CN114750506A - Pad printing machine - Google Patents

Abstract

The invention discloses a pad printing machine, which comprises a feeding channel; the pushing assembly comprises a pushing plate and a first driving unit for driving the pushing plate to push materials; the multi-stroke mechanism can drive the striker plate to move from the blanking station to the material separating station and drive the striker plate to move from the material separating station to the material stopping station; and the material transferring assembly is used for receiving materials clamped by the material pushing plate and the material blocking plate and transferring the materials to a transfer printing station, and comprises a negative pressure adsorption unit and a second driving unit for driving the negative pressure adsorption unit to reciprocate. The material pushing and feeding are accurate, the tooth punching phenomenon can not occur, and the transfer printing quality is good.

Description

Pad printing machine

Technical Field

The invention relates to the field of pad printing machines, in particular to a pad printing machine.

Background

The pad printing machine is a device for printing a printing pattern on a small-size object through a concave offset head, taking an inductance product as an example, silver paste is pad printed on the surface of an inductance by the pad printing machine to form a conductive electrode, the procedures of the pad printing machine generally comprise the procedures of feeding, transferring, pad printing, drying, receiving and the like, and when a material enters a feeding channel from a vibration disc, the material in the feeding channel needs to be transferred to a pad printing station.

Referring to chinese patent document CN112829450A, a full-automatic pad printing machine for magnetic cores is disclosed, in which when a material in a feeding channel needs to be transferred to a pad printing station, a material blocking driver drives a material blocking plate to move to a buffer station, and positions a magnetic core of the buffer station, after the magnetic core of the buffer station is positioned, the material blocking mechanism no longer blocks the magnetic core from moving along a transportation guide rail, a bottom plate driver drives a bottom plate to move along a transportation direction of the magnetic core, and the material blocking plate drives the magnetic core to move to the pad printing station; during the process of positioning and transferring materials, the following defects can exist:

firstly, the material moving is to transversely push the material to move to a pad printing station in a transportation groove through a material baffle, so that a U-shaped groove is required to be adopted for a positioning groove of the material baffle, the U-shaped groove is used for clamping a center column of a magnetic core, the groove width of the U-shaped groove is required to be larger than the width of the center column of the magnetic core (otherwise, the U-shaped groove cannot be clamped into the center column of the magnetic core, and the positioning and the material moving cannot be realized), the transverse center distance between adjacent magnetic cores is not completely the same, when the magnetic core is sent to the pad printing station, the center column of the magnetic core possibly interferes with a material fork of a fork plate, when the material fork extends out, the material fork does not just pass through the center columns, but is hit on the center columns, the material fork cannot be inserted or tooth punching phenomenon occurs during material distribution, and the material fork on the fork plate is damaged;

secondly, the material blocking plate is driven by a material blocking driver (air cylinder), and when the force applied to the material by the material blocking plate is small, the material can be positioned inaccurately; when the force is applied greatly, the material can tightly cling to the wall of the conveying groove to move in the material moving process, so that the surface of the material is greatly abraded, and the material can deflect or shift in the material moving process, so that the material distribution of a subsequent fork material plate and the accurate printing of a pad printing station are influenced;

thirdly, the material conveying groove must extend from the buffer station to the pad printing station, the distance is long, and the requirement on the straightness of the conveying groove is high.

For this reason, there is a need for improvements and optimizations to existing pad printing machines.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the pad printing machine which is accurate in material pushing and transferring, free of tooth punching and good in pad printing quality.

The embodiment of the invention provides a pad printing machine, which comprises a feeding channel and further comprises:

the pushing assembly comprises a pushing plate and a first driving unit for driving the pushing plate to push materials;

the material blocking assembly is arranged opposite to the material pushing assembly and comprises a material blocking plate and a multi-stroke mechanism, the material blocking plate is connected with the multi-stroke mechanism, the material blocking plate can be matched with the material pushing plate and used for clamping materials in the feeding channel, the material blocking plate is provided with a material blocking station, a discharging station and a material separating station, and the multi-stroke mechanism can drive the material blocking plate to move from the discharging station to the material separating station and drive the material blocking plate to move from the material separating station to the material blocking station;

and the material moving assembly is used for receiving the materials clamped by the material pushing plate and the material blocking plate and transferring the materials to a transfer printing station, and comprises a negative pressure adsorption unit and a second driving unit for driving the negative pressure adsorption unit to reciprocate.

