Curved surface automobile glass screen printing machine

Abstract

The utility model relates to a curved surface automobile glass screen printing machine which comprises a frame, a table top, a screen frame mechanism and a printing mechanism. A table top is installed in the center of the frame, and a profiling mould manufactured according to the shape and size of glass to be printed is installed on the table top. A ball screw and a linear guide rail which are connected with the screen frame mechanism are arranged on two sides of the frame, guide rail mounting seats are hinged to two ends of the screen frame mechanism, two ends of each guide rail mounting seat are mounted on the linear guide rail, and the middle of each guide rail mounting seat is connected with the ball screw through a screw connecting block. When the lead screw rotates, the screen frame mechanism ascends or descends or inclines along with the lead screw. Large arms of the printing mechanism are installed on screen frame cross beams on the two sides of the screen frame mechanism and move along with the screen frame mechanism. The curved glass printing machine is used for printing large-size curved glass such as front windshield glass, skylight glass and rear windshield glass of an automobile; the screen frame mechanism capable of being lifted and inclined drives the printing mechanism to be lifted and inclined, so that the surface fitting degree of the printing mechanism and the curved automobile glass is higher, the printing quality is improved, and the reject ratio is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of screen printing machines, and particularly relates to a screen printing machine for curved automotive glass. Background Art

[0002] Nowadays, China's automotive market is in a stage of stock competition. To attract consumers to purchase, vehicle manufacturers must continuously develop new functions and highlights of vehicles, such as ambient light glass, dimming glass, photovoltaic glass, heat-insulating glass, etc. Some of them involve the screen printing process on the glass surface. For example, for the ambient light sunroof glass, an ink layer that can refract optical fibers is printed inside the glass. By using the LED light sources distributed throughout the glass, the optical fibers are refracted multiple times inside the glass, thus presenting the effect of the entire glass surface emitting light. However, this process requires screen printing after the glass is tempered and formed. Since large sunroof glasses are generally curved glasses, using a conventional flat glass printing machine after forming will result in poor printing effects and high defect rates. Therefore, a screen printing machine for curved automotive glass needs to be designed. Summary of the Invention

[0003] The utility model provides a screen printing machine for curved automotive glass to solve the technical problems existing in the known technology, with good printing quality and low defect rate.

[0004] The utility model includes the following technical solutions: a screen printing machine for curved automotive glass, comprising a frame, a table, a screen frame mechanism, and a printing mechanism; a table is installed at the central position of the frame, and a profiling mold made according to the shape and size of the glass to be printed is installed on the table; ball screws and linear guides for connecting the screen frame mechanism are arranged on both sides of the frame. The two ends of the screen frame mechanism are hinged to a guide rail mounting seat, and both ends of the guide rail mounting seat are installed on the linear guide, and the middle part is connected to the ball screw through a screw connection block; when the ball screw rotates, the screen frame mechanism rises, falls, or tilts accordingly; the boom of the printing mechanism is installed on the screen frame cross beams on both sides of the screen frame mechanism and moves along with the screen frame mechanism. Different molds need to be replaced when printing different models of glass.

[0005] Further, the frame includes a frame body with linear guides installed inside the columns at the four corners. Two adjacent linear guides are connected to one end of the screen frame mechanism as a group; a ball screw is arranged in the middle of each group of linear guides, and the end of the ball screw is connected to a reducer and a servo motor. The reducer and the servo motor drive the ball screw to rotate, thereby driving the screw connection block and the guide rail mounting seat to move up and down.

[0006] Further, the tabletop includes a bottom frame, a mounting plate, and a profiling mold; the mounting plate is arranged on the bottom frame, and the profiling mold is arranged on the mounting plate; the mounting plate and the profiling mold are positioned by mounting structures such as positioning blocks or spring clips, etc., facilitating the unchanged position reference when the profiling mold is replaced. The profiling mold is generally made by glass manufacturers according to different specifications and models of glass, and the material is lightweight wood or cast aluminum structure. The surface of the profiling mold is provided with vacuum suction cups with reasonable height and quantity for fixing the glass.

[0007] Further, the screen frame mechanism further includes a screen frame cross beam, a connecting beam, and a screen frame supporting beam; the screen frame cross beam is located at both ends of the top surface of the two connecting beams and forms a rigid frame structure, and the screen frame supporting beam is arranged on the connecting beam for installing the screen plate.

[0008] Further, the bottom surface of one end of the screen frame cross beam is hinged to the guide rail mounting seat through a hinge, and the bottom surface of the screen frame cross beam at the other end is hinged to the guide rail mounting seat through a sliding sleeve hinge.

