Pad printer

Abstract

The application discloses a pad printing machine, which comprises a feeding channel, a pushing assembly, a blocking assembly and a material moving assembly. The pushing assembly comprises a pushing plate and a first driving unit for driving the pushing plate to push materials. The blocking assembly is arranged opposite to the pushing assembly and comprises a blocking plate and a multi-stroke mechanism. The blocking plate is connected with the multi-stroke mechanism and can be matched with the pushing plate to clamp materials in the feeding channel. The blocking plate has a blocking station, a discharging station and a material separating station. The multi-stroke mechanism can drive the blocking plate to move from the discharging station to the material separating station and drive the blocking plate to move from the material separating station to the blocking station. The material moving assembly is used for receiving the materials clamped by the pushing plate and the blocking plate and moving the materials to a pad printing station. The material moving assembly comprises a negative pressure adsorption unit and a second driving unit for driving the negative pressure adsorption unit to reciprocate. The pad printing machine has the advantages of accurate feeding and pushing, no tooth punching phenomenon and good pad printing quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pad printing machines, in particular to a pad printing machine. BACKGROUND

[0002] The pad printing machine is a device for printing a printing pattern on a small-sized object through a concave rubber head. For example, the silver paste is printed on the surface of an inductor by using the pad printing machine to form a conductive electrode. The process of the pad printing machine generally includes feeding, moving, printing, drying, and collecting. After the material is fed from the vibrating disc into the feeding channel, the material in the feeding channel needs to be moved to the printing station.

[0003] Referring to Chinese Patent Document CN 112829450A, a full-automatic pad printing machine for magnetic cores is disclosed. When the material in the feeding channel needs to be moved to the printing station, the material blocking drive is used to move the material blocking plate to the buffer station, the magnetic core in the buffer station is positioned, and after the magnetic core in the buffer station is positioned, the material blocking mechanism no longer blocks the movement of the magnetic core along the transportation guide rail. The bottom plate drive is used to move the bottom plate along the transportation direction of the magnetic core, and the material blocking plate drives the magnetic core to move to the printing station. During the positioning of the material, the following defects may exist:

[0004] ① Since the material is moved to the printing station by the material blocking plate pushing the material transversely in the transportation groove, the positioning groove of the material blocking plate needs to be a U-shaped groove. The U-shaped groove is used to clamp the middle column of the magnetic core, which requires that the groove width of the U-shaped groove must be greater than the width of the middle column of the magnetic core (otherwise, the U-shaped groove cannot be clamped into the middle column of the magnetic core, and positioning and material moving cannot be achieved). As a result, the transverse center distance between adjacent magnetic cores is not exactly the same. When the magnetic core is fed to the printing station, the middle column of the magnetic core may interfere with the material fork of the material fork plate. The material fork does not pass through the middle column exactly when it is extended, but hits the middle column, causing the material fork of the material fork plate to be damaged when the material fork is inserted or to have a tooth hitting phenomenon;

[0005] ② The material blocking plate is driven by the material blocking drive (cylinder). When the force applied by the material blocking plate to the material is small, the material may not be accurately positioned. When the force is large, the material will move tightly against the transportation groove wall during the material moving process, which will cause great wear on the surface of the material and also cause the material to be deflected or displaced during the material moving process, thereby affecting the subsequent material forking of the material fork plate and the accurate printing of the printing station.

[0006] ③ The transportation groove of the material must extend from the buffer station to the printing station, which requires a long distance and high straightness of the transportation groove.

[0007] Therefore, it is necessary to improve and optimize the existing pad printing machine. SUMMARY

[0008] The present application aims to at least solve one of the technical problems existing in the prior art, and for this purpose, the present application provides a pad printing machine which can accurately push and move materials and will not cause tooth punching.

[0009] The pad printing machine according to an embodiment of the present application comprises a feeding channel and further comprises:

[0010] A pushing assembly, which comprises a pushing plate and a first driving unit for driving the pushing plate to push materials;

[0011] A blocking assembly, which is arranged opposite to the pushing assembly and comprises a blocking plate and a multi-stroke mechanism, the blocking plate is connected with the multi-stroke mechanism, the blocking plate can cooperate with the pushing plate to clamp materials in the feeding channel, the blocking plate has a blocking station, a discharging station and a material separating station, and the multi-stroke mechanism can drive the blocking plate to move from the discharging station to the material separating station and to move from the material separating station to the blocking station;

[0012] A material moving assembly, which is used for receiving the materials clamped by the pushing plate and the blocking plate and moving the materials to a pad printing station, the material moving assembly comprises a negative pressure adsorption unit and a second driving unit for driving the negative pressure adsorption unit to reciprocate.

