A pad printing machine

Abstract

This invention relates to a pad printing machine, comprising: a machine base, a pad printing device, and a first position recognition module; the pad printing device includes: a carrier unit, a product fixture, a fixture coarse positioning module, a fixture correction module, and an impression module, with an inking module and a pad cleaning module adjacent to the impression module; the fixture correction module includes: a first position recognition component and a correction component; the impression module includes: a pad assembly and a lifting component; the fixture coarse positioning module, the correction component, and the lifting component are respectively located below the carrier unit; the fixture coarse positioning module is used to coarsely position the product fixture; the first position recognition component is used to collect the positional deviation of the product fixture or the product on the product fixture, and the correction component performs positional correction based on the positional deviation; the lifting component is used to lift the product fixture, and the pad assembly impressions the product on the product fixture. This solution enables more accurate and reliable pad printing operations, greatly improving product yield.

Description

Technical Field

[0001] This invention relates to the field of pad printing technology, and more particularly to a pad printing machine. Background Technology

[0002] Pad printing is a type of printing method that can print text, graphics, and images on irregularly shaped objects. Pad printing machines typically have a printing head made of silicone rubber. This head is dipped in ink with a pre-set printing pattern and pressed up and down on the corresponding position on the material to be printed. To ensure printing quality, the machine positions the material before printing, ensuring it's in a preset position for easy alignment by the printing head. Furthermore, to achieve automated, assembly-line processing, pad printing machines usually include loading and unloading mechanisms, reducing labor costs.

[0003] In the pad printing process, since the target products are often small in size and the printing surface is the surface, maintaining the precise and consistent position of the product and / or fixture throughout the entire process is the key to improving the product yield. Therefore, improving the pad printing accuracy is an urgent problem to be solved.

[0004] Furthermore, in current pad printing equipment, the product or / or fixture is often fixed on the support structure and then not removed. When the pad printing head presses the product, the pressure is directly transmitted to the support structure. Over time, this can lead to problems such as unstable operation and skewness of the support structure. Even if the product and fixture are accurately positioned during the feeding process, the deviation of the support structure can easily lead to defective products. Therefore, how to solve the problem of separation from the support structure during printing and ensure the accurate positioning of the product and fixture has become another urgent problem to be solved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a pad printing machine.

[0006] To achieve the above-mentioned objectives, the present invention provides a pad printing machine, comprising: a machine base, a pad printing device disposed on the machine base, and a first position recognition module disposed on the edge of the machine base;

[0007] The pad printing device includes: a carrier unit, a product fixture detachably connected to the carrier unit, a fixture coarse positioning module, a fixture correction module and an imprinting module arranged sequentially along the running direction of the carrier unit, and an inking module and a pad cleaning module adjacent to the imprinting module.

[0008] The fixture calibration module includes: a first position recognition component, and a calibration component disposed below the first position recognition component;

[0009] The imprinting module includes: a glue head assembly, and a lifting assembly disposed below the glue head assembly;

[0010] The fixture coarse positioning module, the correction component, and the lifting component are respectively located below the bearing unit;

[0011] The fixture coarse positioning module is used to coarsely position the product fixture.

[0012] The first position recognition component is used to collect the positional deviation of the product fixture or the product on the product fixture, and the correction component performs positional correction based on the positional deviation;

[0013] The lifting assembly is used to lift the product fixture, and the rubber head assembly presses the product on the product fixture.

[0014] According to one aspect of the invention, the rubber head assembly is provided with at least one rubber head lifting mechanism;

[0015] The printing head lifting mechanism is equipped with a printing head for pressing.

[0016] The lifting assembly is provided with a fixture connector for connecting to the product fixture and a pressure sensor for sensing the product pressure on the product fixture;

[0017] The lifting assembly lifts the product fixture based on the fixture connector to disengage the product fixture from the carrying unit;

[0018] The rubber head lifting mechanism presses the product on the product fixture based on the rubber head, and controls the pressure of the rubber head based on the pressure feedback from the pressure sensor.

[0019] According to one aspect of the invention, the rubber head assembly further includes: a first rotational support;

[0020] The first rotating support is connected to a plurality of the rubber head lifting mechanisms, and the plurality of rubber head lifting mechanisms are arranged at equal intervals on the first rotating support;

[0021] The rubber head lifting mechanism includes: a first driver, a first transmission device, a first two-dimensional adjustment platform, and a rubber head mounting base;

[0022] The first driver, the first transmission device, the first two-dimensional adjustment platform, and the rubber head mounting base are installed sequentially from top to bottom;

[0023] The first driver drives the first two-dimensional adjustment platform and the rubber head mounting base to move in the vertical direction via the first transmission.

[0024] According to one aspect of the invention, the lifting assembly further includes: a second drive, a second transmission, and a connector mounting base;

[0025] The second driver, the second transmission, and the connector mounting base are connected in sequence from bottom to top;

[0026] The second driver drives the connector mounting base to move vertically via the second transmission;

[0027] The fixture connector is detachably connected to the connector mounting base.

[0028] According to one aspect of the present invention, the bearing unit includes: a second rotating support, a fixture bearing disk connected to a rotating shaft of the second rotating support, and a vacuum source connection assembly mounted on the fixture bearing disk;

[0029] The fixture support plate is provided with multiple fixture mounting slots for mounting the product fixture;

[0030] The bottom surface of the fixture mounting groove is embedded with a plurality of electromagnets for adsorbing the product fixture and a contact switch mechanism for controlling the on and off of the electromagnets. A first channel and a second channel are provided on the bottom surface of the fixture mounting groove.

[0031] The fixture coarse positioning module passes through the first channel to perform coarse positioning of the product fixture;

[0032] The calibration component and the lifting component are respectively connected to the product fixture through the second channel.

[0033] According to one aspect of the present invention, the product fixture includes: a fixture body;

[0034] The upper side of the fixture body is provided with at least one workstation for product installation;

[0035] An adsorption groove for adsorbing products is provided at the workstation.

[0036] A vacuum channel is provided inside the fixture body. One end of the vacuum channel is connected to the adsorption groove, and the other end of the vacuum channel forms a connection opening on the circumferential side of the fixture body for connecting the vacuum source connection assembly.

[0037] The circumferential side of the fixture body is provided with a plurality of coarse positioning grooves for the coarse positioning module of the fixture, and the middle of the fixture body is provided with a middle positioning hole that is nested and connected to the fixture connector.

[0038] The coarse positioning groove is arranged corresponding to the first channel on the bottom surface of the fixture mounting groove, and the intermediate positioning hole is arranged corresponding to the second channel on the bottom surface of the fixture mounting groove.

[0039] According to one aspect of the present invention, the fixture body is further provided with a linkage control mechanism;

[0040] The arrangement direction of the linkage control mechanism is consistent with the radial direction of the intermediate positioning hole;

[0041] The linkage control mechanism includes: a linkage telescopic rod and a linkage compression spring;

[0042] The linkage telescopic rod includes: a rod body, a stop part, and a lever part;

[0043] Along the axial direction of the rod portion, the abutting portion is provided at one end of the rod portion, and the actuating portion is provided on the radially outer side near the other end of the rod portion;

[0044] The abutting part protrudes from the inner side of the intermediate positioning hole, and the actuating part protrudes from the lower side of the fixture body;

[0045] When the fixture connector is nested with the intermediate positioning hole, the abutting part retracts, and the toggle part presses against the contact switch mechanism.

[0046] According to one aspect of the invention, the jig coarse positioning module includes: a third driver, a third actuator, and a gripper mechanism;

[0047] The third driver, the third transmission device, and the gripper mechanism are connected sequentially from bottom to top;

[0048] The gripper mechanism includes: a gripper base, a gripper assembly slidably connected to the gripper base, and a gripper drive connected to the gripper assembly;

[0049] The gripper assembly is provided with multiple grippers;

[0050] The gripper assembly includes two symmetrical grippers that can move relative to each other;

[0051] The gripper includes: a horizontal connecting arm, and a fixture positioning rod and a sliding connector respectively connected to opposite ends of the horizontal connecting arm;

[0052] The fixture positioning rod is vertically installed on the upper side of the horizontal connecting arm, and the sliding connector is connected to the lower side of the horizontal connecting arm.

[0053] The sliding connector is slidably connected to the gripper base;

[0054] The gripper drive is connected to the sliding connector;

[0055] The sliding direction of the sliding connector relative to the gripper base is consistent with the length direction of the horizontal connecting arm.

[0056] According to one aspect of the present invention, the correction assembly includes: a first X-axis translation structure, a first Y-axis translation structure, a first Z-axis translation structure, an angle adjustment structure, and an adsorption structure;

[0057] Along the vertical direction, the first X-axis translation structure, the first Y-axis translation structure, and the first Z-axis translation structure are arranged sequentially;

[0058] The angle adjustment structure is mounted on the first X-axis translation structure;

[0059] The adsorption structure is supported on the angle adjustment structure;

[0060] The adsorption structure is used to adsorb and fix the product fixture or the product on the product fixture.

[0061] The axial direction of the angle adjustment structure is consistent with the moving direction of the first Z-axis translation structure, and the angle adjustment structure is used to drive the adsorption structure to swing within a preset angle range.

[0062] According to one aspect of the present invention, the inking module includes: a pad printing plate assembly and a component adjustment support for adjusting the position of the pad printing plate assembly;

[0063] The component adjustment support includes: a second X-axis translation structure and a second Y-axis translation structure;

[0064] The second X-axis translation structure is supported on the second Y-axis translation structure, and the pad printing plate assembly is supported on the second X-axis translation structure;

[0065] The pad printing device further includes: a product detection unit and a pad detection unit;

[0066] Along the running direction of the carrying unit, the product testing unit is disposed downstream of the imprinting module at a distance from the imprinting module;

[0067] The glue head detection unit is arranged adjacent to the imprinting module;

[0068] Multiple pad printing devices can be installed on the machine base.

