Automatic roller coating and printing device

Abstract

The utility model discloses an automatic roller coating and printing device which comprises a screen frame, the screen printing plate is arranged in the screen frame, and the screen printing plate is provided with hollow flower positions; the roll coating mechanism comprises a base, a longitudinal movement driving mechanism, a lifting driving mechanism, a first bracket, a roller and a rotary driving mechanism; the base is arranged on the screen frame in a longitudinal moving mode, and the longitudinal moving driving mechanism is in transmission connection with the base; the lifting driving mechanism is arranged at the base and is in transmission connection with the first bracket; the roller is transversely arranged and is arranged at the first support through a rotating shaft, and the rotating driving mechanism is arranged at the first support and is in transmission connection with the rotating shaft; and the control mechanism is connected with the longitudinal moving driving mechanism, the lifting driving mechanism and the rotating driving mechanism. The roll coating mechanism and the control mechanism are arranged on the screen frame, so that the screen frame has a roll coating function, and therefore, the automatic roll coating machine has the advantages of mechanical and automatic roll coating, high roll coating efficiency and uniform roll coating.

Description

Technical Field

[0001] This application relates to the field of printing technology for footwear or clothing materials, and specifically to an automatic roller coating printing device. Background Technology

[0002] Cutout screen roller coating printing involves applying a thick coating layer using rollers to achieve the final printing effect. Currently, the roller coating process requires manual operation, where the rollers are held and rolled back and forth on the screen. This method is time-consuming, labor-intensive, and has very low printing efficiency, resulting in high labor costs. Furthermore, the pressure applied by manually holding the rollers is difficult to control, as it relies entirely on the operator's printing experience, which can easily lead to uneven coating patterns. Utility Model Content

[0003] Therefore, there is a need to provide an automatic roller coating printing device to solve the problems of low efficiency and uneven coating caused by manual roller coating in the existing technology of stencil roller coating printing.

[0004] To achieve the above objectives, the inventors provide an automatic roller coating printing device, comprising:

[0005] Wire frame;

[0006] A screen, wherein the screen is disposed within the screen frame and the screen has a perforated pattern;

[0007] A roller coating mechanism includes a base, a longitudinal movement drive mechanism, a lifting drive mechanism, a first support, a roller, and a rotation drive mechanism. The base is longitudinally movable on the mesh frame, and the longitudinal movement drive mechanism is drivenly connected to the base. The lifting drive mechanism is located at the base and is drivenly connected to the first support. The roller is arranged laterally and is located at the first support via a rotating shaft. The rotation drive mechanism is located at the first support and is drivenly connected to the rotating shaft.

[0008] A control mechanism is connected to a longitudinal traverse drive mechanism, a lifting drive mechanism, and a rotary drive mechanism.

[0009] In a further embodiment, the roller coating mechanism further includes a second support and a pressure adjustment mechanism; the first support is connected to the lifting drive mechanism via the second support, and the first support can move vertically relative to the second support; the pressure adjustment mechanism is located at the second support and is connected to the first support.

[0010] In a further embodiment, the pressure regulating mechanism includes an electric press, a pneumatic press, or a hydraulic press.

[0011] In a further embodiment, the control mechanism includes a control module, a start switch, and a pressure regulating switch. The start switch and pressure regulating switch are located at the base, and the start switch, pressure regulating switch, and pressure regulating mechanism are connected to the control module.

[0012] In a further embodiment, the rotary drive mechanism is provided with a speed regulator.

[0013] In a further embodiment, the control mechanism includes a control module, a start switch, and a speed adjustment switch. The start switch and speed adjustment switch are located at the base, and the start switch, speed adjustment switch, speed regulator, and control module are connected.

[0014] In a further embodiment, the periphery of the inner frame of the mesh frame is provided with a support member to support the mesh plate; the mesh plate is detachably embedded in the mesh frame.

[0015] In a further embodiment, the screen printing plates are provided in multiple quantities, and the thickness of each screen printing plate is different.

[0016] In a further embodiment, the frame is provided with a positioning structure to define the position of the frame on the printing platform.

[0017] In a further embodiment, the positioning structure includes a positioning groove on the side of the frame to engage with a positioning protrusion on the printing platform.

