A few days ago, the ZTE incident came back to life after a storm. This crisis without smoke triggered the discussion of autonomous core technology among Chinese people. In fact, in the 3D printing industry, there are many domestic technologies that are restricted by foreign countries. Piezoelectric inkjet printing head is one of them. China's "storm" strong counter-attack piezoelectric inkjet printing head for sand-molded 3D printers, just as chip for semiconductor, its importance is self-evident. Previously, German Voxeljet, American Exone and other companies have already developed mature commercial applications in 3D printing technology of sand moulds in the world, but few Chinese companies limited by sprinklers can match them. Now, with the release of AMSKY Escale Storm S800 (hereinafter referred to as "Storm S800"), Escale's self-developed piezoelectric inkjet printing head has been put into commercial use. This means that Eskay has broken the long-established technical barriers of foreign enterprises, but also put a heavy deletion line on the list of core technologies restricted by foreign countries, so that Chinese 3D printing enterprises can proudly announce: "China has its own inkjet printing head!" In addition to feelings, storm S800 strength. It's even harder. As a small sand-moulded 3D printer, Storm S800 main body adopts a combination of linear motor and grating ruler. Under the construction speed of 25 seconds per layer, it can still maintain the accuracy of micron level. In addition, Storm S800 optimizes the core components through CFD and other calculation methods, and successfully creates a new type of non-consumable sand treatment system. In the actual sand treatment, no filter and other consumables are needed, which meets the requirements of energy saving and emission reduction and reduces the expenditure cost of consumables. As the printing head and its electronic drive of Storm S800 are independently developed by Eskay, Storm S800 can provide 256, 512 and other series of nozzles for users to choose, and has the ability to customize the stack number of nozzles and DPI resolution according to customer needs. As the first self-produced Sand-jet 3D printer in China, Storm S800 is developed independently by Eskay from the bottom hardware to the machinery, driver and host computer system. This means that Eskay not only breaks through the key technology of piezoelectric ink-jet printer, but also masters the core technology of Sand-jet 3D printing. Know the technical strength of China in the field of 3D printing of sand moulds. For Standard De Mei, the appearance of AMSKY Escale Storm S800, which surpasses that of the same foreign product AMSKY Escale Storm S800 3D sand-mould printer, has also attracted the attention of many people in the industry. For people in the industry, besides being proud that China has finally developed and manufactured its own piezoelectric ink-jet printer head, they are more concerned about this type of print head. Whether it can withstand the technical test, whether it is enough to confront the international inkjet printing head giants, whether it can really solve the problem of cost-effective printing head. For this reason, the author compares the similar products of Standard, Germany and America in terms of the technical level of the ESKAI 3D sand mould printing nozzle.