Method for improving utilization rate of spray hole by obliquely arranging spray head

Abstract

A method for improving the utilization rate of spray holes by obliquely arranging a spray head comprises the steps that the spray head is rotated by a certain angle to be obliquely installed on a printing trolley, a parting line is arranged on the spray head, the length direction of the parting line is consistent with the advancing direction of the printing trolley, and spray holes in all constant-color spray holes in a small coverage area on one side of the parting line are closed; the spray holes in the spot color spray holes in the small coverage area on the other side of the parting line are closed; according to the method, after the spray head is obliquely arranged, a dividing line located in the middle can divide two kinds of spray holes in an unequal division mode, a color printing area and a spot color printing area which are different in size are formed on the inner side and the outer side of the spray head in a staggered mode, and after the color printing area and the spot color printing area which are slightly closed at opposite angles are formed, the color printing area and the spot color printing area are formed. A large color printing area and a large spot color printing area are formed on the inner side and the outer side of the spray head, the utilization rate of spray holes in the spray head can be effectively increased, and the printing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of inkjet printers, and in particular to a method for increasing the utilization rate of nozzle holes by tilting a nozzle head. Background Art

[0002] The color nozzle of the inkjet printer is equipped with multiple regular color nozzles (conventional colors such as KCMY). Many tiny nozzles are evenly and densely arranged on each regular color nozzle. Different regular color nozzles are connected to ink tanks of different colors, so that these independent regular color nozzles can spray different colors of ink through the nozzles. Richer colors are synthesized by combining different color inks, and colorful images are printed on the printing medium. The special color nozzle of the inkjet printer is used to print other inks besides the conventional colors of KCMY, such as white ink, and is also used to spray varnish or glue. Printing white ink is used for covering or laying the bottom according to needs, and spraying varnish or glue is used to make the surface of the printed matter smoother and improve the color saturation and contrast of the printed matter.

[0003] At present, color nozzles and spot color nozzles are usually arranged alternately in the printing carriage, and the printing work is completed by combining different nozzles in sequence. However, the price of nozzles is expensive, and this combined nozzle arrangement method will increase the number of nozzles, resulting in high equipment costs. In order to reduce costs, the industry will omit the spot color nozzles and improve the color nozzles to make them have the functions of both color printing and spot color printing. The specific improvement method is: connect the normal color nozzle holes on one or both sides of the color nozzle with the spot color ink supply to make it a spot color nozzle hole, and set a dividing line in the middle of the nozzle (the dividing line is parallel to the side of the nozzle and its length direction is consistent with the travel direction of the printing carriage) to divide it into two equal parts, see Figure 1-2 , the spot color nozzles on one side of the dividing line are closed, and the normal color nozzles on the other side of the dividing line are closed, forming a front and rear partition printing structure. In this way, with the synchronous movement of the nozzle and the printing medium, the color printing and spot color printing can be done at the same time; although this improvement scheme can reduce the cost of the nozzle, half of the nozzles on the nozzle are in a closed and idle state, resulting in the nozzle being unable to work at full load, affecting printing efficiency, and needs further improvement. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a method for increasing the utilization rate of the spray holes by tilting the spray head.

[0005] The technical solution of the present invention is: a method for increasing the utilization rate of the spray hole by tilting the spray head, the method comprising the following steps: ① Rotate the nozzle to a certain angle and install it on the printing carriage. After the tilt, the arrangement direction of each row of nozzles forms an angle α with the running direction of the carriage; ② Set a dividing line on the nozzle, and the length of the dividing line is consistent with the direction of travel of the printing carriage; ③ Close the nozzles of the normal colors in the smaller coverage area on one side of the dividing line, and close the nozzles of the spot colors in the smaller coverage area on the other side of the dividing line.

[0006] Preferably, the nozzle is a nozzle with six rows of nozzle holes, two rows of nozzle holes on the side are connected to the special color ink supply system, and the remaining four rows of nozzle holes are connected to the normal color ink supply system.

[0007] Preferably, the dividing line is arranged along the diagonal line of the nozzle.

