Table-top type screen printing machine

Abstract

The utility model relates to the technical field of screen printing machines, in particular to a tabletop type screen printing machine which comprises a machine base, a feeding mechanism, an XYR adjusting sliding table, a printing table, two supports, two lifting driving mechanisms, a lifting frame, a screen printing plate assembly, a printing device and a moving driving mechanism. A lead screw lifting end of the turbine lead screw lifter is connected with the lifting frame; the four turbine lead screw lifters of the two lifting driving mechanisms are located at the four corners of the lifting frame correspondingly. Four turbine lead screw lifting drives in the two lifting driving mechanisms synchronously drive the lifting frame to ascend and descend, the lifting stability and precision of the lifting frame and the screen printing plate assembly are improved, and therefore the levelness and position precision of the screen printing plate assembly are improved; and the phenomena that the screen printing plate assembly is stuck and the levelness of the screen printing plate assembly is insufficient due to asynchronous or unbalanced lifting of the two sides of the lifting frame are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of screen printing machines, in particular to a table-type screen printing machine. Background Art

[0002] A screen printer is a device that prints solder paste or ink onto a material through a silk screen. Among existing patents, the Chinese patent document with application number 202021772902.4 discloses a desktop screen printing device, including a printing head, a printing table, and a screen positioning mechanism; the rear end of the baseboard of the printing head is hinged on the sliding frame seat, and the two sides of the front end of the baseboard are connected to the sliding frame seat by baseboard posture adjustment bolts, and the arc-shaped hanging grooves of the hanging plates on both sides of the baseboard are suspended on the corresponding hanging pins on both sides of the sliding frame seat; the sliding frame seat is installed on the head guide rail, and the head motor drives the sliding frame seat to reciprocate along the head guide rail through the screw mechanism; the screen positioning mechanism includes a screen positioning frame, and the two sides of the screen positioning frame are suspended on two screen guide column frames through connecting parts, and the two screen guide column frames are provided with screen height adjustment handle bolts. The patent document uses two screen height adjustment handle bolts on the left and right sides to adjust the parallelism between the screen positioning frame (printing screen) and the supporting surface (substrate), and can also adjust the vertical distance between the two. However, adjustment is inconvenient. Due to the asynchronous operation of the two screen height adjustment handle bolts on the left and right sides, the screen positioning frame may be insufficiently flat. In addition, the screen positioning frame may become stuck due to imbalance when adjusting the screen height. Therefore, the drawback is very obvious and a solution is urgently needed. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a table-type screen printing machine.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A table-top screen printing machine comprises a machine base, a feeding mechanism mounted on the machine base, an XYR adjustment slide connected to the moving end of the feeding mechanism, a printing table mounted on the adjustment end of the XYR adjustment slide, two supports mounted parallel to the machine base and located on both sides of the feeding mechanism, two lifting drive mechanisms mounted on the two supports, a lifting frame that is lifted and arranged above the two supports and is in a U-shaped shape, a screen assembly that is detachably connected to the inner cavity of the lifting frame and is located above the printing table, a printing device that is slidably connected to the top of the lifting frame, and a lifting mechanism mounted on the lifting frame and used to drive the printing device to move back and forth. The movable driving mechanism has two sides connected to the lifting ends of the two lifting driving mechanisms respectively on both sides of the support. The lifting driving mechanism includes two worm screw elevators respectively installed at the two ends of the support, a horizontal transmission shaft connected to the worm of the two worm screw elevators, and a rotating driver installed on the support and connected to the worm drive of one of the worm screw elevators. The rotating driver is used to drive the worm of the worm screw elevator to rotate, and the lifting end of the screw of the worm screw elevator is connected to the lifting frame; the four worm screw elevators of the two lifting driving mechanisms are respectively located at the four corners of the lifting frame.

