CN220009128U

CN220009128U - Screen printer

Info

Publication number: CN220009128U
Application number: CN202320940499.9U
Authority: CN
Inventors: 吴斌; 梁天富; 胡青云
Original assignee: Shenfa Mechanical & Electrical Co ltd
Current assignee: Shenfa Mechanical & Electrical Co ltd
Priority date: 2023-04-23
Filing date: 2023-04-23
Publication date: 2023-11-14
Anticipated expiration: 2033-04-23

Abstract

The utility model discloses a screen printer, which comprises a frame, a feeding mechanism and a clamping mechanism, wherein the feeding mechanism is used for transporting a workpiece to be processed, the feeding mechanism comprises a positioning structure, the positioning structure is fixedly connected with the frame, and the positioning structure is abutted with the workpiece; the feeding mechanism comprises a feeding assembly, the feeding assembly comprises a feeding transmission piece and a first grabbing piece, and the first grabbing piece is installed on the feeding transmission piece in a lifting manner; the clamping mechanism comprises a first clamping tool arranged on the frame, and the feeding mechanism moves the workpiece to the clamping mechanism. To the special-shaped product material loading of different specification shapes, the screen printer sets up location structure in feed mechanism department, location structure and work piece butt in order to realize the relative positioning between work piece and the feed mechanism, then the material loading subassembly snatchs the work piece through first snatchs the piece to drive first snatch piece and work piece through the lifting seat and rise, make the work piece break away from location structure and shift to fixture and carry out subsequent processing.

Description

Screen printer

Technical Field

The utility model relates to the technical field of printing equipment, in particular to a screen printer.

Background

The screen printing technology is to pour printing ink on a screen printing plate and then control the pressing of a scraper to enable the screen printing plate to be in contact with the surface of a product to realize printing. In the existing production, in the process of processing special-shaped bottle products, because the specification and shape differences among the special-shaped bottle products are large, the screen printing equipment has the defects of poor applicability and difficulty in positioning and feeding for products with various specifications. In addition, in the running process of the screen printing equipment, the hot stamping station interferes with the previous station, so that the printing quality is affected.

Accordingly, there is a need to provide a screen printer suitable for use in the processing of profiled products.

Disclosure of Invention

In order to solve at least one of the technical problems, the utility model provides a screen printer, which adopts the following technical scheme:

the screen printer comprises a frame, a feeding mechanism and a clamping mechanism, wherein the feeding mechanism is used for conveying a workpiece to be processed, the feeding mechanism comprises a positioning structure, the positioning structure is fixedly connected with the frame, and the positioning structure is abutted with the workpiece; the feeding mechanism comprises a feeding assembly, the feeding assembly comprises a feeding transmission piece and a first grabbing piece, and the first grabbing piece is installed on the feeding transmission piece in a lifting manner; the clamping mechanism comprises a first clamping tool arranged on the frame, and the feeding mechanism moves the workpiece to the clamping mechanism; when the workpiece moves to the positioning structure, the first grabbing piece grabs the workpiece and ascends relative to the feeding transmission piece so as to drive the workpiece to be separated from the positioning structure and transferred to the clamping mechanism.

In some embodiments of the present utility model, the feeding assembly further includes a lifting driving member, and the lifting driving member drives the first grabbing member to ascend or descend.

In some embodiments of the present utility model, the feeding transmission member is provided with a lifting guide structure, and the first grabbing member reciprocates along the lifting guide structure to drive the workpiece to rise or fall.

In some embodiments of the present utility model, the feeding assembly further includes a lifting seat, the first grabbing member is mounted on the lifting seat, and the lifting seat reciprocates along the lifting guiding structure to drive the first grabbing member to rise or fall.

In some embodiments of the present utility model, the positioning structure is installed at one end of the feeding mechanism, which is close to the feeding mechanism, and one end of the positioning structure, which is far away from the feeding mechanism, is opened to form a semi-closed cavity, and the feeding mechanism drives the workpiece to enter the semi-closed cavity until the workpiece abuts against the positioning structure to achieve positioning.

In some embodiments of the present utility model, the clamping mechanism further includes a second clamping tool, and 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.

