Printing mechanism

Abstract

The utility model discloses a printing mechanism which comprises a conveying structure, a rotary table structure, a deviation rectifying structure and a printing structure, and the conveying structure is arranged on the peripheral side of the rotary table structure and used for conveying double workpieces; the rotating disc structure is provided with a feeding station, a deviation rectifying station, a printing station and a discharging station which are sequentially arranged. The deviation rectifying structure is located at the deviation rectifying station; the printing structure is located at the printing station; when the conveying structure conveys the double workpieces to the feeding station, the rotary disc structure can drive the double workpieces to sequentially pass through the deviation rectifying station and the printing station to the discharging station. Therefore, the positions of the double workpieces can be rectified before printing, the same printing structure is conveniently used for printing the double workpieces, and another printing structure does not need to be arranged for respective printing.

Description

Technical Field

[0001] This utility model relates to the field of printing technology, and more specifically, to a printing mechanism. Background Technology

[0002] Currently, most commercially available dual-half-wafer silicon wafer printing equipment uses a six-station turntable structure. This structure requires a large-diameter turntable to accommodate six stations, including a loading station, a web guiding station, two printing stations, an inspection station, and a unloading station.

[0003] In this design, each of the two adjacent printing stations has its own independent screen printing mechanism for printing on the two halves of the silicon wafer separately. This design results in the current dual-half silicon wafer printing equipment being bulky, occupying a large amount of production line space, and hindering equipment layout and production line expansion. Utility Model Content

[0004] The purpose of this invention is to provide a new technical solution for printing mechanisms.

[0005] According to one aspect of the present invention, a printing mechanism is provided.

[0006] The printing mechanism includes:

[0007] Conveying structure, turntable structure, correction structure, and printing structure;

[0008] The conveying structure is disposed on the periphery of the turntable structure and is used to convey two workpieces;

[0009] A turntable structure having a loading station, a correction station, a printing station and a unloading station arranged in sequence.

[0010] A correction structure is located at the correction station;

[0011] A printing structure located at the printing station;

[0012] When the conveying structure transports the two workpieces to the loading station, the turntable structure can drive the two workpieces to pass sequentially through the correction station and the printing station to the unloading station.

[0013] Optionally, the conveying structure includes a first conveying section, a second conveying section, and a transport section. The first conveying section is used to convey the double workpieces to be printed to the transport station. The transport section faces the first conveying section and is used to transport the double workpieces at the transport station to the loading station of the turntable structure. The second conveying section is located at the unloading station of the turntable structure and is used to convey the printed double workpieces transferred out from the unloading station.

[0014] Optionally, the conveying unit includes a first base, a first driving member, a swing arm bracket, and two first suction cups. The first driving member is disposed on the first base, one end of the swing arm bracket is connected to the output end of the first driving member, and the other end of the swing arm bracket is connected to the two first suction cups.

[0015] Driven by the first driving component, the swing arm bracket can rotate and drive the two first suction cups and the two workpieces they adsorb from the handling station to the loading station.

[0016] Optionally, the first conveying section and / or the second conveying section may include at least one section of conveyor belt.

[0017] Optionally, the first conveying unit includes a first conveyor belt, a linear conveyor, and a second conveyor belt. The linear conveyor is connected between the first conveyor belt and the second conveyor belt. The linear conveyor is used to transfer the dual workpieces to be printed conveyed by the first conveyor belt to the second conveyor belt. The linear conveyor has a first angle with the first conveyor belt and a second angle with the second conveyor belt.

[0018] Optionally, the conveying unit includes a swing arm bracket and two first suction cups connected to the swing arm bracket;

[0019] The transport unit is located in the transport direction of the second conveyor belt, and there is a third included angle between the arrangement direction of the two first suction cups and the extension direction of the swing arm bracket;

[0020] Alternatively, the transport section is located on the side of the second conveyor belt closer to the turntable structure, and the arrangement direction of the two first suction cups is parallel to the extension direction of the swing arm bracket.

