CN111674157A

CN111674157A - Nozzle adjusting system of digital ink-jet printer

Info

Publication number: CN111674157A
Application number: CN202010523245.8A
Authority: CN
Inventors: 马可
Original assignee: System (china) Technology Co ltd
Current assignee: System (china) Technology Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-09-18

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

Nozzle adjusting system of digital ink-jet printer

Technical Field

The invention relates to a spray head adjusting system of a digital ink-jet printer.

Background

The nozzle plate component of the ink-jet printer is loaded with a plurality of arranged nozzles, the nozzles are core components for completing ink-jet printing, and the relative positions of all the nozzles on the nozzle plate must be ensured to be parallel and aligned so as to ensure that all the nozzles on all the nozzles are finally arranged in order and accurate in position, thereby ensuring the printing quality. When the ceramic tile is printed, each spray hole of each spray head sprays tiny ink drops to the surface of the ceramic tile to form patterns, and once the position of each spray head is inclined and inaccurate, the printing effect is influenced. How to adjust the spray head and ensure the printing quality is a problem which needs to be solved urgently at present.

Disclosure of Invention

In order to overcome the above disadvantages, the present invention provides a nozzle adjustment system for a digital inkjet printer, which can be adjusted in multiple directions to ensure the printing quality of the nozzle.

In order to achieve the above purposes, the invention adopts the technical scheme that: a spray head adjusting system of a digital ink-jet printer 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 an equipment frame.

The spray head adjusting system of the digital ink-jet printer has the advantages that the spray head adjusting mechanism is used for adjusting the position of each spray head on the spray head plate and finely adjusting the spray heads; the horizontal adjusting mechanism is used for adjusting the position of the nozzle plate provided with a plurality of nozzles in the horizontal direction, and then ensuring the horizontal positions of the plurality of nozzles on each nozzle plate so as to roughly adjust the horizontal positions of the nozzles; and the height adjusting mechanism is used for adjusting the position of the nozzle plate provided with the plurality of nozzles in the vertical direction, further ensuring the height position of the plurality of nozzles on each nozzle plate and coarsely adjusting the height position of the nozzles. Through the arrangement of the spray head adjusting mechanism, the horizontal adjusting mechanism and the height adjusting mechanism, the spray head can be accurately adjusted in multiple directions, and finally the printing quality of the spray head is ensured.

Preferably, each spray head adjusting mechanism comprises a spray head adjusting device and a spring piece; the three spray head adjusting devices are respectively positioned at three corners of the spray head, and each corner is provided with a right-angle groove which can drive the spray head to move back and forth and left and right on the spray head plate; the spring pieces are positioned at the rest one corner of the sprayer and one corner adjacent to the corner, the spring pieces positioned at the rest one corner are arranged in a staggered mode, and the free ends of the spring pieces are tightly attached to two adjacent sides of the corner, so that the sprayer is forced to abut against the three sprayer adjusting devices. The three eccentric adjusting devices are positioned at the three corners of the spray head and used for adjusting the left, right, front and back positions of each spray head in the horizontal direction, and the three spring pieces force the spray heads to always abut against the three spray head adjusting devices.

Preferably, the nozzle adjusting device comprises a prepressing bolt, an adjusting bolt, a first pressing block and an adjusting mounting bracket; the pre-pressing bolt penetrates through the spray head and penetrates through the spray head plate and is in threaded connection with a pre-pressing nut in the spray head plate, the pre-pressing nut can rotate in the spray head plate and moves in the thickness direction of the spray head plate, a pre-pressing spring is sleeved on the pre-pressing bolt in the spray head plate and is abutted by the pre-pressing nut, the pre-pressing bolt is forced by the elasticity of the pre-pressing spring to press the spray head on the spray head plate, and a gap is reserved between the pre-pressing bolt and the spray head; the adjusting bolt penetrates through the nozzle plate, a shaft of the adjusting bolt is tightly matched with the nozzle plate and can rotate relatively, an adjusting compression spring is sleeved on the adjusting bolt penetrating through the nozzle plate and limited by a spring sleeve in threaded connection with the tail of the adjusting bolt, the head of the adjusting bolt is compressed on the nozzle plate by the adjusting compression spring, 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 abutted against the side face of a right-angle groove of the nozzle; the adjusting and mounting bracket is fixed on the nozzle plate, the first compression bolt penetrates through the nozzle plate in a threaded mode and is fixedly connected with the first compression block in a threaded mode, one end of the first compression block is clamped on the adjusting and mounting bracket, and the other end of the first compression block compresses the spring sleeve. The installation and adjustment structure of the spray heads is optimized, the adjustment precision is improved, and finally the spray holes of the spray heads are orderly arranged and are accurate in position, so that the printing quality is ensured. The printing width of the printing equipment is improved, and the printing quality is stable.