In some embodiments of the present utility model, the feeding mechanism includes a first feeding assembly, and the first feeding assembly conveys the workpiece to the first clamping tool along a first direction and drives the workpiece to rise.

In some embodiments of the present disclosure, the first feeding assembly includes a first transmission member and a lifting member, where the lifting member is slidably connected to the first transmission member, and the lifting member slides relative to the first transmission member to lift the workpiece when transferring to the first clamping portion.

In some embodiments of the present utility model, the first feeding assembly further includes a lifting slider, the lifting slider is fixedly connected with the lifting member, the frame is provided with a lifting guide structure matched with the lifting slider, and when the first feeding assembly moves towards the first clamping tool along the first direction, the lifting slider moves along the lifting guide structure to drive the lifting member to lift.

In some embodiments of the present utility model, the lifting guide structure is a lifting chute, and the heights at two ends of the lifting chute are different, so as to realize the lifting or descending of the lifting slider, and drive the lifting member to lift or descend.

The embodiment of the utility model has at least the following beneficial effects: to the special-shaped product material loading of different specification shapes, the screen printer sets up location structure in feed mechanism department, location structure and work piece butt in order to realize the relative positioning between work piece and the feed mechanism, then the material loading subassembly snatchs the work piece through first snatchs the piece to drive first snatch piece and work piece through the lifting seat and rise, make the work piece break away from location structure and shift to fixture and carry out subsequent processing.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a clamping mechanism;

FIG. 2 is a schematic view of the clamping mechanism shown in FIG. 1;

FIG. 3 is a schematic view of a frame and a feeding mechanism in the clamping mechanism provided in FIG. 2;

FIG. 4 is a schematic structural view of a first feeding assembly of the feeding mechanism shown in FIG. 3;

fig. 5 is a schematic structural diagram of a feeding assembly in the feeding mechanism provided in fig. 3.

Reference numerals: 100. a frame; 101. a thermoprinting station; 102. a pretreatment station; 103. a surface treatment station; 111. jacking the chute; 210. a first clamping tool; 211. a first movable portion; 2111. a first clamping part; 212. a first fixing portion; 2121. a fourth clamping portion; 220. the second clamping tool; 221. a second movable portion; 2211. a second clamping portion; 230. a third clamping tool; 231. a third movable portion; 2311. a third clamping portion; 310. a feeding assembly; 311. a feeding transmission member; 312. lifting the seat; 313. a first grasping member; 320. a first feed assembly; 321. a first transmission member; 322. a jacking member; 330. a blanking assembly; 340. a second feeding assembly; 500. a first conveyor belt; 510. and a positioning structure.

Detailed Description

Embodiments of the present utility model are described in detail below with reference to fig. 1 through 5, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that, if the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used as directions or positional relationships based on the directions shown in the drawings, the directions are merely for convenience of description and for simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Features defining "first", "second" are used to distinguish feature names from special meanings, and furthermore, features defining "first", "second" may explicitly or implicitly include one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The screen printing technology is to pour printing ink on a screen printing plate and then control the pressing of a scraper to enable the screen printing plate to be in contact with the surface of a product to realize printing. In the existing production, in the process of processing special-shaped bottle products, because the specification and shape differences among the special-shaped bottle products are large, the screen printing equipment has the defects of poor applicability and difficulty in positioning and feeding for products with various specifications. In addition, when the printing surface of the special-shaped bottle product is processed, interference exists among stations, so that the printing quality is influenced.

