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印刷公司模切時起毛、起塵的工藝故障和處理

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2020-09-22 | 394 Views | 🔊 Click to read aloud ❚❚ | Share:
通常高質量的原生紙纖維較長,一般不容易起毛、起塵。然而,現階段大多數廠家需要降低包裝成本,加之大力推行紙品循環再生的環保意識,導致再生紙的用量漸增。因此,在盡量選用好的印刷紙張的前提下,應該從模切工藝方面解決起毛、起塵問題

印刷公司模切時起毛、起塵的工藝故障和處理


通常高質量的原生紙纖維較長,一般不容易起毛、起塵。然而,現階段大多數廠家需要降低包裝成本,之大力推行紙品循環再生的環保意識,導致再生紙的用量漸增。因此,在盡量選用好的印刷紙張的前提下,該從模切工藝方面解決起毛、起塵問題


在選配安裝模切刀、壓痕線和模切膠條時,要盡可能地避免起塵、起毛問題。在避免紙毛方面,直紋刀要比橫紋刀好。對模切刀的刀鋒也需要特別關註,若刀鋒處理不當(如錶面有很多氣孔和瑕疵),則容易造成起毛、起塵問題。此外,模切刀與模切膠條的配套和安裝要規範,否則也會造成模切起毛問題。模切膠條必須有足夠的硬度才可以壓緊紙張,讓模切刀順利地將紙張切開,不至於產生過多的紙毛。

模切膠條的選擇原則是
當模切刀之間的距離小於8mm,應選擇硬度為HS60(固體型)的模切膠條,而大於8mm,則應選擇硬度為HS25或HS35的模切膠條;當模切刀與壓痕線之間的距離小於10mm時,應選擇硬度為HS70的拱型模切膠條,大於10mm,則應選擇硬度為HS35的拱型模切膠條。模切膠條應安裝在距離模切刀最少lmm的位置,否則,模切膠條在受壓後只能向刀身的反方向膨脹,向兩邊拉紙,在模切刀還未來得及切斷紙張時,張已被模切膠條拉斷,產生起毛、紙塵。

另外
,模切膠條應高出刀鋒1.2mm左右,並視不同的硬度作適當調節。若模切膠條硬度大於HS35,則應高出刀鋒不足12mm,反之則應高出刀鋒1.2mm以上。

印刷公司模切時起毛、起塵的工藝故障和處理
印刷公司模切時起毛、起塵的工藝故障和處理

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