[0013] The pad printing machine according to an embodiment of the present application has at least the following beneficial effects: through the cooperation of the pushing assembly and the blocking assembly, the materials are pushed to the material moving assembly, and the materials are moved by the material moving assembly, which discards the way of moving materials to the pad printing station in the horizontal direction by the blocking plate in the traditional technology, in the pushing process, the materials are clamped by the pushing plate and the blocking plate and are pushed to the material moving assembly in the vertical direction, the horizontal center distance between the materials remains unchanged; the materials are adsorbed and fixed by the negative pressure adsorption unit of the material moving assembly, in the process of moving to the pad printing station, the materials do not have the problem of contacting and rubbing with the wall of the conveying groove in the traditional technology, the materials will not be damaged by rubbing, the materials will not rotate or deviate due to rubbing, the center distance between the materials moving to the pad printing station remains unchanged, the materials can be accurately pushed to below the pad printing head by the fork plate in the pad printing station, the tooth punching phenomenon will not occur, the service life of the fork plate and other parts is prolonged, the consistency and accuracy of the printing effect are ensured, and the pad printing quality is greatly improved.

[0014] According to some embodiments of the present application, the multi-stroke mechanism comprises a mounting seat and a slide rod connected to the mounting seat, one end of the slide rod is connected and fixed with the blocking plate, a return spring is arranged between the mounting seat and the blocking plate to push the blocking plate to move from the material separating station to the blocking station, the other end of the slide rod is connected with a third driving unit, and the third driving unit drives the blocking plate to move from the discharging station to the material separating station.

[0015] According to some embodiments of the present application, the third driving unit is a cylinder, the output rod of which is in abutment with the mounting seat after being extended, and the slide rod drives the material blocking plate to move from the material feeding station to the material blocking station; or the third driving unit is a stepping motor or a servo motor.

[0016] According to some embodiments of the present application, the reset spring is sleeved on the slide rod, one end of the reset spring is in abutment with the material blocking plate, and the other end is in abutment with the mounting seat; or a sleeve rod is arranged on the material blocking plate or the mounting seat, and the reset spring is sleeved on the sleeve rod.

[0017] According to some embodiments of the present application, the slide rod is two, and the two slide rods are sleeved with reset springs.

[0018] According to some embodiments of the present application, the multi-stroke mechanism includes two cylinders, including a first cylinder and a second cylinder, the output rod of the first cylinder is connected with the material blocking plate, and the output rod of the second cylinder is connected with the first cylinder; or the multi-stroke mechanism includes a servo motor, the output screw rod of the servo motor is connected with the material blocking plate; or the multi-stroke mechanism includes a stepping motor, the output screw rod of the stepping motor is connected with the material blocking plate.

[0019] According to some embodiments of the present application, the material pushing plate is provided with a positioning groove.

[0020] According to some embodiments of the present application, the positioning groove has at least one inclined positioning groove wall.

[0021] According to some embodiments of the present application, the positioning groove of the material pushing plate is a V-shaped groove, or the positioning groove of the material pushing plate is a trapezoidal groove.

[0022] According to some embodiments of the present application, the groove walls of two adjacent positioning grooves are spaced apart.

[0023] According to some embodiments of the present application, the material blocking plate includes a detachable material blocking block, and the material blocking block is provided with a wear-resistant layer.

[0024] According to some embodiments of the present application, the material blocking block is provided with a clearance inclined surface above the position of the wear-resistant layer to facilitate observation of the material.

[0025] According to some embodiments of the present application, the feeding channel has a feeding bottom plate, the feeding bottom plate is provided with an L-shaped opening, and the material blocking plate is located at the position of the L-shaped opening when the material blocking plate is at the material blocking station.

[0026] According to some embodiments of the present application, the feeding channel has a feeding side plate opposite to the material blocking plate, and a through slot is arranged on the feeding side plate, and the pushing plate extends into the feeding channel through the through slot.

[0027] According to some embodiments of the present application, the first driving unit is a cylinder, or a stepping motor, or a servo motor.

[0028] According to some embodiments of the present application, the first driving unit is connected with the pushing plate through a sliding block, and a sliding rail or a sliding groove is arranged on the sliding block.

