Screen printing machine capable of preventing plate from sinking

Abstract

The utility model discloses a screen printing machine capable of preventing plates from sinking. The screen printing machine comprises a machine base, a screen printing table, two feeding side tables, a feeding middle table and a material moving mechanism. The screen printing table is arranged on the machine base. The two feeding side tables are arranged on the machine base side by side in the left-right direction in a spaced mode and located behind the screen printing table. The feeding middle table is arranged on the machine base in the front-back direction and located between the two feeding side tables. The material moving mechanism is arranged on the machine base and comprises a workpiece feeding moving table, and the workpiece feeding moving table can move backwards to the position between the two feeding side tables and can move forwards to the screen printing table. When the workpiece feeding moving table forwards conveys plates to the silk-screen printing table and leaves the position between the two feeding side tables, the middles of other plates crossing the two feeding side tables can be supported by the feeding middle table, so that the sinking degree of the middles of the plates during feeding is reduced, the process that the workpiece feeding moving table backwards moves to the two feeding side tables is facilitated, and the feeding efficiency is improved. And the risk that the middle of the plate sinks excessively is avoided.

Description

Technical Field

[0001] The utility model relates to the field of screen printers, and particularly to a screen printer for preventing the sinking of a plate material. Background Art

[0002] In the production process of circuit boards, a screen printing step needs to be carried out using a screen printer. At present, some circuit boards are relatively large in size, so a screen printer for preventing the sinking of a plate material and capable of screen printing large-sized circuit boards is required. Some existing screen printers for preventing the sinking of a plate material include a machine base, a screen printing table, two parallel and spaced feeding side tables, and a workpiece feeding moving table. The plate material to be screen printed is straddled on the two feeding side tables. The workpiece feeding moving table can move between the two feeding side tables to support the movement of the plate material, and then the workpiece feeding moving table drives the plate material to move to the screen printing table for screen printing. The workpiece feeding moving table reciprocates to repeat the transfer of the plate material. Since the distance between the two feeding side tables is relatively wide, if the plate material is a flexible plate material, when the workpiece feeding moving table leaves between the two feeding side tables, the middle part of other plate materials straddled on the two feeding side tables may sink, which may seriously affect the process of the workpiece feeding moving table moving between the two feeding side tables to support the plate material, and even cause the middle part of the plate material to sink excessively and separate from the two feeding side tables. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a screen printer for preventing the sinking of a plate material, which can reduce the risk of the middle part of the plate material sinking during feeding.

[0004] The screen printer for preventing the sinking of a plate material according to an embodiment of the utility model includes: a machine base, a screen printing table, two feeding side tables, a feeding middle table, and a material transferring mechanism. The screen printing table is arranged on the machine base; the two feeding side tables are arranged side by side at intervals in the left-right direction on the machine base, and the feeding side tables are located behind the screen printing table; the feeding middle table is arranged in the front-back direction on the machine base, and the feeding middle table is located between the two feeding side tables; the material transferring mechanism is arranged on the machine base, and the material transferring mechanism includes a workpiece feeding moving table, and the workpiece feeding moving table can move backward between the two feeding side tables and can move forward to the screen printing table.

[0005] The screen printer for preventing the sinking of a plate material according to an embodiment of the utility model has at least the following beneficial effects: when the workpiece feeding moving table conveys the plate material forward to the screen printing table and leaves between the two feeding side tables, the middle part of other plate materials straddled on the two feeding side tables can be supported by the feeding middle table, so as to reduce the degree of sinking of the middle part of the plate material during feeding, facilitate the process of the workpiece feeding moving table moving backward between the two feeding side tables, and avoid the risk of excessive sinking of the middle part of the plate material.

[0006] According to some embodiments of the present utility model, the material transfer mechanism is provided with two workpiece feeding moving tables, and the two workpiece feeding moving tables are respectively arranged on the left and right sides of the feeding intermediate table.

[0007] According to some embodiments of the present utility model, the feeding intermediate table is provided with a conveying mechanism for conveying objects from back to front.

