Inkjet printing nozzle cleaning machine

Abstract

The present invention discloses an inkjet printing nozzle cleaning machine, comprising a frame and a cleaning chamber mounted on the frame, a cleaning pipeline connected to the cleaning chamber and a control device, a front end of the cleaning chamber arranged on the front end of the frame 1 is provided with a placement slot, a cleaning liquid barrel is provided under the frame, an ultrasonic heating cleaning device is also connected to the cleaning chamber, the control device comprises a display control screen arranged on the upper part of the frame, and a rear end electric control and control valve arranged on the frame, characterized in that a nozzle universal mounting bracket is provided on the cleaning tank, the nozzle is fixed on the universal mounting bracket through the cleaning mounting bracket, the cleaning pipeline adopts a single barrel circulation, and a plurality of pumps, filters, conversion valves, cleaning liquid barrels, and cleaning tanks are used to realize circulation cleaning. The present invention has the advantages of simple structure, low cost, convenient and quick use, and good cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of inkjet printer nozzle cleaning, in particular to an inkjet printer nozzle cleaning machine. Background Art

[0002] Nozzle clogging is one of the common faults of inkjet printing. Nozzle clogging will lead to a decline in printing quality. Severe clogging will cause many horizontal lines or even blurred printing on the printed screen. The cost of replacing the print nozzle is high, so regular cleaning of the inkjet print nozzle is a more economical method. Therefore, it is necessary to design an inkjet print nozzle machine for easy cleaning.

[0003] The invention patent technology and products of the invention entitled "System and method for cleaning inkjet print heads", application (patent) number CN201380003762.0, application publication number CN104321198B, application date 2013.10.29, and application publication date 2016.08.31, which currently have a monopoly in the market, are a system for cleaning inkjet print heads, which is intended to clean these print heads by a pressurized fluid selected from a liquid solvent and a gaseous fluid such as air. The pressurized fluid passes through the various spaces in the inkjet print head through which the ink usually flows when the ink is ejected, so that this path is adopted in two circulation directions in order to clean much more effectively. For cleaning, the inkjet print head is placed in the main barrel so that the lower part of the inkjet print head is immersed in the liquid solvent contained in the first barrel, and the barrel also includes, among other components, a height control device for adjusting the optimal height of the liquid solvent in the main barrel.

[0004] The above-mentioned system for cleaning the inkjet print head has a relatively complex structure. It drives the liquid flow by air pressure and uses barrels A and B to pump the liquid back and forth. It has high manufacturing precision requirements, high cost, is prone to failure, and has a single cleaning mode. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and to provide an inkjet printing nozzle cleaning machine which has a simple and reliable structure, low cost, and multiple cleaning modes to improve the cleaning effect.

[0006] The present invention achieves the above object through the following technical solutions:

[0007] An inkjet printing nozzle cleaning machine includes a frame and a cleaning tank installed on the frame, a cleaning pipeline connected to the cleaning tank and a control device. The front end of the cleaning tank arranged on the front end of the frame 1 is provided with a placement tank, a cleaning liquid barrel is provided under the frame, and an ultrasonic heating cleaning device is also connected to the cleaning tank. The control device includes a display control screen arranged on the upper part of the frame, and an electric control and control valve arranged at the rear end of the frame. It is characterized in that a universal mounting bracket for nozzles is arranged on the cleaning tank, and the nozzles are fixed on the universal mounting bracket through the cleaning mounting bracket. The cleaning pipeline adopts a single barrel circulation, and cyclic cleaning is realized through multiple pumps, filters, conversion valves, cleaning liquid barrels, and cleaning tanks.

