200824832 九、發明說明： 【發明所屬之技術領域】 本發明係在提供一種嶄新的金屬複合成型方式。藉由結合鎂 合至材料經由壓鑄或半固態射出成型製程所生產之主結構框 體，結合以異種金屬如鋁合金、鈦合金或不銹鋼等沖壓成型之表 面處理裝飾金屬薄片，來產製具有高強度、輕量化之優良亮麗金 屬本質與金屬外觀的機殼產品。 鎂合金工件經傳統的壓鑄或半固態射出成型與沖切去毛 邊、鑽孔攻牙加工之後，施以清洗、抗氧化等處理，以提供機殼 所需之框體素材。之後，藉由_沖壓成型製程的導入以加工如 鋁合金、鈦合金或不銹鋼等異種金屬薄片，作為機殼之表面裝飾 覆盍層。而後，結合鎂合金框體素材與異種金屬膜，以產製具有 高強度、輕量化之金屬本質以及優異亮麗金屬外觀之機殼產品， 使適用於3C產品設計多變化之造型需求。 【先前技術】 對於筆記型電腦、手機、PDA等冗產品朝輕、薄、短、小的 設計趨勢以及高強度、散紐的性質需求，加諸綠色環保對於塑 膠減廢比例的提高，使得輕金屬材料使用於該類產品機殼的重要 性日益顯著。以現況而言，該類輕金屬材料的使用包含鎂合金、 鋁合金、鈦合金以及不銹鋼等。成型製造方法則涵蓋壓鑄、半固 態射出與1U態沖壓等方式。之後，再配合塗裝烤漆、魏或陽極 處理等表面處理製程以產製所需外觀賊之金屬機殼。 5 200824832 鎂合金因其優異的比強度是最具潛力的輕量化材料，由於 具諸多優良的性質，已經廣泛地使用於3C產品。一般而言，鎮合 金產品的製造方法涵蓋全液態的壓鑄成型、半固態的射出成型^ 兩種主要的生產方式。由於鎂合金熔湯具有極為良好的材料流動 性，對於複雜的薄件成型有其先天的優勢。然而，由於屬高溫高 射速的製程所引發引發氣孔包覆、表面充填不良等問題，成型= 件表面品質較差。經由後製程表面處理時塗裝性不佳，生產良率 低。同時’對於外觀用途亮麗需求的製程處理如陽極處理、電鍍 處理等困難度增加，生產經濟效益差。即便是施以傳統的塗裝處 理也經苇需要先進行孔洞補土、精研、拋光等製程，既耗時又耗 工。而鎂合金以傳統塗裝處理也難以直接呈現金屬本質與金屬外 觀的南貝貝感，此誠為一大缺慽，也是亟待解決的一大課題。 另一方面，屬於固態成型的沖壓製程則已廣泛地被應用於鋁 合金、鈦合金以及不銹鋼等機殼的製造。由於使用的原料為軋延 後之薄板，材料具有十分優異的表層緻密組織結構，易於進行後 續亮麗需求的陽極處理、電鍍處理製程，乃為其最大之優勢。然 而，由於機殼對於外力承載剛性需求，使用之板材有一定之厚度 限制，叙而吕在〇.5mm以上。另一方面，由於材料特質與工件 成型之幾何效應，對於此厚度等級以上的沖壓件具有一定的回彈 里，使得無法製造出如壓鑄鎂合金般炫麗的銳角轉折造型，乃為 其不足之處。同時，沖壓製程係藉由沖孔、彎曲、引抽等機構製 ^出具有立體造型的功，而無法做出後續機殼背面於組裝時所 需之螺孔(boss)與補強肋(rib)。對此，沖壓件必須結合鑲入的塑膠 件，或是進行金細件焊接方式，來滿足螺孔組裝所需之功能， 對於機殼造型設計的彈性大大限制。 6 200824832 【發明内容】 =㈣之主要目的在於提供―種_的金屬複合成型方式， 鑄ί射出成型製程所生產之主結構框體，以及 化吝 表面處理裝飾膜’來產製具有高強度、輕量 成㈣Γφ⑽正體機殼的製作縣以鎂合金工件經傳統的麟 =射出，成型與沖切去毛邊、鑽孔攻牙、拋光等加工之後，施 蕤Γϋΐ ι=·化處轉處理’以提供機殼所需之鐘素材。之後， ^、χίΓ錢型製程的導人以加工異種金屬如銘合金、鈦合 體素材與異種金=機層。而後結合鎮合金框 彩光澤與圖紋。:以製造出所要的色 及優異亮糊物鹰、跑_本質以 m靖^合紅舰細加吨，施⑽脂、清洗、乾 二二^程巾離制與加卫油 3 ^後，對於異種金屬如鋁合金、 τ機械拉髮絲等處理，以達到所需具有之找 到的组人㈣i # 村獅贿合金框贿賴製程所得 ::方Π::ΐ之=飾處理。主要的製程乃為-符合時代潮流疋一 _的綠色製程’誠為一種優異與 【實施方式】 鎂合來法包含^J步驟：（1)對額定尺寸之機殼拖體使用 ’、至"、i液怨的壓鑄成型或半固態的射出成型製造出所需 7 200824832 框體之毛胚；及⑵對細毛胚進行王件沖切、鑽孔、攻牙等輕加 工；=及，(3)對該工件作脫脂、清洗和抗腐蝕、抗氧化之防護處 理’完成機殼所需之框體素材；而後，（4)藉由沖壓製程的導入， 加工外觀披覆用輕金屬薄片，（5)結合鎂合金框體與成型金屬薄 片，（6)對鎂合金與輕金屬之複合體施以切邊、整緣及進一步之表 面裝飾處理以完成所需之成品。 本叙明之物品包含下列構造··鎂合金本體；沖壓成型異種金 屬如鋁合金、鈦合金、不銹鋼膜，覆蓋於該鎂合金本體之上。其 中，金屬薄片可於衝壓成型前作表面預處理，或於框體盥声 結合後再進行。 1曰 〜^ 了使貴審查委員能更進一步瞭解本發明之特徵及技術内 ^ 參閱以下有關本發明之詳細說明與卩_，豸而所附圖式僅 提供參考與說明用，並非用來對本發明加以限制者。 。如第一圖所示，為典型的鎂合金外觀用機殼工件生製作流 = 、、、二以傳統的全液態的壓鑄成型或半固態的射出成型製造出所 需框體之毛胚。而後經沖切、鑽孔攻牙加工、研磨拋光、清洗、 皮膜化成處理、烤漆塗裝處理製程之生產流程。 〇如第二圖所示，則為典型的沖壓式金屬機殼外觀件之生產流 程。輕金屬板材如鋁合金、鈦合金以及不銹鋼等以沖壓設備進行 ^孔、拉伸引抽、折彎等機構，加工細定三次元尺寸的機殼工 而後，將多餘之毛邊沖除、精修以制所需之毛胚件。毛胚 =精清洗後得以—般塗裝烤漆、陽極處理、電鑛處理等以提供所 而外觀質感之機殼。 如第三圖所示，為本發明金屬複合成賴造方法實施例步驟 8 200824832 之~ ° _定尺寸之機殼框體，使祕合金材料以全液態 剂，成型或半__出成型製造出所需框體之毛胚；及對成 t胚f行卫件沖切、鑽孔、攻牙等輕加卫；以及，對該工件作 冥一胃腐μ氧化之防護處理，完成機殼所S之框體素材。 面，藉由沖壓製程的導入，加工外觀披覆用輕金屬薄片。 人t結合鎮合金框體與沖壓成型金屬薄片，再經切邊、整緣鎂 田t屬之複合體以完成所需之成品。對於沖壓製程之板材 人作進一步表面處理之鋁合金、鈦合金、不銹鋼等軋延材， 飾^成贿再作烤漆、電鍍、髮絲加卫、鐳雕、陽極處理等裝 _衣^—方面，也可以使用預作烤漆、電鑛、髮絲加工、错 _士人t轉相祕狀薄板材，騎㈣後直接與鎂合金本 炎二’ A朗f之機殼外觀件使用，如第四圖所示。第五圖則 明金屬複合成㈣造方法，鎂合金基材與金屬薄片覆蓋層 結構之示意圖。 相祕傳_液態壓鑄或相態軸細等金屬機殼的生產 …+^本1明之創新製程可提供高強度、輕量化、造型富變化的 二贼^、組裝便利性等等優異的特性。更重要的特質為以金屬 接呈辦金屬絲外觀賊，誠為—雜具應用價值 的創新發明。 曰與一般板材沖壓成型所使用板材厚度在〇·5_以上，以直接 设剛性與強度承載的考量之差異，本發明對於強度承載係 旦^ S金框體提供’輕金屬薄片之主要功用乃被覆美觀化之考 =因此，沖壓用金屬板材的厚度界定在ai2mm以下。關於本發 月衣程限制之理由，茲配合實驗例說明如后： 1 & 表一所示乃為本發明經由選用不同之輕金屬與厚度等級所達 放用比車乂。一般的鋁合金由於具有較低之強度。在沖壓製程 彈性回彈量小，使得形狀;東結性較佳。因此，即便薄片厚度達 9 200824832 0·12_時仍然具有極佳的銳角轉折密合性。相對地，欽合金、不 銹鋼等具有較高的強度值，使得薄板厚度達〇 〇6_時，由於彈性 =復致使轉折密合性逐漸變差。當薄板厚度進一步增加達〇12_ 日$已L元王操法滿足與鎂合金結合時銳角轉折密合性的需求。 因此，對於本發明在薄板厚度的界定有其必要之考量點。 