[0069] According to one aspect of the present invention, this approach involves setting a first position identification module during the loading stage, and then sequentially setting a fixture coarse positioning module and a fixture correction module after the product clamping is completed to further optimize the alignment of the product or fixture. This approach enables multiple product position calibration and optimizations during the loading and pad printing stages, allowing for more accurate and reliable pad printing operations and significantly improving product yield.

[0070] According to one aspect of the present invention, this method employs a controlled pressing process by lifting the fixture during pad printing, which allows for real-time and precise control of stress during the pressing process, thus more effectively ensuring the accuracy and reliability of the pressing operation. Furthermore, the separation of components from the carrier unit during the pressing process protects the carrier unit from pressure, thereby also effectively ensuring the accuracy and reliability of the transfer process.

[0071] According to one aspect of the present invention, this solution enables the linkage control of detachment and lifting during the pad printing process, which fully ensures the uniformity of the product fixture position during the replacement of the support structure. This allows the solution to always maintain the precision of the fixture position, providing a reliable guarantee for ensuring the printing accuracy of the product.

[0072] According to one aspect of the present invention, arranging the pressure sensors on the edge of the disk allows the distribution of the pressure sensors to be far from the axis. This enables more accurate sensing of whether there is any skew in the pressure on the product fixture through multi-point measurement, which is more beneficial for more precise control of the pressure in the pad printing process and provides a reliable guarantee for improving product quality and yield.

[0073] According to one aspect of the present invention, by further providing a boss adsorption groove on the intermediate positioning hole, the product fixture can still have sufficient fixing means in the lifting state, realizing the consistency of the product fixture position before and after lifting, thereby effectively ensuring the product imprinting yield of the present invention.

[0074] According to one aspect of the present invention, by selecting a boss adsorption groove on the intermediate positioning hole, this approach ensures the positioning accuracy and reliability between the product fixture and the second cylindrical boss, while also facilitating the disengagement of the second cylindrical boss during descent. Since the second cylindrical boss moves axially during disengagement, the radial adsorption force has minimal impact on the axial movement. This makes it easier to maintain the stability of the product fixture's position during the disengagement of the second cylindrical boss until the electromagnet regenerates the adsorption force, thereby achieving consistent and unified positioning of the product fixture before and after lifting.

[0075] According to one aspect of the present invention, by arranging the first X-axis drive and the first X-axis platform side by side, the vertical height of the first X-axis translation structure is effectively reduced. This results in a smaller space occupation of the first X-axis translation structure in the vertical direction, which is more beneficial to reducing the overall height of the correction component and makes it easier to install under the product carrier platform, thus ensuring its ease of use.

[0076] According to one aspect of the present invention, the pad printing plate assembly can be flexibly adjusted via component adjustment support to adapt to different pad lifting mechanisms, thereby ensuring the accuracy of the pad printing pattern. Attached Figure Description

[0077] Figure 1 This is a structural diagram of a pad printing machine according to one embodiment of the present invention;

[0078] Figure 2 This is a structural diagram of a fixture calibration module according to one embodiment of the present invention;

[0079] Figure 3 This is a structural diagram of an imprinting module according to one embodiment of the present invention;

[0080] Figure 4 This is a diagram showing the connection structure between the first two-dimensional adjustment platform and the rubber head according to one embodiment of the present invention;

[0081] Figure 5 This is a structural diagram of a first two-dimensional adjustment platform according to one embodiment of the present invention;

[0082] Figure 6 This is a structural diagram of a fixture connector according to one embodiment of the present invention;

[0083] Figure 7 This is a cross-sectional view of a support unit according to one embodiment of the present invention;

[0084] Figure 8 This is a partially enlarged view of the fixture support plate according to one embodiment of the present invention;

[0085] Figure 9 This is a structural diagram of a product fixture according to one embodiment of the present invention;

[0086] Figure 10 A cross-sectional view of a product fixture according to one embodiment of the present invention;

[0087] Figure 11 This is a structural diagram of a linkage control mechanism according to one embodiment of the present invention;

[0088] Figure 12 This is a cross-sectional view of a linkage control mechanism according to one embodiment of the present invention;

[0089] Figure 13 This is a structural diagram of a switch movable part according to one embodiment of the present invention;

[0090] Figure 14 This is a cross-sectional view of the connection state of the fixture connector, fixture support plate, and product fixture according to one embodiment of the present invention;

[0091] Figure 15 This is a diagram showing the arrangement of the boss adsorption grooves according to another embodiment of the present invention;

[0092] Figure 16 This is a structural diagram of a jig coarse positioning module according to one embodiment of the present invention;

[0093] Figure 17 This is a structural diagram of a correction component according to one embodiment of the present invention;

[0094] Figure 18 This is a side view of a correction component according to one embodiment of the present invention;

[0095] Figure 19 This is a structural diagram of a component adjustment support according to one embodiment of the present invention. Detailed Implementation

[0096] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described in detail here, but the embodiments of the present invention are not limited to the following embodiments.

[0097] like Figure 1 As shown, according to one embodiment of the present invention, a pad printing machine includes: a machine base 1, a pad printing device 2 disposed on the machine base 1, and a first position recognition module 3 disposed at the edge of the machine base 1. In this embodiment, the machine base 1 can be configured as a frame-type machine base with a regular shape. The upper table surface is used to arrange various unit mechanisms that need to be installed on the upper side, while its interior provides space to accommodate the remaining structures, so that the entire pad printing machine has a compact structure. In this embodiment, the first position recognition module 3 can be configured as a visual recognition device integrating image acquisition and recognition. It can be installed on the side of the machine base 1 with the image acquisition end facing upward. Thus, the product to be pad printed is moved above the first position recognition module 3 under the picking action of the feeding mechanism, thereby achieving initial recognition and positioning of the product's position and posture. Then, by feeding back the output results to the feeding mechanism, the product's position and posture can be adjusted based on the feeding mechanism, and the product can be accurately placed on the corresponding structure of the pad printing device 2. In this embodiment, the product-picking feeding mechanism can be implemented using a multi-degree-of-freedom robotic arm, which can be connected to the pad printing machine of this solution through corresponding ports, thereby realizing automated control of the product feeding process.

[0098] In this embodiment, the pad printing device 2 includes: a carrier unit 21, a product fixture 22 detachably connected to the carrier unit 21, a fixture coarse positioning module 23, a fixture calibration module 24, and an impression module 25 arranged sequentially along the running direction of the carrier unit 21, and an inking module 26 and a pad cleaning module 27 adjacent to the impression module 25; wherein, see Figure 2 The fixture calibration module 24 includes: a first position recognition component 241, and a calibration component 242 disposed below the first position recognition component 241; see also Figure 3 The imprinting module 25 includes: a glue head assembly 251, and a lifting assembly 252 disposed below the glue head assembly 251; furthermore, the fixture coarse positioning module 23, the correction assembly 242, and the lifting assembly 252 are respectively located below the support unit 21; thus, during the operation of the support unit 21, the product fixture 22 mounted on it can pass through the fixture coarse positioning module 23, the correction assembly 242, and the lifting assembly 252 in sequence, wherein the fixture coarse positioning module 23 is used to coarsely position the product fixture 22 so that the product fixture 22 is positioned correctly on the support unit 21. The position is optimized for the first time to make it easier to perform further position optimization in the fixture correction module 24. Specifically, the first position recognition component 241 is used to collect the positional deviation of the product fixture 22 or the product on the product fixture 22, and the correction component 242 performs positional correction based on the positional deviation. After the fixture position is optimized by the fixture correction module 24, it can achieve accurate alignment during imprinting. Then, the lifting component 252 can accurately lift the product fixture 22, and the glue head component 251 accurately imprints the product on the product fixture 22, effectively ensuring the imprinting accuracy of this solution.

[0099] Combination Figure 1 and Figure 3As shown, according to one embodiment of the present invention, the glue head assembly 251 is provided with at least one glue head lifting mechanism 251a; wherein, the lower end of the glue head lifting mechanism 251a is provided with a glue head 251aa for imprinting, and correspondingly, the glue head 251aa can be configured as an elastic structural component to achieve matching with the product surface, thereby achieving a corresponding precise imprinting effect. In this embodiment, the product fixture 22 can be detachably installed at a corresponding position on the support unit 21, thereby allowing for replacement and matching of the product fixture 22 according to different products, thus greatly improving the flexibility of use of the present invention. In this embodiment, the lifting assembly 252 is provided with a fixture connector 252a for abutting against the product fixture 22 and a pressure sensor 252b for sensing the product pressure on the product fixture 22; wherein, the fixture connector 252a can be configured as a solid structure with high hardness, such as a metal structure. In this embodiment, the lifting assembly 252 lifts the product fixture 22 based on the fixture connector 252a to detach the product fixture 22 from the support unit 21. In this embodiment, the pressure sensor 252b can be integrated into the fixture connector 252a. Thus, the fixture connector 252a can abut against the product fixture 22 to sense the corresponding pressure, thereby ensuring timely feedback of the read data. Furthermore, during the process of the rubber head lifting mechanism 251a imprinting the product on the product fixture 22 based on the rubber head 251aa, the pressure of the rubber head 251aa can be controlled by the pressure value fed back by the pressure sensor 252b.

