201119754 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種喷塗方法。 【先前技術】 [0002] 一般消費型電子產品如行動電話或電腦等外殼通常進行 外表面之塗裝以達到美化外殼之裝飾目的。喷塗時，油 漆或油墨喷塗於工件表面，溶劑揮發後形成塗膜。工件 烘乾時，必須保持喷塗面大體水準烘烤以防止傾斜放置 _ 時上方之塗膜向下移動，使塗膜下邊緣厚，然而片狀工 〇 件水準放置烘烤使烘箱每層放置之工件量較少，烘烤成 本較高。 【發明内容】 [0003] 有鑑於此，有必要提供一種烘烤成本較低之喷塗方法。 [0004] 一種喷塗方法，包括以下步驟： [0005] 提供一工件，該工件具有待喷塗面； Q [0006] 喷塗，將黏度為lcP〜8cP之液態塗料喷塗至工件之表面； [0007] 高溫預烘烤，將工件置於50°C〜80°C之溫度條件下烘烤10 秒至90秒； [0008] 低溫預烘烤，將工件置於30°C〜50°C之溫度條件下烘烤1 分鐘至4分鐘，烘烤過程中工件喷塗面之傾斜度在20度以 内； [0009] 高溫烘乾，將工件置於50°C〜80°C之溫度條件下烘烤5分 鐘至15分鐘。 098142422 表單編號A0101 第3頁/共14頁 0982072826-0 201119754 [0010] 高溫預烘烤可以快速除去喷塗液態塗料中部分溶劑，降 低塗膜流動性。高溫預烘烤時間較短，能夠能避免高溫 時塗膜中溶劑與工件之表面發生反應而腐蝕工件。低溫 預烘烤可以可緩慢除去喷塗液態塗料中部分溶劑。低溫 預烘烤時塗膜具有一定流動性，同時溶劑之揮發速率較 小，使得當溶劑揮發後，塗膜可以可流動至溶劑揮發所 形成之空穴中，從而避免烘烤時由於溶劑蒸發過快而形 成針孔等缺陷。高溫烘乾可以可徹底除去塗膜中之溶劑 使工件表面之塗膜完全幹透。高溫預烘烤、低溫預烘烤201119754 VI. Description of the Invention: [Technical Field to Which the Invention Is Ascribed] [0001] The present invention relates to a spraying method. [Prior Art] [0002] A general consumer electronic product such as a mobile phone or a computer is usually coated with an outer surface to beautify the outer casing. When spraying, the paint or ink is sprayed on the surface of the workpiece, and the solvent evaporates to form a coating film. When the workpiece is dried, the sprayed surface must be kept at a high level to prevent tilting. When the upper coating film moves downward, the lower edge of the coating film is thick. However, the sheet-like workpiece is placed at a level to be baked to place the oven on each layer. The amount of workpiece is small and the baking cost is high. SUMMARY OF THE INVENTION [0003] In view of the above, it is necessary to provide a spraying method with a lower baking cost. [0004] A spraying method comprising the following steps: [0005] providing a workpiece having a surface to be sprayed; Q [0006] spraying, spraying a liquid coating having a viscosity of lcP~8cP onto the surface of the workpiece; [0007] high temperature prebaking, the workpiece is baked at a temperature of 50 ° C ~ 80 ° C for 10 seconds to 90 seconds; [0008] low temperature prebaking, the workpiece is placed at 30 ° C ~ 50 ° C Baking for 1 minute to 4 minutes under temperature conditions, the inclination of the sprayed surface of the workpiece during baking is within 20 degrees; [0009] Drying at high temperature, placing the workpiece at a temperature of 50 ° C to 80 ° C Bake for 5 minutes to 15 minutes. 098142422 Form No. A0101 Page 3 of 14 0982072826-0 201119754 [0010] High temperature prebaking can quickly remove some of the solvent from the sprayed liquid coating and reduce the fluidity of the film. The high-temperature pre-baking time is short, which can avoid the reaction of the solvent in the coating film with the surface of the workpiece at high temperature to corrode the workpiece. Low temperature prebaking can slowly remove some of the solvent from the sprayed liquid coating. When the film is pre-baked at a low temperature, the coating