Pad printing machine

Abstract

The pad printing machine provided by the utility model comprises a rotary feeding and discharging mechanism, and the rotary feeding and discharging mechanism comprises a feeding and discharging assembly and a rotary disc; the rotary table comprises at least three workbenches, and a feeding station, a discharging station and a transfer printing station are formed above the workbenches. The rotary transfer printing mechanism comprises at least two transfer printing heads, and the transfer printing heads are higher than the workbench; the rotating circumference of the pad printing head and the rotating circumference of the workbench are partially overlapped, and an ink taking station and a pad printing station are formed below the pad printing head. The transfer printing station is located at the overlapping position of the rotating circumference of the workbench and the transfer printing head. Therefore, on the one hand, the size of the whole machine is moderate while the efficient automatic treatment requirement is met.

Description

Technical Field

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

[0002] Pad printing is a type of printing method that can print text, graphics and images on the surface of irregular objects. Pad printing machines are usually equipped with a pad printing head made of silicone rubber material. Pad printing can be completed by applying ink with a pre-set pad printing pattern and pressing up and down on the corresponding position of the material to be pad printed. In order to ensure the pad printing effect, the pad printing machine will position the material before pad printing. The material will be in a preset position before pad printing, which is convenient for the pad printing head to print on it. In addition, in order to achieve assembly line-style automated processing, pad printing machines are generally also equipped with a mechanical structure for loading and unloading materials, thereby reducing labor costs.

[0003] In the prior art, pad printers are provided with corresponding structures that meet the above requirements. However, they still have defects. For example, pad printers are often in single-threaded working mode, and need to work in the order of loading, positioning the material, staining the pad head with ink, and pressing the material with the pad head. This single-threaded working mode will reduce work efficiency because some steps of the pad printer can be performed simultaneously. For example, while loading and positioning the material, the pad head can be destained with ink. In addition, in order to realize automated processing, the pad printer integrates multiple structures such as the above, which makes the entire pad printer too large.

[0004] Therefore, there are still problems to be solved in the prior art. Utility Model Content

[0005] The main purpose of the utility model is to provide a pad printing machine, which aims to meet the needs of efficient automated processing while the size of the whole machine is moderate.

[0006] To achieve the above-mentioned purpose, the pad printing machine proposed in the utility model includes: a rotating loading and unloading mechanism, which includes a loading and unloading assembly and a turntable; the turntable includes at least three workbenches, and a loading station, an unloading station and a pad printing station are formed above the workbenches; the rotating pad printing mechanism includes at least two pad printing heads, and the pad printing heads are higher than the workbenches; the rotating circumference of the pad printing head partially overlaps with the rotating circumference of the workbenches, and an ink collection station and a pad printing station are formed below the pad printing head; the pad printing station is located at the overlapping part of the rotating circumference of the workbenches and the pad printing head.

[0007] Preferably, the rotary loading and unloading mechanism also includes a positioning mechanism, which includes a clamping part that can move up and down; the positioning mechanism is arranged under the turntable; after the loading station loads the material, the clamping part moves upward to the outside of the material and clamps inward to move the material to a preset position.

[0008] Preferably, the side surface of the workbench has a groove matched with the clamping portion, so that the clamping portion can move laterally in the groove to approach the side edge of the tabletop.

[0009] Preferably, the clamping portion is configured as a clamping plate, a clamping rod or a combination of the two.

[0010] Preferably, the alignment mechanism is arranged below the loading station, and an avoidance position is arranged on the peripheral side of the worktable of the turntable to avoid the clamping part when the clamping part clamps the material.

[0011] Preferably, the alignment mechanism further includes a driving mechanism, which is fixed below the loading station; the clamping portion is disposed on the turntable and is movably fixed to the side of the workbench.

[0012] Preferably, the alignment mechanism is arranged on the turntable, and the clamping portion is movably fixed to the side of the workbench.

[0013] Preferably, a jig is provided on the workbench for carrying the material, and when the alignment mechanism is working, the clamping part clamps the material and / or the jig.

[0014] Preferably, the turntable includes four workbenches, and a precision positioning station is formed above the workbenches; the rotary loading and unloading mechanism also includes a precision positioning component, and the precision positioning component includes an imaging mechanism and a UVW platform; the imaging mechanism is located above the precision positioning station and is used to image the material, and the UVW platform is located below the precision positioning station.

[0015] Preferably, the UVW platform is fixed below the fine positioning station, and a first lifting assembly is provided below the UVW platform; when the jig carrying the material flows to the fine positioning station, the first lifting assembly lifts the UVW platform so that the UVW platform holds up the jig and adjusts the position of the jig according to the imaging of the imaging mechanism.

[0016] Preferably, a second lifting assembly is provided below the pad printing station. When the material flows to the pad printing station, the second lifting assembly rises to abut against the jig to support the jig when the pad printing head is pressed down for pad printing.

[0017] Preferably, a pressure sensor is provided below the jig or the second lifting assembly to monitor the downward pressure of the pad printing head in real time during pad printing.

[0018] Preferably, the rotary pad printing mechanism comprises four pad printing heads, and an ink taking station, a drying station, a pad printing station and a cleaning station are sequentially formed below the four pad printing heads.

