CN111674157A - The Nozzle Adjustment System of Digital Inkjet Printer - Google Patents

Abstract

The invention discloses a spray head adjusting system of a digital ink-jet printer, which comprises a plurality of spray head plates which are parallel to each other, wherein a plurality of spray heads are arranged on each spray head plate, part of the spray heads are fixed on the spray head plates, spray head adjusting mechanisms are arranged on the spray head plates near the rest of the spray heads, a horizontal adjusting mechanism for adjusting the horizontal position of the spray head plates and a height adjusting mechanism arranged between the spray head plates and a color bar frame are arranged between the spray head plates and the equipment frame. The invention can be adjusted in multiple directions, and ensures the printing quality of the spray head.

Description

The Nozzle Adjustment System of Digital Inkjet Printer

technical field

The invention relates to a nozzle adjustment system of a digital inkjet printer.

Background technique

The nozzle plate assembly of an inkjet printer is loaded with a plurality of arranged nozzles. The nozzle is the core component to complete the inkjet printing. The relative positions of the nozzles on the nozzle board must be parallel and aligned to ensure that all nozzles on each nozzle are Arranged in an orderly and accurate position to ensure the quality of the print. When printing, each nozzle of each nozzle ejects tiny ink droplets onto the surface of the tile to form a pattern. Once the nozzle's position is skewed and the position is inaccurate, it will affect the printing effect. How to adjust the nozzle to ensure the printing quality is a problem that needs to be solved urgently at present.

SUMMARY OF THE INVENTION

In order to overcome the above shortcomings, the purpose of the present invention is to provide a nozzle adjustment system of a digital inkjet printer that can adjust in multiple directions and ensure the printing quality of the nozzle.

In order to achieve the above purpose, the technical solution adopted in the present invention is: a nozzle adjustment system of a digital inkjet printer, comprising a plurality of mutually parallel nozzle plates, each of which is provided with a plurality of nozzles, and some of the nozzles It is fixed on the nozzle plate, and the nozzle plate near each of the nozzles is provided with a nozzle adjustment mechanism. Height adjustment mechanism with color bar frame.

The beneficial effects of the nozzle adjustment system of the digital inkjet printer of the present invention are that the nozzle adjustment mechanism is used to adjust the position of each nozzle on the nozzle plate on the nozzle plate, and to fine-tune the nozzles; The position of the nozzle plate of the nozzle in the horizontal direction, and then ensure the horizontal position of the multiple nozzles on each nozzle plate, which is used for rough adjustment of the nozzle in the horizontal position; the height adjustment mechanism is used to adjust the installation of multiple nozzles. The position of the nozzle plate in the vertical direction, and then ensure the height position of the plurality of nozzles on each nozzle plate, so as to make a rough adjustment of the height position of the nozzles. Through the settings of the nozzle adjustment mechanism, the level adjustment mechanism, and the height adjustment mechanism, the nozzle can be accurately adjusted in multiple directions, and the printing quality of the nozzle is finally guaranteed.

Preferably, each of the nozzle adjustment mechanisms includes a nozzle adjustment device and a spring plate; three nozzle adjustment devices are provided, which are respectively located at three corners of the nozzle, and each of the corners is provided with a right-angled groove, which can drive all the nozzles. The spray head is moved forward and backward, left and right on the spray head plate; the spring sheet is located at the remaining corner of the spray head and a corner adjacent to the corner, and the spring sheet at the remaining corner is provided with two and staggered. , the free end of the spring sheet is in close contact with the adjacent two sides of the corner, forcing the nozzle to abut against the three nozzle adjustment devices. The three eccentric adjustment devices located at the three corners of the nozzles are used to adjust the left, right, front and rear positions of each nozzle in the horizontal direction, and the three spring sheets force the nozzles to always abut against the three nozzle adjustment devices.