[0029] According to some embodiments of the present application, the material moving assembly comprises a variable distance module, and the negative pressure adsorption unit is installed on the variable distance module. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0031] Figure 1 is a structural schematic diagram of a pad printing machine according to an embodiment of the present application (partial schematic diagram, irrelevant structures are not shown, such as a vibrating feeding disc, a pad printing device, a drying device, etc. are not drawn) ;

[0032] Figure 2 is Figure 1 is a structural schematic diagram after the material moving assembly and the feeding channel are hidden;

[0033] Figure 3 is a structural schematic diagram of a pushing assembly according to an embodiment of the present application;

[0034] Figure 4 is Figure 3 is a structural schematic diagram of a pushing plate according to an embodiment of the present application;

[0035] Figure 5 is Figure 4 is a partial enlarged view of B in FIG. 8;

[0036] Figure 6 is a structural schematic diagram of a material blocking assembly according to an embodiment of the present application;

[0037] Figure 7 is Figure 6 is a structural schematic diagram of a material blocking block according to an embodiment of the present application;

[0038] Figure 8 is another structural schematic diagram of a material blocking assembly according to an embodiment of the present application;

[0039] Figure 9 is Figure 8 is another angle schematic diagram of FIG. 8;

[0040] Figure 10 is a structural schematic diagram of a material moving assembly in an embodiment of the present application;

[0041] Figure 11 is a structural schematic diagram of a material feeding channel related in an embodiment of the present application;

[0042] Figure 12 is a structural schematic diagram of a material feeding side plate in an embodiment of the present application;

[0043] Figure 13 is a structural schematic diagram of a material feeding top plate in an embodiment of the present application; Figure 11 is a structural schematic diagram of a material feeding top plate in an embodiment of the present application;

[0044] Figure 14 is a position structural diagram of a material pushing plate in an embodiment of the present application in Figure 13 ;

[0045] Figure 15 is a structural schematic diagram of a CD series inductor in the prior art.

[0046] Reference signs:

[0047] inductor 100, upper cover 101, middle column 102, lower cover 103, hanging wire slot 104;

[0048] material feeding channel 200, material feeding bottom plate 210, material feeding side plate 220, through slot 221;

[0049] material pushing assembly 300, material pushing plate 310, positioning slot 311, oblique positioning slot wall 312, first driving unit 320, first support 330;

[0050] material blocking assembly 400, material blocking plate 410, material blocking block 411, wear-resistant layer 412, accommodation inclined surface 413, multi-stroke mechanism 420, mounting seat 421, sliding rod 422, return spring 423, third driving unit 424, first air cylinder 425, second air cylinder 426, second support 430;

[0051] material moving assembly 500, negative pressure adsorption unit 510, distance changing module 520, distance changing unit 521. DETAILED DESCRIPTION

[0052] Embodiments of the present application are described in detail below, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0053] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, inside, outside, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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, they should not be construed as limiting this invention.

[0054] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0055] In the description of this invention, unless otherwise explicitly defined, terms such as setting, installing, connecting, assembling, and cooperating should be interpreted broadly, and those skilled in the art can reasonably determine the meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0056] The present invention will now be described using CD series inductor products as an example, so that those skilled in the art can easily understand the present invention.

[0057] Taking the CD series inductors as an example, see the appendix. Figure 15 As shown, the inductor 100 includes an upper cover 101, a middle column 102, and a lower cover 103. The upper cover 101, middle column 102, and lower cover 103 form an "I"-shaped structure. The edge of the upper cover 101 is provided with an inwardly recessed wire hanging groove 104. The surface of the upper cover 101 needs to be printed with silver paste to form electrodes. When pad printing the silver paste, it is necessary to ensure that the actual pad printing position is consistent with the design position required for pad printing; otherwise, the pad printing effect cannot be guaranteed, affecting the stability of product quality and even the product yield. It is understood that the pad printing machine described in this invention is not limited to pad printing CD series inductors; it can also be used to pad print other inductor products, such as NR series inductors, and other non-inductor products.

[0058] See Figures 1-6 As shown, this embodiment of the invention provides a pad printing machine, including a feeding channel 200. The feeding channel 200 is used to receive an inductor 100 conveyed by a vibrating feeding tray. The inductor 100 is positioned at a designed angle... Figure 1 and Figure 11 The inductor 100 enters the feeding channel 200 at the position indicated by the middle arrow A. There are multiple inductors 100 in the feeding channel 200, which are arranged in a row horizontally (X direction) and close together, waiting to be transferred to the pad printing station for printing.

