Pad Printing Machine

Abstract

The present invention discloses a pad printing machine, comprising: a conveyor belt assembly, comprising a conveyor belt, a material positioning device is arranged on the side of the conveyor belt, the material positioning device comprises a first telescopic device arranged on the side of the conveyor belt and can be telescopic perpendicular to the belt surface of the conveyor belt, the first telescopic device is used to block the corresponding conveying member including the material from continuing to be transmitted after being extended perpendicular to the belt surface of the conveyor belt, so as to position the corresponding conveying member at a preset material picking position on the conveyor belt in the transmission direction of the conveyor belt; a pad printing assembly arranged on the side of the conveyor belt assembly for performing pad printing operations; a manipulator for transferring the material in the conveying member between the pad printing assembly and the preset material picking position. The cooperation between the conveyor belt assembly and the manipulator improves the automation degree of the material pad printing process, the first telescopic device can prevent the material from exceeding the preset material picking position, can improve the reliability of the material positioning in the transmission direction, ensure the smooth progress of the manipulator's transfer operation, and thus improve the pad printing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of pad printing, and in particular to a pad printing machine. Background Art

[0002] At present, pad printing machines have become a major equipment for printing on the surface of various materials. In a typical pad printing machine, the materials to be printed are placed manually on the pad printing assembly for pad printing. However, more and more materials to be printed are in large batches, and the manual material placement method is inefficient, the labor intensity of the staff is high, and the pad printing efficiency is low, which is difficult to meet production needs.

[0003] Therefore, how to improve pad printing efficiency is a technical problem that those skilled in the art currently need to solve. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a pad printing machine with high pad printing efficiency.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pad printing machine, comprising:

[0007] A conveyor belt assembly, comprising a conveyor belt, a material positioning device is provided on the side of the conveyor belt, the material positioning device comprises a first telescopic device provided on the side of the conveyor belt and capable of being telescopic perpendicular to the belt surface of the conveyor belt, the first telescopic device is used to block the corresponding conveying member including the material from continuing to be conveyed after being extended perpendicular to the belt surface of the conveyor belt, so as to position the corresponding conveying member at a preset material picking position on the conveyor belt in the conveying direction of the conveyor belt;

[0008] a pad printing assembly disposed on a side of the conveyor belt assembly and used for performing pad printing operations;

[0009] A manipulator for transferring materials in a conveyor between the pad printing assembly and the preset material picking position.

[0010] Preferably, the material positioning device also includes a second telescopic device arranged on the side of the conveyor belt and capable of being telescopically extended and retracted perpendicularly to the belt surface of the conveyor belt, and is used to block the corresponding conveying member from continuing to convey after being extended perpendicularly to the belt surface of the conveyor belt, so as to position the conveying member on the conveyor belt outside the preset material picking position in the conveying direction.

[0011] Preferably, the material positioning device further comprises a limiting guide rail, and the limiting guide rail and the conveyor belt are staggeredly arranged along a direction perpendicular to the conveying direction; adjacent limiting guide rails cooperate to guide the conveying member therebetween in the conveying direction.

[0012] Preferably, the material positioning device also includes a clamping device, and the clamping device and the first telescopic device are arranged in sequence along the conveying direction of the conveyor belt; the clamping device can be telescopic parallel to the belt surface and perpendicular to the conveying direction and clamp the conveying member after extending.

[0013] Preferably, the material positioning device also includes a second conveying member sensor, and the first telescopic device, the clamping device and the second conveying member sensor are respectively electrically connected to the controller; the second conveying member sensor is used to sense the presence or absence of the conveying member; the controller is used to control the extension of the first telescopic device and the clamping action of the clamping device according to the detection result of the second conveying member sensor.

[0014] Preferably, the pad printing assembly includes a printing platform, which includes a support seat for supporting the material and a plurality of first platform positioning devices, each of which is used to clamp and position the material along a corresponding preset positioning direction perpendicular to the supporting direction of the support seat.

[0015] Preferably, at least one of the first platform positioning devices is an adjustable platform positioning device, and the adjustable platform positioning device includes an adjustable positioning drive device, a first fixed positioning portion and an adjustable positioning portion, the first fixed positioning portion is fixed to the output portion of the adjustable positioning drive device, the adjustable positioning portion is rotatably connected to the output portion of the adjustable positioning drive device and the rotation center is parallel to the supporting direction, the first fixed positioning portion and the adjustable positioning portion are arranged on both sides of the support seat so as to approach each other along the corresponding preset positioning direction under the drive of the adjustable positioning drive device to clamp and position the material.

[0016] Preferably, the first platform positioning device also includes a fixed platform positioning device whose preset positioning direction is perpendicular to the preset positioning direction of the adjustable platform positioning device; the fixed platform positioning device includes a fixed positioning drive device and two second fixed positioning parts fixed to the output part of the fixed positioning drive device, and the two second fixed positioning parts are arranged on both sides of the support seat so as to approach each other along the corresponding preset positioning direction under the drive of the fixed positioning drive device to clamp and position the material.

[0017] Preferably, each of the first platform positioning devices also includes a positioning part sensor, which is used to sense the positioning part in the first platform positioning device for positioning the material. The positioning part sensor and the positioning drive device in the first platform positioning device for driving the positioning part to move along the corresponding preset positioning direction are respectively electrically connected to the controller, and the controller is used to control the start and stop of the corresponding positioning drive device according to the sensing result of the positioning part sensor.

[0018] Preferably, the printing platform is fixed on the output end of the second platform positioning device, and the second platform positioning device can drive the printing platform to move in a direction perpendicular to the supporting direction to adjust the position of the printing platform.

[0019] The pad printing machine provided by the present invention includes: a conveyor belt assembly including a conveyor belt, a material positioning device is provided on the side of the conveyor belt, the material positioning device includes a first telescopic device arranged on the side of the conveyor belt and can be telescopic perpendicular to the belt surface of the conveyor belt, the first telescopic device is used to block the corresponding conveying member including the material from continuing to be conveyed after being extended perpendicular to the belt surface of the conveyor belt, so as to position the corresponding conveying member at a preset material picking position on the conveyor belt in the conveying direction of the conveyor belt; a pad printing assembly arranged on the side of the conveyor belt assembly for performing pad printing operations; a robot arm for transferring materials in the conveying member between the pad printing assembly and the preset material picking position.

[0020] The conveyor belt assembly can realize automatic batch transmission of materials, and the manipulator can complete the material transfer operation between the conveyor belt assembly and the pad printing assembly. There is no need for manual work to pick up materials from the conveyor belt assembly and then put them on the pad printing assembly, which improves the degree of automation of the material pad printing process and helps to reduce the labor intensity of the staff. The first telescopic device can block the material at a preset material picking position to prevent the material from exceeding the preset material picking position, which can improve the reliability of material positioning in the conveying direction and ensure the smooth progress of the manipulator's transfer operation, thereby improving the pad printing efficiency through the cooperation of the conveyor belt assembly, the manipulator and the first telescopic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 The overall layout diagram of the pad printing machine provided by the present invention;

[0023] Figure 2 It is a structural diagram of the first platform positioning device and the second platform positioning device in the pad printing machine provided by the present invention;

[0024] Figure 3 A structural diagram of the second platform positioning device in the pad printing machine provided by the present invention;

[0025] Figure 4 This is an internal structural diagram of the second platform positioning device in the pad printing machine provided by the present invention;

[0026] Figure 5It is a structural diagram of the first platform positioning device in the pad printing machine provided by the present invention;

[0027] Figure 6 This is an internal structural diagram of the first platform positioning device in the pad printing machine provided by the present invention;

[0028] Figure 7 A structural diagram of an adjustable platform positioning device in a pad printing machine provided by the present invention;

[0029] Figure 8 A partial structural diagram of a conveyor belt assembly in a pad printing machine provided by the present invention;

[0030] Fig. 9 This is an overall layout diagram of another pad printing machine provided by the present invention;

[0031] Fig.10 A partial structural diagram of a conveyor belt assembly in another pad printing machine provided by the present invention.

