With the rapid development of medium and high-viscosity fine chemical materials such as offset printing ink, screen printing ink, concentrated ink and UV-curable ink, performance requirements for grinding equipment have advanced from basic usability to a new stage featuring high efficiency, stability, fineness and intelligence. As the market demands higher product fineness, uniform dispersion, batch consistency and production efficiency, traditional bead mills present prominent drawbacks when processing high-viscosity materials, including low grinding efficiency, frequent blockage, difficult temperature control and complicated color change and cleaning procedures. These pain points greatly restrict the industrialization of high-end inks and pigment systems.

  

At present, the global market for medium and high-viscosity inks keeps expanding. In particular, there is a growing and urgent demand for narrow particle size distribution, uniform dispersion, and low-temperature grinding for heat-sensitive materials in environmentally friendly water-based inks, high-solid-content UV inks and nano-scale colorants. Nevertheless, conventional equipment generally suffers from low grinding media filling rate, insufficient shear force and vulnerable clogging of the separation system, resulting in long production cycles, high energy consumption and frequent maintenance. Accordingly, the development of an ultra-fine grinding machine specially designed for high-viscosity materials, featuring high power, high rotating speed, high wear resistance and large-flow non-clogging operation, has become a key breakthrough for industrial technological upgrading.

   

Against this backdrop, backed by years of technical accumulation and innovative R&D in the field of wet grinding, Longxin Intelligent has officially launched the new-generation WSP-K high-viscosity universal ultra-fine bead mill. Centered on a number of patented technologies, it redefines the ultra-fine grinding standards for high-viscosity materials, and delivers efficient, stable and intelligent solutions for customers in the ink, pigment, dye, coating and related industries.

The WSP-K high-viscosity ultra-fine universal bead mill adopts a high-performance pin-type grinding structure. Built on the design concept of centrifugal separation + annular chamber, it breaks through the limitations of traditional disc-type bead mills.

(1) The core grinding chamber features a slender golden-ratio design. Combined with a dual cooling system for both rotor and stator, it realizes precise temperature control in the grinding zone, effectively preventing gelation or deterioration of high-viscosity materials caused by friction heat. It is especially suitable for the continuous production of heat-sensitive materials such as UV inks and high-solid-content concentrated inks.

  

(2) Adopting a horizontal feeding and bottom discharging flow channel design, materials enter the grinding chamber horizontally. Driven by the high-speed rotating pin stirring shaft, materials come into full contact with zirconia beads to generate intense impact and shearing force. The discharge port is located at the bottom of the grinding chamber on the mechanical seal side. Relying on centrifugal force, it achieves efficient separation of grinding media and materials, thoroughly solving the industry bottleneck of screen clogging with high-viscosity materials, and enabling large-flow, non-clogging, continuous and stable operation.

  

After startup, medium and high-viscosity ink materials are horizontally delivered into the grinding chamber by the feeding system, and fully mixed with 0.5–2.0mm high-wear-resistant zirconia beads filled inside. The rotor assembled with composite pins rotates at high speed and performs ultra-fine material treatment through the triple effects of impact, shearing and grinding:

(1) Centrifugal force generated by high-speed rotating pins drives zirconia beads to form high-intensity turbulence, delivering strong impact on material particles to break up agglomerates;

(2) The precise gap between pins and the stator forms a powerful shearing field, cutting large particles into fine fragments; (3) Collision and friction between zirconia beads further refine particles to ensure uniform particle size distribution.

  

During the grinding process, the dual cooling system of rotor and stator operates synchronously. The internal circulating heat exchange medium rapidly absorbs grinding heat, keeping the chamber temperature steadily within the process range and preventing composition changes of heat-sensitive inks (e.g., UV curable inks) under high temperature.

   

Fully ground materials are efficiently separated from zirconia beads via a self-cleaning screen system. The processed ultra-fine materials are discharged from the outlet for subsequent production, while grinding media flow back to the grinding chamber under centrifugal force for continuous circulation. The whole process realizes fully automatic operation: continuous feeding – high-efficiency grinding – automatic separation – stable discharging.

The WSP-K model integrates a number of patented technologies developed by Longxin Intelligent, comprehensively upgrading the equipment in grinding efficiency, operational stability and maintainability.

 

(1) High-efficiency Pin-Type Bead Mill (Patent No.: ZL 2018 2 0541378.6) Adopting an upgraded pin-type structure with optimized pin layout and flow field design, it increases energy input density and strengthens the crushing and dispersion capacity for high-viscosity materials. Supported by a high-grade power system, it operates at high rotating speed and high media filling rate, greatly boosting grinding efficiency per unit time.

 

(2) Composite Pin for Bead Mills (Patent No.: ZL 2022 2 1165367.5) Featuring innovatively structured pins made of composite materials with special geometric shapes, it delivers high structural strength and superior wear resistance. The specially treated surface reduces material adhesion, improves shearing efficiency, extends service life and cuts maintenance costs. It is highly suitable for grinding high-hardness and highly abrasive materials such as carbon black and organic pigments.

 

(3) Bead Mill with Self-cleaning Filter Screen (Patent No.: ZL 2022 2 1128727.4) Equipped with a patented dynamic screen media separation system with self-cleaning function, it effectively prevents clogging caused by material accumulation on traditional static screens. The system operates stably under high-flow conditions and supports flexible selection of 0.5–2.0 mm zirconia beads to meet diverse fineness requirements. It enables precise particle size control and satisfies the strict ultra-fine dispersion standards of high-end inks.

 

 

(1) Finer and More Uniform Grinding The pin-type structure strengthens the impact and shearing force of zirconia beads on materials. Combined with the tapered grinding tank design, it ensures uniform force on materials inside the chamber, delivering narrow particle size distribution and excellent dispersion results.

 

(2) Wide Viscosity Adaptability Capable of processing high-viscosity materials up to 15,000 cps, it covers multiple application scenarios including offset inks, screen printing inks, automotive coatings and furniture paints.

 

(3) Efficient Temperature Control & Stable Quality Built-in optional integrated internal circulation cooling and heating system realizes precise temperature regulation. It ensures heat-sensitive materials are ground within a safe temperature range and guarantees consistent product quality.

 

(4) Easy Operation & Low Maintenance Equipped with automatic pressure protection and all-round electrical protection systems for safe and reliable operation. Color change and daily cleaning are simplified, greatly reducing downtime and improving overall production efficiency.

   

As an innovator in wet grinding technology, Longxin Intelligent always adheres to customer-oriented development driven by technological innovation. The launch of the WSP-K high-viscosity ultra-fine universal bead mill not only solves multiple industry pain points in high-viscosity material grinding, but also marks a solid step forward for domestic high-performance grinding equipment in refinement and intelligent upgrading.

We sincerely invite global partners in the fields of inks, pigments, coatings and new materials to experience the grinding revolution brought by WSP-K. Choosing Longxin Intelligent means choosing high efficiency, stability and sustainable future development. Let us join hands and explore infinite possibilities through technological innovation.