[0009] Further, the hinge is composed of a rotating seat, a rotating shaft, and a bearing seat; the rotating seat is fixed to the screen frame cross beam, and the bearing seat is fixed to the guide rail mounting seat; the bearing seat and the rotating seat rotate around the rotating shaft as the axis.

[0010] Further, the sliding sleeve hinge is composed of a guide shaft, a sliding sleeve, and a sliding sleeve bearing seat; one end of the guide shaft is fixed to the guide rail mounting seat, the middle part of the guide shaft passes through the central shaft hole of the sliding sleeve, and the sliding sleeve can slide left and right on the guide shaft; there are sliding sleeve rotating shafts on both sides of the sliding sleeve, and sliding sleeve bearing seats fixed to the screen frame cross beam are installed on the sliding sleeve rotating shafts, and the sliding sleeve bearing seats rotate around the sliding sleeve rotating shafts as the axis.

[0011] Further, the printing mechanism includes a connecting plate structure, a large arm, a printing ink return mechanism, and a driving mechanism; the connecting plate structure is located at both ends of the large arm and is connected to the screen frame mechanism, and the driving mechanism is arranged on one end of the connecting plate structure; the printing ink return mechanism is located in the middle of the large arm.

[0012] Further, a guide rail is installed on the large arm, and the printing ink return mechanism is installed on the guide rail through a slider and moves left and right along the large arm under the control of the driving mechanism.

[0013] Further, the driving mechanism is connected to the printing ink return mechanism through a synchronous toothed belt and drives the printing ink return mechanism to move.

[0014] The advantages and positive effects of the present utility model are as follows:

[0015] 1. The present utility model drives the lifting and tilting of the printing mechanism through the screen frame mechanism that can be lifted and tilted, thereby making its surface fit better with the surface of the curved automotive glass, further improving the printing quality and reducing the defective rate.

[0016] 2. The present utility model is mainly used for printing on large-sized curved glass such as automotive front windshield glass, skylight glass, and rear windshield glass. Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of the present utility model;

[0018] Figure 2 is the front view schematic diagram of the present utility model;

[0019] Figure 3 is the structural framework schematic diagram of the present utility model;

[0020] Figure 4 is the tabletop structure schematic diagram of the present utility model;

[0021] Figure 5 is the front view schematic diagram of the screen frame mechanism of the present utility model;

[0022] Figure 6 is the bottom view schematic diagram of the screen frame mechanism of the present utility model;

[0023] Figure 7 is the three-dimensional structural schematic diagram of the screen frame mechanism of the present utility model;

[0024] Figure 8 is Figure 6 the enlarged view of the structure at A - A in

[0025] Figure 9 is the schematic diagram of the printing mechanism of the present utility model;

[0026] In the figure, 1 - frame; 11 - frame main body; 12 - linear guide rail; 13 - ball screw; 14 - speed reducer; 15 - servo motor; 2 - tabletop; 21 - bottom frame; 22 - mounting plate; 23 - profiling mold.

[0027] 3 - screen frame mechanism; 31 - screw connection block; 32 - guide rail mounting seat; 33 - hinge; 34 - sliding sleeve hinge; 341 - guide shaft; 342 - sliding sleeve; 343 - sliding sleeve bearing seat; 344 - sliding sleeve rotating shaft; 35 - screen frame cross beam; 36 - connecting beam; 37 - screen frame supporting beam.

[0028] 4 - printing mechanism; 41 - connecting plate structure; 42 - large arm; 43 - printing ink return mechanism; 44 - driving mechanism. Detailed Embodiment

[0029] To further disclose the content, features, and effects of the invention, the following examples are specifically given and described in detail in conjunction with the accompanying drawings. In the description of the following embodiments, it should be understood that the orientation or positional relationships indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing this patent 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 thus should not be construed as a limitation to this patent.

[0030] In the description of the following embodiments, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "fixation", "swivel connection", "connection", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or it can be detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0031] Embodiment: Refer to the attached Figure 1-9 , a curved surface automotive glass screen printing machine, including a frame 1, a table 2, a screen frame mechanism 3, and a printing mechanism 4; the table 2 is installed at the central position of the frame 1, and a profiling mold made according to the shape and size of the glass to be printed is installed on the table 2; ball screw 13 and linear guide 14 for connecting the screen frame mechanism are arranged on both sides of the frame; both ends of the screen frame mechanism 3 are hinged to the guide rail mounting seat 32, both ends of the guide rail mounting seat 32 are installed on the linear guide 12, and the middle part is connected to the ball screw 13 through the screw connection block 31; the screw connection block 31 is connected to the nut part of the ball screw 13, and when the ball screw 13 rotates, the screen frame mechanism 3 rises, falls, or tilts accordingly; the large arm 42 of the printing mechanism 4 is installed on the screen frame cross beams 37 on both sides of the screen frame mechanism 3 and moves along with the screen frame mechanism 3. Different corresponding molds need to be replaced when printing different models of glass.

