CN117261410A - Pressure control device, bearing device and printing equipment - Google Patents

Abstract

The application provides a pressure control device, a bearing device and printing equipment. The pressure control device includes printing unit, and printing unit includes: a driver; the scraper assembly comprises a fixed support and a printing scraper, the fixed support is provided with a first side and a second side which are away from each other, the driver is connected to the fixed support and arranged on the first side of the fixed support, the printing scraper is arranged on the second side, the fixed support is used for driving the printing scraper to move along a preset direction under the driving of the driver, and the printing scraper is used for abutting against a printing stock; the pressure sensor is positioned on the second side of the fixed support, and when the printing scraper is abutted against the printing object, the pressure sensor is abutted against the second side of the fixed support so as to acquire the printing pressure between the printing scraper and the printing object through the fixed support; and the controller is used for controlling the driver to drive the scraper component to move along a preset direction according to the printing pressure so as to enable the printing scraper to be abutted against the printing stock under the preset pressure. The application provides a accuse pressure equipment device can promote print quality.

Description

Pressure control device, carrying device and printing equipment

Technical field

This application relates to the field of printing technology, specifically to a pressure control device, a carrying device and printing equipment.

Background technique

Currently, vehicle sunroofs and other glass are generally patterned through screen printing. During the screen printing process, a servo motor is used to control the up and down strokes of the printing scraper so that the printing scraper squeezes the glass, and the ink is transferred to the glass surface through the mesh of the printing screen. However, since the sunroof of the vehicle is made of curved glass, the pressure exerted by the printing blade on the glass is uneven, resulting in poor printing quality.

Contents of the invention

This application provides a pressure control device, a carrying device and printing equipment that can improve printing quality.

In a first aspect, this application provides a pressure control device. The pressure control device includes a printing unit, and the printing unit includes:

driver;

Squeegee assembly, the scraper assembly includes a fixed bracket and a printing scraper. The fixed bracket has a first side and a second side that are away from each other. The driver is connected to the fixed bracket and is disposed on the first side of the fixed bracket. , the printing scraper is installed on the second side, the fixed bracket is used to drive the printing scraper to move in a preset direction under the driving of the driver, and the printing scraper is used to contact the substrate, wherein, The preset direction is the relative direction of the first side and the second side;

A pressure sensor, which is independent of the scraper assembly and located on the second side of the fixed bracket. When the printing scraper is in contact with the substrate, the pressure sensor is in contact with the substrate. the second side of the fixed bracket to obtain the printing pressure between the printing blade and the substrate through the fixed bracket; and

Controller, the controller is used to control the driver to drive the scraper assembly to move in a preset direction according to the printing pressure, so that the printing scraper contacts the substrate with a preset pressure.

Wherein, the pressure control device has a standby state and a working state. When the pressure control device is in the standby state, the printing scraper is separated from the substrate, and the fixed bracket is separated from the pressure sensor. , or the fixed bracket is in contact with the pressure sensor and the contact pressure is zero; when the pressure control device is in the working state, the printing scraper is in contact with the substrate, and the fixed bracket is in contact with the Pressure Sensor.

Wherein, when the printing pressure is less than a preset pressure, the controller generates a first signal, and the first signal is used to control the driver to drive the scraper assembly to move in a first preset direction. The preset direction is the direction from the first side toward the second side; when the printing pressure is greater than the preset pressure, the controller generates a second signal, and the second signal is used to control the driver to drive The scraper assembly moves in a second preset direction, and the second preset direction is the direction from the second side toward the first side.

Wherein, the pressure control device includes a plurality of printing units, the plurality of printing units are arranged in sequence along the target direction, and the adjacent printing units are connected.

Wherein, a plurality of the printing units are arranged in a curved shape.

Wherein, the printing scrapers of multiple printing units are connected in sequence to form a non-interrupted scraper strip, and the scraper strip is bendable.

Wherein, multiple fixed brackets of the printing units are connected in sequence to form a non-interrupted bracket strip, and the bracket strip is bendable.

Wherein, the fixed brackets in each of the printing units are independent entities to form intermittent bracket strips.

Wherein, the fixed bracket in each printing unit is made of an inflexible hard material.

Wherein, the fixed bracket includes a bracket body and a contact portion, the bracket body is connected to the printing squeegee, the abutment portion is protruding from one side of the bracket body, and the abutment portion is along the The orthographic projection of the preset direction on the pressure sensor at least partially falls within the range of the pressure sensor.

Wherein, the pressure control device further includes a bearing frame, the bearing frame includes a first bearing member, a second bearing member, and a connecting member, the driver is connected to the first bearing member, and the pressure sensor is connected to the The second bearing member, the connecting member is connected between the first bearing member and the second bearing member.

Wherein, the driver includes a body and a movable part, the movable part is telescopically connected to the body, and an end of the movable part away from the body is fixedly connected to the scraper assembly.

In a second aspect, this application also provides a carrying device, which includes:

Fetal membrane, the fetal membrane has a bearing surface, the bearing surface is a curved surface and is used to carry the substrate;

a rotating mechanism, the rotating mechanism is connected to the fetal membrane; and

A driving mechanism, the driving mechanism is connected to the rotating mechanism, and the driving mechanism is used to drive the rotating structure to drive the fetal membrane to rotate, so that the distance between the area to be printed on the substrate and the printing screen is a predetermined distance. Set distance.

