A pressure-controlled pad printing machine head device

Abstract

This utility model relates to a pressure-controlled pad printing machine pad device, wherein the pad printing machine pad device includes: a pad unit, a workpiece carrying unit, and a lifting support unit; the pad unit, workpiece carrying unit, and lifting support unit are arranged at intervals from top to bottom; the pad unit is provided with at least one pad assembly; the workpiece carrying unit is provided with at least one workpiece fixture for carrying the workpiece; the lifting support unit is provided with a support member for abutting against the workpiece fixture and a pressure sensor for contacting the workpiece on the workpiece fixture; the lifting support unit lifts the workpiece fixture based on the support member so that the workpiece fixture is separated from the workpiece carrying unit, and the pressure sensor contacts the workpiece; the pad assembly presses the workpiece based on its pad and controls the pressure of the pad based on the pressure value fed back by the pressure sensor.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment, and in particular to a pad printing machine with pressure control. Background Technology

[0002] In practical applications of pad printing machines, the pad printing head device and its pressure control play a decisive role in the quality of printing. However, current pad printing machines on the market have serious problems in pressure control, especially in the installation method of the pressure sensor.

[0003] Traditional pad printing machines mount pressure sensors on the printing head or on the printing head mount. This seemingly conventional mounting method, however, causes a series of negative effects during actual operation. When the pad printing machine is working, the printing head needs to press down to complete the operation. During this process, because the pressure sensor is mounted on the printing head or on the printing head mount, its own weight and the force applied when detecting pressure will additionally increase the pressure on the carrier turntable when the printing head presses down. Under these conditions, this additional pressure will cause the carrier turntable to easily deflect downwards during the printing head's downward pressing process. For example, Chinese patent CN107264013A discloses an automatically adaptable intelligent pad printing machine system, which includes a pad printing machine printing head, a sensor, a signal receiver, and a pad printing machine printing head connecting rod. The sensor is connected to the signal receiver, and the signal receiver is connected to the pad printing machine printing head connecting rod. The sensor is located inside the pad printing machine printing head and is used to sense the height of objects on the conveyor belt. The sensor sends a corresponding height signal to the signal receiver, which controls the height of the pad printing machine printing head connecting rod, which in turn controls the pad printing machine printing head. In this design, the pressure sensor is installed inside the printing head, which obviously affects its accuracy during the printing process due to the support below. For example, Chinese patent CN215751358U discloses a printing head assembly, a printing head, and a printing device. The printing head assembly includes a bracket, an electric mechanism, a lead screw module, a sensing module, and a printing head module. The electric mechanism is mounted on the bracket. The lead screw module includes a first lead screw and a first slider sleeved on the first lead screw. The first lead screw is connected to the electric mechanism to drive its rotation. The first slider is connected to the sensing module to move the sensing module. The printing head module is connected to the sensing module. The sensing module includes a first mounting plate, a second mounting plate, and a pressure sensor. The first mounting plate and the second mounting plate are connected and form a cavity, in which the pressure sensor is placed. The first mounting plate is connected to the first slider. The printing head module is mounted on the second mounting plate, and the pressure sensor is connected to the printing head module to detect the pressure of the printing head module in real time. In this design, the pressure sensor is mounted on the mounting base of the printing head, which also means that the accuracy during the printing process is affected by the support below.

[0004] As a crucial component supporting the printed workpiece, the stability of the printing turntable directly impacts printing accuracy. If the turntable deflects downwards, the actual path and angle of the printing head's downward pressure change, resulting in a significant error between the output pressure and the preset value. This pressure output error has a severely detrimental effect on print quality. For example, when printing high-precision, intricate patterns, even extremely small pressure deviations can lead to uneven line thickness, inconsistent color intensity, and in severe cases, even pattern deformation or missing elements, significantly reducing the product yield. Moreover, this pressure error is uncertain and random; the degree of turntable deflection may vary with each pressing operation, resulting in inconsistent printing quality even within the same batch of products, causing considerable production disruptions.

[0005] Furthermore, due to significant errors in the downward pressure output, operators often need to spend considerable time and effort adjusting printing parameters to try and compensate for the impact of pressure errors. This not only reduces production efficiency and increases labor costs, but also places extremely high demands on the professional skills and experience of operators, further limiting the application of pad printing machines in large-scale, high-efficiency production scenarios.

[0006] In addition, when the carrier turntable operates under pressure and deflection for a long time, it is prone to irreversible changes such as deformation of the carrier turntable and shaking of the connection position, which gradually deteriorates the running accuracy and imprinting effect of the carrier turntable. Utility Model Content

[0007] The purpose of this invention is to provide a pad printing machine with pressure control.