[0032] Figures 1 to 10 middle:

[0033] 1- Materials;

[0034] 2-support base, 21-printing jig, 22-jig bottom plate;

[0035] 31-first support plate, 32-second support plate, 33-middle anti-collision block;

[0036] 41-X-direction support seat, 42-X-direction guide rail, 43-X-direction screw, 44-second adjustable block, 45-first adjustable block, 46-X-direction motor, 47-fixing sleeve, 48-telescopic rod, 49-third positioning column, 410-X-direction nut, 411-X-direction positioning sensor;

[0037] 51-Y-axis support seat, 52-Y-axis synchronous wheel, 53-Y-axis lead screw, 54-Y-axis synchronous belt, 55-Y-axis motor, 56-rotation limiting structure, 57-second positioning column, 58-first positioning column, 59-first Y-axis positioning sensor, 510-Y-axis guide rail, 511-first fixed connecting rod, 512-adjustable connecting rod, 513-second Y-axis positioning sensor, 514-Y-axis nut;

[0038] 61-hot air box, 611-hot air outlet, 62-cleaning mechanism, 63-oil cup assembly, 631-product pattern, 64-XXY precision alignment platform, 641-Y motor, 642-cross slide, 643-sensor, 644-X motor, 65-printing platform;

[0039] 7-Manipulator;

[0040] 8- conveyor belt assembly, 81- conveyor belt, 811- belt, 82- first conveying member sensor, 83- first telescopic device, 84- material tray, 841- first material tray, 842- second material tray, 843- third material tray, 844- material trough, 85- limiting guide rail, 86- second telescopic device, 87- stop column, 88- telescopic drive device, 89- second conveying member sensor, 810- clamping device, 8101- clamping positioning column, 8102- clamping drive device. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The core of the present invention is to provide a pad printing machine with high pad printing efficiency.

[0043] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "X", "Y", "Z", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In a specific embodiment of the pad printing machine provided by the present invention, please refer to Figure 1 , including a conveyor belt assembly 8, a pad printing assembly and a robot 7. The conveyor belt assembly 8 includes a conveyor belt 81, and a material positioning device is arranged on the side of the conveyor belt assembly 8, and the material positioning device includes a first telescopic device 83.

[0045] The conveyor belt 81 may be one, or two or more conveyor belts may be arranged in parallel perpendicular to the conveying direction. Figure 1 In the illustrated embodiment, four conveyor belts 81 are arranged in parallel, and the conveying direction of each conveyor belt 81 is consistent with the conveying direction of the conveyor belt assembly 8.

[0046] The conveyor belt 81 conveys the conveyor member thereon. Optionally, the conveyor member may specifically be only the material 1. Alternatively, the conveyor member may include a material tray 84 and the material 1 disposed in the material tray 84, and the position of the material 1 is positioned while the conveyor member is positioned.

[0047] The first telescopic device 83 is arranged on the side of the conveyor belt 81 and can be extended and retracted perpendicular to the belt surface of the conveyor belt 81. The first telescopic device 83 is used to block the corresponding conveying parts on the conveyor belt 81 from continuing to convey after extending perpendicular to the belt surface of the conveyor belt 81, thereby positioning the corresponding conveying parts at the preset material picking position on the conveyor belt 81 in the conveying direction of the conveyor belt 81.

[0048] The pad printing assembly is arranged on the side of the conveyor belt assembly 8 for performing pad printing operation. Figure 1 As shown, the pad printing assembly may include a pad printing head, a hot air box 61 for drying the ink on the pad printing head, a cleaning mechanism 62 for cleaning the ink on the pad printing head, and an oil cup assembly 63 for removing ink from the pad printing head.

[0049] The manipulator 7 is used to transfer the material 1 in the conveyor between the pad printing assembly and the preset material picking position on the conveyor belt 81. Specifically, the manipulator 7 transfers the material 1 between the printing platform 65 of the pad printing assembly and the preset material picking position, which can specifically include transferring the material 1 to be printed on the conveyor belt 81 to the printing platform 65, and transferring the material 1 after pad printing on the printing platform 65 back to the conveyor belt 81 at the preset material picking position. Of course, according to program settings and needs, the material 1 after pad printing can also be transferred to other positions through the manipulator 7.

[0050] Preferably, the manipulator 7, the pad printing assembly and the conveyor belt assembly can be electrically connected to the controller, so as to realize unified control of various components of the pad printing machine through the controller, and the controller can automatically control the action of the manipulator 7 according to the operation of the conveyor belt assembly and the pad printing assembly. Alternatively, the manipulator 7, the conveyor belt assembly and the pad printing assembly can be controlled manually respectively.

[0051] In this embodiment, the conveyor belt assembly 8 can realize automatic batch transmission of material 1, and the manipulator 7 can complete the material 1 transfer operation between the conveyor belt assembly 8 and the pad printing assembly. There is no need to manually pick up the material and then put it on the pad printing assembly, which improves the degree of automation of the material 1 pad printing process and helps to reduce the labor intensity of the staff. The first telescopic device 83 can block the material 1 at the preset material picking position to prevent the material from exceeding the preset material picking position, which can improve the reliability of the positioning of the material 1 in the conveying direction, and can ensure the smooth progress of the transfer operation of the manipulator 7, thereby improving the pad printing efficiency through the cooperation of the conveyor belt assembly 8, the manipulator 7 and the first telescopic device 83.

[0052] Furthermore, the pad printing machine further includes a material tray 84, which together with the material 1 constitutes a conveying member. The material tray 84 is used to place the material 1, and the material tray 84 is placed on the conveyor belt 81. The first telescopic device 83 blocks the material 1 in the material tray 84 by blocking the corresponding material tray 84, thereby positioning the material 1 at a preset material taking position.

[0053] The conveyor belt 81 and the material tray 84 thereon are in contact but not directly connected. After being blocked by the first telescopic device 83 , the conveyor belt 81 and the material tray 84 can slide relative to each other in the conveying direction.

[0054] The number of material slots 844 provided on the material tray 84 for carrying the material 1 can be set as required, such as Figure 1 As shown, the material tray 84 is provided with 10 material slots 844, so that one material tray 84 can transfer 10 materials 1. Of course, in other embodiments, the number of material slots 844 provided on each material tray 84 can be 1, 3 or other numbers.

[0055] Preferably, the shape of each material slot 844 is adapted to the material 1, and the material 1 can be fixed in the material slot 844 of the material tray 84. During the conveying process, the material tray 84 and the material 1 will not be relatively displaced in the conveying direction. For example, for curved glass, the material slot 844 is a corresponding curved slot; or for a rectangular material 1, the material slot 844 is a corresponding rectangular slot.