[0008] As a further illustration of the above scheme, the specific piping system of the present invention is as follows: a low liquid level control device is arranged in the cleaning liquid barrel, and the low liquid level control device adopts a liquid level sensor to be connected with the control device and the liquid replenishing valve. When the low liquid level is reached, the liquid level sensor provides a signal to the control system, and the control device opens the liquid replenishing valve; a water pump SBA1, a filter, a first pressure reducing valve EVA1, a third pressure reducing valve EVA3, and a fourth pressure reducing valve EVA41 are arranged in the liquid inlet cleaning pipeline in the cleaning liquid barrel, and the liquid enters the cleaning mold and the cleaning tank through the nozzle infusion pipe. The cleaning tank is also connected to a reflux pipeline to the cleaning liquid barrel, and the reflux pipeline is connected to the water pump SBA2, the third pressure reducing valve EVA3, and the fourth pressure reducing valve EVA41. EVA3, the fourth pressure reducing valve EVA41, and the fifth pressure reducing valve EVA42 are then connected to the inlet and outlet pipes of the nozzle, wherein the fourth pressure reducing valve EVA41 and the fifth pressure reducing valve EVA42 are installed and connected side by side, and the cleaning tank is connected to the reflux pipe between the water pump SBA2 and the third pressure reducing valve EVA3 via the second pressure reducing valve EVA2, and on the other hand, the second pressure reducing valve EVA2 is also connected to the liquid inlet cleaning pipe through the first pressure reducing valve EVA1, and a pressurized electrical pipe is also connected to the filter in the liquid inlet cleaning pipe, and a one-way valve, an energized solenoid valve, an electrical proportional valve IVA, a pressure gauge, and a filter with pressure reduction are arranged on the pressurized electrical pipe, and the filter is also connected to the control display screen PDA4.

[0009] Furthermore, the universal mounting bracket for the inkjet printing cleaning machine nozzle includes longitudinal frames arranged on both sides of the cleaning tank and two transverse frames fixed between the two longitudinal frames. The inkjet printing nozzle is fixedly installed between the two transverse frames, and at least one transverse frame is adjustably fixedly connected between the longitudinal frames. The adjustably fixedly connected transverse frame adopts a strip groove set at the relative position of the two longitudinal frames, and the transverse frame is fixed on the strip groove by fastening screws.

[0010] Furthermore, the adjustable fixed connection between the transverse frame and the longitudinal frame is that mounting holes are set according to the specifications of various inkjet printing heads of various models, threaded holes are set at the relative positions of the connections between the transverse frame and the longitudinal frame, and the fastening screws are fixed in the threaded holes by passing through the mounting holes; or, the adjustable fixed connection between the transverse frame and the longitudinal frame is that the two ends of the transverse frame are U-shaped clamps facing the direction of the longitudinal frame, and the U-shaped clamps movably clamp the longitudinal frame; the upper clamping surface of the U-shaped clamp has screw holes, and screws are fixed in the screw holes, and the U-shaped clamps are fastened to the longitudinal frame by the screws.

[0011] Furthermore, the inkjet printing head cleaning mounting bracket includes a base arranged at the bottom of the inkjet printing head and a sealing ring arranged between the inkjet printing head and the base, a cleaning chamber is arranged on the base at a position corresponding to the inkjet printing head, and it also includes a rear pressure plate, which is arranged on the upper part of the inkjet printing head or buckled on the lower end platform of the inkjet printing head, the rear pressure plate is provided with a mounting hole, and the base is provided with a screw hole corresponding to the position of the mounting hole, and the inkjet printing head is fixed between the rear pressure plate and the base by screws.

[0012] Furthermore, an external pipe hole of the cleaning cavity is opened on the side of the base.

[0013] When the rear pressure plate is arranged on the upper part of the inkjet print head, a step is arranged on the upper end surface of the cleaning groove of the base, and a sealing ring is arranged on the step; the rear pressure plate has two pairs of mounting holes, which are respectively arranged on both sides of the rear pressure plate, and the middle of the rear pressure plate is a data line passing hole, and one end surface is also provided with an avoidance groove for a double access pipe.