[0008] To achieve the above-mentioned utility model objectives, this utility model provides a pad printing machine pad device with pressure control, comprising: a pad unit, a workpiece bearing unit, and a lifting support unit;

[0009] The rubber head unit, workpiece bearing unit, and lifting support unit are arranged at intervals from top to bottom;

[0010] The glue head unit is provided with at least one glue head assembly;

[0011] The workpiece carrying unit is provided with at least one workpiece fixture for carrying the workpiece;

[0012] The lifting support unit is provided with a support member for abutting against the workpiece fixture and a pressure sensor for contacting the workpiece on the workpiece fixture;

[0013] The lifting support unit lifts the workpiece fixture based on the support member so that the workpiece fixture is separated from the workpiece bearing unit, and the pressure sensor comes into contact with the workpiece;

[0014] The rubber head assembly presses the workpiece with its set rubber head, and controls the pressure of the rubber head based on the pressure value fed back by the pressure sensor.

[0015] According to one aspect of the present invention, the rubber head assembly further includes: a first driver, a first linear movement mechanism, a first two-dimensional adjustment platform, and a rubber head mounting base;

[0016] The first driver, the first linear movement mechanism, the first two-dimensional adjustment platform, and the rubber head mounting base are connected in sequence.

[0017] The first linear moving mechanism controls the first two-dimensional adjustment platform and the rubber head mounting base to reciprocate in the vertical direction under the action of the first driver.

[0018] According to one aspect of the present invention, the rubber head unit further includes: a first rotational support;

[0019] The first rotational support includes: a first rotational drive and a rotational bearing structure connected to the first rotational drive shaft;

[0020] The rubber head assembly is connected to the rotating bearing structure.

[0021] According to one aspect of the present invention, the workpiece bearing unit further includes: a second rotating support and a fixture bearing disk connected to the rotating shaft of the second rotating support;

[0022] The fixture support plate is provided with a fixture mounting position for mounting the workpiece fixture;

[0023] The workpiece fixture is designed so that the fixture mounting position and the fixture support plate are separable.

[0024] According to one aspect of the present invention, the workpiece fixture is connected to the fixture carrier plate by magnetic attraction and / or vacuum adsorption.

[0025] According to one aspect of the present invention, the fixture mounting position is a groove structure, and the bottom of the fixture mounting position is provided with a first channel for the support member to pass through.

[0026] According to one aspect of the present invention, the bottom of the fixture mounting position is based on a detachable fixture support plate.

[0027] According to one aspect of the present invention, the workpiece fixture includes: an annular fixture body;

[0028] The upper side of the fixture body serves as the support surface for the workpiece.

[0029] An adsorption groove for adsorbing the workpiece is provided on the supporting surface;

[0030] 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.

[0031] According to one aspect of the present invention, the lifting support unit further includes: a second driver, a second linear movement mechanism, and a support mounting base;

[0032] The second driver, the second linear movement mechanism, and the support mounting base are connected in sequence from bottom to top;

[0033] The second linear movement mechanism controls the support mounting base to reciprocate in the vertical direction under the action of the second driver;

[0034] The support member is detachably connected to the support member mounting base.

[0035] According to one aspect of this utility model, in the pad printing machine's printing head device, a workpiece carrying unit is used to carry and transfer the workpiece, and a lifting support unit is used to lift the workpiece fixture into position. After the workpiece fixture is lifted into position and disengaged from the workpiece carrying unit, the printing head unit presses downwards, so that the force transmission of the printing process on the workpiece is only completed between the printing head unit and the lifting support unit, realizing physical separation from the workpiece carrying unit and effectively avoiding the influence of the workpiece carrying unit on the output pressure during the printing process.

[0036] According to one aspect of this utility model, by employing a lifting support unit to lift the workpiece fixture and detach it from the workpiece bearing unit, this effectively eliminates the imprinting deviation caused by the workpiece bearing unit and also fully protects the workpiece bearing unit, which is more beneficial for ensuring the long-term stable operation of the workpiece bearing unit.

[0037] According to one embodiment of this invention, by employing a combination of a glue head unit, a workpiece carrying unit, and a lifting support unit, multiple workpiece fixtures can be supported by the workpiece carrying unit, and multiple glue head assemblies can be set up by the glue head unit. Therefore, automated control can be used to achieve continuous operation of multiple workpieces in different imprinting processes, greatly improving the imprinting efficiency of this invention. Furthermore, the lifting support unit, with pressure sensors mounted on it, greatly ensures uniform pressure control for each workpiece in each imprinting process, further guaranteeing the control accuracy and consistency of this invention.

[0038] According to one aspect of this utility model, by setting the pressure sensor on the lifting support unit, the number of pressure sensors is effectively reduced. Based on this setting method, the contact between the pressure sensor and the workpiece during the lifting process can be used to fully detect whether the workpiece is installed in place. Furthermore, by setting the output of the pressure sensor to zero, the pressure during the imprinting process can be accurately detected and controlled, which is more beneficial to ensuring the imprinting effect of this utility model. Attached Figure Description

[0039] Figure 1 This is a three-dimensional structural view of a pressure-controlled pad printing machine device according to one embodiment of the present invention.

