Middle double-beam screen printing machine

Abstract

The utility model discloses a middle double-beam screen printing machine which comprises a printing table, two cross beams, an ink scraping assembly and a driving mechanism, and a screen printing plate is arranged at the upper end of the printing table. The two cross beams are arranged above the screen printing plate side by side in the front-back direction, an operation space with the width larger than 15 cm is reserved between the cross beam located on the front side and the edge of the front side of the screen printing plate, and an operation space with the width larger than 15 cm is reserved between the cross beam located on the rear side and the edge of the rear side of the screen printing plate. The ink scraping assembly comprises an ink scraping head and an ink scraping machine base, the ink scraping machine base is installed on the two cross beams, and the ink scraping head is located below the two cross beams and installed on the ink scraping machine base; the driving mechanism can drive the ink scraping machine base to move left and right along the beam. According to the centrally-mounted double-beam screen printing machine, the screen printing plate is convenient to assemble, disassemble and clean, the ink scraping machine base is shortened, the weight of the ink scraping assembly is reduced, the load of the driving mechanism is reduced, and the service life of the driving mechanism is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of screen printing equipment, in particular to a centrally mounted double-beam screen printing machine. Background Art

[0002] Double-beam screen printing machines are usually used for screen printing workpieces with a width greater than 1m. Double-beam screen printing machines usually include a printing table, a screen for screen printing, two crossbeams and an ink scraping assembly. The ink scraping assembly includes an ink scraping machine base and an ink scraping head for printing ink. In the prior art double-beam screen printing machines, two crossbeams are usually arranged above the front and rear ends of the printing table. The ink scraping machine base is located between the two crossbeams. The front and rear ends of the ink scraping machine base are slidably mounted on the two crossbeams in a one-to-one correspondence. A driving mechanism for driving the ink scraping machine base to slide is provided on the crossbeams. The ink scraping head is located between the two crossbeams and mounted on the ink scraping machine base. The screen is arranged below the ink scraping head. The width of the screen is adapted to the length of the ink scraping head. The printing table is provided with a material conveying device below the screen. During the screen printing process, the material conveying device sends the workpiece to the bottom of the screen. The driving mechanism drives the ink scraping machine base to move left and right along the crossbeam, driving the ink scraping head to scrape and squeeze the ink on the screen left and right on the screen, so that the ink is printed on the workpiece below the screen to form an image. In the existing double-beam screen printing machine, when the staff loads, unloads and cleans the screen, the two beams will form obstacles, making it inconvenient to load, unload and clean the screen. In addition, the length of the ink scraper base is relatively long, the weight of the entire ink scraper assembly is large, and the driving mechanism has a large workload. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a centrally mounted double-beam screen printing machine, which is convenient for workers to load and unload and clean the screen, and at the same time, can also shorten the length of the ink scraper base, reduce the weight of the entire ink scraper assembly, reduce the workload of the drive mechanism, and help to increase the service life of the drive mechanism.

[0004] According to an embodiment of the utility model, a centrally mounted double-beam screen printing machine comprises a printing table, two crossbeams, an ink scraping assembly and a driving mechanism, wherein a screen for screen printing is detachably provided on the upper end of the printing table, and the width direction of the screen is along the front-to-back direction; two crossbeams are installed on the printing table, and the two crossbeams are arranged side by side above the screen in the front-to-back direction, and the length direction of each crossbeam is along the left-to-right direction, and an operating space with a width of more than 15 cm is reserved between the crossbeam located at the front side and the front edge of the screen, and a width of 0.1 cm is reserved between the crossbeam located at the rear side and the rear edge of the screen The ink scraper assembly comprises an ink scraper head and an ink scraper base, one end of the ink scraper base can be slidably installed on one of the beams, the other end of the ink scraper base can be slidably installed on the other beam, the ink scraper head is located under the two beams, the ink scraper head is installed on the ink scraper base, the front end of the ink scraper head protrudes relative to the beam located on the front side, and the rear end of the ink scraper head protrudes relative to the beam located on the rear side; the driving mechanism is installed on the beam, and the driving mechanism can drive the ink scraper base to move left and right along the beam.

