Laminating machine can be divided into two categories: instant coating laminating machine and pre-coating laminating machine. It is a kind of special equipment used for paper, plate and film mounting. After being pressurized by rubber drum and heating drum, it is combined together to form a product integrating paper and plastic.

What should I do if the laminator has a problem? What are the common failures of laminating machines?

1.coated goods hair warped

The primary reasons for the formation of this problem are:

(1) the print is too thin: try to prevent the film covering of thin paper.

(2) Tension imbalance: adjust the tension of the film so that it reaches equilibrium

(3) compound pressure is too large: reduce compound pressure appropriately.

(4) The temperature is too high: decrease the composite temperature.

(5) the tension of the film is too large: the tension of the film is too large, the film will elongate and deform, and the product will recover its original state after cutting and removing the external force, causing the product to bend to the side of the film. The treatment method is: conditioning to film expansion screw screw depth, reduce braking force.

(6) Winding tension is too large: winding tension is too large, will make the film and print together, but the amount of deformation is not the same. When the external force is withdrawn, the product will bend to one side of the paper, especially the thin paper. The treatment is to reduce the friction of the winding power wheel.

(7) environmental humidity: moisture content of high coated goods full of dry, paper will be dehumidified deformation, resulting in products to the side of the paper bending. The treatment method is to control the humidity of the workshop.

(8) Short dull moments: Short dull moments. Coated goods can not be full of boring, will bend. The solution is to extend the dull moment.

2. There are snow spots on the goods

(1) print powder too much: print powder too much, can not be completely dissolved by adhesives, coated goods will show a large area of snow points. In this case, it is probably appropriate to increase the amount of glue, or sweep the powder on the print before the film is covered.

(2) the amount of glue is too small: the amount of glue is too small, the whole appearance of the print will show snowflakes. The treatment method is to increase the amount of glue.

(3) The pressure roller pressure is not appropriate: the pressure roller pressure is too high will be at the edge of the printing adhesive extrusion, resulting in the printing edge of snow points; And compaction will also appear snow spots. The treatment method is to adjust the pressure of the pressure roller correctly.

(4) the rubber roller on the dry rubber: the rubber roller on the dry rubber when the amount of glue on the ground is small, will make the covered goods here appear snow point. The treatment method is to wipe clean cots.

(5) There is a rubber ring on the pressure roller: the adhesive extruded from the edge of the printing product or the adhesive extruded from the film hole is stuck on the pressure roller. After a long time, it will form a dry rubber ring. After the printing product relaminating, will appear here small snowflakes. The treatment method is to wipe the pressure roller in time.

(6) There are impurities in the adhesive: if the dust in the surrounding environment is too much, or the adhesive has dry rubber and cut the film debris, there will be snow on the coated goods. So. Special attention should be paid to environmental health; The adhesive should be poured back into the glue barrel sealed, or filtered before the glue.

3. The product has bubbles

(1) The printing ink layer is not dry: first hot pressing again and then glue, but also can extend the film cover date, so that it is boring and complete.

(2) the printing ink layer is too thick: it can be properly added

4.coated goods appear wrinkled

The main reason for the formation of coated goods wrinkled is that the film transmission roller is not balanced, the film two ends of the tension is inconsistent or the edge of the waves, the rubber layer is too thick or electric roller and rubber roller two ends of the uneven, inconsistent pressure, linear speed is not equal, In this regard, methods such as ADJUSTING the transfer roller to balance, changing the film, adjusting the amount of glue and improving the temperature of the drying channel, adjusting the orientation and technical parameters of the electric heating roller and the rubber roller can be adopted separately.

5. The bonding at the edge is not solid

This appearance is mainly present in thick paper coated. Thick paper will have certain bending deformation when rewinding, and the smaller the rewinding diameter, the more significant. Just out of the pressure roller is not dry coated goods will often be bent at the edge of the paper top, forming here is not solid bonding. In order to improve the rate of coated products, we should try to reduce the width of the edge at this moment, to ensure that the width of the bond is not solid in the die cutting mouth range.

6. The goods do not stick well

(1) Improper selection of adhesive, improper setting of adhesive amount, and wrong ratio measurement: reselect the adhesive trademark and coating amount, and accurate ratio

(2) the printing looks bad situation: if there are powder, ink, the ink layer is too thick or not finished the congruent form bad adhesion, usable dry cloth gently wipe the powder, or adding amount of adhesive coating, increase pressure, as well as the selection pressure of field again again glue, or convert the adhesive with the high solid content, or adding adhesive coating thickness, or add drying method, temperature, etc.

(3) The adhesive is absorbed by ink and paper, and the formation of a lack of coating: you can think of setting the formula and coating amount from scratch.

(4) the amount of glue is too little: the amount of glue is less, the solid content is less, and the bonding force is bound to be not good. The treatment method is to increase the amount of glue.

(5) the printing area is large: because of the ink surface lubrication, the adhesive is difficult to wet. Scattered. It's saturated, so it doesn't bond well. The treatment method is: increase the solid content of the adhesive and the thickness of the adhesive layer. Improve the external temperature of the film.

(6) Glue metamorphosis: check the factory date and shelf life of glue before use.

(7) The film exceeds the shelf life

7. Uneven coating

Uneven thickness of plastic film, composite pressure is too small, film slack, some adhesive curing roller in the glue tank swelling or deformation will cause uneven coating; After the onset of the fault, the cause should be quickly found out and the corresponding method should be adopted, which is to adjust the traction force, increase the compound pressure, or replace the film, cots or adhesives.

8. Merchandise goes black

This is mainly now a large area of gold printing and bronzing goods. This is because of the chemical reaction between the particularly vivid elements in the binder and the gold powder. The treatment method is to choose special gold ink or special adhesive, also can be coated after bronzing.