[0014] Furthermore, when the rear pressure plate is buckled on the platform at the lower end of the inkjet printing nozzle, a step is provided on the upper end surface of the cleaning chamber of the base, a sealing ring is provided on the step, and a convex rib is provided on the inner edge of the step; a convex rib corresponding to the convex rib is provided on the inner circle of the sealing ring to form a better seal with the step; the rear pressure plate has four mounting holes, which are respectively provided at the four corner edges of the rear pressure plate, and the middle of the rear pressure plate is a hole through which the inkjet printing nozzle body passes.

[0015] The beneficial effects that can be achieved by the present invention using the above technical solution are:

[0016] The present invention adopts a single-barrel circulation, water pump water pumping, and steering valve multi-directional cleaning method. It does not need the air pressure pressurized water in the barrel in the prior art. The structure is simpler and the failure rate is low. At the same time, the present invention has multiple cleaning methods and better cleaning effects.

[0017] The present invention adopts a universal inkjet printing nozzle installation and fixing frame, so that the present invention can be applicable to the cleaning of various types of inkjet printing nozzles and has better versatility.

[0018] The present invention adopts the combination of the inkjet printing nozzle installation fixing frame and the universal frame, which can quickly realize the installation and removal of the inkjet printing nozzle and has a good sealing effect.

[0019] The structure of the rear pressure plate can quickly install the inkjet printing nozzle on the base, and the sealing ring is set on the step.

[0020] The present invention can realize a variety of switch combination cleaning methods by arranging an external pipe hole of the cleaning tank and combining the double access pipes with the three pipes of the external pipe hole, and the cleaning effect is good.

[0021] The invention has the advantages of simple structure, low cost and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the frame structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the piping system principle of the present invention.

[0024] Figure 3 It is a schematic diagram of the specific direction of the pipeline system of the present invention.

[0025] Figure 4 This is a schematic diagram of the structure of the nozzle installation positioning frame of the present invention.

[0026] Figure 5 It is a schematic diagram of the fixed installation structure of the nozzle mounting frame of the present invention.

[0027] Figure 6 This is a schematic diagram of the structure of an inkjet printing nozzle mounting frame of the present invention.

[0028] Figure 7 For the present invention Figure 6 Schematic diagram of the exploded structure of the inkjet printing head mounting frame.

[0029] Figure 8 This is a schematic diagram of the structure of another inkjet printing head mounting bracket of the present invention.

[0030] Fig. 9 For the present invention Figure 8 Schematic diagram of the exploded structure of the inkjet printing head mounting frame.

[0031] Fig.10 For the present invention Figure 8 Schematic diagram of the exploded structure of the mounting frame without the inkjet print head.

[0032] Fig.11 For the present invention Figure 8 Schematic diagram of the transverse cross-sectional structure of the base of the mounting frame.

[0033] Description of reference numerals:

[0034] 1. Frame 2. Placement slot 3. Cleaning slot 4. Display control screen 5. Universal mounting bracket for printhead 51. Longitudinal frame 511. Bar slot 52. Horizontal frame 521. Threaded hole 54. Fastening screw 541. Rotating handle 542. Retaining ring 55. Inkjet print head 6. Printhead cleaning mounting bracket 61. Screw 62. Rear pressure plate 64. Base 641. Cleaning chamber 642. Step 643. External pipe hole C65. Sealing ring. Double access pipes A and B. DETAILED DESCRIPTION

