CN1111537A - Strong and fine racket frame of fiber-reinforced thermoplastic resin and process of fabrication thereof - Google Patents
Strong and fine racket frame of fiber-reinforced thermoplastic resin and process of fabrication thereof Download PDFInfo
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- CN1111537A CN1111537A CN94120054A CN94120054A CN1111537A CN 1111537 A CN1111537 A CN 1111537A CN 94120054 A CN94120054 A CN 94120054A CN 94120054 A CN94120054 A CN 94120054A CN 1111537 A CN1111537 A CN 1111537A
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- reinforcing fiber
- fiber bundles
- racket frame
- banded
- matrix
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Abstract
The invention relates to a racket frame used for the physical culture, the racket frame is made of reinforced fabric thermoplastic resin, reinforced fabrics (1 and 11) are arranged in single direction or the reinforced fabric is produced into a strip shape and arranged in a thermoplastic resin matrix (7a), thus a gap is uneasy to be formed in the matrix.
Description
The present invention relates to a kind of racket frame, fortifying fibre thermoplastic resin racket frame and manufacturing process thereof that particularly a kind of physical culture is used.
People's tennis used in everyday and racket, its framework is made with the fortifying fibre thermoplastic resin.A kind of manufacture craft of typical framework is as follows, at first, the matrix fiber of some nylon or Merlon is made into a matrix fiber, and makes some matrix fibers make a matrix fiber bundle.And then the reinforcing fiber bundles that some matrix fiber bundles and glass fibre or carbon fiber are made mixed, and matrix fiber bundle and reinforcing fiber bundles are made into hybrid yams.
Again hybrid yams is woven into a round buss, and this round buss is placed in the mould it is heated makes racket frame.
The manufacture craft of another kind of prior art is, reinforcing fiber bundles and matrix fiber bundle are woven into a round buss, and its method of moulding is similar to the method for first kind of prior art.
Existing reinforcing fiber bundles is often used low-cost carbon fiber, and for example " 12K ", (tex value) is very big for number numerical value of " 12K " carbon fiber, and be therefore also just very thick.Just because of this, when the braided fiber bundle, formed very big space at its cross section, this just make racket frame in mould after heat treatment, stayed the unhelpful hole that does not meet the requirements.These spaces have not only reduced the mechanical strength of racket frame, and form very big step at the fibre bundle cross section, produce the corrugated.Big thus step has just destroyed the outward appearance of racket frame.In addition, in the matrix resin of fusing, the fortifying fibre freely cross part office between reinforcing fiber bundles moves, and the matrix resin that has melted is difficult for being full of fortifying fibre.So be easy on racket frame, form wrinkle and resin hole.
If number numerical value (tex value) of the reinforcing fiber bundles that round buss uses is less, then racket frame is with regard to the problem of the reinforcing fiber bundles institute tool that number of existence numerical value (tex value) is not bigger.But the smaller reinforcing fiber bundles of use numerical value (tex value) then costs an arm and a leg, and like this, product price has also improved thereupon.
Main purpose of the present invention provides does not a kind ofly have hole, corrugated, wrinkle and resin hole, and does not improve the racket frame of product price.
Another object of the present invention provides a kind of hole corrugated that do not have, and wrinkle and resin are cheated, and does not improve the manufacture craft of the racket frame of product price.
For achieving the above object, technical scheme of the present invention is to eliminate on the sleeve cross section between the reinforcing fiber bundles or make the cross section attenuation.
The racket frame that one aspect of the present invention provides a kind of physical culture to use, this racket frame comprises: a thermoplastic resin matrix, a plurality of uniaxiallies are arranged in the reinforcing fiber bundles on the matrix, so that eliminate the cross section between the reinforcing fiber bundles and another reinforcing fiber bundles on the racket frame.
The racket frame that the present invention provides a kind of physical culture to use on the other hand, this racket frame comprises: thermoplastic resin matrix, a plurality of first reinforcing fiber bundles, at least 10 times of its width are to its thickness, a plurality of second reinforcing fiber bundles, at least 10 times of its width are to its thickness, and these two kinds of reinforcing fiber bundles are woven in together.