表- ·’中壓金屬薄片厚度對於本發明複合成型金屬機殼產品品質的影響 金屬膜~屬膜冢度， 對鎂合金表面缺 陷之覆蓋性200824832 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention provides a novel metal composite molding method. The main structural frame produced by the die-casting or semi-solid injection molding process by combining magnesium into the material, combined with the surface-treated decorative metal foil stamped by a dissimilar metal such as aluminum alloy, titanium alloy or stainless steel, has a high production cost. The strength and lightness of the shell products with excellent metallic properties and metallic appearance. Magnesium alloy workpieces are subjected to conventional die-casting or semi-solid injection molding, punching and burring, drilling and tapping, and then subjected to cleaning and oxidation treatment to provide the frame material required for the casing. Thereafter, a different metal foil such as an aluminum alloy, a titanium alloy or a stainless steel is processed by the introduction of a press forming process to cover the surface of the casing. Then, combined with magnesium alloy frame material and dissimilar metal film, to produce a high-strength, lightweight metal essence and an excellent bright metal appearance of the casing product, it is suitable for the modeling needs of 3C product design. [Prior Art] For the design of notebook computers, mobile phones, PDAs, etc., which are light, thin, short, and small, and the demand for high-strength and sporadic nature, the environmental protection for plastics reduces the proportion of plastic waste reduction, making light metal The importance of materials used in the casing of such products is becoming increasingly significant. In the current situation, the use of such light metal materials includes magnesium alloys, aluminum alloys, titanium alloys, and stainless steel. Molding manufacturing methods cover die casting, semi-solid injection and 1U stamping. After that, it is combined with a surface treatment process such as painting, Wei or anodizing to produce a metal case of the desired appearance. 5 200824832 Magnesium alloy is the most potential lightweight material due to its excellent specific strength. Due to its excellent properties, it has been widely used in 3C products. In general, the manufacturing method of Zhenhe gold products covers two main production methods: full-liquid die-casting and semi-solid injection molding. Because magnesium alloy melt has excellent material flow, it has its inherent advantages for complex thin parts. However, due to the problems caused by the high temperature and high rate of firing process, such as pore coating and surface filling failure, the surface quality of the molded parts is poor. The surface coating treatment is not good at the surface, and the production yield is low. At the same time, the degree of difficulty in process processing such as anode treatment and electroplating treatment for the bright demand of appearance is increased, and the production economic benefit is poor. Even with the traditional coating process, it is necessary to perform the processes of hole filling, lapping, polishing, etc., which is time consuming and labor intensive. However, it is difficult to directly present the Nanbeibei feeling of metal essence and metal appearance by the traditional coating treatment of magnesium alloy. This is a major shortcoming and a major issue to be solved. On the other hand, stamping processes belonging to solid state molding have been widely used in the manufacture of casings such as aluminum alloys, titanium alloys, and stainless steel. Since the raw material used is a rolled sheet, the material has a very excellent surface dense structure, and the anode treatment and electroplating