The utility model relates to a screen printer, which comprises a frame 100, a feeding mechanism and a clamping mechanism, wherein the feeding mechanism is used for conveying a workpiece to be processed, the feeding mechanism comprises a positioning structure 510, the positioning structure 510 is fixedly connected with the frame 100, and the positioning structure 510 is abutted with the workpiece; the feeding mechanism comprises a feeding assembly 310, wherein the feeding assembly 310 comprises a feeding transmission piece 311 and a first grabbing piece 313, and the first grabbing piece 313 is installed on the feeding transmission piece 311 in a lifting manner; the clamping mechanism comprises a first clamping tool 210 mounted on the frame 100, and the feeding mechanism moves the workpiece to the clamping mechanism; when the workpiece moves to the positioning structure 510, the first grabbing member 313 grabs the workpiece, and ascends relative to the feeding driving member 311 to drive the workpiece to be separated from the positioning structure 510 and transferred to the clamping mechanism. The screen printer sets up location structure 510 in feed mechanism department, location structure 510 and work piece butt in order to realize the relative positioning between work piece and the feeding mechanism, then material loading subassembly 310 snatchs the work piece and drive the work piece and rise through first snatch piece 313, makes the work piece break away from location structure 510 and transfer to fixture and carry out subsequent processing.

In some embodiments, the feeding assembly 310 further comprises a lifting drive for driving the first gripping member 313 up along the feeding transmission member 311. Specifically, the lifting driving member is configured as a telescopic cylinder, one end of the telescopic cylinder is connected with the feeding driving member 311, the other end of the telescopic cylinder is connected with the first grabbing member 313, and the telescopic cylinder drives the first grabbing member 313 to ascend or descend.

Further, the feeding driving member 311 is provided with a lifting guide structure, along which the first gripping member 313 reciprocates to achieve lifting or lowering of the workpiece. In particular, the lifting guide structure may be provided in the form of a guide bar, a guide rail, a guide groove, or the like to guide the moving direction of the first grasping member 313. In this embodiment, the lifting guide structure is set as a sliding rail fixed on the feeding transmission member 311.

In some embodiments, the feeding assembly 310 further includes a lifting seat 312, the lifting seat 312 is slidably connected to the feeding transmission member 311, the first grabbing member 313 is mounted on the lifting seat 312, and the lifting seat 312 reciprocates along the lifting guiding structure to drive the first grabbing member 313 to rise or fall. It will be appreciated that when the first gripping member 313 grips the workpiece at the positioning plate, the lifting base 312 drives the first gripping member 313 to lift so as to avoid the workpiece interfering with the positioning plate.

In other embodiments, the feeding assembly 310 includes an extension arm, where the first grabbing member 313 is connected with the feeding transmission member 311 through the extension arm, when the first grabbing member 313 clamps the workpiece at the positioning plate, the extension arm extends in the opposite direction of the first conveying belt 500 to push the workpiece away from the positioning plate, and then the feeding transmission member 311 acts and drives the first grabbing member 313 to rotate to achieve the transfer of the workpiece, so as to achieve the same effect of avoiding interference between the workpiece and the positioning plate.

Referring to the drawings, the positioning structure 510 is installed at one end of the feeding mechanism, which is close to the feeding mechanism, and the positioning structure 510 is relatively fixed with the frame 100, so as to position the workpiece at the positioning structure 510. Specifically, one end of the positioning structure 510 far away from the feeding mechanism is opened to form a semi-closed cavity, and the feeding mechanism drives the workpiece to enter the semi-closed cavity until the workpiece abuts against the positioning structure 510, so that the workpiece is positioned.

In some embodiments, the semi-closed cavity is provided with at least two positioning parts, the two positioning parts are simultaneously abutted with the peripheral wall of the workpiece, the workpiece is prevented from shaking while the workpiece is restrained from following the movement of the feeding mechanism, and the positioning and grabbing of the workpiece by the first grabbing piece 313 can be facilitated. In the embodiment, the cross section of the semi-closed cavity is U-shaped, and the semi-closed cavity is suitable for positioning products with cylindrical bottle bodies; in other embodiments, the cross-section of the semi-enclosed cavity may also be configured in a V-shape or other shape to accommodate different shaped product orientations.

In some of these embodiments, the feed mechanism includes a feed drive and a first conveyor belt 500, the feed drive driving the first conveyor belt 500 to move to transport the workpiece to the feed mechanism. In the present embodiment, the positioning structure 510 is configured as a positioning plate to limit the workpiece from sliding along the first conveyor 500, so that the feeding assembly 310 can accurately grasp the workpiece at the positioning plate and convey the workpiece to the next station.

