CN213891745U

CN213891745U - Pad printing machine

Info

Publication number: CN213891745U
Application number: CN202022251714.3U
Authority: CN
Inventors: 汤皓铃
Original assignee: Lens Intelligent Robot Changsha Co Ltd
Current assignee: Lens Intelligent Robot Changsha Co Ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-08-06
Anticipated expiration: 2030-10-10

Abstract

The utility model discloses a pad printing machine, include: the turntable mechanism comprises a turntable and a driving part for driving the turntable to rotate, the turntable is uniformly divided into a plurality of working positions along the circumferential direction of the turntable, a plurality of bases for placing printing parts are fixed on the turntable, and the bases rotate along with the turntable to correspond to different working positions; the feeding and discharging assembly corresponds to one of the working positions and is used for transferring the printing piece from the conveying device to the base rotating to the working position and transferring the printing piece subjected to pad printing from the base rotating to the working position to the conveying device; and the transfer printing components are respectively arranged corresponding to different working positions and used for transfer printing the printing piece rotated to the corresponding working position, and the transfer printing components and the feeding and discharging components respectively correspond to different working positions. Use the utility model provides a pad printing machine has a plurality of stations, can carry out the multiple pass pad printing, and need not repeated location when each pass pad printing, is showing and is improving work efficiency.

Description

Pad printing machine

Technical Field

The utility model relates to a bat printing machine technical field, more specifically say, relate to a bat printing machine.

Background

The pad printing machine is an ink printing device, is suitable for plastic cement, toys, glass, metal, ceramics, electronics, IC seal and the like, and is a main device for printing and decorating the surfaces of various objects at present. The transfer printing machine comprises the following process steps: the ink is first sprayed onto an etched plate and then the excess ink is scraped off with a retractable doctor blade. At this time, the solvent remaining in the ink in the etched area volatilizes and forms a gelatinous surface; then, the rubber head descends to the etching plate to absorb the ink; and finally, transferring most of the ink to an object to be printed through the rubber head. And the pad printing machine for pad printing the 3D glass of the mobile phone is required to have the highest precision.

Because the existing pad printing machine for pad printing 3D glass of the mobile phone can only pad print one pattern at a time, but actually, the 3D glass of the mobile phone needs to pad print a plurality of patterns. When the traditional pad printing machine is used for pad printing a plurality of patterns, a plurality of pad printing machines are required to be prepared, and different patterns are sequentially pad printed on the pad printing machines by glass, wherein the pad printing positions of the patterns are often inaccurate due to different clamping positioning positions when the pad printing machines are replaced each time; meanwhile, the labor cost and the time cost are greatly increased.

In summary, how to effectively solve the problems of low efficiency of pad printing multiple patterns by the conventional pad printing machine is a problem to be solved by those skilled in the art at present.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a pad printing machine, which can effectively solve the problem of low efficiency of pad printing multiple patterns in the conventional pad printing machine.

In order to achieve the above object, the utility model provides a following technical scheme:

a pad printer comprising:

the turntable mechanism comprises a turntable and a driving part for driving the turntable to rotate, the turntable is uniformly divided into a plurality of working positions along the circumferential direction of the turntable, a plurality of bases for placing printing parts are fixed on the turntable, and the bases rotate along with the turntable to correspond to different working positions;

the feeding and discharging assembly corresponds to one of the working positions and is used for transferring the printing piece from the conveying device to the base rotated to the working position and transferring the transfer-printed printing piece from the base rotated to the working position to the conveying device;

and the plurality of pad printing components are respectively arranged corresponding to the working positions and used for pad printing the printing bearing piece rotating to the corresponding working position, and the pad printing components and the feeding and discharging components are respectively corresponding to different working positions.

Preferably, in the pad printing machine, the pad printing machine further comprises a photographing component for acquiring the position of the printed material on the base and a position adjusting mechanism for adjusting the position of the printed material according to the result of the photographing component, wherein the photographing component corresponds to one of the plurality of working positions, and the working position is adjacent to the corresponding working position of the feeding and discharging component and is located behind the rotating direction of the corresponding working position of the feeding and discharging component.

Preferably, in the pad printing machine, the position adjusting mechanism includes a vacuum chuck for adsorbing the printing part, a first positioning platform connected to the vacuum chuck for adjusting the position of the vacuum chuck, and a jacking member connected to the first positioning platform for driving the first positioning platform to lift, and the base is provided with a through hole for the vacuum chuck to pass through so as to jack up the printing part.

