Screen printing device

Abstract

The utility model discloses a silk-screen printing device. The silk-screen printing device comprises a base, a scraper assembly, a scraper driving assembly, a pressure monitoring mechanism and a control device. The scraper assembly is movably arranged on the base; the scraper driving assembly comprises a first driving structure and a second driving structure; the first driving structure is connected with the second driving structure, and the second driving structure is connected with the scraper assembly; the control device is electrically connected with the pressure monitoring mechanism and the first driving structure, the pressure monitoring mechanism is used for monitoring the pressure value applied to the to-be-printed surface by the scraper assembly in real time, and the control device can control the second driving structure to work according to the pressure value detected by the pressure monitoring mechanism so as to adjust the pressure applied to the scraper assembly. According to the silk-screen printing device, the pressure value at the scraper assembly can be monitored in real time, so that the pressure value applied by the scraper assembly is always in a proper pressure range, automatic adjustment is achieved, more labor is saved, the adjustment precision is higher, and therefore the printing effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a screen printing device. Background Art

[0002] As an important printing technology, screen printing is widely used in various industries. In the screen printing process, the pressure of the scraper is crucial to the printing effect. If the scraper pressure is too high or too low, it will lead to poor printing effect and affect product quality. However, traditional screen printing machines often lack the real-time control and adjustment function of scraper pressure, making it difficult for operators to ensure the consistency and stability of scraper pressure during the printing process.

[0003] At present, the common solution is to control the scraper pressure by manually adjusting the downward pressure depth of the threaded screw. However, this method is not only time-consuming and labor-intensive, but also has low precision. The deformation of the scraper will increase, and the constancy and consistency of the pressure cannot be guaranteed. It is also very demanding on the inspection of the printer. Utility Model Content

[0004] In view of this, the utility model aims to solve the problem that the pressure of the scraper of the traditional screen printing device is difficult to control, and adjusting the scraper pressure by manual adjustment is not only time-consuming and labor-intensive, but also has low precision and increases the deformation of the scraper.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes a screen printing device, comprising:

[0006] Pedestal;

[0007] A scraper assembly, movably disposed on the base;

[0008] A scraper drive assembly is disposed on the base and includes a first drive structure and a second drive structure;

[0009] The first driving structure is connected to the second driving structure, and can drive the second driving structure to move in the up-down direction of the base, and the second driving structure is connected to the scraper assembly;

[0010] A pressure monitoring mechanism and a control device, wherein the control device is electrically connected to the pressure monitoring mechanism and the first driving structure, the pressure monitoring mechanism is used to monitor in real time the pressure value applied by the scraper assembly to the surface to be printed, and the control device can control the operation of the second driving structure according to the pressure value detected by the pressure monitoring mechanism to adjust the pressure applied to the scraper assembly.

[0011] Optionally, the first driving structure includes:

[0012] A lifting electric cylinder is arranged on the base;

[0013] The first connecting plate is connected to the lifting electric cylinder, and the second driving structure is connected to the first connecting plate. The lifting electric cylinder drives the first connecting plate to move along the up and down directions of the base, and drives the second driving structure to move together.

[0014] Optionally, the first driving structure also includes a guide bottom plate and a guide top plate arranged at relative intervals along the up-down direction, a guide column connected between the guide bottom plate and the guide top plate, and a guide sleeve connected to the base, the guide column is movably sleeved in the guide sleeve along the up-down direction of the base, the second driving structure is arranged on the guide bottom plate, and the scraper assembly is connected to the guide bottom plate.

[0015] Optionally, the second driving structure includes a pressure-stabilizing cylinder arranged on the guide base plate, and a proportional valve connected to the pressure-stabilizing cylinder. The control device is electrically connected to the proportional valve. The control device can control the operation of the proportional valve according to the pressure value detected by the pressure monitoring mechanism to adjust the opening and closing degree of the proportional valve and the extension amount of the piston of the pressure-stabilizing cylinder.

[0016] Optionally, the scraper assembly comprises:

[0017] A connecting block connected to the guide base plate;

[0018] A scraper seat, rotatably connected to the connecting block;

[0019] The scraper member is connected to the scraper seat.