[0100] like Figure 3 As shown, according to one embodiment of the present invention, the glue head lifting mechanism 251a further includes: a first driver 251a1, a first transmission device 251a2, a first two-dimensional adjustment platform 251a3, and a glue head mounting base 251a4; wherein, the first driver 251a1, the first transmission device 251a2, the first two-dimensional adjustment platform 251a3, and the glue head mounting base 251a4 are connected sequentially from top to bottom; specifically, the first transmission device 251a2 controls the first two-dimensional adjustment platform 251a3 and the glue head mounting base 251a4 to reciprocate in the vertical direction under the action of the first driver 251a1. In this embodiment, the first driver 251a1 can be an electric mechanism (such as a servo motor, stepper motor, etc.) to accurately output the displacement amount and corresponding imprinting pressure that need to be controlled. Furthermore, the first transmission device 251a2 is configured as a mechanical transmission structure that converts the rotation of the first driver 251a1 into linear displacement. Specifically, it is based on a threaded screw to achieve the corresponding conversion effect, so as to accurately convert the output of the first driver 251a1 into a linear extension action.

[0101] Combination Figure 4 and Figure 5As shown, according to one embodiment of the present invention, the first two-dimensional adjustment platform 251a3 is used to realize displacement adjustment in the horizontal direction. Specifically, the first two-dimensional adjustment platform 251a3 includes: a first platform portion 251a3a, a middle portion 251a3b, and a second platform portion 251a3c; wherein, the first platform portion 251a3a and the second platform portion 251a3c are respectively located on the upper and lower sides of the middle portion 251a3b, and respectively adopt a sliding connection to realize displacement adjustment between them. In this embodiment, the first platform portion 251a3a includes: a first platform plate 251a3a1, a first sliding boss 251a3a2 provided on one side of the first platform plate 251a3a1 in the thickness direction, a first adjusting connecting seat 251a3a3 respectively provided in the first direction of the first platform plate 251a3a1, and a first position adjusting member 251a3a4 threadedly connected to the first adjusting connecting seat 251a3a3; wherein, the first platform plate 251a3a1 is a rectangular plate, and its overall thickness can be appropriately set according to the corresponding needs to ensure its overall structural strength; in addition, since it is necessary to ensure the overall support accuracy of the first two-dimensional adjusting platform 251a3, it is necessary to set the flatness, parallelism, etc. of the two sides of the first platform plate 251a3a1 in the thickness direction respectively.

[0102] In this embodiment, the first sliding boss 251a3a2 extends along the first direction of the first platform plate 251a3a1. Therefore, the position of the first platform plate 251a3a1 relative to the middle portion 251a3b can be adjusted based on the sliding engagement between the first sliding boss 251a3a2 and the middle portion 251a3b. Furthermore, the cross-sectional shape of the first sliding boss 251a3a2 is an isosceles trapezoid. The narrower upper surface of the first sliding boss 251a3a2 is fixedly connected to the lower side of the first platform plate 251a3a1. This allows for convenient sliding engagement between the first sliding boss 251a3a2 and the middle portion 251a3b while effectively restricting their degrees of freedom in the non-sliding direction.

[0103] Furthermore, the position of the first platform plate 251a3a1 is adjusted and restricted through the first adjustment connecting seat 251a3a3 and the first position adjustment member 251a3a4. In this embodiment, the first adjustment connecting seat 251a3a3 is a block structure with a connecting through hole and a connecting threaded hole. A threaded hole corresponding to the connecting through hole on the first adjustment connecting seat 251a3a3 is provided at the end of the first platform plate 251a3a1 in the first direction, so that the first adjustment connecting seat 251a3a3 can be fixedly installed at the end of the first platform plate 251a3a1 based on the threaded connector. In addition, the first position adjustment member 251a3a4 is achieved through... The threaded holes of the first adjusting connector 251a3a3 are used to achieve mutual engagement. The threaded holes of the first adjusting connector 251a3a3 are opposite to the middle portion 251a3b. Therefore, by rotating the first position adjusting member 251a3a4, the abutment between the end of the first position adjusting member 251a3a4 and the side of the middle portion 251a3b can achieve precise adjustment of the position between the first platform portion 251a3a and the middle portion 251a3b. Of course, based on the relative arrangement of the first position adjusting member 251a3a4, precise positioning of the relative position can be achieved under the support of the first adjusting connector 251a3a3. It should be noted that the first adjusting connector 251a3a3 can also be installed at the end of the middle portion 251a3b, thereby aligning the first position adjusting member 251a3a4 with the end of the first platform plate 251a3a1, achieving the same position adjustment.

[0104] In this embodiment, the second platform portion 251a3c includes: a second platform plate 251a3c1, a second sliding boss 251a3c2 provided on one side of the second platform plate 251a3c1 in the thickness direction, second adjusting connecting seats 251a3c3 respectively provided in the second direction of the second platform plate 251a3c1, and a second position adjusting member 251a3c4 threadedly connected to the second adjusting connecting seats 251a3c3; wherein, the second platform plate 251a3c1 is a rectangular plate, and its shape is consistent with the shape of the first platform plate 251a3a1. Furthermore, to ensure its overall structural strength, the overall thickness of the second platform plate 251a3c1 can be appropriately set according to corresponding needs; in addition, since it is necessary to ensure the overall support accuracy of the first two-dimensional adjusting platform 251a3, the flatness, parallelism, etc. of the two sides of the second platform plate 251a3c1 in the thickness direction need to be set respectively. Furthermore, the second direction is perpendicular to the first direction, thereby achieving positional adjustment in both directions.

[0105] In this embodiment, the second sliding boss 251a3c2 extends along the second direction of the second platform plate 251a3c1. Therefore, the position adjustment of the second platform plate 251a3c1 relative to the middle portion 251a3b can be achieved based on the sliding engagement between the second sliding boss 251a3c2 and the intermediate portion 251a3b. Furthermore, the cross-sectional shape of the second sliding boss 251a3c2 is an isosceles trapezoid. The narrower upper surface of the second sliding boss 251a3c2 is fixedly connected to the upper side of the second platform plate 251a3c1. This allows for convenient sliding engagement between the second sliding boss 251a3c2 and the intermediate portion 251a3b while effectively restricting their degrees of freedom in the non-sliding direction.

[0106] Furthermore, the position of the second platform portion 251a3c is adjusted and restricted through the provided second adjustment connector 251a3c3 and second position adjustment member 251a3c4. In this embodiment, the second adjustment connector 251a3c3 is a block structure with a connecting through hole and a connecting threaded hole. A threaded hole corresponding to the connecting through hole on the second adjustment connector 251a3c3 is provided at the end of the second platform portion 251a3c in the second direction, so that the second adjustment connector 251a3c3 can be fixedly installed at the end of the second platform plate 251a3c1 based on the threaded connector. In addition, the second position adjustment member 251a3c4 is connected to the second platform plate 251a3c1 through the second adjustment connector 251a3c3. The connecting threaded holes of the second adjusting connecting seat 251a3c3 are screwed together to achieve mutual engagement. The connecting threaded holes of the second adjusting connecting seat 251a3c3 are opposite to the middle portion 251a3b. Therefore, by rotating the second position adjusting member 251a3c4, the abutment action between the end of the second position adjusting member 251a3c4 and the side of the middle portion 251a3b achieves precise adjustment of the position between the second platform portion 251a3c and the middle portion 251a3b. Of course, based on the relative arrangement of the second position adjusting member 251a3c4, precise positioning of the relative position can be achieved under the support of the second adjusting connecting seat 251a3c3. It should be noted that the second adjusting connecting seat 251a3c3 can also be installed at the end of the middle portion 251a3b, thereby aligning the second position adjusting member 251a3c4 with the end of the second platform plate 251a3c1, achieving the same position adjustment.

[0107] In this embodiment, the middle portion 251a3b is generally rectangular, and its shape is consistent with that of the first platform plate 251a3a1, thereby achieving consistency in the shape of the first two-dimensional adjustment platform 251a3. In this embodiment, a scale for marking position adjustment can be provided on at least one of the first platform portion 251a3a, the middle portion 251a3b, and the second platform portion 251a3c, thereby achieving accurate calibration of the position adjustment.

[0108] Combination Figure 3 and Figure 4 As shown, according to one embodiment of the present invention, the rubber head mounting base 251a4 is generally plate-shaped and is connected to the first two-dimensional adjustment platform 251a3 by means of detachable connection; furthermore, in order to facilitate the installation of the rubber head 251aa, the rubber head 251aa and the rubber head mounting base 251a4 can be connected by a quick-release method.

[0109] like Figure 3 As shown, according to one embodiment of the present invention, the rubber head assembly 251 further includes: a first rotating support 251b; wherein, the first rotating support 251b includes: a first rotating drive 251b1 and a first rotating bearing structure 251b2 connected to the rotating shaft of the first rotating drive 251b1; further, the rubber head lifting mechanism 251a is connected to the first rotating bearing structure 251b2, thereby, the switching of the rubber head lifting mechanism 251a installed on the first rotating bearing structure 251b2 can be realized based on the operation of the first rotating drive 251b1; furthermore, in this embodiment, multiple rubber head assembly mounting positions can be provided on the first rotating bearing structure 251b2 to facilitate the installation of multiple rubber head lifting mechanisms 251a.

