Screen printing apparatus and screen printing method

Abstract

The application discloses a silk screen printing device and a silk screen printing method, and the silk screen printing device comprises a rack, a feeding mechanism, a feeding driving mechanism and a clamping mechanism. The feeding mechanism comprises a feeding assembly, a first feeding assembly and a discharging assembly. The feeding assembly, the first feeding assembly and the discharging assembly move synchronously. The feeding assembly comprises a grabbing assembly. The grabbing assembly comprises a first moving base, a first grabbing piece, a turnover sliding block and a turnover guide structure. When the first moving base moves in a first direction, the turnover sliding block drives the first grabbing piece to turn over. The discharging assembly also comprises a grabbing assembly. The first grabbing pieces of the two grabbing assemblies rotate reversely and synchronously. The feeding driving mechanism is connected with the first moving base. The clamping mechanism comprises a first clamping tool and a second clamping tool. The first clamping tool and the second clamping tool clamp or release synchronously.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing equipment, in particular to a screen printing equipment and a screen printing method. BACKGROUND

[0002] In the current screen printing equipment, although some conveying mechanisms for conveying products can realize continuous conveying of products, the state switching and position transformation of workpieces cannot be realized simultaneously in the workpiece feeding and discharging operations, the coordination between processes is poor, the processing efficiency has not been significantly improved, and the automation of the entire screen printing process is difficult to realize. SUMMARY

[0003] To solve at least one of the above technical problems, the present application provides a screen printing equipment and a screen printing method, and the technical solutions adopted are as follows:

[0004] The screen printing equipment provided by the present application has a feeding station, a pretreatment station, a hot stamping station and a discharging station, and comprises a rack, a feeding mechanism, a feeding driving mechanism, a clamping mechanism and a clamping driving mechanism. The feeding mechanism comprises a feeding assembly, a first feeding assembly and a discharging assembly. The feeding assembly, the first feeding assembly and the discharging assembly move synchronously. The feeding assembly comprises a grabbing assembly, which comprises a first moving seat, a first grabbing piece, a turnover sliding block and a turnover guide structure. The turnover sliding block is connected to the first grabbing piece, and the first grabbing piece is hinged to the first moving seat. When the first moving seat moves in a first direction, the turnover sliding block slides along the turnover guide structure, driving the first grabbing piece to turn over along the first moving seat. The discharging assembly also comprises a grabbing assembly, and the first grabbing pieces of the two grabbing assemblies rotate reversely and synchronously. The feeding driving mechanism is connected to the first moving seat. The clamping mechanism comprises a first clamping tool and a second clamping tool. The first clamping tool is arranged at the hot stamping station, and the second clamping tool is arranged at the pretreatment station. The first clamping tool and the second clamping tool clamp or release synchronously.

[0005] In some embodiments of the present application, the feeding mechanism comprises a turnover guide plate, and the turnover guide structure is a turnover sliding groove. The turnover sliding groove is formed in the turnover guide plate, and the height of the two ends of the turnover sliding groove is different. When the first moving seat drives the turnover sliding block to move in a first direction, the turnover sliding block rises or falls in the turnover sliding groove.

[0006] In some embodiments of the present application, the material grabbing assembly further comprises a turnover transmission structure, the turnover slider is connected with the first grabbing piece through the turnover transmission structure, the turnover transmission structure comprises a first connecting rod and a first rocker arm, the turnover slider is rotatably connected with the first connecting rod, one end of the first rocker arm is rotatably connected with the first connecting rod, and the other end is fixedly connected with the first grabbing piece, the turnover slider drives the first rocker arm to rotate through the first connecting rod, and in turn drives the first grabbing piece to overturn.

[0007] In some embodiments of the present application, the printing surface of the workpiece clamped by the first clamping tool is higher than the printing surface of the workpiece clamped by the second clamping tool, and the first feeding assembly comprises a second moving seat and a second grabbing piece, the second grabbing piece is slidably connected with the second moving seat, when the second moving seat moves in the first direction, the second grabbing piece rises to transfer the workpiece to the first clamping tool.

[0008] In some embodiments of the present application, the first feeding assembly further comprises a jacking slider and a jacking guide structure, the jacking slider is fixedly connected with the second grabbing piece, and the jacking slider is slidably connected with the second moving seat, when the second moving seat moves in the first direction, the jacking slider slides along the jacking guide structure to drive the second grabbing piece to rise.

[0009] In some embodiments of the present application, the jacking guide structure is provided as a jacking sliding groove, the feeding mechanism comprises a jacking guide plate, the jacking sliding groove is formed in the jacking guide plate, and the heights of two ends of the jacking sliding groove are different, when the second moving seat drives the jacking slider to move in the first direction, the jacking slider rises in the jacking sliding groove.

[0010] In some embodiments of the present application, the first clamping tool comprises a leveling arm and a leveling driving piece, the leveling arm is hingedly installed on the rack, the leveling driving piece is hingedly connected with the leveling arm, the leveling driving piece drives the leveling arm to rotate to drive the workpiece to rotate, and adjusts the angle between the printing surface and the screen printing plate.

[0011] In some embodiments of the present application, the first clamping tool further comprises a limiting assembly, the limiting assembly comprises a first fixed block, a limiting structure and a second fixed block, the first fixed block is fixedly connected with the leveling arm, the second fixed block is fixedly connected with the rack, and the first fixed block and the second fixed block are connected through the limiting structure to limit the leveling arm from shaking in the first direction.