Preferably, in the pad printing machine, the feeding and discharging assembly includes a manipulator for picking and placing and transferring the printing material.

Preferably, in the pad printing machine, the feeding and discharging assembly further includes a rough positioning mechanism for roughly positioning the printing object.

Preferably, in the pad printing machine, the pad printing assembly includes a support main body, a pad printing head mounted on the support main body, a first hot air pipe for drying ink on the pad printing head, a cleaning mechanism for cleaning ink on the pad printing head, and an ink cup assembly for inking the pad printing head, and the pad printing head is connected with the support main body through a second positioning platform, and the second positioning platform is used for adjusting the position of the pad printing head.

Preferably, the pad printing machine further comprises a second hot air duct arranged on the side surface of the support main body and used for drying the pad printing pattern on the printing member.

Preferably, in the pad printing machine, the second hot air pipes are respectively disposed on the left and right sides of the supporting body.

Preferably, in the pad printing machine, the number of the bases is the same as that of the working positions, the bases are arranged in a one-to-one correspondence manner, each pad printing assembly corresponds to two working positions, one working position is opposite to the pad printing head for pad printing, the other working position is staggered with the pad printing head for blow-drying, and the working positions for pad printing and the working positions for blow-drying are arranged at intervals in sequence.

Preferably, in the pad printing machine, the turntable is hollow and provided with a through hole, an installation frame with a regular polygon cross section is arranged in the through hole, each side corresponds to two of the working positions respectively, and the pad printing component is fixedly connected with the installation frame.

The utility model provides a bat printing machine includes carousel mechanism, goes up unloading subassembly and a plurality of bat printing subassemblies. The turntable mechanism comprises a turntable and a driving part for driving the turntable to rotate, a plurality of bases for placing printing parts are fixed on the turntable and evenly divided into a plurality of working positions along the circumferential direction of the turntable, and each base rotates along with the turntable to correspond to different working positions; the feeding and discharging assembly corresponds to one of the plurality of working positions and is used for transferring the printing piece from the conveying device to the base rotating to the working position and transferring the printing piece subjected to pad printing from the base rotating to the working position to the conveying device; the plurality of pad printing components are respectively arranged corresponding to different working positions and used for pad printing the printing piece which rotates to the corresponding working position, and the pad printing components and the feeding and discharging components respectively correspond to different working positions.

Use the utility model provides a pad printing machine, through a plurality of work positions of circumference evenly dividing along the revolving stage, go up the unloading subassembly and correspond with one of them work position, each pad printing subassembly corresponds with the work position of difference respectively, through going up the base that the printing piece on unloading subassembly with conveyer shifts to rotating to this work position, then the revolving stage rotates the base that makes placing the printing piece and rotates to next work position, when the work position that the subassembly corresponds at last unloading comes with the base, continue to place the printing piece. Along with the rotation of the rotary table, the base provided with the printing piece rotates to the working positions corresponding to different pad printing machines respectively so as to perform multi-pass pad printing. In conclusion, the pad printing machine provided by the application is provided with a plurality of stations, can perform multi-pass pad printing, does not need repeated positioning during each pass of pad printing, and obviously improves the working efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a pad printing machine according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a pad printing assembly;

fig. 3 is a schematic structural view of the position adjustment mechanism.

The drawings are numbered as follows:

carousel mechanism 1, mounting plate 2, bat printing subassembly 3, subassembly 4, mounting bracket 5, conveyer 6, unloading subassembly 7 on shooing, support frame 8, base 12, bat printing head 31, first hot-blast main 32, wiper mechanism 33, oil cup subassembly 34, first locating platform 35, second hot-blast main 36, jacking part 41, vacuum chuck 42, second locating platform 43, manipulator 71, thick positioning mechanism 72.

Detailed Description

The embodiment of the utility model discloses bat printing machine to improve the efficiency of multichannel pattern bat printing.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, fig. 1 is a schematic structural diagram of a pad printing machine according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a pad printing assembly; fig. 3 is a schematic structural view of the position adjustment mechanism.