film has a certain fluidity, and the evaporation rate of the solvent is small, so that when the solvent is volatilized, the coating film can flow to the cavity formed by the evaporation of the solvent, thereby avoiding evaporation of the solvent during baking. Quickly form defects such as pinholes. High-temperature drying can completely remove the solvent in the coating film to completely dry the coating film on the surface of the workpiece. High temperature prebaking, low temperature prebaking
I 與高溫烘乾三個步驟配合使喷塗之塗膜厚度均勻且不易 形成針孔等缺陷。同時，高溫預烘烤降低塗膜之流動性 ，使低溫預烘烤時工件傾斜度小於二十度之範圍内即可 進行，高溫烘乾時工件可以可以更大傾斜角度擺放，從 而提高烘烤設備之利用率，降低烘烤成本。 【實施方式】 [0011] [0012] [0013] [0014]I cooperate with the high-temperature drying process to make the coating film thickness uniform and difficult to form pinholes and other defects. At the same time, the high-temperature pre-baking reduces the fluidity of the coating film, so that the workpiece inclination can be performed within a range of less than 20 degrees during the low-temperature prebaking, and the workpiece can be placed at a larger inclination angle during the high-temperature drying, thereby improving the baking. The utilization rate of baking equipment reduces the cost of baking. Embodiments [0011] [0014] [0014]
下面結合實施方式對本發明之噴塗方法作進一步詳細說 明。 I 實施例一：一種喷塗方法，包括以下步驟： 步驟一，提供一工件，該工件具有待噴塗面。 步驟二，噴塗，將黏度為lcP之液態塗料喷塗至工件之待 喷塗面以形成厚度為5 /z m-60 // m塗膜。本實施例中，液 癌塗料為丙稀酸塗料’液態塗料之溶劑為四氣°夫喃’丙 酮，乙酸甲酯，純乙酸甲酯，乙酸乙酯，丁酮，乙酸異The spraying method of the present invention will be further described in detail below in conjunction with the embodiments. I. Embodiment 1 A spraying method comprising the following steps: Step one, providing a workpiece having a surface to be sprayed. Step 2, spraying, spraying a liquid paint having a viscosity of lcP onto the surface to be sprayed of the workpiece to form a coating film having a thickness of 5 /z m - 60 / m. In this embodiment, the liquid cancer coating is an acrylic acid coating. The solvent of the liquid coating is tetrahydrofuran ketone, methyl acetate, pure methyl acetate, ethyl acetate, methyl ethyl ketone, and acetic acid.
丙酯，曱基正丙酮，正乙酸丙酯，曱基異丁基酮（MIBK 098142422 )，乙酸異丁酯，2-硝基丙烷，乙酸正丁酯，丙二醇曱 表單編號A0101 第4頁/共14頁 0982072826-0 201119754 Ο 醚，甲基異戊基酮（ΜΙ ΑΚ)，乙酸曱基戊酯，丙酸正丁 酯，丙二醇甲醚乙酸酯，乙酸戊酯，甲基正戊基曱酮， 異丁酸異丁酯，羥乙基乙醚，環已酮，丙二醇單丁基醚 ，丙二醇單丙基醚，乙二醇乙醚乙酸酯，二異丁基甲酮 (DIBK)，乙二醇丙醚，二丙酮醇，乙二醇丁醚，丙二 醇丁醚，甲酸-2-乙基已酯，乙二醇丁醚乙酸酯，二丙二 醇曱醚，二醇二乙酸酯，二乙二醇甲醚，二乙二醇乙醚 ，二乙二醇丙醚，乙二醇己醚，二乙二醇乙醚乙酸酯， 二乙二醇丁醚，乙二醇-2-乙基己醚塗，二乙二醇丁醚乙 酸酯，丙二單苯基醚，甲醇，乙醇，異丙醇，正丙醇， 2-丁醇，異丁醇，正丁醇，曱基異丁基曱醇，戊醇，環 己醇，二氣甲烷，全氣乙烯，甲苯，石腦油，二曱苯中 之一種或幾種之混合物。該液態塗料中固體質量佔塗料 總質量之百分比為10 %。 [0015] 步驟三，高溫預烘烤，將工件放置於溫度為50°C之烘箱 内烘烤90秒，烘烤過程中使工件之喷塗面於垂直於重力 ❹ 作用方向之平面上之投影面積達到最大。高溫預烘烤可 快速除去液態塗料中之部分溶劑，降低塗膜流動性。 [0016] 步驟四，低溫預烘烤，將工件自溫度為50°C之烘箱取出 後放置於溫度為30°C之烘箱内烘烤4分鐘，烘烤過程中工 件喷塗面之傾斜度在20度以内。低溫預烘烤可緩慢除去 喷塗液態塗料中部分溶劑。低溫預烘烤時塗膜具有一定 流動性，同時溶劑揮發速率較小，使得當溶劑揮發後， 塗膜可流動至溶劑揮發所形成之空穴中，從而避免烘烤 時塗膜形成針孔等缺陷。 098142422 表單編號A0101 第5頁/共14頁 0982072826-0 201119754 [0017] 步驟五，高溫烘乾，將工件自溫度為30°C之烘箱取出後 放置於溫度為50 °C之烘箱内烘烤1 5分鐘。經過步驟四處 理之工件表面之塗膜已經固化，但是塗膜中還有含有少 量溶劑.