[0019] Preferably, the ink taking station has a pad printing plate on which an ink pattern is formed; a UVW platform is provided below the pad printing plate to adjust the position of the ink adhered to the pad printing head.

[0020] Preferably, the drying station is provided with a blower mechanism to evaporate excess liquid in the ink pattern on the pad printing head.

[0021] Preferably, the cleaning station is provided with a cleaning mechanism, which comprises cleaning tape and a reeling mechanism, and the cleaning tape is wound around the reeling mechanism.

[0022] Preferably, an optical detection device is provided above the unloading station, and the optical detection device is used to detect whether the pad printing pattern of the material on the unloading station is at a preset position.

[0023] Preferably, the rotary loading and unloading mechanism also includes a buffer station; after detection, the material whose pad printing pattern is not in the preset position is transported to the buffer station through the loading and unloading assembly.

[0024] Preferably, an inspection table is provided outside the turntable, and an inspection station is formed above the inspection table, and the inspection station is close to the unloading station; an optical inspection device is provided above the inspection station, and the optical inspection device is used to detect whether the pad printing pattern of the material on the inspection station is in a preset position.

[0025] Preferably, a third lifting assembly is arranged below the unloading station, and a rotary adsorption assembly is arranged outside the turntable, and the rotary adsorption assembly includes a rotating shaft, which is arranged between the unloading station and the inspection station; the third lifting assembly is used to lift the material at the unloading station, and the rotary adsorption assembly is used to rotate and transport the lifted material to the inspection station.

[0026] Preferably, the rotary loading and unloading mechanism also includes a buffer station; after detection, the material whose pad printing pattern is not in the preset position is transported to the buffer station through the loading and unloading assembly.

[0027] The pad printing machine provided in the embodiment of the present application includes: a rotating loading and unloading mechanism, which includes a loading and unloading assembly and a turntable; the turntable includes at least three workbenches, and a loading station, a unloading station and a pad printing station are formed above the workbenches; the rotating pad printing mechanism includes at least two pad printing heads, and the pad printing heads are higher than the workbenches; the rotating circumference of the pad printing head partially overlaps with the rotating circumference of the workbenches, and an ink collection station and a pad printing station are formed below the pad printing head; the pad printing station is located at the overlap of the rotating circumference of the workbench and the pad printing head. In this way, while meeting the needs of efficient automated processing, the size of the whole machine is moderate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of an embodiment of the pad printing machine of the utility model;

[0030] Figure 2 for Figure 1 Enlarged view of part A;

[0031] Figure 3 for Figure 1 Enlarged view of part B;

[0032] Figure 4 for Figure 1 Enlarged view of part C;

[0033] Figure 5 for Figure 1 Enlarged view of part D;

[0034] Figure 6 Another schematic diagram of an embodiment of the pad printing machine of the utility model;

[0035] Figure 7 for Figure 6 Enlarged view of part E;

[0036] Figure 8 for Figure 6 Enlarged view of part F;

[0037] Fig. 9 for Figure 6 Enlarged view of part G;

[0038] Fig.10 for Figure 6 Enlarged view of section H;

[0039] Fig.11 A schematic diagram of a rotary pad printing mechanism of an embodiment of the pad printing machine of the utility model;

[0040] Fig.12 A schematic diagram of an imaging mechanism of an embodiment of a pad printing machine of the utility model;

[0041] Fig.13 A schematic diagram of an optical detection device of an embodiment of a pad printing machine of the utility model;

[0042] Fig.14 A schematic diagram of a UVW platform of an embodiment of a pad printing machine of the utility model;

[0043] Fig.15 A schematic diagram of an alignment mechanism of an embodiment of a pad printing machine of the utility model.

[0044] Description of Figure Numbers:

[0045]

[0046]

[0047] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0050] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0051] Pad printing is a type of printing method that can print text, graphics and images on the surface of irregular objects. Pad printing machines are usually equipped with a pad printing head made of silicone rubber material. Pad printing can be completed by applying ink with a pre-set pad printing pattern and pressing up and down on the corresponding position of the material to be pad printed. In order to ensure the pad printing effect, the pad printing machine will position the material before pad printing. The material will be in a preset position before pad printing, which is convenient for the pad printing head to print on it. In addition, in order to achieve assembly line-style automated processing, pad printing machines are generally also equipped with a mechanical structure for loading and unloading materials, thereby reducing labor costs.

[0052] In the prior art, pad printers are provided with corresponding structures that meet the above requirements. However, they still have defects. For example, pad printers are often in single-threaded working mode, and need to work in the order of loading, positioning the material, staining the pad head with ink, and pressing the material with the pad head. This single-threaded working mode will reduce work efficiency because some steps of the pad printer can be performed simultaneously. For example, while loading and positioning the material, the pad head can be destained with ink. In addition, in order to realize automated processing, the pad printer integrates multiple structures such as the above, which makes the entire pad printer too large.

[0053] In order to solve the above problems, this patent provides a pad printing machine that aims to meet the needs of efficient automated processing while having a moderate size.

