Printing technology , dialysis ink foaming 4 big "really fierce"!

In carton factories, the use of water-like ink often encounter ink foaming problems, which is a costly failure, will cause equipment down. In order to minimize the probability of ink foaming, this paper analyzes the causes of ink foaming and the corresponding solutions.'
what is ink foaming?
ink foaming is the ink in the cycle to produce foam, once the amount of foam will affect the printing quality, such as printing color virtual, printing white, the most common of which is the pinhole phenomenon .
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Consequences of ink foaming
Customers don't usually complain about poor print quality because the ink foams, they only complain about color consistency, overprinting, edge clarity, inability to recognize barcodes, or print defects.Because the ink foaming will not only have foam in the ink barrel, for the ink tank will also have, the mesh roller and the middle cycle of the rubber roller ink will also be produced, more foam will affect the flow. In addition, the uniformity of the ink will also be affected, more serious when the lack of ink supply leads to the production of printed waste. Therefore, we must pay attention to the foam in the ink.three
the four real killers of ink blistering
Question 1: Air
First we consider what problems air will cause us. When too much air is incorporated into the ink in the supply pipe, it can cause the ink to foam.
solution
: so we have to check that the ink pump suction end gaskets and pipes are good and need to be repaired or replaced if necessary.2: Ink pumps
pressure of the ink pump can also cause the ink to foam. Because the air pressure will cause the ink to splash and bubble.
solution
: such a problem is better to solve, reduce the air supply pressure can be. Therefore, the production must take into account the pressure of the ink pump, to prevent the occurrence of ink foaming.:
3: Scraper
When we use a scraper, gaps are caused by incorrect installation or wear, which makes it easy to enter the air, causing the ink to foam.
solution
: At this point we need to replace the scraper to ensure the smooth supply of ink.Problem 4: Viscosity
ink formula is also one of the main causes of ink foaming, ink sticky too high will also cause ink foaming, ink viscosity is high, fluidity or stirring too much, it will produce foaming phenomenon. At this point we need to reduce the viscosity of the ink. But when we add too much water to the ink, bubbles are also caused by the low stickiness of the ink.
solution
: So we have to reasonably control the viscosity of the ink, usually about 15 seconds. Ink use the best configuration is low viscosity high concentration of such ink foaming phenomenon will be less, followed by the machine equipped with desmoulation agent for ink deblistering control.