The manufacture craft that a kind of sport ball frame frame also on the one hand is provided of the present invention the steps include: earlier reinforcing fiber bundles and the brazing filler metal of thermoplastic resin matrix fibre bundle are made together the sleeve of different size; Then on expansible bladders, sleeve is pressed into thin-slab structure; Again thin plate is put into mould; Thin plate in the mould is heated, make temperature be equal to or higher than the fusion temperature of thermoplastic resin, in heating process, expansible bladders is filled with gases at high pressure, make the sleeve of thin plate outermost be close to the inner surface of mould; Expansible bladders high-pressure gas is made mold cools down, make formed product; Remove the gases at high pressure in the expansible bladders; From mould, take out formed product; Formed product and expansible bladders are separated.
By will more know the characteristics and the feature of racket frame of the present invention below in conjunction with the description of accompanying drawing.
Fig. 1 is the phantom view that is used for the reinforcing fiber bundles of sleeve that racket frame of the present invention is compiled;
Fig. 2 is the phantom view that is used for the sleeve of compiling of racket frame of the present invention;
Fig. 3 A-3D is a process chart of making racket frame of the present invention;
Fig. 4 A is the cutaway view of the reinforcing fiber bundles of unidirectional array in the matrix of the present invention;
Fig. 4 B is the cross one another cutaway view of reinforcing fiber bundles in the prior art matrix;
Fig. 5 is the phantom view of the another kind of reinforcing fiber bundles of the present invention;
Fig. 6 is the phantom view of the sleeve that is woven into the reinforcing fiber bundles among Fig. 5;
Fig. 7 is the cutaway view of reinforcing fiber bundles in the matrix of the present invention;
Fig. 8 is the cutaway view of the present invention's part racket frame.
Embodiment 1
Shown in Figure 1 is the reinforcing fiber bundles 1 that is used to weave racket frame sleeve of the present invention.It is circular that the cross section of reinforcing fiber bundles 1 shown in Figure 2 is generally, and can make reinforcing fiber bundles 1 with aramide fiber, glass fibre and carbon fiber.Can certainly be the producer the carbon fiber bundle " 12K " of widely used cheapness.
Fig. 2 is the sleeve of volume 2 that is used for racket frame of the present invention.Should prepare matrix fiber bundle 3, also will prepare reinforcing fiber bundles 1, reinforcing fiber bundles 1 and matrix fiber bundle 3 are woven into sleeve 2.In the present embodiment, matrix fiber bundle 3 is thermoplastic resins, for example is made of nylon, polycarbonate, polyphenylene oxide and Polyetherimide.Sleeve 2 is made into various cross sections, for example circle, rectangle, triangle etc.
For the ease of distinguishing reinforcing fiber bundles 1 and matrix fiber bundle, among Fig. 21 of reinforcing fiber bundles is gone up point.Reinforcing fiber bundles 1 is only intersected with the matrix fiber bundle, and all reinforcing fiber bundles 1 all extend in parallel and do not intersect mutually.In other words, reinforcing fiber bundles 1 unidirectional array is along spiral extension.For this reason, the problem that the racket frame of present embodiment does not exist reinforcing fiber bundles cross part branch to have, this will be described later.
For sleeve 2, the quantitative proportion of reinforcing fiber bundles 1 and matrix fiber bundle 3 has no particular limits, and it is according to the content (Vf) of fortifying fibre in the racket frame and fixed.Number numerical value of each reinforcing fiber bundles 1 and matrix fiber bundle 3 (tex value) is also according to its content (Vf) and fixed.
Sleeve 2 is made different sizes, the racket frame of sleeve 2 in order to be produced as follows of variant size.
At first referring to Fig. 3 A, sleeve 2a, 2b, 2c and the 2d of different size is pressed into thin plate mutually with one heart, forms hollow thin plate 4.In the present embodiment, the sleeve of forming hollow thin plate 4 is four, i.e. 2a-2d.But the sleeve in other racket frames of the present invention can also can be less than four more than four.In order to improve the mechanical strength of racket frame, best gland tube 2a/2b alternately, 2b/2c and 2c/2d make the orientation of the reinforcing fiber bundles 1 in orientation and another sleeve of reinforcing fiber bundles 1 of a sleeve different, form certain included angle between them.