[0020] Optionally, the scraper seat is provided with a first connecting portion, and the scraper member is provided with a second connecting portion, and the first connecting portion and the second connecting portion are connected to each other, so that the scraper seat and the scraper member are detachably connected.

[0021] Optionally, the first connecting portion includes:

[0022] A locking member rotatably disposed on the scraper seat, wherein at least a portion of the locking member can extend from the scraper seat;

[0023] An adjusting structure is movably arranged on the scraper seat and connected to the locking member. The adjusting structure can be moved relative to the scraper seat under the action of external force to drive the locking member to rotate, so that the locking member has a locked state in which it is engaged with the second connecting part, and an unlocked state in which it is separated from the second connecting part.

[0024] Optionally, the locking member includes a first rotating shaft, a locking hook fixedly connected to the first rotating shaft, and a transmission plate arranged on the locking hook, the first rotating shaft is rotatably arranged on the scraper seat, and the locking hook can extend from the bottom of the scraper seat;

[0025] The adjustment structure includes an adjustment handle rotatably arranged on the scraper seat, the adjustment handle is provided with a stop portion, the adjustment handle rotates relative to the scraper seat, when the stop portion abuts against the end of the transmission plate, the locking hook is engaged with the second connecting portion to be in the locked state.

[0026] Optionally, the adjustment handle includes a handle portion and a transmission column arranged at one end of the handle portion, the transmission column is rotatably arranged in the scraper seat, the handle portion is located outside the scraper seat, the transmission column is arranged in a cylindrical shape, the stop portion includes a first cutting plane arranged on the outer peripheral side of the transmission column, and the transmission column is also provided with a second cutting plane, and the first cutting plane and the second cutting plane are arranged adjacent to each other;

[0027] When the first cutting plane abuts against the transmission plate, the scraper seat and the scraper member are in the locked state, and when the second cutting plane abuts against the transmission plate, the scraper seat and the scraper member are in the unlocked state.

[0028] Optionally, the cutting depth of the second cutting plane is greater than the cutting depth of the first cutting plane, and when the adjustment handle rotates from the first cutting plane toward the second cutting plane, the locking hook has a tendency to rotate toward a direction of disengaging from the second connecting portion; and / or,

[0029] The second connecting portion comprises a locking shaft provided on the scraper member; and / or,

[0030] The first connection parts and the second connection parts are each provided with two sets, and the two sets of the first connection parts and the two sets of the second connection parts are provided in a one-to-one correspondence.

[0031] The technical solution provided by the utility model has the following beneficial effects:

[0032] The screen printing device provided by the utility model includes a base, a scraper assembly, a scraper driving assembly, a pressure monitoring mechanism and a control device, wherein the scraper assembly is used to contact with a surface to be printed to scrape ink, and the first driving structure of the scraper driving assembly can drive the second driving structure to move, so that the scraper assembly can move in the up and down directions together to adjust the initial position of the scraper assembly so that the scraper assembly can apply a preset pressure on the surface to be printed; further, the pressure value applied by the scraper assembly to the surface to be printed can be monitored in real time by the pressure monitoring mechanism, and when the pressure value measured by the pressure monitoring mechanism is outside the preset pressure threshold, the control device can control the second driving structure to work according to the pressure value of the pressure monitoring mechanism to adjust the pressure applied by the scraper assembly. Therefore, the screen printing device provided by the utility model can monitor the pressure value at the scraper assembly in real time. When the pressure value is too large or too small, the control device can control the second driving structure to work, so as to adjust the distance between the scraper assembly and the surface to be printed, that is, adjust the pressure value applied by the scraper assembly on the surface to be printed, so that the pressure value applied by the scraper assembly is always within the appropriate pressure range. The automatic adjustment is more labor-saving and has higher adjustment accuracy, so that the printing effect is better and the service life of the scraper assembly can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0034] Figure 1 A schematic structural diagram of an embodiment of a screen printing device provided by the utility model;

[0035] Figure 2 for Figure 1 A schematic diagram of the structure of the scraper assembly and the scraper drive assembly;

[0036] Figure 3 for Figure 1 A schematic diagram of the structure of the connection between the scraper seat and the scraper member;

[0037] Figure 4 for Figure 3 A schematic structural diagram of the first connecting portion and the second connecting portion.