As can be understood from the drawings, in the present embodiment, the first gripping member 313 is provided in the form of a gripping jaw, gripping of the workpiece is achieved by gripping the peripheral wall of the workpiece, and in other embodiments, the first gripping member 313 may grip the workpiece for conveyance by suction under negative pressure or the like.

With reference to the accompanying drawings, the screen printer is provided with a feeding station, a pretreatment station 102, a hot stamping station 101 and a discharging station, and a feeding mechanism reciprocates among the stations to realize the conveying of workpieces.

Further, the clamping mechanism further comprises a second clamping tool 220, and the second clamping tool 220 is correspondingly arranged at the pretreatment station 102. The printing surface of the workpiece clamped by the first clamping tool 210 is higher than the printing surface of the workpiece clamped by the second clamping tool 220, so that the interference between the working procedure at the second clamping tool 220 and the working procedure at the first clamping tool 210 is avoided. Specifically, the first clamping tool 210 is configured to clamp a workpiece to perform hot stamping, and includes a first clamping portion 2111; the second clamping fixture 220 is used for clamping a workpiece to perform pretreatment, and comprises a second clamping portion 2211, wherein the first clamping portion 2111 and the second clamping portion 2211 are used for clamping the workpiece through end portions in the axial direction of the workpiece. As can be appreciated in conjunction with the figures, the first clamping portion 2111 is disposed higher than the second clamping portion 2211 such that the workpiece at the first clamping fixture 210 is higher than the workpiece at the second clamping fixture 220.

Further, the feed mechanism also includes a first feed assembly 320. It can be appreciated that the first feeding assembly 320 is configured to perform lifting of the workpiece transferred from the second clamping portion 2211 to the first clamping portion 2111, that is, the first feeding assembly 320 conveys the workpiece to the first clamping fixture 210 along the first direction and drives the workpiece to lift. Referring to the drawings, the first feeding assembly 320 includes a first transmission member 321 and a lifting member 322, where the lifting member 322 is slidably connected to the first transmission member 321. In other embodiments, the first feeding assembly 320 further comprises at least one of a guide bar, a guide rail, and a guide groove to limit the sliding direction of the jack 322.

In some embodiments, the first driving member 321 has a lifting slider, the frame 100 is provided with a lifting guide structure matched with the lifting slider, and when the first driving member 321 moves back and forth between the pretreatment station 102 and the hot stamping station 101 along the first direction, the lifting slider slides along the lifting guide structure to drive the lifting member 322 to lift or descend, so as to realize lifting or falling back during workpiece transferring.

Specifically, in combination with the drawings, the lifting guide structure is configured as a lifting chute 111, and the heights of the two ends of the lifting chute 111 are differently configured to realize lifting or lowering of the lifting slider. It can be appreciated that by changing the path of the lifting chute 111, different lifting paths of the first feeding assembly 320 can be limited, so that lifting of the workpiece is more reliable, and step cooperativity between lifting of the workpiece by the first feeding assembly 320 and clamping of the workpiece by the first clamping tool 210 is enhanced. In other embodiments, the lifting member 322 may be configured as a telescoping motor or telescoping cylinder to lift the printing surface of the workpiece.

Further, the first feeding assembly 320 further includes a rolling member, and the rolling member is connected to the lifting slider, and the lifting slider moves in the lifting chute 111 through the rolling member. In this embodiment, the rolling member is configured as a bearing, and the bearing is mounted at the end portion of the jacking slider contacting the jacking chute 111, so as to convert sliding contact into rolling contact, and enhance the synchronism of the movement between the jacking slider and the first transmission member 321. It will be appreciated that the rolling elements may also be provided in the form of rollers or balls or the like to enable the lifting slider to slide more smoothly.

Specifically, the first clamping tool 210 further includes a first movable portion 211, the first clamping portion 2111 is mounted on the frame 100 through the first movable portion 211, and the first clamping portion 2111 is rotatably mounted on the first movable portion 211; the second clamping fixture 220 further includes a second movable portion 221, and the second clamping portion 2211 is mounted on the frame 100 through the second movable portion 221.