The outer surface of bladders 5 is topped by 4 of hollow thin plates above-mentioned, and this is shown in Fig. 3 B.Bladders 5 can be that silicone tube or analog constitute.In forming process, fill gases at high pressure with in the bladders 5 and expanded.After the shaping, bladders 5 can be pulled out from hollow thin plate 4.
And then hollow thin plate 4 is put into mould 6, this is shown in Fig. 3 C, and bladders still is inserted in the hollow thin plate 4 for 5 this moments.Be placed on the appropriate location of mould 6 as the mylar 8 of compensating unit with hollow thin plate 4 with what will get ready in advance.Stretch out from mould 6 at the two ends of bladders 5, and in order to regulate hollow thin plate 4 and mylar 8, the template that forms mould 6 will cooperatively interact.
To mold heated, its temperature is equal to or higher than the fusing point of the thermoplastic resin that forms matrix fiber bundle 3 then.When the thermoplastic resin that forms matrix fiber bundle 3 was nylon, its fusing point was approximately 270 degrees centigrade.Matrix fiber bundle 3 melts in mould 6.The thermoplastic resin that has melted just is filled in the reinforcing fiber bundles 1 and goes.As previously mentioned, the reinforcing fiber bundles among each sleeve 2a/2b/2c/2d is arranged in parallel, and the thermoplastic resin that has melted has been full of between the fortifying fibre, and can not form the space.Therefore, there is not the problem that the cross part branch has between the fortifying fibre in racket frame of the present invention.
In heating process to mould 6, utilize the high-voltage power supply (not shown) in bladders 5, to fill with gases at high pressure G, gases at high pressure G expands outwardly hollow thin plate 4.Hollow thin plate 4 is forced into the inner surface of mould 6, makes the outer surface of racket frame the same smooth with the inner surface of mould 6.Therefore, by hollow thin plate 4 being pressed onto mould 6 inner surfaces, make the racket frame outer surface become smooth.
Then mould 6 is cooled to about 70 degrees centigrade, in cooling procedure, gases at high pressure continue to blow in the bladders 5.When mold temperature drops to 70 ℃, gases at high pressure are bled off from bladders 5, and the template of mould 6 is separated, like this, the racket frame 7 of shaping just can take out from mould 6.At last bladders 5 is pulled out from shaping racket frame 7, this is shown in Fig. 3 D.
In the racket frame 7 of first embodiment, separately reinforcing fiber bundles 1 unidirectional being arranged in parallel among the sleeve 2a-2d, and the unidirectional reinforcing fiber bundles that is arranged in parallel 1 can be eliminated the cross section between the reinforcing fiber bundles among the sleeve 2a-2d.Therefore be difficult for producing the space, racket frame 7 just has goodish mechanical strength.
In addition, having eliminated cross section can be so that racket frame 7 be smooth, and this is because sleeve 2a-2d is difficult to form due to the wide step.This just makes racket frame 7 that extraordinary outward appearance is arranged.That is to say that if reinforcing fiber bundles 1 resembles Fig. 4 A unidirectional array in matrix 7a, reinforcing fiber bundles 1 just can be nuzzled fully among the matrix 7a and do not had the space so, and the outer surface 7d of racket frame 7 also is smooth.Yet if reinforcing fiber bundles 1 resembles mutual intersection Fig. 4 B, some reinforcing fiber bundles just make other reinforcing fiber bundles 1 produce very big corrugateds, and this corrugated directly has influence on the outer surface 7c of racket frame.
In addition, in heating process, the fortifying fibre of unidirectional array is easy to move in the thermoplastic resin that has melted, and it is full of between the fortifying fibre thermoplastic resin that has melted.So just can not produce wrinkle and resin hole.
At last, gases at high pressure make bladders 5 force hollow thin plate 4 to be close to the inner surface of mould 6, thereby further produce smooth surface.The result makes the shaping racket frame seem very beautiful.
Because the mechanical strength of the racket frame of first embodiment has had raising, and the quantity of required reinforcing fiber bundles also lacks than prior art, and this just means that the ring frame frame before the weight ratio of racket frame is light.In addition, reduce weight and can increase additional function, for example the damping part of racket frame.