[0038] Description of Figure Numbers:

[0039] 100-screen printing device; 1-base; 2-scraper assembly; 21-connecting block; 22-scraper seat; 23-first connecting part; 231-locking member; 2311-first rotating shaft; 2312-locking hook; 2313-transmission plate; 232-adjusting handle; 2321-handle part; 2322-transmission column; 2323-first cutting plane; 2324-second cutting plane; 2325-limiting boss; 24-scraper member; 25-second connecting part; 251-locking shaft; 3-scraper drive assembly; 31-first drive structure; 311-lifting electric cylinder; 312-first connecting plate; 313-guide bottom plate; 314-guide top plate; 315-guide column; 316-guide sleeve; 32-second drive structure; 321-pressure-stabilizing cylinder.

[0040] The realization of the purpose, functional characteristics and excellent effects of the utility model will be further explained below in conjunction with specific embodiments and drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] It should be noted that if a directional indication is involved in the embodiments of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0044] The utility model provides a screen printing device 100, specifically, please refer to Figure 1 to Figure 2 In this embodiment, the screen printing device 100 includes a base 1, a scraper assembly 2, a scraper driving assembly 3, a pressure monitoring mechanism and a control device; the scraper assembly 2 is movably arranged on the base 1; the scraper driving assembly 3 is arranged on the base 1, and includes a first driving structure 31 and a second driving structure 32; the first driving structure 31 is connected to the second driving structure 32, and can drive the second driving structure 32 to move along the up and down directions of the base 1, and the second driving structure 32 is connected to the scraper assembly 2; the control device is electrically connected to the pressure monitoring mechanism and the first driving structure 31, and the pressure monitoring mechanism is used to monitor in real time the pressure value applied by the scraper assembly 2 on the surface to be printed, and the control device can control the second driving structure 32 to work according to the pressure value detected by the pressure monitoring mechanism to adjust the pressure applied to the scraper assembly 2.

[0045] In this embodiment, the scraper assembly 2 is used to contact the surface to be printed to scrape ink, and the first driving structure 31 of the scraper driving assembly 3 can drive the second driving structure 32 to move, so that the scraper assembly 2 can move in the up and down directions to adjust the initial position of the scraper assembly 2 so that the scraper assembly 2 can apply a preset pressure on the surface to be printed; further, the pressure value applied by the scraper assembly to the surface to be printed can be monitored in real time by the pressure monitoring mechanism. When the pressure value measured by the pressure monitoring mechanism is outside the preset pressure threshold, the control device can control the second driving structure 32 to work according to the pressure value of the pressure monitoring mechanism to adjust the pressure applied by the scraper assembly 2. Therefore, the screen printing device 100 provided by the utility model can monitor the pressure value at the scraper assembly 2 in real time. When the pressure value is too large or too small, the control device can control the second driving structure 32 to work, so as to adjust the distance between the scraper assembly 2 and the surface to be printed, that is, adjust the pressure value applied by the scraper assembly 2 on the surface to be printed, so that the pressure value applied by the scraper assembly 2 is always within the appropriate pressure range. The automatic adjustment is more labor-saving and has higher adjustment accuracy, so that the printing effect is better and the service life of the scraper assembly 2 can be extended.

[0046] The shape of the base 1 is not specifically limited. The base 1 can be configured as a flat plate, a bracket, or a part of a printing support table. Figure 1 As shown in , the base 1 also includes a transverse movable frame and a longitudinal movable frame, the longitudinal movable frame is arranged on the transverse movable frame along the longitudinal movement of the base 1, and the scraper drive assembly 3 is arranged on the longitudinal movable frame, so that the scraper assembly 2 can have a movable stroke along the longitudinal and transverse directions of the base 1 to better scrape the ink. Wherein, when the screen printing device 100 is working normally, the transverse direction may refer to the front-to-back direction of the base 1, and the longitudinal direction may refer to the left-right direction of the base 1.