[0021] Optionally, the linear conveyor includes a second base, a second drive member, a first bracket, and two second suction cups connected to the first bracket. The second drive member is disposed on the second base, and the first bracket is movably connected to the second base.

[0022] Driven by the second driving component, the first bracket can drive the two second suction cups and the two workpieces to be printed adsorbed thereto to move in a straight line along the second base.

[0023] Optionally, the correction structure includes a third base, a third driving component, a second bracket, and a correction platform. The third driving component and the second bracket are respectively connected to the third base. The second bracket is drivenly connected to the output end of the third driving component. The correction platform is disposed on the second bracket and connected to two third suction cups. The correction platform can drive the two workpieces to be printed adsorbed by the two third suction cups to perform position correction.

[0024] Driven by the third driving component, the second bracket can drive the correction platform to move up and down along the third base to move closer to or away from the correction station.

[0025] Optionally, it also includes a first detection structure, which is located at the loading station and is used to perform pre-printing inspection on the dual workpieces at the loading station. The first detection structure is signal-connected to the correction platform so as to transmit the detection information to the correction platform.

[0026] Optionally, it also includes a second detection structure, which is located at the unloading station and is used to perform post-printing inspection on the dual workpieces at the unloading station.

[0027] Optionally, the system includes two conveying structures, two turntable structures, two correction structures, and two printing structures. The two conveying structures are spaced apart, and the two turntable structures are arranged opposite to each other with their loading stations close to each other and their printing stations far apart.

[0028] One technical advantage of this utility model is:

[0029] The printing mechanism includes a conveying structure, a turntable structure, a correction structure, and a printing structure. The conveying structure is located around the turntable structure and is used to convey dual workpieces. The turntable structure has a loading station, a correction station, a printing station, and a unloading station arranged sequentially. The correction structure is located at the correction station; the printing structure is located at the printing station. When the conveying structure conveys the dual workpieces to the loading station, the turntable structure can drive the dual workpieces sequentially through the correction station and the printing station to the unloading station. This allows for position correction of the dual workpieces before printing, facilitating printing both workpieces using the same printing structure without the need for a separate printing structure, thus improving printing efficiency and reducing the space occupied and production costs of the printing mechanism.

[0030] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, which form part of this specification, illustrate embodiments of the present invention and, together with the specification, serve to explain the principles of the present invention.

[0032] Figure 1 This is a schematic diagram of a printing mechanism according to an embodiment of the present utility model;

[0033] Figure 2 This is another schematic diagram of a printing mechanism according to an embodiment of the present utility model;

[0034] Figure 3 This is a schematic diagram of a conveying unit according to an embodiment of the present utility model;

[0035] Figure 4 This is a schematic diagram of a linear conveyor according to an embodiment of the present utility model;

[0036] Figure 5 This is a schematic diagram of a correction structure according to an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Conveying structure; 11. First conveying section; 111. First conveyor belt; 112. Linear conveyor component; 1121. Second base; 1122. Second drive component; 1123. First support; 1124. Second suction cup; 113. Second conveyor belt; 12. Second conveying section; 13. Handling section; 131. First base; 132. First drive component; 133. Swing arm support; 134. First suction cup; 2. Turntable structure; 3. Correction structure; 31. Third base; 32. Third drive component; 33. Second support; 34. Correction platform; 35. Third suction cup; 4. Printing structure; 5. First detection structure; 6. Second detection structure. Detailed Implementation

[0039] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0040] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0041] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0042] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0044] This invention provides a printing mechanism that can print on two workpieces during the production process, thereby improving printing efficiency.

[0045] For example, the dual-workpiece design can be two silicon wafers. That is, the mechanism can be used to simultaneously print two silicon wafers during the battery manufacturing process, thereby improving printing efficiency.

