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數(shù)字噴墨印刷,速度越快越好嗎?
編輯:冰點 [ 2021-5-13 16:07:02 ] 文章來源:廣告設(shè)備在線
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數(shù)字印刷一般針對短版作業(yè),這或許是常識,但也有例外,例如,在票據(jù)和直郵印刷中涉及大量可變數(shù)據(jù)作業(yè)時。同樣,對于靜態(tài)作業(yè),數(shù)字印刷,尤其是噴墨印刷,正在將界限推向更長版的作業(yè)。

如今,市場上有許多超大產(chǎn)能的噴墨解決方案。在單張紙方面,瀾達的S10納米數(shù)字印刷機提供了當前最高的輸出量,每小時可印刷6500 B1單面紙,即每分鐘約870張A4圖像。瀾達計劃將速度提高一倍,達到每小時13000張,但目前尚未實現(xiàn)。相較而言,其他單張紙噴墨解決方案的速度要慢得多,最高可超過300張A4圖像/分鐘。與連續(xù)噴墨相比,甚至S10的速度也相形見絀。

卷筒紙進料的噴墨印刷機產(chǎn)能遠超單張紙進料印刷機。大部分機型的速度可達200米/分鐘,如柯達的Prosper 6000,惠普的T490/Bluecrest IntelliJet 42HD,以及高寶的RotaJet甚至達到約300米/分鐘。在頁面輸出方面的主要區(qū)別是卷筒紙寬度。在相同速度下,一臺四塔卷筒紙印刷機可印刷的頁數(shù)是雙塔印刷機的兩倍。

在不同速度等級的雙塔卷筒紙噴墨印刷機中,用戶可以有很多選擇。在最快的彩色雙塔噴墨印刷機中,柯達Prosper 6000的印刷速度每分鐘接近5000張A4,其次是富士施樂的的FX2800,網(wǎng)屏的TruePress 520ZZ ,以及施樂的Trivor 2400。Prosper 6000的幅面稍寬,并以橫向模式印刷,從而提高了吞吐量。

與三塔印刷機相類似的卷筒紙印刷速度,與采用佳能JetStream 4300和惠普T390作為最高速度型號的標準雙塔印刷機相比,可提供約50%的吞吐率,最高可達到每分鐘4000張A4圖像。一些四塔印刷機可達到最高的卷筒紙印刷速度,而額外的寬度使它們成為生產(chǎn)力最高的噴墨印刷機。如HP T490HD/Bluecrest IntelliJet 42HD在性能模式下每分鐘可處理約8000張圖像。

印刷速度能加快嗎?

噴墨印刷機通常設(shè)計為達到并保持其額定速度。但是,以最高分辨率印刷時,它們可能需要運行得較慢。某些印刷機以較低的分辨率全速在卷筒紙方向(或兩個方向)上印刷。在這種情況下,應(yīng)針對每種應(yīng)用檢查多少細節(jié)和密度損失(取決于紙張和圖像)。差異可能很小,但需要對照所需的輸出質(zhì)量進行檢查。

同樣,高油墨覆蓋率和某些承印物可能需要使印刷機減速,以避免在印刷機中積聚濕氣。解決方法是,某些印刷機可以選擇提供額外的干燥能力,或者選擇其他干燥配置,以保持印刷速度。

需要高速印刷嗎?

如前所述,在長版作業(yè)中,很多生產(chǎn)力都派上用場。截止日期也可能很緊,這需要在短時間內(nèi)獲得最高的生產(chǎn)率。

速度還有更多考慮因素。通常,以較高的速度和較大的幅面,每頁的成本會下降。較快的設(shè)備的成本、占地面積、開銷等往往比生產(chǎn)率的增長慢。換句話說,速度加倍少于成本加倍。另一個非常重要的變量是人員配備。一臺更快的印刷機通常比兩臺印刷機所需的人員更少,而總速度只有一半。這是在傳統(tǒng)印刷領(lǐng)域,越來越多印刷商轉(zhuǎn)向大幅面膠印機的主要原因。在噴墨技術(shù)中,這一點不太明顯,因為更多的是自動化的(尤其是加工),并且通常需要更少的人員。

也有一些反對采用頂級生產(chǎn)力的印刷機的爭論,因為保持非常繁忙的工作壓力很大。對某些公司來說,從小處著手,并逐步增加噴墨量在經(jīng)濟上是有意義的。對于較寬的卷筒紙和較大紙張,后加工限制也很重要。與單臺高速設(shè)備相比,某些公司更喜歡兩臺慢速印刷機的冗余性和靈活性。

市場怎么看?