[0040] Figure 2 This is a side view of the structure of a pressure-controlled pad printing machine device according to one embodiment of the present invention.

[0041] Figure 3 A perspective view of a first two-dimensional adjustment platform according to one embodiment of the present invention;

[0042] Figure 4 This is a side view of a first two-dimensional adjustment platform according to one embodiment of the present invention;

[0043] Figure 5 This is a top view of the structure of a pressure-controlled pad printing machine device according to one embodiment of the present invention.

[0044] Figure 6 for Figure 1 A magnified view of position A in the middle;

[0045] Figure 7 This is a perspective view of the lifting support unit and the workpiece bearing unit according to one embodiment of the present utility model.

[0046] Figure 8 This is a cross-sectional view of the lifting support unit and the workpiece bearing unit according to one embodiment of the present invention;

[0047] Figure 9 This is a cross-sectional view of the support member and workpiece fixture according to one embodiment of the present invention. Detailed Implementation

[0048] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0049] In describing embodiments of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" express orientations or positional relationships based on the orientations or positional relationships shown in the relevant drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0050] 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.

[0051] Combination Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, a pad printing machine pad device with pressure control includes: a pad unit 1, a workpiece carrying unit 2, and a lifting support unit 3. In this embodiment, the pad unit 1, the workpiece carrying unit 2, and the lifting support unit 3 are arranged at intervals from top to bottom. The pad printing machine pad device of the present invention uses the workpiece carrying unit 2 to mount the workpiece, and uses the transfer action of the workpiece carrying unit 2 to adjust the position of different workpieces relative to the pad unit 1, stopping once the workpiece is in place. Furthermore, the combination of the vertically arranged pad unit 1 and the lifting support unit 3 achieves the printing effect on the workpiece.

[0052] In this embodiment, the glue head unit 1 is provided with at least one glue head assembly 11; wherein, the lower end of the glue head assembly 11 is provided with a glue head 11a for imprinting, and the glue head 11a can be configured as an elastic structural component to achieve matching with the workpiece surface, thereby achieving the corresponding precise imprinting effect.

[0053] In this embodiment, the workpiece carrying unit 2 is provided with at least one workpiece fixture 21 for carrying the workpiece; wherein, the workpiece fixture 21 can be detachably installed at a corresponding position on the workpiece carrying unit 2, thereby allowing the workpiece fixture 21 to be replaced and matched according to different workpieces, thus greatly improving the flexibility of use of this utility model.

[0054] In this embodiment, the lifting support unit 3 is provided with a support member 3a for abutting against the workpiece fixture 21 and a pressure sensor 3b for contacting the workpiece on the workpiece fixture 21; wherein, the support member 3a can be a solid structure with high hardness, such as a metal structure.

[0055] In this embodiment, the lifting support unit 3 lifts the workpiece fixture 21 based on the support member 3a so that the workpiece fixture 21 is separated from the workpiece carrying unit 2, and the pressure sensor 3b comes into contact with the workpiece; thereby, the rubber head assembly 11 presses the workpiece based on its rubber head 11a, and controls the pressure of the rubber head 11a based on the pressure value fed back by the pressure sensor 3b, thereby ensuring that the rubber head assembly 11 has a consistent pressing pressure on each workpiece.

[0056] Combination Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the rubber head assembly 11 further includes: a first driver 111, a first linear movement mechanism 112, a first two-dimensional adjustment platform 113, and a rubber head mounting base 114; wherein, the first driver 111, the first linear movement mechanism 112, the first two-dimensional adjustment platform 113, and the rubber head mounting base 114 are connected in sequence; specifically, the first linear movement mechanism 112 controls the first two-dimensional adjustment platform 113 and the rubber head mounting base 114 to reciprocate in the vertical direction under the action of the first driver 111. In this embodiment, the first driver 111 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. Further, the first linear movement mechanism 112 is configured as a mechanical transmission structure that converts the rotation of the first driver 111 into linear displacement, specifically based on a threaded screw to achieve the corresponding conversion effect, so as to accurately convert the output of the first driver 111 into a linear extension and retraction action.

[0057] Combination Figure 3 and Figure 4As shown, according to one embodiment of the present invention, the first two-dimensional adjustment platform 113 is used to realize displacement adjustment in the horizontal direction. Specifically, the first two-dimensional adjustment platform 113 includes: a first platform part 113a, a middle part 113b, and a second platform part 133c; wherein, the first platform part 113a and the second platform part 133c are located on the upper and lower sides of the middle part 113b respectively, and are respectively connected by sliding connection to realize displacement adjustment between them. In this embodiment, the first platform portion 113a includes: a first platform plate 113a1, a first sliding boss 113a2 provided on one side of the first platform plate 113a1 in the thickness direction, a first adjusting connecting seat 113a3 respectively provided in the first direction of the first platform plate 113a1, and a first position adjusting member 113a4 threadedly connected to the first adjusting connecting seat 113a3; wherein, the first platform plate 113a1 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 113, it is necessary to set the flatness, parallelism, etc. of the two sides of the first platform plate 113a1 in the thickness direction respectively.

