Intelligent closed ink doctor blade device

Abstract

The application relates to a smart closed ink doctor device, belonging to the technical field of printing machinery, which comprises a doctor seat, the top and bottom of the doctor seat are respectively matched with a doctor, the doctor seat is provided with a containing cavity, the two ends of the doctor seat are respectively provided with arc-shaped grooves used for abutting with the roller surface of a printing roller, the arc-shaped grooves and the containing cavity are in communication with each other, when the printing roller and the doctor seat are matched, a sealed filling cavity is formed, the doctor seat is further provided with a circulation port and an in-out material port, the circulation port and the in-out material port are in communication with the filling cavity, the application further comprises an expansion assembly, the expansion assembly comprises an expansion spring and an expansion block, an expansion slot hole is formed in the inner wall of the doctor seat, the expansion slot hole is in communication with the filling cavity, the expansion block is sealingly arranged in the expansion slot hole in a sliding mode, the expansion spring is arranged in the expansion slot hole, and the expansion spring is connected with the expansion block and the doctor seat respectively.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of printing machinery, and particularly relates to a scraper device for intelligently sealing ink. BACKGROUND

[0002] The existing scraper device and the printing roller jointly enclose a sealed filling cavity. During operation, ink glue is first pressurized and injected into the cavity, and after the cavity is filled, the printing roller is driven to rotate, so that the ink is uniformly coated on the roller surface. Then the scraper provided in the scraper device is arranged to implement quantitative ink scraping on the roller surface in a constant geometric relationship, only leaving a uniform ink layer of a predetermined thickness to ensure clear text and consistent color. In order to ensure stable transfer of the ink layer, it is necessary to maintain a continuous and stable positive pressure of the ink in the cavity on the surface of the printing roller.

[0003] However, during continuous operation, mechanical shear and friction heat continuously accumulate, causing the temperature of the ink in the cavity to gradually rise, forming a significant temperature gradient: the newly injected low-temperature ink coexists with the ink in the cavity that has been warmed up, and the viscosity difference expands. Affected by the temperature-viscosity coupling effect, the flow rate of the ink at different height levels is non-uniform, which makes it difficult to achieve dynamic balance of the flow rate of the ink, and the overall volume of the ink in the cavity and the pressure show an increasing trend. When the pressure exceeds the sealing threshold of the lower scraper, the ink leaks from the lower scraper, forming a dripping defect, and causing raw material waste and quality risk, and the volatile ink glue also causes damage to human health. SUMMARY

[0004] In order to solve the problem that the existing scraper device continuously rises in pressure due to the influence of temperature during continuous operation, when the pressure exceeds the sealing threshold of the lower scraper, the ink leaks from the lower scraper, forming a dripping defect, and causing raw material waste and quality risk, and also to avoid the situation that the volatile ink glue causes damage to human health, the present application provides a scraper device for intelligently sealing ink.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] The utility model provides an intelligent closed ink doctor blade device, including the doctor blade seat, the top and bottom of doctor blade seat match with doctor blade respectively, the doctor blade seat is opened with the accommodating cavity, the both ends of doctor blade seat are opened with the arc recess for being combined with the roll surface of printing roller, the arc recess and the accommodating cavity are communicated with each other, when printing roller and doctor blade seat cooperate, form the sealed perfusion cavity together, the doctor blade seat is also opened with the circulation port and the in and out material port, the circulation port and the in and out material port all are communicated with the perfusion cavity, still include expansion assembly, expansion assembly includes expansion spring and expansion block, the inner wall of doctor blade seat is opened with expansion slot hole, expansion slot hole is communicated with the perfusion cavity, expansion block is slidably sealed in expansion slot hole, expansion spring is arranged in expansion slot hole, expansion spring is connected with expansion block and doctor blade seat respectively.

[0007] As a preferred technical scheme of the utility model, the expansion assembly further comprises a stop block and a stop spring, the doctor blade seat is provided with a stop slot hole, the expansion block is provided with a limiting slot hole in communication with the top of the stop slot hole, the stop block is slidably arranged in the stop slot hole, the stop spring is arranged in the stop slot hole, the stop spring is connected with the stop block and the doctor blade seat respectively, and the top of the stop block can lock or release the cooperation relationship with the limiting slot hole.