[0047] The first driving structure 31 is mainly used to initially fix the scraper assembly 2 at a certain height, so that when performing different types of printing, the scraper assembly 2 is fixed at a corresponding height, so that the pressure value applied by the scraper assembly 2 on the surface to be printed is within the preset pressure range of the corresponding printed matter. Preferably, the first driving structure 31 includes a lifting electric cylinder 311 and a first connecting plate 312, the lifting electric cylinder 311 is arranged on the base 1, and the lifting electric cylinder 311 can be set as a servo cylinder. By setting the required initial pressure value, the piston extension of the cylinder can be controlled by the servo controller, thereby controlling the scraping position of the scraper assembly 2; the first connecting plate 312 is connected to the lifting electric cylinder 311, and the second driving structure 32 is connected to the first connecting plate 312. The lifting electric cylinder 311 drives the first connecting plate 312 to move along the up and down direction of the base 1, driving the second driving structure 32 to move together. The first connecting plate 312 is driven to move in the up-down direction of the base 1 by the lifting electric cylinder 311 , thereby driving the second driving structure 32 and the scraper assembly 2 to move in the up-down direction of the base 1 .

[0048] Furthermore, combined with Figure 1 and Figure 2 As shown, the first driving structure 31 also includes a guide bottom plate 313 and a guide top plate 314 arranged at relative intervals along the up-down direction, a guide column 315 connected between the guide bottom plate 313 and the guide top plate 314, and a guide sleeve 316 connected to the base 1, the guide column 315 is movably sleeved in the guide sleeve 316 along the up-down direction of the base 1, the second driving structure 32 is arranged on the guide bottom plate 313, and the scraper assembly 2 is connected to the guide bottom plate 313. Preferably, two guide columns 315 are provided, and two guide sleeves 316 are provided in a one-to-one correspondence. The two guide columns 315 are respectively located on both sides of the lifting cylinder 311. When the lifting cylinder 311 drives the first connecting plate 312 to move along the up and down directions of the base 1, the two guide columns 315 can move up and down along the two guide sleeves 316, driving the guide bottom plate 313 to move along the up and down directions of the base 1, thereby making the second driving structure 32 and the scraper assembly 2 move along the up and down directions of the base 1.

[0049] The scraper assembly 2 can be initially fixed at a preset position by the first driving structure 31, so that when printing starts, the pressure value of the scraper assembly 2 is within a normal range. However, after the screen printing device 100 has been working for a period of time, the distance between the scraper assembly 2 and the surface to be printed will change, so that the pressure value applied by the scraper assembly 2 on the surface to be printed will also change. Therefore, the scraper assembly 2 can be further adjusted by the second driving structure 32. Preferably, as Figure 2 As shown in the figure, the second driving structure 32 includes a pressure-stabilizing cylinder 321 disposed on the guide bottom plate 313, and a proportional valve (not shown in the figure) connected to the pressure-stabilizing cylinder 321. The control device is electrically connected to the proportional valve. The control device can control the proportional valve to work according to the pressure value detected by the pressure monitoring mechanism, so as to adjust the opening and closing degree of the proportional valve to adjust the extension amount of the piston of the pressure-stabilizing cylinder 321. By controlling the opening and closing amount of the proportional valve, the air pressure value in the pressure-stabilizing cylinder 321 can be adjusted, and the position of the piston of the pressure-stabilizing cylinder 321 can be adjusted. The piston of the pressure-stabilizing cylinder 321 is telescopically arranged along the up and down direction of the base 1. When the first connecting plate 312 is in a fixed state, the movement of the piston of the pressure-stabilizing cylinder 321 can drive the guide bottom plate 313 to move, and then drive the scraper assembly 2 to move, so as to fine-tune the position of the scraper assembly 2, so that the pressure applied by the scraper assembly 2 on the surface to be printed is more moderate.

[0050] Specifically, when the pressure value detected by the pressure monitoring mechanism is greater than the preset pressure range, the opening and closing degree of the proportional valve can be adjusted by the control device to reduce the opening and closing degree, so that the piston of the pressure-stabilizing cylinder 321 extends less, so that the scraper assembly 2 is farther away from the surface to be printed, so as to reduce the pressure applied by the scraper assembly 2 on the surface to be printed. Similarly, when the pressure value detected by the pressure monitoring mechanism is less than the preset pressure range, the opening and closing degree of the proportional valve can be adjusted by the control device to increase the opening and closing degree, so that the piston of the pressure-stabilizing cylinder 321 extends more, so that the scraper assembly 2 is closer to the surface to be printed, so as to increase the pressure applied by the scraper assembly 2 on the surface to be printed. During the entire operation process of the scraper assembly 2, the scraping pressure of the scraper assembly 2 can be adjusted in real time to ensure that the scraping pressure of the scraper assembly 2 is always within the optimal range, so that the printing effect is better, and the scraper assembly 2 is not easily deformed and has a longer service life.