，此時塗膜較軟，性能較差且不方便存放，高溫 烘乾可徹底除去塗膜中溶劑使工件表面之塗膜完全幹透 〇 [0018] 塗膜經過高溫預烘烤、低溫預烘烤以及高溫烘乾，能去 除塗膜中之溶劑。高溫預烘烤可快速除去液態塗料中之 部分溶劑，降低塗膜流動性。同時，高溫預烘烤之時間 較短，能避免高溫時塗膜中溶劑與工件之表面發生反應 而腐蝕工件；低溫預烘烤在塗膜具有一定流動性時緩慢 之除去溶劑，能防止溶劑揮發過快形成針孔等缺陷；高 溫烘乾徹底除去塗膜中之溶劑使工件表面之塗膜完全幹 透。高溫預烘烤後降低了塗膜之流動性，此時，工件傾 斜放置時，上方之塗膜不易受到重力之影響向下流動， 使得低溫預烘烤時工件傾斜度小於二十度之範圍内即可 進行，高溫烘乾時工件可以更大之傾斜角度擺放，從而 提高了烘烤設備之利用率，降低烘烤之成本。 [0019] 進一步，在步驟二之後還可將工件於25°C之溫度條件下 放置30秒，使工件表面之液態塗料流平，此時工件之喷 塗面應大體水準。當液態塗料為紫外光固化塗料時，在 步驟五之後還可對工件進行紫外光固化以使液態塗料中 之固體發生化學反應而固化。 [0020] 實施例二：一種喷塗方法，包括以下步驟： 098142422 表單編號A0101 第6頁/共14頁 0982072826-0 201119754 [0021]步驟一，提供一工件，該工件具有待喷塗面。 [〇〇22]步驟二，噴塗，將黏度為8cP之液態塗料噴塗至工件之待 噴塗面以形成厚度為塗膜。本實施例中，液 態塗料為丙烯酸塗料，液態塗料之溶劑為四氫呋喃，丙 酮，乙酸甲酯，純乙酸甲酯，乙酸乙酯，丁鲷，乙酸異 丙酯，甲基正丙酮，正乙酸丙酯，甲基異丁基_ (ΜΙβκ )，乙酸異丁酯，2_硝基丙烷，乙酸正丁酯，丙二醇甲 醚，曱基異戊基酮（ΜΙΑΚ)，乙酸曱基戊酯，丙酸正丁 〇 酯，丙二醇甲醚乙酸酯，乙酸戊酯，甲基正戊基甲酮， 異丁酸異丁酯，羥乙基乙醚，環已酮，丙二醇單丁基醚 ，丙二醇單丙基醚，乙二醇乙醚乙酸酯，二異丁基甲酮 (DIBK)，乙—醇丙喊，二丙_醇，乙二醇丁喊，丙二 醇丁喊，甲酸-2-乙基已醋，乙二醇丁醚乙酸醋，二丙二 醇甲趟，二醇二乙酸醋，二乙二醇甲醚，二乙二醇乙醚 ，二乙二醇丙醚，乙二醇&醚，二乙二醇乙醚乙酸酯， 二乙二醇丁醚，乙二醇_2_乙基己醚塗，二乙二醇丁醚乙 〇 酸醋’丙二單苯基醚，甲降，令醇，異丙醇，正丙醇， 2-丁醇，異丁醇，正丁醇，甲基異丁基甲醇，戊醇，環 己醇，二氣甲&，全氣乙稀，甲苯，石腦油二甲苯中 之一種或幾種之混合物。該液態塗料中固體質量佔塗料 總質量之百分比為5〇%。 闺步驟三，高溫預烘烤，將卫件放置於溫度為帆之供箱 内供烤1G秒’烘烤過程中使卫件之噴塗面於垂直於重力 仙方向之平面上之投影面積達到最大投影面積之〇. 966 倍。 098142422 表單編號A0101 第7頁/共14頁 0982072826-0 201119754 [0024] ’: 低恤預烘烤，將工件自溫度為8(TC之烘箱取出 置於度為5Gc之烘箱内*共烤1分鐘，烘烤過程中工 件噴塗面之傾斜度在15度以内。 [0025] 步驟五 向烘乾，將工件自溫度為& 〇它之烘箱取出後 放置於/m度為8 〇 之烘箱内烘烤5分鐘。 [0026]進—步，在步驟- ^驟—之後還可將工件於如艺之溫度條件下 心使工件表面之液態塗料流平，此時工件之喷 塗面應大體水準。當液態塗料為紫外光固化塗料時，在 步驟五之後還可對卫件進行紫外光固化以使液態塗料中 之固體發生化學反應而固化。 剛f施例三：—種噴塗方法，包括以下步驟： 0)028] #驟-’提供一工件，該工件具有待喷塗面。 _]㈣二’噴塗，將黏度為4eP之液態塗料喷塗至工件之待 Μ塗面以形成厚度為5 β m_6〇 ei塗膜。本實施例中，液 悲塗料為丙烯酸塗料，液態塗料之溶劑為四氫呋喃丙 晒’乙酸甲醋’純乙酸甲酯，乙酸乙酯，丁酮，乙酸異 丙酯，甲基正丙酮，正乙酸丙酯，甲基異丁基酮（MIBK )，乙酸異丁酯，2-硝基丙烷，乙酸正丁酯，丙二醇甲 謎’甲基異戊基(MIAK)，乙酸甲基戊醋，丙酸正丁 酯，丙二醇甲醚乙酸酯，乙酸戊酯，甲基正戊基甲酮， 異丁酸異丁酯，羥乙基乙醚，環已酮，丙二醇單丁基醚 丙—醇單丙基鍵，乙二醇乙驗乙酸S旨，二異丁基甲嗣 (DIBK)，乙一醇丙趟，二丙網醇，乙二醇丁謎，丙二 醇丁醚，甲酸-2-乙基已酯，乙二醇丁醚乙酸酯，二丙二 098142422 表單編號A0101 第8頁/共14頁 0982072826-0 201119754 醇甲醚，二醇二乙酸酯，二乙二醇曱醚，二乙二醇乙醚 ，二乙二醇丙醚，乙二醇己醚，二乙二醇乙醚乙酸酯， 二乙二醇丁醚，乙二醇-2-乙基己醚塗，二乙二醇丁醚乙 酸酯，丙二單笨基醚，曱醇，乙醇，異丙醇，正丙醇， 2-丁醇，異丁醇，正丁醇，甲基異丁基甲醇，戊醇，環 己醇，二氣甲烷，全氣乙烯，曱苯，石腦油，二甲苯中 之一種或幾種之混合物。該液態塗料中固體質量佔塗料 總質量之百分比為3 0 %。 [0030] 步驟三，高溫預烘烤，將工件放置於溫度為70°C之烘箱 内烘烤3 0秒，烘烤過程中使工件之喷塗面於垂直於重力 作用方向之平面上之投影面積達到最大。 [0031] 步驟四，低溫預烘烤，將工件自溫度為70°C之烘箱取出 後放置於溫度為45°C之烘箱内烘烤3分鐘，烘烤過程中工 件喷塗面之傾斜度在2 0度以内。 [0032] 步驟五，高溫烘乾，將工件自溫度為45°C之烘箱取出後 放置於溫度為70°C之烘箱内烘烤8分鐘。 [0033] 進一步，在步驟二之後還可將工件於25°C之溫度條件下 放置30秒，使工件表面之液態塗料流平，此時工件之喷 塗面應大體水平。當液態塗料為紫外光固化塗料時，在 步驟五之後還可對工件進行紫外光固化以使液態塗料中 之固體發生化學反應而固化。 [0034] 實施例四：一種喷塗方法，包括以下步驟： [0035] 步驟一，提供一工件，該工件具有待喷塗面。 098142422 表單編號A0101 第9頁/共14頁 0982072826-0 201119754 剛#驟二，噴塗，將黏度為6cP之液態塗料喷塗至工件之待 喷塗面以形成厚度為5 wm-60ym塗膜。本實施例中，液 態塗料為丙烯酸塗料，液態塗料之溶劑為四氫呋喃，丙 酮，乙酸甲酯’純乙酸甲酯，乙酸乙酯，丁酮，乙酸異 丙酯，甲基正丙酮，正乙酸丙酯，甲基異丁基_ (ΜΙΒκ )，乙酸異丁酯，2_硝基丙烷，乙酸正丁酯，丙二醇甲 謎’甲基異戊基酮（ΜΙΑΚ)，乙酸甲基戊酯，两酸正丁 酯’丙二醇甲醚乙酸酯，乙酸戊酯，甲基正戊基〒酮， 異丁酸異丁酯，羥乙基乙醚，環已嗣，丙二醇單丁基醚 ，丙二醇單丙基醚，乙二醇乙醚乙酸酯，二異丁基甲嗣 (DIBK)，乙—醇丙醚，二丙网醇，乙二醇丁醚，丙二 醇丁醚，甲酸-2—乙基已醋，乙二醇丁醚乙雖醋，二丙二 醇甲峻，二醇二乙酸醋，二乙二醇甲謎，二乙二醇乙醚 ，二乙二醇丙醚，乙二醇己醚，二乙二醇乙醚乙酸酯， 二乙二醇丁醚，乙二醇-2—乙基己醚塗，二乙二醇丁醚乙 酸酯，丙二單笨基醚，甲醇，乙醇，異丙醇，正丙醇， 2-丁醇，異丁醇，正丁醇，甲基異丁基甲醇戊醇環 己醇’ 一氣甲燒’全氣乙烯，申苯，石腦油，二甲苯中 之-種或幾種之混合物。