[0008] As a preferred technical scheme of the utility model, the doctor blade seat is further provided with a communication slot, the side wall of the stop block is provided with a sliding slot, and the expansion assembly further comprises a fixing block arranged in the sliding slot. The fixing block divides the sliding slot into a sliding space and a communication space from top to bottom, the communication slot is in communication with the communication space and the perfusion cavity respectively, and the communication slot is provided with a plurality of corners in sequence communication. When the perfusion cavity reaches a certain oil pressure, the stop block is driven to release the cooperation relationship with the limiting slot hole.

[0009] As a preferred technical scheme of the utility model, the top of the stop block is inclined, and the vertical height of the stop block increases along the contraction direction of the expansion block. The height of the lowest part of the inclined end of the stop block is not higher than the height of the side wall of the bottom of the expansion block.

[0010] As a preferred technical scheme of the utility model, the overall arrangement direction of the communication slot is perpendicular to the direction of the slot opening end surface of the communication slot and the perfusion cavity.

[0011] As a preferred technical scheme of the utility model, the included angle between the two adjacent corners is between 20°-30°.

[0012] As a preferred technical scheme of the present application, the adjusting assembly comprises an adjusting cylinder and an adjusting block, the scraper seat is provided with an adjusting slot hole extending along the axis direction of the expansion slot hole, the adjusting cylinder is arranged in the adjusting slot hole, the adjusting block is in communication with the output end of the adjusting cylinder, and the expansion spring is connected with the adjusting block and the expansion block respectively.

[0013] As a preferred technical scheme of the present application, the limiting slot hole is provided with a plurality of limiting slot holes which are arranged at equal intervals along the axis direction of the scraper seat.

[0014] As a preferred technical scheme of the present application, the rotating assembly is arranged in the adjusting block, the output end of the rotating assembly is connected with the expansion block, and the expansion block is controlled to rotate.

[0015] The expansion block is further provided with an arc-shaped slot, the arc-shaped slot is in communication with the corresponding limiting slot hole, the cross-sectional shape of the arc-shaped slot is an arc-shaped structure, along the rotating direction of the expansion block, the farther the arc-shaped structure is from the central axis of the expansion block, the closer one end of the arc-shaped structure to the central axis of the expansion block is to the limiting slot hole, and the other end of the arc-shaped structure farthest from the central axis of the expansion block is in tangential cooperation with the outer side wall of the expansion block.

[0016] As a preferred technical scheme of the present application, the rotating assembly comprises a rotating motor, a fixed rod and an extension rod, the rotating motor is arranged in the adjusting block, the output end of the rotating motor is coaxially connected with one end of the fixed rod, the other end of the fixed rod is provided with a special-shaped hole, one end of the extension rod is slidingly arranged in the special-shaped hole, and the other end of the extension rod is connected with the expansion block.

[0017] The present application has the following beneficial effects:

[0018] By setting the expansion assembly, when the oil pressure in the perfusion cavity increases, the expansion block will move towards the deep part of the expansion slot hole under the action of the oil pressure. In the process of moving the expansion block, the volume of the perfusion cavity is increased, the pressure in the perfusion cavity is reduced, the leakage of the ink from the lower scraper is avoided, the dripping defect is formed, and the waste of raw materials is caused. The existing scraper device in the continuous operation process, the mechanical shear and friction heat are accumulated, the temperature of the ink in the cavity is gradually increased, a significant temperature gradient is formed: the newly injected low-temperature ink coexists with the ink in the cavity, and the viscosity difference is expanded. Affected by the temperature-viscosity coupling effect, the flow rate of the ink at different heights is inconsistent, which makes it difficult to realize dynamic balance of the flow of the ink, and the total volume of the ink in the cavity and the pressure show an increasing trend. When the pressure exceeds the sealing threshold of the lower scraper, the ink leaks from the lower scraper, forms a dripping defect, and causes waste of raw materials and quality risk. At the same time, the problem that the ink glue dripping to the outside of the equipment will cause damage to human health due to volatilization is also solved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to facilitate those skilled in the art to understand, the present application will be further described below in conjunction with the drawings.