[0008] According to some embodiments of the present utility model, the feeding side table is provided with a first rotation driver and at least two first conveying rotating bodies arranged in the front-back direction, the rotation axis of the first conveying rotating body is arranged in the left-right direction, and the first rotation driver is used to drive the first conveying rotating body to rotate.

[0009] According to some embodiments of the present utility model, the first conveying rotating body includes a connecting shaft and at least two rollers arranged along the connecting shaft, the rollers are fixedly connected to the connecting shaft, and the connecting shaft is rotatably connected to the machine base.

[0010] According to some embodiments of the present utility model, the material transfer mechanism further includes a material transfer seat, a material transfer driver and a feeding lifting driver, the material transfer seat is movably arranged on the machine base in the front-back direction, the material transfer driver is used to drive the material transfer seat to move back and forth, the workpiece feeding moving table is liftably arranged on the material transfer seat, and the feeding lifting driver is used to drive the workpiece feeding moving table to lift.

[0011] According to some embodiments of the present utility model, it further includes two discharging side tables and a discharging intermediate table, the two discharging side tables are arranged side by side at intervals in the left-right direction on the machine base, the discharging side table is located in front of the silk printing table, the discharging intermediate table is arranged in the front-back direction and is located between the two discharging side tables, and the material transfer mechanism further includes a workpiece discharging moving table, and the workpiece discharging moving table can move backward to the silk printing table and can move forward between the two discharging side tables.

[0012] According to some embodiments of the present utility model, the material transfer mechanism is provided with two workpiece discharging moving tables, and the two workpiece discharging moving tables are respectively arranged on the left and right sides of the discharging intermediate table.

[0013] According to some embodiments of the present utility model, the silk printing table includes two silk printing side tables and a silk printing intermediate table, the two silk printing side tables are arranged side by side at intervals on the left and right, the silk printing intermediate table is located between the two silk printing side tables, and a moving table matching position is formed between the silk printing side table and the silk printing intermediate table.

[0014] According to some embodiments of the present utility model, the material transfer mechanism further includes a material transfer base, a material transfer driver, a loading lifting driver, and an unloading lifting driver. The material transfer base is movably disposed on the machine base along the front-rear direction. The material transfer driver is used to drive the material transfer base to move back and forth. The workpiece feeding moving table is disposed on the material transfer base in a liftable manner. The loading lifting driver is used to drive the workpiece feeding moving table to lift. The workpiece discharging moving table is disposed on the material transfer base in a liftable manner. The unloading lifting driver is used to drive the workpiece discharging moving table to lift.

[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0016] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a three-dimensional schematic diagram of a screen printing machine for preventing the sheet material from sagging according to an embodiment of the present utility model;

[0018] Figure 2 is a three-dimensional schematic diagram of a partial structure of a screen printing machine for preventing the sheet material from sagging according to an embodiment of the present utility model;

[0019] Figure 3 is a three-dimensional schematic diagram of a loading side table and a loading intermediate table according to an embodiment of the present utility model;

[0020] Figure 4 is a three-dimensional schematic diagram of a loading intermediate table according to an embodiment of the present utility model;

[0021] Figure 5 is a three-dimensional schematic diagram of a material transfer mechanism according to an embodiment of the present utility model;

[0022] Figure 6 is a three-dimensional schematic diagram of a screen printing module according to an embodiment of the present utility model.

[0023] Reference Signs:

[0024] Machine base 100, supporting wheel frame 110, supporting wheel lifting driver 120;

[0025] Screen printing table 200, screen printing side table 210, screen printing intermediate table 220;

[0026] Loading side table 300, first rotation driver 310, first conveying rotating body 320;

[0027] Loading intermediate table 400, loading conveyor belt 410;

[0028] Material transfer mechanism 500, workpiece feeding mobile table 510, material transfer seat 520, material transfer drive 530, loading lifting drive 540, workpiece discharging mobile table 550, unloading lifting drive 560;

[0029] Unloading side table 600;

[0030] Unloading intermediate table 700;

[0031] Vision module 800;