[0035] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, "at least" means one or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise specified and limited, the terms "assemble", "connect", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the invention, unless otherwise specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “below”, and “above” a second feature includes that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “above”, “below”, and “below” a second feature includes that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] like Figure 1 , Figure 2 As shown, the inkjet printing nozzle cleaning machine of the present invention comprises a frame 1 and a cleaning tank 3 installed on the frame, and a cleaning pipeline connected to the cleaning tank 3. The cleaning tank arranged at the front end of the frame 1 has four grids, which are divided into the front two grids and the rear two grids. The front two grids of the cleaning tank are used for temporarily placing or replacing nozzles and the like, and are placement tanks 2. The cleaning tanks 3 of the rear two grids are provided with a nozzle universal mounting bracket 5. The cleaning tanks 3 of the rear two grids are also connected with an ultrasonic cleaning device. The upper rear end of the frame 1 is higher than the plane of the cleaning tank 3, and a display control screen 4 is arranged on the upper part thereof. The cleaning pipeline passes through the back plate higher than the plane of the cleaning tank 3. The frame 1 below the cleaning tank 3 is a position for storing a cleaning liquid barrel, and the rear end of the frame 1 is an installation position for an electric control and a control valve; as shown Figure 2 The present invention is an improvement on the CN201380003762.0 reference document, which cancels the pneumatic pressure to push the liquid and uses a pump to pump the liquid. Figure 2 It can be seen that the present invention adopts a single barrel circulation, and circulates and flushes it through a pump, a filter, a conversion valve, etc. The cleaning liquid barrel is at normal pressure and does not need to be driven by pressure, so the failure rate is greatly reduced.

[0040] like Figure 3As shown in the specific pipeline flow chart of the present invention, two sets of cleaning systems are used, which can improve efficiency. A low liquid level control device, such as a liquid level sensor, is provided in the cleaning liquid barrel. When the low liquid level is reached, the liquid level sensor provides a signal to the control system, and the control system opens the refilling valve to replenish the cleaning liquid barrel. The water pump SBA1, the filter, the first pressure reducing valve EVA1, the third pressure reducing valve EVA3, and the fourth pressure reducing valve EVA41 in the liquid inlet cleaning pipeline in the cleaning liquid barrel are connected to the nozzle through the nozzle infusion pipe to enter the cleaning mold and the cleaning tank. The cleaning tank is also connected to a reflux pipeline to the cleaning liquid barrel, and the reflux pipeline is connected to the water pump SBA2, the third pressure reducing valve EVA 3. The fourth pressure reducing valve EVA41 and the fifth pressure reducing valve EVA42 are connected to the inlet and outlet pipelines of the nozzle, wherein the fourth pressure reducing valve EVA41 and the fifth pressure reducing valve EVA42 are installed and connected side by side, and the cleaning tank is connected to the return pipeline between the water pump SBA2 and the third pressure reducing valve EVA3 through the second pressure reducing valve EVA2. On the other hand, the second pressure reducing valve EVA2 is also connected to the liquid inlet cleaning pipeline through the first pressure reducing valve EVA1. The filter in the liquid inlet cleaning pipe is also connected to a pressurized electrical pipeline, which has a one-way valve, an energized solenoid valve, an electrical proportional valve IVA, a pressure gauge, and a filter with pressure reduction. The filter is also connected to the control display screen PDA4. In the pipe of the present invention, seven cleaning methods can be realized by closing or switching the water outlets of the nozzle and the cleaning tank, thereby cleaning the nozzle more effectively.

[0041] Reference Figure 4 , Figure 5 As shown, an embodiment of the universal mounting bracket 5 for inkjet printing cleaning machine nozzles arranged in the cleaning tank 3 of the cleaning machine of the present invention comprises a longitudinal frame 51 arranged on both sides of the cleaning tank 3 and two transverse frames 52 fixed between the two longitudinal frames. The inkjet printing nozzle 55 is fixedly installed between the two transverse frames through the nozzle cleaning mounting frame 6. At least one transverse frame 52 is adjustably fixedly connected between the longitudinal frames 51. The adjustably fixedly connected transverse frame 2 adopts a strip groove 511 arranged at the relative position of the two longitudinal frames 51. The transverse frame 52 is fixed on the strip groove 511 by a fastening screw 54. In this embodiment, the strip groove 511 is arranged at the connection between the two transverse frames 52 and the longitudinal frame 51, that is, the two transverse frames 52 and the longitudinal frame 51 are both adjustably fixedly connected, so that the adjustment spacing between the two transverse frames 52 is larger. The specific structure is that the relative position of the connection between the horizontal frame 52 and the vertical frame 51 is provided with a threaded hole 521, and the fastening screw 54 is fixed in the threaded hole 521 by passing through the strip groove 511. There is a retaining ring 542 on the fastening screw 54 on the upper part of the vertical frame 51, and the top of the fastening screw 52 is provided with a rotating handle 541. There are more than one strip grooves 511, and they are arranged at intervals, which can increase the strength. Multiple inkjet printing nozzles 55 can be arranged side by side between the horizontal frames 52, so that one slot can clean multiple nozzles.