[0012] In some embodiments of the present application, the limiting structure comprises a limiting sliding seat and a limiting guide structure, the limiting sliding seat is in sliding connection with the limiting guide structure, when the leveling arm rotates, the limiting sliding seat slides along the limiting guide structure to compensate for the distance change between the first fixed block and the second fixed block.

[0013] The present application also provides a screen printing method, which is implemented based on the aforementioned screen printing device, and comprises the following steps:

[0014] The feeding assembly is used to grab the workpiece at the feeding station, the first feeding assembly is used to grab the workpiece at the pretreatment station, and the discharging assembly is used to grab the workpiece at the hot stamping station.

[0015] The feeding driving mechanism is started, the feeding assembly moves to the next station in the first direction, the first feeding assembly moves to the hot stamping station in the first direction, and the discharging assembly moves to the discharging station in the first direction, while the two first grabbing parts are reversely and synchronously flipped to realize feeding and discharging.

[0016] The second clamping tool is used to clamp the workpiece at the pretreatment station, and the first clamping tool is used to clamp the workpiece at the hot stamping station.

[0017] The feeding driving mechanism is started, the feeding assembly moves to the feeding station in the reverse direction of the first direction, the first feeding assembly moves to the pretreatment station in the reverse direction of the first direction, and the discharging assembly moves to the hot stamping station in the reverse direction of the first direction, while the two first grabbing parts are reversely and synchronously flipped to be ready for the next feeding and discharging, and the above steps are repeated to realize the automatic operation of the screen printing device.

[0018] The embodiments of the present application have at least the following beneficial effects: the feeding mechanism and the clamping mechanism of the screen printing device are cooperated to work, the feeding mechanism can realize the synchronous flipping of the workpiece when moving to the next station through the grabbing assembly so that the printing surface faces upward, thereby improving the overall efficiency of the screen printing process. Meanwhile, the feeding assembly and the discharging assembly are both provided with the feeding assembly to realize the synchronization of feeding and discharging, thereby further improving the cooperation of the screen printing process. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings in which:

[0020] Figure 1 Fig. 1 is a structural schematic diagram of a screen printing device;

[0021] Figure 2 Fig. 2 is a structural schematic diagram of a feeding mechanism of the screen printing device; Figure 1 Fig. 3 is a structural schematic diagram of a clamping mechanism of the screen printing device;

[0022] Figure 3 Fig. 4 is a structural schematic diagram of a feeding and discharging mechanism of the screen printing device; Figure 2Structure diagram of the feeding mechanism provided in the feeding assembly;

[0023] Figure 4 For Figure 2 Structure diagram of the feeding mechanism provided in the first feeding assembly;

[0024] Figure 5 For Figure 2 Structure diagram of the feeding mechanism provided in the feeding assembly;

[0025] Figure 6 For Figure 1 Structure diagram of the clamping mechanism provided in the screen printing device;

[0026] Figure 7 For Figure 6 Structure diagram of the first clamping tool provided in the clamping mechanism;

[0027] Figure 8 For Figure 7 Structure diagram of the limiting assembly provided in the first clamping tool;

[0028] Figure 9 For Figure 1 Structure diagram of the rack provided in the screen printing device.

[0029] The drawings show that: 100, the rack; 101, the hot stamping station; 102, the pretreatment station; 103, the surface treatment station; 111, the jacking chute; 112, the feeding chute; 113, the discharging chute; 121, the feeding driving piece; 122, the synchronous belt; 210, the first clamping tool; 211, the first movable part; 2111, the first clamping part; 212, the first fixed part; 2121, the fourth clamping part; 220, the second clamping tool; 221, the second movable part; 2211, the second clamping part; 230, the third clamping tool; 231, the third movable part; 2311, the third clamping part; 310, the feeding assembly; 311, the first moving seat; 312, the lifting seat; 313, the first grabbing piece; 314, the first connecting rod; 315, the first rocker arm; 316, the guide sliding block; 317, the turnover sliding block; 320, the first feeding assembly; 321, the second moving seat; 322, the second grabbing piece; 330, the discharging assembly; 340, the second feeding assembly; 341, the third moving seat; 342, the third grabbing piece; 410, the rotating shaft; 421, the first arm rod; 422, the second arm rod; 423, the third arm rod; 430, the leveling driving piece; 440, the limiting structure; 441, the first fixed block; 442, the second fixed block; 443, the connecting block; 444, the limiting sliding rail; 445, the limiting sliding seat; 500, the feeding conveyor belt; 510, the positioning structure. DETAILED DESCRIPTION

[0030] The application will be described below with reference to the accompanying drawings, in which Figures 1 to 9 Embodiments of the application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations used throughout the drawings denote the same or similar elements or elements having the same or similar functions. The embodiments described below by reference to the accompanying drawings are exemplary only, and are used only for the purpose of explaining the present application, and should not be understood as limiting the present application.

[0031] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application. The features defined as "first", "second" are used to distinguish the feature names, and do not have special meanings, and in addition, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0032] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the current screen printing equipment, although there are some conveying mechanisms for conveying products to realize continuous conveying operation of the products, but it still cannot realize the state switching and position transformation of the workpieces during the workpiece loading and unloading operation, and the coordination between the processes is poor, the processing efficiency has not been significantly improved, and it is difficult to realize the automation of the entire screen printing process.