In a third aspect, this application also provides a printing equipment, which includes: a pressure control device; a bearing device; and a printing screen, the printing screen being disposed between the pressure control device and the bearing device , the printing screen is provided with a preset pattern;

Wherein, the carrying device is used to drive the substrate to rotate so that the distance between the area to be printed on the substrate and the printing screen is a preset distance; the pressure control device is used to move the substrate with a preset pressure. The printing screen contacts the area to be printed on the substrate, and the pressure control device and the carrying device cooperate with each other to print the preset pattern on the substrate.

In the pressure control device provided by this application, since the pressure sensor and the printing scraper are both disposed on the same side of the fixed bracket, when the driver drives the printing scraper to contact the substrate, the fixed bracket will also contact the pressure sensor. Therefore, the printing scraper The pressure applied to the printing substrate is equal to or approximately equal to the pressure exerted by the pressure sensor from the fixed bracket. In other words, the pressure sensor can obtain the pressure exerted by the printing blade on the printing substrate in real time, that is, the printing pressure. The controller can then compare the printing pressure with the preset pressure, and then control the printing blade to move away from or toward the substrate according to the comparison result, so that the printing pressure is equal to or approximately equal to the preset pressure. Therefore, the control device provided by this application can contact the substrate with a constant force to perform printing. For the same substrate, substrates from the same batch or different batches can be printed at the same preset pressure, so that clear, even and consistent printing patterns can be obtained. For different types of substrates, you only need to set the preset pressure in advance, and then automatically adjust the printing pressure between the printing blade and the substrate through the cooperation of the pressure sensor and the controller to reach the set preset pressure (this process can be called It is adaptive printing) without the need to repeatedly manually adjust the driver to make the printing blade contact the printing substrate with a preset pressure, thus improving production efficiency. Therefore, when the pressure control device provided by the present application is used for printing, it can ensure that the contact pressure between the printing blade and the substrate is always maintained regardless of whether the substrate to be printed is of the same type or a curved substrate. The preset pressure enables conformal printing on the substrate, which can make the printing pattern clearer, even and consistent, improve production efficiency, and make the ink scrape cleaner to avoid ink residue on the printing screen. The problem of reduced utilization.

Description of the drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the implementation. Obviously, the drawings in the following description are some implementations of the present application. For ordinary people in the art For technical personnel, other drawings can also be obtained based on these drawings without exerting creative work.

Figure 1 is an exploded view of a printing device provided by an embodiment of the present application.

FIG. 2 is an assembly diagram of the printing equipment shown in FIG. 1 .

FIG. 3 is a schematic diagram of the carrying device in the printing equipment shown in FIG. 1 .

FIG. 4 is a schematic diagram of a printing device provided by an embodiment of the present application.

FIG. 5 is a schematic diagram of the printing device shown in FIG. 4 in a state.

FIG. 6 is a schematic diagram of the printing device shown in FIG. 4 in another state.

FIG. 7 is an exploded view of the pressure control device in the printing equipment shown in FIG. 1 .

FIG. 8 is an assembly diagram of the pressure control device shown in FIG. 7 .

FIG. 9 is an exploded view of the printing unit in the pressure control device shown in FIG. 7 .

Figure 10 is a schematic diagram of the electrical connection relationship in the printing unit provided by the embodiment of the present application.

FIG. 11 is a schematic diagram of the arrangement of multiple printing units in the pressure control device shown in FIG. 7 .

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

Reference herein to "an embodiment" or "an implementation" means that a particular feature, structure or characteristic described in connection with the example or implementation may be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.

The basic principle of screen printing is to use the basic principle that the graphic part of the printing screen is transparent to ink, and the non-graphic part of the mesh is impermeable to ink. When printing, pour ink on one end of the printing screen, use a printing scraper to apply a certain amount of pressure on the ink part of the printing screen, and move toward the other end of the printing screen at the same time. The ink is squeezed by the printing scraper from the mesh of the graphic part onto the substrate during movement. Due to the viscosity of the ink, the imprint is fixed within a certain range. During the printing process, the printing scraper is always in line contact with the printing screen and the substrate. The contact line moves with the movement of the printing scraper. Due to the gap between the printing screen and the substrate Maintain a certain gap so that the printing screen generates a reaction force on the printing scraper through its own tension during printing. This reaction force is called rebound force. Due to the effect of resilience, the printing screen and the substrate are only in moving line contact, while other parts of the printing screen are separated from the substrate. It causes the ink and printing screen to break apart, ensuring the printing dimensional accuracy and avoiding smearing of the substrate. When the printing scraper scrapes across the entire printing screen layout, it lifts up. At the same time, the printing screen also lifts up and gently scrapes the ink back to its original position. This is a printing process.

At present, glass (substrate) such as vehicle sunroofs is generally patterned through screen printing. During the screen printing process, a servo motor is used to control the up and down strokes of the printing scraper so that the printing scraper squeezes the printing screen and glass, and the ink is transferred to the glass surface through the mesh of the printing screen.