[0056] The material tray 84 is used to load and support the material 1, which can avoid friction between the material 1 and the belt surface of the conveyor belt 81, and can prevent the first telescopic device 83 from directly contacting and hitting the material 1 during the blocking operation, thereby protecting the material 1.

[0057] Furthermore, the material positioning device also includes a second telescopic device 86 disposed on the side of the conveyor belt 81, and the second telescopic device 86 can be telescopic perpendicular to the belt surface of the conveyor belt 81. The second telescopic device 86 is used to extend perpendicular to the belt surface of the conveyor belt 81 and block the corresponding conveying member from continuing to convey, so as to position the conveying member on the conveyor belt 81 outside the preset material picking position in the conveying direction.

[0058] like Figure 1 In the embodiment shown, three material trays 84 are arranged along the conveying direction on the same conveyor belt 81, and the first material tray 841, the second material tray 842 and the third material tray 843 are arranged from left to right in the direction shown in the figure. The second material tray 842 is located at the preset material picking position, and while the first telescopic device 83 blocks the second material tray 842, the first material tray 841 is blocked by the second telescopic device 86 on the left side of the first telescopic device 83, and the third material tray 843 is blocked by the second telescopic device 86 on the right side of the first telescopic device 83, so that the synchronization of the movement between the material trays 84 can be maintained, which is convenient for control, and the first material tray 841 can be prevented from continuing to move forward and hitting the second material tray 842, and the third material tray 843 can be prevented from falling from the conveyor belt 81.

[0059] Among them, when placing the conveying parts on the conveyor belt 81, the spacing between the conveying parts should be determined according to the setting positions of the first telescopic device 83 and the second telescopic device 86. Specifically, it should be ensured that during the conveying process, the first telescopic device 83 or the second telescopic device 86 does not collide with the corresponding conveying parts when extending.

[0060] Among them, optionally, refer to Figure 8 The first telescopic device 83 specifically includes a stop column 87 arranged on both sides of the conveyor belt 81 perpendicular to the conveying direction, and a telescopic driving device 88 connected to the stop column 87, so as to drive the stop column 87 to extend and retract perpendicular to the belt surface of the conveyor belt 81. The telescopic driving device 88 is electrically connected to the controller. The controller controls the stop column 87 by controlling the telescopic driving device 88. The telescopic driving device 88 can specifically be a cylinder or a motor. The stop columns 87 are arranged on both sides of the conveyor belt 81 to ensure the blocking effect on the conveying member. The second telescopic device 86 can be set to have the same structure as the first telescopic device 83.

[0061] Preferably, a pressure sensor can be provided at the top of the first telescopic device 83 and the second telescopic device 86, and the pressure sensor is electrically connected to the controller. The controller controls the corresponding first telescopic device 83 or the second telescopic device 86 to stop extending according to the detection result of the pressure sensor. When the pressure detected by the pressure sensor is greater than the set pressure, it proves that the corresponding telescopic device (the first telescopic device 83 or the second telescopic device 86) is blocked by the material tray 84 during the extension process, and there is an error in the placement position of the material tray 84. At this time, the controller controls the corresponding telescopic device to stop extending, which can avoid the overturning of the material tray 84 and has a protective effect on the corresponding telescopic device (the first telescopic device 83 or the second telescopic device 86).

[0062] Among them, preferably, please refer to Figure 8 , a first conveyor sensor 82 is also provided on the side of the conveyor belt 81. The first conveyor sensor 82 is used to sense the presence or absence of the material tray 84. When the material begins to pass through the first conveyor sensor 82 or when the material completely leaves the position of the first conveyor sensor 82, the first conveyor sensor 82 can send a corresponding signal to the controller. The controller is used to control the extension of the first telescopic device 83 according to the detection result of the first conveyor sensor 82 to block the movement of the material. Among them, the first conveyor sensor 82 and the corresponding first telescopic device 83 are arranged in sequence along the conveying direction of the conveyor belt 81. Based on the cooperation between the first conveyor sensor 82 and the first telescopic device 83, it is possible to more effectively prevent the material tray 84 from being conveyed to a position beyond the position of the first telescopic device 83, thereby effectively improving the accuracy of positioning and bringing convenience to subsequent work.

[0063] In a specific pad printing process, when the material tray 84 passes the first conveyor sensor 82, the first conveyor sensor 82 sends a signal to the controller, and the controller correspondingly controls the first telescopic device 83 to extend. When the material tray 84 carrying the material 1 moves to the position of the first telescopic device 83, it is blocked and cannot continue to pass. After that, the robot 7 takes the material 1 away for pad printing. In addition, the conveyor belt 81 can stop running after the first telescopic device 83 blocks the material tray 84 to avoid friction between the material at the preset material picking position and the conveyor belt 81, and ensure that the material 1 can move to the position against the telescopic device 83, and the conveyor belt 81 will start again after the material 1 is taken away by the robot 7.

[0064] Among them, a certain interval should preferably be set between the first conveyor sensor 82 and the corresponding first telescopic device 83 to ensure that the first telescopic device 83 is fully extended before the material tray 84 arrives. In addition, according to the distance relationship between the first conveyor sensor 82 and the first telescopic device 83, the controller can control the first telescopic device 83 to extend when receiving the detection result of the first conveyor sensor 82, or control the first telescopic device 83 to extend after a period of time after receiving the detection result of the first conveyor sensor 82.

[0065] Among them, for the retraction and reset control of the first telescopic device 83, the controller can specifically control the first telescopic device 83 to retract after the first telescopic device 83 is extended for a preset time length, or control the first telescopic device 83 to retract and reset when receiving a signal from the robot 7 to start picking up materials from a preset material tray 84.

[0066] More preferably, the second telescopic device 86 is electrically connected to a controller, and the controller can control the first telescopic device 83 and the second telescopic device 86 to telescope synchronously.

[0067] Furthermore, the material positioning device further includes a limiting guide rail 85, which is staggered with the conveyor belt 81 along a direction perpendicular to the conveying direction of the conveyor belt 81. The adjacent limiting guide rails 85 cooperate to guide the conveying member therebetween in the conveying direction of the conveyor belt 81.

[0068] Through the guiding function of the limiting guide rail 85, the limiting guide rail 85 can always limit the conveying member in a direction perpendicular to the conveying direction, thereby preventing the conveying member from tilting during the conveying process and improving the stability of the conveying.

[0069] Optionally, in the conveying direction perpendicular to the conveying belt 81, the number of conveying belts 81 between adjacent limiting guide rails 85 can be set according to actual needs. Figure 1In the embodiment shown, three limiting guide rails 85 form a double channel, adjacent limiting guide rails 85 form a conveying channel, each conveyor belt 81 in a conveying channel forms a conveyor belt group, and all conveyor belts 81 in a conveyor belt group cooperate to synchronously convey the conveyor member. Figure 1 As shown, the two conveyor belts 81 constitute a conveyor belt group, and the first material tray 841, the second material tray 842 and the third material tray 843 are pressed on the two conveyor belts 81 for conveying at the same time. Figure 1 As shown, each conveying channel supplies two pad printing components.

[0070] Preferably, the spacing between adjacent limiting guide rails 85 in a direction perpendicular to the conveying direction is adjustable, so as to adapt to the positioning requirements of different conveying parts.

[0071] Preferably, rollers may be provided on the side of the material tray 84 , so that the material tray 84 and the limiting guide rail 85 can form a rolling fit through the rollers, thereby reducing friction damage between the limiting guide rail 85 and the material tray 84 .