[0020] Figure 1 It is an overall view of the intelligent closed ink scraper device cooperating with the printing roller of the present application.

[0021] Figure 2 It is an overall view of the intelligent closed ink scraper device of the present application.

[0022] Figure 3 It is a front view of the intelligent closed ink scraper device of the present application.

[0023] Figure 4 It is a side sectional view of the scraper seat of the intelligent closed ink scraper device of the present application.

[0024] Figure 5 It is a parts drawing of the expansion assembly of the intelligent closed ink scraper device of the present application.

[0025] Figure 6 It is a parts drawing of the adjustment assembly of the intelligent closed ink scraper device of the present application.

[0026] Figure 7 It is a side sectional view of the expansion block of the intelligent closed ink scraper device of the present application.

[0027] Figure 8 It is an enlarged view of A of the present application. Figure 6

[0028] MAIN SYMBOL EXPLANATION ​

[0029] In the figure: 1, scraper seat; 101, cavity; 102, arc-shaped groove; 103, perfusion cavity; 104, circulation port; 105, in-out port; 106, expansion slot hole; 107, stop slot hole; 108, communication groove; 109, adjustment slot hole; 2, scraper; 3, expansion assembly; 301, expansion spring; 302, expansion block; 3021, limiting slot hole; 3022, arc-shaped slot; 3023, receiving slot hole; 303, stop block; 304, stop spring; 305, fixed block; 306, fit soft block; 4, adjustment assembly; 401, adjustment cylinder; 402, adjustment block; 5, rotating assembly; 501, rotating motor; 502, fixed rod; 5021, special-shaped hole; 503, telescopic rod. DETAILED DESCRIPTION

[0030] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined object of the present application, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0031] Please refer to Figures 1-8The embodiment provides a kind of intelligent closed ink doctor device, including doctor seat 1, the top and bottom of doctor seat 1 are matched with doctor blade 2 respectively, doctor seat 1 is equipped with cavity 101, the two ends of doctor seat 1 are equipped with arc-shaped groove 102 for being bonded with the roll surface of printing roller respectively, arc-shaped groove 102 is interconnected with cavity 101, when printing roller and doctor seat 1 cooperate, form sealed perfusion cavity 103, doctor seat 1 is also equipped with circulation port 104 and inlet and outlet port 105, circulation port 104 and inlet and outlet port 105 are all communicated with perfusion cavity 103, further include expansion assembly 3, expansion assembly 3 includes expansion spring 301 and expansion block 302, the inner wall of doctor seat 1 is equipped with expansion slot hole 106, expansion slot hole 106 is communicated with perfusion cavity 103, expansion block 302 is slidably sealed in expansion slot hole 106, expansion spring 301 is arranged in expansion slot hole 106, expansion spring 301 is connected with expansion block 302 and doctor seat 1 respectively;It needs to be explained that circulation port 104 is provided with two, two circulation ports 104 are communicated with circulation pump arranged outside doctor seat 1, for circulating treatment of ink glue in perfusion cavity 103;Inlet and outlet port 105 is connected with discharging device, for flowing into perfusion cavity 103 from discharging device or flowing out to discharging device from perfusion cavity 103.The expansion assembly 3 is provided, when the oil pressure in perfusion cavity 103 increases, expansion block 302 will move towards the depth of expansion slot hole 106 due to the action of oil pressure, the volume of perfusion cavity 103 is increased in the process of moving of expansion block 302, the pressure in perfusion cavity 103 is reduced, the leakage of ink from lower doctor blade 2 is avoided, the dripping defect is formed, and the waste of raw materials is caused, the continuous operation of existing doctor blade 2 device is solved, the mechanical shear and friction heat are continuously accumulated, the temperature of ink in cavity gradually increases, the significant temperature gradient is formed: the low-temperature ink newly injected coexists with the ink in cavity that has been heated, the viscosity difference is expanded.The flow rate of ink at different height levels presents non-uniformity under the influence of temperature-viscosity coupling effect, which makes it difficult to realize dynamic balance of the flow of ink, the overall volume of ink in cavity and pressure show increasing trend.When the pressure exceeds the sealing threshold of lower doctor blade 2, ink leaks from lower doctor blade 2, dripping defect is formed, and the problems of raw material waste and quality risk are caused;Meanwhile, the problem that the ink glue dripping to the outside of equipment can damage human health due to volatilization is also solved.

