We will inevitably encounter all kinds of big or small the problem in the process ofusing screen printing machine, some more serious problems can be directly to theproduction of silk screen printing machine manufacturers directly to solve some small problems, some suggestions to often appear, direct solution, so whether inproduction and daily maintenance will be very convenient.

Below we have a look screen printing machine in the use of process problems easier place.

A, ink unevenness is going on and Solutions

Ink film thickness unevenness, the reason is various, printing ink in ink deployment is bad, or normal deployment ink into the skin, printing, because the role of solventswelling, softening, should be thoroughly ink mesh plug, the version of the film role,so that the ink can not pass.

In order to prevent the fault, the deployment of ink (especially old ink), to use thefilter again before use. Has been used in the re - use of a printing plate, must be completely removed in version box attached to the old ink. After the printing plate,fully washing (including scraper). According to the above requirements if do, inkingthe ancient wood and book would not have happened.

If the board of front tip of a damage, the direction of movement along the blade willappear a trace. Especially in printing transparent content, will appear obvious inkunevenness. So, the front end must be very good protection to the board, the damage will not occur, if damaged, must carefully for polishing machine.

Printing the concave and convex platform will also affect the inking uniform. Convex are ink layer thin, concave ink layer thick, this kind of phenomenon known asuneven inker. In addition, the back of the substrate or printed on a sticky dustwords, also can produce the fault.

Two, the formation of air bubbles and Solutions

The substrate may sometimes appear bubble in printing ink, the main causes of the bubble for several reasons

Printing prepress processing bad. The substrate surface dust and grease and other substances.

Ink in the bubble. To adjust the ink, adding solvent, additive mixing, ink mixed with some bubble, if placed no matter, low viscosity ink will naturally deaeration, high viscosity ink is some not natural deaeration. These bubbles in printing ink, because of the transfer and natural elimination, some have become more and more large.To get rid of these bubbles, to use the defoaming agent, ink consumption amount of foaming agent is 0.1 ~ 1%, if more than a specified amount but will play the roleto the foaming.

Ink transfer even foaming, as long as the substrate is liquidity, good wettability andink, printing ink film surface play bubble will gradually eliminate, ink printing ink filmformed flat. If the ink bubbles do not eliminate, the ink film will form an annularuneven film surface. General ink bubbles through the screen, the screen effect candeaeration. In addition, mixing ink with hot water or boiling water will have gooddefoaming effect.

Red, blue, green, transparent ink, because the organic pigment microparticleamount less, characteristics of these ink binders with foam. If you add the corresponding thinners, tackifier or withdrawal adhesives, also can make the ink into a stable good printability of ink.

Printing speed is too fast or the printing speed is not uniform. Appropriate to reduce the speed of printing, to maintain homogeneity of printing speed.

If not the above several methods of eliminating printing in the bubble, can consider to use other types of ink.

Three, silk screen print Ceng dirty causes and Solutions

Screen printing in the printing, sometimes rubbed against dirty phenomenon, the main reason is due to the ink drying is not sufficient to elicit. Usually in the oxidative drying printing ink, rubbed against dirty phenomenon more, this is because the screen printing, ink layer thick, while the oxidation drying inks surface drying speedand drying slow, when the print and print or print contact with other objects, it willget dirty. General desiccant desiccant cobalt or lead to join in the ink can improve the ink drying speed, to prevent the emergence of rubbed against dirty role. In addition, in print piling up, not too much overlap stacked (due to print too muchbacklog, rubbed against dirty is also easy to produce), printed in stacking must befully dried. The use of evaporation drying inks, can reduce rubbing against dirtyphenomenon. Strictly comply with process requirements at the time of printing,operate strictly according to the operating rules, but also a way of avoiding against the dirty phenomenon.

Today and share this three problems and solutions, please pay attention to the three problems in the process of using screen printing machinery and timely solve.