[0054] For ease of understanding, the specific implementation of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0055] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 8 , Fig.10 and Fig.11 A pad printing machine includes: a rotating loading and unloading mechanism 100, which includes a loading and unloading assembly 110 and a turntable 120; the turntable 120 includes at least three workbenches 121, and a loading station 122, an unloading station 123 and a pad printing station 124 are formed above the workbenches 121; a rotating pad printing mechanism 200 includes at least two pad printing heads 210, and the pad printing heads 210 are higher than the workbenches 121; the rotation circumference of the pad printing head 210 partially overlaps with the rotation circumference of the workbenches 121, and an ink taking station 220 and a pad printing station 124 are formed below the pad printing head 210; the pad printing station 124 is located at the overlapping part of the rotation circumference of the workbenches 121 and the pad printing head 210.

[0056] In this embodiment, the loading and unloading assembly 110 of the rotating loading and unloading mechanism 100 is used to transport the unprinted materials to the loading station 122, and to transport the printed materials away from the unloading station 123. In this embodiment, the implementation method of the loading and unloading assembly 110 is not limited. Preferably, the loading and unloading assembly 110 can be set as a four-axis manipulator, and the position of the loading and unloading assembly 110 can be close to the loading station 122 or the unloading station 123. Being close to the loading station 122 or the unloading station 123 can effectively increase the working efficiency of the loading and unloading assembly 110. The turntable 120 of the rotating loading and unloading mechanism 100 is used to transport the printed materials in the pad printing station 124 to the unloading station 123 by rotating, and to transport the unprinted materials in the loading station 122 to the pad printing station 124 by rotating. The workbench 121 refers to an area of ​​the turntable 120. The turntable 120 includes at least three workbench 121, which means that there are at least three areas of the turntable 120 that serve as the workbench 121. Preferably, the area may be a through hole (a device for carrying materials is provided in the through hole, and a component for supporting the device is provided below the device). A loading station 122, a unloading station 123 and a pad printing station 124 are formed above the workbench 121, which means that the space above the workbench 121 forms the loading station 122, the unloading station 123 and the pad printing station 124, and the materials can be moved to different stations by the rotation of the turntable 120. The ink collection station 220 and the pad printing station 124 are formed below the pad printing head 210, which means that the space below the pad printing head 210 forms the ink collection station 220 and the pad printing station 124, and the pad printing head 210 is stained with ink at the ink collection station 220, and prints the unprinted material at the pad printing station 124. The pad printing station 124 formed below the pad printing head 210 of the rotary pad printing mechanism 200 and the pad printing station 124 formed above the workbench 121 of the rotary disk 120 of the rotary loading and unloading mechanism 100 are the same station. The pad printing head 210 can be moved to the top of the ink taking station 220 or the pad printing station 124 by rotating. In this embodiment, the implementation method of the rotary pad printing mechanism 200 is not limited. Preferably, the rotary pad printing mechanism 200 includes a central column, and at least two pad printing heads 210 are arranged around the central column. The pad printing heads 210 can rotate around the central column at the same time and move to the top of the ink taking station 220 and the pad printing station 124 at the same time. The partial overlap of the rotation circumference of the pad printing head 210 and the rotation circumference of the workbench 121 refers to the partial overlap of the circular motion trajectory formed by the rotation of the pad printing head 210 and the circular motion trajectory formed by the rotation of the workbench 121. The partial overlap refers to the existence of at least one overlapping point of the two circular motion trajectories. The pad printing station 124 is located at the overlapping point of the two circular motion trajectories.

[0057] The pad printing machine needs to complete many working steps when it is working. In this embodiment, the pad printing machine optimizes the way of completing many working steps, which are specifically reflected as follows: 1. When the pad printing head 210 at the pad printing station 124 prints the material on the workbench 121 at the pad printing station 124, the loading and unloading assembly 110 transports the unprinted material to the workbench 121 at the loading station 122, and transports the printed material away from the workbench 121 at the unloading station 123; the pad printing head 210 at the ink taking station 220 takes ink. Second, when the pad printing head 210 at the pad printing station 124 completes printing on the material on the workbench 121 at the pad printing station 124, the turntable 120 rotates to transport the printed material at the pad printing station 124 to the unloading station 123, and the unprinted material at the loading station 122 to the pad printing station 124; the pad printing head 210 that has completed pad printing rotates from above the pad printing station 124 to above the ink taking station 220, and at the same time, the pad printing head 210 that has completed ink taking rotates from above the ink taking station 220 to above the pad printing station 124. Since the numerous working steps of the pad printing machine in this embodiment are optimized in the above manner, multiple working steps among the numerous working steps can be performed simultaneously, saving the time for the pad printing machine to complete the numerous working steps, thereby improving the working efficiency of the pad printing machine and realizing efficient automatic processing.

[0058] In addition, because the rotational circumference of the pad printing head 210 and the rotational circumference of the workbench 121 need to partially overlap, the positions of the rotary loading and unloading mechanism 100 and the rotary pad printing mechanism 200 are close to each other, so that the pad printing machine components are relatively tight. At the same time, because the rotary loading and unloading mechanism 100 and the rotary pad printing mechanism 200 both use a rotating method, the approximate shapes of the two will not be slender, and the pad printing machine will not be irregular in shape, but a square, regular, and compact shape. Therefore, the overall size of the pad printing machine is moderate.

