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In modern industrial production, the demand for refined processing of medium- and high-viscosity materials is becoming ever more demanding. Fields such as metal pastes, printing inks, conductive inks, adhesives, sealants and lubricating greases are placing unprecedented requirements on particle size distribution, grinding precision, production efficiency and stability. Conventional grinding equipment generally suffers from pain points such as insufficient precision of parameter control, a low degree of automation, non-traceable production data and limited application scenarios, and can no longer meet the processing needs of high-performance fine materials such as nano new materials, precious metal pastes and functional ceramic materials. Drawing on deep insight into industry needs and continuous technological innovation, Changzhou Longxin Intelligent presents the YS-YSS Fully Hydraulic Three-Roll Mill. With the core advantages of precision, flexibility and efficiency, it provides a one-stop precision grinding solution for advanced manufacturing and redefines the technical standard for processing medium- and high-viscosity materials.
Intelligent Manufacturing Gives Rise to New Demands for Precision Grinding
At present, the global manufacturing industry is transforming toward high-end, refined and intelligent production, and the requirements for precision, stability and efficiency in material processing continue to rise across all application fields.
(1) In the metal paste field, the miniaturization and high integration of electronic components require pastes with a narrower particle size distribution and greater dispersion uniformity, in order to ensure core properties such as electrical and thermal conductivity.
(2) In the printing ink industry, high-end products such as UV-curable inks and security inks face ever-rising requirements for color saturation, gloss and adhesion, which depend on the thorough refinement and uniform dispersion of pigment particles during grinding.
(3) Conductive ink, as a key material for electronic printing, has conductivity directly related to grinding precision, which in turn affects the quality and service life of products such as flexible electronics and IoT devices.
(4) Products such as adhesives, sealants and lubricating greases have strict requirements for viscosity control and the degree of particle refinement, which directly determine bonding strength, sealing performance and lubrication performance.
At the same time, the industry's demand for automation, digitalization and traceability in the production process is becoming increasingly prominent. Conventional three-roll mills mostly rely on manual operation, have limited precision of parameter control, and cannot avoid human error during production; production data cannot be effectively recorded or traced, resulting in poor product consistency and fluctuating pass rates. In addition, as environmental policies tighten and production costs rise, enterprises have a more urgent need for equipment that saves energy, reduces consumption, minimizes material waste and raises production efficiency.
The YS-YSS Fully Hydraulic Three-Roll Mill was tailor-made precisely for these market pain points. With core advantages such as digital control, ultra-high-precision grinding, high-capacity output and flexible adaptation to multiple scenarios, it aligns closely with the precision processing needs of advanced manufacturing and provides technical support for the industry's high-quality development.
Working Principle: A Fusion of Hydraulic Drive and Digital Control
The core working principle of the YS-YSS Fully Hydraulic Three-Roll Mill is based on the shear, extrusion and grinding action between three rolls. Through the coordinated operation of a hydraulic system and a digital control system, it achieves efficient, refined processing of medium- and high-viscosity materials.
When the machine runs, the motor drives the three rolls through the transmission system to rotate relative to one another at different linear speeds. Material enters the gap between the front roll and the middle roll through the feed inlet and undergoes preliminary dispersion and grinding under the shear force and extrusion force of the rolls; it then enters the gap between the middle roll and the rear roll for a second, finer grinding pass. Because the rotational speeds of the three rolls increase in sequence, a stable speed gradient is formed. Under the combined action of the shear force generated by the speed difference and the constant pressure supplied by the hydraulic system, the particles are progressively refined until the required grinding precision is reached.
(1) The electro-pneumatic roll pressure system on the machine is the core guarantee of precise grinding. This system uses hydrodynamic roll pressure technology to precisely control the pressure between the rolls through a hydraulic device, ensuring that a constant and repeatable roll pressure is always maintained in the grinding gap, thereby ensuring the uniformity and consistency of material grinding.
(2) The digital control system monitors key parameters such as roll speed, gap and pressure in real time, and automatically adjusts the machine's operating state according to pre-set process recipes, achieving automated closed-loop control of the grinding process.
(3) Once grinding is complete, an automatic scraper blade scrapes the material adhering to the roll surface into a self-aligning discharge box, completing the discharge process.
(4) The machine provides three working positions — "grinding," "mixing" and "disengaged" — which can be switched flexibly according to different processing requirements:
The "grinding" position is used for fine grinding and dispersion;
the "mixing" position provides a pressure-fed gap for materials to mix with one another;
the "disengaged" position allows the rolls to separate for cleaning, greatly improving the machine's operational flexibility and practicality.
Equipment Structure: Compact Design Working in Concert with Precision Components
The YS-YSS Fully Hydraulic Three-Roll Mill features a compact design with a well-conceived overall layout, which both ensures the machine's stability and ease of operation and effectively saves production space.
The machine is mainly composed of a roll system, hydraulic control system, transmission system, digital control system, frame and guarding, and a cleaning system. These components work together to ensure efficient and stable operation.