[0008] Preferably, the dividing line is arranged along a connecting line between an outer end of the spot color nozzle and an outer end of the normal color nozzle on the other side.

[0009] Preferably, the nozzle is a nozzle with eight rows of nozzle holes, the two rows of nozzle holes on one side are connected to the special color A ink supply system; the two rows of nozzle holes on the other side are connected to the special color B ink supply system; the four rows of nozzle holes in the middle are connected to the normal color ink supply system; the dividing lines are arranged in two parallel lines, dividing the rotated nozzle into three areas: front, middle and rear, the special color A nozzle holes and the special color B nozzle holes in the middle area are closed, and the normal color nozzle holes in the front and rear areas are closed.

[0010] Preferably, the width of the spray hole coverage area in the front, middle and rear regions along a direction perpendicular to the dividing line is the same.

[0011] Preferably, the 30°≤α≤60°.

[0012] Preferably, the angle α=45°.

[0013] Preferably, the normal color ink supply system supplies KCMY conventional colors, and the special color ink supply system supplies white ink, varnish or glue.

[0014] The beneficial technical effect of the present invention is: After the nozzle is tilted, the dividing line located in the middle can divide the two types of nozzles in an unequal manner, and color printing areas and spot color printing areas of different sizes are alternately formed on the inside and outside of the nozzle. After the smaller color printing area and spot color printing area are diagonally closed, larger color printing areas and spot color printing areas are formed on the inside and outside of the nozzle, which can effectively improve the utilization rate of the nozzles on the nozzle and improve its printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of an existing unimproved nozzle; Figure 2 It is one of the structural schematic diagrams of the existing improved sprinkler head; Figure 3 It is a structural schematic diagram of one of the improvement schemes of the nozzle of the present invention; Figure 4This is the second structural schematic diagram of the existing improved nozzle; Figure 5 It is a structural schematic diagram of the second improvement scheme of the nozzle of the present invention.

[0016] In the figure, 11. nozzle, 12. nozzle hole, 13. dividing line, 14. special color A nozzle hole, 15. special color B nozzle hole. DETAILED DESCRIPTION

[0017] Embodiment 1, see attached Figure 1-3 A method for increasing the utilization rate of the nozzles by tilting a nozzle with six rows of nozzles, the steps of the method are as follows: ① Rotate the nozzle 11 with six rows of nozzle holes 12 at a certain angle and install it on the printing carriage. After the tilt, the arrangement direction of each row of nozzle holes 12 forms an angle α with the running direction of the carriage, 30°≤α≤60°. Connect the two rows of nozzle holes 12 on the side of the nozzle 11 to the spot color ink supply system, and the remaining four rows of nozzle holes 12 to the normal color ink supply system; The normal color ink supply system supplies conventional colors such as KCMY, while the special color ink supply system supplies white ink, varnish or glue.

[0018] ② A dividing line 13 is set on the nozzle 11, and the length direction of the dividing line 13 is consistent with the travel direction of the printing carriage. The dividing line 13 is arranged along the diagonal line of the nozzle 11 or along the connecting line between the outer end of the spot color nozzle hole and the outer end of the normal color nozzle hole on the other side; ③ Close the normal color nozzles in the smaller coverage area on one side of the dividing line 13, and form a larger normal color nozzle coverage area on the other side (see attached Figure 3 The dotted line boxed area at the top) is used for color inkjet printing through the normal color nozzle coverage area; the spot color nozzles in the smaller coverage area on the other side of the dividing line 13 are closed, and a larger spot color nozzle coverage area is formed on the other side (see the attached figure). Figure 3 The dotted line framed area at the bottom) is covered with white ink or laid as a base through the spot color nozzle hole coverage area. This oblique installation structure of the nozzle head 11 can effectively improve the utilization rate of the nozzle holes on the nozzle head 11 and improve its printing efficiency.