該液態塗料中固體質量佔塗料 總質量之百分比為4〇%。 [0037] 步驟一，同/JBL預烘烤，將工件放置於溫度為了〇。〇之烘箱 内供烤3G秒’艇烤過程中使I件之喷塗面於垂直於重力 作用方向之平面上之投影面積達到最大。 [0038] 步驟四，低溫預烘烤，將工件自溫度為之供箱取出 後放置於溫度為45。(：之供箱内供烤3分鐘，烘烤過程中工 098142422 表單編號麵1 第H)㈣14胃 201119754 [0039] [0040]Propyl ester, decyl-n-acetone, propyl-n-propyl acetate, decyl isobutyl ketone (MIBK 098142422), isobutyl acetate, 2-nitropropane, n-butyl acetate, propylene glycol hydrazine Form No. A0101 Page 4 / Total 14 pages 0982072826-0 201119754 Ο Ether, methyl isoamyl ketone (ΜΙ ΑΚ), decyl amyl acetate, n-butyl propionate, propylene glycol methyl ether acetate, amyl acetate, methyl n-pentyl fluorenone , isobutyl isobutyrate, hydroxyethyl ether, cyclohexanone, propylene glycol monobutyl ether, propylene glycol monopropyl ether, ethylene glycol ethyl ether acetate, diisobutyl ketone (DIBK), ethylene glycol propyl ether , diacetone alcohol, ethylene glycol butyl ether, propylene glycol butyl ether, 2-ethylhexyl formate, ethylene glycol butyl ether acetate, dipropylene glycol oxime ether, glycol diacetate, diethylene glycol Ether, diethylene glycol diethyl ether, diethylene glycol propyl ether, ethylene glycol hexyl ether, diethylene glycol diethyl ether acetate, diethylene glycol butyl ether, ethylene glycol-2-ethylhexyl ether coating, two Ethylene glycol butyl ether acetate, propylene diphenyl ether, methanol, ethanol, isopropanol, n-propanol, 2-butanol, isobutanol, n-butanol, mercaptoisobutyl sterol, pentane , Cyclohexanol, diethylene methane gas, ethylene gas whole, toluene, naphtha, a mixture of two or more of Yue of benzene. The solids mass of the liquid coating is 10% of the total mass of the coating. [0015] Step 3, pre-baking at a high temperature, the workpiece is placed in an oven at a temperature of 50 ° C for 90 seconds, and the projection surface of the workpiece is projected on a plane perpendicular to the direction of gravity 烘烤 during the baking process. The area is the largest. High-temperature pre-baking can quickly remove some of the solvent in the liquid coating and reduce the fluidity of the coating. [0016] Step 4, low temperature prebaking, the workpiece is taken out from the oven at a temperature of 50 ° C and placed in an oven at a temperature of 30 ° C for 4 minutes. The inclination of the sprayed surface of the workpiece during the baking process is Within 20 degrees. Low temperature prebaking can slowly remove some of the solvent from the sprayed liquid coating. When the film is pre-baked at a low temperature, the coating film has a certain fluidity, and the solvent volatilization rate is small, so that when the solvent is volatilized, the coating film can flow to the cavity formed by the solvent volatilization, thereby avoiding pinhole formation of the coating film during baking. defect. 