1.輸紙臺壓紙輪的壓力不勻稱
1. The pressure of the paper pressing wheel of the paper feeding table is uneven
紙張在傳送全過程中備受軸向力的作用，導致紙張在前規定位時正中間位置鼓起，在壓印后造成皺褶。
The paper is subjected to axial force in the whole process of transmission, resulting in the bulging of the paper in the middle position when the front gauge is positioned, resulting in wrinkles after embossing.
2.壓印滾筒叼紙牙排的叼力不等
2. The gripping force of the paper gripper row of the embossing cylinder is different
假如壓印滾筒叼紙牙排兩邊的叼力不夠，則紙張的拖梢處變皺；假如一邊的叼力不夠，則相對應的拖梢邊變皺；假如正中間的叼力不夠，則紙張正中間位置變皺。
If the holding force on both sides of the paper teeth row of the embossing cylinder is not enough, the trailing tip of the paper will wrinkle; If the holding force on one side is not enough, the corresponding trailing edge will wrinkle; If the holding force in the middle is not enough, the middle position of the paper becomes wrinkled.
3.紙張交接不恰當
3. Improper paper handover
在壓印前的紙張交接全過程中，假如配合不恰當，導致叼口邊紙張長度發生變化，則拖梢位置易變皺。
In the whole process of paper handover before embossing, if it is not properly matched, resulting in the change of paper length at its mouth, the trailing tip position is easy to wrinkle.
4.牙墊高低不平
4. Uneven tooth pad
紙張被叼住時，假如牙墊不平衡，紙邊會造成波浪形，叼口位置局部變皺。
When the paper is held in its mouth, if the tooth pad is unbalanced, the paper edge will cause wave shape, and the position of its mouth will be wrinkled locally.
5.紙邊與叼牙的位置有誤
5. The position of the paper edge and its teeth is wrong
紙張定位后，假如紙張被叼牙叼住了一點，導致紙邊不平整而造成變皺狀況。

After the paper is positioned, if the paper is caught by its teeth, the edge of the paper will be uneven and wrinkled.
6.壓印滾筒表層黏附的墨跡過厚
6. The ink adhered to the surface of the embossing cylinder is too thick
壓印滾筒表層黏附的墨跡過厚使紙張壓印時不平服，也會造成局部短距離變皺變形。
The ink adhered to the surface of the embossing cylinder is too thick, which makes the paper uneven during embossing, and also causes local short-distance wrinkling and deformation.
紙張根本原因
Paper root cause
1.敲紙痕跡過深、過密
1. The paper knocking marks are too deep and dense
因為敲紙用力不恰當，使敲紙痕跡過深、過密，印刷時在敲紙的折痕處易造成皺褶。
Because the paper knocking force is inappropriate, the paper knocking trace is too deep and dense, and it is easy to cause wrinkles at the crease of the paper knocking during printing.
2.紙張絲縷方向
2. Paper strand direction
紙張進到機器設備壓印時，假如其是直絲縷，就非常容易導致絲頭變皺。
When the paper enters the machine and equipment for embossing, if it is a straight silk thread, it is very easy to cause the silk head to wrinkle.
3.紙張含水量過大
3. The water content of the paper is too large
紙張含水量過大，紙張自身纖維膨脹，在壓印全過程中，膨脹的纖維由肥大變窄，易造成叼口伸向拖梢方向的枝狀皺褶。
The water content of the paper is too large, and the fiber of the paper expands. In the whole process of embossing, the expanded fiber narrows from hypertrophy, which is easy to cause dendritic folds extending from its mouth to the trailing tip.
4.環境溫濕度的干擾
4. Interference of ambient temperature and humidity
環境溫濕度變化，導致紙張含水量不勻稱，如四周含水量大于中間，造成荷葉邊，印刷時紙張易變皺。
Changes in ambient temperature and humidity lead to uneven water content of the paper. For example, the water content around is greater than that in the middle, resulting in ruffled edges and easy wrinkling of the paper during printing.
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