[0005] A center-mounted double-beam screen printing machine according to an embodiment of the utility model has at least the following beneficial effects: in the center-mounted double-beam screen printing machine provided by the utility model, the ink scraper head is arranged below the two cross beams, and the two cross beams can be moved inward to shorten the distance between them. At the same time, the front and rear ends of the ink scraper head can protrude relative to the cross beams so that the length of the ink scraper head can match the width of the screen. With the above-mentioned arrangement, an operating space with a width greater than 15 cm can be reserved between the cross beam located on the front side and the front edge of the screen, and an operating space with a width greater than 15 cm can be reserved between the cross beam located on the rear side and the rear edge of the screen. There is no cross beam obstruction in the operating space, which greatly facilitates the staff to load and unload and clean the screen in the operating space. In addition, since the distance between the two cross beams is shortened, the length of the ink scraper base can also be shortened, thereby reducing the weight of the entire ink scraper assembly, reducing the workload of the drive mechanism, and helping to increase the service life of the drive mechanism.

[0006] According to some embodiments of the utility model, a feeding mechanism and a discharging mechanism are respectively provided on the left and right sides of the printing table, a control device is provided on the front or rear side of the printing table, the printing table includes a base, a material conveying device, and a mounting frame, the material conveying device is provided on the upper side of the base, the mounting frame is installed on the base, the mounting frame is spaced above the material conveying device, a clamping cavity is provided in the mounting frame, the screen is placed in the clamping cavity, wherein at least one first automatic locking device is installed at the left end of the mounting frame, and at least one second automatic locking device is installed at the right end of the mounting frame, and the control device can control all of the first automatic locking devices and all of the second automatic locking devices to lock or unlock the screen.

[0007] According to some embodiments of the utility model, two first manual locking devices are installed at an interval at the left end of the installation frame, and two second manual locking devices are installed at an interval at the right end of the installation frame, and all of the first manual locking devices and all of the second manual locking devices can lock or unlock the screen, wherein the control device is located at the front side of the screen, the distance between the front edge of the installation frame and the front edge of the screen is less than 30 cm, two of the first manual locking devices and two of the second manual locking devices are all located on the front half of the installation frame, and at least one of the first manual locking devices and at least one of the second manual locking devices are in the operating space located at the front side, at least one of the first automatic locking device and at least one of the second automatic locking devices are located in the rear half of the installation frame, and the distance between all of the first manual locking devices and the front edge of the installation frame is less than 100 cm, and the distance between all of the second manual locking devices and the front edge of the installation frame is less than 100 cm.

[0008] According to some embodiments of the utility model, the mounting frame includes a front frame edge, a rear frame edge, a left frame edge and a right frame edge, the left frame edge can be slidably installed between the front frame edge and the rear frame edge, the right frame edge can be slidably installed between the front frame edge and the rear frame edge, the clamping cavity is formed by the front frame edge, the rear frame edge, the left frame edge and the right frame edge, the first manual locking device and the first automatic locking device are installed on the left frame edge, the second manual locking device and the second automatic locking device are installed on the right frame edge, wherein a third manual locking device is arranged between the front frame edge and the left frame edge, a fourth manual locking device is arranged between the front frame edge and the right frame edge, a third automatic locking device is arranged between the rear frame edge and the left frame edge, and a fourth automatic locking device is arranged between the rear frame edge and the right frame edge, and the control device can control the third automatic locking device and the fourth automatic locking device to lock or unlock the screen.

[0009] According to some embodiments of the utility model, a first positioning ruler is provided on the front frame edge, and a first indicating head is connected to the left frame edge. The first indicating head can cooperate with the first positioning ruler to measure and indicate the position of the left frame edge, and the left frame edge contacts and positions the left end of the screen.

[0010] According to some embodiments of the utility model, the front frame edge is provided with a second positioning ruler, the right frame edge is connected to a second indicating head, the second indicating head can cooperate with the second positioning ruler to measure and indicate the position of the right frame edge, and the right frame edge can contact and position the right end of the screen.

[0011] According to some embodiments of the utility model, the front end of the left frame side is slidably installed on the front frame side via a guide rail structure, the rear end of the left frame side is slidably installed on the rear frame side via a guide rail structure, the front end of the right frame side is slidably installed on the front frame side via a guide rail structure, and the rear end of the right frame side is slidably installed on the rear frame side via a guide rail structure.

