A screen printing apparatus for packaging printing

Abstract

This utility model discloses a screen printing device for packaging printing, including a frame, a worktable and a gantry frame on the frame, a belt drive assembly on the worktable for conveying the workpiece to be printed, and a screen printing mechanism. The screen printing mechanism includes a mounting base mounted on the gantry frame, the mounting base being fixed to a connecting plate, a mounting frame mounted on the side of the connecting plate, a movable frame mounted on the mounting frame, and a liftable nozzle mounting block mounted on the movable frame. The nozzle mounting block is connected to an ink supply pipe and has several ink nozzles. A rotatable roller-type scraper is mounted below the ink nozzle mounting block. A lifting mechanism is also included, comprising a lifting adjustment assembly and a four-bar linkage assembly. The lifting adjustment assembly drives the four-bar linkage assembly to move up and down, adjusting the height of the screen printing plate below the roller-type scraper. This device has a simple structural design and low manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the technical field of partial improvement design of screen printing machinery, and in particular to a screen printing device for packaging printing. Background Technology

[0002] A screen printing machine mainly consists of ink, a squeegee assembly, a screen printing plate, and a printing table. The substrate passes underneath the screen. Ink passes through the screen printing plate with image areas, while ink does not pass through the mesh openings without image areas. The squeegee forces the ink through the image areas onto the substrate. Currently, the horizontal movement of the squeegee assembly and the height adjustment of the screen printing plate are both adjusted by electric linear elements or cylinders, resulting in a complex machine structure and high manufacturing costs.

[0003] In the prior art, patent CN222780144U discloses a screen printing machine with a drying device. The bottom of the extended frame is provided with a base plate, and an upper baffle is provided above the extended frame. Multiple upper and lower air pipes are provided at equal intervals on the upper and lower ends of the left and right sides of the two extended frames. Multiple linearly distributed exhaust holes are opened on the lower surface of the upper air pipe, and multiple linearly distributed exhaust holes are opened on the upper surface of the lower air pipe. By forming a complete space with the side plate, left side plate, right side plate and base plate, and with the upper and lower air pipes provided on the upper and lower sides of the space, airflow with a certain temperature can be blown onto the upper and lower surfaces of the substrate, making the airflow and temperature on the surface of the substrate more uniform, thereby allowing the ink on the substrate to dry quickly.

[0004] In order to solve one of the above-mentioned problems, this application provides a screen printing apparatus for packaging printing. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a screen printing device for packaging printing, which has a simple structural design and low manufacturing cost.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a screen printing device for packaging printing, comprising a frame, a worktable and a gantry frame on the frame, a belt drive assembly installed on the worktable for conveying the workpiece to be printed, and a screen printing mechanism, wherein the screen printing mechanism includes a mounting base installed on the gantry frame, the mounting base being fixed on a connecting plate, a mounting frame installed on the side of the connecting plate, a second guide rod installed on the mounting frame, a movable frame fitted over the second guide rod, a printhead mounting block that can be raised and lowered installed on the movable frame, an ink supply tube connected to the printhead mounting block and provided with a plurality of ink printheads, and a rotatable roller scraper installed below the ink printhead mounting block;

[0007] The lifting mechanism includes a lifting adjustment assembly and a four-bar linkage assembly. The lifting adjustment assembly includes a fixed base, which is fixed to the first connecting rod of the four-bar linkage assembly. The two ends of the first connecting rod are respectively hinged to a first rocker arm, and the end of the first rocker arm is hinged to a second connecting rod. The second connecting rod is rotatably connected to a second rocker arm. The second rocker arm is hinged to a connecting plate, and the two ends of the connecting plate are respectively hinged to the middle of the first rocker arm. A screen printing plate is installed on the second connecting rod, and the screen printing plate is located below the roller scraper.

[0008] Furthermore, it also includes a drying mechanism, which includes a roller assembly and a protective cover mounted on a workbench. The roller assembly and the belt drive assembly are kept flush, and an infrared lamp is installed inside the protective cover.

[0009] Furthermore, as described above, an air pipe is connected to the outside of the protective cover, which is connected to a fan located inside the frame and blows air into the protective cover.

[0010] Furthermore, the lifting and adjusting assembly described above also includes a counterweight box, which is connected to a fixed base via a first guide rod and a screw.

[0011] Furthermore, as described above, the fixed base is provided with a through hole and a screw hole. A first guide rod is installed in the through hole, and a screw is threaded into the screw hole. Several counterweights are placed in the counterweight box.