[0006] Furthermore, two opposite side walls of the inner cavity of the lifting frame are provided with a disassembly and assembly structure, the disassembly and assembly structure includes a support plate installed on the inner cavity side wall of the lifting frame, a mounting plate installed on the inner cavity side wall of the lifting frame and located above the support plate, a downward pressure driver installed on the mounting plate and a downward pressure head installed on the downward pressure end of the downward pressure driver, the downward pressure driver is used to drive the downward pressure head close to or away from the support plate, there is a side insertion space between the support plate and the mounting plate, one side of the screen assembly is inserted into the side insertion space, the support plate is used to support one side bottom surface of the screen assembly, and the downward pressure head is used to press the screen assembly tightly on the support plate.

[0007] Furthermore, a positioning hole is provided on the side wall of the screen assembly, and the pressing head is concavely and convexly matched with the positioning hole.

[0008] Furthermore, the transmission shaft and the worm of the worm screw elevator, and the rotating shaft of the rotary driver and the worm of the worm screw elevator are coaxially connected via couplings.

[0009] Furthermore, the machine base is equipped with a U-shaped outer cover, which is arranged outside the lifting frame and the two supports, and the lifting frame can be lifted and lowered in the outer cover.

[0010] Furthermore, a vacuum cavity is provided inside the printing table, a plurality of suction holes are provided in a rectangular array on the top surface of the printing table, and the plurality of suction holes are connected to the vacuum cavity, and an air hole connected to the vacuum cavity is provided on the side wall of the printing table.

[0011] Furthermore, the lifting drive mechanism also includes a bearing seat, the bearing seat is equipped with a bearing, and the inner ring of the bearing is sleeved outside the middle part of the transmission shaft.

[0012] The beneficial effects of the present invention are as follows: in actual application, the XYR adjustment slide adjusts the position and angle of the printing table, thereby adjusting the position and angle of the material on the printing table. After the feeding mechanism transports the printing table and the material to the bottom of the screen assembly, the mobile drive mechanism drives the printing device to move back and forth above the screen assembly to achieve screen printing on the material. During printing, the worm of one worm screw elevator is driven by the rotary driver to rotate, and the worms of the two worm screw elevators rotate synchronously via the transmission shaft, so that the screw lifting ends of the two worm screw elevators are synchronously raised and lowered, thereby driving the lifting frame to rise and fall, and then adjusting the distance between the screen assembly on the lifting frame and the printing table to meet the requirements of screen printing on materials of different thicknesses. During this process, the two lifting drive mechanisms operate synchronously, and the four worm screw lifting drives in the two lifting drive mechanisms synchronously drive the lifting frame to rise and fall, improving the stability and accuracy of the lifting of the lifting frame and the screen assembly, thereby improving the levelness and position accuracy of the screen assembly, and preventing the phenomenon of jamming and insufficient levelness of the screen assembly due to asynchronous or unbalanced lifting of the two sides of the lifting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model after the outer cover is hidden.

[0015] Figure 3 It is a three-dimensional structural diagram of the machine base, support and lifting drive mechanism of the utility model.

[0016] Figure 4 It is a three-dimensional structural diagram of the lifting frame, mobile drive mechanism and disassembly structure of the utility model.

[0017] Description of reference numerals:

[0018] 1. Machine base; 2. Feeding mechanism; 3. XYR adjustment slide; 4. Printing table; 5. Support; 6. Lifting drive mechanism; 7. Lifting frame; 8. Screen assembly; 9. Printing device; 10. Moving drive mechanism; 11. Turbine screw lift; 12. Drive shaft; 13. Rotating drive; 14. Disassembly and assembly structure; 15. Support plate; 16. Mounting plate; 17. Pressing drive; 18. Pressing head; 19. Side insertion space; 20. Coupling; 21. Outer cover; 22. Suction hole; 23. Air hole; 24. Bearing seat. DETAILED DESCRIPTION