[0032] It is worth mentioning that the oil pressure in perfusion cavity 103 leaks through doctor blade 2 when the oil pressure in perfusion cavity 103 reaches leakage pressure, and the initial force of expansion spring 301 on expansion block 302 is less than leakage pressure, which ensures that the oil pressure in perfusion cavity 103 is reduced before reaching leakage pressure.

[0033] In addition, in the technical solution, after the scraper 2 device cooperates with the printing roller to form a closed perfusion cavity 103, the printing roller needs to keep continuous rotating movement. In this process, the ink glue generates continuous high-speed circulation in the cavity due to the rotation of the roller body, and forms high-frequency and periodic dynamic impact load on the expansion block 302 arranged in the perfusion cavity 103. The impact load acts on the expansion spring 301 for a long time, which easily causes fatigue creep of the material, causes attenuation of spring stiffness and response delay, and finally loses normal elastic function.

[0034] Especially crucially, as the oil pressure in the perfusion cavity 103 gradually increases, the fluid kinetic energy and pressure coupling effect are significantly enhanced, and the impact load amplitude is increased; when the force reaches or exceeds the critical sealing pressure of the system, the expansion spring 301 cannot timely compress deformation to reduce the pressure in the perfusion cavity 103 due to the fatigue creep in the early stage. As a result, the ink will break through the sealing interface of the lower scraper 2, seepage and dripping occur, raw material loss is caused, and printing quality defects are induced, forming a systematic quality risk. Based on this, in order to solve this problem, the expansion assembly 3 further includes a stop block 303 and a stop spring 304, the scraper seat 1 is provided with a stop groove hole 107, the expansion block 302 is provided with a limiting groove hole 3021 in communication with the top of the stop groove hole 107, the stop block 303 is slidably arranged in the stop groove hole 107, the stop spring 304 is arranged in the stop groove hole 107, the stop spring 304 is connected with the stop block 303 and the scraper seat 1 respectively, and the top of the stop block 303 can lock or release the cooperation relationship with the limiting groove hole 3021; by arranging the stop block 303, in the initial state, under the action of the stop spring 304, the top of the stop block 303 extends into the limiting groove hole 3021. It should be noted that the sliding direction of the stop block 303 is perpendicular to the sliding direction of the expansion block 302, so when the top of the stop block 303 extends into the limiting groove hole 3021, the stop block 303 will limit the sliding of the expansion block 302, and at the same time, the impact load of the ink glue in the perfusion cavity 103 on the expansion block 302 will be transmitted to the stop block 303, but not to the expansion spring 301, solving the problem that the expansion spring 301 cannot timely compress deformation to reduce the pressure in the perfusion cavity 103 due to the fatigue creep in the early stage.

