The printing plate used for hose printing is usually a copper plate because the copper plate has a high resistance to printing, and the plate making method is the same as that of a normal copper zinc plate plate.
The hose printing machine is mainly composed of a plate cylinder, a rubber cylinder, an impression cylinder plate of a set of hoses, a conveying mechanism, an ink fountain, and the like.
Hose Printing Because the substrate is non-ferrous metal, the surface of the hose must be printed with a layer of white ink or other background ink before the printing of the graphic, and then the graphic can be printed. After printing the background color Make ink dry quickly. In order to print a few colors later, the Inkjet color is dried by an infrared Clear Plastic Tubes drying device and then printed. The overprint work of the graphic and text is not like the traditional printing on imprinted and simple paper, but the printing on the three printing plate rollers, and overprinting on the blanket cylinder (because the imprinting is real-time printing and Do not overlap, then transfer the three-color ink blots once to the hose on the embossing roller. The embossing roller on the embossing cylinder plate is covered with a hose, but does not rotate on its own. Only after it comes into contact with the rubber roller, can it rotate at the same linear speed as the blanket cylinder. The diameter of the embossing cylinder is the same as that of the blanket cylinder. , but the operation is different, the rubber roller rotates one revolution, and the impression roller rotates 90° to complete the printing of a hose.
After one revolution of the hose, it is separated from the blanket cylinder, the overprinting work of the hose is over, and then infrared rays are applied to make the blot dry quickly and increase the brightness of the blot.
Toothpaste hoses, hose shoe polishes, and medical ointment hoses are printed in this way.
Metal hose printing inks, in addition to heat resistance, light resistance, but also because the hose will encounter extrusions and twists in use, but also often encountered water and moisture, so the ink should also be able to meet the above conditions. Clear Plastic Tubes Different materials in the hose, the ink must also be able to resist the erosion of these substances.
Laminated hoses are the advantages of both materials. They are made of synthetic hoses that have the advantages of both, such as laminated tubes made of aluminum foil and plastic film, which are resistant to moisture and weather. Advantages, can be printed and then laminated, so that the graphic in the plastic film layer, the appearance is very beautiful, but also after printing and forming, changed the method of forming the first curved surface after printing, so you can use photo gravure way Plastic printing, laminating and molding into laminated hoses.
The printing of plastic hoses is very poor due to the poor adhesion of plastic inks, which require surface treatment before they can be printed. Now abroad adopts the hot pressure transfer printing method. The pictures are printed on the transfer paper (ie coated kraft paper). The color sequence is the opposite color sequence of the color printing, and then the coating layer is coated with a heat treatment The adhesive material can be produced, and then the transfer paper printed with the graphic is brought into contact with a curved Clear Plastic Tubes surface and transferred under heat pressure.