In addition, extraordinary smoothness can make the producer save coated to racket frame, and this will improve its productivity ratio and product price.
Embodiment 2
As shown in Figure 5, another kind of reinforcing fiber bundles 11 is done and is become band, and it is used in the sleeve of racket frame of the present invention.Thickness t≤0.5 of banded reinforcing fiber bundles 11 millimeter, at least 10 times of the width ω of bundle 11 are to its thickness, and the ratio of width and thickness is preferably the scope of 10-20.
With the fortifying fibre bundled tube of roller (not shown), as the reinforcing fiber bundles among Fig. 21 being squeezed into banded reinforcing fiber bundles 11 with the circular section.Carbon fiber slubbing " 12K " can be squeezed between the roller (not shown), shaping, make its hardening with the similar sizing material agent of for example low-molecular-weight nylon or epoxy resin.
Banded reinforcing fiber bundles 11a and 11b and matrix fiber bundle 12a and 12b are woven into sleeve 13 as shown in Figure 6.In order to be easy to distinguish, on belt fibre bundle 11a and 11b, put with matrix fiber bundle 12.In the present embodiment, banded reinforcing fiber bundles 11a and 11b are around the braiding of centre line C L curl, and banded reinforcing fiber bundles 11a is 90 ° with respect to the angle between the banded reinforcing fiber bundles 11b.
Matrix fiber bundle 12a and 12b do equally and become band, and its thickness is equal to or less than 0.5 micron.At least 10 times of the width of matrix fiber bundle 12 are to its thickness.The preparation method of belt fibre bundle 12a, 12b is identical with banded reinforcing fiber bundles 11a, 11b's.Ribbon base fibre bundle 12a and banded reinforcing fiber bundles 11a be braiding alternately, and alternately braiding of ribbon base fibre bundle 12b and banded reinforcing fiber bundles 11b.
Though, banded reinforcing fiber bundles 11a intersects with banded reinforcing fiber bundles 11b, but there is not the defective that is had in the prior art racket frame in the racket frame of being made by sleeve 13 yet, and this is because reinforcing fiber bundles 11 enough approaching are unlikely forming wide step and big space.
Because reinforcing fiber bundles 11a, 11b and matrix fiber bundle 12a, 12b are extremely thin, and very wide, make that the producer can bigger reinforcing fiber bundles 11a, 11b and matrix fiber bundle 12a, the 12b of the number of selecting for use numerical value (tex value), thereby reduce its quantity.Therefore under the situation that does not reduce sleeve 13 performances, make the weight saving of this sleeve.
The manufacturing process of next second embodiment is identical with first embodiment's.That is to say, will prepare other sleeves different equally, on expansible bladders, sleeve is pressed into thin plate, form the thin-slab structure identical with embodiment 1 with sleeve 11 sizes.The producer need not consider the orientation of the required banded reinforcing fiber bundles of each sleeve, and this is because banded reinforcing fiber bundles 11a intersects mutually with banded reinforcing fiber bundles 11b.
Thin plate is put in the mould heats, temperature is equal to or higher than the fusing point of thermoplastic resin.In thin plate heating process, gases at high pressure are filled to expansible bladders, bladders just is close to outmost sleeve the inner surface of mould.
Mould is cooled off under the effect of gases at high pressure then.When the temperature of the formed product in the mould drops to room temperature, remove the gases at high pressure in the expansible bladders, formed product is taken out from mould.At last expansible bladders and formed product are separated.
Fig. 7 has provided the partial structurtes of the racket frame of second embodiment.The shoulder height that banded reinforcing fiber bundles 11a and 11b have dwindled the cross section between them, matrix thermoplastic resin fibre bundle 17a has encased banded reinforcing fiber bundles 11a and 11b, and does not have the space.
The technical process of the manufacturing racket frame in embodiment 2 is: reinforcing fiber bundles 11a and 11b and matrix fiber bundle 12a and 12b are made banded structure, and be woven into thin sleeve.In heating process, thermoplastic resin freely is filled among banded reinforcing fiber bundles 11a and the 11b for this reason, and therefore, space and resin hole are difficult in the formed product and produce.This racket frame that just makes made of the present invention as smart as a new pin.