[0012] According to some embodiments of the utility model, the first manual locking device includes a first mounting plate and a locking bolt, the left end of the first mounting plate is installed on the left frame edge, and the right end is located above the clamping cavity. The first mounting plate is provided with a first mounting hole with a vertical axis, and the locking bolt is screwed into the first mounting hole.

[0013] According to some embodiments of the utility model, the first automatic locking device includes a second mounting plate and a locking cylinder, the left end of the second mounting plate is mounted on the left frame edge, and the right end is provided with a avoidance hole with a vertical axis, the locking cylinder is mounted on the second mounting plate, and the piston rod of the locking cylinder is passed through the avoidance hole.

[0014] According to some embodiments of the present invention, the distance between the two cross beams is d, and the length of the ink scraper head is L, wherein d and L satisfy: 0.4L≤d≤0.7L.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 It is a schematic diagram of a centrally mounted double-beam screen printing machine according to an embodiment of the utility model;

[0018] Figure 2 for Figure 1 A top view of a mid-mounted double-beam screen printing machine is shown;

[0019] Figure 3 for Figure 1 A front view of a mid-mounted double-beam screen printing machine is shown;

[0020] Figure 4 for Figure 1 The enlarged view of point A in the middle;

[0021] Figure 5 for Figure 1 Enlarged view of point B in the middle.

[0022] Reference numerals:

[0023] Printing table 100, base 110, material conveying device 120, mounting frame 130, front frame edge 131, rear frame edge 132, left frame edge 133, right frame edge 134, guide rail structure 135, first positioning ruler 136, first indication head 137, second indication head 138, second positioning ruler 139, screen 200, crossbeam 300, ink scraping assembly 400, ink scraping head 410, ink scraping machine base 420, driving mechanism 500, feeding mechanism 610, discharging mechanism 620, control device 700, first automatic locking device 810, second mounting plate 811, locking cylinder 812, second automatic locking device 820, third automatic locking device 830, fourth automatic locking device 840, first manual locking device 910, first mounting plate 911, locking bolt 912, second manual locking device 920, third manual locking device 930 and fourth manual locking device 940. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] When designing a double-beam screen printing machine, the distance between the beam 300 and the screen 200 in the upper and lower directions is usually less than 40 cm. In the existing double-beam screen printing machine, the beam 300 is set on the front and rear edges of the printing table. When the staff loads, unloads and cleans the screen, the two beams 300 will block the staff's line of sight, limit the staff's operating range, and hinder the staff from loading, unloading and cleaning the screen, making loading, unloading and cleaning the screen 200 very inconvenient.

[0029] Reference Figure 1 and Figure 2According to an embodiment of the utility model, a central double-beam screen printing machine includes a printing table 100, two crossbeams 300, an ink scraping assembly 400 and a driving mechanism 500. A screen 200 for screen printing is detachably provided at the upper end of the printing table 100, and the width direction of the screen 200 is along the front-to-back direction; two crossbeams 300 are installed on the printing table 100, and the two crossbeams 300 are arranged side by side above the screen 200 along the front-to-back direction. The length direction of each crossbeam 300 is along the left-to-right direction. An operating space with a width of more than 15 cm is reserved between the crossbeam 300 located at the front side and the front edge of the screen 200, and a space with a width of more than 15 cm is reserved between the crossbeam 300 located at the rear side and the rear edge of the screen 200. m operating space; the ink scraper assembly 400 includes an ink scraper head 410 and an ink scraper base 420, one end of the ink scraper base 420 can be slidably installed on one of the beams 300, and the other end of the ink scraper base 420 can be slidably installed on the other beam 300, the ink scraper head 410 is located below the two beams 300, the ink scraper head 410 is installed on the ink scraper base 420, the front end of the ink scraper head 410 protrudes relative to the beam 300 located on the front side, and the rear end of the ink scraper head 410 protrudes relative to the beam 300 located on the rear side; the driving mechanism 500 is installed on the beam 300, and the driving mechanism 500 can drive the ink scraper base 420 to move left and right along the beam 300.