process which are easy to carry out subsequent brightening are the greatest advantages. However, due to the rigidity of the casing for the external force bearing, the plate used has a certain thickness limit, and the 而 吕 〇 is more than 5 mm. On the other hand, due to the material characteristics and the geometric effect of the workpiece forming, there is a certain rebound in the stampings above this thickness level, making it impossible to produce a sharp-angled turning shape as a die-cast magnesium alloy. . At the same time, the stamping process is performed by means of punching, bending, drawing, etc., and the work of having a three-dimensional shape is not possible, and the boss and the reinforcing rib (rib) required for the assembly of the back of the casing can not be made. . In this regard, the stamping parts must be combined with the embedded plastic parts, or the gold thin parts welding method to meet the functions required for the screw hole assembly, and the flexibility of the casing design is greatly limited. 6 200824832 [Summary of the Invention] The main purpose of (4) is to provide a metal composite molding method of "species", a main structural frame produced by the casting and forming process, and a decorative surface film of the enamel surface to produce high strength. Lightweight into (four) Γ φ (10) the body of the production of the shell of the magnesium alloy workpiece through the traditional Lin = injection, forming and punching to the burrs, drilling and tapping, polishing and other processing, Shi 蕤Γϋΐ · = · Provide the material needed for the case. After that, the leaders of the ^, χίΓ-type process were processed to process dissimilar metals such as alloys, titanium composite materials and heterogeneous gold = machine layers. Then combined with the town alloy frame color gloss and pattern. : To produce the desired color and excellent bright paste eagle, run _ essence to m Jing ^ He Hong Ship fine plus tons, Shi (10) grease, cleaning, dry two two-way towel and Jiawei oil 3 ^, For the treatment of dissimilar metals such as aluminum alloy, τ mechanical pull hair, etc., in order to achieve the desired group of people (four) i #村狮Bold alloy box bribe Lai process:: Fang Wei:: ΐ之=饰处理. The main process is - a green process that conforms to the trend of the times _ _ is an excellent and [implementation] Magnesium method includes ^J steps: (1) use of the nominal size of the shell drag, 'to ", i-resistance die-casting or semi-solid injection molding to produce the required blank of 200824832 frame; and (2) light processing of fine blanks for punching, drilling, tapping, etc.; 3) Degreasing, cleaning and anti-corrosion and anti-oxidation treatment of the workpiece 'to complete the frame material required for the casing; and then, (4) processing the appearance of the coating with light metal foil by the introduction of the stamping process, 5) Combining the magnesium alloy frame with the formed metal foil, (6) applying a trimming edge, a full edge and further surface decoration treatment to the composite of the magnesium alloy and the light metal to complete the desired finished product. The articles described herein include the following structures: a magnesium alloy body; a stamped and formed heterogeneous metal such as an aluminum alloy, a titanium alloy, or a stainless steel film overlying the magnesium alloy body. Among them, the metal foil can be surface-pretreated before stamping or after the frame is combined. 