Compared with ordinary refractory bricks, corundum bricks feature high raw material hardness, poor fluidity and high forming difficulty, imposing extremely high requirements on the pressure control precision, uniform force transmission and process adaptability of forming equipment. At present, traditional forming equipment in corundum brick production is generally plagued by numerous pain points, which severely restrict the industry's high-end and large-scale development: Traditional friction presses rely on mechanical transmission with unstable energy release, failing to precisely control the pressing force and speed. This easily leads to insufficient air exhaust, excessive internal pores and large density deviation in corundum brick green bodies, resulting in cracks, spalling and other defects after subsequent sintering; Ordinary hydraulic presses have slow response and cannot adapt to the stepped forming requirements of corundum bricks of "light pressing for air exhaust and heavy striking for forming". In addition, uneven force transmission causes obvious density differences between the edge and center of green bodies, affecting the high-temperature service life of products; Some forming equipment has a low degree of automation and relies on manual parameter adjustment, which not only leads to high labor costs, but also easily results in inconsistent performance of products in the same batch due to human operation errors, making it difficult to meet the standardization and consistency requirements of high-end domestic and foreign markets for corundum bricks.

With the global green and high-end transformation of high-temperature industries, the demand for high-end corundum bricks in iron and steel, glass, petrochemical and other industries has been rising continuously. Especially in overseas markets such as Europe, North America and Southeast Asia, more stringent standards have been set for the density uniformity, dimensional accuracy and service life of corundum bricks, and traditional forming equipment can no longer adapt to the industry's development needs. Against this backdrop, relying on 45 years of equipment R&D and manufacturing experience and combining the characteristics of corundum brick forming processes, Zhengzhou Haloong has carried out special optimization and upgrading of servo screw presses and launched exclusive equipment adapted for the forming of corundum bricks (including high-alumina corundum bricks, zircon corundum bricks, etc.). With the core advantages of precise pressure control, intelligent adaptation and high efficiency and energy saving, it has become the core support for corundum brick enterprises to break through development bottlenecks and seize the high-end market, demonstrating the technical strength of "Haloong" as the top brand of electric screw presses.

As a national patented product, the HLDS series servo screw presses of Zhengzhou Haloong adopt the third-generation permanent magnet synchronous servo motor direct drive technology, and have been specially optimized for the raw material characteristics and forming process difficulties of corundum bricks. They are perfectly suitable for the mass forming and customized production of various corundum bricks, meeting both the large-scale mass production of ordinary corundum bricks and the precision forming of special-shaped and thick-walled high-end corundum bricks. They comprehensively solve the forming pain points of corundum bricks and lay a solid foundation for product quality.

Adopting a permanent magnet synchronous servo motor direct drive design and abandoning the traditional clutch and gear transmission structures, the presses realize the digital and precise control of pressing speed, pressure and stroke, with an energy repeat control accuracy of ≤±2.5%, reaching the international advanced level. Aiming at the characteristics of poor fluidity and difficult air exhaust of corundum brick raw materials, the equipment can preset a stepped forming process of "multiple rounds of light pressing for air exhaust and final heavy striking for forming" through programs, precisely controlling the striking force and speed of each round to fully exhaust the air inside the green body. This ensures uniform density from the center to the edge of corundum brick green bodies, with the density coefficient of variation controlled below 1.0%, effectively avoiding cracks, delamination, spalling and other problems after sintering, greatly improving the high-temperature strength and corrosion resistance of corundum bricks and extending their service life. Meanwhile, the servo motor has a strong overload capacity, allowing a load twice the nominal pressure, and can adapt to the compaction requirements of high-hardness corundum raw materials.