[0030] In the central double-beam screen printing machine provided by the present invention, the ink scraper head 410 is arranged below the two cross beams 300. The two cross beams 300 can be moved inward to shorten the distance between them. At the same time, the front and rear ends of the ink scraper head 410 can protrude relative to the cross beams 300 so that the length of the ink scraper head 410 can match the width of the screen 200. With the above arrangement, an operating space with a width of more than 15 cm can be reserved between the cross beam 300 located on the front side and the front edge of the screen 200, and an operating space with a width of more than 15 cm can be reserved between the cross beam 300 located on the rear side and the rear edge of the screen 200. There is no obstruction of the cross beam 300 in the operating space, which greatly facilitates the staff to load and unload and clean the screen 200 in the operating space. In addition, since the distance between the two cross beams 300 is shortened, the length of the ink scraper base 420 can also be shortened, thereby reducing the weight of the entire ink scraper assembly 400 and reducing the workload of the drive mechanism 500, which is beneficial to increasing the service life of the drive mechanism 500 and reducing maintenance costs.

[0031] According to some embodiments of the utility model, the distance between the two cross beams 300 is d, and the length of the ink scraper head 410 is L, wherein d and L satisfy: 0.4L≤d≤0.7L. The above-mentioned setting method is adopted to ensure that the connection position between the ink scraper base 420 and the ink scraper head 410 can be within the length position range of the ink scraper head 4100.4L to 0.7L, so as to avoid the length of the ink scraper head 410 hanging at both ends being too long, thereby ensuring the stability of the ink scraper head 410 during the ink scraping process and ensuring stable printing.

[0032] Reference Figures 1 to 3 According to some embodiments of the utility model, a feeding mechanism 610 and a discharging mechanism 620 are respectively provided on the left and right sides of the printing table 100, a control device 700 is provided on the front or rear side of the printing table 100, the printing table 100 includes a base 110, a material conveying device 120, and a mounting frame 130, the material conveying device 120 is arranged on the upper side of the base 110, the mounting frame 130 is installed on the base 110, the mounting frame 130 is arranged above the material conveying device 120 at intervals, a clamping cavity is provided in the mounting frame 130, the screen 200 is placed in the clamping cavity, wherein at least one first automatic locking device 810 is installed at the left end of the mounting frame 130, and at least one second automatic locking device 820 is installed at the right end of the mounting frame 130, and the control device 700 can control all of the first automatic locking devices 810 and all of the second automatic locking devices 820 to lock or unlock the screen 200. Thus, the staff can control the first automatic locking device 810 and the second automatic locking device 820 to lock or unlock the screen 200 by operating the control device 700, and the loading, unloading and cleaning of the screen 200 can be carried out in the avoidance space on the front or rear side of the screen 200, so that the feeding mechanism 610 and the discharging mechanism 620 will not hinder the loading, unloading and cleaning of the screen 200.

[0033] In the central double-beam screen printing machine provided by the utility model, the feed mechanism 610 can provide the workpiece to the material conveying device 120, and then the workpiece is conveyed to the bottom of the installation frame 130 by the material conveying device 120. At this time, the workpiece is just below the screen 200. When screen printing is performed, the drive mechanism 500 drives the ink scraper base 420 to move left and right along the two cross beams 300, thereby driving the ink scraper head 410 to scrape and squeeze the ink on the screen 200 left and right inside the screen 200, thereby printing the ink on the workpiece below the screen 200 to form an image.

[0034] In the specific implementation process, the center-mounted double-beam screen printing machine has different clamping accuracy requirements for the screen 200 according to the different requirements of the workpiece to be screen-printed.

[0035] For occasions where the clamping accuracy requirements for the screen 200 are low, the screen 200 can be locked only by the automatic locking device. Specifically, the left end of the screen 200 can be completely locked by more than two first automatic locks, and the right end of the screen 200 can be completely locked by more than two second automatic locks. With this setting, it is very convenient to load and unload the screen 200.