[0059] It should be noted that before the pad printing head 210 prints on the unprinted material, in order to print the ink pattern to a specified position on the unprinted material, the unprinted material needs to be pre-aligned. The specific implementation method that meets the above requirements is not limited in this embodiment. For ease of understanding, this application provides a preferred implementation method.

[0060] See also Figure 1 , Figure 2 and Fig.15 The rotating loading and unloading mechanism 100 also includes a positioning mechanism 130, which includes a clamping portion 131 that can move up and down; the positioning mechanism 130 is arranged under the turntable 120; after the loading station 122 loads the material, the clamping portion 131 moves upward to the outside of the material and clamps inward to move the material to a preset position.

[0061] In this embodiment, after the loading station 122 loads the materials, the alignment operation can be performed on the non-pad-printed materials. Furthermore, the loading of the materials at the loading station 122 and the alignment of the non-pad-printed materials can be performed when the pad printing head 210 at the pad printing station 124 prints the materials on the workbench 121 at the pad printing station 124. This implementation method enables the alignment operation and printing to be performed simultaneously, thereby improving the working efficiency of the pad printing machine. When the loading station 122 loads the materials, the clamping portion 131 does not move upward, so the clamping portion 131 does not hinder the loading of the materials. The inward clamping movement of the clamping portion 131 enables the material to move to a preset position under the clamping action, so that the alignment mechanism 130 completes the alignment operation on the non-pad-printed materials.

[0062] It should be noted that, based on the technical solution of the inward clamping movement of the clamping portion 131, there is a further technical problem of how the clamping portion 131 can achieve inward clamping of the material. In order to solve the above problem, the present application provides a preferred implementation.

[0063] See also Figure 1 and Figure 2 The side of the workbench 121 has a groove 121a adapted to the clamping portion 131, so that the clamping portion 131 can move laterally in the groove 121a to approach the side of the table.

[0064] In this embodiment, a groove 121a adapted to the clamping portion 131 is provided on the side of the workbench 121, so that the clamping portion 131 can move laterally in the groove 121a, thereby approaching the side of the workbench 121, and then clamping the material on the workbench 121 and moving it to a preset position.

[0065] It should be noted that there are multiple implementations of the clamping portion 131. The specific implementation that meets the above requirements is not limited in this embodiment, and for ease of understanding, this application provides a preferred implementation.

[0066] See also Figure 1 , Figure 2 and Fig.15 The clamping portion 131 is configured as a clamping plate, a clamping rod, or a combination of the two.

[0067] In this embodiment, the clamping portion 131 can be configured as a clamping plate, a clamping rod, or a clamping plate and a clamping rod. These implementations can stably clamp the material.

[0068] It should be noted that, in addition to the above-mentioned technical solution of the clamping portion 131 to clamp the material inwardly, there are other implementations. For ease of understanding, the present application provides a preferred implementation.

[0069] Optionally, the alignment mechanism 130 is disposed below the loading station 122 , and an avoidance position is disposed around the worktable 121 of the turntable 120 to avoid the clamping portion 131 when the clamping portion 131 clamps the material.

[0070] In this embodiment, the alignment mechanism 130 is arranged below the loading station 122, so that after the loading station 122 is loaded, the non-printed material can be aligned, so that the loading process and the alignment operation are more closely connected, reducing idle time and improving work efficiency. The side of the workbench 121 of the turntable 120 is provided with an avoidance position, so that the clamping part 131 can perform an inward clamping movement, so that the material moves to a preset position. In this embodiment, the implementation method of the clamping part 131 is not limited. Preferably, the clamping part 131 can be set as a rotatable connecting rod, and the connecting rod rotates from the outside to the inside to achieve the effect of clamping the material.

[0071] It should be noted that, in addition to the above-mentioned technical solution of the clamping portion 131 to clamp the material inwardly, there are other implementations. For ease of understanding, the present application provides a preferred implementation.

[0072] Optionally, the alignment mechanism 130 further includes a driving mechanism, which is fixed below the loading station 122 ; the clamping portion 131 is disposed on the turntable 120 and is movably fixed to a side of the workbench 121 .

[0073] In this embodiment, the alignment mechanism 130 includes a driving mechanism that can drive the clamping portion 131 to move. The clamping portion 131 is disposed on the turntable 120 and is movably fixed to the side of the workbench 121, so that the clamping portion 131 can clamp the material inward under the drive of the driving mechanism and move the material to a preset position.

[0074] It should be noted that, in addition to the above-mentioned technical solution of the clamping portion 131 to clamp the material inwardly, there are other implementations. For ease of understanding, the present application provides a preferred implementation.

[0075] Optionally, the alignment mechanism 130 is disposed on the turntable 120 , and the clamping portion 131 is movably fixed to a side of the workbench 121 .

[0076] In this embodiment, the alignment mechanism 130 is disposed on the turntable 120, so that after the material is loaded at the loading station 122, the non-printed material can be aligned, so that the loading process and the alignment operation are more closely connected, reducing idle time and improving work efficiency. The clamping part 131 can be movably fixed to the side of the workbench 121, so that the clamping part 131 can clamp the material inwardly and move the material to a preset position.