[0018] Unlike existing technologies, the automatic roller coating printing device described above, by setting a roller coating mechanism and a control mechanism on the screen frame, enables the screen frame to have its own autonomous roller coating mechanism, thus eliminating the need for manual roller coating and realizing mechanized roller coating operations. Specifically, the roller coating mechanism is equipped with a longitudinal movement drive mechanism and a base that is longitudinally movable on the screen frame, allowing the roller to move longitudinally on the screen. By setting a lifting drive mechanism, when roller coating is needed, the roller is lowered from a height above the screen frame to a height below the screen frame and placed at a height in contact with the screen. When roller coating is completed, the roller is raised to a height above the screen frame and reset in conjunction with the longitudinal movement drive mechanism. By setting a rotary drive mechanism to drive the roller to rotate, and in conjunction with the longitudinal movement drive mechanism, the roller rolls back and forth on the screen. In addition, the control mechanism is connected to the longitudinal movement drive mechanism, the lifting drive mechanism, and the rotary drive mechanism, allowing the user to operate the device to control the longitudinal movement drive mechanism to move the base longitudinally, control the lifting drive mechanism to raise and lower the roller, and control the rotary drive mechanism to rotate the roller to coat the cutout patterns. Therefore, the automatic roller coating printing device achieves mechanized autonomous roller coating, which is highly efficient and produces uniform coating.

[0019] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0020] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0021] In the accompanying drawings of the instruction manual:

[0022] Figure 1 This is a structural diagram of the automatic roller coating and printing device described in a specific embodiment;

[0023] Figure 2 This is a side view of the automatic roller coating and printing apparatus described in the specific embodiment;

[0024] Figure 3 This is a diagram illustrating the working state of the automatic roller coating and printing device described in a specific embodiment.

[0025] Figure 4 This is a side view of the automatic roller coating and printing device in operation according to a specific embodiment;

[0026] Figure 5 This is a structural diagram of another embodiment of the automatic roller coating printing device;

[0027] The reference numerals used in the above figures are explained as follows:

[0028] 1. Wire frame;

[0029] 100. Positioning groove; 101. Longitudinal track; 102. Support component;

[0030] 2. Web version;

[0031] 200. Hollowed-out floral pattern;

[0032] 3. Base;

[0033] 300. Start switch; 301. Pressure regulating switch; 302. Speed ​​regulating switch;

[0034] 4. Longitudinal translation drive mechanism;

[0035] 5. Lifting drive mechanism;

[0036] 500, screw;

[0037] 6. First support;

[0038] 7. Roller;

[0039] 8. Shaft;

[0040] 9. Rotary drive mechanism;

[0041] 900, Driving wheel; 901, Driven wheel;

[0042] 10. Second support;

[0043] 11. Pressure regulating mechanism;

[0044] 12. Fabric;

[0045] 13. Printing platform;

[0046] 1300, positioning protrusion. Detailed Implementation

[0047] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0048] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0049] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0050] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0051] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0052] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0053] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0054] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0055] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0056] Cutout screen roller coating printing involves applying a thick coating layer using rollers to achieve the final printing effect. Currently, the roller coating process requires manual operation, where the rollers are held and rolled back and forth on the screen. This method is time-consuming, labor-intensive, and has very low printing efficiency, resulting in high labor costs. Furthermore, the pressure applied by manually holding the rollers is difficult to control, as it relies entirely on the operator's printing experience, which can easily lead to uneven coating patterns.

[0057] Therefore, this application provides an automatic roller coating printing device, which is an improvement on the existing stencil 2. It can realize automatic roller coating without manual roller coating, improve printing efficiency, and ensure uniform printing coating.

[0058] Please see Figure 1 and Figure 2 In a specific embodiment, the automatic roller coating printing device includes a frame 1, a screen 2, a roller coating mechanism, and a control mechanism.

[0059] The frame 1 is used to restrict the movement of the screen plate, so that the screen plate 2 is fixed relative to the fabric 12 when it is placed on the fabric 12. In addition, the frame 1 has an opening for placing the screen plate 2. The screen plate 2 is placed inside the frame 1, that is, inside the opening for placing the screen plate 2, and the bottom surface of the screen plate 2 is flush with the bottom surface of the frame 1. When the frame 1 is placed on the fabric 12, the bottom surface of the screen plate 2 can abut against the fabric 12. The screen plate 2 has a cutout pattern 200, which can be set into different patterns according to actual needs to meet different printing requirements.