In one embodiment, the present invention provides a pad printing machine, which comprises a turntable mechanism 1, a loading and unloading assembly 7 and a plurality of pad printing assemblies 3.

Wherein, carousel mechanism 1 includes the revolving stage and is used for driving revolving stage pivoted driver part, is fixed with a plurality of bases 12 that are used for placing the printing piece on the revolving stage, evenly divides into a plurality of work positions along the circumference of revolving stage, and each base 12 rotates along with the revolving stage with the work position that corresponds the difference. That is, the driving part drives the turntable to rotate, and each base 12 on the turntable rotates to correspond to different working positions, so as to perform different operations at each working position.

The loading and unloading assembly 7 corresponds to one of a plurality of working positions and is used for realizing the transfer of the printing piece between the conveying device 6 and the base 12 which rotates to correspond to the working position. That is, the printing part on the conveyer 6 is transferred to the base 12 of the working position corresponding to the feeding and discharging assembly 7 through the feeding and discharging assembly 7, and rotates along with the rotary table, the printing part on the base 12 is transferred to the working position corresponding to the feeding and discharging assembly 7 after being transfer printed by each transfer printing assembly 3, and then the feeding and discharging assembly 7 transfers the printing part which is transfer printed to the conveyer 6 through the base 12 corresponding to the feeding and discharging assembly 7. The transport device 6 can be embodied as a conveyor belt assembly, by means of which the print substrate in front of the pad printing machine is transported to the pad printing machine, processed by the pad printing machine and transported to the downstream device. The loading and unloading assembly 7 may specifically comprise a robot 71, which picks up and transfers the print medium by means of the robot 71.

The plurality of pad printing components 3 are respectively arranged corresponding to different working positions and used for pad printing of the printing piece rotated to the corresponding working position, and the pad printing components and the feeding and discharging components respectively correspond to different working positions. For the specific structure of the pad printing machine, please refer to the prior art, which is not described herein again. Through setting up a plurality of bat printing subassemblies 3, correspond with different work positions respectively, then base 12 rotates to the station that each bat printing subassembly 3 corresponds in proper order along with the rotation of revolving stage, carries out the bat printing respectively. After the printing piece is positioned on the base 12, because the position of each pad printing assembly 3 is determined, the position of the printing piece relative to the base 12 is determined, and the base 12 rotates to each pad printing assembly 3 in sequence without separately positioning.

Use the utility model provides a pad printing machine, through a plurality of work positions of circumference evenly dividing along the revolving stage, go up unloading subassembly 7 and one of them work position and correspond, each pad printing subassembly 3 corresponds with the work position of difference respectively, through going up the base 12 that the printing piece on unloading subassembly 7 with conveyer 6 shifts to rotating to this work position, then the revolving stage rotates and makes the base 12 of placing the printing piece rotate to next work position, when the work position that last unloading subassembly 7 corresponds had base 12 to change, continue to place the printing piece. With the rotation of the turntable, the base 12 with the printing piece is respectively rotated to the working positions corresponding to different pad printing machines to perform multi-pass pad printing. In conclusion, the pad printing machine provided by the application is provided with a plurality of stations, can perform multi-pass pad printing, does not need repeated positioning during each pass of pad printing, and obviously improves the working efficiency.

Further, still include the subassembly 4 of shooing that is used for acquireing the printing piece position on base 12 and be used for according to the position adjustment mechanism of the result adjustment printing piece position of subassembly 4 of shooing, the subassembly 4 of shooing corresponds with one in a plurality of workplaces, and the workplace that the subassembly 4 of shooing corresponds is adjacent and is located its rotation direction rear with last unloading subassembly 7 corresponding workplace. It should be noted that, the rear of the rotation direction, that is, along with the rotation of the base 12, passes through the working position corresponding to the feeding and discharging assembly 7 first, and then passes through the working position corresponding to the photographing assembly 4. That is, the photographing component 4, the loading and unloading component 7 and the pad printing component 3 correspond to different working positions respectively, the photographing component 4 and the loading and unloading component 7 correspond to two different working positions respectively, and each pad printing component 3 corresponds to the rest different working positions respectively. The base 12 receives the printing material when rotating to the working position corresponding to the loading and unloading assembly 7. Then the base 12 rotates to the working position corresponding to the photographing component 4, a coordinate system is established at the center position of the printing piece at the moment through the photographing component 4, and the position of the printing piece is adjusted through the position adjusting mechanism according to the result of the photographing component 4, so that each printing piece is subjected to pad printing at the same position. The photographing component 4 may be a CCD photographing mechanism. Through the setting of subassembly 4 and position control mechanism of shooing, be convenient for improve the bat printing precision.