098142422 Form No. A0101 Page 5 of 14 0982072826-0 201119754 [0017] Step 5, high temperature drying, the workpiece is taken out from the oven at 30 ° C and placed in an oven at a temperature of 50 ° C. 5 minutes. The coating film on the surface of the workpiece treated in the fourth step has been cured, but the coating film also contains a small amount of solvent. At this time, the coating film is soft, the performance is poor and inconvenient to store, and the high temperature drying can completely remove the solvent in the coating film to make the workpiece. The coating film on the surface is completely dry. [0018] The coating film is subjected to high temperature prebaking, low temperature prebaking, and high temperature drying to remove the solvent in the coating film. High-temperature pre-baking can quickly remove some of the solvent in the liquid coating and reduce the fluidity of the coating. At the same time, the high temperature prebaking time is short, which can avoid the reaction of the solvent in the coating film with the surface of the workpiece at high temperature to corrode the workpiece; the low temperature prebaking slowly removes the solvent when the coating film has a certain fluidity, and can prevent the solvent from evaporating. Defects such as pinholes are formed too quickly; the solvent in the coating film is completely removed by high-temperature drying to completely dry the coating film on the surface of the workpiece. The high temperature pre-baking reduces the fluidity of the coating film. At this time, when the workpiece is placed obliquely, the upper coating film is not easily affected by the gravity, so that the workpiece inclination is less than 20 degrees during the low temperature prebaking. It can be carried out, and the workpiece can be placed at a larger inclination angle during high-temperature drying, thereby improving the utilization rate of the baking equipment and reducing the cost of baking. [0019] Further, after the second step, the workpiece can be placed at a temperature of 25 ° C for 30 seconds to level the liquid paint on the surface of the workpiece, and the sprayed surface of the workpiece should be at a normal level. When the liquid coating is an ultraviolet curable coating, the workpiece may be UV cured after step 5 to chemically react and solidify the solid in the liquid coating. [0020] Embodiment 2: A spraying method comprising the following steps: 098142422 Form No. A0101 Page 6 of 14 0982072826-0 201119754 [0021] Step one, providing a workpiece having a surface to be sprayed. [〇〇22] Step 2, spraying, spraying a liquid paint having a viscosity of 8 cP onto the surface to be sprayed of the workpiece to form a coating film. In this embodiment, the liquid paint is an acrylic paint, and the solvent of the liquid paint is tetrahydrofuran, acetone, methyl acetate, pure methyl acetate, ethyl acetate, butyl hydrazine, isopropyl acetate, methyl n-acetone, propyl orthoacetate. , methyl isobutyl _ (ΜΙβκ ), isobutyl acetate, 2-nitropropane, n-butyl acetate, propylene glycol methyl ether, decyl isoamyl ketone (oxime), decyl amyl acetate, propionic acid Butanyl ester, propylene glycol methyl ether acetate, amyl acetate, methyl