[0077] It should be noted that the pad printed material is generally carried by a device, and on this basis, there is a technical problem of how the clamping portion 131 moves the material to a preset position. In order to solve the above problem, the present application provides a preferred implementation method.

[0078] See also Figure 1 and Figure 2 A fixture 140 is provided on the workbench 121 for carrying materials. When the alignment mechanism 130 is working, the clamping part 131 clamps the materials and / or the fixture 140 .

[0079] In this embodiment, the device for carrying the material can be set as a jig 140, and the jig 140 is set on the workbench 121. When the alignment mechanism 130 performs an alignment operation on the non-printed material, the clamping part 131 can move the non-printed material to a preset position by clamping the material, clamping the jig 140, or clamping the material and the jig 140.

[0080] It should be noted that the alignment mechanism 130 performs a pre-alignment operation on the non-pad printed material. Furthermore, since the alignment operation of the alignment mechanism 130 may have errors, when the ink pattern is printed on the material, the pattern will be slightly offset. Therefore, there is also a technical problem of how to eliminate the error. In order to solve the above problem, the present application provides a preferred implementation method.

[0081] See also Figure 6 , Fig. 9 , Fig.12 and Fig.14 The turntable 120 includes four workbenches 121, and a fine positioning station 125 is formed above the workbench 121; the rotary loading and unloading mechanism 100 also includes a fine positioning component 150, and the fine positioning component 150 includes an imaging mechanism 151 and a UVW platform 152; the imaging mechanism 151 is located above the fine positioning station 125 and is used to image the material, and the UVW platform 152 is located below the fine positioning station 125.

[0082] In this embodiment, the imaging mechanism 151 images the material, so that the offset coordinates of the material can be obtained. The UVW platform 152 located below the precision positioning station 125 can adjust the position according to the offset coordinates, thereby eliminating the error of the previous alignment operation. The UVW platform 152 is a three-axis parallel motion mechanism that can rotate at any point on its plane and can translate in any direction. This platform cooperates with the imaging mechanism 151 to quickly complete high-precision deviation correction work, and its repeated positioning accuracy can usually reach ±1μm.

[0083] It should be noted that, based on the technical solution of eliminating the previous alignment operation error through the UVW platform 152, there is a further technical problem of how the UVW platform 152 adjusts the position. In order to solve the above problem, the present application provides a preferred implementation.

[0084] Optionally, the UVW platform 152 is fixed under the fine positioning station 125, and a first lifting assembly is provided under the UVW platform 152; when the jig 140 carrying the material flows to the fine positioning station 125, the first lifting assembly lifts the UVW platform 152 so that the UVW platform 152 supports the jig 140 and adjusts the position of the jig 140 according to the imaging of the imaging mechanism 151.

[0085] In this embodiment, a first lifting assembly is provided under the UVW platform 152, so that the UVW platform 152 can be lifted upward by the first lifting assembly, thereby lifting the jig 140 carrying the material located at the fine positioning station 125. At the same time, according to the imaging of the imaging mechanism 151, the jig 140 is adjusted, and then the position of the material is adjusted, thereby finally eliminating the error of the previous positioning operation.

[0086] It should be noted that when the pad printing head 210 at the pad printing station 124 prints the material on the workbench 121 at the pad printing station 124, the pad printing head 210 will press the material downward. Since the material is located on the workbench 121, the force exerted by the pad printing head 210 pressing downward will cause the turntable 120 to tilt and affect the turntable 120. Therefore, it is necessary to avoid affecting the turntable 120.

[0087] The specific implementation method that meets the above requirements is not limited in this embodiment. For ease of understanding, this application provides a preferred implementation method.

[0088] Optionally, a second lifting assembly is provided below the pad printing station 124 . When the material flows to the pad printing station 124 , the second lifting assembly rises to abut against the jig 140 , so as to support the jig 140 when the pad printing head 210 is pressed down for pad printing.

[0089] In this embodiment, the second lifting component rises to abut the jig 140, which can apply an upward force to the jig 140, so that when the pad printing head 210 is pressed down for pad printing, the jig 140 is supported, and the force applied by the pad printing head 210 is offset, thereby avoiding the impact on the turntable 120. The second lifting component rises to abut the jig 140, which can lift the jig 140 so that the jig 140 is located above the turntable 120, or it can not lift the jig 140.

[0090] It should be noted that in order to ensure that the pad printing pattern is clear, the pressure of the pad printing head 210 needs to be kept within a reasonable range. The specific implementation method that meets the above requirements is not limited in this embodiment. For ease of understanding, this application provides a preferred implementation method.

[0091] Optionally, a pressure sensor is provided below the jig 140 or the second lifting assembly to monitor the downward pressure of the pad printing head 210 in real time during pad printing.

[0092] In this embodiment, a pressure sensor is provided below the jig 140 or at the second lifting assembly so that the pressure of the pad printing head 210 during pad printing can be detected by the pressure sensor, thereby allowing the user to adjust the machine to keep the pressure of the pad printing head 210 within a reasonable range.

