, each side portion layout close to each other along the length direction of reinforcing fibre bundle, the reinforced thermoplastic section bar of adjacent a pair of ribbon-like fibre is welded together at clinch, and the orientation of reinforcing fibre can be at single direction like this;
Wherein the canoe of the reinforced thermoplastic section bar of the second wide fiber type is to make the direction of reinforcing fibre parallel with the center line of preform.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52094/96 | 1996-03-08 | ||
| JP8052094A JPH09239071A (en) | 1996-03-08 | 1996-03-08 | Production of frtp racket frame |
| JP52094/1996 | 1996-03-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1169326A true CN1169326A (en) | 1998-01-07 |
| CN1145549C CN1145549C (en) | 2004-04-14 |
Family
ID=12905260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB971100705A Expired - Fee Related CN1145549C (en) | 1996-03-08 | 1997-03-08 | Process for producing fiber-reinforced thermoplastic racket frame |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH09239071A (en) |
| CN (1) | CN1145549C (en) |
| TW (1) | TW339278B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4592573B2 (en) * | 2005-12-01 | 2010-12-01 | 三菱重工業株式会社 | Tape sticking route setting method and program, and tape sticking apparatus |
-
1996
- 1996-03-08 JP JP8052094A patent/JPH09239071A/en not_active Withdrawn
-
1997
- 1997-02-20 TW TW086102051A patent/TW339278B/en active
- 1997-03-08 CN CNB971100705A patent/CN1145549C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| TW339278B (en) | 1998-09-01 |
| JPH09239071A (en) | 1997-09-16 |
| CN1145549C (en) | 2004-04-14 |
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