201220333 六、發明說明： 【發明所屬之技術領域】 本發明是有關於-種複合材料工件的製造方法，特別 是指一種内埋磁性元件之複合材料工件的製造方法。 【先前技術】 現有較具質感之包裝材、行李箱，或是最近相當流行 之平板電腦的保護套，皆是使用磁扣定位的方式來將開口 處固定，以保護套為例，是在保護套的套體内埋設有一第 一磁性件，而由該套體延伸出一定位帶，於該定位帶上對 應該第一磁性件處設置一能與該第一磁性件相吸的第二磁 性件，藉此當該第二磁性件靠近該第一磁性件時，兩者就 月包相吸而達到將保護套内之物品定位的作用。 然而，在以複合材料（例如由複合纖維浸潤於樹脂而形 成的預浸織布層）製造該保護套的過程中，是先於由複合材 料預定成型的該套體及定位帶的預定位置上分別設置有該 第磁性件及第二磁性件，然後再配合模具對該複合材料 直接進行熱壓合，但在熱壓合過程中的高溫將會導致該第 一、二磁性件消磁而失去磁性吸附的功能，為了解決上述 問題’有業者是採用耐高溫之磁性元件，雖然可以克服高 溫所導致的消磁問題，但耐高溫之磁性元件價格相當昂貴 ’使得生產成本大幅提高，不易普及使用。 除此之外，在熱壓合過程中，因為複合材料在高溫下 會有内部樹脂炫融流動的情形，使得該第一、二磁性件可 能會發生移位的現象，導致熱壓合完成後該第一、二磁性 201220333 件會有無法精確對位的問題。 【發明内容】 因此，本發明之目的，即在提供一種可以降低生產成 本且精確定位的内埋磁性元件之複合材料工件的製造方法 〇 於是，本發明内埋磁性元件之複合材料工件的製造方 法，包含一成型步驟、一結合步驟，及一充磁步驟。 該成型步驟是將多層預浸織布層對齊疊合並且熱壓合 ，以成型出兩個相同的第一複合材料板材，另將多層分別 開設有至少一穿孔的預浸織布層對齊疊合，再使至少一感 磁元件置於所述穿孔内並且熱壓合’以成型出一個設置有 該感磁元件的第二複合材料板材。 該結合步驟是將該第二複合材料板材置於該二第一複 合材料板材之間，並使該第二複合材料板材與所述第一複 合材料板材固定在一起，而形成一複合材料工件。 該充磁步驟藉由通電至一線圈，使該線圈激磁產生磁 場而感應該複合材料工件内之感磁元件，進而使該感磁元 件充磁轉變成一磁性元件。 本發明之功效在於：利用所述穿孔使該感磁元件結合 定位於邊第二複合材料板材上，再與所述第一複合材料板 材固定在一起並進行充磁，不但能精確定位該感磁元件， 還旎克服尚溫消磁的問題，不需再使用昂貴的耐高溫磁性 元件’而能大幅降低生產成本。 【實施方式】 201220333 點與功效，在 說明中，將可 有關本發明之前述及其他技術内容、特 以下配合參考圖式之一個較佳實施例的詳細 清楚的呈現。 參閱圖1與圖2，為本發明内埋磁性元件之複合材料工 件7的製造方法之較佳實施例，包含一成型步驟Η、—、= 合步驟22 ’及一充磁步驟23。201220333 VI. Description of the Invention: [Technical Field] The present invention relates to a method of manufacturing a composite material workpiece, and more particularly to a method of manufacturing a composite material workpiece in which a magnetic element is embedded. [Prior Art] Existing protective packaging materials, luggage cases, or the protective sleeves of the most popular tablet computers are all fixed by magnetic fasteners. For example, the protective cover is protected. a sleeve is embedded in the body with a first magnetic member, and a sleeve is extended from the sleeve, and a second magnet corresponding to the first magnetic member is disposed on the positioning strip corresponding to the first magnetic member. Therefore, when the second magnetic member is close to the first magnetic member, the two are attracted by the monthly package to achieve the positioning of the articles in the protective cover. However, in the process of manufacturing the protective cover by a composite material (for example, a prepreg woven fabric layer formed by impregnating a resin with a composite fiber), the predetermined position of the sleeve and the positioning tape which is predetermined by the composite material is formed. The first magnetic member and the second magnetic member are respectively disposed, and then the composite material is directly thermocompression-bonded with the mold, but the high temperature during the hot pressing process causes the first and second magnetic members to demagnetize and lose magnetic properties. In order to solve the above problems, the function of adsorption is to use a high-temperature resistant magnetic component. Although it can overcome the degaussing problem caused by high temperature, the high temperature resistant magnetic component is quite expensive, which makes the production cost greatly increased and is not easy to use. In addition, in the process of thermal compression, because the composite material has a molten and flowing internal resin at a high temperature, the first and second magnetic members may be displaced, resulting in completion of the thermocompression. The first and second magnetic 201220333 pieces will have problems that cannot be accurately aligned. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method of manufacturing a composite workpiece in which a buried magnetic element can be reduced in production cost and accurately positioned. Thus, a method of manufacturing a composite workpiece in which a magnetic element is embedded in the present invention , comprising a molding step, a bonding step, and a magnetizing step. The forming step is that the multi-layer prepreg woven fabric layer is laminated and thermocompression-bonded to form two identical first composite material sheets, and the plurality of prepreg woven fabric layers each having at least one perforation are aligned and overlapped. Then, at least one magnetic sensitive component is placed in the perforation and thermocompressed to form a second composite material sheet provided with the magnetic sensitive component. The bonding step is such that the second composite sheet is placed between the two first composite sheets and the second composite sheet is secured to the first composite sheet to form a composite workpiece. The magnetizing step is performed by energizing a coil to cause the coil to generate a magnetic field to induce a magnetic field in the composite workpiece, thereby magnetizing the magnetic sensing element into a magnetic element. The effect of the invention is that the perforation is used to position the magnetic sensitive component on the side of the second composite material plate, and then the first composite material plate is fixed together and magnetized, so that the magnetic sensing can be accurately positioned. The component also overcomes the problem of degaussing at room temperature and eliminates the need for expensive high-temperature magnetic components, which can significantly reduce production costs. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the description, the foregoing and other technical aspects of the present invention will be described in detail with reference to a preferred embodiment of the present invention. Referring to Figures 1 and 2, a preferred embodiment of a method of fabricating a composite material workpiece 7 for a buried magnetic component of the present invention comprises a forming step Η, -, = step 22' and a magnetizing step 23.
該成型步驟21是將多層預浸織布層3對#疊合並且熱 壓合，以成型出兩個相同的第一複合材料板材4，另將多層 分別開設有多數個穿孔31的預浸織布層3對齊疊合，再使 多數個感磁元件5置於所述穿孔31内並且熱壓合以成型 出-個設置有所述感磁元件5的第二複合材料板材“於本 實施例中，所述感磁元# 5的材質為稀土金屬，而所述預 浸織布層3是選自碳纖維織布，也可以是選自玻璃纖維織 布、玄武岩纖維織布，或克拉纖維織布，不以此為限。另 外’於本實施例中是使用多個感磁元件5, #然也可以㈣ 際需求只使用一個感磁元件5，不以此為限。 該結合步驟22是將該第二複合材料板材6置於該二第 =複合材料板材4之間，並使該第二複合材料板材6與所 述第-複合材料板# 4以在—起，而形成—複合材料工 件7。於本實施例中，該結合步驟22 {以黏著劑將該第二 複合材料板材6與所述第—複合材料板材4膠合在一起， 當然也可以是使用如膠帶等黏著件黏貼於該第二複合材料 板材6與所述第-複合材料板材4的外側以達到固定的效 果，由於岐的方式非常多，不再—列舉，也不應以本 201220333 貫施例所揭露的内容為限。 該充磁步驟23是藉由通電至一線圈（圖未示），使該線 圏激磁產生磁場而感應已内埋於該複合材料工# 7内之感 磁元件5’進而使所述感磁元件5充磁轉變成磁性元件卜 ，於該充磁過程與該線圏結構皆屬熟悉充磁技術之人士所 月&輕易實施，因此不再予以贅述其細節。 —透過上述步驟’利用所述穿孔31使所述感磁元件$結 合定位於㈣三複合材料板材6上，再與所述第-複合材 料板材4固定在一起並進行充磁，不但能精確定位所述感 ，兀件5 ’還能克服高溫消磁的問題’不需再使用昂貴的耐 高溫磁性元件，而能大幅降低生產成本。 綜上所述，本發明透過先於該成型步驟21中使所述感 磁元件5定位於該第二複合材料板材6内，再進行該充磁 步驟23，不但能精確定位所述感磁元件5，還能克服高溫 ，肖磁的問題，；F需再使用昂貴的财高溫磁性元件，有效降 低生產成本，故確實能達成本發明之目的。 准以上所述者，僅為本發明之較佳實施例而已，當不 月t以此限定本發明實施之範圍，即大凡依本發明申請專利 $&圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一流程圖，說明内埋磁性元件之複合材料工件 的製造方法之較佳實施例；及 圖2是一示意圖，輔助說明圖1。 