[0110] In this embodiment, the first rotating bearing structure 251b2 includes a cylindrical support 251b21 and a bottom connector; wherein the bottom connector is a plate-shaped structure and is installed on the rotating shaft of the first rotating drive 251b1 using a threaded connector. Further, two or four rubber head assembly mounting positions can be equally spaced along the circumference of the cylindrical support 251b21. To facilitate installation with the rubber head lifting mechanism 251a, a radially outward protrusion can be provided on the outer surface of the cylindrical support 251b21, and the side of the protrusion away from the cylindrical support 251b21 is machined to form a rubber head assembly mounting position for installing the rubber head lifting mechanism 251a. In this embodiment, the rubber head assembly mounting position can be set as a mounting plane parallel to the axial direction of the cylindrical support 251b21. In this embodiment, multiple mounting holes can be regularly arranged on the rubber head assembly mounting position, thereby allowing the rubber head lifting mechanism 251a to be pressed against the rubber head assembly mounting position using a threaded connector.

[0111] like Figure 3 As shown, according to one embodiment of the present invention, an abutment protrusion 251b211 is provided on the outer side of the cylindrical support 251b21 and adjacent to the rubber head assembly mounting position. Correspondingly, a correction protrusion 251a21 opposite to the abutment protrusion 251b211 is provided on the side of the first transmission 251a2. The abutment protrusion 251b211 and the correction protrusion 251a21 are arranged vertically (i.e., the abutment protrusion 251b211 is positioned opposite the correction protrusion 251a21). Above, or below the correction protrusion 251a21 (the abutting protrusion 251b211). Furthermore, threaded holes can be provided on the abutting protrusion 251b211 or the correction protrusion 251a21, and a correction bolt a can be installed corresponding to the threaded hole. Then, by abutting the correction bolt a against another protrusion, the vertical orientation of the first transmission device 251a2 can be precisely adjusted, which greatly ensures the verticality of the product imprinting direction, thus being more beneficial to improving the pressure control accuracy of the present invention.

[0112] like Figure 3 As shown, according to one embodiment of the present invention, the lifting assembly 252 is disposed below the rubber head lifting mechanism 251a. The lifting assembly 252 further includes a second driver 252c, a second transmission device 252d, and a connecting member mounting base 252e. Specifically, the second driver 252c, the second transmission device 252d, and the connecting member mounting base 252e are connected sequentially from bottom to top, and the components are installed using threaded connections. Thus, the second transmission device 252d controls the connecting member mounting base 252e to reciprocate vertically under the action of the second driver 252c. In this embodiment, the second driver 252c can be an electric mechanism (such as a servo motor, stepper motor, etc.) for precisely outputting the required displacement. Furthermore, the second actuator 252d is configured as a mechanical transmission structure that converts the rotation of the second driver 252c into linear displacement. Specifically, it is based on a threaded screw to achieve the corresponding conversion effect, accurately converting the output of the second driver 252c into a linear extension / retraction action. This precisely achieves the abutment between the fixture connector 252a and the lower side of the product fixture 22, allowing the product fixture 22 to be lifted to a preset height. In this embodiment, the connector mounting base 252e is configured as a regular plate, and the connector mounting base 252e uses a threaded connector to connect to the extension / retraction end of the second actuator 252d. Furthermore, the upper side of the connector mounting base 252e is provided with an engaging mounting protrusion.

[0113] like Figure 6As shown, according to one embodiment of the present invention, the fixture connector 252a includes a fixture connector portion 252a1 and a mounting base connector portion 252a2 arranged sequentially from top to bottom; wherein the fixture connector portion 252a1 and the mounting base connector portion 252a2 are coaxially arranged. In this embodiment, the fixture connecting portion 252a1 includes: a first connecting disc 252a11, a first cylindrical boss 252a12 coaxially disposed with the first connecting disc 252a11, and a second cylindrical boss 252a13 coaxially disposed with the first cylindrical boss 252a12. The radial dimension of the second cylindrical boss 252a13 is smaller than the radial dimension of the first cylindrical boss 252a12. Thus, the positioning connection between the fixture connector 252a and the product fixture 22 can be achieved by the first cylindrical boss 252a12 abutting against the bottom of the product fixture 22 and the second cylindrical boss 252a13 being inserted into the corresponding intermediate positioning hole 221e of the product fixture 22.

[0114] Furthermore, the mounting base connection portion 252a2 includes: a second connecting disc 252a21; wherein, on the side of the second connecting disc 252a21 away from the fixture connection portion 252a1, a disc positioning groove 252a22 is provided for nesting and positioning with the fitting mounting protrusion, so as to achieve precise positioning with the connector mounting base 252e while ensuring that they can be disassembled and replaced.

[0115] In this embodiment, a pressure sensor 252b can be installed between the first connecting disk 252a11 and the second connecting disk 252a21. The pressure sensor 252b is connected to the first connecting disk 252a11 and the second connecting disk 252a21 at its upper and lower ends, respectively, allowing for timely and accurate transmission of pressure from the first connecting disk 252a11 to the pressure sensor 252b. In this embodiment, the pressure sensors 252b are arranged at the edge of the disks (i.e., the first connecting disk 252a11 and the second connecting disk 252a21), and multiple sensors (e.g., 3 or 4) are evenly spaced along the circumference of the disks. This arrangement of the pressure sensors 252b at the edge of the disks allows their distribution to be away from the axis. Therefore, multi-point measurements can more accurately detect whether there is any pressure deviation on the product fixture 22, which is beneficial for more precise pressure control during the pad printing process and provides a reliable guarantee for improving product quality and yield.

[0116] Combination Figure 1 , Figure 3 , Figure 7 and Figure 8As shown, according to one embodiment of the present invention, the supporting unit 21 further includes: a second rotating support 211 and a fixture support plate 212 connected to the rotating shaft of the second rotating support 211, and a vacuum source connection assembly 213 mounted on the fixture support plate 212; wherein, the fixture support plate 212 is provided with a fixture mounting groove 2121 for mounting the product fixture 22; in this embodiment, a plurality of electromagnets 2121a for adsorbing the product fixture 22 and a contact switch mechanism 2121b for controlling the on and off of the electromagnets 2121a are embedded in the bottom surface of the fixture mounting groove 2121, and a first channel and a second channel are provided in the bottom surface of the fixture mounting groove 2121; wherein, the magnetic force generated by the electromagnets 2121a in the energized state can realize the reliable positioning of the product fixture 22. The contact switch mechanism 2121b is a normally closed contact switch. When not pressed, it maintains the closed circuit of the electromagnet 2121a. When pressed and reaching its disconnection stroke, it opens the circuit of the electromagnet 2121a, eliminating the magnetic force. Therefore, based on the pressure control of the contact switch mechanism 2121b, it is possible to achieve linkage unlocking while ensuring a reliable connection between the fixture connector 252a and the product fixture 22 during the lifting process. This effectively avoids affecting the structural accuracy of the fixture carrier plate 212 during lifting. Furthermore, it effectively prevents the influence of external forces on the positional accuracy of the product fixture during lifting, which is beneficial for ensuring the consistency of the product fixture 22's position before and after imprinting. In this embodiment, the fixture coarse positioning module 23 passes through the first channel to coarsely position the product fixture 22; the correction component 242 and the lifting component 252 respectively pass through the second channel and are connected to the product fixture 22.

[0117] like Figure 9As shown, according to one embodiment of the present invention, the product fixture 22 includes: a fixture body 221; wherein, at least one station for product installation is provided on the upper side of the fixture body 221; and an adsorption groove 221a for adsorbing the product is provided at the station; in this embodiment, a vacuum channel 221b is provided inside the fixture body 221, one end of the vacuum channel 221b is connected to the adsorption groove 221a, and the other end of the vacuum channel 221b forms a connection opening 221c on the circumferential side of the fixture body 221 for connecting a vacuum source connection assembly 213; thereby, the product can be placed on the adsorption groove 221a and vacuum adsorbed by the connected vacuum source to ensure accurate and reliable product positioning. In this embodiment, the adsorption groove 221a is an annular groove, wherein, since the adsorption groove 221a needs to adsorb the product, the area of ​​the adsorption groove 221a is smaller than the surface area of ​​the product. Of course, the adsorption groove 221a can also be transformed into other configurations, such as multiple holes arranged in an array, linear grooves, etc. The principle is the same, as long as it can reliably adsorb the product, which will not be elaborated here.

[0118] Furthermore, since the adsorption groove 221a is provided on the upper side of the fixture body 221, to facilitate the connection of the vacuum channel 221b, the vacuum channel 221b can be configured as a vertical channel portion and a horizontal channel portion, which can be interconnected to make it easier to arrange the position of the connection opening 221c. In this embodiment, to facilitate the connection with the vacuum source connection assembly 213, a quick connector can be provided on the connection opening 221c, and a flexible hose can be used to connect the two to avoid the pipeline affecting the installation position of the product fixture 22.

[0119] In this embodiment, the circumferential side of the fixture body 221 is provided with a plurality of coarse positioning grooves 221d for the fixture coarse positioning module 23, and the middle of the fixture body 221 is provided with a middle positioning hole 221e that is nested and connected to the fixture connector 252a; wherein, the coarse positioning grooves 221d are arranged corresponding to the first channel provided on the bottom surface of the fixture mounting groove 2121, and the middle positioning hole 221e is arranged corresponding to the second channel provided on the bottom surface of the fixture mounting groove 2121.

