CN114434954A

CN114434954A - Multi-surface pad printing device and multi-surface pad printing method

Info

Publication number: CN114434954A
Application number: CN202111654477.8A
Authority: CN
Inventors: 饶树林; 代启龙; 万兵; 丁超; 金火星
Original assignee: LCFC Hefei Electronics Technology Co Ltd
Current assignee: LCFC Hefei Electronics Technology Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-05-06

Abstract

The multi-face pad printing device comprises a pad printing machine, a product setting mechanism and a stopping mechanism, wherein the pad printing machine comprises a printing head and an oil groove, the printing head can move upwards in the X direction and the Z direction relative to the oil groove, the oil groove is provided with a plurality of printing information areas in the X direction side by side, the product setting mechanism is used for setting a to-be-printed product comprising a plurality of to-be-printed surfaces, the product setting mechanism comprises a rotatable dividing disc and a connecting shaft which is connected with the dividing disc and can rotate along with the dividing disc, the to-be-printed product is arranged on the connecting shaft, the stopping mechanism is used for stopping the dividing disc so that any to-be-printed surface of the to-be-printed product can be located at a printing position, and the movement of the printing head in the X direction is limited to move between the printing information areas and the printing position along the X direction. This once clamping of disclosure just can accomplish multiaspect printing, has promoted printing productivity and printing quality, has reduced the human cost, and equipment cost is low.

Description

Multi-surface pad printing device and multi-surface pad printing method

Technical Field

The present disclosure relates to the field of printing devices and printing methods, and in particular, to a multi-surface pad printing device and a multi-surface pad printing method.

Background

In order to print a product comprising a plurality of surfaces to be printed, in the prior art, screen printing or pad printing is adopted, a jig is fixed on equipment firstly, the product is installed on the jig, one surface is printed, then the product is taken down to enter the next station of a production line, and the installation and printing are repeated on the jig of the next station; or the product is fixed, and single-sided multilayer printing is realized by controlling a plurality of rubber heads through a plurality of servos in a pad printing mode.

The printing method of the prior art has the following problems: (1) when multi-surface printing is carried out, multiple clamping is needed, the printing capacity is low, printing characters are easy to lose in the multiple clamping and disassembling processes, and the printing quality is reduced; (2) one printing manpower is needed for printing one surface, and the manpower cost required by multi-plane printing is high; (3) a plurality of servo control mechanisms are needed to control a plurality of rubber heads, and the equipment cost is high.

Disclosure of Invention

In view of the above, according to one aspect of the present disclosure, a multi-surface pad printing apparatus is provided as follows.

A multi-sided pad printing apparatus comprising:

the pad printing machine comprises a printing head and an oil groove, wherein the printing head can move in the X direction and the Z direction relative to the oil groove, and a plurality of printing information areas are arranged in the X direction of the oil groove side by side;

the product setting mechanism is used for setting a to-be-printed product comprising a plurality of to-be-printed surfaces, and comprises a rotatable dividing disc and a connecting shaft which is connected with the dividing disc and can rotate along with the dividing disc, and the to-be-printed product is arranged on the connecting shaft; and

the stopping mechanism is used for stopping the index plate so as to enable one of the surfaces to be printed of the products to be printed to be in a printing position;

wherein movement of the print head in the X direction is defined as movement in the X direction between the printed information region and the print position.

In an embodiment, the indexing disc has N circumferential clamping grooves, the N clamping grooves divide the outer edge of the indexing disc into N arc-shaped edges, the stopping mechanism includes an elastic member and a roller, when a force is applied to the indexing disc to rotate the indexing disc, the elastic member is compressed, and the roller abuts against the arc-shaped edges; when the acting force is cancelled, the roller is positioned at the position clamped with the clamping groove under the action of the restoring force of the elastic piece so as to stop stopping the dividing plate.

In one embodiment, the roller is disposed on a seat having a bottom surface connected to one end of the resilient member.

In an embodiment, the stop mechanism further comprises a guide post, and the support is slidably connected with the guide post and is limited to move along the guide post.

In an embodiment, the indexing disc has 4 clamping grooves in the circumferential direction, the 4 clamping grooves divide the outer edge of the indexing disc into 4 arc-shaped edges, and the to-be-printed product is a square with 4 to-be-printed surfaces.

In an embodiment, the plurality of printed information areas and the plurality of surfaces to be printed correspond to each other one by one.

According to another aspect of the disclosure, a multi-surface pad printing method is also provided, and the technical scheme is as follows.