[0058] In this embodiment, the first sliding boss 113a2 extends along the first direction of the first platform plate 113a1. Therefore, the position of the first platform plate 113a1 relative to the middle portion 113b can be adjusted based on the sliding engagement between the first sliding boss 113a2 and the middle portion 113b. Furthermore, the cross-sectional shape of the first sliding boss 113a2 is an isosceles trapezoid. The narrower upper surface of the first sliding boss 113a2 is fixedly connected to the lower side of the first platform plate 113a1. This allows for convenient sliding engagement between the first sliding boss 113a2 and the middle portion 113b while effectively restricting their degrees of freedom in the non-sliding direction.

[0059] Furthermore, the position of the first platform plate 113a1 is adjusted and restricted by the first adjusting connecting seat 113a3 and the first position adjusting member 113a4. In this embodiment, the first adjusting connecting seat 113a3 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 adjusting connecting seat 113a3 is provided at the end of the first platform plate 113a1 in the first direction, so that the first adjusting connecting seat 113a3 can be fixedly installed at the end of the first platform plate 113a1 based on the threaded connector. In addition, the first position adjusting member 113a4 is a connecting threaded hole. The first adjusting connector 113a3 and the middle part 113b are screwed together through the connecting threaded hole of the first adjusting connector 113a3. The connecting threaded hole of the first adjusting connector 113a3 is opposite to the middle part 113b. Thus, by rotating the first position adjusting member 113a4, the position between the first platform part 113a and the middle part 113b can be precisely adjusted based on the abutment between the end of the first position adjusting member 113a4 and the side of the middle part 113b. Of course, based on the relatively arranged first position adjusting member 113a4, the relative position can be accurately positioned under the support of the first adjusting connector 113a3.

[0060] It should be noted that the first adjusting connector 113a3 can also be installed at the end of the middle part 113b, thereby aligning the first position adjusting member 113a4 with the end of the first platform plate 113a1 to achieve the same position adjustment.

[0061] In this embodiment, the second platform portion 133c includes: a second platform plate 113c1, a second sliding boss 113c2 provided on one side of the second platform plate 113c1 in the thickness direction, second adjusting connecting seats 113c3 respectively provided in the second direction of the second platform plate 113c1, and a second position adjusting member 113c4 threadedly connected to the second adjusting connecting seats 113c3; wherein, the second platform plate 113c1 is a rectangular plate, and its shape is consistent with the shape of the first platform plate 113a1. Furthermore, to ensure its overall structural strength, the thickness of the second platform plate 113c1 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 113, the flatness, parallelism, etc. of the two sides of the second platform plate 113c1 in the thickness direction need to be set respectively. Furthermore, the second direction is perpendicular to the first direction, thereby achieving position adjustment in both directions.

[0062] In this embodiment, the second sliding boss 113c2 extends along the second direction of the second platform plate 113c1. Therefore, the position of the second platform plate 113c1 relative to the middle portion 113b can be adjusted based on the sliding engagement between the second sliding boss 113c2 and the middle portion 113b. Furthermore, the cross-sectional shape of the second sliding boss 113c2 is an isosceles trapezoid. The narrower upper surface of the second sliding boss 113c2 is fixedly connected to the upper side of the second platform plate 113c1. This allows for convenient sliding engagement between the second sliding boss 113c2 and the middle portion 113b while effectively restricting their degrees of freedom in the non-sliding direction.

[0063] Furthermore, the position of the second platform portion 133c is adjusted and restricted through the provided second adjustment connector 113c3 and second position adjustment member 113c4. In this embodiment, the second adjustment connector 113c3 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 113c3 is provided at the end of the second platform portion 133c in the second direction, so that the second adjustment connector 113c3 can be fixedly installed at the end of the second platform plate 113c1 based on the threaded connector. In addition, the second position adjustment member 113c4 is achieved through... The connecting threaded hole of the second adjusting connector 113c3 is used to achieve mutual engagement. The connecting threaded hole of the second adjusting connector 113c3 is opposite to the middle part 113b. Therefore, by rotating the second position adjusting member 113c4, the position between the second platform part 133c and the middle part 113b can be accurately adjusted based on the abutment between the end of the second position adjusting member 113c4 and the side of the middle part 113b. Of course, based on the relatively set second position adjusting member 113c4, the relative position can be accurately positioned under the support of the second adjusting connector 113c3.

[0064] It should be noted that the second adjusting connector 113c3 can also be installed at the end of the middle part 113b, thereby aligning the second position adjusting member 113c4 with the end of the second platform plate 113c1 to achieve the same position adjustment.