[0046] like Figure 1 and Figure 2 As shown, the printing mechanism provided by this utility model includes:

[0047] Conveying structure 1, turntable structure 2, correction structure 3, and printing structure 4;

[0048] The conveying structure 1 is disposed on the periphery of the turntable structure 2 and is used to convey two workpieces;

[0049] Turntable structure 2, wherein the turntable structure 2 has a feeding station, a correction station, a printing station and a unloading station arranged in sequence;

[0050] Correction structure 3, the correction structure 3 being located at the correction station;

[0051] Printing structure 4, which is located at the printing station;

[0052] When the conveying structure 1 conveys the two workpieces to the loading station, the turntable structure 2 can drive the two workpieces to pass through the correction station and the printing station in sequence to the unloading station.

[0053] Specifically, the conveying structure 1 can adopt a dual-track synchronous conveying system to simultaneously convey two workpieces, facilitating subsequent correction and printing processes. The conveying structure 1 is located on the periphery of the turntable structure 2, which facilitates the loading and unloading of the two workpieces.

[0054] like Figure 1 and Figure 2As shown, the turntable structure 2 has a loading station, a correction station, a printing station, and a unloading station arranged sequentially along a first direction, for example, counterclockwise as shown in the figure. These four stations can be evenly distributed to facilitate convenient control of the rotation of the turntable structure 2. When the turntable structure 2 rotates along the first direction, for example, counterclockwise as shown in the figure, the turntable structure 2 can drive the two workpieces at the loading station to pass sequentially through the correction station and the printing station to the unloading station for unloading, facilitating the printing cycle.

[0055] The turntable structure 2 may include a turntable body and a drive unit, the drive unit being used to drive the turntable body to rotate. The turntable body may also have an adsorption unit, which is used to adsorb the two workpieces placed on it, thereby ensuring the stability of the two workpieces during the rotation of the turntable body, avoiding printing defects caused by displacement, and thus ensuring printing reliability.

[0056] like Figure 1 and Figure 2 As shown, when the conveying structure 1 transports the two workpieces to the loading station of the turntable structure 2, the turntable structure 2 can drive the two workpieces on it to rotate together in the first direction to the correction station. At this time, the correction structure 3 at the correction station can correct the position of the two workpieces, so that the two workpieces are in a preset position. This preset position ensures the reliable implementation of subsequent printing processes, thereby reducing printing defects and improving the printing yield. Furthermore, this preset position can be pre-set in the correction structure 3.

[0057] Among them, the correction structure 3 performs position correction for the two workpieces: it can perform synchronous position correction for the two workpieces, that is, the two workpieces are corrected together in one correction action; or it can perform independent position correction for the two workpieces, that is, the correction of one workpiece is achieved in one correction action.

[0058] To avoid interference between the correction process of the correction structure 3 and the turntable structure 2, the working position of the correction platform 34 in the correction structure 3 can be set higher than that of the turntable structure 2. When the two workpieces move to the correction station, the correction platform 34 can descend and attract the two workpieces, then drive the two workpieces to rise to the working position for correction. After the correction is completed, the correction platform 34 descends again to put the two workpieces back onto the turntable structure 2, and finally returns to the working position.

[0059] like Figure 1 and Figure 2 As shown, after the correction is completed, the turntable structure 2 continues to drive the two workpieces on it to rotate together in the first direction to the printing station. At this time, the printing structure 4 at the printing station can print on the two workpieces, thereby improving the printing efficiency of the printing mechanism.

[0060] Among them, the printing structure 4 prints on two workpieces: it can print on two workpieces simultaneously, that is, print on two workpieces together in one printing action; or it can print on two workpieces separately and independently, that is, print on one workpiece in one printing action.

[0061] Similarly, in order to avoid the printing process of printing structure 4 interfering with the turntable structure 2, the printing section of printing structure 4 can be set higher than the turntable structure 2.

[0062] After printing is completed, the turntable structure 2 continues to drive the two workpieces on it to rotate together in the first direction to the unloading station so that the next process can be conveyed out from the unloading station.

