558502 A7 B7 經濟部智慧財產局員工消費合作社印製 7 6 11twf. doc/0 0 6 五、發明說明（ρ 本發明是有關於一種板金件的印刷方法，且特別是 有關於一種應用於液晶螢幕背蓋的板金件印刷方法。 在諸多商品化的產品，包括電器用品、電子用品甚 至日常生活用品，除了功能上要求更便利、更人性化；在 空間應用上也力求輕薄短小，至於外觀上更是要求美觀、 富變化。而由於塑膠具有成形容易，可塑性高，重量輕盈 的優點，所以經常來做爲許多用品之外殻。以液晶蛮幕 (liquid crystal display, LCD)爲例，目前絕大部分均 以塑膠做爲外殼。然而塑膠雖製造容易，但是由於這些製 品的外型並不規則，若欲在塑膠製品表面上形成一些圖案 加以美化，卻十分複雜而困難。 習知在塑膠製品的曲面或凹面的表面，欲印製圖案 需透過移印、熱轉印，披覆或包覆膜的方式進行。然而這 些製法都有共同缺點，亦即良率低，製程繁瑣，並且容易 產生縐摺，而在轉印時網版不易定位，且套色困難，因此 應用於彩色或圖案較複雜的產品上十分困難。對於現今十 分熱絡的電子相關產品而言，比如一般個人電腦或筆記型 電腦而言，更是有朝向個人化造型設計的趨勢，因此諸多 液晶螢幕產品，或者套裝個人電腦產品都希望能具有獨特 的造型及色彩設計。然而對這些需求，目前的製程技術並 沒有較佳的解決之道，都面臨著高成本，低良率，造型色 彩受限的困境。 因此本發明的目的就是在提供一種板金件的印刷方 法，可以應用於液晶螢幕背蓋或個人電腦外殻等的製造， 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -- 言. 矣. (請先閱讀背面之注意事項再填寫本頁)558502 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 7 6 11twf. Doc / 0 0 6 V. Description of the invention (ρ This invention relates to a printing method for sheet metal parts, and in particular, it relates to an application to liquid crystal screens The printing method of the sheet metal parts of the back cover. In many commercialized products, including electrical appliances, electronic supplies and even daily necessities, in addition to functional requirements, it is more convenient and user-friendly; in terms of space applications, it also strives to be thin, short, and lighter. It is required to be beautiful and changeable. Because plastic has the advantages of easy forming, high plasticity, and light weight, it is often used as the shell of many supplies. Taking liquid crystal display (LCD) as an example, it is currently extremely large. Parts are made of plastic as the shell. However, although plastic is easy to manufacture, because of the irregular appearance of these products, it is very complicated and difficult to form some patterns on the surface of plastic products to beautify them. For curved or concave surfaces, the pattern to be printed must be printed by pad printing, thermal transfer, coating or coating. However, these manufacturing methods all have common disadvantages, that is, low yield, tedious process, and easy to produce creases, and the screen is difficult to locate during transfer, and the color registration is difficult, so it is very applicable to products with more complex colors or patterns. Difficult. For today's very hot electronics-related products, such as general personal computers or notebook computers, there is a trend towards personalized design. Therefore, many LCD screen products or packaged personal computer products are expected to Has a unique shape and color design. However, to these needs, the current process technology does not have a better solution, all face the dilemma of high cost, low yield, limited modeling color. Therefore, the purpose of the present invention is to Provide a printing method of sheet metal parts, which can be applied to the manufacture of LCD screen back cover or personal computer casing, etc. This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 mm)-language. 矣. ( (Please read the notes on the back before filling out this page)