The pad printing machine provided by the embodiment of the invention at least has the following beneficial effects: the material pushing assembly is matched with the material blocking assembly, the material is pushed onto the material moving assembly, the material is moved by the material moving assembly, the mode that the material is transversely moved to a pad printing station through a material blocking plate in the traditional technology is abandoned, in the material pushing process, the material is clamped by the material pushing plate and the material blocking plate and is longitudinally pushed onto the material moving assembly, and the transverse center distance between the materials is kept consistent; the negative pressure adsorption unit through the material shifting assembly adsorbs fixed materials, the materials are in the process of being transferred to the pad printing station, the problem of contact friction between the materials and the wall of a transportation groove in the prior art does not exist, friction damage to the surfaces of the materials cannot be caused, the materials cannot rotate or shift due to friction, the center distance of the materials transferred to the pad printing station is kept consistent, the fork material plate can accurately push the materials to the lower side of a pad printing rubber head, the phenomenon that the fork material cannot be inserted or tooth punching occurs cannot occur, the service life of spare and accessory parts such as the fork material plate is prolonged, the consistency and the accuracy of a printing effect can be ensured, and the pad printing quality is greatly improved.

According to some embodiments of the invention, the multi-stroke mechanism comprises a mounting seat and a sliding rod connected to the mounting seat, one end of the sliding rod is fixedly connected with the striker plate, a return spring is arranged between the mounting seat and the striker plate to push the striker plate to move from a material separating station to the striker plate, the other end of the sliding rod is connected with a third driving unit, and the third driving unit drives the striker plate to move from a blanking station to the material separating station.

According to some embodiments of the invention, the third driving unit is a cylinder, an output rod of the cylinder extends out and then abuts against the mounting seat, and the sliding rod drives the striker plate to move from the blanking station to the material separating station; or the third driving unit is a stepping motor or a servo motor.

According to some embodiments of the invention, the return spring is sleeved on the sliding rod, one end of the return spring is abutted with the striker plate, and the other end of the return spring is abutted with the mounting seat; or a sleeve rod is arranged on the striker plate or the mounting seat, and the return spring is sleeved on the sleeve rod.

According to some embodiments of the invention, the number of the two sliding rods is two, and the two sliding rods are sleeved with the return spring.

According to some embodiments of the invention, the multi-stroke mechanism comprises two cylinders, including a first cylinder and a second cylinder, an output rod of the first cylinder is connected with the striker plate, and an output rod of the second cylinder is connected with the first cylinder; or the multi-stroke mechanism comprises a servo motor, and an output screw rod of the servo motor is connected with the striker plate; or the multi-stroke mechanism comprises a stepping motor, and an output screw rod of the stepping motor is connected with the material baffle plate.

According to some embodiments of the invention, the ejector plate is provided with positioning grooves.

According to some embodiments of the invention, the detent has at least one inclined detent wall.

According to some embodiments of the invention, the positioning groove of the ejector plate is a V-shaped groove, or the positioning groove of the ejector plate is a trapezoidal groove.

According to some embodiments of the invention, the walls of adjacent positioning slots are spaced apart.

According to some embodiments of the invention, the striker plate comprises a removable striker block, and the striker block is provided with a wear layer.

According to some embodiments of the invention, the material blocking block is provided with a yielding inclined surface at a position above the wear-resistant layer, so that the material can be observed conveniently.

According to some embodiments of the invention, the feeding channel is provided with a feeding bottom plate, the feeding bottom plate is provided with an L-shaped opening, and the striker plate is located at the position of the L-shaped opening in the striker station.

According to some embodiments of the invention, the feeding channel is provided with a feeding side plate, the feeding side plate is arranged opposite to the striker plate, a through groove is formed in the feeding side plate, and the material pushing plate penetrates through the through groove and then extends into the feeding channel.

According to some embodiments of the invention, the first driving unit is a cylinder, or a stepping motor, or a servo motor.

According to some embodiments of the present invention, the first driving unit is connected to the material pushing plate through a sliding block, and the sliding block is provided with a sliding rail or a sliding groove.