[0120] Combination Figure 10 , Figure 11 and Figure 12As shown, according to one embodiment of the present invention, the fixture body 221 is further provided with a linkage control mechanism 221f; wherein, the arrangement direction of the linkage control mechanism 221f is consistent with the radial direction of the intermediate positioning hole 221e; in this embodiment, the linkage control mechanism 221f is a linear compressible and telescopic mechanism, which includes: a linkage telescopic rod 221f1 and a linkage compression spring 221f2; wherein, the linkage telescopic rod 221f1 includes: a rod body portion 221f11, abutting portion 221f12 and actuating portion 221f13; in this embodiment, along the axial direction of the rod body portion 221f11, the abutting portion 221f12 is provided at one end of the rod body portion 221f11, and the actuating portion 221f13 is provided on the radially outer side near the other end of the rod body portion 221f11. In this embodiment, to facilitate the installation of the linkage control mechanism 221f, an installation channel 221g can be further provided on the fixture body 221. The installation channel forms openings on the inner side of the intermediate positioning hole 221e and the outer circumferential side of the fixture body 221. Thus, when the linkage control mechanism 221f is installed in the installation channel 221g, the abutting part 221f12 protrudes from the inner side of the intermediate positioning hole 221e, and the actuating part 221f13 protrudes from the lower side of the fixture body 221. In order to ensure the protrusion of the actuating part 221f13, a protruding channel 221h for the actuating part 221f13 to protrude and move is also provided on the lower side of the fixture body 221.

[0121] In this embodiment, the rod portion 221f11 includes a front portion 221f111 and a rear portion 221f112 coaxially arranged. The outer diameter of the front portion 221f111 is consistent with the radial dimension of the mounting channel 221g, while the outer diameter of the rear portion 221f112 is smaller than the outer diameter of the front portion 221f111. Therefore, to facilitate the installation of the linkage telescopic rod 221f1, a further linkage control mechanism 221f can be incorporated. A sliding sleeve 221f3 and a screw-on plug 221f4 are provided. The sliding sleeve 221f3 is a circular tube with one end open and the other end closed. Its inner diameter is consistent with the outer diameter of the rear part of the rod 221f112, and its outer diameter is consistent with the inner diameter of the installation channel 221g. Thus, the rear part of the rod 221f112 can be slidably installed in the sliding sleeve 221f3, and the linkage compression spring 221f2 is arranged inside the sliding sleeve 221f3.

[0122] In this embodiment, to facilitate the installation of the actuating part 221f13, a actuating part mounting cavity 221f112a is provided radially through the rear part 221f112 of the rod body. The actuating part 221f13 can be rigidly connected to the actuating part mounting cavity 221f112a, for example, by welding or threaded connection, preferably by threaded connection. This allows for easy adjustment of the extension length of the actuating part 221f13 to control the degree of pressure applied to the contact switch mechanism 2121b. Alternatively, the actuating part 221f13 can be slidably installed in the actuating part mounting cavity 221f112a. Furthermore, a compression spring and corresponding plug screw can be provided in the actuating part mounting cavity 221f112a to elastically install the actuating part 221f13 within it.

[0123] In this embodiment, to improve the overall integrity of the linkage control mechanism 221f and its ease of assembly and disassembly, an elongated hole 221f31 for sliding of the actuating part 221f13 is machined on the sliding sleeve 221f3, and the length of the elongated hole 221f31 is at least the same as the length of the protruding channel 221h. Thus, based on the installed actuating part 221f13, the linkage telescopic rod 221f1 can be snapped into the sliding sleeve 221f3, realizing the overall structural design, and also facilitating its assembly and disassembly from the fixture body 221.

[0124] In this embodiment, the screw-in plug 221f4 serves to seal the linkage control mechanism 221f within the mounting channel 221g. To achieve this, the outer surface of the screw-in plug 221f4 and the inner end of the mounting channel 221g are provided with interlocking threads for installation. Furthermore, by controlling the screw-in length of the screw-in plug 221f4, the elastic force of the linkage compression spring 221f2 can be controlled, thereby controlling the smoothness of the extension and retraction process and ensuring the ease of connection between the product fixture 22 and the fixture connector 252a.

[0125] In this embodiment, when the fixture connector 252a is nested with the intermediate positioning hole 221e, the abutting part 221f12 retracts, and the toggle part 221f13 presses against the contact switch mechanism 2121b; wherein, in order to facilitate the embedding of the second cylindrical boss 252a13 on the fixture connector 252a into the intermediate positioning hole 221e, a cut surface 252a14 can be provided on the side of the second cylindrical boss 252a13 opposite to the abutting part 221f12. In this embodiment, the cut surface 252a14 has a beveled portion, and the beveled portion is located at the lower end of the cut surface 252a14. Thus, during the upward movement of the fixture connector 252a, the upper part of the cut surface 252a14 can fully avoid the abutment portion 221f12. After the fixture connector 252a rises a certain distance, the upper part of the second cylindrical boss 252a13 has sufficient mating length with the intermediate positioning hole 221e, thereby ensuring the mating accuracy between the second cylindrical boss 252a13 and the product fixture 22, which is more beneficial to ensuring the position of the product fixture 22. Furthermore, as the second cylindrical boss 252a13 rises, the oblique cut portion at the lower end of the cut surface 252a14 begins to contact the abutment portion 221f12 to push the linkage telescopic rod 221f1 back until the cylindrical surface of the second cylindrical boss 252a13 completely presses the end of the abutment portion 221f12 into the inner surface of the intermediate positioning hole 221e. In this state, the actuating portion 221f13 moves with the linkage telescopic rod 221f1 to reach its maximum stroke and press against the upper end of the contact switch mechanism 2121b, thereby cutting off the connection circuit of the electromagnet 2121a. Then, under the action of the bottom surface of the product fixture 21 abutting against the first cylindrical boss 252a12, it can be simultaneously separated from the bearing unit 21, so as to effectively ensure the uniformity and reliability of the positional accuracy of the product fixture 21 when switching to contact with the lifting component 252.

[0126] Combination Figure 13 and Figure 14 As shown, according to one embodiment of the present invention, the contact switch mechanism 2121b includes: a switch movable part 2121b1 and a switch housing; in this embodiment, the switch movable part 2121b1 includes: a movable part body 2121b11, a spring piece 2121b12 connected to the movable part body 2121b11, and a movable part support spring 2121b13 connected to the lower end of the movable part body 2121b11; wherein, the movable part body 2121b11 is configured as an insulating rod, and the spring piece 2121b12 is configured as a long strip-shaped elastic plate, the spring piece 2121b12 is fixedly inserted into the movable part body 2121b11 in a direction perpendicular to the movable part body 2121b11, and contacts are provided on the upper sides of opposite ends of the spring piece 2121b12. In this embodiment, the spring piece 2121b12 has a conductive structure.

[0127] In this embodiment, the lower end of the movable part body 2121b11 is coaxially sleeved with the movable part support spring 2121b13, while the upper end of the movable part body 2121b11 is provided with a contact part that abuts against the actuating part 221f13. In this embodiment, the contact part can be configured as a trapezoidal boss or a conical boss to facilitate contact and guidance with the actuating part 221f13, thereby reducing rigid contact between them and suppressing the impact of contact between structures. This is more beneficial for ensuring the accurate and reliable positioning of the product fixture 22.

[0128] In this embodiment, the switch housing encloses the movable part 2121b1 of the switch. The switch housing consists of an insulating shell and terminals disposed within the insulating shell. In this embodiment, two terminals are spaced apart and connected to the contacts at both ends of the spring 2121b12, respectively. The lower end of the movable part support spring 2121b13 abuts against the bottom of the insulating shell. Thus, in the initial state, the normally closed contact switching mechanism 2121b is based on the movable part support spring. 2121b13 presses the two contacts of the spring 2121b12 against the two terminals. Because the spring 2121b12 itself has a certain elasticity, it can bend under the support of the movable part support spring 2121b13. At this point, a longer stroke is required to disconnect the contact switch mechanism 2121b. After the movable part body 2121b11 is pressed, causing the spring 2121b12 to disconnect from the terminals, the spring 2121b1... 2. It can be elastically restored to its original state, which shortens the travel distance for reconnecting the circuit. Based on this, the contact switch mechanism 2121b allows the second cylindrical boss 252a13 to have a longer travel distance during insertion into the intermediate positioning hole 221e, so that the fixture connector 252a and the product fixture 22 can fully abut against each other within the effective time of the electromagnet 2121a. When the electromagnet 2121a fails, the product fixture 22 can be lifted in time. As the lifting distance increases, the spring 2121b12 and the terminal can be reconnected in less time than the disconnection time. At this time, the product fixture 22 and the bearing unit 21 have a certain distance between them, but the magnetic force generated by the reconnected electromagnet 2121a can still partially act on the product fixture 22, so that the contact between the product fixture 22 and the fixture connector 252a is tighter, eliminating the gap that may exist during the lifting process, so as to more effectively ensure the connection and positioning accuracy between the product fixture 22 and the fixture connector 252a.

[0129] like Figure 10As shown, according to one embodiment of the present invention, in order to further improve the connection reliability between the second cylindrical boss 252a13 and the intermediate positioning hole 221e, a boss adsorption groove 221e1 can be further provided on the inner side of the intermediate positioning hole 221e, and a first transition connection channel 221e2 connecting the vacuum channel 221b and the installation channel 221g can be provided on the fixture body 221. Then, a first sealing ring 221f121 is provided on the abutting part 221f12, and a second sealing ring 221f112b is sleeved on the rear part 221f112 of the rod.

[0130] In this embodiment, in its initial state, the linkage telescopic rod 221f1, based on the elasticity of the linkage compression spring 221f2, can press the first sealing ring 221f121 against the limiting step of the installation channel 221g with the front part 221f111 of the rod body. The outer side of the front part 221f111 of the rod body then blocks the opening formed by the first transition connection channel 221e2 in the installation channel 221g. At this time, the overall length of the front part 221f111 of the rod body can be set to block the opening formed by the first transition connection channel 221e2. Then, when the linkage telescopic rod 221f1 retracts, the front part 221f111 of the rod body and the opening formed by the first transition connection channel 221e2 are misaligned to achieve the connection control between the vacuum channels.