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0020] like Figures 1 to 4 As shown, the utility model provides a table-type screen printing machine, which includes a machine base 1, a feeding mechanism 2 installed on the machine base 1, an XYR adjustment slide 3 connected to the moving end of the feeding mechanism 2, a printing table 4 installed on the adjustment end of the XYR adjustment slide 3, two supports 5 installed in parallel on the machine base 1 and located on both sides of the feeding mechanism 2, two lifting drive mechanisms 6 installed on the two supports 5 respectively, a lifting frame 7 that is lifted and arranged above the two supports 5 and is in a U-shaped shape, a screen assembly 8 that is detachably connected to the inner cavity of the lifting frame 7 and located above the printing table 4, a printing device 9 that is slidably connected to the top of the lifting frame 7, and a lifting device installed on the lifting frame 7 and used to drive the printing device 9 to move The mobile drive mechanism 10 for complex movement, the two sides of the lifting frame 7 are respectively connected to the lifting ends of the two lifting drive mechanisms 6, the lifting drive mechanism 6 includes two worm screw elevators 11 respectively installed at the two ends of the support 5, a horizontal transmission shaft 12 connected to the worm of the two worm screw elevators 11 and a rotating driver 13 installed on the support 5 and connected to the worm drive of one of the worm screw elevators 11. The rotating driver 13 is used to drive the worm of the worm screw elevator 11 to rotate, and the screw lifting end of the worm screw elevator 11 is connected to the lifting frame 7; the four worm screw elevators 11 of the two lifting drive mechanisms 6 are respectively located at the four corners of the lifting frame 7.

[0021] In actual application, the XYR adjustment slide 3 adjusts the position and angle of the printing table 4, thereby adjusting the position and angle of the material on the printing table 4. After the feeding mechanism 2 transports the printing table 4 and the material to the bottom of the screen assembly 8, the mobile drive mechanism 10 drives the printing device 9 to move back and forth above the screen assembly 8 to realize screen printing of the material. During printing, the worm of one worm screw elevator 11 is driven by a rotary driver 13. The worms of the two worm screw elevators 11 rotate synchronously via the drive shaft 12, causing the screw lifting ends of the two worm screw elevators 11 to rise and fall synchronously, thereby driving the lifting frame 7 to rise and fall, and then adjusting the distance between the screen assembly 8 on the lifting frame 7 and the printing table 4 to meet the requirements of screen printing on materials of different thicknesses. During this process, the two lifting drive mechanisms 6 operate synchronously, and the four worm screw lifting drives in the two lifting drive mechanisms 6 synchronously drive the lifting frame 7 to rise and fall, improving the stability and accuracy of the lifting of the lifting frame 7 and the screen assembly 8, thereby improving the levelness and positional accuracy of the screen assembly 8, and preventing jamming or insufficient levelness of the screen assembly 8 due to asynchronous or unbalanced lifting of the two sides of the lifting frame 7. After printing is completed, the feeding mechanism 2 transports the printing table 4 and the material outward, making it easier for the operator to replace the material.

[0022] In this embodiment, two opposite side walls of the inner cavity of the lifting frame 7 are provided with a disassembly structure 14. The disassembly structure 14 includes a support plate 15 mounted on the inner cavity side wall of the lifting frame 7, a mounting plate 16 mounted on the inner cavity side wall of the lifting frame 7 and located above the support plate 15, a downward pressure driver 17 mounted on the mounting plate 16, and a downward pressure head 18 mounted on the downward pressure end of the downward pressure driver 17. The downward pressure driver 17 is used to drive the downward pressure head 18 to move closer to or away from the support plate 15. A side insertion space 19 is defined between the support plate 15 and the mounting plate 16. One side of the screen assembly 8 is inserted into the side insertion space 19. The support plate 15 is used to support the bottom surface of one side of the screen assembly 8. The downward pressure head 18 is used to press the screen assembly 8 against the support plate 15. Specifically, the downward pressure driver 17 can be a cylinder, and the rotation driver 13 can be a motor.

[0023] In actual use, when assembling the screen assembly 8, after inserting the screen assembly 8 into the side insertion space 19, the downward pressure driver 17 drives the downward pressure head 18 downward until the downward pressure head 18 presses the screen assembly 8 against the support plate 15. When the screen assembly 8 needs to be disassembled, the downward pressure driver 17 drives the downward pressure head 18 upward to release the screen assembly 8, allowing the screen assembly 8 to be pulled out of the side insertion space 19. This structural design facilitates the assembly and disassembly of the screen assembly 8 and maintenance.