[0042] As another embodiment of the universal mounting bracket 5 for the nozzle of an inkjet printing cleaning machine, compared with the previous embodiment, the present invention can also adopt a situation where only one horizontal frame 2 can be moved and adjusted, instead of both horizontal frames 2 being adjustable. Compared with the previous embodiment, the adjustment interval of this embodiment is smaller.

[0043] The universal mounting bracket 5 for the nozzle of the inkjet printing cleaning machine of the present invention can also adopt other embodiments, such as the adjustable fixed connection between the transverse frame 2 and the longitudinal frame 1 is that mounting holes (not shown) are provided corresponding to the sizes of various inkjet printing nozzles 55 of various models, and threaded holes are provided at the relative positions of the connection between the transverse frame and the longitudinal frame, and the fastening screws are fixed in the threaded holes by passing through the mounting holes; or, the adjustable fixed connection between the transverse frame and the longitudinal frame is that the two ends of the transverse frame 2 are U-shaped clamps facing the direction of the longitudinal frame 1, the U-shaped clamps movably clamp the longitudinal frame 1, and the upper clamping surface of the U-shaped clamp has screw holes, and screws 4 are fixed in the screw holes, and the U-shaped clamps are fastened to the longitudinal frame by the screws 4.

[0044] Reference Figure 6 , Figure 7 As shown, it is an embodiment of the inkjet printing nozzle cleaning mounting frame 6 of the present invention, comprising a base 64 arranged at the bottom of the inkjet printing nozzle, a rear pressure plate 62 arranged on the upper part of the inkjet printing nozzle 53, and a sealing ring 65 arranged between the inkjet printing nozzle 55 and the base 64. A cleaning chamber 641 is arranged on the base 64 at a position corresponding to the inkjet printing nozzle 55. The cleaning groove 641 is in a long strip shape. The side of the base 64 is provided with an external pipe hole 643 (C) of the cleaning chamber 641. The upper end surface of the cleaning chamber 641 of the base is provided with a step 642, and the sealing ring 65 is arranged on the step. In this embodiment, the rear pressure plate 62 is provided with mounting holes, and the mounting holes are two pairs, which are arranged on both sides of the rear pressure plate 2. The middle of the rear pressure plate 62 is a data line through hole, and one end surface thereof is also provided with a avoidance groove for double access pipes A and B. The base 64 is provided with a screw hole corresponding to the position of the mounting hole, and the inkjet printing nozzle 3 is fixed between the rear pressure plate 62 and the base 64 by a screw 61.

[0045] Reference Figure 8-Figure 11As shown, it is another embodiment of the inkjet printing nozzle cleaning mounting frame 6 of the present invention, comprising a base 64 arranged at the bottom of the inkjet printing nozzle, a rear pressure plate 62 and a sealing ring 65 arranged between the inkjet printing nozzle 55 and the base 64. A cleaning chamber 641 is arranged at a position corresponding to the inkjet printing nozzle 55 on the base 64. The cleaning chamber 641 is in a long strip shape. The side of the base 64 is provided with an external pipe hole 643 (C) of the cleaning chamber. A step 642 is arranged on the upper end surface of the cleaning chamber 641 of the base. The sealing ring 65 is arranged on the step 642. The inner edge of the step 642 is provided with a convex rib 644. The rear pressure plate 62 is buckled on the lower end platform of the inkjet printing nozzle. The rear pressure plate 62 is provided with mounting holes. There are four mounting holes, which are respectively arranged at the four corner edges of the rear pressure plate 62. The middle of the rear pressure plate 62 is a through hole for the inkjet printing nozzle body. The base 64 is provided with screw holes corresponding to the positions of the mounting holes. The inkjet printing nozzle is buckled and fixed on the base 64 by screws 61. In this embodiment, the inner ring of the sealing ring 65 is provided with convex ribs corresponding to the convex ribs, so as to form a better seal with the step.

