Andalusite bricks, as a high-performance refractory material, are mainly composed of natural andalusite and are widely used in high-temperature industrial fields such as metallurgy, building materials, and chemical engineering. They are the core choice for the inner lining of high-temperature furnaces, hot blast stoves, and boilers due to their excellent high-temperature strength, good thermal shock resistance, low creep rate, and outstanding erosion resistance. The forming quality directly determines the core indicators of the product, such as density, compressive strength, and thermal shock resistance. The hardness of andalusite raw materials, the complexity of particle size distribution, and the special fluidity of the mixed materials pose strict requirements on the pressure control accuracy, pressure transmission stability, and process adaptability of the forming equipment. Zhengzhou Haloong Machinery Co., Ltd. has been deeply engaged in the field of refractory material forming equipment for 45 years. Based on the raw material characteristics and forming process pain points of andalusite bricks, it has innovated the technology of servo screw presses to create a dedicated forming solution for andalusite bricks. With the core advantages of the equipment, it solves industry problems and helps global refractory material enterprises achieve high-quality mass production of andalusite bricks, leading the refractory material industry towards high-end, refined, and green transformation.

Andalusite bricks are formed by mixing natural andalusite with clay, corundum, and other auxiliary materials and special binders. The forming process needs to balance "density and structural stability" - ensuring uniform density throughout the green body, meeting the compressive strength requirements of the finished product, and having a reasonable pore distribution, while avoiding the breakage of andalusite particles and the generation of micro-cracks in the green body during the pressing process, to ensure the thermal shock resistance and erosion resistance of the product during high-temperature service. Currently, the technical shortcomings of traditional forming equipment have led to common problems in andalusite brick production, such as uneven density, green body cracking, low qualified product rate, and unstable batch quality, which seriously restrict the industrialization of high-end andalusite bricks. Relying on the third-generation permanent magnet synchronous servo direct drive core technology, Zhengzhou Haloong has upgraded the HLDS series of CNC servo screw presses, specifically addressing the pain points of andalusite brick forming and creating dedicated forming equipment. With the core advantages of precise pressure control, flexible pressure transmission, and intelligent process adaptation, it sets a new quality benchmark for high-end andalusite bricks.

Zhengzhou Haloong has deeply studied the raw material characteristics, forming process logic, and industry upgrade demands of andalusite bricks. It has optimized the HLDS series of servo screw presses with a three-in-one core technology of permanent magnet synchronous servo motor direct drive, static pressure flexible pressure transmission, and intelligent CNC system. The equipment's precision, stability, and adaptability have been comprehensively upgraded, precisely matching the forming requirements of andalusite bricks. It has become the preferred equipment for high-quality andalusite brick mass production, helping refractory material enterprises create high-quality products suitable for high-temperature fields.

Equipped with a core direct drive system of permanent magnet synchronous servo motors, it completely eliminates the inefficient transmission structures such as traditional friction discs and clutches, with an extremely short transmission chain and zero energy loss in energy transmission. The pressure output is stable and controllable throughout the process. The equipment is equipped with a dedicated CNC pressure control module for andalusite bricks, which can digitally and precisely set the impact energy, pressing speed, stepwise pressure application times, and holding pressure duration. The energy repetition control accuracy is ≤±1%, ensuring that the pressure in each forming process is highly consistent, completely eliminating quality deviations caused by manual operation and mechanical fluctuations. In response to the poor fluidity and hard particles of andalusite mixed materials, a customized stepwise flexible pressure application process is designed. It first applies light pressure to quickly expel the residual air inside the green body, then applies pressure stepwise and layer by layer to compact it, and finally maintains pressure for a long time to shape it. This ensures uniform force application in all parts of the green body, including the center, edges, and corners, with density fluctuations controlled within a very small range. It not only ensures the density of the green body but also avoids the breakage of andalusite particles, perfectly balancing the core advantages of high strength and thermal shock resistance of the product. The qualified product rate is increased to over 99%. The equipment adopts a fully enclosed static pressure screw, nut and special heavy-duty bearing transmission structure. During operation, a stable high-pressure oil film is formed for protection, achieving flexible and uniform force application and pressure relief, completely avoiding the severe impact force and stress concentration problems brought by traditional rigid pressurization. The pressurization process is smooth and gentle, with uniform and soft pressure transmission. It can not only fully expel the internal pores of the blank, completely eliminating defects such as porosity, delamination, and cracks, but also gently protect the structure of the andalusite particles, preventing particle breakage and blank cracking, significantly reducing the waste of high-cost raw materials. At the same time, it effectively extends the service life of the mold, reduces material costs, and improves the production efficiency of the enterprise.