[0024] Specifically, a ball bearing is rotatably provided on the bottom side of the screen assembly 8, and the ball bearing is used to roll against the support plate 15; through the rolling against the ball bearing and the support plate 15, the friction between the screen assembly 8 and the support plate 15 is reduced, and the disassembly and assembly of the screen assembly 8 is easier and more convenient.

[0025] In this embodiment, a positioning hole is formed in the side wall of the screen assembly 8, and the pressing head 18 is adapted to fit the positioning hole. During assembly, the pressing head 18 extends into the positioning hole and presses the screen assembly 8, thereby improving the stability and positioning accuracy of the pressing screen assembly 8.

[0026] Specifically, the positioning hole is an inverted tapered hole that is wider at the top and narrower at the bottom. By setting the inverted tapered hole, the screen assembly 8 can be corrected.

[0027] Specifically, the pressing surface of the pressing head 18 is provided with a protective pad, which is a rubber pad. The protective pad has a certain elasticity, plays a role of buffering protection, and can increase the friction between the pressing head 18 and the screen assembly 8.

[0028] In this embodiment, the transmission shaft 12 and the worm of the worm gear 11, as well as the rotation shaft of the rotary driver 13 and the worm of the worm gear 11, are coaxially connected via a coupling 20. This structural design facilitates coaxial transmission of the rotary driver 13, the transmission shaft 12, and the two worm gear 11.

[0029] In this embodiment, the base 1 is equipped with a U-shaped outer cover 21, which covers the movable drive mechanism 10, the lifting frame 7 and the two supports 5. The lifting frame 7 can be raised and lowered within the outer cover 21. This structural design not only has an aesthetically pleasing appearance, but also serves a protective function.

[0030] In this embodiment, a vacuum chamber is provided within the printing table 4. A plurality of suction holes 22 are arranged in a rectangular array on the top surface of the printing table 4. Each of the suction holes 22 is connected to the vacuum chamber. Air holes 23 are provided on the sidewalls of the printing table 4 and communicate with the vacuum chamber. A vacuum pump is connected to the air holes 23 via an air pipe. The vacuum pump draws a vacuum through the air holes 23, creating a negative pressure within the vacuum chamber. The suction holes 22 securely hold the material against the printing table 4.

[0031] In this embodiment, the lifting drive mechanism 6 further includes a bearing seat 24, which is equipped with a bearing, the inner ring of which is sleeved on the middle portion of the transmission shaft 12. This structural design allows the bearing seat 24 to support the transmission shaft 12 and improve the rotational stability of the transmission shaft 12.

[0032] Specifically, a distance sensor is embedded in the top surface of the support 5, with its sensing end aligned with the bottom surface of the lifting frame 7. The distance sensor is electrically connected to the rotary actuator 13. When the lifting drive mechanism 6 drives the lifting frame 7 to move up or down, the distance sensor detects the distance between the lifting frame 7 and the support 5. When the distance between the lifting frame 7 and the support 5 reaches a preset distance value, the distance sensor sends a feedback signal to the rotary actuator 13, causing it to stop operating, thereby ensuring the accuracy and stability of the lifting of the lifting frame 7.

[0033] Specifically, the movement drive mechanism 10 comprises two belt assemblies, one mounted on opposite outer walls of the lifting frame 7, a linkage shaft drivingly connected to the two belt assemblies, and a rotation drive module mounted on the lifting frame 7 and configured to rotate the linkage shaft or one of the belt assemblies. The two sides of the printing device 9 are fixedly connected to the belts of the two belt assemblies. In actual use, the rotation drive module drives the linkage shaft or one of the belt assemblies. Driven by the linkage shaft, the belts of the two belt assemblies rotate synchronously in forward and reverse directions, thereby driving the reciprocating movement of the printing device 9.