[0072] Furthermore, the manipulator 7 is provided with pad printing components on both sides in a straight line direction parallel to the conveying direction, and the manipulator 7 can transfer the material 1 between the pad printing components on either side and the material tray 84 at the preset material picking position. The technical solution of using one manipulator 7 to be responsible for picking up materials from the pad printing components on both sides is conducive to saving the overall space occupied by the equipment.

[0073] like Figure 1 As shown, in the direction shown in the figure, the conveying direction of the conveyor belt 81 is to the right, and a pad printing component is provided on each of the left and right sides of the manipulator 7. In a pad printing control process, the controller controls the manipulator 7 to take a material 1 to the left pad printing component for pad printing, and then immediately takes another material 1 to the right pad printing component for pad printing, which is beneficial to improving the pad printing efficiency. Alternatively, after the controller controls the manipulator 7 to take a material 1 to the left pad printing component for pad printing, the material 1 on the right pad printing component has just completed pad printing, and the controller controls the manipulator 7 to transfer the pad-printed material 1 on the right pad printing component back to the empty space of the material tray 84 at the preset material picking position, and then takes the material 1 to be pad-printed on the other material tray 84 to the right pad printing component for pad printing. Finally, after the material tray 84 at the preset material picking position is filled with the pad-printed material 1, it continues to be conveyed on the conveyor belt 81 to be conveyed to the rear equipment such as the oven behind the conveyor belt component 8.

[0074] Among them, optionally, the manipulator 7 can be a manipulator 7 that can rotate and move up and down for grabbing or sucking the material 1. More specifically, the manipulator 7 can be a manipulator 7 in a module, cylinder, or rotary cylinder combination mode, and can also be a module, or a DELTA robot, or a SCARA robot, or a six-axis robot.

[0075] For further information, please refer to Figure 1 The printing platform 65, the hot air box 61, the cleaning mechanism 62 and the oil cup assembly 63 are arranged in a direction perpendicular to the conveying direction and away from the conveyor belt assembly 8, as shown in FIG. Figure 1 As shown. The pad printing head can move above the printing platform 65, the hot air box 61, the cleaning mechanism 62 and the oil cup assembly in a direction perpendicular to the conveying direction, and the pad printing head can be lifted and lowered. Since the printing platform 65 is closest to the conveyor belt assembly 8 in the pad printing assembly, the distance that the manipulator 7 needs to move when transferring the material 1 between the printing platform and the conveyor belt assembly 8 can be reduced. Specifically, the pad printing head can be connected to a drive system to achieve a change in its position, and the drive system is electrically connected to a controller.

[0076] Of course, in other embodiments, the positional relationship of the printing platform 65, the hot air box 61, the cleaning mechanism 62, and the oil cup assembly 63 can be interchanged, and the printing platform 65, the hot air box 61, the cleaning mechanism 62, and the oil cup assembly 63 can also be arranged in sequence parallel to the conveying direction. In addition, in this embodiment, the material tray 84 can also be omitted, and each material tray 84 position on the conveyor belt is only provided with one material 1 as a conveying member.

[0077] Based on the above examples, please refer to Figures 5 to 7 The printing platform 65 includes a support seat 2 and a plurality of first platform positioning devices. The support seat 2 is used to support the material 1, and the supporting direction is the upward direction of the Z direction in the figure. The first platform positioning device is used to clamp and position the material 1 along the corresponding preset positioning direction perpendicular to the Z direction. Among them, each first platform positioning device corresponds to a preset positioning direction perpendicular to the Z direction as the direction for positioning the material 1. After the first platform positioning device clamps the material 1, the material 1 can be restricted from moving in the preset positioning direction corresponding to the first platform positioning device. By setting the first platform positioning device, it can be ensured that the material 1 will not shake during the pad printing process of the pad printing head, thereby ensuring the accuracy of the pad printing.

[0078] Furthermore, at least one first platform positioning device is an adjustable platform positioning device. Figure 7 As shown, the adjustable platform positioning device includes an adjustable positioning drive device, a first fixed positioning portion and an adjustable positioning portion. The first fixed positioning portion is fixed to the output portion of the adjustable positioning drive device, the adjustable positioning portion is rotatably connected to the output portion of the adjustable positioning drive device, and the rotation center of the adjustable positioning portion is parallel to the supporting direction of the support seat 2, that is, the rotation center extends along the Z direction. The first fixed positioning portion and the adjustable positioning portion are arranged on both sides of the support seat 2, and the first fixed positioning portion and the adjustable positioning portion can be driven by the adjustable positioning drive device to approach along the corresponding preset positioning direction to clamp and position the material 1.

[0079] It should be noted that if Figure 6As shown, in this application, the X direction, Y direction and Z direction are perpendicular to each other. In actual use, the X direction and Y direction are usually two straight directions on the horizontal plane, the Z direction is a straight direction perpendicular to the horizontal plane, and the support direction of the support seat 2 is perpendicular to the horizontal plane and upward.

[0080] On the printing platform 65, the material 1 is located on the support seat 2 between the first fixed positioning part and the adjustable positioning part. In the adjustable platform positioning device, the adjustable positioning drive device drives the first fixed positioning part and the adjustable positioning part to move closer to each other along the corresponding preset positioning direction (such as, Y direction). When clamping the material 1, due to the rotatable setting of the adjustable positioning part, the adjustable positioning part can push the material 1 to be close to the first fixed positioning part, and at the same time adjust its own angle so that the adjustable positioning part is also in close contact with the material 1.

[0081] It can be seen that in the preset positioning direction corresponding to the adjustable platform positioning device, the first fixed positioning part is used as a positioning reference, and the adjustable positioning part adaptively adjusts its own angle on the material 1 to adapt to the direction of the first fixed positioning part, so that the material 1 can be adaptively clamped by the adjustable positioning part and the first fixed positioning part for positioning, thereby avoiding the material 1 from shaking in this direction, which can effectively improve the reliability of positioning and is conducive to achieving precise centering positioning of the material 1.

[0082] The number of the first platform positioning devices can be set to one, two or more than two according to actual needs. When there is only one first platform positioning device, the first platform positioning device is an adjustable platform positioning device.

[0083] Wherein, optionally, Figure 7 As shown, the first fixed positioning portion includes a first fixed connecting rod 511 fixed to the output portion of the adjustable positioning drive device, and at least two first positioning columns 58 are fixed on the first fixed connecting rod 511 at intervals; the adjustable positioning portion includes an adjustable connecting rod 512 rotatably connected to the output portion of the adjustable positioning drive device, and the rotation center of the adjustable connecting rod 512 extends along the Z direction, and at least two second positioning columns 57 are fixed on the adjustable connecting rod 512 at intervals, and the second positioning columns 57 are used to cooperate with the first positioning columns 58 to clamp and position the material 1.

[0084] If a plate-like structure is directly used to contact and position one surface of the material 1, when the plate-like structure has a large processing error or the surface of the material 1 is a curved surface, it is difficult to ensure the contact area between the plate-like structure and the material 1. In this embodiment, at least two positioning posts are used to cooperate to position one surface of the material 1, and each positioning post can maintain good contact with different positions on the side of the material 1, thereby ensuring the positioning effect, and at the same time helping to save the material for making the connection part and reduce the difficulty of processing.