The multi-surface pad printing method is used for printing a to-be-printed product comprising a plurality of to-be-printed surfaces by the multi-surface pad printing device, and comprises the following steps:

a step of mounting a to-be-printed product, which is used for arranging the to-be-printed product on the connecting shaft;

an oil adding step, which is used for pouring oil required by printing into the oil groove;

a step of rotating and stopping the dividing disc, which is used for rotating the dividing disc to enable one surface to be printed of a to-be-printed product to be in a printing position and then stopping the dividing disc;

the printing head oil-material sticking step is used for moving the printing head to the position above one of the information printing areas along the X direction and then moving the printing head along the Z direction to stick oil material in the oil groove;

the step of contacting the printing head with the oil adhered thereon with the surface to be printed is used for moving the printing head with the oil adhered thereon along the X direction to a printing position to contact with the surface to be printed of the product to be printed, and resetting the printing head after one-side printing is finished;

and repeating the step of rotating and stopping the index plate, the step of adhering the oil material by the printing head and the step of contacting the printing head with the surface to be printed after the oil material is adhered until the plurality of surfaces to be printed are printed.

In one embodiment, in the step of the printing head picking up the oil, the printing head is moved to the position above the corresponding printing information area according to the corresponding relationship between the surface to be printed and the printing information area, and then moved along the Z direction to pick up the oil in the oil groove.

In one embodiment, in the step of rotating and stopping the indexing disc, the indexing disc is rotated by applying a force on the indexing disc to compress the elastic member so that the roller is abutted against the arc-shaped edge; and when the acting force is removed, the roller is positioned at the position clamped with the clamping groove through the reset of the elastic piece so as to stop the dividing plate.

In one embodiment, before the step of the printing head sticking the oil, a step of adjusting the printing head is further included, which is used for setting the initial position of the printing head in the Z direction to avoid the interference when the printing head moves along the X direction.

The present disclosure has the following beneficial effects: based on the arrangement of the pad printing machine and the dividing plate, multi-surface printing can be completed by one-time clamping, so that the printing capacity is improved, and the labor cost is reduced; and, control through the graduated disk and treat the printed matter gesture, on the one hand, avoided clamping many times and dismantle the printed character quality problem that the in-process caused, promoted the printing quality, on the other hand, need not servo control mechanism adjustment and treat the position of printed matter, equipment cost is low.

Advantages and features of the present disclosure are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present disclosure are included to provide an understanding of the present disclosure. The drawings illustrate embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure. In the drawings, there is shown in the drawings,

FIG. 1a is a perspective view (looking in a direction) of a multi-sided pad printing device according to one exemplary embodiment of the present disclosure;

FIG. 1b is a perspective view (looking in another direction) of a multi-sided pad printing apparatus according to one exemplary embodiment of the present disclosure;

FIG. 2 is a perspective view of the multi-sided pad printing device shown in FIG. 1a with the pad printer removed;

FIG. 3a is a schematic view (one) of a printing state of the multi-sided pad printing apparatus shown in FIG. 1 a;

FIG. 3b is a front view of the state shown in FIG. 3 a;

FIG. 4 is a schematic view (two) of the multi-sided pad printing apparatus shown in FIG. 1a showing a printing state;

FIG. 5a is a schematic view (III) of the multi-sided pad printing apparatus shown in FIG. 1a in a printing state;

FIG. 5b is a front view of the state shown in FIG. 5 a;

FIG. 6 is a schematic view (IV) of the multi-sided pad printing apparatus shown in FIG. 1a in a printing state;

FIG. 7a is a schematic view (V) of the multi-sided pad printing apparatus shown in FIG. 1a in a printing state;

FIG. 7b is a front view of the state shown in FIG. 7 a;

FIG. 8 is a schematic View (VI) of the multi-sided pad printing apparatus shown in FIG. 1a in a printing state;

FIG. 9a is a schematic View (VII) of the multi-sided pad printing apparatus shown in FIG. 1 a;

FIG. 9b is a front view of the state shown in FIG. 9 a;

FIG. 10 is a schematic view (eight) of the multi-sided pad printing apparatus shown in FIG. 1a in a printing state.

