505579 五、發明説明（1 ) 本發明是有關於用於製造腳踏車車輪輪轂之方法，用於 施行此方法之設備以及藉由此方法所完成的腳踏車車輪輪 轂。 申請人最近已執行各種不同的硏究和測試以製造腳踏車 零件，特別是腳踏車車輪輪轂，尤其是用於競賽腳踏車輪 幅車輪，其係使用結構纖維基材料（structure fibre based material)，典型爲碳纖維基材料（carbon fibre based material)。此種材料所能提供的優點爲，和過去所使用的 金屬材料比較起來，在所給定的相同結構特徵，此種材料 是比較輕的。因爲上述此種腳踏車車輪輪轂的典型構造， 所以由碳纖維基材料的一單一零件以製造出輪轂是很困難 的，至少在那個時候使用當時之技術。使用於現今腳踏車 車輪的輪轂會呈現出一複合圓柱形外形，其係具有一中央 固定直徑部份和兩鈴形末端部份（bell-shaped end section) ，該兩鈴形末端部份具有一較寬的直徑。此外，也希望該 輪轂厚度能從該中央部份朝向該輪轂末端而持續不斷地增 加，以便能確保在該輪轂的所有區域中所需的抵抗特徵， 特別地該等末端上，其中該等輪輻是被固定，而同時能確 保最小的重量。 上述製造具有該複合外形之管狀體之需求使得從結構纖 維材料（例如碳纖維材料）的一單一零件中製造該輪轂變成 可能。 本發明之目標是要克服此技術問題。 爲了要達成此目標，本發明是有關於一種用於製造腳踏 車車輪輪轂之方法，其特徵爲它包括有下列的階段： 505579 五 '發明説明（2 ) -設置一實質地圓柱形核心； -施加被合倂入一塑膠材料母體的結構纖維織物的許多 層，其係圍繞著該核心，以使一層疊管狀體（其具有預定 外形和厚度）圍繞墓該核心， -把該核心和形成於其上之層疊管狀體設置於一模具的 凹處中， -增加該模具之溫度至一足以使形成該核心的材料造成 膨脹之數値，其會在該模具中的該管狀體上施加一徑向壓 力而且同時也會使該塑膠材料母體（plastic material matrix)造成網狀組織（reticulation)，以及 -從該模具中且從該核心中，移除該管狀體，以便完成 由結構纖維材料的一單一零件所形成的一腳踏車輪轂。 同時，此方法的特徵爲在該核心上的織物層包括有織物 的一或更多的纏繞帶子，其係圍繞著該核心的末端和圍繞 著該核心的中央部份以及許多褶層（plies)(其係沿著該核心 的整個長度而延伸），每個褶層會以周圍的方向而部份地 覆蓋住該核心，該等摺層是被施加在該核心上的幾個面上 ，以在該軸向方向上提供抵抗至該核心。 較佳地，根據本申請人的共同專利申請案的原理，形成 該核核心的材料具有一超過9xl0_5mm/°C的熱膨脹係數和 一*超過1 〇 〇 °c的最大連_耐熱。再次，較佳地，形成該核 心的材料可以是聚四氟乙烯（PTFE)，或氟化乙烯丙烯（FEP) 或聚氯三氟化乙烯（PCTFE)或聚偏二氟乙烯（PVDF)或高密 度聚乙烯（ΡΕ-HD)。 -4- 505579 五、發明説明（3 ) 因爲PTFE此種材料的抗黏性質（此抗黏性質使從該結構 纖維模製體中分離出該核心更加容易）和它的高連續耐熱 (260°C )，因爲它良好的熱傳導性（〇.25W/m°C )以及它良好 的熱容量（特定的熱），相等於l.〇45kJ/kg°C，所以使用 PTFE是較佳的。 一般說來，此方法（其必要的階段已如上所述）可被使用 來製造出所有外形的輪轂，同時製造出與上述輪轂不同的 外形。 合倂於一塑膠材料母體中的結構纖維織物（structural fibre fabrics)早已廣爲人知且使用已有一段時日了。它們 是藉由由結構纖維（例如，碳纖維）所完成的紗線（yarn)而 被製造出來。然後，這些織物受到研光加工（calendering process)使它們結合在一起以成爲一塑膠材料母體，典型 爲一熱固型（thermosetting)塑膠材料。 如上所述，在本發明的實例的一較佳形式中，該結構纖 維爲碳纖維而且該塑膠材料母體是一熱固型塑膠材料母體 。該模具必須被帶至能成該加工的溫度，較佳地落在從 80°C至200°C的範圍中。該模具最好是被維持在此範圍的 某一溫度且持續之時間是落在從3分鐘至3小時。 在根據本發明方法是被施行以製造出具有上述複合外形 的輪轂的情形下時，則此方法的特徵爲該核心會呈現出一 圓柱形中央部份和兩較寬直徑末端部份且是由兩分離，徑 向地連續元件所組成，其係具有一與該核心的軸成垂直的 接觸平面，以在從該模具中取出之後使該核心能從該管狀體 中分離出來。如上所述，該管狀體最好是預先形成以便呈 505579 五、發明説明（4 ) 現出一圓柱形中央部份和兩放大末端部份，其係具有從該 中央部份朝向該等末端而持續不斷地增加厚度。 在本發明的實例的一較佳實例中，形成該核心的此兩元 件合倂有兩末端環凸緣，其係限制且包含預先形成在該核 心上的該管狀體的該等末端。 最後，根據另一槪念，本發明也是有關於根據本發明所 完成的一腳踏車車輪輪轂。根據本發明輪轂的特徵爲它是 由合倂入一塑膠材料母體的結構纖維基材料的一單一管狀 體所製成，其係具有一圓柱形中央部份和兩放大末端部份 。較佳地，根據本發明輪轂會呈現出一從該中央部份朝向 該等末端而持續不斷增加的厚度。 以下將隨著附圖藉由以下的仔細描述來詳加說明本發明 ，其係爲非限制實例，其中， -第1圖顯示出該核心的立體圖，其係屬於使用於根據 本發明方法中之設備， -第2圖例舉出形成在第1圖中該核心的兩元件之立體 圖，其係在一相互分開的狀況之中， -第3至15圖是立體圖，其係例舉出形成在該核心（如 第1圖所示）上的該碳纖維織物的層疊方法的各種不同階 段， -第16圖是一立體圖，其係例舉出在第1圖中的該核心 是完全地覆蓋有碳纖維織物的一層’ -第1 7圖是例舉於第1 6圖中該總成的局部橫剖面圖’ 其係具有形成該核心的兩元件且在其上的該預先形成管狀 505579 五、發明説明（5 ) 層疊體，以及 -第1 8圖是該模具的橫剖面圖，其係用於根據本發明的 方法中。 參考第1圖，數字1指出一由兩分離元件3，4所組成 的圓柱形核心。在所顯示的實例中，每個此兩元件3，4 是由PTFE的一單一件所製成。在第1圖中所例舉的該閉 合狀態中，此兩元件3，4會形成一實質圓柱形核心，其 係具有呈現出一固定直徑的中央部份2和具有一放大直徑 的兩鈴形末端部份5，6，其以兩環凸緣7，8而終止。 參考從第3至第16圖，該核心1是外部地塗覆有結構 纖維基織物（典型爲碳基織物）的層，其係合倂入一熱固型 塑膠材料母體。該層疊製程的各種不同階段是被例舉在從 第3到第15圖中。 參考第3圖，在一第一階段中，碳纖維織物的一帶子 50是被纏繞在該核心1的鈴形末端5上（例如圍繞在該核 心上有5圈之多）。此後，在該核心1的末端6上的織物 的帶子5 1上施行相同的作業。第4圖例舉出具有纏繞物 50，51(其係在上述階段的尾端中完成）的核心1。 一第一件，或褶層52，一第二褶層53(第5圖），一第 四褶層54和一第五褶層55(第6圖）然後被施加至該體（其 係在四個後續的階段中而被完成）。各等褶層52，53，54 ，55會延伸至該核心的整個軸向長度，而各等褶層會以周 圍的方向而部份地覆蓋住該核心。