n-pentyl ketone, isobutyl isobutyrate, hydroxyethyl ether, cyclohexanone, propylene glycol monobutyl ether, propylene glycol monopropyl ether , ethylene glycol ethyl ether acetate, diisobutyl ketone (DIBK), ethyl alcohol, propylene, dipropanol, ethylene glycol, propylene glycol, propylene glycol, formic acid, 2-ethyl vinegar, ethylene glycol Butyl ether acetate vinegar, dipropylene glycol formazan, diol diacetate vinegar, diethylene glycol methyl ether, diethylene glycol diethyl ether, diethylene glycol propyl ether, ethylene glycol & ether, diethylene glycol diethyl ether acetate Ester, diethylene glycol butyl ether, ethylene glycol 2_ethylhexyl ether coating, diethylene glycol butyl ether acetate vinegar 'propane diphenyl ether, Descending, alcohol, isopropanol, n-propanol, 2-butanol, isobutanol, n-butanol, methyl isobutyl carbitol, pentanol, cyclohexanol, two gas & a mixture of one or more of toluene, naphtha xylene. The solid mass in the liquid coating is 5 % by weight of the total mass of the coating.闺Step 3, pre-bake at high temperature, place the guard in the temperature for the sail for 1G seconds. During the baking process, the projected area of the sprayed surface of the guard on the plane perpendicular to the gravity direction is maximized. The projected area is 966 966 times. 098142422 Form No. A0101 Page 7 of 14 0982072826-0 201119754 [0024] ': Low-tie pre-baking, the workpiece is taken from the oven at a temperature of 8 (TC oven is placed in an oven of 5Gc* for 1 minute) The inclination of the sprayed surface of the workpiece during the baking process is within 15 degrees. [0025] Step five-direction drying, the workpiece is taken out from the oven of temperature & 〇, and placed in an oven of /m degree 8 〇 Bake for 5 minutes. [0026] Step-by-step, after the step----the workpiece can be leveled under the temperature conditions of the art to level the liquid coating on the surface of the workpiece, at which time the sprayed surface of the workpiece should be of a normal level. When the liquid coating is an ultraviolet curing coating, after the step 5, the curing member may be UV-cured to chemically react and solidify the solid in the liquid coating. Just f. Example 3: The spraying method includes the following steps: 0) 028] #骤-' Provide a workpiece with the surface to be painted. _] (4) Two spraying, spraying a liquid coating having a viscosity of 4 eP onto the surface to be coated of the workpiece to form a coating film having a thickness of 5 β m_6 〇 ei. In this embodiment, the liquid sorrow coating is an acrylic paint, and the solvent of the liquid paint is tetrahydrofuran propyl 'acetate methyl vinegar' pure methyl acetate, ethyl acetate, methyl ethyl ketone, isopropyl acetate, methyl n-acetone, positive acetic acid Ester, methyl isobutyl ketone (MIBK), isobutyl acetate, 2-nitropropane, n-butyl acetate, propylene glycol mystery 'methyl isopentyl (MIAK), methyl acetate vinegar, propionic acid Butyl ester, propylene glycol