[0051] Among them, Figure 2As shown in , the scraper assembly 2 includes a connection block 21, a scraper seat 22 and a scraper member 24, wherein the connection block 21 is connected to the guide bottom plate 313; the scraper seat 22 is rotatably connected to the connection block 21; and the scraper member 24 is connected to the scraper seat 22. Thus, the scraper member 24 can move along with the movement of the guide bottom plate 313, and the scraper seat 22 can rotate relative to the connection block 21 to adjust the angle of the scraper member 24 along the front-rear direction, so that the scraping effect of the scraper member 24 is better.

[0052] Furthermore, combined with Figure 2 and Figure 3 As shown, a first connecting portion 23 is provided on the scraper seat 22, and a second connecting portion 25 is provided on the scraper member 24. The first connecting portion 23 and the second connecting portion 25 are connected so that the scraper seat 22 and the scraper member 24 are detachably connected, thereby realizing quick disassembly and assembly of the scraper member 24 and making the assembly operation more convenient.

[0053] Preferably, if Figure 3 As shown in , the first connection part 23 includes a locking member 231 and an adjusting structure. The locking member 231 is rotatably arranged on the scraper seat 22, and at least a part of the locking member 231 can extend from the scraper seat 22; the adjusting structure is movably arranged on the scraper seat 22 and connected to the locking member 231. The adjusting structure can be moved relative to the scraper seat 22 under the action of an external force to drive the locking member 231 to rotate, so that the locking member 231 has a locked state in which it is locked with the second connection part 25, and has an unlocked state in which it is separated from the second connection part 25. When the locking member 231 is in the locked state, the scraper member 24 can be locked and fixed on the scraper seat 22, and when the locking member 231 is in the unlocked state, the scraper member 24 can be removed from the scraper seat 22, so that the scraper member 24 can be quickly disassembled.

[0054] Furthermore, combined with Figure 3 and Figure 4As shown, the locking member 231 includes a first rotating shaft 2311, a locking hook 2312 fixedly connected to the first rotating shaft 2311, and a transmission plate 2313 provided on the locking hook 2312, the first rotating shaft 2311 is rotatably provided on the scraper seat 22, and the locking hook 2312 can extend from the bottom of the scraper seat 22; the adjustment structure includes an adjustment handle 232 rotatably provided on the scraper seat 22, a stop portion is provided on the adjustment handle 232, the adjustment handle 232 rotates relative to the scraper seat 22, and when the stop portion abuts against the end of the transmission plate 2313, the locking hook 2312 is engaged with the second connecting portion 25 to be in the locked state. When installing the scraper member 24, after the scraper member 24 and the scraper seat 22 are installed in place, the adjustment handle 232 is manually rotated so that the stop portion rotates to abut against the transmission plate 2313. Under the action of the stop portion, the transmission plate 2313 can be driven to rotate, driving the locking hook 2312 to rotate and engage with the second connecting portion 25, thereby fixing the scraper member 24 on the scraper seat 22.

[0055] Furthermore, combined with Figure 3 and Figure 4 As shown, the adjustment handle 232 includes a handle portion 2321 and a transmission column 2322 disposed at one end of the handle portion 2321, the transmission column 2322 is rotatably disposed in the scraper seat 22, and the handle portion 2321 is located outside the scraper seat 22, so as to facilitate the operation of the operator. The transmission column 2322 is arranged in a cylindrical shape, the stop portion includes a first cutting plane 2323 disposed on the outer peripheral side of the transmission column 2322, and the transmission column 2322 is also provided with a second cutting plane 2324, and the first cutting plane 2323 and the second cutting plane 2324 are arranged adjacent to each other; when the first cutting plane 2323 abuts against the transmission plate 2313, the scraper seat 22 and the scraper member 24 are in the locked state, and when the second cutting plane 2324 abuts against the transmission plate 2313, the scraper seat 22 and the scraper member 24 are in the unlocked state. When the first cutting plane 2323 is in contact with the transmission plate 2313, the locking hook 2312 is just engaged with the second connecting part 25. When the adjusting handle 232 is rotated, so that the second cutting plane 2324 is in contact with the transmission plate 2313, the transmission plate 2313 can be rotated to make the locking hook 2312 rotate in the direction away from the second connecting part 25. After being separated from the second connecting part 25, the scraper member 24 can be removed from the scraper seat 22, and the disassembly and assembly operation is simpler and more convenient.