The existing screen printing for vehicle glass has the following problems:

(1) For the same glass product, such as skylights, etc., the glass profile may fluctuate up to ±1.5mm due to manufacturing influences, and the servo motor controls the printing scraper stroke to not follow the glass profile, resulting in glass ink printing The pattern is not clear;

(2) For different glass products, the glass surface shapes are different. Every time you print glass ink/heating wire silver paste/ambient lamp ink, you need to adjust the stroke of the servo motor. The debugging time of the printing equipment is long, which affects production. efficiency;

(3) Since the servo motor controls the stroke, the printing scraper and the glass surface do not conform to the shape, and the ink is not scraped clean, resulting in ink residue on the printing screen, which in turn leads to waste such as reduced ink utilization.

Based on this, the present application hopes to provide a solution that can solve but is not limited to the above technical problems, the details of which will be elaborated in subsequent embodiments.

Please refer to Figures 1 and 2. This application provides a printing equipment 100. The printing equipment 100 includes a pressure control device 10, a carrying device 20, and a printing screen 30. Wherein, the printing screen 30 is disposed between the pressure control device 10 and the carrying device 20 , and a preset pattern is provided on the printing screen 30 . The carrying device 20 is used to drive the substrate 200 to rotate, so that the distance between the area to be printed on the substrate 200 and the printing screen 30 is a preset distance. The pressure control device 10 is used to contact the printing screen 30 against the area to be printed on the substrate 200 with a preset pressure. The pressure control device 10 and the carrying device 20 cooperate with each other to print the preset pattern on the substrate 200 . Among them, the printing screen 30 can be made of, but is not limited to, polyester fiber/polyamide fiber silk material.

Specifically, the printing device 100 provided by this application is used to print a preset pattern on the substrate 200 . The preset pattern is set on the printing screen 30 . The preset pattern is composed of multiple meshes on the printing screen 30 . . The printing screen 30 is located between the pressure control device 10 and the carrying device 20 . The printing substrate 200 is placed on the carrying device 20 , and the printing substrate 200 is spaced opposite to the printing screen 30 . During printing, the pressure control device 10 presses down the printing screen 30 so that the printing screen 30 is close to the substrate 200 and the contact pressure between the control device and the substrate 200 reaches the preset pressure; at the same time, the pressure control device 10 moves from one end of the printing screen 30 toward the other end of the printing screen 30. While the pressure control device 10 is moving, the ink is squeezed onto the substrate 200 from the mesh that constitutes the preset pattern; in addition, the carrying device 20 drives The substrate 200 is rotated so that the distance between the area to be printed on the substrate 200 and the opposite printing screen 30 is a preset distance, so that a preset pattern with better quality can be printed on the curved substrate 200 . The substrate 200 may be, but is not limited to, a plastic product, a metal product, a glass product, etc. This application will only illustrate that the substrate 200 is an automobile glass. The automobile glass may be, but is not limited to, a sunroof or a front windshield. , rear windshield, etc.

Please refer to Figures 1 to 3. This application also provides a bearing device 20. The bearing device 20 includes: a fetal membrane 210, a rotating mechanism 220, and a driving mechanism 230. Wherein, the tire membrane 210 has a bearing surface M1, and the bearing surface M1 is a curved surface and is used for bearing the substrate 200. The rotating mechanism 220 is connected to the fetal membrane 210 . The connection between the rotating mechanism 220 and the tire membrane 210 may be detachable, such as a threaded connection, or connected through a bolt or other connecting member. Of course, the connection between the rotating mechanism 220 and the tire membrane 210 may also be a non-detachable connection, such as welding. The driving mechanism 230 is connected to the rotating mechanism 220 . The driving mechanism 230 is used to drive the rotating mechanism 220 to drive the fetal membrane 210 to rotate, so that the area to be printed on the substrate 200 is in contact with the printing screen 30 The distance is the preset distance.

Specifically, the fetal membrane 210 is a structure used to carry the printing substrate 200, and its bearing surface M1 is a curved surface, and the curved surface may be a spherical surface, a cylindrical surface, or other types. The curved bearing surface M1 is used to carry the curved substrate 200 . The substrate 200 may be, but is not limited to, glass. For automobile glass, most of the substrate 200 is curved. When printing the preset pattern on the curved printing substrate 200, it is difficult to ensure the printing quality, which is a problem existing in the prior art as mentioned above, especially for glass with large curvature and large spherical surface. Specifically, the substrate 200 is curved, while the printing screen 30 is flat, which causes the distance between the substrate 200 and the printing screen 30 to change in the lateral direction, because the printing screen 30 needs to rely on The pressure control device 10 presses downward in the vertical direction to contact the substrate 200 to print the preset pattern. Therefore, the deformation amount of the printing screen 30 required to contact the substrate 200 changes in the lateral direction.