[0065] In this embodiment, the middle part 113b is generally rectangular, and its shape is consistent with the first platform plate 113a1, thereby achieving consistency in the shape of the first two-dimensional adjustment platform 113.

[0066] In this embodiment, a scale for marking position adjustment can be provided on at least one of the first platform portion 113a, the intermediate portion 113b, and the second platform portion 133c, thereby achieving accurate calibration of the position adjustment.

[0067] Combination Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the rubber head mounting base 114 adopts a plate-like structure as a whole, and it is connected to the first two-dimensional adjustment platform 113 by means of detachable connection; furthermore, in order to facilitate the installation of the rubber head 11a, the rubber head 11a and the rubber head mounting base 114 can be connected by a quick-release method.

[0068] Combination Figure 1 , Figure 2 and Figure 5 As shown, according to one embodiment of the present invention, the rubber head unit 1 further includes: a first rotating support 12; wherein, the first rotating support 12 includes: a first rotating drive 121 and a rotating bearing structure 122 connected to the rotating shaft of the first rotating drive 121; further, the rubber head assembly 11 is connected to the rotating bearing structure 122, thereby, the switching of the rubber head assembly 11 installed on the rotating bearing structure 122 can be realized based on the operation of the first rotating drive 121; furthermore, in this embodiment, multiple rubber head assembly mounting positions can be provided on the rotating bearing structure 122 to facilitate the installation of multiple rubber head assemblies 11.

[0069] In this embodiment, the rotating bearing structure 122 includes a cylindrical support 122a and a bottom connector 122b; wherein the bottom connector 122b is generally a plate-shaped structure and is installed on the rotating shaft of the first rotating drive 121 using a threaded connection. Further, four rubber head assembly mounting positions are evenly spaced along the circumference of the cylindrical support 122a. To facilitate the installation of the rubber head assembly 11, a radially outward protrusion can be provided on the outer surface of the cylindrical support 122a, and the side of the protrusion away from the cylindrical support 122a is machined to form a rubber head assembly mounting position for installing the rubber head assembly 11. 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 122a.

[0070] In this embodiment, multiple mounting holes can be regularly provided on the rubber head assembly mounting position, so that the rubber head assembly 11 can be pressed against the rubber head assembly mounting position using a threaded connector.

[0071] Combination Figure 2 and Figure 6As shown, according to one embodiment of the present invention, an abutment protrusion 122a1 is provided on the outer side of the cylindrical support 122a and adjacent to the mounting position of the rubber head assembly. Correspondingly, a correction protrusion 112a is provided on the side of the first linear moving mechanism 112 opposite to the abutment protrusion 122a1. The abutment protrusion 122a1 and the correction protrusion 112a are arranged vertically (i.e., the abutment protrusion 122a1 is above the correction protrusion 112a, or the abutment protrusion 122a1 is below the correction protrusion 112a). Furthermore, threaded holes can be provided on the abutment protrusion 122a1 or the correction protrusion 112a, and a correction bolt a can be installed corresponding to the threaded hole. By abutting the correction bolt a against another protrusion, the vertical orientation of the first linear moving mechanism 112 can be precisely adjusted, which greatly ensures the verticality of the workpiece imprinting direction and is more beneficial to improving the pressure control accuracy of the present invention.

[0072] Combination Figure 1 , Figure 2 and Figure 5 As shown, according to one embodiment of the present invention, when a plurality of glue head assemblies 11 are provided on the glue head unit 1, a fixed connecting plate 1a can be further provided between adjacent glue head assemblies 11. The fixed connecting plate 1a is used to connect the first driver 111 in the adjacent glue head assemblies 11. This further effectively ensures the installation reliability of the glue head assemblies 11, thereby ensuring stable operation during the printing process. In this embodiment, the fixed connecting plate 1a can be made of metal, and a plurality of regular ventilation holes are provided on the fixed connecting plate 1a. This further enables the heat generated by the first driver 111 to be conducted outwards and dissipated through the function of the fixed connecting plate 1a.

[0073] Combination Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, according to one embodiment of the present invention, the workpiece carrying unit 2 further includes: a second rotating support 22 and a fixture carrying plate 23 connected to the rotating shaft of the second rotating support 22; wherein, the fixture carrying plate 23 is provided with a fixture mounting position 231 for mounting the workpiece fixture 21; in this embodiment, the workpiece fixture 21 is detachably mounted from the fixture carrying plate 23 based on the fixture mounting position 231. In this embodiment, a vacuum pipeline for connecting to an external vacuum source is arranged at the middle position of the fixture carrying plate 23, and the interface on the vacuum pipeline is used to connect to other external structures.