[0046] During use, the external pipe hole C of the present invention and the double access pipes A and B respectively provided at both ends of the inkjet printing nozzle can realize multiple combinations of switches for cleaning, such as closing C and cleaning through the inlet and outlet of A and B, closing A and cleaning through the inlet and outlet of B and C, or opening one inlet and outputting through the other two inlets, thereby realizing 7 cleaning methods. Thus, the cleaning of the inkjet printing nozzle 3 is more thorough and the effect is better.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An inkjet printing head cleaning machine, comprising a frame (1) and a cleaning tank (3) mounted on the frame (1), a cleaning pipeline connected to the cleaning tank (3), and a control device, wherein a placement tank (2) is arranged at the front end of the cleaning tank arranged at the front end of the frame (1), a cleaning liquid barrel is arranged below the frame (1), and an ultrasonic heating cleaning device is also connected to the cleaning tank (3), the control device comprises a display control screen (4) arranged on the upper part of the frame (1), and an electric control and control valve arranged at the rear end of the frame (1), characterized in that: The cleaning tank (3) is provided with a nozzle universal mounting bracket (5), the nozzle (55) is fixed to the universal mounting bracket (5) via a cleaning mounting bracket (6), the cleaning pipeline adopts a single barrel circulation, and cyclic cleaning is achieved through multiple pumps, filters, conversion valves, cleaning liquid barrels, and the cleaning tank (3); The nozzle universal mounting bracket (5) comprises a longitudinal frame (51) arranged on both sides of the cleaning tank (3) and two transverse frames (52) fixed between the two longitudinal frames (51); the inkjet printing nozzle is fixedly mounted between the two transverse frames (52); at least one transverse frame (52) is adjustably fixedly connected between the longitudinal frames (51); the adjustably fixedly connected transverse frames (52) are provided with strip grooves (511) at positions opposite to the two longitudinal frames (51); the transverse frames are fixed to the strip grooves (511) by fastening screws; The adjustable fixed connection between the transverse frame (52) and the longitudinal frame (51) is a mounting hole corresponding to the size of various inkjet printing nozzles of different models, and a threaded hole is provided at a relative position of the connection between the transverse frame (52) and the longitudinal frame (51), and a fastening screw is fixed in the threaded hole by passing through the mounting hole; Alternatively, the adjustable fixed connection between the transverse frame (52) and the longitudinal frame (51) is that the two ends of the transverse frame (52) are U-shaped clamps facing the longitudinal frame (51), and the U-shaped clamps movably clamp the longitudinal frame (51); the upper clamping surface of the U-shaped clamp has a screw hole, and a screw is fixed in the screw hole, and is fastened to the longitudinal frame (51) by the screw; The cleaning mounting frame (6) comprises a base (64) arranged at the bottom of the inkjet printing nozzle and a sealing ring arranged between the inkjet printing nozzle and the base, a cleaning chamber (641) is arranged on the base (64) at a position corresponding to the inkjet printing nozzle (55), and the cleaning mounting frame (6) further comprises a rear pressing plate (62), the rear pressing plate (62) is arranged on the upper part of the inkjet printing nozzle (55) or buckled on the platform at the lower end of the inkjet printing nozzle, the rear pressing plate (62) is provided with a mounting hole, and the base (64) is provided with a screw hole corresponding to the position of the mounting hole, and the inkjet printing nozzle (55) is fixed between the rear pressing plate (62) and the base (64) by screws; The cleaning liquid barrel is provided with a low liquid level control device, which uses a liquid level sensor to connect with the control device and the liquid replenishing valve. When the low liquid level is reached, the liquid level sensor provides a signal to the control system, and the control device opens the liquid replenishing valve. The first water pump (SBA1), the filter, the first pressure reducing valve (EVA1), the third pressure reducing valve (EVA3), and the fourth pressure reducing valve (EVA41) are provided in the liquid inlet cleaning pipeline in the cleaning liquid barrel. The liquid enters the cleaning mold and the cleaning tank (3) through the nozzle infusion pipe. The cleaning tank (3) is also connected to a return pipeline to the cleaning liquid barrel. The return pipeline is connected to the second water pump (SBA2), the third pressure reducing valve (EVA3), and the fourth pressure reducing valve (EVA41). ), the fifth pressure reducing valve (EVA42), and then connected to the inlet and outlet pipelines of the nozzle, wherein the fourth pressure reducing valve (EVA41) and the fifth pressure reducing valve (EVA42) are installed and connected side by side, and the cleaning tank (3) is connected to the return pipeline between the second water pump (SBA2) and the third pressure reducing valve (EVA3) through the second pressure reducing valve (EVA2). On the other hand, the second pressure reducing valve (EVA2) is also connected to the liquid inlet cleaning pipeline through the first pressure reducing valve (EVA1). A pressurized electrical pipeline is also connected to the filter in the liquid inlet cleaning pipeline. The pressurized electrical pipeline has a one-way valve, an energized solenoid valve, an electrical proportional valve (IVA), a pressure gauge, and a filter with pressure reduction. The filter is also connected to a control display screen (PDA4).