[0060] The roller coating mechanism includes a base 3, a longitudinal movement drive mechanism 4, a lifting drive mechanism 5, a first support 6, a roller 7, and a rotation drive mechanism 9. The base 3 is longitudinally (i.e., parallel to the width direction of the mesh frame 1) and is movably mounted on the mesh frame 1. The longitudinal movement drive mechanism 4 is connected to the base 3. The lifting drive mechanism 5 is located at the base 3 and is connected to the first support 6. The roller 7 is arranged laterally (i.e., the central axis of the roller 7 is parallel to the length direction of the mesh frame 1) and is mounted on the first support 6 via a rotating shaft 8. The rotation drive mechanism 9 is located at the first support 6 and is connected to the rotating shaft 8. The control mechanism is connected to the longitudinal movement drive mechanism 4, the lifting drive mechanism 5, and the rotation drive mechanism 9.

[0061] The automatic roller coating and printing device, by setting a roller coating mechanism and a control mechanism on the screen frame 1, enables the screen frame 1 to have an autonomous roller coating mechanism and a built-in roller coating function, thus eliminating the need for manual roller coating and realizing mechanized roller coating operations. For details, please refer to... Figure 3 The roller coating mechanism, by setting a longitudinal drive mechanism 4 and allowing the base 3 to be longitudinally movable on the screen frame 1, enables the roller 7 to move longitudinally on the screen 2; by setting a lifting drive mechanism 5, therefore, please refer to... Figure 4When roller coating is required, the roller 7 is lowered from a height above the screen frame 1 to a height below the screen frame 1, and is positioned at a height in contact with the screen 2. When roller coating is complete, the roller 7 is raised to a height above the screen frame 1, and reset in conjunction with the longitudinal drive mechanism 4. If reset to the screen frame 1 but not on the screen 2, this does not affect the replacement of the screen 2. The roller 7 is driven to rotate by a rotary drive mechanism 9, which, in conjunction with the longitudinal drive mechanism 4, enables the roller 7 to roll back and forth on the screen 2. Furthermore, the control mechanism is connected to the longitudinal drive mechanism 4, the lifting drive mechanism 5, and the rotary drive mechanism 9, allowing the user to operate it. The user can control the longitudinal drive mechanism 4 to move the base 3 longitudinally, control the lifting drive mechanism 5 to raise and lower the roller 7, and control the rotary drive mechanism 9 to rotate the roller 7 to coat the perforated pattern 200. Therefore, the automatic roller coating printing device achieves mechanized autonomous roller coating, resulting in high efficiency and uniform coating.

[0062] In some embodiments, the length of the roller 7 is greater than the entire perforated pattern 200 to ensure that the entire perforated pattern 200 can be coated.

[0063] In some embodiments, a power supply is also included, which supplies power to the coating mechanism and the control mechanism, and the power supply may be a storage battery.

[0064] Please see Figure 1 and Figure 2 In some embodiments, the mesh frame 1 is provided with a longitudinal track 101, and the bottom of the base 3 is provided with a slider. The slider is located in the longitudinal track and can move the base 3 longitudinally. The longitudinal movement drive mechanism 4 is connected to the slider to drive the base 3 to move the roller 7 longitudinally.

[0065] In some embodiments, the wire frame 1 is made of one of the following materials: metal, acrylic, or fiberglass board.

[0066] In some embodiments, the longitudinal drive mechanism 4 includes a lead screw motor, the lead screw of which is longitudinally disposed within the longitudinal track 101, and the slider is threadedly connected to the lead screw. After the lead screw motor is started, the slider can be driven to move longitudinally under the action of the threaded transmission, thereby driving the base 3 to move longitudinally.

[0067] In a further embodiment, the lifting drive mechanism 5 can be a linear motor.

[0068] Please see Figure 2 and Figure 4 In other embodiments, the lifting drive mechanism 5 may include a rotary motor and a screw 500. The first bracket 6 is threadedly connected to the screw 500. The rotary motor drives the screw 500 to rotate, thereby moving the first bracket 6 up or down to achieve lifting.

[0069] In some embodiments, the rotary drive mechanism 9 includes a rotary motor, which is connected to the rotating shaft 8 in a transmission manner.