In some embodiments, the first clamping tool 210 further includes a first fixing portion 212, the first fixing portion 212 is fixedly connected to the frame 100, the first fixing portion 212 is fixed with a fourth clamping portion 2121, the fourth clamping portion 2121 is rotatably installed on the first fixing portion 212, and the first movable portion 211 drives the first clamping portion 2111 to approach or separate from the fourth clamping portion 2121 so as to clamp or loosen a workpiece. It will be appreciated that the cooperation of the first fixed portion 212 with the first movable portion 211 enables better positioning of the workpiece for printing. Specifically, the first movable portion 211 is provided as a telescopic cylinder, and the first clamping portion 2111 is fixed to a telescopic end of the telescopic cylinder.

In other embodiments, two first movable portions 211 are provided, two first clamping portions 2111 are provided corresponding to the two first movable portions 211, the two first movable portions 211 synchronously drive the two first clamping portions 2111 to approach or separate from each other to clamp or loosen the workpiece, and the two first clamping portions 2111 synchronously rotate to drive the printing surface of the workpiece to rotate. It will be appreciated that the two first clamping portions 2111 are synchronously moved closer to each other to enhance the clamping effect of the first clamping tool 210 on the workpiece at the stamping process. Specifically, the first movable portion 211 may be configured as a telescopic cylinder or a telescopic motor, and directly drives the first clamping portion 2111 to approach or depart from the workpiece; the first movable portion 211 may also be configured as a sliding cylinder mounted on the frame 100, where the sliding cylinder slides relative to the frame 100 to drive the first clamping portion 2111 to approach or separate from the workpiece.

It is understood that the feed mechanism is used to effect the transport of the workpiece between the stations and the clamping mechanism. In this embodiment, the feeding mechanism further includes a blanking assembly 330, the feeding assembly 310 is used for conveying the workpiece from the feeding station to the next station, the first feeding assembly 320 is used for conveying the workpiece from the pretreatment station 102 to the thermoprinting station 101, the blanking assembly 330 is used for conveying the workpiece from the thermoprinting station 101 to the blanking station, and the feeding assembly 310, the first feeding assembly 320 and the blanking assembly 330 move synchronously in the same direction. Specifically, in some embodiments, the feeding assembly 310, the first feeding assembly 320 and the discharging assembly 330 are driven to move synchronously by a screw, and in other embodiments, the feeding assembly 310, the first feeding assembly 320 and the discharging assembly 330 are driven to move synchronously by a synchronous belt. In other embodiments, the feeding mechanism may be driven by a linkage mechanism or other manners to implement the synchronous movement among the feeding assembly 310, the first feeding assembly 320, and the discharging assembly 330.

Further, the screen printer further has a surface treatment station 103, the surface treatment station 103 is correspondingly provided with a third clamping tool 230, the third clamping tool 230 includes a third movable portion 231 and a third clamping portion 2311, the third movable portion 231 is mounted on the frame 100, the third clamping portion 2311 is mounted on the third movable portion 231, and the third movable portion 231 drives the third clamping portion 2311 to approach or separate from the workpiece so as to clamp or loosen the workpiece. Specifically, the third clamping portion 2311 is rotatably installed on the third movable portion 231 to drive the machining surface of the workpiece to rotate, thereby improving the working efficiency of the surface treatment process.

In some of these embodiments, the feed mechanism further includes a second feed assembly 340, the feed assembly 310 transporting the workpiece from the feed station to the surface treatment station 103, and the second feed assembly 340 transporting the workpiece from the surface treatment station 103 to the pretreatment station 102. Specifically, the second feeding assembly 340 includes a second transmission member, and the second transmission member is connected to the feeding assembly 310, the first feeding assembly 320, and the discharging assembly 330, so as to realize synchronous movement of the second feeding assembly 340 and the feeding assembly 310, the first feeding assembly 320, and the discharging assembly 330 in the same direction.

Further, the first movable portion 211, the second movable portion 221 and the third movable portion 231 synchronously move to drive the first clamping portion 2111, the second clamping portion 2211 and the third clamping portion 2311 to synchronously move, so that three workpieces at the hot stamping station 101, the pretreatment station 102 and the surface treatment station 103 are synchronously clamped or loosened, the coordination among the working procedures is enhanced, and the printing efficiency of the screen printer is improved.