Preferably, the nozzle adjusting device includes a pre-compression bolt, an adjustment bolt, a first pressing bolt, a first pressing block and an adjustment mounting bracket; the pre-pressing bolt passes through the nozzle and penetrates into the nozzle plate and is connected with the nozzle plate. The pre-compression nut is threadedly connected, and the pre-compression nut can rotate in the nozzle plate and move along the thickness direction of the nozzle plate. The pre-compression bolt located in the nozzle plate is sleeved with a pre-compression spring and is pressed by the pre-compression nut. , the elastic force of the pre-compression spring forces the pre-compression bolt to compress the nozzle on the nozzle plate, and there is a gap between the pre-press bolt and the nozzle; the adjustment bolt passes through the nozzle plate, and the axis of the adjustment bolt is connected to the nozzle plate. The nozzle plate is closely matched and can rotate relative to each other. The adjustment bolt passing through the nozzle plate is sleeved with an adjustment compression spring, and the adjustment compression spring is limited by the spring sleeve threadedly connected at the tail of the adjustment bolt. The spring presses the head of the adjusting bolt on the nozzle plate, the head of the adjusting bolt is of an eccentric structure and is provided with an inner hexagonal hole, and the head of the adjusting bolt is in contact with the side surface of the right-angle groove of the nozzle; the The adjustment mounting bracket is fixed on the nozzle plate, the first pressing bolt thread passes through the nozzle plate and is threadedly connected with the first pressing block, one end of the first pressing block is clamped on the adjustment mounting bracket, and the other end Tighten the spring cover. Optimize and adjust the nozzle installation and adjustment structure, improve the adjustment accuracy, and finally make the nozzle holes of each nozzle in an orderly arrangement and accurate position, thereby ensuring the quality of printing. The printing width of the printing device is improved, and the printing quality is stable.

Preferably, part of the adjusting bolts of the spray head adjusting device are non-eccentric structures, and the heads of the adjusting bolts are coincident with the central axis of the shaft portion. When adjusting, there are multiple nozzles installed on one nozzle plate. When adjusting nozzles, first determine a center nozzle, adjust the center nozzle first, and then fix it. The other nozzles are adjusted accordingly according to the position of the center nozzle. Then determine a center nozzle, and the remaining nozzles are adjusted according to the second center nozzle, which can be adjusted to a large number of nozzles on the longer nozzle plate. It can solve the problem that the existing nozzle plate cannot meet the requirements due to the increasing number of installed nozzles and the long nozzle plate.

Preferably, the pre-compression nut is provided with a slot or a cross slot matched with a screwdriver. When adjusting, use a screwdriver to make the preload nut still, rotate the preload bolt, and then reach the set torque under the action of the preload spring.

Preferably, the horizontal adjustment mechanism includes a deflection alignment adjustment device and a limit rotation device, the rear end of the nozzle plate rotates and can move relative to the equipment frame through the limit rotation device, and the front end of the nozzle plate is adjusted by deflection alignment The device is connected with the equipment frame, and can control the front end of the nozzle plate to move in the front and rear, left and right directions. Using the method of rotating one end and adjusting the other end, and then adjusting the front, rear, left and right positions of the entire nozzle plate in the horizontal direction, the structure is simple, the adjustment is labor-saving, the time-consuming is short, and the adjustment efficiency is improved.

Preferably, the limit rotation device includes a rotation positioning pin and a rear guide limit block, the rear guide limit block is fixed on the equipment frame, the rear guide limit block is U-shaped, and the rotation positioning pin It is clamped in the rear guide limit block, and the two can rotate and move relative to each other, and the rotation positioning pin is connected with the rear end of the nozzle plate; the deflection alignment adjustment device includes an adjustment block, a fixed block, a limit bolt, To adjust the top wire, the adjustment block is fixedly installed below the front end of the nozzle plate, the adjustment block is in a frame-like structure, the fixed block is fixed on the equipment frame and located in the adjustment block, between the fixed block and the adjustment block There is a gap, the limit bolts are provided with two and are threadedly connected with the adjacent two sides of the adjustment block, and the adjustment jack screws are provided with two and are threaded with the remaining adjacent two sides of the adjustment block. The top screw and the two limit bolts are pressed against the fixing block respectively. The rear end of the printhead plate rotates around the central axis of the rotating positioning pin, and the rotating positioning pin can move forward and backward on the U-shaped rear guide limit block; the front end of the printhead plate is adjusted by two adjustment jacks and two limit bolts The block is in the front and rear, left and right positions of the fixed block, and then the front and rear, left and right positions of the nozzle plate are adjusted. When the front end is adjusted, the rear end of the nozzle plate moves back and forth and rotates in the rear guide limit block. Then, it is ensured that the nozzle plates of the plurality of color bars are parallel to each other, and the front and rear alignment positions of the nozzle plates are ensured, and the printing accuracy is improved.