201220333 【主要元件符號說明】 21 成型步驟 4 第一複合材料板材 22 結合步驟 5 感磁元件 23 充磁步驟 6 第二複合材料板材 3 預浸織布層 7 複合材料工件 3 1 穿孔 8 磁性元件The molding step 21 is to laminate and heat-press the multi-layer prepreg layer 3 to form two identical first composite sheets 4, and further pre-impregnate the plurality of layers 31 with a plurality of perforations 31 respectively. The cloth layers 3 are aligned and overlapped, and then a plurality of magnetic sensitive elements 5 are placed in the through holes 31 and thermocompression-bonded to form a second composite material plate provided with the magnetic sensitive elements 5. The material of the magnetic sensitive element # 5 is a rare earth metal, and the prepreg layer 3 is selected from a carbon fiber woven fabric, and may be selected from a glass fiber woven fabric, a basalt fiber woven fabric, or a carat fiber woven fabric. The cloth is not limited thereto. In addition, in the present embodiment, a plurality of magnetic sensitive elements 5 are used, and it is also possible to use only one magnetic sensitive element 5, which is not limited thereto. The combining step 22 is The second composite material sheet 6 is placed between the two composite material sheets 4, and the second composite material sheet 6 and the first composite material sheet 4 are formed to form a composite material. The workpiece 7. In the embodiment, the bonding step 22 {adhesives the second composite material The material 6 is glued together with the first composite material sheet 4, and of course, an adhesive member such as a tape may be adhered to the outer side of the second composite material sheet 6 and the first composite material sheet 4 to achieve a fixed effect. Because the way of 岐 is very much, no longer - enumerated, nor should it be limited by the contents disclosed in this 201220333 embodiment. The magnetization step 23 is made by energizing a coil (not shown) to make the line The excitation generates a magnetic field to induce the magnetic sensitive component 5' embedded in the composite material #7, thereby magnetizing the magnetic sensitive component 5 into a magnetic component, and the magnetization process and the coil structure are both The person who is familiar with the magnetization technology is easy to implement, and therefore the details are not described again. - Through the above steps, the magnetic component 0 is combined and positioned on the (four) three composite material sheet 6 by using the through hole 31. Further, the first composite material sheet 4 is fixed together and magnetized, so that the sensation can be accurately positioned, and the 5 member 5' can overcome the problem of high temperature degaussing' without using expensive high temperature resistant magnetic components. Can be substantial In view of the above, the present invention performs the magnetization step 23 by positioning the magnetic sensitive component 5 in the second composite material sheet 6 prior to the molding step 21, thereby not only accurately positioning the magnetic component. The magnetic sensitive element 5 can overcome the problem of high temperature and magnetic distortion; F needs to use expensive high-temperature magnetic components to effectively reduce the production cost, so the object of the present invention can be achieved. The preferred embodiment of the present invention, when not limited to the scope of the present invention, that is, the simple equivalent changes and modifications made by the present invention in accordance with the contents of the invention and the description of the invention are still BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart illustrating a preferred embodiment of a method of fabricating a composite workpiece having a buried magnetic component; and FIG. 2 is a schematic view illustrating FIG. . 201220333 [Explanation of main component symbols] 21 Molding step 4 First composite material sheet 22 Bonding step 5 Magnetic sensor 23 Magnetization step 6 Second composite sheet 3 Prepreg layer 7 Composite workpiece 3 1 Perforation 8 Magnetic element