[0074] In this embodiment, the fixture support plate 23 is a plate with a regular shape, such as a disc. Therefore, multiple fixture mounting positions 231 can be regularly arranged on the fixture support plate 23. In this embodiment, to facilitate the detachment of the workpiece fixture 21 from the fixture mounting position 231, the workpiece fixture 21 can be mounted in the fixture mounting position 231 using magnetic attraction and / or vacuum adsorption. Furthermore, by overcoming the magnetic attraction and / or vacuum adsorption force between the workpiece fixture 21 and the fixture mounting position 231, the workpiece fixture 21 can be detached and lifted. In addition, by providing fixture mounting positions 231 and connecting the workpiece fixture 21 to the fixture mounting positions 231 using magnetic attraction and / or vacuum adsorption, precise positioning of the workpiece fixture 21's mounting position and angle can be achieved, which is more beneficial for ensuring accurate imprinting of this invention.

[0075] like Figure 8 As shown, according to one embodiment of this utility model, the fixture mounting position 231 has a groove structure, and the bottom of the fixture mounting position 231 is provided with a first channel 2311 for the support member 3a to pass through. The fixture mounting position 231 can be directly formed on the fixture support plate 23 by machining; alternatively, it can be formed by combining different components. For details, see [link to relevant documentation]. Figure 9 As shown, a through hole matching the shape of the workpiece fixture 21 is machined on the fixture support plate 23, and the fixture mounting position 231 is formed by further installing a fixture support plate 231a at the bottom of the fixture support plate 23. In this embodiment, the fixture support plate 231a can be connected to the fixture support plate 23 using a threaded connector, wherein the first channel 2311 is set on the fixture support plate 231a. By setting the fixture mounting position 231 in a combined manner, the installation position of the fixture support plate 231a can be flexibly and finely adjusted, thereby ensuring that the position of the first channel 2311 in the fixture mounting position 231 is more accurate, and can further accurately match the lifting support unit 3, which is more beneficial to improving the pressure control accuracy of this invention in the imprinting process.

[0076] Combination Figure 1 and Figure 9 As shown, according to one embodiment of the present invention, the workpiece fixture 21 includes: an annular fixture body 211; wherein, the upper side of the fixture body 211 serves as a support surface for the workpiece. In this embodiment, an adsorption groove 211a for adsorbing the workpiece is provided on the support surface; a vacuum channel 211b is provided inside the fixture body 211, one end of the vacuum channel 211b is connected to the adsorption groove 211a, and the other end of the vacuum channel 211b forms a connecting opening 211c on the circumferential side of the fixture body 211.

[0077] In this embodiment, the adsorption groove 211a can be set as an annular groove. Since the adsorption groove 211a needs to adsorb the workpiece, the setting area of ​​the adsorption groove 211a should be smaller than the surface area of ​​the workpiece. After the workpiece is placed on the upper side of the adsorption groove 211a, the adsorption and positioning of the workpiece can be achieved through the vacuum pipeline connected to the connecting opening 211c, so as to ensure the reliable installation of the workpiece.

[0078] In this embodiment, the vacuum channel 211b includes a vertical channel portion and a horizontal channel portion. One end of the vertical channel portion is connected to the adsorption groove 211a, and the other end is connected to the horizontal channel portion. The other end of the horizontal channel portion extends through the circumferential side of the fixture body 211, thereby forming a corresponding connection opening 211c. To facilitate connection with the vacuum pipeline, a corresponding connector can be installed on the connection opening 211c. Correspondingly, since the connector installed on the connection opening 211c is protruding, a clearance groove needs to be provided at the corresponding position of the fixture mounting position 231 to avoid interference with the connector.

[0079] In this embodiment, the opening area of ​​the end of the vertical channel portion of the vacuum channel 211b that connects to the adsorption groove 211a is smaller than the opening width of the adsorption groove 211a, or it can be larger than the opening width of the adsorption groove 211a. Therefore, by flexibly setting the opening size of the end of the vertical channel portion that connects to the adsorption groove 211a, the adsorption response and adsorption reliability can be easily adjusted, which is more beneficial to ensuring the imprinting effect of this utility model.

[0080] Combination Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, according to one embodiment of the present invention, the lifting support unit 3 is disposed below the rubber head assembly 11. The lifting support unit 3 further includes a second driver 31, a second linear movement mechanism 32, and a support mounting base 33. Specifically, the second driver 31, the second linear movement mechanism 32, and the support mounting base 33 are connected sequentially from bottom to top, and each component is installed using threaded connections. Thus, the second linear movement mechanism 32 controls the support mounting base 33 to reciprocate vertically under the action of the second driver 31. In this embodiment, the second driver 31 can be an electric mechanism (such as a servo motor, stepper motor, etc.) to precisely output the required displacement. Further, the second linear movement mechanism 32 is configured as a mechanical transmission structure that converts the rotation of the second driver 31 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 31 into a linear extension / retraction action, thereby precisely achieving the abutment of the support 3a against the lower side of the workpiece fixture 21, and causing the workpiece fixture 21 to be lifted to a preset height.

[0081] In this embodiment, the support mounting base 33 is configured as a regular plate, and the support mounting base 33 is connected to the telescopic end of the second linear moving mechanism 32 using a threaded connector. Furthermore, the upper side of the support mounting base 33 is provided with a fitting protrusion 331.