Preferably, the height adjustment mechanism includes a height adjustment device installed between the nozzle plate and the color bar frame and located at both ends, and a height auxiliary adjustment device located in the middle, and the height auxiliary adjustment device is arranged at intervals between the nozzle plate and the color bar. the middle of the frame. The entire nozzle plate can maintain a good flatness to ensure that the height of each nozzle on the nozzle plate is consistent, especially to eliminate the phenomenon of concave in the middle.

Preferably, the height adjustment device includes a first adjustment bolt, a first nut and a spring, the first adjustment bolt penetrates the nozzle plate from bottom to top and is threadedly connected with the bottom plate of the color bar frame, and the first adjustment bolt passes through the nozzle plate. The first nut at the free end fastens the nozzle plate and the color bar frame, the spring is arranged between the nozzle plate and the bottom plate and is sleeved on the first adjustment bolt; the height auxiliary adjustment device includes a gasket, a second nut and a first adjustment bolt. Two adjustment bolts, the second adjustment bolt passes through the square tube beam of the color bar frame and is threadedly locked and fixed with the nozzle plate, the washer and the second nut are provided with two and are sleeved on the second adjustment bolt , the two gaskets are locked on the upper and lower end faces of the square tube beam through the second nut.

Preferably, in order to solve the problem that the temperature balance of each nozzle cannot be guaranteed in the prior art, heating belts are arranged on both sides of the nozzle plate in the present invention, and the heating belts are arranged inside the reinforcing ribs on both sides of the nozzle plate, so A temperature sensor is arranged on the nozzle plate, and the temperature sensor is connected with the controller. It is used to heat the nozzle plate, and finally the heat is conducted through the nozzle plate to increase the temperature of the nozzle installed on the nozzle plate. The temperature sensor is responsible for detecting the temperature of the nozzle, and through the corresponding controller, the temperature is kept constant. The beneficial effect of the scheme and the technical problem solved: ensure the temperature balance of each nozzle.

Preferably, in order to solve the problem that the sealing effect of the existing nozzle plate assembly is not good, and air pollutants such as dust are easily deposited on the printing nozzle, which ultimately affects the printing effect, a nozzle protective plate is provided under the nozzle of the present invention. A Mylar film is arranged between the spray head and the spray head protection plate, and square holes corresponding to the spray head are arranged on the Mylar film. The sealing between the nozzles at the bottom of the nozzle plate and the nozzle plate ensures that the interior of the printing core part is clean.

Description of drawings

Fig. 1 is the exploded view that the nozzle adjustment mechanism in this embodiment cooperates with the nozzle plate;

2 is a perspective view of the nozzle adjustment mechanism in this embodiment;

Fig. 3 is the bottom view of the nozzle adjustment mechanism and the nozzle plate in this embodiment;

Fig. 4 is the sectional view at A-A place in Fig. 3;

5 is a cross-sectional view of the nozzle adjustment mechanism in this embodiment;

FIG. 6 is a perspective view of the level adjustment mechanism and the nozzle plate in this embodiment;

Fig. 7 is a partial enlarged view at B in Fig. 6;

8 is an exploded view of the deflection alignment adjustment device in this embodiment;

9 is a cross-sectional view of the deflection alignment adjustment device in this embodiment;

10 is a perspective view of the limit rotation device in this embodiment;

11 is a perspective view of the height adjustment mechanism and the color bar frame in this embodiment;

Figure 12 is an exploded view of the height adjustment mechanism and the color bar frame in this embodiment;

13 is a cross-sectional view of the height adjustment device in this embodiment;

FIG. 14 is a cross-sectional view of the height auxiliary adjusting device in this embodiment.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be more clearly defined.

Referring to Figures 1-14, a nozzle adjustment system for a digital inkjet printer of the present embodiment includes a plurality of mutually parallel nozzle plates 100, each nozzle plate 100 is provided with a plurality of nozzles 200, and some of the nozzles 200 It is fixed on the nozzle plate 100, and the nozzle plate 100 near each nozzle 200 is provided with a nozzle adjustment mechanism 800 for fine adjustment of each nozzle 200, and a nozzle plate 100 is arranged between the nozzle plate 100 and the equipment frame to adjust the level of the nozzle plate 100. The horizontal adjustment mechanism 300 of the position can roughly adjust the horizontal position of the nozzle 200 , and the height adjustment mechanism 400 provided between the nozzle plate 100 and the color bar frame 500 can roughly adjust the height of the nozzle 200 .