[0070] In a further embodiment, the rotary drive mechanism 9 further includes a drive wheel 900 and a driven wheel 901. The drive wheel 900 is connected in series at the output end of the rotary motor, and the driven wheel 901 is connected in series at the rotating shaft 8. The driven wheel 901 and the drive wheel 900 mesh. When the rotary motor is started, it drives the drive wheel 900 to rotate, the drive wheel 900 drives the driven wheel 901 to rotate, the driven wheel 901 drives the rotating shaft 8 to rotate, and then drives the roller 7 to rotate to perform the roller brush operation.

[0071] To enable adjustable roller coating pressure for achieving different printing effects, such as artistic varnish effects, please refer to [link / reference]. Figure 2 and Figure 4 In a further embodiment, the roller coating mechanism further includes a second support 10 and a pressure adjustment mechanism 11; the first support 6 is connected to the lifting drive mechanism 5 via the second support 10, and the first support 6 can move vertically relative to the second support 10; the pressure adjustment mechanism 11 is located at the second support 10 and is connected to the first support 6.

[0072] In a further embodiment, the control mechanism includes a control module, a start switch 300, and a pressure regulating switch 301. The start switch 300 and the pressure regulating switch 301 are located at the base 3, and the start switch 300, the pressure regulating switch 301, and the pressure regulating mechanism 11 are connected to the control module.

[0073] The pressure of the roller 7 can be controlled by the pressure regulating switch 301. When the start switch 300 is turned on, the roller 7 moves onto the screen 2 and descends to contact the screen 2, and moves longitudinally to start roller coating printing. The pressure of the roller 7 can be adjusted by the pressure regulating switch 301 to control the pressure of the roller 7 during printing, and the surface of the printed pattern can be dark or light. After the start switch 300 is turned off, the roller 7 automatically returns to the lower right position of the screen frame 1.

[0074] In some embodiments, the second bracket 10 is provided with a vertical track, and the first bracket 6 is vertically movable and disposed at the vertical track.

[0075] In a further embodiment, the pressure regulating mechanism 11 includes an electric press, a pneumatic press, or a hydraulic press.

[0076] In a further embodiment, the rotary drive mechanism 9 is provided with a speed regulator.

[0077] In a further embodiment, the control mechanism includes a control module, a start switch 300, and a speed adjustment switch 302. The start switch 300 and the speed adjustment switch 302 are located at the base 3, and the start switch 300, the speed adjustment switch 302, and the speed regulator are connected to the control module.

[0078] The speed of the roller 7 can be controlled by the speed adjustment switch 302. When the start switch 300 is turned on, the roller 7 moves onto the screen 2 and descends to contact the screen 2, and moves longitudinally to start roller coating printing. The printing speed can be adjusted by the pressure adjustment switch 301. The printing speed can be slow or fast. After the start switch 300 is turned off, the roller 7 automatically returns to the lower right position of the screen frame 1.

[0079] In some embodiments, the roller coating mechanism further includes a second support 10 and a pressure regulating mechanism 11 (specifically configured as described above); the rotary drive mechanism 9 is provided with a speed regulator; the control mechanism includes a control module, a start switch 300, a speed regulating switch 302, and a pressure regulating switch 301. The start switch 300, speed regulating switch 302, and pressure regulating switch 301 are located at the base 3, and the start switch 300, speed regulating switch 302, pressure regulating switch 301, speed regulator, and pressure regulating mechanism 11 are connected to the control module.

[0080] The pressure and speed of the roller 7 can be controlled by the pressure regulating switch 301 and the speed regulating switch 302. When the start switch 300 is turned on, the roller 7 moves onto the screen 2 and descends to contact the screen 2, moving longitudinally to begin roller coating printing. The printing speed can be adjusted by the pressure regulating switch 301, allowing for both slow and fast printing. The pressure of the roller 7 can also be adjusted by the pressure regulating switch 301, controlling the printing pressure and allowing for varying depths of the printed pattern. After the start switch 300 is turned off, the roller 7 automatically returns to its position at the lower right of the screen frame 1. This application allows for control of the pressure and speed during roller coating printing, ensuring the uniformity and consistency of the roller-coated coating.

[0081] In a further embodiment, the longitudinal movement drive mechanism 4 may also be equipped with a speed regulator. Correspondingly, the control mechanism further includes a speed adjustment switch. The speed adjustment switch, the speed regulator of the longitudinal movement drive mechanism 4 and the control module are connected to adjust the speed of longitudinal movement.

