JP3299997B2 - Dot printing method and printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a printing apparatus for printing a bar code, a color code and the like on a steel material to be printed effectively by using continuous dots.

[0002]

2. Description of the Related Art A printing apparatus in which ink is ejected from the tip of an ejection nozzle to form dots and perform printing is described in, for example, Japanese Patent Application Laid-Open No. 1-128834. The conventional printing device described in the above-mentioned patent publication provides a plurality of solenoid valve mechanisms on the upper surface of the manifold, forms an independent ink flow path for each solenoid valve mechanism inside the manifold, and has a lower surface of the manifold on the lower surface of the manifold. A discharge nozzle is provided for each independent flow path, and the discharge nozzles are individually controlled by an electromagnetic valve mechanism.

[0003]

In the conventional printing apparatus having the above-described structure, each solenoid valve mechanism is provided with only one discharge nozzle. Therefore, the structure of the ink flow path in the pattern plate of the manifold becomes complicated, and clear dots cannot be formed unless the moving speed of the printing device is controlled. Have difficulty. Therefore, although there are few solenoid valve mechanisms provided on the manifold, development of a printing apparatus capable of forming a large number of dots instantaneously is demanded.

[0004]

SUMMARY OF THE INVENTION The present invention has been developed on the basis of the above-mentioned drawbacks or requirements. Specifically, a plurality of solenoid valve mechanisms are provided on an upper surface of a manifold, and a lateral direction is provided in the manifold. the main passage is formed, the double of the ink
The main passage of the ink extends downward for every number of solenoid valve mechanisms.
An ink filling portion communicating with the ink filling portion;
Of the vertical ink flow path that communicates with the valve seat
An ink branch is provided at the tip, and a manifold is provided at the ink branch.
A plurality of parallel discharge nozzles extending to the lower surface of the hold
And the valve seat is momentarily opened by the solenoid valve mechanism.
The high-pressure ink in the ink filling section from the ink flow path.
Dots from the tips of multiple discharge nozzles through the branch
Made by ejecting Te printer, and a printing apparatus described above under
It moves relative to the printing material and has multiple solenoid valves.
By controlling the structure, ink is ejected from each ejection nozzle, and a bar code or a color code is printed by continuous dots, for example, on a surface of a steel material which is a material to be printed. It relates to a printing method.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a dot printing apparatus and a printing method according to the present invention will be described below in detail with reference to the drawings.

The printing apparatus 1 of the present invention comprises a plurality of solenoid valve mechanisms 2, a manifold 3 having the above-described solenoid valve mechanism 2 on the upper surface, and a plurality of ink discharge nozzles 4 provided on the lower surface of the manifold 3. It is a configuration consisting of

The above-described electromagnetic valve mechanism 2 is provided with an electromagnetic coil 2 inside a cylindrical housing 21 whose upper end is closed.
2 and a fixed iron core 23 and a movable iron core 24 are provided inside the electromagnetic coil 22 described above.
The control valve stem 26 integrally extending from the movable iron core 24 is inserted through a pedestal 25 attached to the open lower end of the control valve stem 2.
6 has a configuration in which the distal end portion is elastically projected out of the pedestal 25 by the bias of the spring 27.

The above-mentioned manifold 3 is constructed by integrally integrating a valve body 31, a seat 32, and a pattern plate 33. The upper surface of the valve body 31 has a housing whose upper surface is opened for each solenoid valve mechanism 2. A recess 34 is formed, and a main ink passage 35 is provided in the lateral direction inside the valve body 31. In addition, the main passage 35 is communicated below the ink filling portion 36 extending continuously below the valve body 31 from the storage recess portion 34, and the valve seat 3 is provided at the lower end of the ink filling portion 36.
7 is installed.