As shown in FIGS. 1-5 , each nozzle adjustment mechanism 800 in this embodiment includes a nozzle adjustment device 810 and a spring plate 820 ; there are three nozzle adjustment devices 810 , which are respectively located at three corners of the nozzle 200 . A right-angled groove 210 is provided, which can drive the nozzle 200 to move back and forth, left and right on the nozzle plate 100; the spring sheet 820 is located at the remaining corner of the nozzle 200 and a corner adjacent to the corner, and is located at the remaining corner. There are two spring pieces 820 of the 2000 and are arranged in a staggered manner. The free ends of the spring pieces 820 are in close contact with the adjacent two sides of the corner, forcing the spray head 200 to abut against the three spray head adjustment devices 810 .

The nozzle adjusting device 810 includes a preload bolt 811, an adjustment bolt 812, a first pressing bolt 813, a first pressing block 814, and an adjustment mounting bracket 815; The pre-compression nut 816 in the plate 100 is threadedly connected. The pre-compression nut 816 can rotate in the nozzle plate 100 and move along the thickness direction of the nozzle plate 100. The pre-compression bolt 811 in the nozzle plate 100 is sleeved with a pre-compression spring. 817 and is pressed by the pre-compression nut 816, the elastic force of the pre-compression spring 817 forces the pre-compression bolt 811 to press the nozzle 200 on the nozzle plate 100, there is a gap between the pre-compression bolt 811 and the nozzle 200; the adjustment bolt 812 passes through In the nozzle plate 100, the shaft of the adjusting bolt 812 is closely matched with the nozzle plate 100 and can rotate relatively. The adjusting bolt 812 passing through the nozzle plate 100 is sleeved with an adjustment compression spring 818, and the adjustment compression spring 818 is adjusted by the adjustment bolt 812. The spring sleeve 819 threaded at the tail is limited, and the adjusting compression spring 818 presses the head of the adjusting bolt 812 on the nozzle plate 100. The head of the adjusting bolt 812 is eccentric and is provided with a hexagonal hole. The head is in contact with the side surface of the right-angled groove 210 of the nozzle 200; the adjustment mounting bracket 815 is fixed on the nozzle plate 100, the first pressing bolt 813 thread passes through the nozzle plate 100 and is threadedly connected with the first pressing block 814, and the first pressing bolt 813 is threaded and fixed. One end of a pressing block 814 is clamped on the adjustment mounting bracket 815 , and the other end is pressed against the spring sleeve 819 . The pre-compression nut 816 is provided with a slot or a cross slot matched with a screwdriver.

The head eccentric inner hexagon adjustment bolt 812 is used as the adjustment screw, and by adjusting the angle of the adjustment bolt 812 , the front, rear, left, right, and deflection angles of the nozzle 200 can be precisely controlled. Two of the adjusting bolts 812 abut against the side of the right-angled groove 210 along the longitudinal direction of the showerhead 200 , and the remaining one of the adjusting bolts 812 abuts against the side of the right-angled groove 210 along the short direction of the showerhead 200 .

Part of the adjusting bolts 812 of the nozzle adjusting device 810 are non-eccentric structures, and the heads of the adjusting bolts 812 coincide with the central axis of the shaft portion. The nozzle fixed by the non-eccentric structure adjusting bolt 812 is the center nozzle. Taking No. 21 nozzles as an example, No. 9 nozzles are selected as the first center nozzle S9, No. 17 nozzles are selected as the second center nozzle S17, No. 1-8 nozzles (8) are on the left side of the first center nozzle, No. 10-17 nozzles (8) to the right of the first center nozzle. When adjusting, first fix the position of the first center nozzle, and use it as the positioning reference to adjust the positions of No. 1-8 nozzles and No. 10-17 nozzles. After the adjustment is completed, adjust the position of No. 18-21 nozzles based on the second center nozzle.

When the nozzle adjusting device 810 with eccentric structure is used to adjust the nozzle 200, the nozzle 200 is pressed on the nozzle plate 100 by the preload bolt 811, the preload nut 816 and the preload spring 817. Since there is a gap between the preload bolt 811 and the nozzle mounting hole of the nozzle head 200 , the position of the nozzle head 200 on the nozzle head 100 can be slightly adjusted. Since there is a slot on the pre-compression nut 816, the pre-compression nut 816 can be fixed by a screwdriver, and the pre-compression bolt 811 can be rotated to adjust the compressed elastic force of the pre-compression spring 817.