[0036] In the case where the clamping accuracy of the screen 200 is required to be high, if the screen 200 is locked only by multiple automatic locking devices, it is difficult to ensure that all the first automatic locking devices 810 and all the second automatic locking devices 820 contact the screen 200 at the same time and then lock the screen 200, and the clamping position of the screen 200 may be offset, resulting in low clamping accuracy of the screen 200. Figure 2 , Figure 4 and Figure 5In some embodiments, two first manual locking devices 910 are installed at a distance from each other at the left end of the installation frame 130, and two second manual locking devices 920 are installed at a distance from each other at the right end of the installation frame 130. All of the first manual locking devices 910 and all of the second manual locking devices 920 can lock or unlock the screen 200. The control device 700 is located at the front side of the screen 200, and the distance between the front edge of the installation frame 130 and the front edge of the screen 200 is less than 30 cm. The two first manual locking devices 910 and the two second manual locking devices 920 are installed at a distance from each other at the left end of the installation frame 130. The locking devices 920 are all located on the front half of the installation frame 130, and one of the first manual locking devices 910 and one of the second manual locking devices 920 are in the operating space located on the front side, at least one of the first automatic locking devices 810 and at least one of the second automatic locking devices 820 are located in the rear half of the installation frame 130, and the distance between all of the first manual locking devices 910 and the front edge of the installation frame 130 is less than 100 cm, and the distance between all of the second manual locking devices 920 and the front edge of the installation frame 130 is less than 100 cm. With the above arrangement, during the process of clamping the screen 200, the staff can first use the first manual locking device 910 and the second manual locking device 920 to preliminarily lock the screen 200. During the process of preliminarily locking the screen 200, the staff can operate the first manual locking device 910 and the second manual locking device 920 at any time to accurately adjust the clamping position of the screen 200, and then control all the first automatic locking devices 810 and all the second automatic locking devices 820 to complete the final locking, so as to avoid the situation where the screen 200 is offset due to inconsistent actions of all the first automatic locking devices 810 and all the second automatic locking devices 820, thereby ensuring high clamping accuracy of the screen 200. Among them, the staff can operate all the first manual locking devices 910, all the second manual locking devices 920 and the control device 700 at the front side of the installation frame 130, without the need for the staff to go to the back side of the installation frame 130 or other positions, which is convenient for loading and unloading the screen 200. In addition, for a screen 200 with a width of more than 1.5m, the left and right ends of the screen 200 usually require more than three locking devices for locking. Compared with the method of using all manual locking, the utility model uses a combination of manual locking and automatic locking, so that the staff can operate all the manual locking devices only on the front side of the screen 200, and can also operate the control device 700 to control the operation of the automatic locking device on the other side. Therefore, while ensuring the clamping accuracy of the screen 200, the speed of loading and unloading the screen 200 can be increased, making the loading and unloading of the screen 200 convenient.

[0037] In the specific implementation process, the specific number of the first automatic locking device 810 and the second automatic locking device 820 needs to be determined according to the width of the screen 200. Figure 2 As shown, for a screen 200 with a larger width, such as a screen 200 with a width of more than 1.5 meters, more than two first automatic locking devices 810 and second automatic locking devices 820 can be configured at the rear half of the installation frame 130, a first automatic locking device 810 can be configured between two first manual locking devices 910, and a second automatic locking device 820 can be configured between two second manual locking devices 920. It is conceivable that for a screen 200 with a smaller width, such as a screen 200 with a width of less than 1.5 meters, only one first automatic locking device 810 and second automatic locking device 820 can be configured at the rear half of the installation frame 130, and no first automatic locking device 810 and second automatic locking device 820 can be configured at the front plate portion of the installation frame 130.