Taking Figure 4 as an example, in the vertical direction, the pressure control device 10, the printing screen 30, and the carrying device 20 are arranged in sequence from top to bottom, and the substrate 200 is placed on the carrying device 20. When not printing, the substrate 200 and the printing screen 30 are spaced opposite each other, and the distance between the printing screen 30 and the substrate 200 changes in the transverse direction: first from large to small, and then from small to large. That is, the closer to the edge area, the larger the spacing is, and the closer to the middle area, the smaller the spacing is. For the edge area, due to the large spacing, during printing, the pressure control device 10 needs to exert a large force in the vertical direction to press the printing screen 30, causing the printing screen 30 to produce a large amount of deformation. to contact the printing substrate 200; for the middle area, due to the small spacing, the pressure control device 10 only needs to apply a small force in the vertical direction to press the printing screen 30 during printing, so that the printing screen 30 produces The printing substrate 200 can be contacted with a smaller amount of deformation. It can be understood that during printing, the deformation required at different positions of the printing screen 30 is different, and the tension is different, which will lead to a decrease in the life of the printing screen 30 and affect the printing quality of the subsequent printing substrate 200 products.

In this embodiment, the rotation mechanism 220 can drive the membrane 210 to rotate, so that the relative position of the substrate 200 and the printing screen 30 changes. In this way, the distance between the area to be printed on the substrate 200 and the printing screen 30 can be changed. Adjust to preset distance. The area to be printed refers to the area to be printed on the substrate 200 . The substrate 200 may include multiple sub-regions. During the rotation of the substrate 200 , each sub-region is sequentially used as an area to be printed. The preset distance is a distance range, and the distance between the area to be printed on the substrate 200 and the printing screen 30 is within this distance range.

In this embodiment, after the substrate 200 rotates along with the membrane 210, the control device is then used to squeeze the printing screen 30 so that the printing screen 30 contacts the area to be printed on the substrate 200 to print the area to be printed. After the above printing is completed, the tire membrane 210 is rotated again to adjust the distance between the next area to be printed on the substrate 200 and the printing screen 30 to a preset distance, and then the area to be printed is printed there. By circulating the above process in this way, by continuously rotating the tire membrane 210, the distance between the area to be printed on the substrate 200 and the printing screen 30 can be the preset distance every time printing is performed, which means that every time printing is performed, The deformation amount of the screen plate 30 is basically the same, so that the tension of the printing screen plate 30 can be optimized to ensure that it has a long service life, and it is also conducive to ensuring the printing quality of the subsequent printing substrate 200 products.

Taking FIG. 5 and FIG. 6 as an example, the printing material 200 includes a first sub-region S1 and a second sub-region S2. Please refer to Figure 5. First, the tire membrane 210 drives the substrate 200 to rotate, so that the first sub-region S1 faces the printing screen 30 to print the first sub-region S1. At this time, the first sub-region S1 is the target area to be printed. Printing area. Please refer to Figure 6. After the printing of the first sub-region S1 is completed, the tire membrane 210 drives the substrate 200 to rotate so that the second sub-region S2 faces the printing screen 30 to print the second sub-region S2. The second sub-area S2 is the area to be printed.

Please refer to Figures 7 to 8. This application provides a pressure control device 10. The pressure control device 10 includes a printing unit 110. The printing unit 110 includes: a driver 111, a scraper assembly 112, a pressure sensor 113, and a controller 114. .

The scraper assembly 112 includes a fixed bracket 1121 and a printing scraper 1122 . The fixed bracket 1121 has a first side C1 and a second side C2 that are away from each other. The driver 111 is connected to the fixed bracket 1121 and is disposed on the first side C1 of the fixed bracket 1121 . The printing blade 1122 is installed on the second side C2. The fixed bracket 1121 is used to drive the printing blade 1122 to move in a preset direction under the driving of the driver 111 . The printing scraper 1122 is used to contact the printing substrate 200 . Wherein, the preset direction is the relative direction of the first side C1 and the second side C2. The material of the printing scraper 1122 may be, but is not limited to, polyurethane (PU), with a Shore hardness of 55 to 75.

The pressure sensor 113 is independent of the scraper assembly 112 and located on the second side C2 of the fixed bracket 1121 . When the printing blade 1122 is in contact with the substrate 200 , the pressure sensor 113 is in contact with the second side C2 of the fixed bracket 1121 to obtain the relationship between the printing blade 1122 and the printing blade 1122 through the fixed bracket 1121 . The printing pressure between the printing substrates 200.

The controller 114 is used to control the driver 111 to drive the scraper assembly 112 to move in a preset direction according to the printing pressure, so that the printing scraper 1122 contacts the substrate 200 with a preset pressure.

For the driver 111: the driver 111 includes a body 1111 and a movable part 1112. As shown in Figure 9, the movable part 1112 is fixedly connected to the scraper assembly 112, and the movable part 1112 is telescopically connected to the body 1111. And one end of the movable portion 1112 away from the body 1111 is fixedly connected to the scraper assembly 112 . That is to say, the extension amount of the movable part 1112 from the body 1111 can change. When the extension amount of the movable part 1112 increases, the movable part 1112 drives the scraper assembly 112 to move toward the substrate 200. When the extension amount of the movable part 1112 increases, When the length decreases, the movable part 1112 drives the scraper assembly 112 away from the substrate 200 . In one embodiment, the driver 111 is a motor (such as a servo motor), the body 1111 of the driver 111 is the electronic control main part of the motor, and the movable part 1112 of the driver 111 is the output shaft of the motor. In another embodiment, the driver 111 is a hydraulic device or a pneumatic device, the body 1111 of the driver 111 is the cylinder, and the movable part 1112 of the driver 111 is the piston rod.