[0063] Compared to traditional single-wafer printing mechanisms, the printing mechanism provided by this invention can realize the conveying, correction, printing, and unloading of dual silicon wafers, improving the utilization rate and printing efficiency of the printing mechanism. Moreover, since dual workpieces can be printed at one printing station, there is no need to set up a separate printing structure 4, thereby reducing the production cost and space occupied by the printing mechanism and facilitating the miniaturization of the printing mechanism.

[0064] Optionally, the conveying structure 1 includes a first conveying section 11, a second conveying section 12, and a transport section 13. The first conveying section 11 is used to convey the double workpiece to be printed to the transport station. The transport section 13 faces the first conveying section 11 and is used to transport the double workpiece at the transport station to the loading station of the turntable structure 2. The second conveying section 12 is located at the unloading station of the turntable structure 2 and is used to convey the printed double workpiece transferred out from the unloading station.

[0065] like Figure 1 As shown, the first conveying unit 11 may include one, two, or more conveyor belts connected in sequence to transport the two workpieces to be printed to the handling station, so that the handling unit 13 at the handling station can transfer the two workpieces to the loading station of the turntable structure 2. The handling unit 13 may be a handling robot. The handling station is the end point of the first conveying unit 11, and the location of the handling unit 13 at the handling station facilitates the efficient transfer of the two workpieces.

[0066] Similarly, the second conveying unit 12 may also include one, two or more conveyor belts connected in sequence to transport the printed double workpieces from the unloading station to the next processing station.

[0067] Both the first conveying section 11 and the second conveying section 12 can adopt a dual-track synchronous conveying system to simultaneously convey two workpieces.

[0068] Optionally, the conveying unit 13 includes a first base 131, a first driving member 132, a swing arm bracket 133 and two first suction cups 134. The first driving member 132 is disposed on the first base 131. One end of the swing arm bracket 133 is connected to the output end of the first driving member 132, and the other end of the swing arm bracket 133 is connected to the two first suction cups 134.

[0069] Driven by the first driving component 132, the swing arm bracket 133 can rotate and drive the two first suction cups 134 and the two workpieces they adsorb from the handling station to the loading station.

[0070] like Figure 3 As shown, the first base 131 is used to support and mount the first driving component 132, which may include a motor and a reducer. The first suction cup 134 may be a Bernoulli suction cup or other suction cup, which is used to adsorb the workpiece to facilitate its transfer.

[0071] Driven by the first driving component 132, the swing arm bracket 133 can rotate, causing the two first suction cups 134 to rotate together. This allows the two workpieces held by the two first suction cups 134 to rotate and be transferred from the handling station to the loading station of the turntable structure 2, thus facilitating subsequent web-correction and printing processes. Furthermore, using the rotational motion of the swing arm bracket 133 to transfer the two workpieces shortens the transfer time and improves loading efficiency compared to linear movement.

[0072] Optionally, the first conveying section 11 and / or the second conveying section 12 may include at least one section of conveyor belt.

[0073] Specifically, the first conveying unit 11 may include one, two, or more conveyor belts connected in sequence to transport the two workpieces to be printed to the handling station, so that the handling unit 13 at the handling station can transfer the two workpieces to the loading station of the turntable structure 2.

[0074] Similarly, the second conveying unit 12 can be configured to include one, two, or more conveyor belts connected in sequence, so as to transport the printed double workpieces from the unloading station to the next processing station.

[0075] Optionally, the first conveying unit 11 includes a first conveyor belt 111, a linear conveyor 112, and a second conveyor belt 113. The linear conveyor 112 is connected between the first conveyor belt 111 and the second conveyor belt 113. The linear conveyor 112 is used to transfer the dual workpieces to be printed conveyed by the first conveyor belt 111 to the second conveyor belt 113. The linear conveyor 112 has a first included angle with the first conveyor belt 111 and a second included angle with the second conveyor belt 113.