[0093] It should be noted that, in order to make the pad printing pattern clear, it is necessary to clean the ink remaining on the pad printing head 210 after pad printing, and before the pad printing head 210 prints the material, the excess liquid on the pad printing head 210 is dried. The specific implementation method that meets the above requirements is not limited in this embodiment. For ease of understanding, this application provides a preferred implementation method.

[0094] See also Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 The rotary pad printing mechanism 200 includes four pad printing heads 210 , and an ink taking station 220 , a drying station 240 , a pad printing station 124 and a cleaning station 250 are sequentially formed below the four pad printing heads 210 .

[0095] In this embodiment, an ink taking station 220, a drying station 240, a pad printing station 124 and a cleaning station 250 are sequentially formed below the four pad printing heads 210, so that the pad printing head 210 can clean the ink remaining after pad printing at the cleaning station 250, and dry the excess liquid at the drying station 240. The ink taking station 220, the drying station 240, the pad printing station 124 and the cleaning station 250 are sequentially formed, so that the pad printing head 210 that moves to the top of different stations by rotation will move to the top of different stations in sequence according to the above order, so that the pad printing head 210 can clean the ink remaining after pad printing on the pad printing head 210 before taking ink, and dry the excess liquid on the pad printing head 210 before printing the material.

[0096] It should be noted that when the pad printing head 210 takes ink, it is necessary to adjust the error of the ink pattern position at the ink taking station 220, so that the position of the ink pattern on the pad printing head 210 is accurate, and then the position of the ink pattern on the material is accurate. The specific implementation method that meets the above requirements is not limited in this embodiment. For ease of understanding, this application provides a preferred implementation method.

[0097] See also Figure 1 , Figure 5 and Fig.14 The ink taking station 220 has a pad printing plate 260 on which an ink pattern is formed; a UVW platform 152 is provided below the pad printing plate 260 to adjust the position of the ink adhered to the pad printing head 210 .

[0098] In this embodiment, a UVW platform 152 is provided below the pad printing plate 260, and the UVW platform 152 can adjust the position of the ink pattern on the pad printing plate 260 by adjusting the pad printing plate 260. The UVW platform 152 below the pad printing plate 260 can cooperate with the imaging mechanism 151 at the fine positioning station 125 to complete the correction work. Specifically, after the UVW platform 152 at the fine positioning station 125 completes the correction work on the non-pad printed material, the imaging mechanism 151 can image the non-pad printed material again, and the UVW platform 152 below the pad printing plate 260 adjusts the position of the pad printing plate 260 according to the result of the re-imaging, thereby achieving the correction of the ink pattern position, so that the position of the ink pattern stained on the pad printing head 210 is accurate.

[0099] It should be noted that, based on the technical solution of forming the drying station 240, there is a further technical problem of how to dry the excess liquid on the pad printing head 210. In order to solve the above problem, the present application provides a preferred implementation.

[0100] See also Figure 1 and Figure 4 The drying station 240 is provided with a blower mechanism 270 to evaporate excess liquid in the ink pattern on the pad printing head 210 .

[0101] In this embodiment, a blower mechanism 270 for blowing hot air is provided at the drying station 240, so that the excess liquid on the pad printing head 210 is dried and evaporated. In this embodiment, the temperature of the hot air is not limited, and preferably, the temperature of the hot air can be between 70 degrees Celsius and 110 degrees Celsius.

[0102] It should be noted that, based on the technical solution of forming the cleaning station 250, there is a further technical problem of how to clean the residual ink on the pad printing head 210 after pad printing. In order to solve the above problem, the present application provides a preferred implementation.

[0103] See also Figure 6 and Figure 7 The cleaning station 250 is provided with a cleaning mechanism 280 , and the cleaning mechanism 280 includes a cleaning adhesive paper 281 and a reeling mechanism 282 , and the cleaning adhesive paper 281 is wound around the reeling mechanism 282 .

[0104] In this embodiment, the cleaning adhesive paper 281 of the cleaning mechanism 280 is used to remove the ink remaining after pad printing on the pad printing head 210, and the unwinding mechanism 282 of the cleaning mechanism 280 is used to roll the cleaning adhesive paper 281 so that the cleaning adhesive paper 281 at the cleaning station 250 remains clean. Therefore, the pad printing head 210 can clean the ink remaining after pad printing at the cleaning station 250.

[0105] It should be noted that after pad printing is completed, the position of the ink pattern on the pad printed material at the unloading station 123 needs to be detected to distinguish good products from defective products. The specific implementation method that meets the above requirements is not limited in this embodiment. For ease of understanding, this application provides a preferred implementation method.

[0106] See also Figure 1 and Fig.13 An optical detection device 160 is disposed above the unloading station 123 , and the optical detection device 160 is used to detect whether the pad printing pattern of the material on the unloading station 123 is at a preset position.

[0107] In this embodiment, an optical detection device 160 is arranged above the unloading station 123 to detect the position of the ink pattern on the printed material, thereby distinguishing good products whose ink pattern is located at the preset position from defective products whose ink pattern is not located at the preset position. In this embodiment, the implementation method of the optical detection device 160 is not limited. Preferably, the optical detection device 160 can be set as a device using a high-speed and high-precision optical image detection system (AOI, Automated Optical Inspection).