2. The inkjet printing head cleaning machine according to claim 1, characterized in that: The connection between the two transverse frames (52) and the longitudinal frame (51) is provided with a strip groove (511), that is, the two transverse frames (52) and the longitudinal frame are both adjustable and fixedly connected; A threaded hole is provided at a relative position of the connection between the transverse frame (52) and the longitudinal frame (51), a fastening screw is fixed in the threaded hole by passing through the strip groove (511), and a retaining ring (542) is provided on the fastening screw (54) at the upper part of the longitudinal frame (51); The top of the fastening screw (54) is provided with a rotating handle (541); the strip-shaped grooves (511) are provided in a number of intervals.

3. The inkjet printing head cleaning machine according to claim 1, characterized in that: An external pipe hole (643) for the cleaning cavity is formed on the side of the base (64).

4. The inkjet printing head cleaning machine according to claim 1 or 3, characterized in that: When the rear pressure plate (62) is arranged on the upper part of the inkjet printing nozzle (55), a step (642) is arranged on the upper end surface of the cleaning chamber (641) of the base (64), and the sealing ring (65) is arranged on the step (642); The rear pressure plate (62) has two pairs of mounting holes, which are respectively arranged on two sides of the rear pressure plate (62). The middle of the rear pressure plate (62) is a data line passing hole, and one end surface thereof is also provided with an avoidance groove for a double access pipe.

5. The inkjet printing nozzle cleaning machine according to claim 1 or 3, characterized in that: When the rear pressure plate (62) is buckled onto the platform at the lower end of the inkjet print head (55), a step (642) is provided on the upper end surface of the cleaning chamber (641) of the base (64), and a sealing ring (65) is provided on the step (642). The inner edge of the step (642) is provided with a convex rib; the inner ring of the sealing ring (65) is provided with a convex rib corresponding to the convex rib, so that a better seal is formed between the sealing ring (65) and the step.

6. The inkjet printing head cleaning machine according to claim 5, characterized in that: The rear pressing plate (62) has four mounting holes, which are respectively arranged at the four corner edges of the rear pressing plate (62); the middle of the rear pressing plate (62) is a hole for the inkjet printing nozzle body to pass through.

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