[0032] Silk screen module 900. Detailed implementation

[0033] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up and down, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0035] In the description of the present invention, "plural" means more than two. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0037] In the production process of circuit boards, a screen printer is required for the screen printing step. Currently, some circuit boards are relatively large in size, so a screen printer that can prevent the sheet material from sagging and is capable of screen printing large-sized circuit boards is needed. Some existing screen printers for preventing the sheet material from sagging include a machine base 100, a screen printing table 200, two side loading tables 300 arranged side by side at intervals, and a workpiece feeding and moving table 510. The sheet material to be screen printed is straddled on the two side loading tables 300. The workpiece feeding and moving table 510 can move between the two side loading tables 300 to support the movement of the sheet material, and then the workpiece feeding and moving table 510 drives the sheet material to move to the screen printing table 200 for screen printing. The workpiece feeding and moving table 510 reciprocates to repeat the transfer of the sheet material. Since the distance between the two side loading tables 300 is relatively wide, if the sheet material is a flexible sheet material, when the workpiece feeding and moving table 510 leaves between the two side loading tables 300, the middle part of other sheet materials straddled on the two side loading tables 300 may sag, which may seriously affect the process of the workpiece feeding and moving table 510 moving between the two side loading tables 300 to support the sheet material, and even cause the middle part of the sheet material to sag excessively and break away from the two side loading tables 300.

[0038] For circuit boards with relatively small sizes on the market, the screen printer can use a belt conveyor to convey the sheet material to the screen printing table 200. However, when the circuit board is relatively large in size, in order to support the sheet material relatively stably, a screen printer that can prevent the sheet material from sagging is usually used for screen printing.

[0039] Refer to Figures 1 to 6 , the screen printer for preventing the sheet material from sagging according to the embodiment of the present invention includes a machine base 100, a screen printing table 200, two side loading tables 300, a middle loading table 400, and a material transfer mechanism 500. The screen printing table 200 is arranged on the machine base 100; the two side loading tables 300 are arranged side by side at intervals in the left-right direction on the machine base 100, and the side loading tables 300 are located behind the screen printing table 200; the middle loading table 400 is arranged in the front-back direction on the machine base 100, and the middle loading table 400 is located between the two side loading tables 300; the material transfer mechanism 500 is arranged on the machine base 100, and the material transfer mechanism 500 includes a workpiece feeding and moving table 510, and the workpiece feeding and moving table 510 can move backward between the two side loading tables 300 and can move forward to the screen printing table 200.

[0040] When the workpiece feeding and moving table 510 conveys the sheet material forward to the screen printing table 200 and leaves between the two side loading tables 300, the middle part of other sheet materials straddled on the two side loading tables 300 can be supported by the middle loading table 400, so as to reduce the degree of sagging of the middle part of the sheet material during loading, facilitate the process of the workpiece feeding and moving table 510 moving backward between the two side loading tables 300, and avoid the risk of excessive sagging of the middle part of the sheet material.

[0041] In an embodiment, the material transfer mechanism 500 is provided with two workpiece feeding and moving platforms 510, which are respectively disposed on the left and right sides of the feeding intermediate platform 400. The two workpiece feeding and moving platforms 510 are respectively disposed on the left and right sides of the feeding intermediate platform 400, which can not only more stably support the sheet material and reduce the risk of left - right unbalanced shaking of the sheet material, but also increase the area for supporting the sheet material, adapt to wider sheet materials, make the material transfer mechanism 500 more stable when conveying the sheet material towards the screen printing table 200, and facilitate the feeding intermediate platform 400 to be set at a central position between the two feeding side platforms 300.

[0042] It can be imagined that there can also be only one workpiece feeding and moving platform 510. In this case, the feeding intermediate platform 400 may not be centered. For example, the feeding intermediate platform 400 may be slightly offset towards one of the feeding side platforms 300, and the workpiece feeding and moving platform 510 may be offset towards the other feeding side platform 300.

[0043] In an embodiment, the feeding intermediate platform 400 is provided with a conveying mechanism for conveying objects from back to front. The provision of the conveying mechanism on the feeding intermediate platform 400 enables the conveying mechanism to support and drive the sheet material to move when the sheet material horizontally enters the two feeding side platforms 300 and the feeding intermediate platform 400, and enables a rolling conveyance to be formed between the feeding intermediate platform 400 and the sheet material, reducing the movement friction between the feeding intermediate platform 400 and the sheet material, thereby reducing the contact wear on the middle part of the sheet material.