[0108] It should be noted that after the pad printed materials at the unloading station 123 are distinguished from defective products whose ink patterns are not in the preset position, the defective products need to be sorted out for manual review. The specific implementation method that meets the above requirements is not limited in this embodiment. For ease of understanding, this application provides a preferred implementation method.

[0109] See also Figure 1 and Figure 6 The rotating loading and unloading mechanism 100 also includes a buffer station 170 ; after detection, the material whose pad printing pattern is not in the preset position is transported to the buffer station 170 through the loading and unloading assembly 110 .

[0110] In this embodiment, the rotary loading and unloading mechanism 100 includes a buffer station 170, and defective products are transported to the buffer station 170 through the loading and unloading assembly 110, so that the defective products can be sorted to the buffer station 170 for manual review.

[0111] It should be noted that after pad printing is completed, the position of the ink pattern on the pad-printed material at the unloading station 123 needs to be detected to distinguish good products from defective products. The specific implementation method that meets the above requirements is not limited in this embodiment. For ease of understanding, this application provides another preferred implementation method.

[0112] See also Figure 1 , Figure 3 An inspection table 300 is arranged outside the turntable 120, and an inspection station 310 is formed above the inspection table 300, and the inspection station 310 is close to the unloading station 123; an optical inspection device 160 is arranged above the inspection station 310, and the optical inspection device 160 is used to detect whether the pad printing pattern of the material on the inspection station 310 is in a preset position.

[0113] In this embodiment, the inspection station 310 is close to the unloading station 123, which facilitates the transportation of the pad-printed materials from the unloading station 123 to the inspection station 310, thereby reducing the transportation time. By arranging an optical inspection device 160 above the inspection station 310, the position of the ink pattern on the pad-printed material can be detected, and good products with the ink pattern located at the preset position and defective products with the ink pattern not located at the preset position can be distinguished.

[0114] It should be noted that, based on the technical solution of inspecting the material at the inspection station 310, there is a further technical problem of how to transport the pad-printed material at the unloading station 123 to the inspection station 310. In order to solve the above problem, the present application provides a preferred implementation.

[0115] See also Figure 1 , Figure 3 A third lifting assembly is arranged below the unloading station 123, and a rotary adsorption assembly 400 is arranged outside the turntable 120. The rotary adsorption assembly 400 includes a rotating shaft, which is arranged between the unloading station 123 and the detection station 310; the third lifting assembly is used to lift the material at the unloading station 123, and the rotary adsorption assembly 400 is used to rotate and transport the lifted material to the detection station 310.

[0116] In this embodiment, the third lifting assembly can lift up the printed material at the unloading station 123 to facilitate the rotary adsorption assembly 400 to transport the material. The rotating shaft of the rotary adsorption assembly 400 is arranged between the unloading station 123 and the detection station 310, so that the distance required for the rotary adsorption assembly 400 to transport the material is small, thereby reducing the transportation time. In this embodiment, there is no limitation on how the rotary adsorption assembly 400 adsorbs, and it can directly adsorb the material, or adsorb the jig 140 that carries the material, or adsorb the material and the jig 140.

[0117] It should be noted that after the pad printed material is distinguished as defective products whose ink patterns are not in the preset position, the defective products need to be sorted out for manual review. The specific implementation method that meets the above requirements is not limited in this embodiment. For ease of understanding, this application provides a preferred implementation method.

[0118] See also Figure 1 and Figure 6 The rotating loading and unloading mechanism 100 also includes a buffer station 170 ; after detection, the material whose pad printing pattern is not in the preset position is transported to the buffer station 170 through the loading and unloading assembly 110 .

[0119] In this embodiment, the rotary loading and unloading mechanism 100 includes a buffer station 170, and defective products are transported to the buffer station 170 through the loading and unloading assembly 110, so that the defective products can be sorted to the buffer station 170 for manual review.

[0120] In summary, the pad printing machine provided in the embodiment of the present application includes: a rotating loading and unloading mechanism 100, which includes a loading and unloading assembly 110 and a turntable 120; the turntable 120 includes at least three workbenches 121, and a loading station 122, a unloading station 123 and a pad printing station 124 are formed above the workbenches 121; a rotating pad printing mechanism 200 includes at least two pad printing heads 210, and the pad printing heads 210 are higher than the workbenches 121; the rotation circumference of the pad printing head 210 partially overlaps with the rotation circumference of the workbenches 121, and an ink taking station 220 and a pad printing station 124 are formed below the pad printing head 210; the pad printing station 124 is located at the overlap of the rotation circumference of the workbenches 121 and the pad printing head 210. In this way, while meeting the needs of efficient automated processing, the size of the whole machine is moderate.