[0032] As Figure 3 shown, the frame 1 includes a frame body 11 with linear guides 12 installed on the inner sides of the four corner columns, and two adjacent linear guides 12 are connected to one end of the screen frame mechanism 3 as a group; a ball screw 13 is arranged in the middle of each group of linear guides 12, and the end of the ball screw 13 is connected to a speed reducer 14 and a servo motor 15. The speed reducer 14 and the servo motor 15 drive the ball screw 13 to rotate, thereby driving the screw connection block 31 and the guide rail mounting seat 32 to move up and down.

[0033] As Figure 4As shown in the figure, the tabletop 2 includes a bottom frame 21, a mounting plate 22, and a profiling jig 23; the mounting plate 22 is arranged on the bottom frame 21, and the profiling jig 23 is arranged on the mounting plate 22; the mounting plate 22 and the profiling jig 23 are positioned by mounting structures such as positioning blocks or spring clips, etc., so that the position reference remains unchanged when the profiling jig 23 is replaced. The profiling jig 23 is generally made by glass manufacturers according to glass of different specifications and models, and the material is lightweight wood or cast aluminum structure. The surface of the profiling jig 23 is provided with vacuum suction cups with reasonable height and quantity for fixing the glass.

[0034] As Figure 5-8 shown in the figure, the screen frame mechanism 3 further includes a screen frame cross beam 35, a connecting beam 36, and a screen frame supporting beam 37; the screen frame cross beam 35 is located at both ends of the top surfaces of the two connecting beams 36 and forms a rigid frame structure, and the screen frame supporting beam 37 is arranged on the connecting beam 36 for installing the screen plate. The bottom surface of one end of the screen frame cross beam 35 is hinged to the guide rail mounting seat 32 through a hinge 33, and the bottom surface of the screen frame cross beam 35 at the other end is hinged to the guide rail mounting seat 32 through a sliding sleeve hinge 34. The hinge 33 is composed of a rotating seat, a rotating shaft, and a bearing seat. The rotating seat is fixed to the screen frame cross beam 35, and the bearing seat is fixed to the guide rail mounting seat 32; the bearing seat and the rotating seat rotate around the rotating shaft as the axis. The sliding sleeve hinge 34 is composed of a guide shaft 341, a sliding sleeve 342, and a sliding sleeve bearing seat 343. One end of the guide shaft 341 is fixed to the guide rail mounting seat 32, the middle of the guide shaft 341 passes through the central shaft hole of the sliding sleeve 342, and the sliding sleeve 342 can slide left and right on the guide shaft 341; there are sliding sleeve rotating shafts 344 on both sides of the sliding sleeve 342, and sliding sleeve bearing seats 343 fixed to the screen frame cross beam 35 are installed on the sliding sleeve rotating shafts 344, and the sliding sleeve bearing seats 343 rotate around the sliding sleeve rotating shafts 344 as the axis.

[0035] The screen frame mechanism 3 can be lifted together when the ball screw 13 is lifted, or it can also make a tilting action when one of the two ball screws 13 rises and the other falls. As the height difference between the two sides of the rise and fall increases, the tilting angle of the screen frame mechanism 3 increases accordingly. When the screen frame mechanism 3 tilts, it serves as the hypotenuse, and the connecting length exceeds the length when the heights on both sides are the same. The additional length is compensated by structures such as the guide shaft and the sliding sleeve of the sliding sleeve hinge 34.

[0036] As Figure 9As shown, the printing mechanism 4 includes a connecting plate structure 41, a large arm 42, a printing and ink-returning mechanism 43, and a driving mechanism 44. The connecting plate structure 41 is located at both ends of the large arm 42 and is connected to the screen frame mechanism 3. The driving mechanism 44 is arranged on the connecting plate structure 41 at one end. The printing and ink-returning mechanism 43 is located in the middle of the large arm 42. A guide rail is installed on the large arm 42, and the printing and ink-returning mechanism 43 is installed on the guide rail through a slider and moves left and right along the large arm 42 under the control of the driving mechanism 44. The driving mechanism 44 is connected to the printing and ink-returning mechanism 43 through a synchronous toothed belt and drives the printing and ink-returning mechanism 43 to move.