It can be appreciated that the screen printer further comprises a control assembly, wherein the control assembly is used for coordinating the action sequence of the clamping mechanism, the feeding mechanism and other components so as to further improve the cooperativity and the working efficiency of each procedure of the screen printer. The screen printer also includes a visual positioning assembly disposed at the pretreatment station 102 for visual identification positioning of the workpiece in preparation for a subsequent stamping process. The visual positioning component is connected with the control component.

In the description of the present specification, if a description appears that makes reference to the term "one embodiment," "some examples," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples," etc., it is intended that the particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. Screen printer, characterized by comprising:

a frame (100);

the feeding mechanism is used for conveying workpieces and comprises a positioning structure (510), the positioning structure (510) is fixedly connected with the frame (100), and the positioning structure (510) is abutted with the workpieces;

the feeding mechanism comprises a feeding assembly (310), the feeding assembly (310) comprises a feeding transmission piece (311) and a first grabbing piece (313), and the first grabbing piece (313) is installed on the feeding transmission piece (311) in a lifting mode;

the clamping mechanism comprises a first clamping tool (210) mounted on the frame (100), and the feeding mechanism moves a workpiece to the clamping mechanism;

when the workpiece moves to the positioning structure (510), the first grabbing piece (313) grabs the workpiece and ascends relative to the feeding transmission piece (311) so as to drive the workpiece to be separated from the positioning structure (510) and move to the clamping mechanism.

2. The screen printer according to claim 1, wherein: the feeding assembly (310) further comprises a lifting driving piece, and the lifting driving piece drives the first grabbing piece (313) to ascend or descend.

3. The screen printer according to claim 2, wherein: the feeding transmission piece (311) is provided with a lifting guide structure, and the first grabbing piece (313) moves back and forth along the lifting guide structure so as to drive the workpiece to ascend or descend.

4. A screen printer according to claim 3, wherein: the feeding assembly (310) further comprises a lifting seat (312), the first grabbing piece (313) is installed on the lifting seat (312), and the lifting seat (312) moves back and forth along the lifting guide structure to drive the first grabbing piece (313) to ascend or descend.

5. The screen printer according to claim 1, wherein: the positioning structure (510) is arranged at one end, close to the feeding mechanism, of the feeding mechanism, one end, far away from the feeding mechanism, of the positioning structure (510) is opened to form a semi-closed cavity, and the feeding mechanism drives a workpiece to enter the semi-closed cavity until the workpiece abuts against the positioning structure (510) to realize positioning.

6. The screen printer according to claim 1, wherein: the clamping mechanism further comprises a second clamping tool (220), and the printing surface of the workpiece clamped by the first clamping tool (210) is higher than the printing surface of the workpiece clamped by the second clamping tool (220).

7. The screen printer according to claim 1 or 6, wherein: the feeding mechanism comprises a first feeding assembly (320), and the first feeding assembly (320) conveys the workpiece to the first clamping tool (210) along a first direction and drives the workpiece to ascend.

8. The screen printer of claim 7, wherein: the first feeding assembly (320) comprises a first transmission part (321) and a jacking part (322), the jacking part (322) is in sliding connection with the first transmission part (321), and the jacking part (322) slides relative to the first transmission part (321) so as to realize jacking of the workpiece when the workpiece is transferred to the first clamping tool (210).

9. The screen printer of claim 8, wherein: the first feeding assembly (320) further comprises a jacking sliding block, the jacking sliding block is fixedly connected with the jacking piece (322), the frame (100) is provided with a jacking guide structure matched with the jacking sliding block, when the first feeding assembly (320) moves towards the first clamping tool (210) along a first direction, the jacking sliding block moves along the jacking guide structure to drive the jacking piece (322) to ascend.

10. The screen printer of claim 9, wherein: the jacking guide structure is arranged as a jacking chute (111), and the heights at two ends of the jacking chute (111) are different to realize the lifting or descending of the jacking sliding block so as to drive the jacking piece (322) to lift or descend.