The eccentric adjusting bolt 812 and the spring sleeve 819 are tightened with each other (the head of the spring sleeve 819 is hexagonal), and is pressed on the nozzle plate 100 by adjusting the compression spring 818, and the shaft part of the eccentric adjusting bolt 812 is precisely matched with the nozzle plate 100, Can be rotated. The head of the eccentric adjustment bolt 812 is in contact with the spray head 200 . When adjusting, use a wrench to rotate the eccentric adjusting bolt 812, because the shaft portion of the eccentric adjusting bolt 812 is eccentric to the head by 0.1 mm, by rotating the adjusting bolts 812 at the three corners, the position of the nozzle 200 in the left and right, front and rear changes. , and the spring sheet 820 at the remaining corner presses the nozzle 200 .

After the adjustment is completed, the first compression bolt 813 needs to be tightened (before the adjustment, the first compression bolt 813 is in a loose state to ensure that the eccentric adjustment bolt 812 can be rotated), so that the first compression block 814 will compress the spring sleeve 819 , the position of the eccentric adjusting bolt 812 is fixed, so that the position of the spray head 200 is fixed. The first pressing block 814 is clamped in the adjustment mounting bracket 815 to ensure that the position of the first pressing block 814 does not deflect. Then, by rotating and adjusting the three eccentric adjusting bolts 812, the front and rear, left and right and deflection of the spray head 200 can be adjusted. Finally, the nozzle holes of each nozzle 200 are arranged in an orderly manner, and the positions are accurately aligned.

As shown in FIGS. 6-10 , the horizontal adjustment mechanism 300 includes a deflection alignment adjustment device 310 and a limit rotation device 320 . The rear end of the nozzle plate 100 rotates and can move relative to the equipment frame through the limit rotation device 320 . The front end is connected with the equipment frame through the deflection alignment adjusting device 310 , and can control the front end of the nozzle plate 100 to move in the front-rear and left-right directions.

The limit rotation device 320 includes a rotation positioning pin 321, a rear guide limit block 322, the rear guide limit block 322 is fixed on the equipment frame, the rear guide limit block 322 is U-shaped, and the rotation positioning pin 321 is clamped on the rear guide In the limiting block 322, the two can rotate and move relative to each other, and the rotating positioning pin 321 is connected with the rear end of the nozzle plate 100; Wire 314, the adjusting block 311 is fixedly installed below the front end of the nozzle plate 100, the adjusting block 311 is in a frame-like structure, the fixing block 312 is fixed on the equipment frame and is located in the adjusting block 311, and there is a space between the fixing block 312 and the adjusting block 311. Clearance, the limit bolts 313 are provided with two and are threadedly connected with the adjacent two sides of the adjustment block 311, the adjustment jacks 314 are provided with two and are threadedly connected with the remaining adjacent two sides of the adjustment block 311, and the two adjustment jacks 314 and The two limiting bolts 313 abut against the fixing block 312 respectively.

Wherein, a second spring 315 is arranged between the limiting bolt 313 and the fixing block 312, and the limiting bolt always presses against the fixing block, which is convenient for adjusting the adjustment of the jacking wire. A jack screw nut 316 is fixed on the adjacent two sides of the adjusting block 311 , and the two adjusting jack screws 314 are threadedly matched with the two jack screw nuts 316 respectively. The jack screw nuts 316 are stepped and bear reasonable force.

A second pressing block 317 is arranged above the nozzle plate 100, and a second pressing bolt 3111 is arranged on the second pressing block 317. The second pressing bolt 3111 passes through the nozzle plate 100 and is threadedly connected to the top of the fixing block 312. There is a gap between the two pressing bolts 3111 and the nozzle plate 100 . After the adjustment of the nozzle plate 100 is completed, the nozzle mounting plate is fixed with the second pressing bolts 3111 and the second pressing blocks 317 .

The side section of the fixing block 312 is T-shaped, the adjusting block 311 has a through hole 318 for the fixing block 312 to pass through, and the side section of the through hole 318 is T-shaped. The T-shaped structure plays a role of limiting and guiding, and the sliding of the adjustment block on the fixed block is restricted, and it can only slide in the horizontal direction.

A front guide limit block 319 is disposed below the adjustment block 311 , the front guide limit block 319 is fixed on the equipment frame, and the fixing block 312 passing through the adjustment block 311 is fixed on the front guide limit block 319 by bolts.

The opening of the rear guide limiting block 322 is trumpet-shaped, the rotation positioning pin 321 adopts a structure whose middle diameter is larger than the diameters of both ends, and the rotation positioning pin 321 is arc-shaped from top to bottom. So that when the nozzle plate is pushed into the frame of the equipment, it will not be stuck.