Regarding the scraper assembly 112: the scraper assembly 112 consists of a fixed bracket 1121 and a printing scraper 1122. The fixed bracket 1121 is used to connect the driver 111 and the printing scraper 1122 . The printing scraper 1122 is used to cooperate with the printing substrate 200 to jointly squeeze the printing screen 30 so that the ink can be transferred to the printing substrate 200 through the printing screen 30 . The movable part 1112 of the driver 111 is fixedly connected to the fixed bracket 1121 (detachable connection or non-detachable connection), the main body of the driver 111 is located on the first side C1 of the fixed bracket 1121, and the printing scraper 1122 is connected to the (detachable connection or non-detachable connection) The second side C2 of the bracket 1121 is fixed. When the driver 111 works, its movable portion 1112 drives the fixed bracket 1121 and the printing scraper 1122 to move in a preset direction to approach or move away from the printing substrate 200 .

Regarding the pressure sensor 113: "The pressure sensor 113 is independent of the scraper assembly 112" means "there is no direct or indirect fixed connection relationship between the pressure sensor 113 and the scraper assembly 112. The so-called fixed connection relationship means that the pressure sensor 113 will follow the scraper. The connection relationship between the movement of components 112". That is to say, the pressure sensor 113 does not move following the movement of the scraper assembly 112 . Since the pressure sensor 113 and the substrate 200 are both arranged on the second side C2 of the fixed bracket 1121, when the driver 111 drives the scraper assembly 112 to approach or squeeze the substrate 200, the second side C2 of the fixed bracket 1121 will also approach or squeeze the substrate 200 synchronously. The pressure sensor 113 is squeezed, so the force exerted by the pressure sensor 113 from the fixed bracket 1121 is equal to or approximately equal to the force exerted by the scraper assembly 112 on the substrate 200. Therefore, in this embodiment, through the pressure sensor 113 to obtain the printing pressure between the printing scraper 1122 and the substrate 200. Referring to FIG. 10 , the pressure sensor 113 is electrically connected to the controller 114 . After acquiring the printing pressure information, the pressure sensor 113 then transmits the printing pressure information to the controller 114 .

Regarding the controller 114: Please refer to Figure 10. The controller 114 is electrically connected to the driver 111. The controller 114 is used to receive printing pressure information from the pressure sensor 113 and control the movable portion 1112 of the driver 111 based on the printing pressure information. The amount of extension is such that the scraper assembly 112 contacts the substrate 200 with a preset pressure. The preset pressure refers to the pressure parameter set before printing. For different substrate 200 products, the preset pressure can be the same or different. It should be noted that the controller 114 can be integrated with the body 1111 of the driver 111 or the pressure sensor 113, or can be independent of the driver 111 and the pressure sensor 113, which is not limited here.

Furthermore, the pressure control device 10 has a standby state and a working state. When the pressure control device 10 is in the standby state, the printing scraper 1122 is separated from the printing substrate 200, and the fixing bracket 1121 Separate from the pressure sensor 113 , or the fixed bracket 1121 is in contact with the pressure sensor 113 and the contact pressure is zero. In short, when the pressure control device 10 is in the standby state, the printing pressure is zero. When the pressure control device 10 is in the working state, the printing blade 1122 is in contact with the substrate 200 , and the fixing bracket 1121 is in contact with the pressure sensor 113 . In short, when the When the pressure control device 10 is in the standby state, the printing pressure is greater than zero.

When the printing pressure is less than the preset pressure, the controller 114 generates a first signal. The first signal is used to control the driver 111 to drive the scraper assembly 112 to move in a first preset direction (i.e., the printing scraper 1122 moves toward the substrate 200) to increase the preset pressure, wherein the first preset direction is the direction from the first side C1 toward the second side C2.

When the printing pressure is greater than the preset pressure, the controller 114 generates a second signal. The second signal is used to control the driver 111 to drive the scraper assembly 112 to move in a second preset direction (ie, the printing scraper 1122 moves away from the substrate 200) to reduce the preset pressure, wherein the second preset direction is the direction in which the second side C2 faces the first side C1.

In summary, in the pressure control device 10 provided by the present application, since the pressure sensor 113 and the printing scraper 1122 are both disposed on the same side of the fixed bracket 1121, when the driver 111 drives the printing scraper 1122 to contact the substrate 200, the fixed bracket 1121 also will contact the pressure sensor 113 , therefore, the pressure exerted by the printing blade 1122 on the printing substrate 200 is equal to or approximately equal to the pressure the pressure sensor 113 receives from the fixed bracket 1121 . In other words, the pressure sensor 113 can obtain the information in real time. The pressure exerted by the printing scraper 1122 on the printing substrate 200 is the printing pressure. Then, the controller 114 can compare the printing pressure with a preset pressure, and then control the printing blade 1122 to move away from or toward the printing substrate 200 according to the comparison result, so that the printing pressure is equal to or approximately equal to the preset pressure. Therefore, the control device provided by the present application can contact the substrate 200 with a constant force to perform printing. For the same type of printing substrate 200, printing substrates 200 of the same batch or different batches can be printed with the same preset pressure, so that a clear, uniform and consistent printing pattern can be obtained. For different types of substrates 200, the preset pressure only needs to be set in advance, and then the printing pressure between the printing blade 1122 and the substrate 200 is automatically adjusted through the cooperation of the pressure sensor 113 and the controller 114 to reach the set preset pressure. (This process can be called adaptive printing). There is no need to repeatedly manually adjust the driver 111 to make the printing blade 1122 contact the printing substrate 200 with a preset pressure, thus improving production efficiency. Therefore, when the pressure control device 10 provided by the present application is used for printing, no matter whether the printing substrate 200 to be printed is of the same type or whether it is a curved printing substrate 200, the friction between the printing scraper 1122 and the printing substrate 200 can be ensured. The bonding pressure is always maintained at the preset pressure, so that the substrate 200 can be printed according to the shape, which can make the printing pattern clearer, even and consistent, can also improve production efficiency, and can also make the ink scrape cleaner to avoid ink ink. The remaining printing screen 30 causes a problem of reduced utilization.