[0059] The pushing assembly 300 is mounted on a base (not shown) by a first support 330. The pushing assembly 300 comprises a pushing plate 310 and a first driving unit 320 for driving the pushing plate 310 to push the inductors 100. In this embodiment, the pushing direction (Y direction) of the pushing plate 310 is perpendicular to the arrangement direction (X direction) of the inductors 100 in the feeding channel 200, i.e. the moving direction of the inductors 100 to the pad printing station. The pushing plate 310 does not need to be inserted between the middle columns 102 of the adjacent inductors 100 to push the inductors 100 to move in the X direction. The moving of the inductors 100 in the X direction is completed by the moving assembly 500.

[0060] A material blocking assembly 400 is mounted on a base (not shown) via a second bracket 430. The material blocking assembly 400 and the material pushing assembly 300 are positioned opposite each other, meaning they can cooperate to clamp the inductor 100. In this embodiment, the material pushing assembly 300 is located on one side of the feeding channel 200, and the material blocking assembly 400 is located on the other side. During material pushing, the material pushing plate 310 abuts against one side (Y direction) of the inductor 100, and the material blocking plate 410 abuts against the inductor 100. On the other side of the feed channel 200, the baffle plate 410 cooperates with the pusher plate 310 to clamp the inductor 100, thereby pushing the inductor 100 from the feed channel 200 onto the transfer assembly 500. The baffle assembly 400 includes the baffle plate 410 and a multi-stroke mechanism. The baffle plate 410 is connected to the multi-stroke mechanism 420. Depending on the working position, the baffle plate 410 has a baffle station, a discharge station, and a discharge station. The baffle station means that the baffle plate 410 can block the inductor in the feed channel 200, preventing the inductor 100 from falling out of the feed channel 200. In the unloading station, when the pusher plate 310 extends, it engages with the pusher plate 410 to clamp the inductor 100. The unloading station refers to the position of the baffle plate 410 when the clamped inductor 100 is pushed to a predetermined position on the transfer assembly 500. At the unloading station, the baffle plate 410 does not clamp the inductor 100 and continues to move in the Y direction. The inductor 100 reaches the predetermined position on the transfer assembly 500 at the unloading station and is fixed by the negative pressure adsorption unit 510. The material release station refers to the working position reached after the baffle plate 410 releases its clamping grip on the inductor 100. After the inductor 100 is unloaded onto the transfer assembly 500 at the unloading station, the transfer assembly 500 will move the inductor 100 in the X direction. If the baffle plate 410 is still in contact with the inductor 100 at this time, the inductor 100 will be subjected to the side friction of the baffle plate 410 when moving in the X direction, which may cause the inductor 100 to turn or deviate. Therefore, by setting the material release station, the baffle plate 410 is released from the inductor 100, which facilitates the transfer assembly 500 to transfer the material. Thus, the multi-stroke mechanism 420 has at least two strokes. One stroke is to move the baffle plate 410 from the unloading station to the material release station to realize the release of the baffle plate 410 from the inductor 100. The other stroke is to move the baffle plate 410 from the material release station to the material release station, waiting for the next material release.

[0061] The transfer assembly 500 is used to receive the inductor 100 held by the pusher plate 310 and the baffle plate 410 and transfer the inductor 100 to the pad printing station. See [link to documentation]. Figure 1As shown, relative to the side where the pusher assembly 300 is located, the transfer assembly 500 is located on the other side of the feeding channel 200. The transfer assembly 500 includes a negative pressure adsorption unit 510 and a second drive unit (not shown in the figure) that drives the negative pressure adsorption unit 510 to reciprocate. The negative pressure adsorption unit 510 is used to adsorb and fix the inductor 100, so that the inductor 100 will not fall off during the feeding process and ensure that the position of the inductor does not change or shift. The second drive unit drives the negative pressure adsorption unit 510 to move to the pad printing station. The inductor 100 on the transfer assembly 500 is pushed under the pad printing head and the pad printing is completed. After the inductor 100 is removed from the transfer assembly 500, the transfer assembly 500 will return, waiting for the pusher assembly 300 to push the inductor 100 back onto the transfer assembly 500, and so on.

[0062] Through the cooperation of the pushing assembly 300 and the blocking assembly 400, the material is pushed onto the transferring assembly 500, and the transferring assembly 500 transfers the material. This method abandons the traditional method of transferring material laterally (X-axis) to the pad printing station via a blocking plate. In the pushing process, the material is clamped by the pushing plate 310 and the blocking plate 410 and pushed longitudinally onto the transferring assembly 500, maintaining a consistent lateral center-to-center distance between the inductors 100. The inductors 100 are laterally transferred by the negative pressure adsorption unit 510 of the transferring assembly 500. During the transfer to the pad printing station, there is no contact friction with the transport trough wall as in traditional technologies. This prevents frictional damage to the inductor surface and avoids rotation or misalignment of the inductor due to friction. It ensures that the center-to-center spacing of the inductors transferred to the pad printing station remains consistent. This allows the fork plate to accurately push the inductor under the pad printing head at the pad printing station, preventing the fork plate from failing to insert or the forks from hitting the teeth. This extends the service life of the fork plate and other components, ensures the consistency and accuracy of the printing effect, and greatly improves the quality of pad printing.