The head of the adjusting jack wire 314 is provided with a concave mark 3110 . It can be used as a reference point during adjustment, and it is convenient for the operator to record the number of laps adjusted.

When the horizontal position of the nozzle plate 200 is to be adjusted, the two adjusting jacks 314 are rotated. Under the combined action of the adjusting jacks 314, the jack nut 316 and the second spring 315, the jack nut 316 is installed in the adjusting block 311. Under the action of the second spring 315, under the outward force of the adjusting jack screw 314, the jack screw nut 316 is stepped, and the force is reasonable, and the adjusting block 311 can move back and forth, left and right. Because the adjustment block 311 is installed on the nozzle plate 200, and the nozzle plate 200 is also acted by the limit rotation device 320 at the rear end, it can only deflect along the axis of the rotation positioning pin 321 and guide the limit block 322 along the rear. The inner groove moves back and forth. Since each color bar assembly and each equipment frame is provided with the level adjustment mechanism, the nozzle plates 200 on all the color bar components can be adjusted to keep the nozzle plates 200 parallel to each other and aligned to the front and rear to meet the printing requirements. . After the adjustment is completed, the nozzle plate 200 is fixed with the second pressing bolt 3111 and the second pressing block 317 . The second pressing bolt 3111 is fastened on the middle adjusting block 311 .

As shown in FIGS. 11-14 , the height adjustment mechanism 400 includes height adjustment devices 410 installed between the nozzle plate 100 and the color bar frame 500 and located at both ends, and a height auxiliary adjustment device 420 located in the middle. The height auxiliary adjustment devices 420 are spaced apart from each other. It is arranged in the middle of the nozzle plate 100 and the color bar frame 500 .

The height adjustment device 410 includes a first adjustment bolt 411 , a first nut 412 , and a first spring 413 . The first adjustment bolt 411 penetrates the nozzle plate 100 from bottom to top and is threadedly connected to the bottom plate 510 of the color bar frame 500 . The first adjustment bolt 411 The nozzle plate 100 and the color bar frame 500 are fastened by the first nut 412 at its free end, the first spring 413 is arranged between the nozzle plate 100 and the bottom plate 510 and is sleeved on the first adjusting bolt 411; the height auxiliary adjusting device 420 includes The washer 421, the second nut 422 and the second adjusting bolt 423. The second adjusting bolt 423 passes through the square tube beam 530 of the color bar frame 500 and is threadedly locked and fixed with the nozzle plate 100. The washer 421 and the second nut 422 are both Two washers 421 are provided and sleeved on the second adjusting bolts 423 , and the two washers 421 are locked on the upper and lower end surfaces of the square tube beam 530 through the second nuts 422 .

The nozzle plate 100 is provided with a reinforcing rib 110 , and the second adjusting bolt 423 is threadedly connected with the reinforcing rib 110 of the nozzle plate 100 to ensure the connection strength of the second adjusting bolt 423 .

The auxiliary height adjustment devices 420 are located on both sides of the shower head plate 100 , and at least two auxiliary height adjustment devices 420 are provided on each side and are evenly spaced. The height auxiliary adjustment devices located on both sides of the nozzle mounting plate can better ensure the flatness of the nozzle mounting plate.

A pressure riveting nut 520 is integrally formed on the upper end surface of the bottom plate 510 , and the first adjusting bolt 411 is threaded through the pressure riveting nut 520 and then locked and fixed by the first nut 412 . The bottom plate of the color bar frame can better realize the thread matching with the first adjusting bolt.

When the height adjustment device 410 is to be adjusted, the first adjustment bolt 411 can be rotated to change the height of the four corners of the nozzle plate 100 to ensure that the four corners of the nozzle plate 100 have the same height and reach a predetermined height value. Then, lock the first nut 412 at the uppermost part of the first adjusting bolt 411 to ensure that the height is fixed.

When the height auxiliary adjusting device 420 is to be adjusted, when the adjustment is started, the lower washer 421 and the second nut 422 are not in close contact with the square tube and keep a certain distance, while the upper washer 421 and the second nut 422 are in contact with the square tube By rotating the second nut 422 above, the height of the nozzle plate 100 is driven to change upward, and after adjustment, it is ensured that the center of the nozzle plate 100 is not concave. After completion, the lower second nut 422 is locked and fixed.