Please refer to Figures 7 and 8. The pressure control device 10 includes a plurality of printing units 110. The plurality of printing units 110 are sequentially arranged along a target direction. The target direction is different from a preset direction. The target direction may be printing. The width direction of the object 200 may also be the length direction. Multiple printing units 110 are arranged in sequence, so that more printing substrates 200 can be covered, and the covered printing substrates 200 can obtain the same preset pressure during printing, which is beneficial to ensuring the uniformity and consistency of pattern printing. Sex is better.

Further, adjacent printing units 110 are connected. The connection here can be a direct connection or an indirect connection. It can be understood that after each printing unit 110 is connected, it forms a whole, which avoids mutual misalignment between the printing units 110, thereby ensuring better pattern printing quality.

Optionally, please refer to FIG. 11 , a plurality of the printing units 110 are arranged in a curved shape. That is, the target direction is a curved direction, and all the printing units 110 are arranged along the target direction of the curved direction to form a curved shape.

It can be understood that, for the curved printing substrate 200, its profile (surface) has fluctuations, that is, the surface of the curved printing substrate 200 is a curved profile. In this embodiment, all the printing units 110 are arranged in a curved shape, which makes it easier for the printing blade 1122 and the substrate 200 to fit together in a curved shape, thereby improving the printing quality.

Optionally, the printing scrapers 1122 of multiple printing units 110 are connected in sequence to form a non-interrupted scraper strip, and the scraper strip is bendable. That is to say, the printing scraper 1122 is not an independent individual, but is only a part of the scraper bar. The scraper bar is a continuous long strip-shaped whole. At the same time, the curvature of the squeegee bar can be changed. In each printing unit 110, by changing the extension of the movable portion 1112 of the driver 111, the curvature of the squeegee bar can be controlled.

In this embodiment, after the squeegee strip is taken as a whole, there is no gap between adjacent printing squeegees 1122, so that the printing substrate 200 can be covered more comprehensively, resulting in better uniformity and consistency of pattern printing. It can be understood that if the adjacent printing scrapers 1122 are not connected together, then there will be at least a partial gap at the junction between the two adjacent ones, and the corresponding printing substrate 200 in the gap cannot be squeezed, and accordingly, The pattern cannot be printed, and this problem can be solved well by setting all the printing scrapers 1122 as a whole scraper bar. In addition, for different printing substrates 200 products, their curvatures may be inconsistent. If each printing scraper 1122 is to be able to contact substrates 200 with different curvatures with the same preset pressure, the curvature of the scraper bar must also be different. different.

In this embodiment, the squeegee bar is set to be flexible, and then through the cooperative use of the pressure sensor 113 and the controller 114, the driver 111 in each printing unit 110 can be controlled to drive the squeegee bar, so that the squeegee bar reaches the required The curvature of the printing blade 1122 ensures that each printing blade 1122 can contact the printing substrate 200 with a preset pressure. This process only needs to set the preset pressure in advance, and then the pressure control device 10 can automatically complete it. Therefore, for any curved printing substrate 200, the pressure control device 10 can adaptively complete the printing process.

Optionally, multiple fixed brackets 1121 of the printing units 110 are connected in sequence to form a non-interrupted bracket strip, and the bracket strip is bendable. That is to say, the fixed bracket 1121 is not an independent entity, but is only a part of the bracket bar. The bracket bar is a continuous long strip-shaped whole. At the same time, the bending arc of the support bar can be changed. In each printing unit 110, by changing the elongation of the movable portion 1112 of the driver 111, the bending arc of the support bar can be controlled.

In this embodiment, since multiple fixed brackets 1121 are connected in sequence to form a non-interrupted bracket strip, and the bracket strip is bendable, through the cooperative use of the pressure sensor 113 and the controller 114, the pressure in each printing unit 110 can be controlled. The driver 111 drives the support bar so that the plurality of printing blades 1122 can also present a required curvature as a whole, thereby ensuring that each printing blade 1122 can abut against the substrate 200 with a preset pressure. This process only needs to set the preset pressure in advance, and then the pressure control device 10 can automatically complete it. Therefore, for any curved printing substrate 200, the pressure control device 10 can adaptively complete the printing process.