[0063] See Figure 6As shown, in some embodiments of the present invention, the multi-stroke mechanism 420 includes a mounting base 421 and a slide rod 422 connected to the mounting base 421. One end of the slide rod 422 is connected and fixed to the baffle plate 410. A return spring 423 is provided between the mounting base 421 and the baffle plate 410 to push the baffle plate 410 from the unloading station to the blocking station. The other end of the slide rod 422 is connected to a third drive unit 424, which pushes the baffle plate 410 from the unloading station to the unloading station. The working process is as follows: Under the reset force of the return spring 423, the baffle plate 410 is always in the baffle position and in contact with the side wall of the inductor 100. When the sensor detects that the inductors in the feeding channel 200 are in place, the first drive unit 320 is activated, driving the pusher plate 310 to extend. The inductor 100 is clamped by the baffle plate 410 and the pusher plate 310. As the pusher plate 310 continues to advance, the return spring 423 is compressed, and the inductor 100 is pushed towards the transfer assembly 500 under clamping. Due to the reset force of the return spring 423, the pusher plate 310 is kept in place. The inductor 100 is always clamped by the baffle plate 410, preventing it from deflecting or shifting. When the inductor 100 enters the transfer assembly 500 and reaches the predetermined position, the baffle plate 410 is in the unloading position, and the pusher plate 310 stops advancing. At this time, the third drive unit 424 activates, moving the baffle plate 410 from the unloading position to the unloading position. The baffle plate 410 releases its contact with the inductor 100, and the inductor 100 is reliably fixed on the transfer assembly 500 under the action of the negative pressure adsorption unit 510, and is then transported to the pad printing position by the transfer assembly 500. After the transfer assembly 500 leaves, the third drive unit 424 releases the force on the baffle plate 410, and the baffle plate 410 moves from the unloading position to the baffle position under the action of the return spring 423, waiting for the next baffle. During this process, the material transfer component 500 completes the feeding and returns to its original position. The pusher plate 310 then performs the next action, cooperating with the baffle plate 410 to clamp and push several inductors 100 on the feeding channel 200 onto the material transfer component 500. This process is repeated, continuously pushing the inductors 100 onto the material transfer component 500 and having them transferred by the material transfer component 500 to the pad printing station, forming a fully automatic material pushing and transferring process, enabling the pad printing machine to work continuously.

[0064] In some embodiments of the present invention, the third drive unit 424 is a cylinder. Cylinders have a simple structure, are easy to procure, are inexpensive, and offer rapid response and easy control. See also Figure 2As shown, after the cylinder output rod 4241 extends, it abuts against the mounting base 421. The output rod 4241 continues to extend, and the slide rod 422 drives the baffle plate 410 to move from the unloading station to the unloading station. The return spring 423 is further compressed. After the material transfer assembly 500 sends away the inductor 100, the output rod 4241 retracts. At this time, the baffle plate 410 moves to the blocking station under the action of the return force of the return spring 423. In some other embodiments of the present invention, the third drive unit 424 is a stepper motor or a servo motor.

[0065] In some embodiments of the present invention, such as Figure 2 As shown, the return spring 423 is sleeved on the slide rod 422. One end of the return spring 423 abuts against the baffle plate 410, and the other end abuts against the mounting base 421. The structure is simple and easy to install. It can be understood that the return spring 423 may not be sleeved on the slide rod 422, as long as the return spring 423 can provide a return force to the baffle plate 410. For example, a separate sleeve can be provided on the baffle plate 410 or the mounting base 421 to sleeve the return spring 423, which can achieve the same effect as the return spring 423 being sleeved on the slide rod 422.

[0066] In some embodiments of the present invention, there are two slide rods 422, and a return spring 423 is sleeved on each of the two slide rods 422, so that the force on the baffle plate 410 is more balanced, the reset response is timely, and the reset stroke is accurate.