Specifically, the position adjusting mechanism comprises a vacuum chuck 42 for adsorbing the printing piece, a first positioning platform 35 connected with the vacuum chuck 42 and used for adjusting the position of the vacuum chuck 42, and a jacking component 41 connected with the first positioning platform 35 and used for driving the first positioning platform 35 to lift, wherein a through hole for enabling the vacuum chuck 42 to penetrate to jack up the printing piece is formed in the base 12. The position adjusting mechanism is disposed under the base 12 on the working position corresponding to the photographing component 4, and the base 12 is provided with a through hole, so that when the position adjusting mechanism rotates to the working position corresponding to the photographing component 4, the jacking component 41 drives the vacuum chuck 42 to penetrate through the through hole to adsorb the printing material on the base 12, and then jacks up the printing material to leave the base 12. The vacuum chuck 42 is connected with the first positioning platform 35, so the position of the printing piece can be adjusted through the first positioning platform 35, so that the position of each printing piece on the base 12 is the same, and further the printing piece is in the same position in the subsequent pad printing process. The first positioning stage 35 may specifically adopt an XXY precision positioning stage, and the structure and working principle of the XXY precision positioning stage refer to the prior art, which is not described herein again. The adoption XXY precision positioning platform 35 can realize the accurate positioning of the printing piece, and improve the pad printing precision.

Specifically, the loading and unloading assembly 7 includes a robot 71 for picking and placing and transferring the printing material. For the detailed structure of the manipulator 71, reference is made to the prior art, and the detailed description thereof is omitted here. According to the requirement, the feeding and discharging component 7 can also adopt other combined structures such as a sucker and a moving part which can realize feeding and discharging in a conventional mode.

Further, the loading and unloading assembly 7 further comprises a rough positioning mechanism 72 for roughly positioning the printing element. The coarse positioning of the coarse positioning device 72 is used to perform a preliminary adjustment of the print substrate position. The rough positioning mechanism 72 may be a conventional rough positioning mechanism such as a belt conveyor, and is not limited in particular. The robot 71 moves downward to suck the print medium on the conveyor 6, then moves upward and moves in the direction of the coarse positioning mechanism 72 until the print medium is placed on the coarse positioning mechanism 72, and the print medium is adjusted to be within the visual field of the photographing assembly 4 by the adjustment of the coarse positioning mechanism 72. Then, the robot 71 sucks the print medium to move to the base 12 on the working position corresponding to the loading and unloading unit 7, and places the print medium on the base 12. The coarse positioning mechanism 72 is arranged to facilitate subsequent accurate positioning. Of course, the coarse positioning mechanism 72 may not be provided when the field of view of the camera assembly 4 is sufficient to capture the orientation of the print on the base 12.

In the above embodiments, the pad printing assembly 3 comprises a support body and a pad printing head 31 mounted on the support body, a first hot air pipe 32 for drying ink on the pad printing head 31, a cleaning mechanism 33 for cleaning the ink on the pad printing head 31, and an ink cup assembly 34 for inking the pad printing head 31, and the pad printing head 31 is connected with the support body through a second positioning platform 43, and the second positioning platform 43 is used for adjusting the position of the pad printing head 31. That is, the pad 31 is connected to the second positioning stage 43, and the center of the pad 31 is adjusted to be coincident with the center of the pattern on the steel plate by the second positioning stage 43. The second positioning stage 43 can specifically adopt an XXY precision positioning stage, and the structure and working principle of the XXY precision positioning stage refer to the prior art, which is not described herein again. The adoption XXY precision positioning platform can realize the accurate positioning of the printing piece, improves the bat printing precision. And a positioning device is not required to be arranged below the printing piece, so that the device has a compact structure. And through installing the second counterpoint platform on the bat printing head 31, make the pattern center counterpoint on bat printing head 31 and the steel sheet more accurate, the inking effect is better, and has reduced the time of manpower regulation, has eliminated artifical manual regulation and has moved the error of printing head 31.

