Impact needle of spray head of large character code spraying machine

A technology of inkjet printers and large characters, which is applied in printing and other directions, can solve the problems of uneven ink distribution, poor visual effect, and low work efficiency, and achieve the effects of reducing equipment maintenance costs, prolonging service life, and small friction coefficient

Inactive Publication Date: 2012-10-03
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AI-Extracted Technical Summary

Problems solved by technology

Moreover, stamping, pad printing or roller printing requires a typeface for each letter or number. The intuitive effect is poor, the ink dis...
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The invention provides an impact needle of a spray head of a large character code spraying machine. The head of the impact needle is positioned in a cavity between an upper ink fountain and a lower ink fountain; the tail of the impact needle stretches into an inductance coil and is connected with a movable core; the inductance coil drives the impact needle to move; a group of spray holes are formed in the upper ink fountain; ink can be accommodated in the cavity; and the impact needle moves to ensure that the ink is sprayed from the spray holes. The impact needle comprises a needle rod, wherein an impact block is arranged on the head of the needle rod and manufactured by forming a polytetrafluoroethylene material; a spring is arranged on the needle rod; the fixed end of the spring is connected to the needle rod; and the movable end of the spring is connected with the impact block. The impact block at the tail end of the impact needle is manufactured by forming polytetrafluoroethylene with an extremely low friction coefficient, and high mechanical property can be kept in a wide temperature range, so that the code spraying machine normally works in various environments, the maintenance cost of equipment can be reduced, and the service life is prolonged.

Application Domain


Technology Topic

Low frictionInductance +3


  • Impact needle of spray head of large character code spraying machine
  • Impact needle of spray head of large character code spraying machine


  • Experimental program(1)

Example Embodiment

[0012] In order to make it easy to understand the technical means, creative features, goals and effects achieved by the present invention, the present invention will be further explained below in conjunction with the drawings and specific embodiments.
[0013] The nozzle striker structure of the large character inkjet printer proposed in the present invention is as follows figure 1 , figure 2 As shown, the head of the striker 32 is located in the cavity between the upper ink tank 1 and the lower ink tank 2, and the tail of the striker 32 extends into the inductor coil 31 and is connected to the moving iron core. The inductor coil 31 drives the striker 32 to move. The upper ink tank 1 has a set of nozzle holes 11, and the cavity can contain ink 6. The movement of the striker 32 causes the ink 6 to be ejected from the nozzle holes 11. The striker 32 includes a needle bar 321 and the head of the needle bar 321 With a hit block 322. The bump 322 is formed of polytetrafluoroethylene material. The needle bar 321 is provided with a spring 323, the fixed end of the spring 323 is connected to the needle bar 321, and the movable end of the spring 323 is connected to the striker 322.
[0014] Such as figure 1 , figure 2 As shown, the nozzle of the present invention includes an upper ink tank 1 and a lower ink tank 2. There is a cavity between the upper ink tank 1 and the lower ink tank 2. The cavity is provided with a striker valve, and the upper ink tank 1 has A set of nozzle holes 11, the striker valve has an inductance coil 31, a movable iron core and striker 32, the coil 31 is arranged outside the lower ink tank 2, and the striker 32 is located in the cavity. The inductor coil 31 is wound on the stainless steel tube 311, and the stainless steel tube 311 is fixed to the outside of the lower ink tank 2. The head of the needle bar 321 is provided with a spring 323, and the end of the spring 323 is connected with a striker 322. The moving iron core is a soft magnetic core doped with magnesium. The striker valve is connected to the drive circuit board 4, and the drive circuit board 4 controls the action of the striker valve.
[0015] Polytetrafluoroethene (Polytetrafluoroethene) is a synthetic polymer material that replaces all hydrogen atoms in polyethylene with fluorine. This material is resistant to acids, alkalis, and various organic solvents, and is almost insoluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance, and its friction coefficient is very low, so it can be used for lubrication, and it has also become an ideal coating for easy-to-clean woks and water pipes. The firing pin made of this material has the following advantages:
[0016] 1. Non-sticky, almost all substances do not adhere to the PTFE coating film, and the thin film also shows good non-stick performance;
[0017] 2. Heat resistance, PTFE coating film has excellent heat resistance and low temperature resistance. It can withstand high temperature to 300℃ in a short time. Generally, it can be used continuously between 240℃~260℃ and has remarkable thermal stability. , It can work at freezing temperature without embrittlement, and does not melt at high temperature;
[0018] 3. Sliding property, the PTFE coating film has a low friction coefficient, the friction coefficient changes when the load is sliding, but the value is only between 0.05-0.15;
[0019] 4. Moisture resistance, the surface of the PTFE coating film does not stick to water and oil, and it is not easy to stick to the solution during production operations. If there is a small amount of dirt, it can be removed by simple wiping. Short downtime, saving working hours and improving work efficiency ;
[0020] 5. Wear resistance: Under high load, it has excellent wear resistance, and under a certain load, it has the dual advantages of wear resistance and non-sticking;
[0021] 6. Corrosion resistance: PTFE is hardly corroded and can protect parts from any kind of chemical corrosion.
[0022] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and the description only illustrate the principles of the present invention. The present invention will have various aspects without departing from the spirit and scope of the present invention. Various changes and improvements, these changes and improvements fall within the scope of the claimed invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.


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