[0082] Further, see Figure 9 As shown, the support member 3a includes a first part 3a1 and a second part 3a2 arranged sequentially from top to bottom. The outer dimensions of the second part 3a2 are larger than those of the first part 3a1, thus giving the support member 3a an overall stepped structure. In this embodiment, a fitting groove 3a21 is provided on the lower side of the second part 3a2, and this fitting groove 3a21 is matched with a fitting protrusion 331 to achieve positioning and installation of the support member 3a and the support member mounting base 33. In this embodiment, the depth of the fitting groove 3a21 is less than the protrusion height of the fitting protrusion 331, which effectively avoids interference between the second part 3a2 and the support member mounting base 33, thus contributing to ensuring the installation accuracy of the support member 3a.

[0083] Furthermore, the cross-sectional shape of the first part 3a1 is matched with the cross-sectional shape of the first channel 2311, thereby realizing the positioning and guiding sliding between the first part 3a1 and the first channel 2311, which is more beneficial to ensuring the support accuracy and stability of the support member 3a on the workpiece fixture 21.

[0084] Furthermore, the pressure sensor 3b is installed on the upper side of the first part 3a1. When the first part 3a1 passes through the first channel 2311 and abuts against the workpiece fixture 21, the pressure sensor 3b needs to contact the workpiece at the position in the hollow part of the workpiece fixture 21. Furthermore, a vertical support structure can be provided on the upper side of the first part 3a1, and the pressure sensor 3b is installed on the vertical support structure. The height of the vertical support structure is set based on the thickness of the workpiece fixture 21 to ensure sufficient contact between the pressure sensor 3b and the workpiece.

[0085] In another embodiment, the vertical support structure can be further configured as a telescopic linear structure (e.g., a lead screw). A through hole with a transmission thread is provided on the support member 3a to achieve matching rotation with the linear structure. Thus, by driving the linear structure to rotate relative to the support member 3a, the height of the vertical support structure can be flexibly and precisely adjusted. In this case, the pressure sensor 3b installed at the upper end of the vertical support structure can accurately contact the workpiece, ensuring reliable contact while effectively avoiding abnormal pressure values ​​caused by excessive contact between the pressure sensor 3b and the workpiece. This is more beneficial for ensuring the control accuracy of this invention. In this embodiment, to facilitate automatic driving of the linear structure, a through hole can be further provided on the structure below the support member 3a, extending the linear structure downwards until it reaches a position with sufficient space to install the corresponding electric drive. For example, a large space can be provided at the telescopic end of the second linear moving mechanism 32 to facilitate the installation of the corresponding electric drive.

[0086] To further illustrate this scheme, the imprinting process of this scheme will be further explained in conjunction with the accompanying drawings.

[0087] S1. The workpiece to be imprinted is mounted on the workpiece fixture 21, and the workpiece fixture 21 is mounted on the workpiece carrying unit 2. In this embodiment, the workpiece fixture 21 is connected to a vacuum device through the connecting opening 211c on its circumferential side. Thus, when the workpiece to be imprinted is placed at the corresponding position on the workpiece fixture 21, it can be vacuum-adsorbed to achieve accurate positioning of the workpiece. Furthermore, to ensure the positional accuracy of the workpiece to be imprinted on the workpiece carrying unit 2, the position of the workpiece fixture 21 can be precisely adjusted while the workpiece to be imprinted is being adsorbed, so as to ensure that the workpiece carrying unit 2 can transfer the workpiece to be imprinted to the accurate position.

[0088] S2. The workpiece carrying unit 2 transfers the workpiece to be imprinted to a position directly above the lifting support unit 3;

[0089] S3. Install a preset glue head 11a on the corresponding glue head assembly 11 of the glue head unit 1, and control the glue head 11a to move above the workpiece to be imprinted;

[0090] S4. The lifting support unit 3 drives the support member 3a to lift the workpiece fixture 21 so that the workpiece fixture 21 is separated from the workpiece bearing unit 2, and the pressure sensor 3b provided on the lifting support unit 3 comes into contact with the workpiece to be imprinted; In this embodiment, the support member 3a on the lifting support unit 3 is controlled to move upward until the first part 3a1 of the support member 3a passes through the first channel 2311 and comes into contact with the bottom of the workpiece fixture 21. At this time, the pressure sensor 3b also comes into contact with the workpiece to be imprinted.

[0091] Furthermore, if the lifting support unit 3 continues to lift, it can overcome the magnetic attraction and / or vacuum attraction between the workpiece fixture 21 and the workpiece bearing unit 2, so that the workpiece fixture 21 can be separated from the workpiece bearing unit 2.

[0092] S5. The initial value of the pressure sensor 3b is reset to zero, and the glue head unit 1 drives the glue head 11a to press the workpiece to be pressed; wherein, based on the pressure value output by the pressure sensor 3b, the pressure of the glue head unit 1 driving the glue head 11a to press the workpiece to be pressed is controlled until the preset pressure is reached to complete the pressing of the workpiece to be pressed.

