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What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

       In gravure printing production, due to the volatilization of solvent in the ink tank, the uniformity of ink is reduced, and the surface is easy to form ink sheets and ink blocks. What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

      After the plate roller is brought on, the scraper is not easy to scrape clean, resulting in defects such as plate paste, knife line and so on. How to solve this problem? Let the ink “flow” and keep mixing. Naturally, this situation can be avoided.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

       There are two ways to make the ink move. One is to use the ink circulation pump to make the ink circulate; The second is to place an ink stirring rod in the ink tank to make the ink flow in the ink tank.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

       The former is the external circulation of ink, which has high cost and increases the factors of failure.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

       It is generally combined with the addition of solvent and viscosity automatic control system, which is not introduced in this paper. From the perspective of making the ink uniform, the latter is the most economical and effective measure.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

      The ink stirring rod is generally a hollow rod made of aluminum alloy. There are spiral continuous protrusions on the surface, that is, the so-called “ripple” or unfolding line. What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

      There are magnetic materials at both ends, which can be adsorbed on the plate roller. When printing, the ink stirring rod floats on the ink surface.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

        When the plate roller rotates, it rotates in the opposite direction by adsorption. When rotating, the ripple drives the surface of the ink to make the surface ink move, so as to beat the ink evenly and avoid the corresponding quality problems of the printed products.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

The quality of ink mixing stick is mainly determined by the following two points:What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

1. Effect. The ink stirring of the ink stirring stick mainly depends on the spreading line, that is, the so-called ripple. Its size, angle, structure and the rotating speed of the ink stirring stick determine the ink stirring effect. What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

     Generally speaking, the faster the rotating speed of the ink stirring rod, the better the ink stirring effect.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

        The larger the expansion line size, the larger the angle, and the better the ink stirring effect. However, the expansion line is too large, the magnet part is far away from the plate roller, the magnetic force is weakened, What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

      it is not easy to absorb, and the rotation speed of the ink stirring rod is reduced (lost), but the effect is poor. What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

      In addition, the specific gravity is small, that is, the higher the floating of the ink stirring stick in the ink, the better the effect.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

2. Life span. The ink stirring stick is generally hollow because it needs to float on the ink surface. If the seal leaks and the solvent enters the ink stirring stick, it will sink and lose the stirring effect. What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

      Therefore, the seals at both ends should be corrosion-resistant. In addition, the surface wear resistance is better.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

3. Magnetism. The adsorption of the ink stirring rod to the plate roller mainly depends on the magnetic strength. On the one hand, the internal magnet should be larger. IWhat Kind Of Ink Mixing Stick Can Make The Ink More Uniform

       In addition, the specific gravity should not be too large because of the large magnet. It is a good way for some manufacturers to add a rubber ring to control the distance, but attention should be paid to the swelling of rubber.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

4. Distance. The ink mixing rod shall be at a proper distance from the plate roller. Too close, too little ink at the crevice, not easy to stir; If it is too far away, the magnetic force is reduced and it is easy to lose rotation.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

At present, there are generally the following types of ink stirring sticks on the market.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

1. Plastic ink stirring stick. It is common in imported products. The surface is made of wear-resistant plastic sheet and the internal paper core is used. The quality is quite good and the price is relatively high, generally thousands per meter. What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

It is said that at present, some people in China have imitated it, but because there is no good wear-resistant plastic material, the service life is relatively poor. In addition, the ink stirring effect is not very good.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

2. Twist the ink stick around the rope. Generally, it is made of general-purpose aluminum tube, and the surface is wound with a wire rope as the unfolding line. This kind of product has two defects: What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

       ① because it is wound with wire rope, the unfolding line angle is relatively small; What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

      ② the wire rope will infiltrate ink and form dry knot when it is shut down; when it is used again, the dry lump may be mixed with ink and cause print line marks.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

3. Single wire aluminum alloy corrugated ink stirring stick. The structure is the same as that of the rope winding ink stirring stick, but the wire rope is changed into an aluminum alloy spiral protrusion, because there is only one unfolding wire, the angle is small, and the ink stirring effect is relatively poor.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

4. Eight wire aluminum alloy corrugated ink stirring stick. Aluminum alloy rotary extrusion profile, with 8 unfolding lines on the surface and large angle, is the product with the best inking effect at present. What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

       In addition, the seals at both ends of such products are not only corrosion-resistant (the manufacturer once promised to guarantee the service life of two years), but also have good wear resistance.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

        If the iron scraps and other sundries adsorbed by the ink stirring stick are cleaned in time, the service life is generally 2-3 years, which really saves the ink homogenizing cost of the manufacturer. What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

       This is also the product that most color printing factories choose at present. At present, lb-03 eight wire ink stirring stick of Beijing landmec company is such a product.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

       Customers often ask the author about the ink return direction of the eight wire corrugated ink stirring stick. In fact, it is the problem of whether the ripple has an interface.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

       If the left and right rotating ripples meet in the middle, the ink will flow from the middle of the ink tank to both ends or from both ends to the middle during operation (the placement direction needs to be reversed); What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

       If the ink stirring stick is through grain (i.e. there is no interface, whether left or right), the ink will flow from one end of the ink tank to the other end during operation. According to the author’s experience, these two ink return methods have little effect on the uniformity of ink.What Kind Of Ink Mixing Stick Can Make The Ink More Uniform

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