200914241 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種模内射出成型方法，特別是指一 種能有效減少成品表面發生龜裂現象之模内裝飾射出成型 方法。 【先前技術】 所《月換内裝飾射出成型（decoration IMD )，疋將油墨顏料塗佈或印刷於一可透光的塑膠薄膜上 ，之後在油墨圖案表面塗佈強化材料，並照射紫外線光 (UV)或電子束（EB)，以使強化材料硬化而製成一強化層， 此強化層的作用主要是在於保護油墨圖案不會在射出成型 過程中因液態塑料的衝擊而變形移位，再於強化層上塗佈 接著?ιΐ ϋ以增加在射出成型過程中液態塑料與塑膠薄膜 間的結合力，並將塑膠薄膜定型並置入模具内進行模内射 出成：，以使塑料與塑膠薄膜結合，且塑料凝固為成品後 成。:表面由於塑膠薄膜之油墨顏料而顯現出既定的圖形 或色彩’藉此達到對塑料成品㈣『裝飾』之效果，此類 励成品現今最常被應用於如手機或筆記 置之外殼。 团于电卞裝 然而因塑膠薄膜於置入模具前，必須配合 做弩曲，此時經常因強# 、 /狀 Μ 5$化層過；，致使油墨 產生龜裂現象，因而增加產品外觀之不良率，降低 觀質感，除此之外，若欲產生 降低產。。外 你ra丄曰· 俅化之圖开》，則勢必亜 使用大買油墨顏料才能達成，若此時所製作中」要 了 WI作出的成品又有 200914241 上述外觀瑕麻良率不高的問題，如此不但會造成生產成本 的增加，且油墨顏料的大量使用也會對環境造成污染。 【發明内容】 因此，本發明之目的，即在提彳妓__ _ 1 I仳捉仏種能有效減少表面 發生龜裂現象，降低成品不良率及诘小 个艮+及减少裱境污染之模内裝 飾射出成型方法。 於是，本發明模内裝飾射出成型方法，包括有： U)備置-透明薄膜，該薄膜具有_第_表面與一第二 表面，於該薄膜的第二表面上印刷圖案而構成一圖案層； (b )使該薄膜形成一預定形狀； (c) 於該薄膜的圖案層設置一強化層； (d) 於該薄膜的圖案層及強 化層表面塗佈黏膠以構成一 接著層； (e) 將該薄膜置入一射屮点 射出成型模具内，該射出成型模具 -有此料if H專膜的該強化層並朝向該澆料 道；以及 ⑴經由該淹料道將液態塑料注入該模具中，以製得一 表面為具有該圖案的塑料成品。 本發明藉由該薄膜先形成預 风預疋开y狀，且只在薄膜對應 到澆料道的位置處設置強彳卜爲 拙吐议〇 因而可避免於進行深度拉 申時七生龜裂現象，有效達到 口 】降低成u口不良率，及減少環 境3染等之功效。 【實施方式】 有關本發明之前述及1U Μ 他技術内谷、特點與功效，在 200914241 以下配5參考圖式之一較佳實施例的詳細說明甲，將可清 楚的呈現。 ' 參閱圖1，是本發明模内裝飾射出成型方法之一較佳實 施例，包括有以下步驟： 步驟11如圖1、2所示，是先備置一透明的薄膜21 ’此薄膜21的材質不限，只要是能適用於模内射出成型的 材質均可，例如塑膠或鎂鋁合金薄片等。此薄膜21具有一 第一表面211與一第二表面212，於薄膜的第二表面212上 印刷圖案而構成-圖案層213，此圖案可以是平面圖案、扣 立體圖案、色彩 '線條紋路等。 步驟12，如圖1、3所示，將薄膜21周圍彎折處理以 形成一預定形狀，此形狀並與薄膜21所欲置入之一射出成 型模具3的模穴31(見圖4所示，容後詳述）形狀相對應， 且薄膜21之圖案層213是位於内側。 步驟13，如圖1、3、4所示，是於接著層22表面對應 於澆料道321處設置一強化層22，此強化層22是藉貼附雙 面膠帶而形成，所述雙面膠帶可以是塑膠材質或紙類材質 或金屬材質。 步驟14，如圖1、4所示，接著於薄膜21之圖案層 213及強化層22表面塗佈黏膠以構成一接著層23，所述黏 膠的材質是採用混合液加架橋劑，但也可使用如硬化劑、 熱溶膠、熱溶膠膜專或上述之組合。 步驟15，如圖1、3、4所示，將已彎折成預定形狀之 薄膜21置入所述射出成型模具3的模穴31中，此射出成 200914241 型模具3具有-上模32及能與上模32對應閉合之下模33 ’上、下模32、33閉合後即於内部共同界定出前述模穴31 ，而薄膜21即位於下模33位置處的模穴31中；另外，上 模32上並設有-練道32卜^上、下模犯、33閉合後 ，該洗料道321並能與模穴 膜21是以該圖案層213上的 31連通。要特別說明的是，薄 強化層22朝向該澆料道321， 且所述強化層22並非全面覆置于該圖案層213上而是只 有在該圖案層213對應到該洗料冑321的部份才設置強化 層22 ’且強化層22的面積要較該淹料道321的開口區域面 積略大。 步驟16,如圖卜4、5所示，閉合上、下模犯、33後 ’即可經由該洗料道321將液態塑料41注人該射出成型模 具3之模穴33進行射出成型’以製得一表面為具有圖案的 塑料成品42。如圖6所示，待液態塑料41凝固後，便可取 出該塑料成品42。該塑料成品42具有一塑料層42卜及披 覆於該塑料層421之-側表面的薄膜21，薄膜21之圖案層 213與塑料層421之間為接著層23，且圖案層213局部區 域與接著層23間為強化層22,如此薄膜21之圖案層a” 將於塑料層421表面呈現出圖案花樣。 本發明模内射出成型方法所製成之成品可以應用於手 機外成、筆g型電腦外殼、個人數位助理（pDA)外殼等電子 裝置，或是其他以射出成型方式製成之器具、用品。 歸納上述，本發明模内裝飾射出成型方法藉由將已印 刷有圖案之賴21先形成預定形狀，且僅在薄膜21局部 200914241 位置設置強化層22,再於圖案層213及強化層22表面成型 接著層23後’置入射出成型模具3中進行射出成型作業， 即可避免習知於進行深度拉伸以使該薄膜成型預定形狀時 發生強化層龜裂現象，有效達到降低成品不良率，及減少 環境污染等之功效。 〜 惟以上所述者’僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆應 仍屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是本發明模内裝飾射出成型方法一較佳實施例之 方塊流程圖； 圖2是該較佳實施例之一放大示意圖，說明薄膜上印 製有一圖案層； 圖3疋s亥較佳實施例之另一放大示意圖，說明已印刷 有圖案之薄膜的彎折態樣； 圖4是該較佳實施例於射出成型時之組合剖面放大示 意圖’說明薄膜置於模穴内且上、下模閉合時之態樣； 圖5是該較佳實施例之另一組合剖面放大示意圖，說 明液態塑料已經由模具上的洗料道注入模穴内之態樣；及 圖6是該較佳實施例之方法所製成之成品刳面放大示 意圖。 