[0085] The number of the first positioning posts 58 and the second positioning posts 57 can be set to two, three, five or other numbers as needed. The number of positioning posts on the adjustable connecting rod 512 and the first fixed connecting rod 511 can be the same or different. In addition, on the same connecting rod, the spacing between adjacent positioning posts can be set according to actual needs. For details, please refer to Figure 7 , two second positioning posts 57 are fixedly arranged in parallel on the adjustable connecting rod 512, and two first positioning posts 58 are fixedly arranged in parallel on the first fixed connecting rod 511. The two second positioning posts 57 arranged on the adjustable connecting rod 512 and the rotation center of the adjustable connecting rod 512 are preferably arranged at equal intervals. In the process of clamping the material 1, the two first positioning posts 58 and the two second positioning posts 57 can both contact the material 1 through the adaptive swing adjustment of the adjustable connecting rod 512.

[0086] Furthermore, a rotation limiting structure 56 for limiting the rotation angle range of the adjustable positioning part is provided on the output part of the adjustable positioning drive device. By setting the rotation limiting structure 56, the rotation angle of the adjustable positioning part can be limited within a reasonable range, and the adjustable positioning part can be adjusted to a state of being close to the material 1 more quickly without swinging greatly during the positioning process.

[0087] Specifically, if Figure 7 As shown, the rotation limiting structure 56 includes limit blocks respectively arranged on both sides of the adjustable connecting rod 512. When the adjustable connecting rod 512 swings around its rotation center until it abuts against the limit blocks, it cannot continue to rotate in the original direction. Alternatively, the rotation limiting structure 56 may include an encoder connected to the adjustable connecting rod 512 and a cylinder fixed to the output part of the adjustable positioning drive device. The cylinder and the encoder are both electrically connected to a controller. The controller controls the piston rod of the cylinder to extend to block the adjustable connecting rod 512 according to the detection of the rotation angle of the adjustable connecting rod 512 by the encoder, thereby preventing the adjustable connecting rod 512 from continuing to rotate in the original direction.

[0088] Furthermore, the first platform positioning device further comprises a fixed platform positioning device. Preferably, the fixed platform positioning device is perpendicular to the preset positioning direction of the adjustable platform positioning device. Figure 6 As shown, the preset positioning direction of the fixed platform positioning device is the X direction, and the preset positioning direction of the adjustable platform positioning device is the Y direction. The fixed platform positioning device includes a fixed positioning drive device and two second fixed positioning parts fixed to the output part of the fixed positioning drive device, and the two second fixed positioning parts are arranged on both sides of the support seat 2 so as to approach along the corresponding preset positioning direction under the drive of the fixed positioning drive device to clamp and position the material 1.

[0089] Please refer to Figure 6, each second fixed positioning part is a third positioning column 49 fixed to the output part of the fixed positioning drive device. In the X direction, the two third positioning columns 49 cooperate to clamp and position the material 1. At this time, the two third positioning columns 49, the two first positioning columns 58 spaced apart along the X direction, and the two second positioning columns 57 spaced apart along the X direction can cooperate to clamp the material 1 in the middle. Of course, the number of the third positioning columns 49 in each second fixed positioning part can also be two or other values.

[0090] For rectangular material 1, take mobile phone glass as an example, the mobile phone glass is placed on the support seat 2 with its length parallel to the X direction and its width parallel to the Y direction. The fixed platform positioning device can be used to clamp the side corresponding to the short side for positioning. Since the side length is short, reliable positioning can be performed directly through the second fixed positioning part that cannot rotate around the Z axis. Further, the adjustable platform positioning device is used to clamp and position the side corresponding to the long side of the mobile phone glass, which can ensure the reliable positioning of the entire mobile phone glass and facilitate processing.

[0091] Furthermore, the fixed position of at least one second fixed positioning part on the output part of the fixed positioning drive device is adjustable, for example, adjustable along the Y direction or adjustable along the X direction, so that the relative positions of the two second fixed positioning parts can be adjusted as needed to improve applicability. After the second fixed positioning part adjusts its position on the output part of the fixed positioning drive device, the second fixed positioning part is fixed relative to the output part of the fixed positioning drive device.

[0092] For more information, see Figure 6 The third positioning column 49 is fixed on the first adjustable block 45, the first adjustable block 45 is fixed on the second adjustable block 44, the second adjustable block 44 is fixed on the output part of the fixed positioning drive device, and the first adjustable block 45 is screwed to different positions on the second adjustable block 44 along the Y direction to adjust the fixed position of the third positioning column 49. Alternatively, the second fixed positioning part can also be connected to the output part of the fixed positioning drive device through a cylinder, and the position adjustment of the second fixed positioning part is achieved by the extension and contraction of the cylinder, and the cylinder is controlled by a controller.

[0093] Furthermore, the heights of the adjustable positioning portion, the first fixed positioning portion and the second fixed positioning portion in the Z direction are adjustable, thereby improving the applicability of the printing platform 65 and adaptably adjusting the position of the positioning portion according to the position and thickness of the material 1 in the Z direction.

[0094] Specifically, each positioning column is a telescopic rod 48, so as to achieve the height adjustment of the corresponding positioning part in the Z direction. Taking the second fixed positioning part as an example, Figure 6As shown, the third positioning column 49 includes a fixed sleeve 47 fixed to the output part of the fixed positioning drive device and a telescopic rod 48 that can be extended or retracted in the Z direction relative to the fixed sleeve 47. The telescopic rod 48 and the fixed sleeve 47 can be connected by threading, clamping or other methods to be fixed together after adjusting the relative position in the Z direction. Alternatively, the height adjustment of the positioning part in the Z direction can also be achieved by arranging a cylinder that can be telescopic in the Z direction between the output part of the positioning drive device and the corresponding positioning part, and the cylinder is preferably controlled by a controller electrically connected to it.

[0095] Also, please refer to Figure 5 The printing platform 65 specifically includes a box body composed of a first support plate 31, a second support plate 32 arranged on the Z-upward side of the first support plate 31, and a peripheral plate arranged between the first support plate 31 and the second support plate 32. Each first platform positioning device is arranged in the box body and protected by the box body. The support seat 2 includes a jig base plate 22 arranged on the first support plate 31 outside the box body and a printing jig 21 arranged on the jig base plate 22, and the material 1 is arranged on the printing jig 21. A guide hole is arranged through the first support plate 31 in the Z direction to provide a movable space for the corresponding positioning column. The positioning column in each positioning device can extend out of the box body through the corresponding guide hole to position the material 1. Since the positioning column is adjustable in height in the Z direction, each positioning column can be retracted into the box body when not in use, which is beneficial to prolonging the service life of the positioning column.

[0096] Furthermore, the positioning drive device of each first platform positioning device includes a rotary drive and a screw-nut assembly connected to the output shaft of the rotary drive, and the screw-nut assembly can convert the rotary motion into a linear motion. The screw of the screw-nut assembly includes two threaded segments with opposite rotation directions, and the two positioning parts in the first platform positioning device are respectively connected to the nuts of the two threaded segments, so that the two positioning parts move synchronously in opposite directions along the corresponding preset positioning directions, thereby clamping and positioning the material 1 or releasing the material 1. At this time, the nut is the output part of the positioning drive device.