[0121] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pad printing machine, characterized in that: include: A rotating loading and unloading mechanism, the rotating loading and unloading mechanism comprising a loading and unloading assembly and a turntable; the turntable comprises at least three workbenches, and a loading station, an unloading station and a pad printing station are formed above the workbenches; The rotary pad printing mechanism comprises at least two pad printing heads, wherein the pad printing heads are higher than the workbench; the rotational circumference of the pad printing heads partially overlaps with the rotational circumference of the workbench, and an ink taking station and the pad printing station are formed below the pad printing heads; the pad printing station is located at the overlapping part of the rotational circumference of the workbench and the pad printing head.

2. The pad printing machine according to claim 1, characterized in that: The rotating loading and unloading mechanism also includes a positioning mechanism, which includes a clamping part that can move up and down; the positioning mechanism is arranged below the turntable; after the loading station loads the material, the clamping part moves upward to the outside of the material and clamps inward to move the material to a preset position.

3. The pad printing machine according to claim 2, characterized in that: The side surface of the workbench is provided with a groove matched with the clamping portion, so that the clamping portion can move laterally in the groove to approach the side edge of the workbench.

4. The pad printing machine according to claim 3, characterized in that: The clamping portion is configured as a clamping plate, a clamping rod or a combination of the two.

5. The pad printing machine according to claim 2, characterized in that: The alignment mechanism is arranged below the loading station, and an avoidance position is arranged on the peripheral side of the worktable of the turntable to avoid the clamping part when the clamping part clamps the material.

6. The pad printing machine according to claim 2, characterized in that: The alignment mechanism also includes a driving mechanism, which is fixed below the loading station; the clamping part is arranged on the turntable and can be movably fixed to the side of the workbench.

7. The pad printing machine according to claim 2, characterized in that: The alignment mechanism is arranged on the turntable, and the clamping part is movably fixed on the side of the workbench.

8. The pad printing machine according to any one of claims 2 to 7, characterized in that: The workbench is provided with a jig for carrying materials. When the alignment mechanism is working, the clamping part clamps the materials and / or the jig.

9. The pad printing machine according to claim 8, characterized in that: The turntable includes four workbenches, and a precision positioning station is formed above the workbenches; The rotary loading and unloading mechanism also includes a precision positioning component, which includes an imaging mechanism and a UVW platform; the imaging mechanism is located above the precision positioning station and is used to image the material, and the UVW platform is located below the precision positioning station.

10. The pad printing machine according to claim 9, characterized in that: The UVW platform is fixed below the fine positioning station, and a first lifting component is provided below the UVW platform; when the jig carrying the material flows to the fine positioning station, the first lifting component lifts the UVW platform so that the UVW platform holds up the jig and adjusts the position of the jig according to the imaging of the imaging mechanism.

11. The pad printing machine according to claim 8, characterized in that: A second lifting assembly is provided below the pad printing station. When the material flows to the pad printing station, the second lifting assembly rises to abut against the jig to support the jig when the pad printing head is pressed down for pad printing.

12. The pad printing machine according to claim 11, characterized in that: A pressure sensor is provided under the jig or under the second lifting assembly to monitor the downward pressure of the pad printing head in real time during pad printing.

13. The pad printing machine according to any one of claims 1 to 7, characterized in that: The rotary pad printing mechanism comprises four pad printing heads, and an ink taking station, a drying station, a pad printing station and a cleaning station are sequentially formed below the four pad printing heads.

14. The pad printing machine according to claim 13, characterized in that: The ink taking station has a pad printing plate on which an ink pattern is formed; a UVW platform is arranged below the pad printing plate to adjust the position of the ink adhered to the pad printing head.

15. The pad printing machine according to claim 13, characterized in that: The drying station is provided with a blower mechanism to evaporate the excess liquid in the ink pattern on the pad printing head.

16. The pad printing machine according to claim 13, characterized in that: The cleaning station is provided with a cleaning mechanism, which comprises cleaning adhesive tape and a reeling mechanism, and the cleaning adhesive tape is wound around the reeling mechanism.

17. The pad printing machine according to any one of claims 1 to 7, characterized in that: An optical detection device is arranged above the material unloading station, and the optical detection device is used to detect whether the pad printing pattern of the material on the material unloading station is at a preset position.

18. The pad printing machine according to claim 17, characterized in that: The rotary loading and unloading mechanism also includes a buffer station; after detection, the material whose pad printing pattern is not in the preset position is transported to the buffer station through the loading and unloading assembly.

19. The pad printing machine according to any one of claims 1 to 7, characterized in that: A detection platform is arranged outside the turntable, and a detection station is formed above the detection platform, and the detection station is close to the unloading station; An optical detection device is arranged above the detection station, and the optical detection device is used to detect whether the pad printing pattern of the material on the detection station is at a preset position.

20. The pad printing machine according to claim 19, characterized in that: A third lifting assembly is arranged below the unloading station, a rotating adsorption assembly is arranged outside the turntable, and the rotating adsorption assembly includes a rotating shaft, and the rotating shaft is arranged between the unloading station and the detection station; The third lifting assembly is used to lift the material at the unloading station, and the rotary adsorption assembly is used to rotate and transport the lifted material to the inspection station.

21. The pad printing machine according to claim 20, characterized in that: The rotary loading and unloading mechanism also includes a buffer station; after detection, the material whose pad printing pattern is not in the preset position is transported to the buffer station through the loading and unloading assembly.

Images