[0034] The present application relates to a silk screen printing device, which has a feeding station, a pretreatment station 102, a hot stamping station 101, a discharging station, and comprises a rack 100, a feeding mechanism, a feeding driving mechanism, a clamping mechanism and a clamping driving mechanism. The feeding mechanism comprises a feeding assembly 310, a first feeding assembly 320 and a discharging assembly 330. The feeding assembly 310, the first feeding assembly 320 and the discharging assembly 330 move synchronously. The feeding assembly 310 comprises a grabbing assembly, which comprises a first moving seat 311, a first grabbing piece 313, a turnover sliding block 317 and a turnover guide structure. The turnover sliding block 317 is connected with the first grabbing piece 313, and the first grabbing piece 313 is hinged to the first moving seat 311. When the first moving seat 311 moves in a first direction, the turnover sliding block 317 slides along the turnover guide structure, thereby driving the first grabbing piece 313 to turn over along the first moving seat 311. The discharging assembly 330 also comprises a grabbing assembly, and the first grabbing pieces 313 of the two grabbing assemblies rotate reversely and synchronously. The feeding driving mechanism is connected with the first moving seat. The clamping mechanism comprises a first clamping tool 210 and a second clamping tool 220. The first clamping tool 210 is arranged at the hot stamping station 101, and the second clamping tool 220 is arranged at the pretreatment station 102. The first clamping tool 210 and the second clamping tool 220 clamp or release synchronously. The feeding mechanism of the silk screen printing device cooperates with the clamping mechanism. The feeding mechanism can realize synchronous turnover of the workpiece when it moves to the next station by the grabbing assembly, so that the printing surface faces upward, thereby improving the overall efficiency of the silk screen printing process. Meanwhile, the feeding assembly 310 and the discharging assembly 330 are both provided with feeding assemblies to realize synchronous feeding and discharging, thereby further improving the cooperation of the silk screen printing process.

[0035] In some embodiments, the feeding mechanism comprises a turnover guide plate, and the turnover guide structure is a turnover sliding groove, which is formed in the turnover guide plate. The height of the two ends of the turnover sliding groove is different, so that the turnover sliding block 317 rises or falls in the turnover sliding groove when the first moving seat 311 drives the turnover sliding block 317 to move in the first direction. In other embodiments, the turnover sliding groove can be directly formed in the rack 100. It can be understood that the turnover guide structure can also be a guide rod, a guide sliding rail or the like. In the present embodiment, the feeding sliding groove 112 of the feeding assembly 310 and the discharging sliding groove 113 of the discharging assembly 330 are mirror images, so as to realize synchronous feeding and discharging of the workpiece.

[0036] Further, the grabbing assembly further comprises a turnover transmission structure, the turnover slider 317 is connected with the first grabbing piece 313 through the turnover transmission structure, the turnover transmission structure comprises a first connecting rod 314 and a first rocker arm 315, the turnover slider 317 is rotatably connected with the first connecting rod 314, one end of the first rocker arm 315 is rotatably connected with the first connecting rod 314, and the other end is fixedly connected with the first grabbing piece 313, the turnover slider 317 drives the first rocker arm 315 to rotate through the first connecting rod 314, and then drives the first grabbing piece 313 to overturn. It can be understood that when the turnover slider 317 rises or falls in the turnover sliding groove, the first connecting rod 314 is driven to swing along the hinge joint of the first connecting rod 314 and the turnover slider 317, and then drives the first rocker arm 315 to rotate along the hinge joint of the first grabbing piece 313 and the first moving seat 311, drives the first grabbing piece 313 to rotate, adjusts the angle of the printing surface of the workpiece, and switches the workpiece from standing to horizontal placement, so as to facilitate subsequent processing and stamping operations.

[0037] In some embodiments, the grabbing assembly further comprises a guide slider 316, the guide slider 316 is fixedly connected with the turnover slider 317, and the guide slider 316 is slidingly installed on the first moving seat 311. It can be understood that the turnover slider 317 realizes the sliding connection with the first moving seat 311 through the guide slider 316, so as to limit the moving direction and ensure that the turnover slider 317 and the first moving seat 311 move synchronously in the first direction.

[0038] Further, the grabbing assembly further comprises a first rolling piece, the first rolling piece is installed on the turnover slider 317, and the turnover slider 317 is in contact with the inner wall of the turnover sliding groove through the first rolling piece. It can be understood that the first rolling piece can change the sliding contact of the turnover slider 317 in the turnover sliding groove into rolling contact. Specifically, the first rolling piece can be in the form of a bearing, a roller, a ball or the like.

[0039] In some embodiments, the screen printing machine further has a surface treatment station 103, the surface treatment station 103 is arranged between the feeding station and the pretreatment station 102, and the surface of the workpiece is subjected to dust removal treatment to improve the printing quality. In combination with the drawings, the clamping mechanism further comprises a third clamping tool 230, the third clamping tool 230 is arranged at the surface treatment station 103, and the third clamping tool 230 is synchronously clamped or released with the second clamping tool 220 and the first clamping tool 210. Specifically, the third clamping tool 230 comprises a third movable part 231 and a third clamping part 2311, the third clamping part 2311 is rotatably installed on the third movable part 231, and the third movable part 231 is installed on the rack 100.