The sheet 32 and the pattern plate 33 of the manifold 3 are provided with an ink flow path 38 which communicates with the ink filling section 36 in a vertical direction, and extends in a lateral direction at a tip of the ink flow path 38. Ink branch 39
To form

A discharge nozzle 4 is attached to the lower surface of the pattern plate 33 of the manifold 3 via a nozzle block 41 so that the upper end of the discharge nozzle 4 communicates with the ink branch 39 described above. A plurality of ejection nozzles 4 are provided in parallel with one ink branching section 39 so as to communicate with each other. In the embodiment shown in the drawing, two ejection nozzles 4 are provided in one ink branching section 39 in parallel.
Therefore, the storage recess 3 formed in the valve body 31
The valve seat 37 communicates with the ink filling section 36 which continues from 4,
Further, a plurality of ejection nozzles 4 communicate with the ink flow path 38 and the ink branch portion 39 continuously from the valve seat 37.

In order to mount the solenoid valve mechanism 2 on the manifold 3, for example, a male screw portion is formed on the outer peripheral surface of the pedestal 25 and a female screw portion is formed on the inner peripheral surface of the storage recess 34. The solenoid valve mechanism 2 is held upright on the upper surface of the manifold 3 by screwing the male screw part and the female screw part and closing them tightly. In this manner, when the solenoid valve mechanism 2 is held by the manifold 3, the lower end of the control valve rod 26 elastically closes the valve seat 37. Therefore, even if the main passage 35 is filled with ink in a high pressure state to fill the ink filling section 36, the ink pressure does not act on the ink flow path 38, the ink branch section 39, and each of the ejection nozzles 4.

The printing apparatus 1 of the present invention has the above-described configuration. When printing a line using the printing apparatus 1, the main passage 35 of the manifold 3 and the ink filling sections 3 are used.
6 is filled with ink at a high pressure, and the valve seat 37, the ink flow path 38, the ink branching section 39, and each of the ejection nozzles 4 are filled with ink in a state where no pressure is applied. When a current is instantaneously applied to the electromagnetic coil 22 of the electromagnetic valve mechanism 2 in this state, a magnetic field is temporarily generated inside the electromagnetic coil 22, so that the movable iron core 24 instantaneously moves up and down, and the valve seat 37 is moved. Release for a moment. When the valve seat 37 is momentarily opened, high-pressure ink inside the ink filling section 36 flows from the ink flow path 38 into the ink branch section 39 and acts on each discharge nozzle 4 to form a dot from the tip of the discharge nozzle 4 as a dot. The ink is ejected.

Therefore, when the solenoid valve mechanism 2 operates,
Since the ink dots are ejected from the plurality of ejection nozzles 4, when the printing apparatus 1 is moved so as to be orthogonal to the parallel direction of the plurality of ejection nozzles 4, the same number of lines as the number of ejection nozzles 4 are simultaneously printed. can do. Also,
When the printing apparatus 1 is moved along the parallel direction of the plurality of ejection nozzles 4, the dots of the ink from each of the ejection nozzles 4 are overlapped, or the dots from each of the ejection nozzles 4 are controlled by controlling the moving state of the printing apparatus 1. Lines can be printed continuously. Furthermore, since the manifold 3 is provided with a plurality of solenoid valve mechanisms 2 and each of the solenoid valve mechanisms 2 is provided with a plurality of discharge nozzles 4 in parallel, the arrangement state of each discharge nozzle 4 and the manifold 3 If the moving state and the like are controlled electronically, it is possible to print a stable and complicated dot bar with extremely high performance. In this case, the printing apparatus 1 may be fixed, and the printing medium may be moved while electronically controlling the printing apparatus to perform printing using continuous dots.

The state of the dot of the ink ejected from each ejection nozzle 4 is determined by the time required for the control valve rod 26 to move up and down based on the energizing time applied to the electromagnetic coil 22 of the electromagnetic valve mechanism 2, the opening time of the valve seat 37, The pressure is determined by the strength of the pressure of the ink filling the passage 35 and the ink filling unit 36. Therefore, according to the state of the line to be printed, the electromagnetic coil 2
2, the energizing time, the ink pressure in the main passage 35, and the like may be set.