Preferably, part of the adjusting bolts of the nozzle adjusting device are of non-eccentric structures, and the head parts of the adjusting bolts are overlapped with the central axis of the shaft part. When the nozzle is adjusted, a central nozzle is firstly determined, and the central nozzle is firstly adjusted and then fixed. And other spray heads are correspondingly adjusted according to the position of the central spray head. Then, a central nozzle is determined, and the rest nozzles are adjusted according to a second central nozzle, so that the nozzles with a large number on a longer nozzle plate can be adjusted. The problem that the existing nozzle plate cannot meet the requirement due to the fact that nozzles are installed in the existing nozzle plate and are increased gradually, the nozzle plate is long, and the existing nozzle plate cannot meet the requirement can be solved.

Preferably, the pre-pressing nut is provided with a straight groove or a cross groove matched with the screwdriver. When adjusting, the pre-pressing nut is firstly fixed by a screwdriver, the pre-pressing bolt is rotated, and the preset torsion is achieved under the action of the pre-pressing spring.

Preferably, the horizontal adjusting mechanism comprises a deflection alignment adjusting device and a limit rotating device, the rear end of the shower head plate rotates with the equipment frame through the limit rotating device and can move relatively, and the front end of the shower head plate is connected with the equipment frame through the deflection alignment adjusting device and can control the front end of the shower head plate to move in the front-back and left-right directions. Adopt one end rotatory, the mode that the other end was adjusted, then adjust the position all around of monoblock shower nozzle board in the horizontal direction, simple structure adjusts laborsavingly, and is consuming time shorter, has improved adjustment efficiency.

Preferably, the limiting and rotating device comprises a rotating positioning pin and a rear guiding limiting block, the rear guiding limiting block is fixed on the equipment frame and is in a U shape, the rotating positioning pin is clamped in the rear guiding limiting block and can rotate and move relatively, and the rotating positioning pin is connected with the rear end of the nozzle plate; the adjusting device that aligns deflects includes adjusting block, fixed block, spacing bolt, adjustment jackscrew, adjusting block fixed mounting is in the below of shower nozzle board front end, the adjusting block is frame column structure, the fixed block is fixed on equipment frame and is located the adjusting block, leave the clearance between fixed block and the adjusting block, spacing bolt be provided with two and with the adjacent both sides threaded connection of adjusting block, the adjustment jackscrew be provided with two and with the remaining adjacent both sides threaded connection of adjusting block, two adjustment jackscrew and two spacing bolts support tight fixed block respectively. The rear end of the nozzle plate rotates around the central shaft of the rotary positioning pin, and the rotary positioning pin can move back and forth on the U-shaped rear guide limiting block; the front end of the shower head plate adjusts the front, back and left and right positions of the adjusting block in the fixed block through two adjusting jackscrews and two limiting bolts, so that the front, back and left and right positions of the shower head plate are adjusted, and when the front end is adjusted, the rear end of the shower head plate moves back and forth and rotates in the rear guiding limiting block. And then, the nozzle plate which ensures a plurality of color strips is parallel to each other, and the front and the back of the nozzle plate are aligned, so that the printing accuracy is improved.

Preferably, the height adjusting mechanism comprises height adjusting devices which are arranged between the shower head plate and the color bar frame and are positioned at two ends, and a middle height auxiliary adjusting device, and the height auxiliary adjusting devices are arranged in the middle of the shower head plate and the color bar frame at intervals. The whole shower nozzle board can keep a better flatness, guarantee the height of each shower nozzle on the shower nozzle board unanimous, especially can eliminate the phenomenon of middle concave.