[0131] In this embodiment, the boss adsorption groove 221e1 can be directly connected to the opening of the mounting channel 221g. Therefore, when the abutment portion 221f12 is pressed into the mounting channel 221g, the boss adsorption groove 221e1 can be connected to the vacuum channel to achieve adsorption on the outer surface of the second cylindrical boss 252a13, further improving the reliability and stability of the connection. This ensures that the product fixture 22 remains fully fixed during the product imprinting process, effectively avoiding the influence of the total external force on the position of the product fixture 22 during the imprinting process, which is more beneficial for ensuring the accuracy of the product fixture 22 before and after imprinting. In this embodiment, to ensure the boss adsorption groove 221e1 fully adsorbs the second cylindrical boss 252a13, it is necessary to ensure that the cylindrical surface of the second cylindrical boss 252a13 completely seals the boss adsorption groove 221e1. In this embodiment, in order to achieve full communication between the boss adsorption groove 221e1 and the vacuum channel, a groove can be further processed on the outer side of the abutment portion 221f12 to increase the conduction area and make its adsorption performance better.

[0132] See Figure 15In another embodiment, the boss adsorption groove 221e1 can be located below the linkage control mechanism 221f, and the boss adsorption groove 221e1 is connected to the installation channel 221g through the second transition connection channel 221e3. Similarly, the front part of the rod 221f111 still controls the sealing and opening of the opening formed by the second transition connection channel 221e3 on the installation channel 221g. In this embodiment, along the direction from the abutment portion 221f12 to the front portion 221f111 of the rod, the opening formed by the first transition connection channel 221e2 on the mounting channel 221g and the opening formed by the second transition connection channel 221e3 on the mounting channel 221g are misaligned. Furthermore, the opening formed by the second transition connection channel 221e3 is positioned further forward. Thus, during the process of the abutment portion 221f12 being pressed back, the front portion 221f111 of the rod first opens the opening formed by the second transition connection channel 221e3. Finally, until the abutment portion 221f12 is fully pressed in, the opening formed by the first transition connection channel 221e2 opens, achieving communication with the vacuum passage and generating an adsorption effect. In this embodiment, by moving the boss adsorption groove 221e1 downward, the boss adsorption groove 221e1 can be preferentially closed by the cylindrical side of the second cylindrical boss 252a13. Furthermore, by setting the opening in a staggered manner, the connection process of the vacuum channel is made to have a timing difference. Thus, the connection process of the vacuum channel can be synchronized with the de-energization process of the electromagnet 2121a. In addition, the closing process of the boss adsorption groove 221e1 can be given priority, which is more beneficial to ensuring the stability of the pressure of the entire vacuum channel and can fully avoid the impact on the adsorption performance of the product.

[0133] In another embodiment, when the boss adsorption groove 221e1 is located below the linkage control mechanism 221f, the position of the intermediate positioning hole 221e for the boss adsorption groove 221e1 is a conical annular surface. Thus, the corresponding position of the second cylindrical boss 252a13 is matched with a conical annular surface. Under this structural design, the sealing performance of the boss adsorption groove 221e1 can be more easily improved through the conical annular surface, which is more beneficial for eliminating gaps between them to ensure the stability of adsorption.

[0134] With the above settings, by further setting a boss adsorption groove 221e1 on the intermediate positioning hole 221e, the product fixture 22 can still have sufficient fixing means in the lifting state, realizing the consistency of the product fixture position before and after lifting, thereby effectively ensuring the product imprinting yield of this solution.

[0135] Through the above settings, this solution, by selecting a boss adsorption groove 221e1 on the intermediate positioning hole 221e, ensures the positioning accuracy and reliability between the product fixture 22 and the second cylindrical boss 252a13. On the other hand, it also facilitates the disengagement of the second cylindrical boss 252a13 during the descent process. Since the second cylindrical boss 252a13 moves axially during the disengagement process, the radial adsorption force has minimal impact on the axial movement. This makes it easier to maintain the stability of the product fixture 22's position during the disengagement of the second cylindrical boss 252a13 until the electromagnet 2121a generates adsorption force again, thereby achieving a consistent and unified position of the product fixture 22 before and after lifting.

[0136] like Figure 16 As shown, according to one embodiment of the present invention, the jig coarse positioning module 23 includes: a third driver 231, a third transmission 232, and a gripper mechanism 233; wherein, the third driver 231 drives the gripper mechanism 233 to move vertically based on the third transmission 232, and when it rises to the highest position, the gripper mechanism 233 can be activated to perform coarse positioning of the product jig. In this embodiment, the third driver 231, the third transmission 232, and the gripper mechanism 233 are connected sequentially from bottom to top; the gripper mechanism 233 includes: a gripper base 233a, a gripper assembly 233b slidably connected to the gripper base 233a, and a gripper drive 233c connected to the gripper assembly 233b; multiple gripper assemblies 233b are provided. In this embodiment, the gripper assembly 233b includes two symmetrical grippers 233b1 that are movable relative to each other. Each gripper 233b1 includes a horizontal connecting arm 233b11, with a fixture positioning rod 233b12 and a sliding connector 233b13 connected to opposite ends of the horizontal connecting arm 233b11. In this embodiment, the fixture positioning rod 233b12 is vertically mounted on the upper side of the horizontal connecting arm 233b11, and the sliding connector 233b13 is connected to the lower side of the horizontal connecting arm 233b11. The sliding connector 233b13 is slidably connected to the gripper base 233a. The gripper drive 233c is connected to the sliding connector 233b13. The sliding direction of the sliding connector 233b13 relative to the gripper base 233a is consistent with the length direction of the horizontal connecting arm 233b11. In this embodiment, the gripper drive 233c can be a cylinder or an electric drive (such as a rack and pinion structure).

[0137] like Figure 17As shown, according to one embodiment of the present invention, the correction component 242 includes: a first X-axis translation structure 2421, a first Y-axis translation structure 2422, a first Z-axis translation structure 2423, an angle adjustment structure 2424, and an adsorption structure 2425; wherein, along the vertical direction, the first X-axis translation structure 2421, the first Y-axis translation structure 2422, and the first Z-axis translation structure 2423 are arranged sequentially; the first Z-axis translation structure 2423 is the supporting unit of the entire unit, so as to realize the position adjustment of the first X-axis translation structure 2421, the first Y-axis translation structure 2422, the angle adjustment structure 2424, and the adsorption structure 2425 in the Z-axis direction (i.e., the vertical direction). Further, the angle adjustment structure 2424 is mounted on the first X-axis translation structure 2421; the adsorption structure 2425 is supported on the angle adjustment structure 2424; wherein, the adsorption structure 2425 is used to adsorb and fix the product or the product fixture 22 supporting the product. Therefore, based on the adsorption effect of the adsorption structure 2425, three-dimensional driving can be achieved under the action of the first X-axis translation structure 2421, the first Y-axis translation structure 2422, and the first Z-axis translation structure 2423 to achieve the corresponding displacement adjustment. Specifically, the first Z-axis translation structure 2423 lifts the product or product fixture 22, thereby adjusting the position of the product or product fixture 22 in the horizontal direction under the action of the first X-axis translation structure 2421 and the first Y-axis translation structure 2422. Furthermore, the axial direction of the angle adjustment structure 2424 is aligned with the Z-axis direction, and the angle adjustment structure 2424 is used to drive the adsorption structure 2425 to swing within a preset angle range. Thus, under the driving action of the angle adjustment structure 2424, the rotation angle of the product or product fixture 22 can be adjusted to achieve accurate adjustment of the position and angle of the product or product fixture 22.

[0138] Combination Figure 17 and Figure 18 As shown, according to one embodiment of the present invention, the angle adjustment structure 2424 includes: an adjustment drive motor 2424a, and a transmission mechanism 2424b connected to the rotating shaft of the adjustment drive motor 2424a; wherein the adjustment drive motor 2424a and the transmission mechanism 2424b are respectively connected to the upper and lower sides of the first X-axis translation structure 2421; the transmission mechanism 2424b is provided with a rotation input end 2424b1 and a rotation output end 2424b2; furthermore, the output shaft of the adjustment drive motor 2424a is connected to the rotation input end 2424b1.

[0139] Combination Figure 17 and Figure 18As shown, according to one embodiment of the present invention, the transmission mechanism 2424b is provided with a swing limiting member 2424b3 and a limit sensor 2424b4; wherein, the swing limiting member 2424b3 is coaxially arranged with the rotation output end 2424b2 of the transmission mechanism 2424b. In this embodiment, the swing limiting member 2424b3 has at least one extension portion 2424b31, and a swing indicator 2424b32 is provided at the end of the extension portion 2424b31; furthermore, two limit sensors 2424b4 are arranged at intervals to limit the preset angle range of the angle adjustment structure 2424 based on the swing indicator 2424b32 and the limit sensors 2424b4. In this embodiment, the two limit sensors 2424b4 are arranged around the transmission mechanism 2424b, thereby enabling the detection of the angle deflection limit by moving the swing indicator 2424b32 to the position of the limit sensor 2424b4. In this embodiment, to ensure the structural symmetry of the swing limiter 2424b3, extension portions 2424b31 can be symmetrically arranged on opposite sides of the swing limiter 2424b3, so that a swing indicator 2424b32 can be set on any one of the extension portions 2424b31. This not only effectively ensures the convenience of its installation, but also makes its mass distribution symmetrical, which is beneficial to ensuring the balance of the rotation adjustment angle process. In this embodiment, the limit sensor 2424b4 can be a photoelectric sensor or a contact switch, etc. Correspondingly, the swing indicator 2424b32 can be set as a sheet metal structural component, which includes: a first connecting plate and a first pointer connected to the first connecting plate; wherein, the first pointer and the first connecting plate are perpendicular to each other to form an L-shaped structure, so that the first connecting plate can be directly connected to the upper side of the end of the extension 2424b31 by a threaded connector, and the first pointer is arranged downward, so that when the first pointer is in the position of the limit sensor 2424b4, it can block or abut against the limit sensor 2424b4, thereby causing it to output a corresponding detection signal.