[0044] Specifically, the conveying mechanism is a feeding conveyor belt 410, which can convey the sheet material relatively stably, has good stability in supporting the sheet material, and is likely to form a large static friction with the sheet material to reduce the risk of the sheet material sliding. It can be imagined that the conveying mechanism can also be other structures. For example, the conveying mechanism is a roller conveying line or a chain plate conveying line, etc. Those skilled in the art can specifically configure according to actual needs.

[0045] Specifically, the feeding intermediate platform 400 is provided with two feeding conveyor belts 410, and the two feeding conveyor belts 410 are arranged side by side in the left - right direction. The two feeding conveyor belts 410 can jointly support and drive the sheet material to move, and the supporting effect on the sheet material is more stable, further reducing the risk of the middle part of the sheet material sagging. It can be understood that the feeding intermediate platform 400 can also be provided with three or more feeding conveyor belts 410.

[0046] In an embodiment, the loading side table 300 is provided with a first rotation driver 310 and at least two first conveying rotators 320 arranged in the front-rear direction. The rotation axis of the first conveying rotator 320 is arranged in the left-right direction, and the first rotation driver 310 is used to drive the first conveying rotator 320 to rotate. By providing the first conveying rotator 320, when the sheet material enters the loading side table 300 horizontally, the first rotation driver 310 can drive the first conveying rotator 320 to rotate to assist the sheet material in entering the loading side table 300. Moreover, the way that the first conveying rotator 320 rolls and conveys relative to the sheet material can reduce the movement friction between the loading side table 300 and the sheet material, thereby reducing the contact wear on the left and right sides of the sheet material.

[0047] Specifically, the loading side table 300 may include two, three, four or more first conveying rotators 320, and those skilled in the art can specifically configure according to actual needs. The first rotation driver 310 is a motor, which drives the first conveying rotator 320 to rotate by means of chain drive. It can be imagined that the first rotation driver 310 can also be a structure such as an internal combustion engine that outputs rotational power, and drives the first conveying rotator 320 to rotate through belt drive, chain drive or gear drive, etc.

[0048] Specifically, the first rotation driver 310 simultaneously drives the loading conveyor belt 410 to move by means of a sprocket and a transmission shaft, so as to reduce the number of motors and save costs. It can be imagined that the loading conveyor belt 410 and the first conveying rotator 320 can also be driven to rotate by different drivers respectively.

[0049] In an embodiment, the first conveying rotator 320 includes a connecting shaft and a plurality of rollers arranged along the connecting shaft. The rollers are fixedly connected to the connecting shaft, and the connecting shaft is rotatably connected to the machine base 100. The above-mentioned first conveying rotator 320 has a simple structure, is easy to implement, and is convenient for conveying the sheet material. Specifically, the first conveying rotator 320 may include two, three, four or more rollers. It can be imagined that the first conveying rotator 320 can also be other structures. For example, the first conveying rotator 320 is a drum.

[0050] In an embodiment, the material transfer mechanism 500 further includes a material transfer seat 520, a material transfer driver (530) and a loading lifting driver 540. The material transfer seat 520 is movably arranged on the machine base 100 in the front-rear direction. The material transfer driver (530) is used to drive the material transfer seat 520 to move back and forth. The workpiece feeding moving table 510 is liftably arranged on the material transfer seat 520, and the loading lifting driver 540 is used to drive the workpiece feeding moving table 510 to lift.

[0051] When the material transfer mechanism 500 is working, first, the material transfer driver (530) drives the material transfer seat 520 to move backward, driving the workpiece feeding moving table 510 to move between the two loading side tables 300. Subsequently, the loading lifting driver 540 drives the workpiece feeding moving table 510 to rise, so that the workpiece feeding moving table 510 abuts against the sheet material. Then, the material transfer driver (530) drives the material transfer seat 520 to move forward, so that the workpiece feeding moving table 510 and the sheet material thereon move to the screen printing table 200. Subsequently, the loading lifting driver 540 drives the workpiece feeding moving table 510 to descend, and a new cycle is carried out to convey the sheet materials from the loading side tables 300 to the screen printing table 200 one by one. The material transfer mechanism 500 is relatively simple and is not likely to damage the surface of the sheet material.

