Hangzhou Machine Tool Group Co., Ltd. recently received an invention patent certificate entitled “A machine tool spindle air pressure seal deviceâ€. This patent is a technical solution that combines the technical difficulties in the development of new products with the company's chief engineer, Luo Guangjin, and combines product innovation. In the past, the company's series of CNC forming grinding machines, because of the slow-feeding strong grinding process, equipped with high-pressure, large-flow cooling devices, the workpiece grinding zone coolant and its impurities splash, the environmental conditions are harsh, the general mechanical seal can not effectively protect, Damage to the spindle of the machine tool. In this regard, in order to improve the service life of the spindle bearing, Luo Guangjin strives to find a new sealing technology. After referring to some technical materials, a new technical structure—pneumatic sealing—is innovatively designed on the original sealing structure. The new structure prevents impurities and coolant from entering the spindle and effectively protects the spindle bearings. It is reported that in addition to obtaining utility model patents, the technology has also applied for invention patents. It lasted for three years and entered the substantive examination and publicity after passing the preliminary examination. The national patent examiners searched domestic and foreign related patent documents and published technical documents. Compare and review their novelty and creativity. After the adjustment of the appeal statement and the concept of the patent subject, it is finally authorized. The technical significance of this invention patent is that the air pressure sealing technology can be widely applied to grinding machines such as high speed, high efficiency and precision forming. As the inventor of Hangzhou Machine Tool Group, Hangzhou Machine Tool Group has patent exclusive rights, exclusive rights, licenses, etc., which effectively protect enterprises. New products and the creation of independent brands laid the foundation.
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