[0140] Combination Figure 17 and Figure 18As shown, according to one embodiment of the present invention, the adsorption structure 2425 includes: a positioning base 2425a, a hollow adsorption structure 2425b coaxially disposed with the positioning base 2425a, and a flexible hose quick connector 2425c disposed on the side of the positioning base 2425a; wherein, the positioning base 2425a is provided with a hollow connecting channel for connecting the flexible hose quick connector 2425c and the hollow adsorption structure 2425b; in this embodiment, the positioning base 2425a is detachably connected to the rotation output end 2424b2 and / or the swing limiting member 2424b3. In this embodiment, the hollow adsorption structure 2425b can be configured as a hollow cylindrical structure, thereby achieving communication with the connecting channel on the positioning base 2425a through the hollow portion. Furthermore, the end of the hollow adsorption structure 2425b that is away from the positioning element seat 2425a can be set as a radially enlarged structure to ensure the contact area at its adsorption contact position, which is more beneficial to improving the stability and reliability of adsorption.

[0141] Furthermore, the hollow adsorption structure 2425b is detachably connected to the positioning element seat 2425a. This allows for easy replacement of hollow adsorption structures 2425b of different lengths and thicknesses to adapt to different products or product fixtures 22, improving the flexibility of the structure. Of course, the radially enlarged end of the hollow adsorption structure 2425b can also be made detachable, allowing for the installation of end structures of different sizes, further expanding the structural flexibility.

[0142] Combination Figure 17 and Figure 18 As shown, according to one embodiment of the present invention, the first X-axis translation structure 2421 includes: a first X-axis platform 2421a, a first X-axis guide rail 2421b disposed on the lower side of the first X-axis platform 2421a, a first X-axis drive 2421c for driving the first X-axis platform 2421a to reciprocate along the X-axis direction, and a first X-axis limit sensor 2421d for limiting the movement range of the first X-axis platform 2421a; wherein the first X-axis drive 2421c is disposed side by side with the first X-axis platform 2421a. In this embodiment, a first X-axis movement indicator is disposed on the side of the first X-axis platform 2421a away from the first X-axis drive 2421c; furthermore, two first X-axis limit sensors 2421d are disposed at intervals to limit the movable range of the first X-axis platform 2421a based on the first X-axis movement indicator and the first X-axis limit sensors 2421d.

[0143] By setting the first X-axis drive 2421c and the first X-axis platform 2421a side by side, this solution effectively compresses the vertical height of the first X-axis translation structure 2421. This results in the first X-axis translation structure 2421 occupying less space in the vertical direction, which is more beneficial for reducing the overall height of the correction component 242. This allows it to be installed more conveniently under the product carrier platform, ensuring its ease of use.

[0144] In this embodiment, the first X-axis limit sensor 2421d can be a photoelectric sensor or a contact switch, etc. Correspondingly, the first X-axis movement indicator can be set as a sheet metal structural component, which includes: a second connecting plate and a second pointer connected to the second connecting plate; wherein, the second pointer and the second connecting plate are perpendicular to each other to form an L-shaped structure, so that the second connecting plate can be directly connected to the upper side of the first X-axis platform 2421a by a threaded connector, and the second pointer is arranged downward, so that when the second pointer is at the position of the first X-axis limit sensor 2421d, it can block or abut against the first X-axis limit sensor 2421d, thereby causing it to output a corresponding detection signal.

[0145] Combination Figure 17 and Figure 18 As shown, according to one embodiment of the present invention, the first Y-axis translation structure 2422 includes: a first Y-axis platform 2422A, a first Y-axis guide rail 2422B disposed on the lower side of the first Y-axis platform 2422A, a first Y-axis drive 2422C for driving the first Y-axis platform 2422A to reciprocate along the Y-axis direction, and a first Y-axis limit sensor 2422D for limiting the movement range of the first Y-axis platform 2422A; in this embodiment, the first Y-axis drive 2422C is disposed below the first Y-axis platform 2422A; a first Y-axis movement indicator is disposed on the side of the first Y-axis platform 2422A near the first Y-axis drive 2422C; furthermore, two first Y-axis limit sensors 2422D are disposed at intervals to limit the movable range of the first Y-axis platform 2422A based on the first Y-axis movement indicator and the first Y-axis limit sensors 2422D. In this embodiment, the first Y-axis drive 2422C is located below the first mounting support 2423a on the side of the first Y-axis platform 2422A away from the first Z-axis translation structure 2423, so as to avoid structural interference during operation.

[0146] By setting the first Y-axis drive 2422C below the first Y-axis platform 2422A, this solution can effectively utilize the empty space below, thus effectively suppressing the horizontal dimension of the solution. This is more beneficial for reducing the overall size of the solution, making the structure of the solution compact and easier to arrange in a small space, and making the installation of the solution more convenient.

[0147] In this embodiment, the first X-axis guide rail 2421b and the first X-axis drive 2421c are connected to the upper side of the first Y-axis platform 2422A; the first X-axis limit sensor 2421d is disposed on the circumferential side of the first Y-axis platform 2422A; wherein, the positions of the first X-axis limit sensor 2421d and the first X-axis movement indicator are matched and disposed, which will not be described in detail here. In this embodiment, the first Y-axis limit sensor 2422D can be a photoelectric sensor or a contact switch, etc. Correspondingly, the first Y-axis movement indicator can be set as a sheet metal structural component, which includes: a third connecting plate and a third pointer connected to the third connecting plate; wherein, the third pointer and the third connecting plate are perpendicular to each other to form an L-shaped structure, so that the third connecting plate can be directly connected to the upper side of the first Y-axis platform 2422A by a threaded connector, and the third pointer is arranged downward, so that when the third pointer is in the position of the first Y-axis limit sensor 2422D, it can block or abut against the first Y-axis limit sensor 2422D, thereby causing it to output a corresponding detection signal.

[0148] Combination Figure 17 and Figure 18 As shown, according to one embodiment of the present invention, the first Z-axis translation structure 2423 includes: a first mounting support 2423a, a first Z-axis assembly 2423b slidably connected to the first mounting support 2423a, a first Z-axis drive 2423c for driving the first Z-axis assembly 2423b to reciprocate along the Z-axis direction, and a first Z-axis limit sensor 2423d for limiting the movement range of the first Z-axis assembly 2423b. In this embodiment, the first Z-axis assembly 2423b includes: a first Z-axis platform 2423b1, a first Z-axis guide rail 2423b2, and a first Z-axis movement indicator 2423b3.

[0149] Combination Figure 1 and Figure 19As shown, according to one embodiment of the present invention, the inking module 26 includes: a pad printing plate assembly 261 and an assembly adjustment support 262 for adjusting the position of the pad printing plate assembly 261; wherein, the assembly adjustment support 262 includes: a second X-axis translation structure 2621 and a second Y-axis translation structure 2622; the second X-axis translation structure 2621 is supported on the second Y-axis translation structure 2622, and the pad printing plate assembly 261 is supported on the second X-axis translation structure 2621. With the above configuration, the pad printing plate assembly 261 can be flexibly adjusted via the assembly adjustment support 262 to adapt to different ink head lifting mechanisms 251a, thereby ensuring the accuracy of the pad printing pattern.

[0150] like Figure 1 As shown, according to one embodiment of the present invention, the pad printing apparatus 2 further includes a product inspection unit 28 and a glue head inspection unit 29; wherein, along the running direction of the carrying unit 21, the product inspection unit 28 is disposed downstream of the imprinting module 25 at a distance; in this embodiment, the product inspection unit 28 is a visual inspection device, which acquires an image of the product after pad printing to inspect its surface quality, thereby ensuring the product yield. In this embodiment, the glue head inspection unit 29 is arranged adjacent to the imprinting module 25; specifically, the glue head inspection unit 29 is located on the switching path of the glue head lifting mechanism 251a, thereby obtaining the surface quality of the glue head 251aa by acquiring an image of the glue head 251aa on the glue head lifting mechanism 251aa, thereby realizing the early detection of defects in the glue head 251aa, which is more beneficial to ensuring the product yield of this solution.

[0151] like Figure 1 As shown, according to one embodiment of the present invention, multiple pad printing devices 2 can be configured on the machine base 1; in this embodiment, two pad printing devices 2 are symmetrically arranged, thereby enabling the present solution to achieve pad printing processing of products more efficiently.

[0152] like Figure 1 As shown, according to one embodiment of the present invention, the pad printing machine of the present invention further includes a control unit, which is connected to the first position recognition module 3, the carrier unit 21, the fixture coarse positioning module 23, the fixture correction module 24, the printing module 25, the inking module 26, and the pad cleaning module 27, respectively. In this embodiment, the control unit can be implemented using mature architectures such as PLC, microcontroller, and FPGA, which will not be described in detail here.

[0153] The above description is merely an example of a specific solution of the present invention. For any devices and structures not described in detail herein, it should be understood that they are implemented using common devices and methods already available in the art.