[0067] See details Figure 8 , Figure 9As shown, in some embodiments of the present invention, the multi-stroke mechanism 420 includes two cylinders, namely a first cylinder 425 and a second cylinder 426. The output rod of the first cylinder 425 is connected to the baffle plate 410, and the output rod of the second cylinder 426 is connected to the first cylinder 425. The working process is as follows: the baffle plate 410 is in the baffle position under the action of the first cylinder 425. When the sensor detects that the inductors 100 in the feeding channel 200 are in place, the first drive unit 320 is activated, driving the pusher plate 310 to extend. The inductors 100 are clamped by the baffle plate 410 and the pusher plate 310. The pusher plate 310 continues to extend, and the output rod of the first cylinder 425 retracts synchronously. The inductors 100 are clamped and pushed towards the transfer assembly 500. Because the first drive unit 320 and the first cylinder 425 operate synchronously, it ensures that the pusher plate 310 and the baffle plate 410 always clamp the inductor 100, and the inductor 100 will not deflect or shift. When the inductor 100 enters the transfer assembly 500 and reaches the predetermined position, the baffle plate 410 is in the unloading position, and the pusher plate 310 no longer continues to advance. At this time, the second cylinder 426 is activated, driving the first cylinder 425 to retreat in the Y direction. The first cylinder 425 drives the baffle plate 410 to move from the unloading position to the unloading position. The baffle plate 410 releases contact with the inductor 100. Under the action of the negative pressure adsorption unit 510, the inductor 100 is reliably fixed on the transfer assembly 500 and sent to the pad printing position by the transfer assembly 500. After the material transfer assembly 500 leaves, the output shafts of the second cylinder 426 and the first cylinder 425 extend, and the baffle plate 410 moves from the material discharge station to the material blocking station. During this process, the material transfer assembly 500 returns to its original position after completing the feeding, and the pusher plate 310 performs the next round of action, cooperating with the baffle plate 410 to clamp and push several inductors 100 on the feeding channel 200 onto the material transfer assembly 500. This process is repeated, continuously pushing the inductors 100 onto the material transfer assembly 500 and transferring them to the pad printing station, forming a fully automatic pushing and transferring process, enabling the pad printing machine to work continuously.

[0068] It is understood that the multi-stroke mechanism 420 can also have other configurations; in some specific embodiments, the multi-stroke mechanism 420 includes a servo motor, the output screw of which is connected to the baffle plate 410. The servo motor can precisely control multiple strokes, thereby enabling the baffle plate 410 to move from the unloading station to the unloading station, and to move the baffle plate 410 from the unloading station to the blocking station; in other specific embodiments, the multi-stroke mechanism includes a stepper motor, the output screw of which is connected to the baffle plate 410.

[0069] In some embodiments of the present invention, the pusher plate 310 is provided with a positioning groove 311, which positions the central column 102 of the inductor 100, making the center distance between the inductors 100 more accurate during the pushing process. In some specific embodiments, the positioning groove 311 has at least one inclined positioning groove wall 312, where inclined means at a certain angle relative to the Y direction. The inclined positioning groove wall 312 is used to abut against the central column 102 of the inductor 100 during the pushing process. The central column 102 abuts against the inclined positioning groove wall 312 and is limited by the positioning groove 311, making it less likely for the inductor 100 to displace in the X direction during the pushing process, so that the inductor 100 can be pushed onto the transfer assembly 500 more accurately. In some specific embodiments, the positioning groove 311 of the pusher plate 310 is a V-shaped groove or a trapezoidal groove. The V-shaped groove or trapezoidal groove can better cooperate with the central column 102 of the inductor 100 to achieve accurate positioning. It is understandable that the positioning slot 311 is not necessary. Since the inductor 100 is held by both sides of the pusher plate 310 and the baffle plate 410, the inductor 100 will not deflect or shift during the pushing process.

[0070] See Figure 4 and Figure 5 As shown, in some embodiments of the present invention, the walls of two adjacent positioning slots 311 are spaced apart. If the walls of two adjacent positioning slots 311 are in contact or close together, the opening of the positioning slot 311 will become wider, requiring the first driving unit 320 to have a longer stroke so that the positioning slot 311 can abut against the central post 102 of the inductor 100 and be positioned. Therefore, the spaced distance between the walls of two adjacent positioning slots 311 can reduce the opening width of the positioning slot 311, thereby shortening the stroke of the first driving unit 320.

[0071] See Figure 6 and Figure 7 As shown, in some embodiments of the present invention, the baffle plate 410 includes a detachable baffle block 411, and the baffle block 411 is provided with a wear-resistant layer 412. When the material is blocked, the pusher plate 310 moves, and the inductor 100 has an impact force on the baffle plate 410. The wear-resistant layer 412 helps to improve the strength of the clamping position and increase the service life. The baffle block 411 is connected and installed on the baffle plate 410. As a consumable, the baffle block 411 can be easily disassembled and replaced without disassembling and replacing the baffle plate 410 as well.