200914241 【主要元件符號說明】 3射出成型模具 11薄膜上設置一圖案層 13使薄膜置入模具内 15成型強化層 1 7成品 22強化層 31模穴 33下模 211第一表面 212第二表面 421塑料層 12使薄膜形成預定形狀 14塗佈接著層 16模内射出成型 21薄膜 23接著層 32上模 42塑料成品 213圖案層 321澆料道 10BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-mold injection molding method, and more particularly to an in-mold decorative injection molding method which can effectively reduce cracking of a finished surface. [Prior Art] The "monthly change decoration IMD" is used to coat or print an ink pigment on a light transmissive plastic film, and then apply a reinforcing material to the surface of the ink pattern and irradiate the ultraviolet light ( UV) or electron beam (EB) to harden the reinforcing material to form a strengthening layer. The reinforcing layer functions mainly to protect the ink pattern from deformation and displacement during the injection molding process due to the impact of the liquid plastic. Applying the adhesive layer on the reinforcing layer to increase the bonding force between the liquid plastic and the plastic film during the injection molding process, and shaping the plastic film into the mold to be injected into the mold to: plastic and plastic film Combined, and the plastic is solidified into a finished product. : The surface exhibits a certain pattern or color due to the ink pigment of the plastic film, thereby achieving the effect of the "decoration" of the finished plastic product (4), which is nowadays most commonly used in outer casings such as mobile phones or notebooks. The group is installed in the electric raft. However, the plastic film must be twisted before being placed in the mold. At this time, it is often caused by the strong #, / Μ Μ 5# layer, which causes the ink to crack, thus increasing the appearance of the product. The rate of non-performing, lowering the texture, in addition to this, if you want to reduce production. . Outside of your ra丄曰· 俅化图开》, it is bound to use the big buy ink pigments to achieve, if at this time the production of WI made the finished product and 200914241 the above appearance ramie yield is not high This will not only increase the production cost, but also cause a lot of pollution of the environment due to the large use of ink pigments. SUMMARY OF THE INVENTION Therefore, the object of the present invention is to effectively reduce the surface cracking phenomenon, reduce the defective rate of the finished product, reduce the defect rate of the finished product, and reduce the pollution of the environment in the 彳妓__ _ 1 I. In-mold decorative injection molding method. Thus, the in-mold decorative injection molding method of the present invention comprises: U) preparing a transparent film having a first surface and a second surface, and printing a pattern on the second surface of the film to form a pattern layer; (b) forming the film into a predetermined shape; (c) providing a reinforcing layer on the pattern layer of the film; (d) coating the surface of the pattern layer and the reinforcing layer of the film to form an adhesive layer; Placing the film into a shot spot injection molding mold having the reinforcement layer of the material and facing the gate; and (1) injecting the liquid plastic through the flood passage In the mold, a surface is prepared as a finished plastic product having the pattern. The invention adopts the film to form a pre-wind pre-opening y shape, and only provides a strong 彳 拙 在 在 位置 位置 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 七 七 七 七 七 七 七 七 七 七 七 七 七 七 七 七, effectively reach the mouth] reduce