[0035] Further, in order to ensure that the oil pressure in the perfusion cavity 103 reaches the extent that needs to be relieved, the expansion assembly 3 can work normally, the control stop block 303 needs to release its limiting relationship with the expansion block 302, based on this, the squeegee seat 1 is also provided with a communication groove 108, the side wall of the stop block 303 is provided with a sliding groove, the expansion assembly 3 further includes a fixed block 305, the fixed block 305 is arranged in the sliding groove, the fixed block 305 divides the sliding groove into sliding spaces and communication spaces which are not communicated with each other from top to bottom in sequence, the communication groove 108 is respectively communicated with the communication spaces and the perfusion cavity 103, the communication groove 108 is provided with a plurality of corners which are communicated in sequence, when the oil pressure in the perfusion cavity 103 reaches a certain value, the driving stop block 303 releases its cooperation relationship with the limiting groove hole 3021; by arranging the communication groove 108, the ink and glue in the perfusion cavity 103 will flow into the communication space through the communication groove 108, when the oil pressure in the perfusion cavity 103 is too large, it will cause the volume of the communication space to slide towards the trend of getting larger, and finally cause the stop block 303 to slide towards the bottom of the stop groove hole 107, so that the stop block 303 releases its cooperation relationship with the limiting groove hole 3021, at this time, the expansion block 302 can normally shrink, and the volume of the perfusion cavity 103 is increased to reduce the oil pressure in the perfusion cavity 103. It should be emphasized that when the force of the stop spring 304 on the stop block 303 is greater than the force of the oil pressure in the perfusion cavity 103 on the stop block 303, the stop block 303 will slide towards the top of the stop groove hole 107 again, and the cooperation relationship between the stop block 303 and the limiting groove hole 3021 of the expansion block 302 is re-established. At the same time, it should be noted that in order to prevent the high-frequency impact load of the oil pressure in the perfusion cavity 103 from affecting the stop spring 304, the communication groove 108 is provided with a plurality of corners which are communicated in sequence, when the ink and glue in the perfusion cavity 103 flow through each corner in sequence, the original impact load will be weakened by colliding with the corners, and finally when the ink and glue flow into the communication space, the impact load has been reduced to a degree that cannot cause fatigue creep of the stop spring 304.

[0036] As can be known from the description of the above embodiment, in the initial state, if the stop block 303 is to slide towards the bottom, in addition to overcoming the force of the stop spring 304, the frictional force between the stop block 303 and the expansion block 302 also needs to be overcome. However, it should be noted that the expansion block 302 is directly communicated with the filling cavity 103, while the stop block 303 is communicated with the filling cavity 103 through the communication groove 108, which leads to the fact that the oil pressure load in the filling cavity 103 acting on the stop block 303 is smaller than the oil pressure load in the filling cavity 103 acting on the expansion block 302. In this case, the frictional force of the expansion block 302 on the stop block 303 is too large, so that the stop block 303 cannot slide. Based on this, in order to solve the above problem, the top of the stop block 303 is inclined, and the vertical height of the stop block 303 gradually increases along the contraction direction of the expansion block 302. The height of the lowest part of the inclined end of the stop block 303 is not higher than the height of the bottom side wall of the expansion block 302. Through such a setting, on the one hand, the contact area between the stop block 303 and the expansion block 302 is reduced, so that the stop block 303 can not only limit the sliding of the expansion block 302, but also reduce the frictional force between the stop block 303 and the expansion block 302. On the other hand, the inclined setting of the stop block 303 changes the force direction between the stop block 303 and the expansion block 302, so that the contact force direction between the expansion block 302 and the stop block 303 changes from parallel to the axis direction of the expansion slot hole 106 to inclined downward relative to the axis direction of the expansion slot hole 106, further reducing the frictional force between the stop block 303 and the expansion block 302, and ensuring the smooth operation of the device.