The reference numbers in the figures illustrate:

10. a pad printing machine; 101. a base; 102. a top seat; 103. a column; 110. a print head; 120. an oil sump; 1211. a first printed information area; 1212. a second printed information area; 1213. a third printed information area; 1214. a fourth printed information area; 20. a product setting mechanism; 210. an index plate; 211. a card slot; 220. a connecting shaft; 23. mounting a plate; 24. a support plate; 30. a stop mechanism; 31. an elastic member; 32. a roller; 33. a support; 331. a bottom surface; 34. a guide post; 40. a base plate; 500. a to-be-printed matter; 501. a first surface to be printed; 502. a second surface to be printed; 503. a third surface to be printed; 504. and the fourth surface to be printed.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present disclosure. One skilled in the art, however, will understand that the following description merely illustrates alternative embodiments of the disclosure and that the disclosure may be practiced without one or more of these details. In addition, some features that are well known in the art have not been described in detail to avoid obscuring the present disclosure.

As shown in fig. 1a to 2, the multi-surface pad printing apparatus includes a pad printer 10, a product setting mechanism 20, and a stop mechanism 30, and the pad printer 10, the product setting mechanism 20, and the stop mechanism 30 are all provided on a base plate 40. The pad printing machine 10 includes a base, a printing head 110 and an oil bath 120, the printing head 110 is movably disposed on the base, the oil bath 120 is disposed on the base, specifically, the base may be composed of a base 101, a column 103 and a top base 102, the column 103 is connected between the base 101 and the top base 102 to make the base integrally form a U shape with one end opened, the opening can avoid the printing head 110 from interfering when moving, the oil bath 120 is disposed on the base 101, the printing head 110 is connected with an X-direction driving member and a Z-direction driving member to be able to move in X-direction and Z-direction relative to the oil bath 120, the X-direction driving member and the Z-direction driving member may use a common servo motor, the oil bath 120 is provided with a plurality of printing information areas side by side in X-direction, the printing information areas are steel plate icons, information on the 4 steel plate icons is different, and for the purpose of distinguishing with a structure having 4 printing information areas shown in the figure, in the X direction from the opening toward the pillar 103, 4 printed information areas are defined as a first printed information area 1211, a second printed information area 1212, a third printed information area 1213, and a fourth printed information area 1214, respectively. The product setting mechanism 20 is used to set a to-be-printed product 500 including a plurality of to-be-printed surfaces, corresponding to the oil bath 120 having 4 printed information areas, the to-be-printed product 500 is a square body including 4 to-be-printed surfaces, for example, the to-be-printed product 500 may be a C-shell of a notebook computer, for the sake of distinction, the 4 surfaces to be printed are respectively defined as a first surface to be printed 501, a second surface to be printed 502, a third surface to be printed 503 and a fourth surface to be printed 504, the product setting mechanism 20 includes a rotatable index plate 210 and a connecting shaft 220 connected to the index plate 210 and rotatable with the index plate 210, the product 500 to be printed is disposed on the connecting shaft 220, specifically, the product setting mechanism 20 includes a mounting plate 23 and two support plates 24, the connecting shaft 220 is disposed on the two support plates 24 through a bearing seat, one end of the connecting shaft 220 is disposed on the index plate 210, and the other end is disposed on the product 500 to be printed. The stop mechanism 30 is used to stop the index plate 210 so that any one of the surfaces to be printed of the article 500 to be printed can be in the printing position. Wherein movement of the print head 110 in the X-direction is defined as movement between the printed information area and the print position along the X-direction.

The indexing disc 210 is provided with 4 clamping grooves 211 corresponding to the squares of 4 faces to be printed, the 4 clamping grooves 211 divide the outer edge of the indexing disc 210 into 4 sections of arc edges, the stopping mechanism 30 comprises an elastic member 31 and a roller 32, when a rotating acting force is applied to the indexing disc 210 to enable the indexing disc 210 to rotate, the elastic member 31 is compressed, and the roller 32 is attached to the arc edges; when the acting force is removed, the roller 32 is in a position of being engaged with the engaging groove 211 under the restoring force of the elastic member 31 to stop the index plate 210, and the elastic member 31 may be a conventional spring. Due to the arrangement of the elastic member 31, the roller 32 and the slot 211, the index plate 210 can be stopped smoothly so that any one of the surfaces to be printed of the article 500 to be printed can be in the printing position. It should be understood that the number of the clamping grooves 211 is not limited to 4, and when the to-be-printed product 500 is a triangular body including 3 to-be-printed surfaces, the indexing disc 210 may have 3 clamping grooves 211 in the circumferential direction, and the 3 clamping grooves 211 divide the outer edge of the indexing disc 210 into 3 arc-shaped edges; or, when the to-be-printed product 500 is a pentagonal body including 5 to-be-printed surfaces, the indexing disc 210 may also have 5 clamping grooves 211 in the circumferential direction, and the 5 clamping grooves 211 divide the outer edge of the indexing disc 210 into 5 arc-shaped edges, that is, the number of the clamping grooves 211 in the circumferential direction of the indexing disc 210 may be determined according to the number of the to-be-printed surfaces of the to-be-printed product 500.