(1) The roll system is the core working component of the machine. It is manufactured by centrifugal casting and is available in a range of high-end materials — premium alloy, zirconia, alumina, silicon carbide, silicon nitride and others — to meet the grinding requirements of different materials. The cylindricity and concentricity of the rolls are both controlled within 2 μm; this extremely high machining precision provides the foundation for precise grinding. The roll gap can be as small as under 1 μm, enabling ultra-precision grinding of materials with a minimum particle size down to 1 μm.
(2) The transmission system uses high-quality motors and precision transmission mechanisms to ensure the stability and accuracy of roll speed, with multi-stage speed adjustment to suit process requirements.
(3) The hydraulic control system adopts advanced electro-pneumatic control technology and can precisely regulate the pressure between the rolls. The pressure adjustment range is 5–120 N/mm, adapting to the processing requirements of materials of different viscosities.
(4) The digital control system uses a touchscreen as its operating interface and integrates a Siemens programmable logic controller (PLC). It enables precise control of parameters such as roll speed, gap and pressure, supports pressure curve monitoring, and can connect to an MES system for real-time collection, storage and traceability of production data.
(5) The frame is made of aviation aluminum, stainless steel, painted finishes or other materials, and can be customized to customer requirements. The easy-clean frame design (with an optional cleanroom version) meets the requirements of different production environments.
(6) The machine is equipped with a comprehensive automatic electrical protection system, including motor overload protection and roll-in protection devices. The electrically monitored rotating stainless steel guard cover and collection trough effectively protect operator safety and ensure safe, reliable operation.
(7) The cleaning system supports automatic setting of the maximum roll gap and minimum running torque, enabling rapid cleaning of the machine, reducing material residue and improving production efficiency.
Performance Features: A Triple Breakthrough in High Capacity, High Precision and High Flexibility
The YS-YSS Fully Hydraulic Three-Roll Mill achieves multiple breakthroughs in performance, combining the core advantages of high capacity, high precision and high flexibility to create greater value for users.
(1) In terms of high capacity, the machine adopts an ultra-high roll speed design paired with outstanding cooling performance, effectively raising material processing efficiency. Intelligent functions such as automatic scraper adjustment and zero-point setting reduce manual intervention and shorten production setup time, achieving maximum productivity and advanced processing capability. At the same time, the machine's reliable operation and high raw-material yield greatly reduce material waste and improve resource utilization, bringing users significant economic benefits.
(2) High precision is one of the machine's core competitive strengths.
The onboard digital control system can store process recipes, ensuring consistency between production batches; the intuitive control unit makes it easy for operators to set parameters precisely, and the long-term production data trend analysis function provides data support for process optimization.
The extremely high roll precision (cylindricity under 2 μm, concentricity under 2 μm) and precise roll gap control (minimum under 1 μm) ensure grinding precision and enable the processing of products with a narrow particle size distribution, meeting the stringent requirements of high-end manufacturing. In addition, the machine offers reproducibility that conventional three-roll mills cannot match, ensuring the quality stability of every batch.
(3) High flexibility is reflected in the machine's multi-mode operation and customizable design.
The machine supports three roll modes — gap mode, pressure mode, and a combined gap-and-pressure mode — which can be selected flexibly according to the characteristics of different materials and processing requirements.
The linear pressure operating range of 5–120 N/mm delivers outstanding adaptability, handling everything from high-viscosity to ultra-high-viscosity pastes.
At the same time, the housing finish, roll material and scraper blade material can all be customized to user requirements. Scraper blades are available in metal, ceramic, fiberglass and other types, meeting the grinding and discharge needs of different materials.
(4) The machine also offers ease of operation, safety and reliability, and a high return on investment.
Touchscreen control and a graphical interface simplify the operating procedure; process parameter settings are straightforward and easy to understand, improving productivity and reducing operating time.
The comprehensive safety protection system and standards-compliant safety equipment provide reliable protection for operators.
The machine's high-output operation, waste reduction and gentle dispersion of products sensitive to contaminants and temperature give it advantages over other technologies — particularly in the gloss characteristics of printing inks — delivering a return on investment beyond users' expectations.
Technical Improvements: Backed by Multiple Patents, Driving Industry Innovation
The outstanding performance of the YS-YSS Fully Hydraulic Three-Roll Mill is the result of Longxin Intelligent's continuous technological innovation. The machine incorporates several core patented technologies, with optimizations and upgrades at many key points — from motor mounting and roll control to material baffle adjustment and discharge design — comprehensively improving the machine's performance and reliability.
(1) The motor mounting position fine-adjustment mechanism (utility model patent ZL202021925881.5) solves the problem of conventional motor mounting positions being fixed and difficult to adjust precisely. This mechanism enables fine adjustment of the motor mounting position, ensuring precise alignment between the motor and the transmission system, improving transmission efficiency and stability, reducing vibration and noise during operation, and extending the machine's service life.
(2) The self-aligning discharge box (invention patent ZL202010843863.0) and the automatic self-aligning roll material baffle (invention patent ZL201610442589.X) achieve automation and precision in material discharge and baffle adjustment.