[0040] It can be understood that the screen printing apparatus further comprises a clamping driving structure. In some embodiments, the clamping driving structure comprises a plurality of driving members for driving the first clamping tool 210, the second clamping tool 220 and the third clamping tool 230 respectively, and the plurality of driving members are electrically connected to realize synchronous control. In other embodiments, the clamping driving structure comprises one driving member and a synchronous structure, and the first clamping tool 210, the second clamping tool 220 and the third clamping tool 230 are connected to the synchronous structure to realize synchronous clamping or loosening. Specifically, the synchronous structure can be a synchronous belt 122 or a synchronous connecting rod.

[0041] Corresponding to the surface treatment station 103, the feeding mechanism further comprises a second feeding assembly 340 for transferring the workpiece in the surface treatment station 103 to the pretreatment station 102. Specifically, the second feeding assembly 340 comprises a third moving seat 341 and a third grabbing member 342, and the third moving seat 341 is connected with the feeding driving mechanism, and the third grabbing member 342 is fixed to the third moving seat 341.

[0042] Specifically, the feeding driving mechanism comprises a feeding driving member 121 and a synchronous belt 122, and the first moving seat 311, the second moving seat 321 and the third moving seat 341 are connected with the synchronous belt 122 to realize synchronous movement in the same direction. It can be understood that the feeding driving mechanism further comprises a feeding guide structure extending in the first direction to guide the first moving seat 311, the second moving seat 321 and the third moving seat 341 to reciprocate in the first direction.

[0043] Further, the feeding mechanism comprises a grabbing driving mechanism, and the first grabbing member 313, the second grabbing member 322 and the third grabbing member 342 are connected with the grabbing driving mechanism. In this embodiment, the grabbing members are in the form of clamping jaws, which can grab the workpiece by clamping the peripheral wall of the workpiece. In other embodiments, the grabbing members can also grab the workpiece by negative pressure adsorption or other methods. It can be understood that the grabbing driving mechanism can drive the first grabbing member 313, the second grabbing member 322 and the third grabbing member 342 to grab or loosen synchronously through electrical control or mechanical structure connection.

[0044] In some embodiments, the screen printing apparatus further comprises a feeding mechanism for transporting the workpiece to the feeding mechanism, and the feeding mechanism comprises a positioning structure 510 fixedly connected with the rack 100, and the workpiece abuts against the positioning structure 510 to be grabbed by the feeding assembly 310. In combination with the drawings, the positioning structure 510 is installed at one end of the feeding mechanism close to the feeding mechanism, and the other end of the positioning structure 510 is open to form a semi-closed cavity. The feeding mechanism drives the workpiece into the semi-closed cavity until the workpiece abuts against the positioning structure 510 to realize positioning of the workpiece.

[0045] Specifically, the feeding mechanism comprises a feeding driving member and a feeding conveyor 500, the feeding driving member drives the feeding conveyor 500 to move to drive the workpiece to the feeding station. In the embodiment, the positioning structure 510 is provided as a positioning plate to limit the workpiece from moving with the feeding conveyor 500. It can be understood that when the workpiece is a special-shaped product that is difficult to fix, the positioning structure 510 is provided as a positioning block with a certain thickness to avoid the workpiece from falling down.

[0046] Further, the semi-closed cavity has at least two positioning portions that simultaneously abut against the peripheral wall of the workpiece to limit the workpiece from shaking to facilitate the subsequent feeding assembly 310 to grab the workpiece. In the embodiment, the semi-closed cavity has a U-shaped cross section that is suitable for positioning the product with a cylindrical bottle body; in other embodiments, the cross section of the semi-closed cavity can also be provided as a V-shaped or other polygonal shape to be suitable for positioning the product with a polygonal or polygonal pyramid bottle body.

[0047] In some embodiments, the feeding assembly 310 further comprises a lifting driving member connected with the first grabbing member 313, the lifting driving member drives the first grabbing member 313 to rise to drive the workpiece to rise and separate from the positioning structure 510. Specifically, the lifting driving member is provided as a telescopic pneumatic cylinder, the telescopic pneumatic cylinder is installed on the first moving seat 311, and the telescopic end of the telescopic pneumatic cylinder is connected with the first grabbing member 313.

[0048] Further, the first moving seat 311 is provided with a lifting guide structure, the first grabbing member 313 reciprocates along the lifting guide structure to realize the lifting or falling of the workpiece. It can be understood that the lifting guide structure is provided as a guide rod, a guide rail or a guide groove to guide the moving direction of the first grabbing member 313. In the embodiment, the lifting guide structure is provided as a lifting rail fixed on the first moving seat 311.

[0049] In some embodiments, the feeding assembly 310 further comprises a lifting seat 312, the first grabbing member 313 is slidingly connected with the first moving seat 311 through the lifting seat 312. It can be understood that the lifting seat 312 reciprocates along the lifting guide structure to drive the first grabbing member 313 to lift or fall to avoid the interference between the workpiece and the positioning structure 510.

[0050] It can be understood that in other embodiments, the feeding assembly 310 comprises an elongated arm, the first grabbing member 313 and the first moving seat 311 are connected through the elongated arm, when the first grabbing member 313 grabs the workpiece at the positioning structure 510, the elongated arm pushes the workpiece away from the feeding mechanism to separate from the positioning structure 510, and then drives the workpiece to flip to avoid the interference between the workpiece and the positioning structure 510.