Optionally, the fixed brackets 1121 in each of the printing units 110 are independent entities to form intermittent bracket strips. That is to say, the adjacent fixed brackets 1121 are not fixedly connected together, and the movement of each fixed bracket 1121 does not affect each other.

In this embodiment, since the fixed brackets 1121 in each printing unit 110 are independent entities, and through the cooperative use of the pressure sensor 113 and the controller 114, the driver 111 in each printing unit 110 can be controlled to independently drive their respective The bracket 1121 is fixed so that the interrupted bracket strips can present a required curvature as a whole, thereby ensuring that each printing scraper 1122 can abut against the substrate 200 with a preset pressure. This process only needs to set the preset pressure in advance, and then the pressure control device 10 can automatically complete it. Therefore, for any curved printing substrate 200, the pressure control device 10 can adaptively complete the printing process. In addition, since the pressure sensor 113 indirectly obtains the printing pressure between the printing blade 1122 and the substrate 200 by contacting the fixed bracket 1121, the fixed bracket 1121 will directly affect the printing pressure. Since each printing unit in this embodiment The fixed brackets 1121 in 110 are independent entities. Therefore, adjacent fixed brackets 1121 will not pull each other and thus will not affect the size of the printing pressure. In other words, the structural form provided by this embodiment is more conducive to ensuring that each The printing scraper 1122 can contact the printing substrate 200 with a preset pressure, thereby achieving better uniformity and consistency of pattern printing.

Further optionally, the fixing brackets 1121 in each of the printing units 110 are independent entities and are made of inflexible hard material. Specifically, in this application, the printing pressure between the printing blade 1122 and the substrate 200 is obtained through the contact between the pressure sensor 113 and the fixed bracket 1121. If the fixed bracket 1121 itself is soft in texture, when it is in contact with the pressure sensor 113 Deformation may occur during the process, causing the detected printing pressure to be low. In this embodiment, the fixing bracket 1121 is made of hard material, so the fixing bracket 1121 is not easily deformed, and the measurement value of the printing pressure is more accurate. The fixed bracket 1121 can be made of metal with high hardness to ensure the accuracy of the printing pressure detected between the printing scraper 1122 and the substrate 200 when the pressure sensor 113 is in contact with the fixed bracket 1121 .

Please refer to Figure 9. The fixed bracket 1121 includes a bracket body 1121a and a contact portion 1121b. The bracket body 1121a is connected to the printing scraper 1122. The abutment portion 1121b is protruding from one side of the bracket body 1121a. , and the orthographic projection of the contact portion 1121b on the pressure sensor 113 along the preset direction at least partially falls within the range of the pressure sensor 113 . That is to say, the contact portion 1121b and the pressure sensor 113 overlap in projection along the preset direction. Therefore, when the contact portion 1121b moves along the preset direction, the contact portion 1121b can effectively contact the pressure sensor 113. The contact portion 1121b and the bracket body 1121a may have an integrated structure or a separate structure. The materials of the contact portion 1121b and the bracket body 1121a may be the same or different. The cross-sectional shape of the contact portion 1121b may be circular, triangular, rectangular, etc.

Please refer to Figures 7 and 8. The pressure control device 10 also includes a carrying frame 120. The carrying frame 120 includes a first carrying member 121, a second carrying member 122, and a connecting member 123. The driver 111 is connected to the The first bearing member 121 , the pressure sensor 113 is connected to the second bearing member 122 , and the connecting member 123 is connected between the first bearing member 121 and the second bearing member 122 .

Specifically, all printing units 110 are carried on the carrying frame 120 and are arranged in sequence along the extension direction of the carrying frame 120 . The first bearing member 121 of the bearing frame 120 is used to set the driver 111. The first bearing member 121 is in a long strip shape, and all the drivers 111 are arranged in sequence along the extension direction of the first bearing member 121. The second bearing member 122 of the bearing frame 120 is used to set the pressure sensor 113. The second bearing member 122 is in a long strip shape, and all the pressure sensors 113 are arranged in sequence along the extension direction of the second bearing member 122. The first bearing member 121 and the second bearing member 122 are connected through the connecting member 123, so that the bearing frame 120, the driver 111, the scraper assembly 112, the pressure sensor 113, etc. form an integral body.

The following is an example of the printing steps using curved glass as the substrate:

1. Control the ambient temperature and humidity before production: temperature: 18℃ to 25℃, humidity: 30% to 80%. Failure to control the temperature and humidity will cause the ink to evaporate faster;

2. First send the glass to the predetermined position and position the glass on the fetal membrane;

3. Place the printing screen on the screen frame holder of the edge printing machine. The edge of the printing screen should be 4mm to 15mm beyond the edge of the glass. Otherwise, the edge of the printing screen will stick to the screen and leak light. Move the screen frame to adjust the distance from the glass. Finally, Fixed screen frame;

4. The length of the printing scraper should be 50mm to 150mm slightly longer than the width of the printing screen, otherwise it will cause the glass printing edge to be too thin and light leakage; the printing scraper has a straight rubber end, a sharp end face, and no gaps, otherwise it will cause scraper marks on the printing edge;

5. Control the stroke of the printing scraper in the preset direction through the pressure control device;

6. Through the pressure control device, the printing pressure is controlled at 0.2Mpa to 0.5Mpa, otherwise insufficient pressure will cause printing light leakage;