To facilitate the positioning of the roller 32, the roller 32 is disposed on a seat 33, the seat 33 having a bottom surface 331, the bottom surface 331 being connected to one end of the elastic member 31.

In an embodiment, the stopping mechanism 30 further includes a guide post 34, the support 33 is slidably connected with the guide post 34 and is defined to be capable of moving along the guide post 34, and based on the guiding action of the guide post 34, when the elastic member 31 is compressed by the acting force, the support 33 moves downwards, so that the roller 32 is disengaged from the clamping groove 211, and the indexing disc 210 rotates; when the force is removed, the elastic element 31 is reset, the support 33 moves upwards, the rollers 32 enter the slots 211, and the indexing disk 210 stops rotating.

In one embodiment, the plurality of printed information areas and the plurality of surfaces to be printed are in one-to-one correspondence. Referring to fig. 3a, 5a, 7a and 9a in combination, for the oil bath 120 with 4 printing information areas and the to-be-printed product 500 to be a square structure including 4 to-be-printed surfaces, a first printing information area 1211, a second printing information area 1212, a third printing information area 1213 and a fourth printing information area 1214 are respectively in one-to-one correspondence with the first to-be-printed surface 501, the second to-be-printed surface 502, the third to-be-printed surface 503 and the fourth to-be-printed surface 504, that is, the first printing information area 1211 corresponds to the first to-be-printed surface 501, the second printing information area 1212 corresponds to the second to-be-printed surface 502, the third printing information area 1213 corresponds to the third to-be-printed surface 503, and the fourth printing information area 1214 corresponds to the fourth to-be-printed surface 504, when the first to-be-printed surface 501 is in the printing position, the movement of the printing head 110 in the X direction is limited to the movement between the first printing information area 1211 and the printing position in the X direction, when the second surface to be printed 502 is in the printing position, the movement of the print head 110 in the X direction is defined as moving between the second printing information area 1212 and the printing position in the X direction, when the third surface to be printed 503 is in the printing position, the movement of the print head 110 in the X direction is defined as moving between the third printing information area 1213 and the printing position in the X direction, and when the fourth surface to be printed 504 is in the printing position, the movement of the print head 110 in the X direction is defined as moving between the fourth printing information area 1214 and the printing position in the X direction.

The multi-surface pad printing method of the present disclosure prints a to-be-printed product 500 including a plurality of to-be-printed surfaces by the multi-surface pad printing apparatus as described above, including:

a step of mounting the to-be-printed product 500, for disposing the to-be-printed product 500 on the connecting shaft 220;

an oil adding step of pouring oil required for printing into the oil groove 120;

a step of rotating and stopping the index plate 210, in which the index plate 210 is rotated to enable one surface to be printed of the to-be-printed product 500 to be in a printing position and then the index plate 210 is stopped;

a step of the printing head 110 picking up the oil, which is to move the printing head 110 along the X direction to the upper part of one of the information printing areas and then move along the Z direction to pick up the oil in the oil groove 120;

the step of contacting the printing head 110 with the oil adhered thereon with the surface to be printed is used for moving the printing head 110 with the oil adhered thereon along the X direction to a printing position to contact with the surface to be printed of the product to be printed 500, and resetting the printing head 110 after one-side printing is finished;

and repeating the steps of rotating and stopping the index plate 210, adhering the oil by the printing head 110 and contacting the printing head 110 with the oil until the printing of the plurality of surfaces to be printed is finished.

In an embodiment of the present disclosure, in the step of rotating and stopping the index plate 210, the index plate 210 is rotated by applying a force on the index plate 210 to compress the elastic member 31, so that the roller 32 abuts against the arc-shaped edge; and when the acting force is removed, the roller 32 is in a clamping position with the clamping groove 211 through the reset of the elastic piece 31 so as to stop the dividing plate 210.

In an embodiment of the present disclosure, before the step of the printing head 110 picking up the oil, a step of adjusting the printing head 110 is further included, which is used to set an initial position of the printing head 110 in the Z direction to avoid interference when the printing head 110 moves in the X direction.