[0097] It should be noted that, in the present application, the positioning part can be an adjustable positioning part, a first fixed positioning part or a second positioning part. Specifically, when the first platform positioning device is an adjustable platform positioning device, the positioning drive device is an adjustable positioning drive device, and the two positioning parts are respectively an adjustable positioning part and a first fixed positioning part; when the first platform positioning device is a fixed platform positioning device, the positioning drive device is a fixed positioning drive device, and the two positioning parts are respectively two second fixed positioning parts; of course, the first platform positioning device can also be other first platform positioning devices in the platform that clamp and position the material 1 through the cooperation of two positioning parts.

[0098] By setting up such a positioning drive device, the driving efficiency of the positioning part can be effectively improved, and it is beneficial to save energy and equipment space. At the same time, in a first platform positioning device, when the movement distance of one positioning part is determined, due to synchronous movement, the movement distance of the other positioning part is also determined accordingly, which is convenient for controlling the movement distance of the positioning part.

[0099] Specifically, if Figure 6 and Figure 7 As shown, the fixed positioning drive device includes an X-axis motor 46 and an X-axis screw nut assembly, the X-axis screw nut assembly includes an X-axis screw 43, an X-axis guide rail 42 and an X-axis nut 410, the X-axis screw 43 and the X-axis guide rail 42 both extend in the X-axis, the X-axis nut 410 is slidably connected to the X-axis guide rail 42 extending in the X-axis to prevent the X-axis nut 410 from rotating on the X-axis screw 43, and the X-axis nut 410 is threadedly connected to the X-axis screw 43, and the rotational movement of the X-axis motor 46 can be converted into a linear movement of the X-axis nut 410 through the transmission of the X-axis screw 43 and the limiting of the X-axis guide rail 42. The output shaft of the X-axis motor 46 and the X-axis screw 43 can be connected by a synchronous belt assembly, or can be directly fixedly connected by a coupling or other means. The two second fixed positioning parts are fixed on the two X-axis nuts 410 respectively. Correspondingly, the adjustable positioning drive device includes a Y-axis motor 55 and a Y-axis screw nut assembly. The specific structure can refer to the above description of the X-axis motor 46 and the X-axis screw nut assembly and will not be repeated here. The two Y-axis nuts 514 are respectively connected to the adjustable positioning part and the first fixed positioning part.

[0100] Of course, in other embodiments, the positioning drive device may also include two linear actuators, which are respectively connected to the two positioning parts in the first platform positioning device, and the linear actuator can drive the positioning parts thereon to reciprocate linearly along the corresponding preset positioning directions, so as to realize the separate control of the two positioning parts in the first platform positioning device. Alternatively, the positioning drive device may be a bidirectional cylinder, and the two positioning parts in the first platform positioning device are respectively connected to the two piston rods of the bidirectional cylinder, and the bidirectional cylinder is preferably electrically connected to the controller, and the controller controls its start and stop.

[0101] Furthermore, each first platform positioning device also includes a positioning part sensor, which is used to sense the positioning part used to position the material 1 in the first platform positioning device, that is, the positioning part sensor can sense whether the positioning part moves within its sensing range, and the positioning part sensor can specifically be an infrared sensor, an ultrasonic sensor, etc. The positioning part sensor and the positioning drive device used to drive the positioning part in the first platform positioning device are electrically connected to the controller respectively, and the controller is used to control the start and stop of the corresponding positioning drive device according to the sensing result of the positioning part sensor. The positioning part sensor can determine the position of the corresponding positioning part by sensing the positioning part, thereby facilitating the controller to control the moving distance of the positioning part, and can ensure that each material 1 is positioned at the same position.

[0102] For a specific application, please refer to Figure 7 For the adjustable platform positioning device for Y-direction positioning, on one side of the first fixed positioning part in the X direction, the first Y-direction positioning part sensor 59 and the second Y-direction positioning part sensor 513 are sequentially arranged along the Y direction and close to the adjustable positioning part, and a Y-direction sensing sheet that matches the Y-direction positioning part sensor is fixedly arranged on the first fixed positioning part. In the process of moving close to the adjustable positioning part, when the second Y-direction positioning part sensor 513 senses the Y-direction sensing sheet, the controller controls the Y-direction motor 55 to stop, and the adjustable positioning part and the first fixed positioning part stop moving synchronously and clamp the material 1; when it is necessary to release the material 1, the controller controls the Y-direction motor 55 to start in the reverse direction, and the first fixed positioning part moves away from the adjustable positioning part. When the first Y-direction positioning part sensor 59 senses the Y-direction sensing sheet, the controller controls the Y-direction motor 55 to stop, and the adjustable positioning part and the first fixed positioning part stop moving synchronously. Among them, since the adjustable positioning part moves synchronously with the first fixed positioning part, it is only necessary to set the Y-direction positioning part sensor on one side of the first fixed positioning part, and the adjustable positioning part does not need to be matched with the Y-direction positioning part sensor. For the fixed platform positioning device for X-direction positioning, the setting method of the X-direction positioning part sensor 411 can refer to the above Y-direction positioning part sensor, and will not be repeated.

[0103] Furthermore, the support seat 2 is provided with an intermediate anti-collision block 33 on one side in the Z direction, and the intermediate anti-collision block 33 is provided between the positioning parts. Preferably, the intermediate anti-collision block 33 can be an elastic structure to reduce impact damage. The intermediate anti-collision block 33 separates the positioning parts moving toward the material 1, which can effectively protect the positioning parts and reduce impact damage between the positioning parts. Figure 7 As shown, due to the provision of the middle anti-collision block 33, no direct collision occurs between the adjustable positioning portion, the first fixed positioning portion and the two second fixed positioning portions.

[0104] Furthermore, the printing platform 65 is fixed on the output end of the second platform positioning device, and the second platform positioning device can drive the printing platform 65 to move in a direction perpendicular to the supporting direction to adjust the position of the printing platform 65. The first platform positioning device of the printing platform 65 can realize precise and repeated positioning of the material 1, and the second platform positioning device adjusts the overall position of the printing platform 65 and the material 1 thereon. In this way, automatic and precise alignment of the material 1 and the pad printing pattern can be realized through the above two positioning devices.

[0105] Specific as Figures 2 to 4 As shown, an XXY precision alignment platform 64 is preferably provided below the second support plate 325 as a second platform positioning device. The XXY precision alignment platform 64 adjusts the overall position of the printing platform 65 and the material 1 thereon. The XXY alignment platform includes a cross slide 642 equipped with a motor, two of which move in the X-axis direction and one moves in the Y-axis direction; if the two X-axis direction motors are driven in the same direction, the output end of the XXY precision alignment platform 64 can move along the positive and negative directions of the X-axis; if one Y-axis direction motor is driven alone, the output end of the XXY precision alignment platform 64 can move along the positive and negative directions of the Y-axis; if the three motors are driven simultaneously, the output end of the XXY precision alignment platform 64 can rotate with a certain rotation point as the rotation center.

[0106] A specific use process of the pad printing machine of this embodiment in glass pad printing is as follows:

[0107] The glass is placed in the material tray 84, and the conveyor belt drives the material tray 84 containing the glass to be transported in the specified conveying direction. When the glass moves to the preset material taking position, the telescopic device in front of the conveyor belt extends above the belt surface to block the glass to limit the glass from continuing to move forward;

[0108] The robot 7 moves downward to clamp the glass, then rises, and then moves toward the printing platform 65 until the glass is placed on the printing platform 65;

[0109] The first platform positioning device on the printing platform 65 positions and clamps the glass; at the same time, the XXY precision alignment platform 64 below the printing platform 65 adjusts the overall position of the glass;

[0110] The ink cup of the ink cup assembly 63 is inked in a groove matching the glass pad printing pattern, and then the excess ink is scraped away by a scraper;

[0111] The pad printing head descends to the groove of the ink cup assembly 63 to take ink, and then rises and moves to the hot air box 61 to blow the ink dry;

[0112] When the ink is dried to a specified degree, the pad printing head moves to the top of the glass of the printing platform 65 for printing;

[0113] The robot 7 takes away the printed glass and brings in new glass, and the pad printing head moves to the cleaning mechanism 62 to clean the ink on the pad printing head and proceed to the next cycle.