市場上有購買寬幅印刷機的買家,但與雙塔印刷機相比,安裝比例較低,這些印刷機的有限選擇也無濟于事。許多用戶不需要,并且在經(jīng)濟上也不可行。而且,使用雙塔卷筒紙進料的碳粉印刷機的印刷商通常不希望更改其后道整理設(shè)置。

仍有越來越多的書籍和商業(yè)印刷機在噴墨方面進行投資,對更廣泛、更高生產(chǎn)率的印刷機的需求比現(xiàn)在增長的更多。看起來,大量的量產(chǎn)用戶仍然更喜歡雙塔印刷機,因為這樣可以更輕松地處理基材和后加工,并可以提供備用的印刷機。

此外,噴墨印刷機的自動化程度已經(jīng)很高,因此,與其他技術(shù)相比,如將噴墨技術(shù)相互比較,可以節(jié)省員工成本。其他應(yīng)用,例如噴墨印刷的報紙、雜志和目錄,預(yù)期僅需要少量投資或根本不需要投資,就需要更高生產(chǎn)率的寬幅的卷筒紙印刷機。我們確實希望將來會有更多的雜志和目錄噴墨印刷,但這將需要更多時間。

與膠印相比的優(yōu)勢

膠印被稱為高速復制過程。有許多不同水平的生產(chǎn)力可用。單張紙膠印的生產(chǎn)率在很大程度上取決于印刷機幅面。不同供應(yīng)商和不同機型的印刷速度都會有所不同,最高速度通常在每小時15000-18000張之間。但幅面的影響更大,從B2轉(zhuǎn)為B1幅面時,在保持相同的生產(chǎn)速度的情況下,輸出量實際上會翻倍。

實際上,并非總可以達到最大的印刷速度。紙張類型、印刷圖像等都可能會限制速度。雙面印刷也會使印刷速度減慢。同樣在準備就緒和啟動過程中,印刷機的速度通常也會提高。即使在準備作業(yè)期間不考慮停頓,印刷機無法達到全速也是很常見的。

卷筒紙膠印機的運行速度要高得多,但在過去十年來,卷筒紙印刷機銷量出現(xiàn)下滑。但是,自2000年以來售出的大多數(shù)印刷機都具有較大的幅面,且產(chǎn)量倍增。同時,在目錄、報紙、雜志和插頁中的大量產(chǎn)品應(yīng)用正縮小,從而限制了市場機會,并導致了卷筒紙膠印業(yè)務(wù)的大量整合。

下表總結(jié)了不同印刷機的速度,以進行快速比較。卷筒紙噴墨印刷機已達到或超過單張紙膠印機。

量產(chǎn)噴墨印刷機已經(jīng)在廣泛的應(yīng)用領(lǐng)域中實現(xiàn)了高水平的生產(chǎn)率。就印刷圖像而言,最高速度的卷筒紙噴墨印刷機很容易超過單張紙膠印。如果無法顯著提高噴墨印刷機的成本基礎(chǔ),那么隨著市場朝著更短版的生產(chǎn)周期發(fā)展,只有有限的需求才能走得更快。生產(chǎn)印刷中的噴墨才剛剛開始其技術(shù)生命周期,并且將在許多領(lǐng)域取得進展。

但是,對于那些需要更高生產(chǎn)率,并逐步提高成本基礎(chǔ)的人來說,我們希望看到一些更快的雙塔印刷機。單張紙噴墨的情況則不同,在單張紙噴墨中,應(yīng)該會非常歡迎速度的提升,因為并非所有產(chǎn)品都可以在卷筒紙設(shè)備上有效生產(chǎn)。考慮到噴墨技術(shù)在短版訂單上具有出色的表現(xiàn),可能永遠不需要達到全膠印速度,但采用經(jīng)濟高效的包裝實現(xiàn)更高的生產(chǎn)率,肯定會擴大應(yīng)用范圍。

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