Both sides of the shower head plate 100 are provided with heating belts 120, and the heating belts 120 are arranged on the inner side of the reinforcing ribs 110 on both sides of the shower head plate 100 for heating the shower head plate 100, and finally the heat is conducted through the shower head plate 100 to improve the installation on the shower head plate 100. The temperature of the showerhead 200 on the 100. The shower head plate 100 is provided with a temperature sensor 130, and the temperature sensor 130 is connected to the controller. The temperature sensor 130 is responsible for detecting the temperature of the spray head 200, and keeps the temperature constant through a corresponding controller.

A nozzle protective plate 600 is provided below the nozzle 200 , a Mylar film 700 is arranged between the nozzle 200 and the nozzle protective plate 600 , and a square hole corresponding to the nozzle 200 is formed on the Mylar film 700 . The thickness of the Mylar film 700 is 0.2 mm. The Mylar film 700 is provided with square holes according to the arrangement of the nozzles 200 .

The above embodiments are only to illustrate the technical concept and characteristics of the present invention, and their purpose is to allow those familiar with the art to understand the content of the present invention and implement it, and cannot limit the scope of protection of the present invention. Equivalent changes or modifications made should all be included within the protection scope of the present invention.

Claims (10)

1. A nozzle adjusting system of a digital ink-jet printer comprises a plurality of nozzle plates (100) which are parallel to each other, a plurality of nozzles (200) are arranged on each nozzle plate (100), wherein part of the nozzles (200) are fixed on the nozzle plates (100), and the digital ink-jet printer is characterized in that: and the sprayer head plate (100) near each of the rest sprayers (200) is provided with a sprayer head adjusting mechanism (800), a horizontal adjusting mechanism (300) for adjusting the horizontal position of the sprayer head plate (100) and an equipment frame are arranged between the sprayer head plate (100) and the equipment frame, and a height adjusting mechanism (400) is arranged between the sprayer head plate (100) and the color bar frame (500).

2. The head adjustment system for a digital inkjet printer according to claim 1, wherein: each spray head adjusting mechanism (800) comprises a spray head adjusting device (810) and a spring piece (820);

the three spray head adjusting devices (810) are respectively positioned at three corners of the spray head (200), and each corner is provided with a right-angle groove (210) which can drive the spray head (200) to move back and forth and left and right on the spray head plate (100);

the spring pieces (820) are positioned at the rest one corner of the spray head (200) and one corner adjacent to the corner, the spring pieces (820) at the rest one corner are arranged in two staggered mode, the free ends of the spring pieces (820) are tightly attached to two adjacent sides of the corner, and the spray head (200) is forced to abut against the three spray head adjusting devices (810).

3. The head adjustment system for a digital inkjet printer according to claim 2, wherein: the spray head adjusting device (810) comprises a prepressing bolt (811), an adjusting bolt (812), a first pressing bolt (813), a first pressing block (814) and an adjusting and mounting bracket (815);

the pre-pressing bolt (811) penetrates through the sprayer (200), penetrates through the sprayer plate (100) and is in threaded connection with a pre-pressing nut (816) in the sprayer plate (100), the pre-pressing nut (816) can rotate in the sprayer plate (100) and moves in the thickness direction of the sprayer plate (100), a pre-pressing spring (817) is sleeved on the pre-pressing bolt (811) in the sprayer plate (100) and is pressed by the pre-pressing nut (816), the pre-pressing bolt (811) is forced by the elasticity of the pre-pressing spring (817) to press the sprayer (200) on the sprayer plate (100), and a gap is reserved between the pre-pressing bolt (811) and the sprayer (200);

the adjusting bolt (812) penetrates through the shower head plate (100), the shaft of the adjusting bolt (812) is tightly matched with the shower head plate (100) and can rotate relatively, an adjusting compression spring (818) is sleeved on the adjusting bolt (812) penetrating through the shower head plate (100), the adjusting compression spring (818) is limited by a spring sleeve (819) in threaded connection with the tail of the adjusting bolt (812), the adjusting compression spring (818) compresses the head of the adjusting bolt (812) on the shower head plate (100), the head of the adjusting bolt (812) is of an eccentric structure and is provided with an inner hexagonal hole, and the head of the adjusting bolt (812) is abutted against the side face of the right-angle groove (210) of the shower head (200);

the adjusting and mounting bracket (815) is fixed on the shower head plate (100), the first compression bolt (813) penetrates through the shower head plate (100) in a threaded mode and is fixedly connected with the first compression block (814) in a threaded mode, one end of the first compression block (814) is clamped on the adjusting and mounting bracket (815), and the other end of the first compression block compresses the spring sleeve (819).