Further, the second hot air duct 35 is disposed on the side of the support body for drying the pad printing pattern on the printing member. When the base 12 moves to an adjacent working position after completing pad printing from the work corresponding to the pad printing head 31, the second hot air duct 35 can blow dry the pattern on the printing object. Specifically, the left side and the right side of the support main body are respectively provided with the second hot air pipes 35 so as to blow dry the transfer printing patterns on the printing piece from two sides, and the efficiency is higher.

On the basis of the above embodiments, the number of the bases 12 is the same as the number of the working positions, and the bases are arranged in a one-to-one correspondence manner, each pad printing assembly 3 corresponds to two working positions respectively, one of the pad printing assemblies is just opposite to the pad printing head 31 for pad printing, the other pad printing assembly is staggered with the pad printing head 31 for drying, and the working positions for pad printing and the working positions for drying are arranged at intervals in sequence. Through with base 12 and each work position one-to-one, when the revolving stage rotated between each work position, each work position had base 12 for whole work beat has improved work efficiency. And base 12 passes through the just right shift printing of work position with bat printing head 31 in proper order, then through adjacent weather work position in order to weather, carries out the shift printing through the just right work position of next bat printing head 31, then through adjacent weather work position in order to weather, through the corresponding weather work position back of weather of last bat printing subassembly 3, gets into the work position that corresponds with last unloading subassembly 7, shifts the piece of undertaking the printing to conveyer 6 through unloading subassembly 7 on.

Further, the cavity of revolving stage has the through-hole, is provided with regular polygon's mounting bracket 5 in the through-hole, and each limit corresponds two work positions respectively, bat printing subassembly 3 and mounting bracket 5 fixed connection. Through the setting of mounting bracket 5, the installation of the bat printing subassembly 3 of being convenient for, and the personnel of being convenient for debug each bat printing subassembly 3, can not cause the hindrance to personnel's operation.

For a more clear description of the above solution, the mounting bracket 5 is illustrated as a regular hexagon.

The pad printing machine comprises a turntable mechanism 1, a mounting base plate, a pad printing component 3, a CCD photographing component 4, a mounting frame 5 and a feeding and discharging component 7.

Four corners on the mounting base plate are respectively provided with four supporting columns, and each supporting column is fixed on the mounting base plate. The mounting rack 5 is a regular hexahedron, and the top surface of the mounting rack 5 is fixedly connected with the support on the top surface of the support frame 8. And the pad printing assemblies 3 are correspondingly arranged on five of the six side surfaces of the mounting frame 5 respectively and are used for executing pad printing operation, and each pad printing assembly 3 is provided with different pad printing patterns. The pad printing component 3 is fixedly connected with the mounting frame 5 through a mounting plate.

The pad printing assembly 3 mainly comprises a pad printing head 31, a first hot air pipe for drying ink on the pad printing head 31, a cleaning mechanism 33 for cleaning ink on the pad printing head 31, and an ink cup assembly 34 for applying ink on the pad printing head 31. Carousel mechanism 1 sets up under mounting bracket 5, and evenly distributed has 12 bases 12 on the revolving stage on carousel mechanism 1, and 12 bases 12 correspond respectively along 12 work positions of circumference evenly distributed. One pad printing unit 3 corresponds to two work stations. The side surface of the mounting rack 5, which is not provided with the pad printing component 3, is provided with a CCD photographing component 4 and a feeding and discharging component 7. The CCD photographing component 4 and the feeding and discharging component 7 correspond to a working position respectively. The loading and unloading assembly 7 comprises a manipulator 71 and a rough positioning mechanism 72. A conveyor belt component is arranged on the side surface of the feeding and discharging component 7. The robot 71 is used to transfer material between the conveyor assembly and the coarse positioning mechanism 72, the base 12 on the turntable.

