Blue-style grinder achieves efficient grinding of ink fineness.

How it works:

Blue grinder is a kind of wet dispersion grinding equipment widely used in fine chemical fields such as inks, coatings, pigments, etc. Its core working component is a grinding basket with a high-speed rotating impeller filled with a specific specification of grinding media (e.g. zirconium beads). When working, the impeller rotates at high speed to generate a strong centrifugal force, forming a strong vortex circulation between the grinding medium in the basket and the slurry to be ground (pre-mixed ink raw materials). The slurry is subjected to violent shear, extrusion and collision between the grinding media, so as to break up the pigment aggregates, realize the reduction of particle size and uniform distribution, and finally achieve the purpose of reducing the fineness of the ink.

Achieving efficient grinding of ink fineness requires collaborative optimization of multiple process parameters. The grinding efficiency and final fineness are not determined by a single factor, but by a combination of multiple variables.

First of all, the size and filling rate of the grinding media are the basis. Typically, smaller media sizes provide more contact points, which is beneficial for finer particles, but affects the throughput accordingly. The media filling rate needs to be within a reasonable range, too low will lead to insufficient grinding efficiency, and too high may hinder the slurry cycle. Secondly, the linear speed of the impeller is crucial. The linear velocity v can be calculated by the formula v = π × D × n, where D is the impeller diameter and n is the rotational speed. Higher linear velocities produce greater shear forces, but too high speeds can lead to a sharp rise in temperature and media breakage. In addition, the initial degree of dispersion, solids content, and grinding time of the material need to be adjusted according to the characteristics of the formulation. A simplified process parameter relationship can be expressed as: final fineness ∝ f (media size, fill rate, linear speed, time, material properties).

Ink fineness is a key indicator for evaluating its printability and film forming quality, usually measured in micrometers (μm) and measured by a scraper fineness meter. Relevant industry standards (such as GB/T 13217.3) have clear requirements for the fineness of various types of inks. The closed circulation grinding mode of the Blue grinder can effectively avoid solvent volatilization and environmental pollution, while its strong shear force can efficiently break up pigment aggregates, so that the ink fineness can be stable to the high level required by the standard (e.g., less than 10 μm or even less). Its strong process controllability is also conducive to ensuring the consistency of fineness in different batches of products.

Compared with some traditional grinding equipment, the blue grinder shows many characteristics in ink grinding. The grinding basket can be quickly raised and lowered for easy cleaning and color change, reducing cross-contamination and downtime. The enclosed operation also increases production safety. During operation, attention should be paid to controlling the temperature during the grinding process, and if necessary, a cooling system should be installed. At the same time, according to different ink systems (such as solvent-based, water-based), it is necessary to choose the appropriate abrasive media material (such as zirconia and stainless steel) to resist corrosion and wear.

Typical craftsmanship

Through its unique structural design, the Blue Grinder provides a reliable solution for efficient grinding of ink fineness. By precisely controlling key parameters such as grinding media, rotation speed, and time, high-quality ink products with fineness and uniform distribution can be stably produced. Its easy cleaning and airtight operation also adapt to the comprehensive requirements of modern industrial production for efficiency, quality and environmental protection. In practical applications, process optimization in combination with specific ink formulations is the key to giving full play to equipment efficiency.