The self-aligning discharge box can automatically adjust the discharge angle and position according to the operating state of the rolls, ensuring complete material collection and reducing material waste.
The automatic self-aligning roll material baffle can automatically adjust its fit against the rolls according to material viscosity and grinding requirements, effectively preventing material leakage while avoiding the errors introduced by manual adjustment and improving production stability.
(3) The roll press with controllable inter-roll gap and pressure, together with the roll press capable of precisely controlling inter-roll gap and pressure, form a dual precision control system that achieves high-precision regulation of roll gap and pressure. Through advanced sensing technology and control algorithms, the gap and pressure between the rolls are monitored and adjusted in real time, ensuring parameter stability throughout the grinding process. This provides core technical support for ultra-high-precision grinding and enables the machine to meet the fine-processing requirements of different materials.
(4) The automatic material baffle adjustment device for the three-roll mill further optimizes baffle adjustment performance. Based on real-time parameters such as material feed rate and viscosity, the device automatically adjusts the baffle's position and angle, ensuring material enters the grinding gap evenly, avoiding the uneven grinding caused by localized material accumulation, reducing manual intervention and improving both production efficiency and product quality consistency.
The application of these core patented technologies enables the YS-YSS Fully Hydraulic Three-Roll Mill to achieve breakthroughs at key technical points. The machine's degree of automation, control precision, operating stability and ease of operation all reach the industry's leading level, demonstrating Longxin Intelligent's technical strength and innovative capability in the field of grinding equipment.
Applicable Industries: Full-Scenario Coverage Empowering High-Quality Development Across Sectors
With its outstanding performance and flexible adaptability, the YS-YSS Fully Hydraulic Three-Roll Mill is widely used across multiple advanced manufacturing fields, providing customized solutions for the precision processing needs of different industries.
(1) In the printing ink / UV ink industry, the machine can precisely process products such as UV-curable inks, packaging inks, security inks, sheetfed inks and web offset inks. Through ultra-high-precision grinding, it ensures thorough refinement and uniform dispersion of pigment particles, improving the ink's color saturation, gloss and adhesion and meeting the stringent image-quality requirements of high-end printing. Its high-capacity design also suits large-scale production, raising enterprises' production efficiency.
(2) The electronic paste field is one of the machine's core application scenarios. It can process metal pastes such as silver paste, aluminum paste, nickel paste, copper paste and platinum paste, as well as solder paste, functional inks and similar products. Electronic pastes have extremely high requirements for particle size distribution and dispersion uniformity, which directly affect the conductivity and reliability of electronic components. The narrow particle size distribution control capability and high stability of the YS-YSS Fully Hydraulic Three-Roll Mill ensure that the core performance of electronic pastes meets specification, providing high-quality raw material processing support for industries such as flexible electronics, semiconductors and solar cells.
(3) In the functional materials field, the machine can process materials such as sealants, adhesives, lubricating greases, ceramic slurries and high-performance composites. For sealants and adhesives, the machine achieves thorough mixing and refinement of materials, improving bonding strength and sealing performance; in lubricating grease processing, the precise grinding process ensures uniform grease viscosity, improving lubrication performance and service life; and the fine grinding of ceramic slurries lays the foundation for the forming and performance of functional ceramic products.
(4) In the cosmetics / personal care field, the machine can be used to process products such as lipstick, lip balm / lip gloss, sunscreen, foundation / BB cream, and hair wax / hair pomade. Cosmetics have extremely high requirements for the fineness, uniformity and safety of raw materials. The gentle dispersion technology of the YS-YSS Fully Hydraulic Three-Roll Mill prevents materials from being contaminated during processing while achieving ultra-fine grinding of raw materials, making cosmetics finer in texture and easier to apply and improving the user experience.
In addition, the machine is also suitable for grinding various greases, coatings, pigments, color pastes, vegetable gums, soap and other materials, covering chemicals, light industry, new materials and many other sectors. It provides efficient, precise and stable grinding solutions for enterprises in different fields, helping them improve product quality, raise production efficiency and strengthen market competitiveness.
Precision Grinding, Intelligently Creating the Future
As a representative of high-performance precision grinding equipment, the Longxin Intelligent YS-YSS Fully Hydraulic Three-Roll Mill is market-demand-oriented and technology-innovation-centered. Backed by a range of all-new technologies, outstanding performance features, a compact and rational machine structure and broad industry adaptability, it offers a completely new solution for the refined processing of medium- and high-viscosity materials. The machine not only achieves comprehensive breakthroughs in grinding precision, production efficiency and stability, but also, through digital control, automated operation and data traceability, helps enterprises upgrade their production processes intelligently, lower production costs and improve return on investment.
Longxin Intelligent has always upheld the philosophy of "technological innovation, quality first," working continuously to advance the grinding equipment field and constantly optimizing product performance and service quality. In the future, we will continue to focus on the pain points of the intelligent manufacturing sector, increase R&D investment, and launch more cutting-edge equipment with core competitiveness, providing global customers with higher-quality and more efficient precision processing solutions. Together with industry partners, we will empower the high-quality development of manufacturing and write a new chapter in the field of precision manufacturing.