[0037] Further, it needs to be explained that, in the actual work process, in order to ensure that the pressure in the perfusion cavity 103 reaches a specified degree, the expansion block 302 can smoothly shrink to realize the expansion treatment of the perfusion cavity 103, it is necessary to ensure that the pressure in the perfusion cavity 103 reaches a specified degree, and the stop block 303 will be lowered to a specified degree, that is, the highest height of the stop block 303 is lower than the lowest height of the expansion block 302, so as to realize the normal shrinkage treatment of the expansion block 302; however, since the pressure in the perfusion cavity 103 is gradual, before the pressure in the perfusion cavity 103 reaches a specified degree, the stop block 303 will first move a small distance towards the bottom, and since the top of the stop block 303 is inclined, when the stop block 303 moves, it will cause the expansion block 302 to disengage from the abutting relationship with the stop block 303, so that the expansion block 302 will always be subjected to high-frequency impact load from the perfusion cavity 103 before the pressure in the perfusion cavity 103 reaches a specified degree, which will also cause the expansion spring 301 to be material fatigue; based on this, in order to solve this problem, the expansion assembly 3 of the present scheme also includes an abutting soft block 306, which is arranged on the inclined end of the top of the stop block 303, and the abutting soft block 306 and the expansion block 302 realize an abutting relationship; through such a setting, when the stop block 303 and the expansion block 302 are in normal cooperation, the abutting soft block 306 will also be located in the limiting groove hole 3021, and the abutting soft block 306 and the side wall of the limiting groove hole 3021 are in abutting relationship, which increases the friction force between the stop block 303 and the expansion block 302, and ensures that the stop block 303 can still keep the abutting relationship with the expansion block 302 through the abutting soft block 306 before the perfusion cavity 103 reaches a specified pressure, and the high-frequency impact load received by the expansion block 302 during this period will be transmitted to the stop block 303 through the abutting soft block 306, eliminating the influence of the high-frequency impact load on the expansion spring 301. Further, when the pressure in the perfusion cavity 103 reaches a specified degree, it is necessary to ensure that the stop block 303 disengages from the abutting relationship with the expansion block 302, based on this, the expansion block 302 of the present scheme is provided with a plurality of receiving groove holes 3023, the plurality of receiving groove holes 3023 correspondingly match with the plurality of limiting groove holes 3021, and any receiving groove hole 3023 is arranged on the bottom side of the corresponding limiting groove hole 3021, when the pressure in the perfusion cavity 103 reaches a specified degree, the abutting soft block 306 will be received in the receiving groove hole 3023 by deforming, thereby realizing that the stop block 303 disengages from the abutting relationship with the expansion block 302, and the expansion block 302 can smoothly shrink.

[0038] It needs to be explained that the area of the communication port between the receiving groove hole 3023 and the limiting groove hole 3021 is smaller than the area of the abutting soft block 306 abutting on the limiting groove hole 3021.

[0039] Further, in order to weaken the impact load of the ink glue on the stop spring 304, the overall trend of the communication groove 108 is arranged vertically to the slot end face, and a plurality of 20°-30° small corners are arranged in the groove body: the orthogonal inlet forces the high-speed fluid to generate a 90° flow direction mutation at the slot, inducing local vortex and turbulence, and dissipating part of the kinetic energy in advance; then, under the premise of not causing obvious flow separation, the small-angle corner converts the remaining macro kinetic energy into viscous dissipation heat through multiple reflections of compression-expansion waves, repeated separation and reattachment of boundary layers, and realizes "multi-stage buffering". The angle interval takes into account the energy dissipation efficiency and flow resistance, which avoids the additional pressure pulsation caused by too large corner, and prevents insufficient energy dissipation caused by too small corner; at the same time, the continuous small corner breaks the characteristic length of the straight groove body, suppresses the formation of standing waves, eliminates the resonance amplification caused by the coupling of impact frequency and structure mode, and finally significantly reduces the dynamic load acting on the stop spring 304, prolongs the fatigue life of the stop spring 304, and ensures the working reliability of the stop spring 304.

[0040] In addition, when the expansion block 302 moves due to the surge of oil pressure in the infusion cavity 103, the oil pressure in the infusion cavity 103 will return to normal, at this time the stop block 303 needs to be restored to the original position, and the expansion block 302 needs to be relocked with the stop block 303 after sliding, based on this, the limiting groove 3021 is provided with a plurality of limiting grooves 3021, and the limiting grooves 3021 are arranged at equal intervals along the axis direction of the scraper seat 1.

[0041] As can be known from the description of the above embodiment, when the expansion block 302 slides to a new position and re-locks with the stop block 303, the oil pressure in the perfusion cavity 103 is restored to normal; however, as the squeegee 2 device continues to operate, the oil pressure in the perfusion cavity 103 will rise again. At this time, the expansion spring 301 has already been compressed once, so the oil pressure in the perfusion cavity 103 needs to rise to a higher oil pressure than before to continue to drive the expansion block 302 to slide. This situation will also cause the oil pressure in the perfusion cavity 103 to leak through the squeegee 2, resulting in a dripping defect. In order to solve the above problems, the present scheme further comprises an adjusting assembly 4, which comprises an adjusting cylinder 401 and an adjusting block 402. The squeegee seat 1 extends along the axis direction of the expansion slot hole 106 and is provided with an adjusting slot hole 109, which is in communication with the expansion slot hole 106. The adjusting cylinder 401 is arranged in the adjusting slot hole 109, and the adjusting block 402 is in communication with the output end of the adjusting cylinder 401. The expansion spring 301 is connected with the adjusting block 402 and the expansion block 302, respectively. By arranging the adjusting cylinder 401, when the expansion block 302 slides to a new position and re-locks with the stop block 303, the adjusting cylinder 401 will start to work, drive the adjusting block 402 to move, and re-adjust the distance between the adjusting block 402 and the expansion block 302, so as to restore the deformation degree of the expansion spring 301.