[0076] like Figure 1 and Figure 2 As shown, by using the combination of the first conveyor belt 111, the linear conveyor 112, and the second conveyor belt 113, it is possible to easily adapt to various conveying paths, thereby ensuring the reliability of the conveying process.

[0077] The first conveyor belt 111 and the second conveyor belt 113 can be set to be parallel, and the linear conveyor 112 can be vertically connected between the two to enable the switching of the conveying path, so as to facilitate the conveying of the two workpieces to be printed to the loading station of the turntable structure 2.

[0078] Optionally, the conveying unit 13 includes a swing arm bracket 133 and two first suction cups 134 connected to the swing arm bracket 133;

[0079] The transport unit 13 is located in the transport direction of the second conveyor belt 113, and there is a third included angle between the arrangement direction of the two first suction cups 134 and the extension direction of the swing arm bracket 133.

[0080] Alternatively, the transport section 13 is located on the side of the second conveyor belt 113 near the turntable structure 2, and the arrangement direction of the two first suction cups 134 is parallel to the extension direction of the swing arm bracket 133.

[0081] like Figure 1 and Figure 3 As shown, when the transport unit 13 is located in the transport direction of the second conveyor belt 113, that is, when the transport unit 13 is facing the end point of the second conveyor belt 113, the arrangement direction of the two first suction cups 134 is set to have a third included angle with the extension direction of the swing arm bracket 133. This facilitates the two first suction cups 134 to synchronously adsorb the two workpieces to be printed on the second conveyor belt 113, and thus enables synchronous transfer after the swing arm bracket 133 rotates.

[0082] In another embodiment, when the transport unit 13 is located on the side of the second conveyor belt 113 near the turntable structure 2, that is, when the transport unit 13 is not located in the transport direction of the second conveyor belt 113, the arrangement direction of the two first suction cups 134 can be set to be parallel to the extension direction of the swing arm bracket 133. At this time, the two first suction cups 134 on the swing arm bracket 133 adsorb the double workpieces to be printed from one side and achieve synchronous transfer after the swing arm bracket 133 rotates.

[0083] Optionally, the linear conveyor 112 includes a second base 1121, a second drive member 1122, a first bracket 1123, and two second suction cups 1124 connected to the first bracket 1123. The second drive member 1122 is disposed on the second base 1121, and the first bracket 1123 is movably connected to the second base 1121.

[0084] Driven by the second driving member 1122, the first bracket 1123 can drive the two second suction cups 1124 and the two workpieces to be printed adsorbed to move in a straight line along the second base 1121.

[0085] like Figure 4 As shown, the second base 1121 is used to support and mount the second drive component 1122 and the first bracket 1123. The second drive component 1122 may include a motor, reducer, cylinder, etc. The second suction cup 1124 may be a Bernoulli suction cup or other suction cup, which is used to adsorb the workpiece to facilitate the transfer of the workpiece.

[0086] Two, four, six or more second suction cups 1124 are fixed to the first bracket 1123, and the first bracket 1123 is slidably connected to the second base 1121, so that under the drive of the second driving member 1122, the first bracket 1123 can drive the second suction cups 1124 and the double workpieces to be printed adsorbed to slide together along the guide rail on the second base 1121, and realize the conveying of the double workpieces to be printed.

[0087] Optionally, the correction structure 3 includes a third base 31, a third driving member 32, a second bracket 33, and a correction platform 34. The third driving member 32 and the second bracket 33 are respectively connected to the third base 31. The second bracket 33 is drivenly connected to the output end of the third driving member 32. The correction platform 34 is disposed on the second bracket 33 and connected to two third suction cups 35. The correction platform 34 can drive the two workpieces to be printed adsorbed by the two third suction cups 35 to perform position correction.

[0088] Driven by the third driving component 32, the second bracket 33 can drive the correction platform 34 to move up and down along the third base 31 to move closer to or away from the correction station.

