Problems and solutions in the Mask Cosmetic Box gluing process

Problems and solutions in the Mask Cosmetic Box gluing process

In the process of Cosmetic Box pasting boxes, everyone encountered various problems, and at the same time, there were also a variety of solutions. The following is a detailed analysis of some problems and their causes:

1. The pasting fastness is not high, and the carton is degummed

Degumming refers to falling off due to insufficient adhesive fastness. The main reasons are summarized as follows:

①The viscosity of the adhesive is not enough or the amount of glue applied is not enough;

②The adhesive and the carton material are not suitable;

③If the sticky mouth part of the carton is covered with film, glazing and other surface treatments, it is difficult for the adhesive to penetrate into the paper through the surface layer, and such a carton is more difficult to stick firmly;

④After folding and gluing, the pressure is insufficient and the pressing time is not long enough, which is not conducive to the strong paste.

The solution for sticking is not strong:

(1) For the above-mentioned problems that the glue box is not strong due to the adhesive, the adhesive suitable for the carton material to be pasted should be selected. The selection and use of adhesives are also very particular.

First of all, in the selection of adhesives, it is also necessary to analyze the specific situation. According to the carton of different materials and conditions, the selection of adhesives can be referred to as follows:

1) For packaging Mask Cosmetic Boxes without surface treatment, use paper-to-paper adhesives when sticking the boxes;

2) The box whose surface is film-coated shall use an adhesive that bonds the film to the paper;

3) The box whose surface is oiled uses an adhesive that bonds oil and paper;

4) If the product is sent to the cold climate area, the adhesive with strong low temperature resistance should be used;

5) When the products are sent to tropical regions, high temperature resistant adhesives should be used;

6) The automatic folder gluer has high speed and short pressing time, so the adhesive with fast drying time should be used;

7) The speed of manual gluing is slow, and the adhesive with slow drying time can be used for long pressing time;

8) When pasting the linear box, the pressing and curing time can be shorter;

9) When pasting the automatic bottom box, the pressing and curing time should be correspondingly longer;

10) In summer, use adhesives with slower drying times;

11) In winter, use adhesives with faster drying time, etc.

Secondly, the adhesive force of the adhesive should be strong. Because the instantaneous pressure of the forming part is not very large, and during the high-speed operation of producing 30 to 40 cartons per minute, the pressing dwell time is not long. The adhesive with strong adhesion itself can stick the carton firmly even if it is lightly pressed.

Finally, the ambient temperature of the operating workshop will have a certain impact on the adhesive. If the temperature of the operating workshop is too low, the adhesive will solidify immediately, affecting the firmness of the bond, even if the amount of glue applied is too large. Of course, the less glue is applied, the more sensitive it is to room temperature. Therefore, in winter, the temperature of the operation workshop should be kept above 20°C as much as possible, and air conditioners can be installed if conditions permit. In the operation workshop, a large and easily visible thermometer is also installed to check and control the working environment at any time. For the pasted products, they should be dried at room temperature before leaving the factory. In winter, do not rush to deliver the products before they are dry.

(2) For the carton that has been covered and varnished, there are the following 4 methods to solve the problem of the unsteady gluing:

①When die cutting, place a needle and thread knife at the sticky mouth to puncture the surface of the sticky mouth, which is conducive to the penetration of the adhesive;

②Use the edging device attached to the automatic folder gluer to grind the surface of the sticky mouth to facilitate the penetration of the adhesive;

③Spray the hot melt adhesive to the sticky mouth, and use high temperature to melt the material on the sticky mouth surface to improve the firmness of the pasting box;

④In the pre-press box design, the glued part can be reserved in advance on the edge of the box to be coated and varnished.

(3) For the phenomenon that the folder is not strong due to insufficient pressure, you can increase the pressure of the pressing part of the folder gluer, prolong the pressing time, or replace the adhesive with strong adhesion.

2. Deformation of the Mask Cosmetic Box

There are three main reasons for the deformation of the carton:

①Some die-cutting plates are made by hand, often due to low precision, the carton is inconsistent, and the glued carton is deformed;

②The concentration of the adhesive is low and the water content is large, which causes the cardboard to absorb moisture and deform, and the carton is not flat after forming:

③The folder gluer itself is not well adjusted.

This problem can be solved as long as the quality of die-cutting is stable, the appropriate adhesive is selected, and the folder-gluer is adjusted well.

3. The sticky mouth of the Mask Cosmetic Box is skewed

There are three main reasons for the skewed sticky mouth of the carton:

①The indentation groove of the indentation steel wire is too wide and the indentation pressure is not enough, so that the indentation line is not full, and the indentation line cannot be folded accurately when folding;

②The folding transmission is improperly adjusted, and the conveying speed of the left and right sides of the box is inconsistent, causing the sticky mouth to be skewed;

③The folding rod is not installed properly.

Solution: reduce the groove width of the indentation steel wire and increase the indentation pressure; adjust the folding transmission to make the conveying speed of the left and right sides of the carton consistent, and reinstall the folding rod.

4. Inaccurate alignment of sticky mouth

Inaccurate sticky mouth alignment means that the sticky mouth is misplaced, and the misplaced carton cannot be formed well. This phenomenon is usually caused by the inaccurate adjustment of the machine. Further, it is mainly due to the insufficient understanding of the box type and the folder gluer by the operator, which affects its operation level.

Therefore, strengthening the training of operators, improving their operating skills and their understanding of complex box shapes will effectively avoid the problem of inaccurate sticky mouth alignment.

5. Sticky glue

Glue overflow refers to the excessive amount of adhesive flowing out of the sticky mouth. This phenomenon is mainly caused by the dislocation of the glue box and the excessive amount of adhesive. By grinding the sticky mouth and reducing the amount of glue, the occurrence of glue overflow can be effectively reduced.

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