It breaks through the structural limitation of the fixed bottom dead center of traditional equipment and adopts a step-by-step forging forming mode. According to the material, size, and structural complexity (standard brick, special-shaped brick) of the andalusite brick, as well as the density requirements, the stroke of the slider, the pressurization depth, and the applied pressure can be flexibly adjusted to precisely match the forming needs of various andalusite bricks, covering the full range of production scenarios for high-end refractory materials. There is no need to worry about the problem of uneven pressurization caused by deviations in raw material filling and differences in andalusite particle size. Combined with a rapid mold changing system, mold changing is convenient and efficient, perfectly adapting to the flexible mode of multi-variety and batch production, meeting the batch supply needs of the high-end market.

The equipment is equipped with a dedicated forming parameter database for andalusite bricks, integrating the optimal forming process parameters for various specifications, different materials, and different density requirements of andalusite bricks, covering the forming parameters of common products such as ordinary dense type, high-strength wear-resistant type, and special-shaped andalusite bricks. Operators can retrieve them with one click, eliminating the need for repeated debugging and exploration, significantly reducing the interference of human factors on product quality. All forming parameters can be permanently saved and reused in batches, ensuring that the density, compactness, and dimensional accuracy of each batch and each product are highly consistent, easily meeting the strict quality requirements of the high-end market at home and abroad, helping enterprises smoothly open up the overseas high-end refractory materials market.

Compared with traditional friction presses, the Haloong servo screw press adopts an intelligent mode of on-demand start-stop and sleep energy saving. The servo motor only operates during the pressing process, with zero energy consumption in the standby state, achieving a comprehensive energy-saving rate of over 55%, significantly reducing the electricity cost of andalusite brick production, meeting the green and low-carbon development needs of the refractory materials industry. At the same time, the static pressure transmission structure has minimal wear, combined with a fully automatic forced lubrication system and an oil shortage alarm device, achieving maintenance-free operation, with a low equipment failure rate and a service life far exceeding that of traditional equipment. The later maintenance cost is reduced by more than 40%, comprehensively compressing production, maintenance, and material costs, helping enterprises achieve a green, low-carbon, and efficient profit-making production model.

The equipment is equipped with standardized industrial communication interfaces, which can be seamlessly connected with automatic and precise feeding machines, closed-loop distribution machines, intelligent demolding machines, non-destructive testing equipment for blanks, and constant-temperature conveyor lines, building an automatic and intelligent forming production line for andalusite bricks, achieving unmanned control throughout the process from distribution, pressing, pressure holding, demolding to blank transfer and inspection, minimizing human intervention. It not only avoids damage to the blank caused by manual operation but also ensures forming accuracy and production efficiency. At the same time, it supports remote monitoring, parameter adjustment, fault warning, and production data traceability functions, facilitating domestic and foreign customers to remotely and in real-time control production progress and product quality, fully in line with the global refractory materials industry's trend of intelligent, digital, and green transformation, helping enterprises build an intelligent production base for high-end andalusite bricks.

As a leading enterprise in the domestic electric servo screw press field, Zhengzhou Haloong Machinery Co., Ltd. has been focusing on the technological innovation of refractory material forming equipment for 45 years, deeply exploring the forming process pain points of high-end refractory products such as andalusite bricks, and insisting on empowering the refractory materials industry with customized technology. The Haloong HLDS series of CNC servo screw presses cover the full tonnage range from 200T to 1600T. According to the customer's requirements for andalusite brick material, specifications, production capacity and density, we can provide one-to-one customized forming solutions, fully meeting the mass production needs of various andalusite bricks and adapting to the supply of refractory materials in different high-end high-temperature fields.