[0042] Further, when the device completes the ink scraping process on the printing roller, the expansion assembly 3 needs to return to the original position to prepare for the next ink scraping process, but due to the restriction of the stop block 303 on the expansion block 302, the expansion block 302 cannot smoothly reset; based on this, in order to solve this problem, the present scheme also includes a rotating assembly 5, which is arranged in the adjusting block 402, and the output end of the rotating assembly 5 is connected with the expansion block 302 to control the rotation of the expansion block 302; at the same time, the expansion block 302 is also provided with an arc-shaped groove 3022, and a plurality of arc-shaped grooves 3022 are arranged, and the plurality of arc-shaped grooves 3022 are correspondingly matched with the plurality of limiting groove holes 3021, any arc-shaped groove 3022 is communicated with the corresponding limiting groove hole 3021, the cross-sectional shape of the arc-shaped groove 3022 is an arc structure, along the rotation direction of the expansion block 302, the farther the arc structure is from the center axis of the expansion block 302, the closer the end of the arc structure is to the limiting groove hole 3021, and the end point position of the arc structure closest to the center axis of the expansion block 302 is located in the limiting groove hole 3021, and the end of the arc structure farthest from the center axis of the expansion block 302 is tangent to the outer side wall of the expansion block 302, and the end point position of the arc structure farthest from the center axis of the expansion block 302 is located on the outer side wall of the expansion block 302, through such arrangement, when the rotating assembly 5 controls the expansion block 302 to rotate, the top of the stop block 303 is transformed from being located in the limiting groove hole 3021 of the expansion block 302 to being located in the arc-shaped groove 3022, and with the rotation of the expansion block 302, the stop block 303 moves from the one end of the arc-shaped groove 3022 close to the limiting groove hole 3021 to the one end of the arc-shaped groove 3022 close to the outer side wall of the expansion block 302, and finally realizes the abutment of the stop block 303 and the outer side wall of the expansion block 302, and realizes the expansion block 302 through rotation to remove the abutting restriction relationship with the stop block 303.

[0043] Specifically, the rotating assembly 5 includes a rotating motor 501, a fixed rod 502 and a telescopic rod 503, the rotating motor 501 is arranged in the adjusting block 402, the output end of the rotating motor 501 extends out and is coaxially connected with one end of the fixed rod 502, the other end of the fixed rod 502 is provided with a special-shaped hole 5021, one end of the telescopic rod 503 is slidingly arranged in the special-shaped hole 5021, the cross-sectional shape of the telescopic rod 503 is the same as that of the special-shaped hole 5021, and the other end of the telescopic rod 503 is connected with the expansion block 302; through such arrangement, when the rotating motor 501 starts to work, it can drive the fixed rod 502 to rotate, and also drive the telescopic rod 503 to rotate, and finally drive the expansion block 302 to rotate; and since the telescopic rod 503 is slidingly arranged at one end of the fixed rod 502, it does not hinder the change of the distance between the adjusting block 402 and the expansion block 302.

[0044] It is worth mentioning that the expansion spring 301 in the scheme is arranged in the fixed rod 502, and the two ends of the expansion spring 301 are connected with the telescopic rod 503 and the fixed rod 502 respectively.

[0045] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical scheme of the present application. Any modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application, without departing from the technical scheme of the present application, still belongs to the scope of the technical scheme of the present application.