[0093] In this embodiment, after the imprinting of the workpiece to be imprinted is completed, the lifting support unit 3 retracts to the initial position, so that the workpiece fixture 21 returns to the corresponding position of the workpiece carrying unit 2. Then, the workpiece carrying unit 2 transfers the imprinted workpiece fixture 21 to the next process and transfers the new workpiece to be imprinted between the current rubber head assembly 11 and the lifting support unit 3, so as to repeat the aforementioned steps.

[0094] In this embodiment, the above-mentioned imprinting process can be implemented based on a PLC, and will not be described in detail here.

[0095] The above content is merely an example of a specific solution of this utility model. For the equipment and structures not described in detail, it should be understood that they are implemented using common equipment and methods already available in the field.

[0096] The above description is merely one solution of this utility model and is not intended to limit it. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. Pad printer head assembly with pressure control, characterized in that include: The rubber head unit (1), the workpiece bearing unit (2), and the lifting support unit (3) are all included. The rubber head unit (1), the workpiece bearing unit (2), and the lifting support unit (3) are arranged at intervals from top to bottom; The rubber head unit (1) is provided with at least one rubber head assembly (11); The workpiece carrying unit (2) is provided with at least one workpiece fixture (21) for carrying the workpiece. The lifting support unit (3) is provided with a support member (3a) for abutting against the workpiece fixture (21) and a pressure sensor (3b) for contacting the workpiece on the workpiece fixture (21). The lifting support unit (3) lifts the workpiece fixture (21) based on the support member (3a) so that the workpiece fixture (21) is separated from the workpiece bearing unit (2), and the pressure sensor (3b) is in contact with the workpiece; The rubber head assembly (11) presses the workpiece based on its set rubber head (11a) and controls the pressure of the rubber head (11a) based on the pressure value fed back by the pressure sensor (3b).

2. The pad printing machine with pressure control device according to claim 1, characterized in that, The rubber head assembly (11) further includes: a first driver (111), a first linear movement mechanism (112), a first two-dimensional adjustment platform (113), and a rubber head mounting base (114). The first driver (111), the first linear movement mechanism (112), the first two-dimensional adjustment platform (113), and the rubber head mounting base (114) are connected in sequence; The first linear movement mechanism (112) controls the first two-dimensional adjustment platform (113) and the rubber head mounting base (114) to reciprocate in the vertical direction under the action of the first driver (111).

3. The pad printing machine with pressure control device according to claim 2, characterized in that, The rubber head unit (1) further includes: a first rotating support (12); The first rotating support (12) includes: a first rotating drive (121) and a rotating bearing structure (122) connected to the rotating shaft of the first rotating drive (121). The rubber head assembly (11) is connected to the rotating bearing structure (122).

4. The pad printing machine with pressure control device according to claim 3, characterized in that, The workpiece carrying unit (2) further includes: a second rotating support (22) and a fixture carrying plate (23) connected to the rotating shaft of the second rotating support (22). The fixture carrier plate (23) is provided with a fixture mounting position (231) for mounting the workpiece fixture (21). The workpiece fixture (21) is designed to be separable from the fixture mounting position (231) and the fixture support plate (23).

5. The pad printing machine with pressure control device according to claim 4, characterized in that, The workpiece fixture (21) is connected to the fixture carrier plate (23) by magnetic attraction and / or vacuum adsorption.

6. The pad printing machine with pressure control device according to claim 5, characterized in that, The fixture mounting position (231) is a groove structure, and the bottom of the fixture mounting position (231) is provided with a first channel (2311) for the support member (3a) to pass through.

7. The pad printing machine with pressure control device according to claim 6, characterized in that, The bottom of the fixture mounting position (231) is based on a detachable fixture support plate (231a).

8. The pad printing machine with pressure control device according to claim 7, characterized in that, The workpiece fixture (21) includes: an annular fixture body (211); The upper side of the fixture body (211) serves as the support surface for the workpiece; An adsorption groove (211a) for adsorbing the workpiece is provided on the bearing support surface. A vacuum channel (211b) is provided inside the fixture body (211). One end of the vacuum channel (211b) is connected to the adsorption groove (211a), and the other end of the vacuum channel (211b) forms a connection opening (211c) on the circumferential side of the fixture body (211).

9. The pad printing machine with pressure control device according to claim 8, characterized in that, The lifting support unit (3) further includes: a second driver (31), a second linear movement mechanism (32), and a support mounting base (33). The second driver (31), the second linear movement mechanism (32), and the support mounting base (33) are connected sequentially from bottom to top; The second linear movement mechanism (32) controls the support mounting base (33) to reciprocate in the vertical direction under the action of the second driver (31); The support member (3a) is detachably connected to the support member mounting base (33).

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