[0089] like Figure 5 As shown, the third base 31 is used to support and mount the third drive component 32 and the second bracket 33. The third drive component 32 may include a combination of a motor and a ball screw, a combination of a cylinder and a guide rail, etc. The third suction cup 35 may be a Bernoulli suction cup or other suction cups, which are used to adsorb the workpiece to facilitate the position correction of the workpiece.

[0090] The alignment platform 34 is fixed to the second bracket 33, which may include multiple connected connecting plates. The second bracket 33 is slidably connected to the nut of the ball screw, so that it can move up and down along the axis of the ball screw under the drive of the motor and the ball screw, and can approach the alignment station for the adsorption and placement of two workpieces.

[0091] After the correction platform 34 picks up the two workpieces to be printed using the two third suction cups 35, the correction platform 34 can move and / or rotate the two third suction cups 35 and the picked-up two workpieces to achieve position correction and place the two workpieces in a preset position. This preset position ensures the reliable implementation of subsequent printing processes, thereby reducing printing defects and improving the printing yield.

[0092] Optionally, it also includes a first detection structure 5, which is located at the loading station and is used to perform pre-printing detection on the dual workpieces at the loading station. The first detection structure 5 is signal-connected to the correction platform 34 so as to transmit detection information to the correction platform 34.

[0093] like Figure 1 and Figure 2 As shown, the first detection structure 5 includes, but is not limited to, a camera and a sensor. The first detection structure 5 is used to detect the position information of the two workpieces after loading and transmit the position information to the correction platform 34 so that the correction platform 34 can correct the two workpieces based on the position information.

[0094] Optionally, it also includes a second detection structure 6, which is located at the unloading station and is used to perform post-printing inspection on the dual workpieces at the unloading station.

[0095] like Figure 1 and Figure 2 As shown, the second detection structure 6 includes, but is not limited to, a camera and a sensor. The second detection structure 6 is used to detect the printing status of the two workpieces after printing, so as to determine the printing effect of the printed two workpieces.

[0096] Optionally, the system includes two conveying structures 1, two turntable structures 2, two correction structures 3, and two printing structures 4. The two conveying structures 1 are spaced apart, and the two turntable structures 2 are arranged opposite to each other with their loading stations close to each other and their printing stations far apart.

[0097] Specifically, a combination of two sets of conveying structure 1, turntable structure 2, correction structure 3 and printing structure 4 can be set up to simultaneously correct and print two sets of double workpieces, thereby improving the printing efficiency of the printing mechanism and enhancing the printing capability of the workpiece printing mechanism.

[0098] By spacing the two conveying structures 1 apart, interference between their conveying paths can be avoided, thus ensuring their conveying reliability. The loading stations of the two opposing turntable structures 2 are close to each other, while the two printing stations are far apart. This arrangement places the two loading stations inside the workpiece printing mechanism and the two printing stations outside, facilitating operator maintenance of the two outer printing structures 4.

[0099] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0100] While specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A printing mechanism, characterized by, The application relates to a double-workpiece printing device. The device comprises a conveying structure (1), a rotating disc structure (2), a deviation rectifying structure (3) and a printing structure (4). The conveying structure (1) is arranged on the periphery of the rotating disc structure (2) and is used for conveying double workpieces. The rotating disc structure (2) has a feeding station, a deviation rectifying station, a printing station and a discharging station arranged in sequence. The deviation rectifying structure (3) is located at the deviation rectifying station. The printing structure (4) is located at the printing station. When the conveying structure (1) conveys the double workpieces to the feeding station, the rotating disc structure (2) can drive the double workpieces to pass through the deviation rectifying station and the printing station in sequence to the discharging station.

2. The printing mechanism of claim 1, wherein, The conveying structure (1) comprises a first conveying part (11), a second conveying part (12) and a carrying part (13), the first conveying part (11) is used for conveying the double workpieces to be printed to a carrying station, the carrying part (13) is located towards the first conveying part (11) and is used for carrying the double workpieces at the carrying station to the feeding station of the rotating disc structure (2), and the second conveying part (12) is located at the discharging station of the rotating disc structure (2) and is used for conveying the printed double workpieces from the discharging station.