[0052] Specifically, the material transfer driver (530) is a structure that outputs linear power. For example, it can be a cylinder, an electric cylinder, an oil cylinder, or a linear motor, etc. Those skilled in the art can configure it specifically according to actual needs. The material transfer seat 520 can be movable relative to the machine base 100 in the front-rear direction through a guide pillar and guide sleeve structure or a slide rail and slider structure, etc.

[0053] Specifically, the workpiece feeding moving table 510 can be slidably connected to the material transfer seat 520 in the vertical direction through a guide pillar and guide sleeve or a slide rail and slider structure. At this time, the loading lifting driver 540 can be a structure such as a cylinder, an electric cylinder, or an oil cylinder. By driving the inclined ejector block to move horizontally, the inclined ejector block pushes the workpiece feeding moving table 510 to rise and fall, indirectly driving the workpiece feeding moving table 510 to rise and fall, and making the rise and fall of the workpiece feeding moving table 510 relatively stable. It can be understood that in some embodiments, it can also be that the loading lifting driver 540 directly drives the workpiece feeding moving table 510 to rise and fall.

[0054] In the embodiment, there are also two unloading side tables 600 and an unloading intermediate table 700. The two unloading side tables 600 are arranged side by side at intervals in the left-right direction on the machine base 100. The unloading side table 600 is located in front of the screen printing table 200. The unloading intermediate table 700 is arranged in the front-rear direction and is located between the two unloading side tables 600. The material transfer mechanism 500 further includes a workpiece discharging moving table 550. The workpiece discharging moving table 550 can move backward to the screen printing table 200 and can move forward to between the two unloading side tables 600. After the sheet material is screen-printed on the screen printing table 200, the workpiece discharging moving table 550 moves backward to the screen printing table 200, and then holds the sheet material and moves forward until the workpiece discharging moving table 550 moves between the two unloading side tables 600. At this time, the sheet material straddles the two unloading side tables 600. Due to the existence of the unloading intermediate table 700, when the workpiece discharging moving table 550 leaves between the two unloading side tables 600, the unloading intermediate table 700 can support and block the sagging in the middle of the sheet material, enabling the reciprocating movement of the workpiece discharging moving table 550 to operate normally, and the sheet material will not sag excessively and separate from the two unloading side tables 600.

[0055] Specifically, the blanking side table 600 is provided with a second rotation driver and at least two second conveying rotators arranged in the front-back direction. The rotation axis of the second conveying rotator is arranged in the left-right direction, and the second rotation driver is used to drive the second conveying rotator to rotate. By providing the second conveying rotator, when the sheet material enters the blanking side table 600 horizontally, the second rotation driver can drive the second conveying rotator to rotate to assist the sheet material in entering the blanking side table 600. Moreover, the rolling conveying mode of the second conveying rotator relative to the sheet material can reduce the movement friction between the blanking side table 600 and the sheet material, thereby reducing the contact wear on the left and right sides of the sheet material.

[0056] Specifically, the blanking side table 600 may include two, three, four or more second conveying rotators, and those skilled in the art can specifically configure according to actual needs. The second rotation driver is a motor, which drives the second conveying rotator to rotate through a chain drive. It can be imagined that the second rotation driver can also be a structure that outputs rotational power such as an internal combustion engine, and drives the second conveying rotator to rotate through a belt drive, a chain drive or a gear drive, etc.

[0057] Specifically, the second conveying rotator includes a connecting shaft and a plurality of rollers arranged along the connecting shaft. The rollers are fixedly connected to the connecting shaft, and the connecting shaft is rotatably connected to the machine base 100. The above-mentioned second conveying rotator has a simple structure, is easy to implement, and is convenient for conveying the sheet material. Specifically, the second conveying rotator may include two, three, four or more rollers. It can be imagined that the second conveying rotator can also be other structures. For example, the second conveying rotator is a drum.