[0051] In some embodiments, the first clamping tool 210 is arranged higher than the second clamping tool 220, the first feeding assembly 320 comprises a second moving base 321 and a second grabbing piece 322, the second grabbing piece 322 is in sliding connection with the second moving base 321, when the second moving base 321 moves in the first direction, the second grabbing piece 322 rises to transfer the workpiece to the first clamping tool 210. It can be understood that the height of the hot stamping station 101 is different from that of the pretreatment station 102, which avoids the screen printing plate of the hot stamping station 101 from contacting the workpiece of the previous station during processing of the workpiece, thereby ensuring the printing quality.

[0052] Specifically, the first clamping tool 210 comprises a first clamping part 2111, the second clamping tool 220 comprises a second movable part 221 and a second clamping part 2211 installed on the second movable part 221, and the first clamping part 2111 and the second clamping part 2211 both clamp the workpiece by abutting against the end of the workpiece. When the workpiece is clamped, the first clamping part 2111 and the second clamping part 2211 are coaxial with the workpiece. In the embodiment, the first clamping part 2111 is arranged higher than the second clamping part 2211 to lift the printing surface of the workpiece at the hot stamping station 101. The third clamping part 2311 is arranged at the same height as the second clamping part 2211.

[0053] Further, the first clamping tool 210 further comprises a first movable part 211, the first movable part 211 is installed on the rack 100, the first clamping part 2111 is installed on the first movable part 211, and the first movable part 211 drives the first clamping part 2111 to move towards or away from the workpiece to clamp or release the workpiece. In the embodiment, the first clamping part 2111 is rotatably installed on the first movable part 211 to drive the printing surface of the workpiece to rotate to complete printing. The first movable part 211 is arranged as a telescopic pneumatic cylinder, and the first clamping part 2111 is installed on the telescopic end of the telescopic pneumatic cylinder. In other embodiments, the first movable part 211 can also be arranged as a sliding pneumatic cylinder which is slidingly installed on the rack 100 to drive the first clamping part 2111 to move towards or away from the workpiece.

[0054] In some embodiments, the first movable part 211 is provided with two first movable parts 211, and the two first movable parts 211 move reversely and synchronously to move the two first clamping parts 2111 towards or away from each other, thereby clamping or releasing the workpiece at the hot stamping station 101. In other embodiments, the first clamping tool 210 further comprises a first fixed part 212, the first fixed part 212 is fixedly installed on the rack 100, the first fixed part 212 is provided with a fourth clamping part 2121, and the first movable part 211 drives the first clamping part 2111 to move towards or away from the fourth clamping part 2121 to clamp or release the workpiece.

[0055] Further, the first feeding assembly 320 further comprises a jacking slide block and a jacking guide structure, the jacking slide block is fixedly connected with the second grabbing piece 322, and the jacking slide block is slidingly connected with the second moving seat 321. When the second moving seat 321 moves in the first direction, the jacking slide block slides along the jacking guide structure to drive the second grabbing piece 322 to rise. It can be understood that the jacking guide structure can be arranged as a guide rod or a guide screw rod and the like which can guide the jacking slide block to move up and down. In some embodiments, the first feeding assembly 320 further comprises a jacking driving piece, the jacking driving piece drives the jacking slide block to move up and down to drive the second grabbing piece 322 and the workpiece to rise or fall back, and the jacking driving piece can be arranged in the form of a telescopic motor, a telescopic cylinder and the like.

[0056] In the embodiment, the jacking guide structure is arranged as a jacking sliding groove 111, and the feeding mechanism further comprises a jacking guide plate, the jacking sliding groove 111 is arranged on the jacking guide plate, and the height of the two ends of the jacking sliding groove 111 is arranged to be different. When the second moving seat 321 drives the jacking slide block to move in the first direction, the jacking slide block rises in the jacking sliding groove 111. It can be understood in combination with the drawings that the path of the jacking sliding groove 111 can limit the different jacking distances of the second grabbing piece 322, so as to adapt to the different height differences between the first clamping part 2111 and the second clamping part 2211, and enhance the step coordination between the jacking of the workpiece by the second grabbing piece 322 and the clamping of the workpiece by the first clamping part 2111.

[0057] Further, the first feeding assembly 320 further comprises a second rolling piece, the second rolling piece is installed on the jacking slide block, and the jacking slide block is in contact with the inner wall of the jacking sliding groove 111 through the second rolling piece. It can be understood that the second rolling piece is arranged to change the sliding contact between the jacking slide block and the jacking sliding groove 111 into rolling contact. Specifically, the second rolling piece can be arranged in the form of a bearing, a ball, a roller and the like.

[0058] In some embodiments, the first clamping tool 210 further comprises a leveling arm and a leveling driving piece 430, the leveling arm is hingedly installed on the rack 100, and the leveling driving piece 430 is hingedly connected with the leveling arm. Specifically, the first movable part 211 is installed on the leveling arm, when the first clamping part 2111 clamps the workpiece, the leveling driving piece 430 drives the leveling arm to rotate to drive the workpiece to rotate, adjusts the angle between the printing surface of the workpiece and the screen printing plate, and makes the printing surface of the workpiece parallel to the screen printing plate. Specifically, the rack 100 is provided with a rotating shaft 410, and the leveling arm rotates around the rotating shaft 410.