Preferably, the height adjusting device comprises a first adjusting bolt, a first nut and a spring, the first adjusting bolt penetrates through the nozzle plate from bottom to top and is in threaded connection with the bottom plate of the color bar frame, the first adjusting bolt fastens the nozzle plate and the color bar frame through the first nut at the free end of the first adjusting bolt, and the spring is arranged between the nozzle plate and the bottom plate and sleeved on the first adjusting bolt; the height auxiliary adjusting device comprises a gasket, a second nut and a second adjusting bolt, the second adjusting bolt penetrates through a square tube cross beam of the color bar frame and is fixed with the nozzle plate in a thread locking mode, the gasket and the second nut are both provided with two pieces and sleeved on the second adjusting bolt, and the gasket is locked on the upper end face and the lower end face of the square tube cross beam through the second nut.

Preferably, in order to solve the problem that the temperature balance of each spray head cannot be guaranteed in the prior art, heating belts are arranged on two sides of the spray head plate, the heating belts are arranged on the inner sides of the reinforcing ribs on two sides of the spray head plate, and a temperature sensor is arranged on the spray head plate and connected with a controller. Used for heating the shower nozzle plate, and finally the heat is conducted through the shower nozzle plate to improve the temperature of the shower nozzle arranged on the shower nozzle plate. The temperature sensor is responsible for detecting the temperature of the spray head, and the temperature is kept constant through a corresponding controller. The beneficial effects of the scheme and the technical problems to be solved are as follows: the temperature balance of each spray head is ensured.

Preferably, in order to solve the problem that the existing nozzle plate assembly is poor in sealing effect, and pollutants in air such as dust and the like are easily deposited on a printing nozzle, and the printing effect is finally affected, a nozzle protection plate is arranged below the nozzle, a mylar film is arranged between the nozzle and the nozzle protection plate, and square holes corresponding to the nozzle are formed in the mylar film. So that the bottom of the nozzle plate is sealed with the nozzle plate to ensure the inside of the printing core part to be clean.

Drawings

FIG. 1 is an exploded view of the showerhead adjustment mechanism of the present embodiment in cooperation with a showerhead plate;

FIG. 2 is a perspective view of a head adjusting mechanism in the present embodiment;

FIG. 3 is a bottom view of the showerhead adjustment mechanism of the present embodiment in cooperation with the showerhead plate;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;

FIG. 5 is a sectional view of the head adjustment mechanism in this embodiment;

fig. 6 is a perspective view of the horizontal adjustment mechanism of the present embodiment in cooperation with the showerhead plate;

FIG. 7 is an enlarged view of a portion of FIG. 6 at B;

FIG. 8 is an exploded view of the yaw alignment adjustment apparatus of the present embodiment;

FIG. 9 is a cross-sectional view of the yaw alignment adjustment apparatus according to this embodiment;

FIG. 10 is a perspective view of the rotation limiting device in this embodiment;

FIG. 11 is a perspective view of the height adjustment mechanism in this embodiment in cooperation with the color bar frame;

FIG. 12 is an exploded view of the height adjustment mechanism in cooperation with the color bar frame in this embodiment;

FIG. 13 is a cross-sectional view of the height adjustment mechanism of the present embodiment;

fig. 14 is a sectional view of the height auxiliary adjusting device in this embodiment.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

Referring to fig. 1 to 14, a head adjustment system of a digital inkjet printer according to this embodiment includes a plurality of head plates 100 parallel to each other, a plurality of heads 200 are mounted on each head plate 100, some of the heads 200 are fixed to the head plate 100, head adjustment mechanisms 800 for finely adjusting each head 200 are provided on the head plates 100 near the remaining heads 200, a horizontal adjustment mechanism 300 for adjusting the horizontal position of the head plate 100 is provided between the head plate 100 and an apparatus frame, the heads 200 are coarsely adjusted in the horizontal position, and a height adjustment mechanism 400 is provided between the head plate 100 and a color bar frame 500, and the heads 200 are coarsely adjusted in the height position.