[0012] Furthermore, as described above, the second connecting rod consists of two transverse rods and one longitudinal rod. The longitudinal rod is vertically connected between the two transverse rods, and the second rocker arm is hinged to the middle part of the longitudinal rod. The ends of the two transverse rods are respectively hinged to the ends of the first rocker arm.

[0013] Furthermore, as described above, the transverse bar is provided with side grooves, and locking bolts are threaded onto the side grooves. The screen printing plate is clamped between two oppositely arranged side grooves and fixed by several locking bolts.

[0014] Furthermore, as described above, the two ends of the roller scraper are rotatably mounted on the vertical plate via a rotating shaft, and the vertical plate is fixed to both ends of the nozzle mounting block.

[0015] Furthermore, as described above, a hydraulic cylinder is installed on the movable frame, the piston shaft of the hydraulic cylinder is connected to the nozzle mounting block, and the nozzle mounting block and the movable frame are movably connected by a third guide rod.

[0016] Furthermore, as described above, both ends of the movable frame are movably sleeved on the second guide rods, and the two opposing second guide rods are respectively installed on the fixed frame, which is located above the second connecting rod.

[0017] Compared with the prior art, the advantages of this utility model are: the lifting mechanism and screen printing plate of this device have simple structural design and low manufacturing cost, and the entire screen printing operation can be completed quickly when combined with the drying mechanism. Attached Figure Description

[0018] Figure 1 The three-dimensional representation of this utility model Figure 1 ;

[0019] Figure 2 The three-dimensional representation of this utility model Figure 2 ;

[0020] Figure 3 This is an exploded view of the present invention;

[0021] Figure 4 for Figure 3 The main view;

[0022] Figure 5 This utility model is three-dimensional. Figure 3 .

[0023] In the diagram: 1. Lifting mechanism; 11. Lifting adjustment assembly; 111. Counterweight box; 112. Counterweight block; 113. First guide rod; 114. Screw; 115. Fixed seat; 12. Four-bar linkage assembly; 121. First connecting rod; 122. First rocker arm; 123. Second connecting rod; 124. Second rocker arm; 13. Screen printing plate; 2. Screen printing mechanism; 20. Ink supply tube; 21. Connecting plate; 22. Mounting seat; 23. Fixed frame; 24. Second guide rod; 25. Moving frame; 26. Third guide rod; 27. Hydraulic cylinder; 28. Nozzle mounting block; 29. ​​Roller scraper; 3. Drying mechanism; 31. Protective cover; 32. Roller assembly; 33. Air pipe; 4. Frame; 40. Workbench; 41. Gantry frame; 42. Belt drive assembly. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," "set," etc., should be interpreted broadly. For example, when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "installed" on another element, it can be directly installed on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within the two elements.

[0026] Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0028] Reference Figure 1-5As shown, this utility model discloses a screen printing device for packaging printing, comprising a frame 4, a screen printing mechanism 2, and a lifting mechanism 1. The frame 4 is equipped with a worktable 40 and a gantry frame 41. A belt drive assembly 42 is installed on the worktable 40 to transport the workpiece to be printed. The screen printing mechanism 2 includes a mounting base 22 mounted on the gantry frame 41, which is fixed to a connecting plate 21. A mounting frame is installed on the side of the connecting plate 21, and a second guide rod 24 is mounted on the mounting frame. A movable frame 25 is fitted around the second guide rod 24. A liftable nozzle mounting block 28 is mounted on the movable frame 25. An ink supply pipe 20 is connected to the nozzle mounting block 28, which is equipped with several ink nozzles. A rotatable roller scraper 29 is installed below the mounting block 28; the lifting mechanism 1 includes a lifting adjustment component 11 and a four-bar linkage 12. The lifting adjustment component 11 includes a fixed base 115, which is fixed to the first connecting rod 121 of the four-bar linkage 12. The two ends of the first connecting rod 121 are respectively hinged to a first rocker arm 122, and the end of the first rocker arm 122 is hinged to a second connecting rod 123. The second connecting rod 123 is rotatably connected to a second rocker arm 124. The second rocker arm 124 is hinged to a connecting plate 21, and the two ends of the connecting plate 21 are respectively hinged to the middle of the first rocker arm 122. A screen printing plate 13 is installed on the second connecting rod 123, and the screen printing plate 13 is located below the roller scraper 29.

