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精裝書印刷工藝二:刷膠

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2021-02-03 | 1039 Views | Share:
精裝書印刷工藝二:刷膠

精裝書印刷工藝二:刷膠

壓平後的書芯要進行刷膠,有先刷膠後裁切的,有先裁切後刷膠的。這兩種方法各有特點,均可採用先刷膠可使書芯中的各帖不易移動,後刷膠有利於扒圓定型壓平後的書芯後背刷膠,是書芯加工的第一次刷膠,其作用是使書芯初步定型,為下道工序扒圓、起脊造型加工作準備。

第一次刷膠操作時要求:所用膠水要稀薄,過稠的膠水黏性強影響扒圓弧度的準確性,不易造型;刷膠時要薄而均勻,特別是書芯的兩端必須刷勻,不得有漏刷的書帖刷的書帖扒圓起脊後就會散開,書背也會就裂,影響書籍外觀質量第一次刷膠操作有手工刷膠和機器刷膠兩種方法


1.
手工刷膠

手工刷第一次膠時,有先刷膠和後刷膠之分。先刷膠時,將壓好的書芯數本撞齊扎捆後,用刷子蘸膠水在書背的錶面,輕輕地(或間隔地)刷上一層薄薄的稀膠水。當書背膠水乾燥到七八成時(以不粘書頁和手為適),分本進行裁切。後刷膠時將壓平的書芯撞齊後先裁切,然後碼放整齊。書背朝一方向,手按住上面書冊錶面,另一手用毛刷在書背上刷抹一層黏合劑,刷完黏合劑後立即將本分開並錯口將書背露在外面,自然乾燥到以不粘手(即七八成千),即可進行變形加工。


2.機器刷膠烘乾

機器刷膠烘乾,輸送裝置把完成鎖線的書芯,書背朝下送至進本機構,被夾板夾持進入刷膠機構,上膠輥和毛刷輥沿書背刷膠,書芯間歇前進,書背下的烘乾槽向書背吹送熱,使書背烘至八成乾為止,完成刷膠烘乾工序,經出書傳送裝置出書為了在刷膠後使書背定住,又能在扒圓時書背隨著變形,書背膠不能烘的太乾,但也不能乾不透,以免起脊時膠層被搓破

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精裝書印刷工藝二:刷膠
精裝書印刷工藝二:刷膠

 

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