According to some embodiments of the invention, the transfer assembly comprises a pitch module having a plurality of pitch units on which the negative pressure adsorption unit is mounted.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

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

fig. 1 is a schematic structural diagram of a pad printing machine according to an embodiment of the present invention (a partial schematic diagram, unrelated structures are not shown, such as a vibrating feeding tray, a pad printing device, a drying device, etc. are not shown);

FIG. 2 is a schematic structural view of the material moving assembly and the feeding channel hidden in FIG. 1;

FIG. 3 is a schematic diagram of the construction of the pusher assembly in an embodiment of the present invention;

FIG. 4 is a schematic structural view of the stripper plate of FIG. 3;

FIG. 5 is a partial enlarged view of B in FIG. 4;

fig. 6 is a schematic structural diagram of a material blocking assembly in the embodiment of the invention;

FIG. 7 is a schematic view of the retainer block of FIG. 6;

fig. 8 is another structural schematic diagram of the striker assembly in the embodiment of the invention;

FIG. 9 is another angular schematic of FIG. 8;

FIG. 10 is a schematic structural diagram of a material moving assembly in an embodiment of the present invention;

FIG. 11 is a schematic view of the structure associated with the feed channel in an embodiment of the present invention;

FIG. 12 is a schematic structural view of a feed side plate in an embodiment of the present invention;

FIG. 13 is the schematic view of FIG. 11 with the top feeder plate hidden;

FIG. 14 is a view showing a position of the ejector plate in FIG. 13 according to the embodiment of the present invention;

fig. 15 is a schematic diagram of a structure of a CD series inductor in the prior art.

Reference numerals

The inductor comprises an inductor 100, an upper cover 101, a center post 102, a lower cover 103 and a wire hanging groove 104;

a feeding channel 200, a feeding bottom plate 210, a feeding side plate 220 and a through groove 221;

the pushing assembly 300, a pushing plate 310, a positioning slot 311, an inclined positioning slot wall 312, a first driving unit 320, and a first bracket 330;

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

the material moving assembly 500, the negative pressure adsorption unit 510, the pitch changing module 520 and the pitch changing unit 521.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the positional descriptions, such as the directions or positional relationships indicated above, below, front, back, left, right, inside, outside, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular direction, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise expressly limited, the terms set, mounted, connected, assembled, matched, etc. should be construed broadly, and those skilled in the art can reasonably determine the meaning of the terms in the present invention by combining the detailed contents of the technical solutions.

The invention is described below with reference to a CD series inductor product as an example so that the person skilled in the art can easily understand the invention.

Taking a CD series inductor as an example, referring to fig. 15, an inductor 100 includes an upper cover 101, a center pillar 102 and a lower cover 103, where the upper cover 101, the center pillar 102 and the lower cover 103 form an i-shaped structure, an inward recessed wire hanging groove 104 is provided at an edge of the upper cover 101, a silver paste needs to be printed on a surface of the upper cover 101 to form an electrode, and when the silver paste is pad printed, it is required to ensure that a position of actual pad printing is consistent with a position of pad printing required by design, otherwise, a pad printing effect cannot be guaranteed, stability of product quality is affected, and even yield of the product is affected. It can be understood that the pad printing machine of the invention can be used for pad printing not only for CD series inductors, but also for other inductor products, such as NR series inductors, and for other non-inductor products.

Referring to fig. 1-6, an embodiment of the present invention provides a pad printing machine, which includes a feeding channel 200, where the feeding channel 200 is used to receive an inductor 100 conveyed from a vibrating feeding tray, the inductor 100 enters the feeding channel 200 at a position indicated by an arrow a in fig. 1 and 11 according to a designed angle, and the inductors 100 are arranged in the feeding channel 200 in a row and closely attached in a transverse direction (X direction), and wait for being transferred to a pad printing station for printing.

A pushing assembly 300, the pushing assembly 300 being mounted on a base (not shown) through a first bracket 330; the material pushing assembly 300 includes a material pushing plate 310 and a first driving unit 320 for driving the material pushing plate 310 to push the material, in this embodiment, a material pushing direction (Y direction) of the material pushing plate 310 is perpendicular to an arrangement direction (X direction, also a material transferring direction for moving the inductor 100 to a transfer printing station) of the inductor 100 in the material feeding channel 200, the material pushing plate 310 does not need to be inserted between the center pillars 102 of adjacent inductors 100 to push the inductor 100 to move in the X direction, and the material transferring of the inductor 100 in the X direction is completed by the material transferring assembly 500.