[0029] The screen printing apparatus of this application adjusts the height of the entire screen printing mechanism 2 through the lifting mechanism 1. Specifically, the lifting adjustment component 11 uses its own gravity to drive the four-bar linkage 12 to move and maintain force balance, thereby finely adjusting the height of the screen printing plate 13. The roller squeegee 29 moves in a rolling manner on the screen printing plate 13 and drops the ink dripped from the ink supply tube 20 onto the workpiece to be printed through the screen printing plate 13.

[0030] Furthermore, the screen printing apparatus of this application also includes a drying mechanism 3. The drying mechanism 3 includes a roller assembly 32 and a protective cover 31 mounted on a worktable 40. The roller assembly 32 and the belt drive assembly 42 are kept flush to ensure smooth and continuous conveying. An infrared lamp is installed inside the protective cover 31 and is connected to an external power source for energy saving and high efficiency. Specifically, the roller assembly 32 consists of several rollers arranged side by side. The spindle of the roller is mounted on the worktable 40 via bearings. With the traction of the rear-end equipment, the printed parts on the roller assembly 32 are conveyed backward and dried. An air pipe 33 is also connected to the outside of the protective cover 31. The air pipe 33 is connected to a fan located inside the frame 4 and blows air into the protective cover 31, so that the heat emitted by the infrared lamp is rapidly convected in the form of hot air, ensuring that the drying temperature is within a certain working range.

[0031] Furthermore, the lifting adjustment assembly 11 also includes a counterweight box 111. The counterweight box 111 is connected to a fixed base 115 via a first guide rod 113 and a screw 114. The fixed base 115 is provided with a through hole and a screw hole. The first guide rod 113 is installed in the through hole, and the counterweight box 111 can move along the first guide rod 113. The screw 114 is threadedly connected in the screw hole. By rotating the screw 114, the distance between the counterweight box 111 and the fixed base 115 can be adjusted. Several counterweight blocks 112 are placed inside the counterweight box 111. By changing the weight of the counterweight box 111 and the distance between the counterweight box 111 and the fixed base 115, the torque of the lifting adjustment component 11 can be changed, thereby changing the torque of the first connecting rod 121, which in turn drives the four-bar linkage 12 to move. The position of the connecting plate 21 in the four-bar linkage 12 remains unchanged, and the first rocker arm 122 rotates with the rotation of the first connecting rod 121, causing the second connecting rod 123 to deflect itself and maintain its horizontal state under the hinge of the first rocker arm 122, ensuring that the screen printing plate 13 is in a horizontal position. In addition, the second connecting rod 123 consists of two horizontal rods and one vertical rod. The vertical rod is vertically connected between the two horizontal rods, and the second rocker arm 124 is hinged to the middle part of the vertical rod. The ends of the two horizontal rods are respectively hinged to the ends of the first rocker arm 122. Specifically, the horizontal rods are provided with side grooves, and locking bolts are threadedly connected to the side grooves. The screen printing plate 13 is clamped between the two oppositely arranged side grooves and fixed by several locking bolts.

[0032] Furthermore, the two ends of the roller scraper 29 are rotatably mounted on the vertical plate via rotating shafts. Specifically, the two ends of the rotating shafts are mounted on the vertical plate via bearings. The vertical plate is fixed to both ends of the nozzle mounting block 28 and is generally welded to the nozzle mounting block 28. In addition, a hydraulic cylinder 27 is mounted on the movable frame 25. The piston shaft of the hydraulic cylinder 27 is connected to the nozzle mounting block 28 to maintain and adjust the lifting position of the nozzle mounting block 28. At the same time, the roller scraper 29 contacts the screen printing plate 13 through its own weight / pressure of the hydraulic cylinder 27. The nozzle mounting block 28 and the movable frame 25 are movably connected by a third guide rod 26, which guides the lifting of the nozzle mounting block 28. In addition, the two ends of the movable frame 25 are respectively movably sleeved on the second guide rod 24. The two opposing second guide rods 24 are respectively installed on the fixed frame 23. The fixed frame 23 is located above the second connecting rod 123. The second guide rods 24 guide the movable frame 25. The movable frame 25 can be manually pushed to reciprocate, which is a semi-automatic working state. If it is changed to automatic working, an electric cylinder needs to be installed to drive the movable frame 25 to reciprocate linearly. The electric cylinder is a modular product that integrates the servo motor and the lead screw, converting the rotational motion of the servo motor into linear motion. It is an existing mature component and will not be described in detail here.