The working process of the multi-surface pad printing device will be described in detail below by taking four sides of the printed notebook computer C case as an example.

Firstly, a notebook computer C shell (i.e., a to-be-printed product 500) is arranged on a connecting shaft 220, 4 side surfaces of the notebook computer C shell are respectively a first to-be-printed surface 501, a second to-be-printed surface 502, a third to-be-printed surface 503 and a fourth to-be-printed surface 504, and different information needs to be printed on the 4 to-be-printed surfaces of the first to-be-printed surface 501, the second to-be-printed surface 502, the third to-be-printed surface 503 and the fourth to-be-printed surface 504; then, the oil required for printing is poured into the oil groove 120; then, the print head 110 is set. It should be appreciated that the addition of oil, the installation of the laptop C-shell, and the commissioning of the print head 110 are not required in sequence, and printing can begin after the preparation is complete.

As shown in fig. 3a, 3b and 4, the index plate 210 is set to the 0 ° position to make the first surface to be printed 501 at the printing position, the printing head 110 moves to the position right above the first printing information area 1211 under the driving of the X-directional driving member, the Z-directional driving member controls the printing head 110 to stick the oil at the position of the first printing information area 1211, and then moves from the position of the first printing information area 1211 to the printing position under the driving of the X-directional driving member, and the printing head 110 is controlled by the Z-directional driving member to complete the printing of the first surface to be printed 501.

As shown in fig. 5a, 5b and 6, the index plate 210 is rotated to a 90 ° position to make the second surface to be printed 502 at a printing position, the printing head 110 is moved to a position right above the second printing information area 1212 by the X-directional driving unit, the Z-directional driving unit controls the printing head 110 to stick the oil at the position of the second printing information area 1212, and then the printing head 110 is moved from the position of the second printing information area 1212 to the printing position by the X-directional driving unit, and the Z-directional driving unit controls the printing head 110 to complete printing of the second surface to be printed 502.

As shown in fig. 7a, 7b and 8, the index plate 210 is rotated to a position of 180 ° to make the third surface to be printed 503 at the printing position, the printing head 110 is moved to a position right above the third printing information area 1213 by the driving member in the X direction, the driving member in the Z direction controls the printing head 110 to pick up the oil at the position of the third printing information area 1213, and then the printing head 110 is moved from the position of the third printing information area 1213 to the printing position by the driving member in the X direction, and the driving member in the Z direction controls the printing head 110 to complete the printing of the third surface to be printed 503.

As shown in fig. 9a, 9b and 10, the index plate 210 is rotated to a 270 ° position to make the fourth surface to be printed 504 at a printing position, the print head 110 is moved to a position right above the fourth printed information area 1214 by the X-directional driving unit, the Z-directional driving unit controls the print head 110 to stick the oil at the position of the fourth printed information area 1214, and then the ink is moved from the position of the fourth printed information area 1214 to the printing position by the X-directional driving unit, and the print head 110 is controlled by the Z-directional driving unit to complete printing of the fourth surface to be printed 504.

As can be seen from the above specific printing process, in the step of the printing head 110 picking up the oil, the printing head 110 is moved to the position above the corresponding printing information area according to the corresponding relationship between the surface to be printed and the printing information area, and then moved in the Z direction to pick up the oil in the oil groove 120.

In summary, it can be seen that the multi-side pad printing device of the present disclosure has the following advantages: based on the arrangement of the pad printing machine 10 and the index plate 210, multi-surface printing can be completed by clamping once, so that the printing capacity is improved, and the labor cost is reduced; and, control through graduated disk 210 and treat the printed matter 500 gestures, on the one hand, avoided clamping many times and dismantle the printed character quality problem that the in-process caused, promoted the printing quality, on the other hand, need not servo control mechanism and treat the printed matter position and control, equipment cost is low.

In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the orientation terms is generally based on the orientation or positional relationship shown in the drawings, and is for convenience only to facilitate the description of the present disclosure and to simplify the description, and in the case of not having been stated to the contrary, these orientation terms are not intended to indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be taken as limiting the scope of the present disclosure; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are capable of operation in sequences other than those illustrated or otherwise described herein.

The present disclosure has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the present disclosure to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, and that many variations and modifications may be made in light of the teaching of the present disclosure, all of which fall within the scope of the claimed disclosure. The scope of the disclosure is defined by the appended claims and equivalents thereof.