The material blocking assembly 400 is mounted on a base (not shown) through a second support 430, the material blocking assembly 400 and the material pushing assembly 300 are oppositely arranged, the opposite arrangement means that the material blocking assembly 400 and the material pushing assembly 300 can be matched with each other to clamp the inductor 100, in the embodiment, the material pushing assembly 300 is arranged on one side of the feeding channel 200, the material blocking assembly 400 is arranged on the other side of the feeding channel 200, when the inductor is pushed, the material pushing plate 310 abuts against one side surface (Y direction) of the inductor 100, the material blocking plate 410 abuts against the other side surface of the inductor 100, and the material blocking plate 410 and the material pushing plate 310 are matched to clamp the inductor 100, so that the inductor 100 is pushed onto the material pushing assembly 500 from the feeding channel 200; the material blocking assembly 400 comprises a material blocking plate 410 and a multi-stroke mechanism, the material blocking plate 410 is connected with the multi-stroke mechanism 420, the material blocking plate 410 is provided with a material blocking station, a material discharging station and a material separating station according to different working positions, the material blocking station refers to a working position where the material blocking plate 410 can block the inductor in the material feeding channel 200 and avoid the inductor 100 from being separated from the material feeding channel 200, in the material blocking station, when the material pushing plate 310 acts, the material pushing plate 310 extends out, and the material blocking plate 410 is matched with the material pushing plate 310 to clamp the inductor 100; the blanking station refers to a working position of the striker plate 410 when the clamped inductor 100 is pushed to a preset position on the material moving assembly 500, at the blanking station, the striker plate 410 cannot clamp the inductor 100 and continues to move in the Y direction, and the inductor 100 reaches the preset position on the material moving assembly 500 at the blanking station and is adsorbed and fixed by the negative pressure adsorption unit 510; the material separating station refers to a working position where the material blocking plate 410 reaches after releasing clamping on the inductor 100, after the inductor 100 is fed to the material moving assembly 500 at the feeding station, the material moving assembly 500 drives the inductor 100 to move in the X direction, at the moment, if the material blocking plate 410 is still in contact with the inductor 100, the inductor 100 can be subjected to side friction of the material blocking plate 410 when moving in the X direction, the inductor 100 can be possibly turned or deviated, and therefore, the material blocking plate 410 is separated from the inductor 100 through the material separating station, and the material moving assembly 500 is convenient to move materials. Therefore, the multi-stroke mechanism 420 has at least 2 strokes, one stroke is to drive the striker plate 410 to move from the blanking station to the material separating station to separate the striker plate 410 from the inductor 100, and the other stroke is to drive the striker plate 410 to move from the material separating station to the striker plate to wait for the next striker plate;

referring to fig. 1, the transferring assembly 500 is disposed on the other side of the feeding channel 200 with respect to the side where the pushing assembly 300 is located, the transferring assembly 500 includes a negative pressure adsorption unit 510 and a second driving unit (not shown in the drawings) for driving the negative pressure adsorption unit 510 to reciprocate, the negative pressure adsorption unit 510 is used for adsorbing and fixing the inductor 100, so that the inductor 100 does not fall off during feeding, and the position of the inductor is not changed or shifted, the second driving unit drives the negative pressure adsorption unit 510 to move to the transfer printing station, and the inductor 100 on the transferring assembly 500 is pushed below the transfer printing head to complete transfer printing. After the inductor 100 is separated from the material moving assembly 500, the material moving assembly 500 returns to wait for the material pushing assembly 300 to push the inductor 100 onto the material moving assembly 500 again, and so on.

The material is pushed to the material moving assembly 500 through the matching of the material pushing assembly 300 and the material blocking assembly 400, and the material is moved through the material moving assembly 500, so that the mode that the material is moved to a pad printing station transversely (in the X direction) through a material blocking plate in the traditional technology is abandoned, in the material pushing process, the material is clamped by the material pushing plate 310 and the material blocking plate 410 and is pushed to the material moving assembly 500 longitudinally, and the transverse center distance between the inductors 100 is kept consistent; the negative pressure adsorption unit 510 of the transfer assembly 500 is used for transversely transferring the inductor 100, the inductor 100 is transferred to a transfer printing station in the process of transferring the inductor to the transfer printing station, the problem of contact friction between the inductor and the wall of a transportation groove in the prior art does not exist, friction damage to the surface of the inductor can not be caused, the inductor can not rotate or shift due to friction, the distance between the center of the inductor transferred to the transfer printing station is kept consistent, the inductor can be accurately pushed to the lower side of a transfer printing rubber head by a fork plate, the phenomenon that the fork plate cannot be inserted or toothed can not occur, the service life of parts such as the fork plate is prolonged, the consistency and accuracy of a printing effect can be ensured, and the transfer printing quality is greatly improved.