[0019] Embodiment 2, see attached Figure 1 , 4 -5. A method for increasing the utilization rate of nozzles by tilting a nozzle with eight rows of nozzles, the steps of the method are as follows: ① Rotate the nozzle 11 with eight rows of nozzle holes 12 at a certain angle and install it on the printing carriage. After the tilt, the arrangement direction of each row of nozzle holes 12 forms an angle α with the running direction of the carriage, 30°≤α≤60°, and α is set to 45° for the best effect. Connect the two rows of nozzle holes 12 on one side of the nozzle hole to the ink supply system of the spot color A; connect the two rows of nozzle holes 12 on the other side to the ink supply system of the spot color B; and connect the four rows of nozzle holes 12 in the middle to the ink supply system of the normal color; The normal color ink supply system supplies conventional colors such as KCMY, while the special color ink supply system supplies white ink, varnish or glue.

[0020] ② Two dividing lines 13 are arranged side by side on the nozzle 11. The length direction of the two dividing lines is consistent with the moving direction of the printing carriage. The two dividing lines 13 divide the rotating nozzle 11 into three areas: front, middle and back. The width of the nozzle hole coverage area in the three areas perpendicular to the dividing lines 13 is the same; ③ The spot color A nozzle hole 14 and the spot color B nozzle hole 15 in the middle area are closed, forming a larger normal color nozzle hole coverage area in the middle area (see attached Figure 5 The dotted line in the middle of the image is used to select the area covered by the normal color nozzles. The normal color nozzles in the front and rear areas are closed, forming a larger spot color nozzle coverage area in the front and rear areas (see the attached figure). Figure 5 The dotted line framed area at the top and bottom), the front spot color A nozzle hole 14 coverage area is used for white ink covering or laying the base, and the rear spot color B nozzle hole 15 coverage area is used for spraying varnish or glue. This inclined installation structure of the nozzle head 11 can effectively improve the utilization rate of the nozzle holes on the nozzle head 11 and improve its printing efficiency.

Claims

1. A method for increasing the utilization rate of spray holes by tilting a spray head, which is characterized by comprising the following steps: ① Rotate the nozzle to a certain angle and install it on the printing carriage. After the tilt, the arrangement direction of each row of nozzles forms an angle α with the running direction of the carriage; ② Set a dividing line on the nozzle, and the length of the dividing line is consistent with the direction of travel of the printing carriage; ③ Close the nozzles of the normal colors in the smaller coverage area on one side of the dividing line, and close the nozzles of the spot colors in the smaller coverage area on the other side of the dividing line.

2. The method for increasing the utilization rate of the spray holes by tilting the spray head according to claim 1, characterized in that: The nozzle head has six rows of nozzle holes, two rows of nozzle holes on its side are connected to the special color ink supply system, and the remaining four rows of nozzle holes are connected to the normal color ink supply system.

3. The method for increasing the utilization rate of the spray holes by tilting the spray head according to claim 2, characterized in that: The dividing line is arranged along the diagonal line of the nozzle.

4. The method for increasing the utilization rate of the spray holes by tilting the spray head according to claim 2, characterized in that: The dividing line is arranged along a connecting line between the outer end of the spot color nozzle and the outer end of the normal color nozzle on the other side.

5. The method for increasing the utilization rate of the spray holes by tilting the spray head according to claim 1, characterized in that: The nozzle has eight rows of nozzle holes, two rows of nozzle holes on one side are connected to the ink supply system of special color A; two rows of nozzle holes on the other side are connected to the ink supply system of special color B; four rows of nozzle holes in the middle are connected to the ink supply system of normal color; two dividing lines are arranged side by side, and the rotated nozzle head is divided into three areas: front, middle and back, the special color A nozzle holes and the special color B nozzle holes in the middle area are closed, and the normal color nozzle holes in the front area and the back area are closed.

6. A method for increasing the utilization rate of spray holes by tilting a spray head according to claim 5, characterized in that: The width of the spray hole coverage area in the front, middle and rear regions along the direction perpendicular to the dividing line is the same.

7. A method for increasing the utilization rate of spray holes by tilting a spray head according to claims 1-6, characterized in that: The 30°≤α≤60°.

8. The method for increasing the utilization rate of the spray holes by tilting the spray head according to claim 1, characterized in that: The normal color ink supply system supplies KCMY conventional colors, and the special color ink supply system supplies white ink, varnish or glue.

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