In addition, because the shoulder height of having dwindled cross section, the space is difficult in cross section and produces.So the mechanical strength of racket frame of the present invention is improved.
In addition, the shallow step of second reinforcing fiber bundles, 11 cross sections has been eliminated the corrugated on the racket frame outer surface in fact, and banded reinforcing fiber bundles 11a and 11b have improved the smoothness of racket frame outer surface.Outward appearance is very beautiful as a result, and can reduce coated required man-hour, improves productivity ratio and reduces product price.
In addition, in the racket frame of second embodiment that introduces above, matrix fiber bundle 12a and 12b do and become band.Yet matrix fiber bundle 12a and 12b not necessarily become band shape, and can be the circular section.Matrix fiber bundle 12a and 12b also can existing circular sections, and banded structure is also arranged, and this is to form matrix because final matrix fiber bundle will be melted.
Embodiment 3
As shown in Figure 8, racket frame 21 usefulness fortifying fibre thermoplastic resins of the present invention are made, and this resin includes a plurality of banded reinforcing fiber bundles 22 unidirectional array on the matrix of thermoplastic resin 23.In other words, banded reinforcing fiber bundles 22 is spirality in sleeve, and banded reinforcing fiber bundles 22 is parallel to each other, does not intersect mutually.Banded reinforcing fiber bundles 22 is identical with banded reinforcing fiber bundles 11, and at least 10 times of its width are to its thickness.
Except that the sleeve preparation, its technology is identical with first embodiment, that is to say, banded reinforcing fiber bundles 22 is identical with method and Fig. 2 that the matrix fiber bundle is woven into sleeve, and the matrix fiber bundle also is banded, can certainly be the circular section.
In sum, unidirectional array reinforcing fiber bundles 1 and banded reinforcing fiber bundles 11a/11b have eliminated space, wrinkle and resin hole effectively, and have improved the mechanical strength and the outward appearance of racket frame.Be the reinforcing fiber bundles 1 of unidirectional array and the corrugated that banded reinforcing fiber bundles 11a/11b has eliminated the racket frame outer surface effectively, make product surface smooth, improved the motion of fiber in the thermoplastic resin that has melted.Move smoothly and can be easy to make the intrafascicular thermoplastic resin that is full of equably of fortifying fibre, this just is difficult for producing wrinkle and resin hole.
Just can produce a kind of firmly refining racket frame according to technology of the present invention, this is because used the reinforcing fiber bundles 1 or the banded reinforcing fiber bundles 11a/11b of unidirectional array in the sleeve.In addition, in the heating and cooling process, expansible bladders forces the sleeve of outermost to be close to the inner surface of mould, and this makes the smooth outer surface of product.
Though indivedual embodiment of the present invention has provided accompanying drawing and explanation, concerning those skilled in the art, any modification that does not exceed the scope of the invention all is conspicuous.
Claims (13)
1, the racket frame used of a kind of physical culture, it comprises thermoplastic resin matrix (7a); A plurality of reinforcing fiber bundles (1) with in the thermoplastic resin matrix (7a) is characterized in that: described a plurality of reinforcing fiber bundles (1) unidirectional array, so that eliminate the cross section between the reinforcing fiber bundles and another reinforcing fiber bundles in the racket frame.
2,, it is characterized in that described a plurality of reinforcing fiber bundles (1) is the circular section according to the racket frame of claim 1.
3, according to the racket frame of claim 1, each at least 10 times of width (ω) that it is characterized in that described a plurality of reinforcing fiber bundles (22) are to its thickness (t).
4, the racket frame used of a kind of physical culture, it comprises the thermoplastic resin matrix; A plurality of first reinforcing fiber bundles (11a), at least 10 times of its width are to its thickness; With a plurality of second reinforcing fiber bundles (11b), at least 10 times of its width are to its thickness, and they and described a plurality of first reinforcing fiber bundles (11a) are woven together.
5,, it is characterized in that the thickness of described each first reinforcing fiber bundles (11a) and described each second reinforcing fiber bundles (11b) is equal to or less than 0.5 millimeter according to the racket frame of claim 4.