Referring to fig. 6, in some embodiments of the present invention, the multi-stroke mechanism 420 includes a mounting seat 421 and a sliding rod 422 connected to the mounting seat 421, one end of the sliding rod 422 is fixedly connected to the striker plate 410, a return spring 423 is disposed between the mounting seat 421 and the striker plate 410 to push the striker plate 410 to move from the material separating station to the striker station, the other end of the sliding rod 422 is connected to a third driving unit 424, and the third driving unit 424 pushes the striker plate 410 to move from the material discharging station to the material separating station. The working process is as follows: the striker plate 410 is always positioned at a striker station and is in contact with the side wall of the inductor 100 under the action of the reset force of the reset spring 423, when the sensor detects that the inductors in the feeding channel 200 are arranged in place, the first driving unit 320 acts to drive the push plate 310 to extend, the inductor 100 is clamped by the striker plate 410 and the push plate 310, the reset spring 423 is compressed along with the continuous advancing of the push plate 310, the inductor 100 is pushed to the moving assembly 500 under the clamping, the effect of the reset force of the reset spring 423 ensures that the push plate 310 and the striker plate 410 clamp the inductor 100 all the time, the inductor 100 cannot deflect or displace, when the inductor 100 enters the moving assembly 500 and reaches a preset position, the striker plate 410 is positioned at a blanking station, the push plate 310 does not continue to advance any more, at the moment, the third driving unit 424 acts to drive the striker plate 410 to move from the blanking station to a leaving station, and the striker plate 410 is released from contact with the inductor 100, the inductor 100 is reliably fixed on the transfer assembly 500 by the negative pressure adsorption unit 510, and is delivered to the transfer station from the transfer assembly 500. After the material moving assembly 500 leaves, the third driving unit 424 releases the acting force on the striker plate 410, and the striker plate 410 moves from the material separating station to the material blocking station under the action of the return spring 423 and waits for the next material blocking. In the process, the material moving assembly 500 finishes feeding and returns to the original position, the material pushing plate 310 performs the next round of action, cooperates with the material baffle plate 410 to clamp and push the plurality of inductors 100 on the feeding channel 200 onto the material moving assembly 500, and the process is repeated in this way, so that the inductors 100 are continuously pushed onto the material moving assembly 500 and are transferred to the pad printing station by the material moving assembly 500, and full-automatic material pushing and moving is formed, and the pad printing machine continuously works.

In some embodiments of the present invention, the third driving unit 424 is a cylinder, which has a simple structure, is easy to purchase, has low cost, and is fast in response and easy to control. Referring to fig. 2, after the output rod 4241 of the air cylinder extends out, the output rod 4241 abuts against the mounting seat 421, the sliding rod 422 drives the striker plate 410 to move from the blanking station to the material separating station, the return spring 423 is further compressed, after the inductor 100 is conveyed by the material moving assembly 500, the output rod 4241 retracts, and at the moment, the striker plate 410 moves to the material blocking station under the action of the return force of the return spring 423; in other embodiments of the present invention, the third driving unit 424 is a stepping motor or a servo motor.

In some embodiments of the present invention, as shown in fig. 2, the return spring 423 is sleeved on the sliding rod 422, one end of the return spring 423 abuts against the striker plate 410, and the other end of the return spring 423 abuts against the mounting seat 421, so that the structure is simple, and the installation is convenient. It can be understood that the return spring 423 may not be sleeved on the sliding rod 422, as long as the return spring 423 can provide a return force for the striker plate 410, for example, a sleeve rod may be separately disposed on the striker plate 410 or the mounting seat 421 to sleeve the return spring 423, so that the same effect as that the return spring 423 is sleeved on the sliding rod 422 can be achieved.

In some embodiments of the present invention, two sliding rods 422 are provided, and the two sliding rods 422 are both sleeved with the return spring 423, so that the striker plate 410 is more balanced in stress, timely in return response, and accurate in return stroke.