[0033] In this utility model device, the assembly and coordination of the various components, the working coordination of the various mechanisms, and the action linkage of the various components are existing technologies or materials. The relevant technical personnel can directly purchase or order them from the market according to the required product model and specifications.

[0034] All electrical components mentioned in the text are connected to an external main controller and 220V AC mains power or industrial power. The main controller can be a conventional known device such as a computer that plays a control role.

[0035] The above description is merely a preferred embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It is obvious to those skilled in the art that this utility model is not limited to the details of the above embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A screen printing device for packaging printing, comprising a frame (4) provided with a workbench (40) and a gantry (41), a belt drive assembly (42) being mounted on the workbench (40) to convey a piece to be printed, characterized in that, It also includes a screen printing mechanism (2), which includes a mounting base (22) installed on a gantry frame (41). The mounting base (22) is fixed on a connecting plate (21). A mounting frame is installed on the side of the connecting plate (21). A second guide rod (24) is installed on the mounting frame. A movable frame (25) is fitted around the second guide rod (24). A printhead mounting block (28) that can be raised and lowered is installed on the movable frame (25). An ink supply tube (20) is connected to the printhead mounting block (28) and a number of ink printheads are provided. A rotatable roller scraper (29) is installed below the ink printhead mounting block (28). The lifting mechanism (1) includes a lifting adjustment assembly (11) and a four-bar linkage assembly (12). The lifting adjustment assembly (11) includes a fixed base (115), which is fixed on the first connecting rod (121) of the four-bar linkage assembly (12). The two ends of the first connecting rod (121) are respectively hinged to a first rocker arm (122). The end of the first rocker arm (122) is hinged to a second connecting rod (123). The second connecting rod (123) is rotatably connected to a second rocker arm (124). The second rocker arm (124) is hinged to a connecting plate (21). The two ends of the connecting plate (21) are respectively hinged to the middle of the first rocker arm (122). A screen printing plate (13) is installed on the second connecting rod (123). The screen printing plate (13) is located below the roller scraper (29).

2. A screen printing device for packaging printing according to claim 1, characterized in that It also includes a drying mechanism (3), which includes a roller assembly (32) and a protective cover (31) mounted on a workbench (40). The roller assembly (32) and the belt drive assembly (42) are kept flush. An infrared lamp is installed inside the protective cover (31).

3. The screen printing apparatus for packaging printing according to claim 2, characterized in that, The protective cover (31) is also connected to an air pipe (33), which is connected to a fan located in the frame (4) and blows air into the protective cover (31).

4. The screen printing apparatus for packaging printing according to claim 1, characterized in that, The lifting adjustment assembly (11) also includes a counterweight box (111), which is connected to a fixed base (115) via a first guide rod (113) and a screw (114).

5. A screen printing apparatus for packaging printing according to claim 4, characterized in that, The fixed base (115) is provided with a through hole and a screw hole. A first guide rod (113) is installed in the through hole, and a screw rod (114) is threaded in the screw hole. Several counterweights (112) are placed in the counterweight box (111).

6. A screen printing apparatus for packaging printing according to claim 1, characterized in that, The second connecting rod (123) consists of two horizontal rods and one vertical rod. The vertical rod is vertically connected between the two horizontal rods, and the second rocker (124) is hinged to the middle part of the vertical rod. The ends of the two horizontal rods are respectively hinged to the ends of the first rocker (122).

7. A screen printing apparatus for packaging printing according to claim 6, characterized in that, The transverse rod is provided with a side groove, and a locking bolt is threaded onto the side groove. The screen printing plate (13) is clamped between two oppositely arranged side grooves and fixed by several locking bolts.

8. A screen printing apparatus for packaging printing according to claim 1, characterized in that, The two ends of the roller scraper (29) are rotatably mounted on the vertical plate via a rotating shaft, and the vertical plate is fixed to both ends of the nozzle mounting block (28).

9. A screen printing apparatus for packaging printing according to claim 8, characterized in that, A hydraulic cylinder (27) is installed on the movable frame (25). The piston shaft of the hydraulic cylinder (27) is connected to the nozzle mounting block (28). The nozzle mounting block (28) and the movable frame (25) are movably connected by a third guide rod (26).

10. A screen printing apparatus for packaging printing according to claim 9, characterized in that, The two ends of the movable frame (25) are respectively movably sleeved on the second guide rod (24), and the two oppositely arranged second guide rods (24) are respectively installed on the fixed frame (23), which is located above the second connecting rod (123).

Images