[0056] The cutting depth of the second cutting plane 2324 is greater than the cutting depth of the first cutting plane 2323 . When the adjusting handle 232 is rotated from the first cutting plane 2323 toward the second cutting plane 2324 , the locking hook 2312 has a tendency to rotate toward the direction of disengaging from the second connecting portion 25 . Specifically, the first cutting plane 2323 and the second cutting plane 2324 are arranged in sequence along the circumference of the transmission column 2322. When the first cutting plane 2323 abuts against the transmission plate 2313, the transmission plate 2313 can be pressed at a first height, so that the locking hook 2312 is engaged with the second connecting portion 25. When the second cutting plane 2324 abuts against the transmission plate 2313, the transmission plate 2313 can be pressed at a second height. In the up and down direction of the base 1, the second height is higher than the first height, so that the height of the end of the transmission plate 2313 in contact with the adjusting handle 232 is higher, so that the transmission plate 2313 rotates upward, so that the locking hook 2312 rotates to disengage from the second connecting portion 25, thereby unlocking the scraper member 24.

[0057] Preferably, if Figure 4 As shown in , the second connecting portion 25 includes a locking shaft 251 disposed on the scraper member 24 , and the locking hook 2312 is engaged with the locking shaft 251 to lock the scraper member 24 on the scraper seat 22 .

[0058] The scraper seat 22 is roughly arranged in an elongated shape, and a first long hole is arranged on the scraper seat 22. The transmission plate 2313 and the locking hook 2312 are arranged in the long hole, and at least part of the locking hook 2312 can extend from the first long hole.

[0059] The transmission column 2322 is also provided with a limiting boss 2325 at the end facing away from the handle portion 2321, and a limiting groove is provided on the scraper seat 22, and the limiting groove has a first limiting wall and a second limiting wall arranged at intervals along the rotation direction of the transmission column 2322. When the adjustment handle 232 is rotated along the first direction to be in a locked state, the limiting boss 2325 abuts against the first limiting wall to limit the adjustment handle 232 from continuing to rotate along the first direction; when the adjustment handle 232 is rotated along the second direction to be in the unlocked state, the limiting boss 2325 abuts against the second limiting wall to limit the adjustment handle 232 from continuing to rotate along the second direction, and the first direction and the second direction are opposite.

[0060] In one embodiment, two sets of the first connection parts 23 and the second connection parts 25 are provided, and the two sets of the first connection parts 23 and the two sets of the second connection parts 25 are provided in a one-to-one correspondence. The two sets of the first connection parts 23 are arranged at intervals along the length direction of the scraper seat 22, so that the fixation between the scraper seat 22 and the scraper member 24 is more stable, and the scraper member 24 is not easy to shake.

[0061] The screen printing device 100 may also include a display device, which may be electrically connected to the control device, and the scraping pressure value of the scraper assembly 2 may be displayed in real time through the display device; moreover, the operator may adjust the scraping pressure value at the scraper assembly 2 by operating the display device, so that the pressure adjustment at the scraper assembly 2 is more convenient and more intuitive, and therefore more convenient to use, which can effectively improve the printing quality.

[0062] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure made using the contents of the specification and drawings of the present invention, or directly or indirectly used in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A screen printing device, characterized in that: include: Pedestal; A scraper assembly, movably arranged on the base; A scraper drive assembly is disposed on the base and includes a first drive structure and a second drive structure; The first driving structure is connected to the second driving structure, and can drive the second driving structure to move in the up-down direction of the base, and the second driving structure is connected to the scraper assembly; A pressure monitoring mechanism and a control device, wherein the control device is electrically connected to the pressure monitoring mechanism and the first driving structure, the pressure monitoring mechanism is used to monitor in real time the pressure value applied by the scraper assembly to the surface to be printed, and the control device can control the operation of the second driving structure according to the pressure value detected by the pressure monitoring mechanism to adjust the pressure applied to the scraper assembly.