Referring specifically to fig. 8 and 9, in some embodiments of the present invention, the multi-stroke mechanism 420 includes two cylinders, including a first cylinder 425 and a second cylinder 426, wherein an output rod of the first cylinder 425 is connected to the striker plate 410, and an output rod of the second cylinder 426 is connected to the first cylinder 425, and the operation process is as follows: the striker plate 410 is positioned at a striker station under the action of the first cylinder 425, when the sensor detects that the inductors 100 in the feeding channel 200 are arranged in place, the first driving unit 320 acts to drive the ejector plate 310 to extend, the inductors 100 are clamped by the striker plate 410 and the ejector plate 310, the ejector plate 310 continues to extend, the output rod of the first cylinder 425 retracts synchronously, the inductors 100 are clamped and pushed to the material moving assembly 500, because the first driving unit 320 and the first cylinder 425 act synchronously, the inductors 100 are ensured to be clamped by the ejector plate 310 and the striker plate 410 all the time, the inductors 100 cannot deflect or displace, when the inductors 100 enter the material moving assembly 500 and reach a preset position, the striker plate 410 is positioned at a blanking station, the ejector plate 310 does not continue to advance any more, at the moment, the second cylinder 426 acts to drive the first cylinder 425 to retreat in the Y direction, the first cylinder 425 drives the striker plate 410 to move from the blanking station to a material separating station, the striker plate 410 is released from 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 conveyed to the transfer station by the transfer assembly 500. After the material moving assembly 500 leaves, the output shafts of the second cylinder 426 and the first cylinder 425 extend, the striker plate 410 moves from the material separating station to the striker plate station, in the process, the material moving assembly 500 returns to the original position after completing feeding, the material pushing plate 310 performs the next round of action, cooperates with the striker plate 410 to clamp and push the plurality of inductors 100 on the feeding channel 200 to the material moving assembly 500, and the above-mentioned operation is repeated, so that the inductors 100 are continuously pushed to the material moving assembly 500 and are transferred to the pad printing station by the material moving assembly 500, thereby forming full-automatic material pushing and moving, and enabling the pad printing machine to continuously work.

It will be appreciated that multi-stroke mechanism 420 may also be of other configurations; in some specific embodiments, the multi-stroke mechanism 420 includes a servo motor, an output screw of the servo motor is connected with the striker plate 410, and the servo motor can precisely control multiple strokes, so as to drive the striker plate 410 to move from a blanking station to a material separating station and drive the striker plate 410 to move from the material separating station to the striker plate; in other embodiments, the multi-stroke mechanism comprises a stepper motor, and an output screw of the stepper motor is connected to the striker plate 410.

In some embodiments of the present invention, the positioning groove 311 is disposed on the material pushing plate 310, and the positioning groove 311 is used to position the center pillar 102 of the inductor 100, so that the center-to-center distance between the inductors 100 is more accurate in the material pushing process; in some embodiments, the positioning slot 311 has at least one inclined positioning slot wall 312, wherein the inclined positioning slot wall is inclined at an inclined angle relative to the Y direction; the inclined positioning groove wall 312 is used for abutting against the center pillar 102 of the inductor 100 when pushing materials, the center pillar 102 abuts against the inclined positioning groove wall 312 and is limited by the positioning groove 311, so that the inductor 100 is not prone to X-direction displacement in the material pushing process, and the inductor 100 can be more accurately pushed to the material moving assembly 500. In some embodiments, the positioning slot 311 of the material pushing plate 310 is a V-shaped slot or a trapezoidal slot, and the V-shaped slot or the trapezoidal slot can better cooperate with the center pillar 102 of the inductor 100 to achieve accurate positioning. It is understood that the locating slot 311 is not necessary, and the inductor 100 is not deflected or displaced during the pushing process because the inductor 100 is clamped by the two sides of the material pushing plate 310 and the material stopping plate 410.

Referring to fig. 4 and 5, in some embodiments of the invention, the walls of two adjacent positioning slots 311 are spaced apart, and if the walls of two adjacent positioning slots 311 contact or close together, the opening of the positioning slot 311 will become wider, and a longer stroke of the first driving unit 320 is required to enable the positioning slot 311 to abut against the center pillar 102 of the inductor 100 for positioning, so that the walls of two adjacent positioning slots 311 are spaced apart, which can reduce the opening width of the positioning slot 311, thereby shortening the stroke of the first driving unit 320.

Referring to fig. 6 and 7, in some embodiments of the present invention, the striker plate 410 includes a removable striker block 411, and a wear layer 412 is disposed on the striker block 411. When the material is stopped, the material pushing plate 310 acts, the inductor 100 has an impact force on the material stopping plate 410, and the arrangement of the wear-resistant layer 412 is beneficial to improving the strength of the clamping position and prolonging the service life. The material blocking block 411 is connected and installed on the material blocking plate 410, the material blocking block 411 serves as a consumable material, and can be conveniently disassembled and replaced without disassembling and replacing the material blocking plate 410.