[0059] Further, the first clamping tool 210 further comprises a limiting assembly, which comprises a first fixed block 441, a limiting structure 440, and a second fixed block 442. The first fixed block 441 is fixedly connected with the leveling arm, the second fixed block 442 is fixedly connected with the rack 100, and the first fixed block 441 and the second fixed block 442 are connected through the limiting structure 440 to limit the swinging of the leveling arm along the first direction. In the embodiment, the limiting assembly is arranged at the end of the leveling arm away from the rotating shaft 410, so as to further limit the swinging of the leveling arm along the axis direction of the rotating shaft 410.

[0060] Specifically, the leveling arm comprises a first arm rod 421, a second arm rod 422, and a third arm rod 423 connected in sequence. The first arm rod 421 is hingedly connected with the rotating shaft 410, the second arm rod 422 is hingedly connected with the leveling driving member 430, and the third arm rod 423 is connected with the limiting assembly. The two ends of the third arm rod 423 are symmetrically provided with the limiting assembly. In combination with the drawings, two first clamping portions 2111 are arranged on the first arm rod 421 and the third arm rod 423 respectively, and the first arm rod 421 and the third arm rod 423 are arranged in parallel with each other to form a cavity for accommodating the feeding mechanism.

[0061] In some embodiments, the limiting structure 440 comprises a limiting sliding seat 445 and a limiting guide structure. It can be understood that, when the leveling arm rotates, the limiting sliding seat 445 slides along the limiting guide structure to compensate for the distance change between the first fixed block 441 and the second fixed block 442. In the embodiment, the limiting guide structure is arranged as a limiting sliding rail 444, which is rotatably connected with the first fixed block 441, and the limiting sliding seat 445 is rotatably connected with the second fixed block 442. Specifically, the limiting assembly further comprises a connecting block 443, and the limiting sliding rail 444 is rotatably connected with the first fixed block 441 through the connecting block 443.

[0062] In other embodiments, the limiting structure 440 comprises a second connecting rod and a third connecting rod hingedly connected with each other. The second connecting rod is hingedly connected with the first fixed block 441, and the third connecting rod is hingedly connected with the second fixed block 442. When the leveling arm rotates, the first fixed block 441 moves relative to the second fixed block 442, and drives the second connecting rod and the third connecting rod to swing to compensate for the distance change between the first fixed block 441 and the second fixed block 442. It can be understood that the limiting structure 440 can also be arranged as a connecting rod with a length changeable through extension and contraction, and the connecting rod is hingedly connected with the first fixed block 441 and the second fixed block 442 respectively.

[0063] In this embodiment, the screen printing equipment further comprises a visual positioning assembly and a control assembly, the visual positioning assembly is arranged at the pretreatment station 102, and visual identification is performed on the workpiece to prepare for the hot stamping process, and the visual positioning assembly is electrically connected with the control assembly. Specifically, the control assembly is also electrically connected with the feeding driving mechanism, the grabbing driving mechanism, the clamping driving mechanism, the leveling driving piece 430, the lifting driving piece, and the feeding driving piece, so as to control the actions of the feeding mechanism and the clamping mechanism, and further improve the automation degree of the screen printing equipment and the cooperation between the processes.

[0064] The screen printing equipment disclosed by the application is especially suitable for processing of special-shaped products. When the printing surface of the special-shaped product has a taper, the first clamping tool 210 of the hot stamping station 101 can level the printing surface, and at the same time, ensure that the printing surface of the workpiece after leveling is higher than that of the workpiece in the previous station, so as to avoid interference between the hot stamping process and the previous process, ensure the printing quality of the special-shaped product, and avoid printing defects such as blurring and repeated printing.

[0065] The application also relates to a screen printing method, which is implemented based on the screen printing equipment described above, and the screen printing method comprises the following steps:

[0066] The feeding assembly 310 grabs the workpiece at the feeding station, the first feeding assembly 320 grabs the workpiece at the pretreatment station 102, and the discharging assembly 330 grabs the workpiece at the hot stamping station 101.

[0067] The feeding driving mechanism is started, the feeding assembly 310 moves to the next station in the first direction, the first feeding assembly 320 moves to the hot stamping station 101 in the first direction, and the discharging assembly 330 moves to the discharging station in the first direction, and at the same time, the two first grabbing pieces 313 are reversely and synchronously flipped to realize feeding and discharging.

[0068] The second clamping tool 220 clamps the workpiece at the pretreatment station 102, and the first clamping tool 210 clamps the workpiece at the hot stamping station 101.

[0069] The feeding driving mechanism is started, the feeding assembly 310 moves to the next station in the first direction, the first feeding assembly 320 moves to the hot stamping station 101 in the first direction, and the discharging assembly 330 moves to the discharging station in the first direction, and at the same time, the two first grabbing pieces 313 are reversely and synchronously flipped to realize feeding and discharging.

[0070] In some embodiments, the grabbing driving mechanism and the feeding driving mechanism are spaced for operation. When the feeding driving mechanism is started, the grabbing driving mechanism is paused and maintains the grabbing or releasing state of the workpiece; when the feeding driving mechanism is paused, the grabbing driving mechanism is started to grab the workpiece or release the workpiece.

[0071] It can be understood that when the screen printing device has the third clamping tool 230 and the second feeding assembly 340, the clamping driving mechanism drives the third clamping tool 230 to operate synchronously with the first clamping tool 210 and the second clamping tool 220, and the feeding driving mechanism drives the second feeding assembly 340 to operate synchronously with the feeding assembly 310, the unloading assembly 330 and the first feeding assembly 320.