2. The screen printing device according to claim 1, characterized in that: The first driving structure comprises: A lifting electric cylinder is arranged on the base; The first connecting plate is connected to the lifting electric cylinder, and the second driving structure is connected to the first connecting plate. The lifting electric cylinder drives the first connecting plate to move along the up and down directions of the base, and drives the second driving structure to move together.

3. The screen printing device according to claim 2, characterized in that: The first driving structure also includes a guide bottom plate and a guide top plate arranged at relative intervals along the up-down direction, a guide column connected between the guide bottom plate and the guide top plate, and a guide sleeve connected to the base, the guide column is movably sleeved in the guide sleeve along the up-down direction of the base, the second driving structure is arranged on the guide bottom plate, and the scraper assembly is connected to the guide bottom plate.

4. The screen printing device according to claim 3, characterized in that: The second driving structure includes a pressure-stabilizing cylinder arranged on the guide base plate, and a proportional valve connected to the pressure-stabilizing cylinder. The control device is electrically connected to the proportional valve. The control device can control the operation of the proportional valve according to the pressure value detected by the pressure monitoring mechanism to adjust the opening and closing degree of the proportional valve and the extension amount of the piston of the pressure-stabilizing cylinder.

5. The screen printing device according to claim 3, characterized in that: The scraper assembly comprises: A connecting block connected to the guide base plate; A scraper seat, rotatably connected to the connecting block; The scraper member is connected to the scraper seat.

6. The screen printing device according to claim 5, characterized in that: The scraper seat is provided with a first connecting portion, and the scraper member is provided with a second connecting portion. The first connecting portion and the second connecting portion are connected so that the scraper seat and the scraper member are detachably connected.

7. The screen printing device according to claim 6, characterized in that: The first connecting portion comprises: A locking member rotatably disposed on the scraper seat, wherein at least a portion of the locking member can extend from the scraper seat; An adjusting structure is movably arranged on the scraper seat and connected to the locking member. The adjusting structure can be moved relative to the scraper seat under the action of external force to drive the locking member to rotate, so that the locking member has a locked state in which it is engaged with the second connecting part, and an unlocked state in which it is separated from the second connecting part.

8. The screen printing device according to claim 7, characterized in that: The locking member includes a first rotating shaft, a locking hook fixedly connected to the first rotating shaft, and a transmission plate arranged on the locking hook, the first rotating shaft is rotatably arranged on the scraper seat, and the locking hook can extend from the bottom of the scraper seat; The adjustment structure includes an adjustment handle rotatably arranged on the scraper seat, the adjustment handle is provided with a stop portion, the adjustment handle rotates relative to the scraper seat, when the stop portion abuts against the end of the transmission plate, the locking hook is engaged with the second connecting portion to be in the locked state.

9. The screen printing device according to claim 8, characterized in that: The adjustment handle includes a handle portion and a transmission column arranged at one end of the handle portion, the transmission column is rotatably arranged in the scraper seat, the handle portion is located outside the scraper seat, the transmission column is arranged in a cylindrical shape, the stop portion includes a first cutting plane arranged on the outer peripheral side of the transmission column, and the transmission column is also provided with a second cutting plane, and the first cutting plane and the second cutting plane are arranged adjacent to each other; When the first cutting plane abuts against the transmission plate, the scraper seat and the scraper member are in the locked state, and when the second cutting plane abuts against the transmission plate, the scraper seat and the scraper member are in the unlocked state.

10. The screen printing device according to claim 9, characterized in that: The cutting depth of the second cutting plane is greater than the cutting depth of the first cutting plane, and when the adjustment handle rotates from the first cutting plane toward the second cutting plane, the locking hook has a tendency to rotate toward a direction of disengaging from the second connecting portion; and / or, The second connecting portion comprises a locking shaft provided on the scraper member; and / or, The first connection parts and the second connection parts are each provided with two sets, and the two sets of the first connection parts and the two sets of the second connection parts are provided in a one-to-one correspondence.

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