[0038] Reference Figure 2 , Figure 4 and Figure 5According to some embodiments of the present utility model, the installation frame 130 includes a front frame edge 131, a rear frame edge 132, a left frame edge 133 and a right frame edge 134, the left frame edge 133 can be slidably installed between the front frame edge 131 and the rear frame edge 132, the right frame edge 134 can be slidably installed between the front frame edge 131 and the rear frame edge 132, the clamping cavity is formed by the front frame edge 131, the rear frame edge 132, the left frame edge 133 and the right frame edge 134, the first manual locking device 910 and the first automatic locking device 810 are installed on the left frame edge 133, and the second manual locking device 9 20 and the second automatic locking device 820 are installed on the right frame edge 134, wherein a third manual locking device 930 is arranged between the front frame edge 131 and the left frame edge 133, a fourth manual locking device 940 is arranged between the front frame edge 131 and the right frame edge 134, a third automatic locking device 830 is arranged between the rear frame edge 132 and the left frame edge 133, and a fourth automatic locking device 840 is arranged between the rear frame edge 132 and the right frame edge 134, and the control device 700 can control the third automatic locking device 830 and the fourth automatic locking device 840 to lock or unlock the screen 200. When it is necessary to disassemble the screen 200, the first manual locking device 910, the second manual locking device 920, the third manual locking device 930, the fourth manual locking device 940, the first automatic locking device 810, the second automatic locking device 820, the third automatic locking device 830 and the fourth automatic locking device 840 can be unlocked, and then the left frame edge 133 and the right frame edge 134 are pushed outward, and then the screen 200 can be taken out of the clamping cavity; when re-clamping the screen 200, first place the screen 200 between the front frame edge 131 and the rear frame edge 132, and then push the left frame edge 133 and the right frame edge 134 toward the screen 200, wherein the left frame edge 133 and the right frame edge 134 are pushed toward the screen 200, and then the left frame edge 133 and the right frame edge 134 are pushed outward. 134 can contact and position the screen 200, the position of the left frame edge 133 can be adjusted at any time through the third manual locking device 930, and the position of the left frame edge 133 can be adjusted at any time through the fourth manual locking device 940, thereby realizing the left and right clamping position adjustment of the screen 200, and then the staff can operate the first manual locking device 910 and the second manual locking device 920 to initially lock the screen 200, and then control all the first automatic locking devices 810 and all the second automatic locking devices 820 to complete the final locking, wherein, when performing the above operations, the staff only needs to stand in front of the screen 200, and the staff does not need to walk around the screen printing machine to the back of the screen 200. With the above settings, the clamping position of the screen 200 can be adjusted, the clamping accuracy of the screen 200 can be improved, and the screen 200 can be easily loaded and unloaded.

[0039] In a specific implementation process, the front frame edge 131 and the rear frame edge 132 are provided with steps for supporting and positioning the screen 200 , and the front and rear ends of the screen 200 are placed on the corresponding steps.

[0040] Reference Figure 4 According to some embodiments of the utility model, a first positioning ruler 136 is provided on the front frame edge 131, and a first indicating head 137 is connected to the left frame edge 133. The first indicating head 137 can cooperate with the first positioning ruler 136 to measure and indicate the position of the left frame edge 133. The left frame edge 133 contacts and positions the left end of the screen 200. With the above arrangement, the left and right positions of the left frame edge 133 can be measured and indicated by the first indicating head 137 cooperating with the first positioning ruler 136, so as to facilitate the staff to adjust the left and right positions of the left frame edge 133, and the adjustment is more accurate.

[0041] Reference Figure 5 According to some embodiments of the present invention, the front frame edge 131 is provided with a second positioning ruler 139, and the right frame edge 134 is connected with a second indicating head 138, and the second indicating head 138 can cooperate with the second positioning ruler 139 to measure and indicate the position of the right frame edge 134, and the right frame edge 134 can contact and locate the right end of the screen 200. With the above arrangement, the left and right positions of the right frame edge 134 can be measured and indicated by the cooperation of the second indicating head 138 and the second positioning ruler 139, so that the staff can adjust the left and right positions of the right frame edge 134 more accurately.

[0042] Reference Figure 1 , Figure 2 and Figure 4 According to some embodiments of the utility model, the front end of the left frame edge 133 is slidably installed on the front frame edge 131 through the guide rail structure 135, the rear end of the left frame edge 133 is slidably installed on the rear frame edge 132 through the guide rail structure 135, the front end of the right frame edge 134 is slidably installed on the front frame edge 131 through the guide rail structure 135, and the rear end of the right frame edge 134 is slidably installed on the rear frame edge 132 through the guide rail structure 135. The above-mentioned arrangement ensures that the left frame edge 133 and the right frame edge 134 can be accurately moved and adjusted in the left and right directions.

[0043] Reference Figure 4According to some embodiments of the utility model, the first manual locking device 910 includes a first mounting plate 911 and a locking bolt 912. The left end of the first mounting plate 911 is installed on the left frame edge 133, and the right end is located above the clamping cavity. The first mounting plate 911 is provided with a first mounting hole with a vertical axis. The locking bolt 912 is screwed into the first mounting hole. Therefore, the screen 200 located below the locking bolt 912 can be locked or unlocked by tightening or loosening the locking bolt 912. The operation is simple and convenient, and the first manual locking device 910 has a simple structure.