The pad printing machine is applied to glass pad printing, and the specific using process is as follows:

the printing piece, specifically like glass, transmits through the conveyer belt subassembly, and when glass removed to predetermineeing the material position of getting (through setting up the response piece), manipulator 71 moved downwards and withheld glass, then rises, moves toward thick positioning mechanism 72 direction, until placing glass on thick positioning mechanism 72, makes glass adjust to the field of vision scope that CCD was shot. Then the manipulator 71 sucks the glass to move towards the base 12 on the working position of the turntable corresponding to the loading and unloading mechanism until the glass is placed in the base 12;

along with the carousel rotates, glass rotates the below that CCD shoot subassembly 4, has installed a jacking part 41 under base 12, and jacking part 41 end is equipped with a vacuum chuck 42, holds glass through the vacuum, then leaves base 12 with glass jack-up, and the vacuum chuck 42 of jacking part 41 is connected with first locating platform 35, and first positioning mechanism dress is on jacking part 41. Taking a picture through a CCD, establishing a coordinate system at the positive center position of the glass at the moment, and performing pad printing on each piece of glass at the same position; then, the glass rotates to a corresponding working position of the first pad printing assembly 3, specifically to a working position opposite to the pad printing head 31 in two corresponding working positions of the first pad printing assembly 3;

a second positioning platform 43 is connected with the pad printing head 31, the center of the pad printing head 31 is adjusted to be consistent with the center of the pattern on the steel plate, meanwhile, an oil cup of the oil cup assembly 34 is used for inking in a groove matched with the glass pad printing pattern, and then a scraper is used for scraping off the redundant ink; the transfer printing head 31 descends to the groove of the oil cup assembly 34 to take ink, and then ascends to move to the first hot air pipe to blow the ink for drying; when the ink is dried to a specified degree, the pad printing head 31 moves to the position above the glass of the corresponding base 12 for printing (through the second positioning platform 43); the glass after transfer printing of one pattern continues to rotate to a working position on the side face of the transfer printing assembly 3 along with the turntable, namely, the drying working position is dried in the air, and then the glass is rotated to the corresponding position of the next transfer printing assembly 3 to perform the same operation, so that the printing of another pattern is completed; the pad head 31 that has just completed one pad printing moves to the cleaning mechanism 33 to clean the ink on the pad head 31 for the next cycle.

When the glass on which the pattern printing is completed is transferred to the loading and unloading assembly 7, the robot arm 71 takes off the glass, thus completing the whole process.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pad printing machine, comprising:

2. The pad printing machine according to claim 1, further comprising a photographing assembly for acquiring the position of the printing material on the base and a position adjusting mechanism for adjusting the position of the printing material according to the result of the photographing assembly, wherein the photographing assembly corresponds to one of the plurality of working positions, and the working position is adjacent to the working position corresponding to the feeding and discharging assembly and is located behind the rotating direction of the working position corresponding to the feeding and discharging assembly.

3. The pad printing machine according to claim 2, wherein the position adjusting mechanism comprises a vacuum chuck for adsorbing the printing element, a first positioning platform connected with the vacuum chuck for adjusting the position of the vacuum chuck, and a jacking component connected with the first positioning platform for driving the first positioning platform to lift, and a through hole for the vacuum chuck to pass through so as to jack up the printing element is formed in the base.

4. The pad printer as in claim 1, wherein the loading and unloading assembly includes a robot for picking and placing and transferring the print bearing.

5. The pad printer as recited in claim 4, wherein the loading and unloading assembly further comprises a coarse positioning mechanism for coarse positioning of the printing element.

6. The pad printing machine according to claim 1, wherein the pad printing assembly comprises a support body and a pad printing head mounted on the support body, a first hot air duct for drying ink on the pad printing head, a cleaning mechanism for cleaning the ink on the pad printing head, and an ink cup assembly for inking the pad printing head, and the pad printing head is connected with the support body through a second positioning platform for adjusting the position of the pad printing head.

7. The pad printing machine according to claim 6, further comprising a second hot air duct disposed on a side of the support body for drying the pad printing pattern on the printing member.

8. The pad printing machine according to claim 7, wherein said second hot air duct is provided on each of left and right sides of said supporting main body.

9. The pad printing machine according to any one of claims 1-8, wherein the number of the bases is the same as the number of the working positions and the bases are arranged in a one-to-one correspondence, each pad printing assembly corresponds to two working positions, one working position is opposite to a pad printing head for pad printing, the other working position is staggered with the pad printing head for drying, and the working positions for pad printing and the working positions for drying are arranged in sequence at intervals.

10. The pad printing machine according to claim 9, wherein the turntable is hollow and provided with a through hole, a mounting rack with a regular polygon cross section is arranged in the through hole, each side corresponds to two working positions respectively, and the pad printing assembly is fixedly connected with the mounting rack.