Double heating device for jet printing machine adopting micro-piezoelectricity printing head

Abstract

The invention discloses a double heating device for a jet printing machine adopting a micro-piezoelectricity printing head. The double heating device comprises an ink jet bracket (1) capable of moving on the jet printing machine; the ink jet bracket (1) comprises an upper bracket body (11) and a lower bracket body (12) connected with the upper bracket body (11); the upper bracket body (11) is provided with a plurality of ink boxes (2), and the lower bracket body (12) is provided with a plurality of jet heads (3); an ink pipe is arranged between each jet head (3) and the corresponding ink box (2); the ink boxes (2) are connected with first heating elements (4) for heating ink in the ink boxes (2); and the lower bracket body (12) is provided with second heating elements (5) for heating the ink jet ends (3a) of the jet heads (3). The double heating device is simple in structure and good in heating effect.

Description

【Technical field】 [0001] The invention relates to a jet printer, more specifically to a secondary heating device of the jet printer using a micro piezoelectric print head. 【Background technique】 [0002] Jet printers with print heads using micro piezoelectric technology are now widely used in various digital printing industries. Among them, because the viscosity of the ink that many industrial printing applications need to use exceeds the viscosity range that the micro piezoelectric print head can withstand normal printing at room temperature 25 degrees Celsius, such as ultraviolet curing (UV) inks with multifunctional monomers as the main component, or It is used for three-dimensional additive printing (3D printing) of paraffin ink, etc. Therefore, such applications can only reduce the viscosity of the ink by increasing the working temperature to reach the adaptable range of the print head, so the precision without built-in heating element is high and the price is low High...

AI Technical Summary

Problems solved by technology

Among them, because the viscosity of the ink that many industrial printing applications need to use exceeds the viscosity range that the micro piezoelectric print head can withstand normal printing at room temperature 25 degrees Celsius, such as ultraviolet curing (UV) inks with multifunctional monomers as the main component, or It is used for three-dimensional additive printing (3D printing) of paraffin ink, etc. Therefore, such applications can only reduce the viscosity of the ink by increasing the working temperature to reach the adaptable range of the print head, so the precision without built-in heating element is high and the price is low High-viscosity ink applications can only be printed with expensive industrial piezoelectric print heads with built-in heaters, which increases equipment costs

[0003] At present, some manufacturers try to install the heating device outside the print head, but because the micro piezoelectric print head has many plastic parts and poor heat conduction, simple external heating will cause the overall internal space of the print head to rise. When the internal circuit temperature rises too high, The internal drive circuit of the print head becomes unstable, which affects the printing effect and the life of the print head. Moreover, the position of the print head needs to be adjusted and fixed during installation and debugging. The fixed heating body will also limit the position of the print head.

If the ink is simply preheated, due to the limitation of the design of the ink carriage and the ink path of ordinary printers, the intermediate pipeline is too long before the ink flows to the nozzle, and the ink will become overheated and precipitate, block the pipeline and the print head, or reach the nozzle temperature has been lost

In addition, most of the micro-piezoelectric print heads use plastic ink sacs as pressure buffers, and the ink path of filtration makes it more difficult to preheat the ink. If the heating structure is set unreasonably, it will cause a large temperature change in the print head when printing different pictures. change, the printing effect is even worse

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