1 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The invention is limited. . As shown in the first figure, a typical magnesium alloy appearance is produced by using a casing workpiece = /, and the conventional full-liquid die-casting or semi-solid injection molding to produce the desired blank of the frame. Then, through the cutting, drilling and tapping processing, grinding and polishing, cleaning, film formation processing, paint processing process production process. As shown in the second figure, it is the production process of a typical stamped metal casing appearance. Light metal plates such as aluminum alloys, titanium alloys, and stainless steels are punched, drawn, drawn, bent, etc., and machined to a three-dimensional size of the casing, and then the excess burrs are washed out and refined. The required blanks are made. Gross embryos = After cleaning, the coating can be painted, anodized, ore-treated to provide a look and feel. As shown in the third figure, in the embodiment of the metal composite forming method of the present invention, step 8 200824832 is a casing frame of a size of 0 ° _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The blank of the required frame; and the light-lifting of the punching, drilling, tapping, etc. of the t-embres; and the protection of the workpiece by the stomach, the oxidation of the skin, and the completion of the casing The frame material of the S. The surface is coated with a light metal foil for the appearance of the coating by the introduction of a stamping process. The human t combines the town alloy frame with the stamped metal foil, and then the trimmed and trimmed magnesium field t-composites to complete the desired finished product. For the surface of the stamping process, the aluminum alloy, titanium alloy, stainless steel, etc., which are further surface-treated, are decorated with briquettes, painted, fused, polished, anodized, etc. It can also be used as pre-painted paint, electric mine, hair processing, wrong _Shiren t-phase secret thin sheet, riding (four) directly with the magnesium alloy Ben Yan II 'A Lang f shell appearance parts, such as The four figures are shown. The fifth figure shows the structure of the metal composite into a (four) method, and the structure of the magnesium alloy substrate and the metal foil cover layer. The secret secret _ liquid die casting or phase shaft fine metal casing production ... + ^ Ben Ming's innovative process can provide high strength, lightweight, shape and change of the two thieves ^, assembly convenience and other excellent characteristics. The more important feature is the appearance of a metal wire thief with a metal connection, which is an innovative invention of the application value of miscellaneous tools. The thickness of the sheet used for stamping and forming of general sheet metal is above _·5_, and the difference between the rigidity and the strength bearing is directly considered. The main function of the present invention is to provide a light metal sheet for the strength bearing system. Aesthetics test = Therefore, the thickness of the metal sheet for stamping is defined below ai2mm. The reasons for the restrictions on the clothing of the month are as follows: 1 & Table 1 shows the invention according to the selection of different light metals and thickness grades. Typical aluminum alloys have lower strength. In the stamping process, the amount of elastic