[0034] All technical features in this embodiment can be freely combined according to actual needs.

[0035] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A table-top screen printing machine, characterized by: The invention comprises a machine base (1), a feeding mechanism (2) mounted on the machine base (1), an XYR adjustment slide (3) connected to the moving end of the feeding mechanism (2), a printing table (4) mounted on the adjustment end of the XYR adjustment slide (3), two supports (5) mounted in parallel on the machine base (1) and located on both sides of the feeding mechanism (2), two lifting drive mechanisms (6) respectively mounted on the two supports (5), a lifting frame (7) which is lifted and arranged above the two supports (5) and is in a U-shaped shape, a screen assembly (8) which is detachably connected to the inner cavity of the lifting frame (7) and is located above the printing table (4), a printing device (9) slidably connected to the top of the lifting frame (7), and a moving drive mounted on the lifting frame (7) and used to drive the printing device (9) to move back and forth. The lifting frame (7) is provided with a lifting mechanism (10), and both sides of the lifting frame (7) are respectively connected to the lifting ends of the two lifting drive mechanisms (6). The lifting drive mechanism (6) includes two worm screw elevators (11) respectively installed at the two ends of the support (5), a transmission shaft (12) connected to the worm of the two worm screw elevators (11) in a horizontal transmission, and a rotation driver (13) installed on the support (5) and connected to the worm of one of the worm screw elevators (11). The rotation driver (13) is used to drive the worm of the worm screw elevator (11) to rotate. The lifting end of the screw of the worm screw elevator (11) is connected to the lifting frame (7); the four worm screw elevators (11) of the two lifting drive mechanisms (6) are respectively located at the four corners of the lifting frame (7).

2. The tabletop screen printing machine according to claim 1, characterized in that: The two opposite side walls of the inner cavity of the lifting frame (7) are both provided with a disassembly structure (14). The disassembly structure (14) comprises a support plate (15) installed on the inner cavity side wall of the lifting frame (7), a mounting plate (16) installed on the inner cavity side wall of the lifting frame (7) and located above the support plate (15), a downward pressure driver (17) installed on the mounting plate (16), and a downward pressure head (18) installed on the downward pressure end of the downward pressure driver (17). The downward pressure driver (17) is used to drive the downward pressure head (18) to approach or move away from the support plate (15). A side insertion space (19) is provided between the support plate (15) and the mounting plate (16). One side of the screen assembly (8) is inserted into the side insertion space (19). The support plate (15) is used to support the bottom surface of one side of the screen assembly (8). The downward pressure head (18) is used to press the screen assembly (8) onto the support plate (15).

3. The tabletop screen printing machine according to claim 2, characterized in that: A positioning hole is provided on the side wall of the screen assembly (8), and the lower pressing head (18) is concavely and convexly matched with the positioning hole.

4. The tabletop screen printing machine according to claim 1, characterized in that: The transmission shaft (12) and the worm of the worm screw elevator (11), as well as the rotating shaft of the rotary driver (13) and the worm of the worm screw elevator (11) are coaxially connected via a coupling (20).

5. The tabletop screen printing machine according to claim 1, characterized in that: The machine base (1) is provided with a U-shaped outer cover (21), which is arranged outside the lifting frame (7) and the two supports (5), and the lifting frame (7) can be lifted and lowered in the outer cover (21).

6. The tabletop screen printing machine according to claim 1, characterized in that: A vacuum cavity is provided inside the printing table (4); a top surface of the printing table (4) is provided with a plurality of suction holes (22) in a rectangular array; the plurality of suction holes (22) are all connected to the vacuum cavity; and a side wall of the printing table (4) is provided with an air hole (23) connected to the vacuum cavity.

7. The tabletop screen printing machine according to claim 1, characterized in that: The lifting drive mechanism (6) further comprises a bearing seat (24), the bearing seat (24) being provided with a bearing, the inner ring of the bearing being sleeved outside the middle portion of the transmission shaft (12).

Images