Although the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the above-described embodiments, but may be implemented in any manner unless the structure described in the claims is changed. can do.

[0016]

In summary, according to the present invention, an electromagnetic valve mechanism is provided in a manifold, an ink flow path is formed in the manifold, and an ink branch section is provided at the tip of the ink flow path. Ink is ejected from each ejection nozzle by moving a dot printing device or moving a printing target material while controlling a dot printing device formed by connecting a plurality of parallel ejection nozzles extending on the lower surface of the manifold at the branch portion. The bar code or the color code is printed on the surface of a steel material as a material to be printed, for example, by the continuous dots formed as described above. Therefore, 1
Since a plurality of continuous dots are formed at the same time for one electromagnetic valve mechanism, the adjustment of the dots is facilitated, stable dots can be formed, and the continuous dots can be formed accurately. In addition, not only can dots be overprinted and continuous, but also multiple lines can be easily printed at the same time, making high-speed printing work possible and depending on the moving speed of the printing object. It can be created even in a state line, and is of high practical value, for example, for printing a bar code, carla code, or the like of a steel material that displays a material or composition of a metal, a management number, a lot number, and the like.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view showing an embodiment of a printing apparatus of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 printing device 2 electromagnetic valve mechanism 3 manifold 4 discharge nozzle 21 housing 22 electromagnetic coil 24 movable iron core 25 pedestal 26 control valve stem 31 valve body 32 sheet 33 pattern plate 34 storage recess 35 main passage 36 ink filling portion 37 valve seat 38 Ink flow path 39 Ink branch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-19767 (JP, A) JP-A-57-107849 (JP, A) JP-A-56-93567 (JP, A) 144161 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B41J 2/015 B41J 2/175

Claims (3)

(57) [Claims] 1. A plurality of solenoid valve mechanisms are provided on an upper surface of a manifold, and a main passage for ink in a lateral direction is formed in the manifold, and each of the plurality of solenoid valve mechanisms extends downward.
Ink filling section communicating with the main ink passage.
To the valve seat installed at the lower end of the ink filling section.
An ink branch is provided at the tip of the vertical ink flow path,
The ink branching portion has a plurality of extending to the lower surface of the manifold.
The two parallel discharge nozzles are connected, and the
Release the high pressure ink in the ink filling section instantaneously.
From the ink flow path through the ink branch
Printer that discharges dots from the tip of the
Moves relatively to the material to be printed.
A dot printing method, characterized in that ink is ejected from each ejection nozzle and printing is performed with continuous dots by controlling a mechanism . 2. A plurality of solenoid valve mechanisms are provided on an upper surface of a manifold, and a main passage for ink in a lateral direction is formed in the manifold, and each of the plurality of solenoid valve mechanisms extends downward.
Ink filling section communicating with the main ink passage.
To the valve seat installed at the lower end of the ink filling section.
An ink branch is provided at the tip of the vertical ink flow path,
The ink branching portion has a plurality of extending to the lower surface of the manifold.
The two parallel discharge nozzles are connected, and the
Release the high pressure ink in the ink filling section instantaneously.
From the ink flow path through the ink branch
Transfer a printing device that discharges dots from the tip of the
And control of multiple solenoid valve mechanisms
A dot printing method characterized in that ink is ejected from an ejection nozzle and printing is performed with continuous dots. 3. A plurality of solenoid valve mechanisms are provided on an upper surface of the manifold, and a main passage for ink in a lateral direction is formed in the manifold, and each of the plurality of solenoid valve mechanisms extends downward.
Ink filling section communicating with the main ink passage.
To the valve seat installed at the lower end of the ink filling section.
An ink branch is provided at the tip of the vertical ink flow path,
The ink branching portion has a plurality of extending to the lower surface of the manifold.
The two parallel discharge nozzles are connected, and the
Release the high pressure ink in the ink filling section instantaneously.
The via ink branching portion from the ink flow path a plurality of discharge nozzles
A printing device that discharges dots from the tip of the printer .