rebound is small, making the shape; the east knot is better. Therefore, even when the sheet thickness reaches 9 200824832 0·12_, it has excellent sharp corner folding adhesion. In contrast, Qin alloy, stainless steel, etc. have higher strength values, so that when the thickness of the sheet reaches 〇 _ 6 _, the transition adhesion is gradually deteriorated due to the elasticity = re-creation. When the thickness of the sheet is further increased by 〇12_日$, the L-language method satisfies the need for acute-angle transitional adhesion when combined with the magnesium alloy. Therefore, it is necessary to consider the thickness of the sheet in the present invention. Table - · The effect of the thickness of the medium-pressure metal foil on the quality of the composite molded metal casing of the present invention. The metal film is the film twist, and the coverage of the surface defect of the magnesium alloy
X :不佳 另一方面，如前所述鎂合金高溫高射 覆、縮陷、冷流紋、燒附、表面充填不良等^程所引發氣孔包 品質較差，致使經由後製程表面塗裝性不佳，靖，成型工件表面 生產良率低。同時， 200824832 對於夕卜觀用返冗麗需求的製程處理如陽極處理、電鑛處理等困難 ,加即便是施以塗裝處理，也經常需要先進行孔洞補土精研 等工序，既耗時又耗工。而鎂合金以傳統塗裝處理也難以直接呈 現金屬本質與金屬外觀的高貴質感。此類問題之解決，以本發明 所使用之冲壓輕金屬薄片作—被覆，得以有效地克服。此外，當 薄片厚度減少時，材料之剛性隨之降低。以本發明之實際驗證結 果，對於強度與_較佳的鈦合金及獨鋼而言，金屬薄膜厚度 S 0.006mm時仍然可以提供優良的缺陷覆蓋性；而對於銘合金則 需適度再增加金屬薄片的厚度，方可達到所需求之效用。誠然， • 肖一合金材料會因調質度的不同而影響其本質剛性。因此，為滿 足本發明所需求鎂合金表面缺陷之覆蓋性與銳角轉折密合性的雙 重放用冲整金屬薄片的合宜厚度絕非單一值。以本發明對於所 被覆-得輕金屬薄片之適用厚度範圍，訂定為議6mm至 0.12mm ° 由以上，本發明係在提供一種嶄新的金屬複合成型方式，藉 由結合鎂合金壓鑄或半_射出成型製輯生產之主結構框體， 以及鋁a i、鈦合金以及不銹鋼等異種金屬沖壓成型之表面處理 裝飾金屬薄片，來產製具有高強度、輕量化之金屬本質與優良亮 麗金屬外觀的機殼產品。本發明可以同時解決鎂合金成型工件表 面性質不佳，而板材沖壓成型工件造型變化侷限之缺點，來滿足 鎂合金工件於3C產品使用時所需具備的高強度、輕量化、散熱性X: Poor on the other hand, as mentioned above, the high-temperature high-temperature coating, shrinkage, cold flow pattern, burning, surface filling and other defects of the magnesium alloy cause poor quality of the stomata package, resulting in no surface coating properties through the post-process. Jia, Jing, the surface of the molded workpiece has a low yield. At the same time, 200824832 is difficult to process, such as anodizing and electro-mine processing, which is necessary for the processing of the cumbersome demand. Even if it is applied by painting, it is often necessary to perform the process of refining the hole first. It is also labor-intensive. Magnesium alloys are also difficult to directly exhibit the noble texture of metal and metal appearance by conventional coating treatment. The solution to such problems is effectively overcome by the stamping of the light metal foil used in the present invention. In addition, as the thickness of the sheet is reduced, the rigidity of the material is reduced. According to the actual verification result of the present invention, for the strength and the preferred titanium alloy and the single steel, the metal film thickness can still provide excellent defect coverage when the thickness is S 0.006 mm; and for the alloy, it is necessary to increase the metal foil moderately. The thickness can be used to achieve the desired effect. It is true that • Xiaoyi alloy materials will affect their inherent rigidity due to the difference in the degree of tempering. Therefore, the suitable thickness of the double-replacement metal foil for satisfying the coverage of the surface defects of the magnesium alloy and the acute-angle transition of the magnesium alloy required by the present invention is not a single value. In the present invention, the applicable thickness range of the coated-lightened metal