[0072] The content according to the present application is described in detail below with a specific embodiment that a workpiece completes processing in the screen printing device. It should be noted that the following description is only exemplary and is not a specific limitation of the invention.

[0073] The feeding driving member is started, the feeding conveyor belt transports the workpiece to the positioning structure 510, the first grabbing member 313 of the feeding assembly 310 grabs the workpiece, the lifting driving member is started, drives the lifting seat 312 to move upward along the first moving seat 311, and drives the first grabbing member 313 and the workpiece to rise;

[0074] The feeding driving member 121 is started, the synchronous belt 122 drives the first moving seat 311 to move in the first direction, the turnover sliding block 317 slides in the feeding sliding groove 112, drives the guide sliding block 316 and the first connecting rod 314 to descend, the first swing arm 315 swings and drives the first grabbing member 313 to rotate, so that the workpiece is switched from the upright state to the horizontal state, and is transported to the third clamping tool 230;

[0075] The clamping driving mechanism is started, the third movable part 231 drives the third clamping part 2311 to approach the workpiece to clamp and implement dust removal, at the same time, the first grabbing member 313 releases the workpiece, the feeding driving member 121 drives the third moving seat 341 to move in the opposite direction of the first direction through the synchronous belt 122, and is reset to the surface treatment station 103;

[0076] After the dust removal is completed, the grabbing driving mechanism is started, the third grabbing member 342 grabs the workpiece, the third movable part 231 drives the third clamping part 2311 to move away from the workpiece, the feeding driving member 121 is started, the synchronous belt 122 drives the third moving seat 341 and the workpiece to move in the first direction, and transports the workpiece to the pretreatment station 102;

[0077] The clamping driving mechanism is started, the second movable part 221 drives the second clamping part 2211 to approach the workpiece to clamp and implement positioning identification, the third grabbing member 342 releases the workpiece, the feeding driving member 121 drives the second moving seat 321 to move in the opposite direction of the first direction through the synchronous belt 122, and is reset to the pretreatment station 102;

[0078] After the positioning and recognition are completed, the grabbing driving mechanism is started, the second grabbing part 322 grabs the workpiece, the second movable part 221 drives the second clamping part 2211 to move away from the workpiece, the feeding driving part 121 is started, the synchronous belt 122 drives the second moving seat 321 and the workpiece to move in the first direction, and the jacking slider slides in the jacking sliding groove 111 to drive the workpiece to rise, so that the workpiece is transported to the hot stamping station 101;

[0079] The clamping driving mechanism is started, the first movable part 211 drives the first clamping part 2111 to move close to the workpiece to clamp the workpiece, the second grabbing part 322 releases the workpiece, the leveling driving part 430 is started, the workpiece is leveled according to the result of the positioning and recognition, the feeding driving part 121 drives the first moving seat 311 of the discharging assembly 330 to move in the reverse direction of the first direction through the synchronous belt 122, and the first moving seat 311 is reset to the hot stamping station 101;

[0080] After the hot stamping is completed, the grabbing driving mechanism is started, the first grabbing part 313 of the discharging assembly 330 grabs the workpiece, the first movable part 211 drives the first clamping part 2111 to move away from the workpiece, the feeding driving part 121 is started, the synchronous belt 122 drives the first moving seat 311 and the workpiece to move in the first direction, the turnover slider 317 slides in the discharging sliding groove 113, drives the guide slider 316 and the first connecting rod 314 to rise, the first rocker arm 315 swings to drive the first grabbing part 313 to rotate, the workpiece is switched from the horizontal state to the vertical state, the first grabbing part 313 releases the workpiece, and the workpiece moves away from the feeding mechanism to complete the discharging.

[0081] In the description of the present specification, if the description of the reference terms "one embodiment", "some examples", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" appears, it means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner without departing from the purpose of the present application.

[0082] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. A screen printing apparatus, characterized by, The screen printing equipment has a feeding station, a pretreatment station (102), a hot stamping station (101), a discharging station, and comprises: a rack (100); a feeding mechanism, the feeding mechanism comprising a feeding assembly (310), a first feeding assembly (320), and a discharging assembly (330), the feeding assembly (310), the first feeding assembly (320), and the discharging assembly (330) moving synchronously, the feeding assembly (310) comprising a grabbing assembly, the grabbing assembly comprising a first moving seat (311), a first grabbing piece (313), a turnover sliding block (317), and a turnover guide structure, the turnover sliding block (317) being connected with the first grabbing piece (313), the first grabbing piece (313) being hingedly connected with the first moving seat (311), when the first moving seat (311) moves in a first direction, the turnover sliding block (317) slides along the turnover guide structure, driving the first grabbing piece (313) to turn over along the first moving seat (311), the discharging assembly (330) also comprising a grabbing assembly, the first grabbing pieces (313) of the two grabbing assemblies rotating reversely and synchronously; a feeding driving mechanism connected with the first moving seat (311); a clamping mechanism comprising a first clamping tool (210) and a second clamping tool (220), the first clamping tool (210) being arranged at the hot stamping station (101), the second clamping tool (220) being arranged at the pretreatment station (102), the first clamping tool (210) and the second clamping tool (220) clamping or relaxing synchronously; the feeding mechanism comprising a turnover guide plate, the turnover guide structure being provided as a turnover sliding groove, the turnover sliding groove being formed in the turnover guide plate, the height of the two ends of the turnover sliding groove being different, when the first moving seat (311) drives the turnover sliding block (317) to move in a first direction, the turnover sliding block (317) rises or falls in the turnover sliding groove.