3. The printing mechanism of claim 2, wherein, The carrying part (13) comprises a first base (131), a first driving member (132), a swing arm support (133) and two first suction discs (134), the first driving member (132) is arranged on the first base (131), one end of the swing arm support (133) is connected to the output end of the first driving member (132), and the other end of the swing arm support (133) is connected to the two first suction discs (134). Under the driving of the first driving member (132), the swing arm support (133) can rotate and drive the two first suction discs (134) and the double workpieces adsorbed by the first suction discs (134) to rotate from the carrying station to the feeding station.

4. The printing mechanism of claim 2, wherein, The first conveying part (11) and / or the second conveying part (12) comprises at least one conveying belt.

5. The printing mechanism of claim 2, wherein, The first conveying part (11) comprises a first conveying belt (111), a straight conveying member (112) and a second conveying belt (113), the straight conveying member (112) is connected between the first conveying belt (111) and the second conveying belt (113), the straight conveying member (112) is used for transferring the double workpieces to be printed conveyed by the first conveying belt (111) to the second conveying belt (113), the straight conveying member (112) and the first conveying belt (111) have a first included angle, and the straight conveying member (112) and the second conveying belt (113) have a second included angle.

6. The printing mechanism of claim 5, wherein, The carrying part (13) comprises a swing arm support (133) and two first suction discs (134) connected to the swing arm support (133). The carrying part (13) is located in the conveying direction of the second conveying belt (113), and the arrangement direction of the two first suction discs (134) and the extension direction of the swing arm support (133) have a third included angle. Alternatively, the carrying part (13) is located on one side of the second conveying belt (113) close to the rotating disc structure (2), and the arrangement direction of the two first suction cups (134) is parallel to the extension direction of the swing arm support (133).

7. The printing mechanism of claim 5, wherein, The straight line conveying piece (112) comprises a second base (1121), a second driving piece (1122), a first support (1123), and two second suction cups (1124) connected to the first support (1123). The second driving piece (1122) is arranged on the second base (1121), and the first support (1123) is movably connected to the second base (1121). Under the driving of the second driving piece (1122), the first support (1123) can drive the two second suction cups (1124) and the double workpieces to be printed adsorbed thereby to move linearly along the second base (1121).

8. The printing mechanism of claim 1, wherein, The deviation rectifying structure (3) comprises a third base (31), a third driving piece (32), a second support (33), and a deviation rectifying platform (34). The third driving piece (32) and the second support (33) are connected to the third base (31) respectively. The second support (33) is in transmission connection with the output end of the third driving piece (32). The deviation rectifying platform (34) is arranged on the second support (33) and is connected with two third suction cups (35). The deviation rectifying platform (34) can drive the double workpieces to be printed adsorbed thereby to rectify the position. Under the driving of the third driving piece (32), the second support (33) can drive the deviation rectifying platform (34) to move up and down along the third base (31) to approach or move away from the deviation rectifying station.

9. The printing mechanism of claim 8, wherein, The first detection structure (5) is arranged at the feeding station and is used for detecting the double workpieces at the feeding station before printing. The first detection structure (5) is in signal connection with the deviation rectifying platform (34) to enable the detection information to be transmitted to the deviation rectifying platform (34).

10. The printing mechanism of claim 9, wherein, The second detection structure (6) is arranged at the discharging station and is used for detecting the double workpieces at the discharging station after printing.

11. The printing mechanism of claim 1, wherein, The device comprises two conveying structures (1), two rotating disc structures (2), two deviation rectifying structures (3), and two printing structures (4). The two conveying structures (1) are arranged at intervals. The two rotating disc structures (2) are arranged oppositely, and the feeding stations of the two rotating disc structures (2) are close to each other, and the printing stations of the two rotating disc structures (2) are far away from each other.

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