As shown in fig. 1-5, each of the nozzle adjustment mechanisms 800 in this embodiment includes a nozzle adjustment device 810 and a spring plate 820; the three nozzle adjusting devices 810 are respectively positioned at three corners of the nozzle 200, and each corner is provided with a right-angle groove 210 which can drive the nozzle 200 to move back and forth and left and right on the nozzle plate 100; the spring pieces 820 are located at the remaining one corner of the spray head 200 and one corner adjacent to the corner, two spring pieces 820 located at the remaining one corner are arranged in a staggered manner, and the free ends of the spring pieces 820 are tightly attached to the adjacent two sides of the corner, so that the spray head 200 is forced to abut against the three spray head adjusting devices 810.

The nozzle 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 mounting bracket 815; a pre-pressing bolt 811 penetrates through the sprayer 200 and penetrates 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 along 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, the adjusting bolt 812 penetrating through the shower head plate 100 is sleeved with an adjusting compression spring 818, 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 pressing bolt 813 penetrates through the shower head plate 100 in a threaded manner and is fixed with the first pressing block 814 in a threaded manner, one end of the first pressing block 814 is clamped on the adjusting and mounting bracket 815, and the other end of the first pressing block 814 presses the spring sleeve 819. The pre-pressing nut 816 is provided with a straight groove or a cross groove matched with the screwdriver.

The adjusting bolt 812 with an eccentric head and a hexagon socket is used as an adjusting screw, and the front, back, left and right positions and the deflection angle of the nozzle 200 are precisely controlled by adjusting the angle of the adjusting bolt 812. Two of the adjustment bolts 812 abut against the sides of right-angled slot 210 in the long direction of showerhead 200, and the remaining one of adjustment bolts 812 abuts against the sides of right-angled slot 210 in the short direction of showerhead 200.

The adjusting bolt 812 of part of the nozzle head adjusting device 810 is of a non-eccentric structure, and the head of the adjusting bolt 812 coincides with the central axis of the shaft part. The nozzle fixed by the non-eccentric structure adjusting bolt 812 is a central nozzle. Taking 21 nozzles as an example, the nozzle number 9 is selected as the first center nozzle S9, the nozzle number 17 is selected as the second center nozzle S17, the nozzles number 1-8 (8) are on the left side of the first center nozzle, and the nozzles number 10-17 (8) are on the right side of the first center nozzle. When adjusting, the position of the first central nozzle is fixed, and the positions of No. 1-8 nozzles and No. 10-17 nozzles are adjusted by taking the first central nozzle as a positioning reference. And after the adjustment is finished, the positions of No. 18-21 spray heads are adjusted by taking the second central spray head as a reference.

When the nozzle adjusting device 810 with an eccentric structure is used for adjusting the nozzle 200, the nozzle 200 is pressed on the nozzle plate 100 under the action of the pre-pressing bolt 811, the pre-pressing nut 816 and the pre-pressing spring 817. Since the preload bolt 811 has a gap from the head mounting hole of the head 200, the position of the head 200 on the head 100 can be finely adjusted. Because the pre-pressing nut 816 is provided with the straight groove, the pre-pressing nut 816 can be fixed by a screwdriver, and the pre-pressing bolt 811 is rotated to adjust the elastic force of the pre-pressing spring 817 which is compressed.

The eccentric adjustment bolt 812 and the spring housing 819 are screwed together (the head of the spring housing 819 is hexagonal) and pressed against the showerhead plate 100 by adjusting the compression spring 818, and the shaft portion of the eccentric adjustment bolt 812 is precisely fitted to the showerhead plate 100 and can rotate. The head of the eccentric adjustment bolt 812 is in contact with the shower head 200. When adjusting, the eccentric adjusting bolt 812 is rotated by a wrench, because the shaft part and the head part of the eccentric adjusting bolt 812 are eccentric by 0.1mm, the left, right, front and back positions of the nozzle 200 are changed by rotating the adjusting bolts 812 at three corners, and the spring piece 820 at the remaining one corner presses the nozzle 200.

After the adjustment is completed, the first pressing bolt 813 needs to be screwed (before the adjustment, the first pressing bolt 813 is in a loose state, so that the eccentric adjusting bolt 812 can be rotated), and thus the first pressing block 814 presses the spring sleeve 819 to fix the position of the eccentric adjusting bolt 812, so that the position of the spray head 200 is fixed. The first compression block 814 is captured within the adjustment mounting bracket 815 to ensure that the position of the first compression block 814 does not deflect. And then the three eccentric adjusting bolts 812 can be adjusted by rotation, so that the front-back, left-right and deflection of the spray head 200 can be adjusted. Finally, the spray holes of the spray heads 200 are arranged in order and aligned accurately.