如第5，6圖中所顯示 的，它們是被應用在四個不同的面上，該四個不同的面是 -7- 505579 五、發明説明（6 ) 以相互爲90°角度而被設置。首先，兩相互面對的褶層 52，53是被使用，之後，另兩相互面對且以90°而被定方 位的褶層54，55也被使用。第7圖例舉出在第5，6圖中 所例舉出之該等階段的尾端而完成的結構。因爲該等摺層 是被連接至在該核心上的末端上的該等層，因而會提供軸 向抵抗至該層疊層，所以上述該等褶層的功能是十分重要 的。 在上述階段的尾晶中，兩帶子56，57(第8圖）於後續的 階段中是被纏繞在該等被使用的層上。以相對應於該核心 的該等末端以便能完成如第9圖所顯示的結構。在此點上 ，兩額外帶子58，59額外地是被纏繞在該核心的末端上（ 第10圖），之後，兩相互面對的摺層60，61 (其外形如第 11圖所示）是被使用。此等褶層60，61明顯地是被使用於 後續的階段中以完成如第12圖中所示的結構，其中該等褶 層會連接該等末端層以額外地增加該層疊體的軸向抵抗。 使用兩額外的帶子62，63來完成本方法，帶子62，63 (其第13圖所示）在後續的階段中是被纏繞在該核心末端上 以便完成如第14所示的結構，之後，一最後帶子64(其外 形是如第15圖所示）是被使用且被纏繞在該核心的中央部 份上，以便最後地完成如第16圖所示的結構。一旦完成 本方法後，一管形體9是被形成在該核心（第16圖）上，一 中央固定部份10，以及兩較大直徑的鈴形末端11，12。此 外，如第17圖所顯示的，該預先形成管狀體9的厚度會從 該中央部份10朝向該等末端而持續不斷地增加。最後，該核 505579 五、發明説明（7 ) 心1的兩環末端凸緣78會軸向地包含該預先形成管狀體9 的該等末端。 由核心1所組成的總成（assembly)(其係包括有兩元件 3,4和有預先形成管狀體9纏繞於其上）是被設置在一模型 設備14的一圓柱形凹處13中（參考第18圖）。該圓柱形凹 處13是藉由一上半模具15和一下半模具16而被形成，505579 V. Description of the invention (1) The present invention relates to a method for manufacturing a bicycle wheel hub, a device for performing the method, and a bicycle wheel hub completed by this method. Applicants have recently performed various investigations and tests to manufacture bicycle parts, especially bicycle wheel hubs, and especially for racing bicycle spoke wheels, which use a structure fiber based material, typically carbon fiber Carbon fiber based material. This kind of material can provide the advantage that compared with the metal materials used in the past, given the same structural characteristics, this kind of material is relatively light. Because of the typical construction of a bicycle wheel hub as described above, it is difficult to make a hub from a single piece of carbon fiber-based material, at least at that time using current technology. The hubs used in today's bicycle wheels will exhibit a composite cylindrical shape with a central fixed diameter portion and two bell-shaped end sections. The two bell-shaped end sections have a comparative Wide diameter. In addition, it is also desirable that the thickness of the hub can be continuously increased from the central portion toward the end of the hub, so as to ensure the required resistance characteristics in all areas of the hub, especially on the ends, where the spokes It is fixed while ensuring minimum weight. The above-mentioned need for manufacturing a tubular body having the composite shape makes it possible to manufacture the hub from a single part of a structural fiber material such as a carbon fiber material. The object of the present invention is to overcome this technical problem. To achieve this, the present invention relates to a method for manufacturing a wheel hub of a bicycle, which is characterized in that it comprises the following stages: 505579 Five 'invention description (2)-providing a substantially cylindrical core;-applying Many layers of structural fiber fabric incorporated into a matrix of plastic material, which surround the core so that a laminated tubular body (which has a predetermined shape and thickness) surrounds the core of the tomb,-forming the core and forming thereon The upper laminated tubular body is placed in a recess of a mold,-increasing the temperature of the mold to a number sufficient to cause the material forming the core to expand, which will apply a radial direction to the tubular body in the mold The pressure also causes the plastic material matrix to cause a reticulation, and the tubular body is removed from the mold and from the core in order to complete a single structure fiber material A wheel hub formed by parts. At the same time, the method is characterized in that the fabric layer on the core includes one or more wrapping tapes of fabric, which are tied around the end of the core and the central part surrounding the core and a number of plies (Which extends along the entire length of the core), each pleated layer will partially cover the core in the surrounding direction, and the folds are applied on several faces of the core to Provides resistance to the core in the axial direction. Preferably, according to the principle of the applicant's common patent application, the material forming the core core has a thermal expansion coefficient of more than 9 × 10-5 mm / ° C and a maximum connection-temperature resistance of more than 1000 ° c. Again, preferably, the material forming the core may be polytetrafluoroethylene (PTFE), or fluorinated ethylene propylene (FEP) or polyvinyl chloride trifluoride (PCTFE) or polyvinylidene fluoride (PVDF) or high Density polyethylene (PE-HD). -4- 505579 V. Description of the invention (3) Because of the anti-stick property of PTFE (this anti-stick property makes it easier to separate the core from the structural fiber molded body) and its high continuous heat resistance (260 ° C), because of its good thermal conductivity (0.25 W / m ° C) and its good thermal capacity (specific heat), which is equal to 1.045 kJ / kg ° C, it is preferable to use PTFE. In general, this method (the necessary stages of which have already been described above) can be used to make wheels of all shapes, and at the same time to make shapes different from those of the above-mentioned wheels. Structural fibre fabrics incorporated into a matrix of plastic material have been well known and used for some time. They are manufactured from yarns made from structural fibers (for example, carbon fibers). These fabrics are then subjected to a calendering process to bring them together to form a matrix of plastic material, typically a thermosetting plastic material. As described above, in a preferred form of the embodiment of the present invention, the structural fiber is a carbon fiber and the plastic material precursor is a thermosetting plastic material precursor. The mold must be brought to a temperature at which the processing can take place, preferably in a range from 80 ° C to 200 ° C. The mold is preferably maintained at a certain temperature in this range for a duration ranging from 3 minutes to 3 hours. In the case where the method according to the present invention is carried out to produce a wheel hub with the above-mentioned composite shape, the method is characterized in that the core presents a cylindrical central portion and two wider diameter end portions and is composed of Composed of two separate, radially continuous elements, which have a contact plane perpendicular to the axis of the core to enable the core to be separated from the tubular body after being removed from the mold. As mentioned above, the tubular body is preferably formed in advance so as to be 555579. 5. Description of the Invention (4) A cylindrical central portion and two enlarged end portions are shown, which have a direction from the central portion toward the ends. Continuously increase the thickness. In a preferred embodiment of the present invention, the two elements forming the core are combined with two end ring flanges which are restricted and include the ends of the tubular body formed in advance on the core. Finally, according to another idea, the present invention also relates to a bicycle wheel hub completed according to the present invention. The wheel hub according to the present invention is characterized in that it is made of a single tubular body of structural fiber-based material incorporated into a plastic material matrix, which has a cylindrical central portion and two enlarged end portions. Preferably, the hub according to the present invention will exhibit a continuously increasing thickness from the central portion toward the ends. The present invention will be described in detail below with the accompanying drawings through the following detailed description, which is a non-limiting example, of which-Figure 1 shows a perspective view of the core, which belongs to the method used in the method according to the present invention. Equipment,-Figure 2 illustrates the perspective view of the two elements formed in the core in Figure 1, which are in a state separated from each other,-Figures 3 to 15 are perspective views, and the examples are formed in the Various stages of the method of laminating the carbon fiber fabric on the core (as shown in Fig. 1),-Fig. 16 is a perspective view, which exemplifies that the core in Fig. 1 is completely covered with carbon fiber fabric The first layer '-Figure 17 is a partial cross-sectional view of the assembly illustrated in Figure 16', which is the pre-formed tube 505579 with two elements forming the core and on it. 5. Description of the invention ( 5) The laminated body, and FIG. 18 is a cross-sectional view of the mold, which is used in the method according to the present invention. Referring to Fig. 1, the numeral 1 indicates a cylindrical core composed of two separate elements 3,4. In the example shown, each of these two elements 3, 4 is made from a single piece of PTFE. In the closed state exemplified in Figure 1, the two elements 3, 4 will form a substantially cylindrical core with a central portion 2 exhibiting a fixed diameter and a two bell shape with an enlarged diameter. End sections 5,6 which terminate with two ring flanges 7,8. Referring to Figures 3 to 16, the core 1 is a layer that is externally coated with a structural fiber-based fabric (typically a carbon-based fabric), which is incorporated into a matrix of a thermosetting plastic material. The various stages of the lamination process are exemplified in Figures 3 to 15. Referring to FIG. 3, in a first stage, a band 50 of a carbon fiber fabric is wound around a bell-shaped end 5 of the core 1 (for example, there are 5 turns around the core). Thereafter, the same operation is performed on the fabric tape 5 1 on the end 6 of the core 1. Figure 4 illustrates the core 1 with the entanglements 50, 51 (which are completed in the tail end of the above stage). A first piece, or pleated layer 52, a second pleated layer 53 (Figure 5), a fourth pleated layer 54 and a fifth pleated layer 55 (Figure 6) are then applied to the body (which is attached to Completed in four subsequent stages). Each pleated layer 52,53,54,55 will extend to the entire axial length of the core, and each pleated layer will partially cover the core in a peripheral direction. As shown in Figures 5 and 6, they are applied to four different faces, which are -7-505579. 5. Description of the invention (6) are set at 90 ° angles to each other . First, two pleats 52, 53 facing each other are used, and then two other pleats 54, 55 facing each other and positioned at 90 ° are also used. Fig. 7 illustrates a structure completed at the tail end of the stages exemplified in Figs. The functions of these pleats are important because the folds are the layers connected to the ends on the core and therefore provide axial resistance to the layer. In the epitaxy of the above stage, the two tapes 56, 57 (Fig. 8) are wound on the used layers in the subsequent stages. The ends corresponding to the core are completed so that the structure as shown in FIG. 9 can be completed. At this point, the two additional straps 58, 59 are additionally wound around the end of the core (Figure 10), and then the two facing folds 60, 61 (the shape of which is shown in Figure 11) Is used. These pleats 60, 61 are obviously used in subsequent stages to complete the structure as shown in Figure 12, where the pleats will connect the end layers to additionally increase the axial direction of the laminate resistance. Two additional straps 62, 63 are used to complete the method. The straps 62, 63 (shown in Figure 13) are wound on the core end in a subsequent stage to complete the structure shown in Figure 14, after which, A final strap 64 (the shape of which is shown in Fig. 15) is used and wound around the central portion of the core to finally complete the structure shown in Fig. 16. Once the method is completed, a tubular body 9 is formed on the core (Fig. 16), a central fixing portion 10, and two larger-diameter bell-shaped ends 11,12. In addition, as shown in Fig. 17, the thickness of the pre-formed tubular body 9 is continuously increased from the central portion 10 toward the ends. Finally, the core 505579 5. Invention description (7) The two ring end flanges 78 of the core 1 will axially contain the ends of the pre-formed tubular body 9. An assembly consisting of a core 1 (which includes two elements 3, 4 and a pre-formed tubular body 9 wound thereon) is provided in a cylindrical recess 13 of a model device 14 ( (Refer to Figure 18). The cylindrical recess 13 is formed by an upper mold half 15 and a lower mold half 16,
其會呈現出一相對應於該輪轂（待完成）的外表面之外形的 外形，即，實質地相對應於該預先形成管狀體9(如第16 圖所示）的外表面。該凹處13的該等末端是藉由兩蓋子17 ，18(其係藉由螺絲19而被固定至此兩半模具15，16的 兩末端凸緣）而被閉合。各兩蓋子17，18都合倂有一中央 圓柱形外殼20，其中有兩螺旋形彈簧21是軸向地被設置 在各管狀外殼20的底牆壁20a和該核心1的各末端表面 之間。此兩彈簧21會彈性地壓制住該核心1的兩元件3， 4使此兩元件3，4互相靠緊，以使它們保持接觸以相對應 於它們的接觸平面22，其係與該核心1的軸23成垂直。 在設置該總成（其係由核心1和被纏繞在該核心上的預 先形成管狀體所組成）於該模具中之後，該模具是被帶至 足以使該熱固型塑膠材料母體（其係屬於該管狀體9)造成 網狀組織的溫度，例如至落在從80°C至200°C範圍之中。 該溫度增加是被維持且最好持續從15分鐘至45分鐘（最 好是大約20分鐘）的範圍中。以此方式，此熱固母體會造 成網狀組織，而形成該核心1的此兩元件3，4的PTFE則 會膨脹。因爲凸緣7，8是藉由此兩彈簧而被壓制住且緊 -9- 五、發明説明（8 ) 靠在該預先形成管狀體9的該等末端上，所以此膨脹主要 地會向外徑向地壓制住。因此，一徑向壓力是向外地緊靠 在該管狀體9(其係因而被推壓且緊靠在該圓柱形凹處13 的牆壁上）而被施行。以此方式，儘管在此文件中所例舉 出的該體是複合外形（其係具有鈴形末端和一從中央至該 等末端而持續不斷增加的厚度），但是仍還是能在該預先 形成管狀體9的所有部份上施加一均勻的壓力。自然而然 ，在此階段期間中，此等彈簧21會使核心1的兩元件3， 4稍微地相互分開，隨後有藉由PTFE之核心而施加的力 使其緊靠在該環凸緣7, 8上。 此模具是被打開且該總成（其係包括有核心1和被設置 於其上的該體9)在該網狀組織階段的尾端中而被取出。在 此點上，形成該核心1的元件3，4是以相反方向從該體9 而被取出，因而完成形成根據本發明之車輪輪轂。儘管有 上述的複合幾何外形，但是所完成的輪轂會呈現出特別地 由結構纖維材料所製成，典型爲碳纖維材料，且是由一單 一零件所製成。自然而然，本產品可受加額外的機械加工 (例如在用於嚙合輪輻的此而鈴形末端中鑽孔以形成一組 徑向孔）其會使此零件被使用爲一腳踏車車輪輪轂。 自然而然，可以對在文中所述的本發明之結構和實例的 形式，做出各種不同的改變，其係包括於本發明之特徵槪 念之內容中，如以下申請專利範圍中所定義的。 例如，儘管本發明的描述和其申請專利範圍指出的是一 腳踏車車輪輪轂，但是根據本發明方法明顯地可被應用來 -10- 505579 五、發明説明（9 ) 製造出一具有類似外形，特別是其它腳踏車零件的其它零 件。因此，這些應用及其導出的產品也落在本發明的範圍 中。 符號之說明 1 核心 2 部份 3 元件 4 元件 5 部份/末端 6 部份 7 凸緣 8 凸緣 9 體 10 部份 11 末端 12 末端 13 凹處 14 設備 15 模具 16 模具 17 蓋子 18 蓋子 19 螺絲 20 外殼It will assume an outer shape corresponding to the outer surface of the hub (to be completed), that is, it substantially corresponds to the outer surface of the pre-formed tubular body 9 (shown in Fig. 16). The ends of the recess 13 are closed by two covers 17, 18 (which are fixed to the two end flanges of the two mold halves 15, 16 by screws 19). Each of the two covers 17, 18 is combined with a central cylindrical case 20, in which two helical springs 21 are arranged axially between the bottom wall 20a of each tubular case 20 and the end surfaces of the core 1. The two springs 21 elastically press the two elements 3, 4 of the core 1 so that the two elements 3, 4 are in close contact with each other so that they remain in contact to correspond to their contact plane 22, which is connected to the core 1 The shaft 23 becomes vertical. After the assembly (which consists of the core 1 and a pre-formed tubular body wound around the core) is set in the mold, the mold is brought to a position sufficient for the thermosetting plastic material mother body (the system The temperature belonging to the tubular body 9) causes the reticular structure to fall, for example, in a range from 80 ° C to 200 ° C. This temperature increase is maintained and preferably lasts in the range from 15 minutes to 45 minutes (preferably about 20 minutes). In this way, the thermosetting matrix will form a mesh structure, while the two elements 3, 4 forming the core 1 will swell. Since the flanges 7 and 8 are held down and tight by the two springs. 5. The invention description (8) rests on the ends of the pre-formed tubular body 9, so this expansion will be mainly outward. Suppress radially. Therefore, a radial pressure is exerted outwardly against the tubular body 9 (which is thus pushed and against the wall of the cylindrical recess 13). In this way, although the body exemplified in this document is a composite shape (which has a bell-shaped end and a continuously increasing thickness from the center to the ends), it can still be formed in this A uniform pressure is applied to all parts of the tubular body 9. Naturally, during this phase, these springs 21 will slightly separate the two elements 3, 4 of the core 1 from each other, and then there will be a force applied by the core of the PTFE to abut the ring flange 7, 8 on. The mold is opened and the assembly (which includes the core 1 and the body 9 disposed thereon) is taken out in the tail end of the mesh structure stage. In this regard, the elements 3, 4 forming the core 1 are taken out of the body 9 in opposite directions, thus completing the formation of the wheel hub according to the invention. Despite the composite geometry described above, the completed hub will appear to be made especially of a structural fiber material, typically a carbon fiber material, and made of a single piece. Naturally, this product can be subjected to additional machining (such as drilling a hole in the bell-shaped end for engaging the spokes to form a set of radial holes) which will cause this part to be used as a bicycle wheel hub. Naturally, various changes can be made to the structure and examples of the invention described in the text, which are included in the features of the invention, as defined in the scope of the following patent applications. For example, although the description of the present invention and the scope of its patent application indicate a bicycle wheel hub, the method according to the present invention can obviously be applied to -10- 505579 V. Description of the invention (9) Manufacture a similar shape, especially Other parts of other bicycle parts. Therefore, these applications and their derived products also fall within the scope of the present invention. Explanation of Symbols 1 Core 2 Part 3 Element 4 Element 5 Part / End 6 Part 7 Flange 8 Flange 9 Body 10 Part 11 End 12 End 13 Recess 14 Device 15 Mold 16 Mold 17 Cover 18 Cover 19 Screw 20 housing
-11- 505579 五、發明説明（1G ) 20a 牆壁 21 彈簧 22 接觸平面 23 軸 50 纏繞物 51 纏繞物 52 褶層 53 褶層 54 褶層 55 褶層 56 帶子 57 帶子 58 帶子 59 帶子 60 摺層 61 褶層 62 帶子 63 帶子 64 帶子 -12--11- 505579 V. Description of the invention (1G) 20a Wall 21 Spring 22 Contact plane 23 Shaft 50 Winding 51 Winding 52 Winding 53 Winding 54 Winding 55 Winding 56 Winding 57 Winding 58 Winding 59 Winding 59 Winding 60 Folding 61 Pleated 62 Tape 63 Tape 64 Tape-12-