7. Printing speed: 300mm/s to 600mm/s. Speeds less than 300mm/s will cause web sticking problems. Speeds greater than 600mm/s will lead to defects such as insufficient printing ink thickness and ink drip marks;

8. After printing, the ink return knife returns to the initial position and the printing thickness is greater than or equal to 20 μm; during the production process, ink is added once every 20 to 50 pieces of glass printed;

9. Check the printing quality: no whitening, light leakage, pinhole phenomenon, uniform blackness (use a density transmission instrument to measure the blackness ≥ 2.0), the printing pattern is clear, and there are no obvious jagged edges around the outline.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and cannot be understood as limitations of the present application. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present application. The embodiments are subject to changes, modifications, substitutions and modifications, and these improvements and modifications are also deemed to be within the protection scope of the present application.

Claims (14)

1. A pressure control device, characterized in that the pressure control device comprises a printing unit comprising:

a driver;

the scraper assembly comprises a fixed support and a printing scraper, wherein the fixed support is provided with a first side and a second side which are away from each other, the driver is connected with the fixed support and is arranged on the first side of the fixed support, the printing scraper is arranged on the second side, the fixed support is used for driving the printing scraper to move along a preset direction under the driving of the driver, and the printing scraper is used for abutting against a printing stock, wherein the preset direction is the opposite direction of the first side and the second side;

A pressure sensor independent of the doctor assembly and located on the second side of the fixed support, the pressure sensor being in abutment with the second side of the fixed support when the printing doctor is in abutment with the printing object, so as to obtain the printing pressure between the printing doctor and the printing object through the fixed support; and

and the controller is used for controlling the driver to drive the scraper component to move along a preset direction according to the printing pressure so as to enable the printing scraper to be abutted against the printing stock under the preset pressure.

2. The pressure control device of claim 1, wherein the pressure control device has a stand-by state and an operating state, wherein when the pressure control device is in the stand-by state, the printing doctor is separated from the printing stock, the fixed support is separated from the pressure sensor, or the fixed support is in contact with the pressure sensor and the contact pressure is zero; when the pressure control device is in the working state, the printing scraper is abutted to the printing stock, and the fixed support is abutted to the pressure sensor.

3. The pressure control device of claim 1, wherein the controller generates a first signal for controlling the driver to drive the doctor assembly in a first predetermined direction, the first predetermined direction being a direction of the first side toward the second side, when the printing pressure is less than a predetermined pressure; when the printing pressure is greater than the preset pressure, the controller generates a second signal, and the second signal is used for controlling the driver to drive the scraper assembly to move along a second preset direction, wherein the second preset direction is the direction of the second side towards the first side.

4. The pressure control device according to claim 1, wherein the pressure control device comprises a plurality of printing units, the plurality of printing units are sequentially arranged along a target direction, and adjacent printing units are connected.

5. The pressure control device of claim 4, wherein a plurality of said printing units are arranged in a curved shape.

6. The pressure control device of claim 4, wherein the printing blades of a plurality of said printing units are connected in series to form an uninterrupted blade bar, said blade bar being flexible.

7. The pressure control device of claim 4, wherein the plurality of fixed brackets of the printing unit are sequentially connected together to form an uninterrupted bracket strip, the bracket strip being bendable.

8. The pressure control device of claim 4, wherein the fixed supports in each of said print units are independent of each other to form intermittent support strips.

9. The pressure control device of claim 8, wherein the fixed support in each of the printing units is a rigid material that is inflexible.

10. The pressure control device according to any one of claims 1 to 9, wherein the fixing support comprises a support body and an abutting portion, the support body is connected to the printing doctor, the abutting portion is protruding on one side of the support body, and an orthographic projection of the abutting portion on the pressure sensor along the preset direction at least partially falls within a range of the pressure sensor.

11. The pressure control device of any one of claims 1 to 9, further comprising a carrier, the carrier comprising a first carrier, a second carrier, a connector, the driver being coupled to the first carrier, the pressure sensor being coupled to the second carrier, the connector being coupled between the first carrier and the second carrier.

12. The pressure control device according to any one of claims 1 to 9, wherein the driver comprises a body and a movable portion, the movable portion being telescopically connected to the body, and an end of the movable portion remote from the body being fixedly connected to the doctor assembly.

13. A carrier, the carrier comprising:

the tire membrane is provided with a bearing surface, and the bearing surface is a curved surface and is used for bearing a printing stock;

the rotating mechanism is connected to the tire membrane; and

the driving mechanism is connected to the rotating mechanism and is used for driving the rotating mechanism to drive the tire membrane to rotate so that the distance between the area to be printed of the printing stock and the printing screen is a preset distance.

14. A printing apparatus, the printing apparatus comprising:

the pressure control device according to any one of claims 1 to 12;

the carrier of claim 13; and

the printing screen is arranged between the pressure control device and the bearing device, and a preset pattern is arranged on the printing screen;

the bearing device is used for driving the printing stock to rotate so that the distance between the area to be printed of the printing stock and the printing screen is a preset distance; the pressure control device is used for abutting the printing screen plate to the area to be printed of the printing stock under preset pressure, and the pressure control device and the bearing device are matched with each other to print the preset pattern on the printing stock.