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BuKe factory >> Questions >> 印刷公司壓痕線不清晰的工藝故障和處理

印刷公司壓痕線不清晰的工藝故障和處理

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2020-09-22 | 367 Views | 🔊 Click to read aloud ❚❚ ▶ | Share:
“暗線”是指不應該有的壓痕線;“爆線”是指由於模切壓痕壓力過大,超過了紙張纖維的承受極限,使紙張纖維斷裂或部分斷裂。產生這種故障的原因及解決方法如下:

印刷公司壓痕線不清晰的工藝故障和處理

“暗線”是指不應該有的壓痕線;“爆線”是指由於模切壓痕壓力過大,超過了紙張纖維的承受極限,使紙張纖維斷裂或部分斷裂。產生這種故障的原因及解決方法如下:

(1)壓痕底模和壓痕線不合適。

(2)模切機的壓力不合適。當整版壓力調整為能將印品待模切部分的70%~80%切穿時,即可進行局部墊版調節


(3)墊版紙的厚度不準確。由於紙墊得過低或過高而造成“暗線”或“爆線”,調節方法是重新墊紙。


(4)紙質太差或紙張含水量過低。紙張因含水量變化導致脆性增大、韌性降低,也會產生“爆線”,可以通過增大環境濕度來解決。


此外,在模切硬盒煙包小盒時,由於一些位置的壓痕線距離很近,如果按正常情況配置壓痕線的高度,模壓時會對紙張產生較大拉力,造成“爆線”。這時應設法將紙張受到的拉力降到最小。較好的方法是降低壓痕線的高度,降低的高度一般為01~0.2mm。通常應根據紙張厚度確定壓痕線的降低高度,定量在350g/m2以上的紙張需降低02mm,350g/m2以下的紙張以降低0mm為宣。

印刷公司壓痕線不清晰的工藝故障和處理
印刷公司壓痕線不清晰的工藝故障和處理

 

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