4. The head adjustment system for a digital inkjet printer according to claim 3, wherein: and the adjusting bolt (812) of part of the nozzle adjusting device (810) is of a non-eccentric structure, and the head part of the adjusting bolt (812) is coincided with the central axis of the shaft part.

5. The head adjustment system for a digital inkjet printer according to claim 1, wherein: the horizontal adjusting mechanism (300) comprises a deflection alignment adjusting device (310) and a limiting rotating device (320), the rear end of the shower head plate (100) rotates with the equipment frame through the limiting rotating device (320) and can move relatively, the front end of the shower head plate (100) is connected with the equipment frame through the deflection alignment adjusting device (310), and the front end of the shower head plate (100) can be controlled to move in the front-back direction and the left-right direction.

6. The head adjustment system for a digital inkjet printer according to claim 5, wherein: the limiting and rotating device (320) comprises a rotating positioning pin (321) and a rear guiding limiting block (322), the rear guiding limiting block (322) is fixed on the equipment frame, the rear guiding limiting block (322) is U-shaped, the rotating positioning pin (321) is clamped in the rear guiding limiting block (322), the rotating positioning pin and the rear guiding limiting block can rotate and move relatively, and the rotating positioning pin (321) is connected with the rear end of the nozzle plate (100);

the deflection alignment adjusting device (310) comprises an adjusting block (311), a fixing block (312), limiting bolts (313) and adjusting jackscrews (314), wherein the adjusting block (311) is fixedly arranged below the front end of the shower head plate (100), the adjusting block (311) is of a frame-shaped structure, the fixing block (312) is fixed on an equipment frame and is located in the adjusting block (311), a gap is reserved between the fixing block (312) and the adjusting block (311), the limiting bolts (313) are provided with two adjacent sides which are in threaded connection with the adjusting block (311), the adjusting jackscrews (314) are provided with two adjacent sides which are in threaded connection with the adjusting block (311), and the adjusting jackscrews (314) and the two limiting bolts (313) respectively tightly support the fixing block (312).

7. The head adjustment system for a digital inkjet printer according to claim 5, wherein: the height adjusting mechanism (400) comprises a height adjusting device (410) which is arranged between the spray head plate (100) and the color bar frame (500) and is positioned at two ends, and a height auxiliary adjusting device (420) which is positioned in the middle, wherein the height auxiliary adjusting device (420) is arranged in the middle of the spray head plate (100) and the color bar frame (500) at intervals.

8. The head adjustment system for a digital inkjet printer according to claim 7, wherein: the height adjusting device (410) comprises a first adjusting bolt (411), a first nut (412) and a first spring (413), wherein the first adjusting bolt (411) penetrates through the nozzle plate (100) from bottom to top and is in threaded connection with the bottom plate (510) of the color bar frame (500), the first adjusting bolt (411) fastens the nozzle plate (100) and the color bar frame (500) through the first nut (412) at the free end of the first adjusting bolt, and the first spring (413) is arranged between the nozzle plate (100) and the bottom plate (510) and sleeved on the first adjusting bolt (411);

height auxiliary adjusting device (420) include gasket (421), second nut (422) and second adjusting bolt (423), second adjusting bolt (423) pass square pipe crossbeam (530) of colour bar frame (500) and with shower nozzle board (100) screw locking fixed, gasket (421), second nut (422) all are provided with two and overlap and establish on second adjusting bolt (423), two gasket (421) lock upper and lower terminal surface at square pipe crossbeam (530) through second nut (422).

9. The head adjustment system for a digital inkjet printer according to claim 1, wherein: the shower head plate is characterized in that heating belts (120) are arranged on two sides of the shower head plate (100), the heating belts (120) are arranged on the inner sides of reinforcing ribs (110) on two sides of the shower head plate (100), a temperature sensor (130) is arranged on the shower head plate (100), and the temperature sensor (130) is connected with a controller.

10. The head adjustment system for a digital inkjet printer according to claim 1, wherein: shower nozzle (200) below is provided with shower nozzle guard plate (600), set up wheat between shower nozzle (200) and shower nozzle guard plate (600) board and draw membrane (700), be provided with the square hole that corresponds with shower nozzle (200) on wheat draws membrane (700).

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