In some embodiments of the present invention, the material blocking block 411 is provided with a position-avoiding inclined plane 413 above the wear-resistant layer 412, so as to facilitate observing materials, such as observing whether materials are lacking, and facilitate an operator to grasp the in-place condition of the inductor 100 in the feeding channel 200 at any time.

In some embodiments of the present invention, the feeding channel 200 has a feeding bottom plate 210, an L-shaped opening is disposed on the feeding bottom plate 210, and the striker plate 410 is located at the L-shaped opening position in the striker station, so that the structure is compact, and the striker plate 410 can conveniently striker the inductor 100 in the feeding channel 200, it is understood that the feeding bottom plate 210 may also have other structures.

In some embodiments of the present invention, the feeding channel 200 has a feeding side plate 220, the feeding side plate 220 is disposed opposite to the striker plate 410 and is used for blocking two sides of the inductor 100 in the Y direction, a through groove 221 is disposed on the feeding side plate 220, and the material pushing plate 310 passes through the through groove 221 and then extends into the feeding channel 200. Compact structure and convenient installation. It is understood that the feeding side plate may be divided into two side plates, and the two side plates are spaced apart from each other to facilitate the yielding of the pusher plate 410, or may be of other configurations not mentioned herein. The feed channel 200 further includes a feed ceiling 230, etc.

In some embodiments of the present invention, the first driving unit 320 is an air cylinder, and in other embodiments, the first driving unit 320 is a stepping motor or a servo motor. In order to make the pushing action of the pushing plate 310 more stable, in some embodiments, the first driving unit 320 is connected to the pushing plate 310 through a sliding block, and the sliding block is provided with a sliding rail or a sliding groove.

Because a plurality of products are printed simultaneously during pad printing, a plurality of pad printing rubber heads are provided, a certain distance exists between the pad printing rubber heads, when printing is carried out, if the inductors are too close to each other, printing cannot be finished, and before the inductors are sent into a pad printing device for printing, the central distance between adjacent inductors must meet the design requirement, so that the inductors correspond to the pad printing rubber heads in position. Referring to fig. 1 and 10, in some embodiments of the present invention, the transferring assembly 500 includes a pitch varying module 520, the pitch varying module 520 has a plurality of pitch varying units 521, the negative pressure adsorption unit 510 is installed on the pitch varying units 521, after the transferring assembly 500 receives the inductor 100, the pitch varying module 520 acts to vary the pitch, so that the inductor 100 completes the pitch varying during the feeding process, the pitch varying module 520 can control the center-to-center distance between the inductors 100 very precisely, after the inductor 100 reaches the transfer printing station, there is no need to divide the material, i.e. adjust the center-to-center distance between the inductors, on one hand, there is no problem that the fork cannot be inserted or toothed, on the other hand, there is no problem that the existing transferring machine uses long and short forks, on the existing transferring machine, because the transferring material needs to be performed by short forks, the positioning slots with long and short forks are as the positioning slots on the conventional striker plate, the width dimension is larger than the radial width of the center pillar 102, the center distance between the adjacent inductors cannot be ensured to be completely consistent during material distribution, but the invention completely solves a plurality of defects caused by long and short fork material distribution by creatively using the variable pitch module on the pad printing machine, has higher working efficiency, more accurate center distance between the adjacent inductors and more reliable and stable printing quality. It can be understood that when the pitch changing module 520 is not provided, the inductor 100 is transferred to the pad printing station through the cooperation of the material pushing assembly 300, the material blocking assembly 400 and the material transferring assembly 500, and then the material can be distributed by using a conventional long and short fork. The specific structure of the pitch varying module is the prior art, and will not be described herein.

In the embodiment of the invention, the material is pushed to the material moving assembly 500 through the matching of the material pushing assembly 300 and the material blocking assembly 400, and the material is moved through the material moving assembly 500, so that the mode of transversely moving the material to a pad printing station through a material blocking plate in the traditional technology is abandoned, in the material pushing process, the material is clamped by the material pushing plate 310 and the material blocking plate 410 and is longitudinally pushed to the material moving assembly 500, and the transverse center distance between the materials is kept consistent; the negative pressure adsorption unit 510 through the material transferring assembly 500 adsorbs fixed materials, the materials are transferred to the pad printing station in the process, the problem of contact friction with the wall of a transportation groove in the traditional technology does not exist, friction damage to the surface of the materials can not be caused, the materials can not rotate or shift due to friction, the center distance of the materials transferred to the pad printing station is kept consistent, the fork material plate can accurately push the materials to the pad printing station, the phenomenon that the fork material plate cannot be inserted or tooth punching occurs can not occur, the service life of parts such as the fork material plate is prolonged, the consistency and the accuracy of a printing effect can be ensured, and the pad printing quality is greatly improved.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (17)