As shown in fig. 6 to 10, the horizontal adjustment mechanism 300 includes a deflection alignment adjustment device 310 and a rotation limiting device 320, the rear end of the showerhead plate 100 rotates and can move relative to the apparatus frame via the rotation limiting device 320, and the front end of the showerhead plate 100 is connected to the apparatus frame via the deflection alignment adjustment device 310 and can control the front end of the showerhead plate 100 to move in the front-back and left-right directions.

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 321 and the rear guiding limiting block 322 can rotate and move relatively, and the rotating positioning pin 321 is connected with the rear end of the shower head plate 100; the deflection alignment adjusting device 310 comprises an adjusting block 311, a fixing block 312, a limiting bolt 313 and an adjusting jackscrew 314, wherein the adjusting block 311 is fixedly installed below the front end of the shower head plate 100, the adjusting block 311 is in a frame-shaped structure, the fixing block 312 is fixed on the equipment frame and is positioned in the adjusting block 311, a gap is reserved between the fixing block 312 and the adjusting block 311, two limiting bolts 313 are arranged and are in threaded connection with two adjacent sides of the adjusting block 311, two adjusting jackscrews 314 are arranged and are in threaded connection with the two remaining adjacent sides of the adjusting block 311, and the two adjusting jackscrews 314 and the two limiting bolts 313 respectively abut against the fixing block 312.

Wherein, a second spring 315 is arranged between the limit bolt 313 and the fixing block 312, and the limit bolt always abuts against the fixing block, thereby facilitating the adjustment of the adjusting jackscrew. Jackscrew nuts 316 are fixed on two adjacent sides of the adjusting block 311, the two adjusting jackscrews 314 are respectively in threaded fit with the two jackscrew nuts 316, and the jackscrew nuts 316 are step-shaped and are reasonably stressed.

A second pressing block 317 is arranged above the shower head plate 100, a second pressing bolt 3111 is arranged on the second pressing block 317, the second pressing bolt 3111 penetrates through the shower head plate 100 and is in threaded connection with the top of the fixing block 312, and a gap is reserved between the second pressing bolt 3111 and the shower head plate 100. After the adjustment of the head plate 100 is completed, the head mounting plate is fixed by the second pressing bolt 3111 and the second pressing block 317.

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

A front guide limiting block 319 is arranged below the adjusting block 311, the front guide limiting block 319 is fixed on the equipment frame, and a fixing block 312 penetrating through the adjusting block 311 is fixed on the front guide limiting block 319 through a bolt.

The opening of the rear guide limiting block 322 is in a horn shape, the rotary positioning pin 321 is in a structure with the middle diameter larger than the diameters of the two ends, and the rotary positioning pin 321 is in an arc shape from top to bottom. So that the shower head plate is not stuck when being pushed into the equipment frame.

The head of the adjusting jack 314 is provided with a pit mark 3110. Can regard as the reference point during the adjustment, can make things convenient for operating personnel to record the number of turns of adjustment.

When the horizontal position of the shower head plate 200 is to be adjusted, the two adjusting jackscrews 314 are rotated, under the combined action of the adjusting jackscrews 314, the jackscrew nuts 316 and the second springs 315, the jackscrew nuts 316 are installed in the adjusting blocks 311, and under the action of the second springs 315, the outward acting force of the adjusting jackscrews 314 is applied, the jackscrew nuts 316 are step-shaped and reasonably stressed, and the adjusting blocks 311 can move front, back, left and right. Since the adjustment block 311 is mounted on the showerhead plate 200, the showerhead plate 200 is also rotated by the rotation restricting means 320 at the rear end, and thus can be deflected only along the axial center of the rotation positioning pin 321 and moved back and forth along the inner groove of the rear guide stopper 322. Since each equipment frame of each color bar assembly is provided with the horizontal adjusting mechanism, the shower head plates 200 on all the color bar assemblies can be adjusted, so that the shower head plates 200 are kept parallel to each other and aligned front and back, and the printing requirement is met. After the adjustment is completed, the showerhead plate 200 is fixed by the second pressing bolt 3111 and the second pressing block 317. A second pressure bolt 3111 is fastened to the middle adjusting block 311.