6, the manufacture craft of the racket frame used of a kind of physical culture is characterized in that it may further comprise the steps:
(1,11a/11b) (3,12a/12b) brazing filler metal becomes the sleeve (2a-2d, 13) of different size with thermoplastic resin matrix fibre bundle with reinforcing fiber bundles;
Described sleeve (2a-2d, 13) is pressed into thin plate on expansible bladders (5), forms thin-slab structure;
Described thin-slab structure is put into mould (6);
Thin-slab structure in the mould (6) is heated, temperature is equal to or higher than the fusion temperature of thermoplastic resin, in heating process,, make outmost sleeve (2d) in the thin-slab structure be close to the inner surface of mould (6) to filling with gases at high pressure (G) in the expansible bladders (5);
Expansible bladders (5) high-pressure gas (G) is made mould (6) cooling, produce formed product (7);
From expansible bladders (5), remove gases at high pressure (G);
From mould (6), take out formed product (7);
Formed product (7) and expansible bladders (5) are separated.
7,, it is characterized in that described reinforcing fiber bundles (1) unidirectional array, thereby eliminate the cross section between two reinforcing fiber bundles in the sleeve (2) at least from a plurality of sleeves according to the manufacture craft of claim 6.
8, according to the manufacture craft of claim 6, it is characterized in that described reinforcing fiber bundles (11/11a/11b) becomes banded structure, at least 10 times of its width are to its width.
9, manufacture craft according to Claim 8 is characterized in that the thickness of described reinforcing fiber bundles (11/11a/11b) is equal to or less than 0.5 millimeter.
10, according to the manufacture craft of claim 6, it is characterized in that described reinforcing fiber bundles becomes banded structure, it comprises first reinforcing fiber bundles (11a) and second reinforcing fiber bundles (11b) that is woven together with first reinforcing fiber bundles (11a) and matrix fiber bundle (12a).
11, according to the manufacture craft of claim 6, it is characterized in that described reinforcing fiber bundles (11a/11b) and matrix fiber bundle (12a/12b) make first and second banded structures respectively, at least 10 times of the width of described each first and second banded structure are to its thickness.
12,, it is characterized in that the thickness of described first and second banded structures is equal to or less than 0.5 millimeter according to the manufacture craft of claim 11.
13, manufacture craft according to claim 11, it is characterized in that described reinforcing fiber bundles has the first banded reinforcing fiber bundles (11a) and second reinforcing fiber bundles (11b), first ribbon base fibre bundle (12a) that the described matrix fiber Shu Youyu described first banded reinforcing fiber bundles (11a) replaces and the second ribbon base fibre bundle (12b) that replaces with the described second banded reinforcing fiber bundles (11b), the described first banded reinforcing fiber bundles (11a) and the first ribbon base fibre bundle (12a) and the described second banded reinforcing fiber bundles (11b) and the braiding of the second ribbon base fibre bundle (12b).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993066635U JP2543429Y2 (en) | 1993-12-14 | 1993-12-14 | Racket frame |
| JP66635/93 | 1993-12-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1111537A true CN1111537A (en) | 1995-11-15 |
Family
ID=13321557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94120054A Pending CN1111537A (en) | 1993-12-14 | 1994-12-14 | Strong and fine racket frame of fiber-reinforced thermoplastic resin and process of fabrication thereof |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2543429Y2 (en) |
| CN (1) | CN1111537A (en) |
| TW (1) | TW296985B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6106309B1 (en) * | 2016-05-10 | 2017-03-29 | 中川産業株式会社 | Reinforcing fiber structure and manufacturing method thereof |
-
1993
- 1993-12-14 JP JP1993066635U patent/JP2543429Y2/en not_active Expired - Lifetime
-
1994
- 1994-12-10 TW TW083111518A patent/TW296985B/en active
- 1994-12-14 CN CN94120054A patent/CN1111537A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2543429Y2 (en) | 1997-08-06 |
| JPH0737229U (en) | 1995-07-11 |
| TW296985B (en) | 1997-02-01 |
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| PB01 | Publication | ||
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |