506917 五、發明説明（1 ) 本發明是有關於用於製造腳踏車輪轂（hub)之方法， 用於實施此方法之設備，以及藉由此方法而完成之輪 轂。 申請人近來實施各種不同的硏究和測驗以藉由使用 結構纖維基材料（structural fibre based material),特別 是碳纖維基材料來製造腳踏車零件，特別是腳踏車輪轂， 特別是有幅輪競賽腳踏車。相對於以前所使用的金屬 材料（其具有相同的結構特徵），此種型式材料所提供的 優點是重量較輕。因爲上述此種型式的腳踏車輪轂的 典型結構，所以以當時可利用的技術以碳纖維基材料的 一單一零件來製造一輪轂是很困難的。在現代腳踏車 中所使用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具有較寬之直徑的兩鈴形末端 部份（bell-shaped end section)。此外，也希望該輪轂厚 度能從該中央部份朝著該等輪轂末端而持續不斷地增 加以確保在該輪轂的所有區域中所需的抵抗特性 (resistance characteristics)，特別是在末端上，其中輪輻 是被固定在該末端上，而同時能確保最小的重量。以上 描述出所需的具有複合外形的管體（tubular body)，其 係能從一結構纖維材料的一單一零件中，例如碳纖維材 料而製造出此輪轂。 本發明的目標是要來克服此技術問題。 -設置一實質地圓柱形金屬材料核心，其係被覆蓋有一由 彈性材料（elastomeric material)所製成的可變形鞘（sheath)， 506917 五、發明説明（2 ) - 使用被合倂於一塑膠材料母體（其係圍繞著該核心 和該個別鞘）的結構纖維織物（structural fibre fabric) 的許多層以便形成一層疊（layered)管體，其係具有預先 決定外形和厚度而且圍繞著該核心和個別鞘， -把該核心和個別鞘（其係具有形成於其上的層疊管 體）放置於一模具的凹處（cavity)中。 -增加該模具之溫度至足夠地造成該塑膠材料母體 之網狀組織（reticulation)的一數値且同時造成該材料 (其係形成該鞘）之膨脹，其會在該模具內的該管體上施 加一徑向壓力，以及 -從該模具中和從該核心中，移除該管體以便獲得 一由結構纖維材料所形成的單一零件之腳踏車輪轂。 較佳地，前述鞘的彈性材料具有一超過15xl(T5im/°C 之熱膨脹係數且具有一超過100 °C的最大連續耐熱溫 度。 例如，該鞘之材料可以是一矽橡膠（silicon rubber)成 一合成橡膠（synthetic rubber),市場有的此類產品，如 Airtech International Inc. ?Humtington Beach， California，USA 的商標 AIRCAST 3700。此材料是因 爲它的高熱膨脹係數（90x1 (Γ5 on /°C )以及它的高連續 耐熱性（232t )，因爲它良好的熱導性，（2.59W/°C )以及 因爲它良好的最大張力應力（6 80%)，所以此材料爲較佳 的。在它從該模具中被取出且該核心是被移除之後，上 述良好的性質使該鞘從該成品的內表面中之移除更加 506917 五、發明説明（3 ) 便利。506917 V. Description of the invention (1) The present invention relates to a method for manufacturing a hub of a pedal wheel, a device for implementing the method, and a hub completed by the method. Applicants have recently conducted various investigations and tests to manufacture bicycle parts, especially bicycle wheel hubs, and especially wheeled bicycles, by using structural fiber based materials, especially carbon fiber based materials. This type of material offers the advantage of being lighter than previously used metallic materials, which have the same structural characteristics. Because of the typical structure of a pedal wheel hub of the type described above, it is difficult to manufacture a hub from a single piece of carbon fiber-based material using techniques available at the time. The wheel hub used in modern bicycles will have a compound cylindrical shape with a central fixed diameter portion and a two bell-shaped end section with a wider diameter. In addition, it is also desirable that the thickness of the hub can be continuously increased from the central portion toward the ends of the hubs to ensure the required resistance characteristics in all regions of the hub, especially on the ends, where The spokes are fixed to this end while ensuring minimal weight. The above describes the required tubular body with a composite shape, which can be used 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. -A core of a substantially cylindrical metal material is provided, which is covered with a deformable sheath made of an elastic material (506917) V. Description of the invention (2)-Use is combined into a plastic A plurality of layers of a structural fiber fabric of a matrix of materials that surrounds the core and the individual sheaths to form a layered tube having a predetermined shape and thickness and surrounding the core and Individual sheath-Place the core and individual sheath (which has a stacked tube body formed on it) in a cavity of a mold. -Increasing the temperature of the mold to sufficiently cause a few 値 of the reticulation of the plastic material mother body and at the same time cause the material (which forms the sheath) to expand, which will be in the tube body in the mold A radial pressure is applied and the tube is removed from the mold and from the core in order to obtain a single-part bicycle wheel hub made of a structural fiber material. Preferably, the elastic material of the sheath has a thermal expansion coefficient of more than 15 × l (T5im / ° C) and a maximum continuous heat-resistant temperature of more than 100 ° C. For example, the material of the sheath may be a silicon rubber into a Synthetic rubber (synthetic rubber), such products available in the market, such as Airtech International Inc.? Humtington Beach, California, USA trademark AIRCAST 3700. This material is due to its high thermal expansion coefficient (90x1 (Γ5 on / ° C) and Its high continuous heat resistance (232t), because of its good thermal conductivity, (2.59W / ° C) and because of its good maximum tensile stress (6 80%), this material is better. After the mold is taken out and the core is removed, the above-mentioned good properties make the removal of the sheath from the inner surface of the finished product more 506917. 5. Description of the invention (3) Convenient.
此方法（重要的階段已如上所述）通常可被使用在製 造出具有所有外形的輪轂，同時也可不同於以上所描述 的。此方法的一重要特徵是在於設置具有前述彈性材 料鞘（其係由高的熱膨脹彈性材料所製成）的核心。此 材料會呈現出在相對低的溫度下而受到高的熱膨脹處 理之特徵。在此溫度的狀況下，在該塑膠材料中的結構 纖維織物是合倂有網狀組織。 被合倂在一塑膠材料母體的各結構纖維織物早已爲 習知且被使用已有一段時閭。它們是由從結構纖維（例 如碳纖維）中所獲得的紗線（yarn)所製成。這些織物然 後受到一砑光加工（calendaring process)以使它們聯結 至一塑膠材料母體，典型地爲一熱固型（thermosetting) 塑膠材料。This method (the important stages have been described above) can usually be used to make a wheel with all shapes, but it can also be different from the one described above. An important feature of this method is the placement of a core with the aforementioned elastic material sheath, which is made of a highly thermally expandable elastic material. This material will be characterized by a high thermal expansion treatment at relatively low temperatures. At this temperature, the structural fiber fabric in the plastic material is meshed with a mesh structure. Structural fiber fabrics that have been combined into a matrix of plastic material have been known for quite some time and have been used for some time. They are made of yarns obtained from structural fibers, such as carbon fibers. These fabrics are then subjected to a calendaring process to attach them to a matrix of plastic material, typically a thermosetting plastic material.
根據本發明之方法，此種型式之許多織物層會纏繞著 該核心和該個別鞘，其外形是相對應於將要完成的該輪 轂的外形。以此方式，當該模具是被加熱至使該層疊管 體（其係纒繞著該核心和鞘）的熱固型母體形成網狀組 織時，則形成該鞘的該材料會膨脹因而在該管體的面上 施加一徑向壓力，其係用來以獲得一具有必須結構特徵 的產品。此熱膨脹鞘的主要優點爲儘管該預先成形管 體的可能複合構造（如本文開始所描述的），即具有兩擴 大鈴形末端部份和一持續不斷增加之厚度5但是還是可以 均勻地施加此壓力，另外的優點則歸功於它的彈性，同時 506917 五、發明説明（4 ) 當彈性鞘呈現出複合外形時，則該彈性鞘能輕易地從該 成品中而被移除。 如上所述，在本發明的實例的較佳形式中，該結構纖 維是碳纖維，而且該塑膠材料母體是一熱固形塑膠材 料母體。該溫度（模具必須被加熱至此溫度）是較佳爲 在8 0°C至2 0(TC之範圍內。此模具最好是被維持在此 範圍中的某一溫度且持續從30分鐘至3小時的範圍 中〇 在實施根據本發明的方法以製造出具有上述複合外 形的情況下時，本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的直徑而且是由兩分離的，軸向連 續元件（其係具有與該核心的軸成垂直的一接觸平面） 所組成以便在從該模具中取出之後，能從該管體中分離 出該核心。如上所述，該核心鞘在移除該核心之後仍然 在該管體內中。歸功於其彈性，該鞘可輕易地被移除。 如上所述，該管體最好是預先形成以便呈現出一圓柱 形中央部份和兩擴大末端部份（其係具有朝向其末端而 持續不斷地增加之厚度）。 在本發明的實例的較佳形式中，形成該核心的兩元件 合倂有兩末端環凸緣，其係用來限制且包含有該管體 (在該核心上預先成形）的末端。 最後，根據本發明之其它觀點，本發明同時也有關於 藉由本發明的方法而獲得的腳踏車輪轂。根據本發明 之輪轂的特徵是在它是由單一管體（其係由被合倂於一 506917 五、發明説明（5 ) 塑膠材料母體中的結構纖維基材料所製成）所組成。該 管體具有一圓柱形中央部份和兩擴大末端部份。較佳 地，根攄本發明之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之厚度。 圖式簡單說明 以下將要藉由附圖（爲非限制實例）來仔細地說明本 發明，其中： -第1圖大槪地指出該核心的立體圖，其係屬於被使 用於根據本發明方法中的設備， -第2圖例舉出兩元件（在相互分離的狀況下）的立 體圖，其係形成在第1圖中的核心， -第3圖例舉出在第1圖中的核心，其係外部地覆蓋 有結構纖維基織物的許多層，根據本發明之方法， -第4圖是彈性材料的鞘的立體圖，其係塗覆在第1 圖中的核心， -第5圖是被例舉在第3園中的總成（assembly)的 部份橫剖面圖，其具有形成該核心的兩元件，覆蓋此元 件的該鞘以及在此上的預先成形之管層疊體，以及 -第6圖是一用於根據本發明的方法的模具的橫剖 面圖。 參考第1圖，號碼1指出一由兩分離元件3,4所組成 的圖柱形核心。每個此兩元件3，4是由金屬材料例如 鋼所製成。在第1圖中所例舉的閉合狀態中，此兩元件 3，4會形成一實質上圓柱形核心，其係具有一中央部份 -7- 506917 五、發明説明（6 ) 2 (其呈現出一固定直徑）和兩鈴形端部份5,6(其係具有 一擴大直徑，結束於環凸緣7,8)。 參考第3,4圖，核心1是外部地被覆蓋有由一高熱膨 脹彈性材料所製成的一鞘24(參考第4,5圖）。較佳地， 形成前述鞘之該彈性材料具有超過15xl(T5腿/°C之熱 膨脹係數且具有超過100 °C之最大連續抗熱溫度。 例如，形成該核心鞘的該材料可以是合成橡膠市場有 的此類產品，如 Airtech International Inc.，Huntington Beach，California，USA 的商標 AIRCAST 3700。此材料 是因爲它的高熱膨脹係數（15x1 (Γ5醒/°C )以及它的高 連續耐熱性（232t )，因爲它良好的熱導性（2.59W/m°C ) 以及它良好的最大張力應力（680% )5所以此材料爲較佳 的。在它從模具中被取出且該核心是被移除之後，上述 良好的性質使該鞘從該成品的內表面中之移除更加便 利。 根據該核心[(第4圖)其係具有中央圓柱形部份和兩 鈴形末端部份]的結構，該鞘是預先形成的且較佳地按 規格尺寸成形以便藉由使它輕微地伸長（stretching)而 被塗覆在該核心上使得該鞘能藉由它的彈性回復 (return)之效果而被黏附在該核心。 該核心和個別的鞘是因此而被塗覆有結構纖維基材 料（典型地爲碳纖維）的片的層，其合倂於一熱固型塑膠 材料母體中。較佳地，根據本申請人共同申請的專利案 之原理，在該核心和鞘上的織物層包括有一或更多的画 506917 五、發明説明（7 ) 繞在個較大直徑末端和該核心的中央部份上的織物的 帶子（strips)的纏繞物以及許多的摺層（plies)(其係延伸 在該核心的整個長度上），每個摺層都會以圓周方向而 部份地覆蓋住該核心，該等厚度是被應用於該核心的數 個面上，以在該徑向方向上提供抵抗力至該結構。如第 4圖所示，織物的片的數層是纏繞在該核心1的整個外 面上以便形成一預先形成的管體9,其也呈現一中央固 定部份1 0和較大直徑的兩鈴形末端1 1，1 2。此外，該預 先成形管體9的厚度會以該末端方向而從中央部份持 續不斷地增加。最後，該核心1的兩環末端凸緣7,8軸 向地包含有該預先成形管體9的末端。 該總成（其係由核心1所組成，包括有兩元件3,4,有 鞘24和預先形成管體9纒繞著該總成）是被定位在一 模具設備14(其係藉由一上半模具15和一下半模具16 而形成）的圓柱形凹處1 3中，其呈現出一相對應於將要 完成的該輪轂之外表面的外形之外形，即，實質地相對 應於預先形成管體9(如第4圓所示的）外部表面。該凹 處1 3的末端是藉由蓋子1 7,1 8(其係藉由螺絲1 9而被 鎖緊至該等半模具15，16的該兩末端凸緣）而被閉合 。每個此兩蓋子17，18合倂有一中央圓柱形外殻20,其 中設置有一個別的螺旋形彈簧21。每個此兩螺旋形彈 簧21是軸向地被設置在該別的管形外殼20的底牆 2 0a和該核心1的個別端表面之間。此兩彈簧21會彈 性地壓住該核心1的兩元件3，4以使此兩元件3，4相 »9- 506917 五、發明説明（8 ) 互 緊 靠 者 使 得 這些元件會相對應於它們的接觸平面 2 2(其係與該核心1的軸23成垂直）而保持接觸。 在 把 該 總 成 (其係由核心和纒繞在該核心上的預先形 成 管 體 所 組 成 )放置在該模具中之後，該模具是被帶至 足 以 坦 成 熱 固 型塑膠材料母體（其係屬於管體9)的網狀 組 織 的 溫 度 ，例如包括從8 0 °C至2 0 0 °C內的溫度。此增 加 之 溫 度 最 好 是維持一段如從3 0分鐘至3小時的時 間 〇 以 此 方 式 ，該熱固型塑膠母體會形成網狀組織而形 成 鞘 (其會覆蓋住該核心的兩元件3,4)的合成橡膠則會 膨 脹 〇 因 爲 該 等凸緣7,8是藉由此兩彈簧而被壓制住 以 緊 靠 在 預 先 形成管體9的末端，所以此膨脹主要是徑 向 地 向 外 壓 制 。因此，一徑向壓力是向外地被施加在該 管 體 9; ，因 而 該 管體9是被推擠且緊靠著圓柱形凹處13 的 牆 上 〇 以 此 方式，儘管在此文中所例舉的是複合構造 的 該 m 陋 (其 t有鈴形末端和一從該中央至該等末端不斷 增 加 的 厚 度 )， 但均与壓力仍會被施加在該預先形成管 體 9 的 所 有 部 份上。自然而然地，在此階段期間中，彈 簧 2 1會允許該核心的兩元件3,4稍微地相互分離，隨 後 該 Ο Λ 力 是 被 施 加在該鞘24上以緊靠著該等角凸緣 /， Ο ° 該 模 具 是 被 打開而且該總成（其包括有該核心1和被 設 置 在 其 上 的 該體9)是在該網狀物階段的末端中而被 取 出 〇 在 此 點 時，形成該核心的該等元件3,4以及1〇 是 以 相 ΐ—τ 反 的 方 向從該體中而被取出，在此之後，該鞘 -10-According to the method of the present invention, a number of fabric layers of this type are wrapped around the core and the individual sheaths, the shape of which corresponds to the shape of the hub to be completed. In this way, when the mold is heated to form a reticulated structure of the thermoset matrix of the laminated tube body (which surrounds the core and the sheath), the material forming the sheath swells and thus A radial pressure is applied to the face of the pipe body, which is used to obtain a product with the necessary structural features. The main advantage of this thermal expansion sheath is that despite the possible composite construction of the pre-formed body (as described at the beginning of this article), which has two enlarged bell-shaped end portions and a continuously increasing thickness5, it is possible to apply this uniformly The other advantage of pressure is attributed to its elasticity. At the same time, 506917 V. Description of the invention (4) When the elastic sheath has a composite shape, the elastic sheath can be easily removed from the finished product. As described above, in the 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 temperature (the mold must be heated to this temperature) is preferably in the range of 80 ° C to 20 (TC. The mold is preferably maintained at a temperature in this range and lasts from 30 minutes to 3 In the range of hours, in the case where the method according to the present invention is implemented to produce the above-mentioned composite shape, the method is characterized in that the core will present a cylindrical central portion and two wider diameters and be composed of two A separate, axially continuous element (which has a contact plane perpendicular to the axis of the core) is composed so that the core can be separated from the tube after being removed from the mold. As mentioned above, the The core sheath remains in the tube after removing the core. Due to its elasticity, the sheath can be easily removed. As mentioned above, the tube is preferably pre-formed to present a cylindrical central portion And two enlarged end portions (which have a continuously increasing thickness toward its ends). In a preferred form of the example of the present invention, the two elements forming the core are combined with two end ring flanges, which are Used to limit The end of the tube body (preformed on the core) is included. Finally, according to another aspect of the present invention, the present invention also relates to a bicycle wheel hub obtained by the method of the present invention. The characteristics of the hub according to the present invention are It is composed of a single tube body (made of a structural fiber-based material incorporated in a plastic material mother body which is incorporated into a 506917 V. Invention Description (5). The tube body has a cylindrical central portion And two enlarged end portions. Preferably, the hub of the present invention will exhibit a continuously increasing thickness from the central portion toward the ends. The drawings are simply explained below with reference to the drawings Restricted example) to illustrate the present invention in detail, in which:-Figure 1 points out the perspective view of the core, which belongs to the equipment used in the method according to the invention,-Figure 2 illustrates two elements (in each other (In a separated state), which is the core formed in Figure 1,-Figure 3 illustrates the core in Figure 1, which is externally covered with many structural fiber-based fabrics According to the method of the present invention,-Figure 4 is a perspective view of a sheath of an elastic material, which is coated on the core in Figure 1,-Figure 5 is an assembly exemplified in the third circle A partial cross-sectional view of the element having two elements forming the core, the sheath covering the element and a pre-formed tube laminate thereon, and-Fig. 6 is a mold for the method according to the invention A cross-sectional view of FIG. 1. Referring to FIG. 1, the number 1 indicates a cylindrical core composed of two separate elements 3, 4. Each of these two elements 3, 4 is made of a metallic material such as steel. In the closed state exemplified in the figure, the two elements 3, 4 will form a substantially cylindrical core, which has a central portion-7-506917. V. Description of the invention (6) 2 (It presents a fixed Diameter) and two bell-shaped end portions 5,6 (which have an enlarged diameter, ending in ring flanges 7,8). Referring to Figs. 3 and 4, the core 1 is externally covered with a sheath 24 made of a high thermal expansion elastic material (refer to Figs. 4 and 5). Preferably, the elastic material forming the aforementioned sheath has a thermal expansion coefficient of more than 15 × 1 (T5 legs / ° C) and a maximum continuous heat resistance temperature of more than 100 ° C. For example, the material forming the core sheath may be a synthetic rubber market Some such products, such as Airtech International Inc., Huntington Beach, California, USA trademark AIRCAST 3700. This material is due to its high thermal expansion coefficient (15x1 (Γ5 wake / ° C) and its high continuous heat resistance (232t ), Because of its good thermal conductivity (2.59W / m ° C) and its good maximum tensile stress (680%) 5 this material is better. It is removed from the mold and the core is moved After the removal, the above-mentioned good properties facilitate the removal of the sheath from the inner surface of the finished product. According to the core [(Figure 4), it has a central cylindrical portion and a two bell-shaped end portion] structure The sheath is pre-formed and preferably shaped to the size so as to be coated on the core by slightly stretching it so that the sheath can be restored by its elastic return effect Stuck to Core. The core and individual sheaths are therefore a layer coated with a sheet of structural fiber-based material (typically carbon fiber), which is incorporated into a matrix of a thermoset plastic material. Preferably, according to the present application The principle of the co-filed patent case is that the fabric layer on the core and the sheath includes one or more drawings 506917 V. Description of the invention (7) A fabric wound around a larger diameter end and a central portion of the core Windings of strips and many plies (which extend over the entire length of the core), each fold will partially cover the core in a circumferential direction, and the thickness is Is applied to several faces of the core to provide resistance to the structure in the radial direction. As shown in Figure 4, several layers of a piece of fabric are wrapped around the entire outer face of the core 1 to form A pre-formed pipe body 9 also presents a central fixed portion 10 and two bell-shaped ends 1 1 and 12 of a larger diameter. In addition, the thickness of the pre-formed pipe body 9 will vary from the end direction. The central part is constantly increasing. Finally The two ring end flanges 7, 8 of the core 1 axially contain the ends of the pre-formed tube body 9. The assembly (which is composed of the core 1, includes two elements 3, 4, a sheath 24 and The pre-formed tube body 9 is looped around the assembly and is positioned in a cylindrical recess 13 of a mold device 14 (formed by an upper mold half 15 and a lower mold half 16), which presents A shape corresponding to the outer shape of the outer surface of the hub to be completed, that is, substantially corresponding to the outer surface of the pipe body 9 (shown as the fourth circle) in advance. The end of the recess 13 is borrowed The lids 17, 18 (which are fastened to the two end flanges of the mold halves 15, 16 by screws 19) are closed. Each of these two covers 17, 18 is combined with a central cylindrical housing 20, in which an individual coil spring 21 is provided. Each of these two spiral springs 21 is disposed axially between the bottom wall 20a of the other tubular casing 20 and the individual end surface of the core 1. The two springs 21 will elastically press the two elements 3 and 4 of the core 1 so that the two elements 3 and 4 are phased. »9-506917 V. Description of the invention (8) The close contact makes these elements correspond to them. The contact plane 22 (which is perpendicular to the axis 23 of the core 1) is kept in contact. After the assembly (which consists of a core and a pre-formed tube body wound around the core) is placed in the mold, the mold is brought to a size sufficient to form a matrix of a thermoset plastic material (its system The temperature of the reticular structure belonging to the pipe body 9) includes, for example, a temperature within a range from 80 ° C to 200 ° C. This increased temperature is preferably maintained for a period of time such as from 30 minutes to 3 hours. In this way, the thermosetting plastic matrix will form a mesh structure to form a sheath (which will cover the two elements 3 of the core, 4) The synthetic rubber will expand. Because the flanges 7, 8 are pressed by the two springs to abut the end of the pre-formed pipe body 9, the expansion is mainly pressed radially outward. . Therefore, a radial pressure is applied outwardly to the pipe body 9; therefore, the pipe body 9 is pushed against the wall of the cylindrical recess 13 in this manner, although it is exemplified herein For example, the composite structure (the t has a bell-shaped end and an increasing thickness from the center to the ends), but all pressure and pressure will still be applied to all parts of the pre-formed pipe 9 on. Naturally, during this phase, the spring 21 will allow the two elements 3, 4 of the core to be slightly separated from each other, and then the 0 Λ force is applied to the sheath 24 to abut the corner flange / 〇 ° The mold is opened and the assembly (which includes the core 1 and the body 9 disposed thereon) is taken out at the end of the mesh stage. At this point, the formation The core elements 3, 4 and 10 are removed from the body in opposite directions ΐ-τ, after which the sheath-10-
506917 五、發明説明（9 ) 24(其係仍然與該管體的內表面相結合）是藉由彈性變 形而被取出。因此所完成的該輪轂特別地是由結構纖 維材料所製成，典型地爲碳纖維材料且是由一單一零件 所製成，儘管是如上所述的複合幾何外形。自然而然地， 該產品可以受到額外的機械加工（例如可在用於固定該 等輪輻的鈴形末端中鑽孔以形成一組徑向孔）其使該零 件可被使用爲一腳踏車輪轂。 最後，明顯地，例舉於第6圖中的設備可藉由設置一 牆（其具有如上所示高熱膨脹材料）以相對於該模具凹 處的表面而被修改也再一次藉由使用由兩金屬材料元 件3，4所製成的一核心。在此情形下，該凹處的該牆的 熱膨脹可以在該預先形成管體9(其會因而被壓制在該 金屬核心上）的外表面上施加一徑向壓力（其係從外朝 向中心）。 自然而然地，可以對在此文中所例舉的本發明實例的 形式和構造實施許多種變化，文中的槪念（其係突顯出 本發明之特黴）如以下申請專利範圍所定義的。 例如，儘管本描述和附圖淸楚地指出一腳踏車輪轂， 但是明顯地根據本發明之方法可以被應用至製造具有 一類似外形的其它零件，特別是其它的腳踏車零件。因 此，這些應用以及所衍生的產品也會落在本發明的範圍 之中。 符號說明 1…核心 -11- 506917 五、發明説明（10 ) 2··· 中央部份 2 a. "牆 3,4 ...元件 5,6 ，1〇...部份 7,8 ...凸緣 9··· 體 11， 1 2…末端 13. ..凹處 14. ..設備 15,16…模具 17, 1 8…蓋子 19. ..螺絲 20. ..外殼/裝置 2 1 · ..彈簧 22 · ..平面 23 · ··_ 24. • •鞘 -12-506917 V. Description of the invention (9) 24 (which is still combined with the inner surface of the pipe body) is taken out by elastic deformation. The completed hub is therefore made in particular from a structural fiber material, typically a carbon fiber material and from a single part, despite the composite geometry as described above. Naturally, the product can be subjected to additional machining (for example, holes can be drilled into the bell-shaped ends used to hold such spokes to form a set of radial holes) which allows the part to be used as a pedal wheel hub. Finally, it is clear that the device exemplified in Figure 6 can be modified by providing a wall (which has a high thermal expansion material as shown above) relative to the surface of the recess of the mold and again by using two A core made of metallic material elements 3,4. In this case, the thermal expansion of the wall in the recess can exert a radial pressure on the outer surface of the pre-formed pipe body 9 (which will thus be pressed on the metal core) (which is directed from the outside towards the center) . Naturally, many changes can be made to the form and structure of the examples of the invention exemplified herein. The intent of the text (which highlights the special mold of the invention) is as defined in the scope of the patent application below. For example, although this description and the drawings clearly point out a bicycle wheel hub, it is obvious that the method according to the present invention can be applied to the manufacture of other parts having a similar profile, especially other bicycle parts. Therefore, these applications and derived products also fall within the scope of the invention. Explanation of symbols 1 ... Core-11-506917 V. Description of the invention (10) 2 ··· Central part 2 a. &Quot; Wall 3,4 ... Elements 5,6, 1〇 ... Parts 7,8 ... flange 9 ... body 11, 1 2 ... end 13 ... recess 14 ... device 15, 16 ... mold 17, 1 8 ... cover 19. screw 20 ... housing / device 2 1 · .. Spring 22 · .. Flat 23 · ·· 24. • • Sheath -12-