2. The screen printing apparatus of claim 1, wherein: the grabbing assembly further comprising a turnover transmission structure, the turnover sliding block (317) being connected with the first grabbing piece (313) through the turnover transmission structure, the turnover transmission structure comprising a first connecting rod (314) and a first rocker arm (315), the turnover sliding block (317) being rotatably connected with the first connecting rod (314), one end of the first rocker arm (315) being rotatably connected with the first connecting rod (314), and the other end being fixedly connected with the first grabbing piece (313), the turnover sliding block (317) driving the first rocker arm (315) to rotate through the first connecting rod (314), and further driving the first grabbing piece (313) to turn over.

3. The screen printing apparatus of claim 1, wherein: The first clamping tool (210) clamps the printing surface of the workpiece higher than the second clamping tool (220) clamps the printing surface of the workpiece, and the first feeding assembly (320) comprises a second moving seat (321) and a second grabbing piece (322), the second grabbing piece (322) is in sliding connection with the second moving seat (321), when the second moving seat (321) moves in the first direction, the second grabbing piece (322) rises to transfer the workpiece to the first clamping tool (210).

4. The screen printing apparatus of claim 3, wherein: The first feeding assembly (320) further comprises a jacking slider and a jacking guide structure, the jacking slider is fixedly connected with the second grabbing piece (322), and the jacking slider is in sliding connection with the second moving seat (321), when the second moving seat (321) moves in the first direction, the jacking slider slides along the jacking guide structure to drive the second grabbing piece (322) to rise.

5. The screen printing apparatus of claim 4, wherein: The jacking guide structure is provided as a jacking sliding groove (111), the feeding mechanism comprises a jacking guide plate, the jacking sliding groove (111) is formed in the jacking guide plate, and the heights of two ends of the jacking sliding groove (111) are different, when the second moving seat (321) drives the jacking slider to move in the first direction, the jacking slider rises in the jacking sliding groove (111).

6. The screen printing apparatus according to any one of claims 1 to 5, characterized by: The first clamping tool (210) comprises a leveling arm and a leveling driving piece (430), the leveling arm is hingedly installed on the rack (100), the leveling driving piece (430) is hinged to the leveling arm, and the leveling driving piece (430) drives the leveling arm to rotate to drive the workpiece to rotate, so as to adjust the angle between the printing surface and the screen printing plate.

7. The screen printing apparatus of claim 6, wherein: The first clamping tool (210) further comprises a limiting assembly, the limiting assembly comprises a first fixed block (441), a limiting structure (440) and a second fixed block (442), the first fixed block (441) is fixedly connected with the leveling arm, the second fixed block (442) is fixedly connected with the rack (100), and the first fixed block (441) and the second fixed block (442) are connected through the limiting structure (440) to limit the leveling arm from shaking in the first direction.

8. The screen printing apparatus of claim 7, wherein: The limiting structure (440) comprises a limiting sliding seat (445) and a limiting guide structure, the limiting sliding seat (445) is in sliding connection with the limiting guide structure, when the leveling arm rotates, the limiting sliding seat (445) slides along the limiting guide structure to compensate the distance change between the first fixed block (441) and the second fixed block (442).

9. A screen printing method, carried out on the basis of a screen printing apparatus as claimed in any one of claims 1 to 8, characterized in that Comprise: The upper feeding assembly (310) grabs the workpiece at the upper feeding station, the first feeding assembly (320) grabs the workpiece at the pretreatment station (102), and the lower feeding assembly (330) grabs the workpiece at the hot stamping station (101); The feeding driving mechanism is started, the feeding assembly (310) moves to the next work station along the first direction, the first feeding assembly (320) moves to the hot stamping work station (101) along the first direction, the discharging assembly (330) moves to the discharging work station along the first direction, and the two first grabbing pieces (313) are reversely and synchronously flipped to realize feeding and discharging; The second clamping tool (220) clamps the work piece at the pre-treatment work station (102), and the first clamping tool (210) clamps the work piece at the hot stamping work station (101); The feeding driving mechanism is started, the feeding assembly (310) moves to the next work station along the first direction, the first feeding assembly (320) moves to the hot stamping work station (101) along the first direction, the discharging assembly (330) moves to the discharging work station along the first direction, and the two first grabbing pieces (313) are reversely and synchronously flipped to realize feeding and discharging; The feeding driving mechanism is started, the feeding assembly (310) moves to the next work station along the first direction, the first feeding assembly (320) moves to the hot stamping work station (101) along the first direction, the discharging assembly (330) moves to the discharging work station along the first direction, and the two first grabbing pieces (313) are reversely and synchronously flipped to realize feeding and discharging; The feeding driving mechanism is started, the feeding assembly (310) moves to the next work station along the first direction, the first feeding assembly (320) moves to the hot stamping work station (101) along the first direction, the discharging assembly (330) moves to the discharging work station along the first direction, and the two first grabbing pieces (313) are reversely and synchronously flipped to realize feeding and discharging; The feeding driving mechanism is started, the feeding assembly (310) moves to the next work station along the first direction, the first feeding assembly (320) moves to the hot stamping work station (101) along the first direction, the discharging assembly (330) moves to the discharging work station along the first direction, and the two first grabbing pieces (313) are reversely and synchronously flipped to realize feeding and discharging; The feeding

Images