[0072] In some embodiments of the present invention, the baffle block 411 is provided with a clearance slope 413 above the wear-resistant layer 412 to facilitate observation of the material, such as to observe whether there is a shortage of material, so that the operator can keep track of the position of the inductor 100 in the feeding channel 200 at any time.

[0073] In some embodiments of the present invention, the feeding channel 200 has a feeding base plate 210 with an L-shaped opening. The baffle plate 410 is located at the L-shaped opening when it is in the baffle position. The structure is compact and can easily realize the baffle plate 410 to block the inductor 100 in the feeding channel 200. It is understood that the feeding base plate 210 can also be other structures.

[0074] In some embodiments of the present invention, the feeding channel 200 has a feeding side plate 220, which is disposed opposite to the baffle plate 410, and is used to block the two sides of the inductor 100 in the Y direction. The feeding side plate 220 is provided with a through groove 221, and the pusher plate 310 extends into the feeding channel 200 after passing through the through groove 221. The structure is compact and easy to install. It is understood that the feeding side plate can also be divided into two parts to form two side plates, with a gap between the upper and lower parts of the two side plates to allow the pusher plate 310 to pass, or other structures not mentioned herein. The feeding channel 200 also includes a feeding top plate 230, etc.

[0075] In some embodiments of the present invention, the first drive unit 320 is a cylinder; in other embodiments, the first drive unit 320 is a stepper motor or a servo motor. To make the pushing action of the pusher plate 310 smoother, in some specific embodiments, the first drive unit 320 is connected to the pusher plate 310 via a slider, the slider being provided with a slide rail or a slide groove.

[0076] Because multiple products are printed simultaneously during pad printing, multiple pad printing heads are used. These heads have a certain spacing. If inductors are too close together during printing, printing cannot be completed. Before being fed into the pad printing device, the center-to-center distance between adjacent inductors must meet design requirements to ensure that the inductors correspond to the pad printing heads. See also... Figure 1 and Figure 10As shown, in some embodiments of the present invention, the transfer assembly 500 includes a pitch-changing module 520, which has multiple pitch-changing units 521. A negative pressure adsorption unit 510 is mounted on the pitch-changing unit 521. After receiving the inductor 100, the pitch-changing module 520 activates to change the pitch, allowing the inductor 100 to change pitch during the feeding process. The pitch-changing module 520 can very precisely control the center distance between the inductors 100. After the inductors 100 reach the transfer printing station, there is no need for further material separation, i.e., no need to adjust the center distance between the inductors. This prevents the fork from becoming unresponsive. This invention eliminates the problems of insertion or toothing, and completely avoids the use of long and short forks in existing pad printing machines. Existing pad printing machines require material distribution via long and short forks, and the positioning grooves of these forks, like those on traditional baffle plates, have a width greater than the radial width of the inductor's central column 102. This makes it impossible to ensure a perfectly consistent center distance between adjacent inductors during material distribution. This invention, by creatively using a variable-pitch module on the pad printing machine, completely solves these defects caused by long and short fork material distribution, resulting in higher work efficiency, more precise center distance between adjacent inductors, and more reliable and stable printing quality. It is understandable that when the variable-pitch module 520 is not used, after the inductor 100 is transferred to the pad printing station through the cooperation of the pusher assembly 300, the baffle assembly 400, and the transfer assembly 500, traditional long and short forks can be used for material distribution. The specific structure of the variable-pitch module is existing technology and will not be elaborated here.

[0077] In this embodiment of the invention, the material is pushed onto the transfer component 500 by the cooperation of the pushing component 300 and the blocking component 400, and the material is transferred by the transfer component 500. This method abandons the traditional method of transferring material laterally to the pad printing station by a blocking plate. In the pushing process, the material is clamped by the pushing plate 310 and the blocking plate 410 and pushed longitudinally onto the transfer component 500, and the lateral center distance between the materials remains consistent. The negative pressure adsorption unit 510 of the transfer component 500 adsorbs and fixes the material, and the material is transferred... During the process of conveying the material to the pad printing station, there is no contact or friction with the transport trough wall as in traditional technologies. This prevents frictional damage to the material surface and avoids rotation or displacement of the material due to friction. It ensures that the center-to-center spacing of the material conveyed to the pad printing station remains consistent, allowing the fork plate to accurately push the material to the pad printing station without the forks failing to insert or the teeth snapping. This extends the service life of the fork plate and other components, ensures the consistency and accuracy of the printing effect, and greatly improves the quality of pad printing.