Claims

1. A smart sealing ink scraper device, comprising a scraper seat, wherein a scraper is respectively matched at the top and bottom of the scraper seat, the scraper seat has a cavity, and arc-shaped grooves for contacting the roller surface of a printing roller are respectively formed at both ends of the scraper seat, the arc-shaped grooves communicating with the cavity, and the printing roller and the scraper seat forming a sealed filling cavity together when they cooperate, the scraper seat also having a circulation port and an inlet / outlet port, both of which are communicating with the filling cavity, characterized in that: It also includes a capacity expansion assembly, which includes a capacity expansion spring and a capacity expansion block. The inner wall of the scraper seat is provided with a capacity expansion slot, which is connected to the infusion chamber. The capacity expansion block is slidably and sealed in the capacity expansion slot, and the capacity expansion spring is disposed in the capacity expansion slot. The capacity expansion spring is connected to the capacity expansion block and the scraper seat respectively. The expansion assembly also includes a stop block and a stop spring. The scraper seat has a stop slot, and the expansion block has a limiting slot that communicates with the top of the stop slot. The stop block is slidably disposed in the stop slot, and the stop spring is disposed in the stop slot. The stop spring is connected to the stop block and the scraper seat respectively. The top of the stop block can lock or release its engagement with the limiting slot. The scraper seat is also provided with a connecting groove, and the side wall of the stop block is provided with a sliding groove. The expansion assembly also includes a fixing block, which is disposed in the sliding groove. The fixing block divides the sliding groove from top to bottom into non-connected sliding spaces and connected spaces. The connecting groove is connected to the connected spaces and the injection chamber respectively. The connecting groove is provided with several sequentially connected corners. When the injection chamber reaches a certain oil pressure, it drives the stop block to release its engagement with the limiting slot.

2. The intelligent sealing ink doctor blade device according to claim 1, characterized in that: The top of the stop block is inclined, and the vertical height of the stop block gradually increases along the contraction direction of the expansion block. The height of the lowest point of the inclined end of the stop block is not higher than the height of the bottom sidewall of the expansion block.

3. The intelligent sealing ink doctor blade device according to claim 1, characterized in that: The overall orientation of the connecting groove is perpendicular to the direction of the end face of the groove that connects the connecting groove and the injection cavity.

4. The intelligent sealing ink scraper device according to claim 1, characterized in that: The angle between two adjacent corners is between 20° and 30°.

5. The intelligent sealing ink doctor blade device according to claim 1, characterized in that: It also includes an adjustment assembly, which includes an adjustment cylinder and an adjustment block. The scraper seat extends along the axial direction of the expansion slot and has an adjustment slot. The adjustment cylinder is disposed in the adjustment slot. The adjustment block is connected to the output end of the adjustment cylinder. The expansion spring is connected to the adjustment block and the expansion block respectively.

6. The intelligent sealing ink scraper device according to claim 1, characterized in that: The limiting slots are provided in a plurality of manner, and the plurality of limiting slots are arranged at equal intervals along the axial direction of the scraper seat.

7. The intelligent sealing ink doctor blade device according to claim 5, characterized in that: It also includes a rotating component, which is disposed inside the adjusting block. The output end of the rotating component is connected to the expansion block to control the expansion block to rotate. The expansion block also has an arc-shaped groove, which communicates with a corresponding limiting slot. The cross-sectional shape of the arc-shaped groove is an arc structure. Along the rotation direction of the expansion block, the arc structure is farther away from the central axis of the expansion block. The end of the arc structure closest to the central axis of the expansion block is tangentially engaged with the limiting slot, and the end of the arc structure farthest from the central axis of the expansion block is tangentially engaged with the outer wall of the expansion block.

8. The intelligent sealing ink doctor blade device according to claim 7, characterized in that: The rotating assembly includes a rotating motor, a fixed rod, and a telescopic rod. The rotating motor is disposed inside the adjusting block. The output end of the rotating motor extends out and is coaxially connected to one end of the fixed rod. The other end of the fixed rod has an irregular hole. One end of the telescopic rod is slidably disposed in the irregular hole, and the other end of the telescopic rod is connected to the expansion block.

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