558502 A7 B7 7611twf. do<c/006 五、發明說明（l) 得以在板金件上印製各種彩色圖案。 爲達成本發明之上述和其他目的，提出一種板金件 的印刷方法，可以應用於螢幕背蓋、電器外殼、金屬包裝 盒及電器防電磁輻射之外殼等。板金件的印刷方法包括： 首先提供一金屬板；進行一平版印刷步驟，在金屬板表面 印製一圖案。接著，貼附一保護膜於金屬板具有圖案之表 面；以及進行一沖壓抽型步驟，使金屬板抽型成所需外型， 以形成板金件。 依照本發明的一較佳實施例，其中在平版印刷步驟 之前，更包括進行一皮膜處理步驟，而皮膜處理步驟包括 噴砂處理或蝕花處理。另外，金屬板之材質包括鋁、鋁合 金、鋁鎂合金等；而保護膜之材質包括聚胺基甲酸酯 (polyurethane, PU)。對於較多色彩之圖案，平版印刷步 驟可以由多道印刷步驟來達成。 爲讓本發明之上述和其他目的、特徵、和優點能更 明顯易懂，下文特舉一較佳實施例，並配合所附圖式，作 詳細說明如下= 圖式之簡單說明： 第1圖繪示依照本發明一較佳實施例的一種液晶螢 幕的正面立體圖。 第2圖繪示對應第1圖之液晶螢幕之背面立體圖。 第3圖繪示本發明一較佳實施例的一種液晶背蓋的 製造流程圖。 圖式之標示說明： 4 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) — — — — — — — ·11111111 . 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作社印製 558502 五、發明說明（>) 100 :液晶螢幕 102 :液晶面板 104 :前外殼 106 :後外殼 108 :按鈕 110 :底座 112 :散熱孔 114 :液晶營幕背盍 116 :圖案 200、202、204、206、208、210 ·•製造步驟 實施例 本發明在於揭露一板金件的印刷技術，可在表面非 平整的板金件表面，印製各種色彩之圖案，其應用範圍極 廣，包括螢幕背蓋、電器外殻、電腦機殼、金屬包裝盒及 電器防電磁輻射之外殻等。本實施例僅以液晶螢幕背蓋爲 例作爲說明，然熟習該項技術者應知本實施例所揭露之技 術，可以沿用於其他板金件。習知液晶螢幕皆是以塑膠做 爲外殼之材質，而其背蓋通常具有多個散熱孔，爲不規則 的表面，因此不易進行印刷，通常只是單調的單色表面。 請同時參照第1圖及第2圖，其中第1圖繪示依照 本發明一較佳實施例的一種液晶螢幕的正面立體圖；而第 2圖繪示對應之液晶螢幕之背面立體圖。液晶螢幕100(LCD monitor)主要由液晶面板l〇2(LCD panel)所構成，其由前 外殻 104(front housing)及後外殼 106(back housing)所 5 (請先閱讀背面之注音？事項再填寫本頁) - -·線· 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 558502 A7 6lltwf.doc/006 五、發明說明（％ ) 包覆。其中前外殼104除了暴露出液晶面板丨〇2的顯示區 域外，還包括數個調控按鈕1〇8(butt〇n)，用以調控螢幕 売度、對比等設定値，或者還配置有音孔（未繪示），作爲 聲音之輸出。而後外殼1〇6則包括多個散熱孔112，其可 以爲如圖不之槽孔狀’或者圓孔狀。通常前外殼1〇4及後 外殼106的材質皆爲塑膠，由於後外殻1〇6的表面具有散 熱孔112且比需容納部分線路，所以爲不規則狀，不易印 製圖案，不成提供美觀的外表。前外殼1〇4、後外殻1〇6 連同液晶面板102則固定於底座u〇上。本發明的液晶螢 幕背蓋114則覆蓋在後外彀ι〇6的外部，其表面具有美觀 的圖案116，使液晶螢幕1〇〇具有美背的外型設計。 然而，要達成上述美背設計，本發明提出一種液晶 營幕背蓋的製造方法。請_第3圖，漏示本發明一較 佳實施例的-麵晶錢_造流程圖。本發明的液晶營 幕背蓋是以金屬板加工構成，所以首先提供—金屬板作爲 基材’如步驟所7K。其巾金腕的機雖是銘或銘 合金’麵亦可以是其他金屬。接著，可以選擇性進行一 皮膜處理步，驟驟2〇2所示，亦即對金屬板欲印製圖 案的麵依所而射？表耐D工，比如鈾花翻砂處理，使 得後酬酸顚健故麵感。⑽，此賴麵步 驟可依需要·_行，抑以规此步驟，龍以光滑 之金屬板表面進行後續印刷步驟。 然後’進行金屬板的平版印刷，如步驟·所示。 由於現階段的金屬板呈平面狀態，十分適合進行平版印 本紙張尺度適用中國國豕標準（CNS)A4規格（21〇 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) ------—訂-----— I — . 經濟部智慧財產局員工消費合作社印製 558502 五、發明說明（f) 刷，直接以印刷方式在金屬板表面印製圖案，若選用的圖 案爲彩色，則可以藉由多道平版印刷步驟達成，比如分爲 紅、藍、黃三色平版印刷，然後經過套色可獲得多種色彩 的圖案。一般係針對所欲印製之圖案，先進行分色，依所 需色彩的變化分爲三色或五色，甚至更多，然後分別製作 各色之印刷平版，再進行套色印刷，即可獲得繽紛的彩色 圖案。由於平版印刷在套色上可以控制十分精準，因此良 率極高，而且製版及印刷速度極快，成本低，十分適合量 產；而由於分色、製版及套色所花時間極短，對於多樣化 的小量生產也十分合適。 再來，在已印製好圖案的金屬表面可選擇性貼上一 保護膜，如步驟206所示，保護膜之材質比如是聚胺基甲 酸酯（ployurethane, PU)，或其他有機薄膜，其目的在於 保護已印製好之圖案於後續製程中不致遭到破壞。當然， 此步驟可配合平版印刷的結果及模具的設計，來決定是否 需要此層保護膜，因此貼保護膜的步驟是可以省略的。然 後’進行沖壓抽型步驟，如步驟208所示，將金屬板抽型 成一液晶螢幕背蓋所需的形狀，即獲得成品，如步驟210 所示。其中沖壓抽型依照外型的複雜程度，可以一道或多 道模具進行沖壓抽型，同時亦可以形成所需的組裝孔洞， 比如固定螺孔等。另外，在平版印刷步驟中套色所需的定 位點’亦可以作爲沖壓抽型時的定位點，這樣更可以確保 成品的良率。 雖然上述實施例係以液晶螢幕背蓋爲例作爲說明， 7 本紙張尺度適用中画國家標準（CNS)A4規格（2】〇 X 297公爱) -------------___ (請先閱讀背面之注意事項再填寫本頁) · --線· 經濟部智慧財產局員工消費合作社印製 558502 7611twf.doc/006 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明說明（έ ) 然而熟習該技術者應知，本發明所揭露之技術可以應用於 各種板金件，其材質包括鋁、鋁合金或鋁鎂合金等金屬材 質，而其應用產品範圍也很廣，包括螢幕背蓋、電器外殼、 電腦機殼、金屬包裝盒及電器防電磁輻射（EMI)之外殼等。 藉由本發明提出的製造方法，可以提供相關產品更多樣化 的外觀設計，而且確保高良率的產質。 綜上所述，本發明至少具有下列優點： 1. 依照本發明的製造方法，可以在板金件成型前， 進行平版印刷，改善了板型工件印製圖案的加工性，同時 所採用的平版印刷，可以提高產品良率，降低成本，並提 供極佳的量產性。 2. 依照本發明的製造方法，在金屬板印製完圖案 後，貼附保護膜再進行沖壓抽型，不但可以確保印製之圖 案不遭受破壞，且可以應用於各種外型之板金件。 3. 依照本發明對於多種產品外殼，提供一種可以多 樣化設計的製程技術，使得未來個人化造型設計趨勢的需 求，得到解決。 雖然本發明已以一較佳實施例揭露如上，然其並非 用以限定本發明，任何熟習此技藝者，在不脫離本發明之 精神和範圍內，當可作些許之更動與潤飾，因此本發明之 保護範圍當視後附之申請專利範圍所界定者爲準。558502 A7 B7 7611twf. Do < c / 006 V. Description of the invention (l) A variety of color patterns can be printed on sheet metal parts. In order to achieve the above and other objects of the present invention, a printing method for sheet metal parts is proposed, which can be applied to screen back covers, electrical appliances casings, metal packaging boxes, and electrical appliances' electromagnetic radiation-resistant casings. The method for printing sheet metal parts includes: first providing a metal plate; performing a lithographic printing step, and printing a pattern on the surface of the metal plate. Next, a