[0114] Obviously, the arrangement of the material positioning device is not limited to the method provided in the above embodiment. Fig. 9 and Fig.10 , the material positioning device includes a clamping device 810 and a first telescopic device 83 which are sequentially arranged along the conveying direction of the conveyor belt 81. In this embodiment, the conveying member may be only the material. The first telescopic device 83 can be telescopic along the belt surface perpendicular to the conveyor belt 81 and block the corresponding material 1 from continuing to be conveyed after being extended. The clamping device 810 can be telescopic parallel to the belt surface of the conveyor belt 81 and perpendicular to the conveying direction of the conveyor belt 81, and the clamping device 810 can clamp the material 1 after being extended to position the corresponding material 1 at a preset material picking position on the conveyor belt 81. Specifically, the first telescopic device 83 can prevent the material 1 from exceeding the preset material picking position in the conveying direction, and the clamping device 810 realizes the centering of the material 1 perpendicular to the conveying direction. The extension distance of the clamping device 810 is controlled according to the positional relationship between the material 1 and the conveyor belt 81 to adjust the crooked material 1 placed on the conveyor belt 81.

[0115] The first telescopic device 83 can prevent the material 1 from being conveyed beyond the preset material picking position, and the clamping device 810 can center the material 1, so that the robot 7 can pick up the material at a determined position, which is convenient for path planning of the robot 7, thereby improving the pad printing efficiency through the setting of the conveyor belt assembly, the material positioning device and the robot.

[0116] For further information, please refer to Fig.10 The material positioning device also includes a second conveyor sensor 89, which is used to sense the presence of the material 1. Specifically, it can be an infrared sensor, an ultrasonic sensor or other types of sensors. When the material 1 starts to pass through the sensor or when the material 1 completely leaves the position of the second conveyor sensor 89, the second conveyor sensor 89 can send a corresponding signal to the controller. The first telescopic device 83, the clamping device 810 and the second conveyor sensor 89 are electrically connected to the controller respectively. The controller is used to control the extension of the first telescopic device 83 and the clamping action of the clamping device 810 according to the detection result of the second conveyor sensor 89.

[0117] In a specific pad printing process, the material 1 is placed on the conveyor belt 81. When passing through the second conveyor sensor 89, the second conveyor sensor 89 sends a signal to the controller, and the controller controls the first telescopic device 83 to extend accordingly. When the material 1 moves to the position of the first telescopic device 83, it is blocked. The controller then controls the clamping device 810 to clamp the material 1. After positioning, the clamping device 810 releases the material 1, and the manipulator 7 takes the material 1 away for pad printing. In addition, the conveyor belt 81 can stop running after the first telescopic device 83 blocks the material 1 to avoid friction between the material at the preset material picking position and the conveyor belt 81, and ensure that the material 1 can move to the position against the first telescopic device 83, and then start again after the next material is placed on the conveyor belt 81.

[0118] Among them, a certain interval should preferably be set between the second conveyor sensor 89 and the first telescopic device 83 to ensure that the first telescopic device 83 is fully extended before the material 1 arrives. In addition, according to the distance relationship between the second conveyor sensor 89 and the first telescopic device 83, the controller can control the first telescopic device 83 to extend when receiving the detection result of the second conveyor sensor 89, or control the first telescopic device 83 to extend after a period of time after receiving the detection result of the second conveyor sensor 89. The clamping device 810 can be controlled to extend by the controller after the first telescopic device 83 is extended for a period of time.

[0119] For the retraction and reset control of the first telescopic device 83, the controller can specifically control the first telescopic device 83 to retract after the first telescopic device 83 is extended for a preset time. For the reset of the clamping device 810, the controller can specifically control the clamping device 810 to reset after the clamping device 810 is clamped for a preset time. More specifically, the clamping device 810 and the first telescopic device 83 can reset at the same time.

[0120] Among them, optionally, refer to Fig.10 The clamping device 810 includes clamping and positioning columns 8101 arranged on both sides of the conveyor belt 81, and two, three or other numbers can be arranged on each side. At least two clamping and positioning columns 8101 are arranged in sequence on each side of the conveyor belt 81 along the conveying direction. The clamping and positioning columns 8101 are connected to the clamping drive device 8102 to drive the clamping and positioning columns 8101 on both sides of the conveyor belt 81 to move in the opposite direction to clamp or release the material 1 perpendicular to the conveying direction. The clamping drive device 8102 is electrically connected to the controller, and the controller controls the clamping and positioning columns 8101 by controlling the clamping drive device 8102. The clamping drive device 8102 can be a cylinder or a motor.

[0121] It can be seen that based on the setting of the second conveying member sensor 89, a reliable reference can be provided for the extension timing of the first telescopic device 83 and the clamping device 810, thereby ensuring that the positioning operation is carried out effectively.

[0122] Furthermore, the conveyor belt assembly, the robot 7, and the pad printing assembly are electrically connected to the controller. The controller is used to control the movement of the robot 7 according to the operating conditions of the conveyor belt assembly and the pad printing assembly. When the controller receives a setting signal from the pad printing assembly or a setting signal from the conveyor belt assembly, the controller controls the movement of the robot, thereby achieving unified control of various components of the pad printing machine through the controller.

[0123] Specifically, the controller can control the robot 7 to move to the preset material picking position to pick up the material after a preset time period when the material 1 sensor detects that the material 1 is stored in the preset material picking position, or control the robot 7 to move to the preset material picking position to pick up the material when the clamping device 810 in the conveyor belt assembly releases the material 1; the controller can control the robot 7 to move to the pad printing assembly to pick up the material when the pad printing head in the pad printing assembly completes the pad printing operation or after a period of time after completing the pad printing operation.

[0124] Further, the conveyor belt 81 includes at least two belts 811 connected in sequence along the conveying direction. In general, the belt 811 includes an annular belt body and a pulley supported inside the annular belt body. Fig. 9 As shown, the conveyor belt 81 includes three belts 811 arranged in sequence along the conveying direction. Since each conveyor belt 81 is composed of at least two belts 811, it is convenient to maintain, transport and assemble the conveyor belt 81. In addition, the running speed and opening and closing conditions of each belt 811 can be controlled separately according to actual needs, which is conducive to improving the applicability of the conveyor belt 81. Of course, in other embodiments, the conveyor belt 81 may include 1, 5 or other numbers of positioning belts 811.

[0125] Furthermore, at least two conveyor belts 81 are arranged in sequence perpendicular to the conveying direction, and the material positioning devices on adjacent conveyor belts 81 are staggered in the conveying direction, thereby avoiding collision of the progressive device due to movement perpendicular to the conveying direction, or reducing collision between the robots 7 during the material picking and placing process.

[0126] It should be noted that, since the required operating conditions of each conveyor belt 81 may not be completely consistent, the controller preferably controls each conveyor belt 81 independently, and the conveyor belts 81 operate independently without affecting each other.

