How to Solve Technical Problems in Embossing Process

Understanding some technical problems in embossing process is very helpful to improve production quality.

First, if the paper weight is low, the production effect will be affected when the environmental humidity changes. This is because the change of humidity is easy to deform the paper. That is, the paper flatness is reduced, which directly leads to wrinkles in the embossing process. The greater the degree of distortion of the paper under pressure, the more serious the wrinkles will be, and the higher the rate of residual production will be. Therefore, the method of reducing the pressure will be adopted to reduce the residual production, which will result in incomplete or insufficient grain formation and less obvious effect. For example, pear grain, broken skin grain, golden sand grain, etc., although they are single grain, it is difficult to distinguish the pictographic grain.

Second, the front and back Yin and Yang effect is not prominent. This situation is not only caused by insufficient manufacturing pressure, but also shows that the front and back rollers are highly worn and can not form the front and back Yin and Yang effect. The positive and negative stripes are realized by meshing and rolling of metal roller and synthetic resin roller. Synthetic resin roll is easy to wear, but for cost consideration, manufacturers often reduce wear by reducing pressure or use it beyond the limit, which will reduce the process effect. In view of such problems, responsible printing should have clear and specific technical requirements for the production effect of embossing process.

Third, according to the texture of the paper, a reasonable choice of the density of the embossing grain or the size of the pattern can well reflect the embossing effect and improve the quality of the embossing process. In the front, when the texture and density of other materials are not as good as that of coated paper, the principle should be that the grain selected when the material texture is loose should be extensive. Fine lines or single side lines are pressed, and the processing effect on offset paper and other materials is not obvious.

The above contents are some noticeable problems in book cover embossing process. In the actual operation process, we are mostly in a passive position to accept the bad production effect, which is due to our lack of understanding of the production characteristics and technical requirements of embossing process. In order to better reflect the effect of embossing process, enhance the aesthetic feeling and sense of thickness of the cover, and improve the artistic taste of book binding, we should start from the design, material use and production and other aspects. The technical requirements of embossing process should deal with details, and pursue high-quality production effects. Let's see the effect of Wenzhou Feihua automatic embossing laminating machine.