foil is set to be 6 mm to 0.12 mm °. From the above, the present invention provides a novel metal composite molding method by combining magnesium alloy die casting or semi-ejection. The main structural frame produced by molding and production, and the surface-treated decorative metal foil of different metal stampings such as aluminum ai, titanium alloy and stainless steel, to produce a high strength, lightweight metal essence and a fine metallic appearance. product. The invention can simultaneously solve the defects of the surface properties of the magnesium alloy formed workpiece and the limitation of the shape change of the stamping forming workpiece, so as to meet the high strength, light weight and heat dissipation required for the magnesium alloy workpiece to be used in the 3C product.
佳、以及具備外觀多變化金屬質感呈現之需求。為不可多得之發 明，是為競爭激烈領域之明顯進步。 X 經由本發明之鎂合金主結構框體不獨適用於一般常用的 AZ91材質，同時也適用於AZ3卜AZ8卜AM5〇、AM6〇等與其 11 200824832 他驾用的鎂合金材質。工件的生產方式，無論是藉由全液態的壓 鑄成型或半固態的觸變成型等方式，亦都一體適用。對於最終被 覆固態沖壓成型異種金屬則可使用厚度等級在〇〇〇6_至 0.12mm範圍之鋁合金、鈦合金、不銹鋼等金屬薄片，作為機殼之 表面裝飾覆蓋層。 惟以上所述僅為本發明之較佳可行實施例，非因此即拘限本 务明之專利範圍’故舉凡應用本發明說明書及圖式内容所為之等 效結構變化’均同理皆包含於本發明之範圍内，以保障發明者之 權益，於此陳明。 【圖式簡單說明】 第一圖：為習知鎂合金產品製造方法步驟示意圖； 第二圖：為傳金屬板沖壓產品製造方法步驟示意圖； 第二圖：為本發明金屬複合成型製造方法實施例步驟示意圖之一。 第四圖：為本發明金屬複合成型製造方法實施例步驟示意圖之二。 第五圖：為本發明金屬複合成型製造方法，鎂合金基材與金屬薄 片覆蓋層結構之示意圖。 【主要元件符號說明】 (無） 十、申請專利範圍： 1、一種複合金屬機殼之製造法，其包含下列步驟： 12Good, and the need to have a variety of changes in the appearance of metal texture. For the rare invention, it is a significant improvement in the field of fierce competition. X The main structure frame of the magnesium alloy according to the present invention is not only suitable for the commonly used AZ91 material, but also applies to the magnesium alloy material of AZ3, AZ8, AM5, AM6, etc. and 11 200824832. The production method of the workpiece, whether by full-liquid die-casting or semi-solid thixoforming, is also applicable. For the final coated solid-state stamping dissimilar metal, a metal foil such as an aluminum alloy, a titanium alloy, or a stainless steel having a thickness grade of 〇〇〇6_ to 0.12 mm may be used as a surface decorative cover for the casing. However, the above description is only a preferred embodiment of the present invention, and thus the scope of the patents of the present invention is not limited thereto, and the equivalent structural changes of the present invention and the contents of the drawings are all included in the present invention. Within the scope of the invention, to protect the rights and interests of the inventors, Chen Ming. [Simple description of the drawings] The first figure is a schematic diagram of the steps of the manufacturing method of the conventional magnesium alloy product; the second figure is a schematic diagram of the steps of the manufacturing method of the metal plate stamping product; The second figure: the embodiment of the metal composite molding manufacturing method of the present invention One of the schematic diagrams. The fourth figure is the second schematic diagram of the steps of the embodiment of the metal composite molding manufacturing method of the present invention. Fig. 5 is a schematic view showing the structure of a metal composite molding method of the present invention, a magnesium alloy substrate and a metal foil covering layer structure. [Explanation of main component symbols] (None) X. Patent application scope: 1. A manufacturing method of a composite metal casing, which comprises the following steps: 12