[0127] Furthermore, the printing platform 65, the hot air box 61, the cleaning mechanism 62 and the oil cup assembly 63 are sequentially arranged parallel to the conveying direction, such as Figure 1As shown. The pad printing head can move above the printing platform 65, the hot air box 61, the cleaning mechanism 62 and the oil cup assembly in a direction parallel to the conveying direction, and the pad printing head can move up and down. In addition, the pad printing assembly can correspond to a conveyor belt and a manipulator respectively, so that the pad printing assembly can obtain materials according to its own processing speed. Fig. 9 As shown, there are four pad printing components, four conveyor belts 81 and four manipulators 7, and the pad printing components, conveyor belts 81 and manipulators 7 are matched one by one. Of course, in other embodiments, the positional relationship of the printing platform 65, the hot air box 61, the cleaning mechanism 62, and the oil cup component 63 can be interchanged, and the printing platform 65, the hot air box 61, the cleaning mechanism 62, and the oil cup component 63 can also be arranged in sequence parallel to the conveying direction.

[0128] A specific use process of the pad printing machine of this embodiment in glass pad printing is as follows:

[0129] The conveyor belt 81 conveys the glass to be printed in the specified conveying direction. When the glass moves to the preset printing position, the first telescopic device 83 in front of the conveyor belt 81 rises to block the glass to restrict the glass from moving forward. Then, the clamping devices 810 on both sides of the conveyor belt move closer to the middle to clamp the glass to achieve the positioning of the glass.

[0130] The robot 7 moves downward to suck the glass, then rises, and then moves toward the printing platform 65 until the glass is placed on the printing platform 65;

[0131] The first platform positioning device and the second platform positioning device position the glass so as to achieve automatic and precise alignment between the glass and the printed pattern on the printing head;

[0132] The ink cup of the ink cup assembly 63 is inked in a groove matching the glass pad printing pattern, and then the excess ink is scraped away by a scraper;

[0133] The pad printing head descends to the groove of the ink cup assembly 63 to take ink, and then rises and moves to the hot air box 61 to blow the ink dry;

[0134] When the ink is dried to a specified degree, the pad printing head moves to the top of the glass of the printing platform 65 for printing;

[0135] The robot 7 sucks away the printed glass and takes a new glass, and the pad printing head moves to the cleaning mechanism 62 to clean the ink on the pad printing head, and then the next cycle is carried out.

[0136] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0137] The above is a detailed introduction to the pad printing machine provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A pad printing machine, characterized in that: include: A conveyor belt assembly (8), comprising a conveyor belt (81), wherein a material positioning device is provided on a side of the conveyor belt (81), wherein the material positioning device comprises a first telescopic device (83) provided on the side of the conveyor belt (81) and capable of being telescopically extended and retracted perpendicularly to the belt surface of the conveyor belt (81), wherein the first telescopic device (83) is used to block the continued transmission of a corresponding conveyor member containing material from the front after extending perpendicularly to the belt surface of the conveyor belt (81), so as to position the corresponding conveyor member at a preset material picking position on the conveyor belt (81) in the transmission direction of the conveyor belt (81); A pad printing assembly for performing pad printing operations and arranged on the side of the conveyor belt assembly (8), the pad printing assembly comprising a printing platform (65), a pad printing head and an oil cup assembly (63), the printing platform (65) comprising a support seat (2) for supporting a material (1) and a plurality of first platform positioning devices, each of the first platform positioning devices being used to clamp and position the material (1) along a corresponding preset positioning direction perpendicular to the supporting direction of the support seat (2); the printing platform is fixed to the output end of the second platform positioning device, the second platform positioning device being able to drive the printing platform (65) in a direction perpendicular to the supporting direction to adjust the position of the printing platform (65); the surface of the material (1) is a curved surface; a manipulator (7) for transferring the material in the conveyor between the pad printing assembly and the preset material taking position, wherein when the conveyor moves to the position where the first telescopic device (83) is located and blocks it, the manipulator (7) takes the material (1) away for pad printing; Wherein, on one side of the conveyor belt assembly (8), a robot arm (7) is arranged between two adjacent pad printing assemblies.

2. The pad printing machine according to claim 1, characterized in that: The material positioning device also includes a second telescopic device (86) disposed on the side of the conveyor belt (81) and capable of being telescopically extended and retracted perpendicularly to the belt surface of the conveyor belt (81), and is used to block the corresponding conveying member from continuing to convey after being extended perpendicularly to the belt surface of the conveyor belt (81), so as to position the conveying member on the conveyor belt (81) outside the preset material picking position in the conveying direction.

3. The pad printing machine according to claim 1, characterized in that: The material positioning device further comprises a limiting guide rail (85), wherein the limiting guide rail (85) and the conveyor belt (81) are arranged alternately along a direction perpendicular to the conveying direction; adjacent limiting guide rails (85) cooperate with each other to guide the conveying member therebetween in the conveying direction.

4. The pad printing machine according to claim 1, characterized in that: The material positioning device also includes a clamping device (810), and the clamping device (810) and the first telescopic device (83) are arranged in sequence along the conveying direction of the conveyor belt (81); the clamping device (810) can be telescopic parallel to the belt surface and perpendicular to the conveying direction and clamp the conveying member after being extended.

5. The pad printing machine according to claim 4, characterized in that: The material positioning device also includes a second conveying member sensor (89); the first telescopic device (83), the clamping device (810) and the second conveying member sensor (89) are respectively electrically connected to a controller; the second conveying member sensor (89) is used to sense the presence or absence of a conveying member; and the controller is used to control the extension of the first telescopic device (83) and the clamping action of the clamping device (810) according to the detection result of the second conveying member sensor (89).

6. The pad printing machine according to any one of claims 1 to 5, characterized in that: At least one of the first platform positioning devices is an adjustable platform positioning device, and the adjustable platform positioning device includes an adjustable positioning drive device, a first fixed positioning portion and an adjustable positioning portion, wherein the first fixed positioning portion is fixed to the output portion of the adjustable positioning drive device, and the adjustable positioning portion is rotatably connected to the output portion of the adjustable positioning drive device and the rotation center is parallel to the supporting direction, and the first fixed positioning portion and the adjustable positioning portion are arranged on both sides of the support seat (2) so as to approach each other along the corresponding preset positioning direction under the drive of the adjustable positioning drive device to clamp and position the material (1).

7. The pad printing machine according to claim 6, characterized in that: The first platform positioning device also includes a fixed platform positioning device whose preset positioning direction is perpendicular to the preset positioning direction of the adjustable platform positioning device; the fixed platform positioning device includes a fixed positioning drive device and two second fixed positioning parts fixed to the output part of the fixed positioning drive device, and the two second fixed positioning parts are arranged on both sides of the support seat (2) so as to approach each other along the corresponding preset positioning direction under the drive of the fixed positioning drive device to clamp and position the material (1).

8. The pad printing machine according to any one of claims 1 to 5, characterized in that: Each of the first platform positioning devices further comprises a positioning part sensor, wherein the positioning part sensor is used to sense a positioning part in the first platform positioning device for positioning the material (1), wherein the positioning part sensor and a positioning drive device in the first platform positioning device for driving the positioning part to move along a corresponding preset positioning direction are respectively electrically connected to a controller, wherein the controller is used to control the start and stop of the corresponding positioning drive device according to the sensing result of the positioning part sensor.

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