methyl ether acetate, amyl acetate, methyl n-pentyl ketone, isobutyl isobutyrate, hydroxyethyl ether, cyclohexanone, propylene glycol monobutyl ether propyl-alcohol monopropyl bond , ethylene glycol, acetic acid, S, diisobutylformamidine (DIBK), ethyl propylene glycol, dipropanol, ethylene glycol butyl, propylene glycol butyl ether, 2-ethyl hexyl formate, ethylene glycol Butyl Ether Acetate, Dipropylene II 098142422 Form No. A0101 Page 8 of 14 0982072826-0 201119754 Alcohol Methyl Ether, Diol Diacetate, Diethylene Glycol Ether, Diethylene Glycol Ether, Diethyl Glycol propyl ether, ethylene glycol hexyl ether, diethylene glycol diethyl ether acetate, diethylene glycol butyl ether, ethylene glycol-2-ethylhexyl ether coating, two Alcohol butyl ether acetate, propylene diphenyl ether, decyl alcohol, ethanol, isopropanol, n-propanol, 2-butanol, isobutanol, n-butanol, methyl isobutyl methoxide, pentanol, A mixture of one or more of cyclohexanol, di-methane, total ethylene, terpene, naphtha, and xylene. The solids mass of the liquid coating is 30% of the total mass of the coating. [0030] Step 3, pre-baking at a high temperature, the workpiece is placed in an oven at a temperature of 70 ° C for 30 seconds, and the projection surface of the workpiece is projected on a plane perpendicular to the direction of gravity. The area is the largest. [0031] Step 4, low temperature prebaking, the workpiece is taken out from the oven at a temperature of 70 ° C and placed in an oven at a temperature of 45 ° C for 3 minutes. The inclination of the sprayed surface of the workpiece during the baking process is Within 2 0 degrees. [0032] Step 5, drying at a high temperature, the workpiece was taken out from the oven at a temperature of 45 ° C, and then placed in an oven at a temperature of 70 ° C for 8 minutes. [0033] Further, after the second step, the workpiece can be placed at a temperature of 25 ° C for 30 seconds to level the liquid paint on the surface of the workpiece, and the sprayed surface of the workpiece should be substantially horizontal. When the liquid coating is an ultraviolet curable coating, the workpiece may be UV cured after step 5 to chemically react and solidify the solid in the liquid coating. [0034] Embodiment 4: A spraying method comprising the following steps: [0035] Step one, providing a workpiece having a surface to be sprayed. 098142422 Form No. A0101 Page 9 of 14 0982072826-0 201119754 Just #二二, spraying, spray a liquid paint with a viscosity of 6cP to the surface to be sprayed to form a coating film with a thickness of 5 wm-60ym. In this embodiment, the liquid paint is an acrylic paint, and the solvent of the liquid paint is tetrahydrofuran, acetone, methyl acetate 'pure methyl acetate, ethyl acetate, methyl ethyl ketone, isopropyl acetate, methyl n-acetone, propyl orthoacetate. , methyl isobutyl _ (ΜΙΒκ), isobutyl acetate, 2-nitropropane, n-butyl acetate, propylene glycol, 'mymethyl isoamyl ketone (oxime), methyl amyl acetate, two