Breaking through the structural bottom dead center limitation of traditional presses, the equipment adopts a non-fixed bottom dead center design, eliminating the risk of equipment overload and jamming caused by dimensional deviation or uneven mixing of corundum brick raw materials. The forming parameters can be flexibly adjusted through digital programs to adapt to the forming needs of corundum bricks of different materials such as high-alumina corundum bricks, zircon corundum bricks and chrome corundum bricks, as well as products of various specifications including straight bricks, curved bricks and special-shaped bricks. It is especially suitable for the layered compaction forming of thick-walled corundum bricks, ensuring consistent compactness of all parts of the green body and controlling the dimensional accuracy error within ±0.5mm, meeting the dimensional standardization requirements of high-end domestic and foreign markets for corundum bricks. At the same time, the equipment can realize the free conversion of high and low speeds in a single stroke, completely simulating the precision of manual operation and further improving the forming quality.

Adopting a fully enclosed static pressure screw, nut and bearing transmission structure, a stable oil film is formed for protection during operation. Combined with a fully automatic forced lubrication system, equipment wear is effectively reduced, and the service life is more than doubled compared with ordinary screw presses. With a short transmission chain and simple structure, there are no vulnerable and consumable parts such as friction disks and gearboxes, bringing convenient later maintenance and extremely low maintenance costs. The equipment can adapt to the high-intensity operation needs of large-scale corundum brick production for a long time, with the failure rate reduced by more than 60%, ensuring continuous and stable production and reducing downtime losses. Meanwhile, the equipment runs smoothly with no vibration at low speed, avoiding green body density deviation caused by vibration and further ensuring forming precision.

Equipped with the independently developed intelligent production management system of Zhengzhou Haloong and standardized industrial communication interfaces, the presses can seamlessly link with upstream and downstream equipment such as automatic feeding systems, raw material proportioning systems, mold release agent spraying equipment, automatic part-picking robots and green body inspection equipment, realizing the full-process automatic and digital management and control of corundum brick forming. The equipment can receive real-time data such as upstream raw material proportioning and feeding speed, and automatically adjust forming parameters to avoid parameter deviations caused by manual intervention; After the forming is completed, it sends instructions to the part-picking robot synchronously to achieve seamless connection between demolding and part picking, reducing the damage rate of corundum brick green bodies (to below 0.5%). In addition, a built-in high-precision data acquisition module with a sampling frequency of up to 100 times per second can collect key data in the forming process in real time and upload it to the central control system to form a full-process quality traceability system, ensuring that each batch of corundum bricks is traceable and controllable, and greatly increasing the product qualification rate to over 99%. Besides, the system supports remote monitoring and parameter debugging, facilitating the off-site production management of domestic and foreign customers. It is simple and easy to operate, and the one-button operation does not require skilled operators.

Relying on the core advantages of servo direct drive technology, the equipment realizes the "on-demand start and hibernation energy saving" mode, operating only during forming operations and entering hibernation during processes such as feeding, demolding and mold cleaning with no invalid power consumption. It saves more than 60% energy compared with traditional friction presses, with a motor efficiency of ≥95%, greatly reducing the energy consumption costs of corundum brick enterprises. Meanwhile, the slider speed is extremely fast when the equipment approaches the bottom dead center, enabling the forming to be completed in an instant before the corundum brick raw materials cool down. The short contact time with the mold reduces mold wear and extends the mold service life by more than 30%, further compressing the comprehensive production costs of enterprises. In addition, the equipment operates without transmission noise, greatly improving the workshop working environment, conforming to the domestic and foreign industry trends of green production and low-carbon development, and meeting the Emission Standard of Air Pollutants for Refractory Industry (GB 41618-2022) and overseas environmental protection standards.

As a core category of high-end refractory materials, the quality of corundum bricks is directly related to the safe production and green transformation of global high-temperature industries, and the upgrading and iteration of forming equipment is the core driving force for promoting the high-end, standardized and large-scale development of the corundum brick industry. Having deeply cultivated the field of refractory forming equipment for 45 years, Zhengzhou Haloong has always adhered to the concept of "Starting with Design, Excelling in Technology, Focusing on Processing, and Succeeding in Assembly". Relying on scientific and technological progress, and by virtue of rigorous process procedures, complete testing methods and a sound management system, it has continuously promoted the technological innovation of servo screw presses. Aiming at the forming needs of high-end refractory materials such as corundum bricks, it creates exclusive solutions to help refractory enterprises break through technical bottlenecks.