[0154] The above description is merely one embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pad printing machine, characterized in that, include: Machine base (1), pad printing device (2) installed on the machine base (1), and first position recognition module (3) installed on the edge of the machine base (1); The pad printing device (2) includes: a carrier unit (21), a product fixture (22) detachably connected to the carrier unit (21), a fixture coarse positioning module (23), a fixture correction module (24) and an imprinting module (25) arranged sequentially along the running direction of the carrier unit (21), and an ink application module (26) and a pad cleaning module (27) adjacent to the imprinting module (25). The fixture calibration module (24) includes: a first position recognition component (241) and a calibration component (242) disposed below the first position recognition component (241). The imprinting module (25) includes: a glue head assembly (251) and a lifting assembly (252) disposed below the glue head assembly (251); The jig coarse positioning module (23), the correction component (242), and the lifting component (252) are located below the bearing unit (21); The fixture coarse positioning module (23) is used to coarsely position the product fixture (22); The first position recognition component (241) is used to collect the position and pose deviation of the product fixture (22) or the product on the product fixture (22), and the correction component (242) performs position and pose correction based on the position and pose deviation; The lifting assembly (252) is used to lift the product fixture (22), and the rubber head assembly (251) presses the product on the product fixture (22); The rubber head assembly (251) is provided with at least one rubber head lifting mechanism (251a); The printing head lifting mechanism (251a) is provided with a printing head (251aa). The lifting assembly (252) is provided with a fixture connector (252a) for connecting to the product fixture (22) and a pressure sensor (252b) for sensing the product pressure on the product fixture (22). The fixture connector (252a) includes a fixture connecting part (252a1) and a mounting base connecting part (252a2) arranged sequentially from top to bottom. The fixture connection portion (252a1) includes: a first connecting disc (252a11); The mounting base connection portion (252a2) includes: a second connecting disc (252a21); A pressure sensor (252b) is installed between the first connecting disk (252a11) and the second connecting disk (252a21). The pressure sensor (252b) is arranged at a distance from the edge of the first connecting disk (252a11) and the second connecting disk (252a21), and multiple pressure sensors (252b) are arranged at equal intervals along the circumference of the first connecting disk (252a11) and the second connecting disk (252a21).

2. The pad printing machine according to claim 1, characterized in that, The lifting assembly (252) lifts the product fixture (22) based on the fixture connector (252a) to disengage the product fixture (22) from the support unit (21); The rubber head lifting mechanism (251a) presses the product on the product fixture (22) based on the rubber head (251aa), and controls the pressure of the rubber head (251aa) based on the pressure feedback from the pressure sensor (252b).

3. The pad printing machine according to claim 2, characterized in that, The rubber head assembly (251) further includes: a first rotational support (251b); The first rotating support (251b) is connected to a plurality of the rubber head lifting mechanisms (251a), and the plurality of rubber head lifting mechanisms (251a) are arranged at equal intervals on the first rotating support (251b); The rubber head lifting mechanism (251a) includes: a first driver (251a1), a first transmission device (251a2), a first two-dimensional adjustment platform (251a3), and a rubber head mounting base (251a4). The first driver (251a1), the first transmission device (251a2), the first two-dimensional adjustment platform (251a3), and the rubber head mounting base (251a4) are installed sequentially from top to bottom; The first driver (251a1) drives the first two-dimensional adjustment platform (251a3) and the rubber head mounting base (251a4) to move in the vertical direction via the first transmission (251a2).

4. The pad printing machine according to claim 3, characterized in that, The lifting assembly (252) further includes: a second driver (252c), a second transmission (252d), and a connector mounting base (252e); The second driver (252c), the second transmission (252d), and the connector mounting base (252e) are connected sequentially from bottom to top; The second driver (252c) drives the connector mounting base (252e) to move vertically via the second transmission (252d); The fixture connector (252a) is detachably connected to the connector mounting base (252e).

5. The pad printing machine according to claim 4, characterized in that, The support unit (21) includes: a second rotating support (211), a fixture support plate (212) connected to the rotating shaft of the second rotating support (211), and a vacuum source connection assembly (213) mounted on the fixture support plate (212). The fixture carrier plate (212) is provided with a plurality of fixture mounting slots (2121) for mounting the product fixture (22). The bottom surface of the fixture mounting groove (2121) is embedded with a plurality of electromagnets (2121a) for adsorbing the product fixture (22) and a contact switch mechanism (2121b) for controlling the on and off of the electromagnets (2121a). A first channel and a second channel are provided on the bottom surface of the fixture mounting groove (2121). The fixture coarse positioning module (23) passes through the first channel to perform coarse positioning on the product fixture (22); The correction component (242) and the lifting component (252) respectively pass through the second channel and are connected to the product fixture (22).

6. The pad printing machine according to claim 5, characterized in that, The product fixture (22) includes: a fixture body (221); The upper side of the fixture body (221) is provided with at least one workstation for product installation; An adsorption groove (221a) for adsorbing products is provided at the work station. A vacuum channel (221b) is provided inside the fixture body (221). One end of the vacuum channel (221b) is connected to the adsorption groove (221a), and the other end of the vacuum channel (221b) forms a connection opening (221c) on the circumferential side of the fixture body (221) for connecting the vacuum source connection assembly (213). The jig body (221) has a plurality of coarse positioning grooves (221d) for the jig coarse positioning module (23) on its circumferential side, and the jig body (221) has an intermediate positioning hole (221e) in the middle that is nested and connected to the jig connector (252a). The coarse positioning groove (221d) is arranged corresponding to the first channel provided on the bottom surface of the fixture mounting groove (2121), and the intermediate positioning hole (221e) is arranged corresponding to the second channel provided on the bottom surface of the fixture mounting groove (2121).

7. The pad printing machine according to claim 6, characterized in that, The fixture body (221) is also provided with a linkage control mechanism (221f); The arrangement direction of the linkage control mechanism (221f) is consistent with the radial direction of the intermediate positioning hole (221e); The linkage control mechanism (221f) includes: a linkage telescopic rod (221f1) and a linkage compression spring (221f2). The linkage telescopic rod (221f1) includes: a rod body part (221f11), abutting part (221f12), and actuating part (221f13). Along the axial direction of the rod portion (221f11), the abutting portion (221f12) is provided at one end of the rod portion (221f11), and the actuating portion (221f13) is provided on the radially outer side near the other end of the rod portion (221f11). The abutting part (221f12) protrudes from the inner side of the intermediate positioning hole (221e), and the actuating part (221f13) protrudes from the lower side of the fixture body (221); When the fixture connector (252a) is nested with the intermediate positioning hole (221e), the abutting part (221f12) retracts, and the toggle part (221f13) presses against the contact switch mechanism (2121b).

8. The pad printing machine according to claim 7, characterized in that, The jig coarse positioning module (23) includes: a third driver (231), a third transmission device (232), and a gripper mechanism (233). The third driver (231), the third transmission device (232), and the gripper mechanism (233) are connected sequentially from bottom to top; The gripper mechanism (233) includes: a gripper base (233a), a gripper assembly (233b) slidably connected to the gripper base (233a), and a gripper drive (233c) connected to the gripper assembly (233b). The gripper assembly (233b) is provided in multiple forms; The gripper assembly (233b) includes two symmetrical grippers (233b1) that are movable relative to each other. The gripper (233b1) includes: a horizontal connecting arm (233b11), and a fixture positioning rod (233b12) and a sliding connector (233b13) respectively connected to opposite ends of the horizontal connecting arm (233b11). The fixture positioning rod (233b12) is vertically installed on the upper side of the horizontal connecting arm (233b11), and the sliding connector (233b13) is connected to the lower side of the horizontal connecting arm (233b11). The sliding connector (233b13) is slidably connected to the gripper base (233a); The gripper drive (233c) is connected to the sliding connector (233b13); The sliding direction of the sliding connector (233b13) relative to the gripper base (233a) is consistent with the length direction of the horizontal connecting arm (233b11).

9. The pad printing machine according to claim 8, characterized in that, The correction component (242) includes: a first X-axis translation structure (2421), a first Y-axis translation structure (2422), a first Z-axis translation structure (2423), an angle adjustment structure (2424), and an adsorption structure (2425). Along the vertical direction, the first X-axis translation structure (2421), the first Y-axis translation structure (2422), and the first Z-axis translation structure (2423) are arranged sequentially; The angle adjustment structure (2424) is mounted on the first X-axis translation structure (2421); The adsorption structure (2425) is supported on the angle adjustment structure (2424); The adsorption structure (2425) is used to adsorb and fix the product fixture (22) or the product on the product fixture (22); The axial direction of the angle adjustment structure (2424) is consistent with the moving direction of the first Z-axis translation structure (2423), and the angle adjustment structure (2424) is used to drive the adsorption structure (2425) to swing within a preset angle range.

10. The pad printing machine according to claim 9, characterized in that, The inking module (26) includes: a pad printing plate assembly (261) and a component adjustment support (262) for adjusting the position of the pad printing plate assembly (261). The component adjustment support (262) includes: a second X-axis translation structure (2621) and a second Y-axis translation structure (2622); The second X-axis translation structure (2621) is supported on the second Y-axis translation structure (2622), and the pad printing plate assembly (261) is supported on the second X-axis translation structure (2621); The pad printing device (2) further includes: a product detection unit (28) and a glue head detection unit (29); Along the running direction of the bearing unit (21), the product inspection unit (28) is disposed downstream of the imprinting module (25) with a gap from the imprinting module (25); The glue head detection unit (29) is arranged adjacent to the imprinting module (25); Multiple pad printing devices (2) are configured on the machine base (1).

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