[0044] Of course, the first manual locking device 910 mentioned above may also be set in other ways. For example, the first manual locking device 910 may include a quick clamp. The quick clamp is a clamping tool commonly used in this field, which usually includes a fixed seat, on which a handle and a pressure rod are rotatably mounted, and a pressure head is installed on the pressure rod. The handle and the pressure rod are connected by transmission, and the pressure head can be moved and raised by operating the handle.

[0045] Reference Figure 4 According to some embodiments of the utility model, the first automatic locking device 810 includes a second mounting plate 811 and a locking cylinder 812. The left end of the second mounting plate 811 is mounted on the left frame edge 133, and the right end is provided with a avoidance hole with a vertical axis. The locking cylinder 812 is mounted on the second mounting plate 811, and the piston rod of the locking cylinder 812 is passed through the avoidance hole. Therefore, the staff can control the extension and retraction of the piston rod of the locking cylinder 812 through the control device 700, so that the lower end of the piston rod is close to abutting against the screen 200 or away from the screen 200, thereby locking or unlocking the screen 200.

[0046] Of course, it is conceivable that the first automatic locking device 810 may also be configured in other ways. For example, the locking cylinder 812 may be replaced by a linear motor.

[0047] Reference Figure 4 and Figure 5 It is conceivable that the configuration of the second automatic locking device 820, the third automatic locking device 830, and the fourth automatic locking device 840 is similar to that of the first automatic locking device 810, and will not be described in detail herein.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiment is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiment, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the present purpose.

Claims

1. A mid-mounted double-beam screen printing machine, characterized in that: include: A printing table (100), wherein a screen (200) is detachably provided on the upper end of the printing table (100), and the width direction of the screen (200) is along the front-back direction; Two crossbeams (300) are installed on the printing table (100), the two crossbeams (300) are arranged side by side above the screen (200) in the front-to-back direction, the length direction of each crossbeam (300) is in the left-to-right direction, an operating space with a width greater than 15 cm is reserved between the crossbeam (300) located at the front side and the front edge of the screen (200), and an operating space with a width greater than 15 cm is reserved between the crossbeam (300) located at the rear side and the rear edge of the screen (200); An ink scraper assembly (400) comprises an ink scraper head (410) and an ink scraper base (420), wherein one end of the ink scraper base (420) can be slidably mounted on one of the beams (300) left and right, and the other end of the ink scraper base (420) can be slidably mounted on the other beam (300) left and right, the ink scraper head (410) is located below the two beams (300), the ink scraper head (410) is mounted on the ink scraper base (420), the front end of the ink scraper head (410) protrudes relative to the beam (300) located at the front side, and the rear end of the ink scraper head (410) protrudes relative to the beam (300) located at the rear side; A driving mechanism (500) is installed on the crossbeam (300), and the driving mechanism (500) can drive the ink scraper seat (420) to move left and right along the crossbeam (300).

2. The central double-beam screen printing machine according to claim 1, characterized in that: A feeding mechanism (610) and a discharging mechanism (620) are respectively arranged on the left and right sides of the printing table (100); a control device (700) is arranged on the front side or the rear side of the printing table (100); the printing table (100) comprises a base (110), a material conveying device (120), and a mounting frame (130); the material conveying device (120) is arranged on the upper side of the base (110); the mounting frame (130) is installed on the base (110); and the mounting frame (130) is arranged at intervals on the material conveying device (120). The mounting frame (130) is disposed above the screen (120), a clamping cavity is provided in the mounting frame (130), and the screen (200) is placed in the clamping cavity, wherein at least one first automatic locking device (810) is installed at the left end of the mounting frame (130), and at least one second automatic locking device (820) is installed at the right end of the mounting frame (130), and the control device (700) can control all of the first automatic locking devices (810) and all of the second automatic locking devices (820) to lock or unlock the screen (200).