acids Butyl ester 'propylene glycol methyl ether acetate, amyl acetate, methyl n-amyl fluorenone, isobutyl isobutyrate, hydroxyethyl ether, cycloheximide, propylene glycol monobutyl ether, propylene glycol monopropyl ether, Ethylene glycol ethyl ether acetate, diisobutyl formamidine (DIBK), ethyl alcohol propyl ether, dipropanol, ethylene glycol butyl ether, propylene glycol butyl ether, formic acid 2-ethyl vinegar, ethylene glycol butyl Ethyl ether, vinegar, dipropylene glycol, diol diacetate, diethylene glycol, diethylene glycol ether, diethylene glycol propyl ether, ethylene glycol hexyl ether, diethylene glycol diethyl ether acetate , diethylene glycol butyl ether, ethylene glycol 2-ethylhexyl ether coating, diethylene glycol butyl ether acetate, propylene diphenyl ether, A ,ethanol, isopropanol, n-propanol, 2-butanol, isobutanol, n-butanol, methyl isobutylmethanol, pentanol, cyclohexanol, 'one gas, calcined', all-gas ethylene, benzene, naphtha , a mixture of the species or a mixture of several of the xylenes. The solid mass in the liquid coating is 4% by weight of the total mass of the coating. [0037] Step one, pre-baking with /JBL, placing the workpiece at temperature for enthalpy. The oven for bake is 3G seconds. During the roasting process, the projected area of the sprayed surface of the I piece on the plane perpendicular to the direction of gravity is maximized. [0038] Step 4, pre-baking at a low temperature, and taking the workpiece out of the temperature for the box and placing it at a temperature of 45. (: The inside of the box is for baking for 3 minutes, during the baking process 098142422 Form number face 1 H) (4) 14 stomach 201119754 [0039] [0040]
[0041] ❹ 件喷塗面之傾斜度在2 0度以内。 步驟五，高溫烘乾，將工件自溫度為45°C之烘箱取出後 放置於溫度為70°C之烘箱内烘烤12分鐘。 進一步之，在步驟二之後還可將工件於25°C之溫度條件 下放置30秒，使工件表面之液態塗料流平，此時工件之 喷塗面應大體水準。當使用之液態塗料為紫外光固化塗 料時，在步驟五之後還可對工件進行紫外光固化以使液 態塗料中之固體發生化學反應而固化。 綜上所述，本發明確已符合發明專利之要件，爰依法提 出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，本發明之範圍並不以上述實施方式為限，舉凡熟悉 本案技藝之人士援依本發明之精神所作之等效修飾或變 化，皆應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 【主要元件符號說明】 098142422 表單編號A0101 第11頁/共14頁 0982072826-0[0041] The inclination of the sprayed surface of the workpiece is within 20 degrees. In step 5, the substrate was dried at a high temperature, and the workpiece was taken out from the oven at a temperature of 45 ° C and then placed in an oven at a temperature of 70 ° C for 12 minutes. Further, after the second step, the workpiece can be placed at a temperature of 25 ° C for 30 seconds to level the liquid paint on the surface of the workpiece, and the sprayed surface of the workpiece should be at a normal level. When the liquid coating used is a UV curable coating, the workpiece may be UV cured after step 5 to chemically react the solid in the liquid coating to solidify. In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application. [Simple diagram description] [Main component symbol description] 098142422 Form number A0101 Page 11 of 14 0982072826-0