[0058] Specifically, the blanking intermediate table 700 is provided with a conveying mechanism for conveying objects from back to front. By providing the conveying mechanism on the blanking intermediate table 700, when the sheet material enters the two blanking side tables 600 and the blanking intermediate table 700 horizontally, the conveying mechanism can support the sheet material and drive the sheet material to move, and form a rolling conveyance between the blanking intermediate table 700 and the sheet material, reducing the movement friction between the blanking intermediate table 700 and the sheet material, thereby reducing the contact wear on the middle part of the sheet material.

[0059] Specifically, the conveying mechanism is a blanking conveyor belt, which can convey the sheet material relatively smoothly, and has good stability in supporting the sheet material. It is easy to form a large static friction with the sheet material to reduce the risk of the sheet material sliding. It can be imagined that the conveying mechanism can also be other structures. For example, the conveying mechanism is a roller conveying line or a chain plate conveying line, etc., and those skilled in the art can specifically configure according to actual needs.

[0060] Specifically, the intermediate blanking table 700 is provided with two blanking conveyor belts, which are arranged side by side in the left-right direction. The two blanking conveyor belts can jointly support and drive the sheet material to move, and the supporting effect on the sheet material is more stable, further reducing the risk of the middle part of the sheet material sagging. It can be understood that the intermediate blanking table 700 can also be provided with three or more blanking conveyor belts.

[0061] Specifically, the second rotation driver drives the blanking conveyor belt to move in the way of a sprocket and a transmission shaft, so as to reduce the number of motors and save costs. It can be imagined that different drivers can also be used to drive the blanking conveyor belt and the second conveying and rotating body to rotate respectively.

[0062] In the embodiment, the material transfer mechanism 500 is provided with two workpiece discharging and moving tables 550, which are respectively arranged on the left and right sides of the intermediate blanking table 700. The two workpiece discharging and moving tables 550 are respectively arranged on the left and right sides of the intermediate blanking table 700, which can not only support the sheet material more stably and reduce the risk of the sheet material shaking left and right unevenly, but also increase the area for supporting the sheet material, adapt to wider sheet materials, make the material transfer mechanism 500 more stable when conveying the sheet material towards the screen printing table 200, and facilitate the intermediate blanking table 700 to be arranged in the middle position between the two blanking side tables 600.

[0063] In the embodiment, the screen printing table 200 includes two screen printing side tables 210 and a screen printing intermediate table 220. The two screen printing side tables 210 are arranged side by side at intervals in the left-right direction. The screen printing intermediate table 220 is located between the two screen printing side tables 210, and a moving table adaptation position is formed between the screen printing side table 210 and the screen printing intermediate table 220. In the above structure, when feeding, the workpiece feeding and moving table 510 directly drives the sheet material into the screen printing table 200. The workpiece feeding and moving table 510 enters the moving table adaptation position between the screen printing intermediate table 220 and the screen printing side table 210 to form a relatively complete supporting surface. At this time, the workpiece feeding and moving table 510 and the two screen printing side tables 210 and the screen printing intermediate table 220 jointly support the sheet material, so that each part of the sheet material can be supported during screen printing, reducing the risk of abnormal screen printing. Similarly, when discharging, the workpiece discharging and moving table 550 enters the moving table adaptation position, so as to directly hold the sheet material and convey it forward to the blanking side table 600.

[0064] Specifically, when the workpiece feeding and moving table 510 enters the moving table adaptation position between the screen printing intermediate table 220 and the screen printing side table 210, the left and right sides of the workpiece feeding and moving table 510 are respectively butted against the screen printing intermediate table 220 and the screen printing side table 210 to form a relatively complete supporting surface, facilitating the support of the sheet material.

[0065] In an embodiment, the workpiece discharging moving table 550 is vertically movably arranged on the material transferring base 520, and the discharging lifting driver 560 is used to drive the workpiece discharging moving table 550 to move up and down. Both the workpiece feeding moving table 510 and the workpiece discharging moving table 550 are vertically movably arranged on the material transferring base 520. When the material transferring base 520 moves back and forth, it can drive both of them to move back and forth at the same time, so that the process of transferring the sheet material conforms to the production rhythm without confusion. When the workpiece feeding moving table 510 moves the sheet material forward to the screen printing table 200, the workpiece discharging moving table 550 synchronously moves the sheet material out of the screen printing table 200, reducing the number of drivers, simplifying the structure of the material transferring mechanism 500, having better usability, and reducing the manufacturing cost of the equipment.