3. The central double-beam screen printing machine according to claim 2, characterized in that: Two first manual locking devices (910) are installed at intervals on the left end of the installation frame (130), and two second manual locking devices (920) are installed at intervals on the right end of the installation frame (130). All of the first manual locking devices (910) and all of the second manual locking devices (920) are capable of locking or unlocking the screen (200). The control device (700) is located at the front side of the screen (200). The distance between the front edge of the installation frame (130) and the front edge of the screen (200) is less than 30 cm. The two first manual locking devices (910) and the two second manual locking devices (920) are arranged at intervals. ) are all located on the front half of the installation frame (130), and at least one of the first manual locking devices (910) and at least one of the second manual locking devices (920) are in the operating space located at the front side, and at least one of the first automatic locking devices (810) and at least one of the second automatic locking devices (820) are located in the rear half of the installation frame (130), wherein the distance between all of the first manual locking devices (910) and the front edge of the installation frame (130) is less than 100 cm, and the distance between all of the second manual locking devices (920) and the front edge of the installation frame (130) is less than 100 cm.

4. The central double-beam screen printing machine according to claim 3, characterized in that: The installation frame (130) comprises a front frame edge (131), a rear frame edge (132), a left frame edge (133) and a right frame edge (134); the left frame edge (133) can be slidably installed between the front frame edge (131) and the rear frame edge (132); the right frame edge (134) can be slidably installed between the front frame edge (131) and the rear frame edge (132); the clamping cavity is formed by enclosing the front frame edge (131), the rear frame edge (132), the left frame edge (133) and the right frame edge (134); the first manual locking device (910) and the first automatic locking device (810) are installed on the left frame edge (133); the second manual locking device (920) and the first automatic locking device (810) are installed on the left frame edge (133); Two automatic locking devices (820) are installed on the right frame edge (134), wherein a third manual locking device (930) is arranged between the front frame edge (131) and the left frame edge (133), a fourth manual locking device (940) is arranged between the front frame edge (131) and the right frame edge (134), a third automatic locking device (830) is arranged between the rear frame edge (132) and the left frame edge (133), and a fourth automatic locking device (840) is arranged between the rear frame edge (132) and the right frame edge (134), and the control device (700) can control the third automatic locking device (830) and the fourth automatic locking device (840) to lock or unlock the screen (200).

5. The central double-beam screen printing machine according to claim 4, characterized in that: A first positioning ruler (136) is arranged on the front frame edge (131), and a first indicating head (137) is connected to the left frame edge (133). The first indicating head (137) can cooperate with the first positioning ruler (136) to measure and indicate the position of the left frame edge (133). The left frame edge (133) contacts and positions the left end of the screen (200).

6. The central double-beam screen printing machine according to claim 5, characterized in that: The front frame edge (131) is provided with a second positioning ruler (139), and the right frame edge (134) is connected with a second indicating head (138), and the second indicating head (138) can cooperate with the second positioning ruler (139) to measure and indicate the position of the right frame edge (134), and the right frame edge (134) can contact and position the right end of the screen (200).

7. The center-mounted double-beam screen printing machine according to claim 4, characterized in that: The front end of the left frame edge (133) is slidably mounted on the front frame edge (131) via a guide rail structure (135), the rear end of the left frame edge (133) is slidably mounted on the rear frame edge (132) via a guide rail structure (135), the front end of the right frame edge (134) is slidably mounted on the front frame edge (131) via a guide rail structure (135), and the rear end of the right frame edge (134) is slidably mounted on the rear frame edge (132) via a guide rail structure (135).

8. The center-mounted double-beam screen printing machine according to claim 4, characterized in that: The first manual locking device (910) includes a first mounting plate (911) and a locking bolt (912), the left end of the first mounting plate (911) is mounted on the left frame edge (133), and the right end is located above the clamping cavity, the first mounting plate (911) is provided with a first mounting hole with a vertical axis, and the locking bolt (912) is screwed into the first mounting hole.

9. The center-mounted double-beam screen printing machine according to claim 4, characterized in that: The first automatic locking device (810) comprises a second mounting plate (811) and a locking cylinder (812); the left end of the second mounting plate (811) is mounted on the left frame edge (133), and the right end is provided with a avoidance hole with a vertical axis; the locking cylinder (812) is mounted on the second mounting plate (811), and the piston rod of the locking cylinder (812) is inserted into the avoidance hole.

10. The center-mounted double-beam screen printing machine according to claim 1, characterized in that: The distance between the two crossbeams (300) is d, and the length of the ink scraper head (410) is L, wherein d and L satisfy: 0.4L≤d≤0.7L.

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