As shown in fig. 11 to 14, the height adjusting mechanism 400 includes a height adjusting device 410 installed between the showerhead plate 100 and the color bar frame 500 at both ends, and a height auxiliary adjusting device 420 located in the middle, and the height auxiliary adjusting device 420 is spaced apart from the center of the showerhead plate 100 and the color bar frame 500.

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 shower head 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 shower head plate 100 and the color bar frame 500 through the first nut 412 at the free end of the first adjusting bolt 411, and the first spring 413 is arranged between the shower head plate 100 and the bottom plate 510 and is sleeved on the first adjusting bolt 411; the height auxiliary adjusting device 420 comprises a gasket 421, a second nut 422 and a second adjusting bolt 423, the second adjusting bolt 423 penetrates through the square tube cross beam 530 of the color bar frame 500 and is locked and fixed with the nozzle plate 100 through threads, the gasket 421 and the second nut 422 are both provided with two gaskets and sleeved on the second adjusting bolt 423, and the two gaskets 421 are locked on the upper end surface and the lower end surface of the square tube cross beam 530 through the second nut 422.

The reinforcing ribs 110 are arranged on the shower head plate 100, and the second adjusting bolts 423 are in threaded connection with the reinforcing ribs 110 of the shower head plate 100, so that the connection strength of the second adjusting bolts 423 is ensured.

The height auxiliary adjusting devices 420 are located at both sides of the showerhead plate 100, and at least two height auxiliary adjusting devices 420 are provided at each side and are uniformly distributed at intervals. The auxiliary height adjusting devices positioned on the two sides of the spray head mounting plate can better ensure the flatness of the spray head mounting plate.

The upper end surface of the bottom plate 510 is integrally formed with a rivet pressing nut 520, and the first adjusting bolt 411 is fastened and fixed by a first nut 412 after the screw thread passes through the rivet pressing nut 520. The bottom plate of the color bar frame can be better matched with the first adjusting bolt in a threaded manner.

When the height adjusting device 410 is adjusted, the first adjusting bolt 411 is rotated to change the heights of the four corners of the showerhead plate 100, thereby ensuring the heights of the four corners of the showerhead plate 100 to be consistent and reaching a predetermined height value. Then, the first nut 412 located at the uppermost portion of the first adjusting bolt 411 is locked, so as to ensure that the height is fixed.

When the auxiliary height adjusting device 420 is to be adjusted, the gasket 421 and the second nut 422 below the auxiliary height adjusting device are not tightly attached to the square tube and keep a certain distance when the auxiliary height adjusting device starts to be adjusted, the gasket 421 and the second nut 422 above the auxiliary height adjusting device are tightly attached to the square tube, the second nut 422 above the auxiliary height adjusting device is rotated to drive the height of the shower head plate 100 to be changed upwards, and the middle of the shower head plate 100 is guaranteed not to be concave downwards after adjustment. After completion, the lower second nut 422 is locked and fixed.

The heating tapes 120 are disposed on both sides of the showerhead plate 100, and the heating tapes 120 are disposed inside the ribs 110 on both sides of the showerhead plate 100 to heat the showerhead plate 100, and finally, the heat is conducted through the showerhead plate 100 to increase the temperature of the showerhead 200 mounted on the showerhead plate 100. The shower head plate 100 is provided with a temperature sensor 130, and the temperature sensor 130 is connected to a controller. The temperature sensor 130 is responsible for detecting the temperature of the showerhead 200, and the temperature is kept constant by a corresponding controller.

A nozzle protection plate 600 is arranged below the nozzle 200, a mylar film 700 is arranged between the nozzle 200 and the nozzle protection plate 600, and a square hole corresponding to the nozzle 200 is formed in the mylar film 700. The mylar film 700 is 0.2mm thick, square holes are formed in the mylar film 700 according to arrangement of the spray heads 200, the size of each square hole is smaller than the outer size of each spray head 200 by 0.1mm, and the spray heads 200 can penetrate through the square holes.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

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).