[0066] Specifically, the workpiece discharging moving table 550 may be vertically slidably connected to the material transferring base 520 through a guide pillar and guide sleeve or a slide rail and slider structure, and the discharging lifting driver 560 may adopt a cylinder, an electric cylinder or an oil cylinder, etc., to directly drive the workpiece discharging moving table 550 to move up and down.

[0067] It can be imagined that the material transferring mechanism 500 may also be other structures. For example, the material transferring structure includes a front-back driver and the workpiece feeding moving table 510. The front-back driver drives the workpiece feeding moving table 510 to move back and forth. The workpiece feeding moving table 510 is provided with a suction cup group. When the suction cup group is activated, it can grab and fix the sheet material thereon, so as to move the sheet material from the loading side table 300 to the screen printing table 200, or from the screen printing table 200 to the unloading side table 600. Or the material transferring structure is a multi-axis robotic arm and a suction cup group. The multi-axis robotic arm drives the suction cup group to grab the sheet material at the loading side table 300, and then moves the sheet material to the screen printing table 200 and releases it. At this time, the screen printing table 200 may be an integral screen printing table 200. After the sheet material is screen printed, the multi-axis robotic arm drives the suction cup group to grab the sheet material on the screen printing table 200 again, and drives the sheet material to be placed on the unloading side table 600.

[0068] Specifically, the screen printing machine for preventing the sheet material from sagging further includes a supporting wheel frame 110 and a supporting wheel lifting driver 120. The supporting wheel lifting driver 120 is a cylinder. The supporting wheel lifting driver 120 can drive the supporting wheel frame 110 to move up and down. The supporting wheels are located between the two loading conveyor belts 410. The supporting wheel frame 110 is arranged with a plurality of supporting wheels in the front-back direction, and the rotation axis of the supporting wheels is arranged in the front-back direction. When it is necessary to finely adjust the position of the sheet material left and right, the supporting wheel frame 110 rises until the supporting wheels abut against the sheet material. Subsequently, the supporting wheels can assist in finely adjusting the position of the sheet material left and right, reducing the friction between the sheet material and the loading intermediate table 400. The left and right adjustment of the position of the sheet material can be realized by arranging a side pushing structure at the two loading side tables 300, such as a cylinder and a pushing plate, etc. After the adjustment is completed, the supporting wheel lifting driver 120 can drive the supporting wheel frame 110 to descend to avoid affecting the normal movement of the sheet material.

[0069] Specifically, the screen printing machine for preventing the sheet material from sagging further includes a vision module 800 and a screen printing module 900. The vision module 800 is located above the loading side table 300 and is used for visually detecting the shape and position of the sheet material. The screen printing module 900 is located above the screen printing table 200 and is used for screen printing the sheet material. Specifically, the vision module 800 can be a vision camera or the like.

[0070] Specifically, the screen printing module 900 is provided with an adjustable screen frame and a long handle adjustment component. The user can use the long handle adjustment component to finely adjust the shape, position, etc. of the adjustable screen frame.

[0071] The screen printing machine for preventing the sheet material from sagging according to the present utility model can be applied to the screen printing of the sheet material of a circuit board, and is particularly suitable for the screen printing of the sheet material of a flexible circuit board. It can be understood that the screen printing machine for preventing the sheet material from sagging according to the present utility model can also be used for the printing of ordinary sheet materials, and those skilled in the art can configure it specifically according to actual needs.

[0072] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do 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.

[0073] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A screen printing machine for preventing sheet material from sinking, characterized in that: include: A machine base (100); A screen printing platform (200) is arranged on the machine base (100); Two loading side tables (300) are arranged side by side on the machine base (100) at intervals along the left-right direction, and the loading side tables (300) are located behind the screen printing table (200); A loading intermediate platform (400) is arranged on the machine base (100) along the front-rear direction, and the loading intermediate platform (400) is located between the two loading side platforms (300); A material transfer mechanism (500) is arranged on the machine base (100), and the material transfer mechanism (500) comprises a workpiece feeding movable table (510), and the workpiece feeding movable table (510) can move backward to between the two loading side tables (300) and can move forward to the screen printing table (200).