[0037] Workflow: Before printing, prepare the work, install the screen plate and add ink, install the printing and ink-returning mechanism 43. After the curved glass is positioned, it is placed on the profiling jig 23 by the loading manipulator and adsorbed and fixed through a suction cup. The printing parameter of each position is called according to the glass specification. When starting printing, one side of the ball screw 13 rises and the other side descends, making the screen plate inclined and fitting the starting end of the glass for printing. After starting printing, the driving mechanism 44 drives the printing and ink-returning mechanism 43 to move. During the movement, the servo motors 15 on both sides control the rotation of the ball screw 13, so that the screen plate is adjusted according to the glass curvature and printing speed until the printing is completed. After completion, the screen plate rises to a high position and a horizontal state and then starts to return ink. The unloading manipulator takes out the printed glass. The starting end of printing should be on the same side as the sliding sleeve hinge 34, and the ending end should be on the same side as the hinge 33, so as to ensure that the pattern on the screen plate does not shift during printing.

[0038] Although the preferred embodiments of the present invention are described above, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims. These all fall within the protection scope of the present invention.

Claims

1. A curved surface automobile glass screen printer, characterized in that: It includes a frame, a table, a screen frame mechanism and a printing mechanism; the table is installed at the center of the frame, and a contoured mold made according to the shape and size of the glass to be printed is installed on the table; ball screws and linear guides connected to the screen frame mechanism are arranged on both sides of the frame, and the two ends of the screen frame mechanism are hinged to the guide rail mounting seats, and the two ends of the guide rail mounting seats are installed on the linear guide rails, and the middle part is connected to the ball screw through a screw connecting block; when the ball screw rotates, the screen frame mechanism rises or falls or tilts accordingly; the large arms of the printing mechanism are installed on the screen frame beams on both sides of the screen frame mechanism and move with the screen frame mechanism.

2. The curved surface automobile glass screen printer according to claim 1, characterized in that: The frame includes a frame body with linear guides installed inside the four corner columns, and two adjacent linear guides are connected to one end of the network frame mechanism in a group; a ball screw is arranged in the middle of each group of linear guides, and the end of the ball screw is connected to a reducer and a servo motor.

3. The curved surface automobile glass screen printer according to claim 1, characterized in that: The table top comprises a bottom frame, a mounting plate and a profiling jig; the bottom frame is provided with a mounting plate, and the profiling jig is provided on the mounting plate; a vacuum suction cup is provided on the surface of the profiling jig, and the profiling jig is made of wood or cast aluminum.

4. The curved surface automobile glass screen printer according to claim 1, characterized in that: The net frame mechanism also includes a net frame crossbeam, a connecting beam and a net frame supporting beam; the net frame crossbeam is located at both ends of the top surface of the two connecting beams and forms a rigid frame structure, and the net frame supporting beam is arranged on the connecting beam.

5. The curved surface automobile glass screen printer according to claim 4, characterized in that: The bottom surface of the net frame cross beam at one end is hinged to the guide rail mounting seat through a hinge, and the bottom surface of the net frame cross beam at the other end is hinged to the guide rail mounting seat through a sliding sleeve hinge.

6. The curved surface automobile glass screen printer according to claim 5, characterized in that: The hinge is composed of a rotating seat, a rotating shaft, and a bearing seat. The rotating seat is fixed to the screen frame crossbeam, and the bearing seat is fixed to the guide rail mounting seat. The bearing seat and the rotating seat rotate with the rotating shaft as the axis.

7. The curved surface automobile glass screen printer according to claim 5, characterized in that: The sliding sleeve hinge is composed of a guide shaft, a sliding sleeve, and a sliding sleeve bearing seat. One end of the guide shaft is fixed to the guide rail mounting seat, and the middle of the guide shaft passes through the central axis hole of the sliding sleeve. The sliding sleeve can slide left and right on the guide shaft; there are sliding sleeve rotating shafts on both sides of the sliding sleeve, and the sliding sleeve bearing seat fixed to the screen frame crossbeam is installed on the sliding sleeve rotating shaft, and the sliding sleeve bearing seat rotates with the sliding sleeve rotating shaft as the axis.

8. The curved surface automobile glass screen printer according to claim 1, characterized in that: The printing mechanism comprises a connecting plate structure, a large arm, a printing ink return mechanism and a driving mechanism; the connecting plate structure is located at both ends of the large arm and is connected to the screen frame mechanism, and the driving mechanism is arranged on the connecting plate structure at one end; the printing ink return mechanism is located in the middle of the large arm.

9. The curved surface automobile glass screen printer according to claim 8, characterized in that: A guide rail is installed on the large arm, and the printing ink return mechanism is installed on the guide rail through a slider and moves left and right along the large arm under the control of a driving mechanism.

10. The curved surface automobile glass screen printer according to claim 9, characterized in that: The driving mechanism is connected to the printing ink return mechanism through a synchronous toothed belt and drives the printing ink return mechanism to move.

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