[0082] Please see Figure 5 In a further embodiment, the periphery of the inner frame of the mesh frame 1 is provided with a support member 102 to support the mesh plate 2; the mesh plate 2 is detachably embedded in the mesh frame 1.

[0083] In a further embodiment, there are several screen printing plates 2, each with a different thickness. Screen printing plates of different thicknesses can be switched according to the printing thickness requirements.

[0084] In traditional stencil printing, the stencil screen 2 can only be fixed on the frame 1 and cannot be replaced with screens 2 of other thicknesses. This application, by setting the support member 102, can automatically switch the screen 2 of the required thickness for printing, thus solving the problem of the single and limited use of the existing screen 2.

[0085] In a further embodiment, the frame 1 is provided with a positioning structure to limit the position of the frame 1 on the printing platform 13.

[0086] Please see Figure 5 In a further embodiment, the positioning structure includes a positioning groove 100 provided on the side of the frame 1 to cooperate with the positioning protrusion 1300 of the printing platform 13.

[0087] The automatic roller coating and printing device is used as follows:

[0088] 1. Lay the fabric 12 on the printing platform 13 and prepare the paste;

[0089] 2. According to the printing requirements, select the required screen 2 and place it into the screen 2 placement opening, and place the automatic roller coating printing device on the fabric 12;

[0090] 3. For paste printing, after the surface is smoothed, adjust the speed and pressure using the speed adjustment switch 302 and the pressure adjustment switch 301, then turn on the start switch 300. The roller 7 will start to automatically perform roller coating printing. Since the speed and pressure are controlled, the uniformity and consistency of the printed coating are ensured.

[0091] 4. Turn off the start switch 300, and the automatic roller coating and printing device will automatically return to the lower right position of the screen frame 1.

[0092] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. An automatic roll printing apparatus characterized by comprising: It includes: A screen frame; A screen provided in the screen frame, and the screen is provided with a hollow flower site; A rolling mechanism, the rolling mechanism includes a base, a longitudinal movement driving mechanism, a lifting driving mechanism, a first support, a roller, a rotating driving mechanism; the base is longitudinally movably provided on the screen frame, the longitudinal movement driving mechanism is in transmission connection with the base; the lifting driving mechanism is provided at the base and is in transmission connection with the first support; the roller is transversely arranged and is provided at the first support through a rotating shaft, the rotating driving mechanism is provided at the first support and is in transmission connection with the rotating shaft; A control mechanism connected with the longitudinal movement driving mechanism, the lifting driving mechanism and the rotating driving mechanism.

2. The automatic roll printing apparatus according to claim 1, wherein The rolling mechanism further includes a second support and a pressure adjusting mechanism; the first support is in transmission connection with the lifting driving mechanism through the second support, and the first support is vertically movable relative to the second support; the pressure adjusting mechanism is provided at the second support and is in transmission connection with the first support.

3. The automatic roll printing apparatus according to claim 2, wherein The pressure adjusting mechanism includes an electric press, a pneumatic press or a hydraulic press.

4. The automatic roll printing apparatus according to claim 2, wherein The control mechanism includes a control module, a starting switch and a pressure adjusting switch; the starting switch and the pressure adjusting switch are provided at the base, and the starting switch, the pressure adjusting switch and the pressure adjusting mechanism are connected with the control module.

5. The automatic roll printing apparatus according to claim 1, wherein The rotating driving mechanism is provided with a speed regulator.

6. The automatic roll printing apparatus according to claim 5, wherein The control mechanism includes a control module, a starting switch and a rotating speed adjusting switch; the starting switch and the rotating speed adjusting switch are provided at the base, and the starting switch, the rotating speed adjusting switch and the speed regulator are connected with the control module.

7. The automatic roll printing apparatus according to claim 1, wherein The periphery of the inner frame of the screen frame is provided with a supporting piece to support the screen; the screen is detachably embedded in the screen frame.

8. The automatic roll printing apparatus according to claim 7, wherein The screen is provided with a plurality of screens, and the thicknesses of the plurality of screens are different.

9. The automatic roll printing apparatus according to claim 1, wherein The screen frame is provided with a positioning structure to limit the position of the screen frame placed on the printing platform.

10. The automatic roll printing apparatus according to claim 9, wherein The positioning structure includes a positioning groove provided at the side of the screen frame to cooperate with the positioning protrusion of the printing platform.

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