1. The pad printing machine comprises a feeding channel and is characterized by further comprising:

the pushing assembly comprises a pushing plate and a first driving unit for driving the pushing plate to push materials;

the material blocking assembly is arranged opposite to the material pushing assembly and comprises a material blocking plate and a multi-stroke mechanism, the material blocking plate is connected with the multi-stroke mechanism, the material blocking plate can be matched with the material pushing plate and used for clamping materials in the feeding channel, the material blocking plate is provided with a material blocking station, a discharging station and a material separating station, and the multi-stroke mechanism can drive the material blocking plate to move from the discharging station to the material separating station and drive the material blocking plate to move from the material separating station to the material blocking station;

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

2. Pad printing machine according to claim 1, characterized in that: the multi-stroke mechanism comprises a mounting seat and a sliding rod connected to the mounting seat, one end of the sliding rod is fixedly connected with the striker plate, a reset spring is arranged between the mounting seat and the striker plate to push the striker plate to move to the striker plate from a material station, the other end of the sliding rod is connected with a third driving unit, and the third driving unit drives the striker plate to move to the material station from a material station.

3. A pad printing machine according to claim 2, characterized in that: the third driving unit is an air cylinder, an output rod of the air cylinder extends out and then abuts against the mounting seat, and the striker plate is driven by the sliding rod to move from the blanking station to the material separating station; or the third driving unit is a stepping motor or a servo motor.

4. A pad printing machine according to claim 2 or 3, characterized in that: the reset spring is sleeved on the sliding rod, one end of the reset spring is abutted with the striker plate, and the other end of the reset spring is abutted with the mounting seat; or a sleeve rod is arranged on the striker plate or the mounting seat, and the return spring is sleeved on the sleeve rod.

5. Pad printing machine according to claim 4, characterized in that: the number of the slide bars is two, and the two slide bars are sleeved with return springs.

6. A pad printing machine according to claim 1, characterized in that: the multi-stroke mechanism comprises two cylinders, including a first cylinder and a second cylinder, wherein an output rod of the first cylinder is connected with the striker plate, and an output rod of the second cylinder is connected with the first cylinder; or the multi-stroke mechanism comprises a servo motor, and an output screw rod of the servo motor is connected with the striker plate; or the multi-stroke mechanism comprises a stepping motor, and an output screw rod of the stepping motor is connected with the material baffle plate.

7. Pad printing machine according to claim 1, characterized in that: and the material pushing plate is provided with a positioning groove.

8. A pad printing machine according to claim 7, wherein: the positioning groove has at least one inclined positioning groove wall.

9. A pad printing machine according to claim 8, wherein: the positioning groove of the material pushing plate is a V-shaped groove, or the positioning groove of the material pushing plate is a trapezoid groove.

10. A pad printing machine according to claim 9, wherein: the walls of two adjacent positioning grooves are spaced at intervals.

11. Pad printing machine according to claim 1, characterized in that: the striker plate comprises a detachable striker block, and a wear-resistant layer is arranged on the striker block.

12. A pad printing machine according to claim 11, wherein: the material blocking block is arranged above the wear-resistant layer and provided with a yielding inclined plane so as to facilitate observation of materials.

13. A pad printing machine according to claim 1, characterized in that: the feeding channel is provided with a feeding bottom plate, an L-shaped opening is formed in the feeding bottom plate, and the material blocking plate is located at the position of the L-shaped opening when the material blocking station is located.

14. Pad printing machine according to claim 1 or 13, characterized in that: the feeding channel is provided with a feeding side plate, the feeding side plate is opposite to the material baffle plate, a through groove is formed in the feeding side plate, and the material pushing plate penetrates through the through groove and then extends into the feeding channel.

15. A pad printing machine according to claim 1, characterized in that: the first driving unit is an air cylinder, or a stepping motor, or a servo motor.

16. A pad printing machine according to claim 1 or 15, characterized in that: the first driving unit is connected with the material pushing plate through a sliding block, and a sliding rail or a sliding groove is arranged on the sliding block.

17. A pad printing machine according to claim 1, characterized in that: the material moving assembly comprises a variable pitch module, the variable pitch module is provided with a plurality of variable pitch units, and the negative pressure adsorption unit is installed on the variable pitch units.

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