the rate of unsuccessful u mouth, and reduce the effect of environmental 3 dyeing. [Embodiment] A detailed description of a preferred embodiment of a preferred embodiment of the present invention with reference to the above-mentioned and 1U 本Technologies of the present invention will be clearly presented below. Referring to Fig. 1, a preferred embodiment of the in-mold decorative injection molding method of the present invention comprises the following steps: Step 11 is as shown in Figs. 1 and 2, and a transparent film 21 is prepared. Not limited to any material that can be applied to in-mold injection molding, such as plastic or magnesium alloy sheets. The film 21 has a first surface 211 and a second surface 212, and a pattern is printed on the second surface 212 of the film to form a pattern layer 213. The pattern may be a planar pattern, a buckled three-dimensional pattern, a color 'line stripe path, or the like. Step 12, as shown in Figs. 1 and 3, the film 21 is bent around to form a predetermined shape, and the film 21 is intended to be inserted into a cavity 31 of the injection molding die 3 (see Fig. 4). The details are corresponding to each other, and the pattern layer 213 of the film 21 is located on the inner side. As shown in FIG. 1 , FIG. 3 and FIG. 4 , a reinforcing layer 22 is formed on the surface of the adhesive layer 22 corresponding to the casting channel 321 . The reinforcing layer 22 is formed by attaching a double-sided tape. The tape can be made of plastic or paper or metal. Step 14, as shown in FIG. 1 and FIG. 4, the adhesive layer is applied to the surface of the pattern layer 213 and the reinforcing layer 22 of the film 21 to form an adhesive layer. The adhesive is made of a mixed solution and a bridging agent. It is also possible to use, for example, a hardener, a hot melt, a hot melt film or a combination thereof. Step 15, as shown in FIGS. 1, 3, and 4, the film 21 that has been bent into a predetermined shape is placed in the cavity 31 of the injection molding die 3, and the injection into the 200914241 mold 3 has an upper die 32 and The upper mold 33 can be closed corresponding to the upper mold 32. The upper and lower molds 32, 33 are closed to define the cavity 31 internally, and the film 21 is located in the cavity 31 at the position of the lower mold 33; The upper die 32 is provided with a training channel 32, an upper die, and a 33 closing. The washing lane 321 can communicate with the cavity film 21 on the pattern layer 213. It is to be noted that the thin reinforcing layer 22 faces the casting channel 321, and the reinforcing layer 22 is not entirely overlaid on the pattern layer 213 but only the portion of the pattern layer 213 corresponding to the cleaning crucible 321 The reinforcing layer 22' is disposed in portions and the area of the reinforcing layer 22 is slightly larger than the area of the opening area of the flooding path 321 . Step 16, as shown in Figures 4 and 5, closing the upper and lower molds, and then after 33, the liquid plastic 41 can be injected into the cavity 33 of the injection molding die 3 through the washing lane 321 to be injection molded. A