Composite film printing 'concave' technique, from now on to printing the electives

1, the correct selection of anilox roll is very important in the production of flexo, anilox roller and plate matching is very important, must be to ensure that the plate on minimum network ( Circular network) The diameter is greater than the net hole opening roller diameter, this is the most basic requirements. In actual production, the theoretical calculation method, and can be used by a known plate screen density and minimum percentage points, to calculate the minimum dot area, reuse the area of a circle formula dot diameter, and compared with net hole opening diameter roller, to decide whether the match. Plate and line number, for example, to 150 line/inch, minimum dot 1%, can be obtained by calculation the smallest dot diameter of 19. 1μm。 The above method is for circular outlets, chain outlets, square node also has its own theoretical calculation method. Empirical method is to sum up experience by mass production, and thus to determine the appropriate anilox roll parameters. Flexo line count anilox roll configuration by the flexible packaging enterprises generally has only a fixed number of gears, operators can after a period of groping summed up some experience and correct selection of anilox roll have some help. 2, choose a suitable hardness of the hardness of the stick tape adhesive tape edition of rigid, neutral and soft three, in the actual production shall, according to the page by selecting suitable hardness paste version of the tape. General print using neutral posted version of adhesive tape; Printing high fine mesh image, plus the number of network cable should use soft paste version of the adhesive tape; When printing field, line, should use hard to stick adhesive tape, When mesh image with field, the lines on the same plate, for both the printing effect, should try to use neutral or neutral partial hard stick tape. 3, printing pressure adjustment and control is the key printing pressure mainly includes two aspects, one is between the anilox roller and plate cylinder pressure, the second is embossing roller pressure between the centre and the plate cylinder. Both printing pressure is very important, between plate cylinder and center impression cylinder pressure is the main cause of flexo printing dot increases; Anilox roller and the pressure between the plate cylinder is too big, ink, easy edge node is made with ink, causing the dirty version. Only light pressure printing condition, can guarantee the stability of required for the printing effect to achieve. Each set of pressure regulation requires at least & other; Throughout the two into a refund &; Can get the pressure. In flexo printing machine speed and pressure state, the first manual regulation anilox roll and the pressure between the plate cylinder, anilox roller pressure after observation plate uniform layout whether sufficient inking; Then adjust the embossing roller pressure between the centre and the plate cylinder, the plate cylinder pressure after observation on substrates, until on the complete graphic imprinting; Then, the anilox roll back pressure, to be seen on the substrates by mark disappears, again the anilox roller pressure, slow until substrates on the full uniform graphic imprinting in which stop the pressure; And then to the plate cylinder slowly back pressure and slow pressure once again, if observed on the substrate along the axial appeared almost at the same time graphic imprinting, and layout by complete, immediately stop the pressure; At this point, pressure adjustment. According to this method of operation, can guarantee the light pressure printing state.