[0078] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A pad printing machine, comprising a feeding channel, characterized in that: Also includes: A feeding assembly, comprising a feeding plate and a first driving unit for driving the feeding plate to feed materials; A material blocking assembly is disposed opposite to the material pushing assembly. The material blocking assembly includes a material blocking plate and a multi-stroke mechanism. The material blocking plate is connected to the multi-stroke mechanism. The material blocking plate can cooperate with the material pushing plate to clamp the material in the feeding channel. The material blocking plate has a material blocking station, a material unloading station, and a material discharge station. The multi-stroke mechanism can drive the material blocking plate from the material unloading station to the material discharge station, and drive the material blocking plate from the material discharge station to the material blocking station. The material transfer assembly is used to receive the material held by the pusher plate and the baffle plate and transfer the material to the pad printing station. The material transfer assembly includes a negative pressure adsorption unit and a second drive unit that drives the negative pressure adsorption unit to reciprocate. When the baffle is in the baffle position, the baffle can block the material in the feeding channel and can cooperate with the pusher plate to clamp the material in the feeding channel. When the baffle is in the unloading station, the clamped material can be moved to the transfer component and fixed by the negative pressure adsorption unit; When the baffle is in the material discharge position, the baffle can detach from contact with the material; The pusher plate is provided with a positioning groove; The feeding channel has a feeding base plate with an L-shaped opening, and the baffle plate is located at the L-shaped opening when the material is stopped.

2. The pad printing machine according to claim 1, characterized in that: The multi-stroke mechanism includes a mounting base and a slide rod connected to the mounting base. One end of the slide rod is connected and fixed to the baffle plate. A return spring is provided between the mounting base and the baffle plate to push the baffle plate from the material discharge station to the material blocking station. The other end of the slide rod is connected to a third drive unit, which drives the baffle plate from the material unloading station to the material discharge station.

3. A pad printing machine according to claim 2, characterized in that: The third drive unit is a cylinder. After the cylinder's output rod extends, it abuts against the mounting base and drives the baffle plate from the unloading station to the unloading station via a sliding rod; or the third drive unit is a stepper motor or a servo motor.

4. A pad printing machine according to claim 2 or 3, characterized in that: The return spring is sleeved on the slide rod, with one end of the return spring abutting against the baffle plate and the other end abutting against the mounting base; or the baffle plate or mounting base is provided with a sleeve rod, and the return spring is sleeved on the sleeve rod.

5. A pad printing machine according to claim 4, characterized in that: The slide rod consists of two rods, each fitted with a return spring.

6. A pad printing machine according to claim 1, characterized in that: The multi-stroke mechanism includes two cylinders, namely a first cylinder and a second cylinder, wherein the output rod of the first cylinder is connected to the baffle plate, and the output rod of the second cylinder is connected to the first cylinder; or the multi-stroke mechanism includes a servo motor, wherein the output lead screw of the servo motor is connected to the baffle plate; or the multi-stroke mechanism includes a stepper motor, wherein the output lead screw of the stepper motor is connected to the baffle plate.

7. A pad printing machine according to claim 1, characterized in that: The positioning groove has at least one inclined positioning groove wall.

8. A pad printing machine according to claim 7, characterized in that: The positioning groove of the pusher plate is a V-shaped groove, or the positioning groove of the pusher plate is a trapezoidal groove.

9. A pad printing machine according to claim 8, characterized in that: The walls of two adjacent positioning slots are spaced apart.

10. A pad printing machine according to claim 1, characterized in that: The baffle plate includes a detachable baffle block, and the baffle block is provided with a wear-resistant layer.

11. A pad printing machine according to claim 10, characterized in that: The baffle block has a clearance slope above the wear-resistant layer to facilitate observation of the material.

12. A pad printing machine according to claim 1, characterized in that: The feeding channel has a feeding side plate, which is arranged opposite to the baffle plate. The feeding side plate is provided with a through groove, and the pusher plate extends into the feeding channel after passing through the through groove.

13. A pad printing machine according to claim 1, characterized in that: The first drive unit is a cylinder, a stepper motor, or a servo motor.

14. A pad printing machine according to claim 1 or 13, characterized in that: The first driving unit is connected to the pusher plate via a slider, and the slider is provided with a slide rail or a slide groove.

15. A pad printing machine according to claim 1, characterized in that: The material transfer assembly includes a variable-pitch module, which has multiple variable-pitch units, and the negative pressure adsorption unit is mounted on the variable-pitch unit.

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