protective film is attached to the patterned surface of the metal plate; and a stamping step is performed to form the metal plate into a desired shape to form a sheet metal part. According to a preferred embodiment of the present invention, before the lithographic printing step, a film processing step is further included, and the film processing step includes sandblasting or etching. In addition, the material of the metal plate includes aluminum, aluminum alloy, aluminum-magnesium alloy, and the like, and the material of the protective film includes polyurethane (PU). For more colorful patterns, the lithographic step can be achieved by multiple printing steps. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is exemplified below, and in conjunction with the accompanying drawings, the detailed description is as follows = Brief description of the drawings: FIG. 1 A front perspective view of a liquid crystal screen according to a preferred embodiment of the present invention is shown. Figure 2 shows a perspective view of the back of the LCD screen corresponding to Figure 1. FIG. 3 is a flowchart of manufacturing a liquid crystal back cover according to a preferred embodiment of the present invention. Description of the drawings: 4 This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page) — — — — — — — · 11111111. Economy Printed by the Consumer Cooperatives of the Ministry of Intellectual Property Bureau Printed by the Consumer Cooperatives of the Ministry of Economics and Intellectual Property Bureau of the Ministry of Economic Affairs Printed 558502 V. Description of the invention 100: LCD screen 102: LCD panel 104: Front case 106: Rear case 108: Button 110: Base 112: heat dissipation hole 114: LCD screen curtain back 116: pattern 200, 202, 204, 206, 208, 210 · Manufacturing process examples The present invention is to expose a printing technique for a sheet metal part, which can be a non-flat sheet metal part. The surface is printed with a variety of color patterns, which can be used in a wide range of applications, including screen backs, electrical enclosures, computer cases, metal packaging boxes, and electrical enclosures for electromagnetic radiation. This embodiment only uses the LCD back cover as an example, but those skilled in the art should know that the technology disclosed in this embodiment can be used for other sheet metal parts. It is known that LCD screens are made of plastic as the material of the casing, and the back cover usually has a plurality of heat dissipation holes, which is an irregular surface, so it is not easy to print, and it is usually a monotonous monochromatic surface. Please refer to FIG. 1 and FIG. 2 at the same time, wherein FIG. 1 shows a front perspective view of a liquid crystal screen according to a preferred embodiment of the present invention; and FIG. 2 shows a rear perspective view of a corresponding LCD screen. The LCD monitor 100 (LCD monitor) is mainly composed of a liquid crystal panel 102 (LCD panel), which is composed of a front housing 104 (front housing) and a rear housing 106 (back housing) 5 (please read the note on the back first? Matters (Fill in this page again)--· Line · This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm) 558502 A7 6lltwf.doc / 006 5. Description of the invention (%). In addition to exposing the display area of the LCD panel 〇〇2, the front case 104 also includes a number of control buttons 108 (button) to adjust the settings of the