2. The screen printing machine for preventing sheet material from sinking according to claim 1, characterized in that: The material transfer mechanism (500) is provided with two workpiece feeding movable platforms (510), and the two workpiece feeding movable platforms (510) are respectively arranged on the left and right sides of the loading intermediate platform (400).

3. The screen printing machine for preventing sheet material from sinking according to claim 1, characterized in that: The loading intermediate platform (400) is provided with a conveying mechanism for conveying objects from the back to the front.

4. The screen printing machine for preventing sheet material from sinking according to claim 1, characterized in that: The loading side platform (300) is provided with a first rotating driver (310) and at least two first conveying rotors (320) arranged in the front-to-back direction, the rotating axis of the first conveying rotor (320) is arranged in the left-right direction, and the first rotating driver (310) is used to drive the first conveying rotor (320) to rotate.

5. The screen printing machine for preventing sheet material from sinking according to claim 4, characterized in that: The first conveying rotating body (320) comprises a connecting shaft and at least two rollers arranged along the connecting shaft, the rollers are fixedly connected to the connecting shaft, and the connecting shaft is rotatably connected to the machine base (100).

6. The screen printing machine for preventing sheet material from sinking according to claim 1, characterized in that: The material shifting mechanism (500) further comprises a material shifting seat (520), a material shifting driver (530) and a material loading lifting driver (540); the material shifting seat (520) is movably arranged on the machine base (100) along the front-rear direction; the material shifting driver (530) is used to drive the material shifting seat (520) to move forward and backward; the workpiece feeding movable platform (510) is movably arranged on the material shifting seat (520); and the material loading lifting driver (540) is used to drive the workpiece feeding movable platform (510) to move upward and downward.

7. The screen printing machine for preventing sheet material from sinking according to claim 1, characterized in that: The machine also includes two material unloading side platforms (600) and a material unloading middle platform (700). The two material unloading side platforms (600) are arranged side by side on the machine base (100) at intervals in the left-right direction. The material unloading side platforms (600) are located in front of the screen printing platform (200). The material unloading middle platform (700) is arranged in the front-to-back direction and is located between the two material unloading side platforms (600). The material transfer mechanism (500) also includes a workpiece unloading movable platform (550). The workpiece unloading movable platform (550) can move backward to the screen printing platform (200) and can move forward to between the two material unloading side platforms (600).

8. The screen printing machine for preventing sheet material from sinking according to claim 7, characterized in that: The material transfer mechanism (500) is provided with two workpiece discharging movable platforms (550), and the two workpiece discharging movable platforms (550) are respectively arranged on the left and right sides of the unloading intermediate platform (700).

9. The screen printing machine for preventing sheet material from sinking according to claim 2 or 8, characterized in that: The screen printing platform (200) comprises two screen printing side platforms (210) and a screen printing middle platform (220), the two screen printing side platforms (210) are arranged side by side with a left-right spacing, the screen printing middle platform (220) is located between the two screen printing side platforms (210), and a mobile platform adaption position is formed between the screen printing side platforms (210) and the screen printing middle platform (220).

10. The screen printing machine for preventing sheet material from sinking according to claim 7, characterized in that: The material shifting mechanism (500) further comprises a material shifting seat (520), a material shifting driver (530), a material loading lifting driver (540) and a material unloading lifting driver (560); the material shifting seat (520) is movably arranged on the machine base (100) along the front-rear direction; the material shifting driver (530) is used to drive the material shifting seat (520) to move forward and backward; the workpiece feeding movable platform (510) is movably arranged on the material shifting seat (520); the material loading lifting driver (540) is used to drive the workpiece feeding movable platform (510) to be lifted and lowered; the workpiece discharging movable platform (550) is movably arranged on the material shifting seat (520); and the material unloading lifting driver (560) is used to drive the workpiece discharging movable platform (550) to be lifted and lowered.

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