finished plastic product 42 having a pattern is produced. As shown in Fig. 6, after the liquid plastic 41 is solidified, the finished plastic product 42 can be taken out. The plastic product 42 has a plastic layer 42 and a film 21 coated on the side surface of the plastic layer 421. The pattern layer 213 of the film 21 and the plastic layer 421 are an adhesive layer 23, and the pattern layer 213 is partially and partially Then, the layer 23 is a strengthening layer 22, so that the pattern layer a" of the film 21 will present a pattern on the surface of the plastic layer 421. The finished product formed by the in-mold injection molding method of the invention can be applied to a mobile phone, a pen type g Electronic devices such as computer casings, personal digital assistants (pDA) casings, or other instruments and articles made by injection molding. In summary, the in-mold decorative injection molding method of the present invention uses the pattern to be printed first. The predetermined shape is formed, and only the reinforcing layer 22 is disposed at the position of the film 21 at the portion 200914241, and after the bonding layer 23 is formed on the surface of the pattern layer 213 and the reinforcing layer 22, the injection molding operation is performed in the injection molding die 3, thereby avoiding the conventional knowledge. When the deep drawing is performed to form the film into a predetermined shape, the cracking of the reinforcing layer occurs, and the effect of reducing the defective rate of the finished product and reducing environmental pollution is effectively achieved. The present invention is only a preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention should still be BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block flow diagram of a preferred embodiment of the in-mold decorative injection molding method of the present invention; FIG. 2 is an enlarged schematic view of the preferred embodiment, illustrating a film A pattern layer is printed on the top; FIG. 3 is another enlarged view of the preferred embodiment of the embodiment, illustrating a bent state of the printed film; FIG. 4 is a combined cross section of the preferred embodiment during injection molding. The enlarged schematic view 'describes the state in which the film is placed in the cavity and the upper and lower molds are closed; FIG. 5 is an enlarged cross-sectional view showing another combination of the preferred embodiment, illustrating that the liquid plastic has been injected into the cavity by the washing lane on the mold. Figure 6 is an enlarged schematic view of the finished side of the finished method. 200914241 [Main component symbol description] 3 injection molding die 11 film setting A pattern layer 13 allows the film to be placed in the mold 15 to form a strengthening layer 1 7 finished product 22 reinforcing layer 31 cavity 33 lower mold 211 first surface 212 second surface 421 plastic layer 12 to form a film into a predetermined shape 14 coated layer 16 mode Inner injection molding 21 film 23 followed by layer 32 upper mold 42 plastic finished product 213 pattern layer 321 pouring channel 10