screen, contrast, etc., or it is also equipped with a sound hole (Not shown), as the sound output. The rear case 106 includes a plurality of heat dissipation holes 112, which may be slot-shaped or circular-hole-shaped as shown in the figure. Generally, the material of the front case 104 and the rear case 106 are plastic. Since the surface of the rear case 106 has heat dissipation holes 112 and is more than necessary to accommodate part of the circuit, it is irregular, it is not easy to print patterns, and it cannot provide beauty. Appearance. The front case 104 and the rear case 106 together with the liquid crystal panel 102 are fixed on the base u0. The back cover 114 of the liquid crystal screen of the present invention covers the outside of the rear outer casing 6 and has a beautiful pattern 116 on the surface, so that the liquid crystal screen 100 has a beautiful design. However, in order to achieve the above-mentioned beautiful back design, the present invention proposes a method for manufacturing a LCD screen back cover. Please refer to FIG. 3, which shows a flow chart of the fabrication process of a preferred embodiment of the present invention. The liquid crystal display back cover of the present invention is formed by processing a metal plate, so firstly, a metal plate is provided as a substrate 'as shown in step 7K. Although the machine of the gold wristband is an inscription or an inscription alloy 'surface, it can also be other metals. Then, a film processing step can be selectively performed, as shown in step 202, that is, the surface of the metal plate to be printed is shot according to what you want? The surface resistance to D, such as uranium flower sanding treatment, makes the postpaid acid feel healthy. Alas, this face-up step can be performed as needed. In order to comply with this step, Long uses the smooth metal plate surface for subsequent printing steps. Then, lithographic printing of the metal plate is performed as shown in step ·. Since the metal plate is flat at this stage, it is very suitable for lithographic printing. The paper size is applicable to the Chinese National Standard (CNS) A4 (21〇X 297 mm) (Please read the precautions on the back before filling this page)- ----— Order -----— I —. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 558502 5. Description of the invention (f) Brush, print the pattern directly on the surface of the metal plate by printing. The pattern is colored, which can be achieved through multiple lithographic steps, such as red, blue, and yellow three-color lithographic printing, and then a variety of colors can be obtained through color registration. Generally, according to the pattern you want to print, color separation is performed first, and it is divided into three or five colors, or even more according to the change of the desired color. Then, each color printing lithography is made separately, and then the color printing is performed to obtain colorful. Color pattern. Because lithography can be controlled very accurately in register, the yield is very high, and the platemaking and printing speed is very fast, and the cost is low, which is very suitable for mass production; and because of the short time spent in color separation, platemaking and registering, The small-scale production is also very suitable. Furthermore, a protective film may be selectively pasted on the printed metal surface. As shown in step 206, the material of the protective film is, for example, polyurethane (PU), or other organic films. The purpose is to protect the printed pattern from being damaged in subsequent processes. Of course, this step can be combined with the results of lithography and the design of the mold to determine whether this layer of protective film is needed, so the step of applying a protective film can be omitted. Then, a stamping and drawing step is performed. As shown in step 208, the metal plate is drawn into a desired shape of the LCD screen back cover to obtain a finished product, as shown in step 210. The stamping and drawing according to the complexity of the shape, one or more dies can be used for stamping and drawing, and the required assembly holes can also be formed, such as fixed screw holes. In addition, the positioning point 'required for color registration in the lithographic printing step can also be used as a positioning point when punching and drawing, which can further ensure the yield of the finished product. Although the above embodiment is described by taking the back cover of the LCD screen as an example, 7 paper sizes are applicable to the Chinese Painting National Standard (CNS) A4 specification (2) × X 297 public love) ------------ -___ (Please read the notes on the back before filling in this page) ·-· Printed by the Employees 'Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 558502 7611twf.doc / 006 A7 B7 Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Description of the invention (Hand) However, those skilled in the art should know that the technology disclosed in the present invention can be applied to various sheet metal parts, the material of which includes aluminum, aluminum alloy or aluminum-magnesium alloy, and its application product range is also very wide, Including screen back cover, electrical enclosure, computer case, metal packaging box and electrical electromagnetic radiation (EMI) enclosure, etc. With the manufacturing method proposed by the present invention, it is possible to provide a more diverse design of related products, and to ensure a high-yield production quality. In summary, the present invention has at least the following advantages: 1. According to the manufacturing method of the present invention, lithographic printing can be performed before sheet metal parts are formed, which improves the processability of the printed pattern of the plate-shaped workpiece, and the lithographic printing used at the same time , Can improve product yield, reduce costs, and provide excellent mass productivity. 2. According to the manufacturing method of the present invention, after the pattern is printed on the metal plate, a protective film is attached and then punched out, which can not only ensure that the printed pattern is not damaged, but also can be applied to sheet metal parts of various shapes. 3. According to the present invention, for a variety of product shells, a process technology that can be designed in a variety of ways is provided, so that the needs of future personalization design trends can be solved. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and retouching without departing from the spirit and scope of the present invention. The scope of protection of the invention shall be determined by the scope of the attached patent application.
X 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) # — II---—訂----I! ·線·X This paper size applies to China National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page) # — II ---— Order ---- I! · Line ·