Claims

1. A multi-sided pad printing apparatus, comprising:

the pad printing machine (10), the pad printing machine (10) comprises a printing head (110) and an oil groove (120), the printing head (110) can move in the X direction and the Z direction relative to the oil groove (120), and the oil groove (120) is provided with a plurality of printing information areas in the X direction side by side;

the product setting mechanism (20) is used for setting a to-be-printed product (500) comprising a plurality of to-be-printed surfaces, and comprises a rotatable dividing plate (210) and a connecting shaft (220) which is connected with the dividing plate (210) and can rotate along with the dividing plate (210), wherein the to-be-printed product (500) is arranged on the connecting shaft (220); and

a stop mechanism (30) for stopping the index plate (210) to allow one of the surfaces to be printed of the article to be printed (500) to be in a printing position;

wherein movement of the print head (110) in the X direction is defined as movement in the X direction between the printed information zone and the print position.

2. The multi-surface pad printing device according to claim 1, wherein the index plate (210) has N clamping grooves (211) in the circumferential direction, the N clamping grooves (211) divide the outer edge of the index plate (210) into N arc-shaped edges, the stop mechanism (30) comprises an elastic member (31) and a roller (32), when a force is applied to the index plate (210) to rotate the index plate (210), the elastic member (31) is compressed, and the roller (32) abuts against the arc-shaped edges; when the acting force is removed, the roller (32) is positioned at the position clamped with the clamping groove (211) under the action of the restoring force of the elastic piece (31) so as to stop stopping the dividing plate (210).

3. The multi-sided pad printing device according to claim 2, wherein the roller (32) is disposed on a support (33), the support (33) having a bottom surface (331), the bottom surface (331) being connected to one end of the resilient member (31).

4. The multi-sided pad printing device according to claim 3, wherein the stop mechanism (30) further comprises a guide post (34), and the sliding connection of the support (33) and the guide post (34) is defined to be movable along the guide post (34).

5. The multi-sided pad printing device according to claim 2, wherein the index plate (210) has 4 clamping grooves (211) in the circumferential direction, the 4 clamping grooves (211) divide the outer edge of the index plate (210) into 4 arc-shaped edges, and the article to be printed (500) is a square having 4 faces to be printed.

6. The multi-sided pad printing apparatus of claim 1 wherein a plurality of the printed information areas correspond one-to-one with a plurality of the sides to be printed, respectively.

7. A multi-sided pad printing method, characterized in that a to-be-printed product (500) including a plurality of to-be-printed sides is printed by the multi-sided pad printing apparatus of any one of claims 1 to 6, comprising:

a step of mounting a to-be-printed product (500), which is used for arranging the to-be-printed product (500) on the connecting shaft (220);

an oil adding step for pouring oil required for printing into the oil groove (120);

a step of rotating and stopping the index plate (210), which is used for rotating the index plate (210) to enable one surface to be printed of the article to be printed (500) to be in a printing position and then stopping the index plate (210);

a step of the printing head (110) picking up oil, which is used for moving the printing head (110) to the position above one of the information printing areas along the X direction and then moving along the Z direction to pick up the oil in the oil groove (120);

the step that the printing head (110) stuck with the oil contacts the surface to be printed is used for moving the printing head (110) stuck with the oil along the X direction to a printing position to contact the surface to be printed of the product to be printed (500), and the printing head (110) resets after one-side printing is finished;

and repeating the steps of rotating and stopping the index plate (210), adhering the oil by the printing head (110) and contacting the printing head (110) with the surface to be printed after the oil is adhered until the plurality of surfaces to be printed are printed.

8. The multi-surface pad printing method according to claim 7, wherein in the step of the printing head (110) picking up the oil, the printing head (110) is moved above the corresponding printing information area according to the corresponding relationship between the surface to be printed and the printing information area, and then moved in the Z direction to pick up the oil in the oil groove (120).

9. The multi-surface pad printing method according to claim 7, wherein in the step of rotating and stopping the index plate (210), the index plate (210) is rotated by applying a force to the index plate (210) to compress the elastic member (31) so that the roller (32) abuts against the arc-shaped edge; when the acting force is removed, the roller (32) is positioned at the position clamped with the clamping groove (211) through the reset of the elastic piece (31) so as to stop the dividing plate (210).

10. The multi-sided pad printing method according to claim 7, further comprising a step of adjusting the print head (110) before the step of adhering the oil to the print head (110), for setting an initial position of the print head (110) in the Z direction to avoid interference when the print head (110) moves in the X direction.